JPS6239374A - Center pillar lower end structure of car - Google Patents

Abstract

PURPOSE:To effectively prevent sectional deformation of a side sill, by a method wherein the inner panel of a center pillar is extended to the lower end of the inner panel of the sill, the extension is joined to the inner panel of the sill and is also joined to a second reinforce. CONSTITUTION:A center pillar 16 is formed in a closed sectional structure by an outer panel 17 and an inner panel 18. A side sill 19 extended in the longitudinal direction of a car body is also formed in a closed sectional structure by an outer panel 20 and an inner panel 21. In this structure, a lower end part 33 of the inner panel 18 is extended to a lower flange part 32 of an outer panel 20, and is joined with the flange part 32. A flange 34B is formed to both side parts of the inner panel 18, the flange 34B is joined with a flange 34A of the outer panel 17, and is further joined at its lower part with a flange 31 of a bulk head 23 serving as a second reinforce.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in the structure of the lower end of a center pillar of an automobile.

[Conventional technology]

Generally, as shown in FIGS. 3 and 4, the center pillar 2 of the automobile 1 that extends in the vertical direction of the vehicle body is formed into a closed cross-sectional structure by a center pillar inner panel 3 and a center pillar outer panel 4, and The side sill 5 extending in the longitudinal direction of the vehicle body is also formed into a closed cross-sectional structure by a sill outer panel 6 and a sill inner panel 7. Such a center pillar 2 and side sill 5 are such that the lower end 8 of the center pillar outer panel 4 is joined to the upper end 9 of the sill outer panel 6, and the lower end 10 of the center pillar inner panel 3 is joined to the sill inner panel 7.
are connected to each other by joining to the upper end portion 11 of. On the side surface of the vehicle interior of the sill outer panel 4, a sill outer reinforcement 14 having a substantially U-shaped cross section is provided as a first reinforcement between the upper step portion 12 and the bottom portion 13. In addition, a bulkhead 15 as a second reinforcement is joined to the side surface of the sill outer reinforcement 14 in the vehicle interior to reinforce the cross section of the side sill 5 and prevent the side sill 5 from torsion of the vehicle body. This prevents cross-sectional changes and ensures the rigidity of the vehicle body (for example, see Utility Model Application No. 59-63080).

Note that the reference numeral 47 in the figure is a floor panel.

[Problems with conventional technology]

By the way, in such a conventional automobile center pillar lower end structure, as described above, the sill outer reinforcement 14 and the bulkhead 15 are installed inside the side sill 5 to reinforce the cross section of the side sill 5. ,
The bulkhead 15 has its upper end 42 , lower end 43 , and left end 44 fixed to the sill outer reinforcement 14 by welding.

However, since the right side end 45 of the bulkhead 15 is not fixed, it is not possible to efficiently prevent cross-sectional deformation of the side sill 5 in response to input to the vehicle body from outside the vehicle body. However, there was a problem in that the weight would inevitably increase due to the need for more complicated reinforcement.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lower end structure of a center pillar for an automobile, which has a simple structure that does not involve a large increase in weight, and is capable of more effectively preventing cross-sectional deformation of a side sill.

[Technical means of the present invention]

In order to achieve this objective, the present invention includes extending the center pillar inner panel to the lower end of the sill inner panel and joining it to the inner surface of the sill inner panel, as well as joining the second reinforcement in the form of a partition wall. It is something.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

As shown in FIG. 1, in the automobile center pillar lower end structure according to this embodiment, the lower end of the center pillar outer panel 17 is connected to the upper surface 24 of the sill outer panel 20.
A substantially U-shaped sill outer reinforcement 22, which is a first reinforcement, is provided along the longitudinal direction of the vehicle body on the inside side of the sill outer panel 20. force 2
2 has a sill outer panel 20, an upper surface portion 25 and a lower surface portion 26.
and are spot welded at the upper end portion 27 of the side surface.

Furthermore, a bulkhead 23 serving as a second reinforcement is provided on the interior side of the sill outer reinforcement 22 along the width direction of the vehicle body. The bulkhead 2
3 is formed to have substantially the same cross-sectional shape as the sill outer reinforcement 22, and has flanges 28 on each of the four sides.
, 29, 30, and 31 are formed. This bulkhead 23 has flanges 28, 29, and 30 spot welded to the side surface of the sill outer reinforcement 22 inside the vehicle interior. In this embodiment, the lower end 33 of the center pillar inner panel 18 is connected to the sill outer panel 2.
0 to the lower end flange portion 32, and is spot welded at the lower end flange portion 32. Further, flanges 34 are provided on both sides of the center pillar inner panel 18.
The flange 34B is connected to the flange 34A of the center pillar outer panel 17, and is further connected to the flange 31 of the bulkhead 23 at the lower part. As shown in FIG. 2, the interior side surface 3 of the center pillar inner panel 18 is
7 is in surface contact with the sill inner panel 21, and spot welded at a plurality of locations to join both panels 18 and 21.

Further, the upper end flange 38 of the sill inner panel 21 is joined to the upper end flange 39 of the sill outer panel 20, and the bent portion 40 of the upper end flange 38 is joined to the side surface portion 46 of the center pillar inner panel 18. Furthermore, a floor panel 47 is joined to the interior side surface portion 41 of the sill inner panel 21.

Therefore, in the automobile center pillar lower end structure according to this embodiment, unlike the conventional structure, the center pillar inner panel 18 extends to the lower end of the side sill 19 and is joined to the sill inner panel 21 and the sill outer panel 20. Bulkhead 23 which is a reinforcement as well as
Because it is connected to the
The bulkhead 23 provided inside the side sill 19 is firmly supported by the center pillar inner panel 18, and changes in the cross section of the side sill can be reliably prevented.

Furthermore, in this embodiment, as described above, since the center pillar inner panel 18 is joined to the sill inner panel 21 and the sill outer panel 20, the center pillar 16
It becomes possible to further improve the bonding strength between the side sill 19 and the side sill 19.

〔Effect of the invention〕

Since the present invention has the above configuration, it is possible to effectively prevent cross-sectional deformation of the side sill without significantly increasing the weight, and the torsional rigidity of the vehicle body can be improved.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing the lower end structure of an automobile center pillar according to the present invention, FIG. 2 is a sectional view taken along the line ■-■ in the assembled state of the center pillar lower end structure shown in FIG. 1, and FIG. 4 is a perspective view generally showing the side surface of an automobile, and FIG. 4 is a sectional view taken along the line IV--IV in FIG. 3, showing the structure of the lower end of a center pillar of a conventional automobile. 16... Center pillar 17... Center pillar outer panel 18... Center pillar inner panel 19... Side sill 20... Sill outer panel 21... Sill inner panel 22... Sill outer reinforcement (first (reinforce) 23... Bulkhead (second reinforcement) Fig. 4

Claims (1)

[Claims] A center pillar outer panel and a center pillar inner panel are joined to form a center pillar with a closed cross section that extends in the vertical direction, while a sill outer panel and a sill inner panel are joined to form a side sill with a closed cross section that extends in the longitudinal direction of the vehicle body. , the lower part of the center pillar outer panel is joined to the sill outer panel, the lower part of the center pillar inner panel is joined to the sill inner panel, and a first reinforcement extending in the longitudinal direction of the vehicle is provided on the interior side of the sill outer panel. In a lower end structure of a center pillar of an automobile, in which a second reinforcement in the form of a partition wall is joined to the first reinforcement along the vehicle width direction,
A lower end structure of a center pillar for an automobile, characterized in that the center pillar inner panel is extended to the lower end of the sill inner panel and joined to the inner surface of the sill inner panel, and also joined to the partition wall-like second reinforcement. .