JPH08164870A - Car body structure of automobile - Google Patents

Abstract

PURPOSE: To secure a passenger room accommodation space by restraining frontward falling deformation of a rear pillar at the time of rear face collision of a wagon car. CONSTITUTION: An extended part 12A is jointed to an upper end part of a rear pillar inner 2 by extending an upper end part of a pillar reinforce 12 forming a closed section as it is jointed to an inside surface of the rear pillar inner 2, and a roof rail reinforce 20 forming a closed section between a roof side rail inner 9, the rear pillar inner 2 and a rear roof side rail inner 3 is jointed along the rear roof side rail inner 3 from a joint part of a front end of an upper end part of the rear pillar inner 2 and a rear end of the roof side rail inner 9. Additionally, the roof rail reinforce 20 is jointed to an upper surface of the extended part 12A of the pillar reinforce 12.

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 of an automobile, and more particularly to a structure of a connecting portion between a rear pillar and a roof side rail of a wagon vehicle.

[0002]

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

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

Here, regarding the connection between the rear pillar outer 5 and the roof side rail outer 10, conventionally, as shown in FIG. 6, the rear end of the roof side rail outer 10 is overlaid on the upper end of the rear pillar outer 5. After wrapping, the joint between the lower end of the roof side rail outer 10 and the rear pillar outer 5 is brazed.
I am trying to join by.

A working hole 13 for inserting a jig is formed at the upper end of the rear pillar inner 2 so that the jig 14 is brought into contact with the back side of the seam portion during brazing.

A pillar reinforcement 12, which forms a closed cross-section with the rear pillar inner 2, is joined to the inner surface of the rear pillar inner 2 to increase the pillar rigidity. The upper end of the pillar reinforcement 2 is joined to the pillar inner force 2. 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, 15 is a roof panel, 16 is a center pillar, 17 is a front pillar, and 18 is a side sill.

[0008] This similar structure is, for example, the actual Kaihei 2-143.
It is shown in Japanese Patent No. 370.

[0009]

Unlike a sedan type vehicle, since a wagon vehicle does not have a rear parcel panel which serves as a strength member in the vehicle width direction of the rear waist, the rear pillar 7 and the roof side rail 11 are connected in the case of a rear collision. The load tends to concentrate on the part.

However, if a working hole 13 having a relatively large opening area is provided at the upper end portion of the rear pillar inner 2 for inserting a brazing jig as in the conventional case, the rear pillar 7 will be formed.
Since the strength and rigidity of the upper end portion of the pillar reinforcer 12 is lowered, and the upper end of the pillar reinforcement 12 is kept at the lower position of the work hole 13 with the opening of the work hole 13, the rear reinforcement 7 of the pillar 7 is prevented. In order to sufficiently counter the collision load at the connecting portion between the rear pillar 7 and the roof side rail 11 at the time of the rear surface collision of the vehicle, the reinforcing effect of the upper end portion is thin, and the plate thickness of each constituent panel is increased greatly. This results in increased vehicle weight.

Therefore, according to the present invention, the strength and rigidity of the connecting portion between the rear pillar and the roof side rail can be remarkably increased without increasing the plate thickness of each constituent panel, and the rear pillar can be tilted forward when a rear collision of the vehicle occurs. The present invention provides a vehicle body structure capable of suppressing deformation and further improving safety.

[0012]

According to a first aspect of the present invention, a rear pillar inner and a rear roof side rail inner of a rear side inner panel are joined to a rear pillar outer of a rear fender and a rear roof side rail outer to form a rear pillar having a closed cross section. While connecting a rear roof side rail and a pillar reinforce forming a closed cross section between the rear pillar inner and the rear pillar inner, the roof side rail having the closed cross section is formed from the front end of the rear pillar upper end. A structure in which the closed cross section of the roof side rail is continuous with the closed cross sections of the rear roof side rail and the rear pillar, and the upper end of the pillar reinforcement is extended and joined to the upper end of the rear pillar inner. The rear roof side rail in from the front end of the upper end of the rear pillar inner. A roof rail reinforcement forming a closed cross section is joined between the roof side rail, the rear pillar, and the rear roof side rail, and the roof rail reinforcement is joined to the upper surface of the extending portion of the pillar reinforcement. It is characterized by that.

According to a second aspect of the present invention, the rear end of the roof rail reinforcement according to the first aspect is bent and formed toward the rear roof side rail inner surface, and is abutted and joined to the rear roof side rail inner surface. It is characterized by the provision of supporting legs.

[0014]

According to the present invention, the extending portion of the pillar reinforcement is joined to the upper end portion of the rear pillar inner member, and the roof side rail, the rear roof side rail and the upper end portion of the rear pillar are assembled into a closed cross section. In part,
The roof side rail, the rear pillar, and a roof rail reinforcement forming a closed cross section between the roof side rail and the rear roof side rail are jointly arranged in the front-rear direction, and the roof rail reinforcement crosses the extension portion of the pillar reinforcement. Since it is joined to the upper surface of the extended portion, the joint rigidity 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 and rigidity of the gathered portion of the closed cross sections are significantly increased. The
The forward deformation of the rear pillar is suppressed when the rear surface collision of the vehicle occurs.

According to the second aspect of the present invention, the supporting leg piece at the rear end of the roof rail reinforcement is joined to the rear roof side rail inner surface, and the rear end portion from the central portion of the roof rail reinforcement to the pillar reinforcement and the rear roof side rail inner surface. Since the roof rail reinforcement is substantially entirely fixed to the above, the torsional rigidity of the roof rail reinforcement is increased, so that the torsional rigidity of the aggregated portion of the closed cross sections is enhanced, and thus the strength and rigidity of the aggregated portion can be further enhanced. 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 by assigning the same reference numerals to the same parts as those in the conventional structure.

1 to 4, 1 is a rear side inner panel in which a rear pillar inner 2 and a rear roof side rail inner 3 are integrally formed, and 4 is a rear fender in which a rear pillar outer 5 and a rear roof side rail outer 6 are integrally formed. When joining the rear side inner panel 1 and the rear fender 4, 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 superimposing the peripheral flanges 1a and 4a. The rear pillar 7 and the rear roof side rail 8 having a closed cross section are joined by welding.
And are connected in series.

Reference numeral 12 is a pillar reinforcement formed in a substantially L-shaped cross section. The front edge flange 12a is spot welded to the central portion of the inner surface of the rear pillar inner, and the rear edge of the rear pillar inner 2 is formed. Flange 1a
To the rear pillar inner 2 by spot welding.
A closed cross section is formed between and.

The pillar reinforcement 12 is extended 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 formed on the inner surface of the rear pillar inner 2 and the flange 1a at its upper edge. By joining by spot welding, the closed cross section is extended to the upper end of the rear pillar inner 2.

The roof side rail inner 9 and the roof side rail outer 10 form a closed cross section. The roof side rail 11 is formed by superimposing the rear end of the roof side rail inner 9 on the front end of the upper end of the rear pillar inner 2 from the inside. And by spot welding, the rear end of the roof side rail outer 10 is superposed on the front end of the upper end of the rear pillar outer 5 from the outside of the vehicle to be 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.

The roof side rail inner 9, the rear pillar inner 2, and the rear roof extend from the joint 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. A roof rail reinforcement 20 forming a closed cross section is joined to the side rail inner 3 and an intermediate portion of the roof rail reinforcement 20 is superposed on the upper surface of the extending portion 12A of the pillar reinforcement 12 and spotted. It is 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 edge flanges 9a of the roof side rail inner 9. And the flanges 10a at the upper and lower edges of the roof side rail outer 10 are sandwiched and joined by spot welding.

At the rear end of the roof rail reinforcement 20, a support leg piece 21 is provided toward the rear roof side rail inner 3.
Is bent, and 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 formed by joining the flanges 4a, 1a at the upper edges of the rear fender 4 and the rear side inner panel 1 and the flanges 10a, 9a at the upper edges of the roof side rail outer 10 and the roof side rail inner 9. The flanges 15a on the side edges are overlapped with each other and joined by spot welding.

According to the structure of the above embodiment, since the rear parcel panel does not exist at the time of a rear collision of the vehicle, the load is concentrated on the gathered portion of the rear pillars 7, the rear roof side rails 8, and the roof side rails 11 of the closed cross section. Tend to do.

However, the extending portion 12A of the pillar reinforcement 12 is joined to the upper end portion of the rear pillar inner 2 so that the rear pillar inner 2 and the pillar reinforcement 12 are joined together.
The closed cross section formed by and extends to the upper end of the rear pillar inner 2, and at the gathering portion of the closed cross sections, the roof side rail inner 9, the rear pillar inner 2, and the rear roof side rail inner 3 are formed. A roof rail reinforcement 20 that forms a closed cross section is joined and arranged in the front-rear direction.
Is joined to the upper surface of the extended portion 12A by intersecting the extended portion 12A of the pillar reinforcement 12, and therefore the joint rigidity 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. The strength is increased, and the strength and rigidity of the gathered portion of the closed cross-sections are significantly increased, and thus, the load at the time of a rear-end collision can be sufficiently counteracted and the forward deformation of the rear pillar 7 can be suppressed. You can

Further, in the present embodiment, as described above, the supporting leg piece 21 at the rear end of the roof rail reinforcement 20 is joined to the three surfaces of the rear roof side rail inner so that the rear end of the roof rail reinforcement 20 extends from the central portion thereof. Since the portion is fixed almost entirely to the extended portion 12A of the pillar reinforcement 12 and the rear roof side rail inner 3, the torsional rigidity of the roof rail reinforcement 20 is increased, and thus the gathered portion of the closed cross sections is The torsional rigidity is enhanced, and thus the strength and rigidity of the gathered portion can be further enhanced.

Although the inner panel 9 and the outer panel 10 constituting the roof side rail 11 are separate parts from the rear side inner panel 1 and the rear fender 4, respectively, in the above embodiment, the roof side rail inner 9 and the rear side inner are illustrated. The same effect can be obtained even if 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 extending portion of the pillar reinforcement 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 reinforcement is continuous in the front-rear direction. An extending rear roof side rail and an extending portion extending to the upper end portion of the rear pillar inner in a state of being orthogonal to the roof side rail, and a closed cross section of the roof side rail and the rear roof side rail and the upper end portion of the rear pillar. Has
The roof side rail, the rear pillar, and a roof rail reinforcement forming a closed cross section between the roof side rail and the rear roof side rail are jointly arranged in the front-rear direction, and the roof rail reinforcement crosses the extension portion of the pillar reinforcement. Since it is joined to the upper surface of the extended portion, the joint rigidity 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 and rigidity of the gathered portion of the closed cross sections are significantly increased. The
As a result, it is possible to prevent the rear pillar from being tilted and deformed in the forward direction at the time of a rear surface collision of the vehicle.

As a result, the living space in the passenger compartment in front of the rear luggage compartment can be sufficiently secured, and the safety can be further enhanced.

According to the second aspect of the present invention, the supporting leg pieces at the rear end of the roof rail reinforcement are joined to the inner surface of the rear roof side rail, and the rear end portion from the central portion of the roof rail reinforcement is connected to the pillar reinforcement and the rear roof side rail. Since the roof rail reinforcement is substantially entirely fixed to the inner member, the torsional rigidity of the roof rail reinforcement is increased, thereby increasing the torsional rigidity of the gathered portion of the above-mentioned closed cross-sections.
As a result, the strength and rigidity of the gathered portion can be further enhanced.

[Brief description of 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 cross-sectional view taken along the line CC of FIG.

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]

 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 Rain Force 12A Pillar reinforce extension 20 Roof rail reinforce

Claims (2)

[Claims] 1. A rear pillar inner and a rear roof side rail inner of a rear side inner panel are joined to a rear pillar outer and a rear roof side rail outer of a rear fender to connect a rear pillar and a rear roof side rail having a closed cross section, and While the pillar pillar reinforcement forming a closed cross section between the rear pillar inner and the rear pillar inner is joined to the rear pillar inner, the roof side rail having the closed cross section is extended from the front end of the rear pillar upper end to form the closed cross section of the roof side rail. The structure is continuous to the closed cross section of the rear roof side rail and the rear pillar, the upper end of the rear pillar reinforcement is extended and joined to the upper end of the rear pillar inner, and from the front end of the upper end of the rear pillar inner. These roof side rails extend across the rear roof side rail inner. Of the vehicle, characterized in that a roof rail reinforcement forming a closed cross-section is joined between the rail, the rear pillar, and the rear roof side rail, and the roof rail reinforcement is joined to the upper surface of the extending portion of the pillar reinforcement. Body structure. 2. A bent portion is formed at the rear end of the roof rail reinforcement toward the rear roof side rail inner,
2. The vehicle body structure for an automobile according to claim 1, wherein a supporting leg piece is provided which is abutted against and joined to the inner surface of the rear roof side rail.