KR100350034B1 - Side structure of railway vehicle - Google Patents

Abstract

The present invention provides a configuration for improving the buckling strength of the outer plate at the coupling portion with respect to the coupling configuration used for the frame member of the railway vehicle.

In the present invention, a reinforcing plate having a flange face parallel to the flange face on the outside of the longitudinal member is previously joined to the longitudinal member. In this case, the reinforcing plate is a portion surrounded by the longitudinal member and the outer plate and is disposed at a position parallel to the horizontal member. The flange faces of the outer plate and the reinforcing plate are joined to each other by spot welding to form a side structure.

By providing the reinforcing plate, since the axial force of the transverse member is smoothly transmitted to the remaining transverse members, the force acting on the outer plate is reduced, and the spacing between the fixing points of the outer plate is shortened, thereby improving the strength against buckling.

Description

Side structure of railway vehicle

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a thin plate structure using an intersecting framing member as an outer frame structure, and more particularly to a thin plate structure suitable for side vehicle structures of railroad cars.

For the high speed and energy saving of railroad cars, the weight reduction of the vehicle structure is one of the most important problems. The side structure for a conventional railway vehicle is configured such that a thin outer plate is integrally formed with a thin frame, thereby reducing weight and securing strength. An example of such a configuration for the side vehicle structure is described below with reference to FIGS. 13 to 16.

In FIG. 13, a plurality of longitudinal members 2 and a plurality of transverse members 3 are arranged to cross each other inside the outer plate 1. At each intersection, a three-dimensional joint 4 is arranged to join the three members of the outer plate 1, the longitudinal member 2, and the transverse member 3 to each other. The longitudinal member 2 and the transverse member 3 constitute a frame. The cross-sectional shape of the longitudinal member 2 and the transverse member 3 is hat-shaped, and each of the two flanges formed at the tip portion is in contact with the outer plate 1.

The hat shape is a U-shaped portion having a U-shaped cross section consisting of webs 2b and 3b and bottom faces 2c and 3c, as shown in FIG. 14, and flanges 2a and 3a provided at each tip of the web. It means the shape consisting of. At the intersection of the longitudinal member 2 and the transverse member 3, the longitudinal member 2 extends in the longitudinal direction and the transverse members 3, 3 are positioned next to the longitudinal member 2. . That is, the longitudinal member 2 takes precedence.

The three-dimensional joint 4 is for coupling the longitudinal member 3 and the transverse member 3 to each other, and is formed in a three-dimensional unitary structure. The three-dimensional joint 4, the flange 2a of the longitudinal member 2, and the outer plate 1 are joined to each other by spot welding 5A, and the center portion of the three-dimensional joint 4 and the longitudinal bonsai 2 is a spot. Joined together by welding 5B. The three-dimensional joint 4, the flange 2a of the horizontal member 3, and the outer plate 1 are joined to each other by spot welding 6A, and the center portion of the three-dimensional joint 4 and the horizontal member 3 is a spot. Joined together by welding 6B. The flange 2a of the longitudinal member 2 between the two solid flanges 4, 4 and the flange 3a of the transverse member 3 between the two solid flanges 4, 4 are spot welded 7. It is coupled to the outer plate 1 by each.

The end of the transverse member 3 is arranged near the web 2b of the longitudinal member 2. Thus, the end of the transverse member 3 overlaps the flange 2a of the longitudinal member 2. Thereby, the height of the edge part of the horizontal member 3 becomes shorter than the remainder by the thickness of the flange 2a of the longitudinal member 2.

Reference numeral 4 is a three-dimensional joint for joining the above-described frame, it is formed in a three-dimensional unitary structure. This three-dimensional joint is fixed to the longitudinal member by spot welding 5 and also fixed to the horizontal member by spot welding 6. The joining of the shell and frame structure within the range (distance d) between the three-dimensional joints consists of spot welding 7. In this case, since the flange of the transverse member 3 is continuously arranged on the side surface of the outer plate, the pitch of spot welding is arbitrarily determined. However, in the portion where the outer plate 1, the frame members 2 and 3, and the three-dimensional joint 4 overlap, the portions for the spot welding 8 are limited by the structure of the engaging portion.

In the above-described conventional structure, since the longitudinal member 2 and the outer plate 1 surrounded by the frame 1 are preferentially passed to the intersection of the frame, the horizontal member 9 (see FIG. 16) is formed. When the axial force from the longitudinal member is applied to the longitudinal member, a problem arises in which a discontinuous portion occurs in the axial force of the curved portion or the transverse member 3 outside the surface of the vehicle side structure, and therefore buckling occurs in a part of the outer plate. easy.

Other references related to the structure of a railway vehicle structure include "column structure of a railway vehicle", Japanese Patent Application Laid-Open No. 56-161853 (1981), "Coupling Structure of a Frame", Japanese Patent Application Laid-Open No. 59- 186762 (1984). Japanese Patent Application Laid-Open No. 56-161853 (1981) is aimed at preventing the transmission failure of axial force and the deterioration of bending stiffness caused by the discontinuity of the coupling portion of the pillar and the transverse member, and reinforcing structure of the pillar; And a reinforcement plate that reinforces the column and also serves as a member for attaching the inner structure and related devices. This reference does not mention local buckling prevention of the outer plates.

On the other hand, in Japanese Patent Application Laid-Open No. 59-186762 (1984), a frame and an outer plate are joined by joining. The structure of this reference has the effect of preventing the buckling of the shell. However, when the dangerous load condition is reached and the axial force is increased, there is a problem that the reliability of the strength of the adhesive material is lower than that of spot welding.

In the structure of the conventional railway vehicle structure, the axial force of the transverse member transmitted to the outer plate of the discontinuous portion enclosed by the hat-shaped longitudinal member and the outer plate preferentially passed is transmitted only by the outer plate of the cross-shaped coupling portion of the frame structure. Therefore, when the dangerous load condition, there is a problem in the body strength, such as local buckling of the outer plate of the discontinuous portion due to the bending of the outer surface of the vehicle structure or the axial compression force of the transverse member.

That is, in the conventional structure, since the cross section of the longitudinal member is hat-shaped, that is, the U-shaped cross section with one side opened, the distance between both sides of the U-shape is shortened. Therefore, when the axial force acts on the longitudinal member from the transverse member, the discontinuous portion is likely to occur in the lateral compression force of the outer plate of the vehicle side structure or the transverse member, and the buckling is likely to occur in the outer plate of the discontinuous portion under the dangerous load condition. .

It is an object of the present invention to provide a side structure for a railway vehicle having a strength that can withstand dangerous load conditions.

Another object of the present invention is to provide a side structure of a railway vehicle having strength and light weight that can prevent buckling of the outer plate.

One of the features of the present invention, the longitudinal member and the transverse member constituting the frame member; And a joint for coupling the longitudinal member and the transverse member to each other; In the side frame for railroad vehicle comprising a thin outer plate fixed to the frame member, at least one of the frame member having a hat-shaped cross section consisting of a pair of web and a flange extending from each end of the web,

A portion of the frame member enclosed by both webs of the frame member having a hat-shaped cross section and the outer plate and having a flange face coplanar with the flange face of the frame member at a position parallel to the intersection of the other members of the frame member; A reinforcement plate is disposed and coupled to the frame member,

The flange face of the reinforcement plate and the outer plate are joined by welding.

In another aspect of the present invention, in the above-described railroad vehicle side structure, both ends of the reinforcement plate is in contact with both webs of the frame member, while both end portions of the reinforcement plate are coupled to the web of the frame member. Will be.

According to another aspect of the present invention, in the railroad vehicle side structure, the cross-sectional shape of the reinforcing plate along the longitudinal direction of the hat-shaped frame member includes an L-shaped portion formed by a combination of a vertical portion and a flange portion, An end surface of the vertical portion is coupled to both webs of the frame member, and the flange portion is spot welded to the outer plate.

Still another feature of the present invention is the cross-sectional shape of the reinforcing plate provided in the longitudinal direction of the hat-shaped frame member in the railroad vehicle side structure, the U-shaped base portion and the L-shaped extending to both sides of the U-shaped base portion Combining flange portions, end surfaces of both sides of the base portion are coupled to both webs of the frame member, and the flange portion is parallel to the bottom surface of the base portion and is spot welded to the outer plate.

Another aspect of the present invention, in the side structure for a railway vehicle, the cross-sectional shape of the reinforcement plate provided in the longitudinal direction of the hat-shaped frame member is formed by combining the base and the web of both sides of the base portion. In shape, the webs at both ends are respectively coupled to the both webs of the frame member, and the base is coupled to the outer plate by spot welding.

According to the present invention, in the engaging portion of the frame member having a hat-shaped cross-section, the reinforcement plate is installed inside the U-shaped portion having a U-shaped cross-section, so that the reinforcement plate functions as a supporting member, so that the reinforcement plate and the outer plate are coupled to each other. The outer plate can be prevented from buckling. This provides a configuration of a side vehicle structure that can withstand dangerous load conditions.

Further, according to the present invention, at least one point between the above two points can be further fixed by spot welding, so that the distance L between the fixing points of the outer plate is shortened. Thereby, the strength against buckling due to the bending of the outer surface of the outer plate and the load transfer of the axial force can be improved.

By applying the present invention to the side structure for railway vehicles as a means for forming a frame for a lightweight thin-vehicle vehicle structure, the effect of preventing strain occurring in the outer plate during the manufacture of the vehicle structure, and preventing the buckling of the outer plate under dangerous load Can be obtained. In addition, since the joining of the reinforcing plate and the outer plate can be made by spot welding, like other frames, the appearance disharmony due to the increase in the number of spot welding points is also prevented.

In addition, under dangerous load conditions, by adding a reinforcing plate having an appropriate thickness to the outside of the reinforcing plate in advance and bonding it to the outer plate, the strength against buckling is improved without increasing the weight.

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

1 is a view of the side structure constituting the side of the railway vehicle viewed from the inside of the vehicle. Reference numeral E denotes an entrance for passengers. The three-dimensional joint 4 is arranged at the intersection to joint the three members of the outer shell 1, the longitudinal member 2, and the transverse member 3 with each other, length The directional member 2 and the lateral member 3 constitute a frame.

The present invention uses the configuration shown in FIGS. 2 to 4 as the configuration for the three-dimensional joint portion of the side vehicle structure. In the drawings, the cross-sectional shape of the longitudinal member 2 and the transverse member 3 is shown. Is hat-shaped, and two flanges of the end contact the outer plate 1. As described above, the hat shape means a shape consisting of a U-shaped portion having a U-shaped cross section consisting of a web and a bottom, and a flange formed at each end of the web.

The three-dimensional joint (4) is a joint for coupling the frame members (2, 3), the outer plate side flange (4a); It consists of an indoor side flange 4b and a web 4c connecting both flanges. The three-dimensional joint 4 is fixed by the spot welding 5 to the longitudinal member 2 and the spot welding 6 to the transverse member 3. The joining of the shell 1 and the frame between the three-dimensional joints (distance d) consists of spot welding 7. The joining of the triple part of the outer plate, the frame member, and the three-dimensional joint consists of spot welding 8.

The reinforcement plate 10 whose flange surface 10a is parallel to the flange surface 2a of the longitudinal member is previously joined inside the U-shaped portion of the longitudinal member 2, in this case, the reinforcement plate 10 ) Is arranged at a position surrounded by the longitudinal member 2 and the outer plate 1 at a position parallel to the horizontal member 3. That is, the reinforcement board 10 is arrange | positioned in the range L2 on the extension line of the flanges 3a and 3a of the horizontal member 3. The upper and lower ends of the reinforcing plate 10 may protrude upward and downward from the range L2 of the flanges 3a and 3a. Then, the flange 10a of the outer plate 1 and the reinforcing plate 10 is joined to each other by spot welding 11, 12.

In general, as shown in FIG. 5, the dangerous buckling stress σ cr for the plate is expressed by the following equation.

Where E is the Young's modulus of the plate

v: Poisson's ratio

t: thickness of the plate

a: the length of the long side of the rectangle

b: the length of one side of the rectangle

K: Coefficient determined by the distribution of stress, ambient conditions, and a / b ratio. In general, K increases as a / b decreases.

In the above equation, when t and b are constant, K increases as a decreases, thus increasing the risk buckling stress σ _cr . From this fact, it becomes clear that when the thickness of the plate is constant, the buckling hardly occurs as the gap between the fixing points (the length of the long side a) is shortened.

In the present invention, in consideration of the above fact, the outer plate is fixed to the frame members 2 and 3 by spot welding at a number of points including on the flange face 10a of the reinforcing plate 10.

Next, the manufacture of the three-dimensional joint portion of the side vehicle structure according to the present invention will be described with reference to FIGS. 6 is a perspective view showing an embodiment of the reinforcing plate 10 according to the present invention. The reinforcing plate 10 includes the flange faces 10a and 10aa in contact with the outer plate 1, the bottom face 10c in contact with the bottom face 2c of the longitudinal member 2, and the web of the longitudinal member 2. It has the side surface 10b which contacts the surface 2b, 2b.

As shown in FIG. 7, the longitudinal member 2 has flange faces 2a and 2a. The side end portion 10b of the reinforcing plate 10 is strongly fixed to the web surfaces 2b and 2b of the longitudinal member 2 by welding 15.

8 is a perspective view showing the transverse member 3 combined with the three-dimensional joint 4. The transverse member 3 includes the flange faces 3a, 3a, the bottom face 3c, and the flange face which are fixed to the outer plate side flanges 4a and 4a of the three-dimensional joint 4 and the indoor flange 4b. It has webs 3b and 3b between bottoms.

9 is a perspective view showing a combined state of the frame consisting of the longitudinal member 2 and the transverse member 3. The reinforcement board 10 is arrange | positioned at the position enclosed by the longitudinal member 2 and the outer board 1 at the parallel line position which intersects the horizontal member 3. The side ends 10b and 10b of the reinforcing plate are previously joined to the web faces 2b and 2b of the longitudinal member 2.

The outer plate 1 is coupled to the flange faces 10a and 10aa of the reinforcing plate on the same plane as the flange faces 2a and 2a of the longitudinal member. That is, when the outer plates 1 and 1a are combined in such a frame, the outer plates 1 are joined to the flange faces 10aa and 10a by spot welding 11 and 12. 14 is a perspective view showing a frame having the outer plate 1.

10 is a perspective view showing the structure of a frame in which an outer plate is attached to the frame. Reference numeral 11 denotes a double spot welding point of the flange face 10aa of the reinforcing plate 10 and the outer plate 1a. Reference numeral 12 denotes a triple spot welding point of the flange face 10b of the reinforcing plate 10 and the outer plates 1, 1a. Reference numeral 14 is one of the electrodes for spot welding (FIG. 3), and holes 16 and 16 are formed at the bottom of the longitudinal member 2, so that the electrodes 14 are flanges 10aa and 10a. To the opposite side of the The distance between the spot welding points 11 to 12 is slightly smaller than the distance L1 between the flanges 3a and 3a of the transverse member. The position 12 of the spot welding is a part where the outer plate 1a and the outer plate 1 overlap and are welded together. The outer plate 1a is disposed outside the outer tube 1. Therefore, the outer plate 1a arrange | positioned at the outer side has the stage 13 by the thickness of the outer plate 1. This is referred to as so-called "stepping".

By such a configuration, it is possible to obtain a structure in which the buckling does not occur in the outer shell even when a dangerous load is reached. That is, the distance L between the fixing points is shortened, for example, since it is shortened by about 1/2 compared with the conventional method of fixing the exterior 1 to the flange portion of the outer plate of the longitudinal member 2 from the outside. It is possible to improve the strength against buckling due to the bent portion and the axial force transfer load on the surface of the outer plates 1 and 1a.

In the conventional method, spot welding is a position where the outer plate 1 and the outer plate 1a overlap between the webs 2b and 2b of the longitudinal member 2 (i.e., the position near the tip of the outer plate 1, 1a). ) Is not done. Therefore, when the axial force acts at this position from the transverse member 3, the outer plates 1, 1a near this position (near the tip end) are likely to buckle, as is known. In particular, the tip is easily bent. However, in the above-described embodiment, the overlapping outer plates 1 and 1a are fixed to the flange faces 10a and 10aa of the reinforcing plate 10 fixed to the longitudinal member 2, so that they can be prevented from bending. have.

The configuration of the three-dimensional joint portion of the vehicle side structure according to the present invention is a very effective means for forming a frame of a lightweight thin-vehicle vehicle structure that prevents the outer plate deformation during manufacturing of the vehicle structure and prevents the outer plate from bending under dangerous load conditions. . In addition, since the joining of the reinforcing plate and the outer plate can be made by spot welding like other frames, the appearance disharmony does not occur due to the addition of the number of spot welding points.

The reinforcing plate 10 of the coupling part is strongly fixed in advance to the longitudinal member 2 by welding 15, and eventually the axial force of the transverse member 3 is through the outer plate 1 coupled to the reinforcing plate and the reinforcing plate. It is smoothly transmitted to the horizontal member 3 on the opposite side. In addition, by combining the reinforcing plate 1 and the outer plate 1 by spot welding 11, 12, the distance between the fixing point of the outer plate is shortened, the strength to the buckling can be substantially improved.

The reinforcement plate 10 has a flange 10b, and the height from the flanges 10a and 10aa to the bottom portion 10c coincides with the height from the inner side of the bottom portion 2c of the frame member 2 to the flange 2a. It is preferable. Thereby, when the reinforcement board 10 is inserted inside the frame member 2, the surface of the flanges 10a and 10aa and the surface of the flange 2a become the same level. Therefore, it is not necessary to prepare a special positioning jig, and the welding work can be easily performed.

The welding position 15 of the reinforcing plate 10 is provided at a position facing the web 2b. Since welding is not performed at the positions of the flanges 2a and 10a, cutting of the weld bead in that portion is not necessary.

Since the position of the welding 15 is near the position of the flange 2a, the welding operation can be easily performed.

The distance between the webs 10b-10b of the reinforcing plate 10 is equal to the distance between the webs 3b-3b of the transverse member 3. The width of the flanges 10a, 10aa is the width of the flanges 3a, 3a. Same as width Thus, deformation of the longitudinal member 2 is prevented, and the axial force of the transverse member 3 can be transmitted to the opposite transverse member 3 via the longitudinal member 2.

When the load condition is greater, by adding another reinforcing plate having a suitable thickness to the outer side of the outer plate and joining the outer plate 1, the strength against buckling can be improved without increasing the weight.

The present invention has a cross section consisting of a web that couples the outer flange, the inner flange and both flanges, as well as the railroad car, and uses the intersecting members as the frame for the outer plate, the buckling that occurs in the outer plate including the discontinuous coupling of the members. It is also applicable to the structure that prevents.

In order to apply the present invention, it is sufficient that the at least one longitudinal member 2 and the transverse member 3 have a hat-shaped cross section. The reinforcement plate may be fixed to a frame having a hat-shaped cross section. The joint can use not only the three-dimensional joint but also other flat joint members.

As described above, according to the present invention, by providing a reinforcing member at the joint between the members of the thin plate vehicle frame, it is possible to provide a side vehicle structure that can withstand even a large load condition. In other words,

1) The reinforcing plate 10 provided in the coupling member of the longitudinal member 2 is formed in a single structure, and can be assembled to the frame in a part state.

2) Since the reinforcing plate 10 is disposed at a position on the extension line of the horizontal member, the axial force of the horizontal member can be smoothly transmitted.

3) In the conventional structure, the outer plate facing the central portion of the coupling member is coupled to the longitudinal member 2 and the transverse member 3 by spot welding, as shown in FIG. The distance between them becomes L, and due to the structure it is impossible to decrease smaller than this distance. In the present invention, since the reinforcing plate 10 is arranged to couple the outer plate to the reinforcing plate 10 by spot welding 11 and 12, the distance between the fixing points of the outer plate can be shortened, and thus, the buckling of the outer plate of the engaging portion. The opposing strength can be improved.

11 shows another embodiment of the reinforcement plate 10, in which two reinforcement plates 10A and 10B having a shortly divided C shape (channel shape) are used in combination, and each web 10Ac and 10Bc. Is welded (15, 17) to the web (2b) of the longitudinal member (2).

The flanges 10Aa and 10Ba correspond to the flanges 10aa and 10a, respectively.

12 shows another embodiment of the reinforcement plate 10, in which a reinforcement plate 10C extending in the longitudinal direction of the longitudinal member is used, and the flange 10Cc bends both ends of the reinforcement plate in the longitudinal direction. Is formed. The flange 10Cc is welded 15 to the web 2b. The flange 10Ca between the flanges 10Cc and 10Cc is also welded to the flange 2a. The bead of the weld is cut and finished flat.

In the case where the transverse member 3 is given priority with respect to the longitudinal member, the reinforcing plate 10 is disposed in the space of the transverse member 3.

According to the present invention, by arranging the reinforcement plate in the engaging portion of the members of the vehicle frame structure using the thin plate, there is provided a side structure for a railway vehicle that can overcome the dangerous load condition.

Then, since the reinforcing plate is disposed on the extension line of the other frame member intersecting with the one frame member having priority between the longitudinal member and the transverse member, the axial force of the other frame member is smoothly transmitted.

In addition, since the distance between the fixed positions of the outer plate can be shortened compared to the conventional structure, the strength against the buckling of the outer plate at the engaging portion can be improved.

1 is a frontal front view showing the general frame configuration of the vehicle side structure to which the present invention is applied,

FIG. 2 is a front view showing an embodiment of the joint structure according to the present invention used as the joint of the cross-shaped frame of FIG.

3 is a cross-sectional view taken along the line D-D of FIG.

4 is a cross-sectional view taken along line E-E of FIG.

5 is a stress calculation model for the buckling limit of the plate,

6 is a perspective view showing the reinforcing plate of the embodiment of FIG.

7 is a perspective view showing a longitudinal member having a reinforcing plate of the embodiment of FIG.

8 is a perspective view showing a horizontal member coupled to a three-dimensional joint in the embodiment of FIG.

9 is a perspective view of a combination of the longitudinal member and the transverse member in the embodiment of FIG. 2,

10 is a perspective view showing a vehicle structure of a frame attached to an outer plate in the embodiment of FIG.

11 is a perspective view showing another embodiment of the reinforcing plate according to the present invention,

12 is a perspective view showing another embodiment of the reinforcing plate according to the present invention,

13 is a front view showing an example of a conventional joint structure used as the cross frame joint of FIG.

14 is a perspective view three-dimensionally showing the right portion of FIG.

15 is a cross-sectional view taken along line B-B of FIG. 13,

16 is a cross-sectional view taken along the line C-C of FIG.

※ Explanation of symbols about main part of drawing ※

1: Outer plate 2: Length member 3: Horizontal member

4: solid joint 5, 6, 7, 8: spot welding

9 longitudinal member blank portion 10, 17, 18 reinforcement plate 11 double spot welding

12: triple spot welding 13: end bonding 14: electrode

15: welding

Claims (11)

A longitudinal member and a transverse member forming the frame member; And a joint for coupling the longitudinal member and the horizontal member to each other; In the side frame for railroad vehicle comprising a thin outer plate which is fixed to the frame member, at least one of the frame member has a hat-shaped cross section consisting of a pair of web and a flange extending from each end of the web, A flange face which is coplanar with the flange face of the frame member at a position parallel to the frame intersecting with the other frame member of the frame member in a portion surrounded by both webs and the outer plate of the frame member having a hat-shaped cross section. The reinforcing plate having is disposed and coupled to the frame member, The flange surface of the reinforcement plate and the outer plate side structure for a railway vehicle, characterized in that coupled by welding. The method of claim 1, Both ends of the reinforcement plate is in contact with both webs of the frame member, while both side ends of the reinforcement plate is coupled to the web of the frame member, the side structure for a railway vehicle. The method of claim 1, The reinforcement plate and the outer plate side structure for a railway vehicle, characterized in that coupled by spot welding. The method of claim 1, The cross-sectional shape of the reinforcement plate along the longitudinal direction of the hat-shaped frame member includes an L-shaped portion formed by a combination of a vertical portion and a flange portion, and the end surface of the vertical portion is coupled to both webs of the skeleton member. The side structure for the railway vehicle, characterized in that the flange portion is coupled to the outer plate by spot welding. The method of claim 1, The cross-sectional shape of the reinforcement plate along the longitudinal direction of the hat-shaped frame member is a combination of a U-shaped base portion and an L-shaped flange portion extending to both sides of the U-shaped base portion, and end surfaces of both sides of the base portion are the frame. And a flange portion coupled to both webs of the member, the flange portion being parallel to a bottom surface of the base portion, and coupled to the outer plate by spot welding. The method of claim 1, The cross-sectional shape of the steel plate along the longitudinal direction of the hat-shaped frame member is a U-shape formed by combining the base and the webs on both sides of the base, the webs at both ends are connected to both webs of the skeleton member. Each coupled, the base portion is a side structure for a railway vehicle, characterized in that coupled to the outer shell by welding welding. The method of claim 5 or 6, The plurality of U-shaped reinforcement plate is a side structure for a railway vehicle, characterized in that disposed in the longitudinal direction of the frame member having a cross section of the U-shaped and hat-shaped. The method of claim 5 or 6, When the frame member intersecting with the frame member having priority is a hat-shaped frame member, the distance between both webs of the cross-hat-shaped frame member becomes equal to the distance between the two U-shaped webs of the reinforcing plate. And both webs of the reinforcing plate are disposed on an extension line of a flange of the intersecting hat-shaped frame member in a longitudinal direction of the intersecting hat-shaped frame member. The method of claim 1, A frame member for the reinforcement plate is disposed side structure for a railway vehicle, characterized in that the longitudinal member. The method of claim 4, wherein And a height from the flange of the reinforcement plate to the vertical portion is the same as the height of the web of the frame member. A longitudinal member and a transverse member forming the frame member; And a joint for coupling the longitudinal member and the transverse member to each other; And a thin outer plate secured to the frame member, wherein at least one of the skeleton members has a hat-shaped cross section consisting of a pair of webs and flanges extending from each end of the web, wherein the outer plate is a plate of two sheets. One of the two plates is disposed on the lower side of the flange in contact with the flange of the transverse member, the other one is disposed on the upper side of the flange overlapping the one plate, the two plates and the Flanges are welded side structures for railway vehicles, In a portion surrounded by both webs and the outer plate in the longitudinal member, a reinforcement plate having a flange surface coplanar with the flange surface of the longitudinal member is disposed at a position on an extension line of the horizontal member, wherein the length Combined with a direction member, Both ends of the reinforcing plate is connected to both webs of the frame member, Flange surface of the reinforcement plate and the outer plate side structure for a railway vehicle, characterized in that coupled by spot welding