JPS6019018Y2 - Center pillar upper joint structure - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a center pillar upper joining structure for welding the upper part of the center pillar of an automobile body to a drip flange of a roof panel.

In a typical automobile body structure, the projecting outer surface of the upper end of the center pillar outer is usually configured to abut against the drip channel portion.

That is, the upper end of the pillar outer is usually formed so that its cross section widens into a T-shape, and the widened portion forms a joint surface portion for joining with the drip channel portion.

However, since the welding points for joining the center pillar outer to the drip channel part are limited to the joint surfaces just at both ends of the T-shaped part, it is difficult to increase the joint strength at the upper end of the center pillar outer. This has the disadvantage that it becomes difficult to obtain sufficient joint rigidity, and that deformation and cracks are likely to occur in the joint portion of the upper portion of the pillar outer.

The present invention has been devised in view of the above-mentioned problems, and an object of the present invention is to obtain a structure that can increase the bonding strength of the center pillar outer to the drip channel portion.

Therefore, in the present invention, a part of the side roof rail is folded inward to form a folded part, and the folded part is set shorter than the upper end length of the center pillar outer to connect both ends of the T-shaped part of the center pillar outer to the reinforcing panel. The folded part is combined with the reinforcing panel to form a closed cross-sectional structure, and the flange part on the outer edge of the side roof rail is connected to the flange part formed on the reinforcing panel and the center. These three parts are joined by sandwiching the flange part at the upper end of the pillar outer, and the flange part, which is overhang-molded on the reinforcing panel existing in the section of the folded part, connects the same flange part to the drip flange of the roof panel and the center pillar outer. The gist is that these three parts are connected to each other by being sandwiched between the above-mentioned flange part at the upper end, and with this structure, the part where the flange part at the upper end of the center pillar outer cannot be welded to the drip flange part can be folded back on the side roof rail. The reinforcing panel can be joined to the folded part by using the folded part, and the closed cross section formed between the two can secure strength and rigidity while welding the side roof rail and center pillar outer at both ends of the reinforcing panel. Since the pillar mounting part has a structure that is less susceptible to stress concentration, it is possible to increase the joint rigidity of the center pillar, and furthermore, the mounting is possible to prevent deformation of the part. It has a practical effect of effectively preventing the occurrence of cracks and improving the durability of the car body.

Hereinafter, the present invention will be explained based on an illustrated embodiment.

Fig. 1 is an external view of the left center pillar upper part 1 of the passenger car body.
5, the pillar upper part 1 is connected indirectly to the roof panel 2, and directly to the side roof rail 3 and its reinforcing panel 4, which are welded to the roof panel 2. At the same time, the center pillar as a whole is indirectly connected to the two members 3 and 4 through the center pillar inner 5 and its reinforcement reinforcement. A detailed description will be given with reference to FIGS. 4 to 6 (front sectional view).

First, a drip flange 2a protrudes from the side edge of the roof panel 2, and the lower surface of the flange 2a has a flange portion 3a on the outer edge of the side roof rail 3, except for the part that contacts the pillar upper part 1. is welded.

Note that the portion of the pillar that contacts the flange portion 3a is folded back along the lower surface of the roof panel 2 with a dimension set shorter than the length of the flange portion 7b formed at the upper end of the center pillar outer 7, which will be described later. , a folded portion 3b is formed.

Depending on the dimensions of the folded portion 3b, it is possible to connect both ends of the T-shaped top edge that dominates the upper end of the center pillar outer 7 to a reinforcing panel 4, which will be described later.

By being joined to the reinforcing panel 4, the folded portion 3b forms a closed cross section at the upper portion of the pillar outer, as shown in FIG.

Next, within a width slightly wider than the contact area between the roof panel 2 and the side roof rail 3, there are
As shown in the figure, a reinforcing panel 4 having a shape substantially along the lower surface of the roof panel 2 is laid out, and the inner end 4 of the panel 4
a is integrally overlapped with the inner end 3c of the roof panel 3, and the flange portion 4b formed on the outer edge of the reinforcing panel 4 is attached to the drip flange 2a of the roof panel 2 in the section facing the folded portion 3b of the roof rail 3. , are spot welded with one side sandwiched between the flange portions 7b of the center pillar outer 7.

(X mark in FIG. 3) Therefore, the flange portion 4b of the reinforcing panel 4 is connected to the drip flange 2a of the roof rail 2 and the flange portion 7b of the pillar outer 7 while being sandwiched therebetween.

The flange portion 4b of the reinforcing panel 4 other than the section facing the folded portion 3b of the side roof rail 3 is spot-welded with the flange portion 3a of the side roof rail 3 sandwiched between the flange portion 7b of the pillar outer 7.

(X mark in Fig. 3) Furthermore, in the section facing the folded part 3b of the side roof rail 3, the reinforcing panel 4 is spot welded to the folded part 3b, and the flange part 4b itself is as shown in Fig. 6. Recessed flange of pillar outer 7? a (described later) and is arranged in an overlapping state together with the drip flange 2a.

By the way, the pillar outer 7 that forms the outer wall and the side wall of the center pillar upper part 1 has a cylindrical body with a convex cross-section integrally with the pillar inner 5 in its hanging portion to form a door stop. , at its upper end, halves are curved symmetrically toward the front and rear of the vehicle body to form a stepped surface with a stepped cross section, and the developed surface overlaps the outer half of the roof race 3. The brazing parts are connected together, and as described above, the flange part 7b at the top edge of the developed surface is connected to the panel flange part 4b and the roof rail flange part 3a, as shown in FIG.
It is spot welded to the drip flange 2a of the roof panel.

In addition, the upper part of the pillar inner 5 wraps around the back side of the roof rail 3 and is welded to the lower surface of the same rail 3, and the upper part of the reinforcement reinforcement of the pillar inner 5 similarly wraps around the back side of the roof rail 3. After that, its upper end is welded to the inner end 3c of the roof rail.

Incidentally, a window hole 4C of an appropriate shape for inserting a welding jig is cut out in the plate surface of the reinforcing panel 4, and this window hole 4C also serves to reduce the weight of the panel 4.

In the coupling structure of the embodiment configured in this way, the pillar outer 7 of the center pillar upper part 1 is provided in a state in which the upper end flange portion 7b and the recessed flange 7a are directly and closely overlapped. , center pillar upper part 1
The rigidity of the car body connection has been significantly strengthened compared to before, and for this reason, as shown in Figure 7, in the conventional specification of the door stop 8 (shown in the diagram, dashed lines), three locations A, B, and C were welded. Even if the two parts A and C are welded together with the double door stop specification (shown as a solid line in the figure), the strength will be sufficiently compensated.

In addition, in the structure of the embodiment, the portion of the drip flange 2a that is in contact with the pillar is connected to the folded portion 3b of the side roof rail 3.
The advantage is that the sealing properties of the gutter are ensured because it is backed with .

[Brief explanation of the drawing]

Fig. 1 is a perspective view of the upper part of the center pillar, Fig. 2 is a perspective view of the upper coupling structure of the center pillar showing an embodiment of the present invention, and Fig. 3 is an enlarged view of part 2 in Fig. 1. , the separated view of FIG. 2, and FIGS. 4 to 6 are rV-r of FIG. 2, respectively.
Cross-sectional view along V line, V-V line, and ■-■ line, No. 7
The figure is a schematic diagram of the door stop section. 1...Top of center pillar, 2...Roof panel, 2a...Drip flange, 3...
...Side roof rail, 3a... Flange part, 3b... Turned part, 4... Reinforcement panel, 4b... Flange part, 7・・・・・・
... Center pillar outer, 7b... Same flange part.

Claims (1)

[Scope of utility model registration request] In a welding joint structure for joining the upper end of a center pillar outer of an automobile body to a drip flange of a roof panel, the portion of the flange portion of the outer edge of the side roof rail that is in contact with the center pillar is folded inward, and the folded portion is is set shorter than the upper end length of the center pillar outer, and the side roof rail has a reinforcing panel connected between the folded part and the inner end of the side roof rail to form a closed cross-sectional structure. The flange portion of the outer edge is sandwiched and joined by the flange portion formed on the reinforcing panel and the flange portion at the upper end of the center pillar outer, and the flange portion of the reinforcing panel existing in the section of the folded portion is further joined. An upper coupling structure for a center pillar, characterized in that the flange portion is constructed by sandwiching and coupling the flange portion to a drip flange formed on the roof panel and the flange portion at the upper end of the center pillar outer.