JP3309608B2 - Car body structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body structure, and more particularly to a structure of a connecting portion between a rear pillar and a roof side rail of a wagon vehicle.

[0002]

FIG. 5 shows a wagon vehicle to which the present invention is applied. A rear pillar inner 2 and a rear roof side rail inner 3 are integrally formed on a rear side inner panel 1, while a rear fender 4 is formed on a rear fender 4. Rear pillar outer 5
The rear pillar inner 2 and the rear pillar outer 5 are overlapped when the rear side inner panel 1 and the rear fender 4 are joined, and the rear roof side rail inner 3 and the rear roof are integrally formed. The side rail outer 6 is superimposed and joined by spot welding, so that the rear pillar 7 having a closed cross section and the rear roof side rail 8 are connected to each other.

A roof side rail 11 formed in a closed cross section by a roof side rail inner 9 and a roof side rail outer 10 is connected to the front end of the upper end of the rear pillar 7, and the roof side rail 11 is closed by a rear roof. Continue to the closed section of the side rail 8 and the rear pillar 7,
Strength and rigidity are ensured by connecting the frame members together.

Here, as for the connection between the rear pillar outer 5 and the roof side rail outer 10, conventionally, the rear end of the roof side rail outer 10 is over the upper end of the rear pillar outer 5 as shown in FIG. Lapping and brazing the joint between the lower end of the roof side rail outer 10 and the rear pillar outer 5
To join.

A work hole 13 for inserting a jig is formed at the upper end of the rear pillar inner 2 so that the jig 14 can be brought into contact with the back side of the joint at the time of brazing.

Further, a pillar reinforce 12 which forms a closed section between the rear pillar inner 2 and the rear pillar inner 2 is joined to the inner surface of the rear pillar inner 2 in order to increase the rigidity of the pillar. Since the work hole 13 is opened at the upper end of the work hole 13, the work hole 13 is kept at a position below the work hole 13.

In the figure, reference numeral 15 denotes a roof panel, 16 denotes a center pillar, 17 denotes a front pillar, and 18 denotes a side sill.

This similar structure is disclosed, for example, in Japanese Utility Model Laid-Open No. 2-143.
No. 370.

[0009]

Unlike a sedan type vehicle, a wagon vehicle does not have a rear parcel panel serving as a strength member in the vehicle width direction at the rear waist, so that the rear pillar 7 and the roof side rail 11 are connected at the time of a rear collision. There is a tendency that the load tends to concentrate on the portion.

However, if a work hole 13 having a relatively large opening area for inserting a brazing jig is provided at the upper end of the rear pillar inner 2 as in the prior art,
Since the strength and rigidity of the upper end of the pillar are reduced, and the upper end of the pillar reinforce 12 is kept below the work hole 13 with the opening of the work hole 13, the rear pillar 7 is formed by the pillar reinforce 12. In order to sufficiently counter the collision load at the connection between the rear pillar 7 and the roof side rail 11 in the event of a rear collision of the vehicle, the thickness of each of the component panels must be increased. The result is that the weight of the vehicle increases.

Therefore, the present invention can remarkably increase the strength and rigidity of the connection portion between the rear pillar and the roof side rail without increasing the thickness of each component panel, and the rear pillar falls forward when a rear collision of the vehicle occurs. An object of the present invention is to provide a vehicle body structure of an automobile capable of suppressing deformation and further improving safety.

[0012]

According to the first aspect of the present invention, a rear pillar outer and a rear roof side rail outer of a rear fender are joined to a rear pillar inner and a rear roof side rail inner of a rear side inner panel. a rear roof side rail consecutively provided, and, while bonding the pillar reinforcement full Orth forming a closed cross section between the rear pillar inner to the rear pillar inner, a roof side rail inner and a roof side rail a
A roof side rail having a closed cross section formed by bonding the outer side rail and the rear pillar to a closed cross section of the rear roof side rail and the rear pillar. Then, the upper end of the pillar reinforce is extended and joined to the upper end of the rear pillar inner to close the rear pillar inner.
While extending the surface to the upper end of the rear pillar inner ,
The over from the front end of the upper end portion of the rear pillar inner to the rear roof side rail inner, these roof side rails Lee
, Rear pillar inner and rear roof side lay
A roof rail reinforce that forms a closed cross section with the ruiner is joined, and the roof rail reinforce is joined to the upper surface of an extension of the pillar reinforce .

According to a second aspect, the rear end of the roof rail reinforce according to the first aspect is bent and formed toward the inner side of the rear roof side rail and is joined to the inner surface of the rear roof side rail. It is characterized by having a supporting leg piece.

[0014]

SUMMARY OF According to claim 1, which extended portion of the pillar reinforcement is joined disposed at an upper end portion of the rear pillar inner
The closed cross-section formed by
And the roof side rails, the rear roof side rails and the upper end of the rear pillars have a roof section rail inner and rear pillars.
A roof rail reinforce , which forms a closed cross section between the inner and the rear roof side rail inner , is joined and disposed in the front-rear direction, and the roof rail reinforce intersects with an extension of the pillar reinforce. Is joined to the upper surface of the vehicle, the rigidity of the connection between the rear pillar and the roof side rail and the buckling strength of the roof side rail in the front-rear direction are increased, and the strength rigidity of the collective portion of the closed cross-sections is significantly increased. In the event of a rear collision, the rear pillar is restrained from falling forward.

According to the present invention, the support leg at the rear end of the roof rail reinforce is joined to the inner surface of the rear roof side rail, and the pillar rail reinforce and the rear roof side rail inner are formed from the center part of the roof rail reinforce to the rear end. In general, the torsional rigidity of the roof rail reinforce is increased, thereby increasing the torsional rigidity of the aggregated portion of the closed cross-sections, thereby further increasing the strength and rigidity of the aggregated portion. it can.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, in which the same reference numerals are given to the same parts as in the above-mentioned conventional structure.

1 to 4, reference numeral 1 denotes a rear fender in which a rear pillar inner 2 and a rear roof side rail inner 3 are integrally formed, and 4 denotes a rear fender in which a rear pillar outer 5 and a rear roof side rail outer 6 are integrally formed. When the rear side inner panel 1 and the rear fender 4 are joined, the rear pillar inner 2 and the rear pillar outer 5 and the rear roof side rail inner 3 and the rear roof side rail outer 6 are spotted by overlapping the peripheral flanges 1a and 4a. The rear pillar 7 and the rear roof side rail 8 having a closed section are joined by welding.
And are connected continuously.

Reference numeral 12 denotes a pillar reinforce having a substantially L-shaped cross section. The front edge flange 12a is joined to the central portion of the inner surface of the rear pillar inner by spot welding, and the rear edge of the rear pillar inner is the rear edge of the rear pillar inner 2. Flange 1a
To the rear pillar inner 2 by spot welding.
Form a closed cross section between them.

The pillar reinforcement 12 extends to the upper end side of the rear pillar inner 2, and the flange 12a at the upper end of the extended portion 12A is connected to the inner side surface of the rear pillar inner 2 and the flange 1a at the upper edge thereof. The closed cross section is extended to the upper end of the rear pillar inner 2 by joining by spot welding.

The roof side rail 11 which forms a closed cross section by the roof side rail inner 9 and the roof side rail outer 10 has the rear end of the roof side rail inner 9 overlapped with the front end of the upper end of the rear pillar inner 2 from the indoor side. In addition to joining by spot welding, the rear end of the roof side rail outer 10 is overlapped with the front end of the upper end of the rear pillar outer 5 from outside the vehicle, and joined by spot welding.
The closed cross section of the roof side rail 11 is continuous with the closed cross sections of the rear pillar 7 and the rear roof side rail 8.

From the junction between the front end of the upper end of the rear pillar inner 2 and the rear end of the roof side rail inner 9 to the rear roof side rail inner 3, these roof side rail inner 9, rear pillar inner 2, and rear roof A roof rail reinforce 20 forming a closed cross section is joined to the side rail inner 3, and an intermediate portion of the roof rail reinforce 20 overlaps a spot on the upper surface of the extending portion 12 </ b> A of the pillar reinforce 12. Joined by welding.

The upper and lower edges of the roof rail reinforcement 20 are, specifically, between the peripheral flange 1a of the rear side inner panel 1 and the peripheral flange 4a of the rear fender 4, and the upper and lower edges 9a of the roof side rail inner 9. And the upper and lower flanges 10a of the roof side rail outer 10 are joined by spot welding.

At the rear end of the roof rail reinforce 20, a support leg 21 is attached to the rear roof side rail inner 3.
The flange 21a at the end of the supporting leg piece 21 is superposed on the inner surface of the rear roof side rail inner 3 and joined by spot welding.

The roof panel 15 is joined to the upper flanges 4a, 1a of the rear fender 4, the rear side inner panel 1 and the joint of the upper edge flanges 10a, 9a of the roof side rail outer 10 and the roof side rail inner 9. , The flanges 15a on the side edges are overlapped and joined by spot welding.

According to the structure of the embodiment described above, since the rear parcel panel does not exist at the time of the rear collision of the vehicle, the load concentrates on the gathering portion of the closed cross sections of the rear pillar 7, the rear roof side rail 8, and the roof side rail 11. Tend to be.

However, the extending portion 12A of the pillar reinforce 12 is joined to the upper end of the rear pillar inner 2, so that the rear pillar inner 2 and the pillar reinforce 12
Is extended to the upper end of the rear pillar inner 2, and the gathered portion of the closed cross sections is formed between the roof side rail inner 9, the rear pillar inner 2, and the rear roof side rail inner 3. A roof rail reinforce 20 that forms a closed cross section is joined and arranged in the front-rear direction.
Is intersected with the extended portion 12A of the pillar reinforcement 12 and is joined to the upper surface of the extended portion 12A, so that the rigidity of the connection between the rear pillar 7 and the roof side rail 11 and the buckling of the roof side rail 11 in the front-rear direction are achieved. The strength is increased, and the strength and rigidity of the gathering portion of the closed cross sections are significantly increased, so that it is possible to sufficiently cope with the load at the time of a rear collision and to suppress the forward deformation of the rear pillar 7 from falling. Can be.

Further, in this embodiment, the support leg 21 at the rear end of the roof rail reinforce 20 is joined to the inner surface of the rear roof side rail 3 as described above, so that the center of the roof rail reinforce 20 is moved from the rear end to the rear end. Since the portion is substantially entirely fixed to the extended portion 12A of the pillar reinforce 12 and the rear roof side rail inner 3, the torsional rigidity of the roof rail reinforce 20 is increased, so that the aggregated portion of the closed cross sections is formed. The torsional stiffness is increased, so that the strength and stiffness of the assembly portion can be further increased.

In the above-described embodiment, the inner panel 9 and the outer panel 10 constituting the roof side rail 11 are shown as separate parts from the rear side inner panel 1 and the rear fender 4, respectively. However, the roof side rail inner 9 and the rear side inner The same effect can be obtained even when one or both of the panel 1, the roof side rail outer 10 and the rear fender are integrated.

[0029]

As described above, according to the present invention, the following effects can be obtained.

According to the first aspect, the extended portion of the pillar reinforce is joined to the upper end of the rear pillar inner, and the closed cross section formed by the rear pillar inner and the pillar reinforce is continuous in the front-rear direction. An extended rear roof side rail and a set of closed cross-sections of the roof side rail, the rear roof side rail, and the upper end of the rear pillar extending to the upper end of the rear pillar inner in a state orthogonal to the roof side rail; In
Roof side rail inner, rear pillar inner, and
A roof rail reinforce that forms a closed cross section between the rear roof side rail inner and the rear roof side rail inner joint is disposed in the front-rear direction. Since the joints are joined, the rigidity of the connection between the rear pillar and the roof side rail and the buckling strength of the roof side rail in the front-rear direction are increased, and the strength rigidity of the aggregate portion of the closed cross sections is significantly increased. In the event of a rear collision, the rear pillar can be prevented from falling forward.

As a result, it is possible to sufficiently secure a living space in the passenger compartment in front of the rear luggage compartment, and it is possible to further enhance safety.

According to the second aspect, the support leg at the rear end of the roof rail reinforce is joined to the inner surface of the rear roof side rail, and the pillar rail reinforce and the rear roof side rail extend from the center to the rear end of the roof rail reinforce. Because the torsion stiffness of the roof rail reinforce is increased to almost entirely fix to the inner, the torsional stiffness of the above-mentioned aggregate portion of the closed cross section is increased,
Thus, the strength and rigidity of the assembly portion can be further increased.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a main part of an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

FIG. 3 is a sectional view taken along the line BB of FIG. 1;

FIG. 4 is a sectional view taken along the line CC of FIG. 1;

FIG. 5 is a perspective view of a wagon vehicle to which the present invention is applied.

FIG. 6 is a sectional view similar to FIG. 2, showing a conventional structure.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Rear side inner panel 2 Rear pillar inner 3 Rear roof side rail inner 4 Rear fender 5 Rear pillar outer 6 Rear roof side rail outer 7 Rear pillar 8 Rear roof side rail 9 Roof side rail inner 10 Roof side rail outer 11 Roof side rail 12 Pillar reinforcement 12A Extension part of pillar reinforce 20 Roof rail reinforce

Claims (2)

(57) [Claims] 1. A rear pillar outer (5) and a rear roof side rail outer (6) of a rear fender (4) are joined to a rear pillar inner (2) and a rear roof side rail inner (3) of a rear side inner panel (1). A rear pillar (7) having a closed cross section and a rear roof side rail (8) are connected to each other, and the rear pillar inner (2) is provided.
A pillar reinforcement (12) that forms a closed cross section with the rear pillar inner (2) is joined to the rear pillar inner (2), and a roof side rail inner (9) and a roof side rail outer (10) are joined. A roof side rail (11) having a closed cross section is extended from the front end of the upper end of the rear pillar (7), and the closed cross section of the roof side rail (11) is changed to the closed cross section of the rear roof side rail (8) and the rear pillar (7). A pillar structure.
The upper end of the base (12) is extended to
The rear pillar inner (2) is joined to the upper end of (2).
Is extended to the upper end of the rear pillar inner (2) , and the roof side rail inner extends from the front end of the upper end of the rear pillar inner (2) to the rear roof side rail inner (3). A roof rail reinforce (20) forming a closed section is joined between the (9), the rear pillar inner (2) and the rear roof side rail inner (3), and the roof rail reinforce (20) is connected to the pillar reinforce ( A vehicle body structure for an automobile, wherein the vehicle body structure is joined to the upper surface of the extension (12A) of (12). 2. The rear roof inner rail (3) is bent at the rear end of the roof rail reinforcement (20) toward the rear roof side rail inner (3).
2. The vehicle body structure according to claim 1, further comprising a support piece (21) that is joined to the surface by abutment.