The utility model relates to a tool for perforating trapezoidal plates , comprising a perforating part with perforating spikes and a driving part for moving the perforating part .

Trapezoidal plates made of galvanised steel plates with a coating are used in many areas of li fe for various purposes . They are used as fences or load-bearing slabs , as in-situ formwork for monolithic reinforced concrete slabs and as a key element in lightweight construction, for example in warehouses , agricultural storage , industrial assembly and production halls , roofs and wall cladding .

The functions of the above-mentioned and other trapezoidal plate installations require the installation of a wide variety of indoor equipment , structures , utility lines , pipes , cables and the like , e . g . inside an assembly or production hall , which are suspended best on the trapezoidal plate cover . For this purpose , support wires are passed through the trape zoidal plates to which the suspension device of the structure in question can be connected .

In order to pass such suspension wires , holes must be made in the trapezoidal grooves of the trapezoidal plates , in line with each other, through which the suspension wire can be passed .

Manual trapezoidal plate-perforating tools are known . These are scissor-like devices , which, in order to develop the maximum torque possible , are designed to open and close long cylindrical actuating shafts by moving j aws containing perforating spikes towards and away from each other to place them on a trapezoidal plate gauge , to close them together to form aligned holes , and then to open them apart and remove them from the plate gauge . It is easy to see that piercing the extremely hard and relatively thick trapezoidal plate in two places in one stroke with the hand tool described above is a rather strenuous , tedious and slow operation .

The task to be solved with the utility model is to facilitate and speed up the operation of perforating trapezoidal plates by hand .

The concept is based on the realisation that by replacing the manual operating arms of the perforating tool described above with a driving part capable of connecting a hydraulically or electrically powered machine or device , the physical ef fort and manual labour can be eliminated and the perforating operation can be made signi ficantly faster, more accurate and safer .

On the basis of the above recognition, the set task has been solved by a tool for mechanically perforating trapezoidal plates , which has a perforating part comprising perforating spikes and a driving part for moving the perforating part , characterised by that the perforating part and the driving part are formed in the range of two ends of two mutually coupled and movable support bodies , and are designed as driving parts adapted to be coupled to a mechanical , preferably hydraulic or electric, actuator .

Preferred embodiments of the tool are shown in the subclaims .

The utility model is described in more detail below with reference to the accompanying drawings , which include a preferred embodiment of the tool . In the drawings

Figure 1 shows a top view of the tool ;

Figure 2 is a perspective drawing of the tool shown in Figure 1 , viewed from above and from the side ; Figure 3 shows a perspective view of the tool and actuator from above and from the side ; in Figure 4 , the final stage of coupling of the actuator and the tool of Figures 1 to 3 is shown in a perspective drawing viewed from above and from the side ; in Figure 5 , the actuator and the tool according to the utility model are shown in the coupled state ;

Figure 6 shows a top view of the position of the tool according to the utility model prior to the perforating actuation .

As shown in Figures 1 and 2 , the trapezoidal plate perforating tool 20 according to the utility model has a perforating part 1 and a driving part 2 , which are formed in the opposing end regions of the two supporting bodies 3 , which are symmetrical to the longitudinal centre plane X of the tool 20 .

The metallic material supporting bodies 3 are identically shaped and in the position shown in Figures 1 and 2 , they are aligned with their inner flat surface j aws 3a . The supporting bodies 3 are connected to each other by means of opposing platemetal coupling elements 5 , and by means of pins 6 which are passed through holes in the plate-metal coupling elements 5 and in the supporting bodies 3 , in such a way that they can be rotated around these pins 6 , i . e . they can be opened from their position as shown in Figures 1 and 2 , on the side facing the perforating part 1 . We also do not exclude the case where only one pin 6 is used . Each double-sided coupling elements 5 also have a coupling head 7 formed in a single part with them, which contains passing-through holes 8 . The supporting bodies 3 are formed as driving arms 9 forming the driving part 2 , with openings 10 between them, and the coupling heads 7 with their passing-through holes 8 extending above and below these openings 10 . The spacing between the two arms 9 is marked by the reference letter c . This spacing c varies during the operation of the device .

The inner surfaces 9a of the arms 9 are curved outwardly from the inside and are tapered towards their rounded tips 9b, which tips 9b face outwardly, so that they are easily accessible to the person operating the tool .

Returning to the perforating part 1 opposite the driving part 2 , it has spike holder heads 4 formed in a member with the supporting bodies 3 and adapted to receive the punching spikes 11 . The heads 4 , consequently the punching spikes 11 surrounded by the coil spring 12 , face each other and are fixed at their outer ends to the spike holder heads 4 by means of a screw nut 13 and intervening a washer 13a . The spacing b between the punching spikes 11 varies during the operation of the tool .

The operation of the tool 20 shown in Figures 1 and 2 will be described in detail hereinafter with reference to Figures 3 to 6 , in which the structural elements already described are indicated by the reference numbers already used .

In Figure 3 , the tool 20 is in the position shown in Figure 1 , and the head 15 of a sel f-contained hydraulic actuator 14 , such as the actuator 14 of a HILTI NOW 54-A crimping and cutting tool , having a spring-loaded fixing pin 16 , is prepared for insertion into the opening 10 between the moving arms 9 of the tool .

In the following operating phase , as shown in Figure 4 , the fixing pin 16 of the actuator 14 is pulled up against the spring 16a force and the head 15 is inserted into the 10 openings between the arms 9 until it is in contact , whereby the passing- through holes 8 of the coupling heads 7 of the lower and upper coupling elements 5 , still visible in Figure 3 , are aligned with the hole in the inside of the actuator 14 , which is not visible in Figures 3 to 5 and which is freed by pulling out the fixing pin 16 . When the fixing pin 16 is released, the spring 16a moves the pin back into the latter and the passing-through holes 8 ( Figures 1-3 ) , so that the solid contact shown in Figure 5 is established between the tool 20 according to the utility model and the actuator 14 , and the tool 20 is ready to perform the perforating operation . As shown in Figure 4 , the width s of the arms 9 is chosen to allow them to penetrate into the side openings of the actuator 14 .

The first phase o f this operation is illustrated in Figure 6 , where the operator taking the tool 20 in his hand 17 applies pressure with his fingers on the rounded tips 9b or tips of the arms 9 of the driving part 2 and pushes these arms 9 into the side slots of the actuator 14 , thereby causing the spike heads 4 of the perforating part 1 to move away from each other from their position as shown in Figures 1- 5 . , they kind of open up , and the perforated part can be slid onto the trapezoidal plate 18 .

The second phase of the operation is the actuation of the hydraulic actuator 14 by pressing a button (not shown) , whereby the mechanism in the head 15 of the actuator 14 , known per se , causes the arms 9 to spread apart , so that the punching spikes 11 move towards each other until the inner plane j aws 3a of the supporting bodies 3 collide again with each other, whereby the perforating is simultaneously ef fected .

Thereafter, the operator again pushes the arms 9 into the lateral apertures of the actuator 14 as described in relation to Figure 6 , spike holder heads 4 open and the punching spikes 11 slide out of the holes , preferably facilitated by the coil springs 12 .

The operator then places the opened tool 20 on the next trapezoidal plate 18 part to be perforated and, by repeating the operations described above , again forms a pair of holes . The advantage of the utility model is that it allows the trapezoidal plate perforating operation, which was previously a slow and cumbersome manual operation, to be carried out by a machine , making it faster, safer and more cost-ef fective .

The utility model is , of course , not limited to the embodiment of the tool as detailed above , but can be implemented in a variety of ways within the scope of protection defined by the claims .