JPS638535Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an outer panel structure for a stainless steel vehicle body.

In recent years, stainless steel car bodies, which do not require exterior painting, have been increasingly used for railway vehicles.

As shown in FIG. 1, this stainless steel vehicle body is provided with an outer panel structure 2 made of stainless steel plate material on the side surface of the vehicle 1.

As shown in FIG. 2, this outer panel structure 2 is formed by sequentially connecting a curtain outer panel 3, a window section outer panel 4, and a waist outer panel 5 from above. The welded outer plate 4 is integrally formed by welding a vertical member 4a and a horizontal member 4b along a welding line 6 at a position outside the R portion of the window.

On the other hand, the window outer panel 4, the curtain outer panel 3, and the window outer panel 4
Arc welding is not used for the connection between the and the waist outer plate 5. This is because it is impossible to remove thermal distortion caused by arc welding in stainless steel car bodies, and the exterior is not painted.

Therefore, conventionally, the window outer panel, the curtain outer panel, and the waist outer panel were connected by a corrugation method as shown in FIGS. 3 and 4.

That is, the curtain outer panel 3 having a short length in the vertical direction is connected below the roof outer panel 7 by spot welding 8, and the waist outer panel 5 having a short length in the vertical direction is attached to the underframe 9 by spot welding 1.
0, and the curtain outer panel 3 and the window outer panel 4
Spot weld the curtain corrugated plate 11 between the
2 and 13, and a waist corrugated board 14 is spot welded between the window outer panel 4 and the waist outer panel 5.
It was set up by 16.

Each of the corrugated plates 11 and 14 has a zigzag cross-sectional shape in the vertical direction, and due to its longitudinal elasticity, it absorbs the distortion generated during manufacturing of the outer plate 2 and makes it less noticeable.

However, although the corrugated outer panel 2 shown in FIGS. 3 and 4 has the advantage of not requiring exterior painting, the grooves 11 of each corrugated panel 11,
A and 14a tend to get dirty, and the dirt does not come off even after being washed in a vehicle washer, resulting in the inconvenience that the appearance of stainless steel is impaired.

In order to eliminate this inconvenience, it is possible to form the curtain outer panel 3 and the waist outer panel 5 into a flat plate shape as shown in FIG. It is possible.

Therefore, conventionally, as in the waist outer panel 5 shown in FIG. In addition to being divided into a plurality of stages in the direction, the bead 17 is formed to be vertically stretchable to eliminate distortion in the vertical direction.

However, the waist outer plate 5 on which this bead 17 was formed
Although the attached dust can be easily washed and removed, in order to maintain vertical rigidity, that is, to increase shear strength, the inner surface of the flat plate has a roughly W-shaped cross section as shown in Figure 5. horizontally long reinforcing material 18
had to be fixed by spot welding 19.

Using the reinforcing material 18 in this manner increases the weight of the outer panel, and there is no point in trying to reduce the weight of the vehicle body by using thin plate materials for the outer panel.

In addition, conventionally, as shown in FIG. 6, at the connecting part of the curtain outer panel 3, the window outer panel 4, and the waist outer panel 5, the edges of any of the outer panels, that is, in this figure, the curtain outer panel 3 and It is necessary to form bent portions 20, 20 at the lower end of the window outer panel 4. However, this bent part 2
There were disadvantages such as the use of a special bending die to form the 0.

As described above, conventional outer panels lack a good method for joining each outer panel.

The present invention was developed in view of these points, and has a simple structure, high shear strength, can effectively prevent overall distortion, is easy to process, and has a good appearance. The purpose is to provide an outer panel structure for a stainless steel car body that is beautiful and light in weight.

The present invention will be described below with reference to embodiments shown in FIGS. 7 to 15.

The present invention has a plurality of beads 1 as shown in FIG.
7 and 17 are provided, and the outer panel 2 is divided into a plurality of stages in the vertical direction, and is formed by applying a reinforcing material having a U-shaped cross section to the inside of each bead.

FIG. 8 shows an embodiment of the present invention.

In this embodiment, beads 17 are formed at the joint between the curtain outer panel 3 and the window outer panel 4, at the joint between the window outer panel 4 and the waist outer panel 5, and at the intermediate portion of the waist outer panel 5. Each bead 17 is formed by roll forming the curtain outer panel 3 and the waist outer panel 5.

The upper end of the curtain outer plate 3 is sandwiched between the roof outer plate 7 and an upper stringer 21 having a U-shaped cross section, and is spot welded 2.
2 and 22 are fixed to each other. On the other hand, a bead 17 is formed at the lower end of the curtain outer panel 3, and the flat plate above the bead 17 is connected to the window outer panel 4.
The reinforcing member 23a has a substantially U-shaped cross section and is in contact with the back surface of the reinforcing member 23a, which is a part of the window stringer 23 attached to the inner surface of the window. The lower flat plate portion of the bead 17 holds the upper end portion of the window outer panel 4 with a reinforcing member 23a, and each member is fixed to each other by spot welding 24, 24.

A bead 17 is formed at the upper end of the waist outer panel 5, and the upper and lower flat plate portions of this bead 17 are formed on the upper and lower ends of the waist outer panel 3.
As in the case of , the reinforcing member 25a, which is a part of the window lower stringer 25 attached to the inner surface of the window outer panel 4, and has a substantially U-shaped cross section, is brought into contact with the back surface of the reinforcing member 25a and the window outer frame 4, respectively. , and are fixed to each other by spot welds 26, 26.

In addition, a bead 1 formed in the middle part of the waist outer plate 5
The back surface of a reinforcing member 28 having a substantially U-shaped cross section and extending between vertical columns 27, 27 (FIG. 7) attached to the inner surface of the outer panel 2 is in contact with the inner surface of the outer panel 7. The reinforcing material 28 and the waist outer plate 5 are fixed to each other by spot welding 29, 29.

A lower stringer 30 is sandwiched between the lower end of the waist outer plate 5 and the underframe 9, and they are fixed to each other by spot welding 10.

When assembling the outer panel 2 configured in this manner, the vertical elasticity of each beat 17 is used to appropriately expand and contract the chevron shape of each beat 17 to divide and absorb distortion occurring in the outer panel. , the outer plate 2 is assembled so that there is no distortion in the flat plate part as a whole. This assembly may be carried out in a normal manner, and detailed explanation will be omitted.

Next, the functions and effects of this embodiment will be explained.

Since the bead 17 is formed at the connecting portion between the upper and lower ends of the window outer panel 4 and the curtain outer panel 3 and waist outer panel 5, there is a special feature in that the bent portion 20 is formed at the connecting section of the outer panel as in the conventional case. No processing required. This is because the bead 17 formed by roll forming and the flat plate portions at the upper and lower ends of the bead 17 are placed over the upper and lower ends of the window outer panel 4, and then spot welded 24, 26 to each outer panel 3, 4, 5. This is because they can be easily connected to each other.

In addition, as illustrated in FIG. 9, in this embodiment, the shear force F acting on the outer panel (the waist outer panel 5 in the figure) is applied to the reinforcing material fixed to the inner surface of the bead 17 ( In the figure, the bead 17 does not expand or contract in the vertical direction because it propagates through the back surface 28a of the reinforcing member 28). This is because the shear force F is propagated through the back surface portion 28a, which is a flat plate. Also, the 10th
As shown in the figure, a horizontally elongated aggregate 31 with a large section modulus and a triangular closed cross section is formed between the bead 17 and the back surface 28a of the reinforcing material 28, and this aggregate 31 and the reinforcing material with a U-shaped cross section are formed. By combining with 28, the bending moment acting on the entire outer panel 2 can be supported by the aggregate having a larger section modulus.
Therefore, overall and local deformation of the outer panel 2 can be prevented. Furthermore, as shown in FIG. 11, the aggregate 31 divides the flat outer panel 2 in the vertical direction at the dotted line position in the figure, thereby effectively preventing buckling of the outer panel 2. This is a thin outer plate 2 that tends to buckle when subjected to compressive force from above and below.
is divided into narrow widths in the vertical direction to form thin plates with high buckling strength.

As described above, this embodiment has high shear strength and can prevent the occurrence of overall distortion of the outer panel.

FIG. 12 shows another embodiment of the invention.

In this embodiment, the curtain outer panel 3, the window outer panel 4, and the waist outer panel 5 are each formed into a flat plate shape, and the hat material 32 is
The bead 17 is formed by the following steps.

That is, the gap between the lower end surface of the curtain outer panel 3 and the upper end surface of the window outer panel 4 is adjusted in size to absorb manufacturing distortion of the side structure, and a groove is formed on the outer surface of the abutting portion of both outer panels 3 and 4. 13
A hat material 32 having a substantially V-shaped cross section and having a flange as shown in the figure is placed over the gap, and is attached by spot welding 33, 33.
2. Both outer panels 3, 4 and reinforcing material 23a are integrally joined. In addition, the lower end of the window outer panel 4, the upper end of the waist outer panel 5, the hat material 32, and the reinforcing material 25a.
are joined in the same manner as above. Further, a reinforcing material 28 is brought into contact with a reinforcing material 28 on the inside of a hat material 32 on the front side of the intermediate portion of the waist outer plate 5, and the parts are joined by spot welding 34, 34.

In this example, as in the previous example, the bead 17 and the reinforcing members 23a, 25a, and 28 form an aggregate with a triangular closed cross section, so the shear strength is high and the overall strain on the outer panel is reduced. This can be prevented from occurring. Furthermore, in this embodiment, since each of the outer panels 3, 4, and 5 can be made into a flat plate,
There is no need to form a bead by roll forming, and the bead can be formed by using a hat material of the same shape, so manufacturing is easy and the manufacturing cost is low.

In each of the embodiments described above, the spot welding positions on the upper and lower parts of the bead 17 are preferably arranged at regular intervals as shown in the spot welds 29 and 29 in FIGS. 14 and 15 to give a beautiful appearance.

As described above, the stainless steel car body skin structure of the present invention has high shear strength, and the beads can be used to hide distortion, preventing overall distortion from occurring in the skin. It is easy to manufacture, process, and assemble, has a simple structure, is light in weight, and has a beautiful appearance.

[Brief explanation of drawings]

Figure 1 is a schematic side view of the stainless steel car body, Figure 2
The figure is a schematic side view showing the outer panel structure, FIG. 3 is a partial side view showing a conventional outer panel structure using corrugation, FIG. 4 is an enlarged sectional view taken along the - line in FIG. Figure 6 is a sectional view similar to Figure 4 showing a conventional outer panel structure with beads formed therein, Figure 7 is a schematic side view showing the outer panel structure of the present invention, and Figures 8 to 11 are one implementation of the present invention. For example, Fig. 8 is an enlarged sectional view taken along the - line in Fig. 7, Fig. 9 is an enlarged view of a portion of Fig. 8, Fig. 10 is a similar view to Fig. 10 showing the aggregate structure, Fig. 11 is a schematic diagram showing a state in which the outer panel is divided in the vertical direction, Figs. 12 and 13 show other embodiments of the present invention, Fig. 12 is a cross-sectional view similar to Fig. 8, and Fig. 13 is a cross-sectional view of the hull material. 14 is a front view showing the spot welded state of the bead portion, and FIG. 15 is a sectional view taken along the line - in FIG. 14. 1... Stainless steel body, 2... Outer panel structure, 3
... Curtain outer panel, 4... Window outer panel, 5... Waist outer panel, 1
7... Bead, 23a, 25a, 28... Reinforcement material, 24, 26, 29... Spot welding, 32...
...Hut material, 33, 34...Spot welding.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A stainless steel window panel, a stainless steel window panel connected to the lower end of the window panel, and a stainless steel window panel connected to the lower end of the window panel. In the outer panel structure of a stainless steel vehicle body having a stainless steel waist outer panel, each of the outer panels is placed at a position where the curtain outer panel, window outer panel, and waist outer panel are vertically divided into a plurality of stages. A horizontally long bead having a chevron-shaped cross section and a horizontally elongated shape protruding outward from the plate is provided, and the back surface of a reinforcing material having a U-shaped cross section is brought into contact with the inner surface of each outer plate in the portion where the bead is formed, and the bead is , an outer panel structure for a stainless steel vehicle body, characterized in that each outer panel and reinforcing material are fixed to each other by spot welding. 2. A utility model characterized in that the beads are formed at the connecting portion between the window outer panel and the window outer panel, at the connecting portion between the window outer panel and the waist outer panel, and at the intermediate portion of the waist outer panel. An outer panel structure for a stainless steel vehicle body as claimed in claim 1. 3. The outer panel structure of a stainless steel vehicle body according to claim 1 or 2, wherein the beads are formed by protruding each outer panel outward. 4. A request for utility model registration characterized in that the bead is formed by covering the outer surface of the outer panel with a long shaft with flat plate parts connected to both side edges of an angle-shaped member and fixing it by spot welding. The outer panel structure of a stainless steel vehicle body according to scope 1 or 2.