JP7228505B2 - Compaction vehicle - Google Patents

Description

The present invention relates to rolling compaction vehicles.

This type of rolling compaction vehicle compacts pavement materials such as gravel and asphalt on the roadbed or roadbed while traveling on front and rear compaction wheels that also serve as running wheels provided at the front and rear of the vehicle body. Carry out hardening work. During the compaction work, water may be sprayed on the front and rear roller wheels for the purpose of preventing adhesion of pavement material. For this purpose, water nozzles are provided in the vicinity of the front and rear roller wheels, respectively, and the water in the water tank is supplied to each nozzle by a water spray pump to spray the corresponding roller wheels.

Such a watering pump includes a filter that filters water, a solenoid valve that closes when the watering pump is stopped to prevent water from dripping from the watering nozzle, a switching valve that executes and stops watering to the rear roller wheel, etc. Together, they form a control unit, and are installed in a machine room with an opening formed on the outer surface of the vehicle body. For example, in the vibrating roller described in Patent Document 1, as shown in FIGS. 1, 2 and 4, a machine room 21 is opened on the left side of the rear vehicle body 5, and a control unit 20 is installed inside. The left side plate of the rear vehicle body 5 protrudes slightly upward from the bottom plate in the machine room 21, and the upper edge thereof is used as a step 30 for getting on and off the driver's seat 9.

The step 30 is located at an intermediate height between the ground surface and the floor plate 31 of the driver's seat 9. For example, when getting on the driver's seat 9 from the ground surface, the operator puts one foot on the step 30 and then The user stands on the step 30 using a grip or the like provided on the vehicle body 5 as a clue. Next, put the other foot on the floor board 31 and move the body onto the floor board 31 to sit on the driver's seat 9 . When getting off the train, the procedure is reversed.

JP 2017-57596 A

However, the rolling compactor vehicle of Patent Document 1 has room for further improvement in terms of getting on and off using the step 30 as described above.

As shown in FIG. 2 of Patent Document 1, a discharge port provided in the front portion (left side in the drawing) of the water sprinkler pump 16 is connected to the inlet of the filter 17 via a hose 15, and water is drained from the discharge port. A drain valve 18c for is suspended. As shown in FIG. 4, the discharge port of the water pump 16 projects leftward from the main body of the water pump 16, in other words, toward the opening of the machine chamber 21. Inevitably, the discharge port and the drain valve 18c is also located closer to the opening of the machine room 21 than the main body of the water sprinkler pump 16 .

In order to put one's feet on the step 30 when getting on and off the driver's seat 9, a space for inserting one's feet into the machine room 21 through the opening is required. However, the toe interferes with the discharge port and the drain valve 18c arranged as described above, and the foot cannot be fully inserted into the machine chamber 21. FIG. For this reason, the operator has to put a small portion of the toe on the step 30 when getting on and off the vehicle, which places a heavy burden on the foot.
In addition, it is possible to expand the depth of the machine room in order to secure a space to insert the legs, but in this case, the space adjacent to the machine room will be reduced and other problems will occur. It was hard to say that it was a realistic countermeasure.

The present invention has been made to solve such problems, and its object is to provide a water sprinkler control unit installed at the opening of the machine room without increasing the depth of the machine room. To provide a rolling compactor vehicle capable of improving the ease of getting in and out of a driver's seat using provided steps.

In order to achieve the above object, the rolling compactor vehicle of the present invention defines a machine room on the side of the vehicle body, and arranges a side plate below the opening of the machine room so as to protrude upward from the floor plate, The upper edge of the side plate is used as a step for getting on and off the driver's seat, and a sprinkler pump for discharging water supplied from at least a sprinkler tank through a first pipe from a discharge port, and a second pipe from the sprinkler pump. a filter that filters water supplied through the water nozzle and is fixed on a unit base and installed in the machine room as a control unit, wherein the discharge port of the water spray pump It is provided at one end of a main body of the pump and has a shape protruding from the main body toward the opening side of the machine room, and the water sprinkler pump extends one end of the main body further into the machine room than the other end in plan view. As the water nozzles, a first water nozzle for spraying water on a first rolling wheel made of a metal drum, and a second water nozzle for spraying water on a second rolling wheel made of a rubber tire. 2 water spray nozzles are provided, the outlet of the filter is connected to the inlet of the first valve through a third pipe, and one outlet of the first valve is connected to the first valve through a fourth pipe. and the other outlet of the first valve is connected to the second water nozzle through a fifth pipe, and when the first valve is closed, the first and the second 2 watering nozzles are blocked from the side of the watering pump, a second valve is interposed in the fifth pipe, and water is supplied from the watering pump to the second watering nozzle when the second valve is closed. water is blocked, the connection state between the water spray tank and the water pump via the first pipe, the connection state between the water spray pump and the filter via the second pipe, the third A connection state between the filter and the first valve via a pipe, a connection state between the first valve and the first spray nozzle via the fourth pipe, and a connection state between the first water spray nozzle and the fifth pipe The state of connection between the first valve and the second valve, and the state of connection between the second valve and the second water nozzle via the fifth pipe, are detected from the opening of the machine room. It is characterized by being visible .

According to the roller compaction vehicle of the present invention, it is possible to improve the ease of getting on and off the driver's seat by using the step provided at the opening of the machine room without increasing the depth of the machine room in which the control unit of the sprinkler device is installed. can do.

It is a side view which shows the vibrating roller of embodiment. FIG. 2 is a detailed view of part A in FIG. 1 showing the control unit viewed from the opening side of the machine room; FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2, as seen from the front of the inside of the machine room; FIG. 3 is a cross-sectional view taken along line IV-IV in FIG. 2, looking inside the machine room from above; FIG. 3 is a cross-sectional view taken along line V-V in FIG. 2 , looking inside the machine room from below;

An embodiment in which the present invention is embodied in a vibrating roller will be described below.
FIG. 1 is a side view showing the vibrating roller of this embodiment, and FIG. 2 is a detailed view of part A in FIG. 1 showing the control unit viewed from the opening side of the machine room.
The vehicle body of the vibrating roller 1 (hereinafter also referred to as a vehicle) includes a front vehicle body 3 having a front roller wheel 2 (first roller wheel) and a rear roller wheel 4 (second roller wheel). and a rear vehicle body 5 provided with wheels). The front vehicle body 3 and the rear vehicle body 5 are connected via an articulate mechanism 6 that can bend in the horizontal direction, and the vehicle 1 turns by bending each other. The front rolling wheel 2 is composed of a metal drum having a length corresponding to the width of the vehicle, and the rear rolling wheel 4 is composed of a total of four rubber tires.

An operation console 8 having a steering wheel 7 is installed on the front side of the rear body 5, and a driver's seat 9 is installed behind the operation console 8. - 特許庁A worker seated in the driver's seat 9 operates the steering wheel 7 and the forward/reverse levers 10 on both sides of the operation table, and according to the operation, the HST (Hydro Static Transmission) driven by the engine mounted in the front vehicle body 3 is operated. ) is used as a power source to run and turn the vibrating roller 1 .

A front watering nozzle 12 (first watering nozzle) is arranged near the front rolling wheel 2, and a rear watering nozzle 13 (second watering nozzle) is arranged near the rear rolling wheel 4. It is Each of the water spray nozzles 12 and 13 is connected to a water spray tank 14 installed on the rear vehicle body 5 via pipes 15a to 15e (hoses). 18e are provided. These devices 16, 17, 18a to 18e are fixed to a unit base 19 made of sheet metal (hereinafter, this assembly state is referred to as a control unit 20), and placed in a machine room 21 defined below the driver's seat 9. attached to the The sprinkler apparatus of this embodiment is composed of the control unit 20, the front and rear sprinkler nozzles 12 and 13, the sprinkler tank 14, etc., and the details thereof will be described below.

3 is a cross-sectional view along the line III-III in FIG. 2 as seen from the front of the inside of the machine room 21, FIG. 4 is a cross-sectional view along the line IV-IV in FIG. FIG. 3 is a cross-sectional view taken along line VV of FIG. 2 when the interior of the chamber 21 is viewed from below;
First, the configuration of the machine room 21 will be described.
A machine room 21 is defined on the left side surface of the rear vehicle body 5 . Specifically, as shown in FIG. 2, the machine room 21 is formed between a bottom plate 23 corresponding to the bottom surface of the rear vehicle body 5 and a floor plate 24 corresponding to the foot of the driver's seat 9 in the vertical direction. It is formed between a front plate 25 corresponding to the front surface of the rear vehicle body 5 and a rear plate 26 that partitions the rear rolling wheels 4 . In the left-right direction, the machine room 21 is partitioned by a back plate 27 with respect to the articulate mechanism 6 in the center of the vehicle body, and has an approximately rectangular opening on the left side. As shown in FIGS. 2 and 3, a left side plate 28 forming the left side surface of the rear vehicle body 5 is disposed below the opening 21a of the machine room 21. The left side plate 28 protrudes upward from the bottom plate, An upper edge extending in the front-rear direction is used as a step 28 a for getting on and off the driver's seat 9 .

Next, the configuration of the unit base 19 will be described.
The unit base 19 is manufactured by bending a steel plate. As a whole, the unit base 19 includes a mounting surface 19a mounted on the back plate 27 of the machine room 21, an upper horizontal surface 19b extending from the top of the mounting surface 19a toward the opening 21a of the machine room 21, A lower horizontal surface 19c extending toward the opening 21a of the machine room 21, a front vertical surface 19d in which the front portion of the upper horizontal surface 19b is bent downward at a right angle, and a rear portion of the upper horizontal surface 19b upward. It consists of a rear vertical surface 19e facing fore and aft that is bent at right angles. The unit base 19 is arranged in the machine room 21, and as shown in FIGS.

Next, functions of the devices 16, 17, 18a to 18e fixed as the control unit 20 on the unit base 19 configured in this way will be described.
The water spray pump 16 is configured as a centrifugal pump and serves to discharge water supplied from the water spray tank 14 to supply the front and rear water spray nozzles 12,13. The filter 17 serves to filter dust and the like contained in the water discharged from the sprinkler pump 16 . As the valves 18a-18e, a solenoid valve 18a (first valve), a switching valve 18b (second valve), and drain valves 18c-18e are provided in this embodiment.

The solenoid valve 18a opens when the water pump 16 is operating to allow water to be supplied from the water pump 16 to the water nozzles 12 and 13, and closes when the water pump 16 stops to supply water from the water pump 16. The dripping of water from each of the sprinkler nozzles 12 and 13 is prevented by shutting off the water that is sprayed.

The switching valve 18b plays a role of executing/stopping the supply of water to the rear watering nozzle 13 according to opening/closing of the watering pump 16 when the watering pump 16 is operated. Instead of spraying water, solvent may be sprayed from a solvent spraying nozzle (not shown) to the rear roller wheels 4 made of rubber tires to prevent adhesion of the pavement material.At this time, the switching valve 18b is closed.
The drain valves 18c to 18e are provided at various locations in the control unit 20, and when opened, drain (drain) water from the devices 16, 17, 18a, 18b and the pipes 15a to 15e.

Next, the fixed state of each device 16, 17, 18a to 18e on the unit base 19 will be described in the order of the sprinkler pump 16, the filter 17, the solenoid valve 18a, and the switching valve 18b along the flow of water.
The sprinkler pump 16 is provided with a bracket 16b on the lower side of a cylindrical main body 16a, and the bracket 16b is fixed on the lower horizontal surface 19c by four bolts 31. As shown in FIG. As shown in FIGS. 2 and 5, an L-shaped joint 32 is connected from the front to the front of the main body 16a as a suction port. 1st piping 15a from the water spray tank 14 extended to is connected.

The sprinkler pump 16 is arranged at the lowest position in the control unit 20 in order to secure a height difference with the sprinkler tank 14 which is the supply source of water. Therefore, the water in the water spray tank 14 is always led to the inside of the pump from the L-shaped joint 32 through the first pipe 15a by its own weight, thereby enabling the spiral water spray pump 16 to start.

A T-shaped joint 33 is connected as a discharge port from the left to the front part of the body 16a of the watering pump 16. One connection end 33a of the T-shaped joint 33 points downward, and the other connection end 33b points upward. are doing. By being connected to the main body 16a from the left, the T-shaped joint 33 protrudes leftward from the main body 16a, in other words, toward the opening 21a of the machine room 21, as shown in FIGS. ing. A drain valve 18 c hangs from one connecting end 33 a of the T-shaped joint 33 , and the drain valve 18 c together with the T-shaped joint 33 is positioned closer to the opening 21 a of the machine chamber 21 than the main body 16 a of the water spray pump 16 .

As shown in FIGS. 2, 3 and 4, the filter 17 is arranged on the left side of the front vertical surface 19d of the unit base 19, and the bracket 17a provided on the top thereof is secured to the front vertical surface 19d by a pair of left and right bolts 34. is fixed on the left side of the An L-shaped joint 35 is connected to the upper part of the filter 17 as an inlet from the left side, and a connecting end 35a of the L-shaped joint 35 directed to the rear is connected to a T-shaped joint 33 of the water spray pump 16 through a second pipe 15b. is connected to the connection end 33b of the . An L-shaped joint 36 is connected to the upper portion of the filter 17 as an outlet from above, and its connection end 36a is oriented rearward. During the operation of the sprinkler pump 16, the discharged water is supplied to the filter 17 through the second pipe 15b. be. A drain valve 18 d hangs down from the lower portion of the filter 17 .

As shown in FIGS. 2 and 4, the solenoid valve 18a is fixed to the lower surface of the upper horizontal surface 19b by four nuts 37, and an L-shaped joint 38 is connected to its right side as an inlet from the right side. A connecting end 38a directed forward of the L-shaped joint 38 is connected to the L-shaped joint 36 of the filter 17 via the third pipe 15c. A T-shaped joint 39 is connected as an outlet from the left to the left side of the solenoid valve 18a, and one connection end 39a (one outlet) of the T-shaped joint 39 directed to the rear is connected to a fourth pipe 15d. there is The fourth pipe 15d extends forward on the back side of the back plate 27 through a through hole 27a formed in the back plate 27 of the machine room 21, and is connected to the front spray nozzle 12 (not shown). there is

As shown in FIG. 2, a T-shaped joint 40 is connected to the other forward connecting end 39b (the other outlet) of the T-shaped joint 39 of the solenoid valve 18a. A drain valve 18e hangs from one connection end 40a directed downward of this T-shaped joint 40, and the other connection end 40b directed upward is connected to the rear sprinkling water via an L-shaped joint 41 and a fifth pipe 15e. It is connected with the nozzle 13 .

One side of an L-shaped bracket 43 is fixed to the rear vertical surface 19e of the unit base 19 by a pair of left and right bolts 42, and the switching valve 18b is fixed to the other side of the bracket 43 by a pair of left and right nuts 44. The switching valve 18b is located directly under the floor plate 24 and is installed on the fifth pipe 15e, and can be opened and closed from the driver's seat 9 side through an operation hole 24a penetrating the floor plate 24. ing.

The solenoid valve 18a is opened while the sprinkler pump 16 is operating, and the water filtered by the filter 17 flows through the solenoid valve 18a through the third pipe 15c. Then, the water after circulation is supplied to the front sprinkler nozzle 12 through the fourth pipe 15d and is sprayed, and if the switching valve 18b is open at this time, the water flows through the fifth pipe 15e. It is supplied to the rear watering nozzle 13 and watered. Further, when the switching valve 18b is closed, the water supplied from the water pump 16 to the rear water nozzle 13 is cut off, so the water spray from the rear water nozzle 13 is stopped. When the water pump 16 stops, the solenoid valve 18a closes, and the front and rear water nozzles 12 and 13 are blocked from the water pump 16 side to prevent dripping of water.

By the way, in the roller compactor vehicle of Patent Document 1, there is room for improvement in getting on and off using the steps because the toe interferes with the discharge port of the sprinkler pump and the drain valve. . The reason for this is that the discharge port of the sprinkler pump protrudes toward the opening of the machine room. to explain.

First, as indicated by the two-dot chain lines in FIGS. 3 and 4, the operator's foot F, which is placed on the step 28a, is placed at substantially the same vertical position and front-rear position with respect to the T-shaped joint 33 of the water spray pump 16 and the drain valve 18c. It is difficult to change these positional relationships. That is, in order to secure a height difference with the watering tank 14, it is desirable to dispose the watering pump 16 at the lowest position in the control unit 20. As a result, the T-shaped joint 33 and the drain valve 18c are located above the step 28a. It almost coincides with the vertical position of the operator's foot F placed on the .
A T-shaped joint 33 is provided in front of the water pump 16 near the filter 17 for connection to the filter 17 disposed in front of the water pump 16 via the second pipe 15b. On the other hand, since it is easy for the operator to put his/her foot F on the step 28a near the center in the front-rear direction, the T-shaped joint 33 and the drain valve 18c are placed in front of and behind the operator's foot F put on the step 28a. Almost match the position.

Therefore, in this embodiment, the positions of the T-shaped joint 33 and the drain valve 18c are changed to the back side of the machine room 21 to secure space. The sprinkler pump 16 is obliquely arranged. Specifically, the front portion (one end) of the sprinkler pump 16 provided with the T-shaped joint 33 and the drain valve 18c is positioned to the right of the rear portion (the other end), in other words, the back side of the machine room 21 (opposite side of the opening 21a). The sprinkler pump 16 is obliquely arranged so as to be positioned at , and an angle α is formed between its axis C and the step. As a result, without increasing the depth of the machine room 21, the operator can fully insert his foot F into the machine room 21 as indicated by the two-dot chain line in FIG. can be greatly improved.

On the other hand, as described above, the watering tank 14, the watering pump 16, the filter 17, the solenoid valve 18a and the switching valve 18b are connected to each other via the pipes 15a to 15e. Then, the positional relationship of each device 16, 17, 18a, 18b constituting the control unit 20, or each device 16, using L-shaped joints 32, 35, 36, 38, 41 and T-shaped joints 33, 39, 40 By optimizing the drawing direction of each pipe 15a to 15e from 17, 18a, 18b, the left side of the control unit 20, in other words, the part corresponding to the opening 21a side of the machine room 21 of the control unit 20 , the pipes 15a to 15e are routed. As a result, the state of connection of the devices 16, 17, 18a, and 18b including the water spray tank 14 via the pipes 15a to 15e can be easily visually recognized from the opening 21a of the machine room 21. there is

Specifically, as shown in FIG. 2, the state of connection between the watering tank 14 and the L-shaped joint 32 of the watering pump 16 via the first pipe 15a, and the T-shaped joint 32 of the watering pump 16 via the second pipe 15b. The state of connection between the joint 33 and the L-shaped joint 35 of the filter 17, the state of connection between the T-shaped joint 39 of the solenoid valve 18a and the front spray nozzle 12 via the fourth pipe 15d, and the state of connection between the front spray nozzle 12 and the fifth pipe 15e. The state of connection between the T-shaped joint 39 of the solenoid valve 18a and the switching valve 18b, and the state of connection between the switching valve 18b and the rear sprinkler nozzle 13 via the fifth pipe 15e, are almost unobstructed by surrounding members. It can be visually recognized from the opening 21a of the machine room 21, and as a result, each connection state can be easily grasped.

In addition, since the drain valves 18c to 18e are also visible, their positions can be easily grasped when draining water. As for the connection state between the L-shaped joint 36 of the filter 17 and the L-shaped joint 38 of the solenoid valve 18a through the third pipe 15c, most of it is blocked by the T-shaped joint 40 or the like. can be visually recognized from the opening 21a, the connection state can be grasped.

If the water sprinkler does not function properly while the vibrating roller 1 is in use, there is a possibility that one of the devices 16, 17, 18a to 18e of the control unit 20 is malfunctioning. For example, when the filter 17 is clogged, the internal element is replaced, and when the sprinkler pump 16 or the solenoid valve 18a becomes inoperable, it is repaired or replaced. At that time, it is necessary not only to remove the target devices 16, 17, 18a to 18e from the unit base 19, but also to disconnect the pipes 15a to 15e from the devices 16, 17, 18a to 18e. can be easily visually recognized, the work can be carried out with great ease, and as a result, the maintainability of the control unit 20 can be greatly improved.

Drain valves 18c to 18e are interposed at various locations of the control unit 20 in order to drain the water in the devices 14, 16, 17, 18a, 18b and the pipes 15a to 15e for freezing prevention. there is As one of them, conventionally, a drain valve is interposed on the third pipe 15c connecting the solenoid valve 18a and the filter 17, for example, in order to drain water from the solenoid valve 18a. However, in the present embodiment, as shown in FIG. 2, the filter 17 is arranged below the solenoid valve 18a, so that when the drain valve 18d below the filter 17 is opened, only within the filter 17 Water in the solenoid valve 18a is also discharged through the third pipe 15c. As a result, the drain valve at this position can be omitted, which not only reduces the cost of the sprinkler system, but also simplifies draining work and further improves maintainability.

On the other hand, at the time of production of the water sprinkler, equipment such as the water sprinkler pump 16, the filter 17 and the valves 18a to 18e are fixed to the unit base 19 in advance and assembled as the control unit 20. It is attached to plate 27 by bolts 30 . In this embodiment, as shown in FIG. 2, a wide space is formed around the left and right bolts 30 on the mounting surface 19a of the unit base 19 by arranging the sprinkler pump 16 and the solenoid valve 18a apart in the vertical direction. ing. Therefore, when installing the control unit 20 in the machine room 21, the bolts 30 can be easily tightened using a tool, thereby improving the productivity of the sprinkler system.

Although the description of the embodiment is finished above, the aspect of the present invention is not limited to this embodiment. For example, in the above-described embodiment, the vibrating roller 1 has a metal drum as the front rolling wheel 2 and a rubber tire as the rear rolling wheel 4. However, if the rolling machine is equipped with a sprinkler device, the type of roller can be as follows. is not limited to For example, it may be applied to vibrating rollers in which both the front and rear rollers are metal drums, or may be applied to Macadam rollers and tire rollers.

In the above embodiment, the control unit 20 is provided with the solenoid valve 18a and the switching valve 18b. .
Further, in the above embodiment, the drain valve 18c is provided at the T-shaped joint 33, which is the discharge port of the water spray pump 16, but this may be omitted. Even in this case, by arranging the sprinkler pump 16 obliquely, it is possible to prevent interference between the operator's foot F and the T-shaped joint 33, thereby improving ease of getting in and out of the vehicle.
Also, in the above embodiment, the T-shaped joint 33 is provided in the front portion of the sprinkler pump 16, but instead of this, it may be provided in the rear portion. In that case, the sprinkler pump 16 may be obliquely arranged so that the rear portion (one end) of the sprinkler pump 16 is positioned deeper in the machine room 21 than the front portion (the other end).

1 Vibration roller (rolling compaction vehicle)
2 front rolling wheel (first rolling wheel)
4 rear rolling wheel (second rolling wheel)
5 rear body (body)
12 front water nozzle (first water nozzle)
13 rear water nozzle (second water nozzle)
14 Watering tank 15a First pipe 15b Second pipe 15c Third pipe 15d Fourth pipe 15e Fifth pipe 16 Watering pump 16a Body 17 Filter 18a Solenoid valve (first valve)
18b switching valve (second valve)
18d drain valve 19 unit base 20 control unit 21 machine room 28 left side plate (side plate)
28a Step 33 T-joint (outlet of sprinkler pump)
38 L-shaped joint (inlet of the first valve)
39 T-joint (outlet of first valve)
39a one connection end (one outlet of the first valve)
39b other connection end (other outlet of the first valve)

Claims (2)

A step in which a machine room is defined on the side of the vehicle body, a side plate is arranged at the lower part of the opening of the machine room so as to protrude upward from the floor plate, and the upper edge of the side plate is used for getting in and out of the driver's seat. a sprinkler pump for discharging at least water supplied from a sprinkler tank through a first pipe through a discharge port; and water supplied from the sprinkler pump through a second pipe, filtered and supplied to a sprinkler nozzle In a rolling compactor vehicle in which a filter is fixed on a unit base and installed in the machine room as a control unit,
The discharge port of the water pump is provided at one end of the main body of the water pump and has a shape projecting from the main body toward the opening side of the machine room,
The sprinkler pump is obliquely arranged so that one end of the main body is positioned further to the back side of the machine room than the other end in plan view ,
As the water spray nozzles, a first water spray nozzle for spraying water on a first rolling wheel made of a metal drum and a second water spray nozzle for spraying water on a second rolling wheel made of a rubber tire are provided,
The outlet of the filter is connected to the inlet of the first valve through a third pipe, and one outlet of the first valve is connected to the first spray nozzle through a fourth pipe. , the other outlet of the first valve is connected to the second water nozzle through a fifth pipe, and when the first valve is closed, the first and second water nozzles are connected to the water pump blocked from the side,
A second valve is interposed in the fifth pipe, and water supplied from the water pump to the second water nozzle is cut off when the second valve is closed,
The state of connection between the water spray tank and the water pump via the first pipe, the state of connection between the water pump and the filter via the second pipe, and the filter via the third pipe. A state of connection with the first valve, a state of connection between the first valve and the first spray nozzle via the fourth pipe, a state of connection between the first valve and the first water nozzle via the fifth pipe 2, and the connection state between the second valve and the second water spray nozzle via the fifth pipe are visible from the opening of the machine room. A compaction vehicle characterized by The outlet of the filter is connected to the inlet of the first valve through a third pipe, the outlet of the first valve is connected to the water spray nozzle, and the water spray nozzle is turned off when the first valve is closed. cut off from the sprinkler pump side,
2. A roller compactor vehicle according to claim 1, wherein said filter is provided with a drain valve at its lower portion and is arranged at a position lower than said first valve.

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