Transport vehicles

Abstract

To provide a transport vehicle which travels by using electric power generated by a fuel battery and which can increase a cruising distance while securing a floor area for a space to be loaded with luggage.SOLUTION: A transport vehicle traveling using electric power generated by a fuel battery, comprises: a body including a luggage room space for loading luggage; a chassis frame disposed below the body and supporting the body; and a tank unit which includes a plurality of tanks storing fuel gas used for the fuel battery to generate the power, and connection parts connecting the plurality of tanks, and which tank unit is disposed between the luggage room space and the chassis frame.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to transportation vehicles. [Background technology]

[0002] Patent Document 1 discloses a work vehicle in which a plurality of hydrogen tanks that store hydrogen gas to be supplied to a fuel cell are stacked one on top of the other behind the driver's cab. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-128202 Summary of the Invention [Problem to be solved by the invention]

[0004] In general, transport vehicles such as trucks are required to have a large space for loading cargo, so that they can transport a large amount of cargo at one time, and to have a long cruising range. Transport vehicles powered by fuel cells are preferably equipped with multiple fuel gas tanks to ensure a long cruising range. However, if fuel gas tanks are stacked one above the other behind the driver's cab, as in the above-mentioned document, the floor area of the space for loading cargo becomes narrow. This narrow floor area may make it difficult to load long cargo or to efficiently load and unload cargo. [Means for solving the problem]

[0005] The present disclosure can be realized in the following forms. According to one aspect of the present disclosure, there is provided a transport vehicle that runs on electric power generated by a fuel cell. The transport vehicle includes a body having a luggage compartment space for carrying luggage, and a fuel cell battery mounted below the body and above the rotation axis of the wheels. onlyThe vehicle has a chassis frame that supports the body, a plurality of tanks that store fuel gas used for power generation by the fuel cell, and a connecting portion that connects the plurality of tanks, and is disposed between the luggage space and the chassis frame. only and a tank unit disposed therein. The present disclosure can also be realized in the following forms.

[0006] (1) According to one aspect of the present disclosure, there is provided a transport vehicle that runs on electricity generated by a fuel cell, the transport vehicle including: a body having a luggage compartment for carrying cargo; a chassis frame disposed below the body and supporting the body; and a tank unit disposed between the luggage compartment and the chassis frame, the tank unit having a plurality of tanks for storing fuel gas used to generate electricity in the fuel cell and a connecting portion for connecting the plurality of tanks. According to this type of transport vehicle, the tank unit is disposed between the luggage compartment space and the chassis frame, which allows the amount of fuel gas carried to be increased without reducing the floor area of the luggage compartment space, thereby extending the cruising range. (2) In the transport vehicle of the above aspect, the tank unit may be disposed between the bottom surface of the body and the upper surface of the chassis frame. According to this type of transport vehicle, in a configuration in which the tank unit is arranged outside the body, the amount of fuel gas carried can be increased without reducing the floor area of the luggage compartment, thereby increasing the cruising range. (3) In the transport vehicle of the above aspect, the body may have a tank accommodating space below the luggage compartment space, and the tank unit may be disposed in the tank accommodating space. According to this type of transport vehicle, in a configuration in which the tank unit is arranged inside the body, the amount of fuel gas carried can be increased without reducing the floor area of the luggage compartment space, thereby increasing the cruising range. (4) In the transport vehicle of the above aspect, the plurality of tanks may each have a cylindrical portion, and the cylindrical portions of the plurality of tanks may have the same outer diameter. According to this type of transport vehicle, the manufacturing costs of the tank unit can be reduced compared to a type in which the cylindrical portions of the tanks have different outer diameters. (5) In the transport vehicle of the above aspect, the plurality of tanks may each have a cylindrical portion, and the cylindrical portions of the plurality of tanks may be arranged in parallel. With this type of transport vehicle, the tanks can be arranged closer together than in a type in which the cylindrical portions of the tanks are arranged in irregular directions, thereby more effectively increasing the amount of fuel gas that can be carried. (6) The transport vehicle of the above aspect may include a cooling device that cools the luggage compartment space. In this type of transport vehicle, as the fuel gas stored in the tank is consumed, the internal pressure of the tank drops, causing the tank temperature to drop and absorb heat from the surrounding area, thereby preventing heat from being transferred from the floor of the luggage compartment into the luggage compartment, thereby reducing the power consumption of the cooling device. (7) The transport vehicle of the above form may be equipped with a slide mechanism that moves the tank unit between a first position and a second position, the first position being a position where the tank unit is positioned when the fuel gas is supplied from the tank unit to the fuel cell, and the second position being a position where the tank unit is positioned when the tank unit is attached to the transport vehicle or when the tank unit is removed from the transport vehicle. According to the transport vehicle of this aspect, the tank unit can be moved between the first position and the second position by the slide mechanism, which makes it easy to replace the tank unit. The present disclosure can also be realized in various forms other than transportation vehicles, such as fuel cell vehicles. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a side view showing a schematic configuration of a transport vehicle according to a first embodiment. [Figure 2] FIG. 2 is a perspective view showing the configuration of a tank unit according to the first embodiment. [Figure 3]FIG. 10 is a side view showing a schematic configuration of a transport vehicle according to a second embodiment. [Figure 4] FIG. 11 is a first top view showing a schematic configuration of a slide mechanism according to a third embodiment. [Figure 5] FIG. 11 is a second top view showing a schematic configuration of the slide mechanism of the third embodiment. [Figure 6] FIG. 10 is a perspective view showing the configuration of a tank unit according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0008] A. First embodiment: Fig. 1 is a side view showing a schematic configuration of a transport vehicle 10 in the first embodiment. Fig. 1 shows arrows indicating mutually orthogonal X, Y, and Z directions. The X direction is the front-to-rear direction of the transport vehicle 10, the Y direction is the width direction of the transport vehicle 10, and the Z direction is the height direction of the transport vehicle 10. The arrows indicating the X, Y, and Z directions are also shown in other figures as appropriate so that the illustrated directions correspond to those in Fig. 1.

[0009] The transport vehicle 10 is equipped with a fuel cell 50 and runs on electricity generated by the fuel cell 50. In this embodiment, the transport vehicle 10 is configured as a refrigerated truck that transports frozen cargo, and includes a cab 20, a body 30, a chassis frame 40, and a cooling device 80. The transport vehicle 10 may also be configured as a refrigerated truck that transports refrigerated cargo.

[0010] The cab 20 is provided with a driver's seat 25 for a driver or the like to sit in. The transport vehicle 10 may be configured to be capable of running by remote control by an operator or the like, or may be configured to be capable of running by automatic driving without being operated by a driver or operator or the like.

[0011] The body 30 is disposed behind the cab 20. The body 30 has a luggage compartment space 31 for carrying luggage. In this embodiment, the body 30 is configured as a box-shaped van body having a ceiling surface. More specifically, the body 30 is configured as a refrigerated container in which thermal insulation is provided on the ceiling surface, side wall surfaces, and floor surfaces that define the luggage compartment space 31.

[0012] The cooling device 80 is provided so as to protrude above the cab 20 from the front surface of the body 30. The cooling device 80 is composed of a compressor that compresses and liquefies gaseous refrigerant, a condenser that cools the high-temperature, high-pressure refrigerant compressed by the compressor with outside air, and an evaporator that vaporizes the refrigerant cooled by the condenser to absorb heat within the luggage compartment space 31, thereby cooling the luggage compartment space 31. The cooling device 80 is fixed to the front surface of the body 30 with bolts or the like.

[0013] The chassis frame 40 is disposed below the driver's seat 25 and the body 30. The chassis frame 40 is composed of a pair of side members arranged along the front-rear direction X and multiple cross members arranged between the side members along the width direction Y. The side members and the cross members are fixed to each other by welding, bolts, etc. The cab 20, the body 30, and the fuel cell 50 are fixed to the chassis frame 40 by bolts, etc., and the chassis frame 40 supports these. In addition, driving wheels 41 and driven wheels 42 are connected to the chassis frame 40 via suspensions.

[0014] The fuel cell 50 is disposed below the driver's seat 25. The fuel cell 50 generates electricity through an electrochemical reaction between fuel gas and oxidizing gas. In this embodiment, the fuel cell 50 is a polymer electrolyte fuel cell, and generates electricity by receiving a supply of hydrogen gas as the fuel gas and air as the oxidizing gas. The hydrogen gas supplied to the fuel cell 50 is supplied from a tank unit 60, which will be described later. The air supplied to the fuel cell 50 is supplied, for example, from a compressor mounted on the transport vehicle 10. The supply of hydrogen gas and air to the fuel cell 50 is controlled by an ECU (Electronic Control Unit) mounted on the transport vehicle 10. The fuel cell 50 may be a solid oxide fuel cell instead of a polymer electrolyte fuel cell.

[0015] The tank units 60 are arranged between the luggage compartment space 31 of the body 30 and the chassis frame 40. In this embodiment, three tank units 60 are arranged side by side in the front-rear direction X. Each tank unit 60 has the same configuration. Each tank unit 60 is configured to be able to store hydrogen gas at a high pressure of, for example, 35 MPa or 70 MPa. Each tank unit 60 is connected to the fuel cell 50 by a hydrogen supply pipe. The hydrogen supply pipe is provided with a pressure reducing valve that reduces the pressure of the hydrogen gas supplied from each tank unit 60 to a predetermined pressure, and an injector that injects the reduced pressure hydrogen gas toward the fuel cell 50. The number of tank units 60 arranged between the luggage compartment space 31 of the body 30 and the chassis frame 40 is not limited to three, and may be one, two, or four or more. The specific configuration of each tank unit 60 will be described later.

[0016] In this embodiment, each tank unit 60 is housed in a tank case 70 that is arranged between the bottom surface of the body 30 and the top surface of the chassis frame 40. The tank case 70 is configured in a box shape, and heat insulating materials are provided on the ceiling surface, side wall surfaces, and floor surface of the tank case 70. The ceiling surface of the tank case 70 is in contact with the bottom surface of the body 30. Each tank unit 60 is fixed to the tank case 70 with bolts or the like. The tank case 70 is fixed to the chassis frame 40 with bolts or the like. It should be noted that the tank unit 60 may be fixed directly to the chassis frame 40 without being housed in the tank case 70.

[0017] The traction motor 45 is fixed to the chassis frame 40. The traction motor 45 is driven using electric power generated by the fuel cell 50 to rotate the drive wheels 41. The rotation of the drive wheels 41 causes the transport vehicle 10 to travel. The electric power generated by the fuel cell 50 is supplied to the traction motor 45 from the fuel cell 50 via a DC / DC converter, an inverter, or the like. Note that a secondary battery or a capacitor may be mounted on the transport vehicle 10, and the electric power generated by the fuel cell 50 may be stored in the secondary battery or the capacitor before being supplied to the traction motor 45. The traction motor 45 may not be fixed to the chassis frame 40, but may be provided on the drive wheels 41 as an in-wheel motor.

[0018] FIG. 2 is a perspective view showing the configuration of the tank unit 60 according to this embodiment. In this embodiment, the tank unit 60 includes a plurality of tanks 61, a first connecting portion 62, a second connecting portion 63, and a main stop valve 65. In this embodiment, the tank unit 60 includes twelve tanks 61, which are arranged side by side in the front-rear direction X. Each tank 61 includes a cylindrical portion 67 having a cylindrical shape centered on a central axis CL, a first end portion 68 connected to one end of the cylindrical portion 67 and having a substantially hemispherical or substantially conical shape centered on the central axis CL, and a second end portion 69 connected to the other end of the cylindrical portion 67 and having a substantially hemispherical or substantially conical shape centered on the central axis CL. The tanks 61 have the same shape and dimensions. The tanks 61 are arranged parallel to each other with their central axes CL aligned along the width direction Y. The tanks 61 are arranged so that their central axes CL lie on the same plane. The length of each tank 61 in the width direction Y is shorter than the length of the body 30 in the width direction Y. The number of tanks 61 provided in the tank unit 60 is not limited to 12, but may be 2 to 11, or may be 13 or more. Each tank 61 may be arranged such that the central axis CL is aligned with the front-rear direction X.

[0019] Each tank 61 is composed of a liner made of a resin material having gas barrier properties against hydrogen gas, a reinforcing layer bonded to the outer surface of the liner, and a protective layer bonded to the outer surface of the reinforcing layer. The liner is made of a resin material such as polyethylene, nylon, or polypropylene. The liner may be made of the above-mentioned resin material to which a hydrogen storage alloy has been added, or may be made of a metal material such as an aluminum alloy or stainless steel instead of a resin material. The reinforcing layer is made of, for example, a carbon fiber reinforced resin, and the protective layer is made of, for example, a glass fiber reinforced resin. The reinforcing layer and the protective layer can each be formed using a filament winding method.

[0020] First ends 68 of the tanks 61 are connected by a first connecting portion 62. Second ends 69 of the tanks 61 are connected by a second connecting portion 63. The first connecting portion 62 and the second connecting portion 63 are fixed to the tank case 70 with bolts or the like. A communication flow path 64 that connects the tanks 61 is provided within the first connecting portion 62. The communication flow path 64 is connected to a hydrogen supply pipe via a main stop valve 65 provided at one end of the first connecting portion 62. When the main stop valve 65 is opened, hydrogen gas stored in each tank 61 is supplied to the hydrogen supply pipe, and when the main stop valve 65 is closed, the supply of hydrogen gas to the hydrogen supply pipe is stopped.

[0021] According to the transport vehicle 10 of the present embodiment described above, the tank unit 60 disposed between the bottom surface of the body 30 and the upper surface of the chassis frame 40 can increase the amount of hydrogen gas that can be carried without reducing the floor area of the luggage compartment space 31. Therefore, the cruising range of the transport vehicle 10 can be increased while ensuring the floor area of the luggage compartment space 31. In particular, in a transport vehicle 10 having a cooling device 80 that protrudes above the cab 20 from the front surface of the body 30 as in the present embodiment, even if the length of the body 30 in the fore-and-aft direction X is shortened to provide a space for installing the tank unit 60 between the cab 20 and the body 30, the cooling device 80 restricts the upward installation of the tank unit 60. In the present embodiment, a space for installing the tank unit 60 is provided between the bottom surface of the body 30 and the upper surface of the chassis frame 40, rather than between the cab 20 and the body 30, so the tank unit 60 can be installed without being restricted by the cooling device 80. Therefore, the amount of hydrogen gas that can be carried can be increased more effectively than in a configuration in which a space for mounting the tank unit 60 is provided between the cab 20 and the body 30. Furthermore, in this embodiment, the tank unit 60 is disposed between the bottom surface of the body 30 and the upper surface of the chassis frame 40, so that the change in the center of gravity of the transport vehicle 10 due to consumption of hydrogen gas can be reduced compared to a configuration in which multiple tanks 61 are disposed stacked vertically between the cab 20 and the body 30.

[0022] Furthermore, in this embodiment, the cylindrical portions 67 of the tanks 61 constituting the tank unit 60 have the same outer diameter, which reduces the manufacturing cost of the tank unit 60 compared to a configuration in which the cylindrical portions 67 of the tanks 61 have different outer diameters. In particular, in this embodiment, the tanks 61 constituting the tank unit 60 have the same shape and dimensions, which further reduces the manufacturing cost of the tank unit 60.

[0023] In addition, in this embodiment, the cylindrical portions 67 of the tanks 61 constituting the tank unit 60 are arranged in parallel, so the tanks 61 can be arranged closer together than in a configuration in which the cylindrical portions 67 of the tanks 61 are arranged in irregular directions. This makes it possible to more effectively increase the amount of fuel gas that can be carried.

[0024] Furthermore, in this embodiment, as hydrogen gas stored in each tank 61 housed in a tank case 70 provided with thermal insulation is consumed in the power generation of the fuel cell 50, the internal pressure of each tank 61 drops, the surface temperature of each tank 61 drops, and the tank 61 absorbs heat from the surrounding area, making it possible to maintain the temperature inside the tank case 70 lower than the outside air temperature. Because the top surface of the tank case 70 is in contact with the bottom surface of the body 30, it is possible to prevent heat from being transferred from the bottom surface of the body 30, which forms the floor of the luggage space 31, into the luggage space 31. This reduces the power consumption of the cooling device 80.

[0025] B. Second embodiment: 3 is a side view showing a schematic configuration of a transport vehicle 10b in the second embodiment. The second embodiment differs from the first embodiment in that the tank unit 60 is disposed inside the body 30b. The other configurations are the same as those in the first embodiment unless otherwise specified.

[0026] In this embodiment, the body 30b has a luggage compartment space 31b and a tank accommodating space 32 provided below the luggage compartment space 31b. The tank unit 60 is disposed in the tank accommodating space 32. The luggage compartment space 31b and the tank accommodating space 32 are separated by a floor panel 33 provided with a heat insulating material. Note that in this embodiment, the tank case 70 shown in FIG. 1 is not provided between the bottom surface of the body 30b and the upper surface of the chassis frame 40.

[0027] According to the transport vehicle 10b of this embodiment described above, the interior of the body 30b is divided into upper and lower sections by the floor panel 33, so that a luggage space 31b for loading luggage and a tank storage space 32 for storing the tank unit 60 can be provided within the body 30b. This makes it easier to optimize the arrangement of the tank unit 60 in accordance with the shape of the body 30b.

[0028] C. Third embodiment: Fig. 4 is a first top view showing a schematic configuration of a slide mechanism 90 provided in a transport vehicle 10c in the third embodiment. Fig. 5 is a second top view showing a schematic configuration of a slide mechanism 90 provided in a transport vehicle 10c in the third embodiment. The third embodiment differs from the first embodiment in that the transport vehicle 10c is provided with a slide mechanism 90 that moves the tank unit 60c. Unless otherwise specified, the other configurations are the same as those in the first embodiment.

[0029] FIG. 4 shows the tank unit 60c disposed at a first position P1, and FIG. 5 shows the tank unit 60c disposed at a second position P2. The first position P1 is the position where the tank unit 60c is disposed when hydrogen gas is supplied from the tank unit 60c to the fuel cell 50, and the second position P2 is the position where the tank unit 60c is disposed when the tank unit 60c is attached to the transport vehicle 10c or when the tank unit 60c is removed from the transport vehicle 10c. In this embodiment, the second position P2 is the same position as the first position P1 in the front-rear direction X and the height direction Z, but is a different position from the first position P1 in the width direction Y. The tank unit 60c is disposed within the tank case 70c at the first position P1, and is disposed so that a portion of the tank unit 60c protrudes from the tank case 70c at the second position P2.

[0030] The slide mechanism 90 moves the tank unit 60c between a first position P1 and a second position P2. In this embodiment, the slide mechanism 90 is configured with two air cylinders 91 arranged at the front and rear of the tank unit 60. Each air cylinder 91 expands and contracts along the Y direction. A fixing portion 92 is provided at the tip of the air cylinder 91. The tank unit 60c is fixed to the fixing portion 92 with a bolt, a band, or the like. Each air cylinder 91 is controlled by an ECU (Electronic Control Unit) mounted on the transport vehicle 10c. Note that the slide mechanism 90 may be configured with a hydraulic cylinder instead of the air cylinder 91, or may be configured by a combination of gears, belts, a motor, and the like.

[0031] In this embodiment, fixed portions 66 that are fixed to the fixing portions 92 of the air cylinder 91 are provided at both ends of the first connecting portion 62c of the tank unit 60c. The tank unit 60c is not fixed to the tank case 70c, but is fixed to the fixing portions 92 of the air cylinder 91. The main stop valve 65c is provided in a location different from the fixed portions 66. The configurations of each tank 61 and the second connecting portion 63 are the same as in the first embodiment. An opening / closing portion 71 is provided on the side wall surface of the tank case 70c.

[0032] When the tank unit 60c is attached to the transport vehicle 10c, the tank unit 60c is placed at the second position P2, and the fixed portion 66 of the tank unit 60c is fixed to the fixing portion 92 of the slide mechanism 90. The slide mechanism 90 is then driven to move the tank unit 60c from the second position P2 to the first position P1. After the tank unit 60c has moved to the first position P1, a hydrogen supply pipe is attached to the main stop valve 65c, enabling hydrogen gas to be supplied from the tank unit 60c to the fuel cell 50. The opening / closing portion 71 of the tank case 70c is then closed after the hydrogen supply pipe is connected to the main stop valve 65c. On the other hand, when the tank unit 60c is removed from the transport vehicle 10c, the opening / closing portion 71 of the tank case 70c is opened to disconnect the main stop valve 65c from the hydrogen supply pipe. The slide mechanism 90 is then driven to move the tank unit 60c from the first position P1 to the second position P2. After the tank unit 60c has moved to the second position P2, the fixed portion 66 and the fixing portion 92 are released from each other, thereby making it possible to remove the tank unit 60c from the transport vehicle 10c.

[0033] According to the transport vehicle 10c of the present embodiment described above, by driving the slide mechanism 90 to move the tank unit 60c between the first position P1 and the second position P2, the work of replacing the tank unit 60c using, for example, a forklift can be simplified. In particular, in a transport vehicle 10c transporting frozen cargo, as in this embodiment, when refilling the tank unit 60c with hydrogen gas, the temperature of the tank 61 increases due to an increase in the internal pressure of the tank 61, which may result in an increase in the temperature of the cargo space 31. In this embodiment, the tank unit 60c attached to the transport vehicle 10c can be easily replaced with another tank unit 60c filled with hydrogen gas using the slide mechanism 90 without refilling it with hydrogen gas. This prevents the temperature of the cargo space 31 from increasing, allowing the tank unit 60c to be replaced in a short time and resume transporting cargo. This embodiment and the second embodiment may be combined. For example, the slide mechanism 90 described above may be provided on the body 30b of the transport vehicle 10b of the second embodiment shown in FIG. 3. In this case, an opening / closing portion 71 may be provided on the side wall surface of the tank accommodating space 32 of the body 30b.

[0034] D. Fourth embodiment: Fig. 6 is a perspective view showing the configuration of a tank unit 60d provided in a transport vehicle 10d in the fourth embodiment. Fig. 6 shows only the tank unit 60d, and the body 30, chassis frame 40, etc. are not shown. In the fourth embodiment, the shape of the tank unit 60d is different from that of the first embodiment. The other configurations are the same as those of the first embodiment unless otherwise specified.

[0035] In this embodiment, the transport vehicle 10d is equipped with one tank unit 60d. The tanks 61d constituting the tank unit 60d are arranged in parallel such that their central axes CL are aligned in the longitudinal direction X. The cylindrical portion 67d of each tank 61d is configured to be longer than the cylindrical portion 67 of the tank 61 of the first embodiment shown in FIG. 2. The configurations of the first end portion 68 and the second end portion 69 are the same as those in the first embodiment. The length of each tank 61d in the longitudinal direction X is longer than the length of the body 30 in the width direction Y and is approximately the same as the length of the body 30 in the longitudinal direction X.

[0036] According to the transport vehicle 10d of this embodiment described above, the tank unit 60d makes it possible to increase the amount of hydrogen gas that can be carried without reducing the floor area of the luggage compartment space 31.

[0037] E. Other Embodiments: (E1) The transport vehicles 10 to 10d in each of the above-described embodiments are configured as trucks. Alternatively, the transport vehicles 10 to 10d may be configured as tractors towed by a trailer. In this case, the fuel cell 50 may be mounted on the trailer or the tractor. In addition, in this case, the tank units 60, 60c, 60d may be mounted on the trailer or the tractor.

[0038] (E2) In the transport vehicles 10 to 10d of the above-described embodiments, the tanks 61, 61c, 61d constituting the tank units 60, 60c, 60d have the same outer diameter. However, the tanks 61, 61c, 61d may have different outer diameters.

[0039] (E3) In the transport vehicles 10 to 10d of the above-described embodiments, the tanks 61, 61c, 61d constituting the tank units 60, 60c, 60d are arranged so that their central axes CL are parallel to each other. However, the tanks 61, 61c, 61d do not have to be arranged so that their central axes CL are parallel to each other.

[0040] (E4) The transport vehicles 10 to 10d in each of the above-described embodiments are equipped with a cooling device 80. In contrast, the transport vehicles 10 to 10d may not be equipped with a cooling device 80. In this case, the body 30, 30b may be configured as a van body other than a refrigerated container, may be configured as a flat body without a ceiling, or may be configured as a wing body whose side walls open and close. A crane may be provided on the body 30, 30b.

[0041] (E5) In the transport vehicle 10c of the third embodiment described above, the second position P2 is the same as the first position P1 in the front-rear direction X and the height direction Z, and is a different position from the first position P1 in the width direction Y. In contrast, the second position P2 may be the same as the first position P1 in the width direction Y and the height direction Z, and may be a position behind the first position P1 in the front-rear direction X. In this case, the slide mechanism 90 may be configured by an air cylinder or the like that expands and contracts along the X direction.

[0042] The present disclosure is not limited to the above-described embodiments and can be realized in various configurations without departing from the spirit thereof. For example, the technical features in the embodiments corresponding to the technical features in each aspect described in the Summary of the Invention section can be appropriately replaced or combined to solve some or all of the above-described problems or achieve some or all of the above-described effects. Furthermore, if a technical feature is not described as essential in this specification, it can be appropriately deleted. [Explanation of symbols]

[0043] 10...Transport vehicle, 20...Cab, 25...Driver's seat, 30...Body, 31...Luggage space, 32...Tank storage space, 33...Floor panel, 40...Chassis frame, 41...Drive wheel, 42...Driven wheel, 45...Travel motor, 50...Fuel cell, 60...Tank unit, 61...Tank, 62...First connecting portion, 63...Second connecting portion, 64...Communicating flow path, 65...Main stop valve, 66...Fixed portion, 67...Cylindrical portion, 68...First end, 69...Second end, 70...Tank case, 71...Opening and closing portion, 80...Cooling device, 90...Slide mechanism, 91...Air cylinder, 92...Fixed portion

Claims

1. A transport vehicle that runs on electricity generated by a fuel cell, a body having a luggage compartment space for carrying luggage; a chassis frame that is disposed below the body and above only the rotational axes of the wheels and supports the body; a tank unit including a plurality of tanks for storing fuel gas used for power generation by the fuel cell and a connecting portion for connecting the plurality of tanks, the tank unit being disposed only between the luggage compartment space and the chassis frame; A transport vehicle comprising:

2. 10. The transport vehicle of claim 1, A transport vehicle, wherein the tank unit is disposed between the bottom surface of the body and the top surface of the chassis frame.

3. 10. The transport vehicle of claim 1, The body has a tank accommodating space below the luggage compartment space, A transport vehicle, wherein the tank unit is disposed in the tank accommodating space.

4. A transport vehicle according to any one of claims 1 to 3, Each of the plurality of tanks has a cylindrical portion, A transport vehicle, wherein the cylindrical portions of the plurality of tanks have the same outer diameter.

5. A transport vehicle according to any one of claims 1 to 4, Each of the plurality of tanks has a cylindrical portion, A transport vehicle, wherein the cylindrical portions of the plurality of tanks are arranged in parallel.

6. A transport vehicle according to any one of claims 1 to 5, A transportation vehicle comprising a cooling device for cooling the luggage compartment space.

7. A transport vehicle according to any one of claims 1 to 6, a slide mechanism that moves the tank unit between a first position and a second position; the first position is a position where the tank unit is disposed when the fuel gas is supplied from the tank unit to the fuel cell, A transport vehicle, wherein the second position is a position where the tank unit is placed when the tank unit is attached to the transport vehicle or when the tank unit is removed from the transport vehicle.

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