JPS592670B2 - car body structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automobile body structure, and in particular, improves strength and rigidity by improving the joint between a center pillar and a side sill, which are box-shaped cross-sectional members.

A center pillar and a side sill that constitute an automobile body each have a box-shaped cross section formed by joining an outer panel and an inch panel.

Therefore, since the joint between the center pillar and the side sill is a joint between box-shaped cross sections, the joining work cannot help but be quite complicated.

In conventional coupling between a center pillar and a side sill, as shown in FIG. The outer 1a of the pillar 1 and the inner 1
Generally, the outer 2a and the inner 2b of the side sill 2 are connected to each other by the spora 11 at the joint flange portion.

However, in the case constructed using the conventional method as described above, the pillar 1 which has a box-shaped cross section among the joining flanges of the side sill 2
Currently, the part A hidden inside the side sill cannot be welded, and only the armpit part A remains unwelded, which is extremely unfavorable in terms of strength and rigidity of the side sill.

The present invention attempts to deal with the above problems and is as follows:
The embodiments shown in FIGS. 3 to 3 will be described.

In Figures 1 to 3, 1 is a center pillar formed in a box-shaped cross section by joining an outer 1a and an inner 1b, and 2 is a side sill formed in a box-shaped cross section by joining an outer 2a and an inner 2b. 1 inner 1
The lower portion b is recessed toward the outer 1a side from the joining flange 10 portion, and a recessed portion 1d is formed on the inside of the vehicle interior.

When the outer 1a and the inner 1b are joined together by spot welding at the joint flange 10, the lower end 1e of the recess 1d overlaps the inner side of the lower end of the outer 1a.

Therefore, first, the outer 1a and the inner 1b as described above are brought together and their joint flange 1c is joined by spot welding to form the center pillar 1 with a box-shaped cross section. The overlapping portion of the concave lower end 1e of the inner 1a and the inner 1b is placed on the outer surface of the side sill outer 2a, and the above-mentioned Ia, 1e and the side sill outer 2a are stacked as three and spot welded W1.

After the lower end of the center pillar 1 is joined to the side sill outer 2a in this manner, the side sill inner 2b is brought into contact with the inside of the side sill outer 2a, and the joining flange 20 is spot welded W2 to complete the joining and assembly.

In this case, the joint flange 2cl at the joint part of the side sill 2 with the center pillar 1 is connected to the center pillar inner 1.
Spot welding can be carried out freely because the concave part 1d formed in b is exposed to the inside of the passenger compartment, and as in the conventional structure shown in Fig. Compared to the case where spot bonding is not possible, the strength and rigidity of the bonded portion can be greatly increased, and the bonding workability can also be improved.

Furthermore, according to the present invention, since the recess 1d is formed on the inner surface of the lower part of the center pillar 1, the recess 1d can be used as a storage attachment point for a seat belt retractor in a seat belt device for protecting an occupant. The conventional difficulty in finding a place to install a large seatbelt retractor can be completely eliminated by utilizing the recessed portion at the bottom of the center pillar in the configuration of the present invention, which is extremely effective.

[Brief explanation of the drawing]

Figure 1 is a perspective view of essential parts showing an embodiment of the present invention, Figures 2 and 3 are cross-sectional views taken along the X-X line and Y-Y line in Figure 1, and Figure 4 is a vertical cross-section of the conventional structure. This is a schematic diagram. 1... Center pillar, 1a... Outer, 1b... Inner, 1c... Joining flange, 1d... Recess, 1e... ...lower end, 2...side sill, 2a...outer, 2b...inner, 2c...joint flange.

Claims (1)

[Claims] 1. The lower part of the center pillar inner of the center pillar, which is formed into a box-shaped cross section by joining the center pillar outer and the center pillar inner, is recessed toward the center pillar outer side to form a recess on the inside of the vehicle interior, and the center pillar inner has a recess. A vehicle body structure for an automobile, characterized in that a lower end is overlapped with a lower end of a center pillar outer and welded together to the outer surface of a side sill outer, and a side sill inner is abutted against the inside of the side sill outer and these are welded and coupled.