JPH0527347Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention relates to a front pillar structure applied to a vehicle, and in particular, it is possible to achieve a high degree of rigidity without using reinforcement panels that are joined for reinforcement. and the front pillar structure that ensures strength.

Conventional technology In conventional vehicles, in order to ensure the rigidity of thin front pillars, a reinforcement panel is joined and reinforced within a closed cross-section structure formed by spot welding the mutual flanges of an outer panel and an inner panel. It had been done.

Hereinafter, referring to the drawings, as shown in Fig. 3, reference numeral 1' denotes a front pillar, and the flange of the front pillar inner panel 3' is joined to the flange of the front pillar outer panel 2' by spot welding, so that a closed cross section is formed. 8' was formed. Inside the closed section 8', reinforcement reinforcements 6' and 7', which were divided into two parts for reasons of joining, were spot welded to the inner surface of the front pillar inner panel 3'.

Problems to be Solved by the Invention Incidentally, as a general means of maintaining appropriate strength and rigidity of the front pillar, it is conceivable to increase the plate thickness of the constituent members. Therefore, in conventional structures, in order to secure the required wall thickness, a structure is adopted in which a reinforcement panel is joined to the inner panel 3', and the required strength and rigidity are obtained by adding the wall thicknesses of both members. I was getting it. However, in order to join the reinforcement panel within the closed cross section 8' of the thin front pillar, the shape and structure of the member becomes complicated and problems such as formability arise, so the reinforcement panel itself must be divided into two parts. ing.
As a result, spot welding of three overlapping members is required, resulting in difficulty in spot welding.

Therefore, the purpose of this invention is to obtain a front pillar structure with strength and rigidity by dividing the front pillar inner panel into two parts in the longitudinal direction and securing the wall thickness by overlapping and joining both parts. .

Means for solving the problems The present invention solves the problems mentioned above.
In a front pillar structure in which mutual flange parts of a front pillar outer panel and a front pillar inner panel are spot welded to form a closed cross section, the front pillar inner panel is divided into two in the longitudinal direction, and the two divided parts are formed into the closed cross section shape. This front pillar structure is characterized by bending and overlapping each other, and joining the overlapping parts by spot welding.

Hereinafter, one embodiment of the present invention will be explained with reference to the drawings. Fig. 1 shows the position of the front pillar in the vehicle body, and Fig. 2 shows the cross-sectional structure of the front pillar (the first
A-A cross section in the figure) is shown.

As shown in FIGS. 1 and 2, the front pillar 1 has a closed cross-sectional structure composed of a front pillar outer panel 2 and a front pillar inner panel 3, and is a member obtained by dividing the front pillar inner panel 3 into two in the longitudinal direction. 3a and 3b are bent and formed to match the cross-sectional shape of the front pillar, and the overlapping joint portion 4 of the two divided portions is overlaid and joined by spot welding portions 5 and 6.

In addition, the above-mentioned front pillar inner panel 3 is
The front pillar outer panel 2 is joined to the flange by spot welding, and the front pillar 1
A closed cross section 8 is formed.

Function Therefore, since the overlapping joint portions 4 of the front pillar inner panel members 3a and 3b which are divided into two parts are overlapped with each other and joined by spot welding, the plate thicknesses of both members are added to form a link. It is possible to obtain the same plate thickness as that obtained by joining forcements. That is, since either one of the overlapping joints 4 of the members 3a and 3b functions as a reinforcement, it is possible to achieve both a simple structure and ensuring strength and rigidity.

Note that even if the front pillar inner panel 3 is divided into two parts, unlike the front pillar outer panel 2 which is exposed to the outside of the vehicle body, the divided part and welded part will not be exposed to the outside because it will be covered with trim etc., and the appearance will be spoiled. Not at all.

Effects of the invention As a result of the above, according to the invention, the inner panel members, which are divided into two parts and formed into a closed cross-sectional shape, are overlapped and the overlapping joints are joined by spot welding, which improves strength and rigidity. When it comes to securing, it is possible to consider adding the plate thicknesses of both members. In other words, even if you omit the reinforcement panel altogether, one member of the polymerized joint functions in the same way as the reinforcement panel, so you can obtain the same rigidity and strength as if the reinforcement reinforcement panels were joined together. become. Therefore, the structure of the front pillar can be simplified, reducing the number of parts and improving the formability of the constituent parts by simplifying the shape.
Furthermore, effects such as improved weldability due to a reduction in the number of welded parts can be obtained.

Furthermore, by omitting the reinforcement panel, the weight of the vehicle can be reduced.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the position of a front pillar in a vehicle body. Figure 2 is a sectional view of a front pillar structure showing an embodiment of the present invention, and
-A cross section is shown. FIG. 3 is a sectional view of a conventional front pillar structure. 1, 1'... Front pillar, 2, 2'... Outer panel, 3, 3'... Inner panel, 3a, 3
b...Member, 4...Polymerized joint, 5, 6...Spot weld, 8, 8'...Closed cross section.

Claims (1)

[Scope of utility model registration request] In a front pillar structure in which mutual flange parts of a front pillar outer panel and a front pillar inner panel are spot welded to form a closed cross section, the front pillar inner panel is divided into two in the longitudinal direction, and the two divided parts are formed into the closed cross section shape. 1. A front pillar structure characterized in that the pillars are bent and overlapped, and the overlapping parts are joined by spot welding.