Water gun support device, water gun support stand, and method of working with a water gun

Abstract

This invention provides a water gun support device, a water gun support stand, and a water gun operation method that can reduce the workload and improve the freedom of operation. [Solution] The water gun support device 10 comprises a conduit support part 36 that movably supports the conduit 28 of the water gun 16 on the inner surface of the through hole 44, a displacement support part 38 that displaceably supports the conduit support part 36, a mounting part 40 that can be detachably attached to the object to be mounted 64, and a cover 42. The mounting part 40 has a clamp 66 that holds the object to be mounted 64. The minimum inner diameter of the through hole 44 is set to be larger than the maximum outer diameter of the conduit 28 and the spray nozzle 30, respectively, so that the operator can move the conduit 28 in the gap between the outer surface of the conduit 28 and the inner surface of the through hole 44. The water gun support stand 12 comprises the water gun support device 10, the object to be mounted 64, and a lifting mechanism 90 that raises and lowers the object to be mounted 64.

Description

Technical Field

[0001] The present invention relates to a water gun support device for supporting a water gun that injects high-pressure water, a water gun support stand, and a working method using these water guns.

Background Art

[0002] In operations such as chiseling concrete of buildings or roads, peeling paint films, and cleaning the outer walls of buildings, a water gun that injects high-pressure water toward the injection target may be used. A general water gun includes an injection nozzle, a grip held by the operator's hand, and a trigger pulled by the operator's finger, and is configured such that high-pressure water is injected from the injection nozzle when the trigger is pulled. Therefore, the operator has to suppress the movement of the water gun due to the reaction force when the high-pressure water is injected with their hand or the like, and there is a problem that the work burden is large.

[0003] Patent Document 1 below discloses a flexible gun stand (water gun support device) for a fluid jet gun that can reduce the work burden. This flexible gun stand includes a clamp mechanism attached to a scaffolding steel pipe or the like, a pan tilt rotatably provided on the clamp mechanism, and a gun body mounting body rotatably provided on the pan tilt. When the operator uses the fluid jet gun, the gun body is fixedly attached to the gun body mounting body. Therefore, the movement of the fluid jet gun due to the reaction force when the high-pressure water is injected can be suppressed by the gun body mounting body, the pan tilt, and the clamp mechanism, and the work burden can be reduced.

[0004] In the flexible gun stand of Patent Document 1, since the gun body mounting body and the pan tilt rotate, the movement of the fluid jet gun is allowed, so the operator can inject high-pressure water over a wide range while changing the direction of the injection nozzle. However, since the gun body of the fluid jet gun is fixedly attached to the gun body mounting body, there is a problem that the degree of freedom of operation is insufficient.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Utility Model Registration No. 3147784 Gazette [Overview of the project]

[0006] The present invention was made to address the above-mentioned problems, and aims to provide a water gun support device, a water gun support stand, and a water gun work method that can reduce the workload and improve the degree of freedom of operation.

[0007] To achieve the above objective, the water gun support device according to the present invention is characterized by being a water gun support device for supporting a water gun equipped with a conduit for guiding high-pressure water and a spray nozzle provided at the tip of the conduit, comprising: a conduit support part having a through hole through which the conduit passes and supporting the conduit movably on the inner surface of the through hole; a displacement support part that supports the conduit support part in a displaceable manner; and a mounting part provided on the displacement support part and detachably attached to an external object to be attached, wherein the minimum inner diameter of the through hole is set to be larger than the maximum outer diameter of the conduit and the spray nozzle, respectively.

[0008] In this configuration, the water gun's conduit is movably supported within the inner surface of the through-hole of the conduit support. This allows the conduit support to suppress the movement of the water gun caused by the reaction force when high-pressure water is sprayed, thereby reducing the workload. The minimum inner diameter of the through-hole is set to be larger than the maximum outer diameter of the conduit, allowing the operator to move the conduit to change its inclination angle with respect to the central axis of the through-hole, as well as move the conduit parallel to the central axis of the through-hole. Furthermore, since the conduit support is displaceably supported by the displacement support, if the inclination angle of the conduit with respect to the central axis of the through-hole reaches the limit of the conduit's range of motion, the conduit support is displaced, allowing the conduit to move. In addition, since the minimum inner diameter of the through-hole is set to be larger than the maximum outer diameter of both the spray nozzle and the conduit, the operator can also operate the water gun completely manually by pulling the conduit and spray nozzle out of the through-hole. Thus, the degree of freedom in operating the water gun can be improved.

[0009] Another feature of the water gun support device according to the present invention is that the conduit support portion is formed in a cylindrical shape.

[0010] In this configuration, since the conduit support is formed in a cylindrical shape, when the inclination angle of the conduit with respect to the central axis of the through-hole reaches the limit of the conduit's range of motion, the conduit comes into contact with two points located on the inner surfaces of both ends of the through-hole. Therefore, the conduit can be stably supported at these two points.

[0011] Another feature of the water gun support device according to the present invention is that the conduit support portion has a spherical outer surface formed in a spherical shape, and the displacement support portion has a spherical inner surface formed in a spherical shape so as to fit with the spherical outer surface.

[0012] In this configuration, the worker can move the conduit while keeping it in contact with the conduit support, thereby freely displacing the conduit support relative to the displacement support.

[0013] Another feature of the water gun support device according to the present invention is that when the portion constituting the spherical outer surface of the conduit support portion is defined as the spherical outer surface component, and the portion constituting the spherical inner surface of the displacement support portion is defined as the spherical inner surface component, the spherical outer surface component and the spherical inner surface component are composed of general-purpose spherical sliding bearings.

[0014] This configuration uses general-purpose spherical plain bearings, which reduces manufacturing costs.

[0015] Another feature of the water gun support device according to the present invention is that it is equipped with a cover that covers the conduit support portion and the displacement support portion.

[0016] For example, during concrete chipping work on a building, water and dust splashing back from the wall surface can enter the gaps between the conduit support and displacement support sections if there is no cover, making the cleaning process to remove them troublesome. In the above configuration, the conduit support and displacement support sections are covered, thus reducing the effort required for cleaning.

[0017] Another feature of the water gun support device according to the present invention is that the cover has a first cover portion that covers the conduit support portion and the displacement support portion from the front, a second cover portion that extends rearward from the peripheral edge of the first cover portion and is formed in a cylindrical shape, and a fixing portion for fixing the first cover portion to the conduit support portion, wherein the first cover portion has a cylindrical opening having an inner circumferential surface that contacts the outer circumferential surface of the front end of the conduit support portion, and the opening is placed over the front end of the conduit support portion and fixed by the fixing portion.

[0018] In this configuration, the first and second cover sections effectively cover the conduit support and displacement support sections. Furthermore, since the inner surface of the cylindrical opening contacts the outer surface of the front end of the conduit support section, gaps are unlikely to form between them, making it difficult for water, dust, etc., to enter the space inside the cover. In addition, since the cylindrical opening of the first cover section, which covers the conduit support and displacement support sections from the front, fits over the front end of the conduit support section, even if water or dust splashing back from the sprayed object strongly hits the first cover section, the first cover section is unlikely to detach from the conduit support section.

[0019] Another feature of the water gun support device according to the present invention is that the mounting portion has a clamp that holds the object to be mounted, which is formed in the shape of a rod.

[0020] In this configuration, the clamp can be moved axially and circumferentially relative to the rod-shaped object to be attached by loosening the clamping force.

[0021] Another feature of the water gun support device according to the present invention is that the displacement support portion has a rotatable support portion for rotatably supporting the conduit support portion.

[0022] In this configuration, the conduit support is rotatably supported by the rotating support, which expands the range of motion of the conduit and improves work efficiency.

[0023] To achieve the above objective, the water gun support device according to the present invention is characterized by having a connecting part that connects the water gun to one of the conduit support part, the displacement support part, and the mounting part, while the conduit is passing through the through hole, and the length of the connecting part is determined to be such that the conduit and the spray nozzle do not come out of the through hole.

[0024] This configuration prevents the water gun from detaching from the water gun support device.

[0025] In order to achieve the above object, the water gun support base according to the present invention is characterized in that it includes the water gun support device and a pedestal for supporting the water gun support device, the pedestal has the rod-shaped object to be attached, and a plurality of the water gun support devices are attached to the object to be attached with a space therebetween.

[0026] In this configuration, since a plurality of water gun support devices can be selectively used, workability can be improved.

[0027] In order to achieve the above object, the water gun support base according to the present invention is characterized in that it includes the water gun support device, the object to be attached to which the water gun support device is attached, and a lifting mechanism for raising and lowering the object to be attached.

[0028] In this configuration, since the object to be attached to which the water gun support device is attached can be raised and lowered by the lifting mechanism, the movable range of the conduit can be expanded and workability can be improved.

[0029] In order to achieve the above object, the working method using the water gun according to the present invention is a working method using the water gun with the water gun support device, and includes a step of attaching the attachment portion to the object to be attached, a step of passing the conduit through the through hole, and a step of moving the conduit inside the through hole while injecting high-pressure water from the injection nozzle.

[0030] In this configuration, since the above-described water gun support device is used, the working burden can be reduced and the degree of freedom of operation can be improved.

Brief Description of Drawings

[0031] [Figure 1] It is a side view showing a usage state of a water gun support device (excluding the cover) and a water gun support base according to an embodiment. [Figure 2]This is a front view showing the configuration of a water gun support stand (excluding the cover) according to the embodiment. [Figure 3] (A) is a perspective view showing the water gun support device (excluding the cover) in use, and (B) is a front perspective view showing the configuration of the water gun support device (excluding the cover). [Figure 4] (A) is a front view showing the configuration of the water gun support device (excluding the cover), and (B) is a partial cross-sectional view of (A) along the line IVB-IVB. [Figure 5] (A) is a perspective view showing the water gun support device in use, and (B) is a front perspective view showing the configuration of the water gun support device. [Figure 6] This diagram illustrates the operation method using a water gun. (A) is a partial cross-sectional view showing how the conduit is moved inside the through-hole. (B) is a partial cross-sectional view showing the conduit support being displaced at the displacement support. (C) is a partial cross-sectional view showing the entire water gun support device being rotated by loosening the clamp at the mounting part. [Figure 7] These figures show modified versions of the conduit support and displacement support, where (A) is a partial cross-sectional view showing the first modified version, (B) is a partial cross-sectional view showing the second modified version, (C) is a partial cross-sectional view showing the third modified version, and (D) is a partial cross-sectional view showing the fourth modified version. [Figure 8] This is a perspective view showing the water gun support device and the water gun connected at the connecting part. [Modes for carrying out the invention]

[0032] The following describes the water gun support device, water gun support stand, and water gun operation method according to the present invention with reference to the drawings.

[0033] Figure 1 is a side view showing the usage state of the water gun support device 10 (excluding the cover) and the water gun support stand 12 according to the embodiment. As shown in Figure 1, a typical high-pressure water spray system 14 used for tasks such as chipping concrete in buildings and roads, stripping paint films, and cleaning the exterior walls of buildings comprises a water gun 16, a high-pressure water generator 18, a water supply pipe 20 for supplying high-pressure water generated by the high-pressure water generator 18 to the water gun 16, and an on / off valve 20a provided in the water supply pipe 20.

[0034] The water gun 16 comprises a main body 22 connected to the downstream end of the water supply pipe 20, a grip 24 provided on the main body 22, a trigger 26, a conduit 28, a spray nozzle 30 provided at the tip of the conduit 28, and a reaction force support part 32. The conduit 28 is the part that guides high-pressure water from the main body 22 to the spray nozzle 30, and is formed in the shape of a long, slender rod. The reaction force support part 32 is a member for receiving the reaction force when high-pressure water is sprayed from the spray nozzle 30 on the chest of an operator (not shown), and is formed to extend along the extension of the central axis of the conduit 28.

[0035] When the trigger 26 is pulled by the fingers of the operator holding the grip 24, high-pressure water is supplied from the main body 22 to the conduit 28, and this high-pressure water is sprayed from the spray nozzle 30 towards the target object W. At this time, the operator works while receiving the reaction force from the spray of high-pressure water with their hands, arms, chest, etc. However, if the water gun 16 is operated completely manually, the workload becomes too great. Therefore, a water gun support device 10 and a water gun support stand 12 are used to reduce the workload.

[0036] (Configuration of the water gun support stand according to the embodiment) Figure 2 is a front view showing the configuration of a water gun support stand 12 (excluding the cover) according to an embodiment. The water gun support stand 12 shown in Figure 2 comprises two water gun support devices 10 and a frame 34 that supports the two water gun support devices 10. In other words, the water gun support devices 10 and the frame 34 are part of the water gun support stand 12. Below, the configuration of the water gun support devices 10 will be described first, followed by the configuration of the frame 34.

[0037] (Configuration of the water gun support device) Figure 3(A) is a perspective view showing the water gun support device 10 (excluding the cover) in use, and Figure 3(B) is a front perspective view showing the configuration of the water gun support device 10 (excluding the cover). Figure 4(A) is a front view showing the configuration of the water gun support device 10 (excluding the cover), and Figure 4(B) is a partial cross-sectional view taken along the line IVB-IVB in Figure 4(A). Figure 5(A) is a perspective view showing the water gun support device 10 in use, and Figure 5(B) is a front perspective view showing the configuration of the water gun support device 10.

[0038] The water gun support device 10 shown in Figures 3(A) and 3(B) is a device for supporting a water gun 16 which is equipped with a conduit 28 for guiding high-pressure water and a spray nozzle 30 provided at the tip of the conduit 28, and comprises a conduit support part 36, a displacement support part 38, a mounting part 40, and a cover 42.

[0039] The conduit support portion 36 shown in Figures 4(A) and 4(B) is a portion having a through-hole 44 through which the conduit 28 (Figure 3(A)) passes, and is configured to movably support the conduit 28 on the inner surface of the through-hole 44.

[0040] As shown in Figure 4(B), the conduit support portion 36 has a cylindrical straight pipe portion 46 and an annular spherical outer surface component portion 48 that constitutes a spherical outer surface 48a, and the spherical outer surface component portion 48 is joined to the outer circumferential surface of the straight pipe portion 46. In other words, the conduit support portion 36 has a spherically formed spherical outer surface 48a. The spherical outer surface 48a is formed to fit and slide with the spherical inner surface 52a of the displacement support portion 38, which will be described later. The water gun support device 10 of this embodiment has a general-purpose spherical sliding bearing 50, and the spherical outer surface component portion 48 is made up of the inner part of the general-purpose spherical sliding bearing 50.

[0041] The minimum inner diameter of the through-hole 44, i.e., the inner diameter of the straight pipe section 46, is set to be larger than the maximum outer diameters of the conduit 28 and the injection nozzle 30 (Figure 3(A)), respectively, and the length of the through-hole 44, i.e., the length of the straight pipe section 46, is set to be sufficiently longer than the length of the spherical outer surface component 48. The material of the conduit support section 36 is not particularly limited, but in this embodiment, polyvinyl chloride is used.

[0042] The displacement support portion 38 shown in Figures 4(A) and 4(B) is a part that supports the conduit support portion 36 in a displaceable manner, and is configured so that the central axis P of the through hole 44 of the conduit support portion 36 can be tilted in all directions: up and down, left and right, and diagonally.

[0043] As shown in Figure 4(B), the displacement support portion 38 has an annular spherical inner surface component 52 that constitutes the spherical inner surface 52a, and a holder portion 54 that supports the spherical inner surface component 52. In other words, the displacement support portion 38 has a spherically formed spherical inner surface 52a. The spherical inner surface 52a is formed to fit and slide with the spherical outer surface 48a of the conduit support portion 36. The water gun support device 10 of this embodiment has a general-purpose spherical sliding bearing 50, and the spherical inner surface component 52 is made up of the outer part of the general-purpose spherical sliding bearing 50.

[0044] As shown in Figure 4(B), the holder portion 54 includes a base portion 56, a plate 58 joined to the upper end of the base portion 56, and a holder body 60. The holder body 60 has a through hole 60a into which a spherical inner surface component 52 is fitted and fixed, and two screw holes 60b are formed at the bottom of the holder body 60. The plate 58 has two through holes (not shown) corresponding to the two screw holes 60b, and the holder body 60 is fixed to the plate 58 by screwing bolts 62 inserted through these through holes into the screw holes 60b.

[0045] As shown in Figures 4(A) and 4(B), the mounting portion 40 is provided on the displacement support portion 38 and is a part that can be detachably attached to an external object to be mounted 64, and has a clamp 66 that grips the rod-shaped object to be mounted 64.

[0046] The clamp 66 includes a first clamp piece 68, a second clamp piece 70, a hinge portion 72 (Figure 4(B)), and fastening bolts 74a and nuts 74b. The first clamp piece 68 and the second clamp piece 70 are shaped to conform to the outer circumferential surface of the object to be attached 64, and one end of the first clamp piece 68 and the second clamp piece 70 are rotatably connected to each other via the hinge portion 72. A bolt support portion 68a is formed at the other end of the first clamp piece 68 to rotatably support one end of the bolt 74a, and a hook portion 70a is formed at the other end of the second clamp piece 70 to hook onto the nut 74b screwed onto the other end of the bolt 74a.

[0047] When an operator attaches the clamp 66 to the object 64, they first open the first clamp piece 68 and the second clamp piece 70 and place them over the object 64. Next, they close the first clamp piece 68 and the second clamp piece 70 to clamp the object 64, and then hook the nut 74b onto the hook portion 70a and tighten it.

[0048] In this embodiment, the displacement support portion 38 is fixed to the mounting portion 40 using connecting parts 75 such as bolts and nuts. In other words, the displacement support portion 38 does not rotate relative to the mounting portion 40, and the conduit support portion 36 does not displace relative to the mounting portion 40.

[0049] The cover 42 shown in Figure 3(A) is a member that covers the conduit support portion 36 and the displacement support portion 38. As shown in Figure 5(A), it has a first cover portion 76 that covers the conduit support portion 36 and the displacement support portion 38 from the front, and a second cover portion 78 that extends rearward from the peripheral edge of the first cover portion 76 and is formed in a cylindrical shape. Also, as shown in Figure 5(B), the cover 42 has a fixing portion 80 for fixing the first cover portion 76 to the conduit support portion 36.

[0050] As shown in Figure 5(B), the first cover portion 76 is formed in a smoothly curved, circular dish shape that bulges forward. Furthermore, the first cover portion 76 is made of a thick, elastic material to absorb the impact of water, dust, and other particles bouncing back from the object to be sprayed W (Figure 1).

[0051] A cylindrical opening 82 is formed in the center of the first cover portion 76, having an inner surface that contacts the outer surface of the front end of the conduit support portion 36 (Figure 3(B)). The opening 82 is placed over the front end of the conduit support portion 36 and fixed with a fixing portion 80. In this embodiment, the fixing portion 80 is a general-purpose metal band. The type of fixing portion 80 is not particularly limited, and a band made of synthetic resin or a ring made of metal or synthetic resin may be used.

[0052] As shown in Figure 5(B), the second cover portion 78 is formed in a circular cylindrical shape. Furthermore, the second cover portion 78 is made of a flexible material and is thinner than the first cover portion 76 so that it can be deformed in accordance with the movement of the conduit 28. The front end of the second cover portion 78 is placed over the outer circumference of the first cover portion 76 and fixed with a fixing portion 84. In this embodiment, the fixing portion 84 is a general-purpose metal band. However, the type of fixing portion 84 is not particularly limited, and a band made of synthetic resin or a ring made of metal or synthetic resin may be used.

[0053] (Configuration of the mounting structure) The frame 34 shown in Figure 2 includes a lifting frame 86 that includes the object to be mounted 64, tubular left leg portion 88a and right leg portion 88b with open upper ends, and a lifting mechanism 90 for raising and lowering the lifting frame 86. In this embodiment, two water gun support devices 10 are attached to the object to be mounted 64 at intervals from each other.

[0054] The lifting frame 86 has a tubular left support column 92a, a tubular right support column 92b, and a tubular connecting section 94 that connects them. The object to be mounted 64 is horizontally spanned between the upper end of the left support column 92a and the upper end of the right support column 92b, and the connecting section 94 is horizontally spanned downward from the object to be mounted 64 at a distance. The internal spaces of the left support column 92a, the right support column 92b, and the connecting section 94 are in communication with each other in order to incorporate the lifting mechanism 90. The left support column 92a is inserted into the left leg portion 88a, and the right support column 92b is inserted into the right leg portion 88b.

[0055] The lifting mechanism 90 includes a left coil spring 96a that receives the left support column 92a inside the left leg portion 88a, a right coil spring 96b that receives the right support column 92b inside the right leg portion 88b, a left pull-down wire 98a, a right pull-down wire 98b, and a wire winder 100. The lifting mechanism 90 also includes a pulley 102 attached to the top of the left support column 92a, a pulley 104a attached to the top of the right support column 92b, and a pulley 104b attached to the bottom of the right support column 92b.

[0056] The wire winder 100 includes a rotating shaft 100a provided on the connecting section 94, a handle 100b for rotating the rotating shaft 100a by the operator's hand, a winding pulley 100c and a stopper plate 100d provided on the rotating shaft 100a, and a stopper pin 100e. The left-side down wire 98a is wound around the pulley 102, with one end fixed to the winding pulley 100c and the other end fixed to the lower part of the left-side support column 92a. The right-side down wire 98b is wound around the pulleys 104a and 104b, with one end fixed to the winding pulley 100c and the other end fixed to the upper part of the right-side support column 92b.

[0057] Therefore, when the handle 100b of the wire winder 100 is rotated in the direction of the arrow, the left pull-down wire 98a and the right pull-down wire 98b are pulled in the direction of the arrow, and the lifting frame 86 is lowered in the direction of the white arrow against the biasing force of the left coil spring 96a and the right coil spring 96b.

[0058] The stopper plate 100d is formed in the shape of a disc with a diameter larger than the outer diameter of the connecting portion 94, and a plurality of through holes 106 are formed on the outer circumference of the stopper plate 100d at intervals in the circumferential direction. When a stopper pin 100e is inserted into one of the through holes 106, the stopper pin 100e contacts the connecting portion 94, preventing the rotation of the stopper plate 100d and the rotating shaft 100a.

[0059] (Water gun operation method) Figure 6 shows the working method using the water gun 16. Figure 6(A) is a partial cross-sectional view showing how the conduit 28 is moved inside the through hole 44. Figure 6(B) is a partial cross-sectional view showing the state in which the conduit support part 36 is displaced by the displacement support part 38. Figure 6(C) is a partial cross-sectional view showing the state in which the clamp 66 of the mounting part 40 is loosened and the entire water gun support device 10 is rotated.

[0060] The method of using a water gun 16 with the water gun support device 10 shown in Figure 1 comprises the steps of: the worker attaching the mounting part 40 of the water gun support device 10 to the object to be attached 64; the worker passing the conduit 28 of the water gun 16 through the through hole 44 (Figure 4(B)) of the conduit support part 36; and the worker moving the conduit 28 inside the through hole 44 while spraying high-pressure water from the spray nozzle 30.

[0061] As shown in Figure 6(A), in the process of moving the conduit 28 inside the through-hole 44 while spraying high-pressure water from the spray nozzle 30, the worker uses the gap between the inner surface of the through-hole 44 and the outer surface of the conduit 28 to tilt the conduit 28 in the up and down, left and right, and diagonally directions. In addition, the worker moves the conduit 28 in the forward and backward directions as needed. This allows the worker to secure a wide working area.

[0062] As shown in Figure 6(B), when the inclination angle of the conduit 28 with respect to the central axis P of the through hole 44 (Figures 4(A), (B)) reaches the limit of the conduit 28's range of motion inside the through hole 44, the worker displaces the conduit support 36 by pushing the conduit 28 against it. This allows the worker to further incline the conduit 28, thereby widening the working range.

[0063] As shown in Figure 6(C), when the operator wants to tilt the conduit 28 further beyond the range of displacement of the conduit support 36, the operator loosens the clamp 66 of the mounting part 40, thereby rotating the entire water gun support device 10 around the object to be attached 64. This allows the operator to tilt the conduit 28 further and secure a wider working range.

[0064] As shown in Figure 2, the worker can secure a wide working range by raising and lowering the lifting frame 86, which includes the object to be attached 64, using the lifting mechanism 90, and can also secure a wide working range by loosening the clamp 66 and moving the entire water gun support device 10 in the left-right direction (arrow direction). Furthermore, a wide working range can also be secured by selectively using two water gun support devices 10.

[0065] (Effects of the embodiment) According to the embodiment, the above configuration can achieve the following effects. Specifically, since the conduit 28 of the water gun 16 is movably supported on the inner surface of the through hole 44 of the conduit support part 36, the movement of the water gun 16 due to the reaction force when high-pressure water is sprayed can be suppressed by the conduit support part 36, thereby reducing the workload. In addition, as shown in Figures 6(A), (B), (C) and Figure 2, the degree of freedom in operating the water gun 16 can be improved, and a wider working range can be secured. The operator can also operate the water gun 16 completely manually by pulling out the conduit 28 and spray nozzle 30 from the through hole 44.

[0066] Since the conduit support portion 36 is formed in a cylindrical shape, when the inclination angle of the conduit 28 with respect to the central axis P of the through hole 44 reaches the limit of the conduit 28's range of motion, the conduit 28 comes into contact with two points located on the inner surfaces of both ends of the through hole 44. Therefore, the conduit 28 can be stably supported at these two points.

[0067] Since a general-purpose spherical plain bearing 50 is used, manufacturing costs can be reduced.

[0068] Since the conduit support section 36 and the displacement support section 38 are covered by the cover 42, the effort required for cleaning the water gun support device 10 can be reduced. Also, since the inner surface of the cylindrical opening 82 is in contact with the outer surface of the front end of the conduit support section 36, gaps are unlikely to form between them, making it difficult for water, dust, etc. to enter the space inside the cover 42. Furthermore, since the cylindrical opening 82 of the first cover section 76 that covers the conduit support section 36 and the displacement support section 38 from the front is placed over the front end of the conduit support section 36, even if water or dust splashing back from the object to be sprayed W hits the first cover section 76 hard, the first cover section 76 is unlikely to detach from the conduit support section 36.

[0069] (modified version) In carrying out the present invention, the invention is not limited to the above embodiments, and various modifications are possible as long as they do not depart from the object of the invention. That is, in the above embodiments, the conduit support portion 36 is composed of a straight pipe portion 46 and an annular spherical outer surface component portion 48, but these may be composed as a single integrated component.

[0070] In the above embodiment, the mounting portion 40 has a clamp 66, but the type of mounting portion 40 is not particularly limited, and for example, a fastening belt, bolts and nuts may be used instead of the clamp 66.

[0071] In the above embodiment, the cover 42 shown in Figure 5(B) is formed by dividing it into a first cover portion 76 and a second cover portion 78, but these may be formed as a single unit.

[0072] In the above embodiment, two water gun support devices 10 are attached to the object 64 to which the water gun support stand 12 shown in Figure 2 is mounted. However, the number of water gun support devices 10 is not particularly limited; there may be one or three or more.

[0073] In the above embodiment, the lifting frame 86 shown in Figure 2 is raised and lowered by a manual lifting mechanism 90. However, the drive method of the lifting mechanism 90 is not particularly limited and may be an electric system or a system using a gas cylinder.

[0074] The lifting mechanism 90 does not necessarily have to be configured to raise or lower the lifting frame 86; it may be configured to raise or lower a simpler part, including the object to be attached 64. Furthermore, the lifting mechanism 90 is not always necessary; for example, if a worker constructs a frame of the desired height by appropriately connecting single pipes used for scaffolding, the lifting mechanism 90 may be omitted.

[0075] In the above embodiment, the displacement support portion 38 is fixed to the mounting portion 40 using the connecting portion 75, but the displacement support portion 38 may be rotatably connected to the mounting portion 40 via the rotating support portion. In this case, the rotating support portion functions as a displacement support portion that displaces the conduit support portion 36. In other words, the displacement support portion 38 has a rotating support portion for rotatably supporting the conduit support portion 36. Therefore, the range in which the worker can move the conduit 28 can be further expanded, improving work efficiency.

[0076] In the above embodiment, the conduit support portion 36 has a straight pipe portion 46 and a spherical outer surface component portion 48, and the displacement support portion 38 has a spherical inner surface component portion 52 and a holder portion 54, but these configurations may be changed as appropriate. For example, the straight pipe portion 46 and the spherical outer surface component portion 48 of the conduit support portion 36 may be formed integrally. Furthermore, the following modifications may be adopted.

[0077] Figure 7 shows modified examples of the conduit support section 36 and the displacement support section 38, where Figure 7(A) is a partial cross-sectional view showing the first modified example, Figure 7(B) is a partial cross-sectional view showing the second modified example, Figure 7(C) is a partial cross-sectional view showing the third modified example, and Figure 7(D) is a partial cross-sectional view showing the fourth modified example. In the modified examples shown in Figures 7(A) to (D), the degree of freedom of operation of the water gun 16 can be improved and a wider working range can be secured.

[0078] In the first modified example shown in Figure 7(A), an elastic cylindrical body 107 made of an elastic material such as rubber is used instead of a general-purpose spherical sliding bearing 50. In this configuration, the conduit support portion 36 can be displaced by deforming the elastic cylindrical body 107.

[0079] In the second modified example shown in Figure 7(B), a rotatable support part 108 is used instead of the fixed connection part 75, and the spherical sliding bearing 50 is omitted. In other words, in the second modified example, the displacement support part 38 is composed solely of the rotatable support part 108.

[0080] In the third modified example shown in Figure 7(C), a rotatable support part 108 is used instead of the fixed connector part 75, and the spherical sliding bearing 50 is omitted. Also, a plate-shaped part 110 with a through hole 44 is used instead of the straight pipe part 46 of the conduit support part 36. The plate-shaped part 110 is directly connected to the plate 58 by welding or the like.

[0081] In the fourth modified example shown in Figure 7(D), the straight pipe section 46 is directly connected to the plate 58 by welding or the like, and the plate 58 is connected to the mounting section 40 using a ball joint 112. In other words, in the fourth modified example, the displacement support section 38 is composed solely of a ball joint 112.

[0082] Figure 8 is a perspective view showing the water gun support device 10 and the water gun 16 connected by a connecting part 116. In the above embodiment, the reaction force when high-pressure water is sprayed from the spray nozzle 30 may cause the water gun 16 to move backward and detach from the water gun support device 10. To solve this problem, the connecting part 116 shown in Figure 8 may be used. The connecting part 116 is a member that connects the water gun support device 10 (any one of the conduit support part 36, displacement support part 38, and mounting part 40) and the water gun 16 while the conduit 28 is passing through the through hole 44.

[0083] As shown in Figure 8, the connecting portion 116 has a wire 118, a first hook 120 provided at one end of the wire 118, and a second hook 122 provided at the other end of the wire 118, with the first hook 120 hooked onto an annular hook-hooking portion 124 provided on the water gun support device 10. When the operator passes the conduit 28 of the water gun 16 through the through hole 44, the second hook 122 is hooked by the operator onto the annular hook-hooking portion 126 provided on the water gun 16. The length of the connecting portion 116 (i.e., the length of the wire 118) is set so that the conduit 28 and the spray nozzle 30 do not come out of the through hole 44. By using the connecting portion 116, it is possible to prevent the water gun 16 from detaching from the water gun support device 10. [Explanation of Symbols]

[0084] W...Object to be sprayed, 10...Water gun support device, 12...Water gun support stand, 14...High-pressure water spray system, 16...Water gun, 18...High-pressure water generator, 20...Water supply pipe, 20a...On / off valve, 22...Main body, 24...Grip, 26...Trigger, 28...Conduit, 30...Spray nozzle, 32...Reaction force support part, 34...Stand, 36...Conduit support part, 38...Displacement support part, 40...Mounting part, 42...Cover, 44...Through hole, 46...Straight Tube section, 48...Spherical outer surface component, 48a...Spherical outer surface, 50...Spherical sliding bearing, 52...Spherical inner surface component, 52a...Spherical inner surface, 54...Holder section, 56...Base section, 58...Plate, 60...Holder body, 60a...Through hole, 60b...Screw hole, 62...Bolt, 64...Object to be attached, 66...Clamp, 75...Connecting section, 68...First clamp piece, 68a...Bolt support section, 70...Second clamp piece, 70a...Hooking section, 72... Hinge section, 74a…bolt, 74b…nut, 76…first cover section, 78…second cover section, 80…fixing section, 82…opening, 84…fixing section, 86…lifting frame, 88a…left leg section, 88b…right leg section, 90…lifting mechanism, 92a…left support column, 92b…right support column, 94…connecting section, 96a…left coil spring, 96b…right coil spring, 98a…left pull-down wire, 98b…right pull-down wire, 100…wire winding Container, 100a...rotating shaft, 100b...handle, 100c...winding pulley, 100d...stopper plate, 100e...stopper pin, 102, 104a, 104b...pulley, 106...through hole, 107...elastic cylindrical body, 108...rotating support part, 110...plate-shaped part, 112...ball joint, 116...connecting part, 118...wire, 120...first hook, 122...second hook, 124, 126...hook attachment part.

Claims

1. A water gun support device for supporting a water gun equipped with a conduit for guiding high-pressure water and a spray nozzle provided at the tip of the conduit, A conduit support portion having a through hole through which the conduit passes, and supporting the conduit movably on the inner surface of the through hole, A displacement support portion that supports the aforementioned conduit support portion in a displaceable manner, The displacement support portion is provided with a mounting portion which can be detachably attached to an external object to be attached, A water gun support device wherein the minimum inner diameter of the through-hole is set to be larger than the maximum outer diameter of the conduit and the injection nozzle, respectively.

2. The water gun support device according to claim 1, wherein the conduit support portion is formed in a cylindrical shape.

3. The conduit support portion has a spherical outer surface formed in a spherical shape, The water gun support device according to claim 2, wherein the displacement support portion has a spherical inner surface formed to fit with the spherical outer surface.

4. The portion of the conduit support portion that constitutes the spherical outer surface is defined as the spherical outer surface component. When the portion constituting the spherical inner surface of the displacement support portion is defined as the spherical inner surface component, The water gun support device according to claim 3, wherein the spherical outer surface component and the spherical inner surface component are made of general-purpose spherical sliding bearings.

5. The water gun support device according to claim 4, further comprising a cover that covers the conduit support portion and the displacement support portion.

6. The cover comprises a first cover portion that covers the conduit support portion and the displacement support portion from the front, a second cover portion that extends rearward from the peripheral edge of the first cover portion and is formed in a cylindrical shape, and a fixing portion for fixing the first cover portion to the conduit support portion. The first cover portion has a cylindrical opening having an inner surface that contacts the outer surface of the front end of the conduit support portion. The water gun support device according to claim 5, wherein the opening is placed over the front end of the conduit support and fixed by the fixing part.

7. The water gun support device according to any one of claims 1 to 6, wherein the mounting portion has a clamp that holds the object to be mounted, which is formed in the shape of a rod.

8. The water gun support device according to any one of claims 1 to 6, wherein the displacement support portion has a rotatable support portion for rotatably supporting the conduit support portion.

9. With the conduit passing through the through hole, the water gun is provided with a connecting portion that connects one of the conduit support portion, the displacement support portion, and the mounting portion. The water gun support device according to any one of claims 1 to 6, wherein the length of the connecting portion is determined to such an extent that the conduit and the spray nozzle do not come out of the through hole.

10. A water gun support device according to any one of claims 1 to 6, and a frame for supporting the water gun support device, The aforementioned mounting frame has a rod-shaped object to be attached, A water gun support stand in which multiple water gun support devices are attached to the object to be mounted at intervals from each other.

11. A water gun support stand comprising a water gun support device according to any one of claims 1 to 6, an object to which the water gun support device is attached, and a lifting mechanism for raising and lowering the object to which the device is attached.

12. A method of working with a water gun using a water gun support device according to any one of claims 1 to 6, A step of attaching the mounting part to the object to be attached, The process of passing the conduit through the through hole, A method of working with a water gun, comprising the steps of moving the conduit inside the through hole while spraying high-pressure water from the spray nozzle.

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