Cargo container

Abstract

To provide a work vehicle capable of protecting hydraulic piping and being manufacturable at a low cost.SOLUTION: A work vehicle 1 includes a tractor 2 and a trailer 3. A hydraulic pump 5 on the tractor 2 side and a hydraulic motor 6 on the trailer 3 side are connected through high-pressure side piping 12 extending substantially horizontally and low-pressure side piping 13 to constitute a hydraulic circuit 4. The high-pressure side piping 12 can be separated into a tractor side high-pressure piping 12a on the hydraulic pump 5 side and trailer side high-pressure piping 12b on the hydraulic motor 6 side. The low-pressure side piping 13 can be separated into a tractor side low-pressure piping 13a on the hydraulic pump 5 side and trailer side low-pressure piping 13b on the hydraulic motor 6 side. On the trailer side low-pressure piping 13b on the hydraulic motor 6 side, there is provided a pressure absorbing part 9 for absorbing the pressure of hydraulic oil and the pressure absorbing part 9 has a branch part 16 and dead-end piping 10 continuous to the branch part 16 and having an upward component.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a cargo container transported by a transport vehicle.

Background Art

[0002] For example, a device is disclosed in Patent Document 1, in which a trailer equipped with hydraulic equipment is towed by a tractor having a hydraulic source, or a container equipped with hydraulic equipment is mounted on a tractor having a hydraulic source, and the tractor or the container performs a predetermined operation. In the device disclosed in Patent Document 1, a hydraulic pump (hydraulic source) is provided on the tractor side, and hydraulic equipment is provided on the tank trailer side. Then, the hydraulic equipment is driven by hydraulic oil supplied from the hydraulic pump. The hydraulic equipment is a pump, and the pump can discharge the liquid (fuel) in the tank at high pressure. In a conventional hydraulic pipe as disclosed in Patent Document 1, an accumulator is provided so that the pressure of the hydraulic oil does not rise rapidly. Therefore, when the hydraulic oil in the hydraulic pipe expands, the expanded hydraulic oil moves to the accumulator, preventing the inside of the hydraulic pipe from becoming high pressure and protecting the hydraulic pipe.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, since the accumulator provided in the conventional hydraulic pipe is expensive, it is difficult to reduce the cost of the hydraulic pipe. Therefore, an object of the present invention is to provide a cargo container equipped with a hydraulic pipe that can be manufactured at low cost and is difficult to break.

Means for Solving the Problems

[0005] A first aspect of the present invention for solving the above problems is a cargo container transported by a transport vehicle, which is provided with a hydraulic source on the transport vehicle side, and the cargo container is provided with hydraulic equipment driven by the hydraulic oil of the hydraulic source. The hydraulic equipment is connected to the hydraulic source via a discharge side pipe and a recovery side pipe. The discharge side pipe is separable into a discharge side pipe on the hydraulic source side and a discharge side pipe on the hydraulic equipment side. The recovery side pipe is separable into a recovery side pipe on the hydraulic source side and a recovery side pipe on the hydraulic equipment side. A pressure absorbing portion for absorbing the pressure of the hydraulic oil is provided in the recovery side pipe on the hydraulic equipment side. The pressure absorbing portion is characterized by having a branch portion and a dead-end pipe continuous with the branch portion and having an upward component.

[0006] According to this aspect, there is provided a cargo container transported by a transport vehicle, which is provided with a hydraulic source on the transport vehicle side, and the cargo container is provided with hydraulic equipment driven by the hydraulic oil of the hydraulic source. The hydraulic equipment is connected to the hydraulic source via a discharge side pipe and a recovery side pipe. The discharge side pipe is separable into a discharge side pipe on the hydraulic source side and a discharge side pipe on the hydraulic equipment side. The recovery side pipe is separable into a recovery side pipe on the hydraulic source side and a recovery side pipe on the hydraulic equipment side. Therefore, the hydraulic equipment can be disconnected from the hydraulic source for maintenance. In addition, since a pressure absorbing portion for absorbing the pressure of the hydraulic oil is provided in the recovery side pipe on the hydraulic equipment side, even if the hydraulic oil expands, the pressure absorbing portion absorbs the pressure, and an excessive load is prevented from being applied to the discharge side pipe, the recovery side pipe, and the hydraulic equipment constituting the hydraulic pipe on the hydraulic equipment side. Since the pressure absorbing portion has a branch portion and a dead-end pipe continuous with the branch portion and having an upward component, when the hydraulic oil expands, the hydraulic oil rises along the dead-end pipe. That is, the hydraulic oil enters the dead-end pipe against gravity, suppressing an increase in the pressure in the hydraulic pipe on the hydraulic equipment side. Also, when the hydraulic oil in the pipe contracts, the hydraulic oil in the dead-end pipe moves to the recovery side pipe side. Since the dead-end pipe has an upward component, hydraulic oil will not enter the dead-end pipe unless it expands. Therefore, normally, there is no hydraulic oil in the dead-end pipe, or if there is any, it is a relatively small amount. When the hydraulic oil in the hydraulic equipment, the discharge pipe, and the recovery pipe expands, the expanded amount of hydraulic oil enters the dead-end pipe, preventing the pressure in the hydraulic equipment, the discharge pipe, and the recovery pipe from becoming too high. As a result, the hydraulic equipment and the discharge pipe and recovery pipe on the hydraulic equipment side can be protected. There is no need to install an expensive accumulator in the discharge pipe and recovery pipe on the hydraulic equipment side provided in the cargo container of this embodiment.

[0007] The two pipes are arranged such that the discharge pipe is on the upper side and the recovery pipe is on the lower side. The recovery pipe is bent or curved, and a part of the recovery pipe reaches the height position of the discharge pipe. Preferably, the pressure absorption part is provided at the highest height position of the recovery pipe.

[0008] According to this configuration, the pressure absorption part is arranged at the highest height position of the entire hydraulic circuit including the discharge pipe and the recovery pipe, or at a height position equivalent to the highest height position. Therefore, it is difficult for the hydraulic oil to enter the dead-end pipe. That is, it is easy to keep the inside of the dead-end pipe empty. Therefore, when the hydraulic oil expands, the hydraulic oil can enter the empty dead-end pipe, avoiding the high pressure in the hydraulic pipe on the hydraulic equipment side.

[0009] Preferably, the transport vehicle is a tractor or a container transport vehicle, and the cargo container is a trailer towed by the tractor or a container mounted on the container transport vehicle.

[0010] A related aspect is a work vehicle having a tractor and a trailer, the tractor being provided with a hydraulic power source, and the trailer being provided with hydraulic equipment driven by the hydraulic oil of the hydraulic power source, wherein the hydraulic power source and the hydraulic equipment are connected by a discharge-side pipe and a recovery-side pipe to form a hydraulic circuit, the discharge-side pipe is separable into a discharge-side pipe on the hydraulic power source side and a discharge-side pipe on the hydraulic equipment side, the recovery-side pipe is separable into a recovery-side pipe on the hydraulic power source side and a recovery-side pipe on the hydraulic equipment side, a pressure absorption part for absorbing the pressure of the hydraulic oil is provided in the recovery-side pipe on the hydraulic equipment side, and the pressure absorption part has a branch part and a dead-end pipe continuous with the branch part and having an upward component.

[0011] Yet another related aspect is a work vehicle having a container and a container carrier for carrying the container, the container carrier being provided with a hydraulic power source, and the container being provided with hydraulic equipment driven by the hydraulic oil of the hydraulic power source, wherein the hydraulic power source and the hydraulic equipment are connected by a discharge-side pipe and a recovery-side pipe to form a hydraulic circuit, the discharge-side pipe is separable into a discharge-side pipe on the hydraulic power source side and a discharge-side pipe on the hydraulic equipment side, the recovery-side pipe is separable into a recovery-side pipe on the hydraulic power source side and a recovery-side pipe on the hydraulic equipment side, a pressure absorption part for absorbing the pressure of the hydraulic oil is provided in the recovery-side pipe on the hydraulic equipment side, and the pressure absorption part has a branch part and a dead-end pipe continuous with the branch part and having an upward component.

[0012] According to a related aspect, the work vehicle has a container and a container carrier for carrying the container, the container carrier is provided with a hydraulic power source, and the container is provided with hydraulic equipment driven by the hydraulic oil of the hydraulic power source. The hydraulic power source and the hydraulic equipment are connected by a discharge-side pipe and a recovery-side pipe to form a hydraulic circuit. The discharge-side pipe is separable into a discharge-side pipe on the hydraulic power source side and a discharge-side pipe on the hydraulic equipment side, and the recovery-side pipe is separable into a recovery-side pipe on the hydraulic power source side and a recovery-side pipe on the hydraulic equipment side. Therefore, the hydraulic circuit can be separated into a hydraulic power source side and a hydraulic equipment side, making it easy to individually maintain the hydraulic power source and the hydraulic equipment. Since a pressure absorption part for absorbing the pressure of the hydraulic oil is provided in the recovery side pipe on the hydraulic equipment side, even if the hydraulic oil in the hydraulic circuit expands, the pressure absorption part absorbs the pressure, and it is possible to avoid an excessive load being applied to the pipe on the hydraulic equipment side. Since the pressure absorption part has a branch part and a dead-end pipe that is continuous with the branch part and has an upward component, when the hydraulic oil in the pipe expands, the hydraulic oil enters the dead-end pipe by the amount of expansion. That is, the hydraulic oil enters the dead-end pipe against gravity, suppressing the rise in pressure in the pipe. Also, when the hydraulic oil contracts, the hydraulic oil in the dead-end pipe moves to the recovery side pipe. Since the dead-end pipe has an upward component, the hydraulic oil in the pipe does not enter the dead-end pipe unless it expands. Therefore, normally, there is no hydraulic oil in the dead-end pipe, or if there is, it is a relatively small amount. And only when the hydraulic oil expands, the hydraulic oil can enter the dead-end pipe, preventing the inside of the pipe from becoming high pressure. As a result, the hydraulic pipes constituting the hydraulic circuit on the hydraulic equipment side can be protected. The work vehicle in the related aspect does not require an expensive accumulator and can be configured at low cost.

Advantages of the Invention

[0013] According to the present invention, it is possible to suppress the hydraulic pipes on the hydraulic equipment side provided in the cargo container from becoming high pressure, and the hydraulic pipes on the hydraulic equipment side can be configured at low cost.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Best Mode for Carrying Out the Invention

[0015] Hereinafter, the description will be made with reference to the drawings. As shown in FIG. 1, the work vehicle 1 has a tractor 2 (transport vehicle) and a trailer 3 (cargo container).

[0016] The tractor 2 (towing vehicle) is connected to the trailer 3 (towed vehicle) via an engagement portion 20. The front portion of the trailer 3 is placed on the tractor 2 via the engagement portion 20, and the rear portion of the trailer 3 is supported by wheels 18. Further, the trailer 3 is provided with support legs 19. The support legs 19 are driven to extend and contract by hydraulic pressure, and when extended, they can contact the ground and support the weight of the front portion of the trailer 3, and when contracted, they are separated from the ground.

[0017] In the present embodiment, the trailer 3 is equipped with a fuel tank 14. A supply pipe 15 is connected to the fuel tank 14. The trailer 3 is provided with a hydraulic motor 6 and a pump 17 (FIG. 2(a)). The pump 17 is provided in the middle of the supply pipe 15 (FIG. 2(a)) and is driven by the hydraulic motor 6. That is, the pump 17 is driven by the hydraulic motor 6 and can send the fuel in the fuel tank 14 to a storage tank (underground tank, etc.) not shown via the supply pipe 15.

[0018] The work vehicle 1 is provided with a hydraulic circuit 4. As shown in FIG. 2(a), the hydraulic circuit 4 is provided with a hydraulic pump 5 which is a hydraulic source, a tank 11, and a hydraulic motor 6 (hydraulic device). The hydraulic pump 5 and the tank 11 are provided on the tractor 2. Further, the hydraulic motor 6 is provided on the trailer 3.

[0019] The hydraulic circuit 4 includes a high-pressure pipe 12 (discharge pipe) equipped with a hydraulic pump 5 that discharges and supplies hydraulic oil, and a low-pressure pipe 13 (recovery pipe) that recovers the hydraulic oil to the tank 11. That is, the hydraulic oil is supplied from the hydraulic pump 5 to the hydraulic motor 6 via the high-pressure pipe 12 (discharge pipe), and further recovered from the hydraulic motor 6 to the tank 11 via the low-pressure pipe 13 (recovery pipe).

[0020] The high-pressure pipe 12 includes a tractor-side high-pressure pipe 12a (discharge pipe on the hydraulic source side) and a trailer-side high-pressure pipe 12b (discharge pipe on the hydraulic equipment side). One end of the tractor-side high-pressure pipe 12a is connected to the discharge port of the hydraulic pump 5, and a socket 7a of the hydraulic coupler 7 is attached to the other end. Also, one end of the trailer-side high-pressure pipe 12b is connected to the hydraulic motor 6, and a plug 7b of the hydraulic coupler 7 is attached to the other end. That is, the tractor-side high-pressure pipe 12a and the trailer-side high-pressure pipe 12b are detachably connected by the hydraulic coupler 7. In FIG. 1, a part in the middle of the trailer-side high-pressure pipe 12b is shown broken so as not to intersect with the trailer-side low-pressure pipe 13b and the branch portion 16 described later.

[0021] The low-pressure pipe 13 includes a tractor-side low-pressure pipe 13a (recovery pipe on the hydraulic source side) and a trailer-side low-pressure pipe 13b (recovery pipe on the hydraulic equipment side).

[0022] One end of the tractor-side low-pressure pipe 13a is connected to the tank 11, and a socket 8a of the hydraulic coupler 8 is attached to the other end. The tractor-side low-pressure pipe 13a is attached to the tractor 2 in an upright posture such that one end is at the lower end and the other end is at the upper end. Also, the tractor-side low-pressure pipe 13a has flexibility and can be deformed.

[0023] On one hand, one end of the trailer-side low-pressure pipe 13b is connected to the hydraulic motor 6 provided on the trailer 3, and the plug 8b of the hydraulic coupler 8 is attached to the other end. In FIG. 1, in order to avoid the trailer-side low-pressure pipe 13b intersecting with other members of the work vehicle 1 and becoming complicated, a part in the middle of the trailer-side low-pressure pipe 13b is shown broken.

[0024] The trailer-side low-pressure pipe 13b is attached to the trailer 3. The end of the trailer-side low-pressure pipe 13b to which the plug 8b of the hydraulic coupler 8 is attached is arranged at a high position (the installation height of the high-pressure pipe 12) near the end of the tractor-side low-pressure pipe 13a where the socket 8a of the hydraulic coupler 8 is provided. That is, the trailer-side low-pressure pipe 13b bends and extends vertically upward, and is connected to the branch portion 16 (lower connection portion 16c). And the tractor-side low-pressure pipe 13a and the trailer-side low-pressure pipe 13b having flexibility can be detachably connected by the hydraulic coupler 8 (socket 8a, plug 8b).

[0025] Also, a pressure absorption portion 9, which is a characteristic configuration of the present invention, is provided at a portion near the end of the trailer-side low-pressure pipe 13b where the plug 8b is provided. The pressure absorption portion 9 includes a branch portion 16 and a dead-end pipe 10.

[0026] The branch portion 16 is arranged at the highest position in the trailer-side low-pressure pipe 13b. That is, the branch portion 16 is arranged at a height position equal to or higher than that of the trailer-side high-pressure pipe 12b. In FIG. 1, the branch portion 16 is on the near side, the trailer-side high-pressure pipe 12b is on the far side, a part in the middle of the trailer-side high-pressure pipe 12b is shown broken, and the trailer-side high-pressure pipe 12b is depicted so as not to intersect with the branch portion 16. That is, for the convenience of illustration, the trailer-side high-pressure pipe 12b is shown broken, but actually the trailer-side high-pressure pipe 12b is continuous on the far side of the branch portion 16.

[0027] The branch portion 16 has a side connection portion 16a, an upper connection portion 16b, and a lower connection portion 16c. The branch portion 16 is provided in the middle of the trailer-side low-pressure pipe 13b, and a series of oil passages of the trailer-side low-pressure pipe 13b are formed through the side connection portion 16a and the lower connection portion 16c.

[0028] On the other hand, the dead-end pipe 10 of the pressure absorption portion 9 is a bottomed pipe member with one end open and the other end closed. The open end of one end of the dead-end pipe 10 is connected to the upper connection portion 16b of the branch portion 16, and the dead-end pipe 10 communicates with the trailer-side low-pressure pipe 13b through the branch portion 16. Further, the dead-end pipe 10 assumes an upright posture, and the closed-side end of the dead-end pipe 10 constitutes the upper end.

[0029] That is, the direction of the dead-end pipe 10 has an upward component, and the dead-end pipe 10 is arranged in an upright posture at the highest height position in the trailer-side low-pressure pipe 13b. Further, the dead-end pipe 10 is arranged at a height position higher than the trailer-side high-pressure pipe 12b.

[0030] As shown in FIG. 2(b), when the hydraulic coupler 7 (socket 7a, plug 7b) and the hydraulic coupler 8 (socket 8a, plug 8b) are connected, the hydraulic circuit 4 is formed.

[0031] In the work vehicle 1, the hydraulic pipes on the tractor 2 side (hydraulic source side) (tractor-side high-pressure pipe 12a, tractor-side low-pressure pipe 13a) and the hydraulic pipes on the trailer 3 side (hydraulic equipment side) (trailer-side high-pressure pipe 12b, trailer-side low-pressure pipe 13b) are connected via the hydraulic couplers 7 and 8, and the high-pressure side pipe 12 and the low-pressure side pipe 13 are formed.

[0032] Both pipes of the trailer-side high-pressure pipe 12b (discharge-side pipe) and the trailer-side low-pressure pipe 13b (recovery-side pipe) are substantially parallel, and the trailer-side high-pressure pipe 12b is arranged on the upper side and the trailer-side low-pressure pipe 13b is arranged on the lower side.

[0033] The hydraulic motor 6 is driven by the hydraulic oil supplied by the hydraulic pump 5. The hydraulic oil is supplied from the hydraulic pump 5 to the hydraulic motor 6 via the high-pressure pipe 12, and after driving the hydraulic motor 6, it is recovered into the tank 11 via the low-pressure pipe 13.

[0034] The hydraulic motor 6 drives the pump 17 (Fig. 2(b)) and sends the fuel in the fuel tank 14 to a storage tank (not shown) via the supply pipe 15.

[0035] In the hydraulic circuit 4 described above, for maintenance etc., as shown in Fig. 2(a), when the tractor-side high-pressure pipe 12a and the trailer-side high-pressure pipe 12b, and the tractor-side low-pressure pipe 13a and the trailer-side low-pressure pipe 13b are disconnected by the hydraulic couplers 7 and 8, the hydraulic oil is trapped in the trailer-side high-pressure pipe 12b, the hydraulic motor 6, and the trailer-side low-pressure pipe 13b.

[0036] Here, when the temperature is low when the hydraulic couplers 7 and 8 are disconnected and then the temperature rises, the hydraulic oil in the trailer-side high-pressure pipe 12b, the hydraulic motor 6, and the trailer-side low-pressure pipe 13b expands and the pressure in the pipes rises. As a result, there is concern that the oil seal etc. may be damaged and the hydraulic oil may leak.

[0037] However, in the work vehicle 1 of the present embodiment, a pressure absorption part 9 (dead-end pipe 10) is provided in the hydraulic circuit 4. There is no hydraulic oil in the dead-end pipe 10. That is, the air in the dead-end pipe 10 hardly leaks to the outside and is difficult to be replaced by the hydraulic oil. Therefore, the expanded hydraulic oil can enter the dead-end pipe 10. As a result, it is possible to avoid the hydraulic oil trapped in the trailer-side high-pressure pipe 12b, the hydraulic motor 6, and the trailer-side low-pressure pipe 13b from becoming high pressure. As a result, it is possible to prevent the trailer-side high-pressure pipe 12b, the hydraulic motor 6, and the trailer-side low-pressure pipe 1b from being damaged.

[0038] The dead-end pipe 10 is arranged at the highest height position among the trailer-side high-pressure pipe 12b (high-pressure-side pipe 12), the hydraulic motor 6, and the trailer-side low-pressure pipe 13b (low-pressure-side pipe 13). Therefore, the hydraulic oil does not enter the dead-end pipe 10 at normal pressure, and air is present in the dead-end pipe 10. Thus, when the hydraulic oil expands, the hydraulic oil can enter the dead-end pipe 10 while compressing the air in the dead-end pipe 10.

[0039] In the present embodiment, the pressure absorption part 9 includes the branch part 16 and the dead-end pipe 10, and an example in which the dead-end pipe 10 is connected to the upper connection part 16b provided above the branch part 16 has been described. The pressure absorption part 9 may take another form.

[0040] For example, the three connection parts (lateral connection part 16a, upper connection part 16b, lower connection part 16c) of the branch part 16 of the pressure absorption part 9 shown in FIG. 1 may be arranged such that all face the side (horizontal direction). In this case, the dead-end pipe may adopt, for example, a structure bent in an L shape. One side of the L shape faces the horizontal direction and is connected to and communicates with the branch part 16, and the other side of the L shape faces the vertical direction. The part of the L-shaped dead-end pipe facing the vertical direction is arranged at a position higher than the trailer-side high-pressure pipe 12b and the trailer-side low-pressure pipe 13b. That is, the height position of the dead-end pipe is set so that an air pocket is formed in the dead-end pipe.

[0041] As other hydraulic equipment on the trailer 3 side, there is also a support leg 19. The support leg 19 is also provided with a hydraulic pipe and a hydraulic cylinder (not shown). The support leg 19 can be driven by the hydraulic oil supplied from the hydraulic pump 5 to drive the hydraulic cylinder, and the support leg 19 can be extended and retracted in conjunction with the piston of the hydraulic cylinder. The support leg 19 can, for example, extend and contact the ground to support the front part of the trailer 3, or can be retracted and separated from the ground when the front part of the trailer 3 is supported by the tractor 2.

[0042] In the above, an example in which the pressure absorbing portion 9 is provided on the low-pressure side pipe 13 on the side that recovers the hydraulic oil has been shown. However, the pressure absorbing portion 9 may be provided on the high-pressure side pipe 12. Even in this case, the pressure absorbing portion 9 is arranged at the highest position in the hydraulic circuit 4.

[0043] FIG. 3 is a side view of a work vehicle 31 different from that in FIG. 1. The work vehicle 31 has a tractor 32 (transport vehicle; container transport vehicle) and a container 33 (cargo storage body). That is, the container 33 is mounted on the tractor 32, and the tractor 32 functions as a container transport vehicle. A hydraulic pump 35 which is a hydraulic source and a tank 41 are provided on the tractor 32 side. Further, a hydraulic motor 36 (hydraulic device) is provided on the container 33 side.

[0044] The hydraulic pump 35 and the tank 41 on the tractor 32 side and the hydraulic motor 36 on the container 33 side are provided on the hydraulic circuit 34. The hydraulic circuit 34 has a structure in which a tractor-side high-pressure pipe 42a (discharge-side pipe 42) on the tractor 32 side and a high-pressure pipe 42b (discharge-side pipe 42) on the container 33 side are detachably connected by a hydraulic coupler 37, and a tractor-side low-pressure pipe 43a (recovery-side pipe 43) on the tractor 32 side and a low-pressure pipe 43b (recovery-side pipe 43) on the container 33 side are detachably connected by a hydraulic coupler 38. That is, the hydraulic circuit 34 has the same structure as the hydraulic circuit 4 in FIGS. 1 and 2, and redundant descriptions are omitted.

[0045] The hydraulic motor 36 is driven by the hydraulic oil supplied from the hydraulic pump 35. The container 33 can be loaded and unloaded between the tractor 32 and the ground by a lifting device driven by the hydraulic motor 36.

[0046] The work vehicle can also be a dust collection vehicle that stores dust in a loading box (cargo storage body). The present invention can be implemented in various applications such as a dust compression device for packing dust into the loading box and a crushing device (shredder) for crushing large dust (objects to be crushed). The cargo storage body in which the present invention is implemented does not require the use of an expensive accumulator.

Explanation of Symbols

[0047] 1, 31 Work vehicle 2 Tractor (transport vehicle) 3 Trailer (cargo container) 4, 34 Hydraulic circuit 5, 35 Hydraulic pump (hydraulic source) 6, 36 Hydraulic motor (hydraulic equipment) 7, 8, 37, 38 Hydraulic coupler 7a, 8a Socket 7b, 8b Plug 9 Pressure absorption part 10 Dead-end pipe 12, 42 High-pressure side pipe (discharge side pipe) 13, 43 Low-pressure side pipe (recovery side pipe) 32 Tractor (transport vehicle) 33 Container (cargo container)

Claims

1. A cargo container transported by a transport vehicle, comprising a hydraulic power source on the transport vehicle side and hydraulic equipment driven by the hydraulic oil of the hydraulic power source on the cargo container, the hydraulic equipment being connected to the hydraulic power source via a discharge side pipe which is a high-pressure side pipe and a recovery side pipe which is a low-pressure side pipe, the discharge side pipe being separable into a hydraulic power source side high-pressure side pipe which is the discharge side pipe on the hydraulic power source side and a hydraulic equipment side high-pressure side pipe which is the discharge side pipe on the hydraulic equipment side, the recovery side pipe being separable into a hydraulic power source side low-pressure side pipe which is the recovery side pipe on the hydraulic power source side and a hydraulic equipment side low-pressure side pipe which is the recovery side pipe on the hydraulic equipment side, the hydraulic equipment side low-pressure side pipe extending vertically upward by bending or curving toward the hydraulic power source side low-pressure side pipe and being connected to a branch portion included in a pressure absorption portion, the pressure absorption portion absorbing the pressure of the hydraulic oil and having a dead-end pipe extending upward from the branch portion, a cargo container, characterized in that the branch portion is connected to the hydraulic equipment side low-pressure side pipe.

2. A cargo container transported by a transport vehicle, comprising a hydraulic power source on the transport vehicle side and hydraulic equipment driven by the hydraulic oil of the hydraulic power source on the cargo container, the hydraulic equipment being connected to the hydraulic power source via a discharge side pipe which is a high-pressure side pipe and a recovery side pipe which is a low-pressure side pipe including a pressure absorption portion, the discharge side pipe being separable into a hydraulic power source side high-pressure side pipe which is the discharge side pipe on the hydraulic power source side and a hydraulic equipment side high-pressure side pipe which is the discharge side pipe on the hydraulic equipment side, the recovery side pipe being separable into a hydraulic power source side low-pressure side pipe which is the recovery side pipe on the hydraulic power source side and a hydraulic equipment side low-pressure side pipe which is the recovery side pipe on the hydraulic equipment side, a cargo container, characterized in that a part of the recovery side pipe reaches the height position of the discharge side pipe by bending or curving.

3. The cargo container according to claim 1 or 2, characterized in that the two pipes are arranged such that the discharge side pipe is on the upper side and the recovery side pipe is on the lower side, and a pressure absorption portion is provided at a portion of the highest height position of the recovery side pipe.

4. The transport vehicle is a tractor or a container carrier vehicle, and the cargo container is a trailer towed by the tractor or a container mounted on the container carrier vehicle, characterized in that the cargo container is any one of claims 1 to 3.

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