JP4989531B2 - High pressure washing car - Google Patents

Description

  The present invention relates to a high-pressure washing vehicle.

  Conventionally, high-pressure washing vehicles have been used for washing sewage pipes and the like. Usually, the high-pressure washing vehicle includes a tank for storing the washing water, a pump for feeding the washing water, a hose for guiding the fed washing water to the injection device, and a hose reel around which the hose is wound. At the time of work, the worker cleans the object to be cleaned by feeding the hose from the hose reel and spraying high-pressure cleaning water from the spray device onto the object to be cleaned such as a sewer pipe.

  This type of high-pressure washing vehicle is equipped with a plurality of different types of injection devices, and any one of the plurality of injection devices can be selectively used according to the degree of dirt and purpose of the object to be cleaned. (For example, refer patent document 1).

  For example, the high-pressure washing car described in Patent Document 1 includes first and second injection devices. The first injection device is attached to the first hose, and the first hose is wound around the first hose reel. The second injection device is attached to the second hose, and the second hose is wound around the second hose reel.

Incidentally, the high-pressure washing vehicle disclosed in Patent Document 1 includes a hydraulic device that rotationally drives only one hose reel, for example, the first hose reel. In the high-pressure washing vehicle, when the hydraulic device is driven, the first hose to which the first injection device is attached is automatically wound or fed out. On the other hand, such a hydraulic device is not provided in the other hose reel, for example, the second hose reel. Therefore, the 2nd hose to which the 2nd injection device was attached was supposed to wind up or pay out by rotating the 2nd hose reel manually.
Utility Model Registration No. 2510670

  By the way, from the viewpoint of reducing the burden on the worker, it is desirable to automate not only the feeding or winding of any one hose, but also the feeding or winding operation of each hose.

  However, if only a plurality of hydraulic devices are provided for automating the feeding or winding of each hose, it is necessary to provide a plurality of operation panels for operating the hydraulic devices and the like. Become. Further, for example, when switching from the first injection device to the second injection device, it is troublesome to move between the respective operation panels.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a high-pressure washing vehicle having a plurality of injection devices, which is a large-scale device for automating the feeding and winding operations of each injection device. It is to carry out without using and to facilitate the operation.

  A high-pressure washing vehicle according to the present invention includes a first injection device and a second injection device for injecting cleaning water, a first hose having a first injection device attached to a tip, and guiding the cleaning water to the first injection device, A second hose with a second injection device attached to the tip, for guiding cleaning water to the second injection device, a first hose reel around which the first hose is wound, and a second hose reel around which the second hose is wound And a hydraulic device that rotationally drives the first hose reel or the second hose reel, wherein the hydraulic device includes an oil reservoir in which hydraulic oil is stored and one end of the oil reservoir. A supply path connected to the oil reservoir, a recovery path having one end connected to the oil reservoir, a hydraulic pump provided in the middle of the supply path, for pumping hydraulic oil in the oil reservoir, and the supply And a direction switching device to which the other end of the recovery path is connected, a first flow path and a second flow path whose one ends are respectively connected to the direction switching device, and the first flow path and the second flow path. A flow path switching device with the other end connected, a first hydraulic flow path with one end and the other end connected to the flow path switching device, and a second hydraulic pressure with one end and the other end connected to the flow path switching device A first hydraulic motor provided in the middle of the flow path, the first hydraulic flow path for rotating the first hose reel, and a second hydraulic hose reel provided in the middle of the second hydraulic flow path. A second hydraulic motor that rotationally drives the first flow path, and the flow path switching device communicates at least the first flow path and the second flow path via the first hydraulic flow path. A state, the first flow path and the second flow path via the second hydraulic flow path. The direction switching device can be switched to a second state to be communicated, and the direction switching device communicates the supply path with the first flow path and communicates the recovery path with the second flow path. A second on-state in which the supply path and the second flow path are communicated with each other and the recovery path and the first flow path are in communication with each other, and a cut-off state in which the supply path and the recovery path are in communication with each other. And can be switched between.

  In the high-pressure washing vehicle, when the flow path switching device is switched to the first state, the first flow path and the second flow path are communicated via the first hydraulic flow path. Therefore, hydraulic oil is supplied from the oil reservoir to the first hydraulic flow path, and the first hydraulic motor provided in the first hydraulic flow path is rotationally driven. On the other hand, when the flow path switching device is switched to the second state, the first flow path and the second flow path are communicated via the second hydraulic flow path. Then, hydraulic oil is supplied from the oil reservoir to the second hydraulic flow path, and the second hydraulic motor provided in the second hydraulic flow path is rotationally driven.

  As described above, the high pressure washing vehicle includes the flow path switching device, so that the hydraulic oil is supplied from the oil reservoir to the first hydraulic motor, and the hydraulic oil is supplied from the oil reservoir to the second hydraulic motor. It becomes possible to share the parts between the oil reservoir and the flow path switching device. Therefore, in a high-pressure washing vehicle having a plurality of injection devices, it is possible to automate the feeding or winding operation of the hose of each injection device without using a large-scale device.

  In the high pressure washing vehicle, a direction switching device is provided between the flow path switching device and the oil reservoir to change the flow direction of the hydraulic oil flowing through the first flow passage and the second flow passage. Therefore, the direction switching device can be shared between a path for supplying hydraulic oil from the oil reservoir to the first hydraulic motor and a path for supplying hydraulic oil from the oil reservoir to the second hydraulic motor. As a result, in the high-pressure washing vehicle, even if the injection device to be used is changed, it is possible to switch the feeding or winding of the hose using the same direction switching device without moving. Therefore, according to the high-pressure washing vehicle, it is possible to automate the operation of feeding or winding the hoses of both injection devices and to facilitate the operation thereof.

  The high-pressure washing vehicle includes an operation lever connected to the direction switching device, and the direction switching device has the first on state, the second on state, and the cut-off according to the position of the operation lever. It is preferable to switch to the state.

  In the high-pressure washing vehicle, the rotation direction of the first hydraulic motor or the second hydraulic motor can be switched by operating the operation lever. Therefore, according to the high-pressure washing vehicle, the first hose or the second hose can be fed out and wound up by the position operation of one operation lever. Therefore, according to the high-pressure washing vehicle, it is possible to facilitate the operation relating to the feeding or winding operation of each hose (first hose, second hose).

  When the direction switching device switches to the first on state, the direction switching device switches the supply path and the first flow path to communicate with each other, and when switched to the second on state, the supply path and the A second communication path that communicates with the second flow path, a first flow rate control mechanism that controls the flow rate of hydraulic fluid that flows in the first communication path, and a flow rate of hydraulic fluid that flows in the second communication path A second flow rate control mechanism, wherein the first flow rate control mechanism changes an opening area of the first communication path according to a position of the operation lever, and the second flow rate control mechanism includes the operation lever. It is preferable to change the opening area of the second communication path in accordance with the position of the second communication path.

  According to the direction switching device, the flow rate of the hydraulic fluid flowing from the supply path to the first flow path and the second flow path can be changed only by changing the position of the operation lever by the first flow rate control mechanism or the second flow rate control mechanism. It becomes possible to control. Therefore, by operating the operation lever, not only the rotation direction of the first hydraulic motor and the second hydraulic motor but also the rotation speed can be changed. That is, by operating the operation lever, not only the switching of the feeding or winding of the hoses (first hose and second hose) of both the jetting devices (first jetting device and second jetting device) but also feeding or winding up. It is possible to adjust the speed. Therefore, according to the high pressure washing vehicle, the feeding or winding operation can be facilitated. This also makes it possible to perform the operation smoothly. Therefore, the work time can be shortened.

  The first injection device is a self-propelled injection device that advances forward by injecting cleaning water backward or obliquely backward, and the first hose state of the direction switching device is the first hose. The first hydraulic motor is rotationally driven in a direction in which the first hose is fed out from a reel, and the direction switching device switches between the supply path and the first flow path when switched to the first on state. When the communication path on the forward path to be communicated is switched to the first on state, the hydraulic fluid that flows in the communication path on the return path that communicates the second flow path and the recovery path and the communication path on the forward path side And a return-side throttle mechanism that suppresses the flow rate of the hydraulic fluid that flows in the communication path on the return path side.

  In the self-propelled injection device, when the jetting power of the washing water is large, the forward moving speed may become a rapid speed. Therefore, the hose may be suddenly drawn from the hose reel. However, according to the high pressure washing vehicle, the throttle mechanism is provided in the communication path on the forward path side and the return path side of the direction switching device. Therefore, the oil flowing through the first hydraulic passage or the second hydraulic passage is squeezed twice in the direction switching device. That is, the flow of oil is restricted in both the outward communication path toward the first hydraulic flow path or the second hydraulic flow path and the return communication path from the first hydraulic flow path or the second hydraulic flow path. It will be squeezed by the mechanism. Therefore, when the oil flow in the hydraulic device is doubled, the sudden rotation of the hydraulic motor is braked, and the hose is prevented from being suddenly drawn out from the hose reel.

  A switch for switching the flow path switching device to at least the first state and the second state is connected to the flow path switching device, and the operation lever and the switch are connected to the same operation panel. It is preferable that it is installed.

  Here, the same operation panel includes not only a single operation panel but also two or more members separated from each other in a form in which the operator can operate without moving. Suppose that

  In the high-pressure washing vehicle, the switch for switching the rotationally driven hydraulic pump to the first hydraulic motor or the second hydraulic motor and the operation lever for operating the feeding or winding of each hose (first hose, second hose) are the same. It is installed on the operation panel. Therefore, even when the first hose reel is rotationally driven and when the second hose reel is rotationally driven, the operation can be performed on the same operation panel without moving. Therefore, according to the high pressure washing vehicle, it is possible to facilitate the feeding or winding operation of each hose (first hose, second hose).

  The high-pressure washing vehicle includes a turntable installed so as to be swingable about a vertical axis, and the first hose reel, the second hose reel, and the operation panel are installed on the turntable. Is preferred.

  According to the high pressure washing vehicle, when automating the feeding or winding operation of the first hose and the second hose, the first hose reel and the second hose reel share a part of the hydraulic device, thereby Increase in size can be suppressed. Further, the feeding or winding operation of the first hose and the second hose can be performed using the same operation panel. As a result, the first hose reel, the second hose reel, and the operation panel can be placed on one turntable. Therefore, according to the high-pressure washing vehicle, the first hose reel, the second hose reel, and the operation panel can be arranged in a compact manner.

  As described above, according to the present invention, in a high-pressure washing vehicle having a plurality of injection devices, the hose feeding and winding operations of each injection device can be automated without using a large-scale device, and the operation thereof Can be facilitated.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

<Embodiment 1>
1 and 2 show a high-pressure washing vehicle 1 according to this embodiment. The high pressure washing vehicle 1 is for washing an object to be washed such as a sewage pipe or a manhole by injecting high pressure washing water from a washing nozzle 33 (see FIG. 3) or a washing gun 35 (see FIG. 3) described later. It is.

  As shown in FIG. 1, the high-pressure washing vehicle 1 includes a cab 2 and a chassis 3. In the chassis 3, a traveling engine 46 (see FIG. 3), a power transmission device (not shown), and the like are assembled. In addition, wheels 5 are attached to the chassis 3.

  On the chassis 3, a tank 11 for storing cleaning water and a pump storage chamber 21 are installed. The tank 11 is installed at the center in the front-rear direction on the chassis 3. The pump storage chamber 21 is installed on the front side of the tank 11. A pump 12 for pumping the cleaning water in the tank 11 is accommodated in the pump storage chamber 21.

  A support base 4 is installed on the rear side of the tank 11 on the chassis 3. As shown in FIGS. 1 and 2, a turntable 6 is provided on the support base 4 so as to be rotatable around a vertical axis. On the turntable 6, a hose reel 15, a sub hose reel 16 and an operation panel 50 are installed.

  The hose reel 15 is attached to the turntable 6 via a frame 31. The hose reel 15 is supported by the frame 31 so as to be rotatable forward and backward about the horizontal axis X1. As shown in FIG. 3, a hose 13 that guides cleaning water is wound around the hose reel 15. A cleaning nozzle 33 is detachably attached to the tip of the hose 13.

  As shown in FIGS. 1 and 2, the sub hose reel 16 is attached to the turntable 6 via a frame 32. The sub hose reel 16 is supported by the frame 32 so as to be rotatable forward and backward about the horizontal axis X2. As shown in FIG. 3, a sub hose 14 that guides cleaning water is wound around the sub hose reel 16. A cleaning gun 35 is detachably attached to the tip of the sub hose 14.

  Further, the high pressure washing vehicle 1 includes a hydraulic device 8 (see FIG. 4) described later. The hose reel 15 is driven to rotate forward and backward by a hydraulic motor 51 (see FIG. 4) of the hydraulic device 8. As a result, the hose 13 is unwound from the hose reel 15 or taken up. On the other hand, the sub hose reel 16 is driven to rotate forward and backward by a hydraulic motor 52 (see FIG. 4) of the hydraulic device 8. As a result, the sub hose 14 is unwound from the sub hose reel 16 or taken up.

  As shown in FIG. 1, the operation panel 50 includes an operation lever 17 and a changeover switch 18. As will be described later, the operation lever 17 operates to feed or take up the hose 13 or the sub hose 14 (see FIG. 3) by rotating the hose reel 15 or the sub hose reel 16 forward and backward. The operation lever 17 is connected to a direction switching valve 56 (see FIG. 4) described later. The changeover switch 18 is a switch for changing the hose reel (the hose reel 15 or the sub hose reel 16) operated by the operation lever 17. The changeover switch 18 is connected to a flow path switching valve 59 (see FIG. 4) described later.

  The above is the configuration of the high-pressure washing vehicle 1 according to the present embodiment. Next, the water circuit of the high-pressure washing vehicle 1 according to the present embodiment will be described with reference to FIG. The water circuit is a circuit that supplies cleaning water from the tank 11 to the cleaning nozzle 33 or the cleaning gun 35.

<< Water circuit of high pressure washing car 1 >>
As shown in FIG. 3, one end of a pipe 61 is connected to the bottom of the tank 11 of the high-pressure washing vehicle 1. The other end of the pipe 61 is connected to the pump 12. The pipe 61 is provided with an on-off valve 80 and a strainer 62 in order from the upstream side to the downstream side.

  A pipe 74 is connected to a midway portion of the pipe 61 downstream of the on-off valve 80 and upstream of the strainer 62. An opening / closing valve 79 is provided at the end of the pipe 74. The piping 74 is for discharging the cleaning water remaining in the tank 11 to the outside after the cleaning is completed.

  One end of a pipe 63 is connected to the discharge side of the pump 12. The pump 12 sucks the cleaning water stored in the tank 11 through the pipe 61 and discharges it to the pipe 63 as high-pressure cleaning water.

  The pump 12 is connected to the traveling engine 46 described above via a pulley 42, a V belt 43, a drive shaft 44, and a PTO (power take-off device) 45. As a result, the pump 12 is driven by the traveling engine 46. The drive shaft 44 is connected to a hydraulic pump 41 of a hydraulic device 8 (see FIG. 4) described later via a power transmission mechanism 47.

  The other end of the pipe 63 is connected to the pressure control valve 64. One end of a pipe 65 is connected to the pressure control valve 64. Further, the pressure control valve 64 is connected to the tank 11 via a pipe 71. The pressure control valve 64 mainly guides the cleaning water in the pipe 63 to the pipe 65, but guides a part of the cleaning water to the pipe 71 when the pressure of the flowing cleaning water is higher than a predetermined set pressure. In this way, the pressure of the cleaning water led to the pipe 65 is controlled by the pressure control valve 64 so as to be equal to or lower than a predetermined set pressure.

  The other end of the pipe 65 is connected to the manifold 70. One end of the pipe 66 is connected to the middle part of the pipe 65. An open / close valve 67 is provided at the other end of the pipe 66.

  One end of a pipe 72 and a pipe 75 is connected to the manifold 70. The manifold 70 is provided with a pressure gauge 77.

  The hose reel 15 is connected to the other end of the pipe 72. An opening / closing valve 73 is provided on one end side of the pipe 72. As described above, the hose 13 is wound around the hose reel 15. A cleaning nozzle 33 is detachably attached to the tip of the hose 13. With such a configuration, the cleaning water flowing into the manifold 70 is guided to the pipe 72. Then, by opening the on-off valve 73, the cleaning water is jetted from the cleaning nozzle 33 through the hose reel 15 and the hose 13.

  A sub hose reel 16 is connected to the other end of the pipe 75. An opening / closing valve 76 is provided in the middle of the pipe 75. As described above, the sub hose 14 is wound around the sub hose reel 16. A cleaning gun 35 is detachably attached to the tip of the sub hose 14. With such a configuration, the cleaning water flowing into the manifold 70 is guided to the pipe 75. Then, by opening the on-off valve 76, the cleaning water is jetted from the cleaning gun 35 via the sub hose reel 16 and the sub hose 14.

  The above is the description of the water circuit. Next, the hydraulic device 8 that drives the hose reel 15 and the sub hose reel 16 to rotate forward and reverse will be described with reference to FIG.

-Hydraulic device 8-
As shown in FIG. 4, the hydraulic device 8 includes an oil reservoir 53 that stores hydraulic oil, a hydraulic pump 41 that pumps hydraulic oil in the oil reservoir 53, a direction switching valve 56, and a flow path switching valve 59. The hydraulic motors 51 and 52 are provided.

  One end of a supply pipe 54 and a recovery pipe 55 is connected to the oil reservoir 53. The other ends of the supply pipe 54 and the recovery pipe 55 are connected to the direction switching valve 56. In addition, one end of a first flow pipe 57 and a second flow pipe 58 is connected to the direction switching valve 56.

  The direction switching valve 56 is configured to be switchable between a first on state, a second on state, and a off state. Specifically, the direction switching valve 56 includes a first communication path 83 that allows the supply pipe 54 and the first flow pipe 57 to communicate with each other when switched to the first on state (see FIGS. 5 and 8). . Further, the direction switching valve 56 includes a second communication passage 84 that allows the supply pipe 54 and the second flow pipe 58 to communicate with each other when switched to the second on state (see FIGS. 6 and 9). Further, when the direction switching valve 56 is switched to the cut-off state, the supply pipe 54 and the recovery pipe 55 are communicated, and the communication between the supply pipe 54 and the first flow pipe 57 or the second flow pipe 58 is released, The communication between the collection pipe 55 and the first flow pipe 57 or the second flow pipe 58 is released.

  The direction switching valve 56 includes a flow rate control mechanism 83a. The flow rate control mechanism 83 a can control the flow rate of the hydraulic oil flowing in the first communication passage 83. The flow control mechanism 83a is configured to change the opening area of the first communication path 83 in accordance with the inclination angle of the operation lever 17 described above. Furthermore, the direction switching valve 56 can control the flow rate of the hydraulic oil flowing in the second communication passage 84 by the flow rate control mechanism 83a.

  With such a configuration, when the direction switching valve 56 is switched, the direction of the hydraulic oil flowing through the first flow pipe 57 and the second flow pipe 58 is changed. Thereby, the rotation direction of hydraulic motors 51 and 52, which will be described later, is changed. Further, by using the operation lever 17, the flow rate of the hydraulic oil flowing into the first circulation pipe 57 or the second circulation pipe 58 changes according to the position of the operation lever 17. As a result, the rotational speeds of hydraulic motors 51 and 52 to be described later, that is, the feeding speed and winding speed of the hose 13 by the hose reel 15 are changed.

  The other ends of the first flow pipe 57 and the second flow pipe 58 are connected to a flow path switching valve 59.

  The flow path switching valve 59 includes first to sixth ports a to f. The other end of the first flow pipe 57 is connected to the first port a, and the other end of the second flow pipe 58 is connected to the second port b. One end of a hydraulic pipe 81 is connected to the third port c, and one end of a hydraulic pipe 82 is connected to the fourth port d. Further, the other end of the hydraulic pipe 81 is connected to the fifth port e, and the other end of the hydraulic pipe 82 is connected to the sixth port f.

  The flow path switching valve 59 is configured by an electromagnetic valve in this embodiment. The flow path switching valve 59 is connected to the above-described switch 18 and is switched between the ON state and the OFF state by the switch 18. Specifically, when the lever 18a of the changeover switch 18 is turned to the left, it is turned off (see FIGS. 4, 5, and 6), and when it is turned to the right, it is turned on (see FIGS. 7, 8, and 9). .

  When the flow path switching valve 59 is in an OFF state (non-energized state), the first port a and the third port c communicate with each other, and the second port b and the fifth port e communicate with each other (FIGS. 4, 5, and 5). 6). As a result, the first flow pipe 57 and the second flow pipe 58 communicate with each other via the hydraulic pipe 81. On the other hand, when the flow path switching valve 59 is in the ON state (energized state), the first port a and the fourth port d communicate with each other, and the second port b and the sixth port f communicate with each other (FIG. 7, FIG. (See 8, 9). As a result, the first flow pipe 57 and the second flow pipe 58 communicate with each other via the hydraulic pipe 82.

  A hydraulic motor 51 is provided in the middle of the hydraulic pipe 81. On the other hand, a hydraulic motor 52 is provided in the middle of the hydraulic pipe 82. The hydraulic motor 51 is rotationally driven by hydraulic oil flowing through the hydraulic pipe 81. On the other hand, the hydraulic motor 52 is rotationally driven by hydraulic oil flowing through the hydraulic pipe 82. The hydraulic motor 51 is connected to the hose reel 15 via a connector 51a, and the hydraulic motor 52 is connected to the sub hose reel 16 via a connector 52a. Thereby, the hose reel 15 is rotationally driven by the hydraulic motor 51. Further, the sub hose reel 16 is rotationally driven by the hydraulic motor 52.

  With such a configuration, by switching the flow path switching valve 59, the hydraulic pipe (the hydraulic pipe 81 or the hydraulic pipe 82) connecting the first flow pipe 57 and the second flow pipe 58 is switched. Then, the hydraulic motors 51 and 52 that are rotationally driven by the hydraulic oil are switched. Thereby, the hose reel (the hose reel 15 or the sub hose reel 16) to be rotationally driven is changed.

  The above is the configuration of the hydraulic device 8. Next, the operation of the high pressure washing vehicle 1 will be described. The high-pressure washing vehicle 1 can selectively execute a washing nozzle injection operation for injecting washing water from the washing nozzle 33 and a washing gun injection operation for injecting washing water from the washing gun 35. Here, the case where the inside of the sewer pipe 100 (refer FIG. 10) is wash | cleaned is demonstrated as an example.

《Cleaning nozzle injection operation》
-Feeding the hose 13-
First, the work of feeding the hose 13 is performed. When the high-pressure washing vehicle 1 arrives at the site of the cleaning work, the high-pressure washing vehicle 1 stops at a position near the manhole 101 as shown in FIG. Then, the turntable 6 is turned so that the hose reel 15 faces the manhole 101. Thereby, it becomes easy to feed the hose 13 of the hose reel 15 to the sewer pipe 100. When the direction of the hose reel 15 is determined, the turntable 6 is secured and prevented from turning.

  Next, the cleaning nozzle 33 attached to the tip of the hose 13 is disposed in the sewer pipe 100. Specifically, as shown in FIG. 5, the lever 18a of the changeover switch 18 provided on the operation panel 50 is rotated to the left to turn off the flow path switching valve 59. Then, the operation lever 17 provided on the operation panel 50 is tilted rightward in FIG. 5 (downward in FIG. 1). Thereby, the direction switching valve 56 is switched to the first on state, the supply pipe 54 and the first flow pipe 57 are communicated, and the recovery pipe 55 and the second flow pipe 58 are communicated.

  When the hydraulic pump 41 is started in such a state, the hydraulic oil in the oil reservoir 53 flows from the supply pipe 54 into the first flow pipe 57 by the hydraulic pump 41. Then, it flows into the hydraulic pipe 81 from the first flow pipe 57 via the flow path switching valve 59, and flows in the direction of the arrow in the hydraulic pipe 81. As a result, the hydraulic motor 51 is driven to rotate, and the hose reel 15 rotates in the direction in which the hose 13 is drawn out.

  Note that the flow rate of the hydraulic oil flowing into the first flow pipe 57 varies depending on the tilt angle of the operation lever 17. Specifically, the amount of oil flowing through the first communication path 83 increases as the operating lever 17 is tilted to the right. As a result, the speed of the hydraulic oil flowing in the hydraulic pipe 81 is increased, and the rotational speed of the hydraulic motor 51 is increased. Therefore, as the operation lever 17 is tilted to the right, the rotation speed of the hose reel 15 increases and the hose 13 is fed out at a high speed. In this way, the hose 13 is disposed in the sewer pipe 100.

-Wash water jet-
After the hose 13 is arranged in the sewer pipe 100 as described above, the pump 12 is driven to guide the cleaning water in the tank 11 to the cleaning nozzle 33 and inject it. Specifically, when the pump 12 is driven, the cleaning water in the tank 11 is sucked into the pump 12 through the pipe 61. Then, the wash water discharged from the pump 12 passes through the pressure control valve 64 and the pipe 65 and is guided to the manifold 70. Here, when the on-off valve 73 is opened, the cleaning water in the manifold 70 is guided to the hose 13 through the pipe 72 and the hose reel 15. Then, the cleaning water is sprayed from a cleaning nozzle 33 attached to the tip of the hose 13.

  Here, the cleaning nozzle 33 is configured to inject high-pressure cleaning water obliquely rearward from the tip of the hose 13. Therefore, when cleaning water is jetted, a forward driving force is applied to the cleaning nozzle 33 and the hose 13. Further, as described above, the hydraulic motor 51 rotates the hose reel 15 in the direction in which the hose 13 is drawn out. As a result, the cleaning nozzle 33 moves forward in the sewer pipe 100. In this manner, the hose 13 is fed out from the hose reel 15 by the propulsion force generated by the hydraulic motor 51 and the washing water injection during the washing water injection.

-Winding of hose 13-
As described above, the cleaning nozzle 33 moves forward while cleaning the inside of the sewer pipe 100. When the cleaning nozzle 33 reaches a predetermined position, the hydraulic motor 51 is reversely rotated while the cleaning water is being sprayed from the cleaning nozzle 33.

  Specifically, the operation lever 17 provided on the operation panel 50 is tilted leftward in FIG. Thereby, the direction switching valve 56 is switched to the second on state, the supply pipe 54 and the second flow pipe 58 are communicated, and the recovery pipe 55 and the first flow pipe 57 are communicated. When the hydraulic pump 41 is started in such a state, the hydraulic oil in the oil reservoir 53 flows from the supply pipe 54 into the second distribution pipe 58 by the hydraulic pump 41. Then, it flows into the hydraulic pipe 81 from the second flow pipe 58 via the flow path switching valve 59 and flows in the direction of the arrow in the hydraulic pipe 81. As a result, the hydraulic motor 51 rotates in the reverse direction, and the hose reel 15 is rotationally driven in the direction in which the hose 13 is wound up.

  Here, the driving force by the hydraulic motor 51 is greater than the propulsive force applied to the cleaning nozzle 33. Therefore, the hose 13 is forcibly wound around the hose reel 15 against the driving force.

  Note that the flow rate of the hydraulic oil flowing into the second circulation pipe 58 varies depending on the tilt angle of the operation lever 17. Specifically, the amount of oil flowing through the second communication passage 84 increases as the operating lever 17 is tilted leftward. As a result, the speed of the hydraulic oil flowing in the hydraulic pipe 81 is increased, and the rotational speed of the hydraulic motor 51 is increased. Therefore, as the operating lever 17 is tilted leftward, the rotation speed of the hose reel 15 increases and the hose 13 is wound at a high speed.

  In this manner, the cleaning nozzle 33 is moved backward to the vicinity of the manhole 101 while the cleaning water is being sprayed from the cleaning nozzle 33. As a result, sludge and the like in the sewer pipe 100 are swept backward by the high-pressure washing water and collected in the vicinity of the manhole 101.

  Then, after the cleaning nozzle 33 is retracted to the base below the manhole 101, the on-off valve 73 is closed to stop the injection of cleaning water. As a result, the driving force applied to the cleaning nozzle 33 is eliminated. At this time, the position of the operation lever 17 provided on the operation panel 50 is left as it is, and the hydraulic motor 51 is continuously rotated in the reverse direction until the hose 13 is completely wound around the hose reel 15.

  When the winding of the hose 13 is completed as described above, the operation lever 17 is returned to the neutral position (see FIG. 4). Thereby, the direction switching valve 56 is switched to the cut-off state, and the communication state between the supply pipe 54 and the second flow pipe 58 is released. Therefore, hydraulic oil is not supplied to the hydraulic motor 51, and the rotation of the hydraulic motor 51 stops. Accordingly, the rotation of the hose reel 15 is also stopped.

《Cleaning gun injection operation》
-Feeding of the sub hose 14-
First, the sub hose 14 is fed out. As shown in FIG. 7, the lever 18a of the changeover switch 18 provided on the operation panel 50 is rotated to the right to turn the flow path switching valve 59 on. Then, as shown in FIG. 8, the operation lever 17 provided on the operation panel 50 is tilted to the right. Thereby, the direction switching valve 56 is switched to the first on state, the supply pipe 54 and the first flow pipe 57 are communicated, and the recovery pipe 55 and the second flow pipe 58 are communicated.

  When the hydraulic pump 41 is started in such a state, the hydraulic oil in the oil reservoir 53 flows from the supply pipe 54 into the first flow pipe 57 by the hydraulic pump 41. Then, it flows into the hydraulic pipe 82 from the first flow pipe 57 via the flow path switching valve 59 and flows in the direction of the arrow in the hydraulic pipe 82. As a result, the hydraulic motor 52 is driven to rotate, and the sub hose reel 16 rotates in the direction in which the sub hose 14 is drawn out.

  Note that the opening area of the first communication passage 83 increases and the flow rate increases as the operation lever 17 is tilted to the right by the flow rate control mechanism 83a. As a result, the speed of the hydraulic oil flowing in the hydraulic pipe 82 is increased, and the rotational speed of the hydraulic motor 52 is increased. Therefore, as the operating lever 17 is tilted to the right, the rotation speed of the sub hose reel 16 increases and the sub hose 14 is fed out at a high speed.

  As described above, when the sub hose 14 is extended by a necessary length, the operation lever 17 is returned to the neutral position (see FIG. 7). Thereby, the direction switching valve 56 is switched to the cut-off state, and the communication state between the supply pipe 54 and the first flow pipe 57 is released. Therefore, hydraulic oil is no longer supplied to the hydraulic motor 52, and the rotation of the hydraulic motor 52 stops. Accordingly, the rotation of the sub hose reel 16 is also stopped.

-Wash water jet-
Then, the pump 12 in the water circuit is started, and the cleaning water in the tank 11 is guided to the cleaning gun 35 and sprayed. Specifically, the cleaning water in the tank 11 is sucked into the pump 12 through the pipe 61. Then, the wash water discharged from the pump 12 passes through the pressure control valve 64 and the pipe 65 and is guided to the manifold 70. Here, when the on-off valve 76 is opened, the cleaning water in the manifold 70 is guided to the sub hose 14 via the pipe 75 and the sub hose reel 16. Then, the cleaning water is sprayed from a cleaning gun 35 attached to the tip of the sub hose 14.

-Winding of the sub hose 14-
After the cleaning is completed, the sub hose 14 is wound up. The lever 18a of the changeover switch 18 provided on the operation panel 50 is kept rotated to the right, and the flow path switching valve 59 is kept in the ON state. Then, as shown in FIG. 9, the operation lever 17 provided on the operation panel 50 is tilted leftward. Thereby, the direction switching valve 56 is switched to the second on state, the supply pipe 54 and the second flow pipe 58 are communicated, and the recovery pipe 55 and the first flow pipe 57 are communicated.

  When the hydraulic pump 41 is started in such a state, the hydraulic oil in the oil reservoir 53 flows from the supply pipe 54 into the second distribution pipe 58 by the hydraulic pump 41. Then, it flows into the hydraulic pipe 82 from the second flow pipe 58 via the flow path switching valve 59 and flows in the direction of the arrow through the hydraulic pipe 82. As a result, the hydraulic motor 52 is driven to rotate, and the sub hose reel 16 rotates in the direction in which the sub hose 14 is wound up.

  In addition, the opening area of the 2nd communicating path 84 increases, and the flow volume increases, so that the control lever 17 is tilted leftward by the flow control mechanism 83a. As a result, the speed of the hydraulic oil flowing in the hydraulic pipe 82 is increased, and the rotational speed of the hydraulic motor 52 is increased. Therefore, as the operation lever 17 is tilted leftward, the rotation speed of the sub hose reel 16 increases and the sub hose 14 is wound at a high speed.

  When the winding of the sub hose 14 is completed as described above, the operation lever 17 is returned to the neutral position (see FIG. 7). Thereby, the direction switching valve 56 is switched to the cut-off state, and the communication state between the supply pipe 54 and the second flow pipe 58 is released. Therefore, hydraulic oil is no longer supplied to the hydraulic motor 52, and the rotation of the hydraulic motor 52 stops. Accordingly, the rotation of the sub hose reel 16 is also stopped.

  As described above, the high-pressure washing vehicle 1 includes the flow path switching valve 59 that allows the first flow pipe 57 and the second flow pipe 58 to communicate with either the hydraulic pipe 81 or the hydraulic pipe 82. Thus, the parts provided between the oil reservoir 53 and the flow path switching valve 59 are shared between the path for supplying the hydraulic oil to the hydraulic motor 51 and the path for supplying the hydraulic oil to the hydraulic motor 52. Can be made. Therefore, in the high-pressure washing vehicle 1 having a plurality of injection devices (in this embodiment, the cleaning nozzle 33 and the cleaning gun 35), the hose of each injection device (the cleaning nozzle 33, the cleaning gun 35) is used without using a large-scale device. The feeding or winding operation of the (hose 13 and sub hose 14) can be automated.

  Further, in the high pressure washing vehicle 1, a direction switching valve 56 is provided between the flow path switching valve 59 and the oil reservoir 53 to change the flow direction of the hydraulic oil flowing through the first flow pipe 57 and the second flow pipe 58. It has been. Therefore, the direction switching valve 56 can be shared between a path for supplying hydraulic oil from the oil reservoir 53 to the hydraulic motor 51 and a path for supplying hydraulic oil from the oil reservoir 53 to the hydraulic motor 52. As a result, in the high-pressure washing vehicle 1, even if the injection device (washing nozzle 33, washing gun 35) to be used is changed, the same direction switching valve 56 is used for the hose (hose 13, sub hose 14). Can be switched between feeding and winding. Therefore, according to the high pressure washing vehicle 1, the feeding or winding operation of the hose (hose 13, sub hose 14) of each injection device (washing nozzle 33, washing gun 35) is automated and the operation is facilitated. be able to.

  In the high pressure washing vehicle 1, the rotation direction of the hydraulic motor 51 or the hydraulic motor 52 can be switched by operating the operation lever 17. Therefore, according to the high pressure washing vehicle 1, the feeding operation and the winding operation of the hose 13 or the sub hose 14 can be performed by the position operation of one operation lever 17. Therefore, according to the high pressure washing vehicle 1, it is possible to facilitate the operation relating to the feeding or winding operation of each hose (the hose 13 and the sub hose 14).

  According to the main direction switching valve 56, the flow rate of the hydraulic oil flowing from the supply pipe 54 to the first flow pipe 57 and the second flow pipe 58 is controlled only by changing the position of the operation lever 17 by the flow rate control mechanism 83a. It becomes possible. Therefore, by operating the operation lever 17, not only the rotation direction of the hydraulic motor 51 and the hydraulic motor 52 but also the rotation speed can be changed. That is, by operating the operation lever 17, not only the switching of the feeding or winding of the hose (hose 13, sub hose 14) of each spraying device (cleaning nozzle 33, cleaning gun 35), but also the speed of feeding or winding. It becomes possible to adjust. Therefore, according to the high pressure washing vehicle 1, the feeding or winding operation can be facilitated. This also makes it possible to perform the operation smoothly. Therefore, the work time can be shortened.

  In the high-pressure washing vehicle 1, the changeover switch 18 that switches the hydraulic motor to be rotated to the hydraulic motor 51 or the hydraulic motor 52 and the operation lever 17 that operates the feeding or winding of each hose (the hose 13 and the sub hose 14) are the same. It is installed on the operation panel 50. Therefore, even when the hose reel 15 is rotationally driven and when the sub hose reel 16 is rotationally driven, the same operation panel 50 can be used for operation. Therefore, according to the high pressure washing vehicle 1, it is possible to facilitate the feeding or winding operation of each hose (the hose 13 and the sub hose 14).

  According to the high pressure washing vehicle 1, when automating the feeding or winding operation of the hose 13 and the sub hose 14, the hose reel 15 and the sub hose reel 16 share a part of the hydraulic device 8, thereby An increase in size can be suppressed. Further, the feeding or winding operation of the hose 13 and the sub hose 14 can be performed using the same operation panel 50. Thereby, the hose reel 15 and the sub hose reel 16 can be placed on one turntable 6. Therefore, according to the high pressure washing vehicle 1, the hose reel 15, the sub hose reel 16, and the operation panel 50 can be arranged in a compact manner.

  In the present embodiment, the operation lever 17 is operated by being tilted from the neutral position. However, the operation lever 17 is not limited to this, and may be one that slides in a direction substantially orthogonal to the operation lever 17, for example. Further, in the present embodiment, as the changeover switch 18, a switch that turns on / off the electromagnetic valve that is the flow path switching valve 59 by swinging the lever 18a is used. However, the changeover switch 18 is not limited to this, and for example, a simple push button type switch may be used.

  In the present embodiment, the flow rate control mechanism 83 a is configured to change the opening area of the first communication path 83 or the second communication path 84 in accordance with the inclination angle of the operation lever 17. However, when the operation lever 17 is not operated by being tilted but is operated by being moved, for example, the flow control mechanism 83a is not in accordance with the inclination angle of the operation lever 17 but according to the position. Thus, the opening area of the first communication path 83 or the second communication path 84 may be changed.

  Furthermore, although the flow path switching valve 59 has been described as an electromagnetic valve in the present embodiment, the flow path switching valve 59 may be a manual valve and connected to the changeover switch 18 by a link mechanism or the like. Even in such a case, the same effects as those described above can be obtained.

  In the present embodiment, the direction switching valve 56 is used as the direction switching device, but any device that switches the flow direction of the hydraulic oil in the first flow pipe 37 and the second flow pipe 58 may be used.

  In the present embodiment, the cleaning nozzle 33 and the cleaning gun 35 are used as the cleaning water injection device. However, the injection device is not limited to these, and other injection devices may be used. For example, instead of the cleaning gun 35, another cleaning nozzle smaller than the cleaning nozzle 33 (so-called small nozzle) may be used. By using such a small nozzle, it becomes easy to clean the small-diameter sewage pipe. Further, the number of injection devices is not limited to two, and three or more injection devices may be provided. In this case, as many hydraulic motors and hydraulic pipes as the number of injection devices are provided. The flow path switching device is configured to be switchable to each state in which the first flow pipe 57 and the second flow pipe 58 communicate with each other through each hydraulic pipe. As a result, the same effect as described above can be obtained.

  In the above embodiment, the flow rate control mechanism 83a is a so-called variable throttle mechanism that can adjust the opening area of the communication path. However, the flow control mechanism 83a may be a so-called fixed throttle mechanism in which the opening area of the communication path cannot be adjusted.

<Embodiment 2>
As shown in FIG. 4, in the first embodiment, the direction switching valve 56 includes a first communication path 83 that connects the supply path 54 and the first flow path 57 in the first on state, A second communication path 84 that allows the supply path 54 and the second flow path 58 to communicate with each other when in a state, and a third communication path 85 that allows the second flow path 58 and the recovery path 55 to communicate with each other when in a first on state. And a fourth communication path 86 that allows the first flow path 57 and the recovery path 55 to communicate with each other in the second input state, and the flow rate control mechanism 83a with respect to the first communication path 83 and the second communication path 84. Was provided.

  In the first on state, the first communication path 83 becomes the forward path toward the hydraulic pipe 81, and the third communication path 85 becomes the return path from the hydraulic pipe 81, but the flow rate control mechanism 83a, which is a kind of the throttle mechanism, It was provided only in the first communication path 83 which is the outward path.

  By the way, as described above, the cleaning nozzle 33 moves forward in the manhole 101 by spraying cleaning water backward or obliquely backward. However, when the jetting force of the cleaning nozzle 33 is large, the cleaning nozzle 33 moves forward at a rapid speed, and the hose 13 may be suddenly drawn out from the hose reel 15. In the present embodiment, the rapid extension of the hose 13 is suppressed.

  In the following description, the same reference numerals are given to the same parts as those in the first embodiment, and the descriptions thereof are omitted.

  As shown in FIG. 11, the high-pressure washing vehicle according to the second embodiment has both a forward path from the hydraulic pipes 81 and 82 and a return path from the hydraulic pipes 81 and 82 in the direction switching valve 56 when the hose 13 is extended. An aperture mechanism is provided. Specifically, in the second embodiment, the forward side throttle mechanism 91 is provided for the first communication path 83 and the second communication path 84 (outward side communication path) of the direction switching valve 65, and the third communication path 85. In addition, a return-side throttle mechanism 92 is provided for the fourth communication passage 86 (return-side communication passage). The configuration of the diaphragm mechanisms 91 and 92 is not particularly limited. These diaphragm mechanisms 91 and 92 may be fixed diaphragm mechanisms or variable diaphragm mechanisms. In the present embodiment, the diaphragm mechanisms 91 and 92 are formed by variable diaphragm mechanisms.

  According to the present embodiment, when the direction switching valve 56 is in the first on state, the oil flowing through the hydraulic pipe 81 is throttled both in the forward path and the return path. That is, when the direction switching valve 56 is in the first on state, the oil flowing through the hydraulic pipe 81 is throttled by the forward path side throttle mechanism 91 and the return path side throttle mechanism 92 and is throttled twice. Therefore, the flow rate of oil in the hydraulic pipe 81 is suppressed, and rapid rotation of the hydraulic motor 51 is suppressed. As a result, since the feeding of the hose 13 from the hose reel 15 is braked by the hydraulic motor 51, even if the injection force of the cleaning nozzle 33 is large, it is possible to prevent the hose 13 from being drawn out suddenly. .

"Definition of terms"
The same operation panel according to the present invention includes not only a group of operation panels 50 as in the present embodiment, but also two or more members separated in form that are within a range where the operator can operate without moving. Also included.

  As described above, the present invention is useful for a high-pressure washing vehicle.

It is a side view of a high-pressure washing vehicle. It is a rear view of a high-pressure washing car. It is a figure which shows a water circuit. It is a figure which shows the hydraulic device at the time of a hose reel stop. It is a figure which shows the flow of the hydraulic oil in the case of extending | stretching a hose. It is a figure which shows the flow of the hydraulic oil in the case of winding up a hose. It is a figure which shows the hydraulic device at the time of a sub hose reel stop. It is a figure which shows the flow of the hydraulic fluid in the case of paying out a sub hose. It is a figure which shows the flow of the hydraulic fluid in the case of winding up a sub hose. It is a figure explaining the condition of use of a high-pressure washing car. FIG. 5 is a diagram illustrating a hydraulic apparatus according to a second embodiment.

Explanation of symbols

1 High-pressure washing car 6 Turntable 8 Hydraulic device 13 Hose (first hose)
14 Sub hose (second hose)
15 Hose reel (first hose reel)
16 Sub hose reel (second hose reel)
17 Control lever 18 Changeover switch (switch)
33 Cleaning nozzle (first injection device)
35 Cleaning gun (second injection device)
50 Operation panel 51 Hydraulic motor (first hydraulic motor)
52 Hydraulic motor (second hydraulic motor)
53 Oil reservoir 54 Supply pipe (supply path)
55 Recovery pipe (recovery path)
56 Directional switching valve (Directional switching device)
57 First distribution pipe (first flow passage)
58 Second distribution pipe (second flow passage)
59 Channel switching device 81 Hydraulic piping (first hydraulic channel)
82 Hydraulic piping (second hydraulic flow path)
83 1st communication path 83a Flow control mechanism (1st flow control mechanism, 2nd flow control mechanism)
84 Second communication path 91 Outward side throttle mechanism 92 Return path side throttle mechanism

Claims (6)

A first injection device and a second injection device that inject cleaning water, a first injection device attached to the tip, a first hose that guides cleaning water to the first injection device, and a second injection device attached to the tip , A second hose for introducing cleaning water to the second injection device, a first hose reel around which the first hose is wound, a second hose reel around which the second hose is wound, and the first hose reel or the first hose reel. A high-pressure washing vehicle including a hydraulic device that rotationally drives a two-hose reel,
The hydraulic device is
An oil reservoir in which hydraulic oil is stored;
A supply path having one end connected to the oil reservoir;
A collection path having one end connected to the oil reservoir;
A hydraulic pump that is provided in the middle of the supply path and pumps hydraulic oil in the oil reservoir;
A direction switching device to which the other end of the supply path and the recovery path is connected;
A first flow path and a second flow path, each having one end connected to the direction switching device;
A flow path switching device to which the other ends of the first flow path and the second flow path are connected;
A first hydraulic flow path having one end and the other end connected to the flow path switching device;
A second hydraulic flow path having one end and the other end connected to the flow path switching device;
A first hydraulic motor provided in the middle of the first hydraulic flow path to drive the first hose reel;
A second hydraulic motor that is provided in the middle of the second hydraulic flow path and rotationally drives the second hose reel;
The flow path switching device includes at least a first state in which the first flow path and the second flow path are communicated with each other via the first hydraulic flow path, and the first flow path and the second flow path. Can be switched to a second state in which communication is established via the second hydraulic flow path,
The direction switching device includes a first input state that allows the supply path and the first flow path to communicate with each other and allows the recovery path and the second flow path to communicate with each other; and the supply path and the second flow path. The high-pressure washing vehicle can be switched between a second on state in which the recovery path and the first flow path are in communication with each other and a disconnected state in which the supply path and the recovery path are in communication with each other. The high-pressure washing vehicle according to claim 1,
An operation lever connected to the direction switching device;
The direction switching device is a high-pressure washing vehicle that is switched between the first on state, the second on state, and the off state according to the position of the operation lever. The high-pressure washing vehicle according to claim 2,
The direction switching device is
When switched to the first on state, a first communication path that connects the supply path and the first flow path;
When switched to the second on state, a second communication path that connects the supply path and the second flow path;
A first flow rate control mechanism for controlling the flow rate of hydraulic fluid flowing in the first communication path;
A second flow rate control mechanism for controlling the flow rate of the hydraulic oil flowing in the second communication path,
The first flow rate control mechanism changes an opening area of the first communication path according to a position of the operation lever,
The second flow rate control mechanism is a high-pressure washing vehicle that changes an opening area of the second communication path according to a position of the operation lever. The high-pressure washing vehicle according to claim 2,
The first injection device is a self-propelled injection device that advances forward by injecting washing water backward or obliquely backward,
The first on state of the direction switching device is a state in which the first hydraulic motor is driven to rotate in a direction in which the first hose is fed out from the first hose reel.
The direction switching device is
When switched to the first on state, a communication path on the forward path side that connects the supply path and the first flow path;
When switched to the first on-state, a return-side communication path that connects the second flow path and the recovery path;
A forward-side throttle mechanism that suppresses the flow rate of hydraulic fluid flowing in the forward-side communication passage;
A return-side throttle mechanism that suppresses the flow rate of hydraulic fluid flowing in the return-path side communication passage;
Equipped with high pressure washing car. The high-pressure washing vehicle according to any one of claims 2 to 4,
The flow path switching device is connected to a switch for switching the flow path switching device between at least the first state and the second state,
The operation lever and the switch are high-pressure washing vehicles installed on the same operation panel. The high-pressure washing vehicle according to claim 5,
It has a turntable installed so that it can swing around the vertical axis.
The first hose reel, the second hose reel, and the operation panel are high-pressure washing vehicles installed on the turntable.

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