Hose feeding and cleaning device

Abstract

To provide a hose feeding and cleaning device capable of prolonging the life of a hose and minimizing a slip with the hose at a driving part.SOLUTION: The cleaning device includes a hose 33 in which a cleaning liquid supplied from a pump P flows, a nozzle 31 for jetting the cleaning liquid in the object W to be cleaned, a gun 11 in which the hose 33 moves back and forth, and a driving device 41 for moving the hose 33. The driving device 41 has an endless belt 51 for driving the hose 33, a pulley 43 and a pulley 45 around which the endless belt 51 is wound, a power source 49 for driving the pulley 43, and a pressing roller 61 for pressing the hose 33 to the endless belt 51. The endless belt 51 includes an outer circumferential belt 51a and an inner circumferential belt 51b. A brush 77 may be disposed outside the contact section between the endless belt 51 and the hose 33.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a hose feed cleaning device. [Background technology]

[0002] Conventionally, when cleaning the inside of pipes such as heat exchangers, a method is known in which a hose with a nozzle attached to the tip is inserted into the pipe. After the hose is inserted into the pipe, the nozzle that sprays the cleaning liquid is advanced until it reaches a predetermined depth, and then the nozzle is withdrawn. As the nozzle moves back and forth inside the pipe, a certain area inside the pipe is cleaned without interruption.

[0003] For example, the cleaning device disclosed in Patent Document 1 includes a nozzle that sprays liquid onto a workpiece (such as a tube for a heat exchanger), a hose that supplies the liquid to the nozzle, a conduit through which the nozzle travels, a feed roller that moves the hose back and forth, a drive unit that drives the feed roller, and a pressure roller that pairs with the feed roller. The hose is held between the feed roller and the pressure roller, and can be moved back and forth by the drive unit. The nozzle moves back and forth within the workpiece in conjunction with the hose. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-102545 Summary of the Invention [Problem to be solved by the invention]

[0005] When a feed roller is used to drive a hose, as in Patent Document 1, repeated back-and-forth movement of the hose with the feed roller pressed against it inevitably wears the outer sheath of the hose, shortening the lifespan of the hose. This hose wear is caused by a combination of various factors, including the speed at which the hose is driven and the temperature of the high-pressure cleaning fluid passing through the inside of the hose. Regardless of the factors, there has been a demand for a longer hose lifespan.

[0006] When a hose is driven by a feed roller, the contact area between the two is small, making it prone to slippage. During operation, the cleaning fluid sprayed from the nozzle may flow back along the outer circumference of the hose and remain attached to the periphery of the feed roller, making slippage even more likely.

[0007] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a hose-feed cleaning device that can extend the life of the hose and minimize slippage with the hose at the drive point. [Means for solving the problem]

[0008] A first aspect of the present invention is A hose through which the cleaning liquid supplied from the pump flows; a nozzle attached to a tip of the hose for spraying the cleaning liquid within the object to be cleaned; a gun facing the inlet of the object to be cleaned and through which the hose moves; a driving device that can move the hose in its longitudinal direction by an endless belt including an outer belt that contacts the hose and an inner belt that is joined to the inner peripheral surface of the outer belt; A hose feed cleaning device having the above structure.

[0009] The drive device may have at least a pair of pulleys around which the endless belt is wound, a power source for driving the pulleys, and a pressure roller arranged opposite the outer peripheral surface of the endless belt and pressing the hose against the endless belt.

[0010] The endless belt moves forward and backward by being driven by the pulley while in contact with the hose. The endless belt consists of an outer belt and an inner belt. A material that is less likely to slip is selected for the outer belt, taking into account contact with the hose. A material is selected for the inner belt, taking into account contact with the pulley. The endless belt may have teeth on the inner side to prevent slippage with the pulley. The power source may be an electric motor or an air motor, etc. Multiple pressure rollers may be arranged at a specified interval. The pressure rollers may be arranged so that they sandwich the endless belt and face the pulley.

[0011] The drive unit may have a brush that contacts the hose outside the contact area between the endless belt and the hose. The brush can remove foreign matter that adheres to the outer surface of the hose during cleaning and the cleaning liquid that flows along the outer surface of the hose after spraying, both before and after the drive unit. Removing the foreign matter and cleaning liquid improves the contact between the endless belt and the hose. The outside of the contact area between the endless belt and the hose is the area adjacent to the wrapping position of the endless belt and away from the endless belt. The brush may be composed of a center brush and side brushes so as to contact the entire circumference of the hose without any gaps. The center brush and side brushes may have different bristle lengths and directions.

[0012] At least one of the endless belt and the pressure roller may be movable in the width direction of the endless belt by a slide mechanism. By making at least one of the endless belt and the pressure roller movable, the contact area between the endless belt and the hose is expanded, and the life of the endless belt can be expected to be extended. It is preferable that the pressure roller has a function to prevent the hose from meandering. The slide mechanism is a linear guide, a long hole, etc.

[0013] The drive device may have a plurality of attitude adjustment means that come into contact with the ground, and each attitude adjustment means may be capable of changing the height at which the drive device is supported. The attitude adjustment means functions as legs that support the drive device. By individually changing the state of the attitude adjustment means, the attitude of the drive device can be freely adjusted. For example, by raising the nozzle side, the hose extending toward the nozzle will point upward, and its bend will be gentler. The ground may be a floor surface, etc.

[0014] The drive device may have a drain chamber in front of the contact area between the endless belt and the hose, where the hose is exposed to the air. By exposing the hose to the air in the drain chamber, the sprayed cleaning liquid flowing along the outer surface of the hose can fall. The front of the contact area between the endless belt and the hose is between the nozzle and the endless belt, an area adjacent to the wrapping position of the endless belt and separated from the endless belt. It is preferable to position the drain chamber facing the ground or the like so as not to interfere with drainage.

[0015] The contact section between the endless belt and the hose has a bottom roller that contacts the inner peripheral surface of the endless belt, and the pressure roller and the bottom roller may be arranged opposite each other with the endless belt sandwiched between them. By arranging the pressure roller and the bottom roller opposite each other, the hose can be stably sandwiched.

[0016] The contact section between the endless belt and the hose has a bottom roller that contacts the inner surface of the endless belt, and the pressure roller and the bottom roller may be located at different positions based on the direction of movement of the endless belt. In this case, the pressure roller presses the endless belt without being restricted by the bottom roller. The pressure roller presses the endless belt toward the inner circumference, applying tension to the endless belt.

[0017] At least one of the nozzle and the drive device may have a speed controller that sets the rotation speed of the power source, allowing the moving speed of the hose to be freely adjusted. [Effects of the Invention]

[0018] The present invention can extend hose life and minimize slippage with the hose at drive points. [Brief explanation of the drawings]

[0019] [Figure 1] A perspective view of a hose-feed cleaning device with the drive unit at the center. [Figure 2] A perspective view of a hose-fed cleaning device with the gun at the center [Figure 3] A perspective view showing the state during cleaning work [Figure 4] Cross-sectional view showing the inside of the object being cleaned [Figure 5] FIG. 1 is a side view of the drive unit, in which the bottom roller and the pressure roller are arranged opposite to each other. [Figure 6] FIG. 10 is a side view showing a second embodiment, in which the bottom roller and the pressure roller are spaced apart. [Figure 7] FIG. 10 is a longitudinal cross-sectional view showing a third embodiment, in which the contact position between the endless belt and the hose is movable. BEST MODE FOR CARRYING OUT THE INVENTION

[0020] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the accompanying drawings.

[0021] First Embodiment As shown in FIG. 1 etc., the hose feed cleaning device 1 of this embodiment has a gun 11 and a drive unit 41. The gun 11 is placed opposite the object to be cleaned W, such as the piping of a heat exchanger H. The gun 11 and the drive unit 41 are connected by a protective tube 35. A hose 33 is housed inside the protective tube 35. The base of the hose 33 is connected to a pump P. The pump P supplies high-pressure cleaning liquid to the hose 33. A nozzle 31 is incorporated into the tip of the hose 33 via a metal tube 32. The cleaning liquid that flows through the hose 33 is sprayed from the nozzle 31.

[0022] The gun 11 has a gun body 13, an insertion portion 15, a grip 17, an operating handle 19, and a discharge pipe 21. The drive unit 41 has a frame 53, a pulley 43, a power source 49, a pulley 45, a bottom roller 47, an endless belt 51, a pressure roller 61, a bracket 63, a hanging shaft 65, an elastic member 67, a movable frame 57, a base piece 54, a drive bolt 64, a horizontal plate 73, an attitude adjustment means 74, a brush 77, a connecting portion 79, and a speed controller 50.

[0023] The gun 11 is composed mainly of a cylindrical gun body 13. The gun body 13 is hollow, and a hose 33 is inserted into it. The insertion portion 15 is tapered and protrudes from one end of the gun body 13. The insertion portion 15 can be fitted into the entrance of the object to be cleaned W, such as a pipe, to close the entrance. The grip 17 and operating handle 19 are parts that are held by hand and used to hold the gun 11 during operation. The operating handle 19 has switches for turning the sprayed cleaning liquid on and off and for operating the drive unit 41.

[0024] The drive unit 41 functions to move the hose 33 in its longitudinal direction. The hose 33, metal tube 32, and nozzle 31 protruding from the insertion portion 15 of the gun 11 can automatically move back and forth inside the cleaning target W by the drive unit 41. The drive unit 41 is centered around a frame 53. A pulley 43 and a pulley 45 are attached to the frame 53. The pulleys 43 and 45 are spaced apart, and an endless belt 51 is wound around them to connect them. The endless belt 51 is tensioned to prevent slack. One of the pulleys 43 is connected to a power source 49 and drives the endless belt 51. The power source 49 is, for example, an air motor. The endless belt 51 moves the hose 33. The inner surface of the endless belt 51 may have teeth extending in the width direction to prevent slippage. In this case, the pulleys 43 and other parts that come into contact with the inner surface of the endless belt 51 also have teeth.

[0025] The pressure rollers 61 are disposed so as to face the outer peripheral surface of the endless belt 51. The pressure rollers 61 bring the hose 33 into close contact with the endless belt 51, preventing slippage between the endless belt 51 and the hose 33. The pressure rollers 61 are held by a bracket 63. The pressure rollers 61 are freely rotatable relative to the bracket 63. The pressure rollers 61 may be hourglass-shaped with a narrowed center to prevent the hose 33 from meandering. The outer peripheral surface of the pressure roller 61 may be simply cylindrical or may have a groove into which the hose 33 fits, and may be any other shape. A plurality of pressure rollers 61 may be disposed along the longitudinal direction of the hose 33. In FIG. 1, five pairs of pressure rollers 61 are lined up.

[0026] The hanging shaft 65 and movable frame 57 function to attach the pressure roller 61 to the drive unit 41. The hanging shaft 65 protrudes from the center of the bracket 63. The movable frame 57 has an L-shaped cross section, with its bottom surface positioned above the hose 33 and its side surface in contact with the frame 53. The tip of each hanging shaft 65 is inserted into the movable frame 57. The movable frame 57 connects all of the pressure rollers 61 via the hanging shaft 65. The hanging shaft 65 needs to be movable in the vertical direction relative to the movable frame 57 in the figure. A flange 68 is attached to the tip of the hanging shaft 65 protruding from the movable frame 57 to prevent it from coming off. The flange 68 prevents the pressure roller 61 from detaching from the movable frame 57.

[0027] The movable frame 57 and the bracket 63 are spaced apart in the vertical direction. An elastic member 67 is sandwiched between them, along the hanging shaft 65. The elastic member 67 constantly generates a reaction force in a direction that separates the movable frame 57 and the bracket 63. This reaction force urges the bracket 63 downward, bringing the pressure roller 61 into close contact with the hose 33. A coil spring may be used as the elastic member 67. In this case, the elastic member 67 is incorporated so as to surround the hanging shaft 65.

[0028] The movable frame 57 is movable in the vertical direction relative to the frame 53. The guides 55 function to smoothly move the movable frame 57. The guides 55 are attached to the frame 53 and sandwich the side end faces of the movable frame 57. The movable frame 57 is restricted by the guides 55 and moves smoothly without tilting.

[0029] The movable frame 57 has elongated holes 58 at both ends. Clampers 59 are inserted into the elongated holes 58. The clampers 59 can be manually operated to switch between close contact and non-close contact between the movable frame 57 and the frame 53. The movable frame 57 is fixed to the frame 53 by being brought into close contact with the frame 53 by the clampers 59. When the clampers 59 are switched to the non-close contact position, the movable frame 57 becomes movable along the elongated holes 58. The hose 33 can be brought into close contact with the endless belt 51 by moving the movable frame 57 downward. The clampers 59 are then switched to the close contact position to fix the movable frame 57 to the frame 53. The clampers 59 may be replaced with bolts or the like.

[0030] The thrust bolt 64 functions to move the movable frame 57 up and down. The base piece 54 protrudes from the wall surface of the frame 53 and holds the thrust bolt 64. The base piece 54 is integrated with the frame 53. The base piece 54 rotatably holds the base portion of the thrust bolt 64. The tip of the thrust bolt 64 is threadedly engaged with the movable frame 57. Rotating the thrust bolt 64 moves the movable frame 57. Rotating the thrust bolt 64 deforms all of the elastic members 67 simultaneously, bringing all of the pressure rollers 61 into close contact with the hose 33. The thrust bolt 64 can move the movable frame 57 minutely. Fine adjustment of the load pressing against the hose 33 can be easily performed depending on the diameter and material of the hose 33. To perform this fine adjustment quantitatively, a scale 66 or the like may be provided on the side surface of the hanging shaft 65. The amount of compression of the elastic members 67 can be read from the scale 66.

[0031] Before rotating the propulsion bolt 64, the clamper 59 is loosened in advance to allow the movable frame 57 to move. After rotating the propulsion bolt 64 and bringing the pressure roller 61 into close contact with the hose 33, the clamper 59 is tightened to fix the movable frame 57 to the frame 53. When passing the hose 33 through the drive device 41 prior to the cleaning operation, the clamper 59 is loosened and the pressure roller 61 is raised. The mechanism in the drive device 41 that brings the pressure roller 61 into close contact with the hose 33 is configured without using an air cylinder or the like. This achieves simplification and weight reduction of the device.

[0032] The bottom roller 47 is disposed on the inner peripheral side of the endless belt 51. The bottom roller 47 comes into contact with the endless belt 51 and restricts deformation of the endless belt 51. The bottom roller 47 and the pressure roller 61 are disposed opposite each other with the endless belt 51 interposed therebetween. The bottom roller 47 and the pressure roller 61 sandwich the hose 33 therebetween.

[0033] The material of the endless belt 51 can be freely selected. To ensure both friction and durability, the materials of the inner and outer circumferential sides may be different and integrated by adhesive or the like. The outer circumferential belt 51a located on the outer circumferential side may be made of natural rubber, for example. Natural rubber is less likely to slip. The inner circumferential belt 51b located on the inner circumferential side may be made of ether-based urethane, for example. Ether-based urethane is less likely to hydrolyze and has excellent water resistance. The pressure roller 61 may also be lined with urethane, rubber, or the like, taking into consideration the effect on the hose 33.

[0034] The connection part 79 is attached at a position where the hose 33 protrudes toward the gun 11. The connection part 79 has an appearance like an upside-down U, and the space in the center is a draining chamber 80. One side of the connection part 79 is attached to the frame 53, and the protective tube 35 is attached to the other side. The draining chamber 80 is open to the outside. The hose 33 passes through the connection part 79. In the draining chamber 80, the periphery of the hose 33 is open. After being sprayed from the nozzle 31, the cleaning liquid flows back between the protective tube 35 and the hose 33, reaches the draining chamber 80, and leaves the hose 33.

[0035] The brush 77 is disposed on the outside of the endless belt 51 in the drive unit 41. The brush 77 contacts the hose 33 to remove cleaning fluid and foreign matter adhering to the outer surface of the hose 33. Removing the cleaning fluid reduces friction with the endless belt 51, preventing slippage. Removing foreign matter prevents damage to the endless belt 51 and the pressure roller 61. In FIG. 1 , the brushes 77 are disposed in two locations to sandwich the contact area between the endless belt 51 and the hose 33. At each location, two brushes 77 face each other and sandwich the hose 33. Each brush 77 is divided into three sections in the width direction of the endless belt 51 so as to contact the entire circumference of the hose 33 without gaps. The central brush 77a, located in the center, has short bristles because it contacts the upper or lower part of the hose 33. The side brushes 77b, located on both sides, have long bristles because they contact the sides of the hose 33. The brushes 77 are attached to the frame 53 by some means.

[0036] The posture adjustment means 74 functions as a leg supporting the drive unit 41 and also adjusts the posture of the drive unit 41. The posture adjustment means 74 are distributed across multiple locations, such as the four corners of the drive unit 41. The posture adjustment means 74 in FIG. 1 is attached to a horizontal plate 73 that supports the frame 53. Two nuts 75 are threadedly engaged with the posture adjustment means 74, one at the top and one at the bottom. The horizontal plate 73 is sandwiched between the upper and lower nuts 75. The protruding length of the posture adjustment means 74 relative to the horizontal plate 73 can be adjusted by loosening the nuts 75. The protruding length is then fixed by tightening the nuts 75. Adjusting the protruding length allows the end of the protective tube 35 to be angled upward. This reduces bending of the protective tube 35, facilitating the movement of the hose 33. The posture adjustment means 74 can be freely selected from a variety of methods, including a screw mechanism as shown in the figure, a rod that can be freely advanced and retreated relative to the drive unit 41, and a "hook" fastener.

[0037] A speed controller 50 is provided behind the frame 53. The speed controller 50 can change the rotation speed of the power source 49 to adjust the moving speed of the hose 33. The speed controller 50 may be attached to the gun 11 side. The moving speed of the hose 33 may be set to a maximum of about 80 m per minute.

[0038] FIG. 2 shows the hose feed cleaning device 1, with the gun 11 at its center. The gun 11 is composed of a cylindrical gun body 13 as its core. To facilitate smooth cleaning operations, the gun body 13 is equipped with a grip 17, a sling 18, and an operating handle 19. The sling 18 is located at two locations, one at the front and one at the back of the gun body 13. A belt can be attached to connect the two slings 18 and worn over the shoulder to reduce the burden on the worker during operation. The gun body 13 has a discharge pipe 21 at its base. The discharge pipe 21 serves to discharge the cleaning liquid to the outside after it has been sprayed from the nozzle 31. Pipes can also be attached to the discharge pipe 21 to direct the cleaning liquid to a distant location.

[0039] The grip 17, the sling 18, and the operating handle 19 are all attached to the gun body 13 via a collar 16. The collar 16 is separable and can be attached and detached from the gun body 13. The attachment position of the collar 16 is adjustable. The grip 17, the sling 18, and the operating handle 19 can be optimally positioned based on the working posture, etc.

[0040] The gun 11 and the drive unit 41 are connected by a protective tube 35. The hose 33 is housed inside the protective tube 35. The protective tube 35 is made of a flexible material, such as a flexible tube or metal mesh, so as not to interfere with handling of the gun 11. The protective tube 35 restricts the hose 33 from freely bending when the hose 33 is moved by the drive unit 41. When the hose 33 is advanced by the drive unit 41, the hose 33 advances along the protective tube 35, and the nozzle 31 also advances by that amount.

[0041] The drive device 41 has an introduction section 76 that surrounds the hose 33 at the location where the hose 33 protrudes toward the pump P. The introduction section 76 has the function of guiding the hose 33 to the endless belt 51. The interior of the introduction section 76 may have sufficient space for the hose 33. A stopper 34 is attached to the hose 33 in the section from the pump P to the drive device 41. The stopper 34 has the function of restricting the range of movement when the drive device 41 moves the hose 33. The stopper 34 comes into contact with the introduction section 76, preventing further movement. The introduction section 76 may be made of various engineering plastics with excellent strength, taking into account contact with the stopper 34.

[0042] FIG. 3 shows the state during cleaning operation. The operator inserts the insertion portion 15 of the gun 11 into the entrance of the object to be cleaned W and sprays the cleaning liquid into the object to be cleaned W. The cleaning liquid may be pressurized to approximately 10 to 100 MPa. The operator operates the operating handle 19 to activate the drive unit 41. The hose 33 is advanced by the drive unit 41 and sent into the object to be cleaned W. After the stopper 34 contacts the introduction portion 76, the drive unit 41 retracts the hose 33. As the hose 33 advances and retracts, its range of movement is continuously cleaned. A portion of the sprayed cleaning liquid flows into the gun body 13 and is discharged to the outside through the discharge pipe 21. The remainder travels through the protective pipe 35, reaches the connection portion 79, and is discharged from the drain chamber 80. The cleaning liquid surrounding the outer surface of the hose 33 is also removed by the brush 77 (shown in FIG. 1). By these means, the cleaning liquid is removed from the contact section between the endless belt 51 and the hose 33, and a decrease in friction is suppressed.

[0043] To ensure smooth movement of the hose 33, it is preferable to prevent bending of the protective tube 35. Therefore, the protruding lengths of the position adjustment means 74 relative to the horizontal plate 73 may be individually adjusted to tilt the drive unit 41. In FIG. 3, the position adjustment means 74a located on the protective tube 35 side protrudes significantly downward, and the position adjustment means 74b on the opposite side protrudes significantly upward. The protective tube 35 adjacent to the connection portion 79 faces diagonally upward. This prevents bending of the protective tube 35, making it easier for the hose 33 to move in and out.

[0044] FIG. 4 shows the state in which the inside of the object to be cleaned W is being cleaned. The insertion portion 15 of the gun 11 is fitted into the entrance of the object to be cleaned W. A hose 33 is housed inside the gun body 13. A nozzle 31 is attached to the tip of the hose 33 via a metal tube 32. The nozzle 31 is initially positioned near the insertion portion 15, as shown in the upper part of FIG. 4. Thereafter, the drive unit 41 is operated to move the hose 33 forward, and the nozzle 31 moves deeper into the object to be cleaned W, as shown in the lower part of FIG. 4. During this time, cleaning liquid continues to be sprayed from the nozzle 31, and the object to be cleaned W is cleaned over the entire range in which the nozzle 31 has moved.

[0045] The sprayed cleaning liquid flows back around the outer periphery of the hose 33 and returns to the inside of the gun body 13. This returned cleaning liquid is discharged from the discharge pipe 21 and also passes through the protective pipe 35 and is discharged from the drain chamber 80 of the drive unit 41. After the nozzle 31 has been advanced, the hose 33 is retracted by the drive unit 41. When advancing the nozzle 31, by adjusting the fixing position of the stopper 34 (disclosed in FIG. 3, etc.) in advance, it is possible to easily know when the nozzle 31 has reached a predetermined depth.

[0046] FIG. 5 is a side view of the drive unit 41. In this figure, five pressure rollers 61 are lined up along the longitudinal direction of the hose 33. The pressure rollers 61 at both ends face the pulleys 43 and 45, sandwiching the hose 33 between them. The remaining pressure roller 61 in the middle faces the bottom roller 47, sandwiching the hose 33 between them. The pressure rollers 61 press the hose 33 against the endless belt 51. The hose 33 moves integrally with the endless belt 51. The endless belt 51 is configured by joining an outer peripheral belt 51a and an inner peripheral belt 51b. The outer peripheral belt 51a and the inner peripheral belt 51b are made of different materials.

[0047] Second Embodiment FIG. 6 shows a case in which the bottom roller 47 and the pressure roller 61 are spaced apart. In this figure, one bottom roller 47 is located midway between the drive pulley 43 and the driven pulley 45. Four pressure rollers 61 are located. The pressure rollers 61 at both ends face the pulleys 43 and 45. The remaining middle pressure rollers 61 are located away from the bottom roller 47. The middle pressure rollers 61 press against the hose 33 and the endless belt 51 without being pushed back by the bottom roller 47. The hose 33 and the endless belt 51 are pressed by both the bottom roller 47 and the pressure roller 61, causing them to deform into a zigzag shape. This deformation prevents the endless belt 51 from loosening. In this embodiment, the hose 33 is in close contact with the endless belt 51 even at positions away from the bottom roller 47 and the pressure roller 61.

[0048] Third Embodiment 7 shows a case where the contact position between the endless belt 51 and the hose 33 is movable in the width direction of the endless belt 51. In order to extend the life of the endless belt 51, it is preferable to move the contact position between the endless belt 51 and the hose 33 in the width direction of the endless belt 51, thereby expanding the contact area between them. To achieve this, as shown in FIG. 7, the pressure roller 61 can also be made movable in the width direction of the endless belt 51.

[0049] In Figure 7, the frame 53 is cut at a certain height and divided into a lower frame 53a and an upper frame 53b. A flange 53c is formed on each of the contact surfaces between the lower frame 53a and the upper frame 53b. A slide mechanism 78 is sandwiched between the contact surfaces of both flanges 53c. The slide mechanism 78 allows the upper frame 53b to move in the width direction of the endless belt 51. The slide mechanism 78 in the figure is assumed to be a linear guide.

[0050] The pressure roller 61 is attached to the bracket 63 via a central shaft 69. The pressure roller 61 is freely rotatable. The endless belt 51 is supported by a bottom roller 47. The bottom roller 47 is attached to the lower frame 53a via a support shaft 48. The bottom roller 47 is freely rotatable.

[0051] 7, the lower frame 53a and the upper frame 53b are normally aligned without any step. In this case, the center of the pressure roller 61 is aligned with the center of the endless belt 51. The hose 33 contacts the center of the endless belt 51.

[0052] As shown on the right side of Figure 7, the upper frame 53b can be moved by a slide mechanism 78. This movement causes the lower frame 53a and the upper frame 53b to be stepped rather than in a straight line. The movable frame 57 moves integrally with the upper frame 53b. The pressure roller 61 approaches the lower frame 53a. The hose 33 follows the pressure roller 61 and comes into contact with the endless belt 51 at a position away from the center. The slide mechanism 78 also requires a means for restricting movement as necessary.

[0053] There are various other configurations for making the pressure roller 61 movable. For example, the endless belt 51 may be moved without moving the pressure roller 61. A part of the movable frame 57 may be deformed to make the area from the hanging shaft 65 to the pressure roller 61 movable.

[0054] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the gist of the present invention, and all technical matters included in the technical ideas described in the claims are subject to the present invention. The above-described embodiments are preferred examples, but a person skilled in the art can realize various alternatives, modifications, variations, or improvements from the contents disclosed in this specification, and these are included in the technical scope described in the appended claims. [Explanation of symbols]

[0055] 1 Hose feed cleaning device 11 Gun 13 Gun body 15 Insertion part 16 colors 17 Grip 18 Lifting equipment 19 Operating handle 21 Discharge pipe 31 nozzles 32 Metal tube 33 Hose 34 Stopper 35 Protection tube 41 Drive unit 43 Pulley (drive side) 45 Pulley (driven side) 47 Bottom Roller 48 Support shaft 49 Power source 50 Speed ​​Controller 51 endless belt 51a Outer belt 51b Inner belt 53 frames 53a Lower frame 53b Upper frame 53c flange 54 Foundation Piece 55 Guide 57 Movable frame 58 long hole 59 Clamper 61 Presser roller 63 Bracket 64 Propulsion Bolt 65 Hanging shaft 66 scales 67 Elastic material 68 Spit 69 Center axis 73 Horizontal board 74, 74a, 74b Posture adjustment means 75 Nut 76 Introduction 77 Brush 77a Center Brush 77b Side brush 78 Slide mechanism 79 Connection 80 Draining Room H heat exchanger P pump W Cleaning target (pipes, etc.)

Claims

1. A hose through which the cleaning fluid supplied from the pump flows, A nozzle attached to the tip of the hose for spraying the cleaning solution into the object to be cleaned, A gun facing the entrance to the object to be cleaned, through which the hose moves back and forth, A drive device that can move the hose in its longitudinal direction using an endless belt including an outer belt that contacts the hose and an inner belt that is joined to the inner surface of the outer belt, A hose-feed cleaning device having a hose.

2. The drive device is The endless belt is wound around at least one pair of pulleys, A power source for driving the pulley, A pressing roller is positioned to face the outer circumferential surface of the endless belt and to press the hose against the endless belt, A hose-feeding cleaning device according to claim 1, having the following features.

3. The hose feeding and cleaning device according to claim 1 or 2, wherein the drive device has a brush that contacts the hose on the outside of the contact section between the endless belt and the hose.

4. The hose feeding and cleaning device according to claim 3, wherein the brush comprises a central brush that contacts the upper and lower parts of the hose, and side brushes that contact the sides of the hose.

5. The hose feeding and cleaning device according to claim 2, wherein at least one of the endless belt and the retaining roller is movable in the width direction of the endless belt by a sliding mechanism.

6. The hose feeding and cleaning device according to claim 1 or 2, wherein the drive unit has a plurality of posture adjustment means that contact the ground, and each of the posture adjustment means is capable of changing the height at which it supports the drive unit.

7. The hose feeding and cleaning device according to claim 1 or 2, wherein the drive unit has a drainage chamber in front of the contact section between the endless belt and the hose, in which the hose is exposed to the air.

8. The hose feeding and cleaning device according to claim 2, wherein the contact section between the endless belt and the hose has a bottom roller that contacts the inner circumferential surface of the endless belt, and the pressing roller and the bottom roller are arranged opposite each other with the endless belt in between.

9. The hose feeding and cleaning device according to claim 2, wherein the contact section between the endless belt and the hose has a bottom roller that contacts the inner circumferential surface of the endless belt, and the pressing roller and the bottom roller are arranged in different locations with respect to the direction of movement of the endless belt.

10. The hose-feeding cleaning device according to claim 2, wherein at least one of the nozzle and the drive device has a speed controller for setting the rotational speed of the power source.

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