JP2024014259A - Rail vehicle and rail vehicle manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rail vehicle facilitating attachment/detachment of a reinforcement material to/from an extruded hollow shape material.

SOLUTION: A railway vehicle includes a vehicle body structure which is at least partly composed of an extruded hollow shape material 100. The railway vehicle includes: a reinforcement material 50a, which is arranged in a columnar hollow part of the extruded hollow shape material 100 to extend along an extending direction of the columnar hollow part; and a foamed material 52, which is arranged in the columnar hollow part to press the reinforcement material 50a onto a surface plate 81 serving as a shape wall part for surrounding the columnar hollow part.

SELECTED DRAWING: Figure 4

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a rail vehicle and a method for manufacturing a rail vehicle.

The structure of a rail vehicle (hereinafter referred to as a vehicle structure), including a railway vehicle, generally consists of an underframe that forms the floor, and an underframe that stands up at the widthwise end of the underframe and forms the sides. It consists of a side structure, an end structure erected at the longitudinal end of the underframe, and a roof structure provided above the side structure and the end structure. In recent years, with the aim of reducing weight and improving manufacturability, a method of constructing roof structures, side structures, underframes, etc. using extruded hollow aluminum alloy members and assembling them into vehicle structures has become widespread. The extruded hollow member is composed of two face plates facing each other and a plurality of ribs connecting these face plates, and can reduce the weight of the vehicle structure.

In recent years, railway vehicles have tended to operate at higher speeds, and the airtight pressure load caused by the pressure difference inside and outside the vehicle when passing through a tunnel is increasing. Therefore, in order to improve driving safety and ride comfort, it is necessary to increase the rigidity of the vehicle structure. One way to increase the rigidity of a vehicle body using an extruded hollow member is to increase the thickness of the extruded hollow member. However, since extruded hollow members have a uniform cross section in the extrusion direction, even if it is desired to increase the thickness in a part of the extrusion direction, the thickness must be increased over the entire length in the extrusion direction, and the structure lead to weight increase. Furthermore, in order to increase the thickness of the extruded hollow profile, it is necessary to newly manufacture an extrusion die, which results in an increase in manufacturing costs. Therefore, the challenge is to develop a method to increase the rigidity of the structure while suppressing an increase in its weight and manufacturing cost.

In order to solve these problems, the structure is characterized by attaching a reinforcing material made of carbon fiber reinforced plastic (CFRP), which is lighter and more rigid than aluminum, to the extruded hollow member. A vehicle body structure is disclosed in Patent Document 1.

JP2013-86588A

Conventionally, reinforcing materials made of resin such as CFRP are attached to extruded hollow members using adhesives or mechanical fastening such as bolts or rivets. When mechanical fastening such as adhesives or bolts is used, the reinforcing material and the extruded hollow member can be firmly fixed, but on the other hand, a large amount of cost is required for bonding work and bolt tightening. Further, from the viewpoint of recycling, it is preferable that members made of different materials such as aluminum and CFRP be easily separated into separate materials.

A rail vehicle according to an aspect of the present invention is a rail vehicle in which at least a portion of a vehicle body is made of an extruded hollow section, and wherein the vehicle body is disposed in a columnar hollow section of the extruded hollow section, and is arranged in a columnar hollow section of the extruded hollow section. The reinforcing material extends along the direction in which the reinforcing material is located, and a foam material is provided in the columnar hollow part and presses the reinforcing material against a shape wall part surrounding the columnar hollow part.
A method for manufacturing a rail vehicle according to an aspect of the present invention includes joining the extruded hollow sections to form a panel of the vehicle structure, and inserting the reinforcing material into the columnar hollow section of the extruded hollow sections. closing one end of the columnar hollow portion into which the reinforcing material is inserted; injecting the foam material into the columnar hollow portion; and closing one end of the columnar hollow portion into which the reinforcing material is inserted. and closing the other end.

According to the present invention, it becomes easy to attach and separate a reinforcing material to an extruded hollow profile used in a rail vehicle.

FIG. 1 is a side view of the vehicle structure of a railway vehicle, viewed from the side. FIG. 2 is a sectional view taken along line AA in FIG. FIG. 3 is a view of the underframe viewed from below the vehicle. FIG. 4 is a sectional view showing a cross section of the extruded hollow member perpendicular to the extrusion direction. FIG. 5 is a diagram showing modification example 1. FIG. 6 is a diagram showing a second modification. FIG. 7 is a diagram showing a case where three separate reinforcing members are used in Modification 2. FIG. 8 is a flow chart showing the procedure for attaching reinforcing material and foam material to an extruded hollow profile.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The following description and drawings are examples for explaining the present invention, and are omitted and simplified as appropriate for clarity of explanation. Furthermore, in the following description, the same or similar elements and processes may be denoted by the same reference numerals, and redundant explanations may be omitted. The content described below is merely an example of the embodiment of the present invention, and the present invention is not limited to the embodiment described below, and can be implemented in various other embodiments. It is possible.

First, a rail vehicle is a general term for vehicles that operate along laid tracks, and includes railway vehicles, monorail vehicles, vehicles of new transportation systems, etc. In the following, a railway vehicle running at high speed will be described as a representative example of a rail vehicle. Note that the directions in each figure are defined as follows. The longitudinal direction of the railway vehicle (vehicle longitudinal direction along the rails) is defined as the x direction, the width direction of the railway vehicle is defined as the y direction, and the vehicle height direction perpendicular to the x and y directions is defined as the z direction.

FIG. 1 is a side view of the railway vehicle 1 seen from the side. The vehicle structure of the railway vehicle 1 includes an underframe 10 forming the floor surface, a pair of side structures 20 erected at both ends of the underframe 10 in the y direction (width direction), and It has a hexahedral structure composed of a pair of end structures 30 erected at both ends in the front-rear direction), and a roof structure 40 provided at the upper ends of the side structures 20 and the end structures 30. The side structure 20 includes a plurality of windows 22 and a plurality of entrances and exits 24 for passengers and the like to board and exit the vehicle. The railway vehicle 1 includes bogies 7 that support the railway vehicle 1 at both end regions in the x direction (vehicle longitudinal direction). The truck 7 includes wheels 70 that roll on the track 5.

FIG. 2 is a sectional view taken along line AA in FIG. The underframe 10 includes a floor material 15 and a pair of side beams 11 provided at the edges of the floor material 15 in the width direction (y direction). An upper floor 60 is provided on the upper part of the underframe 10. In FIG. 2, the body structure in the range indicated by the symbol a is the side structure 20, and the range indicated by the symbol b is the roof structure 40. The flooring 15, the side structures 20, and the roof structure 40 are constructed of extruded hollow members consisting of two opposing face plates and a plurality of connecting ribs that connect these face plates. In the extruded hollow members used for the flooring 15, the side structures 20, the end structures 30, the roof structures 40, etc., the direction in which the connecting ribs extend, that is, the direction of extrusion is the x direction.

FIG. 3 is a view of the underframe 10 of FIG. 1 viewed from below the vehicle in the direction of arrow B, and is a view showing the lower surface side of the underframe 10. As shown in FIG. The underframe 10 includes a floor material 15 extending in the x direction, a pair of side beams 11, a pair of end beams 12, two pairs of middle beams 13, and a pair of pillow beams 14. The floor material 15 is made of a plurality of extruded hollow shapes, and the floor material 15 of a predetermined size is formed by joining the plurality of extruded hollow shapes. The side beam 11 is provided at the edge of the floor material 15 in the vehicle width direction (y direction). The end beam 12 is provided at the edge of the floor material 15 in the longitudinal direction (x direction). The pillow support 14 is provided so as to extend in the vehicle width direction (y direction), and is connected to the pair of side beams 11 . The middle beam 13 connects the center portion of the end beam 12 in the y direction and the center portion of the pillow beam 14. The pillow support 14 placed on the upper part of the truck 7 is provided with a center pin seat 7b at the center, and air spring seats 7a at both ends in the y direction. Although not shown, a coupler for connecting the railway vehicles 1 to each other is accommodated between a pair of middle beams 13 arranged in the y direction.

The large compressive and tensile loads acting between the railway vehicles 1 act on the middle beam 13 via the coupler. Therefore, the underframe 10 including the center beam 13 is required to have high rigidity in the x direction. Further, as shown in FIG. 1, the underframe 10 between the pair of pillow supports 14 is equipped with heavy electrical components and the like, so it is desired that the underframe 10 has high rigidity along the x direction.

FIG. 4 is a sectional view showing a cross section orthogonal to the extrusion direction of an extruded hollow member 100 used for the flooring 15, the side structures 20, the end structures 30, the roof structures 40, and the like. For example, it is a CC cross-sectional view of the flooring material 15 shown in FIG. The extruded hollow member 100 includes a pair of face plates 80 and 81 facing each other and a plurality of connecting ribs 82 that connect the face plates 80 and 81, and a columnar hollow part is formed in the extrusion direction. A curtain rail 85 is provided on the face plate 81 side.

A flat reinforcing material 50a extending in the extrusion direction of the profile and a foam material 52 are enclosed in at least one of the plurality of columnar hollows surrounded by the face plate 81 and the two connecting ribs 82. Ru. In the extruded hollow member 100 in the area shown in FIG. 4, there are ten columnar hollow parts with a triangular cross-sectional shape, one of which is filled with a reinforcing material 50a and a foam material 52. . From the viewpoint of improving the strength of the floor material 15, the reinforcing material 50a and the foam material 52 preferably extend from one end of the columnar hollow part to the other end. It may be arranged in a part up to the end. The reinforcing material 50a is made of a material that is lighter and more rigid than aluminum, such as CFRP. Furthermore, the foam material 52 is made of lightweight foamed resin such as urethane or polyvinyl chloride.

The reinforcing material 50a is fixed so as to be pressed against the face plate 81 by pressure 87 when the foamed material 52 foams and expands. Therefore, when the face plate 81 is deformed by an external force, the reinforcing member 50a pressed against the face plate 81 also receives force via the face plate 81. In this way, the reinforcing material 50a bears part of the force applied to the face plate 81, so that the rigidity of the face plate 81, that is, the rigidity of the flooring 15 can be improved. As a result, the rigidity of the underframe 10 including the floor material 15 can be improved, and the safety and riding comfort of the railway vehicle 1 can be improved.

Since the reinforcing material 50a is made of a resin material such as CFRP, which has a lower density than aluminum, and the foamed material 52 is made of foamed resin, an increase in the weight of the structure during reinforcement can be suppressed. Furthermore, since the extruded hollow profile 100 manufactured using an existing extrusion mold can be reinforced for rigidity, there is no need to manufacture a new extrusion mold, and an increase in the manufacturing cost of the structure can be prevented. Furthermore, since the reinforcing material 50a is fixed to the face plate 81 using pressure 87 when the foam material 52 expands, the reinforcing material 50a can be fixed to the face plate 81 without using adhesive or mechanical fastening methods. It can be fixed at 81.

Moreover, when separating the reinforcing material 50a from the flooring material 15, it can be easily separated by performing the following operations. Since the reinforcing material 50a is pressed against the face plate 81 by the pressure 87 generated by the foamed material 52, the reinforcing material 50a can be easily separated from the flooring 15 by cutting off the source of the pressure 87 or weakening the pressure 87. can do. For example, the pressure 87 can be weakened by inserting a metal rod heated above the melting point of the foam material 52 into the foam material 52 and melting a portion of the foam material 52. Alternatively, by heating the entire flooring material 15 provided with the reinforcing material 50a and the foamed material 52 to a temperature higher than the melting point of the foamed material 52, the foamed material 52 will melt and the reinforcing material 50a and the flooring material 15 can be easily separated. can do.

The fact that the reinforcing material 50a can be easily separated in this way is particularly advantageous in terms of recyclability. By separating components made of different materials such as aluminum and CFRP without leaving impurities in each material, recycling costs can be reduced. In this embodiment, since no adhesive is used to fix the reinforcing material 50a, there is no microscopic chemical bond between the reinforcing material and the object to be reinforced. In addition, since the pressure 87 that presses the reinforcing material 50a against the face plate 81 can be easily removed or reduced, the extruded hollow member 100 has excellent recyclability.

In addition, although this embodiment described the reinforcement structure of the extruded hollow shape material 100 used for the flooring material 15, the site|part targeted for reinforcement is not limited to the flooring material 15. Also for members constituted by an extruded hollow member 100 consisting of two face plates and a plurality of ribs connecting these face plates, specifically the pillow beam 14, the side structure 20, the end structure 30, and the roof structure 40. , the reinforcement structure described above can be applied.

Further, in the example shown in FIG. 4, the reinforcing material 50a and the foamed material 52 are enclosed in one columnar hollow part surrounded by the face plate 81 and two connection ribs 82, but the reinforcing material 50a and the foamed material 52 are It may be enclosed in one or more columnar hollow parts surrounded by at least two of the connecting ribs 80 and 81 and the connecting ribs 82. For example, approximately in the center of the area shown in FIG. The foam material 52 may be enclosed so that the reinforcing material 50a is pressed against it.

The reinforcing material 50a and the foam material 52 are inserted in the parts where the rigidity is required to be improved through numerical analysis or experiments, thereby effectively reinforcing the structure while suppressing an increase in the weight of the structure. Furthermore, a desired object may be selected from the face plates 80, 81 and the connection rib 82 as the object to which the reinforcing material 50a is pressed. For example, in the example shown in FIG. 4, the reinforcing material 50a is pressed against the face plate 81 of the three wall parts (face plate 81, two connecting ribs 82) surrounding the columnar hollow part, but two of the three wall parts A structure may be adopted in which the reinforcing material 50a is pressed against each of the above wall portions.

(Modification 1)
FIG. 5 is a diagram showing a first modification of the above-described embodiment, and is a sectional view (CC sectional view) of the same location as in FIG. 4. Modification 1 differs from the above-described embodiment in that triangular prism-shaped reinforcing members 50b are arranged at the corners of the columnar hollow portions. The triangular prism-shaped reinforcing member 50b is arranged to face the corner of the columnar hollow portion, that is, the node 84a where the two connecting ribs 82 connect with the face plate 81. Two side surfaces of the triangular prism-shaped reinforcing member 50b face the two connecting ribs 82. The reinforcing material 50b is pressed against a portion of the two connecting ribs 82 connected to the node 84a and the wall surface of the node 84a by pressure 87 when the foam material 52 foams and expands.

By arranging the reinforcing material 50b in such a configuration, the rigidity of the node 84a between the face plate 81 and the connecting rib 82 in the floor material 15 can be reinforced, and safety and riding comfort during vehicle running can be improved. can be achieved. Generally, stress tends to concentrate at the node between the connecting rib and the face plate, and by reinforcing the node 84a with the configuration of Modification 1, the strength and reliability of the vehicle can be increased. In addition, in the triangular prism-shaped reinforcing material 50b, the R shape (R radius and opening angle) of the top facing the node 84a is made approximately equal to the radius shape of the node 84a, thereby effectively reinforcing the node 84a. be able to.

In the example shown in FIG. 5, the reinforcing material 50b and the foamed material 52 are arranged in one of the three columnar hollow parts in contact with the node 84a, but the reinforcing material 50b is placed in the other columnar hollow parts indicated by symbols S1 and S2. The foamed material 52 may also be arranged to reinforce the node 84a with the reinforcing material 50b. Further, the reinforcing material 50b may be arranged not only at one location but at two or more locations among the three corners of the columnar hollow section.

Although the reinforcement structure of the extruded hollow profile 100 constituting the flooring 15 has been described in FIG. 5, the reinforcement target area is not limited to the flooring 15, but also the pillow 14 in which the extruded hollow profile 100 is used. , the side structure 20, the end structure 30, and the roof structure 40. Furthermore, although the triangular prism-shaped reinforcing member 50b is applied to the node 84a on the face plate 81 side, it may be applied to the node 84b on the face plate 80 side, for example.

(Modification 2)
In the example shown in FIG. 4 described above, the reinforcing material 50a is pressed against at least one of the three walls (second face plate 81, two connection ribs 82) surrounding the columnar hollow part. Each of the three corners of the triangular prism-shaped hollow portion corresponds to a node, and in the example shown in FIG. 5, a triangular prism-shaped reinforcing member 50b is arranged at at least one of the three corners. In Modified Example 2, reinforcing materials are provided on both the three flat wall surfaces surrounding the columnar hollow portion and the three corner wall surfaces.

FIG. 6 is a diagram showing modification example 2, and is a sectional view (CC sectional view) of the same location as in FIGS. 4 and 5. In FIG. 6, two separate reinforcing members 50c1 and 50c2 extending in the extrusion direction are provided in a columnar hollow portion surrounded by a face plate 81 and two connecting ribs 82. The reinforcing member 50c1 is arranged at the upper corner in the drawing of the triangular prism-shaped hollow part. The reinforcing member 50c1 includes a convex reinforcing portion 501 pressed against the node 84b, and a pair of plate-shaped reinforcing portions 500 pressed against a pair of connecting ribs 82 connected to the node 84b. On the other hand, the reinforcing member 50c2 is arranged to face the face plate 81. The reinforcing member 50c2 includes a convex reinforcing part 501 that is arranged at a pair of lower corners of the triangular prism-shaped hollow part and pressed against the node points 84a and 84c, and a pair of plate-shaped reinforcing parts that are pressed against a pair of connecting ribs 82. section 500, and a plate-shaped reinforcing section 500 that is pressed against the face plate 81.

In this way, the two reinforcing materials 50c1 and 50c2 constitute a triangular pipe-shaped reinforcing material surrounding a triangular prism-shaped hollow portion extending in the extrusion direction. The foam material 52 is placed in a hollow portion surrounded by a triangular pipe-shaped reinforcing material. The reinforcing materials 50c1 and 50c2 are pressed against the face plate 81, the pair of connecting ribs 82, and the nodes 84a to 84c by pressure 87 when the foamed material 52 foams and expands. As a result, in Modification 2, it is possible to simultaneously reinforce the wall portion surrounding the columnar hollow portion (second face plate 81, pair of connecting ribs 82) and the node points 84a to 84c where stress tends to concentrate.

In the example shown in FIG. 6, the two separated reinforcing materials 50c1 and 50c2 constitute a triangular pipe-shaped reinforcing material, but as shown in FIG. The reinforcing material may be configured as follows. Each reinforcing member 50d1, 50d2, 50d3 includes a pair of plate-shaped reinforcing parts 500 and a convex reinforcing part 501 connecting them. By using reinforcing members arranged in a triangular pipe shape as shown in FIGS. 6 and 7, the rigidity of the face plates 80, 81, connecting ribs 82, and nodes 84a to 84c of the extruded hollow member 100 can be reinforced, and the 1. It is possible to improve safety and ride comfort during driving.

In addition, in the second modification, the triangular pipe-shaped reinforcing member is configured by a plurality of separated reinforcing members, but it is also possible to use one integrated triangular pipe-shaped reinforcing member. However, in the case of an integrated triangular pipe-shaped reinforcement, the resistance of the triangular pipe-shaped reinforcement against the pressure 87 of the foam material 52 becomes large, and the walls (face plate and connecting ribs) around the triangular prism-shaped hollow part and Pressure against the corner wall (node point) may be insufficient. Therefore, as in Modification 2, it is preferable to configure a triangular pipe-shaped reinforcing member with a plurality of separated reinforcing members.

In FIGS. 6 and 7, the extruded hollow profile 100 used for the flooring 15 is explained as an example, but the extruded hollow profile 100 is not limited to the flooring 15. It can also be applied to the gable structure 30, roof structure 40, etc. In addition, the reinforcing material in the shape of a triangular pipe separated into a plurality of parts is applied to the triangular prism-shaped hollow portion surrounded by the face plate 81 and the pair of connecting ribs 82, but of course it can also be applied to the triangular prism-shaped hollow portions in other locations. be able to.

<Production method>
FIG. 8 is a flowchart showing the procedure for attaching reinforcing material and foam material to the extruded hollow profile 100. In step S10, a panel constituting the flooring 15 is manufactured by arranging and joining the extruded hollow shapes 100. In step S20, reinforcing materials 50 (50a, 50b, 50c1, 50c2, 50d1 to 50d3) are inserted into the hollow portions (columnar hollow portions) of the flooring 15 where strength is desired to be increased. In step S30, one end of the columnar hollow portion into which the reinforcing material 50 has been inserted is closed. In step S40, the foam material 52 is injected into the hollow portion into which the reinforcing material 50 has been inserted. In step S50, the other end of the hollow portion into which the reinforcing material 50 has been inserted is closed.

In addition, although the procedure was explained above using the floor material 15 as an example, the steps for attaching the reinforcing material 50 to the extruded hollow shapes 100 that constitute the pillow beams 14, the side structures 20, the end structures 30, and the roof structures 40 are also explained. The same can be applied. By attaching the reinforcing material 50 to the extruded hollow shaped material 100 using the above manufacturing method, the rigidity of the extruded hollow shaped material 100 is reinforced, and the reinforcing material 50 can be easily attached to and separated from the extruded hollow shaped material 100. Vehicles can be provided.

According to the embodiments and modifications of the present invention described above, the following effects are achieved.

(C1) As shown in FIGS. 1 and 4, a railway vehicle 1 in which at least a part of the vehicle structure is made of an extruded hollow member 100 is arranged in a columnar hollow part of the extruded hollow member 100, and A reinforcing material 50a extending along the extending direction of the section, and a foam material 52 disposed in the columnar hollow section and pressing the reinforcing material 50a against a face plate 81 which is a wall section surrounding the columnar hollow section. .

The reinforcing material 50a pressed against the face plate 81 by the foam material 82 will bear part of the force when force is applied to the face plate 81. Therefore, it is possible to improve the rigidity of the structure of the railway vehicle, and it is possible to improve safety and ride comfort when the railway vehicle 1 is running. Since the reinforcing material 50a is fixed to the face plate 81 by pressure 87 when the foam material 52 expands, the reinforcing material 50a can be easily fixed to the face plate 81 without using adhesive or mechanical fastening methods. can. Furthermore, by melting part or all of the foam material 52 with heat, the reinforcing material 50a and the extruded hollow member 100 of the flooring material 15 can be easily separated.

(C2) In (C1) above, as shown in FIG. 4, the reinforcing material 50a is a flat reinforcing material that is pressed against the face plate 81, which is a planar area of the wall of the profile surrounding the columnar hollow part. By pressing the reinforcing material 50a against the face plate 81, the rigidity of the face plate 81 can be improved.

(C3) In the above (C1), as shown in FIG. 5, the columnar hollow part is a triangular prism-shaped hollow part, and the reinforcing material 50b is a shape wall part surrounding the corner of the triangular prism-shaped hollow part, that is, a nodule part. This is a triangular prism-shaped reinforcing material that is pressed against the wall portion at 84a. By pressing the reinforcing material 50b against the knot 84a where stress tends to concentrate, the strength of the knot 84a is reinforced.

(C4) In the above (C1), as shown in FIG. 6, the reinforcing members 50c1 and 50c2 are pipe-shaped reinforcing members, and the foam material 52 is arranged in the surrounding space surrounded by the pipe-shaped reinforcing members 50c1 and 50c2. be done. By making the reinforcing members 50c1 and 50c2 pipe-shaped, in addition to reinforcing the entire wall surrounding the columnar hollow part, that is, reinforcing the planar wall part (face plate 81, connection rib 82), the nodal points 84a to 84c can also be reinforced.

(C5) In the above (C4), as shown in FIG. 6, the pipe-shaped reinforcing members 50c1 and 50c2 are divided reinforcing members extending along the extending direction of the columnar hollow part, that is, two separated reinforcing members. It is constructed by arranging materials 50c1 and 50c2 in a ring shape. Since the two reinforcing members 50c1 and 50c2 are separated, the foamed material 52 can effectively press the opposing wall portions of the reinforcing members 50c1 and 50c2, respectively.

(C6) In the above (C1), as shown in FIG. 4, the reinforcing material 50a is formed of carbon fiber reinforced plastic. By forming the reinforcing material 50a from CFRP, which has a lower density than the aluminum used for the extruded hollow member 100, it is possible to suppress an increase in the weight of the structure due to the use of the reinforcing material.

(C7) The method for manufacturing a railway vehicle according to (C1) above, which includes joining the extruded hollow sections 100 to form a panel of the vehicle structure, and forming a columnar shape of the extruded hollow sections 100, as shown in FIG. Inserting the reinforcing material 50 into the hollow part, closing one end of the columnar hollow part into which the reinforcing material 50 is inserted, injecting the foam material 52 into the columnar hollow part, and inserting the reinforcing material 50 into the hollow part. and closing the other end of the inserted columnar hollow. By manufacturing according to such a procedure, it is possible to easily construct a railway vehicle using the extruded hollow member 100 in which the reinforcing material 50 and the foamed material 52 are provided in the columnar hollow part.

The embodiments and various modifications described above are merely examples, and the present invention is not limited to these contents as long as the characteristics of the invention are not impaired. Furthermore, although various embodiments and modifications have been described above, the present invention is not limited to these. Other embodiments considered within the technical spirit of the present invention are also included within the scope of the present invention.

DESCRIPTION OF SYMBOLS 1... Railway vehicle, 5... Track, 7... Bogie, 7a... Air spring seat, 7b... Center pin seat, 10... Underframe, 11... Side beam, 12... End beam, 13... Middle beam, 14... Pillow beam, 15... Floor material, 20... Side structure, 22... Window, 24... Entrance/exit, 30... End structure, 40... Roof structure, 50, 50a, 50b, 50c1, 50c2, 50d1 to 50d3... Reinforcement material, 52... Foaming material , 60... Upper floor, 70... Wheel, 80, 81... Face plate, 82... Connection rib, 84a to 84c... Node point

Claims (7)

A rail vehicle in which at least a portion of the vehicle structure is made of an extruded hollow section,
A reinforcing material disposed in the columnar hollow part of the extruded hollow member and extending along the extending direction of the columnar hollow part;
A rail vehicle comprising: a foam material disposed in the columnar hollow part and pressing the reinforcing material against a profile wall surrounding the columnar hollow part. The rail vehicle according to claim 1,
In the rail vehicle, the reinforcing material is a flat reinforcing material that is pressed against a planar region of the profile wall surrounding the columnar hollow part. The rail vehicle according to claim 1,
The columnar hollow portion is a triangular columnar hollow portion,
In the rail vehicle, the reinforcing material is a triangular prism-shaped reinforcing material that is pressed against a section wall surrounding the corner of the triangular prism-shaped hollow part. The rail vehicle according to claim 1,
The reinforcing material is a pipe-shaped reinforcing material,
The said foam material is arrange|positioned in the surrounding space enclosed by the said pipe-shaped reinforcement material. The rail vehicle according to claim 4,
In a rail vehicle, the pipe-shaped reinforcing member is configured by arranging a plurality of split reinforcing members in a ring shape extending along the extending direction of the columnar hollow part. The rail vehicle according to claim 1,
In a rail vehicle, the reinforcing material is made of carbon fiber reinforced plastic. A method for manufacturing a rail vehicle according to claim 1, comprising:
joining the extruded hollow sections to form a panel of the vehicle structure;
Inserting the reinforcing material into the columnar hollow part of the extruded hollow section;
closing one end of the columnar hollow portion into which the reinforcing material is inserted;
Injecting the foam material into the columnar hollow part;
closing the other end of the columnar hollow portion into which the reinforcing material is inserted;
A method of manufacturing a rail vehicle including.

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