Disaster prevention vehicle

Abstract

To provide a disaster prevention vehicle that allows a fire pump driven by the power taken out from a travelling engine by a power take-out device, and arranged under the floor of a load box to be arranged in a well-balanced manner, and allows a change in the layout to be made easily.SOLUTION: A disaster prevention vehicle includes: a sub-frame 3 attached on a chassis frame 2; a load box 6 attached to the sub-frame 3; and a fire pump 8 driven by the power taken out from a travelling engine 5 by a power take-out device 10, and arranged under the floor of the load box 6 in the rear part of the vehicle. The fire pump 8 includes: an impeller; an impeller rotation shaft for rotating the impeller; a power input shaft to which rotation power from the power take-out device 10 on a vehicle front side is input through a drive shaft 11; and a transmission mechanism for transmitting the rotation power input to the power input shaft to the impeller rotation shaft while separating the shaft center of the impeller rotation shaft and the shaft center of the power input shaft in parallel.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a disaster prevention vehicle equipped with a cargo box and a fire pump for rescue activities and firefighting activities.

Background Art

[0002] Conventionally, there are disaster prevention vehicles that are dispatched for rescue activities and firefighting activities when disasters such as fires, earthquakes, and accidents occur. Some disaster prevention vehicles are equipped with both a fire pump for firefighting activities and a storage space for storing equipment for rescue activities. As such a disaster prevention vehicle, for example, the vehicle disclosed in Patent Document 1 (referred to as a "fire truck" in the same document) can be cited. The disaster prevention vehicle disclosed in Patent Document 1 includes a sub-frame attached to a chassis frame, a cargo box attached to the sub-frame, and a fire pump driven by power taken out from a traveling engine by a power take-off device. On the floor inside the cargo box, a water tank and a storage space are provided. Firefighting water is stored in the water tank. Also, equipment is stored in the storage space.

[0003] Further, in the disaster prevention vehicle of Patent Document 1, the fire pump is disposed at the rear of the vehicle and below the storage space. This fire pump is connected to the power take-off device at the front of the vehicle by a drive shaft. The drive shaft is disposed below the water tank and the storage space. The drive shaft is configured using a plurality of drive shafts connected to each other via a joint member.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In conventional disaster prevention vehicles such as Patent Document 1, it has been difficult to add equipment in order to respond to both rescue activities and firefighting activities. Specifically, when attempting to add equipment while ensuring the capacity of the storage space, since a water tank is already arranged on the floor of the loading box, there has been a problem that it is difficult to add equipment on the floor of the loading box. Therefore, it was considered to add equipment under the floor of the loading box, but in that case, it was necessary to add equipment while avoiding interference between the drive shaft and the fire pump.

[0006] However, conventionally, the drive shaft was connected to the drive shaft connection part of the fire pump. This drive shaft connection part was provided on the extension of the impeller rotation shaft that rotates the impeller of the fire pump. Since there is a limit to the connection angle of the drive shaft with respect to the drive shaft connection part, when attempting to add equipment near the fire pump, the layout change of the fire pump accordingly was restricted.

[0007] The present invention has been made in consideration of the above circumstances, and its object is to provide a disaster prevention vehicle that can be balancedly arranged and whose layout can be easily changed for a fire pump that is driven by power taken out by a power take-off device from a running engine and is arranged under the floor of a loading box.

Means for Solving the Problems

[0008] In order to solve the above problems, the invention disclosed in this specification is configured as follows. That is, a first invention is a disaster prevention vehicle including a sub-frame attached to a chassis frame, a loading box attached to the sub-frame, and a fire pump driven by power taken out from a traveling engine by a power take-off device and disposed at the rear of the vehicle and under the floor of the loading box. The fire pump includes an impeller, an impeller rotating shaft for rotating the impeller, a power input shaft to which rotational power from the power take-off device on the front side of the vehicle is input via a drive shaft, and a transmission mechanism for transmitting the rotational power input to the power input shaft to the impeller rotating shaft while parallelly separating the axis of the impeller rotating shaft and the axis of the power input shaft. It is characterized by comprising the above.

[0009] According to the first invention, rotational power from the power take-off device is input to the power input shaft via the drive shaft. Further, the axis of the power input shaft is parallelly separated from the axis of the impeller rotating shaft for rotating the impeller of the fire pump. The rotational power input to the power input shaft is transmitted to the impeller rotating shaft by the transmission mechanism. Thereby, it is possible to eliminate the need to provide the connection position of the drive shaft to the fire pump on the extension of the impeller rotating shaft. And while appropriately maintaining the connection angle of the drive shaft to the drive shaft connection portion on the power input shaft, the positions of the impeller and its casing can be shifted vertically, horizontally, and laterally with respect to the drive shaft connection portion. Thereby, when adding equipment near the fire pump under the floor of the loading box, additional equipment and the fire pump can be arranged in a well-balanced manner. Also, equipment can be added more flexibly than before, and the layout change of the fire pump at that time can be easily performed. Since it is possible to easily add equipment under the floor of the loading box, the equipment storage space on the floor of the loading box can be maintained as before.

[0010] In the second invention, in the first invention, a vacuum pump for exhausting the internal air and filling with priming water when starting the fire pump is attached to the transmission mechanism casing to which the transmission mechanism is attached, and the transmission mechanism is configured to transmit the rotational power input to the power input shaft to a pump rotating shaft for imparting a rotational driving force to the vacuum pump.

[0011] According to the second invention, by attaching a vacuum pump to the transmission mechanism casing, the fire pump and the vacuum pump can be integrated. Further, since the transmission mechanism is configured to transmit the rotational power input to the power input shaft to a pump rotating shaft for imparting a rotational driving force to the vacuum pump, the drive source of the vacuum pump and the drive source of the fire pump can be made into one. Thereby, the arrangement space of the fire pump and the vacuum pump can be reduced, so that it is possible to easily add equipment near the fire pump.

[0012] In the third invention, in the second invention, the axis of the impeller rotating shaft and the axis of the pump rotating shaft are arranged so as to be parallel and spaced apart, and the power input shaft is arranged above the impeller rotating shaft, while the pump rotating shaft is configured to be arranged laterally of the impeller rotating shaft.

[0013] According to the third invention, the power input shaft is arranged above the impeller rotating shaft. Thereby, even when the power take-out port of the power take-out device is provided at a height position above the chassis frame and the height position of the impeller rotating shaft of the fire pump is located at or below the chassis frame, the power from the traveling engine can be transmitted to the impeller rotating shaft while appropriately maintaining the connection angle of the drive shaft to the drive shaft connection portion on the power input shaft. Further, since the pump rotating shaft of the vacuum pump is arranged laterally of the impeller rotating shaft, it is possible to suppress the fire pump and the vacuum pump from protruding greatly below the chassis frame. Thereby, it is possible to arrange the fire pump with a sufficient clearance from the road surface.

[0014] In the fourth invention, in the third invention, the transmission mechanism casing includes a first mounting portion for mounting the vacuum pump on one side in the vehicle width direction and a second mounting portion on the other side in the vehicle width direction, and the second mounting portion is mounted on a pump support frame for supporting the fire pump in a hanging manner from the subframe. This is the gist of the invention.

[0015] According to the fourth invention, the fire pump and the vacuum pump can be easily arranged under the floor of the load box by the pump support frame. Further, since the fire pump is mounted on the pump support frame from one side in the vehicle width direction, the fire pump can be arranged with the vertical distance between the floor portion of the load box and the fire pump being made as small as possible. Thereby, even when the vertical dimension of the fire pump is large, it is possible to suppress the fire pump from protruding greatly below the chassis frame. Thereby, it is possible to arrange the fire pump while ensuring a sufficient clearance from the road surface.

[0016] In the fifth invention, in any one of the second to fourth inventions, a water tank water supply pipe for sending the fire extinguishing water sucked up from outside the vehicle by driving the fire pump to a water tank inside the load box, and a water tank water suction pipe for supplying the fire extinguishing water stored in the water tank to the fire pump for discharging are provided. The water tank water supply pipe is arranged on one side in the vehicle width direction of the fire pump so as to partially overlap the fire pump when viewed from the side of the vehicle, while the water tank water suction pipe is arranged on the other side in the vehicle width direction of the fire pump so as to partially overlap the fire pump when viewed from the side of the vehicle. This is the gist of the invention.

[0017] According to the fifth invention, it is possible to secure a storage space for equipment by minimizing the presence of the water tank water supply pipe and the water tank water suction pipe on the floor of the load box, and it is possible to make the weight balance and the drive balance of the fire pump in the vehicle width direction appropriate.

Advantages of the Invention

[0018] According to the disaster prevention vehicle of the present invention, the fire pump driven by the power taken out from the driving engine by the power take-out device and arranged under the floor of the loading box can be arranged in a well-balanced manner and the layout can be easily changed.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Mode for Carrying Out the Invention

[0020] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0021] FIG. 1 is a side view of a disaster prevention vehicle 1 according to an embodiment of the present invention. This disaster prevention vehicle 1 is a vehicle capable of performing fire fighting activities and rescue activities simultaneously. As shown in FIG. 1, the disaster prevention vehicle 1 includes a cab 4 provided at the front part of a chassis frame 2, a sub-frame 3 attached onto the chassis frame 2 behind the cab 4, a loading box 6 attached to the sub-frame 3, and a fire pump 8. Inside the cab 4, a driver's seat, a rear seat for crew members to sit on, etc. are provided. Inside the loading box 6, a number of equipment items necessary for fire fighting activities and rescue activities are stored. The fire pump 8 is constituted by, for example, a centrifugal pump, and supplies the fire fighting water sucked up from a water source for fire fighting activities to a water discharge destination. The fire pump 8 is arranged under the floor of the rear part of the vehicle and under the loading box 6. An operation panel 22 for controlling the operation of the fire pump 8 is provided at the rear end of the loading box 2.

[0022] FIG. 2 is a side view of a main part for explaining the layout of the fire pump 8 mounted on the disaster prevention vehicle 1 and its surroundings. FIG. 3 is a plan view of a main part for explaining the layout of the fire pump 8 mounted on the disaster prevention vehicle 1 and its surroundings.

[0023] As shown in FIG. 2, the disaster prevention vehicle 1 includes a water tank 7 and an equipment storage space 6c on the floor part 6a inside the loading box 6. Further, the disaster prevention vehicle 1 includes a winch device 14 between the front and rear of the rear wheel 1a and the fire pump 8 below the floor part 6a inside the loading box 6. The water tank 7 is provided for storing fire fighting water and is arranged at the front part of the loading box 6. The equipment storage space 6c is provided behind the water tank 7. Equipment items that can be carried by crew members are stored in the equipment storage space 6c. For example, as this equipment, a fire hose for use in fire fighting activities and a hydraulic cutter for use in rescue activities can be mentioned. The winch device 14 is provided for rescue activities. The winch device 14 is used, for example, to rescue a person in need of rescue trapped inside an accident vehicle at the scene of a traffic accident.

[0024] As shown in Fig. 3, a pair of left and right chassis frames 2 are provided so as to extend in the longitudinal direction of the vehicle. The front portions of the pair of left and right chassis frames 2, 2 and between the left and right of the pair of left and right chassis frames 2, 2 are provided with a traveling engine 5 and a clutch transmission unit 51. A power take-off device 10 for taking out the power of the traveling engine 5 is attached to the clutch transmission unit 51. Above the chassis frame 2 and above the clutch transmission unit 51, a power take-out port of the power take-off device 10 is provided. The sub-frame 3 includes a right sub-frame 3a, a left first sub-frame 3b, a left second sub-frame 3c, an overhanging member 3d, a first cross member 3e, and a second cross member 3f.

[0025] The right sub-frame 3a is attached along the upper surface of the right chassis frame 2. The right sub-frame 3a extends from the front end portion of the load box 6 to the rear end portion of the load box 6. The right chassis frame 2 extends from the front portion of the vehicle to the same position as the rear end of the right sub-frame 3a. The left first sub-frame 3b is attached along the upper surface of the left chassis frame 2. The left first sub-frame 3b extends from the front end portion of the load box 6 to the position of the winch device 14. The left chassis frame 2 extends from the front portion of the vehicle to the same position as the rear end of the left first sub-frame 3b.

[0026] The left second sub-frame 3c is disposed at a position separated outward in the vehicle width direction (left side of the vehicle) from the left first sub-frame 3b. The rear portion of the left first sub-frame 3b and the front portion of the left second sub-frame 3c are connected by an overhanging member 3d. The left second sub-frame 3c is disposed parallel to the right sub-frame 3a. The rear end of the left second sub-frame 3c extends to the same position as the rear end of the right sub-frame 3a. As shown in Figs. 2 and 3, the first cross member 3e connects the right sub-frame 3a and the left first sub-frame 3b at a position slightly forward of the rear wheel 1a. Also, the second cross member 3f connects the right sub-frame 3a and the left first sub-frame 3b at a position slightly rearward of the rear wheel 1a.

[0027] As shown in FIG. 2, a floor base member 6b is attached to the upper surfaces of the first cross member 3e and the second cross member 3f. The floor base member 6b is also provided at the position of the front end portion of the loading box 6 and the position of the rear end portion of the loading box 6. The floor portion 6a of the loading box 6 is attached to the upper surface of the floor base member 6b. The floor base member 6b supports the floor portion 6a and provides a slight gap between the lower surface of the floor portion 6a and the upper surface of the subframe 3.

[0028] The fire pump 8 is driven by the power taken out from the traveling engine 5 by the power take-off device 10. As shown in FIGS. 2 and 3, the power take-out port of the power take-off device 10 and the fire pump 8 are connected by a drive shaft 11. The drive shaft 11 has a first drive shaft 11a, a second drive shaft 11b, a third drive shaft 11c, a first joint portion 11d, and a second joint portion 11e. The first drive shaft 11a, the second drive shaft 11b, and the third drive shaft 11c are arranged in this order from the power take-out port side of the power take-off device 10 toward the fire pump 8. The first joint portion 11d connects and rotatably supports the first drive shaft 11a and the second drive shaft 11b. The second joint portion 11e connects and rotatably supports the second drive shaft 11b and the third drive shaft 11c. The first joint portion 11d is attached to the first joint support member 12.

[0029] The left and right ends of the first joint support member 12 are connected to the right sub-frame 3a and the left first sub-frame 3b at positions in front of the vehicle relative to the first cross-member 3e. Further, the second joint portion 11e is attached to the second joint support member 13. The left and right ends of the second joint support member 13 are connected to the right sub-frame 3a and the left first sub-frame 3b at positions between the front and rear of the first cross-member 3e and the second cross-member 3f. The second drive shaft 11b and the third drive shaft 11c are arranged at approximately the height position of the sub-frame 3 when viewed from the side of the vehicle, as shown in FIG. 2. Note that the first cross-member 3e is provided with a hole for allowing the second drive shaft 11b to pass through in the longitudinal direction of the vehicle. Further, the second cross-member 3f is provided with a hole for allowing the third drive shaft 11c to pass through in the longitudinal direction of the vehicle.

[0030] FIG. 4 is an enlarged plan view of the main part of FIG. 3. FIG. 5 is a simplified front view of the winch device 14 mounted on the disaster prevention vehicle 1 as viewed from the front side of the vehicle. As shown in FIGS. 4 and 5, the winch device 14 is attached to the right sub-frame 3a and the left first sub-frame 3b via a winch support frame 15. The winch support frame 15 has a left and right connecting member 15a that connects the right sub-frame 3a and the left first sub-frame 3b, a main body mounting bracket 15b, a first downward extension member 15c, and a second downward extension member 15d.

[0031] The main body mounting bracket 15b is provided closer to the right sub-frame 3a in the left and right connecting member 15a. The first downward extension member 15c and the second downward extension member 15d are provided closer to the left first sub-frame 3b in the left and right connecting member 15a. The first downward extension member 15c and the second downward extension member 15d are arranged at a predetermined interval in the longitudinal direction (left and right direction) of the left and right connecting member 15. The first downward extension member 15c and the second downward extension member 15d are provided so as to extend downward from the left and right connecting member 15a. The third drive shaft 11c is arranged between the first downward extension member 15c and the second downward extension member 15d.

[0032] The winch device 14 has a main body portion 142, a wire storage portion 143, and a wire guide portion 144. The main body portion 142 has a mechanism inside for feeding out and pulling in the wire 141. The main body portion 142 is attached to the left and right connecting members 15a by a main body mounting bracket 15b. The main body portion 142 is arranged in a form suspended from the left and right connecting members 15a. The wire storage portion 143 is formed in a substantially short cylindrical outer shape. The wire storage portion 143 has a mechanism for storing the wire 141 wound by the main body portion 142 so as not to get entangled. The wire storage portion 143 is attached to the lower end portions of the first lower extension member 15c and the second lower extension member 15d. The wire guide portion 144 connects the main body portion 142 and the wire storage portion 143. The wire guide portion 144 has a function that allows the wire 141 to move smoothly between the main body portion 142 and the wire storage portion 143.

[0033] FIG. 6 is a front view of the fire pump 8 of the present embodiment as viewed from the front side of the vehicle. FIG. 7 is a schematic diagram for explaining the transmission mechanism 85 of the fire pump 8. As shown in FIGS. 4 and 6, the fire pump 8 includes an impeller casing 81, an impeller 82 disposed inside the impeller casing 81, an impeller rotating shaft 83 for rotating the impeller 82, a power input shaft 84, a transmission mechanism casing 86, and a transmission mechanism 85 provided in the transmission mechanism casing 86. A suction port 8a for fire extinguishing water is provided on the rear side of the vehicle of the impeller casing 81. Further, a transmission mechanism casing 86 is attached to the front side of the vehicle of the impeller casing 81. The axis C1 of the impeller rotating shaft 83 extends in the vehicle front-rear direction. An impeller-side pulley 85d is connected to the front end portion of the impeller rotating shaft 83 on the front side of the vehicle. Further, the impeller-side pulley 85d is provided outside the transmission mechanism casing 86.

[0034] The power input shaft 84 is attached to the transmission mechanism casing 86. Rotational power from the power take-off devices 10 on both front sides is input to the power input shaft 84 via the drive shaft 11. The axis C2 of the power input shaft 84 extends in the longitudinal direction of the vehicle. Most of the power input shaft 84 is disposed inside the transmission mechanism casing 86, but the front-end portion of the power input shaft 84 on the vehicle side is exposed outside the transmission mechanism casing 86. A drive shaft connection portion 84a is provided at the front-end portion of the power input shaft 84 on the vehicle side. The rear-end portion of the third drive shaft 11c on the vehicle side is connected to the drive shaft connection portion 84a.

[0035] The transmission mechanism 85 transmits the rotational power input to the power input shaft 84 to the impeller rotating shaft 83 while parallelly separating the axis C1 of the impeller rotating shaft 83 and the axis C2 of the power input shaft 84. The power input shaft 84 is disposed above the impeller rotating shaft 83. As shown in FIG. 7, the transmission mechanism 85 includes an input shaft side gear 85a and an impeller side gear 85b. The input shaft side gear 85a and the impeller side gear 85b are disposed inside the transmission mechanism casing 86.

[0036] The input shaft side gear 85a is provided on the power input shaft 84 so as to rotate integrally with the power input shaft 84. The impeller side gear 85b is provided on the impeller rotating shaft 83 so as to rotate integrally with the impeller rotating shaft 83. The input shaft side gear 85a and the impeller side gear 85b are meshed with each other. Thus, when the power input shaft 84 rotates, the impeller rotating shaft 83 is configured to rotate accordingly. The input shaft side gear 85a and the impeller side gear 85b are configured to have a predetermined gear ratio. Thereby, the relationship among the engine speed of the traveling engine 5, the rotational speed of the drive shaft 11, and the rotational speed of the fire pump 8 is set appropriately. Note that by changing this gear ratio, it is possible to easily change the setting of the rotational speed of each part.

[0037] As shown in FIGS. 6 and 7, the transmission mechanism casing 86 includes a first mounting portion 86a for mounting the vacuum pump 9 on one side in the vehicle width direction (one side in the left-right direction), and a second mounting portion 86b on the other side in the vehicle width direction (the other side in the left-right direction). Specifically, the first mounting portion 86a is formed on the left side surface of the transmission mechanism casing 86 in the vehicle. The vacuum pump 9 is mounted on the first mounting portion 86a. The vacuum pump 9 is provided for exhausting the internal air and filling it with suction water when the fire pump 8 is started. The vacuum pump 9 is integrated with the fire pump 8 by being mounted on the first mounting portion 86. The vacuum pump 9 has a pump rotation shaft 91 for receiving a rotational driving force from the outside. The axis C3 of the pump rotation shaft 91 and the axis C1 of the impeller rotation shaft 83 are arranged parallel to each other and spaced apart. More specifically, the pump rotation shaft 91 is arranged at a position horizontally separated to the left side of the vehicle with respect to the impeller rotation shaft 83.

[0038] Most of the pump rotation shaft 91 is arranged inside the vacuum pump 9. However, the front end portion of the pump rotation shaft 91 on the vehicle side is exposed outside the transmission mechanism casing 86. A vacuum pump side pulley 85e is mounted on the front end portion of the pump rotation shaft 91 on the vehicle side. The transmission mechanism 85 is configured to transmit the rotational power input to the power input shaft 84 to the pump rotation shaft 91 for applying a rotational driving force to the vacuum pump 9. Specifically, the transmission mechanism 85 includes an impeller side pulley 85d, a vacuum pump side pulley 85e with an electromagnetic clutch 85c, and a transmission belt 85f stretched between the impeller side pulley 85d and the vacuum pump side pulley 85e.

[0039] When rotational power is input from the drive shaft 11 to the power input shaft 84, the impeller rotating shaft 83 is rotated by the meshing of the input shaft side gear 85a and the impeller side gear 85b. When the impeller rotating shaft 83 is rotated, the impeller side pulley 85d is also rotated via the electromagnetic clutch 85c. The rotation of the impeller side pulley 85d is transmitted to the vacuum pump side pulley 85e via the transmission belt 85f. When the vacuum pump side pulley 85e is rotated, the pump rotating shaft 91 is rotated.

[0040] Since the vacuum pump 9 is provided to exhaust the air inside and fill it with priming water when the fire pump 8 is started, once the inside of the fire pump 8 is filled with priming water, driving the vacuum pump 9 any further would be a waste in terms of energy consumption efficiency. Therefore, except when the fire pump 8 is started, by setting the electromagnetic clutch 85c to the disengaged position, even if the impeller rotating shaft 83 is rotated as the power input shaft 84 rotates, the vacuum pump 9 can be prevented from rotating. This enables efficient operation of the vacuum pump 9.

[0041] As shown in FIGS. 2 and 4, the second attachment portion 86b of the transmission mechanism casing 86 is attached to a pump support frame 16 for supporting the fire pump 8 in a hanging manner from the sub-frame 3. The pump support frame 16 includes a pair of front and rear left and right connecting members 16a, 16a that span between the right sub-frame 3a and the left second sub-frame 3c, and a mounting base 16b that hangs down from the longitudinal center portion of the pair of front and rear left and right connecting members 16a, 16a. Both end portions of each left and right connecting member 16a are fixed to the upper surfaces of the right sub-frame 3a and the left second sub-frame 3c by fastening members or the like. Also, the upper end of the mounting base 16b is fixed to the lower surfaces of the pair of front and rear left and right connecting members 16a, 16a by welding or the like. The portion of the second attachment portion 86b of the transmission mechanism casing 86 is fixed to the mounting base 16b by fastening members or the like. Thereby, the fire pump 8 and the vacuum pump 9 are arranged so as to hang down from the right sub-frame 3a and the left second sub-frame 3c.

[0042] FIG. 8 is a piping system diagram of the disaster prevention vehicle 1 of the present embodiment. FIG. 9 is a main part plan view showing the piping layout of the disaster prevention vehicle 1. FIG. 10 is a main part side view showing the layout of the water tank suction pipe 18 in the disaster prevention vehicle 1. FIG. 11 is a main part side view showing the layout of the first water tank water supply pipe 20 in the disaster prevention vehicle 1. As shown in FIGS. 8 and 9, the disaster prevention vehicle 1 includes a pump suction pipe 17, a water tank suction pipe 18, a discharge pipe 19, a first water tank water supply pipe 20, and a second water tank water supply pipe 21.

[0043] The pump suction pipe 17 is a pipe for supplying fire extinguishing water sucked from a water source outside the vehicle or fire extinguishing water stored in the water tank 7 into the fire pump 8 through the suction port 8a. The pump suction pipe 17 has a manifold 171, a first suction port 172, a second suction port 173, a first suction on-off valve 174, and a second suction on-off valve 175. The manifold 171 has an outer appearance formed in a substantially rectangular parallelepiped shape. The manifold 171 is configured by attaching a plurality of flanges 171b, 171c, 171d to a main body portion 171a formed in a rectangular parallelepiped shape by welding a metal plate material. A flange 171b is provided on the front side surface of the vehicle of the manifold 171. The flange 171b is connected to the suction port 8a of the fire pump 8. Two flanges 171c, 171c are provided on the rear side surface of the vehicle of the manifold 171.

[0044] Two flanges 171c, 171c are connected to a first water suction on-off valve 174 and a second water suction on-off valve 175. A first water suction port 172 is provided at the tip of the first water suction on-off valve 174. Also, a second water suction port 173 is provided at the tip of the second water suction on-off valve 175. The first water suction port 172 and the second water suction port 173 are provided for introducing the fire extinguishing water from a water source outside the vehicle to the fire pump 8. The first water suction port 172 and the second water suction port 173 are arranged so that a crew member can access them from the rear end of the vehicle. The first water suction port 172 and the second water suction port 173 are arranged side by side on the left and right at the rear end of the vehicle. A flange 171d is provided on the left side surface of the vehicle of the manifold 171. The flange 171d is connected to a water tank suction pipe 18.

[0045] The water tank suction pipe 18 is a pipe for supplying the fire extinguishing water stored in the water tank 7 to the fire pump 8 for discharging. As shown in FIGS. 8 to 10, the water tank suction pipe 18 has an upstream end at a discharge port 73 provided at the rear end of the water tank 7. Also, the water tank suction pipe 18 has a downstream end at a connection portion to the flange 171d of the manifold 171. The water tank suction pipe 18 has a motor-operated on-off valve 181 for water tank suction. When the fire extinguishing water in the water tank 7 is not supplied to the fire pump 8, the motor-operated on-off valve 181 for water tank suction is closed.

[0046] The discharge port 73 at the upstream end of the water tank suction pipe 18 is arranged above the floor portion 6a of the load box 6 as shown in FIG. 10. On the other hand, the manifold 171 to which the downstream end of the water tank suction pipe 18 is connected is arranged below the floor portion 6a of the load box 6. Therefore, the water tank suction pipe 18 is guided from above the floor portion 6a to below through a floor opening 6d provided in the floor portion 6a. The motor-operated on-off valve 181 for water tank suction of the water tank suction pipe 18 is located above the floor portion 6a. The water tank suction pipe 18 is configured to extend linearly along the sub-frame 3 from directly below the floor opening 6d of the load box 6 to a position above the manifold 171. Also, the water tank suction pipe 18 is arranged on the left side of the fire pump 8 so as to partially overlap the fire pump 8 in a side view of the vehicle.

[0047] The discharge pipe 19 is a pipe provided on the discharge side of the fire pump 8. As shown in FIGS. 8, 9, and 11, the discharge pipe 19 has a check valve 191, a first water discharge port 192, a second water discharge port 193, a first water discharge on-off valve 194, and a second water discharge on-off valve 195. The discharge pipe 19 has the discharge port 8b of the fire pump 8 as its upstream end. Also, the discharge pipe 19 has the first water discharge port 192 and the second water discharge port 193 as its downstream ends. As shown in FIG. 4, when viewed in plan, the discharge pipe 19 is configured to start from the discharge port 8b located on the left side of the vehicle and be guided to the right side of the vehicle through above the manifold 171.

[0048] As shown in FIG. 8, the check valve 191 is provided near the discharge port 8b. The check valve 191 is provided to close the flow path in the discharge pipe 19 and prevent the fire extinguishing water in the fire pump 8 from flowing backward when the running engine 5 stops. A first water discharge on-off valve 194 is provided near the first water discharge port 192. Also, a second water discharge on-off valve 195 is provided near the second water discharge port 193. As shown in FIGS. 9 and 11, the first water discharge port 192 and the second water discharge port 193 are arranged so that crew members can access them from the rear end of the vehicle. The first water discharge port 192 and the second water discharge port 193 are arranged side by side vertically at the rear end of the vehicle.

[0049] As shown in FIG. 8, a chemical liquid tank 32 is connected to the middle part of the discharge pipe 19 via a chemical liquid injection pipe 31. Further, in the middle part of the chemical liquid injection pipe 31, a motor pump unit 33 for foaming the chemical liquid in the chemical liquid tank 32 and sending it into the discharge pipe 19 is provided, and a check valve 34 for preventing backflow is provided on the downstream side thereof.

[0050] The first water tank water supply pipe 20 is a pipe that supplies the fire extinguishing water sucked up from outside the vehicle to the water tank 7 inside the load box 6 by driving the fire pump 8. As shown in FIGS. 8, 9, and 11, the first water tank water supply pipe 20 is connected to the middle part of the discharge pipe 19, and the connection part is used as the upstream end. Also, the first water tank water supply pipe 20 uses the first inlet 71 provided at the rear end of the water tank 7 as the downstream end. The first water tank water supply pipe 20 has an electrically operated on-off valve 201 for water tank water supply. The electrically operated on-off valve 201 for water tank water supply is arranged at the connection part with the discharge pipe 19. When the fire extinguishing water sucked up from outside the vehicle is not stored in the water tank 7, the electrically operated on-off valve 201 for water tank water supply is closed.

[0051] As shown in FIG. 11, the first inlet 71 at the downstream end of the first water tank water supply pipe 20 is arranged above the floor part 6a of the load box 6. On the other hand, the electrically operated on-off valve 201 for water tank water supply arranged at the upstream end of the first water tank water supply pipe 20 is arranged below the floor part 6a of the load box 6. Therefore, the first water tank water supply pipe 20 is guided from below to above the floor part 6a through the floor opening 6d provided in the floor part 6a. The first water tank water supply pipe 20 is arranged on the right side of the fire pump 8 so as to partially overlap the fire pump 8 in a side view of the vehicle.

[0052] The second water tank water supply pipe 21 is a pipe for supplying the fire extinguishing water pumped up from outside the vehicle to the water tank 7 inside the cargo box 6 by driving a pump outside the vehicle that is separate from the fire pump 8. As shown in FIGS. 8 and 9, the second water tank water supply pipe 21 has a right water supply port 211, a left water supply port 212, a right water supply on-off valve 213, and a left water supply on-off valve 214. The second water tank water supply pipe 21 has the right water supply port 211 and the left water supply port 212 as its upstream ends. The right water supply port 211 is arranged on the right side of the vehicle so that a crew member can access it from the right side of the vehicle. The left water supply port 212 is arranged on the left side of the vehicle so that a crew member can access it from the left side of the vehicle. The pipe extending downstream from the right water supply port 211 and the pipe extending downstream from the left water supply port 212 merge in the middle to form a single pipe and are connected to a second inlet 72 provided at the rear end of the water tank 7. The downstream end of the second water tank water supply pipe 21 is this second inlet 72. The right water supply on-off valve 213 is provided near the right water supply port 211. Also, the left water supply on-off valve 214 is provided near the left water supply port 212.

[0053] As described above, the disaster prevention vehicle 1 according to the present embodiment includes a sub-frame 3 attached to the chassis frame 2, a cargo box 6 attached to the sub-frame 3, and a fire pump 8 that is driven by the power taken out from the traveling engine 5 by the power take-off device 10 and is arranged under the floor of the rear part of the vehicle and the cargo box 6. The fire pump 8 includes an impeller 82, an impeller rotating shaft 83 for rotating the impeller 82, a power input shaft 84 to which the rotational power from the power take-off device 10 on the front side of the vehicle is input via the drive shaft 11, and a transmission mechanism 85 that transmits the rotational power input to the power input shaft 84 to the impeller rotating shaft 83 while keeping the axis C1 of the impeller rotating shaft 83 and the axis C2 of the power input shaft 84 parallel and spaced apart.

[0054] According to the above configuration, the rotational power from the power take-off device 10 is input to the power input shaft 84 via the drive shaft 11. Further, the axis C2 of the power input shaft 84 is spaced apart in parallel from the axis C1 of the impeller rotating shaft 83 that rotates the impeller 82 of the fire pump 8. The rotational power input to the power input shaft 84 is transmitted to the impeller rotating shaft 83 by the transmission mechanism 85. As a result, it is not necessary to provide the connection position of the drive shaft 11 to the fire pump 8 on the extension of the impeller rotating shaft 83. And while appropriately maintaining the connection angle of the drive shaft 11 to the drive shaft connection portion 84a on the power input shaft 84, the positions of the impeller 82 and the impeller casing 81 can be shifted vertically, horizontally, and diagonally with respect to the drive shaft connection portion 84a. Thereby, when additional equipment is added near the fire pump 8 under the floor of the load box 6, the additional equipment and the fire pump 8 can be arranged in a well-balanced manner. Also, the addition of equipment can be performed more flexibly than before, and the layout change of the fire pump 8 at that time can be easily performed. Since the addition of equipment to the floor under the load box 6 can be easily performed, the equipment storage space 6c on the floor of the load box 6 can maintain the same space as before.

[0055] In the above embodiment, a vacuum pump 9 for exhausting the internal air and filling it with priming water when the fire pump 8 is started is attached to the transmission mechanism casing 86 to which the transmission mechanism 85 is attached. The transmission mechanism 85 is configured to transmit the rotational power input to the power input shaft 84 to a pump rotating shaft 91 for applying a rotational driving force to the vacuum pump 9.

[0056] According to the above configuration, by attaching the vacuum pump 9 to the transmission mechanism casing 86, the fire pump 8 and the vacuum pump 9 can be integrated. Further, since the transmission mechanism 85 is configured to transmit the rotational power input to the power input shaft 84 to the pump rotation shaft 91 for applying a rotational driving force to the vacuum pump 9, the drive source of the vacuum pump 9 and the drive source of the fire pump 8 can be made into one. As a result, the arrangement space for the fire pump 8 and the vacuum pump 9 can be reduced, so that it is possible to easily add equipment near the fire pump 8.

[0057] In the above embodiment, the axis C1 of the impeller rotation shaft 83 and the axis C3 of the pump rotation shaft 91 are arranged so as to be parallel and spaced apart. The power input shaft 84 is arranged above the impeller rotation shaft 83, while the pump rotation shaft 91 is configured to be arranged laterally of the impeller rotation shaft 83.

[0058] According to the above configuration, the power input shaft 84 is arranged above the impeller rotation shaft 83. As a result, even when the power take-out port of the power take-out device 10 is provided at a height position above the chassis frame 2 and the impeller rotation shaft 83 of the fire pump 8 is located at the height of the chassis frame 2, the power from the traveling engine 5 can be transmitted to the impeller rotation shaft 83 while appropriately maintaining the connection angle of the drive shaft 11 to the drive shaft connection portion 84a on the power input shaft 84. Further, since the pump rotation shaft 91 of the vacuum pump 9 is arranged laterally of the impeller rotation shaft 83, it is possible to suppress the fire pump 8 and the vacuum pump 9 from protruding greatly below the chassis frame 2. As a result, it is possible to arrange the fire pump 8 while ensuring a sufficient clearance from the road surface.

[0059] In the above-described embodiment, the transmission mechanism casing 86 includes a first attachment portion 86a for attaching the vacuum pump 9 to one side in the vehicle width direction (left side of the vehicle), and a second attachment portion 86b on the other side in the vehicle width direction (right side of the vehicle). The second attachment portion 86b is attached to a pump support frame 16 that supports the fire pump 8 in a hanging manner from the subframe 3.

[0060] According to the above configuration, the pump support frame 16 can easily arrange the fire pump 8 and the vacuum pump 9 under the floor of the load box 6. Further, since the fire pump 8 is attached to the pump support frame 16 from one side in the vehicle width direction, the fire pump 8 can be arranged in a state where the vertical distance between the floor portion 6a of the load box 6 and the fire pump 8 is minimized. Thereby, even when the vertical dimension of the fire pump 8 is large, it is possible to suppress the fire pump 8 from protruding significantly below the chassis frame 2. As a result, it is possible to arrange the fire pump 8 while ensuring a sufficient clearance from the road surface.

[0061] The disaster prevention vehicle 1 of the above-described embodiment includes a first water tank water supply pipe 20 that supplies the fire extinguishing water sucked from the outside of the vehicle by driving the fire pump 8 to the water tank 7 inside the load box 6, and a water tank water suction pipe 18 that supplies the fire extinguishing water stored in the water tank 7 to the fire pump 8 for discharging water. The first water tank water supply pipe 20 is arranged on one side in the vehicle width direction of the fire pump 8 so as to partially overlap the fire pump 8 when viewed from the side of the vehicle, while the water tank water suction pipe 18 is arranged on the other side in the vehicle width direction of the fire pump 8 so as to partially overlap the fire pump 8 when viewed from the side of the vehicle.

[0062] According to the above configuration, it is possible to secure the equipment storage space 6c so that the first water tank water supply pipe 20 and the water tank water suction pipe 18 are not present on the floor of the load box 6 as much as possible, and to make the weight balance and drive balance of the fire pump 8 in the vehicle width direction appropriate.

[0063] This time, all the disclosed embodiments are illustrative in all respects and do not serve as a basis for a limiting interpretation. The technical scope of the present invention is not construed only by the above-described embodiments, but is defined based on the description of the claims. Also, the technical scope of the present invention includes all modifications within the meaning and scope equivalent to the claims.

[0064] For example, in the above embodiment, the transmission mechanism 85 included the input shaft side gear 85a and the impeller side gear 85b. The input shaft side gear 85a and the impeller side gear 85b were meshed. The present invention is not limited to this, and a plurality of other gears may be meshed between the input shaft side gear and the impeller side gear. Also, the transmission mechanism may transmit rotational power not by a plurality of meshing gears, but by a chain and sprockets.

[0065] Also, in the above embodiment, the power input shaft 84 was disposed above the impeller rotation shaft 83, and the pump rotation shaft 91 was disposed at a position horizontally separated to the left side of the vehicle with respect to the impeller rotation shaft 83. The present invention is not limited to this, and the pump rotation shaft may be provided at a position vertically separated from the impeller rotation shaft. In this case, it is preferable that the vertical distance between the pump rotation shaft and the impeller rotation shaft is smaller than the vertical distance between the power input shaft and the impeller rotation shaft.

[0066] Also, in the above embodiment, the first water tank water supply pipe 20 and the water tank water suction pipe 18 were disposed so as to partially overlap the fire pump 8 when viewed from the side of the vehicle. The present invention is not limited to this, and the first water tank water supply pipe and the water tank water suction pipe may not partially overlap the fire pump 8 when viewed from the side of the vehicle. Also, in the above embodiment, the first water tank water supply pipe 20 was disposed on the right side of the fire pump 8, and the water tank water suction pipe 18 was disposed on the left side of the fire pump 8. The present invention is not limited to this, and the first water tank water supply pipe and the water tank water suction pipe may be disposed on either the left or right side with respect to the fire pump.

Explanation of Reference Numerals

[0067] 1 Disaster prevention vehicle 2 Chassis Frame 3 Sub-Frame 5 Travel Engine 6 Cargo Box 7 Water Tank 8 Fire Pump 9 Vacuum Pump 10 Power Take-Off Device 11 Drive Shaft 16 Pump Support Frame 18 Water Tank Suction Pipe 20 First Water Tank Delivery Pipe 82 Impeller 83 Impeller Rotation Shaft 84 Power Input Shaft 85 Transmission Mechanism 86 Transmission Mechanism Casing 86a First Mounting Portion 86b Second Mounting Portion 91 Pump Rotation Shaft C1 Axis C2 Axis C3 Axis

Claims

1. A disaster prevention vehicle comprising a sub-frame attached to a chassis frame, a loading box attached to the sub-frame, and a fire pump driven by power taken out from a traveling engine by a power take-off device and disposed at the rear of the vehicle and under the floor of the loading box, wherein the fire pump includes an impeller, an impeller rotating shaft for rotating the impeller, a power input shaft to which rotational power from the power take-off device on the front side of the vehicle is input via a drive shaft, and a transmission mechanism for transmitting the rotational power input to the power input shaft to the impeller rotating shaft while separating the axis of the impeller rotating shaft and the axis of the power input shaft in parallel, and characterized by comprising the above.

2. A vacuum pump for exhausting the internal air and filling with priming water when starting the fire pump is attached to a transmission mechanism casing to which the transmission mechanism is attached, and the transmission mechanism is configured to transmit the rotational power input to the power input shaft to a pump rotating shaft for giving a rotational driving force to the vacuum pump. The disaster prevention vehicle according to claim 1, characterized by the above.

3. The axis of the impeller rotating shaft and the axis of the pump rotating shaft are arranged to be separated in parallel, wherein the power input shaft is arranged above the impeller rotating shaft, while the pump rotating shaft is arranged on the side of the impeller rotating shaft. The disaster prevention vehicle according to claim 2, characterized by the above.

4. The transmission mechanism casing includes a first attachment portion for attaching the vacuum pump to one side in the vehicle width direction and a second attachment portion to the other side in the vehicle width direction, and the second attachment portion is attached to a pump support frame for supporting the fire pump in a hanging manner from the sub-frame. The disaster prevention vehicle according to claim 3, characterized by the above.

5. A water tank water supply pipe for supplying the fire extinguishing water sucked up from the outside of the vehicle by driving the fire pump to a water tank inside the loading box, and a water tank water suction pipe for supplying the fire extinguishing water stored in the water tank to the fire pump for discharging, wherein the water tank water supply pipe is arranged on one side in the vehicle width direction of the fire pump so as to partially overlap the fire pump when viewed from the side of the vehicle, while the water tank water suction pipe is configured to be arranged on the other side in the vehicle width direction of the fire pump so as to partially overlap the fire pump when viewed from the side of the vehicle. The disaster prevention vehicle according to any one of claims 2 to 4, characterized in that...

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