JP2008168732A - Vehicle structure - Google Patents

Abstract

Provided is a vehicle structure having a strength required for vertical load and vibration while suppressing an increase in weight of the structure.
A side structure 2 and a frame 7 are coupled via an L-shaped bracket 10 at an entrance / exit 6 of a railway vehicle structure 20 in which the side structure 2 is formed of a hollow shape member. The L-shaped metal fitting 10 butt-joins the frame 7 with a plate-like first joint 10 a that joins the vehicle outer side plate 8 and the vehicle inner side plate 9, and a portion of the first joint 10 a from the vehicle outer side plate 8. It consists of the 2nd junction part board 10b. The plate thickness of the second joint portion plate 10 b is thicker than the plate thickness of the vehicle outer side plate 8. Thereby, the strength required for the load in the vertical direction can be ensured without increasing the thickness of the vehicle outer side face plate 8, that is, without increasing the weight of the structure.
[Selection] Figure 2

Description

  The present invention relates to a vehicle structure that forms a rail vehicle such as a railway vehicle or a monorail car, and more particularly to a vehicle structure that is formed by joining, for example, a hollow shape member made of an aluminum alloy.

  The vehicle structure includes a roof structure that forms an upper surface, two side structures that form a side surface, a base frame that forms a lower surface, and two wife structures that form end faces in the longitudinal direction.

  In recent years, for the main purpose of reducing the weight and improving the productivity of rail vehicles, hollow extruded profiles made of aluminum alloy are used for roof structures, side structures and underframes, and extruded profiles with ribs made of aluminum alloy are used for wife structures. Came to use. Such a vehicle body structure of a rail vehicle is disclosed in Patent Document 1, for example.

Further, the doorway provided in the side structure of the vehicle structure is formed by providing an opening in the hollow shape member of the side structure, and welding and reinforcing a thick doorway frame in the opening. Such an entrance / exit structure is disclosed in Patent Document 2, for example.
Japanese Patent No. 2604226 Japanese Patent No. 3751236

  The rail vehicle structure is subject to static load in the vertical direction due to the riding of personnel, or dynamic load caused by vertical vibrations associated with the travel when traveling on the rail. It is necessary to ensure the necessary strength against such loads. The structural parts that are severe in strength due to these loads are two side structures that fully support these loads. In particular, the vicinity of the entrance / exit of the side structure in which a large opening is formed for passengers / occupants getting on and off is exposed to the most severe conditions in terms of strength because static or dynamic deformation is concentrated. For this reason, the periphery of the entrance / exit of the side structure is generally constituted by a strong frame. The technical circumstances that are severe in terms of strength will be described later with reference to FIG.

  The entrance / exit frame and the side structure are connected by extending the face plate of the hollow shape member constituting the side structure to the entrance / exit frame side, placing it on a seat existing in the entrance / exit frame, and butt-welding the tip. As a result, deformation is concentrated and high stress is generated by the load in the vertical direction on the face plate sandwiched between the strong hollow shape member and the entrance / exit frame. Further, in order to prevent this, if the thickness of the hollow shape face plate is increased over the entire surface, the mass of the structure is significantly increased.

  An object of the present invention is to provide a vehicle structure capable of ensuring a necessary strength against a load in the vertical direction while suppressing an increase in the weight of the rail vehicle structure, particularly around the entrance / exit of the side structure. .

  In order to achieve the above object, the vehicle is composed of a hollow member composed of a vehicle outer side plate, a vehicle inner side plate, and a plurality of ribs connecting the both side plates, and includes a side structure in which an entrance is formed to be open, A vehicle structure in which an entrance / exit frame is fixed to the vehicle exterior side plate and the vehicle interior side plate of the hollow shape member along an entrance edge of the entrance / exit, wherein the vehicle exterior side plate and the vehicle interior side plate are at the opening edge. Welded by a joining member, and the joining member includes a first joining portion that joins the vehicle outer side plate and the vehicle inner side plate, a portion of the first joining portion from the vehicle outer plate, and the entrance / exit frame. It can achieve by comprising the 2nd junction part which couple | bonds with the vehicle exterior side.

  According to the present invention, since it is not necessary to increase the thickness of the vehicle outer side plate and the vehicle inner side plate of the side structure, the vehicle structure having the necessary strength against the load in the vertical direction while suppressing an increase in the weight of the structure. Can be provided.

  That is, according to this vehicle structure, since the two face plates of the hollow shape material are joined at the first joint portion, it can counter the load in the vertical direction, and the two face plates may be thin, The side structure can be configured to be lightweight.

  In addition, by increasing the thickness of the second joint portion, it is possible to suppress the concentration of deformation and the generation of high stress in this part.

  Embodiments 1 to 3 of a rail vehicle structure according to the present invention will be described below with reference to the drawings.

  A first embodiment of the present invention will be described with reference to FIGS.

  In the embodiment shown in FIG. 1, a rail vehicle structure 20 includes a roof structure 1 constituting the upper surface, two side structures 2, 2 constituting the side surface, a frame 3 constituting the lower surface, and two sheets constituting the end surface. It consists of wife structures 4 and 4.

  The roof structure 1, the side structures 2, 2, the underframe 3, and the end structures 4, 4 are each configured by joining (welding or friction stir welding) a plurality of extruded shapes.

  The extruded shape members constituting the roof structure 1, the side structures 2, 2 and the frame 3 are hollow shapes made of aluminum alloy, and the extrusion direction of the hollow shapes is the longitudinal direction of the railway vehicle structure 20. . The extruded shape members constituting the end structures 4 and 4 are single shapes with ribs made of aluminum alloy, and the extrusion direction of the single shape members is the vertical direction of the railway vehicle structure 20.

  The deformation state with respect to the load in the vertical direction of the rail vehicle structure 20 will be described with reference to FIG. FIG. 3 is a side view of the rail vehicle structure. The rail vehicle structure 20 is supported by the traveling device at the center in the front-rear direction (longitudinal direction of the rail vehicle structure) of the pillow beams 17 and 17. In addition to the rail vehicle structure 20, a load in the vertical direction of the rail vehicle structure 20 due to a riding member such as an electric device or a person riding is applied to the rail vehicle structure 20. Due to the load in the vertical direction, the rail vehicle structure 20 is deformed between the pillow beams 17 and 17 so that the downward direction is convex. In particular, at the entrances 6 and 6 having large openings for passengers / occupants to get on and off, this deformation is concentrated. For this reason, strong entrance / exit frames (hereinafter abbreviated as “frames”) 7 and 7 are installed and fixed around the entrances 6 and 6.

  As shown in FIG. 2, the side structure 2 is formed of a hollow member composed of two face plates, an outer side face plate 8 and an inner side face plate 9, and a plurality of ribs 16 that couple the two face plates 8, 9. The side structure 2 is further provided with an entrance 6. Conventionally, the frame 7 arranged along the opening edge of the entrance / exit 6 is directly joined to the side structure 2 by welding or friction stir welding to the vehicle exterior side plate 8 and the vehicle interior side plate 9 which are hollow shaped members. It is a thing. In the rail vehicle structure 20 according to the present invention, the side structure 2 and the frame 7 are coupled via an L-shaped bracket 10. In the present embodiment, the L-shaped bracket 10 is a member having an L shape in a cross section orthogonal to the opening edge as shown in FIG. 2 as a whole. The L-shaped bracket 10 includes a plate-like first joint portion 10a that joins the vehicle interior side surface plate 9 and the vehicle exterior side surface plate 8 of the side structure 2 on the end surface on the doorway 6 side of the side structure 2, and the first joint portion 10a. It consists of a plate-like second joint portion 10b which is integrally continuous and is formed to protrude toward the frame 7 on the vehicle outer side surface plate 8 side. The thickness of the 2nd junction part 10b is formed more thickly than the thickness of the vehicle outer side surface board 8. FIG.

  The first joint portion 10a is butt welded to the vehicle outer side plate 8 and the vehicle inner side plate 9 as welded portions 11 and 12, respectively. The second joint portion 10 b is butt joined to the frame 7 as shown as a welded portion 13. Since the vehicle outer side plate 8 and the vehicle inner side plate 9 are connected by the first joint portion 10a, the distance between the vehicle outer side plate 8 and the vehicle inner side plate 9 does not change at the edge of the side structure 2 and is constrained to each other. Therefore, deformation in the out-of-plane direction of the vehicle outer side surface plate 8 and the vehicle inner side surface plate 9 can be suppressed against a static or dynamic load in the vertical direction acting around the opening of the doorway 6. The thick second plate joint 10b firmly joins the entrance / exit frame 7 and the vehicle outer side face plate 8 by welding, so that the necessary strength can be secured around the entrance / exit.

  The first joint portion 10 a of the L-shaped metal fitting 10 is arranged in the vertical direction along the vertical opening edge of the entrance / exit 6. The 1st junction part 10a may be continuously arrange | positioned also in the horizontal direction along the up-and-down opening edge of the entrance / exit 6.

  On the other hand, the frame 7 and the vehicle interior side surface plate 9 of the side structure 2 are arranged in such a manner that the extension portion 7e of the frame 7 overlaps the vehicle interior side surface plate 9 on the vehicle interior side. Joined by meat bonding.

  The plate thickness of the second joint 10b of the L-shaped bracket 10 (referred to as the vertical dimension in FIG. 2), that is, the joint depth of the butt joint by the welded portion 13, is the plate thickness of the vehicle outer side face plate 8 of the side structure 2. (In FIG. 2, the vertical dimension is referred to.) Such a plate thickness relationship can suppress local bending deformation occurring in the face plate. As a result, it is possible to ensure the necessary strength against the static or dynamic load in the vertical direction without increasing the thickness of the vehicle outer side face plate 8 of the side structure 2, that is, without increasing the weight of the structure. it can.

  The outer surfaces of the L-shaped metal fitting 10 and the welded portions 11 and 13 of the butt joint are in the same plane as the outer surface of the vehicle outer side face plate 8 of the side structure 2 and the outer surface of the frame 7. Specifically, by machining the outer surfaces of the welded portions 11 and 13 of the butt joint, the outer surfaces of the vehicle outer side face plate 8, the frame 7 and the L-shaped bracket 10 of the side structure 2 are flush, that is, the same surface. Is in.

  In such a configuration, it is not necessary to extend the vehicle outer side face plate 8 of the side structure 2 to the frame 7 side, and the vehicle outer side face plate 8 and the vehicle inner side face plate 9 are connected by the first joint portion 10a at the edge of the side structure 2. The deformation of the vehicle outer side surface plate 8 and the vehicle inner side surface plate 9 in the out-of-plane direction can be suppressed with respect to the vertical load acting around the opening of the doorway 6. In addition, the thick second joining portion 10b firmly connects the entrance / exit frame 7 and the vehicle outer side face plate 8 by welding, so that necessary strength can be secured around the entrance / exit. Accordingly, it is necessary for a static load in the vertical direction or a dynamic load due to vibration or the like without increasing the plate thickness of the vehicle outer side face plate 8 of the side structure 2, that is, without increasing the structure mass. Strength can be secured.

  Moreover, since the outer surfaces of the vehicle outer side face plate 8, the frame 7, the L-shaped bracket 10 and the welded portions 11 and 13 of the butt joint are on the same plane, the outer surface of the side structure 2 is not uneven. Can provide excellent design properties. Furthermore, this can prevent the occurrence of noise outside the vehicle due to the unevenness of the outer surface of the side structure 2.

  The frame 7 is formed by an extruded shape (a shape extruded in the vertical direction in FIG. 2) or by cutting. In FIG. 1, the corners of the vertical portions 7a and 7b and the horizontal portion 7c of the frame 7 are formed. It can be integrally formed by welding. This weld line is oblique to the corner. Or the corner | angular part of the vertical parts 7a and 7b and the horizontal part 7c arrange | positions the cutting components in the shape of the 3rd corner | angular part, and it couple | bonds with the vertical parts 7a and 7b and the horizontal part 7c by welding.

  In FIG. 1, the horizontal portion 7 d of the frame 7 is also shown at the lower end of the entrance / exit 6, but if the lower end of the frame is welded to the side beam of the underframe 3, the lower end horizontal portion of the frame 7 is It can be made unnecessary.

  A second embodiment of the present invention will be described with reference to FIG.

  In the second embodiment, the L-shaped bracket 10 of the embodiment of FIG. 2 is configured by a first joint portion 10A and a second joint portion 10B as two members which are separate bodies. In the embodiment of FIG. 4, the first joint 10A and the second joint 10B are plate-shaped, and it is necessary to configure the L-shaped bracket 10 with a machined product or an extruded shape product as shown in FIG. Therefore, the material cost can be reduced and the processing cost can be reduced. The first joint portion 10A and the second joint portion 10B are butt welded as shown by the welded portion 15, and are connected to the L shape at a cross section orthogonal to the opening edge as shown. The plate 10B is welded to the plate 10A, but may be welded to the face plate 8.

  A third embodiment of the present invention will be described with reference to FIG.

  In the third embodiment, the second joint portion 10B in the second embodiment is configured integrally with the frame 7. That is, the second joint portion is provided as a protruding portion 7B that protrudes from the frame 7 toward the side structure 2 side. 10A of 1st junction parts and the 2nd junction part 7B are welded by the welding part 15, and are connected by the L type seeing in the cross section orthogonal to an opening edge. According to the third embodiment, compared to the first embodiment shown in FIG. 2, the L-shaped bracket can be easily configured, and the joining work of the second joint portion 7B can be reduced.

  In each of the above-described embodiments, the joining of the plate members has been described by welding. However, instead of welding, friction stir welding can be performed. Moreover, joining means welding or friction stir welding.

The perspective view of the rail vehicle structure of one Example of this invention. II-II sectional drawing of FIG. The deformation | transformation figure with respect to the load of the up-down direction of a rail vehicle structure. FIG. 2 is a view corresponding to FIG. 2 of another embodiment of the present invention. FIG. 2 is a view corresponding to FIG. 2 of another embodiment of the present invention.

Explanation of symbols

1: Roof structure 2: Side structure 3: Underframe 4: Wife structure 6: Entrance / exit 7: Entrance / exit frame 7B: Protruding part 7a, 7b: Vertical part 7c, 7d: Horizontal part 7e: Extension part 8: Car exterior face plate 9: Car interior side plate 10: L-shaped brackets 10a, 10A: first joints 10b, 10B, 7B: second joints 11, 12, 13, 14, 15: welded parts 16: ribs 17: pillow beams 20: rail vehicle structure

Claims (5)

It is composed of a hollow member composed of a vehicle outer side plate, a vehicle inner side plate, and a plurality of ribs connecting the both side plates, and includes a side structure formed with an entrance opening, and along the opening edge of the entrance In the vehicle structure formed by fixing an entrance / exit frame to the vehicle outer side plate and the vehicle inner side plate of the hollow shape member,
The vehicle outer side plate and the vehicle inner side plate are welded by a joining member along the opening edge,
The joint member includes a first joint that joins the vehicle outer side plate and the vehicle inner side plate, and a second joint that joins a portion of the first joint from the vehicle outer plate and the vehicle outer side of the entrance / exit frame. A part,
A vehicle structure characterized by. The vehicle structure according to claim 1, wherein
The first joint portion and the second joint portion of the joining member are integrally formed and have an L-shape as a whole in a cross section orthogonal to the opening edge;
A vehicle structure characterized by. The vehicle structure according to claim 1, wherein
The first joint portion and the second joint portion of the joining member are configured separately from each other and connected to an L shape by welding in a cross section orthogonal to the opening edge;
A vehicle structure characterized by. The vehicle structure according to claim 1, wherein
The first joint portion and the second joint portion of the joining member are configured separately from each other, and the second joint portion is integrated with the entrance / exit frame protruding from the entrance / exit frame toward the side structure. It is a member of
The first joint portion and the second joint portion are connected to the L shape by welding in a cross section orthogonal to the opening edge;
A vehicle structure characterized by. The vehicle structure according to claim 1, wherein
The thickness of the second joint portion is thicker than the thickness of the vehicle outer face plate,
A vehicle structure characterized by.

Images