Railroad vehicle and method for producing the same

Abstract

To provide a railroad vehicle that can be efficiently reinforced at a vehicle interior side of a side window with reduced number of parts and welding man-hours while increasing appearance of a side external plate having a laterally long side window, and a method for producing the same.SOLUTION: A railroad vehicle 10 uses a stainless steel plate for a side external plate 1 of a car body ST, comprises a laterally long side window 2 for the side external plate, is provided with hat-shaped cross-sectional upper transverse bones 3, 7 vertically separated on a vehicle interior side of an upper part 1a, and hat-shaped cross-sectional lower transverse bones 4, 8 vertically separated on a vehicle interior side of a lower part 1b, and comprises a blowing part inner plate 5 that connects the upper transverse bones and the lower transverse bones in the middle of the side window in the vehicle longitudinal direction, and a vertical bone 6 joined to the vehicle interior side of the blowing part inner plate. Flange parts 31, 71 of the upper transverse bones are laser-welded to the upper parts, flange parts 41, 81 of the lower transverse bones are laser-welded to the lower parts, the blowing part inner plates are welded to top plate parts 32, 42, 72, 82 of all upper transverse bones and all lower transverse bones, and the vertical bone extends from an upper end part 521 to a lower end part 531 of the blowing part inner plate.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a railway vehicle and a manufacturing method thereof, and more particularly to a railway vehicle using stainless steel plate for the side outer panels of the car body and equipped with horizontally long side windows formed continuously in the longitudinal direction of the vehicle, and a manufacturing method thereof. [Background technology]

[0002] In recent years, express trains and the like have adopted railcars that use stainless steel plates, which are excellent in corrosion resistance and aesthetics, for the side panels of the car body and have long side windows that are continuously formed in the longitudinal direction of the car. In order to ensure the rigidity of the car body, a cross-beam reinforcement structure has been considered for such railcars, in which cross beams and vertical beams are provided on the cabin side of the side panels and the upper and lower cross beams are connected on the cabin side at the intermediate part of the long side window in the longitudinal direction of the car. A railcar equipped with this cross-beam reinforcement structure is disclosed in, for example, Patent Document 1.

[0003] That is, as shown in Figures 10 and 11, in the railway vehicle 100 of Patent Document 1, an upper cross frame 103 with a hat-shaped cross section is arranged above the cabin side of a horizontally long side window 102 formed in a side outer plate 101, and a flange portion of the upper cross frame 103 is welded to the curtain portion 101a of the side outer plate 101, and a lower cross frame 104 with a hat-shaped cross section is arranged below the cabin side of the side window 102, and a flange portion of the lower cross frame 104 is welded to the waist portion 101b of the side outer plate 101. As the wind-over reinforcement structure 105H, a wind-over section inner plate 105 formed in a flat plate shape is fixed to the upper cross frame 103 and the lower cross frame 104 at the middle part of the side window 102 in the longitudinal direction of the vehicle so as to span the vehicle compartment side, and a pair of wind-over section pillar members 106 arranged in contact with the vehicle compartment side surface of the wind-over section inner plate 105 are joined to connect a wind-over section pillar 107 with a hat-shaped cross section welded to the wind-over section 101a and a waist section pillar 108 with a hat-shaped cross section welded to the waist section 101b.

[0004] The above-mentioned sprung pillar member 106 is bent between the upper cross-bone 103 and the lower cross-bone 104 to have a hat-shaped cross section, and is bent above the upper cross-bone 103 and below the lower cross-bone 104 to have a U-shaped cross section, and is provided with an upper rib 106a and a lower rib 106b which correspond to the side walls of the U-shaped cross section. The upper rib 106a is welded to the side wall of the curtain pillar 107, and the lower rib 106b is welded to the side wall of the waist pillar 108. In addition, sprung pillar reinforcing members 109, 110 with U-shaped cross section extending in the vertical direction of the vehicle are joined to the inner plate surface of the sprung pillar member 106, straddling notched portions 106d, 106e formed at the boundary between the hat-shaped cross section and the U-shaped cross section.

[0005] The collet portion inner plate 105 is a plate material punched into a substantially H shape, with a pillar portion 105c provided between upper and lower overhanging portions 105a, 105b, with the upper overhanging portion 105a welded to the top plate portion of the upper cross frame 103 and the lower overhanging portion 105b welded to the top plate portion of the lower cross frame 104. A middle rib 106c, which corresponds to the flange portion of the hat-shaped cross section at the center of the collet portion member 106, is welded to the pillar portion 105c of the collet portion inner plate 105.

[0006] Additionally, multiple upper split cross beams 103a separated by a pair of curtain posts 107 above the upper cross beam 103 are welded to the curtain section 101a of the side panel 101, and furthermore, curtain post connecting plates 111 connecting the pair of curtain posts 107 are welded to the curtain section 101a. Additionally, multiple lower split cross beams 104b separated by a pair of waist posts 108 below the lower cross beam 104 are welded to the waist section 101b of the side panel 101, and furthermore, waist post connecting plates 112 connecting the pair of waist posts 108 are welded to the waist section 101b of the side panel 101.

[0007] In addition, the inner plate 105 of the blow-out section is provided with a welding gun relief hole YN1 for overlapping and welding the flange portion of the upper cross frame 103 to the flange portion of the curtain column 107, a welding gun relief hole YN4 for overlapping and welding the flange portion of the lower cross frame 104 to the flange portion of the waist column 108, a welding gun relief hole YN3 for welding the flange portion of the upper cross frame 103, and a welding gun relief hole YN2 for welding the flange portion of the lower cross frame 104 to the side outer plate 101. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2020-29126 A Summary of the Invention [Problem to be solved by the invention]

[0009] However, the railway vehicle 100 of the above-mentioned Patent Document 1 has the following problem. That is, among the components constituting the wind-over-coat reinforcement structure 105H, the wind-over-coat pillar member 106 is joined so as to connect a curtain pillar 107 having a hat-shaped cross section welded to the curtain portion 101a and a waist pillar 108 having a hat-shaped cross section welded to the waist portion 101b by an upper rib 106a and a lower rib 106b. Therefore, wind-over-coat pillar reinforcing members 109 and 110 that reinforce the notched portions 106d and 106e for forming the upper rib 106a and the lower rib 106b are joined to the inner plate surface of the wind-over-coat pillar member 106.

[0010] Among the components constituting the wind-over reinforcement structure 105H, the wind-over section inner plate 105 is a plate material punched into a substantially H shape with its upper and lower ends restricted by the upper rib 106a and lower rib 106b of the wind-over column member 106, and the upper protruding portion 105a is welded only to the top plate portion of the upper cross frame 103, and the lower protruding portion 105b is welded only to the top plate portion of the lower cross frame 104. Therefore, to reinforce the upper part of the vehicle where the wind-over section inner plate 105 is not present, a pair of wind-over section posts 107 and multiple upper split cross frames 103a split by sandwiching the wind-over section posts 107 are welded to the wind-over section 101a above the upper cross frame 103, and wind-over section post connecting plates 111 connecting the wind-over section posts 107 to each other are welded. In addition, in order to reinforce the lower part of the vehicle where the blow-in section inner plate 105 is not present, a pair of waist columns 108 and multiple lower split cross columns 104b separated by the waist columns 108 are welded to the waist section 101b below the lower cross frame 104, and waist column connecting plates 112 that connect the waist columns 108 to each other are welded.

[0011] Therefore, in the railway vehicle 100 of Patent Document 1 mentioned above, in addition to the wind-over section inner panel 105 and wind-over column member 106, there are a large number of parts that reinforcing the side outer panel 101 (the curtain section column 107, the waist column 108, the wind-over column reinforcing members 109, 110, the curtain section column connecting plate 111, the waist column connecting plate 112, etc.), which poses the problem of an increase in the amount of welding labor.

[0012] In addition, in the railway vehicle 100 of the above-mentioned Patent Document 1, the above-mentioned components had to be welded in the following procedure. First, the wind-over column member 106 to which the wind-over column reinforcing members 109, 110 are joined is welded to the wind-over section inner plate 105, and the upper and lower protruding parts 105a, 105b of the wind-over section inner plate 105 are welded to the top plate parts of the upper cross frame 103 and the lower cross frame 104, and the upper rib 106a and the lower rib 106b of the wind-over column member 106 are welded to the side wall parts of the curtain column 107 and the waist column 108. Next, the flange parts of the upper cross frame 103 and the lower cross frame 104 are welded to the side outer plate 101 (the curtain section 101a, the waist section 101b), and the flange parts of the curtain column 107 and the waist column 108 are welded.

[0013] Therefore, after the wind-over reinforcement structure 105H consisting of the wind-over column member 106 and the wind-over inner panel 105 is welded to the upper cross frame 103, the lower cross frame 104, the curtain column 107, and the waist column 108, it is necessary to weld each of the flange portions of the upper cross frame 103, the lower cross frame 104, the curtain column 107, and the waist column 108 to the side outer panel 101 (curtain section 101a, waist section 101b).

[0014] However, the upper cross frame 103, the lower cross frame 104, the curtain column 107, and the waist column 108 are welded to the spur column member 106 and the spur inner plate 105, so that the surface position accuracy of each flange portion is likely to decrease, and the gap between the parts becomes narrow. Therefore, it is difficult to join the flange portions of the upper cross frame 103, the lower cross frame 104, the curtain column 107, and the waist column 108, which have a reduced surface position accuracy, to the side outer plate 101 (the curtain portion 101a, the waist portion 101b) by laser welding, which requires strict equipment construction conditions, and they are joined by spot welding or arc welding, which requires relatively easy equipment construction conditions. As a result, there is a possibility that the side outer plate 101 may have indentations of spot welding or thermal distortion of arc welding, which may affect the appearance.

[0015] The present invention has been made to solve such problems, and has an object to provide a railway vehicle that can effectively reinforce the cabin side of the side window by reducing the number of parts and welding labor while improving the appearance of a side outer panel having a horizontally long side window, and a manufacturing method for such a railway vehicle. [Means for solving the problem]

[0016] In order to achieve the above object, a railway vehicle and a manufacturing method thereof according to the present invention have the following configuration. (1) A stainless steel plate is used for the side outer panel of a car body, the side outer panel is provided with a horizontally long side window formed continuously in the longitudinal direction of the car, and upper cross beams with a hat-shaped cross section are arranged in parallel with a space between them above and below the side window on the passenger compartment side of the curtain portion of the side outer panel, and lower cross beams with a hat-shaped cross section are arranged in parallel with a space between them below and above the side window on the passenger compartment side of the waist portion of the side outer panel, A railway vehicle equipped with a windscreen reinforcement block having a windscreen inner plate that connects the upper cross frame and the lower cross frame on the passenger compartment side at a vehicle longitudinal direction intermediate portion of the side window, and a vertical frame joined to the windscreen inner plate on the passenger compartment side, Each flange portion of the upper cross frame is laser welded to the roof section along the vehicle longitudinal direction, and each flange portion of the lower cross frame is laser welded to the waist section along the vehicle longitudinal direction, The inner plate of the blow-through portion is welded to each top plate portion of all of the upper cross bones and all of the lower cross bones, The vertical bone is characterized in that it extends from an upper end portion to a lower end portion of the inner plate of the channel portion.

[0017] In the present invention, the flanges of the upper cross bones are laser welded to the curtain portion along the vehicle longitudinal direction, and the flanges of the lower cross bones are laser welded to the waist portion along the vehicle longitudinal direction, so that the strength in the vehicle longitudinal direction can be increased while improving the appearance of the curtain portion and waist portion of the side panel. The upper cross bones are arranged in parallel above the side window on the passenger compartment side of the curtain portion of the side panel, spaced apart from each other in the vertical direction, and the lower cross bones are arranged below the side window on the passenger compartment side of the waist portion of the side panel, spaced apart from each other in the vertical direction. Therefore, the upper cross bones and the lower cross bones can be arranged separately from each other in the curtain portion and waist portion of the side panel, and the flanges of the upper cross bones and the flanges of the lower cross bones can be accurately abutted against the curtain portion and waist portion of the side panel. Therefore, the flanges of the upper cross bones and the flanges of the lower cross bones can be stably laser welded to the curtain portion and waist portion of the side panel, respectively.

[0018] In addition, since the inner plate of the winding section is welded to the top plate portions of all the upper cross beams and all the lower cross beams, and the vertical beams extend from the upper end to the lower end of the inner plate of the winding section, all the upper cross beams and all the lower cross beams can be connected to the passenger compartment side by the inner plate of the winding section and the vertical beams at the middle part of the side window in the longitudinal direction of the vehicle, thereby increasing the strength in the vertical direction of the vehicle. This reduces the number of parts that reinforce the side outer plate that forms the horizontally long side window, and therefore the welding man-hours.

[0019] Therefore, according to the present invention, a railway vehicle can be provided that can effectively reinforce the cabin side of the side window while improving the appearance of the side outer panel having a long side window and reducing the number of parts and welding labor.

[0020] (2) In the case of a railway vehicle as described in (1), The vertical bone is formed in a hat-shaped cross section, and is provided with flange protrusions protruding from outer edges of flange portions in the vehicle longitudinal direction at the position of the upper horizontal bone adjacent to the upper end of the side window and at the position of the lower horizontal bone adjacent to the lower end of the side window, the flange protrusions being spaced apart from each other; The inner panel of the wind-over section includes a wind-over column section formed in the region of the side window, an upper wind-over extension section formed wider than the wind-over column section in the region of the curtain section, and a lower wind-over extension section formed wider than the wind-over column section in the region of the waist section, The upper and lower extended portions are characterized in that they are extended in the vehicle longitudinal direction more than the flange protruding portion.

[0021] In the present invention, the vertical bones are formed with a hat-shaped cross section and are provided with flange protrusions that protrude from the outer edge of the flange portion in the longitudinal direction of the vehicle and are spaced apart from each other at the position of the upper cross bone adjacent to the upper end of the side window and at the position of the lower cross bone adjacent to the lower end of the side window, and the blown-up portion inner panel is provided with a blown-up column portion formed in the side window area, an upper blown-up extension portion formed wider than the blown-up column portion in the curtain portion area, and a lower blown-up extension portion formed wider than the blown-up column portion in the waist portion area, and since the upper blown-up extension portion and the lower blown-up extension portion are extended in the longitudinal direction of the vehicle more than the flange protrusions, the upper corners of the vehicle where the blown-up column portion and the upper blown-up extension portion intersect, and the lower corners of the vehicle where the blown-up column portion and the lower blown-up extension portion intersect can be reinforced by the upper blown-up extension portion and the flange protrusion, and the lower blown-up extension portion and the flange protrusion, each in a double-layered state. This alleviates stress concentration at the upper and lower corners, enabling the side outer panel to be reinforced more effectively on the passenger compartment side of the side window.

[0022] In addition, in each region of the curtain portion and waist portion of the side exterior panel, the welding positions for welding the upper and lower extension portions of the approach section inner panel to the top plate portions of the upper and lower cross bones can be distributed over a wider range. This increases the connection strength between the upper and lower cross bones and the approach section inner panel, while dispersing the welding heat generated when welding the approach section inner panel to the upper and lower cross bones over a wider range. As a result, the side exterior panel can be more effectively reinforced on the cabin side of the side window, while further reducing the thermal effect on the side exterior panel, thereby improving the appearance of the side exterior panel.

[0023] (3) In the case of railway vehicles described in (2), At least one of the corners at the upper part of the vehicle where the blown-up column portion and the upper blown-up extension portion intersect, and the corners at the lower part of the vehicle where the blown-up column portion and the lower blown-up extension portion intersect, has a corner reinforcement plate formed in an approximately L-shape in a planar view, which is joined to the flange portion on the side window side of the vertical bone and to the passenger compartment side of the flange protrusion.

[0024] In the present invention, at least one of the corners at the upper part of the vehicle where the upper extension part intersects with the upper extension part, and the corners at the lower part of the vehicle where the lower extension part intersects with the upper extension part, is joined to the flange part on the side window side of the vertical frame and the passenger compartment side of the flange protrusion, and therefore the corners where stress tends to concentrate can be reinforced more firmly by the triple-layered state of the inner plate of the vertical frame, the flange part on the side window side of the vertical frame and the flange protrusion, and the corner reinforcement plate. In addition, since the corner reinforcement plate is joined to the flange part on the side window side of the vertical frame and the passenger compartment side of the flange protrusion, the corner reinforcement plate can be added later as necessary. Therefore, the corner reinforcement effect can be enhanced easily and flexibly.

[0025] (4) In a railway vehicle according to any one of (1) to (3), The inner plate of the blow-out portion is laser-welded to each top plate portion of the upper cross bone and the lower cross bone in the vertical direction of the vehicle at a position different from the vertical bone.

[0026] In the present invention, the wind-come portion inner plate is laser welded to the top plate portions of the upper and lower cross bones in the vertical direction of the vehicle at a position different from the vertical bones, so that the wind-come portion inner plate and the top plate portions of the upper and lower cross bones can be stably laser welded in a two-ply state, and poor penetration of the laser weld can be easily avoided. Also, since the wind-come portion inner plate is laser welded to each top plate portion in the vertical direction of the vehicle, the wind-come portion inner plate and the upper and lower cross bones can be welded to more points at positions adjacent to the vertical bones, and the connection strength between the wind-come portion inner plate and the vertical bones to the upper and lower cross bones can be increased. Therefore, the side outer plate on which the horizontally long side window is formed can be more effectively reinforced on the passenger compartment side of the side window.

[0027] (5) A method for manufacturing a railway vehicle according to any one of (1) to (4), a side panel reinforcement block forming process in which the side panel and the flange portions of the upper cross frame and the lower cross frame are laser-welded to form a side panel reinforcement block; a blow-over reinforcement block forming step of joining the blow-over portion inner plate and the vertical frame to form the blow-over reinforcement block; a side structure block forming process of welding the top plate portions of the upper cross beam and the lower cross beam of the side skin panel reinforcement block to the blow-over portion inner plate of the blow-over reinforcement block to form a side structure block; The present invention is characterized in that it is provided with:

[0028] In the present invention, the side panel reinforcement block forming process is provided in which the side panel and the flanges of the upper and lower cross beams are laser-welded to form the side panel reinforcement blocks, thereby improving the appearance of the side panel and the waist portion of the side panel and increasing the strength in the longitudinal direction of the vehicle. The upper cross beams are arranged in parallel on the vehicle interior side of the side panel above the side window and spaced apart from each other vertically, and the lower cross beams are arranged in parallel on the vehicle interior side of the side panel below the side window and spaced apart from each other vertically, so that the upper cross beams and the lower cross beams can be arranged separately from each other with respect to the side panel and the waist portion, and the movement space of the laser beam during laser welding can be linearly secured. Therefore, the flanges of the upper cross beams and the flanges of the lower cross beams can be quickly welded to the side panel and the waist portion of the side panel. As a result, the welding man-hours can be reduced.

[0029] In addition, since the method includes a step of forming a side panel reinforcement block by joining the side panel inner plate and the vertical ribs, the side panel reinforcement block can be formed in advance by joining the side panel inner plate and the vertical ribs, separately from the side panel reinforcement block forming step of forming a side panel reinforcement block by laser welding the side panel and the flanges of the upper and lower ribs. Therefore, the side panel reinforcement block in which the side panel inner plate and the vertical ribs are joined can be formed with a simple structure, and the number of parts can be reduced, and the labor hours for welding and the like can be reduced accordingly. Furthermore, the side panel and the flanges of the upper and lower ribs can be laser welded before welding the side panel inner plate to the upper and lower ribs. Therefore, it is not necessary to correct the upper and lower ribs that are deformed by welding the side panel inner plate before laser welding. Therefore, the labor hours for correction such as correction can be reduced, and at the same time, the welding quality in the laser welding is improved, and the strength in the vehicle longitudinal direction can be increased while improving the appearance of the curtain portion and the waist portion of the side panel.

[0030] In addition, since the method includes a side structure block forming process for forming a side structure block by welding the top plate portions of the upper and lower cross bones of the side skin reinforcement block to the inner plate of the side skin reinforcement block, the side structure block can be formed by welding the top plate portions of the upper and lower cross bones of the side skin reinforcement block, the rigidity of which has already been increased by laser welding the flange portions of the side skin plate and the upper and lower cross bones, to the inner plate of the side skin reinforcement block. This makes it possible to significantly reduce deformation and thermal distortion that occur in the side skin plate when welding the top plate portions of the upper and lower cross bones to the inner plate of the side skin reinforcement block.

[0031] Therefore, it is possible to provide a manufacturing method for a railway vehicle that can effectively reinforce the cabin side of the side window while improving the appearance of the side outer panel having a long side window and reducing the number of parts and welding labor. Effect of the Invention

[0032] According to the present invention, it is possible to provide a railway vehicle and a manufacturing method for such a railway vehicle that can effectively reinforce the cabin side of the side window while improving the appearance of a side outer panel having a horizontally long side window and reducing the number of parts and welding labor. [Brief description of the drawings]

[0033] [Figure 1] 1 is a schematic side view of a railway vehicle according to one embodiment of the present invention. FIG. [Diagram 2] 2 is a partial side view of part A of the side structure shown in FIG. 1, as viewed from inside the vehicle (from the vehicle compartment side). [Diagram 3] 3A is a cross-sectional view of the side structure shown in FIG. 2, (A) is a cross-sectional view taken along line BB, (B) is a cross-sectional view taken along line CC, and (C) is a cross-sectional view taken along line DD. [Figure 4] FIG. 3 is a view taken along the arrow E shown in FIG. 2. [Diagram 5] FIG. 2 is a flowchart illustrating a method for manufacturing the railway vehicle shown in FIG. [Figure 6] 6 is a perspective view of a portion F shown in FIG. 2, and is an explanatory diagram of a side panel reinforcing block forming step shown in FIG. 5. FIG. [Figure 7]5. FIG. 6 is a side view of the blown-in reinforcement block shown in FIG. 2 as seen from inside the vehicle (from the vehicle compartment side), and is an explanatory diagram of the blown-in reinforcement block forming step shown in FIG. [Figure 8] 6 is a perspective view of a portion G shown in FIG. 2, and is an explanatory diagram of a side structure block forming step shown in FIG. 5. [Figure 9] 2 and is an explanatory diagram of a modified example of the side structure block forming step shown in FIG. 5. FIG. [Figure 10] FIG. 1 is a partial side view of a side structure of a railway vehicle described in Patent Document 1, as viewed from inside the vehicle (from the passenger compartment side). [Figure 11] FIG. 11 is a cross-sectional view of the HH shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0034] <Configuration of this railway vehicle> Next, a railway vehicle according to an embodiment of the present invention will be described in detail with reference to the drawings.

[0035] FIG. 1 shows a schematic side view of a railway vehicle according to one embodiment of the present invention. As shown in FIG. 1, the railway vehicle 10 of this embodiment uses a stainless steel plate SK as a side outer plate 1 of the car body ST, and is provided with a horizontally long side window 2 formed continuously in the car longitudinal direction on the side outer plate 1. The stainless steel plate SK is preferably an austenitic stainless steel plate that is high in strength and can be made lightweight, and is formed with a plate thickness of about 2 mm. The car body ST is provided with an underframe DW supported by a bogie DS running on a rail RL, a side structure GK rising upward from both ends of the underframe DW in the car width direction, an end structure TK rising upward from both ends of the underframe DW in the car longitudinal direction, and a roof structure YK connected to the upper ends of the side structure GK and the end structure TK. The side structure GK has a side door GT for boarding and alighting formed at a position near the end structure TK. In FIG. 1, there is one side door GT, but there may be more than one.

[0036] The side structure GK is divided into a plurality of side structure blocks GK1, GK2, and GK3 in the longitudinal direction of the vehicle, and the side structure blocks GK1, GK2, and GK3 are joined at boundaries (not shown). A side outer plate 1 arranged on the outer side of the side structure GK is formed with a horizontally long side window 2 formed continuously in the longitudinal direction of the vehicle. The side window 2 is formed, for example, in a horizontally long, approximately rectangular shape between one end structure TK and the side door GT. The side outer plate 1 includes a curtain portion 1a located above the side window 2 in the vehicle and a waist portion 1b located below the side window 2 in the vehicle. The side structure GK includes a plurality of blown-in reinforcement blocks 5H that connect the curtain portion 1a and the waist portion 1b on the vehicle interior side at the intermediate portion of the side window 2 in the longitudinal direction of the vehicle. The blown-in reinforcement block 5H will be described in detail later.

[0037] 2 shows a partial side view of the A portion of the side structure shown in FIG. 1 as seen from inside the vehicle (cabin side). FIG. 3 shows cross-sectional views of the side structure shown in FIG. 2, where (A) shows a BB cross-sectional view, (B) shows a CC cross-sectional view, and (C) shows a DD cross-sectional view. FIG. 4 shows a view seen from an arrow E shown in FIG. 2. As shown in FIGS. 2 to 4, the side structure GK has upper cross beams 3 and 7 with hat-shaped cross sections arranged in parallel on the cabin side of the side outer plate 1 above the vehicle above the side window 2, and lower cross beams 4 and 8 with hat-shaped cross sections arranged in parallel on the cabin side of the side outer plate 1 below the side window 2, and spaced apart from each other. The upper cross beams 3 and 7 and the lower cross beams 4 and 8 are formed to have substantially the same length as the length of each side structure block GK1, GK2, and GK3 in the vehicle longitudinal direction, and are arranged parallel to each other. The upper cross beams 3, 7 and the lower cross beams 4, 8 are formed, for example, by bending a steel plate (for example, a stainless steel plate) having a thickness of about 1 to 3 mm into a hat-shaped cross section of approximately the same height.

[0038] The upper cross beams 3, 7 include an upper cross beam 3 arranged adjacent to the upper end 21 of the side window 2, and other upper cross beams 7 (7a, 7b) arranged in parallel above the upper cross beam 3, with the uppermost cross beam 7b arranged adjacent to the upper end of the side outer panel 1 (curtain portion 1a). The lower cross beams 4, 8 include a lower cross beam 4 arranged adjacent to the lower end 22 of the side window 2, and other lower cross beams 8, 8, 8 arranged in parallel below the lower cross beam 4, with the lowermost lower cross beam 8 arranged adjacent to the lower end of the side outer panel 1 (waist portion 1b).

[0039] The side structure GK also includes a plurality of wind-up reinforcement blocks 5H, each of which has a wind-up inner plate 5 that connects the upper cross beams 3, 7 and the lower cross beams 4, 8 on the vehicle interior side at the vehicle longitudinal intermediate portion of the side window 2, and a vertical beam 6 that is joined to the vehicle interior side of the wind-up inner plate 5. The wind-up inner plate 5 is formed in a flat plate shape, for example, from an integral steel plate (for example, a stainless steel plate) with a plate thickness of about 1 to 3 mm. Here, a pair of vertical beams 6, 6 spaced apart in the vehicle longitudinal direction are arranged parallel to the vehicle vertical direction. The pair of vertical beams 6, 6 are formed symmetrically with respect to a wind-up center line 5CL that extends in the vehicle vertical direction at the vehicle longitudinal center of the wind-up inner plate 5.

[0040] In addition, the flanges 31, 71 of the upper cross beams 3, 7 are laser welded to the curtain portion 1a along the vehicle longitudinal direction, and the flanges 41, 81 of the lower cross beams 4, 8 are laser welded to the waist portion 1b along the vehicle longitudinal direction. In this laser welding, the flanges 31, 41, 71, 81 of the upper cross beams 3, 7 and the lower cross beams 4, 8 are continuously irradiated with a laser beam RB from the vehicle interior side to lap weld the flanges 31, 41, 71, 81 to the vehicle interior side portion of the side outer plate 1 (see FIG. 6). Therefore, the weld beads (front beads) RY of the laser welding are visible on the flanges 31, 41, 71, 81, but the back beads of the laser welding are not visible on the vehicle exterior side of the side outer plate 1. Therefore, the strength in the vehicle longitudinal direction can be increased while improving the appearance of the curtain portion 1a and the waist portion 1b of the side outer plate 1.

[0041] The upper cross beams 3, 7 are arranged in parallel above the side window 2 on the cabin side of the curtain portion 1a of the side panel 1, and the lower cross beams 4, 8 are arranged in parallel below the side window 2 on the cabin side of the waist portion 1b of the side panel 1, so that the upper cross beams 3, 7 and the lower cross beams 4, 8 can be arranged separately from each other with respect to the curtain portion 1a and waist portion 1b of the side panel 1. Therefore, the flange portions 31, 71 of the upper cross beams 3, 7 and the flange portions 41, 81 of the lower cross beams 4, 8 can be precisely abutted against the curtain portion 1a and waist portion 1b of the side panel 1. As a result, the flange portions 31, 71 of the upper cross beams 3, 7 and the flange portions 41, 81 of the lower cross beams 4, 8 can be laser welded to the curtain portion 1a and waist portion 1b of the side panel 1 with stable quality.

[0042] The wind-commencement inner plate 5 is welded (for example, laser welded) to the top plate portions 32, 42, 72, 82 of all the upper cross beams 3, 7 and all the lower cross beams 4, 8, and the vertical beams 6 are extended from the upper end portion 521 to the lower end portion 531 of the wind-commencement inner plate 5. The flange portion 61 of the vertical beam 6 is continuously joined (for example, spot welded) to the wind-commencement inner plate 5 at a predetermined interval from the upper end portion 521 to the lower end portion 531. Therefore, at the vehicle longitudinal direction intermediate portion of the side window 2, all the upper cross beams 3, 7 and all the lower cross beams 4, 8 can be connected on the vehicle interior side by the wind-commencement inner plate 5 and the vertical beams 6, and the strength in the vehicle vertical direction can be increased. This reduces the number of parts that reinforce the side outer plate 1 that forms the horizontally long side window 2, and accordingly reduces the welding man-hours.

[0043] Therefore, according to the present railway vehicle 10, it is possible to provide a railway vehicle 10 that can effectively reinforce the cabin side of the side window 2 while improving the appearance of the side outer panel 1 having the horizontally long side window 2 and reducing the number of parts and welding labor.

[0044] Furthermore, in the present railway vehicle 10, as shown in Figures 2 to 4, the vertical frame 6 is formed with a hat-shaped cross section, and is provided with flange protrusions 62 that protrude from the outer edge of the flange portion 61 in the longitudinal direction of the vehicle and are spaced apart from each other at the position of the upper cross frame 3 adjacent to the upper end 21 of the side window 2, and at the position of the lower cross frame 4 adjacent to the lower end 22 of the side window 2, and the blown-up portion inner panel 5 is provided with a blown-up column portion 51 formed in the area of ​​the side window 2, an upper blown-up extension portion 52 formed wider than the blown-up column portion 51 in the area of ​​the curtain portion 1a, and a lower blown-up extension portion 53 formed wider than the blown-up column portion 51 in the area of ​​the waist portion 1b, and it is preferable that the upper blown-up extension portion 52 and the lower blown-up extension portion 53 are extended in the longitudinal direction of the vehicle greater than the flange protrusions 62.

[0045] In this case, the corner SM at the upper part of the vehicle where the upper column portion 51 and the upper extended portion 52 intersect, and the corner SM at the lower part of the vehicle where the upper column portion 51 and the lower extended portion 53 intersect can be reinforced by the upper extended portion 52 and the flange protrusion 62, and the lower extended portion 53 and the flange protrusion 62, which are overlapped in two pieces. Therefore, stress concentration at the upper and lower corners SM can be alleviated, and the side outer panel 1 can be reinforced more effectively on the passenger compartment side of the side window 2.

[0046] The vertical bones 6 are formed by bending a steel plate (e.g., stainless steel plate) having a thickness of about 1 to 3 mm into a hat-shaped cross section of approximately the same height. In the pair of vertical bones 6, 6, the flange protrusions 62 are not formed on the flange parts 61 located close to each other, but are formed so as to protrude in opposite directions from the flange parts 61 located apart from each other. The flange protrusions 62 have an outer edge formed in an arc shape on the side window 2 side. The outer edges of the upper and lower corners SM where the blow-over column part 51 intersects with the upper blow-over extension part 52 and the lower blow-over extension part 53 are formed in the same shape as the arc-shaped outer edge of the flange protrusions 62. The outer edge of the blow-over column part 51 in the vehicle longitudinal direction is formed so as to coincide with the outer edges of the flange parts 61 located apart from each other on the vertical bones 6.

[0047] Moreover, the upper and lower extended portions 52 and 53 are greatly extended in the vehicle longitudinal direction from the flange protruding portion 62 in the entire area of ​​the curtain portion 1a and the entire area of ​​the waist portion 1b, and are formed with approximately the same width. Therefore, in each area of ​​the curtain portion 1a and the waist portion 1b of the side outer plate 1, the welding positions for welding the upper and lower extended portions 52 and 53 of the extended portion inner plate 5 to the top plate portions 32, 42, 72, 82 of the upper cross beams 3, 7 and the lower cross beams 4, 8 can be distributed over a wider range.

[0048] Specifically, the upper blown extension portion 52 is welded to each top plate portion 72 (72a, 72b) of two upper cross bones 7 (7a, 7b) at eight positions adjacent to each flange portion 61 of a pair of vertical bones 6, 6 and at four positions adjacent to the outer edge portion of the upper blown extension portion 52 in the vehicle longitudinal direction. Also, the upper blown extension portion 52 is welded to a top plate portion 32 of one upper cross bone 3 at two positions adjacent to each flange portion 61 of a pair of vertical bones 6, 6 and at two positions adjacent to the outer edge portion of the upper blown extension portion 52 in the vehicle longitudinal direction. The above welding positions are spaced apart at approximately the same distance from each other.

[0049] The lower extension portion 53 is welded to each top plate portion 82 of the three lower cross bones 8 at 12 positions adjacent to each flange portion 61 of the pair of vertical bones 6, 6 and at six positions adjacent to the outer edge portion of the lower extension portion 53 in the vehicle longitudinal direction. The lower extension portion 53 is welded to the top plate portion 42 of one lower cross bone 4 at two positions adjacent to each flange portion 61 of the pair of vertical bones 6, 6 and at two positions adjacent to the outer edge portion of the lower extension portion 53 in the vehicle longitudinal direction. The above welding positions are spaced apart at approximately the same distance from each other.

[0050] Therefore, it is possible to disperse the welding heat over a wider range when welding the upper cross beams 3, 7 and the lower cross beams 4, 8 to the collet portion inner plate 5 while increasing the connection strength between the upper cross beams 3, 7 and the lower cross beams 4, 8. As a result, it is possible to more effectively reinforce the side outer plate 1 on the cabin side of the side window 2 while further reducing the thermal effect on the side outer plate 1, thereby improving the appearance of the side outer plate 1.

[0051] 2 to 4, in the present railway vehicle 10, it is preferable that at least one of the corners SM at the upper part of the vehicle where the upper column portion 51 and the upper extended portion 52 intersect and the corners SM at the lower part of the vehicle where the upper column portion 51 and the lower extended portion 53 intersect has a corner reinforcing plate 63 formed in a substantially L-shape in a plan view joined to the passenger compartment side of the flange portion 61 and the flange protruding portion 62 on the side window 2 side of the vertical frame 6. Note that the corner reinforcing plate 63 may be provided at a location requiring reinforcement among the four upper and lower corners SM where the upper extended portion 52 and the lower extended portion 53 intersect with the upper column portion 51.

[0052] In this case, the corners SM where stress is likely to concentrate can be reinforced more firmly by the triple-layered arrangement of the flanges 61 and flange protrusions 62 of the vertical frame 6 on the side window 2 side, and the corner reinforcing plate 63. The corner reinforcing plate 63 is joined to the passenger compartment side of the flanges 61 and flange protrusions 62 on the side window 2 side of the vertical frame 6, so that the corner reinforcing plate 63 can be added later as necessary. This allows the corners SM to be reinforced easily and flexibly. Specifically, the triple-layered arrangement of the flanges 61 and flange protrusions 62 of the vertical frame 6 on the side window 2 side, and the corner reinforcing plate 63 are spot welded, and the triple-layered arrangement of the flanges 61 and corner reinforcing plate 63 of the vertical frame 6 are plug-welded or ring-welded to the top plate 42 of the lower horizontal frame 4 (or the top plate 32 of the upper horizontal frame 3).

[0053] In addition, in the present railway vehicle 10, as shown in FIG. 2, it is preferable that the winding section inner plate 5 is laser welded along the vertical direction of the vehicle to each of the top plate portions 32, 42, 72, 82 of the upper cross beams 3, 7 and the lower cross beams 4, 8 at a position different from the vertical beam 6.

[0054] In this case, the inner plate 5 of the wind-come portion and the top plate portions 32, 42, 72, 82 of the upper cross frame 3, 7 and the lower cross frame 4, 8 can be stably laser-welded in a two-ply state, and poor penetration of the laser welding can be easily avoided. In addition, the inner plate 5 of the wind-come portion is laser-welded to the top plate portions 32, 42, 72, 82 along the vehicle up-down direction, so that the inner plate 5 of the wind-come portion and the upper cross frame 3, 7 and the lower cross frame 4, 8 can be welded at more points at positions adjacent to the vertical frame 6, and the connection strength between the inner plate 5 of the wind-come portion and the vertical frame 6 with respect to the upper cross frame 3, 7 and the lower cross frame 4, 8 can be increased. Therefore, the side outer plate 1 on which the horizontally long side window 2 is formed can be reinforced more effectively on the passenger compartment side of the side window 2. In addition, it is preferable that the flange protruding portion 62 protrudes from the flange tip portion of the flange portion 61 on the side window 2 side of the vertical frame 6 in the direction away from the wind-come center line CL by a length longer than the overall width dimension of the vertical frame 6. In addition, it is preferable that the tip of the flange protrusion 62 has a width dimension in the vertical direction of the vehicle that is more than 60% of the width dimension (dimension in the vertical direction of the vehicle) of the top plate portion 32, 42 of the upper cross frame 3 or lower cross frame 4 to be joined.

[0055] <Manufacturing method of this railway vehicle> Next, the manufacturing method of the present railway vehicle will be described in detail with reference to the drawings. Fig. 5 shows a flow chart showing the manufacturing method of the railway vehicle shown in Fig. 1. Fig. 6 is a perspective view of part F shown in Fig. 2, and shows an explanatory diagram of the side shell reinforcement block forming process shown in Fig. 5. Fig. 7 is a side view of the blown-in reinforcement block shown in Fig. 2 as seen from the inside of the vehicle (cabin side), and shows an explanatory diagram of the blown-in reinforcement block forming process shown in Fig. 5. Fig. 8 is a perspective view of part G shown in Fig. 2, and shows an explanatory diagram of the side structure block forming process shown in Fig. 5. Fig. 9 is a perspective view of part G shown in Fig. 2, and shows an explanatory diagram of a modified example of the side structure block forming process shown in Fig. 5.

[0056] As shown in Figures 2 to 9, the manufacturing method for the railway vehicle 10 includes a side panel reinforcement block forming process S1 in which the side panel 1 is laser-welded to the flange portions 31, 41, 71, 81 of the upper cross beams 3, 7 and the lower cross beams 4, 8 to form a side panel reinforcement block 1H, a side panel reinforcement block forming process S2 in which the side panel reinforcement block 5H is formed by joining the side panel 5 to the vertical beam 6, and a side panel reinforcement block forming process S3 in which the top panel portions 32, 42, 72, 82 of the upper cross beams 3, 7 and the lower cross beams 4, 8 of the side panel reinforcement block 1H are welded to the side panel reinforcement block 5H to form side panel reinforcement blocks GK1, GK2, GK3.

[0057] 2 to 6, the manufacturing method for the present railway vehicle 10 includes a side panel reinforcement block forming process S1 in which the side panel 1 is laser-welded to the flange portions 31, 41, 71, 81 of the upper cross beams 3, 7 and the lower cross beams 4, 8 to form the side panel reinforcement block 1H, thereby improving the appearance of the curtain portion 1a and the waist portion 1b of the side panel 1 and increasing the strength in the longitudinal direction of the vehicle. Also, the number of welding steps can be reduced.

[0058] That is, the laser beam RB is continuously irradiated from the passenger compartment side to lap weld the flange portions 31, 41, 71, 81 and the passenger compartment side portions of the side outer plate 1, so that laser weld beads (front beads) RY are formed between the flange portions 31, 41, 71, 81 and the passenger compartment side portions of the side outer plate 1, and the laser weld back beads are not visible on the outer side of the side outer plate 1. Therefore, the strength in the longitudinal direction of the vehicle can be increased while improving the appearance of the curtain portion 1a and the waist portion 1b of the side outer plate 1.

[0059] In addition, the upper cross beams 3, 7 (7a, 7b) are arranged in parallel above the side window 2 on the vehicle interior side of the side outer panel 1 with a vertical gap therebetween, and the lower cross beams 4, 8 are arranged in parallel below the side window 2 on the vehicle interior side of the side outer panel 1 with a vertical gap therebetween, so that the upper cross beams 3, 7 and the lower cross beams 4, 8 can be arranged separately from each other with respect to the curtain section 1a and the waist section 1b, and the movement space of the laser beam RB during laser welding can be linearly secured. Therefore, the flanges 31, 71 of the upper cross beams 3, 7 and the flanges 41, 81 of the lower cross beams 4, 8 can be quickly welded to the curtain section 1a and the waist section 1b of the side outer panel 1. This can also reduce the number of welding steps.

[0060] 2 to 5 and 7, the method includes a side panel reinforcement block forming step S2 in which the side panel reinforcement block 5H is formed by joining the side panel 5 and the vertical frame 6, and therefore the side panel reinforcement block 5H can be formed in advance by joining the side panel 5 and the vertical frame 6, separate from the side panel reinforcement block forming step S1 in which the side panel 1 and the flanges 31, 41, 71, 81 of the upper horizontal frame 3, 7 and the lower horizontal frame 4, 8 are laser-welded to form the side panel reinforcement block 1H. Therefore, the side panel reinforcement block 5H in which the side panel 5 and the vertical frame 6 are joined can be formed with a simple structure, and the number of parts can be reduced, and the labor hours for welding and the like can be reduced accordingly.

[0061] In addition, before welding the wind-come portion inner plate 5 to the top plate portions 32, 42, 72, 82 of the upper cross frame 3, 7 and the lower cross frame 4, 8, the side outer plate 1 and the flange portions 31, 41, 71, 81 of the upper cross frame 3, 7 and the lower cross frame 4, 8 can be laser-welded. Therefore, there is no need to correct distortion or deformation of the upper cross frame 3, 7 and the lower cross frame 4, 8 that may occur due to welding the wind-come portion inner plate 5 before laser welding. This reduces the number of correction steps such as correction, while improving the welding quality in laser welding, thereby improving the appearance of the curtain portion 1a and the waist portion 1b of the side outer plate 1 and increasing the strength in the longitudinal direction of the vehicle.

[0062] In addition, as shown in Figures 2 to 5, 8 and 9, a side structure block formation process S3 is provided in which the top plate portions 32, 42, 72, 82 of the upper cross beams 3, 7 and lower cross beams 4, 8 of the side skin panel reinforcement block 1H are welded to the inner plate 5 of the side skin panel reinforcement block 5H to form the side structure blocks GK1, GK2, GK3.Therefore, the top plate portions 32, 42, 72, 82 of the upper cross beams 3, 7 and lower cross beams 4, 8 of the side skin panel reinforcement block 1H, which have already been laser-welded to the side skin panel 1 and the flange portions 31, 41, 71, 81 of the upper cross beams 3, 7 and lower cross beams 4, 8 to increase rigidity, can be welded to the inner plate 5 of the side skin panel reinforcement block 5H. Therefore, deformation and thermal strain occurring in the side outer plate 1 when the top plate portions 32, 42, 72, 82 of the upper cross beams 3, 7 and the lower cross beams 4, 8 are welded to the inner plate 5 of the wind-mounted portion can be significantly reduced.

[0063] Therefore, a manufacturing method for a railway vehicle 10 can be provided that can effectively reinforce the cabin side of the side window 2 while improving the appearance of the side outer panel 1 having a horizontally long side window 2 by reducing the number of parts and welding labor.

[0064] <Modification> Needless to say, the present railway vehicle 10 can be modified in various ways without departing from the gist of the present invention. For example, in the present railway vehicle 10, a pair of vertical bones 6, 6 spaced apart in the vehicle longitudinal direction are arranged parallel to the vehicle vertical direction. In the pair of vertical bones 6, the flange protruding portions 62 are formed so as to protrude in opposite directions from flange portions 61 located at positions spaced apart from each other. However, it is not necessary to be limited to a pair of vertical bones 6, 6. For example, a single vertical bone 6 may be used. In this case, the flange protruding portions 62 are formed so as to protrude in opposite directions from the left and right flange portions 61.

[0065] In addition, in the present railway vehicle 10, as shown in Figs. 2 to 4, the vertical frame 6 is formed in a hat-shaped cross section, and is provided with flange protrusions 62 that protrude from the outer edge of the flange portion 61 in the vehicle longitudinal direction spaced apart from each other at the position of the upper cross frame 3 adjacent to the upper end 21 of the side window 2 and at the position of the lower cross frame 4 adjacent to the lower end 22 of the side window 2. The flange protrusions 62 are formed so as to protrude integrally from the outer edge of the flange portion 61 in the vehicle longitudinal direction spaced apart from each other (see Figs. 2 to 4), but are not necessarily formed integrally from the outer edge of the flange portion 61. For example, as shown in Fig. 9, the flange protrusions 62B may be formed so as to protrude from the outer edge of another flange portion 61B that is joined to the passenger compartment side of the flange portion 61 formed with a constant flange width in the vehicle longitudinal direction spaced apart from each other via a selvedge portion 621B. In this case, the inner plate 5 of the blow-in section and the flange portion 61 on the side window 2 side of the vertical frame 6 and the other flange portion 61B are spot welded in a three-layer overlapping state, and the inner plate 5 of the blow-in section and the flange protrusion portion 62B are plug welded or ring welded to the top plate portion 42 of the lower horizontal frame 4 (or the top plate portion 32 of the upper horizontal frame 3) in a two-layer overlapping state.

[0066] Also, for example, the manufacturing method of the present railway vehicle 10 includes a side structure block forming process S2 in which the side structure block 5H is formed by joining the side structure block 5H and the vertical frame 6, and a side structure block forming process S3 in which the top plate portions 32, 42, 72, 82 of the upper horizontal frames 3, 7 and the lower horizontal frames 4, 8 of the side outer plate reinforcement block 1H are welded to the side structure block 5H and the side structure block 5H to form the side structure blocks GK1, GK2, GK3. However, when the corner reinforcement plate 63 is joined to the passenger compartment side of the flange portion 61 and the flange protruding portion 62 on the side window 2 side of the vertical frame 6, a part of the corner reinforcement plate 63 may be joined to the passenger compartment side of the flange portions 61, 61B on the side window 2 side of the vertical frame 6 in the side structure block forming process S2, and the other part of the corner reinforcement plate 63 may be joined to the passenger compartment side of the flange protruding portions 62, 62B in the side structure block forming process S3.

[0067] <Action and effect> According to the railway vehicle 10 of this embodiment described in detail above, the flange portions 31, 71 of the upper cross beams 3, 7 are laser welded to the curtain portion 1a along the longitudinal direction of the vehicle, and the flange portions 41, 81 of the lower cross beams 4, 8 are laser welded to the waist portion 1b along the longitudinal direction of the vehicle, thereby improving the appearance of the curtain portion 1a and waist portion 1b of the side panel 1 while increasing the strength in the longitudinal direction of the vehicle.

[0068] In addition, the wind-come portion inner plate 5 is welded to the top plate portions 32, 42, 72, 82 of all the upper cross beams 3, 7 and all the lower cross beams 4, 8, and the vertical beams 6 extend from the upper end portion 521 to the lower end portion 531 of the wind-come portion inner plate 5, so that all the upper cross beams 3, 7 and all the lower cross beams 4, 8 can be connected to the passenger compartment side by the wind-come portion inner plate 5 and the vertical beams 6 at the vehicle longitudinal intermediate portion of the side window 2, thereby increasing the strength in the vertical direction of the vehicle. This reduces the number of parts that reinforce the side outer plate 1 that forms the horizontally long side window 2, and therefore the welding man-hours can be reduced.

[0069] Therefore, according to this embodiment, a railway vehicle 10 can be provided that can effectively reinforce the cabin side of the side window 2 while improving the appearance of the side outer panel 1 having a horizontally long side window 2 and reducing the number of parts and welding labor.

[0070] According to this embodiment, the vertical frame 6 is formed in a hat-shaped cross section, and is provided with flange protrusions 62, 62B that protrude from the outer edge of the flange portion 61 in the vehicle longitudinal direction and are spaced apart from each other at the position of the upper horizontal frame 3 adjacent to the upper end portion 21 of the side window 2 and at the position of the lower horizontal frame 4 adjacent to the lower end portion 22 of the side window 2. The inner plate 5 is provided with a flange portion 51 formed in the region of the side window 2, an upper flange portion 52 formed wider than the flange portion 51 in the region of the curtain portion 1a, and a flange portion 53 formed wider than the flange portion 51 in the region of the waist portion 1b. and a lower blown-up extension 53 formed on the upper blown-up extension 52, and the upper blown-up extension 52 and the lower blown-up extension 53 are expanded in the vehicle longitudinal direction more than the flange protrusions 62, 62B, so that the upper corner SM of the vehicle where the upper blown-up extension 52 intersects with the upper blown-up extension 52 and the lower corner SM of the vehicle where the upper blown-up extension 52 intersects with the lower blown-up extension 53 can be reinforced in a state where the upper blown-up extension 52 and the flange protrusions 62, 62B and the lower blown-up extension 53 and the flange protrusions 62, 62B are overlapped in two. This alleviates stress concentration at the upper and lower corners SM, and makes it possible to more effectively reinforce the side outer panel 1 on the cabin side of the side window 2.

[0071] In addition, in each region of the curtain portion 1a and the waist portion 1b of the side outer panel 1, the welding positions for welding the upper extension portion 52 and the lower extension portion 53 of the wind-come portion inner panel 5 to the top panel portions 32, 42, 72, 82 of the upper cross frame 3, 7 and the lower cross frame 4, 8 can be distributed over a wider range. Therefore, while increasing the connection strength between the upper cross frame 3, 7 and the lower cross frame 4, 8 and the wind-come portion inner panel 5, the welding heat generated when welding the wind-come portion inner panel 5 to the upper cross frame 3, 7 and the lower cross frame 4, 8 can be distributed over a wider range. As a result, the side outer panel 1 can be reinforced more effectively on the cabin side of the side window 2, while the thermal effect on the side outer panel 1 can be further reduced, and the appearance of the side outer panel 1 can be improved.

[0072] According to this embodiment, at least one of the corners SM at the upper part of the vehicle where the upper-side column portion 51 and the upper-side column extension portion 52 intersect and the corners SM at the lower part of the vehicle where the lower-side column portion 51 and the lower-side column extension portion 53 intersect is provided with a corner reinforcing plate 63 formed in a substantially L-shape in a plan view, which is joined to the passenger compartment side of the flanges 61, 61B and flange protrusions 62, 62B on the side window 2 side of the vertical frame 6, so that the corners SM where stress tends to concentrate can be reinforced more firmly by the flanges 61, 62B and flange protrusions 62, 62B on the side window 2 side of the vertical frame 6 and the corner reinforcing plate 63 in a multi-layered state. Also, since the corner reinforcing plate 63 is joined to the passenger compartment side of the flanges 61, 61B and flange protrusions 62, 62B on the side window 2 side of the vertical frame 6, the corner reinforcing plate 63 can be added later as necessary. Therefore, the reinforcing effect of the corner portion SM can be enhanced simply and with a degree of freedom.

[0073] According to this embodiment, the inner plate 5 is laser welded to the top plate parts 32, 42, 72, 82 of the upper cross bones 3, 7 and the lower cross bones 4, 8 along the vehicle vertical direction at a position different from the vertical bones 6, so that the inner plate 5 and the top plate parts 32, 42, 72, 82 of the upper cross bones 3, 7 and the lower cross bones 4, 8 can be stably laser welded in a two-ply state, and poor penetration of laser welding can be easily avoided. Also, the inner plate 5 is laser welded to the top plate parts 32, 42, 72, 82 along the vehicle vertical direction, so that the inner plate 5 and the upper cross bones 3, 7 and the lower cross bones 4, 8 can be welded at more points at positions adjacent to the vertical bones 6, and the connection strength between the inner plate 5 and the vertical bones 6 to the upper cross bones 3, 7 and the lower cross bones 4, 8 can be increased. Therefore, the side outer plate 1 in which the horizontally long side window 2 is formed can be reinforced even more effectively on the cabin side of the side window 2.

[0074] In addition, the manufacturing method for a railway vehicle according to this embodiment includes a side panel reinforcement block forming step S1 in which the side panel 1 and the flanges 31, 41, 71, 81 of the upper cross beams 3, 7 and the lower cross beams 4, 8 are laser-welded to form the side panel reinforcement block 1H, thereby improving the strength in the longitudinal direction of the vehicle while improving the appearance of the curtain portion 1a and the waist portion 1b of the side panel 1. Note that the upper cross beams 3, 7 are arranged in parallel on the cabin side of the side panel 1 above the side window 2, and the lower cross beams 4, 8 are arranged in parallel on the cabin side of the side panel 1 below the side window 2, and are arranged in parallel on the cabin side of the side panel 1 below the side window 2, and are arranged in parallel on the cabin side of the side panel 1 below the side window 2, so that the upper cross beams 3, 7 and the lower cross beams 4, 8 can be arranged separately from each other with respect to the curtain portion 1a and the waist portion 1b, and the movement space of the laser beam RB during laser welding can be linearly secured. Therefore, the flanges 31, 71 of the upper cross beams 3, 7 and the flanges 41, 81 of the lower cross beams 4, 8 can be quickly welded to the curtain portion 1a and the waist portion 1b of the side panel 1. As a result, the number of welding steps can be reduced.

[0075] According to this embodiment, the method includes a step S2 for forming the side reinforcement block 5H by joining the side plate 5 to the vertical frame 6. In addition to the step S1 for forming the side plate reinforcement block 1H by laser welding the side plate 1 to the flanges 31, 41, 71, 81 of the upper horizontal frame 3, 7 and the lower horizontal frame 4, 8, the side plate 5 can be joined to the vertical frame 6 to form the side plate reinforcement block 5H in advance. Therefore, the side plate 5 can be joined to the vertical frame 6 to form the side plate reinforcement block 5H with a simple structure, which reduces the number of parts and the labor required for welding. In addition, the side plate 1 can be laser welded to the flanges 31, 41, 71, 81 of the upper horizontal frame 3, 7 and the lower horizontal frame 4, 8 before welding the side plate 5 to the upper horizontal frame 3, 7 and the lower horizontal frame 4, 8. Therefore, there is no need to straighten the upper cross beams 3, 7 and the lower cross beams 4, 8, which are deformed by welding the inner plate 5 at the winding section, before laser welding. This reduces the man-hours required for correction such as straightening, while improving the welding quality in laser welding, thereby improving the appearance of the curtain portion 1a and the waist portion 1b of the side outer plate 1 and increasing the strength in the longitudinal direction of the vehicle.

[0076] According to this embodiment, the side structure block forming process S3 is provided, in which the top plate portions 32, 42, 72, 82 of the upper cross frame 3, 7 and the lower cross frame 4, 8 of the side outer panel reinforcement block 1H are welded to the inner plate 5 of the side outer panel reinforcement block 5H to form the side structure blocks GK1, GK2, GK3. Therefore, the top plate portions 32, 42, 72, 82 of the upper cross frame 3, 7 and the lower cross frame 4, 8 of the side outer panel reinforcement block 1H, which have already been laser-welded to the flange portions 31, 41, 71, 81 of the upper cross frame 3, 7 and the lower cross frame 4, 8, and which have been increased in rigidity, can be welded to the inner plate 5 of the side outer panel reinforcement block 5H. Therefore, deformation and thermal strain occurring in the side outer panel 1 when the top plate portions 32, 42, 72, 82 of the upper cross frame 3, 7 and the lower cross frame 4, 8 are welded to the inner plate 5 of the side outer panel reinforcement block 5H can be significantly reduced.

[0077] Therefore, according to this other embodiment, a manufacturing method for a railway vehicle 10 can be provided that can effectively reinforce the cabin side of the side window 2 while improving the appearance of the side outer panel 1 having a horizontally long side window 2, by reducing the number of parts and welding labor. [Industrial Applicability]

[0078] INDUSTRIAL APPLICABILITY The present invention can be utilized as a railway car using stainless steel plate for the side outer panels of the car body and having long side windows formed continuously in the longitudinal direction of the car, and as a manufacturing method thereof. [Explanation of symbols]

[0079] 1 Side shell 1a Makubu 1b Lower back 1H Side shell reinforcement block 2 Side windows 3, 7 superior transverse bone 4, 8 Inferior transverse bone 5 Inner board of blowing section 5H Fukiyose reinforcement block 6. Vertical bone 10. Railroad cars 21 Upper end 22 Lower end 31, 41, 61, 61B, 71, 81 Flange part 32, 42, 72, 82 Top plate 51 Fukiyose pillar section 52 Kami-Fukiyose Extension 53 Shimofuyose Extension 62, 62B Flange protrusion 63 Corner reinforcement plate 521 Upper end 531 Lower end GK1, GK2, GK3 side structure blocks S1 Side panel reinforcement block forming process S2 Reinforcement block forming process S3 side structure block forming process SK Stainless Steel Plate SM Corner ST body

Claims

1. A stainless steel plate is used for the side outer plate of a car body, the side outer plate is provided with a horizontally long side window formed continuously in the longitudinal direction of the car, and upper cross beams having a hat-shaped cross section are arranged in parallel and spaced apart from each other above and below the side window on the passenger compartment side of the curtain portion of the side outer plate above the car, and lower cross beams having a hat-shaped cross section are arranged in parallel and spaced apart from each other above and below the passenger compartment side of the waist portion of the side outer plate below the side window, A railway vehicle equipped with a windscreen reinforcement block having a windscreen inner plate that connects the upper cross frame and the lower cross frame on the passenger compartment side at a vehicle longitudinal direction intermediate portion of the side window, and a vertical frame joined to the windscreen inner plate on the passenger compartment side, Each flange portion of the upper cross frame is laser welded to the roof section along the vehicle longitudinal direction, and each flange portion of the lower cross frame is laser welded to the waist section along the vehicle longitudinal direction, The inner plate of the blow-through portion is welded to each top plate portion of all of the upper cross bones and all of the lower cross bones, The railway vehicle, wherein the vertical bone extends from an upper end to a lower end of the inner plate of the winding section.

2. 2. The railway vehicle according to claim 1, The vertical bone is formed in a hat-shaped cross section, and is provided with flange protrusions protruding from outer edges of flange portions in the vehicle longitudinal direction at the position of the upper horizontal bone adjacent to the upper end of the side window and at the position of the lower horizontal bone adjacent to the lower end of the side window, the flange protrusions being spaced apart from each other. The said inner panel of the said soffit portion comprises a soffit column portion formed in the region of the said side window, an upper soffit extension portion formed wider than the said soffit column portion in the region of the said curtain portion, and a lower soffit extension portion formed wider than the said soffit column portion in the region of the said waist portion, The upper and lower extensions are extended in the longitudinal direction of the vehicle to a greater extent than the flange protrusions.

3. In the railway vehicle according to claim 2, a corner reinforcement plate formed in an approximately L-shape in a plan view at at least one of the corners at the upper part of the vehicle where the upper beam column portion and the upper beam extension portion intersect, and the corners at the lower part of the vehicle where the lower beam column portion and the lower beam extension portion intersect, is joined to the flange portion on the side window side of the vertical frame and to the cabin side of the flange protrusion.

4. 2. The railway vehicle according to claim 1, the inner plate of the cross beam is laser welded to each top plate portion of the upper cross beam and the lower cross beam in the up-down direction of the vehicle at a position different from the vertical beam.

5. The method for manufacturing a railway vehicle according to any one of claims 1 to 4, a side panel reinforcement block forming process in which the side panel and the flange portions of the upper cross frame and the lower cross frame are laser-welded to form a side panel reinforcement block; a blow-over reinforcement block forming step of joining the blow-over portion inner plate and the vertical frame to form the blow-over reinforcement block; a side structure block forming process of welding the top plate portions of the upper cross beam and the lower cross beam of the side skin panel reinforcement block to the blow-over portion inner plate of the blow-over reinforcement block to form a side structure block; A manufacturing method for a railway vehicle comprising:

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