JP5459981B2 - Road maintenance vehicle - Google Patents

Description

  The present invention relates to a road maintenance vehicle in which a vehicle used as an antifreezing agent spray vehicle in winter can be used as a water supply vehicle or a watering vehicle in summer.

  Conventionally, as road maintenance vehicles used in winter, there are sprinklers that spray antifreezing agents on roads, and there are sprinklers that spray water on roads as vehicles used in summer, etc. Water trucks used during disasters are also widely known.

  For example, as described in Patent Document 1, the antifreezing agent spraying vehicle has an antifreezing agent storage hopper installed in the spraying vehicle main body and an antifreezing agent supplied from the antifreezing agent storage hopper in the rear. A transporting means for sending out and a spraying device for spraying the antifreezing agent sent out from the transporting means; and in the case of spraying the wet antifreezing agent, freezing of dry salt or the like sprayed by mounting a solution tank The solution is sprayed onto the road surface by spraying the solution in the solution tank onto the inhibitor, and this anti-freeze spray vehicle is used during the snowfall season. When it is over, there is a problem that the vehicle is not used and the vehicle is in a closed state.

  On the other hand, as a watering vehicle for watering roads and trees in summer, for example, as described in Patent Document 2, a watering tank is installed on the vehicle body, and water in this watering tank is sprayed onto the road surface by a watering pipe. The water sprayer is not used during snowfall or during road freezing, but is stored in the motor pool, etc. There is a problem that the operation rate is bad as well.

  In order to solve such problems, for example, a road maintenance and repair vehicle as described in Patent Document 3 has been developed. That is, this road maintenance / repair vehicle is prepared in advance with various road maintenance / repair devices such as a watering device, an antifreezing agent spraying device, a high-pressure washing device, a lift device, and a snow removal device. Is configured to be used in a vehicle.

JP 2000-27139 A JP-A-11-350443 JP 2005-206059 A

  However, according to such a road maintenance / repair vehicle, instead of using the existing antifreezing agent spray vehicle, all road maintenance / repair devices including the vehicle must be newly manufactured. In addition to being extremely expensive and uneconomical, when a device for carrying out a desired road maintenance repair is mounted on a vehicle, all the road maintenance repair devices previously installed and installed are removed from the vehicle. Since the road maintenance and reinforcement device to be used next must be mounted and installed after the removal, there is a problem that the work is extremely complicated and requires a lot of labor and labor.

  The present invention has been made in view of such problems, and the object of the present invention is to spray, maintain, and supply water to this road maintenance vehicle without changing the structure of the road maintenance vehicle composed of the antifreezing agent spraying vehicle. An object of the present invention is to provide a road maintenance vehicle that can be easily used as a vehicle according to the purpose of use such as washing.

In order to achieve the above object, a road maintenance vehicle according to the present invention includes, as described in claim 1, an antifreezing agent storage hopper installed in a spray vehicle main body and an antifreezing agent supplied from the antifreezing agent storage hopper. In a road maintenance vehicle comprising an antifreeze spraying vehicle equipped with a transporting means for feeding the rearward and a spraying device for spraying the antifreeze sent out from the transporting means , a pipe connection is made to the bottom of the antifreeze containing hopper A water container provided with a mouth is detachably installed and a sprinkling pipe is connected to the pipe connection port of the water container.

In the road maintenance vehicle configured as described above, the invention according to claim 2 is configured such that the water container mounting table is detachably attached to the conveyor cover that is horizontally installed in the front-rear direction at the center portion in the antifreezing agent-containing hopper. The water container is installed on the water container mounting table, and the pipe connection port provided at the bottom of the water container faces the lower end opening of the antifreezing agent containing hopper. The invention according to No. 3 is characterized in that a water supply pipe is connected in place of the sprinkling pipe connected to the pipe connection port provided at the bottom of the water container.

According to a fourth aspect of the present invention, a water spray pipe having a water spray nozzle provided at the tip is disposed on the lower surface of the rear end portion of the spray truck main body, and the water spray pipe is installed in a solution tank mounted on the spray truck main body. It is connected via a solution pump, and a watering wheel is configured by connecting a watering pipe connected to a pipe connection port at the bottom of a water container installed in an antifreezing agent containing hopper to the watering pipe. The invention according to claim 5 is characterized in that the solution pump is connected to a water spray pipe and a spray pipe having a water spray nozzle disposed on the antifreezing agent spraying disk via a switching valve. .

In the invention according to claim 4 or claim 5, the invention according to claim 6 is such that a branch pipe is connected to a water spray pipe between the solution tank and the solution pump, and a high-pressure pump is connected to the pipe of the branch pipe. And a high-pressure water injection nozzle is attached to the tip of the branch pipe. The invention according to claim 7 is characterized in that the solution pump is connected to the water spray pipe and the antifreezing agent spray disk via the switching valve. It is characterized by being connected to a spray pipe having a water spray nozzle disposed above and a water feed pipe having a stirring nozzle for stirring the inside of the water container at the tip.

According to an eighth aspect of the present invention, the water container according to any one of the first to fourth aspects is formed in a bag shape that can be folded with a thick waterproof cloth, and a water inlet is connected to the top wall of the water container and a pipe is connected to the bottom. A mouth is provided.

According to the first aspect of the present invention, in a road maintenance vehicle comprising an antifreezing agent spraying vehicle, a water container having a pipe connection port at the bottom in the antifreezing agent containing hopper installed in the main body of the spraying vehicle is detachable. Since the water sprinkling pipe is connected to the above-mentioned pipe connection port of this water container, the anti-freezing agent is put into the anti-freezing agent containing hopper and the anti-freezing agent is put on the road as usual in the snowing season in winter. Can be used as a sprayer for spraying, and in summer, use this antifreeze sprayer as it is and effectively use the wide internal space for the water container installation space without removing the antifreeze containing hopper In addition, since the lower end of the antifreezing agent containing hopper opens toward the antifreezing agent transporting device disposed below, the antifreezing agent containing hopper is utilized by utilizing the lower end opening. You can easily connect the watering pipe to the pipe connecting port which is provided at the bottom of the installed water container, to be able to effectively utilize the existing antifreeze agent diffusing vehicle as it water truck and water truck, full year The operating time can be increased and the maintenance cost can be reduced.

According to the second aspect of the present invention, the water container mounting table is detachably supported by the conveyor cover that is horizontally installed in the front-rear direction at the center portion in the antifreezing agent storage hopper, and the water container mounting table is mounted on the water container mounting table. a water container placed, because to face the pipe connecting port which is provided at the bottom of the water container to the lower end opening of the antifreeze agent storage hopper, water conveyor cover provided for the antifreeze agent storage hopper Used as a container support member, the water container can be easily and reliably installed in the antifreeze agent hopper, and the pipe connection port provided at the bottom of the water container is connected to the lower end opening of the antifreeze agent hopper. By connecting the water supply pipe to the pipe connection port through the lower end opening of the antifreezing agent-containing hopper as described in claim 3 without using a pump or the like. With faucet from inside the container Can be used as a water truck that can be easily water supply while natural flow of water to the water supply tube such as a tube.

Moreover, according to the invention which concerns on Claim 4, the water spray pipe which provided the spray nozzle at the front-end | tip with the anti-freezing agent spraying apparatus is arrange | positioned in the rear-end part of the anti-freezing agent spray vehicle. In order to wet the antifreeze agent, it is connected via a solution pump to the solution tank mounted on the spray car body. Just by installing the water container and the sprinkling pipe connected to the solution tank by the sprinkling pipe, the sprinkling car can be configured easily and the sprinkling car together with the water in the water container. The solution tank mounted on the main body can also be used as a water tank, and a large amount of water can be sprinkled.

Moreover, according to the invention according to claim 5, since the solution pump is connected to the water spray pipe and the spray pipe having the water spray nozzle disposed on the antifreezing agent spray disk via the switching valve, When used as a watering wheel, the solution pump can be connected to the watering pipe side to supply water in the solution tank to the watering pipe. By switching the solution pump to the water spray nozzle side, water is sprayed onto the antifreeze agent in the dry state falling on the spray disc from the antifreeze agent storage hopper via the conveying means, and the wet antifreeze agent is added. It can be used as a wet antifreeze spraying vehicle that is sprayed on the road while making.

According to the invention of claim 6, the branch pipe is connected to the water spray pipe between the solution tank and the solution pump, the high pressure pump is interposed in the pipe of the branch pipe, and the tip of the branch pipe Since the high-pressure water injection nozzle is attached to the water, the water in the water container or the solution tank can be ejected from the injection nozzle as washing water for the vehicle body or the road surface using the water spray pipe.

Furthermore, in the invention according to claim 5, according to the invention according to claim 7, a spray having a solution pump having a water spray nozzle and a water spray nozzle disposed on a freezing agent spray disk via a switching valve. Since the pipe is connected to a water pipe equipped with a stirring nozzle that stirs the inside of the water container at the tip, a water container is installed in the antifreezing agent-containing hopper even during the snowing season, and the water container is salted. If the above-mentioned switching valve is switched to the water pipe side, the water in the solution tank is sprayed into the water container by the solution pump, and the anti-freezing agent in the water container is stirred and mixed. The snow melting liquid can be easily prepared by making the snow melting liquid after the snow melting liquid is created. It can be sprayed smoothly That.

Moreover, according to the invention which concerns on Claim 8 as said water container, since it consists of a thick waterproof cloth and forms in the shape of a foldable bag, of course, it can provide at low cost and can be folded compactly when not in use. It can be stored and stored, so the maintenance and management of the water container can be performed efficiently, and unlike the plastic or metal container, it is lightweight and folded. Sometimes a single worker can easily perform the installation work in the freezing agent storage hopper, and further, a water injection port is provided on the top wall surface and a pipe connection port is provided at the bottom. By injecting water into the water container from the water injection port with the side closed, a water container that has expanded along the internal shape of the cryogen storage hopper can be easily obtained, and is stable in the cryogen storage hopper. It is possible to be installed in the state.

  Next, a specific embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a simplified side view of a road maintenance vehicle composed of a wet antifreeze spraying vehicle. An antifreeze storage hopper installed and installed on the chassis of the car body 1, the lower half of both side walls are formed in a funnel shape that gradually narrows toward the lower end, and the bottom is made of antifreeze. It is formed in an opening 2a that drops and discharges downward, and is provided with conveying means 3 including a belt conveyor or the like that conveys the antifreezing agent discharged from the opening 2a to the rear along the opening 2a. ing.

  Further, a spraying device 4 for the antifreezing agent sent out from the conveying means 3 is arranged at the lower rear end of the spraying vehicle main body 1, and a cylindrical shape that receives the antifreezing agent from the conveying means 3 so as to surround the spraying device 4. The chute 5 is provided. As is well known, the spreading device 4 is integrally formed with a spreading disc 4c protruding downward from the chute 5 at the lower end of a vertical rotating shaft 4b rotated by a motor 4a.

  Further, a hydraulic tank 6 and a hydraulic pump 7 for operating various devices of the antifreezing agent spraying vehicle are installed on the front of the chassis of the spraying vehicle main body 1 and both sides of the antifreezing agent containing hopper 2 are installed. A plurality of solution tanks 8 containing water for wetting dry antifreeze agent or a solution prepared by mixing water and a dried salt (antifreeze agent) in advance. Yes. As shown in the piping system diagram of FIG. 2, all these solution tanks 8 are connected to each other by connecting pipes, and one end portion of a water spray pipe 9 is connected to and communicated with one solution tank 8. The other end portion (tip portion) of the water pipe 9 is piped to the lower surface of the rear end portion of the spray vehicle main body 1 and communicated with the watering nozzle 9a attached to the lower surface of the rear end portion.

  A solution pump 10 installed on the chassis of the spray vehicle main body 1 is interposed in the pipe of the sprinkling pipe 9, and a drive motor 10 a of the solution pump 10 is connected to the hydraulic pump 7 via a hydraulic circuit. Are configured to operate. In addition, a switching valve 11 is provided in the water pipe 9 between the solution pump 10 and the spray nozzle 9a. This switching valve 11 is connected to the switching valve 11 with water from the solution tank 8 side supplied by the operation of the solution pump 10, the watering pipe 9 on the watering nozzle 9 a side, the water spray pipe 12, and the water feeding pipe 13. It is configured to be switched and sent to each.

  The water spray nozzle 12a attached to the tip of the water spray pipe 12 is attached to the inner wall surface of the chute 5 above the antifreezing agent spray disc 4b of the spraying device 4, and is in a dry state falling inside the chute 5. The cryoprotectant is wetted by spraying water. The water spray pipe 9 having the water spray nozzle 9a and the water spray pipe 12 having the water spray nozzle 12a are always provided as a part of the structure of the antifreezing agent spraying vehicle together with the solution tank 8 and the solution pump 7. A stirring nozzle 13a provided at the tip 13 stirs the interior of a water container 14 to be described later, and is removed from the switching valve 11 side when not in use.

  The water container 14 is made of a thick waterproof cloth and is formed into a foldable bag shape. When not in use, the water container 14 is compactly folded and configured to be efficiently stored, and when used, As shown in FIG. 6, it is expanded by the pressure of water injected into the inside, and is configured to conform to the internal shape of the cryogen storage hopper 2 as shown in FIGS. That is, in the state where it is installed in the cryogen storage hopper 2, the water container 14 is gradually lowered downward with the lower half portions of the both side wall surfaces at the same inclination angle as the both side wall surfaces of the antifreezing agent storage hopper 2. It forms so that the inclined wall surface which inclines in the direction which becomes narrow may be comprised, and it has comprised so that the outer side surface of this both-side wall surface may contact | abut to the inner side surface of the both-side wall surface of antifreezing agent accommodation hopper 2, and may be received. .

  The top wall surface of the water container 14 is completely sealed, and a short cylindrical flexible water inlet 22 communicating with the water container 14 is mounted at a suitable position on the top wall surface. In addition, a short tube-shaped flexible pipe connection port 15 that communicates with the inside of the water container 14 is provided in a suitable position at the bottom so as to protrude downward. On the other hand, as shown in FIG. 3, a conveyor cover 2b having a mountain-shaped cross section for dispersing the anti-freezing agent put into the anti-freezing agent containing hopper 2 is provided at the center of the anti-freezing agent containing hopper 2 as shown in FIG. As shown in FIGS. 4 and 5, the water container mounting table 17 is installed on the conveyor cover 2b via the support frame 16, and the water container mounting table 17 is filled with water. The pipe connection port 15 provided at the bottom of the container 14 is protruded downward from the mounting table 17 so as to protrude downward from the lower end opening 2a of the antifreezing agent storage hopper 2.

  In use, the water container 14 is installed in the antifreezing agent storage hopper 2 via the support frame 16 and the mounting table 17 and is inflated by injecting water from the water inlet 22 and filling it. It is composed. The support frame 16 is composed of a horizontally long plate formed on an inclined end surface with both side end surfaces received in contact with the inner side surfaces of both side wall surfaces of the anti-freezing agent containing hopper 2, and the above-mentioned support frame 16 is formed at the center in the width direction. A mountain-shaped recess that can be engaged with the conveyor cover 2b is formed.

  In addition, the pipe connection port 15 of the water container 14 is configured to be detachably connected to and communicated with the tip ends of the water supply pipe 18 and the water sprinkling pipe 19 through the lower end opening of the antifreezing agent storage hopper 2. The sprinkling pipe 19 is connected at its base end side to the sprinkling pipe 9 communicating with the solution tank 8.

  Further, the branch pipe 20 is detachably connected to the water spray pipe 9 between the solution tank 8 and the solution pump 10, and the operation of the high-pressure pump 21 interposed in the pipe of the branch pipe 20 causes the branch pipe 20 to be connected. High pressure water is jetted from a high pressure water jet nozzle 20a attached to the tip. 21a is a drive motor for the high-pressure pump 21. The drive motor 21a is connected to the solution pump 7 for driving the conveying means 3, the spraying device 4, the solution pump 7, etc. It is configured to operate. FIG. 2 shows a piping circuit composed of all these pipes. In the case of a dry antifreeze spraying vehicle not provided with the solution tank 8, the water spray pipe 9 is connected to the pipe connection port 15 of the water container 14.

  The usage mode of the road maintenance vehicle composed of the antifreezing agent spraying vehicle configured as described above will be described. In winter, the antifreezing agent spraying vehicle sprays the antifreezing agent on the road surface. When spraying the antifreezing agent put into the agent containing hopper 2 on the road surface, the water container 14 is not installed in the antifreezing agent containing hopper 2, and the solution tank 8 and the water container 14 are connected. The sprinkling pipe 19, the water supply pipe 13, the branch pipe, and the water supply pipe 18 are not connected and the antifreezing agent is sprayed.

  As is well known, this spraying operation is carried out by loading and storing the antifreezing agent such as dried salt in the antifreezing agent containing hopper 2, storing the antifreezing agent containing hopper 2, and traveling to the spraying site. The antifreezing agent conveying means 3 arranged along the line is operated to convey the antifreezing agent to the rear end side of the spray vehicle main body 1 by the conveying means 3 and fall into the chute 5 from the conveying means 3. Let On the other hand, at the time of spraying the antifreezing agent, the switching valve 11 in the pipe is switched to the water spray pipe 12 side, and the solution pump 10 is operated to move the water in the solution tank 8 from the sprinkling pipe 9 to the switching valve 11. Then, the water spray nozzle 12a sprays the chute 5 from the water spray nozzle 12a onto the antifreezing agent that is dropped, and the wet antifreezing agent is sprayed onto the road surface by the spraying disk 4c of the spraying device 4.

  Even in winter, the water container 14 can be disposed in the antifreezing agent-containing hopper 2 and used as a snow melting vehicle. That is, the water container 14 is installed in the antifreezing agent storage hopper 2, the water supply pipe 13 is connected to the switching valve 11, and after the dry antifreezing agent such as salt is stored in the water container 14, the switching valve When 11 is switched to the water pipe 13 side and the solution pump 10 is operated, the water in the solution tank 8 is inserted into the water container 14 from the water spray pipe 9 through the switching valve 11 and the water pipe 13. It is supplied into the water container 14 from the tip stirring nozzle 13a, and water and the antifreezing agent are stirred and mixed in the water container 14 by a jet flow from the stirring nozzle 13a to prepare (create) a snow melting liquid.

  After the preparation of the snowmelt, the pipe connection port 15 of the water container 14 and the water spray pipe 9 are connected and communicated with each other through the water spray pipe 19, and the switching valve 11 is switched to the water spray nozzle 9a side of the water spray pipe 9 so that the solution pump 10 is operated. When activated, the snow melting liquid in the water container 14 can be sprayed from the water spray nozzle 9a through the water spray pipe 9 to the road surface. The watering pipe 19 may be connected to the pipe connection port 15 of the water container 14 before or during the preparation of the snowmelt.

  Next, when the antifreezing agent spraying vehicle is used as a watering vehicle in summer or the like, first, the water container 14 is installed in the antifreezing agent containing hopper 2 as shown in FIG. One end of the water sprinkling pipe 19 is connected to the pipe connection port 15 provided at the bottom through the lower end opening 2a of the antifreezing agent containing hopper 2 and the other end of the water sprinkling pipe 19 is connected to the water sprinkling pipe 9 To. The water container 14 is installed in the antifreezing agent storage hopper 2 by supporting several support frames 16 on the conveyor cover 2b with a predetermined interval in the front-rear direction, and mounting the water container between these support frames 16. After laying the mounting table 17, it is installed on the mounting table 17, and a water injection hose (not shown) is connected to the water injection port 22 to inject and fill the water container 14 with water. The water supply pipe 13 and the branch pipe 20 are not provided.

  After this state, the water container 14 is run with water filled, and the switching valve 11 is switched to communicate with the watering nozzle 9a side of the watering pipe 9 at the spraying place and the solution pump 10 is driven. Water in the water container 14 is sprayed from the sprinkling pipe 19 to the road surface through the sprinkling pipe 9 and the switching valve 11 from the tip sprinkling nozzle 9a of the sprinkling pipe 9 attached to the lower surface of the rear end of the spraying vehicle main body 1. At this time, by storing water in the solution tank 8 communicating with the water spray tube 9, the water in the solution tank 8 can be sprayed from the water spray nozzle 9 a through the water spray tube 9. It should be noted that an opening / closing valve is provided in the pipe line of the watering pipe 9 and the watering pipe 19 so that the communication of the watering pipe 9 and the watering pipe 19 with respect to the solution tank 8 is blocked by this opening / closing valve. Is desirable.

  When the antifreezing agent spraying vehicle having the water container 14 installed in the antifreezing agent containing hopper 2 is used as a vehicle washing or road surface washing vehicle, the solution tank 8 and the solution pump 10 A branch pipe 20 provided with a high-pressure water jet nozzle 20a at the tip is connected to a joint member (not shown) provided in the water spray pipe 9 (see FIG. 9). Further, the drive motor 21a of the high-pressure pump 21 provided in the pipe of the branch pipe 20 is connected to the hydraulic circuit of the hydraulic pump 7 and is operated by the hydraulic pump 7.

  When the high-pressure pump 21 is driven in such a manner that the supply of water to the water spray pipe 9 on the switching valve 11 side is shut off due to the inoperability of the solution pump 10, the water in the water container 14 and the solution tank 8 The water inside is sprayed from the high-pressure water spray nozzle 20a through the branch pipe 20, and the vehicle body and the road surface are cleaned.

  Next, when using the antifreezing agent spraying vehicle having the water container 14 in the antifreezing agent containing hopper 2 as a water supply vehicle, as shown in FIG. After stopping, a water supply pipe 18 is installed on the road surface, etc., and the lower end opening 2a of the antifreezing agent containing hopper 2 is connected to the pipe connection port 15 projecting the base end side of the water supply pipe 18 from the bottom of the water container 14. The water in the water container 14 is allowed to flow naturally into the water supply pipe 18 due to a head difference by opening an on-off valve (not shown) provided in the pipe connection port 15. In the embodiment described above, a waterproof cloth container that is foldable is used as the water container, but the synthetic container has a fixed shape that can be installed in contact with the inclined inner wall surface of the cryogen storage hopper 2. It may be a resin water container or a metal water container.

The side view of an antifreezing agent dispersion vehicle. Piping system diagram. The simplified longitudinal front view of the antifreezing agent accommodation hopper. The simplified longitudinal front view of the state which installed the water container. The longitudinal side view. The perspective view of a water container. The perspective view of the folded state. The side view of the state which installed the water container and used it as a watering vehicle. The side view of the state used as a washing vehicle. The side view of the state used as a water supply vehicle.

Next, when the antifreezing agent spraying vehicle having the water container 14 installed in the antifreezing agent containing hopper 2 is used as a water supply vehicle, as shown in FIG. After stopping, a water supply pipe 18 is installed on the road surface, etc., and the lower end opening 2a of the antifreezing agent containing hopper 2 is connected to the pipe connection port 15 projecting the base end side of the water supply pipe 18 from the bottom of the water container 14. The water in the water container 14 is allowed to flow naturally into the water supply pipe 18 due to a head difference by opening an on-off valve (not shown) provided in the pipe connection port 15. In the embodiment described above, a waterproof cloth container that is foldable is used as the water container, but the synthetic container has a fixed shape that can be installed in contact with the inclined inner wall surface of the cryogen storage hopper 2. It may be a resin water container or a metal water container.

Claims (8)

An anti-freezing agent storage hopper installed in the main body of the spraying vehicle, a conveying means for feeding the anti-freezing agent supplied from the anti-freezing agent containing hopper to the rear, and a spraying device for spraying the anti-freezing agent sent from the conveying means. In the road maintenance vehicle comprising the antifreezing agent spraying vehicle provided, a water container having a pipe connection port at the bottom is detachably installed in the antifreezing agent storage hopper, and water is sprayed to the pipe connection port of the water container. A road maintenance vehicle characterized by connecting piping . A conveyor cover which is spanned horizontally in the front-rear direction in a central portion of the antifreeze agent storage hopper is detachably supported the water container placing table, a water container placed in the water container placement onto table, the water container The road maintenance vehicle according to claim 1, wherein a pipe connection port provided at a bottom portion of the anti-freezing agent is faced to a lower end opening portion of the anti-freezing agent storage hopper. The road maintenance vehicle according to claim 1 or 2, wherein a water supply pipe is connected in place of the water sprinkling pipe connected to the pipe connection port provided at the bottom of the water container. A sprinkler pipe provided with a sprinkling nozzle at the tip is disposed on the lower surface of the rear end of the sprinkler car body, and the sprinkler pipe is connected to a solution tank mounted on the sprinkler car body via a solution pump, A watering wheel is configured by connecting a watering pipe connected to a pipe connection port at the bottom of a water container installed in an antifreezing agent containing hopper to the watering pipe. The road maintenance vehicle according to claim 3. 5. The road maintenance vehicle according to claim 4, wherein the solution pump is connected to a spray pipe and a spray pipe having a water spray nozzle disposed on the antifreezing agent spray disk via a switching valve. A branch pipe is connected to a water spray pipe between the solution tank and the solution pump, a high pressure pump is interposed in the pipe of the branch pipe, and a high pressure water injection nozzle is attached to the tip of the branch pipe. The road maintenance vehicle according to claim 4 or 5. A sprinkling pipe a solution pump via a switching valve to connect the spray pipe having a water spray nozzle disposed on the antifreeze agent diffusing onto disk, to a water pipe equipped with a stirrer nozzles for agitating the inside of the water container to the tip The road maintenance vehicle according to claim 4 or 5, wherein The water container is made of a thick waterproof cloth and is formed in a foldable bag shape, and has a water inlet on its top wall surface and a pipe connection port on its bottom. The road maintenance vehicle according to any one of the above.

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