JPH0248295Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to an upper body structure of an automobile.

[Prior Art] Generally, a front pillar, a front header, and a roof rail are connected in a three-pronged manner at a corner portion of the upper part of an automobile on the front side of the vehicle body.

However, when the front header vibrates due to lateral shaking of the vehicle body while the vehicle is running, a load is applied to the base of the front header, which may cause the base to deform. Additionally, most of this load is transmitted to the corner portion of the roof panel that is joined to the front pillar, and as a result, there is also the problem that peeling of the roof panel and cracking of the sealer are likely to occur at the roof panel joining line of the front pillar. Ta.

Therefore, as shown in Fig. 6, the front pillar 2
A bifurcated arm is provided at the upper end of the front header 22 and the base of the roof rail 23, and a joint 24, 2 is provided at the end of the arm to close the closed cross section of the arm.
5 has been proposed to improve the strength of the joint (see Japanese Utility Model Application No. 56-155975).

However, with such a joint structure, although the first problem that the base of the front header 22 is easily deformed can be almost solved, the second problem is that peeling, sealer cracking, etc. are likely to occur at the roof panel joining line of the front pillar. points cannot be resolved.

[Purpose of the invention] The present invention was created in view of the above-mentioned problems, and aims to prevent deformation of the base of the header and reduce peeling and cracking of the sealer at the roof joining line of the pillar. .

[Structure of the invention] Therefore, the upper body structure of an automobile according to the invention includes, in the three-pronged part of the upper part of the car body where the pillar, header and roof rail are connected, a node that forms a node that closes the closed cross section of the base of the header. a second reinforcing member having joint portions on which the first reinforcing member is joined and joined to the pillar, the header, and the roof rail, respectively, the pillar of the second reinforcing member; The joint portion is joined to the pillar below the roof joining line of the pillar.

[Effects of the invention] According to the invention, the first reinforcing member improves the rigidity of the header root, thereby preventing deformation of the root, and the second reinforcing member increases the rigidity of the header root. The applied load can be distributed within the pillar by bypassing the roof joining line of the pillar, thereby reducing the load applied to the roof joining line of the pillar, thereby reducing peeling of the roof panel at the pillar, cracking of the sealer, etc. It becomes possible.

[Example] Next, one embodiment of the present invention will be described.

That is, as shown in FIG.
An extension portion 5 (see FIG. 5) is formed that extends diagonally downward along the front pillar 4 forming the side frame of the windshield 3.

As shown in FIG. 1, at the corner A, there are three front pillars 4, a front header 6 extending in the vehicle width direction and forming the upper frame of the windshield 3, and a roof rail 10 extending in the longitudinal direction of the vehicle body. They are connected in a forked shape. Although not shown in FIG. 1, the front edge of the roof panel 2 is connected to the upper surface of the front header 6, and the side edge thereof is connected to the upper surface of the roof rail 10, and the extension 5 is connected to the front pillar 4. It extends downward along the upper outer surface of and is joined to the front pillar 4 at a joining line B-B.

As shown in FIG. 2, the front pillar 4 is formed of a pillar outer 11 and a pillar inner 12, and the front header 6 is formed of a header outer 13 and a header inner 14, each of which has a closed cross section.

And the front pillar 4 in the above trifurcated part
First and second reinforcing members 15, 16 as shown in FIGS. 3a to 3c are inserted into the hollow interior of the front header 6, and these reinforcing members 15,
16 connects the base 6a of the front header 6.
deformation, peeling of the extension portion 5 of the roof panel 2 at the joining line B-B, and cracking of the sealer are prevented.

The first reinforcing member 15 includes two reinforcing members 1
7 and 18, one of which, the reinforcing member 17, is attached to the base 6a of the front header 6.
is located within a closed cross section at . In the reinforcing member 17, the upper folded part 17a is overlapped with the inner end of the curved part 18a of the other reinforcing member 18 which curves along the pillar outer 11, and the welding point W1
At the same time, the lower folded portion 17b is spot welded to the header inner 14 at the welding point W2 to form a knot in the front header 6.

Further, the second reinforcing member 16 has a long front-to-back width;
Therefore, it is formed to be relatively flexible, and the central body portion 16a is disposed below the curved portion 18a of the reinforcing member 18. The inner end of the body part 16a is overlapped with the folded part 17b of the reinforcing member 17, and is connected to the pillar inner 12 at the welding point W2, and the outer end is overlapped with the folded part 17b of the reinforcing member 17 at the welding point W4. They are each spot welded to the pillar outer 11. Therefore, the reinforcing member 17, the body portion 16a of the second reinforcing member 16, and the curved portion 18a of the reinforcing member 18 form another closed cross section within the front pillar 4.

One arm portion 16b of the second reinforcing member 16 extends downward within the front pillar 4, and the flange portions 19 and 20 bent inward below the joining line B-B of the roof panel 2 are connected to the pillar outer. 11
are spot welded at welding points W5 and W6, respectively.

Further, the other arm portion 16c of the second reinforcing member 16 is overlapped with the roof rail 10 and extends rearward,
It is spot welded to the roof rail 1 at welding point W7. Furthermore, the rising portion 16 of the second reinforcing member 16
d is spot welded to both the header outer 13 and the roof rail 10.

The reinforcing member 18 constituting the first reinforcing member 15 has joint parts 18b and 18c on both sides of the curved part 18a, which are engaged with the body part 16a of the second reinforcing member 16, and the joint parts 18b and 18c are Welding points W8, W9
It is spot welded to the body portion 16a.

As described above, in this embodiment, the first reinforcing member 1
Since the rigidity of the root portion 6a of the front header 6 is improved by one reinforcing member 17 forming the first reinforcing member 5, deformation of the root portion 6a can be prevented, and the load applied to the root portion 6a is transferred to the first reinforcing member 17. 15 and the arm portion 16b of the second reinforcing member 16, the joining line B-B of the extension portion 5 of the roof panel 2 is bypassed and the front pillar 4 is
Since the load is transmitted to the lower part of the front pillar 4 and distributed within the front pillar 4, the load transmitted from the base 6a of the front header 6 to the joining line B-B is significantly reduced, and the load transmitted to the extension part at the joining line B-B is greatly reduced. 5
Peeling of the sealant, cracking of the sealer, etc. can be effectively prevented.

Furthermore, since the second reinforcing member 16 is also connected to the roof rail 10, the load applied to the root portion 6a of the front header 6 is transferred to the first and second reinforcing members 1.
5, 16 to the roof rail 10 side, thereby connecting the joining line B-B.
Peeling of the roof panel 2 in , etc. becomes even more difficult to occur.

The above explanation applies to corner A on the front right side of the vehicle.
However, it goes without saying that similar reinforcing structures can be adopted for other corners as well. Moreover, both reinforcing members 1 forming the first reinforcing member 15
7 and 18 may be integrally molded.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the upper body structure of an automobile according to the present invention, Fig. 2 is an enlarged schematic cross-sectional view taken along line C-C in Fig. 1, and Figs. 3a to 3c are perspective views of reinforcing members. 4 is a perspective view of an automobile, FIG. 5 is a perspective view of a roof panel, and FIG. 6 is a perspective view of a conventional example. 4... Pillar, 6... Header, 6a... Root portion, 10... Roof rail, 15... First reinforcing member, 16... Second reinforcing member.

Claims (1)

[Claims for Utility Model Registration] In the three-pronged portion of the upper part of the vehicle body where the pillar, header and roof rail are connected, a first reinforcing member forming a node that closes the closed cross section of the base of the header; a second reinforcing member having a reinforcing member joined thereon and having joining parts joined to the pillar, the header, and the roof rail, respectively, and the joining part of the second reinforcing member joined to the pillar is connected to the pillar. An upper body structure of an automobile characterized by being joined to a pillar below the roof joining line.