JP7561786B2 - Railway vehicle structure - Google Patents

Description

This invention relates to a joint structure for corner posts to side exterior panels joined by a back-cut structure.

One known method for manufacturing the side structure of a railway vehicle is a side outer panel structure in which a fascia and a waist panel are joined together by a back-cut structure in which one plate is overlapped at the edge of the other plate with a step equal to the thickness of the other plate. In such side outer panels, the back-cut structure is often configured so that it is covered and hidden in the space between a pair of flanges by a cross bone with a hat-shaped cross section. The structure of the cross bone that covers the back-cut structure is described in Patent Document 1 (Figure 7).

When crossing a hat-shaped vertical frame at the end of a horizontal frame as described above, one of the pair of flanges of the vertical frame is placed on top of the horizontal frame, and the other is welded to the side panel.

In this case, the flange portion of the vertical frame that is joined to the side skin crosses the back support structure, so it is necessary to close the gap in the overlapping area by the thickness of the skin.

Conventionally, to eliminate this gap, a flat joint structure was used in which the edges of the boards were butted together, instead of a back cut structure, only in the area where the flanges of the vertical bones were joined.

JP 2021-70422 A

However, as mentioned above, if the upper and lower side panels (the fascia and the waist panel) are joined with a flat joint structure, the watertightness is reduced only in the area where the flanges of the vertical ribs are joined. Therefore, it is necessary to apply sealing processing only to this flat joint structure area. If sealing processing is applied only to a part of it like this, not only does it increase the amount of work, but it also mars the aesthetics of the side of the car body.

Incidentally, the frame material for the entrance/exit is fitted from the outside of the car, so the longitudinal edges of the side panels can be covered regardless of whether they are sealed or not. However, the side panels that join the corner posts, which are divided into a side structure side and a gable structure side, need to be joined from the inside of the car, so the outer surface of the side panels cannot be covered.

The present invention aims to provide a railway vehicle body structure that allows side skin panels to be joined using a back-cut structure even in corner post joint areas.

In order to achieve the above-mentioned object, the railway vehicle body structure of the present invention is a railway vehicle body structure in which corner posts are divided into a side body structure side and an end body structure side, and is characterized in that it comprises side outer plates joined above and below by a back-cut structure, a side corner post located on the side body structure side of the corner posts, with the area that intersects with the back-cut structure cut out and joined to the inside side of the side outer plate with a plate-shaped joint having the same thickness as the step of the back-cut structure , and an end corner post located on the end body structure side and having a flat surface joined to the inside side of the car of the joint of the side corner post.

In addition to the above configuration, the railway vehicle body structure of the present invention is characterized in that the side corner columns are formed from steel material with a hat-shaped cross section, with the joint portion being a flange portion.

As described above, according to the present invention, the joints of the side corner columns are not affected by the back-cut structure, so steps or gaps can be prevented from forming at the joints around the back-cut structure. This makes it possible to join the gable corner columns to the flat surface formed by the joints. In turn, it becomes possible to form the back-cut structure up to the edge where the corner columns are formed.

In addition to the above effects, the present invention also eliminates the need to provide a spacer that acts as a back support plate, which is equivalent to a back support structure. This reduces the number of steps, and enables cost reduction and vehicle weight reduction.

FIG. 2 is a partially enlarged perspective view of the area around a corner post of the railway vehicle body structure of the present invention. FIG. 2 is an exploded perspective view of a corner post of the structure of FIG. 1; FIG. 2 is a front view of the structure of FIG. 1; 4 is a longitudinal sectional view taken along line AA in FIG. 3. 4 shows cross-sectional views of the structure of FIG. 3, where (a) is a cross-sectional view taken along line BB, and (b) is a cross-sectional view taken along line CC.

The following describes the structure of a railway vehicle according to an embodiment of the present invention with reference to the drawings.

Figure 1 is an enlarged perspective view of a portion of the structure of the railway vehicle of the present invention, around a corner post. Also, Figure 2 is an exploded perspective view of the corner post of the structure of Figure 1. In these Figures 1 and 2, the direction in the longitudinal direction of the vehicle is represented by the outer side L1 and the inner side L2, and the direction in the transverse direction of the vehicle is represented by the outer side W1 and the inner side W2.

As shown in FIG. 1, in the structure of the railway vehicle according to the present invention, the corner posts 8 are composed of a side corner post 10 on the side structure 1 side and an end corner post 12 on the end structure 2 side.

Figure 1 shows an enlarged view of the area where the side panel 4, which is the fascia board, and the side panel 6, which is the wainscoting, are joined together. A back cut portion 6a is formed at the upper end of the side panel 6, and it can be seen that the side panels 4 and 6 are joined together by a back cut structure.

As can be seen from FIG. 2, an area is shown on the side structure 1 where two cross bones 14 with hat-shaped cross sections are arranged, and a back cutting structure (back cutting portion 6a) is formed to straddle the space between a pair of flange portions 14a of the upper cross bone 14.

As shown in Figure 2, which shows the corner post 8 disassembled, the side corner post 10 is made of a hat-shaped steel material. As can be seen by also referring to Figure 1, the side corner post 10 has one flange portion 10a joined to the cross frame 14, and the other flange portion 10b (joint portion) joined to the side outer panels 4 and 6.

In the side corner column 10 of the configuration according to the present embodiment, a notch 10c is formed in the area of the flange portion 10b joined to the side outer plates 4 and 6 that intersects with the back-cut structure (back-cut portion 6a). With this configuration, the flange portion 10b is not raised by the thickness of the back-cut portion 6a, so that the flange portion 10b can be joined directly to the side outer plates 4 and 6 without interposing a separate member such as a spacer. Then, it becomes possible to form the back-cut portion 6a up to the edge of the side outer plate 6. As a result, the watertight structure formed by the back-cut structure is formed without interruption up to the edge of the side outer plates 4 and 6, so that it is not necessary to perform sealing processing between the side outer plates 4 and 6. Therefore, the number of steps can be reduced, and the aesthetic appearance of the outer surface of the side structure 1 can be prevented from being damaged.

When the corner post 8 is divided into the side structure 1 side and the end structure 2 side, as in the configuration of this embodiment, a rib 12a must be formed in order to give the end corner post 12 a certain level of strength. The formation of this rib 12a makes it impossible to join the end corner post 12 to the outer surface of the side outer panels 4, 6. However, according to the present invention, a flat surface that is not affected by the back cut portion 6a can be formed on the flange portion 10b of the side corner post 10. This allows the end corner post 12 to be tightly attached to the side corner post 10 without any gaps, making it possible to configure the corner post 8 without reducing strength.

The longitudinal edges of the side panels 4 and 6 (the outer edges L1 in FIG. 2) are provided with seals 16 to make the gap between the panels and the corner posts 8 watertight. The seals 16 will be explained using a front view.

Figure 3 is a front view of the structure in Figure 1. Here, for ease of explanation, the seal 16 is shown with diagonal lines. In this front view, the structure around the seal 16 is hidden behind the back of the end corner post 12, so it is shown with dotted lines. Of the multiple dotted lines, the lines of the side outer plates 4 and 6 are shown on the outermost side (L1) in the longitudinal direction of the vehicle. The edge of the side corner post 10 is shown slightly inside (L2) these side outer plates 4 and 6. In other words, the edge of the side corner post 10 is inward (L2) in the longitudinal direction of the vehicle than the edges of the side outer plates 4 and 6. The seal 16 is formed in the range from the edge of the side corner post 10 that is inward (L2) to the area that exceeds the side outer plates 4 and 6 to the outside (L1).

As described above, the back cut 6a is formed up to the edge of the side outer panel 6 on the outer side (L1) in the longitudinal direction of the vehicle. Therefore, in the area where the back cut 6a is formed, the seal 16 is formed from the edge of the side outer panels 4, 6 to the outside (L1), not from the edge of the side corner post 10.

Figure 4 is a longitudinal cross-sectional view taken along line A-A in Figure 3. The side corner post 10 is visible on the inside W2 in the vehicle width direction. The rib 12a of the end corner post 12 is visible near the center of the vehicle width direction in Figure 4 (see Figure 2). The cross-sectional shapes of three layers are visible near the outside (W1) in the vehicle width direction. Of these three cross-sections, the cross-section of the end corner post 12 connected to the rib 12a is located on the innermost side (W2). On the other hand, the cross-sections located on the outermost side (W1) are the side outer plate 4 and the side outer plate 6. The side outer plate 6 is arranged so that the back cut portion 6a overlaps the lower end of the upper side outer plate 4. The flange portion 10b of one of the side corner posts 10 is located above and below this back cut portion 6a in the same layer. It can be seen that the back cut portion 6a is located between the notches 10c of the flange portion 10b.

As shown in Figure 4, the back cut portion 6a of the side outer plate 6 and the flange portion 10b of the side corner post 10 are formed as plates with the same thickness, so the end corner post 12 can be joined without any gaps. In addition, the back cut portion 6a overlaps the side outer plate 4 to an extent sufficient to maintain watertightness, so there is no need to apply any sealing other than the seal 16 (see Figure 3) provided on the outside (L1) in the longitudinal direction of the vehicle.

Figure 5 shows cross-sectional views of the structure in Figure 3, where (a) is a cross-sectional view taken along line B-B, and (b) is a cross-sectional view taken along line C-C.

Figure 5 (a) shows a cross section cut at the position of the back cut portion 6a. It can be seen that the back cut portion 6a passes through the inside of the cross frame 14 and extends to the same outer edge (L1) as the side outer plate 4 in the longitudinal direction of the vehicle. The side corner column 10 is formed of a steel material with a hat-shaped cross section, and is arranged so that one flange portion 10a rests on the cross frame 14. The other flange portion 10b is hidden behind the back cut portion 6a in the cross-sectional view of Figure 5 (a) where the notch 10c is formed. As mentioned above in the explanation using Figure 4, it can be seen that the back cut portion 6a and the end corner column 12 are joined. The seal 16 is arranged to cover the edge of the back cut portion 6a of the side outer plate 4 and the side outer plate 6, and to fill the corner formed between the end corner column 12.

Figure 5(b) shows a cross section cut below the back cut portion 6a. In the region of Figure 5(b), the flange portion 10b of the side corner post 10 does not have a notch 10c formed therein, so the flange portion 10b is joined to the side outer plate 6. The flange portion 10a is joined onto the cross bone 14, as in Figure 5(a). As shown in Figure 5(b), the outer edge (L1) of the side corner post 10 in the longitudinal direction of the vehicle stops at a position slightly inner (L2) than the side outer plate 6. Therefore, a gap is formed between the outer edge (L1) of the side outer plate 6 and the gable corner post 12. The seal 16 is arranged to fill this gap.

1 Side structure 2 Gable structure 4 Side outer plate (skirt plate)
6 Side outer plate (wainscot)
6a Back cut portion 8 Corner column 10 Side corner column 10a, 10b Flange portion (joint portion)
10c Notch 12 End corner post 12a Rib 14 Cross bone 14a Flange portion 16 Seal

Claims (2)

A railway vehicle body structure in which corner posts are divided into a side body structure side and a gable body structure side,
The side panels are joined together at the top and bottom with a back-cut structure,
a side corner post that is located on the side structure side of the corner post, has a region that intersects with the back support structure cut out , and is joined to the inside of the side outer plate at a plate-shaped joint having the same thickness as the step of the back support structure ;
a side corner post having a flat surface that is located on the side of the end body structure and joined to the inside side of the car of the joint of the side corner post. The railway vehicle body structure described in claim 1, characterized in that the side corner columns are formed of steel material with a hat-shaped cross section, with the joint portion being a flange portion.

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