JP2018176796A - Railway vehicle body structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-weight body structure of a railway vehicle which, without reinforcement frames, withstands a pressure load caused by pressure difference between inner and outer atmospheres, while the body structure partially has double skin harmonica-shaped structures.SOLUTION: Double skin structures of a side body structure and a roof body structure, when seen in the vehicle longitudinal direction, comprise a harmonica-shaped structure part whose enclosed space with two neighbouring connecting plate parts, an inner wall part and an outer wall part has a cuboid shape and a truss-shaped structure part neighbouring to the harmonica-shaped structure part whose enclosed space with two connecting plate parts, an inner wall part and an outer wall part has a triangular prism shape. The harmonica-shaped structure parts are arranged in at least several positions among the center of vehicle width direction of the roof structure, the pole plates at the center of peripheral edges of the vehicle body, the pier part of side body structure and the lower part of side beams which is lower than the floor plate.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a railway vehicle structure used for high-speed railway vehicles and the like.

  Among railway vehicle assemblies, those having a double skin structure composed of a plurality of hollow profiles are known. In the hollow member, the inner plate portion disposed on the inner side of the vehicle body, the outer plate portion disposed on the outer side of the vehicle body, and the inner plate portion and the outer plate portion are disposed with the plate surfaces separated And a connecting plate portion to be connected. At the time of manufacture of the railway vehicle assembly, the inner plate portions of the plurality of hollow members are coupled together, and the outer plate portions are coupled together.

  For example, as disclosed in Patent Document 1, in the double skin structure, a closed space formed by two adjacent connection plate portions and an inner plate portion or an outer plate portion viewed from the longitudinal direction of the vehicle is a triangle. There is a truss type or a harmonica type in which a closed space formed by the two connection plate portions, the inner plate portion and the outer plate portion is rectangular when viewed from the longitudinal direction of the vehicle.

Patent No. 3779283 gazette

  Although a railcar assembly having a truss-type double skin structure is widely used, the weight of the railcar assembly may increase. On the other hand, the double-skin structure of the harmonica type has a total length of the connecting plate portion connecting the inner plate portion and the outer plate portion of the hollow member compared to the truss-type double skin structure having the same bending strength. Although it is easy to reduce the weight of the railway vehicle structure, the shear strength is low.

  Here, in a high-speed railway vehicle etc., even if the external pressure fluctuates when passing through a tunnel etc., it is required that the cabin where the passengers and crew are located has an airtight structure to maintain the internal pressure almost constant. Required For example, when a railway vehicle structure such as a high-speed railway vehicle is configured with a harmonica type double skin structure, the vehicle body of the railway vehicle structure against pressure load acting on the railway vehicle structure due to a pressure difference between the inside and outside of the vehicle In order to compensate for the lack of strength against the shear force acting in the direction perpendicular to the circumferential direction of the frame, a reinforcing frame is additionally required. This complicates the structure of the railway car body and lowers the productivity.

  Therefore, the present invention provides a lightweight railway vehicle structure that can withstand pressure loads acting due to the pressure difference between the inside and outside of the vehicle without using a reinforcing frame while partially having a harmonica type double skin structure. The purpose is

  In order to solve the above problems, a railway vehicle structure according to an aspect of the present invention includes an underframe having side beams disposed on both sides in the vehicle width direction, and a side structure disposed on both sides in the vehicle width direction of the underframe. And a roof structure disposed above the side structure, the side structure, the roof structure, and the side beams being disposed on an inner wall portion disposed inside the vehicle of the vehicle body, and on the vehicle outside of the vehicle body And a plurality of connecting plate portions arranged in the circumferential direction of the vehicle body, connecting the inner wall portion and the outer wall portion with the wall surfaces separated, and viewed from the longitudinal direction of the vehicle The double skin structure is formed by two adjacent connection plates of the plurality of connection plates, the inner wall, and the outer wall when viewed from the longitudinal direction of the vehicle. When viewed from the longitudinal direction of the vehicle, a harmonica-type structure whose closed space is rectangular, And a truss-type structure adjacent to the moniker-type structure, wherein a closed space formed by the two connection plates and the inner wall or the outer wall is a triangle, the harmonica-type structure comprising At least one of a central portion in the vehicle width direction of the roof structure, a central portion in the circumferential direction of the vehicle body of the eaves girder, a blow-in portion of the side structure, and a lower portion of the side beam located below the floor plate It is placed in the

  Here, the eaves beam part is a part where the roof structure and the side structure are connected, and indicates a portion where the radius of curvature is smaller than that of the roof structure and the side structure. The eaves-girder part is, for example, a part whose radius of curvature is less than one tenth of the radius of curvature of the roof structure and the side structure.

  According to the above configuration, the harmonica type structure portion includes the central portion in the vehicle width direction of the roof structure, the central portion in the circumferential direction of the car body of the eaves girder, the blow-in portion of the side structure, and side beams located below the floor plate. It is disposed at least one of the lower portions.

  According to the inventors' investigations, the absolute value of the bending moment generated due to the pressure difference between the inside and outside of the vehicle is maximum at the central portion in the vehicle width direction in the roof structure, and is maximum at the central portion in the circumferential direction of the vehicle body at the eaves In the structure, it turned out to be the largest at the blowing part. In addition, it was found that the position where the absolute value of the bending moment becomes the maximum value is substantially the same position when the air pressure difference inside and outside the vehicle is different or when the air pressure inside and outside the vehicle is high.

  Furthermore, in a region other than the joint portion of the railway vehicle structure where the side structure and the underframe are combined, the vertical direction is perpendicular to the circumferential direction of the vehicle body of the railway vehicle structure at a position where the absolute value of bending moment is maximum. It has been found that the shear force acting on is sufficiently low.

  In addition, the region below the floor plate in the side beam of the underframe of the rail vehicle structure is located outside the rail vehicle and is not affected by the pressure load exerted by the pressure difference inside and outside the vehicle. For this reason, the lower part of the side beam located below the floor board can be made into a harmonica type structure.

  The above configuration is made based on these findings, and is positioned below the central portion in the vehicle width direction of the roof structure, the circumferential central portion of the vehicle body of the eaves girder, the blow-in portion of the side structure, and the floor plate. By arranging the harmonica structure at at least one of the lower portions of the side beams, the railway vehicle structure is substantially constant even without using the reinforcing frame while having the harmonica structure. The pressure load of the pressure difference due to the fluctuation of the external pressure relative to the internal pressure of the vehicle can be tolerated.

  Further, a truss structure portion is disposed adjacent to the harmonica structure portion in a portion of the railway vehicle structure having the large shear force acting on the railway vehicle structure, and a portion of the railway vehicle structure having the small shear force acting on the railway vehicle structure. In addition, since the harmonica-type structure portion is disposed, the strength of the position adjacent to the harmonica-type structure portion of the railway vehicle assembly can be secured without using the reinforcing frame.

  According to the present invention, it is possible to provide a lightweight railway vehicle structure that can withstand pressure loads acting due to the pressure difference between the inside and outside of the vehicle without using a reinforcing frame while partially having a harmonica-type double skin structure. it can.

It is a perpendicular sectional view perpendicular to the longitudinal direction of vehicles of a rail car body structure concerning an embodiment. It is the side view which looked at the side of the rail car structure of FIG. 1 from the vehicle exterior. It is the simulation figure which showed the magnitude | size of the bending moment which generate | occur | produces to the barometric pressure difference of the vehicle interior and exterior to the rail vehicle structure of FIG. FIG. 4 is a simulation diagram showing the magnitude of shear force applied to the railway vehicle structure in the direction perpendicular to the circumferential direction of the vehicle body by the bending moment shown in FIG. 3.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a vertical cross-sectional view perpendicular to the longitudinal direction of a vehicle of a railway vehicle assembly 1 according to the embodiment. In FIG. 1, the vertical cross section of the area | region from the center part of the vehicle width direction of the rail vehicle body structure 1 to an end is shown. FIG. 2 is a side view of the side surface of the railway car structure 1 of FIG. 1 as viewed from outside the vehicle.

  A railway vehicle provided with the railway vehicle structure 1 of the present embodiment is a high-speed railway vehicle. In this high-speed rail vehicle, the external pressure fluctuates with respect to the internal pressure maintained substantially constant during traveling in a tunnel, passing of high-speed rail vehicles, etc. The load acts. The railway vehicle provided with the railway vehicle structure 1 may be other than the high-speed railway vehicle.

  As shown in FIGS. 1 and 2, the railway car structure 1 includes an underframe 2, a pair of side structures 3, and a roof structure 4. Although not shown in the drawings, the railway car structure 1 is provided with a pair of wife structures. Railroad vehicle assembly 1 has, as an example, a symmetrical structure with respect to vehicle body center line CL passing through the center in the vehicle width direction, as viewed in the vehicle longitudinal direction.

  The underframe 2 supports the pair of side structures 3. The underframe 2 has a pair of side beams 2 a and a plurality of cross beams 5. The pair of side beams 2 a is disposed on both sides in the vehicle width direction of the underframe 2. The pair of side beams 2a extend in the vehicle longitudinal direction. The plurality of cross beams 5 extend in the vehicle width direction, and are arranged at an interval in the vehicle longitudinal direction between the pair of side beams 2a. Both ends of the cross beam 5 in the vehicle width direction are connected to the pair of side beams 2a. A floor plate 8 is disposed above the cross beam 5.

  The pair of side structures 3 support the roof structure 4. The pair of side structures 3 are disposed on both sides in the vehicle width direction of the underframe 2. The plate surface of the side structure 3 extends in the vertical direction and in the longitudinal direction of the vehicle. The lower end of the side structure 3 is coupled to the upper portion of the side beam 2 a of the underframe 2.

  The side structure 3 is formed with a plurality of windows 3 a and a plurality of blows 3 b. The plurality of windows 3a are arranged in the side structure 3 at intervals in the longitudinal direction of the vehicle. The plurality of blowing parts 3 b are disposed between a pair of adjacent window parts 3 a of the side structure 3.

  The roof structure 4 constitutes a roof of a railway vehicle. The roof structure 4 is disposed above the side structure 3. The roof structure 4 is coupled to the side structure 3. One end (both ends in the present embodiment) of the roof structure 4 in the vehicle width direction is connected to the upper end of the side structure 3.

  The side structure 3, the roof structure 4 and the side beams 2 a have a plurality of hollow profiles 6. The plurality of hollow profiles 6 are disposed in the circumferential direction of the vehicle body as viewed from the longitudinal direction of the vehicle. Each of the plurality of hollow members 6 has an inner plate portion 6a, an outer plate portion 6b, and a connecting plate portion 6c. The inner plate portion 6a is disposed inside the vehicle body. The outer plate portion 6b is disposed outside the vehicle body. The connection plate portion 6c connects the inner plate portion 6a and the outer plate portion 6b in a state where the plate surfaces are separated.

  The plurality of hollow profiles 6 include hollow profiles 10-17. The hollow section 10 is disposed at a central portion 4 a of the roof structure 4 in the vehicle width direction. The hollow members 11 and 12 are disposed at the eaves of the railway vehicle assembly 1. The hollow profile 12 is disposed below the hollow profile 11.

  The hollow members 13 and 14 are disposed in the blow-up portion 3 b of the side assembly 3. The hollow profile 14 is disposed below the hollow profile 13. The hollow profiles 15 and 16 are arranged on the side beams 2 a of the underframe 2. The hollow profile 16 is disposed below the hollow profile 15. The hollow profile 17 is arranged in the upper structure adjacent to the hollow profile 15 of the side structure 3.

  In each of the side structure 3 and the roof structure 4, the plurality of inner plate portions 6a of the plurality of hollow members 6 are combined to form the inner wall portion 7a, and the plurality of outer plate portions 6b are combined to form the outer wall The portion 7b is formed. The plurality of hollow profiles 6 are joined by welding as one example, but is not limited thereto, and may be joined by, for example, a friction stir welding method.

  The side structure 3, the roof structure 4 and the side beams 2 a have a double skin structure 7. The double skin structure 7 includes an inner wall 7a, an outer wall 7b, and a connecting plate 6c. The connection plate portion 6c in the double skin structure 7 connects the inner wall portion 7a and the outer wall portion 7b in a state where the wall surfaces are separated. In the present embodiment, the double skin structure 7 is formed by the side structure 3, the roof structure 4 and the side beams 2 a being constituted by a plurality of hollow members 6.

  The double skin structure 7 has harmonica-type structure parts A1 to A4 and truss-type structure parts B1 to B3. The harmonica-type structure portion A1 is disposed at the central portion 4a of the roof structure 4. The harmonica type structure part A2 is arrange | positioned at the center part 1a of the eaves-beam. The harmonica type structure portion A3 is disposed in the blow-up portion 3b of the side structure 3. The harmonica-type structure portion A4 is disposed in the lower portion 2b located below the floor plate 8 of the side beam 2a.

  In the harmonica-type structure portions A1 to A4, a closed space formed by two adjacent connection plate portions 6c of the plurality of connection plate portions 6c, the inner wall portion 7a and the outer wall portion 7b when viewed from the vehicle longitudinal direction is It is rectangular.

  In the railway vehicle structure 1, the harmonica type structure portion includes the central portion 4a in the vehicle width direction of the roof structure 4, the blow-in portion 3b of the side structure 3, and the central portion 1a in the circumferential direction of the car body of the eaves girder viewed from the longitudinal direction of the vehicle And it should just be arrange | positioned in the position of at least one of the lower side parts 2b of the side beam 2a located below rather than the floor board 8. As shown in FIG.

  In the truss-type structure portions B1 to B3, a closed space formed by two adjacent connection plate portions 6c of the plurality of connection plate portions 6c and the inner wall portion 7a or the outer wall portion 7b when viewed from the longitudinal direction of the vehicle It is a triangle. Truss-type structure parts B1-B3 are arrange | positioned adjacent to harmonica-type structure parts A1-A4.

  In rail car structure 1, as an example, at least a plurality of hollow members 6 of side structure 3, roof structure 4 and side beam 2a are connected to at least inner wall 7a and outer wall 7b of harmonica structure portions A1 to A4. Hollow members 6 (all hollow members 6 in this embodiment) forming the plate portion 6c are extrusion molded members. Note that any of the plurality of hollow members 6 may be manufactured, for example, by welding the inner plate portion 6a, the outer plate portion 6b, and the connecting plate portion 6c.

  The harmonica type structure part A1 is comprised by the hollow profile 10, the hollow profile 10, and the two hollow profiles 6 adjacent to a vehicle width direction as an example. When viewed from the longitudinal direction of the vehicle, in the hollow member 10, the connecting plate portion 6c is vertically connected to the plate surfaces of the inner plate portion 6a and the outer plate portion 6b.

  The harmonica type structure part A2 is comprised by a pair of hollow members 11 and 12 as an example. The pair of hollow members 11 and 12 are disposed side by side in the circumferential direction of the vehicle body as viewed from the longitudinal direction of the vehicle. When viewed from the longitudinal direction of the vehicle, the connecting plate portion 6c is vertically connected to the plate surfaces of the inner plate portion 6a and the outer plate portion 6b in the portion where the pair of hollow members 11 and 12 are connected to each other.

  The harmonica type structure part A3 is comprised as an example by a pair of hollow profiles 13 and 14 and the two hollow profiles 6 adjacent to a pair of hollow profiles 13 and 14, respectively. The pair of hollow members 13 and 14 are arranged side by side in the circumferential direction of the vehicle body as viewed from the longitudinal direction of the vehicle. The hollow profile 13 is located above the hollow profile 14. When viewed from the longitudinal direction of the vehicle, in the pair of hollow members 13 and 14, the connection plate portion 6c is vertically connected to the plate surfaces of the inner plate portion 6a and the outer plate portion 6b.

  The harmonica type structure part A4 is comprised by a pair of hollow members 15 and 16 as an example. The harmonica structure portion A4 constitutes the lower portion 2b of the side beam 2a. The pair of hollow members 15 and 16 are arranged side by side in the circumferential direction of the vehicle body. The hollow profile 15 is located above the hollow profile 16. The upper part of the hollow profile 15 has a truss-type structure, and the lower part has a harmonica-type structure. As viewed from the longitudinal direction of the vehicle, in the lower portion of the hollow section 15 and the hollow section 16, the connecting plate 6c is vertically connected to the plate surface of the inner plate 6a.

  At least one of a harmonica-type structure portion of at least one of the central portion 4a in the vehicle width direction of the roof structure 4, the blow-in portion 3b of the side structure 3, and the lower portion 2b of the side beam 2a located below the floor plate 8 Here, the harmonica type structural portions A1, A3 and A4) have three or more connecting plate portions 6c arranged continuously in the circumferential direction of the vehicle body as viewed from the longitudinal direction of the vehicle.

  In the harmonica type structural parts A1 to A4, the number of connecting plate parts 6c is reduced as compared with the truss type structural parts of the same bending strength, and the thickness dimension of the inner sheet part 6a and the outer sheet part 6b The length dimension of the connection plate portion 6c seen can be reduced. Thus, the weight of the railway car structure 1 can be easily reduced.

  The harmonica type structure part A1 in the center part 4a of the roof structure 4 of FIG. 1 is from the connecting plate part 6c closest to the hollow profile 10 of the hollow profile 6 adjacent to one side of the hollow profile 10 in the vehicle width direction. This corresponds to the area of the double skin structure 7 up to the connecting plate portion 6c closest to the hollow profile 10 of the hollow profile 6 adjacent to the other side of the hollow profile 10 in the vehicle width direction. The harmonica structure portion A1 has a plurality of (here, six in total) connecting plate portions 6c arranged in the circumferential direction of the vehicle body. In the harmonica-type structure portion A1, the pitches of the connection plate portions 6c of the hollow section 10 are set at equal intervals.

  The harmonica type structure part A2 in the central part 1a of the eaves beam of FIG. 1 is connected from the connecting plate part 6c closest to the hollow profile 12 of the hollow profile 11 to the close proximity to the hollow profile 11 of the hollow profile 12 It corresponds to the area of the double skin structure 7 up to the plate portion 6c. The harmonica-type structure portion A2 has a plurality of (here, a total of two) connecting plate portions 6c disposed in the circumferential direction of the vehicle body.

  The harmonica type structure part A3 in the blowing part 3b of FIG. 1 is adjacent to the upper end of the hollow section 13 from the connecting plate 6c closest to the hollow section 14 of the hollow section 6 adjacent to the lower end of the hollow section 14 Corresponds to the area of the double skin structure 7 up to the connecting plate portion 6 c closest to the hollow profile 13 of the hollow profile 6. The harmonica type structure portion A3 has a plurality of (here, a total of 12) connecting plate portions 6c arranged in the circumferential direction of the vehicle body. In the harmonica type structure portion A3, the pitch of the connecting plate portion 6c positioned on the inner side of the hollow members 13 and 14 relative to the connecting plate portions 6c on both ends of the hollow members 13 and 14 when viewed from the vehicle longitudinal direction is It is set at equal intervals.

  Here, the window portion 3 a is formed by cutting between the blowing portions 3 b adjacent to each other in the side structure 3. The opening periphery of the window 3a needs to be processed into a complicated curved shape. For this reason, viewed from the longitudinal direction of the vehicle, as seen from the longitudinal direction of the vehicle, the truss-type structural portion having the connecting plate portion 6c disposed so as to be inclined to the plate surfaces of the inner plate portion 6a and the outer plate portion 6b In forming the window portion 3a by cutting by forming the blowing portion 3b with a harmonica-type structure portion having a connecting plate portion 6c disposed perpendicularly to the plate surface of the inner plate portion 6a and the outer plate portion 6b. Workability has a good advantage.

  In the hollow profile 15 constituting a part of the side beam 2a of FIG. 1, the other end of the hollow profile 15 is hollow profiled on the inner side and the outer side of the other end close to the hollow profile 16 A lap joint is formed for connection to the hollow section 15 and the one end adjacent thereto.

  The thickness dimension of the side beam 2a decreases from the top to the bottom. Along with this, in the harmonica structure portion A4, the length dimension of the connection plate portion 6c as viewed from the longitudinal direction of the vehicle decreases from the upper side to the lower side.

  The harmonica type structure portion A4 corresponds to a region of the double skin structure 7 from the connection plate portion 6c located on the lowermost side of the hollow section 16 to the connection plate portion 6c closest to the floor plate 8 of the hollow section 15 . The harmonica type structure portion A4 has a plurality (five in this case) of connecting plate portions 6c arranged in the circumferential direction of the vehicle body as a whole. In the harmonica-type structure portion A4, the pitches of the connection plate portions 6c are set at equal intervals.

  As an example, in each of the harmonica structure parts A1 to A4 and the truss structure parts B1 to B3, the plate thickness of the inner plate 6a and the outer plate 6b is larger than the plate thickness of the connecting plate 6c. It is set to. Further, as an example, in each of the harmonica-type structural portions A1 to A4, the plate thickness dimensions of the inner plate portion 6a and the outer plate portion 6b are set to the same value.

  In each of the harmonica-shaped structural portions A1 to A4 and the truss-shaped structural portions B1 to B3, the plate thickness dimension of the inner plate portion 6a and the outer plate portion 6b is equal to or less than the plate thickness dimension of the connecting plate portion 6c. It may be set to a value. Moreover, in each of the harmonica-type structure parts A1 to A4, the plate thickness dimensions of the inner plate part 6a and the outer plate part 6b may be set to values different from each other.

  Here, the reason why the shear strength of the harmonica double skin structure is lower than that of the truss double skin structure is considered as follows, for example. That is, in the truss-type double skin structure, the shear force acting in the direction perpendicular to the circumferential direction of the car body of the railway vehicle structure, that is, in the direction perpendicular to the plate surfaces of the inner and outer plate portions of the hollow member It tends to act as in-plane force (compression force or tension force) on the connecting plate portion of the hollow member. Therefore, in the truss type double skin structure, the connecting plate portion of the hollow member effectively resists such a shear force. Thereby, the truss-type double skin structure has relatively high shear strength.

  On the other hand, in the double-skin structure of the harmonica type, the shear force tends to act as a surface external force on the connecting plate portion of the hollow member. For this reason, in the harmonica double skin structure, when a shear force is applied, the connecting plate portion of the hollow member is more easily deformed than the connecting plate portion of the hollow member in the truss double skin structure. Therefore, the double skin structure of the harmonica type is considered to have lower shear strength to shear force than the double skin structure of the truss type.

  Thus, the double skin structure of the harmonica type, as compared to the truss type double skin section, the pressure acting on the railway vehicle structure due to the pressure difference between the inside and outside of the vehicle (the direction perpendicular to the circumferential direction of the vehicle body of the railway vehicle structure If the applied shear force is applied, it may cause large deformation and high stress.

  FIG. 3 is a simulation diagram showing the magnitude of the bending moment generated in the railway vehicle assembly 1 of FIG. 1 due to the pressure difference between the inside and outside of the vehicle. The arrow in FIG. 3 indicates that the longer the length dimension, the larger the bending moment, and the direction of the arrow indicates the direction perpendicular to the surface of the railway vehicle assembly at the starting point of the arrow. Further, the outline L1 in FIG. 3 corresponds to the outline of the railway vehicle assembly 1 viewed from the longitudinal direction of the vehicle in FIG. 1, and the line L2 shows a line passing through the tips of the plurality of arrows.

  As shown in FIG. 3, in the roof structure 4, the absolute value of the bending moment generated by the pressure difference between the inside and outside of the vehicle is the largest at the central portion 4a in the vehicle width direction, and is the largest at the central portion 1a in the vehicle body direction at the eaves It was found from the simulation results that the side structure 3 is the largest at the blow-in portion 3b. Although not shown, according to the results of another simulation, the position at which the absolute value of the bending moment reaches the maximum value is substantially the same, regardless of whether the air pressure difference between the vehicle and the vehicle is different or the air pressure inside and outside the vehicle is high. It turned out to be.

  FIG. 4 is a simulation diagram showing the magnitude of shear force acting on the railway vehicle assembly 1 in the direction perpendicular to the circumferential direction of the vehicle body by the bending moment shown in FIG. The outline L1 in FIG. 4 corresponds to the outline of the railway vehicle assembly 1 viewed from the longitudinal direction of the vehicle in FIG. 1, and the line L3 shows a line passing through the tips of the plurality of arrows. Further, the arrow in FIG. 4 indicates that the longer the length dimension, the larger the shear force, and the direction of the arrow indicates the direction perpendicular to the surface of the railway vehicle assembly 1 at the starting point of the arrow.

  As shown in FIG. 4, in the area where the absolute value of the bending moment is the maximum value in the area other than the joint where the side structure 3 of the rail car body structure 1 and the underframe 2 are joined, the rail car body structure 1 is used. It was found by simulation results that the shear force acting in the direction perpendicular to the circumferential direction of the vehicle body is sufficiently low.

  In addition, the area below the floor plate 8 that is a barrier for securing air tightness in the car in the side beam 2a of the underframe 2 is not airtight because it is located outside the rail vehicle, and substantially outside the car It is in an exposed state. Thus, the area is not affected by the pressure load exerted by the pressure difference inside and outside the vehicle. Therefore, the lower portion 2b of the side beam 2a located below the floor plate 8 can have a harmonica structure.

  As described above, in the railway vehicle structure 1, the harmonica type structural portions A1 to A4 are lower than the central portion 4a of the roof structure 4, the central portion 1a of the eaves girder, the blowing portion 3b of the side structure 3, and the floor plate 8 It is arrange | positioned in the position (at this all the positions in this embodiment) of at least one of the lower side parts 2b of the side beam 2a located in. According to the inventors' investigation, in the central portion 4a of the roof structure 4, the central portion 1a of the eaves girder, and the blowing portion 3b of the side structure 3, compared with the other positions of the railway vehicle structure 1, Even when a pressure load acts on the railway vehicle assembly 1, it is known that the shear force acting in the direction perpendicular to the circumferential direction of the vehicle body of the railway vehicle assembly 1 is sufficiently low.

  In addition, the area below the floor plate 8 in the side beam 2a of the underframe 2 is not affected by the pressure load acting due to the pressure difference between the inside and outside of the vehicle, so the lower side of the side beam 2a located below the floor plate 8 The part 2b can be a harmonica structure.

  Therefore, by arranging the harmonica type structural portions A1 to A4 at the above-described position of the rail vehicle body structure 1, the rail vehicle body structure 1 does not use the reinforcing frame while having the harmonica type structural portions A1 to A4. It can withstand the pressure load of the pressure difference due to the fluctuation of the external pressure with respect to the substantially constant internal pressure of the vehicle.

  Further, truss-type structural portions B1 to B3 are disposed adjacent to the harmonica-type structural portions A1 to A4 in the portion of the railway car body structure 1 having a large shear force acting on the rail car body structure 1. Because the harmonica-type structural portions A1 to A4 are disposed in the portion of the railway vehicle structure 1 where the shear force is small, the adjacent to the harmonica-type structural portions A1 to A4 of the railway vehicle structure 1 without using a reinforcement frame. The strength of the position to be

  Further, in the plurality of hollow members 6, the inner plates 6a are combined to form the inner wall 7a, and the outer plates 6b are combined to form the outer wall 7b. By using a plurality of hollow members 6 at the time of manufacturing the railway vehicle assembly 1, the double skin structure 7 of the side assembly 3 and the roof assembly 4 can be efficiently configured.

  Further, among the plurality of hollow members 6, the hollow members 6 (all the hollow members 6 in the present embodiment) forming at least the inner wall 7a and the outer wall 7b of the harmonica structure portions A1 to A4 are extruded Since it is a molding member, the hollow material 6 used for forming at least the harmonica-type structural parts A1 to A4 of the double skin structure 7 can be efficiently manufactured by the extrusion molding method.

  The present invention is not limited to the above embodiment, and the configuration can be changed, added, or deleted without departing from the spirit of the present invention. In each harmonica type structure part, the number of hollow members forming the outer wall part and the inner wall part is not limited to the number shown in the above embodiment, and can be appropriately adjusted.

A1 to A4 harmonica type structural parts B1 to B3 Truss type structural parts 1 Rail vehicle structure 1a central part of the eaves girder 2 frame 2a side beam 2b side beam lower part 3 side structure 3b blowout part 4 roof structure 4a roof structure Center part 6, 10 to 18 hollow profile 6a inner plate part 6b outer plate part 6c connecting plate part 7 double skin structure 7a inner wall part 7b outer wall part 8 floor board

Claims (4)

An underframe having side beams disposed on both sides in the vehicle width direction, a side structure disposed on both sides in the vehicle width direction of the underframe, and a roof structure disposed above the side structures;
The side structure, the roof structure, and the side beams are inner wall portions disposed on the inner side of the vehicle body, an outer wall portion disposed on the outer side of the vehicle body, and the inner wall portion and the outer wall portion. It has a double skin structure including a plurality of connecting plate portions connected in a separated state and viewed in the longitudinal direction of the vehicle as viewed in the longitudinal direction of the vehicle.
The double skin structure is a harmonica type in which a closed space formed by two adjacent connection plates of the plurality of connection plates, the inner wall and the outer wall is rectangular when viewed from the longitudinal direction of the vehicle A truss-type structure having a triangular shape and a closed space formed by the two connecting plate portions and the inner wall portion or the outer wall portion adjacent to the structure portion and the harmonica-type structure portion when viewed from the longitudinal direction of the vehicle Have and
The lower part of the side beam located lower than the central part of the roof structure in the vehicle width direction, the central part of the eaves girder in the circumferential direction of the vehicle body, the blowout part of the side structure, and the floor plate. A railway vehicle assembly which is located at least one of the side parts. The side structure and the roof structure have a plurality of hollow members disposed in the circumferential direction of the vehicle body as viewed from the longitudinal direction of the vehicle.
Each of the plurality of hollow members is disposed on an inner plate portion disposed on the inner side of the vehicle body, the connection plate portion, and the outer side of the vehicle body, and the inner plate portion and the plate surface are separated. Including the inner plate portion and the outer plate portion connected by the connecting plate portion in a state,
In the plurality of hollow members, the plurality of inner plate portions are combined to form the inner wall portion, and the plurality of outer plate portions are combined to form the outer wall portion. Rail vehicle structure as described in.   The railway according to claim 2, wherein the hollow member forming at least the inner wall portion, the outer wall portion and the connection plate portion of the harmonica structure portion among the plurality of hollow members is an extrusion-formed member. Vehicle structure.   The harmonica-type structure portion disposed at least one of the central portion of the roof structure, the blow-in portion of the side structure, and the lower portion of the side beam is viewed from the longitudinal direction of the vehicle The railway vehicle assembly according to any one of claims 1 to 3, further comprising three or more connection plate portions disposed continuously in the circumferential direction of the vehicle body.

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