Railway vehicles and their manufacturing methods

Abstract

To provide a railway vehicle equipped with a bulkhead member that encloses a gas conduit and airtightly separates it from the passenger compartment, and which can be easily welded to a floor plate having a gas conduit penetration hole formed near the side outer plate, and a method for manufacturing the railway vehicle. [Solution] The railway vehicle 10 is equipped with a gas conduit 4 disposed between a high-pressure gas container 1 mounted on a roof plate YK1 that constitutes a roof structure YK and a gas usage device 3 installed below a floor plate 2 that constitutes a frame DW. A through hole 21 is formed in the floor plate 2 near the side outer plate GK1 that constitutes a side structure GK, through which the gas conduit passes. Inside the vehicle body ST, a hollow bulkhead member 6 is provided, welded to the floor plate around the through hole, surrounding the gas conduit and airtightly separating it from the passenger compartment 5. The bulkhead member is equipped with a welding opening 611 in the hollow part 6T of the bulkhead member that opens towards the passenger compartment at a position close to the through hole, and a cover part 62 welded to the opening from the passenger compartment side.

Description

Technical Field

[0001] The present invention relates to a railway vehicle and a method for manufacturing the same. More specifically, the present invention relates to a railway vehicle provided with a partition member that surrounds a gas conduit disposed between a high-pressure gas container mounted on a roof and a gas-using device installed under a floor and that partitions the passenger compartment in an airtight manner, and a method for manufacturing the railway vehicle.

Background Art

[0002] Generally, railway vehicles used in non-electrified sections include diesel vehicles that run on diesel engines and hybrid vehicles that switch between a diesel engine and an electric motor to run. However, such railway vehicles have problems such as exhaust gas problems and an increase in vehicle mass because they use diesel engines that burn light oil or the like. Therefore, in recent years, railway vehicles that run on the power of fuel cells, which are less likely to cause exhaust gas problems and can be lightweight, have attracted attention.

[0003] In addition, natural gas mainly consists of methane and contains almost no impurities such as harmful carbon monoxide. The amounts of nitrogen oxides and carbon dioxide generated when it burns are less than those of light oil or the like, and almost no sulfur oxides are generated. Therefore, natural gas is said to be an energy source friendly to the environment. For this reason, railway vehicles that run on natural gas have also attracted attention.

[0004] For example, Patent Document 1 discloses a railway vehicle 100 equipped with a fuel cell 101 that generates electricity by reacting hydrogen and oxygen, and a hydrogen tank 102 that stores hydrogen supplied to the fuel cell 101, as shown in Figure 12. The railway vehicle 100 is equipped with a switching device 106 that switches between a state in which power supplied from the overhead line 104 via a pantograph 103 is supplied to the drive unit 105 and a state in which power generated by the fuel cell 101 is supplied to the drive unit 105. In the above railway vehicle 100, if the hydrogen tank 102 is placed on the roof and the fuel cell 101 is placed under the floor, it was necessary to supply high-pressure hydrogen gas stored in the hydrogen tank 102 to the fuel cell 101 side via a gas conduit. Similarly, if a natural gas tank is placed on the roof and a natural gas-fueled engine is placed under the floor, it was necessary to supply high-pressure natural gas to the engine side via a gas conduit, just as with hydrogen gas. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2005-65398 [Overview of the project] [Problems that the invention aims to solve]

[0006] However, gas pipelines carrying hydrogen gas or natural gas at high pressures of 1 MPa or more are subject to the High Pressure Gas Safety Act. Therefore, based on the interpretation standards of the ministerial ordinance, except for those installed outside the vehicle body, they had to be separated from the passenger compartment with seats or standing room by an airtight partition and installed in a location with sufficient ventilation from the outside of the vehicle body.

[0007] In this regard, a structure in which the gas conduit is attached to the outside of the vehicle body is not desirable because it may cause damage to the gas conduit and has aesthetic problems. Therefore, in order to consider a structure in which the gas conduit is attached to the inside of the vehicle body, and in order to ensure airtightness with the passenger compartment and improve space efficiency inside the passenger compartment, a structure was conceived in which the gas conduit is placed near the side outer panel that constitutes the side structure, and a bulkhead member is provided inside the vehicle body to surround the gas conduit and airtightly separate it from the passenger compartment.

[0008] In this case, one possible approach is to join the bulkhead member to the floor plate, which has a through-hole for the gas conduit near the side outer plate, via a sealing material. However, there was a possibility that the airtightness would decrease as the sealing material deteriorated over time. Therefore, as an airtightness measure that would be less affected by aging, we considered a method of welding the bulkhead member to the floor plate, which has a through-hole for the gas conduit, from its outer periphery. However, even with this method, there was a problem in that the side outer plate adjacent to the bulkhead member got in the way, making the welding work difficult.

[0009] The present invention has been made to solve the above problems, and aims to provide a railway vehicle equipped with a bulkhead member that surrounds a gas conduit and airtightly separates it from the passenger compartment, and which can be easily welded to a floor plate having a gas conduit penetration hole formed near the side outer plate, and a method for manufacturing the railway vehicle. [Means for solving the problem]

[0010] To achieve the above objective, the railway vehicle and its manufacturing method according to the present invention have the following configuration. (1) A railway vehicle equipped with a gas conduit arranged between a high-pressure gas container mounted on a roof panel constituting the roof structure and a gas usage device installed below the floor panel constituting the underframe, The floor plate has through-holes formed near the side outer plates that constitute the side structure, through which the gas conduits pass. The vehicle body is provided with a hollow bulkhead member that is welded to the floor plate around the through-hole, enclosing the gas conduit and airtightly separating it from the passenger compartment. The partition wall member is characterized by comprising, at a position close to the through hole, an opening for welding work in which the hollow portion of the partition wall member opens toward the passenger compartment side, and a cover portion welded to the opening from the passenger compartment side.

[0011] In this invention, the floor plate has through-holes formed near the side outer panels that constitute the side structure through which gas conduits pass. Inside the vehicle body, a hollow bulkhead member is provided, welded to the floor plate around the through-holes, surrounding the gas conduits and airtightly separating them from the passenger compartment. Therefore, in accordance with the interpretation standards of the ministerial ordinance under the High-Pressure Gas Safety Act, the gas conduits can be airtightly separated from the passenger compartment by the bulkhead member. Furthermore, ventilation is possible between the hollow portion of the bulkhead member and the outside of the vehicle body through the through-holes in the floor plate, preventing gas from accumulating in the hollow portion of the bulkhead member. In addition, since the through-holes for the gas conduits are formed near the side outer panels, the bulkhead member surrounding the gas conduits is less likely to protrude into the passenger compartment, improving the space efficiency of the passenger compartment.

[0012] Furthermore, since the bulkhead member is equipped with a welding opening in the hollow portion of the bulkhead member that opens towards the passenger compartment at a position close to the through hole, and a cover portion welded to the opening from the passenger compartment side, the welding area for welding the floor plate and the bulkhead member can be divided with the opening as the boundary into a welding area on the inner circumference side of the bulkhead member that is close to the side outer plate, and a welding area on the outer circumference side of the bulkhead member that is spaced away from the side outer plate and close to the passenger compartment, thereby making it easy to weld the floor plate and the bulkhead member as a whole.

[0013] In other words, within the welding area for welding the floor plate and the bulkhead member, with the opening as the boundary, in the welding area on the inner circumference side of the bulkhead member that is close to the side outer plate, the floor portion of the floor plate with the through hole formed therein, and the inner circumference side of the bulkhead member excluding the opening, can be easily welded from the inside of the bulkhead member by inserting a welding torch into the hollow part of the bulkhead member through a welding work opening that opens towards the passenger compartment. Furthermore, within the welding area for welding the floor plate and the bulkhead member, with the opening as the boundary, in the welding area on the outer circumference side of the bulkhead member that is spaced away from the side outer plate and close to the passenger compartment, the floor portion of the floor plate with the through hole formed therein, and the bulkhead member or lid excluding the opening, can be easily welded from the outside of the bulkhead member or lid, and the opening and the lid can be easily welded from the outside of the bulkhead member.

[0014] Therefore, the floor plate, which has through-holes formed near the side outer plate through which gas conduits pass, and the hollow bulkhead member, which is welded to the floor plate around the through-holes and surrounds the gas conduits to airtightly separate them from the passenger compartment, can be divided into a welding area on the inner circumference of the bulkhead member that is close to the side outer plate and a welding area on the outer circumference of the bulkhead member that is spaced away from the side outer plate and close to the passenger compartment, with the opening as the boundary, and the entire welding area can be easily welded in a continuous state.

[0015] Therefore, it is possible to provide a railway vehicle equipped with a bulkhead member that surrounds the gas conduit and airtightly separates it from the passenger compartment, and which can be easily welded to a floor plate having a gas conduit penetration hole formed near the side outer plate.

[0016] (2) In the railway vehicles described in (1), The bulkhead member is formed as a flat, cylindrical body that is long in the vehicle's longitudinal direction and short in the vehicle's width direction, and the opening is characterized by being open with a predetermined vertical width from the front end to the rear end in the vehicle's longitudinal direction within the cylindrical body.

[0017] In this invention, the bulkhead member is formed as a flat cylindrical body that is long in the vehicle's longitudinal direction and short in the vehicle's width direction, so that it can accommodate multiple gas conduits (for example, a supply gas conduit and a filling gas conduit). Therefore, the space efficiency of the vehicle's interior can be improved by increasing the space for accommodating the gas conduits within the bulkhead member while reducing the amount of protrusion of the bulkhead member toward the vehicle interior. Furthermore, since the bulkhead member is formed as a flat cylindrical body that is long in the vehicle's longitudinal direction and short in the vehicle's width direction, the welding length of the welding area on the inner circumference side of the bulkhead member that is close to the side outer plate increases within the welding area for welding the floor plate and the bulkhead member. However, since the opening is open with a predetermined vertical width from the front end to the rear end in the vehicle's longitudinal direction within the cylindrical body, a welding torch can be inserted into the hollow part of the bulkhead member from the opening, and the floor portion near the side outer plate and the inner circumference portion of the bulkhead member near the side outer plate, excluding the opening, can be easily welded from the inside of the bulkhead member.

[0018] (3)(2) In the railway vehicles described above, The opening is characterized in that it is located near the upper part of the lower end of the cylindrical body and extends from the front end to the rear end of the cylindrical body with a predetermined vertical width.

[0019] In this invention, the opening is located near the upper part of the lower end of the cylindrical body and extends from the front end to the rear end of the cylindrical body with a predetermined vertical width. This allows the entire lower end of the cylindrical body to be in contact with the floor plate, enabling easy and stable welding of the floor plate and the cylindrical body. Furthermore, since the entire circumference of the lower end of the cylindrical body is connected, the rigidity around the opening of the cylindrical body is improved, allowing for easy and accurate welding of the opening to the lid.

[0020] (4)(1) In the railway vehicles described above, The partition member includes a flat first plate wall portion welded to the floor plate along the side outer plate, a protruding wall portion with a predetermined cross-section that is welded to the front end portion and the rear end portion in the vehicle longitudinal direction of the first plate wall portion above the floor plate and protrudes toward the passenger compartment side, an opening portion that opens with a predetermined vertical width from the lower end portion of the protruding wall portion to the floor plate between the front end portion and the rear end portion of the first plate wall portion, and a lid portion that is welded from the passenger compartment side to the opening portion and has the same cross-section as the protruding wall portion.

[0021] In the present invention, the partition member includes a flat first plate wall portion welded to the floor plate along the side outer plate, a protruding wall portion with a predetermined cross-section that is welded to the front end portion and the rear end portion in the vehicle longitudinal direction of the first plate wall portion above the floor plate and protrudes toward the passenger compartment side, an opening portion that opens with a predetermined vertical width from the lower end portion of the protruding wall portion to the floor plate between the front end portion and the rear end portion of the first plate wall portion, and a lid portion that is welded from the passenger compartment side to the opening portion and has the same cross-section as the protruding wall portion. Therefore, the partition member can be composed of a first plate wall portion that can be formed from a flat plate material, a protruding wall portion that can be formed by bending the flat plate material into a predetermined cross-section, and a lid portion that can be formed by bending in the same manner as the protruding wall portion. Therefore, the partition member can be manufactured at a low cost using a plate material with a simple shape. In addition, since the partition member can be formed into a cross-section with a simple shape, the partition member can be welded to the floor plate more easily.

[0022] (5) In the railway vehicle described in (1), The partition member includes a flat first plate wall portion welded to the floor plate along the side outer plate, a pair of flat second plate wall portions that are welded to the front end portion and the rear end portion in the vehicle longitudinal direction of the first plate wall portion, and whose lower end portions are welded to the floor plate and protrude toward the passenger compartment side respectively, a flat third plate wall portion that is welded to both passenger compartment side end portions of the second plate wall portion above the floor plate, an opening portion that opens with a predetermined vertical width from the lower end portion of the third plate wall portion to the floor plate between both passenger compartment side end portions of the second plate wall portion, and a flat lid portion that is welded from the passenger compartment side to the opening portion.

[0023] In the present invention, the partition member includes a flat first plate wall portion welded to the floor plate along the side outer plate, a pair of flat second plate wall portions welded to the front end portion and the rear end portion in the vehicle longitudinal direction of the first plate wall portion, and having their lower end portions welded to the floor plate and projecting toward the passenger compartment side, a flat third plate wall portion welded to both passenger compartment side end portions of the second plate wall portions above the floor plate, an opening opening with a predetermined vertical width from the lower end portion of the third plate wall portion to the floor plate between both passenger compartment side end portions of the second plate wall portions, and a flat lid portion welded to the opening from the passenger compartment side. Therefore, the partition member can be composed of the first plate wall portion, the second plate wall portion, the third plate wall portion, and the lid portion, which can each be formed from a flat plate material. Therefore, the partition member can be manufactured at a low cost with a simpler shaped member. Further, since the partition member can be formed into a square tube cross-section with a simple linear shaped plate material, the partition member can be welded linearly to the floor plate and can be welded more easily.

[0024] (6) In the railway vehicle according to (1), The partition member is characterized in that it includes a pair of wall plate portions welded to the side outer plate along the vehicle vertical direction at both the front end portion and the rear end portion in the vehicle longitudinal direction of the through hole and projecting toward the passenger compartment side, an opening opening toward the passenger compartment side along the vehicle vertical direction between the passenger compartment side end portions of the wall plate portions, and the lid portion welded to the opening from the passenger compartment side.

[0025] In the present invention, the partition member is welded to the side outer plate along the vehicle vertical direction at both the front end portion and the rear end portion in the vehicle longitudinal direction of the through hole, and includes a pair of wall plate portions projecting toward the passenger compartment side, an opening opening toward the passenger compartment side along the vehicle vertical direction between the passenger compartment side end portions of the wall plate portions, and the lid portion welded to the opening from the passenger compartment side. Therefore, from the front end portion to the rear end portion of the through hole, the side outer plate also serves as a part of the partition member, and the configuration of the partition member can be simplified. Therefore, the partition member can be manufactured at a low cost while being lightweight.

[0026] Furthermore, within the welding area for welding the floor plate and the bulkhead member, in the welding area on the inner circumference side of the bulkhead member that is close to the side outer plate, with the opening as the boundary, the floor portion near the side outer plate and the inner circumference portion of the wall plate near the side outer plate can be easily welded from the inside of the wall plate by inserting a welding torch between the wall plate portions from the opening that opens towards the passenger compartment. Also, within the welding area for welding the floor plate and the bulkhead member, in the welding area on the outer circumference side of the bulkhead member that is spaced away from the side outer plate and close to the passenger compartment, with the opening as the boundary, the floor portion near the passenger compartment and the lid portion of the floor plate with a through hole formed therein can be easily welded from the outside of the lid portion, and the opening and the lid portion can be easily welded from the outside of the lid portion.

[0027] (7) In a method of manufacturing a railway vehicle described in any one of (1) to (6), The invention is characterized by comprising: a first welding step of welding the welding area on the inner circumference side of the bulkhead member that is close to the side outer plate, with the opening as the boundary, within the welding area for welding the floor plate and the bulkhead member; and a second welding step of welding the welding area on the outer circumference side of the bulkhead member that is spaced away from the side outer plate and close to the passenger compartment.

[0028] In this invention, the welding area for welding the floor plate and the partition wall member comprises a first welding step of welding the inner circumference side of the partition wall member that is close to the side outer plate, with the opening as the boundary, and a second welding step of welding the outer circumference side of the partition wall member that is spaced away from the side outer plate and close to the passenger compartment. As a result, the floor plate, through which a gas conduit passes through near the side outer plate, and the hollow partition wall member, welded to the floor plate around the through hole and enclosing the gas conduit and airtightly separating it from the passenger compartment, can be divided with the opening as the boundary into a welding area on the inner circumference side of the partition wall member that is close to the side outer plate and a welding area on the outer circumference side of the partition wall member that is spaced away from the side outer plate and close to the passenger compartment, and the entire welding area can be easily welded in a continuous state.

[0029] Therefore, it is possible to provide a method for manufacturing a railway vehicle that includes a bulkhead member that surrounds the gas conduit and airtightly separates it from the passenger compartment, and which can be easily welded to a floor plate that has a gas conduit penetration hole formed near the side outer plate.

[0030] (8) A railway vehicle equipped with a gas conduit arranged between a high-pressure gas container mounted on a roof panel constituting the roof structure and a gas usage device installed below a floor panel constituting the underframe, The floor plate has a second through-hole formed near the side outer plate that constitutes the side structure, through which the gas conduit passes. The vehicle body is provided with a hollow bulkhead member that is welded to the floor plate and the second cover around the second through-hole, surrounding the gas conduit and airtightly separating it from the passenger compartment. The partition member is characterized by having the second cover portion welded around its lower end.

[0031] In this invention, the floor plate has a second through-hole formed near the side outer panel that constitutes the side structure, through which a gas conduit passes. Inside the vehicle body, a hollow bulkhead member is provided, welded to the floor plate via a second cover around the second through-hole, enclosing the gas conduit and airtightly separating it from the passenger compartment. The bulkhead member has a second cover welded around its lower end. Therefore, in accordance with the interpretation standards of the ministerial ordinance under the High-Pressure Gas Safety Act, the gas conduit can be airtightly separated from the passenger compartment by the bulkhead member. Furthermore, the hollow portion of the bulkhead member welded to the floor plate via the second cover around the second through-hole can be ventilated with the outside of the vehicle body, preventing gas from accumulating in the hollow portion of the bulkhead member. In addition, since the second through-hole formed near the side outer panel through which the gas conduit passes, the bulkhead member enclosing the gas conduit is less likely to protrude into the passenger compartment, improving the space efficiency of the passenger compartment.

[0032] Furthermore, the vehicle body is equipped with a hollow bulkhead member that is welded to the floor plate and a second cover portion around the second through-hole, enclosing the gas conduit and airtightly separating it from the passenger compartment. The bulkhead member is equipped with a second cover portion welded around its lower end. By dividing the welding area for welding the lower end of the bulkhead member, the second cover portion, and the floor plate into a welding area on the bulkhead member side where the lower end of the bulkhead member and the second cover portion are welded, and a welding area on the floor plate side where the second cover portion and the floor plate are welded, the entire assembly can be easily welded.

[0033] In other words, within the welding area for welding the lower end of the bulkhead member to the second lid and the floor plate, the welding area on the bulkhead member side for welding the lower end of the bulkhead member to the second lid can be pre-welded in a location other than where the side structure and the underframe are assembled. In this case, it is not obstructed by the side outer plate. Also, within the welding area for welding the lower end of the bulkhead member to the second lid and the floor plate, the welding area on the floor plate side for welding the second lid to the floor plate can be welded at an intermediate position between the side outer plate and the vertical wall portion of the bulkhead member, for example, the inner circumference of the second through-hole and the second lid. In this case, welding can be easily performed at a position spaced apart from the side outer plate.

[0034] Therefore, the floor plate, which has a second through-hole formed near the side outer plate through which the gas conduit passes, and the hollow bulkhead member that surrounds the gas conduit and airtightly separates it from the passenger compartment, can be divided into a welding area on the bulkhead member side, which can be welded without being obstructed by the side outer plate, and a welding area on the floor plate side, which can be welded at a position separated from the side outer plate, allowing the entire welding area of ​​each to be easily welded.

[0035] Therefore, it is possible to provide a railway vehicle equipped with a bulkhead member that surrounds the gas conduit and airtightly separates it from the passenger compartment, and which can be easily welded to a floor plate having a gas conduit penetration hole formed near the side outer plate.

[0036] In the method of manufacturing railway vehicles described in (9)(8), The present invention is characterized by comprising: a first welding step on the partition wall member side, in which the lower end of the partition wall member is welded to the second lid; and a second welding step on the floor plate side, in which the second lid, welded to the lower end of the partition wall member, is welded to the floor plate.

[0037] In this invention, a first welding step is provided on the partition wall member side for welding the lower end of the partition wall member to the second lid. Therefore, the welding area on the partition wall member side for welding the lower end of the partition wall member to the second lid can be pre-welded in a location other than where the side structure and the underframe are assembled. In this case, it is not obstructed by the side outer plate. Furthermore, a second welding step is provided on the floor plate side for welding the second lid, which is welded to the lower end of the partition wall member, to the floor plate. Therefore, the welding area on the floor plate side for welding the second lid to the floor plate can be located at an intermediate position between the side outer plate and the vertical wall portion of the partition wall member. For example, the inner circumference of the second through-hole can be welded to the second lid. In this case, welding can be easily performed at a position spaced apart from the side outer plate.

[0038] Therefore, the floor plate, which has a second through-hole formed near the side outer plate through which the gas conduit passes, and the hollow bulkhead member that surrounds the gas conduit and airtightly separates it from the passenger compartment, can be divided into a welding area on the bulkhead member side, which can be welded without being obstructed by the side outer plate, and a welding area on the floor plate side, which can be welded at a position separated from the side outer plate, allowing the entire welding area of ​​each to be easily welded.

[0039] Therefore, it is possible to provide a method for manufacturing a railway vehicle that includes a bulkhead member that surrounds the gas conduit and airtightly separates it from the passenger compartment, and which can be easily welded to a floor plate that has a gas conduit penetration hole formed near the side outer plate. [Effects of the Invention]

[0040] According to the present invention, it is possible to provide a railway vehicle equipped with a bulkhead member that surrounds a gas conduit and airtightly separates it from the passenger compartment, and which can be easily welded to a floor plate having a gas conduit penetration hole formed near the side outer plate, and a method for manufacturing the railway vehicle. [Brief explanation of the drawing]

[0041] [Figure 1] This is a schematic side view of a railway vehicle according to one embodiment of the present invention. [Figure 2] Figure 1 shows a cross-sectional view of AA, which is a partial cross-sectional view near the side outer plate. [Figure 3]Figure 2 shows a cross-sectional view of the BB, specifically a partial cross-section near the floorboard. [Figure 4] Figure 1 is a schematic perspective view showing the welding area and welding process between the floor plate and the bulkhead member in the railway vehicle shown. (A) shows a schematic perspective view of the side structure and underframe assembled, (B) shows a schematic perspective view showing the welding area on the inner circumference side of the bulkhead member adjacent to the side outer plate and the first welding process for welding that area, and (C) shows a schematic perspective view showing the welding area on the outer circumference side of the bulkhead member spaced away from the side outer plate and adjacent to the passenger compartment, and the second welding process for welding that area. [Figure 5] This is a cross-sectional view of CC shown in Figure 4(B). [Figure 6] Figure 4(C) shows a cross-sectional view of the DD. [Figure 7] Figure 1 shows a schematic perspective view of the welding area and welding process between the floor plate and the bulkhead member in the first modified example of the railway vehicle shown in Figure 1. (A) shows a schematic perspective view of the side structure and the underframe assembled, (B) shows a schematic perspective view of the welding area on the inner circumference side of the bulkhead member adjacent to the side outer plate and the first welding process for welding the said area, and (C) shows a schematic perspective view of the welding area on the outer circumference side of the bulkhead member spaced away from the side outer plate and adjacent to the passenger compartment and the second welding process for welding the said area. [Figure 8] Figure 1 shows a schematic perspective view of the welding area and welding process between the floor plate and the bulkhead member in a second modified example of the railway vehicle shown in Figure 1. (A) shows a schematic perspective view of the side structure and underframe assembled, (B) shows a schematic perspective view of the welding area on the inner circumference side (inside the vehicle) of the bulkhead member adjacent to the side outer plate and the first welding process for welding this area, and (C) shows a schematic perspective view of the welding area on the outer circumference side of the bulkhead member spaced away from the side outer plate and close to the passenger compartment and the second welding process for welding this area. [Figure 9]Figure 1 shows a schematic perspective view of the third modified example of the railway vehicle, illustrating the welding area and welding process between the floor plate and the bulkhead member. (A) shows a schematic perspective view of the side structure and underframe assembled; (B) shows a schematic perspective view of the welding area on the inner circumference side of the bulkhead member adjacent to the side outer plate and the first welding process for welding this area; and (C) shows a schematic perspective view of the welding area on the outer circumference side of the bulkhead member spaced away from the side outer plate and adjacent to the passenger compartment, and the second welding process for welding this area. [Figure 10] Figure 1 shows a schematic perspective view of the fourth modified example of the railway vehicle, illustrating the welding area and welding process between the floor plate and the bulkhead member. (A) shows a schematic perspective view of the bulkhead member with the wall plate portion welded to the side outer plate; (B) shows a schematic perspective view of the welding area on the inner circumference side of the bulkhead member adjacent to the side outer plate and the first welding process for welding this area; and (C) shows a schematic perspective view of the welding area on the outer circumference side of the bulkhead member, spaced apart from the side outer plate and close to the passenger compartment, and the second welding process for welding this area. [Figure 11] Figure 1 shows a schematic perspective view of the fifth modified example of the railway vehicle, illustrating the welding area and welding process between the floor plate and the bulkhead member. (A) shows a schematic perspective view of the side structure and the underframe assembled; (B) shows a schematic perspective view of the welding area on the bulkhead member side, where the lower end of the bulkhead member and the second cover are welded at another location, and the first welding process for welding this area; and (C) shows a schematic perspective view of the welding area on the floor plate side, where the second cover of the bulkhead member and the floor plate are welded, and the second welding process for welding this area. [Figure 12] This is a schematic side view of the railway vehicle described in Patent Document 1. [Modes for carrying out the invention]

[0042] <Composition of this railway vehicle> Next, a railway vehicle according to one embodiment of the present invention will be described in detail with reference to the drawings.

[0043] Figure 1 shows a schematic side view of a railway vehicle according to one embodiment of the present invention. Figure 2 shows a partial cross-sectional view of section AA shown in Figure 1, closer to the side outer plate. Figure 3 shows a partial cross-sectional view of section BB shown in Figure 2, closer to the floor plate. Figure 4 shows schematic perspective views of the railway vehicle shown in Figure 1, representing the welding area between the floor plate and the bulkhead member and the welding process therefor. Figure 4(A) shows a schematic perspective view of the side structure and the underframe assembled. Figure 4(B) shows a schematic perspective view of the welding area on the inner circumference side of the bulkhead member adjacent to the side outer plate and the first welding process for welding this area. Figure 4(C) shows a schematic perspective view of the welding area on the outer circumference side of the bulkhead member spaced away from the side outer plate and close to the passenger compartment, and the second welding process for welding this area. Figure 5 shows a cross-sectional view CC shown in Figure 4(B). Figure 6 shows a cross-sectional view DD shown in Figure 4(C).

[0044] As shown in Figure 1, the railway vehicle 10 is equipped with a gas conduit 4 arranged between a high-pressure gas container 1 mounted on a roof plate YK1 that constitutes the roof structure YK, and a gas usage device 3 installed below the floor plate 2 that constitutes the underframe DW. The railway vehicle 10 includes a bogie DS that runs on rails RL, an underframe DW supported by the bogie DS, side structures GK that stand upright at both ends of the underframe DW in the vehicle width direction, end structures TK that stand upright at both ends of the underframe DW in the vehicle longitudinal direction, and a roof structure YK connected to the upper ends of the side structures GK and end structures TK. The side structures GK are equipped with side windows GM, passenger side doors GT1, and crew side doors GT2. Various equipment KZ is suspended from the underframe DW.

[0045] The high-pressure gas container 1 is a gas container that stores, for example, a high-pressure gas 1G at approximately 30 MPa to 70 MPa. The high-pressure gas container 1 can store hydrogen gas, methane, or other natural gases. Here, the high-pressure gas 1G stored in the high-pressure gas container 1 is hydrogen gas, but it is not necessarily limited to this. The gas-using device 3 is a fuel cell 3 that generates electricity using hydrogen gas supplied from the high-pressure gas container 1, but it is not necessarily limited to this.

[0046] As shown in Figures 1 to 3, the gas conduit 4 comprises a supply gas conduit 4a for supplying gas 1G from the high-pressure gas container 1 to the gas usage device 3, and a filling gas conduit 4b for filling the high-pressure gas container 1 with gas 1G. The connection between the high-pressure gas container 1 and the gas conduit 4 is equipped with a pressure reducing valve, flow control valve, etc. (not shown). The high-pressure gas 1G stored in the high-pressure gas container 1 is reduced to a predetermined pressure (for example, about 1 MPa) via the pressure reducing valve, etc., and flows through the gas conduit 4.

[0047] The gas conduit 4 is inserted into the vehicle body ST through an upper through-hole JK formed in the upper end (eaves beam) of the roof panel YK1 or side structure GK, and is routed along the side outer panel GK1 that constitutes the side structure GK, passing through the winding section HY of the side window GM, and down to below the floor panel 2 of the underframe DW. A horizontal frame GK2 extending in the longitudinal direction of the vehicle is joined to the side outer panel GK1, and the horizontal frame GK2 is connected to a vertical frame GK3 extending in the vertical direction of the vehicle. Here, the gas conduit 4 is located on the passenger compartment side of the horizontal frame GK2, and is positioned between adjacent vertical frame GK3s.

[0048] The horizontal frame GK2 comprises a pair of flange portions GK21 joined to the inner surface of the side outer panel GK1, a pair of vertical wall portions GK22 rising from the flange portions GK21 toward the passenger compartment, and a top portion GK23 connecting the vertical wall portions GK22, and is formed in a hat cross-section. The vertical frame GK3 comprises a pair of flange portions GK31 joined to the top portion GK23 of the horizontal frame GK2, a pair of vertical wall portions GK32 rising from the flange portions GK31 toward the passenger compartment, and a top portion GK33 connecting the vertical wall portions GK32, and is formed in a hat cross-section.

[0049] The floor plate 2 has a through-hole 21 formed near the side outer plate GK1 through which the gas conduit 4 passes. The vehicle body ST also includes a hollow bulkhead member 6, welded to the floor plate 2 around the through-hole 21, which surrounds the gas conduit 4 and airtightly separates it from the passenger compartment 5. The bulkhead member 6 has a vertical wall portion 61 that surrounds the gas conduit 4. Therefore, in accordance with the interpretation standards of the ministerial ordinance under the High-Pressure Gas Safety Act, the gas conduit 4 can be airtightly separated from the passenger compartment 5 by the bulkhead member 6. Through the through-hole 21 in the floor plate 2, the hollow portion 6T of the bulkhead member 6 and the outside of the vehicle body ST can ventilate, preventing gas 1G from accumulating in the hollow portion 6T of the bulkhead member 6 even if gas 1G leaks from the gas conduit 4. The hollow portion 6T of the bulkhead member 6 is in communication with an upper through-hole JK formed in the upper end (eave girder) of the roof plate YK1 or the side structure GK. Therefore, the accumulation of gas 1G within the hollow portion 6T of the partition member 6 can be further avoided through the upper through-hole JK.

[0050] Furthermore, since the floor plate 2 has a through-hole 21 formed near the side outer panel GK1 through which the gas conduit 4 passes, the bulkhead member 6 surrounding the gas conduit 4 is less likely to protrude toward the passenger compartment 5, thereby improving the space efficiency of the passenger compartment 5. Here, the gas conduit 4 is located on the passenger compartment side of the horizontal frame GK2 and between adjacent vertical frame GK3s. However, for example, the horizontal frame GK2 may be cut or partially removed near the gas conduit 4 to bring the gas conduit 4 even closer to the side outer panel GK1, thereby further increasing the space of the passenger compartment 5. Alternatively, in the side window GM's junction HY, the vertical frame GK3 may be abolished or reduced, and the vertical wall portion 61 of the bulkhead member 6 may be connected to the horizontal frame GK2. In this case, the opening area of ​​the side window GM can be increased. The passenger compartment 5 includes an interior panel 51 installed at a predetermined distance from the side outer panel GK1, a passenger compartment floor 52 installed above the floor panel 2, and a ceiling panel and passenger seats (not shown).

[0051] The bulkhead member 6 is located near the through-hole 21 in the floor plate 2 and includes a welding opening 611 in the hollow portion 6T of the bulkhead member 6 that opens towards the passenger compartment 5, and a cover portion 62 welded to the opening 611 from the passenger compartment 5 side. Therefore, by dividing the welding area YR for welding the floor plate 2 and the bulkhead member 6 into a welding area YR1 on the inner circumference side of the bulkhead member that is close to the side outer plate GK1 and a welding area YR2 on the outer circumference side of the bulkhead member that is spaced away from the side outer plate GK1 and close to the passenger compartment 5, with the opening 611 (more specifically, a plane perpendicular to the floor plate 2 and connecting the front end 6A1 and the rear end 6A2 in the vehicle longitudinal direction) as the boundary, the floor plate 2 and the bulkhead member 6 can be easily welded together as a whole.

[0052] Specifically, as shown in Figures 2 to 6, within the welding area YR for welding the floor plate 2 and the bulkhead member 6, with the opening 611 as the boundary, in the welding area YR1 on the inner circumference side of the bulkhead member adjacent to the side outer plate GK1, the floor portion 22a of the floor plate 2, in which the through hole 21 is formed, and the inner circumference 61a of the bulkhead member 6, excluding the opening 611, can be welded (fillet welded) from the inside of the bulkhead member 6 by inserting a welding torch YT into the hollow portion 6T of the bulkhead member 6 through the welding work opening 611 that opens towards the passenger compartment 5.

[0053] Within the welding area YR for welding the floor plate 2 and the bulkhead member 6, in the welding area YR2 on the outer circumference side of the bulkhead member, which is separated from the side outer plate GK1 and close to the passenger compartment 5 with the opening 611 as the boundary, the floor portion 22b closer to the passenger compartment and the cover portion 62 of the floor plate 2 in which the through hole 21 is formed can be welded (fillet weld) from the outside of the cover portion 62, and the opening 611 and the cover portion 62 can be welded from the outside of the bulkhead member 6. Here, the end face of the cover portion 62 and the end face of the vertical wall portion 61 are each formed perpendicular to the outer surface, and the perpendicular surfaces are butted together so that the cover portion 62 is welded (butt weld) so that its outer surface is flush with the vertical wall portion 61. However, this is not the only option, and the cover portion 62 may also be connected to the vertical wall portion 61 in a stepped manner on the outside or inside of the plate and welded (fillet weld). Alternatively, the end faces of the lid portion 62 and the vertical wall portion 61 may be formed as inclined surfaces with respect to the outer surface, and the inclined surfaces may be butted together and welded (butt welded) so that the outer surfaces are flush.

[0054] Therefore, the floor plate 2, through which the gas conduit 4 passes, has a through hole 21 formed near the side outer plate GK1, and the hollow bulkhead member 6, which is welded to the floor plate 2 around the through hole 21 and surrounds the gas conduit 4, creating an airtight partition from the passenger compartment 5, can be divided into a welding area YR1 on the inner circumference of the bulkhead member, which is close to the side outer plate GK1, and a welding area YR2 on the outer circumference of the bulkhead member, which is spaced apart from the side outer plate GK1 and close to the passenger compartment 5, with the opening 611 as the boundary. This allows the entire welding area YR to be easily welded in a continuous state. The gas conduit 4 is inserted into the hollow portion 6T of the bulkhead member 6 after the floor plate 2 and the bulkhead member 6 have been welded together.

[0055] Therefore, it is possible to provide a railway vehicle 10 equipped with a bulkhead member 6 that surrounds the gas conduit 4 and airtightly separates it from the passenger compartment 5, and which can be easily welded to a floor plate 2 in which a through-hole 21 for the gas conduit 4 is formed near the side outer plate GK1.

[0056] In this railway vehicle 10, the bulkhead member 6 is formed as a flat cylindrical body 6A that is long in the longitudinal direction of the vehicle and short in the width direction of the vehicle. The opening 611A is formed from the front end 6A1 to the rear end 6A2 in the longitudinal direction of the vehicle, and from the lower end 6A3 with a predetermined vertical width W1. In this case, since the bulkhead member 6 is formed as a flat cylindrical body 6A that is long in the longitudinal direction of the vehicle and short in the width direction of the vehicle, it can accommodate multiple gas conduits 4 (for example, a supply gas conduit 4a and a filling gas conduit 4b). Therefore, the space efficiency of the passenger compartment 5 can be improved by increasing the accommodation space of the bulkhead member 6 for the gas conduits 4 while reducing the amount of protrusion of the bulkhead member 6 toward the passenger compartment 5. Note that the cylindrical body 6A is formed as an oval cylindrical body here, but it is not necessarily limited to this, and for example, it may be a rectangular cylindrical body or an elliptical cylindrical body.

[0057] Within the welding area YR for welding the floor plate 2 and the bulkhead member 6, the welding area YR1 on the inner circumference side of the bulkhead member adjacent to the side outer plate GK1, with the opening 611 as the boundary, is a welding area for welding the floor portion 22a near the side outer plate and the inner circumference portion 61a near the side outer plate from the front end 6A1 to the rear end 6A2 of the cylindrical body 6A in the vehicle longitudinal direction. The opening 611A is open from the lower end 6A3 with a predetermined vertical width W1 from the front end 6A1 to the rear end 6A2 of the cylindrical body 6A in the vehicle longitudinal direction. Therefore, by inserting the welding torch YT into the hollow portion 6T of the cylindrical body 6A through the opening 611A, the floor portion 22a near the side outer plate and the inner circumference portion 61a of the cylindrical body 6A near the side outer plate, excluding the opening 611A, can be easily welded from the inside of the cylindrical body 6A.

[0058] Furthermore, within the welding area YR for welding the floor plate 2 and the cylindrical body 6A of the bulkhead member 6, in the welding area YR2 on the outer circumference side of the bulkhead member that is spaced away from the side outer plate GK1 and close to the passenger compartment 5, with the opening 611 as the boundary, the floor portion 22b closer to the passenger compartment and the cover portion 62A of the floor plate 2 in which the through hole 21 is formed can be welded from the outside of the cylindrical body 6A, and the opening 611A and the cover portion 62A can be easily welded from the outside of the cylindrical body 6A.

[0059] <Variation> (First variation) It goes without saying that the railway vehicle 10 can be modified into various forms without changing the gist of the present invention. For example, Figure 7 shows a schematic perspective view of the welding area between the floor plate and the bulkhead member and the welding process in a first modified example of the railway vehicle shown in Figure 1. Figure 7(A) shows a schematic perspective view of the side structure and the underframe assembled, Figure 7(B) shows a schematic perspective view of the welding area on the inner circumference side of the bulkhead member adjacent to the side outer plate and the first welding process for welding the said area, and Figure 7(C) shows a schematic perspective view of the welding area on the outer circumference side of the bulkhead member spaced away from the side outer plate and adjacent to the passenger compartment and the second welding process for welding the said area.

[0060] As shown in Figures 1 and 7, in the first modified example of the railway vehicle 10B, the bulkhead member 6 is formed as a flat cylindrical body 6B that is long in the longitudinal direction of the vehicle and short in the width direction of the vehicle. The opening 611B is located near the upper part of the lower end 6B3 of the cylindrical body 6B, and is open with a predetermined vertical width W1 from the front end 6B1 to the rear end 6B2 of the cylindrical body 6B in the longitudinal direction of the vehicle. In this case, the entire lower end 6B3 of the cylindrical body 6B is in contact with the floor plate 2, and the floor plate 2 and the cylindrical body 6B are welded together, so welding can be performed easily and stably. In addition, since the entire circumference of the lower end 6B3 of the cylindrical body 6B is connected, the rigidity around the opening 611B of the cylindrical body 6B is improved, and welding between the opening 611B and the lid 62B can be performed easily and accurately.

[0061] Within the welding area YR for welding the floor plate 2 and the cylindrical body 6B, in the welding area YR1 on the inner circumference side of the bulkhead member adjacent to the side outer plate GK1, the floor portion 22a near the side outer plate and the inner circumference portion 61a of the cylindrical body 6B near the side outer plate can be easily welded from the inside of the cylindrical body 6B by inserting a welding torch YT into the hollow portion 6T from the opening 611B that opens towards the passenger compartment 5. Furthermore, within the welding area YR where the floor plate 2 and the cylindrical body 6B are welded, in the welding area YR2 on the outer circumference side of the bulkhead member that is spaced away from the side outer plate GK1 and close to the passenger compartment 5, with the opening 611B as the boundary, the floor portion 22b closer to the passenger compartment within the floor plate 2 in which the through hole 21 is formed and the lower end portion 6B3 of the cylindrical body 6B can be easily welded from the outside of the cylindrical body 6B plate, and the opening 611B and the lid portion 62B can also be easily welded from the outside of the cylindrical body 6B plate.

[0062] (Second variation) Figure 8 shows a schematic perspective view illustrating the welding area and welding process between the floor plate and the bulkhead member in a second modified example of the railway vehicle shown in Figure 1. Figure 8(A) shows a schematic perspective view of the side structure and underframe assembled, Figure 8(B) shows a schematic perspective view illustrating the welding area on the inner circumference side (inside the vehicle) of the bulkhead member adjacent to the side outer plate and the first welding process for welding this area, and Figure 8(C) shows a schematic perspective view illustrating the welding area on the outer circumference side of the bulkhead member, spaced away from the side outer plate and close to the passenger compartment, and the second welding process for welding this area.

[0063] As shown in Figures 1 and 8, in the second modified railway vehicle 10C, the bulkhead member 6C comprises a flat first plate wall portion 6C1 welded to the floor plate 2 along the side outer plate GK1, a protruding wall portion 6C2 of a predetermined cross-section welded to the front end 6C11 and rear end 6C12 of the first plate wall portion 6C1 in the vehicle longitudinal direction above the floor plate 2 and projecting toward the passenger compartment 5, an opening 611C between the front end 6C11 and rear end 6C12 of the first plate wall portion 6C1, opening with a predetermined vertical width W1 from the lower end 6C21 of the protruding wall portion 6C2 down to the floor plate 2, and a cover portion 62C welded to the opening 611C from the passenger compartment 5 side and having the same cross-section as the protruding wall portion 6C2. The first plate wall portion 6C1 is arranged parallel to the side outer plate GK1. The bulkhead member 6C is formed as a flat cylindrical body that is long in the vehicle longitudinal direction and short in the vehicle width direction. The protruding wall portion 6C2 and the cover portion 62C are formed in a U-shaped cross-section here, but this is not necessarily the only option; for example, they could also have an arc-shaped or elliptical arc-shaped cross-section.

[0064] In this case, the partition wall member 6C can be composed of a first plate wall portion 6C1 which can be formed from a flat plate, a protruding wall portion 6C2 which can be formed by bending the flat plate into a certain cross-section, and a lid portion 62C which can be formed by bending in the same way as the protruding wall portion 6C2. Therefore, the partition wall member 6C can be manufactured inexpensively from a plate with a simple shape. In addition, since the partition wall member 6C can be formed into a simple cylindrical cross-section, the partition wall member 6C can be welded to the floor plate 2 more easily.

[0065] Within the welding area YR for welding the floor plate 2 and the bulkhead member 6C, in the welding area YR1 on the inner circumference side of the bulkhead member adjacent to the side outer plate GK1, with the opening 611C as the boundary, the floor portion 22a near the side outer plate and the inner circumference portion 61a of the first plate wall portion 6C1 near the side outer plate can be easily welded from the inside of the first plate wall portion 6C1 by inserting a welding torch YT into the hollow portion 6T from the opening 611C that opens towards the passenger compartment 5. Furthermore, within the welding area YR for welding the floor plate 2 and the bulkhead member 6C, in the welding area YR2 on the outer circumference side of the bulkhead member, which is spaced away from the side outer plate GK1 and close to the passenger compartment 5 with the opening 611C as the boundary, the floor portion 22b closer to the passenger compartment and the cover portion 62C of the floor plate 2 in which the through hole 21C is formed can be easily welded from the outside of the cover portion 62C, and the opening 611C and the cover portion 62C can be easily welded from the outside of the bulkhead member 6C. Note that welding of the welding area YR3 between the first plate wall portion 6C1 and the protruding wall portion 6C2 may be performed before or after welding of the welding area YR1 on the inner circumference side of the bulkhead member, as long as it is done before welding the welding area YR2 on the outer circumference side of the bulkhead member.

[0066] (Third variation) Figure 9 shows a schematic perspective view illustrating the welding area and welding process between the floor plate and the bulkhead member in a third modified example of the railway vehicle shown in Figure 1. Figure 9(A) shows a schematic perspective view of the side structure and underframe assembled, Figure 9(B) shows a schematic perspective view illustrating the welding area on the inner circumference side of the bulkhead member adjacent to the side outer plate and the first welding process for welding this area, and Figure 9(C) shows a schematic perspective view illustrating the welding area on the outer circumference side of the bulkhead member spaced away from the side outer plate and adjacent to the passenger compartment, and the second welding process for welding this area.

[0067] As shown in Figures 1 and 9, in the third modified example of the railway vehicle 10D, the bulkhead member 6D comprises a flat first plate wall portion 6D1 welded to the floor plate 2 along the side outer plate GK1, a pair of flat second plate wall portions 6D2 welded to the front end 6D11 and rear end 6D12 of the first plate wall portion 6D1 in the vehicle longitudinal direction, with their lower ends 6D21 welded to the floor plate 2 and each protruding toward the passenger compartment 5, a flat third plate wall portion 6D3 welded to both passenger compartment-side ends 6D22 of the second plate wall portion 6D2 above the floor plate 2, an opening 611D between the two passenger compartment-side ends 6D22 of the second plate wall portion 6D2, opening with a predetermined vertical width W1 from the lower end 6D31 of the third plate wall portion 6D3 down to the floor plate 2, and a flat cover portion 62D welded to the opening 611D from the passenger compartment 5 side. The first plate wall section 6D1, the third plate wall section 6D3, and the lid section 62D are arranged parallel to the side outer plate GK1. The partition wall member 6D is formed as a flat, cylindrical body that is long in the vehicle's longitudinal direction and short in the vehicle's width direction.

[0068] In this case, the partition wall member 6D can be composed of a first plate wall section 6D1, a second plate wall section 6D2, a third plate wall section 6D3, and a lid section 62D, each of which can be formed from a flat plate. Therefore, the partition wall member 6D can be manufactured inexpensively using a simpler shaped component. Furthermore, since the partition wall member 6D can be formed into a rectangular tubular cross-section using a simple straight plate, the partition wall member 6D can be welded linearly to the floor plate 2, making welding easier.

[0069] Within the welding area YR for welding the floor plate 2 and the bulkhead member 6D, in the welding area YR1 on the inner circumference side of the bulkhead member adjacent to the side outer plate GK1, with the opening 611D as the boundary, the floor portion 22a near the side outer plate and the inner circumference portions 61a of the first plate wall portion 6D1 and the second plate wall portion 6D2 near the side outer plate can be easily welded from the inside of the first plate wall portion 6D1 and the second plate wall portion 6D2 by inserting a welding torch YT into the hollow portion 6T from the opening 611D that opens towards the passenger compartment 5. Furthermore, within the welding area YR for welding the floor plate 2 and the bulkhead member 6D, in the welding area YR2 on the outer circumference side of the bulkhead member that is spaced away from the side outer plate GK1 and close to the passenger compartment 5, with the opening 611D as the boundary, the floor portion 22b closer to the passenger compartment and the cover portion 62D of the floor plate 2 in which the through hole 21D is formed can be easily welded from the outside of the cover portion 62D, and the opening 611D and the cover portion 62D can also be easily welded from the outside of the cover portion 62D.

[0070] Furthermore, welding between the side outer plate floor portion 22a and the second plate wall portion 6D2 may be performed from the outside of the second plate wall portion 6D2. Also, it is preferable to perform the welding of the welding area YR3 between the first plate wall portion 6D1 and the second plate wall portion 6D2, and the welding of the welding area YR4 between the second plate wall portion 6D2 and the third plate wall portion 6D3, before welding the welding area YR1 on the inner circumference side of the partition wall member.

[0071] (Fourth variation) Figure 10 shows a schematic perspective view illustrating the welding area and welding process between the floor plate and the bulkhead member in a fourth modified example of the railway vehicle shown in Figure 1. Figure 10(A) shows a schematic perspective view of the bulkhead member with the wall plate portion welded to the side outer plate, Figure 10(B) shows a schematic perspective view illustrating the welding area on the inner circumference side of the bulkhead member adjacent to the side outer plate and the first welding process for welding this area, and Figure 10(C) shows a schematic perspective view illustrating the welding area on the outer circumference side of the bulkhead member, spaced away from the side outer plate and close to the passenger compartment, and the second welding process for welding this area.

[0072] As shown in Figures 1 and 10, in the fourth modified example of the railway vehicle 10E, the bulkhead member 6E comprises a pair of flat wall plate portions 6E2 that are welded to the side outer plate GK1 along the vertical direction of the vehicle at both the front end 211E and the rear end 212E in the longitudinal direction of the vehicle at the through hole 21E, and projecting toward the passenger compartment 5 side; an opening 611E that opens toward the passenger compartment 5 side along the vertical direction of the vehicle between the passenger compartment side ends 6E21 of the wall plate portions 6E2; and a cover portion 62E welded to the opening 611E from the passenger compartment 5 side. In this case, the side outer plate GK1 also serves as part of the bulkhead member 6E from the front end 211E to the rear end 212E of the through hole 21E, thereby simplifying the structure of the bulkhead member 6E. Therefore, the bulkhead member 6E can be made lighter and manufactured at low cost. Here, the cover portion 62E is formed in a U-shaped cross section along the perimeter of the passenger compartment 5 side of the through hole 21E, but it is not necessarily limited to this. For example, the passenger compartment-side end 6E21 of the wall plate portion 6E2 may be extended to the passenger compartment-side end of the through hole 21E, and the lid portion 62E may be formed in a flat plate shape. The bulkhead member 6E is formed as a flat cylindrical body that is long in the vehicle's longitudinal direction and short in the vehicle's width direction.

[0073] Within the welding area YR for welding the floor plate 2 and the bulkhead member 6E, in the welding area YR1 on the inner circumference side of the bulkhead member adjacent to the side outer plate GK1, with the opening 611E as the boundary, the floor portion 22a near the side outer plate and the inner circumference portion 61a of the wall plate portion 6E2 near the side outer plate can be easily welded from the inside of the wall plate portion 6E2 by inserting a welding torch YT between the wall plate portions 6E2 from the opening 611E that opens towards the passenger compartment 5. Furthermore, within the welding area YR where the floor plate 2 and the bulkhead member 6E are welded, in the welding area YR2 on the outer circumference side of the bulkhead member that is spaced away from the side outer plate GK1 and close to the passenger compartment 5, with the opening 611E as the boundary, the floor portion 22b closer to the passenger compartment and the cover portion 62E of the floor plate 2 in which the through hole 21E is formed can be easily welded from the outside of the cover portion 62E, and the opening 611E (more specifically, the passenger compartment side end portion 6E21 of the wall plate portion 6E2) and the cover portion 62E can be easily welded from the outside of the cover portion 62E.

[0074] Furthermore, the welding area YR3 between the side outer plate GK1 and the wall plate portion 6E2 may be welded (fillet welded) from the outside of the wall plate portion 6E2 during the fabrication of the side structure GK. Alternatively, a flange portion 6E22 that abuts against the inner surface of the side outer plate GK1 may be provided on the wall plate portion 6E2, and the welding area YR4 between the side outer plate GK1 and the flange portion 6E22 may be laser welded from either the inside or outside of the side outer plate GK1.

[0075] (Fifth variation) Figure 11 shows a schematic perspective view illustrating the welding area and welding process between the floor plate and the bulkhead member in a fifth modified example of the railway vehicle shown in Figure 1. Figure 11(A) shows a schematic perspective view of the side structure and the underframe assembled, Figure 11(B) shows a schematic perspective view illustrating the welding area on the bulkhead member side where the lower end of the bulkhead member and the second lid were welded at another location, and the first welding process for welding that area, and Figure 11(C) shows a schematic perspective view illustrating the welding area on the floor plate side where the second lid of the bulkhead member and the floor plate were welded, and the second welding process for welding that area.

[0076] As shown in Figures 1 and 11, the fifth modified railway vehicle 10F is a railway vehicle 10F equipped with a gas conduit 4 disposed between a high-pressure gas container 1 mounted on a roof plate YK1 constituting a roof structure YK and a gas usage device 3 installed below a floor plate 2 constituting a frame DW. The floor plate 2 has a second through-hole 21F formed near the side outer plate GK1 constituting a side structure GK through which the gas conduit 4 passes. Inside the vehicle body ST, there is a hollow bulkhead member 6F welded to the floor plate 2 via a second cover portion 62F around the second through-hole 21F, surrounding the gas conduit 4 and airtightly separating it from the passenger compartment 5. The bulkhead member 6F has a second cover portion 62F welded around its lower end portion 6F3. The bulkhead member 6F is formed as a flat cylindrical body that is long in the longitudinal direction of the vehicle and short in the width direction of the vehicle.

[0077] Here, the second through-hole 21F is formed along the side outer plate GK1 and is formed in a rectangular shape that is long in the vehicle longitudinal direction and short in the vehicle width direction. The vertical wall portion 61F of the bulkhead member 6F is formed as a cylindrical body with an oval cross-section, spaced a predetermined distance from the second through-hole 21F in the vehicle longitudinal direction and the vehicle width direction. The second lid portion 62F is formed with its outer edge being larger by a predetermined distance from the second through-hole 21F in the vehicle longitudinal direction and the vehicle width direction, and a fitting hole is formed in the center that fits with the lower end portion 6F3 of the bulkhead member 6F. However, it is not necessarily limited to this.

[0078] In this railway vehicle 10F, a second through-hole 21F is formed in the floor plate 2 near the side outer plate GK1 that constitutes the side structure GK, through which the gas conduit 4 passes. Inside the car body ST, a hollow bulkhead member 6F is provided, welded to the floor plate 2 via a second cover portion 62F around the second through-hole 21F, enclosing the gas conduit 4 and airtightly separating it from the passenger compartment 5. The bulkhead member 6F is equipped with a second cover portion 62F welded around its lower end portion 6F3. Therefore, in accordance with the interpretation standards of the ministerial ordinance under the High Pressure Gas Safety Act, the gas conduit 4 can be airtightly separated from the passenger compartment 5 by the bulkhead member 6F. Furthermore, the hollow portion 6T of the bulkhead member 6F, welded to the floor plate 2 via the second cover portion 62F around the second through-hole 21F, can be ventilated with the outside of the car body ST, thus preventing the accumulation of gas 1G within the hollow portion 6T of the bulkhead member 6F. Furthermore, the bulkhead member 6F surrounding the gas conduit 4 is less likely to protrude toward the passenger compartment 5, thereby improving the space efficiency of the passenger compartment 5.

[0079] By dividing the welding area YRF, which welds the lower end portion 6F3 of the bulkhead member 6F, the second lid portion 62F, and the floor plate 2, into a welding area YR5 on the bulkhead member side where the lower end portion 6F3 of the bulkhead member 6F and the second lid portion 62F are welded, and a welding area YR6 on the floor plate side where the second lid portion 62F and the floor plate 2 are welded, the entire structure can be easily welded.

[0080] In other words, within the welding area YRF where the lower end portion 6F3 of the bulkhead member 6F, the second lid portion 62F, and the floor plate 2 are welded, the welding area YR5 on the bulkhead member side where the lower end portion 6F3 of the bulkhead member 6F and the second lid portion 62F are welded can be pre-welded at a location other than where the side structure GK and the underframe DW are assembled. In this case, the side outer plate GK1 does not get in the way. Also, within the welding area YRF where the lower end portion 6F3 of the bulkhead member 6F, the second lid portion 62F, and the floor plate 2 are welded, in the welding area YR6 on the floor plate side where the second lid portion 62F and the floor plate 2 are welded, for example, the lower surface of the floor plate 2 and the outer edge of the second lid portion 62F can be welded from below the floor plate 2 at an intermediate position between the side outer plate GK1 and the vertical wall portion 61F of the bulkhead member 6F. In this case, welding can be easily performed at a position spaced apart from the side outer plate GK1.

[0081] Therefore, the floor plate 2, through which the gas conduit 4 passes, has a second through-hole 21F formed near the side outer plate GK1, and the hollow bulkhead member 6F, which surrounds the gas conduit 4 and airtightly separates it from the passenger compartment 5, can be welded in two separate welding areas: a welding area YR5 on the bulkhead member side, which can be welded without being obstructed by the side outer plate GK1, and a welding area YR6 on the floor plate side, which can be welded at a position separated from the side outer plate GK1. This allows for easy welding of the entirety of each welding area YR6. Note that the welding area YR6 on the floor plate side may also be welded from above the floor plate 2 by inverting the vehicle body ST.

[0082] Therefore, it is possible to provide a railway vehicle 10F equipped with a bulkhead member 6F that surrounds the gas conduit 4 and airtightly separates it from the passenger compartment 5, and which can be easily welded to a floor plate 2 in which a through-hole 21F for the gas conduit 4 is formed near the side outer plate GK1.

[0083] Furthermore, the side outer panel GK1 is preferably equipped with an L-shaped bracket 63F that connects to the bulkhead member 6F. In this case, the bulkhead member 6F, which is welded to the second cover portion 62F, is inserted upward from the second through hole 21F of the floor plate 2 toward the vehicle, and with the second cover portion 62F in contact with the lower surface of the floor plate 2, the vertical wall portion 61F of the bulkhead member 6F and the tip of the bracket 63F are welded in the welding area YR7. This allows the welding area YR6 on the floor plate side to be easily welded (fillet welded) while the bulkhead member 6F is fixed to the floor plate 2. Here, the bracket 63F is formed as one piece, but it may also be divided into two parts: one part that is fixed to the side outer panel GK1 in advance and one part that is fixed to the bulkhead member 6F in advance.

[0084] <Manufacturing method for this railway vehicle> Next, the manufacturing methods for the railway vehicle 10 and its first to fourth modified examples will be described in detail with reference to Figures 1 to 10.

[0085] As shown in Figures 1 to 10, the manufacturing method for the railway vehicles 10, 10B, 10C, 10D, and 10E includes a first welding step S1 in which the welding area YR1 on the inner circumference side of the bulkhead member, which is close to the side outer plate GK1, is welded within the welding area YR for welding the floor plate 2 and the bulkhead members 6, 6C, 6D, and 6E, with the openings 611, 611B, 611C, 611D, and 611E as boundaries, and a second welding step S2 in which the welding area YR2 on the outer circumference side of the bulkhead member, which is spaced away from the side outer plate GK1 and close to the passenger compartment 5, is welded.

[0086] Here, a first welding step S1 is provided in which, within the welding area YR in which the floor plate 2 and the partition wall members 6, 6C, 6D, 6E are welded, the welding area YR1 on the inner circumference side of the partition wall member adjacent to the side outer plate GK1 is welded, with the openings 611, 611B, 611C, 611D, and 611E as boundaries. Therefore, within the floor plate 2 in which the through holes 21, 21C, 21D, and 21E are formed, the floor portion 22a closer to the side outer plate and the opening 611, The inner circumference 61a of the bulkhead members 6, 6C, 6D, and 6E near the side outer plate, excluding 611B, 611C, 611D, and 611E, and the welding openings 611, 611B, 611C, 611D, and 611E that open towards the passenger compartment 5, allow a welding torch YT to be inserted into the hollow portion 6T of the bulkhead members 6, 6C, 6D, and 6E, and welding (fillet welding) can be performed from the inside of the plates of the bulkhead members 6, 6C, 6D, and 6E.

[0087] Since the floor plate 2, in which through holes 21, 21C, 21D, 21E are formed, the floor portion 22b closer to the passenger compartment and the partition members 6, 6C, 6D, 6E or the cover portions 62, 62B, 62C, 62D, 62E, excluding the openings 611, 611B, 611C, 611D, 611E can be welded (fillet welded) from the outside of the partition members 6, 6C, 6D, 6E, and the openings 611, 611B, 611C, 611D, 611E and the cover portions 62, 62B, 62C, 62D, 62E can be welded from the outside of the partition members 6, 6C, 6D, 6E.

[0088] Therefore, the floor plate 2, through holes 21, 21C, 21D, and 21E formed near the side outer plate GK1 through which the gas conduit 4 passes, and the hollow bulkhead members 6, 6C, 6D, and 6E, which are welded to the floor plate 2 around the through holes 21, 21C, 21D, and 21E and surround the gas conduit 4, thereby airtightly separating them from the passenger compartment 5, can be divided into a welding area YR1 on the inner circumference of the bulkhead members close to the side outer plate GK1 and a welding area YR2 on the outer circumference of the bulkhead members spaced apart from the side outer plate GK1 and close to the passenger compartment 5, with the openings 611, 611B, 611C, 611D, and 611E as the boundary, allowing the entire welding area YR to be easily welded in a continuous state.

[0089] Therefore, it is possible to provide a method for manufacturing railway vehicles 10, 10B, 10C, 10D, and 10E equipped with bulkhead members 6, 6C, 6D, and 6E that surround the gas conduit 4 and airtightly separate it from the passenger compartment 5, and which can be easily welded to a floor plate 2 that has through-holes 21, 21C, 21D, and 21E for the gas conduit 4 formed near the side outer plate GK1.

[0090] Next, the manufacturing method of the fifth modified example, railway vehicle 10F, will be explained in detail with reference to Figures 1 and 11.

[0091] As shown in Figures 1 and 11, the manufacturing method for the fifth modified railway vehicle 10F includes a first welding step S1 on the bulkhead member side in which the lower end portion 6F3 of the bulkhead member 6F is welded to the second cover portion 62F, and a second welding step S2 on the floor plate side in which the second cover portion 62F welded to the lower end portion 6F3 of the bulkhead member 6F is welded to the floor plate 2.

[0092] Here, a first welding step S1 is provided on the bulkhead member side for welding the lower end portion 6F3 of the bulkhead member 6F to the second lid portion 62F. Therefore, the welding area YR5 on the bulkhead member side for welding the lower end portion 6F3 of the bulkhead member 6F to the second lid portion 62F can be pre-welded in a location other than where the side structure GK and the underframe DW are assembled. Thus, it is not obstructed by the side outer plate GK1. Furthermore, a second welding step S2 is provided on the floor plate side for welding the second lid portion 62F, which is welded to the lower end portion 6F3 of the bulkhead member 6F, to the floor plate 2. Therefore, the welding area YR6 on the floor plate side for welding the second lid portion 62F to the floor plate 2 is located at an intermediate position between the side outer plate GK1 and the vertical wall portion 61F of the bulkhead member 6F. For example, the lower surface of the floor plate 2 and the outer edge of the second lid portion 62F can be welded from below the floor plate 2. Therefore, welding can be easily performed at a position spaced apart from the side outer plate GK1.

[0093] Therefore, the floor plate 2, through which the gas conduit 4 passes, has a second through-hole 21F formed near the side outer plate GK1, and the hollow bulkhead member 6F, which surrounds the gas conduit 4 and airtightly separates it from the passenger compartment 5, can be welded in two separate welding areas: a welding area YR5 on the bulkhead member side, which can be welded without being obstructed by the side outer plate GK1, and a welding area YR6 on the floor plate side, which can be welded at a position spaced apart from the side outer plate GK1. This allows for easy welding of the entirety of each welding area YRF.

[0094] Therefore, it is possible to provide a method for manufacturing a railway vehicle 10F that includes a bulkhead member 6F that surrounds the gas conduit 4 and airtightly separates it from the passenger compartment 5, and which can be easily welded to a floor plate 2 in which a through-hole 21F for the gas conduit 4 is formed near the side outer plate GK1.

[0095] <Effects and Effects> As described in detail above, according to the railway vehicles 10, 10B, 10C, 10D, and 10E of this embodiment, through holes 21, 21C, 21D, and 21E are formed in the floor plate 2 near the side outer plate GK1 that constitutes the side structure GK, through which the gas conduit 4 passes. Hollow partition members 6, 6C, 6D, and 6E are provided inside the vehicle body ST, welded to the floor plate 2 around the through holes 21, 21C, 21D, and 21E, surrounding the gas conduit 4 and airtightly separating it from the passenger compartment 5. Therefore, in accordance with the interpretation standards of the ministerial ordinance under the High Pressure Gas Safety Act, the gas conduit 4 can be airtightly separated from the passenger compartment 5 by the partition members 6, 6C, 6D, and 6E. Furthermore, since the hollow sections 6T of the bulkhead members 6, 6C, 6D, and 6E can be ventilated between the bulkhead members 6, 6C, 6D, and 6E and the outside of the vehicle body ST through the through-holes 21, 21C, 21D, and 21E of the floor plate 2, even if gas 1G leaks from the gas conduit 4, the accumulation of gas 1G within the hollow sections 6T of the bulkhead members 6, 6C, 6D, and 6E can be avoided. In addition, the bulkhead members 6, 6C, 6D, and 6E surrounding the gas conduit 4 are less likely to protrude toward the passenger compartment 5, thereby improving the space efficiency of the passenger compartment 5.

[0096] The bulkhead members 6, 6C, 6D, and 6E are provided with welding openings 611, 611B, 611C, 611D, and 611E in a position close to the through holes 21, 21C, 21D, and 21E, where the hollow portion 6T of the bulkhead members 6, 6C, 6D, and 6E opens towards the passenger compartment 5, and lid portions 62, 62B, 62C, 62D, and 62E are welded to the openings 611, 611B, 611C, 611D, and 611E from the passenger compartment 5 side, so the floor plate By dividing the welding area YR for welding 2 to the bulkhead members 6, 6C, 6D, and 6E into a welding area YR1 on the inner circumference side of the bulkhead members that is close to the side outer plate GK1, and a welding area YR2 on the outer circumference side of the bulkhead members that is spaced away from the side outer plate GK1 and close to the passenger compartment 5, with the openings 611, 611B, 611C, 611D, and 611E as the boundary, the floor plate 2 and the bulkhead members 6, 6C, 6D, and 6E can be easily welded together as a whole.

[0097] In other words, within the welding area YR in which the floor plate 2 and the partition wall members 6, 6C, 6D, 6E are welded, with the openings 611, 611B, 611C, 611D, 611E as the boundary, in the welding area YR1 on the inner circumference side of the partition wall member that is close to the side outer plate GK1, through holes 21, 21C, 21D, 21E are formed in the floor portion 22a closer to the side outer plate and the openings 611, 611B, 61 The inner circumference 61a of the bulkhead members 6, 6C, 6D, and 6E near the side outer plate, excluding 1C, 611D, and 611E, and the welding openings 611, 611B, 611C, 611D, and 611E that open towards the passenger compartment 5, allow welding to be easily performed from the inside of the bulkhead members 6, 6C, 6D, and 6E by inserting a welding torch YT into the hollow portion 6T of the bulkhead members 6, 6C, 6D, and 6E.

[0098] Within the welding area YR where the floor plate 2 and the bulkhead members 6, 6C, 6D, 6E are welded, in the welding area YR2 on the outer circumference side of the bulkhead members that is separated from the side outer plate GK1 and close to the passenger compartment 5, with the openings 611, 611B, 611C, 611D, 611E as the boundary, through holes 21, 21C, 21D, 21E are formed in the floor portion 22b closer to the passenger compartment and the openings 611, 611B, 611C, 6 The partition members 6, 6C, 6D, 6E or the lids 62, 62B, 62C, 62D, 62E, excluding 11D and 611E, can be welded from the outside of the partition members 6, 6C, 6D, 6E, and the openings 611, 611B, 611C, 611D, 611E and the lids 62, 62B, 62C, 62D, 62E can be easily welded from the outside of the partition members 6, 6C, 6D, 6E.

[0099] Therefore, the floor plate 2, through holes 21, 21C, 21D, and 21E formed near the side outer plate GK1 through which the gas conduit 4 passes, and the hollow bulkhead members 6, 6C, 6D, and 6E, which are welded to the floor plate 2 around the through holes 21, 21C, 21D, and 21E and surround the gas conduit 4, thereby airtightly separating them from the passenger compartment 5, can be divided into a welding area YR1 on the inner circumference of the bulkhead members close to the side outer plate GK1 and a welding area YR2 on the outer circumference of the bulkhead members spaced apart from the side outer plate GK1 and close to the passenger compartment 5, with the openings 611, 611B, 611C, 611D, and 611E as the boundary, allowing the entire welding area YR to be easily welded in a continuous state.

[0100] Therefore, it is possible to provide railway vehicles 10, 10B, 10C, 10D, and 10E equipped with bulkhead members 6, 6C, 6D, and 6E that surround the gas conduit 4 and airtightly separate it from the passenger compartment 5, and which can be easily welded to a floor plate 2 that has through-holes 21, 21C, 21D, and 21E for the gas conduit 4 formed near the side outer plate GK1.

[0101] According to this embodiment, the bulkhead member 6 is formed as a flat, cylindrical body 6A, 6B that is long in the vehicle's longitudinal direction and short in the vehicle's width direction, so that it can accommodate multiple gas conduits 4 (for example, a supply gas conduit 4a and a filling gas conduit 4b). Therefore, while securing the space for the bulkhead member 6 to accommodate the gas conduits 4 (4a, 4b), the amount of protrusion of the bulkhead member 6 toward the passenger compartment 5 can be reduced, thereby improving the space efficiency of the passenger compartment 5. Furthermore, since the bulkhead members 6 are formed as flat cylindrical bodies 6A and 6B that are long in the vehicle longitudinal direction and short in the vehicle width direction, the welding length of the welding area YR1 on the inner circumference side of the bulkhead member that is close to the side outer plate GK1 within the welding area YR for welding the floor plate 2 and the bulkhead members 6 increases. However, since the openings 611A and 611B are open with a predetermined vertical width W1 from the front ends 6A1 and 6B1 in the vehicle longitudinal direction to the rear ends 6A2 and 6B2 of the cylindrical bodies 6A and 6B, a welding torch YT can be inserted into the hollow portion 6T of the bulkhead member 6 from the openings 611A and 611B, and the floor portion 22a near the side outer plate and the inner circumference portion 61a of the bulkhead member 6 near the side outer plate, excluding the openings 611A and 611B, can be easily welded from the inside of the bulkhead member 6.

[0102] According to this embodiment, the opening 611B is located near the upper part of the lower end 6B3 of the cylindrical body 6B, and extends from the front end 6B1 to the rear end 6B2 of the cylindrical body 6B with a predetermined vertical width W1. Therefore, with the entire lower end 6B3 of the cylindrical body 6B in contact with the floor plate 2, the floor plate 2 and the cylindrical body 6B can be easily and stably welded. Furthermore, since the entire circumference of the lower end 6B3 of the cylindrical body 6B is connected, the rigidity around the opening 611B of the cylindrical body 6B is improved, allowing for easy and accurate welding of the opening 611B and the lid portion 62B.

[0103] According to this embodiment, the bulkhead member 6C comprises a flat first plate wall portion 6C1 welded to the floor plate 2 along the side outer plate GK1, a protruding wall portion 6C2 of a predetermined cross-section welded to the front end portion 6C11 and the rear end portion 6C12 of the first plate wall portion 6C1 in the vehicle longitudinal direction above the floor plate 2 and projecting toward the passenger compartment 5, an opening 611C between the front end portion 6C11 and the rear end portion 6C12 of the first plate wall portion 6C11 that opens with a predetermined vertical width W1 from the lower end portion 6C21 of the protruding wall portion 6C2 down to the floor plate 2, and a cover portion 62C welded to the opening 611C from the passenger compartment 5 side and having the same cross-section as the protruding wall portion 6C2. Therefore, the bulkhead member 6C can be composed of a first plate wall portion 6C1 which can be formed from a flat plate material, a protruding wall portion 6C2 which can be formed by bending a flat plate material into a predetermined cross-section, and a cover portion 62C which can be formed by bending in the same way as the protruding wall portion 6C2. Therefore, the partition wall member 6C can be manufactured inexpensively using a simple-shaped plate material. Furthermore, since the partition wall member 6C can be formed into a simple cylindrical cross-section, it can be welded to the floor plate 2 more easily.

[0104] According to this embodiment, the bulkhead member 6D comprises a flat first plate wall portion 6D1 welded to the floor plate 2 along the side outer plate GK1, a pair of flat second plate wall portions 6D2 welded to the front end 6D11 and rear end 6D12 of the first plate wall portion 6D1 in the vehicle longitudinal direction, with their lower ends 6D21 welded to the floor plate 2 and each protruding toward the passenger compartment 5, and a flat third plate wall welded to both passenger compartment-side ends 6D22 of the second plate wall portion 6D2 above the floor plate 2. Since the partition wall member 6D comprises a section 6D3, an opening 611D that opens with a predetermined vertical width W1 from the lower end 6D31 of the third plate wall section 6D3 to the floor plate 2 between the two vehicle compartment-side ends 6D22 of the second plate wall section 6D2, and a flat cover section 62D welded to the opening 611D from the vehicle compartment 5 side, the partition wall member 6D can be composed of a first plate wall section 6D1, a second plate wall section 6D2, a third plate wall section 6D3, and a cover section 62D, each of which can be formed from a flat plate material. As a result, the partition wall member 6D can be manufactured inexpensively using a member with an even simpler shape. Furthermore, since the partition wall member 6D can be formed in a rectangular cross-section using a simple straight plate material, the partition wall member 6D can be welded linearly to the floor plate 2, making welding easier.

[0105] According to this embodiment, the bulkhead member 6E is welded to the side outer panel GK1 along the vehicle's vertical direction at both the front end 211E and the rear end 212E in the vehicle's longitudinal direction in the through hole 21E, and comprises a pair of flat wall plate portions 6E2 that project toward the passenger compartment 5, an opening 611E that opens toward the passenger compartment 5 along the vehicle's vertical direction between the passenger compartment side ends 6E21 of the wall plate portions 6E2, and a cover portion 62E welded to the opening 611E from the passenger compartment 5 side. Therefore, from the front end 211E to the rear end 212E of the through hole 21E, the side outer panel GK1 also serves as part of the bulkhead member 6E, simplifying the structure of the bulkhead member 6E. As a result, the bulkhead member 6E can be made lightweight and inexpensive to manufacture.

[0106] Within the welding area YR for welding the floor plate 2 and the bulkhead member 6E, in the welding area YR1 on the inner circumference side of the bulkhead member adjacent to the side outer plate GK1, with the opening 611E as the boundary, the floor portion 22a near the side outer plate and the inner circumference portion 61a of the wall plate portion 6E2 near the side outer plate can be easily welded from the inside of the wall plate portion 6E2 by inserting a welding torch YT between the wall plate portions 6E2 from the opening 611E that opens towards the passenger compartment 5. Furthermore, within the welding area YR for welding the floor plate 2 and the bulkhead member 6E, in the welding area YR2 on the outer circumference side of the bulkhead member that is spaced away from the side outer plate GK1 and close to the passenger compartment 5, with the opening 611E as the boundary, the floor portion 22b closer to the passenger compartment and the cover portion 62E of the floor plate 2 in which the through hole 21E is formed can be easily welded from the outside of the cover portion 62E, and the opening 611E and the cover portion 62E can also be easily welded from the outside of the cover portion 62E.

[0107] According to the manufacturing method of a railway vehicle according to this other embodiment, a first welding step S1 is performed to weld the welding area YR1 on the inner circumference side of the bulkhead member that is close to the side outer plate GK1, with the openings 611, 611B, 611C, 611D, and 611E as boundaries within the welding area YR for welding the floor plate 2 and the bulkhead members 6, 6C, 6D, and 6E, and a second welding step S2 is performed to weld the welding area YR2 on the outer circumference side of the bulkhead member that is spaced away from the side outer plate GK1 and close to the passenger compartment 5, so that through holes 21, 21C, 21 through which the gas conduit 4 penetrates are located near the side outer plate GK1. The floor plate 2, on which D and 21E are formed, and the hollow bulkhead members 6, 6C, 6D, 6E, which are welded to the floor plate 2 around the through holes 21, 21C, 21D, 21E and surround the gas conduit 4, creating an airtight partition from the passenger compartment 5, are divided into a welding area YR1 on the inner circumference of the bulkhead members that is close to the side outer plate GK1, and a welding area YR2 on the outer circumference of the bulkhead members that is spaced apart from the side outer plate GK1 and close to the passenger compartment 5, with the openings 611, 611B, 611C, 611D, 611E as the boundary, allowing the entire welding area YR to be easily welded in a continuous state.

[0108] Therefore, it is possible to provide a method for manufacturing railway vehicles 10, 10B, 10C, 10D, and 10E equipped with bulkhead members 6, 6C, 6D, and 6E that surround the gas conduit 4 and airtightly separate it from the passenger compartment 5, and which can be easily welded to a floor plate 2 that has through-holes 21, 21C, 21D, and 21E for the gas conduit 4 formed near the side outer plate GK1.

[0109] In the railway vehicle according to this embodiment and the manufacturing method of the railway vehicle according to the other embodiment described above, the railway vehicle and its manufacturing method are described as having bulkhead members 6, 6C, 6D, 6E, 6F that can be easily welded to a floor plate 2 in which through holes 21, 21C, 21D, 21E, 21F for gas conduits 4 are formed near the side outer plate GK1 constituting the side structure GK. However, the invention is not necessarily limited to this, and for example, the railway vehicle and its manufacturing method may also be described as having bulkhead members 6, 6C, 6D, 6E, 6F that can be easily welded to a floor plate 2 in which through holes 21, 21C, 21D, 21E, 21F for gas conduits 4 are formed near the end outer plate constituting the end structure TK. [Industrial applicability]

[0110] The present invention can be used as a railway vehicle equipped with a bulkhead member that encloses a gas conduit arranged between a high-pressure gas container mounted on the roof and a gas usage device installed under the floor, and airtightly partitions it from the passenger compartment, and as a method for manufacturing the railway vehicle. [Explanation of Symbols]

[0111] 1. High-pressure gas container 2 floorboards 3. Gas-using equipment, fuel cells 4 Gas pipelines 5 Cabin 6, 6C Partition Member 6D, 6E, 6F Partition members 6A, 6B Cylindrical bodies 6A1, 6B1 front end 6A2, 6B2 rear end 6B3 Bottom end 6C1, 6D1 First panel wall section 6C11, 6D11 front end 6C12, 6D12 rear end 6C2 Projecting wall part 6C21, 6D21, 6D31 Lower end 6D2 Second panel wall section 6D22 Cabin side end 6D3 Third panel wall section 6E2 Wall plate part 6E21 Cabin side end 6T hollow part 10, 10B, 10C Railway Vehicles 10D, 10E, 10F Railway Vehicles 21, 21C through hole 21D, 21E, 21F through hole 62, 62B, 62C Lid 62D, 62E Lid 211E Front end 212E rear end 611, 611B, 611C opening 611D, 611E opening DW frame GK side structure GK1 Side Panel S1 First welding process S2 2nd welding process ST body W1 Vertical width YK Roof Structure YK1 Roof Panel YR, YR1, YR2 welding areas

Claims

1. A railway vehicle equipped with a gas conduit arranged between a high-pressure gas container mounted on a roof panel constituting the roof structure and a gas usage device installed below the floor panel constituting the underframe, The floor plate has through-holes formed near the side outer plate constituting the side structure or the end outer plate constituting the end structure through which the gas conduit passes. The vehicle body is provided with a hollow bulkhead member that is welded to the floor plate around the through-hole, enclosing the gas conduit and airtightly separating it from the passenger compartment. The railway vehicle is characterized in that the bulkhead member comprises a welding opening in the hollow portion of the bulkhead member, located in close proximity to the through hole, and a cover portion welded to the opening from the passenger compartment side.

2. In the railway vehicle described in claim 1, The bulkhead member is formed as a flat, cylindrical body that is long in the longitudinal direction of the vehicle and short in the width direction of the vehicle, and the opening is open with a predetermined vertical width from the front end to the rear end in the longitudinal direction of the vehicle of the cylindrical body.

3. In the railway vehicle described in claim 2, The railway vehicle is characterized in that the opening is located near the upper part of the lower end of the cylindrical body and extends from the front end to the rear end of the cylindrical body with a predetermined vertical width.

4. In the railway vehicle described in claim 1, The bulkhead member is characterized by comprising: a flat first plate wall portion welded to the floor plate along the side outer plate; a protruding wall portion of a predetermined cross-section welded to the front and rear ends of the first plate wall portion in the vehicle longitudinal direction above the floor plate and projecting toward the passenger compartment; an opening between the front and rear ends of the first plate wall portion, opening with a predetermined vertical width from the lower end of the protruding wall portion to the floor plate; and a cover portion welded to the opening from the passenger compartment side and having the same cross-section as the protruding wall portion.

5. In the railway vehicle described in claim 1, The bulkhead member is characterized by comprising: a flat first plate wall portion welded to the floor plate along the side outer plate; a pair of flat second plate wall portions welded to the front and rear ends of the first plate wall portion in the vehicle longitudinal direction, with their lower ends welded to the floor plate and each protruding toward the passenger compartment side; a flat third plate wall portion welded to both passenger compartment side ends of the second plate wall portion above the floor plate; an opening between the two passenger compartment side ends of the second plate wall portion, with a predetermined vertical width extending from the lower end of the third plate wall portion to the floor plate; and a flat cover portion welded to the opening from the passenger compartment side.

6. In the railway vehicle described in claim 1, The bulkhead member is characterized by comprising a pair of flat wall plate portions that are welded to the side outer plate along the vertical direction of the vehicle at both the front and rear ends in the longitudinal direction of the vehicle in the through hole and project toward the passenger compartment, an opening that opens toward the passenger compartment along the vertical direction of the vehicle between the passenger compartment-side ends of the wall plate portions, and a cover portion welded to the opening from the passenger compartment side.

7. In a method for manufacturing a railway vehicle according to any one of claims 1 to 6, A method for manufacturing a railway vehicle, comprising: a first welding step of welding a welding area on the inner circumference side of the bulkhead member that is close to the side outer plate, with the opening as the boundary, within the welding area for welding the floor plate and the bulkhead member; and a second welding step of welding a welding area on the outer circumference side of the bulkhead member that is spaced away from the side outer plate and close to the passenger compartment.

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