Background of the invention

The invention relates to the field of cleaning devices for vehicles, and in detail concerns a cleaning device for trains.

Known art

Trains are vehicles that move on rails in order to transport goods or people between a first and second location. Trains are substantially provided with a locomotive, and typically comprise at least a goods wagon or a car for the transport of passengers; more cars or goods wagons can be present in sequence in a train. Trains can also be provided with a rail car, a particular locomotive which integrates motor apparatuses and that, at the same time, is used for transporting passengers. A locomotive may be electrically powered or alternatively equipped with a heat engine, such as for example an endothermic engine or other type of unconventional power.

Trains move on a railway, also called way, that comprises typically two metal rails of steel, called rails or tracks, kept parallel to each other by securing them with sleepers, for example of wood, or of prestressed concrete, through track bolts. The distance between the two metal guides is named gauge, and corresponds substantially with the wheel base of the wheels of the carriages of the locomotive and/or of the goods wagon and/or of the car. Some gravel, or e.g. railroad ballast, is typically arranged at the railway, for realizing a stabilization ballast of the metal guides and of the sleepers.

During the use, the train gets dirty. The dirt of the train can be due to several factors among which there are, in a non-limiting way:

- insects, which mainly impact the front portion of the locomotive during the advancement,

- dust;

- atmospheric agents, such as rain;

- soot, in particular when the locomotive is equipped with a thermal engine such as a diesel or coal engine;

- iron dust or iron oxide, deriving from the wear of the rail as a result of contact with the wheels of carriages, above all during the acceleration and braking steps of the train;

- friction material, deriving for example from the wear of brake pads.

Trains are typically washed with rotary brush devices, which act on the locomotive and cars or goods wagons to clean their sides and/or top covering (colloquially referred to as “roof") and/or front portion and/or rear portion. Mere washing with water or water added with surface-active agents is not in fact sufficient to remove dirt, in particular the one with a metal component, which in the long run risks to chemically affect the painted portion of trains (or, likewise, the film that is sometimes used as the outer covering of trains). It results, therefore, necessary to combine the action of water eventually added with a mechanical action provided by the contact with a brush.

Typically, the used brushes are rotary brushes, i.e. brushes radially installed on a central shaft so as to form one roller which, with rotation, expands due to centrifugal force and engages, in use, at least partially tangentially, a surface of the train.

Brush devices of known type are typically positioned in proximity of a section of railway destined to wash trains. The brushes, oriented so as to rotate around a vertical or horizontal axis, are positioned on substantially fixed supports. The train is translated relative to the brushes, or vice versa, to cause a complete cleaning of the entire train set.

A drawback of known devices for cleaning is to require rather complex plants both in terms of the size of the area reserved for train washing stations and in terms of the resources required to their functioning, in particular with respect to the installation of supply lines for said resources.

Furthermore, as trains in circulation do not have standardized dimensions in all of their parts, it is important that the brush devices can adapt to the train undergoing cleaning operations. It is evident that the use of a fixed cleaning device, i.e. without the possibility of adjusting the position and/or inclination of the brush, cannot offer the same results when applied to a high-speed train, showing a more aerodynamic and streamlined profile, and to a goods train, which presents a more discontinuous and angular profile.

It is therefore important to have control systems able to adjust the position of the brushes so that they can always adhere optimally to the shape of the train, ensuring a proper cleaning of the train. A position that is too far away from the train would cause an insufficient cleaning action, while a position that is too close to the train would cause an excessive wear of the brushes, as well as exposing the train or the device to the risk of damages, such as scratches to the bodywork.

The known art solutions used in the cleaning of trains have some drawbacks related to the inefficiency of the relative brush position control systems in accurately and timely following the profile of the train they are affecting. This lack causes a sub-optimal cleaning action of the train, from which the dirt accumulated during use is only partially removed.

Purposes of the invention

The purpose of the present disclosure is to describe a cleaning device for trains that allows to solve the drawbacks described above.

It is a purpose of the present disclosure to show a cleaning device for trains that is particularly flexible, i.e. installable in almost any train washing station and/or able to perform an effective cleaning action on any type of train.

Another purpose of the present disclosure is to describe a cleaning device for trains that substantially adapts to any typology of train to be subjected to a cleaning treatment and/or different train movements on the railway tracks placed in the proximity of the cleaning device itself.

It is also a purpose of the present disclosure to describe a cleaning device for trains that allows to efficiently control the action, in particular the position, of brushes so as to ensure an optimal cleaning of the train. Specifically, purpose of the present disclosure is to provide cleaning device for trains that ensures a precise and quick control of the position of brushes, so as to efficiently adapt to the conditions of the train subjected to the washing.

Another purpose of the present disclosure is to describe a cleaning device for trains particularly easy to realize and install in almost any train washing station.

Summary

According to a first aspect, the present disclosure refers to a cleaning device for a train. Specifically, the present disclosure refers to a cleaning device for a train along a railway. This cleaning device is particularly adapted to be installed at a platform associated to said railway, for example in the context of a train washing station. According to an aspect, said railway is constituted by a depressed area with respect to the platform. In this depressed area is housed a pair of rails developing along a longitudinal extension direction, that substantially coincides with the centerline of said pair of rails. Said depressed area is then configured for allowing the passage of the train and shows a width, measured between said main extension direction and the platform, so as to avoid the contact between the train and the platform itself from the side of the railway in which the platform is installed.

The device for cleaning trains will be now described in some of its salient aspects. These aspects may be combined with each other in an appropriate manner, or with portions of the detailed description that follows, or also with one or more of the attached claims.

According to an aspect, said device comprises at least one brush. Said at least one brush is configured, in use, for cleaning a portion of a train by means of a mechanical action for removing dirt deriving from the contact between the brush and the surface of the train, eventually combined with the movement of the brush itself relative to said train portion.

According to a non-limiting aspect, during the use, the at least a brush is rotary.

According to a non-limiting aspect, said at least one brush comprises a plurality of bristles and/or blades and/or strips and/or fibers. According to another non-limiting aspect, the plurality of bristles and/or blades and/or strips and/or fibers is realized in plastic material or in an equivalent synthetic or natural elastically yielding material.

According to another non-limiting aspect, said at least one brush is an at least partially cylindrical brush. According to another non-limiting aspect, said at least one brush can comprise a first substantially cylindrical portion and a second portion of gradually increasing diameter. According to another non-limiting aspect, the second portion lies during use above the first portion.

Alternatively, according to another non-limiting aspect, said at least one brush can have an overall truncated cone shape, with an increasing diameter - along its longitudinal extension - from top to bottom or with an increasing diameter from bottom to top.

In the present disclosure, the terms “upwards”, “downwards”, “on”, “under" or analogous terms are to be intended with respect to a direction orthogonal to a plane on which lies the platform and/or the railway, where “upwards” corresponds to a direction of moving away from the platform/railway and “downwards” corresponds to a direction of approaching the platform/railway. Analogously, “up/on” corresponds to a distal position with respect to the platform/railway and “down/under” corresponds to a proximal position with respect to the platform/railway.

According to an aspect, the device comprises a support structure. Said support structure is connected to said platform and is configured for supporting said at least one brush.

According to a non-limiting aspect, said support structure is anchored to said platform, i.e. said support structure cannot translate with respect to said platform.

Alternatively, according to another non-limiting aspect, said support structure is connected in a movable way to said platform, i.e. said support structure can translate with respect to said platform, for example in a direction parallel to the longitudinal extension direction of the railway, i.e. to the longitudinal extension direction of relative rails.

According to an aspect, said support structure is at least partially mobile. According to this aspect, said support structure comprises a support portion and a frame movable with respect to said support portion. According to another aspect, said frame carries said at least one brush. According to yet another aspect, said support portion is associated to said platform. According to another non-limiting aspect, said support portion is anchored to said platform.

According to an aspect, said support portion is affected by a vertical dividing plane and substantially perpendicular to a longitudinal extension of said railway. In other words, said dividing plane is secant, i.e. traversing, said support portion. In the present disclosure, with the term "vertical" is intended a direction orthogonal to a plane on which lies the platform and/or the railway and with the term “longitudinal extension of said railway” is intended the direction along which develops the length of the railway, i.e. the extension direction of relative rails. Therefore, with “vertical dividing plane and substantially perpendicular to a longitudinal extension of said railway” is intended a plane orthogonal to a plane on which lies said railway and/or platform and substantially orthogonal to the longitudinal extension direction of the railway itself, i.e. substantially orthogonal to the extension direction of rails that compose said railway.

According to an aspect, said dividing plane defines a first half-space and a second half-space, each one affecting part of said support portion. Therefore, the dividing plane divides the space wherein is installed the device in two different half-spaces: these different half-spaces are represented, precisely, by said first half-space and said second half-space.

According to an aspect, said support structure is configurable between at least a first operating position and a second operating position. According to said aspect, the at least one brush carried by said frame is contained in said first half-space when said support structure is in said first operating position and in said second half-space when said support structure is in said second operating position. According to another non-limiting aspect, said movable frame is mainly contained in the first half-space when said support structure is configured in said first operating position and is mainly contained in the second half-space when said support structure is configured in said second operating position. In the present document, with the term “mainly” is intended the main part of an element, for example more than 80% of this element.

According to an aspect, the at least one brush is in a condition adapted to affect and clean said train both when the support structure is in said first operating position and when the support structure is in said second operating position. In other words, when the support structure is in said first operating position or said second operating position, the at least one brush is adapted to affect a train portion eventually present along the railway to which is associated the platform on which the cleaning device is installed.

According to a non-limiting aspect, when said support structure is in said at least an operating position (whether it is the first operating position, the second operating position or another operating position), the at least one brush is at an operating distance from said railway. According to a non-limiting aspect, said operating distance is measured with respect to the longitudinal extension direction of said railway. According to another aspect, when it is at said operating distance, the at least one brush is in a position such as to affect and clean a train eventually present on said railway. In other words when it is at said operating distance, the at least one brush affects at least partially a space above said railway. According to another non-limiting aspect, said operating distance is lower with respect to the width of the railway, wherein with width of the railway is intended the distance between the platform and the longitudinal extension direction of said railway, i.e. the centerline line of relative rails. According to another non-limiting aspect, said operating distance is selectable, i.e. is variable. In other words, said operating distance is not a fixed and predetermined distance, but instead a distance that can vary in a determined range of distances that allow an optimal contact with said train. During the use of the cleaning device, the operating distance can be varied for better adapting to the profile of the train subjected to the cleaning operations.

According to a non-limiting aspect, said support structure is, furthermore, configurable in at least a nonoperating position. In this at least a non-operating position, said at least one brush is in a condition adapted to not affect said train portion eventually present on the railway. In other words when the support structure is in said nonoperating position, the at least one brush does not affect the space above said railway.

According to a non-limiting aspect, when said support structure is in said at least a non-operating position, said at least one brush is at a non-operating distance from said railway adapted to not affect and clean said train. According to another non-limiting aspect, said non-operating distance is higher than said operating distance. According to yet another non-limiting aspect, said operating distance is higher with respect to the width of the railway, wherein with width of the railway is intended the distance between the platform and the longitudinal extension direction of said railway, i.e. with the centerline line of relative rails. According to another non-limiting aspect, said non-operating distance is the maximum distance with respect to the railway assumable by the at least one brush.

According to a non-limiting aspect, said support structure is, furthermore, configurable in at least a first nonoperating position and a second non-operating position. Said first non-operating position and second non-operating position are configurations of the support structure wherein said at least one brush is adapted to not affect said train portion In other words, when the support structure is in the first or in the second non-operating position, the at least one brush does not affect the space above said railway.

According to a non-limiting aspect, the at least one brush carried by said frame is contained in said first halfspace when said support structure is configured in said first non-operating position and in said second half-space when said support structure is configured in said second non-operating position. According to another non-limiting aspect, said movable frame is mainly contained in said first half-space when said support structure is configured in said first non-operating position and is mainly contained in said second half-space when said support structure is configured in said second non-operating position.

According to a non-limiting aspect, said first non-operating position and said second non-operating position are mirrored with respect to the dividing plane.

According to a non-limiting aspect, the frame is configured for rotating with respect to said support portion around a first axis. According to another non-limiting aspect, said first axis lies in said dividing plane. According to another non-limiting aspect, said frame is pivoted on said support portion for rotating around said first axis. In this configuration of the support structure, the frame forms with the dividing plane an angle measurable on a plane perpendicular to the first axis. According to the configuration taken on by the support structure, said angle is formed in said first half-space or in said second half-space.

According to a non-limiting aspect, the frame spaces an angle of 180° around said first axis passing from said first non-operating position to said second non-operating position or vice versa. According to another non-limiting aspect, in said first non-operating position, said frame and said dividing plane form in said first half-space an angle substantially equal to 90°. In the present document, with reference to the angle formed between the frame and the dividing plane, is intended an angle measured, preferably, in a plane orthogonal to said first axis.

According to a non-limiting aspect, when the support structure is in the first non-operating position, said at least one brush is at the maximum distance with respect to said railway, coinciding with the non-operating distance. Specifically, when the support structure is in the first non-operating position, the frame is oriented in a substantially parallel way with respect to the longitudinal extension direction of said railway, i.e. to the direction of rails of the railway itself.

According to a non-limiting aspect, said first operating position is interposed between said first non-operating position and said dividing plane, i.e. said first operating position represents at least part of the positions that the frame can take on by rotating around said first axis from said first non-operating position to said dividing plane or vice versa.

According to a non-limiting aspect, in said first operating position, said frame and said dividing plane form in said first half-space an angle comprised between 10° and 80°.

According to another non-limiting aspect, in said first operating position, said frame and said dividing plane form in said first half-space an angle comprised between 20° and 70°.

According to yet another non-limiting aspect, in said first operating position, said frame and said dividing plane form in said first half-space an angle comprised between 30° and 60°.

According to another non-limiting aspect, in said second non-operating position, said frame and said dividing plane form in said second half-space an angle substantially equal to 90°

According to a non-limiting aspect, when the support structure is in the second non-operating position, said at least one brush is at the maximum distance with respect to said railway, coinciding with said non-operating distance. Specifically, when the support structure is in the second non-operating position, the support frame is oriented in a substantially parallel way with respect to the longitudinal extension direction of said railway, i.e. to the direction of rails of the railway itself.

According to a non-limiting aspect, said second operating position is interposed between said second nonoperating position and said dividing plane, i.e. said second operating position represents at least part of the positions that the frame can take on by rotating around said first axis from said second non-operating position to said dividing plane.

According to a non-limiting aspect, in said second operating position, said frame and said dividing plane form in said second half-space an angle comprised between 10° and 80°.

According to another non-limiting aspect, in said second operating position, said frame and said dividing plane form in said second half-space an angle comprised between 20° and 70°.

According to yet another non-limiting aspect, in said second operating position, said frame and said dividing plane form in said second half-space an angle comprised between 30° and 60°.

According to a non-limiting aspect, the device comprises a first actuator. Said first actuator is operatively connected to the frame and is configured for moving said frame. According to a non-limiting aspect, said first actuator is configured for moving said frame at least when said support structure is in said first operating position or said second operating position.

According to a non-limiting aspect, said first actuator is associated with said support structure. According to another non-limiting aspect, said first actuator is associated with said support portion of the support structure. According to a non-limiting aspect, said first actuator is mounted on said support portion.

According to a non-limiting aspect, said first actuator comprises a first electric motor, i.e. a motor powered by current. In another non-limiting aspect, said first actuator comprises a first gear box, operatively connected to said first electric motor. According to another non-limiting aspect, said first actuator comprises a transmission part, for example a chain or belt transmission, carried out by said first gear box for a motion transfer to said frame.

According to a non-limiting aspect, said at least one brush is a rotary brush configured for rotating around a second axis. According to another non-limiting aspect, said brush is provided with a rotary shaft having the rotation axis substantially coinciding with said second axis and configured for putting into rotation said brush. According to a non-limiting aspect, said second axis is perpendicular to the plane of said railway and/or platform, i.e. is a vertical axis.

According to a non-limiting aspect, the device comprises a second actuator associated with said support structure. According to this aspect, said second actuator is configured for putting into rotation said brush around the second rotation axis of the brush.

According to a non-limiting aspect, said second actuator is associated with said frame. According to another non-limiting aspect, said second actuator is mounted on said frame.

According to a non-limiting aspect, said second actuator comprises a second electric motor. According to another non-limiting aspect, said second actuator comprises a second gear box, operatively associated with said second electric motor. According to yet another non-limiting aspect, said second gear box is associated with, directly or indirectly by means of the interposition of known transmission parts, the shaft of said brush for putting it in rotation.

According to a non-limiting aspect, the cleaning device comprises a control system of the position of the at least one brush. Said control system is configured for modifying the position of said at least one brush.

According to another non-limiting aspect, said control system is operatively connected to said first actuator. According to this aspect, said control system is configured for controlling said first actuator for modifying the position of said frame, and consequently of said at least one brush.

According to a non-limiting aspect, the control system is operatively associated with a said second actuator. According to another non-limiting aspect, the control system is operatively associated to said second actuator for detecting at least a state parameter thereof.

According to another non-limiting aspect, said control system is configured for controlling said first actuator as a function of said at least a state parameter of said second actuator.

According to a non-limiting aspect, said at least a state parameter comprises one or more of the following parameters of the second actuator: absorbed energy, delivered torque, internal and/or external temperature, engine revolutions, running and/or idle times. According to a non-limiting aspect, the control system comprises a computerized control unit configured at least for controlling said first actuator. According to another aspect, said computerized control unit is configured at least for controlling said first actuator as a function of said at least a state parameter of said second actuator.

According to a non-limiting aspect, the control system comprises a first sensor operatively associated with said second actuator, said first sensor being configured for detecting said at least a state parameter of said second actuator. According to another non-limiting aspect, said first sensor is operatively connected to said computerized control unit for sending a signal representative of said state parameter detected by the second actuator.

According to a non-limiting aspect, when the second actuator comprises a second electric motor, said at least a state parameter is a function of a quantity of current absorbed by said second motor. Said first sensor comprises, then, a current absorption sensor. Said current absorption sensor is configured for detecting the current absorbed by the second electric motor or a quantity function of said absorbed current. According to another non-limiting aspect, said first sensor is configured for sending to said computerized control unit a signal representative of the current absorbed by the second actuator. According to a non-limiting aspect, the state parameter detected by said first sensor is the electric current absorbed by said second actuator.

In the present description, the terms “absorbed current”, “parameter of absorbed current”, “quantity of absorbed current”, “current absorption" are to be intended as synonyms of the same state parameter detected by first sensor. This state parameter is then set by the first sensor as signal representative of the state parameter, specifically as signal representative of the absorbed current.

According to a non-limiting aspect, said current absorption sensor is embedded in said second actuator, in particular in said second electric motor. Alternatively, according to another non-limiting aspect, said current absorption sensor is separated from said second actuator and is operatively connected, through appropriate wiring, to said second actuator, in particular to said second electric motor.

According to a non-limiting aspect, said computerized control unit is configured for receiving said signal representative of said state parameter and for controlling the action of the first actuator as a function of the signal received by the first sensor.

According to a non-limiting aspect, said computerized control unit is configured for controlling the action of the first actuator as a function of the signal representative of the absorbed current by the second actuator received by the first sensor.

According to a non-limiting aspect, said computerized control unit comprises a comparison module adapted to compare said signal representative of the absorbed current from the second actuator received from the first sensor with at least a threshold and to control the action of the first actuator as a function of said comparison. In particular, said comparison module is adapted to compare the parameter of absorbed current with a first threshold and a second threshold.

According to a non-limiting aspect, said computerized control unit is adapted to modify the position of said at least one brush as a function of said comparison carried out by said comparison module. In particular, said computerized control unit is adapted to control the first actuator for increasing the operating distance when the parameter of absorbed current is higher than said first threshold and for decreasing the operating distance when parameter of absorbed current is lower than said second threshold. Analogously, said computerized control unit is adapted to control the first actuator for increasing the angle between the frame and the dividing plane when the parameter of absorbed current is higher than said first threshold and for decreasing the angle between the frame and the dividing plane when the parameter of absorbed current is lower than said second threshold. In other words, the parameter of current absorption is representative of the stress to which is subjected the second electric motor in the movement of the brush. On the one hand, a too high current absorption, is indicative of a too excessive stress and thus an excessive penetration of the brush against the train. On the other hand, a modest current absorption is indicative of a too low stress and therefore an insufficient, or even void, incidence of the brush on the train. When the stress is excessive, the brush is moved away from the train, i.e. the operating distance is increased, to avoid scratches and/or collisions. When the motor is subjected to an insufficient stress, the brush is brought closer to the train, i.e. the operating distance is decreased, to ensure a more effective cleaning action.

According to a non-limiting aspect, said first threshold and second threshold have selectable values, i.e. modifiable and not fixed/predetermined. According to this non-limiting aspect, said computerized control unit comprises a communication module and said first and second threshold are remotely modifiable through a modification signal send to said communication module.

According to another non-limiting aspect, said control system of the position of the brush comprises at least a second sensor for the check of the non-operating configuration of the support structure. Said second check sensor is configured for monitoring the position of the support structure and, in particular, for detecting when the support structure is in said at least non-operating position or not. According to another non-limiting aspect, said second sensor is a magnetic sensor operatively connected to said frame for detecting a position thereof.

According to a non-limiting aspect, the control system comprises a second sensor for each non-operating position to be checked. According to another non-limiting aspect, the control system comprises a second check sensor of the first non-operating position and a second check sensor of the second non-operating position

According to another non-limiting aspect, said second sensor is operatively associated with said computerized control unit for sending a signal representative of the configuration of said support structure. According to another non-limiting aspect, said signal representative of the configuration of said support structure is a binary signal indicative of the configuration of the support structure that, then, takes on a value when the support structure is at least in said non-operating position to be checked and takes on otherwise a complementary value.

According to another non-limiting aspect, said computerized control unit is configured for controlling said second actuator as a function of said signal representative of the position of said support structure. According to another non-limiting aspect, said computerized control unit is configured for non-activating said second actuator when said second sensor detects that said support structure is in said first non-operating position or second nonoperating position. According to yet another non-limiting aspect, said computerized control unit is configured for activating said second actuator when said second sensor detects that said support structure is not in said first nonoperating position and second non-operating position, for example said support structure is in said first operating position or said second operating position.

According to a non-limiting aspect, said support portion comprises a base of contact with said platform and a part movable with respect to said base, said movable part being configurable in a washing position, wherein the support structure is configurable in at least said first operating position and said at least second operating position, and a maintenance/replacement position, wherein is possible to maintain/replace said at least one brush and/or said support structure.

According to a non-limiting aspect, said device comprises at least a stroke end stopper adapted to limit the movement of said support structure.

According to a non-limiting aspect, said at least a stroke end stopper is configured for limiting the movement of said support structure at said at least non-operating position.

According to a non-limiting aspect, said device comprises two stroke end stoppers configured, respectively, for limiting the movement of said support structure at said first non-operating position and said second nonoperating position.

According to a non-limiting aspect, said at least a stroke end stopper is associated with said support portion, i.e. said stroke end stopper is mounted on said support portion of the cleaning device.

According to another non-limiting aspect, said at least a second sensor is connected to said at least a stroke end stopper, preferably said second sensor is mounted on said stroke end stopper.

According to another aspect, the present disclosure refers to a method for cleaning a train along a railway.

According to an aspect, the method for cleaning comprises a step of arranging a cleaning device according to one or more of the previously introduced aspects. In particular, the suitable device comprises at least one brush and a support structure configurable between a first operating position and a second operating position. According to this aspect, said at least one brush is in a condition adapted to affect and clean said train both when the support structure is in said first operating position and when the support structure is in said second operating position According to this aspect, the at least one brush is at an operating distance of value selectable from said railway when the support structure is in said first operating position or second operating position.

According to another aspect, said cleaning method comprises a step of moving relative to each other said train and said device parallel to a longitudinal extension of said railway.

According to a non-limiting aspect, said step of moving provides for moving the train along said railway, maintaining the device still. In other words, according to this aspect, is the train to move with respect to said cleaning device, at first by approaching to the device than by coasting it until going beyond it.

Alternatively, according to a non-limiting aspect, said step of moving provides for moving the cleaning device parallel to the longitudinal extension of said railway, maintaining the train still. In other words, according to this aspect, is the cleaning device to move with respect to said train, at first by approaching and then by going along the whole extension of the train itself by contacting a surface thereof.

According to another non-limiting aspect, said step of moving provides for moving both the cleaning device and the train parallel to the longitudinal extension of said railway concordantly. In other words, according to this aspect, both the train and the device are in movement in said step of moving relative to each other said train and said cleaning device.

According to another aspect, the cleaning method comprises a step of configuring selectively said support structure in said first operating position when the train traverses said dividing plane passing from said second halfspace to said first half-space or in said second operating position when the train traverses said dividing plane passing from said second half-space to said first half-space. In other words, in said step of configuring selectively the support structure, the at least one brush is positioned in the half-space opposite with respect to the one from which the train approaches the cleaning device. The step of configuring selectively the support structure in the first or in the second operating position has the function to prepare the device to the cleaning with the at least one brush at the operating distance for contacting said train.

According to a non-limiting aspect, said step of configuring selectively said support structure provides for rotating said frame with respect to said support portion around a first axis. In other words, in said step, the frame carrying the brush is rotated around a rotation axis thereof until reaching the configuration selected according to the relative movement between the cleaning device and the train to be cleaned.

According to an aspect, the cleaning method comprises a step of cleaning the train through the contact between said at least one brush and a surface of said train. According to an aspect, during said step of cleaning, said brush maintains said first operating position or said second operating position configured during the step of configuring selectively said support structure. It should be noted that the maintenance of the first operating position or second operating position does not imply that the brush remains at a fixed and predetermined distance from the train. This aspect will become clearer below.

According to a non-limiting aspect, said step of cleaning the train provides for moving said at least one brush with an actuator at least when said support structure is in said first operating position or in said second operating position. According to a non-limiting aspect, said step of cleaning the train provides for moving said at least one brush with an actuator comprising at least an electric motor at least when said support structure is in said first operating position or in said second operating position. According to another aspect, said step of cleaning the train provides for rotating said brush around said second axis by means of said actuator, more in particular by means of the electric motor of the actuator

According to a non-limiting aspect, the cleaning method comprises a step of detecting at least a state parameter of said actuator during the step of cleaning. According to a non-limiting aspect, said at least a state parameter comprises one or more of the following parameters of the second actuator: absorbed energy, delivered torque, internal and/or external temperature, engine revolutions, running and/or idle times.

According to a non-limiting aspect, said state parameter comprises a quantity of absorbed current from the electric motor of the actuator and/or a relative function. According to this aspect, said step of detecting at least a state parameter provides for detecting a parameter of current absorption of said actuator or a relative function, when the actuator comprises at least an electric motor eventually provided with a gear box.

According to another non-limiting aspect, the cleaning method comprises a step of adapting the position of said at least one brush as a function of the at least a state parameter detected maintaining said at least one brush in the first operating position or in the second operating position configured during the step of configuring selectively said support structure. Specifically, in said step of adapting the position, the operating distance between the at least one brush and the railway is modified as a function of said state parameter of the actuator in charge of the movement of the brush itself.

According to another non-limiting aspect, the step of adapting the position of said at least one brush provides for varying an operating distance between said brush and said railway by rotating said frame with respect to said support portion around a first axis and by modifying an angle formed between said frame and said dividing plane. In other words, there is a relationship that connects the angle formed between the frame and dividing plane and the operating distance between the brush and the railway. Specifically, as the angle increases, the operating distance also increases. Vice versa, as the angle decreases, the operating distance also decreases.

According to another non-limiting aspect, the cleaning method comprises a preliminary step of check of the non-operating position of the support structure wherein the at least one brush is adapted to not affect and clean said train. This step has the purpose to check the actual configuration of the support structure. According to another non-limiting aspect, la preliminary step of checking provides for not moving said at least one brush with said second actuator when the support structure is in said at least non-operating position. According to yet another non-limiting aspect, the preliminary step of checking provides for not moving said at least one brush with said second actuator when the support structure is not in said at least non-operating position, for example when it is in said first operating position or second operating position.

According to another aspect, the present disclosure refers to a cleaning device for a train. Specifically, the present disclosure refers to a cleaning device for a train along a railway. This cleaning device is particularly adapted to be installed at a platform associated to said railway, for example for example in the context of a train washing station.

As already previously described, according to an aspect, said railway is constituted by a depressed area with respect to the platform. In this depressed area is housed a pair of rails developing along a longitudinal extension direction, that substantially coincides with the centerline of said pair of rails. Said depressed area is then configured for allowing the passage of the train and shows a width, measured between said main extension direction and the platform, so as to avoid the contact between the train and the platform itself from the side of the railway in which the platform is installed.

The device shares at least part of the aspects previously introduced and hereinafter will be described some of its salient aspects. It should be anyhow intended that the previously introduced aspects are applicable, where possible, also to the following cleaning device.

According to an aspect, said device comprises at least one brush. Said at least one brush is configured, in use, for cleaning a portion of a train by means of a mechanical action for removing dirt deriving from the contact between the brush and the surface of the train, eventually combined with the movement of the brush itself relative to said train portion.

According to a non-limiting aspect, during the use, the at least a brush is rotary.

According to an aspect, the device comprises a support structure configured for supporting said at least one brush, i.e. said support structure carries said brush.

According to an aspect, the support structure is connected to said platform. According to a non-limiting aspect, said support structure is anchored to said platform, i.e. said support structure cannot translate with respect to said platform. Alternatively, according to another non-limiting aspect, said support structure is connected in a movable way to said platform, i.e. said support structure can translate with respect to said platform, for example in direction parallel to the longitudinal extension direction of the railway, i.e. to the longitudinal extension direction of relative rails. According to an aspect, said support structure is at least partially movable, i.e. said support structure is not rigidly connected to the platform but at least a part thereof can translate and/or rotate with respect to a reference fixed element, such as the platform or the railway.

According to a non-limiting aspect, said support structure comprises a support portion and a frame movable with respect to said support portion. Said frame carries said at least one brush. According to a non-limiting aspect, said support portion is associated to said platform. According to another non-limiting aspect, said support portion is anchored to said platform.

According to an aspect, said support structure is configurable in at least an operating position. According to this aspect, when said support structure is in said at least an operating position, the at least one brush is at an operating distance with respect to said railway. According to an aspect, the operating distance is of selectable value, i.e. is of value variable at least in a range and is not fixed/predetermined. According to a non-limiting aspect, said operating distance is measured with respect to the longitudinal extension direction of said railway. According to another aspect, when it is at said operating distance with respect to said railway, the at least one brush is in a position adapted to affect and clean a train present on said railway. In other words when it is at a said operating distance from the railway, the at least one brush affects at least partially a space above said railway. According to another aspect, said operating distance is lower with respect to the width of the railway.

According to an aspect, the device comprises a first actuator operatively connected to said support structure. Said first actuator is configured for moving said support structure. According to a limiting aspect, said first actuator is configured for modifying said operating distance when said support structure is in said operating position.

According to a non-limiting aspect, said first actuator is associated with said support structure According to another non-limiting aspect, said first actuator is associated with said support portion of the support structure According to a non-limiting aspect, said first actuator is mounted on said support portion

According to an aspect, the device comprises a second actuator associated with said support structure. According to this aspect, said second actuator is operatively connected to said at least one brush for moving it at least when said support structure is in said operating position.

According to a non-limiting aspect, said at least one brush is a rotary brush configured for rotating around a second axis. According to another non-limiting aspect, said brush is provided with a rotary shaft having the rotation axis substantially coinciding with said second axis and configured for putting into rotation said brush. According to another non-limiting aspect, said second actuator is connected to said shaft for putting into rotation said shaft and for putting into rotation said at least one brush. According to yet another non-limiting aspect, said second axis is perpendicular to the plane of said railway and/or platform, i.e. is a vertical axis.

According to a non-limiting aspect, said second actuator is associated with said frame. According to another non-limiting aspect, said second actuator is mounted on said frame.

According to an aspect, the cleaning device comprises a control system of the position of the at least one brush. According to an aspect, said control system is configured for modifying at least said operating distance when the support structure is in said operating position.

According to an aspect, the control system is operatively associated with said second actuator. According to another non-limiting aspect, the control system is operatively associated to said second actuator for detecting at least a state parameter or a relative function. According to a non-limiting aspect, said at least a state parameter comprises one or more of the following parameters of the second actuator: absorbed energy, delivered torque, internal and/or external temperature, engine revolutions, running and/or idle times.

According to an aspect, the control system is configured for selecting the value of said operating distance as a function of said at least a detected state parameter. As it will be clearer hereinafter, on the basis of the detected state parameter, the control system selects a value of the operating distance, eventually in a range of the values assumable by said operating distance.

According to another aspect, said control system is operatively connected to said first actuator. According to this aspect, said control system is configured for controlling said first actuator and setting the value selected of the operating distance, and consequently modifying the position of said at least a brush. According to this aspect, said control system is configured for controlling said first actuator as a function of a state parameter of said second actuator in order to modify the operating distance of the brush with respect to the railway. As it will be clearer hereinafter, the control system implements then a retroaction mechanism that, according to the state of the second actuator in charge of the movement of the brush, modifies, by opportunely controlling the action of said first actuator, the position of the brush itself.

According to a non-limiting aspect, the control system comprises a first sensor operatively associated with said second actuator. In particular, said first sensor is configured for detecting said at least a state parameter of said second actuator.

According to another non-limiting aspect, the control system comprises a computerized control unit. According to this aspect, said computerized control unit is operatively connected to the first sensor and to the first actuator.

According to another non-limiting aspect, said first sensor is operatively connected to said computerized control unit for sending a signal representative of said state parameter of the second actuator.

According to a non-limiting aspect, said computerized unit is configured for selecting said value of the operating distance as a function of said signal representative of said state parameter of the second actuator. According to another non-limiting aspect, said computerized control unit is configured at least for controlling said first actuator and setting the value of said operating distance selected as a function of said signal representative of said state parameter.

According to a non-limiting aspect, said second actuator comprises a second electric motor. According to another non-limiting aspect, said second actuator comprises a second gear box, operatively associated with said second electric motor. According to yet another non-limiting aspect, said second gear box is associated with, directly or indirectly by means of the interposition of known transmission parts, the shaft of said brush for putting it in rotation.

According to a non-limiting aspect, said at least a state parameter comprises a quantity of absorbed current from said second electric motor or a relative function. According to a non-limiting aspect, said first sensor comprises a current absorption sensor. Said current absorption sensor is configured for detecting a quantity of absorbed current, or a function of said quantity, from the second actuator when comprises a second electric motor eventually associated with a second gear box. According to another non-limiting aspect, said first sensor is configured for sending to said computerized control unit a signal representative of the absorbed current from the second actuator. According to this aspect, the state parameter detected by said first sensor is the electric current absorbed by said second actuator.

According to a non-limiting aspect, said current absorption sensor is embedded in said second actuator, in particular in said second electric motor. Alternatively, according to another non-limiting aspect, said current absorption sensor is separated from said second actuator and is operatively connected, through appropriate wiring, to said second actuator, in particular to said second electric motor.

According to a non-limiting aspect, said computerized control unit is configured for receiving said signal representative of said state parameter, for selecting the value of said operating distance and for controlling the action of the first actuator as a function of the signal received by the first sensor. According to a non-limiting aspect, said computerized control unit is configured for controlling the action of the first actuator as a function of the signal representative of the absorbed current by the second actuator received by the first sensor.

According to a non-limiting aspect, said computerized control unit comprises a comparison module adapted to compare said signal representative of the absorbed current from the second actuator with at least a threshold and to control the action of the first actuator as a function of said comparison. In particular, said comparison module is adapted to compare the quantity of absorbed current with a first threshold and a second threshold.

According to a non-limiting aspect, said computerized control unit is adapted to select said operating distance, and subsequently to control said first actuator, as a function of said comparison carried out by said comparison module. In particular, said computerized control unit is configured for increasing the selected value of the operating distance when the parameter of absorbed current is higher than said first threshold and for decreasing the selected value of the operating distance when parameter of absorbed current is lower than said second threshold Consequently, said computerized control unit is adapted to control the first actuator for increasing the operating distance when the parameter of absorbed current is higher than said first threshold and for decreasing the operating distance when the parameter of absorbed current is lower than said second threshold. In other words, the parameter of current absorption is representative of the stress to which is subjected the second actuator in the movement of the brush. On the one hand, a too high current absorption, is indicative of a too excessive stress and thus an excessive penetration of the brush against the train. On the other hand, a modest current absorption is indicative of a too low stress and therefore an insufficient, or even void, incidence of the brush on the train. When the stress is excessive, the brush is moved away from the train, i.e. the operating distance is increased, to avoid scratches and/or collisions. When the motor is subjected to an insufficient stress, the brush is brought closer to the train, i.e. the operating distance is decreased, to ensure a more effective cleaning action.

According to a non-limiting aspect, said first threshold and second threshold have selectable values, i.e. not fixed and predetermined. According to this non-limiting aspect, said computerized control unit comprises a communication module and said first and second threshold are remotely modifiable through a modification signal send to said communication module.

According to a non-limiting aspect, said first actuator comprises a first electric motor. In another non-limiting aspect, said first actuator comprises a first gear box, operatively connected to said first electric motor. According to another non-limiting aspect, said first actuator comprises a transmission part, for example a chain or belt transmission, carried out by said first gear box for a motion transfer to said frame. According to another non-limiting aspect, said computerized control unit is operatively connected to said first actuator for activating, as a function of said signal received from the first sensor, said first electric motor and setting the selected value of the operating distance.

According to a non-limiting aspect, said support portion is affected by a vertical dividing plane and substantially perpendicular to a longitudinal extension of said railway. In other words, said dividing plane is secant, i.e. traversing, said support portion. According to this aspect, said dividing plane defines a first half-space and a second halfspace, each one affecting part of said support portion.

According to another aspect, said support structure is configurable in at least a first operating position and a second operating position. According to a non-limiting aspect, when said support structure is in said first operating position or said second operating position, the at least one brush is at the operating distance with respect to said railway. According to this aspect, then, both in said first operating position and in said second operating position, the at least one brush is in a position such as to affect and clean a train eventually present on said railway, i.e. the at least one brush affects at least partially a space above said railway.

According to another non-limiting aspect, the at least one brush is contained in said first half-space when said support structure is configured in said first operating position and in said second half-space when said support structure is configured in said second operating position.

According to a non-limiting aspect, said support structure is, furthermore, configurable in at least a nonoperating position. According to this aspect, said at least a non-operating position is a position wherein said at least one brush is adapted to not affect said train portion eventually present on the railway. Specifically, when said support structure is in said non-operating position, said at least one brush is at a distance with respect to nonoperating with respect to said railway adapted to not affect and clean said train. In other words, when the support structure is in said at least a non-operating position, the at least one brush does not affect the space above said railway. According to an aspect, said non-operating distance is higher of said operating distance and said nonoperating distance is higher than the width of the railway.

According to a non-limiting aspect, said support structure is configurable in at least a first non-operating position and/or a second non-operating position. According to another non-limiting aspect, the at least one brush is contained in said first half-space when said support structure is configured in said first non-operating position and in said second half-space when said support structure is configured in said second non-operating position.

According to a non-limiting aspect, said first non-operating position and said second non-operating position are mirrored with respect to the dividing plane.

According to a non-limiting aspect, the frame is configured for rotating with respect to said support portion around a first axis. According to another non-limiting aspect, said first axis lies in said dividing plane. According to another non-limiting aspect, said frame is pivoted on said support portion for rotating around said first axis. In this configuration of the support structure, the frame forms with the dividing plane an angle measurable on a plane perpendicular to the first axis. According to the configuration taken on by the support structure, said angle is formed in said first half-space or in said second half-space.

According to a non-limiting aspect, the frame spaces an angle of 180° around said first axis passing from said first non-operating position to said second non-operating position or vice versa. According to another non-limiting aspect, in said first non-operating position, said frame and said dividing plane form in said first half-space an angle substantially equal to 90°.

According to a non-limiting aspect, when said frame is in the first non-operating position, said at least one brush is at the maximum distance with respect to said railway, coinciding, precisely, with the non-operating distance. Specifically, when the support structure is in the first non-operating position, the support frame is oriented in a substantially parallel way with respect to the extension direction of said railway, i.e. to the direction of rails of the railway itself.

According to a non-limiting aspect, said first operating position is interposed between said first non-operating position and said dividing plane, i.e. said first operating position represents at least part of the positions that the frame can take on by rotating around said first axis from said first non-operating position to said dividing plane or vice versa.

According to a non-limiting aspect, when said support structure is in said first operating position, said frame and said dividing plane form in said first half-space an angle comprised between 10° and 80°, preferably comprised between 20° and 70°, even more preferably comprised between 30° and 60°.

According to another non-limiting aspect, in said second non-operating position, said frame and said dividing plane form in said second half-space an angle substantially equal to 90°.

According to a non-limiting aspect, when said support structure is in the second non-operating position, said at least one brush is at the maximum distance with respect to said railway, coinciding, precisely, with said nonoperating distance. Specifically, when the support structure is in the second non-operating position, the support frame is oriented in a substantially parallel way with respect to the extension direction of said railway, i e. to the direction of rails of the railway itself.

According to a non-limiting aspect, said second operating position is interposed between said second nonoperating position and said dividing plane, i.e. said second operating position represents at least part of the positions that the frame can take on by rotating around said first axis from said second non-operating position to said dividing plane.

According to a non-limiting aspect, when the support structure is in said second operating position, said frame and said dividing plane form in said second half-space an angle comprised between 10° and 80°, preferably comprised between 20° and 70°, even more preferably comprised between 30° and 60°.

According to another non-limiting aspect, said control system of the position of the brush comprises at least a second check sensor of the non-operating configuration of the support structure. According to another non-limiting aspect, said second sensor is a magnetic sensor operatively connected to said frame for detecting a position thereof.

According to a non-limiting aspect, the control system comprises a second sensor for each non-operating position to be checked. According to another non-limiting aspect, the control system comprises a second check sensor of the first non-operating position and a second check sensor of the second non-operating position.

According to another non-limiting aspect, said second sensor is operatively associated with said computerized control unit for sending a signal representative of the position of said support structure. According to another nonlimiting aspect, said signal representative of the position of said support structure is a binary signal indicative of the position of the support structure that, then, takes on a value when the support structure is at least in said nonoperating position to be checked and takes on otherwise the complementary value.

According to another non-limiting aspect, said computerized control unit is configured for controlling said second actuator as a function of said signal representative of the position of said support structure. According to another non-limiting aspect, said computerized control unit is configured for non-activating said second actuator when said second sensor detects that said support structure is in said non-operating position. According to yet another non-limiting aspect, said computerized control unit is configured for activating said second actuator when said second sensor detects that said support structure is not in said non-operating position, for example said support structure is in said at least an operating position.

According to another non-limiting aspect, the present disclosure refers to a cleaning method of a train along a railway. This cleaning method shares at least part of the aspects previously introduced and hereinafter will be described some of its salient aspects. It should be anyhow intended that the previously introduced aspects are applicable, where possible, also to the present cleaning method.

According to an aspect, the cleaning method comprises a step of arranging a cleaning device comprising at least the following elements:

- at least one brush configured for affecting and cleaning a portion of said train;

- a support structure at least partially movable and carrying said at least one brush, this support structure being configurable in at least an operating position wherein said at least one brush is at an operating distance, of selectable value, with respect to said railway and wherein said at least one brush is adapted to affect and clean said train;

- an actuator configured for moving said at least one brush.

According to a non-limiting aspect, said step of arranging a cleaning device provides that said actuator comprises an electric motor, i.e. a motor powered by current.

According to another non-limiting aspect, said cleaning method comprises a step of moving relative to each other said train and said device parallel to a longitudinal extension of said railway.

According to a non-limiting aspect, said step of moving provides for moving the train along said railway, maintaining the device still. In other words, according to this aspect, is the train to move with respect to said cleaning device, at first by approaching to the device than by coasting it until going beyond it.

Alternatively, according to a non-limiting aspect, said step of moving provides for moving the cleaning device parallel to the longitudinal extension of said railway, maintaining the train still. In other words, according to this aspect, is the cleaning device to move with respect to said train, at first by approaching and then by going along the whole extension of the train itself by contacting a surface thereof.

According to another non-limiting aspect, said step of moving provides for moving both the cleaning device and the train parallel to the longitudinal extension of said railway concordantly. In other words, according to this aspect, both the train and the device are in movement in said step of moving relative to each other said train and said cleaning device. According to another non-limiting aspect, the cleaning method comprises a step of configuring said support structure in said operating position. The step of configuring the support structure in the operating position has the function of preparing the device to the cleaning with the at least one brush at the operating distance adapted to contact said train.

According to an aspect, the cleaning method comprises a step of cleaning the train through the contact between said at least one brush and a surface of said train. According to an aspect, during said step of cleaning, said brush maintains said operating position configured during the step of configuring said support structure. According to another aspect, said step of cleaning the train provides for moving said at least one brush with said actuator. According to a non-limiting aspect, said step of cleaning the train provides for moving said at least one brush with an actuator comprising at least an electric motor at least when said support structure is in said operating position.

According to an aspect, the cleaning method comprises a step of detecting at least a state parameter of said actuator during the step of cleaning. According to a non-limiting aspect, said at least a state parameter comprises one or more of the following parameters of the second actuator: absorbed energy, delivered torque, internal and/or external temperature, engine revolutions, running and/or idle times. According to a non-limiting aspect, when the actuator comprises at least an electric motor eventually provided with a gear box, said state parameter comprises a quantity of absorbed current from the electric motor of the actuator and/or a relative function.

According to another non-limiting aspect, the cleaning method comprises a step of adapting the operating distance between one brush and the railway as a function of said at least a state parameter of said actuator maintaining said at least one brush in the operating position configured during the step of configuring said support structure. According to a non-limiting aspect, when said step of detecting at least a state parameter provides for detecting a parameter of current absorption, the step of adapting the operating distance provides for increasing the operating distance when said quantity of absorbed current is higher than a first threshold and for decreasing the operating distance when said quantity of absorbed current is lower than a second threshold. According to another non-limiting aspect, said first threshold and second threshold have preferably selectable values.

According to another non-limiting aspect, the cleaning method comprises a preliminary step of checking of the position of the support structure. According to another non-limiting aspect, the preliminary step of checking provides for not moving said at least one brush with said actuator when the support structure is in said non-operating position. According to yet another non-limiting aspect, the preliminary step of checking provides moving said at least one brush with said actuator when the support structure is not in said non-operating position, for example said support structure is in said operating position.

Figures

The invention will be hereinafter described with reference to the attached figures, which concern a specific non-limiting embodiment of cleaning device for a train along a railway and of the method for cleaning a train according to the present disclosure. A short description of the figures is given hereinafter.

Figure 1 shows a perspective view of a cleaning device for a train along a railway according to the present invention according to a first embodiment wherein the brush is in an operating position for cleaning a train. Figure 1A shows the cleaning device of which in figure 1 according to a plane view from the top. Figure 2 shows a perspective view of a cleaning device for a train along a railway according to the present invention according to a second embodiment wherein the brush is in an operating position for cleaning a train. Figure 2A shows the cleaning device of which in figure 2 according to a plane view from the top.

Figure 3 shows a perspective view of a cleaning device for a train along a railway according to the present invention according to a third embodiment wherein the brush is in a non-operating position. Figure 3A shows the cleaning device of which in figure 3 according to a plane view from the top.

Figure 4 shows a perspective view of a cleaning device for a train along a railway according to the present invention according to a fourth embodiment wherein the brush is in a non-operating position. Figure 4A shows the cleaning device of which in figure 4 according to a plane view from the top.

Figure 5 shows a perspective view of a detail of the support structure and of the movement elements of the structure and of the brush of the cleaning device, with some elements at least partially removed for higher clarity.

Figure 6 shows a rear plane view of the cleaning device of figure 3 with some elements removed for higher clarity.

Figure 7 shows a block diagram showing the connections to some elements of the cleaning device for a train according to the present invention.

Figure 8 shows a cleaning method for a train according to the present invention according to a first embodiment.

Detailed description

With reference to the attached figures, with reference number 1 is indicated in its whole a cleaning device for a train, hereinafter indicated with device 1 for easiness. Specifically, the device 1 is conceived with the purpose of being installed at a platform 11 associated to a railway 10 for cleaning a surface of at least one among a locomotive, a railcar, a passenger car or a goods wagon of a train destined to move on said railway 10

In the attached figures it is shown a single-track railway 10, which comprises two steel metallic guides, denominated rails or tracks parallel between them in a longitudinal extension direction X of the railway 10, that substantially coincides with the centerline of said pair of rails. These metallic guides are maintained parallel between them by fixing them with sleepers, for example of wood, or of prestressed concrete, through track bolts.

Typically, the railway 10 is provided with an electrified line, not shown, positioned at a predetermined height with respect to the tracks, and which is supported by an insulating supporting post. The electrified line is destined to allow the supply of a locomotive or of a railcar of the train, which receives electrical power through an extensible pantograph which during use enters into contact with the electrified line transferring electrical power to batteries and/or to an electric motor. Said electrified line is at a height higher with respect to the maximum height reached by the device 1 object of the present disclosure. The difference between the height at which lies the electrified line and the maximum height reached by the device 1 is colloquially said “clearance”.

On the sides of the railway 10 is arranged the platform 11 , also said “platform”. This platform 11 lies on a plane raised and parallel with respect to the plane of the railway 10. As shown in the attached figures, the platform 11 represents the basement on which lies the device 1.

As shown in the attached figures, said railway 10 is constituted by a depressed area with respect to the platform 11. In this depressed area is housed the pair of rails that develops along the longitudinal extension direction X. Said depressed area is then configured for allowing the passage of the train and shows a width W, measured between said main extension direction X and the platform 11, so as to avoid the contact between the train and the platform itself.

With reference to figure 1 it should be observed that the device 1 here described comprises at least one brush 2, specifically a single brush 2, configured for cleaning a train portion by means of a mechanical action for removing dirt deriving from its movement relative to the predetermined train portion.

The brush 2 is realized through a plurality of bristles and/or blades and/or strips and/or fibers strips of a material suitable for the cleaning of the train, preferably a plastic material; these bristles and/or blades and/or strips and/or fibers in rest condition are inclined downwards.

In an embodiment, the brush 2 is at least partially cylindrical. In particular, in the embodiment shown in the attached figures, the brush 2 has a first cylindrical portion and a second portion having a diameter gradually increasing with the increase of the height. The second portion lies above the first portion. The Applicant has preferred the use of this embodiment considering the substantially tapered shape that locomotives and cars have in the upper portion with respect to the bottom portion in substantial proximity of carriages. However, other embodiments of the brush, for example with truncated cone, are anyhow admitted.

In the shown embodiment, the brush 2 is a rotary brush and comprises a shaft 21 , arranged substantially along a vertical direction and on which the brush is worn. This shaft 21 is configured for rotating around said vertical direction and for putting in rotation the brush 2, under the effect of external forces will be clearer hereinafter in the present description By effect of the rotation of the shaft 21 , in use, the brush expands, because the fibers align along a direction substantially orthogonal with respect to the direction of rotation of the shaft 21 due to the centrifugal force deriving from the rotation. In use, the bristles enter in contact with a portion of the train, exerting a mechanical action on this surface enough for removing the dirt.

The device 1 comprises, furthermore, a support structure 3 configured for supporting said brush 2. Said support structure 3 is connected to the platform 11 . In the shown embodiment, the support structure 3 is anchored to said platform 11 , i.e. it cannot translate with respect to said platform 11 . According to other embodiments, said support structure 3 is connected in a movable way to said platform 11, i.e. said support structure can translate with respect to said platform, for example in direction parallel to the longitudinal extension direction X of the railway 10.

Said support structure 3 is at least partially mobile. Specifically, the support structure 3 comprises a support portion 31 and a frame 32 movable with respect to said support portion 31 . This frame 32 is connected to said brush 2 and carries the brush itself. As shown, the support portion 31 is portion of connection with the platform 11 , more in particular is the portion anchored to the platform 11. In the shown embodiment, the support portion 31 takes on the shape of a column or a pillar. However, other embodiments are to be considered as included, such as for example a base at least partially drowned in the platform 11 .

As shown in the attached figures, the support portion 31 is affected by a dividing vertical plane P and substantially perpendicular to the longitudinal extension X of said railway 10. As shown, said dividing plane P is secant, i.e. traversing, said support portion 31. As already specified, in the present disclosure, with the term “vertical” is intended a direction orthogonal to a plane on which lies the platform 11 and/or the railway 10, i.e. a direction orthogonal to the plane of figures 1A, 2A, 3A and 4A. This dividing plane P defines a first half-space SP1 and a second half-space SP2, each one contains part of said support portion 31. As shown for example in figure 1, the dividing plane P divides the space wherein is installed the device 1 in two different half-spaces: these different half-spaces are shown, precisely, by said first half-space SP1 and said second half-space SP2.

In the shown embodiment, the support portion 31 comprises a base 311 of contact with said platform 11 and a movable part or movable column 312 with respect to said base 311. The movable part 312 is configurable in a washing position, shown in the attached figures wherein the brush 2 is substantially vertical, and a position of maintenance/replacement, not shown and wherein the brush 2 is near the plane of the railway/platform for allowing a maintenance/replacement of the brush 2 o of the support structure 3. As better shown in figure 5, the movable part 312 is pivoted on said base 311 for allowing a rotation around an axis of rotation R.

In the shown embodiment, the frame 32 comprises a first arm 321 and a second arm 322, substantially parallel between them and configure for bringing said brush 2, by contacting it at the ends of said shaft 21 . Said frame 32 comprises, furthermore, a running board 323, interposed between said first arm 321 and second arm 322 to form a substantially "C”-shaped structure. This running board 323 is connected to said support portion 31.

In the shown embodiment, the frame 32 is pivoted on said support portion 31 for rotating around the first axis Y1, preferably lying in said dividing plane P. In this embodiment, the support portion 31, is more in particular the movable part 312, has two flanges 313, one of which is shown more in detail in figure 5, which allow the connection with the frame 32. These flanges are, preferably, opportunely greaseable and has installed some bearings (exemplarily of thrust type) capable of reducing a sliding friction that, given the relevant weight of the brush 2 and of the frame 32, develops during the movement of said frame 32 with respect to the support portion 31. Said flanges 313 are aligned along said first axis Y1 and have, each one, a hole, preferably a circular hole, for the insertion and the housing, in axial direction along the first axis Y1, of a pin 324 with which is provided the running board 323 of the frame 32.

As shown in figures 1-1 A and 2-2A, said support structure 3 is configurable in at least a first operating position OP1 (figure 1 and 1A) and a second operating position OP2 (figure 2 and 2A). as more clearly shown in figures 1A and 2A, the brush 2 carried by the frame 32 is contained in said first half-space SP1 when said support structure 3 is in said first operating position OP1 and in said second half-space SP2 when said support structure 3 is in said second operating position OP2. More in detail, said frame 32 is mainly contained in a first half-space SP1 when said support structure 3 is configured in said first operating position OP1 and is mainly contained in a second halfspace SP2 when said support structure 3 is configured in said second operating position OP2. In the present document, with the term "mainly” is intended the most part of an element, for example more than 80% of this element.

In particular, when the support structure 3 is in said first operating position OP1 and second operating position OP2, the brush 2 is at an operating distance D from said railway 10. Specifically, said operating distance D is of selectable value, i.e. variable and not fixed/predetermined. As shown in figures 1-1 A and 2-2A, said operating distance D is measured between the axis of the shaft 21 of the brush 2 and the axis of longitudinal extension X of the railway 10. Specifically, said operating distance D is lower with respect to the width W of the railway 10. It is, furthermore, noted that said operating distance D is selectable, i.e. is variable and not fixed/predetermined. Figures 1 A and 2A show with more details that, when the support structure 3 is at the operating distance D in said first operating position 0P1 or in said second operating position 0P2, the brush 2 is in a condition adapted to clean a train, i.e. a position wherein said brush 2 affects at least part of the space above the railway 10. In other words, when the support structure 3 is in said first operating position OP1 or said second operating position OP2, the brush 2 is adapted to affect a train portion eventually present along the railway 10, because said operating distance D is such to ensure the contact between the brush 2 and the surface of the train to be cleaned.

The support structure 3 is, furthermore, configurable in at least a non-operating position, wherein said brush 2 is adapted to not affect a train. In particular, in the shown embodiment, the support structure 3 is configurable in at least a first non-operating position NOP1 (figure 3 and 3A) and a second non-operating position NOP2 (figure 4 and 4A). As more clearly shown in figures 3A and 4A, the brush 2 carried by the frame 32 is contained in said first half-space SP1 when said support structure 3 is in said first non-operating position NOP1 and in said second halfspace SP2 when said support structure 3 is in said second non-operating position NOP2. More in detail, said frame 32 is mainly contained in a first half-space SP1 when said support structure 3 is configured in said first non-operating position NOP1 and is mainly contained in a second half-space SP2 when said support structure 3 is configured in said second non-operating position NOP2.

In particular, when the support structure 3 is in said first non-operating position NOP1 or said second nonoperating position NOP2, the brush 2 is at a non-operating distance N from said railway 10. As said for the operating distance D, also said non-operating distance N is measured between the axis of the shaft 21 of the brush 2 and the axis of longitudinal extension X of the railway 10 Specifically, said non-operating distance N is higher with respect to the width W of the railway 10.

Always figures 3A and 4A show with more details that, when the support structure 3 is in said first nonoperating position NOP1 or in said second non-operating position NOP2, the brush 2 is in a condition adapted not to clean a train, i.e. a position wherein said brush 2 does not affect the space above the railway 10. In other words, when the brush 2 is at said non-operating distance N from the railway 10, it affects mainly a space above the platform 11 on which the device 1 is installed and not the space above the railway 10. In this way it is avoided the contact between the brush 2 and surface of a train eventually present on said railway 10. As clear from a comparison between figures 1-2A and 3-4A, said non-operating distance N is higher than the width W of the railway and, thus, also than said operating distance D.

From a comparison between figures 3-3A and 4-4A is possible to observe that, in the shown embodiment, said first non-operating position NOP1 and second non-operating position NOP2 are mirrored with respect to the dividing plane P. More in particular, the frame 32 spaces an angle of 180° around said first axis Y1 passing from said first non-operating position NOP1 to said second non-operating position NOP2 or vice versa.

As shown in figure 3A, in said first non-operating position NOP1 , said frame 32 and said dividing plane P form in said first half-space SP1 an angle A substantially equal to 90°. This angle A, such as the other angles described hereinafter, are measured in a plane orthogonal to said first axis Y1 , i.e. in a plane coinciding with the plane of figures 1A, 2A, 3A and 4A. When the support structure 3 is in the first non-operating position NOP1 , said brush 2 is at the maximum distance with respect to said railway 10, corresponding to the non-operating distance N. Specifically, when is in the first non-operating position N0P1, the frame 32 is oriented in a substantially parallel way with respect to the extension direction X of said railway 10.

From a comparison between figures 1 -1 A and 3-3A it is possible to observe how said first operating position OP1 is interposed between said first non-operating position NOP1 and said dividing plane P, i.e. said first operating position OP1 represents at least part of the positions that the frame 32 can take on by rotating around said first axis Y1 from said first non-operating position NOP1 to said dividing plane P or vice versa.

In the configuration shown in figure 1 -1 A, said frame 32 and said dividing plane P form in said first half-space SP1 an angle substantially equal to 45°. More generally, when is in said first operating position OP1, said frame 32 and said dividing plane P form in said first half-space SP1 an angle A comprised between 10° and 80°, preferably comprised between 20° and 70°, even more preferably comprised between 30° and 60°.

It should be noted that, when the support structure 3 is in said first operating position OP1, there is a direct relationship between the operating distance D and the angle A formed between the frame 32 and the dividing plane P. To a variation of said angle A corresponds a variation of the operating distance D. More in particular, as the angle A increases the operating distance D increases and, vice versa, as the angle A decreases the operating distance D decreases.

As shown in figure 4A, in said second non-operating position NOP1 , said frame 32 and said dividing plane P form in said second half-space SP2 an angle A substantially equal to 90°.

When the support structure 3 is in the second non-operating position NOP2, said brush 2 is at the maximum distance with respect to said railway 10, corresponding to the non-operating distance N. Specifically, when is in the second non-operating position NOP2, the frame 32 is oriented in a substantially parallel way with respect to the extension direction X of said railway 10.

From a comparison between figures 2-2A and 4-4A it is possible to observe how said second operating position OP2 is interposed between said second non-operating position NOP2 and said dividing plane P, i.e. said second operating position OP2 represents at least part of the positions that the frame 32 can take on by rotating around said first axis Y1 from said second non-operating position NOP2 to said dividing plane P or vice versa.

In the configuration shown in figure 2-2A, said frame 32 and said dividing plane P form in said second halfspace SP2 an angle substantially equal to 45°. More generally, when is in said second operating position OP2, said frame 32 and said dividing plane P form in said second half-space SP2 an angle A comprised between 10° and 80°, preferably comprised between 20° and 70°, even more preferably comprised between 30° and 60°.

It should be noted that, when the support structure 3 is in said second operating position OP2, there is a direct relationship between the operating distance D and the angle A formed between the frame 32 and the dividing plane P. To a variation of said angle A corresponds a variation of the operating distance D. More in particular, as the angle A increases the operating distance D increases and, vice versa, as the angle A decreases the operating distance D decreases.

As shown in the attached figures and more in detail in figures 5 and 6, said device 1 comprises a first actuator 4. Said first actuator 4 is operatively connected to said frame 32 and is configured for moving said frame 32, i.e. for varying the angle A between the frame 32 and the dividing plane P, and thus the operating distance D, in the shown embodiment. As better shown in figure 5, said first actuator 4 is associated with said support structure 3, preferably with said support portion 31. In other words, said first actuator 4 is mounted on said support portion 31 .

In particular, in the embodiment of the attached figures, the first actuator 4 comprises a first electric motor 41 and a first gear box 42, operatively connected to said first electric motor 41. The first actuator 4 comprises furthermore a transmission part 43, shown in figure 5 as comprising at least a chain, for transferring to the frame 32 the rotary motion provided by said electric motor 41 and modulated by said gear box 42.

The device 1 comprises also a second actuator 5 associated with said support structure 3. This second actuator 5 is configured for putting in rotation the brush 2, and in particular the shaft 21, around a second axis of rotation Y2. This second axis Y2 coincides substantially, in use, with the vertical axis of rotation of the brush 2.

As shown in the attached figures, the second actuator 5 is associated with said frame 32 and, in particular, is contained in an appropriate carter associated with the second arm 322 of the frame, substantially at a connection point between the second arm 322 and the shaft 21 of the brush 2.

In figure 5 is shown more in detail the second actuator 5. In this figure it can be noticed how the second actuator 5 comprises a second electric motor 51 and a second gear box 52, operatively associated with said second electric motor 51. This second gear box 52 is associated with said shaft 21 for putting in rotation the brush 2. In other words, the shaft 21 is geared, directly or indirectly by means of interposition of other transmission parts of known type, on said second gear box 52.

The device 1 comprises, furthermore, a control system 6 of the position of the brush 2, schematically shown in figure 7. As it will be clearer hereinafter, the control system 6 is configured for modifying the position of the brush 2 and/or for modifying the configuration of the support structure 3. More specifically, the control system 6 is configured for adapting the position of the brush 2 and/or the configuration of the support structure 3 as a function of the state of other components of the device 1. In figure 7 are represented with solid lines the physical connections between the elements of the device 1 and with dotted lines the electrical and/or signal transmission connections internal and external to the control system 6. It should be noted that the electrical and/or signal transmission connections can be wired or wireless, i.e. without wires.

Firstly, said control system 6 is operatively connected to said first actuator 4. In particular, said control system 6 is configured for controlling said first actuator 4 and modifying the position of said frame 32, and consequently of said brush 2. In the shown embodiment, the control system 6 is configured for controlling said first actuator 4 for modifying said angle A the frame 32 and the dividing plane P.

It should be noted that a modification of the angle A can correspond both to a change of the configuration of the support structure 3, for example from said first operating position 0P1 to said first non-operating position NOP1 or to said second position 0P2, and to a variation of the angle A maintaining the configuration of the support structure 3, for example a variation of the angle A in said first operating position 0P1 and thus a modification of the operating distance D. In fact, when said support structure 3 is in said first operating position 0P1 or second operating position 0P2, the angle A affects the operating distance D and consequently the action that the brush 2 exerts on the surface of the train to be cleaned. A too wide angle A can involve an inefficient cleaning action due to the insufficient or even lacking contact between the bristles of the brush 2 and the surface of the train. A too narrow angle A can involve a too intense contact between the brush 2 and the surface of the train which could result, on the one hand, in damages (e.g. scratches) to the surface of the train and, on the other hand, in damages to the device 1 , such as excessive and premature wear of the bristles of the brush 2, excessive stress of the second actuator 5 or damages to the structure as a result of the impact with protruding portions of the train. According to this aspect, the control system 6 is configured for selecting the value of the operating distance D. The control system 6 is, furthermore, configured for controlling said first actuator 5 so as to set the value of the operating distance D selected.

According to what is shown in figure 7, the control system 6 is operatively associated with a said second actuator 5. In particular, said control system 6 is configured for selecting the value of the operating distance D, and subsequently of the control said first actuator 5, as a function of a state parameter of said second actuator 4.

As shown in figure 7, the control system 6 comprises a first sensor 61 operatively associated with said second actuator 5 and a computerized control unit 62 operatively connected to said first sensor 61. Specifically, said first sensor 61 is configured for controlling at least a state parameter of said second actuator 5. Preferably, said at least a state parameter comprises one or more of the following parameters of the second actuator: absorbed energy, delivered torque, internal and/or external temperature, engine revolutions, running and/or idle times.

Furthermore, the first sensor 61 is operatively connected to said computerized control unit 62 for sending a signal representative of the state parameter detected by the second actuator 5. The computerized unit 62 is configured for selecting the value of the operating distance D as a function of the signal received from said first sensor 61. The computerized unit 62 is operatively connected to the first actuator 4 and is configured for controlling said first actuator 4 as a function of the operating distance D selected In other words, the computerized unit 62 receives from said first sensor 61 the signal representative of the state parameter of the second actuator 5, selected the value of the operating distance D as a function of the signal received and controls the first actuator 4 for setting said operating distance D selected. The control system 6 implements then a retroaction mechanism that, according to the state of the second actuator 5 in charge of the movement of the brush 2, modifies, by opportunely controlling the action of said first actuator 4, the operating distance D of the brush itself.

In the shown embodiment, said state parameter comprises a quantity of absorbed current from the second actuator 5 or a relative function. In this embodiment, said first sensor 61 is a current absorption sensor. Said current absorption sensor is configured for detecting the quantity of absorbed current from the second electric motor 51 associated with the second gear box 52. Specifically, said first sensor 61 is configured for sending to said computerized unit 62 a signal representative of the quantity of absorbed current from the second electric motor 51 .

In the shown embodiment in particular in figure 5, said first sensor 61 of current absorption is embedded in said second actuator 5, in particular in said second electric motor 51. Alternatively, according to other not shown embodiments, said first sensor 61 of current absorption is separated from said second actuator 5 and is operatively connected, for example through appropriate wirings, to said second actuator 5, in particular to said second electric motor 51.

Thus, said computerized unit 62 is configured for selecting the operating distance D and subsequently controlling the action of the first actuator 4 as a function of the signal representative of the quantity of absorbed current from the second actuator 5 received by the first current absorption sensor 61. As a function of said signal, the computerized unit 62 controls the first actuator 4 so that the angle A between the frame 32 and the dividing plane P is varied and thus the selected operating distance D is set.

In the embodiment here described, said computerized unit 62 comprises preferably a comparison module adapted to compare said signal representative of the quantity of absorbed current by the second actuator 5 received from the first sensor 61 with at least a threshold. In particular, said comparison module is adapted to compare the quantity of absorbed current with a first threshold and a second threshold. According to a non-limiting aspect, said computerized unit 62 is adapted to select said operating distance D, and subsequently to control said first actuator 4, as a function of comparison carried out by said comparison module. In particular, said computerized unit 62 is configured for increasing the operating distance D when the quantity of absorbed current is higher than said first threshold and for decreasing the operating distance D when the quantity of absorbed current is lower than said second threshold. Consequently, said computerized unit 62 is adapted to control the first actuator 4 for increasing or decreasing the operating distance D as a function of the comparison between the quantity of absorbed current and said first and second threshold. In other words, the parameter of current absorption is representative of the stress to which is subjected the second electric motor 51 in the movement of the brush. On the one hand, a too high current absorption, is indicative of a too excessive stress and thus an excessive penetration of the brush 2 against the train. On the other hand, a modest current absorption is indicative of a too low stress and therefore an insufficient, or even void, incidence of the brush 2 on the train. When the stress is excessive, the brush 2 is moved away from the train, i.e. the operating distance D is increased, to avoid scratches and/or collisions. When the second electric motor 51 is subjected to an insufficient stress, the brush 2 is brought closer to the train, i.e. the operating distance D is decreased, to ensure a more effective cleaning action.

According to a non-limiting aspect, said first threshold and second threshold have selectable values, i.e. not fixed and predetermined. According to this non-limiting aspect, said computerized unit 62 comprises a communication module and said first threshold and second threshold are remotely modifiable through a modification signal send to said communication module.

According to what is shown in figure 7, the control system 6 of the position of the brush comprises at least a second sensor 63 for the check of the non-operating configuration NOP1 , NOP2 of the support structure 3. In the embodiment of the attached figures, said at least a second sensor 62 for the check is a magnetic sensor operatively connected to said frame for detecting a position thereof.

Preferably, the control system 6 comprises a second sensor 63 for each non-operating position NOP1, NOP2 to be checked. In the shown embodiment, thus, the control system 6 comprises a second sensor 63 for the check of the first non-operating position NOP1 and a second sensor 63 for the check of the second non-operating position NOP2.

As shown in figure 7, the check sensor 63 is operatively associated with said computerized unit 62 for sending a signal representative of the position of said support structure 3. Specifically, said signal representative of the position of said support structure 3 is a binary signal indicative of the position of the support structure that, then, takes on a value when the support structure 3 is in the non-operating position to be checked and takes on otherwise the complementary value. According to an embodiment, the computerized unit 62 is configured for activating said second actuator 5 as a function of said signal representative of the position of said support structure 3. In particular, said computerized unit 62 is configured for non-activating the second actuator 5 when said second sensor 63 detects that said support structure 3 is in said first non-operating position N0P1 or second non-operating position NOP2. Similarly, said computerized unit 62 is configured for activating said second actuator 5 when said second sensor 63 detects that said support structure 3 is not in said first non-operating position NOP1 and second non-operating position NOP2, for example said support structure 3 is in said first operating position 0P1 or second operating position 0P2. In particular, the computerized unit 62 is configured for activating said second actuator 5, and then for putting in rotation the brush 2, when the support structure 3 is in said first operating position 0P1 or second operating position 0P2 and for maintaining inactive said second actuator 5, and then for maintaining the brush 2 still, when the support structure 3 is in said first non-operating position NOP1 or second non-operating position NOP2.

In the shown embodiment, the device 1 comprises at least a stroke end stopper 314, 315 adapted to limit the movement of said support structure 3. In particular, said at least a stroke end stopper 314, 315 is configured for limiting the movement of said support structure 3 at said at least a non-operating position NOP1 , NOP2.

Specifically, the device 1 shown comprises two stroke end stoppers 314 and 315 configured, respectively, for limiting the movement of said support structure 3 at said first non-operating position NOP1 and said second nonoperating position NOP2. In the shown embodiment, the stroke end stoppers 314 and 315 comprise buffers adapted to strike the frame 32 when said support structure 3 is in said first non-operating position NOP1 or in said second non-operating position NOP2.

As shown more in detail, said stroke end stoppers 314 and 315 are associated with said support portion 31 , i.e said stroke end stoppers are mounted on said support portion 31 , specifically from two opposite sides of the dividing plane P so as to strike, respectively, the frame 32 at said first non-operating position NOP1 and said second non-operating position NOP2.

In an embodiment, said at least a second check sensor 63 is connected to said at least a stopper 314, 315.

As visible in figures 5-6 and schematically in figure 7, in an embodiment, the device 1 integrates an emergency stop device 64, for example, and not limited to an emergency stop button, which is operatively connected to said computerized unit 62 to allow an interruption of power supply to the first electric motor 41 and/or second electric motor 51 to cause an immediate stop of its operation.

With reference to figure 8, some aspects of a cleaning method 100 of a train using the device 1 above described will now be described.

In an initial stage, the cleaning method 100 comprises a step of arranging 101 the device 1 at a platform 11 associated to a railway 10 as previously described.

In particular, the step of arranging 101 provides for arranging a cleaning device 1 comprising at least the following elements: the brush 2 configured for affecting and cleaning a portion of said train; - the support structure 3 at least partially mobile, carrying said brush 2 and configurable in at least an operating position 0P1, 0P2 wherein said brush 2 is at the operating distance D, of selectable value, with respect to said railway 10;

- an actuator configured for moving said brush 2.

According to a non-limiting aspect, said step of arranging 101 provides said actuator comprises an electric motor, i.e. a current-powered motor. In the shown embodiment, the actuator configured for moving said brush 2 coincides with the second actuator 5, which preferably comprises the second electric motor 51.

The cleaning method 100 comprises, subsequently, a step of moving 102 relative to each other said train and said device 1 parallel to a longitudinal extension direction X of the railway 10.

According to the embodiment, said step of moving 102 relative to the train and the device 1 can provide one of the following options:

- moving the train along the railway 10 maintaining said device 1 still with respect to said platform 11;

- moving the device 1 parallel to the longitudinal extension direction X of the railway 10 maintaining the train still;

- moving both the device 1 and the train concordantly.

In the attached figures, showing an embodiment the support structure 3 is anchored to the platform 11 , i.e. connected in a fixed way without the possibility of translation, the step of moving 102 provides for the train to be moved along the railway 10, as shown in the arrows T 1 and T2 in figures 1-2 and 1A-2A.

As shown in figure 8, the cleaning method 100 comprises a step of configuring 103 selectively said support structure 3 in said first operating position OP1 when the train traverses said dividing plane P passing from said second half-space SP2 to said first half-space SP1 and in said second operating position OP2 when said train traverses said dividing plane P passing from said first half-space SP1 to said second half-space SP2.

With reference to the shown embodiment, a movement of the train from said second half-space SP2 to said first half-space SP1 is represented by the arrow T 1 in figures 1 -1 A and a movement of the train from said first halfspace SP1 to said second half-space SP2 is represented by the arrow T2 in figures 2-2A. In other words, arrows T1 and T2 represent two directions, opposite to each other, according to which the train to be cleaned can move along the railway 10.

According to an embodiment wherein the device 1 corresponds to the device shown in figures 1-6, said step of configuring 103 selectively said support structure 3 provides for rotating said frame 32 with respect to said support portion 31 around a first axis Y1.

As shown in figure 8, the cleaning method 100 comprises a step of cleaning 104 the train by means of contact between said brush 2 and a surface of said train. According to an aspect, during said step of cleaning 104, said brush 2 maintains said first operating position OP1 or said second operating position OP2 configured during the step of configuring 103 selectively said support structure 3.

Furthermore, said step of cleaning 104 the train provides for moving said brush 2 with the actuator 5 at least when said support structure 3 is in said first operating position OP1 or in said second operating position OP2. Specifically, said step of cleaning 104 provides for moving the brush 2 actuating an electric motor, corresponding to the second electric motor 51 in the shown embodiment, at least when said support structure 3 is in said first operating position OP1 or in said second operating position OP2.

As shown in figure 8, the cleaning method 100 comprises a step of detecting 105 at least a state parameter of said actuator 5 during the step of cleaning 103. According to the embodiment, said at least a state parameter can comprise one or more of the following parameters of the actuator: absorbed energy, delivered torque, internal and/or external temperature, engine revolutions, running and/or idle times.

In particular, said step of detecting 105 provides that said state parameter is a function of a quantity of current absorbed by said actuator, when the actuator comprises an electric motor, in the shown embodiment corresponding to the second electric motor 51 with the relative gear box 52.

In the embodiment here described, the cleaning method 100 comprises a step of adapting 106 the position of said brush 2 as a function of said at least a state parameter of the second actuator 5 maintaining the brush 2 in the first operating position OP1 or in the second operating position OP2 configured during the step of configuring 103 selectively said support structure 3. Specifically, the step of adapting 106 the position of said brush 2 provides for adapting the operating distance D.

In the shown embodiment, said step of adapting 106 the position of said brush 2 provides for varying the operating distance D between said brush 2 and said railway 10 by rotating said frame 32 with respect to said support portion 31 around a first axis Y1. In this embodiment, it is modified the angle A between said frame 32 and said dividing plane P maintaining anyhow the brush 2 in the first operating position OP1 or in the second operating position OP2.

In an embodiment, the step of adapting 106 the position of said one brush 2 provides for increasing the operating distance D when the quantity of current absorbed by the actuator 5 is higher than a first threshold and for decreasing the operating distance D when said quantity of absorbed current is lower than a second threshold. Specifically, said first threshold and second threshold are preferably thresholds with selectable values, i.e. modifiable and not fixed.

The invention achieves important advantages. First of all, the invention allows for overcoming at least some of the drawbacks of the known technique.

The device 1 object of the present invention allows for arranging a cleaning device equipped with brushes that is extremely flexible.

In particular, a first advantage of the present invention consists in the possibility of cleaning trains approaching the device from both directions on the associated railway. In fact, the configurability of the support structure in the two different operating positions described allows for cleaning a train effectively and without risk of scratches and breaks, regardless of the direction in which the train approaches the device. If the cleaning device can only take on one operating configuration, it would only be possible to clean trains coming from one direction, as the contact with trains approaching the device in the opposite direction would expose both the train and the device to risks of damages, such as scratches, dents or even breaks. On the other hand, the availability of two different operating positions allows for cleaning, on the one hand, trains in relative movement according to a first direction with the first operating position and, on the other hand, trains in relative movement according to a second direction opposite to the first direction with the second operating position.

A further advantage of the present invention, also connected to the availability of two different operating positions, is that the device can be installed in almost any train washing station. Specifically, known solutions, which as said clean trains moving relatively in one direction, require joints to direct the train to be cleaned in the correct direction so that it can be affected by the brushes of the device. Given the considerable size of trains, such junctions affect large areas on the sides of railway lines and/or in proximity of railway stations. In the present invention, the possibility of cleaning trains in both travel directions eliminates the need for such joints: in fact, independently of the travel direction of the train, it will be sufficient to simply divert the train onto the railway tracks associated with the device object of the present invention to bring the train at the relative brush or brushes, which are in the configuration adapted to affect a train in its approaching direction.

A further advantage consists in being able to repeat the train cleaning action several times in an extremely short time. In fact, once the first cleaning action or wiping has been carried out, it is sufficient to change the operating configuration of the device object of the invention and reverse the travel direction of the train (i.e., perform a reverse gear) to carry out a second cleaning action or wiping. Differently, with the known solutions, the execution of a second wiping requires, once the first wiping has been performed, at least two reversals of motion: a first reversal of motion to bring the entire train back to the opposite side of the device and a second reversal to perform the second wiping.

There are also clear economic and energetic advantages associated with the possibility of the device object of the invention to clean trains in both travel directions. First of all, it is not necessary to have large connecting areas to ensure the approach of the train in the correct travel direction. Furthermore, the device object of the present invention allows for performing the cleaning of a train in a considerably reduced time with respect to the known techniques and without the train having to perform supplementary movements and/or routes to undergo the cleaning action in the correct travel direction.

Another advantage of the device object of the present invention is connected to the presence of one or more electric motors.

In particular, the presence of an electric motor connected to the structure carrying the brush allows for a particularly quick and precise adjustment of the position of the brush. Specifically, the electrical solution allows a higher response speed with respect to known solutions using pneumatic systems. These solutions, in fact, are affected by the elasticity of the fluid (compressed air, oil, ...) used to exert a thrust on the piston. An electric motor does not have these drawbacks and allows a faster response. This reactivity allows to follow the profile of the train better, moving the support structure of the brush at different speeds under different conditions. The rapidity of response becomes particularly critical in the case of abrupt changes in the profile of the train. The rapidity of response of the electric motor allows a better tracking of the train profile, avoiding to a minimum the rebound of the brush against the train and the risk of damages to the train and/or the cleaning device.

In particular, the detection of the current absorbed by the electric motor of rotation of the brush allows a measurement in real time of the stress to which the brush is subjected and allows a prompt adjustment of the position of the brush. When the motor is under a too excessive stress the brush is moved away from the train to avoid scratches and/or collisions. When the motor is subjected to an insufficient stress, the brush is brought closer to the train to ensure a more effective cleaning action.

Another advantage of the invention is connected to the presence of a control system that adjusts the position of the brush as a function of the conditions of the actuator in charge of the rotation of the brush itself. This control system allows for performing a particularly efficient cleaning action. For example, this control system allows for adapting the position of the brush as a function of its wear state, by approaching the brush to the train when the length of the bristles reduces due to the wear so as to maintain the same incidence and penetration of the bristles on the surface of the train. These controls are not available in the known solutions, wherein the position of the brushes during the washing is limited by mechanical stoppers or by the stroke of cylinders and the brushes are constantly pushed towards the bodywork of the train, regardless of their state of wear.

Another advantage related to the exclusive use of electric motors in the present invention is related to ease of installation. The installation of a completely electric system is easier because the brush does not have to be connected to the pneumatic network and only requires an opportunely dimensioned power grid connection. Furthermore, it is not necessary the installation of any pneumatic box to the support structure.

Another advantage of the present invention related to the exclusive use of electric motors is related to the absence of locking systems when the device is at rest, i.e. in the non-operating position. In the electrical solution, the rest position of the brush, outside of the railway shape limit, is ensured by the irreversibility of the system, whose components cannot easily be moved when the electric motors are not powered. This avoids the installation of locking systems, such as pins with relative actuating pneumatic cylinders. Specifically, in the present invention, the non-operating position (at rest) is ensured by sensors, for example magnetic sensors, which ensure the check of the rest position of the support structure, in order to allow the passage of the train without washing on the railway.