Water jet apparatus

Abstract

To provide a water jet device which can be used for a floor surface by a wall SOLUTION: The water jet device 1 includes a nozzle of a water jet, a cover 20 covering the periphery of a discharge port of the nozzle and having an opening, a frame 3 protruding the cover 20 outward from one end in the lateral direction and fixing the cover 20 with the opening facing downward, and a plurality of wheels 6 attached to the frame 3.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This specification discloses a water jet device. [Background technology]

[0002] Japanese Patent Application Laid-Open No. 2001-179143 discloses a water jet device that includes a housing that covers a water jet nozzle, a frame that supports the housing, and wheels attached to the frame. This water jet device can spray high-pressure fluid while moving. This water jet device can spray high-pressure fluid to remove foreign matter adhering to the surface of an object or to roughen the surface of the object. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2001-179143 A Summary of the Invention [Problem to be solved by the invention]

[0004] The water jet device disclosed in JP 2001-179143 A has frames located on the left and right sides of a housing that covers the water jet nozzle, with wheels located in front and behind the left and right frames. The housing is located inside the frames and wheels. This water jet device does not allow the housing to be brought close to a wall. This water jet device does not allow the water jet nozzle to be brought close to a floor surface next to a wall. This water jet device cannot be used on a floor surface next to a wall.

[0005] It is the applicant's intention to provide a water jet device that can be used on floor surfaces adjacent to walls. [Means for solving the problem]

[0006] The present specification discloses a water jet device, Water jet nozzle, a cover that covers the periphery of the nozzle outlet and has an opening; a frame to which the cover is fixed with the cover protruding outward from one end in the left-right direction and the opening facing downward; and, a plurality of wheels attached to the frame; Equipped with. [Effects of the Invention]

[0007] This water jet device can be used on floors near walls. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a water jet device according to one embodiment. [Figure 2] 2A is a side view of the water jet device of FIG. 1, and FIG. 2B is a plan view of the water jet device of FIG. [Figure 3] 3A is a plan view showing a switch fixture of the water jet device of FIG. 1, and FIG. 3B is a side view showing the switch fixture. [Figure 4] 4 is a partial cross-sectional view of a water jet attachment provided in the water jet device of FIG. [Figure 5] FIG. 5 is a rear view showing the water jet device of FIG. 1 in use. [Figure 6] FIG. 6 is a plan view of the water jet device in use as shown in FIG. [Figure 7] 7A is a rear view showing another use state of the water jet device of FIG. 1, and FIG. 7B is a side view of the water jet device in the other use state of FIG. 7A. [Figure 8] 8A is a cross-sectional side view showing still another state of use of the water jet device of FIG. 1, and FIG. 8B is a cross-sectional side view showing still another state of use of the water jet device of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, preferred embodiments will be described in detail with reference to the drawings as appropriate.

[0010] The water jet device 1 shown in FIG. 1 is a device for spraying high-pressure water to perform cleaning, stripping, chipping, etc. The pressure of the high-pressure water is not particularly limited, but is, for example, 100 MPa or more and 250 MPa or less. Arrow X in FIG. 1 indicates the forward direction in the front-to-rear direction of the water jet device 1, arrow Y indicates the leftward direction in the left-to-right direction, and arrow Z indicates the upward direction in the up-to-down direction. FIG. 2A is a left side view of the water jet device 1, and FIG. 2B is a plan view. As shown in FIG. 2A, the water jet device 1 is placed on a floor surface 2. For example, the water jet device 1 is used to chip the floor surface 2.

[0011] As shown in FIGS. 1 and 2, the water jet device 1 comprises a frame 3 and a water jet attachment 4 attached to the frame 3.

[0012] As shown in Fig. 2A, the water jet device 1 includes a front wheel 5 attached to a frame 3. As shown in Fig. 1, the water jet device 1 includes a rear wheel 6 and training wheels 7. Furthermore, the water jet device 1 includes a stem 8 and a handle 9 for operating the front wheel 5.

[0013] The water jet device 1 can be moved by an operator pushing and pulling the frame 3. The water jet device 1 can scrape the floor surface 2 while moving. The water jet device 1 may also be provided with a drive device and moved by the drive device.

[0014] The frame 3 has a main frame 10 and a support frame 11 to which the attachment 4 is attached. The materials of the main frame 10 and the support frame 11 are not particularly limited, but may be, for example, square steel pipes. The support frame 11 is attached to the main frame 10 and is located in front of the main frame 10. The support frame 11 is rotatable relative to the main frame 10. Furthermore, the frame 3 has a fixing frame 12 that fixes the rotatable support frame 11 to a predetermined position on the main frame 10.

[0015] The frame 3 has a front grip 13 located in front of the main frame 10 and a rear grip 14 located behind the main frame 10. The front grip 13 is located in a position in front of the water jet device 1 where it can be grasped by an operator. The rear grip 14 is located in a position in the rear of the water jet device 1 where it can be grasped by an operator.

[0016] 2B, the water jet device 1 includes a front switch 15 located on the front grip 13 and a rear switch 16 located on the rear grip 14. The front switch 15 and the rear switch 16 are switches that switch the discharge of high-pressure water on and off.

[0017] Although not shown, the water jet device 1 has a pneumatic circuit. The pneumatic circuit has a first valve that opens and closes the pneumatic circuit by turning on and off the front switch 15, and a second valve that opens and closes the pneumatic circuit by turning on and off the rear switch 16. The pneumatic circuit has a supply pipe that supplies high-pressure water to the attachment 4, and a switching valve that switches the flow path of the supply pipe by opening and closing the first and second valves. For example, by opening both the first and second valves, the switching valve supplies high-pressure water from the supply pipe to the attachment 4, and by closing both or either the first and second valves, the switching valve supplies high-pressure water from the supply pipe to another flow path without supplying it to the attachment 4.

[0018] As shown in Fig. 2B, the water jet device 1 has a front switch fixture 17 located around the front switch 15 and a rear switch fixture 18 located around the rear switch 16. The front switch fixture 17 has a presser 17A and a stopper 17B. The rear switch fixture 18 has a presser 18A and a stopper 18B. In Fig. 2, the front switch 15 and the rear switch 16 are not pressed in and are in the OFF state.

[0019] 3A and 3B show a usage state of the front switch 15 and the front switch fixture 17 that is different from the usage state of FIG. 2A. In FIG. 3A, the front switch 15 is pressed into the front grip 13. The front switch 15 is in the ON state. The presser foot 17A is in a rotated position relative to the usage state of FIG. 2A. The presser foot 17A abuts against the front switch 15. The stopper 17B is in a rotated position relative to the usage state of FIG. 2A. The stopper 17B stops the rotation of the presser foot 17A. In FIGS. 3A and 3B, the front switch 15 is held in the ON state by the front switch fixture 17.

[0020] Figure 4 shows the attachment 4 attached to the support frame 11. Figure 4 also shows a cross section of part of the interior of the attachment 4. The attachment 4 comprises a main body 19 and a cover 20 located below the main body 19. Although not shown, a high-pressure water supply hose and a drain hose are connected to the main body 19.

[0021] The cover 20 has a cover body 20A and a brush 20B. The brush 20B extends downward from the lower end of the cover body 20A. The cover body 20A and the brush 20B form a circular ring-shaped peripheral wall 20C, and the brush 20B forms an edge 20D of the cover 20. The brush 20B forms an opening 20E, which is a circular planar opening. Note that the edge 20D is not limited to the brush 20B. For example, the cover 20 may not have the brush 20B, and the edge 20D may be the lower end of the cover body 20A, or the cover body 20A may form the opening 20E.

[0022] The attachment 4 includes six water jet nozzles 21 and a nozzle holder 22 to which the nozzles 21 are attached. The nozzles 21 and the nozzle holder 22 are located inside the cover 20. The nozzles 21 and the nozzle holder 22 are covered by the cover 20. The outlets 21A of the nozzles 21 are also covered by the cover 20. Each nozzle 21 is connected to a supply hose. The outlets 21A of each nozzle 21 face downward. The number of nozzles 21 is not limited to six. The number of nozzles 21 may be one, or two or more.

[0023] Nozzle holder 22 is attached to main body 19. Nozzle holder 22 is rotatable around axis 22A. Nozzle 21 is rotatable together with nozzle holder 22. Note that nozzle holder 22 does not have to be rotatable. Nozzle holder 22 may be fixed to main body 19.

[0024] 5 and 6 show the water jet apparatus 1 in a different state of use from that shown in FIG. 1. FIG. 5 is a rear view of the water jet apparatus 1, and FIG. 6 is a plan view of the water jet apparatus 1. In FIGS. 5 and 6, the water jet apparatus 1 is positioned at the edge of the wall 23. In this state, the cover 20 may be in contact with the wall surface 23A of the wall 23.

[0025] 5 and 6, the training wheels 7 are located to the right of the left end of the main frame 10 in the left-right direction. The training wheels 7 are in a retracted position where they do not protrude from the frame 3 in the left-right direction. In FIG. 5, the training wheels 7 in the use state in FIG. 1 are shown by two-dot chain lines. In the use state in FIG. 1, the training wheels 7 abut against the floor surface 2. The training wheels 7 are in a running position where they protrude from the frame 3 in the left-right direction. The training wheels 7 can change their position relative to the main frame 10 between a retracted position and a running position. In this water jet device 1, the training wheels 7 are rotatable relative to the main frame 10.

[0026] Figures 7A and 7B show the water jet device 1 in yet another state of use that is different from the state of use in Figure 1. Figure 7A is a side view of the water jet device 1, and Figure 7B is a rear view of the water jet device 1.

[0027] In the use state of Figures 7A and 7B, the training wheels 7 are in a retracted position, similar to the use state of Figure 5. The stem 8 is rotated 90 degrees from the use state of Figure 1. The front wheel 5 runs in the left-right direction. The handlebars 9 are rotated in a direction that intersects with the plane that includes the rotation direction of the stem 8 and are upright.

[0028] Figure 8A shows the water jet device 1 in yet another state of use. Figure 8A is a side cross-sectional view of the water jet device 1 as viewed from the right. In the state of use in Figure 8A, the support frame 11 has rotated relative to the main frame 10 compared to the state of use in Figure 1. The cover 20 is positioned higher than in the state of use in Figure 1. The attachment 4 is in a moving position away from the floor surface 2. The front end of this attachment 4 is positioned higher than the rear end of the cover 20.

[0029] As shown in Fig. 8A, one end of the fixed frame 12 is rotatably attached to the support frame 11. The other end of the fixed frame 12 has a first hole 12A and a second hole 12B. In Fig. 8A, the second hole 12B is positioned on the first pin 10A of the main frame 10. The fixed frame 12 fixes the support frame 11. As a result, the support frame 11 fixes the attachment 4 in a moving position.

[0030] 2A, the first hole 12A is positioned on the first pin 10A of the main frame 10. In FIG. 2A, the fixed frame 12 also fixes the support frame 11. In FIG. 2A, the attachment 4 is in a jetting position in contact with the floor surface 2. In FIG. 2A, the support frame 11 fixes the attachment 4 in the jetting position.

[0031] Figure 8B shows the water jet device 1 in yet another state of use. Figure 8B is a side cross-sectional view of the water jet device 1 as viewed from the right. In the state of use in Figure 8B, the support frame 11 has rotated further relative to the main frame 10 compared to the state of use in Figure 8A. The front end of the cover 20 is positioned further upward compared to the state of use in Figure 8A. The attachment 4 is in a retracted position away from the floor 2. The front end of this attachment 4 is positioned higher than the rear end of the cover 20. The opening 20E of the cover 20 of this attachment 4 faces forward.

[0032] As shown in Fig. 8B, the main frame 10 has a second pin 10B located rearward of the first pin 10A. In Fig. 8B, the first hole 12A is positioned at the second pin 10B of the main frame 10. The fixed frame 12 fixes the support frame 11. As a result, the support frame 11 fixes the attachment 4 in the retracted position.

[0033] The fixed frame 12 only needs to be able to position the support frame 11 relative to the main frame 10, and the positioning of the fixed frame 12 and the main frame 10 is not limited to the first hole 12A, the second hole 12B, the first pin 10A, and the second pin 10B. For example, the fixed frame 12 may have positioning pins instead of the first hole 12A and the second hole 12B, and the main frame 10 may have positioning holes instead of the first pin 10A and the second pin 10B.

[0034] Here, chipping work using this water jet device 1 will be described. Although not shown, a high-pressure water supply hose and a drain hose are connected to the main body 19. Compressed air is supplied to the air pressure circuit of the water jet device 1. As shown in FIG. 3A, the front switch 15 is in the ON state. The front switch 15 is held in the ON state by the front switch fixture 17. As shown in FIG. 6, the training wheels 7 are in a retracted position where they do not protrude from the frame 3 in the left-right direction.

[0035] The worker grips the rear switch 16 together with the rear grip 14. The high-pressure water selector valve is switched, and high-pressure water is supplied to the attachment 4. The high-pressure water is sprayed from the outlet 21A of the nozzle 21, and the nozzle holder 22 rotates. The nozzle 21 sprays the high-pressure water while rotating together with the nozzle holder 22. The floor surface 2 is scraped by this high-pressure water.

[0036] The worker holds the rear grip 14 and pushes the water jet device 1 from behind. The water jet device 1 moves. The worker operates the handle 9 to adjust the moving direction of the water jet device 1. The water jet device 1 moves along the floor surface 2 while scraping it. The water jet device 1 runs along the edge of the wall 23, along the wall surface 23A.

[0037] Next, the work at the front of the water jet device 1 will be described. The worker stops the water jet device 1. The worker releases the rear switch 16. The rear switch 16 turns off. The water jet device 1 stops spraying high-pressure water. The chipping work on the floor surface 2 is temporarily stopped.

[0038] The worker rotates stopper 17B of front switch fixture 17 and removes stopper 17B from presser foot 17A. The worker rotates presser foot 17A. With presser foot 17A removed, front switch 15 is turned off. The front switch 15 is released from the on state held by front switch fixture 17. The worker turns rear switch 16 on and rotates presser foot 18A to abut against rear switch 16. Stopper 18B is rotated, stopping the rotation of presser foot 18A. This turns rear switch 16 on.

[0039] The worker grips the front grip 13 and the front switch 15. The front switch 15 is turned on. High-pressure water is supplied to the attachment 4. The nozzle 21 sprays high-pressure water while rotating together with the nozzle holder 22. The floor surface 2 is scraped by this high-pressure water.

[0040] The worker holds the front grip 13 and moves the water jet device 1. The worker operates the handle 9 to adjust the traveling direction of the water jet device 1. For example, the worker operates the handle 9 to change the moving direction of the front wheel 5 to the left or right. The worker rotates the handle 9 relative to the stem 8. In this way, the water jet device 1 is brought into the use state shown in Figures 7A and 7B. The water jet device 1 moves while scraping the floor surface 2.

[0041] During this chipping operation, the wastewater containing the chipped pieces is sucked and discharged from the outlet of the attachment 4. The wastewater containing the chipped pieces is sent to a treatment device, where the chipped pieces and the wastewater are separated. The separated chipped pieces and the wastewater are each subjected to the necessary treatment.

[0042] The attachment 4 includes a cover 20 that covers the discharge port 21A of the nozzle 21. The attachment 4 prevents chipping chips and wastewater from scattering. The water jet device 1 can reduce the amount of equipment required by the worker, even when chipping a floor 2 that contains harmful substances such as asbestos. By reducing the amount of equipment required, the water jet device 1 can reduce the workload of the worker.

[0043] In this water jet device 1, the cover 20 protrudes from one end of the frame 3 in the left-right direction. The frame 3 fixes the cover 20 with the opening 20E protruding and facing downward. The water jet device 1 can also be used to chip the floor surface 2 along the edge of a wall 23.

[0044] From the viewpoint of using the water jet device 1 on the floor surface 2 adjacent to the wall 23, as shown in Fig. 5, it is preferable that the front wheels 5 and rear wheels 6 of the water jet device 1 be positioned further inward from the wall 23 than the cover 20 in the left-right direction. Furthermore, it is preferable that the front wheels 5 and rear wheels 6 be positioned further inward from the wall 23 than the frame 3 in the left-right direction.

[0045] 6, the cover 20 is positioned so that it protrudes outward from the front end of the frame 3 in the front-to-rear direction. The cover 20 is positioned so that it protrudes from the opening 20E of the frame 3. This water jet device 1 can also be used on a floor surface 2 adjacent to a wall 23 in the front-to-rear direction. Therefore, it is preferable that this water jet device 1 include a frame 3 to which the cover 20 is fixed so that the opening 20E protrudes outward from the front end in the front-to-rear direction.

[0046] As shown in FIG. 1 , the water jet device 1 is equipped with training wheels 7 that are in a running position protruding outward from the left end of the frame 3. By setting the training wheels 7 in a running position protruding outward from the frame 3, the water jet device 1 is able to run more stably. From this perspective, it is preferable that the water jet device 1 be equipped with training wheels 7 that can change their position between a running position in which they protrude outward from the frame 3 at one end in the left-right direction and a retracted position in which they do not protrude outward from the frame 3 at the other end. Note that the position change of the training wheels 7 is not limited to rotation, as long as they are capable of changing their position between the running position and the retracted position. The training wheels 7 may also be detachable from the frame 3.

[0047] Furthermore, the water jet device 1 is provided with a rear wheel 6 that protrudes outward from the right end of the frame 3. By having the rear wheel 6 protrude from the frame 3 in the opposite direction to the training wheels 7 in the left-right direction, the water jet device 1 is able to travel more stably. From this perspective, it is preferable to have the rear wheel 6 protrude from the frame 3 in the opposite direction to the training wheels 7 in the left-right direction.

[0048] This water jet device 1 includes a stem 8 that rotates about an axis to change the traveling direction of the front wheel 5, and a handle 9 that rotates the stem 8 about the axis of the stem 8. This allows an operator to change the traveling direction of the water jet device 1 by operating the handle 9. This handle 9 extends from the front, where the front wheel 5 is located, to the rear. This allows an operator positioned behind the water jet device 1 to operate the handle 9 to change the traveling direction. From this perspective, it is preferable that the handle 9 have a length that extends from the front, where the front wheel 5 is located, to the rear.

[0049] In this water jet device 1, the handle 9 is rotatable relative to the stem 8 in a direction that intersects with a plane that includes the rotation direction of the stem 8. Rotating the handle 9 prevents the handle 9 from protruding left or right. The operator can easily operate the handle 9 even in front of the water jet device 1. With this water jet device 1, the operator can perform chipping work on the floor surface 2 while checking the floor surface 2 near the attachment 4. Therefore, it is preferable that the handle 9 be rotatable relative to the stem 8 in a direction that intersects with a plane that includes the rotation direction of the stem 8.

[0050] An operator can operate the water jet device 1 by operating the front switch 15 at the front of the water jet device 1. An operator can operate the water jet device 1 by operating the rear switch 16 at the rear of the water jet device 1. Furthermore, the water jet device 1 is provided with a front switch fixture 17 that can hold the front switch 15 in the ON state, and a rear switch fixture 18 that can hold the rear switch 16 in the ON state. This allows the operator to easily operate the water jet device 1 from both the front and rear of the water jet device 1. Therefore, it is preferable that the water jet device 1 be provided with the front switch 15, the rear switch 16, the front switch fixture 17, and the rear switch fixture 18.

[0051] The frame 3 has a main frame 10 and a support frame 11 to which the cover 20 is fixed. The support frame 11 rotates relative to the main frame 10, allowing the attachment 4 to change its position between a jetting position in which the opening 20E of the cover 20 faces downward and a moving position in which the cover 20 is positioned above the jetting position. This allows the water jet device 1 to change its position between a jetting position in which the attachment 4 abuts against the floor surface 2 and a moving position in which the attachment 4 is separated from the floor surface 2, facilitating movement of the water jet device 1. Therefore, it is preferable that the frame 3 have the main frame 10 and a support frame 11 that is attached to the main frame 10 and allows the attachment 4 to change its position between the jetting position and the moving position.

[0052] In this frame 3, the support frame 11 rotates further relative to the main frame 10 than in the moving posture, so that the attachment 4 is placed in the retracted posture shown in Fig. 8B. This allows the worker to easily attach, detach, and adjust the attachment 4. Therefore, it is preferable that the frame 3 has a support frame 11 that can change the posture of the attachment 4 to the retracted posture.

[0053] In this water jet device 1, the fixed frame 12 positions the support frame 11 while keeping the attachment 4 in a jetting position. The fixed frame 12 supports the attachment 4, which jets high-pressure water, facing downward. The fixed frame 12 lifts the attachment 4 due to the reaction force caused by the jet of high-pressure water. Therefore, it is preferable that the frame 3 include the fixed frame 12.

[0054] [Disclosure items] Each of the following sections discloses a preferred embodiment.

[0055] [Item 1] Water jet nozzle, a cover that covers the periphery of the nozzle outlet and has an opening; a frame to which the cover is fixed with the cover protruding outward from one end in the left-right direction and the opening facing downward; and, a plurality of wheels attached to the frame; A water jet device comprising:

[0056] [Item 2] Item 2. The water jet apparatus according to item 1, wherein the cover is fixed to the frame with the cover protruding outward from a front end in the front-rear direction.

[0057] [Item 3] 3. The water jet device according to item 1 or 2, further comprising training wheels that can change their posture between a traveling posture in which the training wheels protrude outward from the one end of the frame in the left-right direction and a retracted posture in which the training wheels do not protrude outward from the one end of the frame.

[0058] [Item 4] the plurality of wheels includes a front wheel; a stem that rotates around an axis to change the running direction of the front wheel; and, 4. The water jet device according to any one of items 1 to 3, further comprising a handle that is rotatable relative to the stem in a direction intersecting a plane that includes a rotation direction of the stem and that rotates the stem around an axis of the stem.

[0059] [Item 5] a front switch and a rear switch for switching on and off the discharge of the nozzle; the front switch is located in front of the center of the frame in the front-rear direction, and the rear switch is located behind the center of the frame in the front-rear direction, 5. The water jet apparatus according to any one of items 1 to 4, comprising a front switch fixture capable of holding the front switch in an on state, and a rear switch fixture capable of holding the rear switch in an on state.

[0060] [Item 6] 6. The water jet apparatus according to any one of items 1 to 5, wherein the frame comprises a main frame and a support frame attached to the main frame so as to be able to change its position between a jetting position in which the cover is fixed and the opening of the cover faces downward, and a movable position in which the cover is positioned above the jetting position.

[0061] [Item 7] 7. The water jet apparatus according to claim 6, wherein the frame has a fixed frame that positions the support frame in the jetting attitude. [Explanation of symbols]

[0062] 1. Water jet device 3. Frame 4. Attachment 5. Front wheel 6 Rear wheel 7. Training wheels 8···Stem 9 Handle 10. Mainframe 11. Support frame 12. Fixed frame 15 Front switch 16···rear switch 17 Front switch fixing device 18 Rear switch fixing device 20···Cover 21 Nozzle

Claims

1. Water jet nozzle, a cover that covers the periphery of the nozzle outlet and has an opening; a frame to which the cover is fixed with the cover protruding outward from one end in the left-right direction and the opening facing downward; and, a plurality of wheels attached to the frame; A water jet device comprising:

2. The water jet apparatus according to claim 1 , wherein the cover is fixed to the frame with the cover protruding outward from a front end of the frame in the front-rear direction.

3. 3. The water jet device according to claim 1, further comprising training wheels that can change their position between a traveling position in which they protrude outward from the one end of the frame in the left-right direction and a retracted position in which they do not protrude outward from the one end of the frame.

4. the plurality of wheels includes a front wheel; a stem that rotates around an axis to change the running direction of the front wheel; and, 3. The water jet device according to claim 1, further comprising a handle that is rotatable relative to the stem in a direction intersecting a plane that includes a rotation direction of the stem, and that rotates the stem around an axis of the stem.

5. a front switch and a rear switch for switching on and off the discharge of the nozzle; the front switch is located in front of the center of the frame in the front-rear direction, and the rear switch is located behind the center of the frame in the front-rear direction, 3. The water jet apparatus according to claim 1, further comprising: a front switch fixture capable of holding the front switch in an on state; and a rear switch fixture capable of holding the rear switch in an on state.

6. 3. The water jet device according to claim 1, wherein the frame comprises a main frame and a support frame attached to the main frame so as to be capable of changing its position between a jetting position in which the cover is fixed and the opening of the cover faces downward, and a movable position in which the cover is positioned above the jetting position.

7. 7. The water jet apparatus of claim 6, wherein the frame includes a fixed frame that positions the support frame in the jetting position.

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