Water jet gun holding device

Abstract

Not only does it reduce the physical strain of chipping work, it also improves work efficiency and ensures safety during chipping work. [Solution] The holding device for a water jet gun of the present invention comprises: a first frame having a space into which a pair of single-tube pipes are inserted; a first roller holding section having a plurality of first rollers axially supported by the first frame and against which one of the pair of single-tube pipes abuts; a second roller holding section having a plurality of second rollers that abut against the other of the pair of single-tube pipes when one of the pair of single-tube pipes is abutted against each of the plurality of first rollers; a second frame that abuts each of the plurality of second rollers; a support section provided on either the first roller holding section or the second roller holding section and that supports the water jet gun so that it can swing; and a slide mechanism that can move the support section in a direction intersecting the extension direction of the pair of single-tube pipes.

Description

[Technical Field]

[0001] The present invention relates to a water jet gun holding device capable of holding a water jet gun used in chipping work of concrete structures. [Background technology]

[0002] In the repair and renovation of concrete structures, chipping work using high-pressure water is performed. For example, in chipping work using high-pressure water, a worker holds a water jet gun and sprays high-pressure water from the nozzle at the tip of the water jet gun toward the target area of ​​the concrete structure. At this time, the worker must hold the water jet gun while enduring the reaction force acting on the water jet gun when the high-pressure water is sprayed. Therefore, chipping work performed by a worker using a water jet gun is physically demanding for the worker. Furthermore, chipping work using a water jet gun poses a problem of reduced safety due to the worker's incorrect operation of the water jet gun.

[0003] For the purpose of reducing the physical burden on workers, for example, a flexible cradle for a fluid jet gun that holds the barrel of the fluid jet gun has been proposed (see Patent Document 1). According to this, part of the reaction force acting on the fluid jet gun when high-pressure water is ejected is dispersed to a rigid rod on which the flexible cradle for the fluid jet gun is installed, thereby reducing the physical burden on the worker holding the fluid jet gun. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Utility Model Registration No. 3147784 Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the fluid jet gun adjustable cradle disclosed in Patent Document 1, the worker must adjust its position relative to the rigid rod to match the area where the chipping work is being performed on the concrete structure. Therefore, chipping work performed by attaching a water jet gun to the fluid jet gun adjustable cradle disclosed in Patent Document 1 has the problem of low work efficiency. Furthermore, because the fluid jet gun adjustable cradle disclosed in Patent Document 1 is attached to a single rigid rod, if the attachment to the rigid rod is poor, the fluid jet gun adjustable cradle may rotate around the rigid rod, causing high-pressure water to be sprayed toward the worker from the spray nozzle provided at the tip of the water jet gun, which is extremely dangerous.

[0006] The present invention has been made in view of the above problems, and aims to not only reduce the physical burden in chipping work, but also to improve work efficiency and ensure safety in chipping work. [Means for solving the problem]

[0007] The water jet gun holding device disclosed herein is characterized by comprising: a first frame having a space into which a pair of single-tube pipes arranged parallel to each other are inserted; a first roller holding section having a plurality of first rollers axially supported by the first frame and against which one of the pair of single-tube pipes inserted into the space abuts; a second roller holding section having a plurality of second rollers that abut against the other of the pair of single-tube pipes when one of the pair of single-tube pipes is abutted against each of the plurality of first rollers; a support section provided on either the first roller holding section or the second roller holding section and that supports the water jet gun so that it can swing; and a slide mechanism that can move the support section in a direction intersecting the extension direction of the pair of single-tube pipes.

[0008] It is also preferable that the frame is provided with a hinge that can rotate the first frame and the second frame relatively between a first state in which one single pipe is in contact with each of the multiple first rollers and each of the multiple second rollers is in contact with the other single pipe of the pair of single pipes, and a second state in which each of the outer surfaces of the multiple second rollers retreats from the state in which it is in contact with the other single pipe of the pair of single pipes, and a retainer that holds the first frame and the second frame in the first state.

[0009] Furthermore, the support portion preferably comprises a spherical bearing to which the barrel of the water jet gun is fixed, and a casing member that holds the spherical bearing.

[0010] Furthermore, it is preferable that the barrel of the water jet gun is fixed to the spherical bearing via a clamp and a collar, and that the casing member is provided with a stopper member against which either the clamp or the collar abuts when the water jet gun swings.

[0011] It is also preferable that the slide mechanism comprises a pair of carriages provided on the casing member, and a pair of guide rails to which the pair of carriages are respectively attached and which extend in a direction intersecting the extension direction of the pair of single-tube pipes. [Effects of the Invention]

[0012] According to the present disclosure, not only can the physical burden of chipping work be reduced, but work efficiency and safety can also be improved during chipping work. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a perspective view showing an example of a holding device for a water jet gun according to an embodiment of the present invention. FIG. [Figure 2] FIG. 2 is a front view of the water jet gun holding device shown in FIG. [Figure 3] FIG. 2 is a rear view of the water jet gun holding device shown in FIG. [Figure 4]FIG. 2 is a plan view of the water jet gun holding device shown in FIG. [Figure 5] FIG. 2 is a bottom view of the water jet gun holding device shown in FIG. [Figure 6] FIG. 2 is a left side view of the water jet gun holding device shown in FIG. [Figure 7] FIG. 2 is a right side view of the water jet gun holding device shown in FIG. [Figure 8] FIG. 2A is a perspective view showing an example of the configuration of the peripheral part of a spherical bearing, and FIG. 2B is an exploded perspective view showing the configuration of the peripheral part of the spherical bearing shown in FIG. 2A. [Figure 9] FIG. 2 is a left side view showing an example of a water jet gun holding device that holds a water jet gun. [Figure 10] 10 is a left side view showing the state immediately before the holding device is attached to a pair of single pipes. FIG. [Figure 11] 10 is a left side view showing a state in which a pair of single pipes are inserted into the upper roller holding portion of the holding device. FIG. [Figure 12] FIG. 10 is a left side view showing the state in which the holding device is attached to a pair of single pipes. [Figure 13] 1 is a perspective view of the water jet gun holding device viewed from below, showing the state immediately before the water jet gun is attached to the water jet gun holding device. FIG. [Figure 14] 1 is a perspective view of the water jet gun holding device, showing the water jet gun attached to the water jet gun holding device, viewed from below. FIG. [Figure 15] 1 is a left side view showing the state in which the water jet gun is attached to the water jet gun holding device so that the barrel of the water jet gun is parallel to the vertical direction. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] A water jet gun holding device of this embodiment will be described with reference to the drawings. Fig. 1 is a perspective view showing an example of a water jet gun holding device. Fig. 2 is a front view of the water jet gun holding device shown in Fig. 1, and Fig. 3 is a rear view of the water jet gun holding device shown in Fig. 1. Fig. 4 is a plan view of the water jet gun holding device shown in Fig. 1, and Fig. 5 is a bottom view of the water jet gun holding device shown in Fig. 1. Fig. 6 is a left side view of the water jet gun holding device shown in Fig. 1, and Fig. 7 is a right side view of the water jet gun holding device shown in Fig. 1. In the following description, the X direction is the left-right direction, the Y direction is the front-rear direction, and the Z direction is the up-down direction.

[0015] 1 to 7, a holding device 10 for a water jet gun (hereinafter referred to as the holding device) includes an upper roller holding section 20 and a lower roller holding section 40. Here, the upper roller holding section 20 and the lower roller holding section 40 correspond to the first roller holding section and the second roller holding section, respectively, as set forth in the claims.

[0016] The upper roller holder 20 has a holder frame 21 and rollers 22 and 23. The holder frame 21 is composed of a pair of holder plates 24 and 25 and a connecting plate 26. The pair of holder plates 24 and 25 are arranged parallel to each other with a predetermined gap between them in the front-to-rear direction. The holder frame 21 corresponds to a first frame in the claims. The rollers 22 and 23 correspond to first rollers in the claims.

[0017] Of the pair of holding plates 24, 25, positioning pieces 27, 28 are fixed to the lower end of holding plate 24. Positioning piece 27 is fixed to the front surface 24a of holding plate 24, and positioning piece 28 is fixed to the rear surface 24b of holding plate 24. When holding device 10 changes from the open state to the fixed state, the upper end of holding plate 51 of lower roller holding part 30 is inserted between positioning piece 27 and positioning piece 28 (see FIG. 6 or FIG. 7).

[0018] The connecting plate 26 is a member that connects the pair of holding plates 24, 25 at the upper ends of the pair of holding plates 24, 25. By connecting the connecting plate 26 at the upper ends of the pair of holding plates 24, 25, the holding frame 21 has a space SP with open left and right side surfaces and a bottom surface. A U-shaped grip portion 29 is provided on the upper surface of the connecting plate 26. The grip portion 29 is a portion that is gripped by an operator when transporting the holding device 10.

[0019] Because roller 22 and roller 23 have the same configuration, the configuration of roller 22 will be described below, with the configuration of roller 23 shown in parentheses. Roller 22 (23) is composed of a roller main body 22a (23a) and a rotating shaft 22b (23b) that rotatably holds roller main body 22a (23a). Roller 22 (23) is disposed across a pair of holding plates 24, 25 so that the central axis of rotating shaft 22b (23b) of roller 22 (23) is aligned in the front-to-rear direction.

[0020] When the holding device 10 is mounted, for example, across a pair of single-pipe pipes 201, 202, the outer peripheral surface 22c (23c) of the roller body 22a (23a) abuts against or is pressed against one of the pair of single-pipe pipes 201, 202 (for example, the single-pipe pipe 201). As shown in a left side view of the holding device 10, the outer peripheral surface 22c (23c) of the roller body 22a (23a) has a shape that is concave, for example, in the shape of an arc, toward the midpoint of the rotation shaft 22b (23b). It is preferable that the outer peripheral surface 22c (23c) of the roller body 22a (23a) has a shape that matches the cross-sectional shape of the outer peripheral surface of the single-pipe pipe 201 to be pressed.

[0021] The pair of single pipes 201, 202 are attached to the single pipe 250 via a joint 260. The pair of single pipes 201, 202 and the single pipe 250 may be installed on a concrete structure for chipping work, or may form part of scaffolding installed when repairing or renovating a concrete structure.

[0022] The lower roller holder 40 comprises a holder frame 41, rollers 42 and 43, a barrel support 44, and a slide mechanism 45. Here, the holder frame 41 corresponds to the second frame in the claims. The rollers 42 and 43 correspond to the second roller in the claims. Furthermore, the barrel support 44 corresponds to the support in the claims.

[0023] The holding frame 41 is composed of a pair of holding plates 51, 52 and connecting brackets 53, 54 fixed across the pair of holding plates 51, 52. The connecting brackets 53, 54 are arranged at both ends in the width direction, spanning the pair of holding plates 51, 52. Reference numeral 55 denotes rubber feet provided on the connecting brackets 53, 54. Reference numerals 56, 57 denote support members for preventing deformation of the connecting brackets 53, 54. The support members 56, 57 also function as gripping portions that an operator holds to slide the holding device 10 in the extension direction of the pair of single-tube pipes 201, 202 (for example, the X direction in FIG. 1 ) when performing chipping work with the jet nozzle 102 of the water jet gun 100 facing downward.

[0024] The rollers 42, 43 are arranged across a pair of holding plates 51, 52 so that the central axes of the rollers 42, 43 are aligned in the front-to-rear direction. When viewed from the front or rear of the holding device 10, the rollers 42, 43 are arranged further outward than the rollers 22, 23 provided in the upper roller holding portion 20. Because the rollers 42 and 43 have the same configuration, the configuration of roller 42 will be described below, and the configuration of roller 43 will be indicated in parentheses.

[0025] The roller 42 (43) is composed of a roller body 42 a (43 a) and a rotation shaft 42 b (43 b) that rotatably holds the roller body 42 a (43 a). The roller 42 (43) is arranged so that the rotation shaft 42 b (43 b) of the roller 42 (43) straddles each of the pair of holding plates 51, 52. In this case, the central axis direction of the rotation shaft 42 b (43 b) of the roller 42 (43) is perpendicular to each of the pair of holding plates 51, 52.

[0026] When the holding device 10 is mounted, for example, across a pair of single-pipe pipes 201, 202, the outer peripheral surface 42c (43c) of the roller body 42a (43a) is pressed against one of the pair of single-pipe pipes 201, 202 (e.g., single-pipe pipe 202). As shown in the left side view or right side view of the holding device 10, the outer peripheral surface 42c (43c) of the roller body 42a (43a) is concave toward the midpoint of the rotation shaft 42b (43b) and toward the rotation shaft 42b (43b). More specifically, the outer peripheral surface 42c (43c) of the roller body 42a (43a) is concave in an arc shape. It is preferable that the outer peripheral surface 42c (43c) of the roller body 42a (43a) has a shape that matches the cross-sectional shape of the outer peripheral surface of the single-pipe pipe 202 to be pressed.

[0027] The barrel support part 44 is composed of a spherical bearing 61 fixed to the barrel 101 of the water jet gun 100, and a casing member 62 that holds the spherical bearing 61. As shown in Figures 8(a) and 8(b), the barrel 101 of the water jet gun 100 is fixed to the spherical bearing 61 using a clamp 63 and a collar 64.

[0028] The clamp 63 is made up of two members 63a and 63b. The two members 63a and 63b constituting the clamp 63 are fixed together by a bolt 65 or the like while sandwiching the barrel 101 of the water jet gun 100. The spherical bearing 61 is attached to one end of the clamp 63 while the clamp 63 is fixed to the barrel 101 of the water jet gun 100.

[0029] Collar 64 is made up of two members 64a and 64b. The two members 64a and 64b making up collar 64 are fixed to one end of clamp 63 with bolts 66 or the like while clamping clamp 63. Here, with collar 64 fixed to one end of clamp 63, spherical bearing 61 is prevented from coming off one end of clamp 63.

[0030] The casing member 62 is a member that holds the spherical bearing 61. The casing member 62 is composed of a main body portion 62a and a rotating portion 62b. As shown in Figures 13 and 14, an arc-shaped recess 67 is formed at the lower end of the main body portion 62a. Furthermore, an arc-shaped recess 68 is formed at the upper end of the rotating portion 62b. The spherical bearing 61 is inserted into these recesses 67, 68.

[0031] Furthermore, carriages 71 and 72 are provided at the upper left end of the main body 62a. The carriage 71 is attached to a guide rail 73 provided on the holding frame 41, and the carriage 72 is attached to a guide rail 74 provided on the holding frame 41. The carriage 71 is fixed to the main body 62a by a bracket 75. Similarly, the carriage 72 is fixed to the main body 62a by a bracket 76. Of the carriages 71 and 72, the carriage 71 is provided with an operating lever 77. The operating lever 77 is operated to fix the position of the casing member 62 relative to the guide rails 73 and 74, or to release the fixed position of the casing member 62 relative to the guide rails 73 and 74.

[0032] Approximately arc-shaped stopper members 78a, 78b are provided on the rear surfaces of the main body 62a and the rotating portion 62b of the casing member 62. When the barrel 101 of the water jet gun 100 supporting the spherical bearing 61 swings, the collar 64 fixed to the barrel 101 comes into contact with the stopper members 78a, 78b, limiting the swing of the water jet gun 100 to a predetermined angle range.

[0033] 9, the water jet gun 100 can be swung in the YZ plane within an angular range of, for example, ±θ1, with the center C5 of the inner ring 61b of the spherical bearing 61 as the base point. Here, the angle θ1 is, for example, θ1=4.5°. Note that the value of the angle θ1 is merely an example, and the angle θ1 may be set to an angle that prevents high-pressure water from being sprayed from the spray nozzle 102 of the water jet gun 100 toward an operator operating the water jet gun 100 normally during chipping work using the water jet gun 100 in normal operation.

[0034] Here, symbol CL1 in Figure 9 is the central axis of the barrel 101 of the water jet gun 100 when the extension direction of the barrel 101 is parallel to the Y direction. Also, symbol CL2 in Figure 9 is the central axis of the barrel 101 when the water jet gun 100 is swung by an angle of +θ1. Also, symbol CL3 in Figure 9 is the central axis of the barrel 101 when the water jet gun 100 is swung by an angle of -θ1. Note that the angle when the tip of the water jet gun 100 is tilted upward is indicated by "+", and the angle when the tip of the water jet gun 100 is tilted downward is indicated by "-".

[0035] Although not shown, the water jet gun 100 can also be swung in the XY plane within an angle range of ±θ2, for example, with the center C5 of the inner ring 61b of the spherical bearing 61 as the base point. Here, tilting the tip of the water jet gun 100 toward the left is indicated by "+," and tilting the tip of the water jet gun 100 toward the right is indicated by "-." Note that the angles θ1 and θ2 may be the same or different. Similarly to the angle θ1, the value of the angle θ2 described above may be set to an angle that prevents high-pressure water from being sprayed from the spray nozzle 102 of the water jet gun 100 toward the operator operating the water jet gun 100 during chipping work using the water jet gun 100 in the normal manner.

[0036] The rotating part 62b is rotatably attached to the main body 62a. The rotating part 62b rotates between a closed position where it clamps the spherical bearing 61 between itself and the main body 62a, and an open position where it retreats from the closed position and allows the spherical bearing 61 to be attached or detached. When the rotating part 62b is in the closed position, the rotating part 62b is fixed to the main body 62a by a screw 79.

[0037] The slide mechanism 45 is composed of a pair of guide rails 73, 74 and carriages 71, 72 fixed to the main body 62a of the casing member 62. Of the pair of guide rails 73, 74, the guide rail 73 is fixed across the holding plates 51, 52 via a channel-shaped bracket 81. Similarly, the guide rail 74 is fixed across the holding plates 51, 52 via a channel-shaped bracket 82. The guide rails 73, 74 fixed across the holding plates 51, 52 are arranged so that the extension direction of the guide rails 73, 74 is the front-rear direction.

[0038] A carriage 71 provided on the main body 62a of the casing member 62 is slidably attached to the guide rail 73. At the same time, a carriage 72 provided on the main body 62a of the casing member 62 is slidably attached to the guide rail 74. Therefore, the casing member 62 can slide along the extending direction of the guide rails 73, 74 (for example, the front-rear direction).

[0039] Hereinafter, since the guide rails 73, 74 have the same configuration, the configuration of the guide rail 74 will be indicated by reference numerals in parentheses. Stoppers 73a, 73b (74a, 74b) are provided on both ends of the guide rail 73 (74) in the extension direction and on the surface facing the guide rail 74 (73). As shown in FIG. 9, the position of the stopper 73a is the same as the position of the stopper 74a. Similarly, the position of the stopper 73b is the same as the position of the stopper 74b.

[0040] By providing stoppers 73a, 73b (74a, 74b) at both ends of the guide rail 73 (74) in the extension direction and on the surface facing the guide rail 74 (73), the carriage 71 (72) attached to the guide rail 73 (74) can move between a position where it abuts against the stopper 73a (74a) (position shown by the two-dot chain line in FIG. 9) and a position where it abuts against the stopper 73b (74b) (position shown by the one-dot chain line in FIG. 9). Note that in the left side view of the holding device 10, the amount of movement of the casing member 62 is the distance L1 from the center P1 of the carriage 71 (72) when it abuts against the stopper 73a (74a) to the center P2 of the carriage 71 (72) when it abuts against the stopper 73b (74b).

[0041] The holding plate 25 of the upper roller holding unit 20 and the holding plate 52 of the lower roller holding unit 30, which constitute the holding device 10, are connected at both ends in the left-right direction by hinges 91. Connecting the holding plate 25 of the upper roller holding unit 20 and the holding plate 52 of the lower roller holding unit 40 by hinge 91 allows the upper roller holding unit 20 and the lower roller holding unit 30, which constitute the holding device 10, to move relative to each other. In detail, the lower roller holding unit 30 can be changed between a fixed state (see FIG. 7, for example) in which it is positioned below the upper roller holding unit 20, and an open state (see FIG. 10, for example) in which it is retracted from below the upper roller holding unit 20. Here, the fixed state corresponds to a first state recited in the claims, and the open state corresponds to a second state recited in the claims.

[0042] As shown in Fig. 6, when the holding device 10 is in the fixed state, the space SP formed below the rollers 22, 23 of the upper roller holding part 20 is a space surrounded by the lower roller holding part 40. On the other hand, as shown in Fig. 10, when the holding device 10 is in the open state, the space SP formed below the rollers 22, 23 of the upper roller holding part 20 becomes an open space as the lower roller holding part 40 rotates.

[0043] 7, when the holding device 10 is in the fixed state, the distance L2 between the center C1 of the outer peripheral surface of the roller 23 (22) and the center C2 of the outer peripheral surface of the roller 43 (42) is set to be the same as or shorter than the distance L3 (see FIG. 9) from the center C3 of the single-pipe 201 to the center C4 of the single-pipe 202. As a result, when the holding device 10 is changed from the open state to the fixed state, the outer peripheral surfaces 22a, 23a of the rollers 22, 23 of the upper roller holding unit 20 are pressed against the single-pipe 201, and the outer peripheral surfaces 42a, 43a of the rollers 42, 43 of the lower roller holding unit 40 are pressed against the single-pipe 202.

[0044] The above-described holding device 10 has snap locks 95 provided at both left and right ends thereof, spanning the holding plate 24 of the upper roller holding portion 20 and the holding plate 51 of the lower roller holding portion 30. The snap locks 95 are provided to maintain the holding device 10 in a fixed state. The snap lock 95 has a base metal fitting 96 provided on the holding plate 25 of the upper roller holding portion 20 and a hook 97 provided on the holding plate 51 of the lower roller holding portion 30. A lever 98 is pivotally supported on the base metal fitting 96 so that it can rotate freely. Furthermore, a connecting rod 99 that can engage with the hook 97 is pivotally supported on the lever 98. Here, the snap lock 95 corresponds to a holder as recited in the claims.

[0045] Next, a procedure for attaching the above-described holding device 10 to a pair of single-tube pipes 201, 202 installed at the site where chipping work is to be performed will be described. First, the snap lock 95 of the holding device 10 is released by the worker. Once the snap lock 95 is released, the lower roller holding unit 40 can be rotated relative to the upper roller holding unit 20. When the worker rotates the lower roller holding unit 40 in a direction retracting from below the upper roller holding unit 20, the space SP of the upper roller holding unit 20 is opened.

[0046] In this state, the operator moves the holding device 10, and inserts the pair of single pipes 201, 202 into the space SP surrounded by the rollers 22, 23 and the holding plate (see FIG. 11). At this time, of the pair of single pipes 201, 202, the single pipe 201 abuts against the outer circumferential surfaces 22a, 23a of the rollers 22, 23. Thereafter, the lower roller holding unit 40 is rotated to a position below the upper roller holding unit 20. This rotation inserts the upper end of the holding plate 51 between the positioning pieces 27, 28. In addition, the rollers 42, 43 abut against the single pipe 202. Finally, the snap lock 95 is used to lock the holding device 10, thereby fixing it in place. At this time, the rollers 22 and 23 of the upper roller holding unit 20 are pressed against the single pipe 201, and at the same time, the rollers 42 and 43 of the lower roller holding unit 40 are pressed against the single pipe 202. At this time, the position of the holding device 10 relative to the pair of single pipes 201 and 202 is maintained constant.

[0047] When the holding device 10 is attached to the pair of single pipes 201, 202, the spherical bearing 61 to which the barrel 101 of the water jet gun 100 is fixed is not attached to the barrel support part 44. Therefore, after installing the holding device 10 on the pair of single pipes 201, 202, it is necessary to attach the spherical bearing 61 to which the barrel 101 of the water jet gun 100 is fixed to the barrel support part 44. When attaching the spherical bearing 61 to which the barrel 101 of the water jet gun 100 is fixed to the barrel support part 44, the spherical bearing 61 is attached to the barrel 101 of the water jet gun 100 using a clamp 63 and a collar 64.

[0048] First, the screw 79 is loosened to rotate the rotating portion 62b of the casing member 62. In this state, the upper end side of the outer ring 61a of the spherical bearing 61 fixed to the barrel 101 of the water jet gun 100 is inserted into the recess 67 provided in the main body 62a of the casing member 62. Then, the rotating portion 62b of the casing member 62 is closed. At this time, the lower end side of the outer ring 61a of the spherical bearing 61 is inserted into the recess 68 provided in the rotating portion 62b of the casing member 62. Finally, the screw 79 is tightened. This allows the water jet gun 100 to be supported by the barrel support portion 44 via the spherical bearing 61. At this time, the inner ring 61b of the spherical bearing 61 can rotate relative to the outer ring 61a. Therefore, the water jet gun 100 can swing via the spherical bearing 61.

[0049] In this state, the water jet gun 100 can move between a position where the carriages 71, 72 abut against the stoppers 73a, 74a of the guide rails 73, 74 and a position where they abut against the stoppers 73b, 74b of the guide rails 73, 74.

[0050] More specifically, when the worker pushes the water jet gun 100 toward the target object, the carriages 71 and 72 move along the guide rails 73 and 74. As a result, the water jet gun 100 slides in a direction in which the ejection nozzle 102 provided at the tip of the barrel 101 approaches the concrete structure. On the other hand, when the worker pulls the water jet gun 100 toward the worker, the carriages 71 and 72 move along the guide rails 73 and 74. As a result, the water jet gun 100 slides in a direction in which the ejection nozzle 102 provided at the tip of the barrel 101 moves away from the concrete structure.

[0051] As described above, when the holding device 10 is attached to the pair of single pipes 201, 202, the rollers 22, 23 are pressed against the single pipe 201, and the rollers 42, 43 are pressed against the single pipe 202. Therefore, when the operator presses the water jet gun 100 to the left or right, the rollers 22, 23, 42, 43 rotate in accordance with the pressing direction. The rotation of the rollers 22, 23, 42, 43 allows the holding device 10 to move along the extension direction of the single pipes 201, 202.

[0052] Furthermore, the spherical bearing 61 attached to the barrel 101 of the water jet gun 100 is mounted in a casing member 62. A substantially arc-shaped stopper member 78a is fixed to the main body 62a of the casing member 62. Furthermore, a substantially arc-shaped stopper member 78b is fixed to the rotating portion 62b of the casing member 62. When the barrel 101 of the water jet gun 100 is rotated, a collar 64 abuts against these stopper members 78a and 78b, thereby limiting the angular range over which the water jet gun 100 swings.

[0053] As shown in FIG. 15 , when the holding device 10 shown in this embodiment is installed on two single-tube pipes 211, 212 arranged on a horizontal plane, the extension direction of the barrel 101 of the water jet gun 100 held by the holding device 10 is, for example, the vertical direction. As described above, the water jet gun 100 is limited to swinging within an angle range of ±θ1 with the vertical direction as the reference. Symbol CL4 in FIG. 15 indicates the central axis of the water jet gun 100 when the extension direction of the barrel 101 of the water jet gun 100 is the vertical direction. Symbol CL5 in FIG. 15 indicates the central axis of the barrel 101 of the water jet gun 100 when the tip of the water jet gun 100 is moved forward (toward the target object). Symbol CL6 in FIG. 15 indicates the central axis of the water jet gun 100 when the tip of the water jet gun 100 is moved backward (toward the operator). Here, the angle when the tip of the water jet gun 100 is moved forward (towards the object) is indicated as "+", and the angle when the tip of the water jet gun 100 is moved backward (towards the operator) is indicated as "-".

[0054] This restriction prevents pressurized water from being sprayed from the spray nozzle 102 at the tip of the barrel 101 of the water jet gun 100 onto the worker when the worker accidentally swings the water jet gun 100, thereby preventing the worker from being injured.

[0055] In this embodiment, of the upper roller holding section 20 and lower roller holding section 40 that make up the holding device 10, an example is shown in which the barrel support section 44 and slide mechanism 45 are arranged in the lower roller holding section 40, but it is also possible to provide the barrel support section 44 and slide mechanism 45 in the upper roller holding section 20.

[0056] In this embodiment, when the water jet gun 100 is swung, the angular range of the water jet gun 100 is limited by bringing the collar 64 fixed to the water jet gun 100 into contact with the stopper members 78a, 78b fixed to the casing member 62. However, the angular range of the water jet gun 100 may also be limited by bringing the clamp 63 fixed to the water jet gun 100 into contact with the stopper members 78a, 78b fixed to the casing member 62. In this case, it is desirable to fix the stopper members 78a, 78b to the front side of the casing member 62 rather than to the rear side of the casing member 62.

[0057] <Summary of effects> The water jet gun holding device 10 of the present invention comprises a holding frame 21 having a space SP into which a pair of single pipes 201, 202 arranged parallel to each other are inserted, an upper roller holding section 20 having a plurality of rollers 22, 23 that are journaled on the holding frame 21 and against which one single pipe 201 of the pair of single pipes 202, 202 inserted into the space SP abuts, and a roller holding section 20 for holding the pair of single pipes 201 in a state in which one single pipe 201 abuts against each of the plurality of rollers 22, 23. the lower roller holding portion 40 having a plurality of rollers 42, 43 that abut against the other single-tube pipe 202 of the pair of single-tube pipes 201, 202, and a holding frame 41 that supports each of the plurality of rollers 42, 43; a barrel support portion 44 that is provided on either the upper roller holding portion 20 or the lower roller holding portion 40 and supports the water jet gun 100 so that it can swing; and a slide mechanism 45 that can move the barrel support portion 44 in a direction that intersects with the extension direction of the pair of single-tube pipes 201, 202.

[0058] With this configuration, when the water jet gun holding device 10 is attached to a pair of single-tube pipes, the water jet gun holding device 10 can be moved in the direction of extension of the pair of single-tube pipes while maintaining a fixed position relative to the pair of single-tube pipes. This allows high-pressure water from the water jet gun to be sprayed at an appropriate angle toward the concrete structure. Furthermore, since the barrel 101 of the water jet gun 100 is held in the water jet gun holding device 10, the physical strain on the operator is reduced.

[0059] Furthermore, when the water jet gun holding device 10 is attached to the pair of single-tube pipes 201, 202, the water jet gun 100 is held in a position where the jet nozzle 102 at the tip is away from the operator. This prevents high-pressure water from being sprayed toward the operator when the water jet gun 100 is operated incorrectly. This improves safety during chipping work.

[0060] The device also includes a hinge 91 that can rotate the holding frame 21 and the holding frame 41 relatively between a fixed state in which one single pipe 201 is abutted against each of the rollers 22, 23 and each of the rollers 42, 43 is abutted against the other single pipe 202, and an open state in which each of the rollers 42, 43 retreats from a state in which it is abutted against the other single pipe 202 of the pair of single pipes 201, 202, and a snap lock 95 that holds the holding frame 21 and the holding frame 41 in a fixed state.

[0061] This allows the water jet gun holding device 10 to be attached to the pair of single pipes 201, 202 in a simple and appropriate manner. In addition, the water jet gun holding device 10 detached from the pair of single pipes 201, 202 can be easily transported.

[0062] The barrel support portion 44 is made up of a spherical bearing 61 to which the barrel 101 of the water jet gun 100 is fixed, and a casing member 62 that holds the spherical bearing 61.

[0063] With this, by swinging the water jet gun 100 relative to the barrel support portion 44, it becomes possible to jet high-pressure water at an appropriate angle depending on the state of peeling on the surface of the concrete structure.

[0064] In addition, the barrel 101 of the water jet gun 100 is fixed to the spherical bearing 61 via a clamp 63 and a collar 64, and the casing member is provided with stopper members 78a, 78b against which either the clamp 63 or the collar 64 abuts when the water jet gun swings.

[0065] This allows the angle range within which the water jet gun 100 swings relative to the barrel support portion 44 to be limited, thereby preventing injury to the worker caused by high-pressure water being sprayed onto the worker when the worker operates the water jet gun 100 incorrectly.

[0066] The slide mechanism 45 also includes a pair of carriages 71, 72 provided on the casing member 62, and a pair of guide rails 73, 74 to which the pair of carriages 71, 72 are respectively attached and which extend in a direction intersecting the extension direction of the pair of single-tube pipes 202, 202.

[0067] This makes it possible to maintain an appropriate distance between the jet nozzle 102 provided at the tip of the water jet gun 100 relative to the barrel support portion 44 and the concrete structure. [Explanation of symbols]

[0068] 10. Water jet gun holding device 20 Upper roller holding portion (first roller holding portion) 21 Holding frame (first frame) 22,23 Roller (1st Roller) 40 Lower roller holding portion (second roller holding portion) 41 Holding frame (second frame) 42,43 Roller (second roller) 44 Barrel support (support) 45 Slide mechanism 61 Spherical bearing 62 Casing member 63 Clamp 64 colors 78a, 78b Stopper members 71,72 Carriage 73,74 Guide rail 91 Hinge 95 Snap lock (retainer) 100 Water Jet Gun 101 gun barrel 201, 202, 211, 212 Single pipe

Claims

1. a first roller holding section including a first frame having a space into which a pair of single pipes arranged parallel to each other are inserted, and a plurality of first rollers journaled on the first frame and against which one of the pair of single pipes inserted into the space abuts; a second roller holding section including a plurality of second rollers that come into contact with the other of the pair of single pipes when the one single pipe is in contact with each of the plurality of first rollers, and a second frame that supports each of the plurality of second rollers; a support portion provided on either the first roller holding portion or the second roller holding portion, which supports the water jet gun so that the water jet gun can swing; a slide mechanism that can move the support portion in a direction intersecting the extending direction of the pair of single-tube pipes; A holding device for a water jet gun, comprising:

2. a hinge that can rotate the first frame and the second frame relatively between a first state in which, with one of the single pipes in contact with each of the plurality of first rollers, each of the plurality of second rollers is in contact with the other single pipe, and a second state in which each of the outer circumferential surfaces of the plurality of second rollers is retracted from the state in which it is in contact with the other of the pair of single pipes; a holder that holds the first frame and the second frame in the first state; 2. The water jet gun holding device according to claim 1, further comprising:

3. The support portion is a spherical bearing to which the barrel of the water jet gun is fixed; a casing member for holding the spherical bearing; 2. The water jet gun holding device according to claim 1, comprising:

4. The barrel of the water jet gun is fixed to the spherical bearing via a clamp and a collar, 4. The water jet gun holding device according to claim 3, wherein the casing member includes a stopper member against which one of the clamp and the collar abuts when the water jet gun swings.

5. The slide mechanism is a pair of carriages provided on the casing member; a pair of guide rails to which the pair of carriages are respectively attached and which extend in a direction intersecting the extending direction of the pair of single pipes; 4. The water jet gun holding device according to claim 3, further comprising:

Images