JP3720789B2 - Railcar structures - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a railway vehicle structure, and is particularly suitable for a high-speed railway vehicle structure having airtightness.
[0002]
[Prior art]
Conventionally, a structure for a railway vehicle that is loaded with a high airtight load (for example, a structure such as a Shinkansen that passes through a tunnel at a high speed or a magnetic levitation type railway vehicle) is composed of an outer plate and a structure frame, and the upper portion is almost the same. It is formed in a cylindrical shape. As a result, the structure is largely deformed by the action of the airtight load, so that a high bending stress is not generated.
[0003]
However, if the upper part is cylindrical in this way, the cabin space will be smaller, and the door engine will be difficult to install, so the shape of the upper part of the structure will be changed from the cylindrical shape to the structure of ordinary vehicles. The box structure (the left and right side structures extend in a substantially vertical direction, while the roof structure extends in the horizontal direction, and the left and right connection parts have round corners (corners)). There is a request.
[0004]
[Problems to be solved by the invention]
However, if the basic shape of the structure is changed from a cylindrical shape to a box shape, the cylindrical shape remains cylindrical even if an airtight load is applied, but if it is a box shape, When a load is applied, a high stress is applied to the corner portion, which is a connecting portion between the roof structure and the side structure, in an attempt to form a cylindrical shape.
[0005]
That is, as shown in FIG. 7, the structure 201 is composed of an outer plate 201a and a structure frame 201b. When a high airtight load acts on the structure 201 as an internal pressure load, the outer plate 201a has a cylindrical shape. Try to be. Then, the structure frame 201b is bent so as to be spread outward at a corner portion that is a connection portion between the roof structure S1 and the side structure S2, as indicated by a two-dot chain line in FIG. Therefore, a high bending stress is generated in the inner part (see hatching in FIG. 7) of the structure frame 201b.
[0006]
As described above, in a box-shaped railway vehicle structure to which a high airtight load is applied, a high bending stress is applied to the structure frame by the action of the airtight load in the vicinity of the connection portion (corner curved portion) between the side structure and the roof structure. appear.
[0007]
By the way, as described in, for example, Japanese Patent Laid-Open No. Hei 8-1088849, in a two-story railway vehicle body, the roof structure and the side structure are lightened for the purpose of reducing the weight and improving the strength and rigidity. What was comprised so that it might connect by the extrusion type | mold material (hollow shape material) made from an alloy is known.
[0008]
Therefore, the inventor does not connect the roof structure and the side structure with a highly rigid hollow shape as in the technique described in Japanese Patent Laid-Open No. 8-108849, but instead has a low rigidity hollow shape. If a structure that can relieve the high bending stress generated in the structure frame is used as the hollow shape member, the above-mentioned "connection portion between the side structure and the roof structure (corner curved portion)" The inventors have conceived that the problem that high bending stress is generated in the structure frame due to an airtight load in the vicinity can be solved, and the present invention has been made.
[0009]
Incidentally, for example, Japanese Patent No. 2669535 (JP-A-1-309870) also describes a structure in which a side structure composed of an outer plate and a structure frame and a roof structure are connected by a hollow shape member. The technology secures sufficient strength and rigidity by constructing the part with the highest stress against the bending deformation acting between the side structure and the roof structure by the extruded shape. The structure is not designed to reduce the bending stress by reducing the rigidity.
[0010]
An object of the present invention is to provide a railway vehicle structure that suppresses the generation of high stress at the connecting portion by connecting the side structure and the roof structure via a hollow member having low rigidity. .
[0011]
[Means for Solving the Problems]
According to the first aspect of the present invention, a side structure and a roof structure are constituted by the outer plate and the structure frame, and the outer plates of the side structure and the roof structure are connected by a hollow shape member extending in the longitudinal direction of the vehicle. In the structure for a railway vehicle, the hollow shape member includes an outer plate portion and an inner plate portion, and a cross-section truss-like connecting portion that couples both the plate portions, and the connecting portion includes the inner plate portion. A pair of connecting plate portions for connecting the upper and lower edge portions to a substantially intermediate portion in the circumferential direction of the outer plate portion, and when the internal pressure is applied, the outer plate portion serves as a boundary between the connecting plate portions. As described above, the both side portions are bent and deformed in the thickness direction so as to bulge outward, while the inner plate portion is bent and deformed in the thickness direction so as to bulge outward when an external pressure is applied. It is characterized by.
[0012]
In this way, the hollow shape material provided between the side structure and the roof structure constituting the box-shaped structure is a structure that reduces the rigidity of the connection portion between the side structure and the roof structure. The rigidity of the connecting portion between the structure and the roof structure is reduced. That is, by using such a hollow shape member for the connection portion, the side structure and the roof structure are compared with the conventional case in which the side structure and the roof structure are configured by the outer plate and the structure frame including the connection portion. The rigidity of the connecting portion is reduced.
In particular, the hollow shape member includes an outer plate portion and an inner plate portion that can be bent and deformed in the thickness direction, and a cross-section truss-like connection portion that couples both the plate portions. By appropriately changing or adjusting the shape of the portion or the like, it is possible to easily obtain a structure that reduces the rigidity of the connection portion between the side structure and the roof structure. Then, bending deformation (bending deformation) is performed at the outer plate portion and the inner plate portion of the hollow shape member extending in the longitudinal direction of the vehicle, and the generated stress is dispersed in the longitudinal direction, thereby avoiding the generation of high bending stress. .
When internal pressure is applied, a bending moment is applied to the hollow profile. At this time, the thickness of the outer plate is increased so that both sides of the outer plate bulge outward from the portion where the connecting plate is connected. Therefore, the generated stress acting on the portion is absorbed and relaxed and dispersed in the longitudinal direction of the hollow shape member. On the other hand, when an external pressure is applied, a bending moment acts on the hollow shape member in the direction opposite to that when the internal pressure is applied. At this time, the inner plate portion is bent and deformed in the thickness direction so as to bulge outwardly. Furthermore, the generated stress acting on the portion is relaxed and dispersed in the longitudinal direction of the hollow shape member.
In this way, by providing a hollow shape at the connection portion between the side structure and the roof structure, compared to the conventional structure in which the side structure and the roof structure are configured by the outer plate and the structure frame including the connection portion, The connecting portion becomes soft and the rigidity is reduced, and the stress generated in the connecting portion is relieved in combination with the stress being dispersed in the longitudinal direction of the hollow shape member.
Here, “reducing the rigidity of the connecting portion” is adjusted by appropriately changing the thickness of the outer plate, the curvature of the hollow shape, the internal structure, etc., and the hollow shape is bent and deformed to apply stress. Rigidity is enough to relax.
[0013]
Thereby, since the connection part of a side structure and a roof structure becomes soft, the stress which generate | occur | produces in the part is relieve | moderated. Since the hollow member extends in the longitudinal direction of the vehicle (the longitudinal direction of the vehicle body), the acting stress is dispersed in the longitudinal direction of the vehicle, and there is no possibility of increasing the weight.
[0018]
According to a second aspect of the present invention, the structure frame includes an outer flange portion on the outer plate side and an inner flange portion on the opposite outer plate side, and the inner flange portion and the inner plate portion of the hollow shape member are connected to each other. It is desirable to be connected by a reinforcing plate member.
[0019]
In this way, since the inner flange portion and the inner plate portion of the hollow shape member are connected by the reinforcing plate member, the inner plate portion and the outer plate portion of the hollow shape member are loaded at the time of internal pressure load or external pressure load. Is moderately bent and deformed to disperse the stress in the longitudinal direction of the vehicle. Thereby, the bending stress which acts on the connection part of a roof structure and a side structure is relieved.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0021]
1 is a longitudinal sectional view showing an embodiment of a railway vehicle structure according to the present invention, FIG. 2 is an enlarged view of a portion X in FIG. 1, and FIG. 3 is a view in the direction of arrow Y in FIG.
[0022]
As shown in FIG. 1, a railway vehicle structure 1 according to the present invention has a box-like shape by a roof structure 11 extending in a substantially horizontal direction, left and right side structures 12 and 13 extending in a substantially vertical direction, and a bottom structure 14. It is comprised and it has airtightness.
[0023]
Each of the structures 11, 12, 13, and 14 includes a roof, outer plates 11A, 12A, 13A, and 14A for left and right side surfaces and a bottom surface, and structure frames 11B, 12B, 13B, and 14B attached to the inner side surfaces thereof. Is done. The structure frames 11B, 12B, 13B, and 14B are provided on the inner peripheral side of the outer plates 11A, 12A, 13Aa, and 14A in order to maintain the overall outer shape and rigidity. In addition, such outer plates 11A, 12A, 13A, and 14A are formed wide by joining a plurality of extruded mold members made of an aluminum material obtained by integrally molding a plurality of stringers to each other in the longitudinal direction side edges. It is what is done.
[0024]
On the inner surface of the outer plate 13A of the side structure 13, structure frames 13B are provided at regular intervals in the vehicle longitudinal direction. The structure frame 13B includes an outer flange portion 13Ba connected to the outer plate 13A, and one side edge connected to one side edge of the outer flange portion 13Ba inward (in a direction perpendicular to the outer flange portion 13Ba). And an inner flange portion 13Bc having one side edge connected to the other edge of the web portion 13Bb and extending parallel to the opposite direction to the outer flange portion 13Ba. The left side structure 12 is configured in the same manner as the right side structure 13.
[0025]
In addition, loads of passengers, seats, in-car facilities, etc. on the floor board in the cabin are supported by the floor beam 15 via the floor board. The floor beam 15 that supports the load is connected to the structure frames 12B and 13B via brackets 16 and 17 at the left and right ends, and via a pair of stays 18 and 19 that extend in the vertical direction near the center. Since it is connected to the structure frame 14B, the load supported by the floor beam 15 (floor plate) is applied to the structure frames 12B, 13B, and 14B via the brackets 16 and 17 at the left and right ends and the pair of stays 18 and 19. Communicated.
[0026]
As shown in detail in FIGS. 2 and 3, the connecting portion between the roof structure 11 and the left and right side structures 12, 13 has left and right hollow shapes whose outer plates 11 A, 12 A, 13 A extend in the vehicle longitudinal direction. It is configured to be connected by materials 21 and 22. Since the left hollow member 21 has the same configuration as the right hollow member 22, the right hollow member 22 will be described.
[0027]
The hollow shape member 22 has a cross-sectional truss shape in which the outer plate portion 22A, the inner plate portion 22B, and the two plate portions 22A and 22B, which can be bent and deformed in the thickness direction, are basically combined in the cross-sectional shape. The connecting portion 22C is configured to have the same cross-sectional shape in the longitudinal direction. Here, the curvature of the hollow shape member 22 (the outer plate portion 22A and the inner plate portion 22B), the plate thickness of the outer plate portion 22A and the inner plate portion 22B, and the pitch of the connecting portion between the connecting portion 22C and the outer plate portion 22A. The rigidity is adjusted by such means. In this example, in particular, the pair of truss-shaped reinforcing portions 22C provided inside the hollow shape member 22 is paired to avoid an increase in rigidity as in the conventional structure (Japanese Patent No. 2669535). Further, as shown in detail in FIG. 4, it has side plate portions 22D and 22E that connect both side edges of the outer plate portion 22A and the inner plate portion 22B, and the roof structure 11 and the side from the side plate portions 22D and 22E. Flange portions 22F and 22G to be joined to the inner surface side of the outer plate 13A of the structure 13 are integrally provided.
[0028]
A cutout portion 13Bd is formed in the outer flange portion 13Ba and the web portion 13Bb of the structure frame 13 so as not to hinder the joining of the outer plate portion 13B and the flange portion 22G.
[0029]
The connecting portion 22C has a pair of connecting plate portions 22Ca and 22Cb for connecting the upper and lower edge portions of the inner plate portion 22B to a substantially intermediate portion in the circumferential direction of the outer plate portion 22A.
[0030]
By using the connecting portion 22C (the connecting plate portions 22Ca and 22Cb) having such a configuration, when an airtight load is applied, the outer plate portion 22A and the inner plate portion 22B are bent and deformed in the thickness direction. It is designed to relieve stress.
[0031]
That is, by providing such a soft hollow shape member 22, the rigidity of the connection portion between the side structure 13 and the roof structure 11 is reduced. Further, the inner flange portion 13Bc and the inner plate portion 22B of the hollow shape member 22 are connected by a triangular reinforcing plate member 25 to ensure connection strength, and the aforementioned outer plate portion 22A and inner plate portion 22B. The bending deformation of the is made to occur without difficulty.
[0032]
Similarly, also in the roof structure 11, the structure frame 11B provided inside the outer plate 11A has an outer flange portion 11Ba connected to the outer plate 11A and one side edge connected to one side edge of the outer flange portion 11Ba. And a web portion 11Bb extending inwardly (in a direction orthogonal to the outer flange portion 11Ba), and an inner side (one side edge connected to the other side edge of the web portion 11Bb and extending parallel to the opposite direction to the outer flange portion 13a) And the non-outer plate side) flange portion 11Bc. The inner flange portion 11Bc and the inner plate portion 22B of the hollow shape member 22 are connected by a reinforcing plate member 26 having a triangular plate shape, and connection strength is ensured.
[0033]
The structure frames 11 and 13 have notches 11Bd and 13Bd so that the flange portions 22F and 22G of the hollow shape member 22 and the outer plates 11A and 13A of the roof structure 11 and the side structure 13 can be connected without difficulty. Is formed.
[0034]
FIG. 5 is an explanatory view showing a deformation state of the hollow shape member 22 when an airtight load is applied to the railway vehicle structure 1 according to the present invention.
(Internal pressure load)
As shown in FIGS. 5 (a) and 5 (b), when an internal pressure load acts, a bending moment acts on the hollow shape member 22 (21) in the S1 and S2 directions. At this time, the outer plate portion 22A Since the portions where both the connecting plate portions 22Ca and 22Cb are connected are bent and deformed in the thickness direction so that the portions on both sides swell outward, the generated stress acting on the portions is absorbed and relaxed, and Dispersed in the longitudinal direction of the profile 22.
(External pressure load)
As shown in FIGS. 5 (a) and 5 (c), when an external pressure load is applied, a bending moment is applied to the hollow shape member 22 (21) in the direction opposite to that during the internal pressure load, that is, in the S3 and S4 directions. At this time, the inner plate portion 22B is bent and deformed in the thickness direction so as to swell outward, and similarly, the generated stress acting on the portion is relaxed and dispersed in the longitudinal direction of the hollow shape member 22.
[0035]
Thus, by providing the hollow shape member 22 at the connection portion between the side structure 13 and the roof structure 11, a conventional structure in which the side structure and the roof structure are configured by the outer plate and the structure frame including the connection portion. In comparison, the connecting portion becomes soft and the rigidity is reduced, and the stress generated in the connecting portion is relieved in combination with the stress being dispersed in the longitudinal direction of the hollow shape member 22 (21).
[0036]
In addition, unlike the prior art, the structure is not a structure that copes with the deformation of the hollow shape by increasing the rigidity, so there is no risk of increasing the weight.
[0037]
In addition, if it is set as the structure which provides the flat connection part 102 in the hollow shape member 101 like the conventional structure (patent 2669565), as shown to Fig.8 (a) (b), S5 and S6 direction Although the bending moment acts on the diamond and the rhomboid deformation as shown in FIG. 8B cannot be suppressed, the connecting portion 22C has a truss shape. Stress is relieved by reducing the rigidity in the rotational direction of the shaft.
[0038]
In addition to the above, the railway vehicle structure according to the present invention can be configured as follows.
(1) When bending deformation occurs in the outer plate portion or the inner plate portion of the hollow shape member 22, it bends more toward the center portion, and the generated stress increases in that portion. To avoid this, for example, FIG. As shown in (a), the plate element 31 (the bent portion of the outer plate portion and the inner plate portion) constituting the hollow shape member 22 ′ is gradually bent toward the center portion so that the plate thickness is gradually reduced. It is also possible to relieve stress in the vicinity of the joint portion between the outer plate portion 22A and the inner plate portion 22B, the connecting portion 22C, and the side plate portions 22D and 22E. For the same purpose, as shown in FIG. 6B, the plate element 32 constituting the hollow shape member 22 ″ can be formed in a stepped shape so that the plate thickness gradually decreases toward the center. It is.
(2) The above-described embodiment is particularly suitable for a Shinkansen or magnetic levitation type railway vehicle structure which is an airtight structure, but the present invention is not limited thereto, and can also be applied to a general railway vehicle.
[0039]
【The invention's effect】
The present invention is implemented as described above, and has the following effects.
[0040]
In the first aspect of the invention, the hollow shape member has an outer plate portion and an inner plate portion, and a cross-section truss-like connecting portion that couples both plate portions. By appropriately changing the shape, it is possible to easily obtain a structure that freely adjusts the rigidity of the connecting portion between the side structure and the roof structure. Further, since the connecting portion has a pair of connecting plate portions that connect the upper and lower edge portions of the inner plate portion to a substantially intermediate portion in the circumferential direction of the outer plate portion, in the outer plate portion of the hollow shape member, The inner plate portion is bent so as to protrude outward at the time of internal pressure load, while the inner plate portion is bent so as to protrude outward at the time of external pressure load. The bending stress acting on the corner portion) can be relaxed.
As described above, since the hollow shape member is provided between the side structure and the roof structure constituting the box-shaped structure to reduce the rigidity in the rotational direction around the longitudinal direction of the vehicle body. The rigidity of the connection portion between the side structure and the roof structure can be reduced as compared with the conventional structure in which the side structure and the roof structure are configured by the outer plate and the structure frame. Thereby, the connection part of a side structure and a roof structure can be softened, and the stress which generate | occur | produces in the part can be relieve | moderated.
[0043]
If the inner flange portion and the inner plate portion of the hollow shape member are connected by the reinforcing plate member as described in claim 2 , the inner plate portion and the outer plate portion of the hollow shape material at the time of internal pressure load or external pressure load. Can be moderately bent and deformed, and the bending stress acting on the connecting portion (corner portion) can be relaxed.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing an embodiment of a railway vehicle structure according to the present invention.
FIG. 2 is an enlarged view of a portion X in FIG.
FIG. 3 is a view in the Y direction of FIG.
FIG. 4 is a perspective view showing a relationship between a roof structure and a side structure of the railway vehicle structure and a hollow shape member.
FIGS. 5A, 5B, and 5C are explanatory views of the movement of the hollow shape member when an airtight load is applied, respectively.
FIGS. 6A and 6B are explanatory views of examples in which the plate thicknesses of the outer plate portion and the inner plate portion are changed, respectively.
FIG. 7 is an explanatory diagram of the operation of a conventional structure.
FIGS. 8A and 8B are explanatory diagrams of the operation of the conventional structure, respectively.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Railcar structure 11 Roof structure 11A Outer plate 11B Structure frame 11Ba Outer flange part 11Bb Web part 11Bc Inner flange part 12, 13 Side structure 12A, 13A Outer plate 12B, 13B Assembly frame 12Ba Outer flange part 12Bb Web part 12Bc Inner flange Portions 21 and 22 Hollow shape member 22A Outer plate portion 22B Inner plate portion 22C Connection portions 22Ca and 22Cb Connection plate portions 25 and 26 Reinforcing plate members

Claims (2)

A side structure and a roof structure are constituted by the outer plate and the structure frame, and the outer plate of the side structure and the roof structure is connected by a hollow shape member extending in the longitudinal direction of the vehicle to form a box shape. In
The hollow shape member includes an outer plate portion and an inner plate portion that can be bent and deformed in a thickness direction, and a connecting portion having a truss-shaped cross section that connects both the plate portions, and the connecting portion includes the inner plate. A pair of connecting plate portions for connecting upper and lower edges of the portion to a substantially intermediate portion in the circumferential direction of the outer plate portion,
When the internal pressure is applied, the outer plate is bent and deformed in the thickness direction so that both side portions bulge outward from the portion where the connecting plate is connected. However, the structure for a railway vehicle is characterized in that it is bent and deformed in the thickness direction so as to bulge outward . The structure frame has an outer flange portion on the outer plate side and an inner flange portion on the opposite outer plate side,
The railway vehicle structure according to claim 1, wherein the inner flange portion and the inner plate portion of the hollow shape member are connected by a reinforcing plate member.

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