JP2013018369A - Frame structure of rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a frame structure of a rolling stock in which the length frame and the transverse frame are stably connected with the uniform quality by reducing the number of parts and the simple frame structure.SOLUTION: The side frame structure Bs of the rolling stock that is composed by connecting the frames FMh and FMv distributed in length and breadth inside of the outside plates Pe is distributed and extended in a first direction Dh parallel in the longitudinal direction of the rolling stock excluding the openings D and W. The side frame structure Bs includes: a first frame FMh that is welding connected to the outside plate Pe; and a second frame FMvs that is welding connected to the outside plate Pe continuously distributed in a second direction Dv that is roughly perpendicular to the first direction Dh. For the second frame FMvs, a planar gusset part Pgt that extends to the first direction Dh only a prescribed length is formed as one body, and the gusset part Pgt is connected to the first frame FMh by laser welding Wl.

Description

  The present invention relates to a structure of a railway vehicle, and more particularly, to a structure of a side structure of a railway vehicle in which bones arranged vertically and horizontally are joined inside a skin.

  The structure of a railway vehicle is generally formed by joining bones arranged vertically and horizontally inside an outer plate (see, for example, Patent Documents 1, 2, and 3). In the same structure, in order to ensure smoothness by suppressing buckling and out-of-plane deformation of the outer plate due to welding distortion and load of passengers, etc., various ways of arranging and joining the bones are devised. Has been made.

  Specifically, the structure structure described in Patent Document 1 reduces the number of bones arranged vertically and horizontally, and arranges laterally or vertically oriented ribs closely on the inner surface of the outer plate surrounded by the bones, This is done by welding and welding. The structure structure described in Patent Document 2 is a joint plate called a gusset that has an effect of suppressing in-plane deformation between bones at a divided end of one bone and the other non-divided bone at the intersection of vertical and horizontal bones. Many of the joint structures connected with are used. Further, in the structure structure of another conventional example shown in FIG. 9, the arrangement is such that the crossing of the vertical and horizontal bones a and b and the division thereof are reduced, and the number or area ratio of the bones a and b with respect to the outer plate c is increased. doing.

  The structure structure described in Patent Document 1 has a small number of bones but a large number of ribs, which takes time and labor to manufacture and attach the ribs, and increases the cost and weight of the vehicle. It is disadvantageous for resource saving and energy saving. The structure structure described in Patent Document 2 has a slightly larger number of bones, and there are many connection points by joint plates due to the division at the intersections of vertical and horizontal bones, making the structure complicated and laborious to manufacture. In the structure shown in FIG. 9, the number of apparent bones is reduced by using a vertically oriented bone having a dual form. However, the number of bones is actually large, the ratio of the bone area to the outer plate is high, the cost is high, including the labor of installation, and the weight of the vehicle is also increased. Difficult to cope with energy saving.

  FIG. 10 schematically shows a structure structure proposed in Patent Document 3 in order to solve the above problem. The structure structure shown in FIG. 10 is a structure of a railway vehicle in which bones arranged vertically and horizontally inside the outer plate Pe (FIG. 11 (a)) are joined, and a plurality of transverse bones (hereinafter referred to as “lateral bones”) FMh. However, the longitudinal bone (hereinafter referred to as “longitudinal bone”) extends in the longitudinal direction Dh of the vehicle except for the opening of the window W and the entrance D in preference to the FMv, and the longitudinal direction of the vehicle Dh and the vehicle floor (not shown). Are welded and joined to the outer plate in a state of being arranged adjacent to each other in the vehicle height direction Dv perpendicular to. The longitudinal bone FMv is welded to the transverse bone FMh welded to the outer plate. As a result, the plurality of horizontal bones FMh that are welded and connected to the outer plate are further connected by the longitudinal bones FMv. The lateral bone FMh and the longitudinal bone FMv are connected via a gusset Gt.

  In FIG. 10, the longitudinal bone FMv adjacent to the opening end portion of the entrance / exit D is represented as the longitudinal bone FMvd, and the longitudinal bone FMv adjacent to the opening end portion of the window W portion is identified and identified as the longitudinal bone FMvw. In FIG. 11 and FIG. 13, the detailed structures of the portions surrounded by the circles Y and Z of the longitudinal bones FMvd and FMvw are shown, respectively.

  First, with reference to FIG. 11, the connection by the gusset Gt of the longitudinal bone FMvd and the transverse bone FMh in the longitudinal bone FMvd adjacent to the opening end of the entrance D will be described. FIG. 11A shows the gusset Gt viewed from above in the vehicle height direction Dv, and FIG. 11B shows the gusset Gt in the vehicle width direction Dw perpendicular to the vehicle height direction Dv and the vehicle longitudinal direction Dh. FIG. 11C shows a state in which the gusset Gt is viewed from the window W side in the vehicle longitudinal direction Dh direction.

  On the outer plate Pe, the transverse bone FMh and the longitudinal bone FMvd are placed so that the distal end portion of the transverse bone FMh is located below the longitudinal bone FMvd. That is, the upper surface of the transverse bone FMh facing the outer plate Pe is lower than the upper surface of the longitudinal bone FMvd. Gussets Gt provided with steps so as to cancel the difference in position between the upper surface of the horizontal bone FMh and the upper surface of the vertical bone FMvd are connected to the upper surfaces of the vertical bone FMvd and the horizontal bone FMh by plug welding Wp, respectively.

  With reference to FIG. 12, the dimensional accuracy requirements for the longitudinal bone FMvd and the gusset Gt will be described. FIG. 12 (a) shows the gusset Gt in FIG. 11 (a), and FIG. 12 (b) shows the transverse bone FMh and the longitudinal bone FMvd and the outer plate Pe in FIG. Is shown enlarged.

  As shown in FIG. 12A, the gusset Gt is provided with a predetermined step (in this example, 10 mm). In FIG. 12B, the left and right upper surfaces of the steps of the gusset Gt (FIG. 12A) are plug welded Wp in contact with the upper surface of the longitudinal bone FMvd and the upper surface of the lateral bone FMh, respectively. The longitudinal bone FMvd also has a predetermined step (in this example, 40 mm). The horizontal bone FMh also has a predetermined height (30 mm in this example). Therefore, in order to correctly join the gusset Gt to the longitudinal bone FMvd and the transverse bone FMh, it is necessary to ensure the dimensional shape accuracy of the longitudinal bone FMvd, the transverse bone FMh and the gusset Gt themselves.

  With reference to FIG. 13, the connection by the gusset Gt of the longitudinal bone FMv and the transverse bone FMh in the longitudinal bone FMvw adjacent to the opening end part of the window W is demonstrated. FIG. 13A shows the gusset Gt viewed from above in the vehicle height direction Dv, and FIG. 13B shows the gusset Gt in the vehicle width direction Dw perpendicular to the vehicle height direction Dv and the vehicle longitudinal direction Dh. FIG. 13C shows a state in which the gusset Gt is viewed in the vehicle longitudinal direction Dh direction from the doorway D side. As shown in the figure, two vertical bones FMvw arranged above and below one horizontal bone FMh located at the lower part of the window W and the horizontal bone FMh are connected to each other by a gusset Gt. Note that the upper surface of the transverse bone FMh facing the outer plate Pe is lower than the upper surface of the longitudinal bone FMvw. Gussets Gt provided with a step so as to cancel the difference in position between the upper surface of the horizontal bone FMh and the upper surface of the vertical bone FMvw are connected to the upper surfaces of the vertical bone FMvw and the horizontal bone FMh by plug welding Wp, respectively. Although the shapes of the longitudinal bones FMvw and gussets Gt are slightly different from the shapes of the longitudinal bones FMvd and gussets Gt shown in FIG. 11, the requirements for welding by plug welding Wp are basically the same.

  As described above, in the structure described in Patent Document 3, the transverse bone FMh and the longitudinal bone FMv are joined by plug welding Wp using a gusset Gt having a simple shape that is a separate body. As a result, by suppressing the number of ribs (Patent Document 1), the connection location (Patent Document 2) by the joint plate by dividing at the intersection of the vertical and horizontal bones, and the bone area ratio to the outer plate (FIG. 9), The increase in manufacturing cost and vehicle weight is prevented.

JP-A-5-262228 Japanese Patent Laid-Open No. 9-30414 Japanese Patent No. 4440832

  In the structure structure described in Patent Document 3, the joining force of plug welding is strong, and the individual shapes of the longitudinal bones FMv, the transverse bones FMh, and the gussets Gt to be welded (joined), and the state of their mutual positions, etc. According to the operator, it can be appropriately welded by devising. That is, there is an advantage that the individual variations of the longitudinal bones FMv, the transverse bones FMh, the gussets Gt, and the outer plate Pe and the state of the structure structure in the assembly site can be absorbed or adjusted by the plug welding operator.

  However, the quality of the on-site work performed by such an operator is highly dependent on the skill level and ability of the operator. If the operator changes, the quality of the plug welding will vary, the joining strength of the longitudinal bone FMv and the transverse bone FMh by the gusset Gt will vary, the strength of the structure will vary, and the strength of the vehicle structure will be impaired. In such a case, it is necessary to correct the strength of the structure after assembling the structure. Needless to say, variations in the quality of plug welding occur even if there is a difference in degree even by the same operator.

  Therefore, in view of the above-described problems, the present invention provides a structure for a railway vehicle in which a longitudinal bone and a transverse bone are stably joined with a uniform quality with a simple bone structure and a reduced number of parts. The purpose is to do.

In order to solve the above problems, the present invention is a side structure structure of a railway vehicle configured by joining bones arranged vertically and horizontally inside the outer plate,
A first bone extending in a first direction parallel to the longitudinal direction of the railway vehicle except for the opening, and welded to the outer plate;
A second bone weld-joined to the outer plate disposed continuously in a second direction generally perpendicular to the first direction;
The second bone is integrally formed with a flat gusset portion extending a predetermined length in the first direction, and the gusset portion is joined to the first bone by laser welding. It is characterized by being.

  INDUSTRIAL APPLICABILITY The present invention has the effect of reducing the number of parts and stably joining the longitudinal bone and the lateral bone with uniform quality in the side structure for a railway vehicle.

It is a front view which shows the side structure structure which concerns on embodiment of this invention. In FIG. 1, it is a figure which shows the detailed structure of the part enclosed with the circle | round | yen A of the gusset integrated type vertical bone. It is explanatory drawing of the dimensional accuracy request | requirement of the gusset part in the gusset integrated vertical bone of FIG. In FIG. 1, it is a figure which shows the detailed structure of the part enclosed by the circle | round | yen B of the gusset integrated type vertical bone. It is explanatory drawing of the laser welding position in the gusset part of the gusset integrated type vertical bone which concerns on this invention. It is a figure showing the relationship between the laser welding length in the gusset part of the gusset integrated type vertical bone which concerns on this invention, and the conventional plug welding. It is a front view which shows the modification of the side structure structure of FIG. In FIG. 7, it is a figure which shows the detailed structure of the part enclosed by the circle | round | yen C of the gusset integrated type vertical bone. It is a front view which shows an example of the conventional side structure structure. It is a front view which shows the side structure structure of patent document 3. In FIG. 10, it is a figure which shows the detailed structure of the part enclosed by the circle Y of the vertical bone. It is explanatory drawing of the dimensional accuracy request | requirement with respect to the vertical bone, gusset, and horizontal bone in FIG. In FIG. 10, it is a figure which shows the detailed structure of the part enclosed by the circle Z of the vertical bone.

  A structure of a railway vehicle according to an embodiment of the present invention will be described below with reference to FIGS. 1, 2, 3, 4, 5, 6, 7, and 8. First, FIG. 1 schematically shows a structure structure according to an embodiment of the present invention. This figure is similar to FIG. 10 described above, except that the side structure according to the embodiment of the present invention is viewed in the vehicle width direction perpendicular to the vehicle longitudinal direction Dh and the vehicle height direction Dv. ing. In the side structure BS according to the present embodiment, the longitudinal bones FMvd and gussets Gt and the longitudinal bones FMvw and gussets Gt in FIG. 10 are replaced with gusset-integrated longitudinal bones FMvsd and gusset-integrated longitudinal bones FMvsw, respectively.

  Basically, in the gusset-integrated longitudinal bone FMvsd, a predetermined number of gussets Gt are integrally formed with the conventional longitudinal bone FMv. That is, a predetermined number of gusset portions Pgtd are continuous in the vehicle longitudinal direction Dh direction so as to be separated from the entrance / exit D from the side portion of the longitudinal bone portion Pfmvd corresponding to the longitudinal bone FMv (a side surface separated from the opening end side of the entrance / exit D). Extended. On the other hand, in the gusset-integrated longitudinal bone FMvsw, one rectangular gusset portion Pgtw is continuous toward the window W side from the side portion (side surface adjacent to the window W) of the longitudinal bone portion Pfmvw corresponding to the longitudinal bone FMv. Extended. In addition, in FIG. 1, the detailed structure of the part enclosed by the circle | round | yen A and the circle | round | yen B of the gusset integrated type vertical bone FMvsd and the gusset integrated type vertical bone FMvsw is shown in FIG.2 and FIG.4, respectively.

  First, the connection between the gusset-integrated longitudinal bone FMvsd and the transverse bone FMh will be described with reference to FIG. 2A shows a state in which the gusset-integrated longitudinal bone FMvsd is viewed from above in the vehicle height direction Dv, and FIG. 2B shows the gusset portion Pgtd from above in the vehicle height direction Dv and the vehicle longitudinal direction Dh. FIG. 2C shows a state where the gusset portion Pgtd is viewed from the window W side in the vehicle longitudinal direction Dh direction.

  As shown in FIG. 2, with the lower surface of the gusset portion Pgtd in contact with the upper surface of the transverse bone FMh, laser welding Wl is applied from the upper surface of the gusset portion Pgtd to the upper surface of the lateral bone FMh to be connected. . The laser welding Wl is performed over a predetermined length in a predetermined direction in order to obtain a required bonding strength. In the example shown in FIG. 2 (b), two laser welds Wlh are parallel to the extending direction of the gusset portion Pgtd (vehicle longitudinal direction Dh), and the extending direction of the gusset-integrated longitudinal bone FMvsd (vehicle height). One laser welding Wlv is applied parallel to the direction Dv). In the present invention, the laser welding Wl is replaced with the conventional plug welding Wp. From this viewpoint, conditions such as the required length of the laser welding Wl will be described in detail later with reference to FIG. .

  As shown in FIG. 2A, the longitudinal bone portion Pfmvd has a predetermined step that is larger than the height of the transverse bone FMh. The longitudinal bone portion Pfmvd is bent at a substantially right angle in a direction close to the lateral bone FMh, and is connected to the gusset portion Pgtd in contact with the upper surface of the lateral bone FMh. Note that the longitudinal bone portion Pfmvd may have other shapes, for example, may be inclined in a direction close to the transverse bone FMh and connected to the gusset portion Pgtd.

  Next, with reference to FIG. 3, the dimensional accuracy requirement for the gusset-integrated longitudinal bone FMvsd will be described. As shown in FIG. 3A, the gusset-integrated longitudinal bone FMvsd is provided with predetermined steps over two steps. The lower surface of the gusset-integrated longitudinal bone FMvsd (the surface in contact with the inner surface of the outer plate Pe) and the lower surface of the gusset portion Pgtd (the surface in contact with the upper surface of the transverse bone FMh) have a predetermined step (30 mm in this example). Have. The horizontal bone FMh also has a predetermined height (30 mm in this example).

  Therefore, in order to correctly join the gusset portion Pgtd to the transverse bone FMh, as shown in FIG. 3B, in the gusset integrated vertical bone FMvsd, the lower surface of the gusset integrated vertical bone FMvsd and the lower surface of the gusset portion Pgtd It is only necessary to ensure the dimensional shape accuracy of the step. Further, as described above, the longitudinal bone portion Pfmvd of the gusset-integrated longitudinal bone FMvsd is bent or inclined substantially at a right angle in a direction close to the transverse bone FMh and connected to the gusset portion Pgtd. Even if there is an error in the dimensional shape of the step or the height of the horizontal bone FMh, the error can be absorbed by deformation of the vertical bone portion Pfmvd bent or inclined.

  Next, the connection between the gusset-integrated longitudinal bone FMvsw and the transverse bone FMh will be described with reference to FIG. FIG. 4A shows a state where the gusset-integrated longitudinal bone FMvsw is viewed from above in the vehicle height direction Dv, and FIG. 4B shows a state where the gusset portion Pgtw is viewed in the vehicle width direction Dw.

  As described above, the gusset-integrated longitudinal bone FMvsd includes a predetermined number of gusset portions Pgtd. Each of the predetermined number of gusset portions Pgtd extends continuously in the vehicle longitudinal direction Dh so as to be separated from the doorway D. On the other hand, the gusset-integrated longitudinal bone FMvsw includes one rectangular gusset portion Pgtw. Specifically, in the gusset-integrated longitudinal bone FMvsw, one rectangular gusset portion Pgtw continuously extends from the side portion (side surface adjacent to the window W) of the longitudinal bone portion Pfmvw toward the window W side. Exist. As shown in FIG. 4A, the gusset-integrated longitudinal bone FMvsw has a so-called hat-shaped cross section and forms a recess that opens toward the inside of the vehicle. This opening is used as a duct for accommodating cables such as electric wires.

  As shown in FIG. 4, with the lower surface of the gusset portion Pgtw being in contact with the upper surface of the transverse bone FMh, laser welding Wl is applied from the upper surface of the gusset portion Pgtw to the upper surface of the lateral bone FMh to be connected. . The laser welding Wl is performed over a predetermined length in a predetermined direction in order to obtain a required bonding strength. In the example shown in FIG. 4B, two laser welds Wlh are applied in parallel to the extending direction of the gusset portion Pgtw (vehicle longitudinal direction Dh). In the present invention, the conventional plug welding Wp is replaced with laser welding Wl. From this point of view, necessary conditions such as the length of the laser welding Wl will be described later with reference to FIG.

  Next, with reference to Fig.4 (a), the dimensional accuracy request | requirement with respect to gusset integrated type longitudinal bone FMvsw is demonstrated. The gusset-integrated longitudinal bone FMvsw is connected by laser welding in a state where the lower surface of the gusset portion Pgtw is in contact with the upper surface of the transverse bone FMh. In order to correctly join the gusset portion Pgtw to the transverse bone FMh, in the gusset-integrated longitudinal bone FMvsw, only the dimensional shape accuracy of the lower surface of the gusset portion Pgtw may be ensured.

  Next, with reference to FIG. 5, the construction location of laser welding Wl will be described. In laser welding, it is important to manage the flatness and the separation distance at the joint surface between two members to be joined (the gusset portion Pgt and the transverse bone FMh). The gusset part Pgt of the gusset-integrated longitudinal bone FMvsd according to the present invention is formed integrally with the longitudinal bone part Pfmv, and as shown in FIG. 5, after being bent from the longitudinal bone part Pfmv, Laser welding is performed in contact. In this sense, assuming that the plate thickness of the gusset-integrated longitudinal bone FMvsd is t and the curvature radius of the bent portion is 2.5 t, the flat portion of the hat-shaped top of the gusset portion Pgt is 2.5 t from the end. It is bent. For this reason, for safety reasons, it is determined that the regions within 4t or more from both ends of the flat portion at the top of the gusset portion Pgt are suitable for laser welding.

  Next, with reference to FIG. 6, the request | requirement with respect to the length of the laser welding Wl is demonstrated. FIG. 6 is a diagram showing a welding area necessary for obtaining a predetermined joint strength for each of laser welding (welding length) and conventional plug welding (cross-sectional area). From this figure, it is possible to know the laser welding length necessary to replace the plug welding. Note that the strength of laser welding is determined by the weld line length, unlike plug welding. Further, even if laser welding has the same line length, the welding strength between the gusset portion Pgt and the transverse bone FMh differs depending on the direction and location. Therefore, the laser welding length that can be read from FIG. 6 is appropriately corrected and determined based on the location and direction of laser welding.

  Next, a modified example of the side structure shown in FIG. 1 will be described with reference to FIGS. As shown in the figure, in the side structure BS 'according to this modification, the gusset-integrated longitudinal bone FMvsw is replaced with a gusset-integrated longitudinal bone FMvsw' in the side structure BS. Note that the gusset-integrated longitudinal bone FMvsw 'is configured in a shape substantially similar to the above-described gusset-integrated longitudinal bone FMvsd. However, the gusset-integrated longitudinal bone FMvsd is adjacent to the opening end of the entrance / exit D, the longitudinal bone portion Pfmvd is adjacent, and the gusset portion Pgtd extends away from the end of the opening (entrance / exit D) (towards the window W). Exist. In contrast, in the gusset-integrated longitudinal bone FMvsw ′, the longitudinal bone portion Pfmvw ′ is adjacent to the opening end portion of the window W, and the gusset portion Pgtw ′ is separated from the end portion of the opening (window W) (entrance / exit D). Extending in the direction of

  As described above, the gusset-integrated longitudinal bone FMvs (the gusset-integrated longitudinal bones FMvsd, FMvsw, and the gusset-integrated longitudinal bone FMvsd) This is also the same as FMvsw ′. That is, at the opening end, the gusset portion Pgt connects the integrally formed longitudinal bone portion Pfmv (vertical bone portions Pfmvd, Pfmvw, and Pfmvw ′) to one end of the transverse bone FMh by laser welding. ing.

  As shown in FIG. 8, in the gusset-integrated longitudinal bone FMvsw ′, as in the gusset-integrated longitudinal bone FMvsw ′, a part of the gusset portion Pgtw ′ extends from the opening end of the entrance / exit D to the window W. The transverse bone FMh extending over the lower part is connected to the longitudinal bone part Pfmvw ′ by laser welding Wlh.

  As described above, in order to join the horizontal bone and the vertical bone, the separate gusset is placed across the horizontal bone and the vertical bone at the assembly site of the side structure. Plug welded to both the horizontal and vertical bones. In the present invention, a gusset-integrated longitudinal bone in which a gusset portion and a longitudinal bone portion are integrally formed is used to laser-weld the gusset portion to a lateral bone to constitute a side structure. This eliminates the need for plug welding of the gusset to the longitudinal bone, which is essential in the past, and realizes the reduction of man-hours required for gusset creation, preparation, management, and gusset plug welding. That is, in the present invention, the gusset portion does not require a portion that is used for welding with the longitudinal bone, which is essential in the conventional gusset, thereby realizing light weight and resource saving.

  Further, as shown in the embodiment, the gusset portion may be individually extended in the longitudinal direction of the vehicle from the longitudinal bone portion corresponding to each of the transverse bones to be joined, or as shown in the modification example. Instead of corresponding to individual bones, a predetermined length may be extended in the longitudinal direction of the vehicle. In the case of the modified example, the amount of the gusset portion is larger than in the case of the embodiment, but the structural strength of the gusset-integrated longitudinal bone, that is, the side structure becomes stronger. In any case of the embodiment and the modified example, the gusset that has been separately separated conventionally is integrally formed with the longitudinal bone portion as a gusset portion continuous in the vehicle height direction. Compared to the side structure using gussets, the stronger structural strength is obtained.

  For joining the gusset portion and the transverse bone, laser welding automated by a laser welding apparatus is used instead of plug welding by a conventional manual operation of an operator. As a result, the quality of the side structure can be improved and stabilized by suppressing variations in welding quality resulting from the on-site alignment, the skill level of the worker, and the state of the worker. In addition, man-hours can be reduced by laser welding (mechanization), and resource saving and energy saving can also be realized. In the above-described embodiment and modification, an example in which the longitudinal bone portion of the gusset-integrated longitudinal bone is used close to the end portion of the opening is shown. However, when the gusset-integrated longitudinal bone FMvs is configured in the shape shown in FIG. 4 or 5, the longitudinal bone portion should be arranged at an arbitrary position on the transverse bone, not at the end of the opening. Can do.

  INDUSTRIAL APPLICABILITY The present invention can be used for manufacturing a railway vehicle structure, that is, a rail vehicle side structure in which bones arranged vertically and horizontally inside an outer plate are joined.

BS, BS 'Side structure Pe Outer plate D Entrance / exit W Window FMvsd, FMvsw, FMvsw' Gusset-integrated longitudinal bone Pfmvd, Pfmvw, Pfmvw 'Longitudinal bone part Pgtd, Pgtw, Pgtw' W Laser welding FMv, FMvd, FMvw Longitudinal bone Gt Gusset Wp Plug welding Dh Vehicle longitudinal direction Dv Vehicle height direction Dw Vehicle width direction

Claims (7)

A side structure of a railway vehicle constructed by joining bones arranged vertically and horizontally inside the outer plate,
A first bone extending in a first direction parallel to the longitudinal direction of the railway vehicle except for the opening, and welded to the outer plate;
A second bone weld-joined to the outer plate disposed continuously in a second direction generally perpendicular to the first direction;
The second bone is integrally formed with a flat gusset portion extending a predetermined length in the first direction, and the gusset portion is joined to the first bone by laser welding. Side structure structure characterized by   2. The side according to claim 1, wherein the second bone is disposed adjacent to an end of the opening, and the gusset portion extends away from the end of the opening. Structure structure.   The side structure according to claim 2, wherein the second bone is arranged adjacent to an end of the opening and an end of the first bone.   4. The side structure according to claim 3, wherein the opening is an entrance / exit of the railway vehicle.   The side structure according to claim 2, wherein the opening is a window of the railway vehicle.   4. The side structure according to claim 2, wherein the gusset portion has a partially protruding shape corresponding to the first bone. 5.   6. The side structure according to claim 1, wherein the gusset portion has an overall projecting shape regardless of the first bone. 7.