JP3939598B2 - Cleaning nozzle moving device for cleaning vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cleaning nozzle moving device for a cleaning vehicle in which a cleaning nozzle for cleaning a wall surface is raised and lowered with respect to a vehicle body.
[0002]
[Prior art]
In general, wall surfaces such as non-light-transmitting sound-insulating walls and light-transmitting sound-insulating walls installed on the side of motorways are contaminated with exhaust gas and dust, so it is necessary to clean them regularly to restore their aesthetics and functions. There is. Therefore, the wall surface is cleaned using a cleaning vehicle including a cleaning nozzle that cleans the wall surface.
[0003]
[Problems to be solved by the invention]
By the way, depending on the environment around the road, the height of the wall surface may be set high. In that case, the cleaning nozzle is supported by a lifting member that can be moved up and down with respect to the vehicle body, and the lifting member is moved up and down by a lifting cylinder or the like so that the cleaning liquid can be efficiently sprayed even on a high wall surface. Has been done.
[0004]
However, depending on the structure of the wall surface and the shape of the roadway on the side of the wall surface, the vehicle body cannot be brought close to the wall surface, and there may be a considerable space between the wall surface and the cleaning nozzle. There is a problem that the momentum of the cleaning water to be injected is insufficient, and the cleaning liquid from the cleaning nozzle cannot be efficiently injected onto the wall surface.
[0005]
The present invention has been made in view of such a point, and the object of the present invention is to reduce the interval between the wall surface and the cleaning nozzle regardless of the structure of the wall surface or the shape of the traveling path on the side of the wall surface. Another object of the present invention is to provide a cleaning nozzle moving device for a cleaning vehicle capable of efficiently injecting the cleaning liquid from the cleaning nozzle onto the wall surface.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the solution provided by the invention according to claim 1 is premised on a cleaning nozzle moving device of a cleaning vehicle in which a cleaning nozzle for cleaning a wall surface is raised and lowered with respect to the vehicle body. And
Elevating mechanism that supports the cleaning nozzle to be movable up and down with respect to the vehicle body, elevating and moving means for moving the elevating mechanism up and down, a rear tube provided in the elevating mechanism, and a low pressure cleaning nozzle provided in the rear tube When the front side tube of reciprocating members which are movably supported to the vehicle body outside direction with respect to the lifting mechanism, and a high-pressure cleaning nozzle provided in the front side tube body inside and outside the high-pressure cleaning nozzle relative to the lifting mechanism In order to move forward and backward in the direction, the front tube moves forward and backward .
[0007]
Due to this specific matter, when the vehicle body cannot be brought close to the wall surface due to the structure of the wall surface or the shape of the roadway on the side of the wall surface, the advancing / retracting member is moved outwardly with respect to the lifting mechanism that raises and lowers the cleaning nozzle relative to the vehicle body. By advancing, the cleaning nozzle moves forward and backward to the outside of the vehicle body, and the interval between the wall surface and the cleaning nozzle is reduced. Thereby, the momentum of the cleaning water sprayed from the cleaning nozzle is sufficiently secured, and the cleaning liquid from the cleaning nozzle can be efficiently sprayed onto the wall surface.
[0011]
The solution according to the invention according to claim 2 is that the fluid pressure cylinder is applied as the advancing / retreating means, and the rod side chamber of the fluid pressure cylinder that returns the fluid to the tank when the front tube moves forward to the outside of the vehicle body or A stop valve that seals the return of fluid to the tank is interposed in the middle of the flow path between the anti-rod side chamber and the tank so as to prohibit unnecessary movement of the front tube to the outside of the vehicle body. .
[0012]
Due to this specific matter, the fluid is returned from the rod side chamber or the non-rod side chamber of the fluid pressure cylinder to the tank via the flow path by the centrifugal force that acts when the cleaning vehicle makes a turn during normal driving, and the front side Problems such as moving the tube to the outside of the vehicle body are reliably prevented. As a result, it is possible to reliably inhibit the unnecessary movement of the front side tube toward the outside of the vehicle body during normal traveling of the cleaning vehicle.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
FIG. 1 is a side view of a cleaning vehicle provided with the cleaning nozzle moving device of the present invention, FIG. 2 is a plan view of the vehicle, and FIG. 3 is a rear view of the vehicle.
[0017]
1 to 3, a cleaning vehicle 1 cleans a wall surface such as a sound insulation wall (not shown) standing on the left side of a road during traveling. A pair of left and right main frames 11 extending in the direction are provided. A cabin 12 is provided at the front of each main frame 11, and an engine (not shown) for driving the vehicle is mounted below the cabin 12.
[0018]
A sub-frame 13 is provided on the rear part of each main frame 11. A pump driving device 2 is mounted on the front portion of each sub-chassis 13. A water tank 3 is mounted on the central portion of each sub-chassis 13, and a nozzle routing unit 4 is provided on the rear portion of each sub-chassis 13. Display lamps 14 and 14 are provided on the cabin 12 of the cleaning vehicle 1 and the rear end of the water tank 3 to notify the front and rear of the vehicle body 10 that the cleaning operation is in progress.
[0019]
As shown in FIGS. 4 and 5, the pump drive device 2 includes an independent engine 21 that is driven separately from the vehicle drive engine, and water from the water tank 3 into a high-pressure washing nozzle 41 (described later). A high pressure water pump 22 (water pump) to be supplied, a low pressure water pump 23 (water pump) for supplying water from the water tank 3 to a low pressure washing nozzle 42 (described later), and a nozzle lifting and lowering device 47 described later. A hydraulic pump 24 that supplies pressure oil and a cleaning liquid unit 25 that sprays the cleaning liquid onto the wall surface are provided.
[0020]
The independent engine 21 is configured to be driven by a diesel engine having a clutch mechanism. An output shaft 21b of the independent engine 21 is connected to a common shaft 26d of the first to third pulleys 26a to 26c rotatably supported on the vehicle body 10 so as to be integrally rotated.
[0021]
The high-pressure water pump 22 is disposed on the left side of the output shaft 21 b of the independent engine 21. The input shaft 22a of the high-pressure water pump 22 is rotatably connected to a shaft 26f of a fourth pulley 26e that is rotatably supported on the vehicle body 10. A first V-belt 27a is wound between the fourth pulley 26e and the corresponding central second pulley 26b, and the output shaft 21b of the independent engine 21 to the shaft 26d, the second pulley The high-pressure water pump 22 is driven by the driving force transmitted through 26b, the first V belt 27a, the fourth pulley 26e, the shaft 26f, and the input shaft 22a. 4 and 5, reference numeral 29 denotes an idler pulley that applies a constant tension to the first V-belt 27 a and is supported so as to be movable in the vertical direction with respect to the vehicle body 10.
[0022]
The low-pressure water pump 23 is disposed on the right side of the first to third pulleys 26a to 26c. A fifth pulley 23b is connected to the input shaft 23a of the low-pressure water pump 23 in an integrated manner. A second V belt 27b is wound between the fifth pulley 23b and the front first pulley 26a corresponding to the fifth pulley 23b. From the output shaft 21b of the independent engine 21 to the shaft 26d, the first pulley The low-pressure water pump 23 is driven by the driving force transmitted through 26a, the second V belt 27b, the fifth pulley 23b, and the input shaft 23a.
[0023]
Further, the hydraulic pump 24 is disposed on the left side of the third pulley 26c. A sixth pulley 24b is rotatably connected to the input shaft 24a of the hydraulic pump 24. A third V belt 27c is wound between the sixth pulley 24b and the corresponding third pulley 26c on the rear side, and the output shaft 21b to the shaft 26d, the third The hydraulic pump 24 is driven by the driving force transmitted through the pulley 26c, the third V belt 27c, the sixth pulley 24b, and the input shaft 24a.
[0024]
As described above, the high-pressure water pump 22, the low-pressure water pump 23, and the hydraulic pump 24 are connected to the independent engine 21 by the first to sixth pulleys 26a to 26c, 26e, 23b, 24a and the first to third V belts 27a to 27c, respectively. It is connected so that power transmission is possible via.
[0025]
Also, as shown in FIGS. 1 and 2, the cleaning liquid unit 25 includes a cleaning tube 25a that is vertically movable on the left side of the front end of the pump drive device 2, and a predetermined interval in the vertical direction of the cleaning tube 25a. A plurality of cleaning nozzles 25b,..., A lifting cylinder 25c that moves the cleaning tube 25a up and down by power supply from a vehicle battery (not shown), a cleaning liquid tank 25d disposed on the left side of the independent engine 21, A cleaning liquid pump (not shown) that is driven by an electric motor (not shown) that is driven by power supplied from a vehicle-mounted battery, supplies cleaning liquid stored in the cleaning tank 25d to the cleaning tube 25a via a cleaning hose (not shown). (Not shown).
[0026]
As said water tank 3, what exhibits the cylindrical shape which can accommodate 5400 liters of water, for example is used. The water tank 3 is placed in a horizontally placed state with its axis extending in the front-rear direction.
[0027]
As shown in FIG. 3, the nozzle routing unit 4 includes a high-pressure cleaning nozzle 41 for cleaning the wall surface at high pressure, a low-pressure cleaning nozzle 42 for cleaning the wall surface at low pressure, and a hand gun (not shown). On the other hand, a small hose reel 44 that winds up a lead-out portion of a high-pressure water supply hose (not shown) that supplies high-pressure water from the high-pressure water pump 22 and a self-propelled type that cleans while self-propelled in a pipe not shown A large hose reel 46 that winds a lead-out portion of a high-pressure water supply hose (not shown) that supplies high-pressure water from the high-pressure water pump 22 to a nozzle (not shown), and a pressure supplied from the hydraulic pump 24 A cleaning nozzle moving device 47 that moves the high-pressure cleaning nozzle 41 and the low-pressure cleaning nozzle 42 by oil is provided. In this case, the high-pressure water from the high-pressure water pump 22 is selectively switched by a switching valve (not shown) and supplied to the high-pressure washing nozzle 41, the hand gun, and the self-propelled nozzle.
[0028]
As shown in FIG. 6, the high-pressure cleaning nozzles 41 are provided at predetermined intervals in the vertical direction on a frame-like front tube 41 a as an advancing and retracting member extending in the vertical direction on the left side of the front part of the nozzle wiring unit 4. ing. The low-pressure cleaning nozzles 42 are provided at predetermined intervals in the vertical direction on the rear tube 42b extending in the vertical direction on the rear left side of the nozzle wiring unit 4. The high-pressure cleaning nozzle 41 and the low-pressure cleaning nozzle 42 are configured to inject high-pressure water and low-pressure water in a direction facing the left wall of the vehicle body 10 when the cleaning vehicle 1 travels on the shoulder (toward the left side). It is configured. As shown in FIG. 2, the small hose reel 44 is arranged on the right side of the front part of the nozzle arrangement unit 4, and the large hose reel 46 is arranged on the right side of the rear part of the nozzle arrangement unit 4.
[0029]
As a characteristic part of the present invention, as shown in FIGS. 7 to 10, the cleaning nozzle moving device 47 includes an elevating mechanism 48, and this elevating mechanism 48 is fixed to the left side of the vehicle body 10 outwardly. A frame-shaped first frame 47a, a frame-shaped second frame 47b supported so as to be vertically movable relative to the first frame 47a, and pressure oil supplied from the hydraulic pump 24 to the second frame 47b And a lifting / lowering cylinder 47c that is lifted and lowered by a frame, a frame-shaped third frame 47d that is supported so as to be vertically liftable with respect to the second frame 47b, and a lifting / lowering means 49 that lifts and lowers the third frame 47d with respect to the second frame 47b. And. As shown in FIG. 6, the front frame 41a and the rear tube 42a are supported on the third frame 47d, and the high pressure washing nozzle 41 and the rear tube 42a of the front tube 41a are supported by the elevating cylinder 47c. The low-pressure washing nozzles 42 are moved up and down.
[0030]
Further, as shown in FIG. 11, the rear tube 42a is fixed to the third frame 47d, whereas the front tube 41a advances and retreats outward of the vehicle body 10 with respect to the third frame 47d. Advancing and retracting cylinder 47e as a fluid pressure cylinder that is freely supported and expands and contracts by the pressure oil supplied from the hydraulic pump 24 moves in and out of the vehicle body. As shown in FIG. 12, the advance / retreat cylinder 47e is configured to expand and contract by a three-position electromagnetic switching valve 51 that is switch-controlled by a control means (not shown). The three-position electromagnetic switching valve 51 supplies the oil supplied from the oil tank 52 as a tank by the hydraulic pump 24 via the oil supply pipe 53 and the first oil passage 54 (distribution passage) to the rod side chamber 47R ( 12 is supplied to the upper chamber in FIG. 12, while the oil in the non-rod side chamber 47H (lower chamber in FIG. 12) is returned to the oil tank 52 via the second oil passage 55 and the discharge oil passage 56. In FIG. 12, the oil is supplied from the oil tank 52 through the oil supply pipe 53 and the second oil passage 55 to the anti-rod side chamber 47H of the advance / retreat cylinder 47e, while the rod side chamber 47R. Is returned to the oil tank 52 through the first oil passage 54 and the discharge oil passage 56 (see FIG. 12). The upper position) is switched from the hydraulic pump 24 neutral position to prohibit the supply of oil through the oil supply pipe 53 (position shown in FIG. 12). A two-position switching valve 57 is interposed in the middle of the second oil passage 55, and the two-position switching valve 57 has a flow position that allows oil to flow to the non-rod side chamber 47H of the advance / retreat cylinder 47e. , And can be switched to a blocking position for blocking the flow of oil. Then, in the middle position of the second oil passage 55, the return of oil from the rod side chamber 47R of the advance / retreat cylinder 47e to the oil tank 52 is prohibited so as to prohibit unnecessary advance movement of the front tube 41a to the outside of the vehicle body. A two-position switching valve 58 is interposed as a stop valve for sealing. The two-position switching valve 58 can be switched between a flow position that allows oil to return (flow) from the rod side chamber 47R of the advance / retreat cylinder 47e to the oil tank 52 and a blocking position that blocks oil return. ing.
[0031]
As shown in FIGS. 7 to 10, the elevating means 49 includes a pair of front and rear upper sheaves 49a and 49a rotatably supported on the upper end of the second frame 47b, and one end of the third frame 47d. The first wire ropes 49b and 49b (the first wire ropes 49b and 49b) are respectively fixed to the lower ends and the other ends are fixed to the lower ends of the first frames 47a. Rope), a pair of front and rear lower sheaves 49c, 49c rotatably supported by the lower end of the second frame 47b, one end fixed to the lower end of the third frame 47d and the other end of the first frame. Second wire ropes 49b and 49d (second wires) fixed to the upper end of the frame 47a and folded back with the midway part of the lower sheave 49c. And it includes a-loop) and.
[0032]
Further, as shown in FIGS. 13 to 15, the front tube 41 a is located on the left side of the vehicle body 10 on the side where the front side tube 41 a extends outward from the high pressure washing nozzle 41, specifically on the left side of the pump drive device 2. The surface is provided with an obstacle detection arm 6 that detects in advance the contact of the obstacle with each high-pressure washing nozzle 41.
[0033]
The obstacle detection arm 6 includes a stay member 61 fixed to the left side surface of the pump drive device 2 and an arm main body that is supported by the stay member 61 so as to be pivotable rearward in the horizontal direction via a shaft 64. 62 and a spring 63 hung between the arm main body 62 and the stay member 61. Further, the obstacle detection arm 6 protrudes so that the tip of the arm body 62 is located outward from the advance position of each high-pressure washing nozzle 41 advanced to the outside of the vehicle body by the front side tube 41a. It is converted into a projecting position for detecting contact, and a lying position that turns to the rear of the vehicle body due to contact with an obstacle and falls along the outer surface of the vehicle body. The spring 63 is supported via a hook 61a that is rotatable with respect to the stay member 61, and the arm main body 62 projects from the dead point of the arm main body 62 (position indicated by a one-dot chain line in FIG. 13). It is comprised so that it may urge to the side or the lodging position side. That is, when the arm main body 62 exceeds the dead point due to contact with an obstacle, the tip of the arm main body 62 comes into contact with the left side surface of the pump drive device 2 on the lying down position side by the urging force of the spring 63, It is detected that each high-pressure washing nozzle 41 in the advanced position comes into contact with an obstacle by contact sound. In this case, a pad 65 is attached to the left side surface of the pump drive device 2 with which the tip of the arm main body 62 comes into contact, so that the contact of the tip of the arm main body 62 is alleviated.
[0034]
Therefore, in the above embodiment, the cleaning nozzle moving device is used when the vehicle body 10 cannot be brought close to the wall surface due to the structure of the wall surface, the shape of the traveling path on the side of the wall surface, etc. The elevating cylinder 47c of 47 (elevating mechanism 48) is extended to raise the second frame 47b with respect to the first frame 47a, and the third frame 47d is raised with respect to the second frame 47b by the elevating means 49 to move the front tube After the 41a and the rear tube 42a are moved up, the front tube 41a is moved out of the vehicle body by the advance / retreat cylinder 47e with respect to the third frame 47d, whereby each high-pressure washing nozzle 41 moves out of the vehicle body. The distance between the wall surface and each high-pressure washing nozzle 41 can be reduced, Will be able to force the high-pressure water jetted from the high-pressure cleaning nozzle 41 is efficiently inject high pressure water to fully reserved in the wall.
[0035]
Further, when raising each high pressure washing nozzle 41 and each low pressure washing nozzle 42, when the elevating cylinder 47c is extended, the second frame 47b rises together with the upper end sheave 49a with respect to the first frame 47a, and this second frame. Simultaneously with the rise of 47b, the third frame 47d is pulled up with respect to the second frame 47b by the first wire rope 49b. As a result, the high-pressure cleaning nozzles 41 and the low-pressure cleaning nozzles 42 are raised at a speed double the rising speed of the second frame 47b, and the high-pressure cleaning nozzles 41 and the low-pressure cleaning nozzles 42 can be quickly positioned at the ascending positions.
[0036]
On the other hand, when lowering each high pressure washing nozzle 41 and each low pressure washing nozzle 42, when the elevating cylinder 47c is contracted, the second frame 47b is lowered together with the lower end sheave 49c with respect to the first frame 47a. Simultaneously with the lowering of 47b, the third frame 47d is pulled down with respect to the second frame 47b by the second wire rope 49d. As a result, the high-pressure washing nozzles 41 and the low-pressure washing nozzles 42 are lowered at a speed twice the lowering speed of the second frame 47b, and the high-pressure washing nozzles 41 and the low-pressure washing nozzles 42 are quickly lowered at places where the height is limited. Thus, interference with obstacles can be avoided promptly.
[0037]
Then, when the front tube 41 a is moved outward from the vehicle body, it is not necessary at a position in the middle of the second oil passage 55 between the rod side chamber 47 </ b> R of the advance / retreat cylinder 47 e that returns the oil to the oil tank 52 and the oil tank 52. A two-position switching valve 58 is provided to seal the return of oil from the rod side chamber 47R of the advance / retreat cylinder 47e to the oil tank 52 so as to prohibit the forward movement of the front tube 41a to the outside of the vehicle body. Oil is returned from the rod side chamber 47R of the advancing / retreating cylinder 47e to the oil tank 52 via the second oil passage 55 by the centrifugal force that acts when the cleaning vehicle 1 makes a turn during normal traveling, and the front tube 41a. Such a problem that the vehicle is moved out of the vehicle body is reliably prevented. Thereby, the advance movement of the front tube 41a to the outside of the vehicle body during the normal traveling of the cleaning vehicle 1 can be reliably prohibited.
[0038]
Further, an obstacle detection arm 6 for detecting the contact of the obstacle with each high-pressure washing nozzle 41 in advance is provided on the left side surface of the pump drive device 2, and the arm main body 62 is located more than the advance position of each high-pressure washing nozzle 41. It is converted into a projecting position that projects so that the tip is located outward and detects contact with an obstacle, and a lying position that rotates backward on the vehicle body due to contact with the obstacle and falls along the outer surface of the vehicle body Therefore, when the arm main body 62 exceeds the dead point due to contact with an obstacle, the tip of the arm main body 62 abuts against the pad 65 on the left side surface of the pump drive device 2 by the biasing force of the spring 63, It is detected by the contact sound that each high-pressure cleaning nozzle 41 in the advanced position contacts an obstacle, and the contact of the obstacle with each high-pressure cleaning nozzle 41 can be detected in advance. Kill.
[0039]
【The invention's effect】
In summary, according to the invention according to claim 1, the cleaning vehicle carries out the wall cleaning operation by supporting the advance / retreat member so as to be able to advance and retract in and out of the vehicle body with respect to the lifting mechanism that raises and lowers the cleaning nozzle relative to the vehicle body. When the vehicle body cannot be brought close to the wall surface, the advancement / retraction member is advanced to the outside of the vehicle body to reduce the space between the cleaning nozzle and the wall surface to ensure sufficient momentum of the cleaning water from the cleaning nozzle. Thus, the cleaning liquid from the cleaning nozzle can be efficiently injected onto the wall surface.
[0041]
Then, according to according to claim 2 in accordance invention, reliably preventing the advancing movement towards the outside of the vehicle body of the front side tube by the normal centrifugal force when subjected to such turning during running of the cleanup vehicle, normal cleaning vehicle It is possible to reliably prohibit the forward movement of the unnecessary front side tube outside the vehicle body during traveling.
[Brief description of the drawings]
FIG. 1 is a side view of a cleaning vehicle including a cleaning nozzle moving device according to an embodiment of the present invention.
FIG. 2 is a plan view of the cleaning vehicle.
FIG. 3 is a rear view of the cleaning vehicle.
FIG. 4 is a plan view in which a part of the pump drive device is cut away.
FIG. 5 is a rear view of the pump drive device as viewed from the rear.
FIG. 6 is a front view of the cleaning nozzle moving device as viewed from the left side of the vehicle body.
FIG. 7 is a front view of the lifting mechanism as viewed from the left side of the vehicle body.
8 is a cross-sectional view taken along line AA in FIG.
9 is a cross-sectional view taken along line BB in FIG.
10 is a cross-sectional view taken along the line CC of FIG.
11 is a cross-sectional view taken along the line DD of FIG.
FIG. 12 is an oil piping diagram showing an oil flow path with respect to the advance / retreat cylinder.
FIG. 13 is a plan view of an obstacle detection arm as viewed from above.
FIG. 14 is a view of an obstacle detection arm as seen from the inside of the vehicle body.
15 is a cross-sectional view taken along line EE in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cleaning vehicle 10 Car body 24 Hydraulic pump 41 High pressure washing nozzle (washing nozzle)
41a Front tube (advance / retreat member)
42 Low pressure cleaning nozzle (cleaning nozzle)
47 Cleaning nozzle moving device 47a First frame 47b Second frame 47c Elevating cylinder (elevating / moving means)
47d Third frame 47e Advance / retreat cylinder (advance / retreat movement means)
47R Rod side chamber of advance / retreat cylinder 47H Counter rod side chamber of advance / retreat cylinder 48 Lift mechanism 49a Upper end sheave 49b First wire rope (first rope)
49c Lower end sheave 49d Second wire rope (second rope)
52 Oil tank
58 2-position switching valve (stop valve)
6 Obstacle detection arm

Claims (2)

A cleaning nozzle moving device for a cleaning vehicle in which a cleaning nozzle for cleaning a wall surface is moved up and down relative to a vehicle body,
An elevating mechanism that supports the cleaning nozzle to be movable up and down relative to the vehicle body;
Elevating and moving means for moving the elevating mechanism up and down;
A rear tube provided in the lifting mechanism ;
A low-pressure cleaning nozzle provided in the rear tube;
A front tube movably supported reciprocation member to the vehicle body outside direction with respect to the lifting mechanism,
A high-pressure washing nozzle provided in the front tube;
A cleaning nozzle moving device for a cleaning vehicle, comprising : a forward / backward moving means for moving the front side tube forward / backward so as to move the high pressure cleaning nozzle forward / backward with respect to the lifting mechanism . In the cleaning nozzle moving device of the cleaning vehicle according to claim 1,
As the advancing / retreating means, a fluid pressure cylinder is applied, and when the front tube moves forward to the outside of the vehicle body, the fluid is returned to the tank. Is equipped with a stop valve that seals the return of fluid to the tank so as to prohibit unnecessary movement of the front tube to the outside of the vehicle body. apparatus.

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