BACKGROUND

1. Field

[0001] The disclosure relates to a vehicle for excavating with operation efficiency enhanced as a driving frame supporting a driving roller moves backward while cutting a plurality of cutting lines of a rock and an excavation method using the same.

2. Description of Related Art

[0002] In a case of a location where the rock is buried in construction of a tunnel by drilling the ground, a tunnel is excavated using a blasting method or TBM (Tunnel Boring Machine).

[0003] In the blasting method, the rock is cut along a cutting baseline using a wire-saw or a jet-burner and perforations for blasting are installed. Then, the explosive is charged, blasting is performed, and the rock is excavated within a corresponding range. In a case of the blasting method, it takes a lot of works and time to blast the rock in stability and a desired shape. In addition, explosions of explosives often excavate rocks to the unforeseen extent and cause problems due to pollution such as noise and dust scattering generated from blasting. [0004] TBM is a rotary excavator which rotates a cutter head equipped with a plurality of disc cutters, breaks and digs rocks, and the excavation using the TBM has advantages of faster construction speed than the blasting method, improved safety, and low pollution problem. However, the TBM is the very expensive equipment and has problems of more difficulty in small/medium-sized tunnel excavation works and reuse of the rock not available in that the rocks collected through the exaction is crushed at the size of gravel. [0005] For solving this problem, the technology of cutting and excavating rocks using a wire-saw is developed. In order to excavate the tunnel using a wire-saw, a target surface to be excavated is plotted and an entry hole is drilled along the circumference of the section. After then, an entry arm installed with a wire-saw is inserted to two adjacent entry holes from the entry holes, a wire-saw excavation apparatus is operated, and a cutting line of the section is cut. However, there was a problem that the operation time necessary for insertion, removal, and the like of the entry arm is excessively increased in order to cut along the plurality of cutting lines. [0006] Meanwhile, in Patent Registration No. 10-2242613 (Prior Document), a multi directional pulley is mounted on only one end of an entry arm inserted to an entry hole and wires outside of the entry hole interfere with each other. In addition, unlike the structure of the disclosure in which the wires are arranged in two rows, in the Prior Document, the wires are mounted on the multi-directional pulley in one row, which requires excessive cutting time, and the driving frame does not exist unlike the present disclosure, and thus there was a problem that another step cannot be performed at the same time with the cutting.

SUMMARY

[0007] An object of the disclosure is to integrate a wire-saw excavation apparatus installed on the floor in a limited tunnel space using a vehicle to provide mobility, enhanced operation efficiency, stability for preventing falling rocks.

[0008] A vehicle for excavating according to an embodiment of the disclosure may excavate a target surface of a rock on which a plurality of entry holes are formed using a wire- saw, the vehicle may include an entry arm which is inserted to each of the plurality of entry holes and comprises a pulley on which the wire-saw is wired, the wire-saw which is wired along the entry arm in a caterpillar manner, a front frame which is placed to face the target surface and supports the entry arm, a rear frame which is placed at the back of the front frame, a driving frame which is placed between the front frame and the rear frame, and a driving roller around which a part of the wire-saw is wound and which is supported by the driving frame, and the driving frame is controlled to move backward from the front frame toward the rear frame when the wire-saw circulates by the driving roller.

[0009] The driving roller may include a plurality of first rollers which are provided to be rotatable around a first shaft, and a plurality of second rollers which are provided to be rotatable around a second shaft in a direction different from that of the first shaft.

[0010] The plurality of entry holes may include a first entry hole, a second entry hole, and a third entry hole placed in sequence on a straight line, and the wire-saw may include a first wire-saw which is inserted into the first entry hole and the second entry hole to cut along a first cutting line placed between the first entry hole and the second entry hole, and a second wire-saw which is inserted into the second entry hole and the third entry hole to cut along a second cutting line placed between the second entry hole and the third entry hole.

[0011] The pulley may include a first groove which guides a circulation path of the first wire-saw on an outer peripheral surface and a second groove which guides a circulation path of the second wire-saw on an outer peripheral surface.

[0012] The entry arm may include a main body supported by the front frame, a plurality of first pulleys which are connected to a front surface of the main body and rotate in directions different from each other, and a plurality of second pulleys which are connected to a rear surface of the main body and rotate in directions different from each other, and the first pulley and the second pulley may be placed symmetrically around the main body.

[0013] The vehicle for excavating may further include a ceiling portion which is combined with the front frame and the rear frame to cover ceiling of the rock. [0014] The vehicle for excavating may further include a drilling device which is movable along an outer peripheral surface of the driving frame, and the ceiling portion may further include a drilling hole to which the drilling device is inserted.

[0015] An excavation method using a vehicle for excavating according to another embodiment of the disclosure may include a step of drilling a plurality of entry holes on a target surface of a rock to be excavated, a step of inserting a plurality of entry arms on which a wire- saw is wired to match with a cutting line connecting the plurality of entry holes among the target surface and which are supported by a front frame into the plurality of entry holes, respectively, a step of driving a driving roller which is supported by a driving frame placed at the back of the front frame and around which a part of wire-saw is wound, and a step of moving the driving frame backward, and the step of driving the driving roller and the step of moving the driving frame backward may be performed at the same time.

BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG. 1 is a perspective view of a vehicle for excavating according to an embodiment.

[0017] FIG. 2 is a diagram illustrating a state where a ceiling portion is removed from the vehicle for excavating of FIG. 1.

[0018] FIG. 3 is a diagram illustrating a process in which the vehicle for excavating excavates a rock.

[0019] FIGS. 4 and 5 are diagrams illustrating a state where a first driving roller and a second driving roller are driven.

[0020] FIG. 6 is a perspective view of an entry arm according to an embodiment.

[0021] FIG. 7 is a diagram illustrating a state where the entry arm of FIG. 6 is inserted to an entry hole. [0022] FIG. 8 is a diagram illustrating a process in which the vehicle for excavating excavates a vertical opening according to an embodiment.

[0023] FIG. 9 is a flowchart of an excavation method using the vehicle for excavating according to an embodiment.

RKTAΪΪ,KR DESCRIPTION

[0024] The examples described below are exemplified for understanding of the disclosure and it should be understood that the disclosure may be modified and performed variously unlike in the examples described herein. However, in describing the disclosure, a detailed description of the related art or configuration may be omitted when it is determined that the detailed description may unnecessarily obscure a gist of the disclosure. In addition, the accompanying drawings may not be illustrated with actual scales but may be illustrated with enlarged dimensions of some elements, for the understanding of the disclosure.

[0025] The terms used in the specification and claims have been selected as general terms as possible in consideration of functions in the embodiments of the disclosure. But, these terms may vary in accordance with the intention of those skilled in the art, the precedent, technical interpretation, the emergence of new technologies and the like. In addition, there are also terms arbitrarily selected by the applicant. Such terms may be interpreted as meanings defined in this specification and may be interpreted based on general content of the specification and common technical knowledge of the technical field, if there are no specific term definitions.

[0026] In this disclosure, the terms such as “comprise”, “may comprise”, “consist of’, or “may consist of’ are used herein to designate a presence of corresponding features (e.g., constituent elements such as number, function, operation, or part), and not to preclude a presence of additional features. [0027] Further, in the specification, elements necessary for describing each embodiment of the disclosure are described, and accordingly, there is no limitation thereto. Therefore, some elements may be changed or omitted and other elements may be added. In addition, the elements may be divided and disposed in different independent devices.

[0028] The embodiments of the disclosure will be described in detail with reference to the accompanying drawings and description in the accompanying drawings, but the disclosure is not limited by the embodiments.

[0029] Hereinafter, the disclosure will be described in more detail with reference to the accompanying drawings.

[0030] FIG. 1 is a perspective view of a vehicle for excavating according to an embodiment. FIG. 2 is a diagram illustrating a state where a ceiling portion is removed from the vehicle for excavating of FIG. 1. FIG. 3 is a diagram illustrating a process in which the vehicle for excavating excavates a rock.

[0031] Referring to FIGS. 1 to 3, a vehicle for excavating 1 according to an embodiment of the disclosure may excavate a target surface S of a rock on which a plurality of entry holes 5 are formed using a wire-saw W.

[0032] Before installing the vehicle for excavating of the disclosure, the plurality of entry holes 5 are drilled on the target surface S along a cutting section. The cutting section refers to a set of sections composed of cutting lines to be cut in order to excavate rocks.

[0033] That is, by cutting the rock to a predetermined depth according to the cutting line of the cutting section and cutting the end of the rock located at the predetermined depth, it is possible to take out the cut stone according to the cutting section using the equipment. By repeating this work, the tunnel can be excavated and the stone available to use may be obtained at the same time. [0034] An entry hole 5 is formed at the point where one cutting line and the other cutting line of the cutting section meet. The entry hole 5 may be drilled using a jumbo drill but not limited to it. An entry arm 500 where the wire-saw W is wired is inserted into the entry hole 5. The entry arm 500 is formed long in one direction to be inserted into the entry hole 5, and the cross section may be rectangular or circular but is not limited thereto.

[0035] In a state where the entry arm 500 is inserted to the entry hole 5, when a driving roller 400 rotates, the wire-saw W circulates by a pulley of the entry arm 500 and the driving roller 400, and when the driving roller 400 moves backward, the rock is cut along the cutting line. Particularly, as will be described later, the vehicle for excavating of the disclosure may perform cutting work at the same time for a plurality of cutting sections.

[0036] The vehicle for excavating 1 may include the wire-saw W, a front frame 100, a driving frame 200, a rear frame 300, the driving roller 400, and the entry arm 500.

[0037] The entry arm 500 may include a plurality of pulleys 510, 520, and 530 which are inserted to the plurality of entry holes 5, respectively and where the wire-saw W is wired. The plurality of pulleys 510, 520, and 530 may rotate in directions different from each other. [0038] The wire-saw W may be wired in the caterpillar manner along the entry arm

500. The wire-saw W may be circulated by the driving roller 400.

[0039] The front frame 100 may be placed to face the target surface S and may support the entry arm 500. The front frame 100 may include an outer peripheral frame 110, a first frame 120 placed in a first direction, and a second frame 130 placed in a second direction different from the first direction. For example, the outer peripheral frame 110 may have an arch shape, the first frame 120 may be placed in a horizontal direction, and the second frame 130 may be placed in a vertical direction. [0040] The front frame 100 may have a matrix structure in which the first frame 120 and the second frame 130 cross each other. The entry arm 500 may be installed at a point where the outer peripheral frame 110, the first frame 120, and the second frame 130 cross each other. [0041] A part of the first frame 120 and the second frame 130 may form a door 140 in a closed loop shape. The door 140 may be rotatably connected to the front frame 100.

[0042] For example, a user may open the door 140 to perform drilling and process spoil issued during the drilling step or the excavating step.

[0043] The rear frame 300 may be placed at the back of the front frame 100. The rear frame 300 may have an arch shape.

[0044] The front frame 100 and the rear frame 300 may move in a front-back direction by a wheel 10 installed on the lower side.

[0045] The driving frame 200 may be placed between the front frame 100 and the rear frame 300. The driving frame 200 may have an arch shape. The driving frame 200 may move in the front-back direction independently from the front frame 100 and the rear frame 300. The driving frame 200 may move forward or backward by a separate engine, and the engine for moving the driving frame 200 may be driven at the same time as the rotation of the driving roller 400.

[0046] The front frame 100, the driving frame 200, and the rear frame 300 may be placed to be spaced apart in sequence toward the rear side. The front frame 100, the driving frame 200, and the rear frame 300 may be integrally connected by a connection link 20.

[0047] The driving roller 400 may be wound by the wire-saw W and supported by the driving frame 200. As the driving roller 400 rotates, the wire-saw W is circulated to cut the rock according to the cutting line. In addition, as the driving frame 200 moves backward, the driving roller 400 moves in an opposite direction to the target surface S, and accordingly, the tension of the wire-saw W is maintained to cut the rock continuously. [0048] When the wire-saw W circulates by the driving roller 400, the driving frame

200 may be controlled to move backward from the front frame 100 toward the rear frame 300. [0049] Accordingly, the driving roller 400 rotatably supported by the driving frame 200 may move backward together with the driving frame 200 at the same time as rotation.

[0050] The driving roller 400 may include a plurality of first rollers 410 and a plurality of second rollers 420. The first roller 410 may be provided to be rotatable around a first shaft. The second roller 420 may be provided to be rotatable around a second shaft in a direction different from the first shaft. The first shaft may be placed vertically to be parallel to a Z axis and the second shaft may be placed horizontally to be parallel to a Y axis. The first roller 410 may be placed horizontally and the second roller 420 may be placed vertically.

[0051] An upper end and a lower end of the first roller 410 may be rotatably connected to an outer peripheral frame 210 of the driving frame 200. A left end and a right end of the second roller 420 may be rotatably connected to the outer peripheral frame 210 of the driving frame 200. The second roller 420 may be placed in front of the first roller 410 so as not to interfere with the first roller 410.

[0052] The plurality of entry holes 5 may include a first entry hole 5a, a second entry hole 5b, and a third entry hole 5c placed in sequence on a straight line. A first cutting line 6a may be placed between the first entry hole 5a and the second entry hole 5b. A second cutting line 6b may be placed between the second entry hole 5b and a third entry hole 5c. The first and second cutting lines 6a and 6b are virtual line segment formed on the target surface S and cut by the wire-saw W.

[0053] For example, referring to FIGS. 3 and 4, the first entry hole 5a, the second entry hole 5b, and the third entry hole 5c may be holes placed in sequence along a vertical direction that is parallel to the Z axis. In this case, the first cutting line 6a and the second cutting line 6b may be placed along the vertical direction. [0054] Meanwhile, referring to FIGS. 5 and 7, the first entry hole 5a, the second entry hole 5b, and the third entry hole 5c may be holes placed in sequence along a horizontal direction that is parallel to the Y axis. In this case, the first cutting line 6a and the second cutting line 6b may be placed along the horizontal direction.

[0055] However, the arrangement of the first to third entry holes 5a, 5b, and 5c and the first and second cutting lines 6a and 6b is not limited thereto.

[0056] The wire-saw W may include a first wire-saw W1 and a second wire-saw W2.

The first wire-saw W1 may be inserted into the first entry hole 5a and the second entry hole 5b to cut along the first cutting line 6a placed between the first entry hole 5a and the second entry hole 5b. The second wire-saw W2 may be inserted into the second entry hole 5b and the third entry hole 5c to cut along the second cutting line 6b placed between the second entry hole 5b and the third entry hole 5 c.

[0057] The vehicle for excavating 1 according to an embodiment of the disclosure may further include a ceiling portion 40 The ceiling portion 40 may be combined with the front frame 100 and the rear frame 300 to cover the ceiling of the rock. Accordingly, a worker may be safely protected by the ceiling portion 400 from rocks falling down unintentionally.

[0058] The vehicle for excavating 1 according to an embodiment of the disclosure may further include a drilling device 30 The drilling device 30 is able to move along the outer peripheral surface of the driving frame 200 In addition, the ceiling portion 40 may further include a drilling hole 41 to which the drilling device 30 is inserted.

[0059] A rail may be formed along the outer peripheral surface of the driving frame

200 and the drilling device 30 may move along the rail formed on the driving frame 200 The drilling device 30 may be inserted to the drilling hole 41 of the ceiling portion 40 to perform rock bolting process on the ceiling and wall surfaces. In other words, the vehicle for excavating 1 according to an embodiment of the disclosure may not only perform the excavating process, but also the rock bolting process at the same time.

[0060] FIGS. 4 and 5 are diagrams illustrating a state where the first driving roller and the second driving roller are driven.

[0061] Referring to FIG. 4, a pair of second driving rollers 420a and 420b, on which the wire-saws W1 and W2 are wired, may be rotatably driven. The pair of second driving rollers 420a and 420b may be placed in a line along the horizontal direction and may include the second- 1 driving roller 420a placed on the upper side and the second -2 driving roller 420b placed on the lower side.

[0062] The first wire-saw W1 may be wound around the second- 1 driving roller 420a and inserted to the first and second entry holes 5a and 5b, thereby cutting along the first cutting line 6a. The second wire-saw W2 may be wound around the second-2 driving roller 420b and inserted to the second and third entry holes 5b and 5c, thereby cutting along the second cutting line 6b.

[0063] Referring to FIG. 5, a pair of first driving rollers 410a and 410b on which the wire-saws W1 and W2 are wired may be rotatably driven. The pair of first driving rollers 410a and 410b may be placed in aline along the vertical direction and may include the first-1 driving roller 410a placed on the left side and the first-2 driving roller 410b placed on the right side. [0064] The first wire-saw W1 may be wound around the first-1 driving roller 410a and inserted to the first and second entry holes 5a and 5b, thereby cutting along the first cutting line 6a. The second wire-saw W2 may be wound around the first-2 driving roller 410b and inserted to the second and third entry holes 5b and 5c, thereby cutting along the second cutting line 6b. [0065] In other words, in the vehicle for excavating 1 according to an embodiment of the disclosure, one wire-saw may cut along one cutting line and the plurality of wire-saws may cut along each of the plurality of cutting lines. In addition, as the driving roller 400 rotating in different directions rotates and moves backward together with the driving frame 200, the cutting may be performed at the same time along cutting lines in different direction, thereby reducing the time required for the excavating process.

[0066] FIG. 6 is a perspective view of the entry arm according to an embodiment. FIG.

7 is a diagram illustrating a state where the entry arm of FIG. 6 is inserted to the entry hole. [0067] Referring to FIGS. 6 and 7, the entry arm 500 may include a main body 501, a stopper 502, a plurality of first pulleys 510a, 520a, and 530a, and a plurality of second pulleys 510b, 520b, and 530b. The main body 501 may be penetrated and supported by the front frame 100. As described above, the main body 501 may be installed at a point where the outer peripheral frame 110, the first frame 120, and the second frame 130 of the front frame 100 cross each other.

[0068] The stopper 502 may be placed in front of the plurality of first pulleys 510a,

520a, and 530a and may have a disk shape, but the shape thereof is not limited thereto. When the entry arm 500 is inserted to the entry hole, the stopper 502 may come into contact with an end of the entry hole to guide an insertion depth of the entry arm 500.

[0069] The plurality of first pulleys 510a, 520a, and 530a may be connected to a front surface of the main body 501 and rotate in directions different from each other. The plurality of first pulleys 510a, 520a, and 530a may rotate in the horizontal direction, the vertical direction, and the diagonal direction, respectively, and the number and the rotation direction of the pulleys are not limited thereto. The plurality of second pulleys 510b, 520b, and 530b may be connected to a rear surface of the main body 501 and rotate in directions different from each other. The first pulleys 510a, 520a, and 530a and the second pulleys 510b, 520b, and 530b may be placed symmetrically around the main body 501. [0070] The plurality of first pulleys 510a, 520a, and 530a may be inserted to the entry hole 5 and the plurality of second pulleys 510b, 520b, and 530b may be placed between the front frame 100 and the driving roller 400 to guide a movement path of the ware-saw W. [0071] The wire-saw W may be wired on a pulley which rotates in a specific direction among the plurality of first pulleys 510a, 520a, and 530a and may be wired on a pulley which rotates in the specific direction among the plurality of second pulleys 510b, 520b, and 530b. [0072] The pulley may include a first groove G1 which guides a circulation path of the first wire-saw W1 on the outer peripheral surface and a second groove G2 which guides a circulation path of the second wire-saw W2 on the outer peripheral surface.

[0073] Accordingly, the first wire-saw W 1 which cuts along the first cutting line 6a and the second wire-saw W2 which cuts along the second cutting line 6b may circulate without reciprocal interference.

[0074] Each of the plurality of first pulleys 510a, 520a, and 530a and the plurality of second pulleys 510b, 520b, and 530b may include a pair of guide pulleys PI and P2. The pair of guide pulleys PI and P2 may be placed to be spaced apart from each other and may be placed rotatably around the same axis.

[0075] The first groove G1 and the second groove G2 may be formed on the outer periphery of the pair of guide pulleys PI and P2, respectively. Therefore, the wire-saws may be arranged in two rows without interference to cut along the plurality of cutting lines at the same time.

[0076] FIG. 8 is a diagram illustrating a process in which the vehicle for excavating excavates a vertical opening according to an embodiment.

[0077] Referring to FIG. 8, the target surface S, which the vehicle for excavating 1 excavates, may be formed horizontally. In other words, the vehicle for excavating 1 may excavate a bottom surface to form a vertical opening. [0078] At that time, the front frame 100 of the vehicle for excavating 1 may be placed to face the bottom surface, and the driving frame 200 may be lifted up from the front frame 100 toward the rear frame 300. At the same time, as the driving roller 400 is driven, the wire- saw W may excavate the target surface S while maintaining the tension.

[0079] FIG. 9 is a flowchart of an excavation method using the vehicle for excavating according to an embodiment.

[0080] Referring to FIG. 9, the excavation method using the vehicle for excavating according to an embodiment of the disclosure may include a step S910 of drilling a plurality of entry holes on a target surface of a rock to be excavated.

[0081] The excavation method using the vehicle for excavating may include a step

S920 of inserting a plurality of entry arms on which a wire-saw is wired to match with a cutting line connecting the plurality of entry holes among the target surface and which are supported by a front frame into the plurality of entry holes, respectively.

[0082] The excavation method using the vehicle for excavating may include a step

S930 of driving a driving roller which is supported by a driving frame placed at the back of the front frame and around which a part of wire-saw is wound.

[0083] The excavation method using the vehicle for excavating may include a step

S940 of moving the driving frame backward.

[0084] The step S930 of driving the driving roller and the step S940 of moving the driving frame backward may be performed at the same time.

[0085] As the driving roller rotates, the wire-saw circulates and cuts the rock along the cutting line. At the same time, as the driving frame moves backward, the driving roller moves in an opposite direction to the target surface, and accordingly, the tension of the wire-saw is maintained to cut the rock continuously. [0086] While preferred embodiments of the disclosure have been shown and described, the disclosure is not limited to the aforementioned specific embodiments, and it is apparent that various modifications can be made by those having ordinary skill in the technical field to which the disclosure belongs, without departing from the gist of the disclosure as claimed by the appended claims. Also, it is intended that such modifications are not to be interpreted independently from the technical idea or prospect of the disclosure.