Auxiliary tools for high-pressure water injection systems

Abstract

To provide an auxiliary tool for a high-pressure water spraying device with a simple configuration that allows the spray nozzle operating section to move smoothly along the floor surface during operations such as chipping in confined spaces. [Solution] By using an auxiliary device for a high-pressure water spraying device, which includes a mounting part that detachably holds the spray nozzle operating part, a support part that supports the mounting part, and a spherical wheel running part that has a spherical wheel provided on the lower surface of the support and supported so as to be freely rotatable, the spray nozzle operating part can be freely moved along the floor surface in narrow spaces simply by fixing the spray nozzle operating part to the mounting part of the auxiliary device for a high-pressure water spraying device, without using a frame such as a guide rail.

Description

Technical Field

[0001] The present invention relates to a high-pressure water jet device that injects and collides high-pressure water or ultra-high-pressure water (hereinafter, in the present specification and claims, simply referred to as "high-pressure water" as a term including both high-pressure water and ultra-high-pressure water) onto the surfaces of roads, bridges, pipes, and other structures to perform peeling treatment, such as peeling off the surface of the structure, or cleaning treatment. In particular, in a narrow place (narrow portion) where the upper and lower wall surfaces face each other at a narrow interval, such as a narrow portion where the work object is sandwiched between walls, an injection nozzle that injects high-pressure water from the tip is inserted, and when performing peeling treatment or cleaning treatment work, it relates to an auxiliary tool for high-pressure water treatment that can improve the movement and operability of the injection nozzle.

[0002] The high-pressure water treatment device is mainly used for peeling treatment, which peels off a desired material, such as concrete, that constitutes a structure from the surface layer to a predetermined depth, or for cleaning treatment, such as removing firmly adhered paint, rust, dirt, and stains on the surfaces of concrete and metal, inside various pipes and water pipes, etc., and cleaning the surface and inside (hereinafter, for the sake of convenience of explanation, combining peeling treatment, cleaning treatment, paint / rust removal treatment, and removal treatment of other unnecessary substances by high-pressure water, simply referred to as "peeling treatment, etc.").

Background Art

[0003] In operations such as peeling treatment in narrow places such as roads and bridges, it is necessary to smoothly move a nozzle that injects high-pressure water (hereinafter, appropriately referred to as a "water jet nozzle", "WJ nozzle", or "injection nozzle") along the work area surface of the peeling treatment or other work to be performed. In order to smoothly and stably move the injection nozzle while suppressing the recoil of high-pressure water, an auxiliary tool as shown in FIG. 8 has been proposed as a conventional technique (see Patent Document 1: FIG. 8). The auxiliary tool described in Patent Document 1 is provided with a support body portion that can slide and move in the X-Y direction (two-dimensional direction) as shown in FIG. 8, and a part of the high-pressure water pipe 6 that supplies high-pressure water to the injection nozzle is attached to the support body portion so as to be rotatable in the vertical direction, and the injection nozzle provided at the tip of the operation portion can freely move in the X-Y direction. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2018-76687 [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] In the prior art described in Patent Document 1, as shown in Figure 8, two forward-reverse moving rails 8 and a lateral moving rail 9 are provided on the floor surface of the work area at a predetermined distance apart. The lateral moving rail 9 straddles the two forward-reverse moving rails 8 and is provided so as to be slidable in the forward-reverse direction along the forward-reverse moving rails 8. The middle section of the high-pressure water pipe 6 is pivotally attached (pivot-connected) to a pivot connection part that is provided so as to be slidable laterally on the lateral moving rail 9, so as to be able to swing up and down. Since the high-pressure water pipe 6 pivotally attached to the pivot connection part can move freely in the XY direction along each rail 8, 9, it is possible to move the spray nozzle 5 provided at the tip of the high-pressure water pipe 6 freely in the XY direction along the floor surface in the work area.

[0006] However, the auxiliary device described in Patent Document 1 has the following problems. In chipping work using high-pressure water, relatively large fragments and residues such as concrete fragments crushed by the high-pressure water fall onto the floor. In the conventional auxiliary device disclosed in Patent Document 1, two forward-reverse moving rails 8 and a lateral moving rail 9 that straddles them are laid on the floor. Therefore, falling onto the floor Relatively large pieces of concrete and other debris are difficult to move because they are obstructed by these rails, and therefore tend to accumulate between the two forward / backward moving rails 8 and the lateral moving rail 9 without being discharged.

[0007] In particular, in confined spaces with narrow vertical gaps, fragments and residues fall near the spray nozzle, making it easier for larger concrete fragments and other debris to accumulate in the work area near the spray nozzle. As a result, when chipping work progresses and large fragments and residues accumulate between the rails, it becomes difficult to freely move the high-pressure water pipe 6 along the forward / backward moving rail 8 and the lateral moving rail 9. Therefore, the position of the spray nozzle 5 cannot be freely moved, which poses a problem as it makes chipping work difficult. Furthermore, in Patent Document 1, it is necessary to lay the forward / backward moving rail 8 and the lateral moving rail 9 before the chipping work, requiring a lot of time for preparatory work before the work begins.

[0008] This invention addresses the problems of the prior art and aims to provide an auxiliary tool for a high-pressure water injection device that requires minimal preparation work, facilitates the discharge of crushed fragments and residues from the work area, and allows for smooth movement of the injection nozzle, all while having a simple structure. [Means for solving the problem]

[0009] To achieve the above objective, the auxiliary device for a high-pressure water spraying device according to the first aspect of the present invention is an auxiliary device for a high-pressure water spraying device that supports and moves a spray nozzle operating unit that performs chipping, cleaning, and other work by spraying high-pressure water at a desired position on a wall or floor in a narrow space sandwiched between spaced walls and a floor, The invention is characterized by comprising: a mounting portion for detachably holding the injection nozzle operating portion; a support portion for supporting the mounting portion; and a spherical wheel running portion provided on the lower surface of the support portion and equipped with a spherical wheel that is supported so as to be freely rotatable.

[0010] Since the spray nozzle operating unit can be attached to the mounting part of the support unit, it is possible to select and attach auxiliary equipment for high-pressure water spraying devices of different sizes and shapes suitable for the work, depending on the height and width from the floor to the ceiling of the confined space. In addition, since the spherical wheels provided on the underside of the support unit can rotate in any direction, it can be moved freely without the need for rails for movement as in conventional technology, and the spray nozzle can be moved to the desired position.

[0011] Therefore, unlike conventional technology, there is no frame such as rails, making it easier to discharge debris such as crushed pieces and rubble, and facilitating the movement of the nozzle during chipping and other operations. In addition, the spherical wheels have a small contact surface with the floor and are supported to allow free rotation. As a result, the nozzle operating unit does not need to be pivotally attached to the mounting unit; simply fixing it to the mounting unit allows the spray nozzle to be moved up and down by moving the nozzle operating unit up and down using the spherical wheels as a fulcrum. Furthermore, preparation work before starting work is extremely simple compared to conventional rail installation, and this auxiliary device for high-pressure water spraying devices significantly improves work efficiency.

[0012] The auxiliary device for the high-pressure water jetting device described above preferably includes two or more spherical wheel running sections. Furthermore, the spherical wheel running section may be configured to include support legs extending from the support in the direction of the floor, with the spherical wheel being supported at the floor-facing end of the support leg. By providing two or more spherical wheel running sections, the nozzle operating section can be moved stably. Additionally, by providing multiple auxiliary devices for high-pressure water spraying systems equipped with support legs of different heights, it becomes easy to use an auxiliary device for high-pressure water spraying systems of a height appropriate to the size of the gap in a narrow space.

[0013] Furthermore, the support legs may be integrally fixed to the support body, but it is preferable that they be fixed to the support body in a replaceable manner. It is preferable that all replaceable support legs are configured to include a height adjustment mechanism.

[0014] By making the support legs interchangeable, multiple support legs of different lengths or shapes can be prepared, allowing for adaptation to various narrow spaces with a smaller number of units. Furthermore, by incorporating a height adjustment mechanism, the number of types of spherical wheel running sections or support legs with different heights can be reduced, making it possible to fine-tune the height of the auxiliary device for the high-pressure water injection system according to the spacing of the narrow space.

[0015] Furthermore, an auxiliary device for a high-pressure water jetting device according to another aspect of the present invention is characterized by comprising one or more anti-tipping parts fixed to the side of the support portion opposite to the support legs and extending so as to contact the ceiling surface or to the vicinity of the ceiling surface. The anti-tipping parts may be fixed integrally with the support portion, or they may be fixed in a manner that allows them to be removed or replaced. In addition, it is preferable that the anti-tipping parts are equipped with height adjustment parts.

[0016] By providing an anti-tipping section extending towards the ceiling on the opposite side of the support legs of the support structure, the auxiliary device for the high-pressure water spraying system is prevented from tipping over or tilting significantly. Furthermore, by making the anti-tipping section replaceable and by providing a height adjustment section, tipping can be prevented more effectively according to the shape of the confined space.

[0017] The anti-tipping mechanism can be configured with a spherical wheel at the tip facing the ceiling. It can also be configured with an elastic member that presses the spherical wheel running section against the ceiling surface.

[0018] The ceiling-facing end of the anti-tipping section may be spherical or have a smooth, curved edge, but it is preferable to provide spherical wheels. By using spherical wheels, smoother movement is possible when in contact with the ceiling surface. Furthermore, by pressing the spherical wheels against the ceiling surface, the auxiliary device for the high-pressure water spraying system can be moved more stably along the floor surface.

[0019] Another embodiment of the auxiliary device for high-pressure water jetting equipment of the present invention is characterized in that the mounting portion is embedded within the support portion. By embedding the mounting portion inside the support portion, the height of the auxiliary device for high-pressure water jetting equipment can be reduced, enabling work such as chipping in narrow spaces with narrower spacing. In particular, by positioning and embedding the mounting portion in the center of the support portion, and providing two spherical wheel running sections on the left and right sides of the support portion, and fixing the upper ends of the spherical wheel running sections to the ends of the support portion, it is possible to provide an auxiliary device for high-pressure water jetting equipment with an even lower height.

[0020] A high-pressure water injection device according to a first aspect of the present invention includes a high-pressure water generator that generates high-pressure water, The invention is characterized by comprising a high-pressure water supply passage for supplying the high-pressure water to the injection nozzle operating section, an injection nozzle operating section having an injection nozzle at its tip and performing operations to eject or stop the high-pressure water supplied from the high-pressure water supply passage from the injection nozzle, and any one of the auxiliary tools for a high-pressure water injection device described in paragraphs

[0009] to

[0019] above, to which the injection nozzle is attached and fixed.

[0021] The auxiliary device for the high-pressure water spraying system, equipped with a spherical wheel running section, facilitates the discharge of crushed fragments and rubble, and also facilitates the movement of the spray nozzle within the work area. Furthermore, the preparation work before starting operations is extremely simple compared to conventional rail installation, and the auxiliary device for the high-pressure water spraying system significantly improves work efficiency. [Effects of the Invention]

[0022] According to the auxiliary device for a high-pressure water injection device of the present invention, the injection nozzle operating part is kept detachable. By using an auxiliary tool for a high-pressure water injection device, which includes a mounting part for holding, a support body part for supporting the mounting part, and a spherical wheel traveling part provided on the lower surface of the support body and supported so as to be freely rotatable, it is possible to freely move the injection nozzle along the floor surface in a narrow area by simply fixing the injection nozzle operation part to the mounting part of the auxiliary tool for the high-pressure water injection device. Therefore, before starting work such as hanging work in a narrow area, there is no need for the work of laying rails in the vertical and horizontal directions as in the conventional case, and it is possible to start work such as hanging work with extremely simple preliminary preparation.

[0023] In addition, since the floor surface can be moved in any direction by the spherical wheels, rails and fixtures for movement are not required, and crushed pieces, rubble, etc. are not blocked by a laying frame such as a rail, and are easily discharged. Therefore, not only is the work of discharging crushed pieces, rubble, etc. facilitated, but the movement of the injection nozzle is less likely to be hindered by the accumulation of rubble, etc., and the movement of the injection nozzle is facilitated, enabling smooth work such as hanging work.

Brief Description of the Drawings

[0024] [Figure 1] It is a perspective view showing a state where an auxiliary tool for a high-pressure water injection device according to an embodiment of the present invention is attached to a high-pressure water injection device. [Figure 2] It is a side view exemplifying a state of performing hanging work in a narrow area using an auxiliary tool for a high-pressure water injection device according to an embodiment of the present invention. [Figure 3] (a) is a front view of an auxiliary tool for a high-pressure water injection device according to an embodiment of the present invention, and (b) is a front view for explaining a procedure for attaching a high-pressure water pipe of a high-pressure water injection device to the auxiliary tool for a high-pressure water injection device according to the present invention. [Figure 4] (a) to (d) are partially enlarged views exemplifying a spherical wheel traveling part with different lengths of support legs. [Figure 5] It is a front view showing another embodiment of an auxiliary tool for a high-pressure water injection device according to the present invention. [Figure 6] It is a front view showing an embodiment of a spherical wheel with a part of the support frame of the frame cut out so that the internal structure can be seen. [Figure 7] This diagram schematically shows the overall configuration of a high-pressure water injection system. [Figure 8] This is a perspective view of an auxiliary device for a high-pressure water injection system according to conventional technology. [Modes for carrying out the invention]

[0025] The present invention relates to a high-pressure water jet device that uses high-pressure or ultra-high-pressure water to perform tasks such as chipping away at civil engineering facilities such as bridges and highways, buildings and other facilities using concrete or reinforced concrete, and piping for water and sewage systems and plant equipment, or to clean or remove stubborn deposits such as dirt, paint, and debris from surfaces. The high-pressure water jet device is a device that supplies ultra-high-pressure water or high-pressure water generated by an ultra-high-pressure water generator to a jet nozzle at the work site, and then sprays the ultra-high-pressure water from the jet nozzle onto the surface of the work target to perform chipping, cleaning, paint removal, and other tasks.

[0026] The present invention relates to an auxiliary tool for assisting the movement and operation of the spray nozzle of a high-pressure water spray device during chipping and other similar operations. In particular, it provides an auxiliary tool for a high-pressure water spray device suitable for chipping and other operations in confined spaces, such as narrow spaces between upper and lower walls. The auxiliary tool for a high-pressure water spray device of the present invention is particularly suitable for working in confined spaces with low heights of less than 30 cm. However, 30 cm is merely an example, and the usage environment of the auxiliary tool for a high-pressure water spray device according to the present invention is not limited to confined spaces with a height of around 30 cm; it can also be used in higher or lower confined spaces.

[0027] Figure 1 shows a perspective view of a spray nozzle operating section with an auxiliary device for a high-pressure water spraying system according to one embodiment of the present invention attached. Figure 2 is a schematic side view showing the state during the operation of chipping away at the upper wall (ceiling) surface using the auxiliary device for the high-pressure water spraying system shown in Figure 1 in a confined space. .

[0028] The spray nozzle operating unit 10 is connected to a high-pressure water generator that generates high-pressure water or ultra-high-pressure water, and sprays high-pressure water or ultra-high-pressure water from the spray nozzle 11 at its tip and irradiates the work object. By irradiating with high-pressure water, surface treatment work such as chipping concrete and removing firmly attached dirt and paint is performed. In a typical usage environment, for example, chipping concrete can be performed by irradiating with ultra-high-pressure water of 200 MPa or more, while ultra-high-pressure water or high-pressure water below that level is used for surface treatment and removal of dirt and paint.

[0029] High-pressure water or ultra-high-pressure water is generated by a high-pressure water generator 70 and supplied to a spray nozzle operating unit 10, as illustrated in Figures 1 and 2, via a high-pressure water supply channel 71 (see Figure 7) consisting of a high-pressure hose, tube, or pipe. The spray nozzle operating unit 10 is provided with an operating lever 13, which allows the opening and closing state of an on / off valve (not shown) located in the high-pressure water pipe 12 or the high-pressure water supply channel to be controlled. High-pressure water is supplied to the spray nozzle at the tip via the high-pressure water pipe 12, and the high-pressure water is sprayed toward the work object to perform tasks such as chipping.

[0030] The spray nozzle 11 used for chipping and other operations is not limited to one that ejects high-pressure water from a single nozzle. Depending on the type of work, various types of spray nozzles with different shapes and functions can be used, such as those with multiple nozzles that rotate while spraying high-pressure water, or those with different spray angles. Figure 1 shows a spray nozzle 11 with a simple structure that ejects high-pressure water from a single nozzle. However, the auxiliary device for high-pressure water spraying devices of the present invention can be used with any type of spray nozzle operating unit, and the function, form, and type of spray nozzle used are not particularly limited.

[0031] Figure 1 shows the present invention with an auxiliary device for a high-pressure water injection device according to one embodiment attached. The auxiliary device for the high-pressure water injection device 20 has a mounting portion 31 for attaching the injection nozzle operating unit 10, and the high-pressure water pipe 12 of the injection nozzle operating unit 10 is attached and fixed to the mounting portion 31.

[0032] Figure 1 shows an example of an auxiliary device for a high-pressure water injection system, which is equipped with a total of two spherical wheeled running sections 21 on the left and right sides, and a total of two anti-tipping sections 41 on the left and right sides. However, the spherical wheeled running sections 21 may be one or three or more. Also, while it is preferable to have anti-tipping sections, they are not mandatory, and they may be omitted, or one or three or more may be provided.

[0033] The lower part of the spherical wheel running section 21 is equipped with spherical wheels 27 (see Figures 3 and 6, etc.) that are not restricted in their direction of rotation and can rotate freely. Therefore, when the spray nozzle operating section 10 is moved in the forward, backward, left, or right direction, the spherical wheels 27 of the spherical wheel running section 21 rotate in the direction of movement, allowing it to move freely on the floor surface 82. As a result, the operator can move the spray nozzle 11 to a desired position in the left, right, forward, or backward direction simply by swinging the spray nozzle operating section 10 in the left, right, forward, or backward direction. Furthermore, since the spherical wheels 27 are supported to rotate freely without a rotation axis, by tilting the front side of the spray nozzle operating section up and down, the spray nozzle on the opposite side can be moved up and down in the opposite direction, using the contact point between the spherical wheels 27 of the auxiliary device for high-pressure water spraying equipment 20 and the floor as a pivot point.

[0034] In Figures 1 and 2, the spray nozzle 11 is mounted facing upwards, and an example is shown of chipping away at the upper wall surface (ceiling surface) with high-pressure water. However, by mounting the spray nozzle 11 facing downwards, sideways, or forwards, it is also possible to perform chipping and other work on the floor wall (floor surface), side walls, and back wall (wall on the depth side). When chipping away at the floor surface, the legs 22 It is preferable to use a short auxiliary device for high-pressure water treatment equipment (see Figures 3 and 4) and provide a tipping prevention section 41.

[0035] Figures 3(a) and 3(b) are front views showing one embodiment of the auxiliary device 20 for a high-pressure water injection device. The mounting portion 31 shown near the center of the figure comprises a support portion 32 and a clamping portion 33. The clamping space 34 formed by the support portion 32 and the clamping portion 33 clamps the high-pressure water pipe 12 of the injection nozzle operating portion 10, thereby gripping and fixing the injection nozzle operating portion 10.

[0036] As shown in Figure 3(b), the clamping portion 33 is separable or detachable, and after clamping the high-pressure water pipe 12, it can be secured by a screw 54, for example, as shown in Figure 5. The fixing member of the clamping portion 33 is not limited to a screw 54, but can also be fixed to the support portion 32 with a hinge at one end and a locking fixing portion at the other end to clamp the high-pressure water pipe 12, or various other well-known gripping structures can be adopted. Furthermore, in addition to simply clamping, the mounting portion that clamps the high-pressure water pipe may be configured to swing left and right or front and back.

[0037] Next, with reference to Figure 4, various configuration examples of the spherical wheel running section 21 will be described. Figure 4(a) shows a configuration example of a part of the auxiliary device 20 for the high-pressure water spraying device shown in Figure 3 (the spherical wheel running section 21 and the anti-tipping section 41 on the right side). Figures 4(b) to (d) show examples in which the lengths of the legs 22b to 22d of the spherical wheel running sections 21b to 21d are different from the length of the leg 22a in Figure 4(a). By changing the length of the leg 22, auxiliary devices 20 for the high-pressure water spraying device of different heights can be made. This makes it possible to select and use an auxiliary device for the high-pressure water spraying device of a height suitable for the work, according to the gap (spacing) in the narrow section 80.

[0038] The auxiliary device for the high-pressure water jetting system preferably has a configuration in which multiple spherical wheeled running sections 21 of different lengths that can be attached to and detached from the support section 30 are provided, and legs 22 of the desired length are attached to the support section 30 according to the working environment. Furthermore, it is preferable to have an adjustment section that allows the height of the auxiliary device for the high-pressure water jetting system to be adjusted by adjusting the length of the legs of the spherical wheeled running sections 21.

[0039] Figures 3 and 4 show an example of a configuration in which the legs are replaceable and height adjustable. Male screws 23a to 23d are provided on the circumference of the leg 22, and female screws (not shown) are provided on the inner circumference of the through hole at the end 30a of the support part 30. The leg 22 is then screwed into the through hole to attach the spherical wheel running part 21 to the support part 30.

[0040] This configuration allows for adjustment of the length of the legs 22a to 22d from the support 30 to the floor 82, i.e., the height of the auxiliary device 20 for the high-pressure water jetting device, by changing the amount of penetration of the legs into the support. By adjusting the height of the support 30, the height of the mounting part 31 can be adjusted to a height suitable for chipping work, depending on the size of the gap in the confined space.

[0041] Furthermore, the male threads on the leg portion 22 may be provided on the circumference over almost the entire length direction for height adjustment, or they may be configured to be provided only in a predetermined range (for example, the upper 1 / 3 to 1 / 4 range). The configuration for making the spherical wheel portion replaceable or height adjustable is not limited to the examples shown in Figures 3 and 4, and other known technologies can be employed.

[0042] Furthermore, since chipping and cleaning operations using high-pressure water are carried out in a harsh environment with high-pressure water jets, vibrations, and flying debris, it is preferable that the spherical wheel running sections 21a to 21d be firmly fixed to the support section 30. For this reason, it is preferable that the spherical wheel running section 21 be firmly fixed to the support section 30 using, for example, nuts 24a and / or 24b, as illustrated in Figures 3 and 4 (it may also be fixed with just one nut).

[0043] Next, the spherical wheel 27, which is provided on the lower side of the leg portion 22 of the spherical wheel running section 21, will be described. The spherical wheel 27 is supported by the spherical wheel section 25 so as to be able to rotate freely. Figures 6(a) and (b) are front views showing an embodiment of the spherical wheel section 25 that can be used in the present invention. To illustrate that the spherical wheel 27 is rotatably supported, a portion of the wheel support frame 61 is cut out to show part of its internal structure.

[0044] The spherical wheel 27 is held in place by a spherical holding part 62, which is located at the bottom of the wheel support frame 61 and has an opening smaller in diameter than the spherical wheel 27, to prevent it from falling. Multiple bearings 63 are inserted between the spherical wheel 27 and the wheel support frame 61. The spherical wheel part 25 is fixed to the leg part 22 via a mounting shaft 65. Therefore, when the spherical wheel running part 21 is placed on the floor, the weight of the auxiliary device for the high-pressure water spraying device is applied to the spherical wheel 27, and the spherical wheel 27 comes into contact with the wheel support frame 61 via the bearings 63. Since the spherical wheel 27 (27a, 27b) is in contact with the wheel support frame 61 via the bearings, it can rotate in any direction with little resistance and can roll freely on the floor surface of the work site in the direction the operator moves it. The material of the spherical wheel 27 is not particularly limited, but it is preferable that it be made of a hard material such as metal.

[0045] Figure 6(b) shows an embodiment in which the spherical wheel 27 is equipped with a brush-shaped guide 66 on the periphery of the spherical wheel 27 at the lower part of the support frame. This prevents fine fragments and other debris from getting into the space between the spherical wheel 27 and the wheel support frame 61, thereby preventing the spherical wheel 27 from rotating poorly or being damaged.

[0046] Next, the anti-tipping section 41 will be described using Figures 1 to 4. The anti-tipping section 41 is provided between the support section 30 and the upper wall surface (ceiling surface: see Figure 2) 81 of the narrow section, and has the function of preventing the auxiliary device 20 for the high-pressure water spraying device from tipping over when it is moved. Figures 1 to 4 show an example in which a total of two anti-tipping sections 41 are provided on the left and right sides of the upper surface of the support section 30. It is desirable to provide two or more anti-tipping sections, but it is not limited to this, and there may be one or three or more anti-tipping sections.

[0047] The examples of anti-tipping parts shown in Figures 1 to 4 show an example in which a spherical wheel 42 is provided at the upper end of the anti-tipping part 41. However, it is not essential that the upper end be a spherical wheel 42; it may also be a fixed surface with a smooth curved shape that contacts the upper wall surface (contact end surface), such as a fixed sphere, hemisphere, or part of a sphere that does not rotate. Alternatively, it may be a contact end surface with a gently changing curved shape at the edge and a flat surface at the upper end, or an anti-tipping part with a flat contact end surface 58 as shown in Figure 5. If the contact end surface of the anti-tipping part does not rotate, it is preferable that the contact end surface with the upper wall surface be a smooth, low-friction surface. Furthermore, the upper end does not need to be in constant contact with the upper wall surface; it is sufficient if it contacts the upper wall surface or side wall surface when tilted to prevent tipping.

[0048] In the examples shown in Figures 3 and 4, an elastic member 43 is provided to press the tip contact portion of the anti-tipping unit (spherical wheel 42 in the embodiment) against the upper wall surface (ceiling surface) 81. By providing this configuration in which the anti-tipping unit is pressed against the upper wall surface, more stable operation becomes possible. However, providing the elastic member 43 is not essential. For example, without providing the elastic member 43, the anti-tipping unit 41 may be made to be a height such that there is a small gap between the tip and the ceiling surface 81 when the tip is attached to the support portion 30. Even if there is a gap between the anti-tipping unit 41 and the ceiling surface 81, by providing anti-tipping units 41 on both the left and right sides, when the auxiliary device for the high-pressure water spraying device tilts laterally, the tip contact portion of one of the anti-tipping units 41 will hit the ceiling surface 81 and prevent tipping. Furthermore, tipping forward or backward is prevented by the high-pressure water pipe of the spray nozzle operating unit, so the risk of tipping forward or backward is low.

[0049] When an elastic member is provided to press the tip contact portion of the anti-tipping section 41 or 57 against the upper wall surface, the elastic member is not limited to a coil spring as shown in Figure 3 or Figure 4, but may also be other elastic members such as a leaf spring (not shown). Furthermore, the pressing force of the elastic member should preferably be such that it does not hinder movement. Also, even when the anti-tipping section 41 or 57 is biased upward by the elastic member, the tip contact portion at the upper end does not need to be in constant contact with the ceiling surface, and the configuration may be such that it functions as a buffer when the tip contact portion comes into contact with the ceiling surface.

[0050] Figure 5 is a front view showing another embodiment of the auxiliary device for a high-pressure water spraying device of the present invention. The auxiliary device for a high-pressure water spraying device shown in Figure 5 is an auxiliary device 50 for a high-pressure water spraying device that is suitable for work in narrow spaces where the distance between the ceiling surface (upper wall surface) 81 and the floor surface 82 is very narrow. For this reason, the height (length of the legs) of the auxiliary device 50 for the high-pressure water spraying device has been shortened. The mounting part 52 is embedded in the support part 51, and the height of the spherical wheel running part 55 and the tipping prevention part 57 have been shortened as much as possible.

[0051] Specifically, the part corresponding to the support portion 32 of the mounting portion 31 in Figure 3 is designated as the support portion 51, and the mounting portion 52 is embedded in the support portion 51, with the clamping portion 53 being fixed with a screw 54 after the high-pressure water pipe is clamped. In addition, the spherical wheel portion 25 is fixed to the end portion 51a of the support portion without having legs.

[0052] In Figure 5, the contact end surface 58 of the anti-tipping part 57 is a nut-shaped flat surface with a low height, but depending on the size of the narrow space, it is also possible to use a non-rotating partially spherical shape or a spherical wheel. Furthermore, if the narrow space is narrow, it is possible to omit the anti-tipping part 57. Even without the anti-tipping part, when tilted laterally, the end of the support part will come into contact with the ceiling surface, preventing it from tipping over laterally.

[0053] Figure 7 schematically shows the configuration of a high-pressure water injection device using the auxiliary device for high-pressure water injection devices according to the present invention. High-pressure water or ultra-high-pressure water generated by the high-pressure water generator 70 is controlled by a control unit 72 including a safety valve and a branch valve, and supplied to the injection nozzle operating unit 10 via a high-pressure water supply channel 71. The operator controls the irradiation position and irradiation time of the high-pressure water by operating the injection nozzle operating unit to perform work such as chipping.

[0054] The spray nozzle operating unit 10 is fitted with an auxiliary device 20 for a high-pressure water spray device according to the present invention, which allows it to be freely moved along the floor surface. As the auxiliary device for a high-pressure water spray device shown in Figure 7, various auxiliary devices for a high-pressure water spray device according to the present invention described with reference to Figures 1 to 6 can be used.

[0055] In the above description, several embodiments and configurations of auxiliary devices for high-pressure water injection devices have been illustrated. However, the invention is not limited to the combinations of the spherical wheel running section, support section, and anti-tipping section described in the specification. Combining these parts freely constitutes an embodiment of the invention. Furthermore, combining these combinations with known and widely accepted technologies also constitutes an embodiment of the invention. For example, various known spherical wheels can be applied to the spherical wheel configuration. [Explanation of Symbols]

[0056] 10 Spray nozzle operating section 11 Spray nozzle 12 High-pressure water pipe 20. Auxiliary tools for high-pressure water injection systems 21 (21a~21d), 55 Spherical Wheel Running Section 22(22a~22d) Legs 25 Spherical Wheel Section 27, 42 Spherical Wheel 30, 51 Support part 31 Mounting part 32 Support part 33 Clamping part 41 Anti-tip section

Claims

1. An auxiliary tool for a high-pressure water spraying device that supports and moves a spray nozzle operating unit for performing chipping, cleaning, and other operations by spraying high-pressure water at a desired position on the wall or floor in a narrow space between spaced walls and floors, A mounting portion that detachably holds the injection nozzle operating portion, A support portion that supports the aforementioned mounting portion, A spherical wheel running section is provided on the lower surface of the support portion and includes a spherical wheel that is supported so as to be freely rotatable. An auxiliary device for a high-pressure water injection system, characterized by being equipped with the following features.

2. The auxiliary device for a high-pressure water jet device according to claim 1, characterized in that it comprises two or more of the aforementioned spherical wheel running sections.

3. The auxiliary device for a high-pressure water jet device according to claim 2, characterized in that the spherical wheel running section is provided with support legs extending from the support section toward the floor, and the spherical wheel is supported so as to be freely rotatable at the floor-side tip of the support legs.

4. The auxiliary device for a high-pressure water jet device according to claim 3, characterized in that the support legs are detachably fixed to the support body.

5. The auxiliary device for a high-pressure water spraying device according to claim 3, characterized in that the support leg portion is provided with a height adjustment portion.

6. The auxiliary device for a high-pressure water spraying device according to claim 3, further comprising one or more anti-tipping parts fixed to the side of the support portion opposite to the support legs and extending toward the ceiling surface.

7. The auxiliary device for a high-pressure water spraying device according to claim 6, characterized in that the anti-tipping part is detachably or replaceably fixed to the support part.

8. The auxiliary device for a high-pressure water spraying device according to claim 6, characterized in that the anti-tipping part is provided with a height adjustment part.

9. The auxiliary device for a high-pressure water spraying device according to claim 6, characterized in that the anti-tipping part is provided with a spherical wheel at the tip on the ceiling side.

10. The auxiliary device for a high-pressure water jet device according to claim 2, characterized in that the mounting portion is embedded in the support portion.

11. A high-pressure water generator that produces high-pressure water, A high-pressure water supply path for supplying the high-pressure water to the injection nozzle operating section, The nozzle operating unit is equipped with a spray nozzle at its tip and performs operations to spray or stop the high-pressure water supplied from the high-pressure water supply passage from the spray nozzle, An auxiliary device for a high-pressure water injection device according to any one of claims 1 to 10, to which the injection nozzle is attached and fixed. A high-pressure water injection device equipped with the following features.

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