JPH0930414A - Side gutter body for rail-way rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the buckling strength of an outer plate by combining a reinforcing plate for a skeleton member with the skeleton member at a part of the skeleton member surrounded by both webs and the outer plate and on a parallel line crossing other members of the skeleton member, and welding the flange surface of the reinforcing plate to the outer plate. SOLUTION: An outer plate 1 is connected to the flange surface of a reinforcing plate, which is formed into the nearly same flat surface with the outer plate side flange surface of a vertical member 2, by spot welding. Namely, at the time of combining the outer plate 1 with this skeleton structure, the outer plate 1 is welded to the flange surface by the spot welding 11, 12. The spot welding 11 is the two-ply welding of the outer plate and the flange surface of the reinforcing plate. The spot welding 12 is the three-ply welding of the outer plate and the flange surface of the reinforcing plate. A distance between the spot weldings 11-12 is a little smaller than the distance L2 between the flange surfaces of lateral members 3. Since the outer plate is arranged outside of the outer position, the outer position is provided with a stage difference by the plate thickness of the outer plate 1. With this structure, even in the hard loading condition, buckling of the outer plate can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin plate structure using crossed frame members as a frame of an outer plate, and more particularly to a thin plate structure suitable for use as a side structure of a railway vehicle. Is.

[0002]

2. Description of the Related Art In order to speed up a railway vehicle and save energy, weight reduction of a vehicle structure is one of the important matters.
A side structure of a conventional railroad vehicle is configured by integrally joining a thin-walled outer plate to a thin-framed structure by spot welding or the like in order to secure strength while reducing weight. An example of such a side structure will be described with reference to FIGS. In FIG. 13, a plurality of vertical members 2 and a plurality of horizontal members 3 are arranged inside the outer plate 1 so as to intersect each other. The three-dimensional joint 4 is arranged at the intersection, and the outer plate 1, the vertical member 2, and the horizontal member 3 are arranged.
The three parties are combined together. The vertical member 2 and the horizontal member 3 form a skeleton. The cross-sectional shapes of the vertical member 2 and the horizontal member 3 are hat-shaped, and the two flanges at the tips are the outer plates 1 respectively.
Is in contact with

As shown in FIG. 14, the hat type is a U-shaped U-shaped section having webs 2b and 3b and bottom surfaces 2c and 3c.
It is a shape composed of a U-shaped portion and flanges 2a and 3a provided on the tip of the U-shaped portion. At the intersection of the vertical member 2 and the horizontal member 3, the vertical member 2 is continuous in the vertical direction, and the horizontal members 3 are provided on both sides of the vertical member 2. That is, the vertical member 2 has priority.

The three-dimensional joint 4 is integrally three-dimensionally shaped to connect the vertical member 2 and the horizontal member 3. Spot welding 5A, three-dimensional joint 4, flange 2 of vertical member 2
a and the outer plate 1 are joined together, and the three-dimensional joint 4 and the central member of the vertical member 2 are joined together by spot welding 5B. Spot welding 6A, three-dimensional joint 4, flange 2 of lateral member 3
a and the outer plate 1 are connected, and the three-dimensional joint 4 and the member at the center of the lateral member 3 are connected by spot welding 6B. Two
The flange 2a of the longitudinal member 2 between the three three-dimensional joints 4, 4,
The flanges 3 a of the lateral member 3 are joined to the outer plate 1 by a plurality of spot welds 7, respectively.

As shown in FIG. 16, the end of the lateral member 3 is
It is located near the web 2b of the vertical member 2. Therefore, the end of the horizontal member 3 overlaps the flange 2 a of the vertical member 2. Therefore, the height of the end portion of the horizontal member 3 is short by the thickness of the flange 2a of the vertical member.

Reference numeral 4 denotes a three-dimensionally integrally molded three-dimensional joint for connecting the frames, which is fixed to the vertical member by spot welding 5 and to the horizontal member by spot welding 6, respectively. The connection between the outer plate and the frame between the space joints (dimension d) is performed by spot welding 7. In this case, since the outer plate side flanges of the lateral members 3 are continuously arranged, the spot welding pitch can be arbitrarily determined. However, the outer plate 1, the frame members 2, 3 and the three-dimensional joint 4 are three pieces. The position of the overlap spot weld 8 is restricted by the structure of the joint portion.

In the above-mentioned conventional structure, since a blank portion 9 (see FIG. 16) surrounded by the vertical member 2 and the outer plate 1 that are preferentially passed through is formed at the intersection of the skeletons, the vertical member is a horizontal member. When an axial force is applied from the above, a discontinuous portion is likely to occur in the out-of-plane bending of the vehicle body side structural portion and the transmission of the axial force of the lateral member 3, and when the load condition is severe, the outer plate of the relevant portion is likely to bend. There are drawbacks.

[0008] In addition, regarding the structural structure of railway vehicles, etc., Japanese Utility Model Laid-Open No. 56-161853, "Column structure in railway vehicles"
Also, there are known examples such as JP-A-59-186762 "framework joint structure". Japanese Utility Model Laid-Open No. 56-161853 is intended to prevent transmission failure of axial force and decrease in bending rigidity due to discontinuity of connection between the column and the lateral member. A pillar structure is shown which is a reinforcing pillar that reinforces this pillar and also serves as a lining plate and a fixture mounting material. This prior art does not mention local buckling prevention of the skin.

Further, in Japanese Patent Laid-Open No. 59-186762, the frame and the outer plate are joined by a joining material. This known example is effective in preventing buckling of the outer plate. However, when the load condition becomes strict and the axial force of the lateral member becomes large, the adhesive has a problem that the reliability of strength is inferior to that of spot welding.

[0010]

In the structure of a railway vehicle structure known in the related art, in the cross joint portion of the skeleton, the hat-shaped frame vertical member that is preferentially passed through and the outer plate of the discontinuous portion surrounded by the outer plate are provided. The transmitted axial force of the lateral member is transmitted only by the outer plate. Therefore, when the load condition is severe, there is a problem in the strength of the vehicle body, such as a local buckling phenomenon occurring in the outer plate of the vehicle body side portion during the out-of-plane bending and the transmission of the axial force of the lateral member. there were. That is, in the above conventional structure, the vertical member has a hat-shaped cross section, that is, a U-shaped cross section with one end open,
The space between the two sides of the U-shape tends to shrink. Therefore, when an axial force is applied to the vertical member from the lateral member, a discontinuous portion is likely to occur in the out-of-plane bending of the vehicle body side structure or the transmission of the axial force of the lateral member. It has the drawback that it tends to bend.

An object of the present invention is to provide a side structure for a vehicle having a strength capable of withstanding severe load conditions.

Another object of the present invention is to provide a side structure for a vehicle which is lightweight and has a strength capable of preventing buckling of an outer plate.

[0013]

SUMMARY OF THE INVENTION The present invention is directed to a vertical member and a horizontal member that form a frame member, a joint for integrally connecting the vertical member and the horizontal member, and a thin outer member fixed to the frame member. A plate, wherein at least one of the frame members is a side structure of a railway vehicle composed of a frame member having a hat-shaped cross-section having a pair of webs and a flange surface extending from each web end, and the flange of the frame member. A reinforcing plate having a flange surface that is flush with the surface, a portion surrounded by both webs of the frame member having the hat-shaped cross-sectional shape of the frame and the outer plate, and the other member of the frame member. At a position on the intersecting parallel lines, the frame member is connected to the frame member, the flange surface of the reinforcing plate and the outer plate,
It is characterized by being joined by welding.

Another feature of the present invention is that, in the side structure of the railway vehicle, both ends of the reinforcing plate are in contact with both webs of the frame member, and both end surfaces of the reinforcing plate are the webs of the frame member. It has been combined with.

Another feature of the present invention is that, in the side structure of the railway vehicle, the reinforcing plate has an L-shaped cross-section along the longitudinal direction of the hat-shaped frame member which is a combination of a vertical portion and a flange portion. It includes a mold portion, an end surface of the vertical portion is connected to both the webs of the frame member, and the flange portion is connected to the outer plate by spot welding.
Another feature of the present invention is the side structure of the railway vehicle, wherein the reinforcing plate has a U-shaped base portion and an L-shaped cross-sectional shape along the longitudinal direction of the hat-shaped frame member. A flange portion of the mold, wherein both end surfaces of the base portion are respectively coupled to the webs of the frame member, the flange portion is parallel to the bottom surface of the base portion, and the flange portion is It is connected to the outer plate by spot welding.

Another feature of the present invention is that, in the side structure of the railway vehicle, the reinforcing plate has a cross-sectional shape along the longitudinal direction of the hat-shaped frame member that is a combination of a base portion and webs on both sides thereof. It is U-shaped, and the webs on both sides are respectively connected to both webs of the frame member, and the base portion is connected to the outer plate by spot welding.

According to the present invention, in the joint portion of the frame member having the hat-shaped cross section, by disposing the reinforcing plate in the U-shaped section having the U-shaped cross section, the reinforcing plate functions as a strut member, and Since the reinforcing plate and the outer plate are connected to each other, it is possible to provide a side structure that prevents the outer plate from buckling and can withstand severe load conditions.

Further, according to the present invention, since the flange portion is connected to the outer plate by spot welding, the distance L between fixing of the outer plate can be shortened. Therefore, it is possible to improve the buckling strength due to the out-of-plane bending of the outer plate and the axial force transmission load.

By applying the present invention to the side structure of a railroad vehicle, as means for constructing a framework of a lightweight thin plate body structure, the outer plate is prevented from being distorted at the time of manufacturing the structure, and the outer plate is buckled under severe load conditions. It is effective in preventing. Further, since the connection of the outer plate to the reinforcement can be performed by spot welding like other frames, there is no discomfort in appearance due to the addition of this spot welding.

Further, when the load condition is more severe, if a reinforcing plate having an appropriate thickness is added in advance to the outer plate side of the reinforcing plate and coupled with the outer plate, the weight is not increased and the buckling is further increased. The strength can be improved.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a drawing of a side structure that constitutes a side surface of a railway vehicle as viewed from the inside. E is a space for passenger entrances and exits. A plurality of vertical members 2 and a plurality of horizontal members 3 are arranged inside the side plate 1 so as to intersect each other. A three-dimensional joint 4 is arranged at the intersection to integrally connect the outer plate 1, the vertical member 2, and the horizontal member 3. Vertical member 2 and horizontal member 3
Constitutes the skeleton.

The present invention adopts the structure shown in FIGS. 2 to 4 as the structure of the side structure three-dimensional joint portion of the vehicle. In the figure, the cross-sectional shapes of the vertical member 2 and the horizontal member 3 are hat-shaped, and the two flanges at the tips are in contact with the outer plate 1. As described above, the hat type is a U-shaped section having a U-shaped cross section, which includes a pair of webs and a bottom surface, and the U-shaped section.
The shape is defined by the flanges provided at the tip of the web of the shaped portion.

The three-dimensional joint 4 is a joint for connecting the two frame members 2 and 3, and comprises an outer plate side flange 4a, an indoor side flange 4b and a web 4c connecting both flanges. The space joint 4 is fixed to the vertical member 2 by spot welding 5 and to the horizontal member 3 by spot welding 6. The connection between the outer plate 1 and the frame between the space joints (dimension d) is performed by spot welding 7. Further, the three-layer joining of the outer plate, the frame member and the three-dimensional joint is performed by spot welding 8.

In the present invention, the reinforcing plate 10 having the flange surface 10a which is flush with the outer plate side flange surface 2a of the vertical member 2 is previously joined to the U-shaped portion of the vertical member 2. At this time, the reinforcing plate 10 is arranged in a position surrounded by the vertical member 2 and the outer plate 1 and at a position on a parallel line intersecting with the horizontal member 3. That is, the reinforcing plate 10 exists within the range L2 on the extension line of the ends of the flanges 3a, 3a of the lateral member 3. As shown in FIG. 2 and the like, the upper and lower ends of the reinforcing plate 10 may protrude more vertically than the range L2 of the flanges 3a, 3a. Then, the flange surface 10 of the outer plate 1 and the reinforcing plate 10
a is connected by spot welding 11 and 12.

Generally, the buckling limit stress σcr of a flat plate as shown in FIG. 5 is given by the following equation 1.

[0026]

[Equation 1]

Here, E: longitudinal elastic modulus of flat plate ν: Poisson's ratio t: thickness of plate a: length of long side of rectangle b: length of short side of rectangle K: stress distribution, peripheral conditions, length ratio a A coefficient determined by / b, and generally K increases as a / b decreases.

In the above equation, when t and b are constant, K increases as a decreases, and the buckling limit stress σcr increases. From this, it can be seen that when the plate thickness t is constant, the smaller the fixed distance (the length a of the long side), the less likely buckling occurs.

In view of the above, the present invention is to fix the outer plate to the frame members 2 and 3 by spot welding at multiple points including on the flange surface 10a of the reinforcing plate 10.

The manufacturing situation of the three-dimensional joint portion of the side structure of the vehicle according to the present invention will be described with reference to FIGS. 6 to 10. FIG. 6 shows a perspective view of the reinforcing plate 10 according to an embodiment of the present invention. Reinforcement plate 10
Has flange surfaces 10a, 10a in contact with the outer plate 1, a bottom surface 10c in contact with the bottom surface 2c of the vertical member 2, and side edges 10b in contact with the web surfaces 2b, 2b of the vertical member 2.

As shown in FIG. 7, the vertical member 2 has flange surfaces 2a, 2a. The reinforcing plate 10 has its side 10 in advance.
b is firmly fixed to the web surfaces 2b, 2b of the vertical member 2 by welding 15.

FIG. 8 shows a perspective view of the lateral member 3 in which the space joint 4 is combined. The lateral member 3 has flange surfaces 3a and 3a.
And a bottom surface 3b and webs 3c, 3c between them,
The three-dimensional joint 4 is fixed to the outer plate side flanges 4a and 4a and the indoor side flange 4b, respectively.

FIG. 9 shows a perspective view of a combination of the frame members composed of the vertical member 2 and the horizontal member 3. The reinforcing plate 10 is arranged at a position surrounded by the vertical member 2 and the outer plate 1 and on a parallel line intersecting with the horizontal member 3. The side edges 10b, 10b of the reinforcing plate 10 are previously fixed to the web surfaces 2b, 2b of the vertical member 2 by welding 15.

Flange surfaces 2a, 2a on the outer plate side of the vertical member 2
Flange faces 10a, 10aa of the reinforcing plate that are flush with
The outer plate 1 is joined to the outer plate 1 by spot welding. That is,
When the outer plates 1 and 1a are combined with this frame structure, the outer plate 1 is attached to the flange surface 10aa by spot welding 11 and 12.
Bind to 10a. FIG. 14 is a perspective view of the structure to which the outer plate 1 is attached.

Reference numeral 11 shows spot welding of two sheets of the outer plate 1a and the flange surface 10aa of the reinforcing plate 10 which are stacked. 12
Shows spot welding of three layers of the outer plates 1 and 1a and the flange surface 10b of the reinforcing plate 10. Reference numeral 14 is one electrode for spot welding, and the bottom portion 2c of the vertical member 2 is provided so that the electrode 14 can be inserted into the back surfaces of the flanges 10aa, 10a.
Are provided with holes 16 and 16. Spot welding 11-1
The distance between the two is the distance L2 between the flanges 3a-3a of the lateral member.
It is a little smaller than The spot welding position 12 is a portion where the outer plate 1a and the outer plate 1 are overlapped and joined. The outer plate 1 a is located outside the outer position 1. Therefore, a step 13 is provided at the outer position 1a by the thickness of the outer plate 1. This is commonly known as a backrest.

With such a structure, it is possible to obtain a structure in which the outer plate 1 does not buckle even under severe load conditions. That is, the distance L between the fixing points of the outer plate 1 by spot welding can be shortened to, for example, 1/2 as compared with the case where the outer plate 1 is conventionally fixed by the flange portion on the outer plate side of the frame vertical member 2. Therefore, the out-of-plane bending of the outer plates 1 and 1a and the buckling strength due to the axial force transmission load can be improved.

Further, conventionally, the webs 2b and 2 of the vertical member 2 have been used.
The overlapping portion of the outer plate 1 and the outer plate 1a between the b and the outer plate 1a (that is, near the end faces of the outer plates 1 and 1a) is not spot-welded. Therefore, when an axial force is applied from the lateral member 3, the outer plates 1, 1a in this portion (near the end face) are likely to buckle, as is well known. The end face side is more likely to buckle. But,
In the above embodiment, since the outer plates 1 and 1a of the overlapping portion are fixed to the flange surfaces 10a and 10aa of the reinforcing plate 10 fixed to the vertical member 2 by spot welding 12 and 11, buckling can be prevented. is there.

The structure of the three-dimensional joint portion of the side structure of the vehicle according to the present invention is used as a means for constructing a frame of a light-weight thin plate vehicle body structure. It is effective in preventing buckling. Further, since the connection of the outer plate to the reinforcement is performed by spot welding like other frames, there is no discomfort in appearance due to the addition of this spot welding.

The reinforcing plate 10 of the joint portion is firmly fixed to the vertical member 2 by welding 15 beforehand, and the axial force of the lateral member 3 is relatively exerted via the reinforcing plate 10 and the outer plate 1 connected thereto. The horizontal member 3 can be smoothly transmitted. Further, by connecting the reinforcing plate 10 and the outer plate 1 by spot welding 11 and 12, the fixing distance between the outer plates can be shortened, so that the buckling strength of the outer plate is greatly improved.

The reinforcing plate 10 has a flange 10b, and the height from the flanges 10a, 10aa to the bottom portion 10c is preferably matched with the height from the inside of the bottom portion 2c of the bone member 2 to the flange 2a. According to this, the reinforcing plate 10 is attached to the bone member 2
When inserted into the inside, the surfaces of the flanges 10a, 10aa and the surface of the flange 2a are at the same position, a special positioning jig can be eliminated, and welding work can be simplified.

The position of the welding 15 of the reinforcing plate 10 is determined by the web 2
This is the position facing c. Since welding is not performed at the positions of the flanges 2a and 10a, it is possible to eliminate the need for cutting the weld bead at that portion.

Since the position of the weld 15 may be close to the flange 2a, the welding work can be simplified.

The spacing between the webs 10b-10b of the reinforcing plate 10 is the same as the spacing between the webs 3b-3b of the transverse member 3.
The width of the flanges 10a, 10a is the same as the width of the flanges 3a, 3a. Therefore, the vertical member 2 and the like are prevented from being deformed, and the axial force of the horizontal member 3 is transmitted via the vertical member 2.
Can be transmitted to

Further, when the load condition is more severe, if a reinforcing plate having an appropriate thickness is added to the outer plate side of the reinforcing plate 10 in advance and then combined with the outer plate 1, the weight is not increased and further, The buckling strength can be improved.

The present invention is not limited to a railcar, but is a structure using cross-members having a cross section composed of an outer plate side flange, an inner side flange and a web connecting both flanges as a frame of an outer plate. The structure can be applied to a structure for preventing buckling of the outer plate in which the connecting portions of the members are discontinuous.

In order to apply the present invention, at least one of the vertical member 2 and the horizontal member 3 may have a hat-shaped cross section. The reinforcing plate may be fixed to the frame member having the hat-shaped cross section. Further, the joint portion is not limited to the three-dimensional joint, and may be a flat joint.

As described above, according to the embodiment of the present invention, by arranging the reinforcements at the member connecting portions in the thin plate frame structure, it is possible to provide the side structure which can endure severe load conditions. That is, 1) The reinforcing plate 10 provided in the joint forming portion of the vertical member 2 can be made as a single piece and incorporated into the frame member at the time of the component.

2) Since the reinforcing plate 10 is disposed on the extension of the lateral member, the lateral force of the lateral member is transmitted smoothly.

3) As shown in FIG. 16, the outer plate facing the central portion of the conventional joint structure is spot-welded 8 to form the vertical member 2 as shown in FIG.
And the lateral member 3, the distance between the fixed outer plates is L
Therefore, the structure could not be made smaller than that. As in the present invention, the reinforcing plate 10 is arranged and the outer plate is spot-welded 1
If the reinforcing plates 10 are connected to the reinforcing plates 10 by 1, 12, the fixing distance of the outer plate can be shortened, so that the buckling strength of the outer plate of the joint portion can be improved.

The embodiment of FIG. 11 is another embodiment of the reinforcing plate 10, in which two short C-shaped (channel-shaped) reinforcing plates 10A and 10B are used in combination, and the respective webs 10Ab and 10Bb are used. It is welded 15 and 17 to the web 2b of the vertical member 2. Flange 10Aa, 10B
a corresponds to the flanges 10aa and 10a.

The embodiment of FIG. 12 is another embodiment of the reinforcing plate 10, in which a reinforcing plate 10C that is long in the longitudinal direction of the vertical member 2 is used, and both ends in the longitudinal direction are bent to form a flange 10Cc.
I have to. The flange 10Cc is welded to the web 2b 15
doing. The flange 10Ca between the flanges 10Cc and 10Cc is welded 15 to the flange 2a. The beads of the welded portion 18 are cut and finished flat.

When the horizontal member 3 is prioritized in relation to the vertical member, the reinforcing plate 10 is installed in the space of the horizontal member 3.

[0053]

According to the present invention, by arranging a reinforcing plate at a member connecting portion in a vehicle body frame structure using a thin plate,
A side structure for a vehicle that can withstand severe load conditions can be provided.

Further, since the reinforcing plate is arranged on the extension of the other member which intersects with one of the vertical member and the horizontal member which constitute the frame member, the other member intersects smoothly, so that the transmission of the axial force of the other members is smooth. To be done.

Furthermore, since the distance between the fixing positions of the outer plate can be made shorter than in the conventional case, the buckling strength of the outer plate of the joint portion can be improved.

[Brief description of drawings]

FIG. 1 is a front view of essential parts showing a general structure of a frame of a side structure of a vehicle to which the present invention is applied.

2 is a front view of a joint structure according to an embodiment of the present invention, which is used as a joint portion of the cross frame in FIG. 1. FIG.

FIG. 3 is a sectional view taken along the line DD of FIG.

FIG. 4 is a sectional view taken along line EE of FIG.

FIG. 5 is a diagram showing a calculation model of buckling limit stress of a flat plate.

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

FIG. 7 is a perspective view of a frame vertical member to which a reinforcing plate is attached in the embodiment of FIG.

FIG. 8 is a perspective view of a lateral member combined with a space joint in the embodiment of FIG.

9 is a perspective view showing a state in which a vertical member and a horizontal member are combined in the embodiment of FIG.

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

FIG. 11 is a perspective view of a reinforcing plate according to another embodiment of the present invention.

FIG. 12 is a perspective view of a reinforcing plate according to another embodiment of the present invention.

13 is used as a joint portion of the cross frame of FIG. 1,
It is a front view which shows an example of the conventional joint structure.

14 is a perspective perspective view showing a part of the right half of FIG. 13. FIG.

FIG. 15 is a sectional view taken along line BB of FIG.

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Outer plate, 2 ... Frame vertical member, 3 ... Frame horizontal member, 4 ... Three-dimensional joint, 5, 6, 7, 8 ... Spot welding, 9 ... Vertical member blank part, 10, 17, 18 ... Reinforcing plate, 11 ... outer plate reinforcement two-layer spot welding, 12 ... outer plate reinforcement three-layer spot welding, 13 ... outer plate joint backrest, 14 ... electrode, 15 ... welding, 16 ... through hole.

Claims (11)

[Claims] 1. A vertical member and a horizontal member which form a frame member,
A joint for integrally connecting the vertical member and the horizontal member,
A thin outer plate fixed to the skeleton member, at least one of the skeleton members is a hat-shaped cross-section skeleton member having a pair of webs and a flange surface extending from each web end, In the side structure, a reinforcing plate having a flange surface that is flush with the flange surface of the frame member, in a portion surrounded by both webs of the frame member having a hat-shaped cross-sectional shape of the frame and the outer plate. And a position on a parallel line intersecting with the other member of the frame member, connected to the frame member, and a flange surface of the reinforcing plate and the outer plate are connected by welding. Side structure. 2. The side structure of a railway vehicle according to claim 1, wherein both ends of the reinforcing plate are in contact with both webs of the frame member, and both end surfaces of the reinforcing plate are connected to the web of the frame member. The side structure of the railroad car characterized by the above. 3. The side structure of the railway vehicle according to claim 1, wherein the reinforcing plate and the outer plate are connected by spot welding. 4. The railcar side structure according to claim 1, wherein the reinforcing plate has an L-shaped cross-sectional shape along the longitudinal direction of the hat-shaped frame member that is a combination of a vertical portion and a flange portion. A side structure of a railway vehicle including a portion, wherein an end surface of the vertical portion is connected to both the webs of the frame member, and the flange portion is connected to the outer plate by spot welding. 5. The side structure of a railway vehicle according to claim 1, wherein the reinforcing plate has a U-shaped base portion and both sides thereof extending in a cross-sectional shape along the longitudinal direction of the hat-shaped frame member. It is a combination of L-shaped flange parts,
Both end surfaces of the base portion are respectively coupled to the both webs of the frame member, the flange portion is parallel to the bottom surface of the base portion, and the outer plate is coupled to the flange portion by spot welding. The side structure of the characteristic railway vehicle. 6. The side structure of a railway vehicle according to claim 1, wherein the reinforcing plate has a U-shaped cross-section along the longitudinal direction of the frame member, which is a combination of a base and webs on both sides thereof. A side structure of a railcar, wherein the webs on both sides are respectively connected to both webs of the frame member, and the outer plate is connected to the base by spot welding. 7. The side structure of a railway vehicle according to claim 5, wherein a plurality of the U-shaped reinforcing plates are arranged along a longitudinal direction of the U-shaped hat-shaped cross-section frame member. The side structure of the railroad car characterized by being. 8. The railcar side structure according to claim 5 or 6, wherein when the member orthogonal to the priority member is a hat-shaped member, the spacing between both webs of the orthogonal hat-shaped member and the reinforcement. The distance between the U-shaped webs of the plate is the same, and both webs of the reinforcing plate are located on the extension lines of the flanges of the orthogonal hat members in the longitudinal direction of the orthogonal hat members. The side structure of the railroad car characterized by being present. 9. The railcar side structure according to claim 1, wherein the frame member on which the reinforcing plate is arranged is the vertical member. 10. The side structure of a railway vehicle according to claim 4, wherein the height from the flange portion of the reinforcing plate to the vertical portion is the same as the height of the web of the frame member. The side structure of a rail car. 11. A vertical member and a horizontal member which form a frame member, a joint for integrally connecting the vertical member and the horizontal member, and a thin outer plate connected to the vertical member and the horizontal member, At least the vertical member includes a frame member having a hat-shaped cross section having a pair of webs and a flange surface extending from each end of the webs, and the outer plate includes two plates, one of the two plates. The plate is in contact with the flange of the lateral member and is located below the flange, the other plate is overlaid on the outside of the one plate, and is located above the flange. In a side structure of a railway vehicle, in which a plate and the flange are spot-welded, a reinforcing plate having a flange surface that is flush with the flange surface of the vertical member is provided with both webs of the vertical member and the outer plate. Surrounded by At a position where the horizontal member is extended and at a position on the extension line of the horizontal member, the both ends of the reinforcing plate are brought into contact with both webs of the frame member,
A side structure of a railway vehicle, wherein a flange surface of the reinforcing plate and the outer plate are spot-welded.