Cleaning tool

Abstract

To provide a cleaning tool capable of enhancing the safety of workers.SOLUTION: A cleaning tool 40 is mounted on a drilling machine having a fluid supply channel 16a and a drilling rod 16 to clean a work surface. The cleaning tool 40 has a body portion 41 that is connected to the drilling rod 16 and has a communication passage 52 that communicates with the fluid supply channel 16a, and a brush 42 arranged around a rotation axis 27 of the body portion 41 and extending from the body portion 41 to the opposite side of the drilling rod 16 to rotate with the body portion 41. The body portion 41 has a blowout port 61 for blowing out the fluid supplied to the communication passage 52 toward the tip portion side of the brush 42.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a cleaning tool attached to a construction machine for cleaning a working surface.

Background Art

[0002] For example, as in Patent Document 1, a blasting method is known as an excavation method such as mountain tunnel construction. In an example of such a blasting method, after protecting a vertical face with sprayed concrete, a blasting hole is drilled in the face by a construction machine such as a drilling machine through the sprayed concrete. When the drilling operation is completed, with the surface of the sprayed concrete as the working surface, a cleaning operation inside the blasting hole, a loading operation of explosive into the blasting hole, and a wiring operation for the explosive are performed by workers. Then, after confirming that the workers have taken shelter, blasting is performed and the process proceeds to the next process, the overbreak operation.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] On the other hand, since the above-described working surface may have cracks or the like due to the drilling operation by the drilling machine, there is a risk that a part of it may peel off. Therefore, a higher level of safety is required for a series of operations by workers. Such a demand is common not only when the sprayed concrete is used as the working surface, but also when a part that is likely to peel off, such as the face itself, is used as the working surface.

Means for Solving the Problems

[0005] The cleaning tool for solving the above problems is a cleaning tool that is attached to a construction machine having a fluid supply path and a rotating part, and cleans the work surface on which an operator works. The cleaning tool includes a main body part that is connected to the rotating part and has a communication path communicating with the fluid supply path, and a brush that is arranged around the rotation axis of the main body part, extends from the main body part to the opposite side of the rotating part, and rotates together with the main body part. The main body part has a blowing part that blows the fluid supplied to the communication path toward the tip of the brush.

Effect of the Invention

[0006] According to the present invention, the safety of the operator can be enhanced.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0008] With reference to FIGS. 1 to 4, an embodiment of the cleaning tool will be described. The cleaning tool is attached to a construction machine having a fluid supply path and a rotating part. The cleaning tool cleans the work surface on which an operator works, and forcibly peels off a part that may peel off from the work surface.

[0009] (An example of a construction machine) As shown in Fig. 1, the construction machine of this embodiment is a drilling machine 10. In the tunnel 11, the drilling machine 10 performs a drilling operation for a blasting hole for inserting a charging agent through the shotcrete 13 covering the face 12 with respect to the face 12 (the ground ahead of the face 12).

[0010] The drilling machine 10 includes a unit 15. The unit 15 has a detachable drilling rod 16. The drilling rod 16 is a hollow pipe having a fluid supply passage inside. The unit 15 uses the mounted drilling rod 16 to perform a drilling operation on the face 12 through the shotcrete 13. A series of operations such as cleaning work in the blasting hole, loading work of the charging agent into the blasting hole, and connection work for the charging agent are performed with the surface of the shotcrete 13 as the working surface 13a.

[0011] The unit 15 is connected to the boom 18 via a coupler 17. The unit 15 is configured to be capable of various operations such as raising and lowering motion, slewing motion, and rolling motion with respect to the boom 18 by the coupler 17. The unit 15 is configured to be arranged at a desired position in the tunnel 11 by the boom 18.

[0012] The drilling machine 10 includes a man cage 19 on which an operator can board. A series of operations such as cleaning work in the blasting hole, loading work of the charging agent into the blasting hole, and connection work for the charging agent are performed by an operator boarding the man cage 19 for high positions.

[0013] As shown in Fig. 2, the unit 15 includes a guide cell 21 and a drifter 22. The guide cell 21 extends in one direction. The guide cell 21 is connected to the tip of the boom 18 via a coupler 17 on the base end side thereof. A holding mechanism 23 for rotatably holding the drilling rod 16 is provided at the tip of the guide cell 21.

[0014] The drifter 22 includes a drill body 25 and a joint 26. The drill body 25 is supported by the guide cell 21. The drill body 25 is configured to be movable along the extending direction of the guide cell 21. The drill body 25 is configured to be rotatable about a rotation axis 27 whose tip extends along the extending direction of the guide cell 21. The direction in which the rotation axis 27 extends is referred to as the rotation axis direction.

[0015] The joint 26 is connected to the tip of the drill body 25. The base end portion of the hole drilling rod 16 is detachably attached to the joint 26 by, for example, a screw connection structure or the like. The joint 26 is configured to be able to transmit the rotation by the drill body 25 to the hole drilling rod 16 as rotation around the rotation axis 27.

[0016] Also, a fluid supply unit 31 is connected to the joint 26 via a hose 30. The joint 26 is configured to be able to supply the fluid (for example, hole drilling water or air) supplied from the fluid supply unit 31 through the hose 30 to the fluid supply path 16a of the hole drilling rod 16. In the present embodiment, a cleaning tool 40 is configured to be connectable to the tip of the hole drilling rod 16.

[0017] (Cleaning tool) As shown in FIG. 3, the cleaning tool 40 includes a main body portion 41 and a brush 42. The hole drilling rod 16 is connected to the main body portion 41. The brush 42 is attached to the main body portion 41. The brush 42 may be fixed to the main body portion 41 or may be detachable from the main body portion 41. The main body portion 41 and the brush 42 rotate about the rotation axis 27 together with the hole drilling rod 16.

[0018] The main body portion 41 includes an outer cylinder portion 44, an inner cylinder portion 45, a connecting plate portion 46, a plurality of ribs 47, and a blowing portion. The outer cylinder portion 44 is, for example, a metal pipe. A base end closing portion 49 is provided at the base end portion of the outer cylinder portion 44 so as to close the opening portion. The base end closing portion 49 has an insertion port 50 at the center portion into which the tip of the hole drilling rod 16 can be inserted.

[0019] The inner cylinder part 45 is, for example, a metal pipe. The inner cylinder part 45 is disposed inside the outer cylinder part 44. The proximal end of the inner cylinder part 45 is located on the distal end side of the outer cylinder part 44 with respect to the proximal end of the outer cylinder part 44. The distal end of the inner cylinder part 45 is arranged at the same position as the distal end of the outer cylinder part 44 in the rotational axis direction.

[0020] A distal end closing part 51 for closing the opening is provided at the distal end part of the inner cylinder part 45. The distal end part of the boring rod 16 is detachably connected to the proximal end part of the inner cylinder part 45 through the insertion port 50 of the proximal end closing part 49. The inner cylinder part 45 and the boring rod 16 are detachably connected by, for example, a screw connection structure or the like. The inner cylinder part 45 forms a communication path 52 that communicates with the fluid supply path 16a of the boring rod 16. The fluid supplied by the fluid supply part 31 flows into the communication path 52 through the fluid supply path 16a.

[0021] The connecting plate part 46 connects the inner peripheral surface of the outer cylinder part 44 and the outer peripheral surface of the inner cylinder part 45. The connecting plate part 46 is, for example, an annular flat plate made of metal. The connecting plate part 46 is joined to the outer cylinder part 44 and the inner cylinder part 45 by a joining method such as welding.

[0022] The connecting plate part 46 connects the outer cylinder part 44 and the inner cylinder part 45 so that a part of the outer cylinder part 44 and a part of the inner cylinder part 45 protrude to the opposite side of the boring rod 16. The protruding part of the outer cylinder part 44 is referred to as the outer cylinder protruding part 54, and the protruding part of the inner cylinder part 45 is referred to as the inner cylinder protruding part 55.

[0023] The plurality of ribs 47 are located between the proximal end closing part 49 and the connecting plate part 46. Each rib 47 is a metal plate. Each rib 47 is joined to the outer cylinder part 44, the inner cylinder part 45, and the connecting plate part 46 by a joining method such as welding. Each rib 47 has a shape in which the length of the joining part with respect to the inner cylinder part 45 is longer than that of the outer cylinder part 44. Each rib 47 has a notch part 56 for avoiding the joining part between the inner cylinder part 45 and the connecting plate part 46. In the present embodiment, four ribs 47 are provided at equal intervals around the rotational axis 27.

[0024] The blowing part is composed of a plurality of blowing pipes 60. The blowing pipe 60 is, for example, a metal pipe. When viewed from the rotation axis direction, the plurality of blowing pipes 60 extend from the inner cylinder protruding part 55 in the radial direction centered on the rotation axis 27. The internal space of each blowing pipe 60 communicates with the communication passage 52. Each blowing pipe 60 has a blowout port 61 at its tip. Each blowing pipe 60 blows out the fluid supplied to the communication passage 52 through the fluid supply passage 16a toward the tip of the brush 42.

[0025] Each blowing pipe 60 has a straight pipe part 62 and a bent pipe part 63. The base end of the straight pipe part 62 is connected to the inner cylinder protruding part 55. The straight pipe part 62 extends linearly (radially outward centered on the rotation axis 27) from the inner cylinder protruding part 55 when viewed from the rotation axis direction. The bent pipe part 63 is integrally connected to the tip of the straight pipe part 62. The bent pipe part 63 is curved toward the opposite side of the hole drilling rod 16 so that the part located farther from the inner cylinder part 45 is located closer to the tip side of the inner cylinder part 45. A blowout port 61 is provided at the tip of the bent pipe part 63. The blowout port 61 is arranged so as to be located in the orthogonal plane orthogonal to the rotation axis 27 on the base end side of the inner cylinder part 45 rather than the tip of the inner cylinder part 45.

[0026] As shown in FIG. 4, as the above-described blowing pipe 60, the blowing part has a first blowing pipe 66, a second blowing pipe 67, and a third blowing pipe 68. The first blowing pipe 66, the second blowing pipe 67, and the third blowing pipe 68 are blowing pipes 60 having different lengths of the straight pipe part 62.

[0027] The first blowing pipe 66 is a blowing pipe 60 in which the blowout port 61 is located most inward when viewed from the rotation axis direction. The second blowing pipe 67 is a blowing pipe 60 in which the blowout port 61 is located most outward when viewed from the rotation axis direction. The third blowing pipe 68 is a blowing pipe 60 in which the blowout port 61 is located outside the blowout port 61 of the first blowing pipe 66 and inside the blowout port 61 of the second blowing pipe 67 when viewed from the rotation axis direction. The first to third blowing pipes 66 to 68 are arranged at equal intervals and in a predetermined order around the rotation axis 27.

[0028] As shown in FIG. 3, the brush 42 is attached to the connecting plate portion 46. The brush 42 has a number of linear members 42a extending from the connecting plate portion 46 toward the opposite side of the drilling rod 16. Each linear member 42a protrudes from the tip of the main body portion 41. The linear member 42a may be made of metal or resin as long as it has a predetermined strength. The brush 42 may expand outward at the tip portion.

[0029] (Function) The cleaning tool 40 described above is connected to the tip of the drilling rod 16 after the drilling operation on the sprayed concrete 13 is completed. When the drifter 22 rotates the drilling rod 16, the cleaning tool 40 rotates about the rotation axis 27. Further, the cleaning tool 40 blows out the fluid from the fluid supply unit 31 through the fluid supply passage 16a of the drilling rod 16 toward the tip of the brush 42 from the blowout port 61. The cleaning tool 40 is pressed against various locations on the working surface 13a of the sprayed concrete 13 by the operation of the drilling machine 10 by the operator. The cleaning tool 40 pressed against the working surface 13a forcibly peels off the portions likely to peel off from the sprayed concrete 13 by the rotating brush 42 and the fluid blown out from the blowout pipe 60, and discharges the peeled pieces to the outside of the cleaning tool 40. Further, while pressing the brush 42 of the cleaning tool 40 against the working surface 13a, by operating the drilling machine 10 or the boom 18, the working surface 13a can be cleaned while sequentially changing the cleaning position.

[0030] The effects of the present embodiment will be described. (1) The cleaning tool 40 is attached to a construction machine including the fluid supply passage 16a and the drilling rod 16 which is a rotating part, and cleans the working surface 13a where the operator works. The cleaning tool 40 includes a main body portion 41 connected to the drilling rod 16 and having a communication passage 52 communicating with the fluid supply passage 16a, and a brush 42 disposed around the rotation axis 27 of the main body portion 41 and extending from the main body portion 41 toward the opposite side of the drilling rod 16 and rotating together with the main body portion 41. The main body portion 41 has a blowing portion that blows out the fluid supplied to the communication passage 52 toward the tip of the brush 42.

[0031] When the working surface 13a is cleaned by such a cleaning tool 40, it is possible to forcibly peel off the peeling part of the sprayed concrete 13 that is likely to peel off in advance, and it is possible to significantly reduce the possibility that a part of the sprayed concrete 13 peels off during subsequent various operations such as the charging operation. As a result, the safety of the operator can be improved. In addition, by increasing the concentration of the operator on various operations, human errors can also be reduced.

[0032] (2) The blowing part has a plurality of blowout ports 61 around the rotation axis 27 when viewed from the rotation axis direction. As a result, since the blowout ports 61 are arranged so as to be scattered, the fluid can be evenly sprayed toward the tip of the brush 42. As a result, the discharge efficiency of the pieces forcibly peeled off can be increased.

[0033] (3) The main body part 41 has a communication passage 52 and an inner cylinder part 45 that rotates around the rotation axis 27. The blowing part is composed of a plurality of blowing pipes 60. Each blowing pipe 60 has a straight pipe part 62 extending in the radial direction from the inner cylinder part 45 and a curved pipe part 63 having a blowout port 61 at the tip curved from the tip of the straight pipe part 62 toward the tip of the brush 42 when viewed from the rotation axis direction. As a result, since the fluid is blown out from the blowout port 61 provided at the tip of the curved pipe part 63, the degree of freedom regarding the directivity of the fluid blown out from the blowout port 61 can be increased.

[0034] (4) In addition, since the directivity of the fluid blown out from the blowout port 61 is increased, the momentum of the fluid flowing through the brush 42 is likely to be maintained. As a result, the discharge efficiency of the pieces forcibly peeled off can be further increased.

[0035] (5) The blowing part is composed of a plurality of blowing pipes 60 having different lengths of the straight pipe parts 62. As a result, the effects described in (2), (3), and (4) above can be effectively obtained. (6) The main body portion 41 includes an outer cylinder portion 44, an inner cylinder portion 45 that is located inside the outer cylinder portion 44 and has a base end portion to which the tip end portion of the drilling rod 16 is connected and a closed tip end portion, and a connecting plate portion 46 that connects the inner peripheral surface of the outer cylinder portion 44 and the outer peripheral surface of the inner cylinder portion 45 so that a part of the outer cylinder portion 44 and a part of the inner cylinder portion 45 protrude to the opposite side of the drilling rod 16. The plurality of blowing pipes 60 are disposed in the region between the outer cylinder protruding portion 54 and the inner cylinder protruding portion 55.

[0036] By disposing the blowing pipes 60 in the region between the outer cylinder protruding portion 54 and the inner cylinder protruding portion 55 in this way, the blowing pipes 60 can be protected. Thereby, for example, when the cleaning tool 40 is pressed against the work surface 13a, contact between the blowing pipes 60 and the work surface 13a can be prevented.

[0037] (7) The construction machine is a drilling machine 10 having a hollow drilling rod 16 with a fluid supply passage 16a as a rotating portion. The cleaning tool 40 has an inner cylinder portion 45 connected to the tip end portion of the drilling rod 16.

[0038] According to such a configuration, there is no need to separately prepare a construction machine to which the cleaning tool 40 can be attached. Thereby, the space in the tunnel 11 can be effectively utilized. Also, following the drilling operation by the drilling machine 10, the cleaning operation by the cleaning tool 40 can be performed.

[0039] (8) The main body portion 41 has a plurality of ribs 47 that connect the outer cylinder portion 44, the inner cylinder portion 45, and the connecting plate portion 46. Thereby, the mechanical strength of the main body portion 41 can be increased. (9) The rib 47 has a notch portion 56 that escapes from the corner formed by the inner cylinder portion 45 and the connecting plate portion 46. Thereby, while increasing the mechanical strength of the main body portion 41, stress concentration is less likely to occur at the corner formed by the inner cylinder portion 45 and the connecting plate portion 46.

[0040] This embodiment can be implemented with the following modifications. This embodiment and the following modification examples can be implemented in combination with each other within a technically non - conflicting range. · The construction machine is not limited to the boring machine 10 having the boring rod 16. The construction machine may be any machine having a fluid supply passage and a rotating part, and for example, it may be a construction machine for excavation such as a hydraulic excavator.

[0041] · The main body of the cleaning tool may be connected to the rotating part of the construction machine and may have a communication passage communicating with the fluid supply passage and a blowing part that blows out the fluid toward the tip of the brush. Therefore, for example, as in the cleaning tool 40 shown in FIG. 5, the main body 70 has a cylindrical part 73 having a connecting part 71 to which the boring rod 16 is connected and a diameter-expanded part 72 that expands in diameter from the end of the connecting part 71, and as a blowing part, a blowing plate 75 that closes the large-diameter opening of the cylindrical part 73 and is formed with blowout ports 74 scattered therein. In this case, a communication passage 76 is formed by the cylindrical part 73 and the blowing plate 75. Note that when the fluid supplied by the fluid supply part 31 is air, it is preferable that the blowout port 74 closer to the rotation axis 27 has a smaller diameter. Thereby, the blowing amount of air from the blowout port 74 can be made uniform.

[0042] · Further, the blowing part may be constituted by, for example, a blowing pipe 78 extending along the rotation axis 27 from the blowing plate 75 as shown in FIG. 6. · The construction machine is not limited to a configuration in which the hollow part of the rotating part is used as the fluid supply passage. For example, as shown in FIG. 6, the construction machine may have a rotating part 80 rotatable about the rotation axis 27 and an external hose 81 that is a flow path supply passage. In this case, the cleaning tool 40 has a joint 82 that connects the main body 70 to the rotating part 80. This joint 82 is configured to be able to transmit the rotation of the rotating part 80 to the main body 70 and supply fluid to the main body 70 so that the external hose 81 is not twisted.

[0043] · The brush is not limited to the brush 42 composed of a large number of linear members 42a, and for example, it may be a bundle-like one in which a large number of linear members are intertwined.

Explanation of Reference Numerals

[0044] 10... Hole drilling machine, 11... Tunnel, 12... Face, 13... Sprayed concrete, 13a... Working surface, 15... Unit, 16... Hole drilling rod, 16a... Fluid supply path, 17... Connector, 18... Boom, 19... Man gauge, 21... Guide cell, 22... Drifter, 23... Holding mechanism, 25... Drill body, 26... Joint, 27... Axis of rotation, 30... Hose, 31... Fluid supply section, 40... Cleaning tool, 41... Main body section, 42... Brush, 42a... Linear member, 44... Outer cylinder section, 45... Inner cylinder section, 46... Connecting plate section, 47... Rib, 49... Base end closing section, 50... Insertion port, 51... Tip closing section, 52... Communication path, 54... Outer cylinder protruding section, 55... Inner cylinder protruding section, 56... Notch section, 60... Blowout pipe, 61... Blowout port, 62... Straight pipe section, 63... Curved pipe section, 66... First blowout pipe, 67... Second blowout pipe, 68... Third blowout pipe, 70... Main body section, 71... Connecting section, 72... Diameter-expanded section, 73... Cylinder section, 74... Blowout port, 75... Blowout plate, 76... Communication path, 78... Blowout pipe, 80... Rotating section, 81... External hose, 82... Joint.

Claims

1. A cleaning tool attached to a construction machine having a fluid supply passage and a rotating part, for cleaning a work surface where an operator works, comprising: a main body part connected to the rotating part and having a communication passage communicating with the fluid supply passage; a brush disposed around the rotation axis of the main body part, extending from the main body part to the opposite side of the rotating part, and rotating together with the main body part; the main body part having a blowing part for blowing the fluid supplied to the communication passage toward the tip of the brush; the blowing part having a plurality of blowout ports around the rotation axis when viewed from the rotation axis direction; the plurality of blowout ports including blowout ports having different distances from the rotation axis when viewed from the rotation axis direction cleaning tool.

2. A cleaning tool attached to a construction machine having a fluid supply passage and a rotating part, for cleaning a work surface where an operator works, comprising: a main body part connected to the rotating part and having a communication passage communicating with the fluid supply passage; a brush disposed around the rotation axis of the main body part, extending from the main body part to the opposite side of the rotating part, and rotating together with the main body part; the main body part having a blowing part for blowing the fluid supplied to the communication passage toward the tip of the brush; the blowing part having a blowout port at a position overlapping with the brush when viewed from the rotation axis direction cleaning tool.

3. The blowing part has a plurality of blowout ports around the rotation axis when viewed from the rotation axis direction The cleaning tool according to claim 2.

4. The main body part has a cylindrical part having the communication passage and rotating around the rotation axis, the blowing part is composed of a plurality of blowing pipes, the blowing pipe has a straight pipe part extending from the cylindrical part in the radial direction with respect to the rotation axis when viewed from the rotation axis direction, and a curved pipe part having a blowout port at the tip and curving from the tip of the straight pipe part toward the tip of the brush. The cleaning tool according to claim 1 or 3.

5. The blowing part is composed of a plurality of blowing pipes having different lengths of the straight pipe parts The cleaning tool according to claim 4.

6. The main body part has an outer cylindrical part, an inner cylindrical part which is the cylindrical part, is located inside the outer cylindrical part, and has a base end part connected to the rotating part and a closed tip end part, and a connecting plate part connecting the inner peripheral surface of the outer cylindrical part and the outer peripheral surface of the inner cylindrical part so that a part of the outer cylindrical part and a part of the inner cylindrical part protrude to the opposite side of the rotating part, the plurality of blowing pipes It is connected to a part of the inner cylinder part and is disposed in a region between a part of the outer cylinder part and a part of the inner cylinder part The cleaning tool according to claim 4 or 5.

7. The construction machine is a drilling machine having a hollow drilling rod having the fluid supply passage as the rotating part, The inner cylinder part is connected to the tip of the drilling rod The cleaning tool according to claim 6.

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