JPH11321706A - Car body rear part structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve torsional rigidity and bending rigidity in a car body rear part by increasing connection rigidity between a back pillar and a rear roof rail. SOLUTION: An extension part 14 of sectional shape fitted to a rail inner 7 of a rear roof rail 5 is provided in an upper end part of a back pillar inner 11, and an extension part 15 of sectional shape fitted to a rail outer 8 of the rear roof rail 5 is provided in an upper end part of a back pillar reinforce 12, the extension part 14 is connected to an end part of the rail inner 7 and a back pillar 6 is connected to the rear roof rail 5 with each closed section continued by fit-connecting the extension part 15 to an end part of the rail outer 8. This configuration enhances torsional rigidity and bending rigidity in a car body rear part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a vehicle body rear structure.

[0002]

2. Description of the Related Art As a conventional rear body structure of a vehicle, as shown in Japanese Patent Application Laid-Open No. Hei 7-300882, for example, a back pillar inner and a back pillar rain outside the upper end of a back pillar having a closed sectional structure are disclosed. While the force is overlapped with the force to close the closed section, the rail inner and the rail outer are closed at both ends of the rear roof rail of the closed section structure arranged in the vehicle width direction inside the rear end of the roof panel. It is known that the cross section is closed, and the closed end of the rear roof rail is overlapped on the closed end of the back pillar and integrally joined by spot welding.

[0003]

The closed cross section of the back pillar and the closed cross section of the rear roof rail are located at both upper corners where the torsional load and the bending load are concentrated at the rear opening of the vehicle body where the back door and the like are mounted. Are closed in the vertically crushed state and connected in an overlapping manner, so that stress tends to concentrate on the discontinuous portion of the closed cross section, and it is undeniable that the torsional rigidity and bending rigidity of the rear part of the vehicle body decrease. This is because, in a vehicle body to which a back door is attached, the rear opening is large, and thus the vehicle tends to be severe.

Accordingly, the present invention has a simple structure that allows the back pillar and the rear roof rail to be connected in a state in which the closed cross sections are continuous with each other, thereby further increasing the torsional rigidity and the bending rigidity of the rear part of the vehicle body. Provides structure.

[0005]

According to the first aspect of the present invention, an extended portion is formed at the upper end portion of the back pillar inner portion and extends to the rear roof rail side with a cross-sectional shape fitted to the rail inner of the rear roof rail. On the other hand, at the upper end of the back pillar reinforce joined to the outer surface of the back pillar inner, an extended portion extending toward the rear roof rail with a cross-sectional shape fitted to the rail outer of the rear roof rail is formed, and the extension of the back pillar inner is formed. The set end is fitted and connected to the end of the rail inner, the extended end of the back pillar reinforce is fitted and connected to the end of the rail outer, and the back pillar inner and the back pillar reinforce form a closed cross section. A state in which the closed cross-section of the configured back pillar and the rear roof rail configured as a closed cross-section with the rail inner and rail outer are continuous It is characterized in that the connection.

According to a second aspect of the present invention, a rear roof rail reinforce is joined and disposed within an end of the rear roof rail according to the first aspect, and the end is extended between an end of the rail inner and the back pillar inner. While being overlapped and integrally joined to the fitting portion with the end of the set portion, a working hole is formed in the extended portion of the back pillar inner, and the end of the rail outer and the extended portion end of the back pillar reinforce are connected. The part of the rail outer and the extension of the back pillar are offset from the connecting part of the end of the rail inner side to the roof side side, and the end of the rail outer and the extension of the back pillar reinforcement are connected to each other. It is characterized in that the work hole is fastened and fixed by a fastening member.

[0007]

According to the first aspect of the present invention, since the back pillar and the rear roof rail are connected in a state where the closed cross sections are continuous, the rear opening of the vehicle body on which the back door is mounted is provided. It is possible to avoid local concentration of stress on the corners on both sides of the upper part, and it is possible to further increase the torsional rigidity and the bending rigidity of the rear part of the vehicle body.

In addition, a cross-sectional shape in which the extended portion formed at the upper end of the back pillar inner and the extended portion formed at the upper end of the back pillar reinforce are fitted to the corresponding rail inner and rail outer of the rear roof rail. Since it has a simple structure in which it is simply fitted and connected to the ends of the rail inner and the rail outer, it can be advantageously obtained in terms of cost without increasing the number of parts and the number of assembly steps.

According to the second aspect of the present invention, the first aspect is provided.
In addition to the effects of the invention, the rear roof rail reinforce is joined and disposed inside the end of the rear roof rail, so that the rigidity around the connection between the rear roof rail and the back pillar can be increased, as well as the rail inner. After the end and the extension of the back pillar inner are joined and fixed, the end of the rail outer and the extension of the back pillar reinforcement are offset from the rear roof rail reinforcement on the roof side. Can be easily fastened and fixed by a fastening member through a working hole provided in the extension part of the back pillar inner, so that the connection work between the back pillar and the rear roof rail can be improved.

According to the invention described in claim 3, according to claim 2
In addition to the effects of the invention of the above, the end of the roof panel on the roof side side and the upper end of the body side outer wrapped around the roof panel side are overlapped and joined on the extended part surface of the back pillar reinforcement. Therefore, the torsional load and bending load concentrated on both upper corners of the rear opening of the vehicle body can be reduced by connecting the closed cross sections of the back pillar and the rear roof rail rigidly to each other. Therefore, the torsional rigidity and the bending rigidity at the rear portion of the vehicle body can be further increased.

[0011] Further, the end of the roof panel on the roof side and the upper end of the body side outer overlap at an upper portion of a working hole provided in the extension of the back pillar inner. The joining can be easily performed on the extended portion surface of the reinforcement, and the joining workability can be improved.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

FIGS. 1 to 6 show a rear roof rail 5 arranged substantially horizontally at an upper corner C of a rear opening 2 of the vehicle body 1 shown in FIG. A rear roof rail 5 arranged in the vehicle width direction inside the rear end of the roof panel 4 includes a rail inner 7 formed in a substantially hat-shaped cross section and a substantially L-shaped section. It is formed in a closed cross section with the rail outer 8 formed in a V-shaped cross section.

The rail outer 8 has its front edge flange 8a joined to the front edge flange 7a of the rail inner 7 by spot welding, and the rail outer 8 has a rear edge flange 8b.
Are joined to the general surface of the rail inner 7 by spot welding.

The end of the rail outer 8 is formed slightly longer than the end of the rail inner 7, and is offset to the outside in the vehicle width direction (roof side).

A rear roof rail reinforcement 9 for dividing a closed cross section of the rear roof rail 5 into upper and lower portions is provided in the ends of the rail inner 7 and the rail outer 8.

The rear roof rail reinforcement 9 has a front edge flange 9a having a rail inner 7 and a rail outer 8.
Are joined by spot welding between the front edge flanges 7a and 8a, and the rear edge flange 9b is overlapped with the rear edge flange 7b of the rail inner 7 so as to be described later. In addition, they are integrally joined by spot welding to form a beam member that obliquely crosses the closed cross section of the rear roof rail 5 in the front-rear direction.

The rear edge flange 8b of the rail outer 8 is bent up and down at the portion where the rear roof rail reinforce 9 is disposed so as to overlap the rear roof rail reinforce 9 and perform spot welding or the like. A working hole 10 is formed at the end of the rail inner 7.

The roof panel 4 is joined in advance by spot welding the rear edge flange 4a on the rear edge flange 7a of the rail inner 7 constituting the rear roof rail 5 to form a part of the roof module MR. ing.

Further, the outer end of the roof panel 4 in the vehicle width direction is formed to be longer than the end of the rail outer 8 in the vehicle width direction. At this end, a concave side edge flange 4b is formed.

The back pillar 6 is a back pillar inner 11
And a back pillar reinforce 12 joined to the outer surface of the back pillar inner 11 to form a closed cross section,
In this embodiment, the upper end of the back pillar inner 11 is connected to the upper end of the back pillar inner 11 by the rear roof rail 5.
And a roof side rail (not shown).

The upper end of the back pillar inner 11, that is, the upper end of the brace 13, has a substantially hat-shaped cross-sectional shape to be fitted to the rail inner 7 of the rear roof rail 5, and is substantially horizontal to the rear roof rail 5 side. Is formed at the upper end of the back pillar reinforce 12 in a substantially horizontal direction toward the rear roof rail 5 side with a substantially L-shaped cross-sectional shape fitted to the rail outer 8 of the rear roof rail 5. Is formed.

The end of the extension 15 of the back pillar reinforcement 12 is connected to the extension 1 of the back pillar inner 11.
4 is slightly shorter than the end portion and is offset to the outside in the vehicle width direction.

The extension 1 of the back pillar inner 11
4 is formed with a working hole 16 for fastening the end of the rail outer 8 of the rear roof rail 5 and the end of the extending portion 15 of the back pillar reinforce 12.

The back pillar inner 11 and the back pillar reinforce 12 are joined together.
The front pillars 14a, 15a of the extension portions 14, 15 and the rear edge flange 15b of the extension portion 15 and the general surface of the extension portion 14 are joined to form the back pillar 6 having a closed cross section.

The body side outer 21 is formed so as to cover substantially the entire outer side of the back pillar 6 in the vehicle width direction.
However, the lower edge flange 21a is
The upper edge flange 21b, which is recessed at the upper end portion of the side edge flange 11a and which is turned inward in the vehicle width direction, is superimposed on the surface of the extended portion 15 of the back pillar reinforce 12, and is joined by spot welding. And the body side module MS.

When assembling the roof module MR including the rear roof rail 5 and the roof panel 4 with the body side module MS including the back pillar 6, as shown in FIG. 7, the roof module MR is mounted on the body side module MS. Place on.

At this time, each end of the rail inner 7, the rail outer 8, and the roof panel 4 constituting the roof module MR on the outside in the vehicle width direction, and the back pillar inner 11 (the brace 1) constituting the body side module MS.
The end portions 3) of the extension portion 14, the extension portion 15 of the back pillar reinforce 12 and the inner end in the vehicle width direction of the body side outer 21 are offset as described above, so that they do not interfere with each other. The corresponding ends of the modules MR and MS overlap and fit.

Then, the fitted back pillar inner 11
The end portion 14 of the extension portion and the end portion of the rail inner 7 are joined by spot welding via a work hole 16, and the side edge flange 4 b at the end portion of the roof panel 4 is connected to the work of the extension portion 14. The upper portion of the hole 16 overlaps with the upper edge flange 21 b of the body side outer 21, and is joined to the extension portion 15 of the back pillar reinforce 12 through the working hole 16 by spot welding. Further, the outer portion in the vehicle width direction of the rear edge flange 4a of the roof panel 4 is provided with the back pillar inner 1
The two extension portions 14 are overlapped on the rear edge flange 14b and joined by spot welding.

Further, the end of the rail outer 8 and the extension 15 of the back pillar reinforce 12 are passed through a working hole 16 provided in the extension 14 of the back pillar inner 11, for example, as shown in FIGS. Bolt 1 in two places
Each of the rear edge flange 8b and the rear edge flange 15b of the rail outer 8 overlapped on the general surface of the rail inner 7, and each end of the rear edge flange 15b of the extension portion 15 is fixed to the extension portion. Bolt 19 on the general surface of 14,
It is fastened and fixed by the nut 20.

As described above, the end of the extended portion 14 of the back pillar inner 11 is connected to the rail inner 7 of the rear roof rail 5.
And the end of the extended portion 15 of the back pillar reinforce 12 is connected to the rear roof rail 5.
Bolts and nuts 17
By being fastened and fixed by 18, the back pillar 6 and the rear roof rail 5 are connected in a state where the closed cross sections are continuous.

Further, the rear roof rail reinforce 9
Has a flat portion 9 for supporting the back door hinge HG.
c is formed so as to be located above the working hole 10. The back door hinge HG is fastened and fixed to the flat portion 9c through the working hole 10 with a fastening member (not shown) interposed by a portion of the roof panel 4 corresponding to the flat portion 9c.

According to the structure of the above embodiment, since the back pillar 6 and the rear roof rail 5 are connected in a state where the closed cross sections are continuous, the rear opening of the vehicle body 1 on which the back door 3 is mounted. It is possible to avoid local concentration of stress on the corners C on both sides of the upper part of the vehicle 2, and it is possible to further increase the torsional rigidity and the bending rigidity of the rear part of the vehicle body.

Moreover, the extended portion 14 formed at the upper end of the back pillar inner 11 and the back pillar reinforcement 1
The extension portion 15 formed at the upper end of the rail inner rail 2 has a cross-sectional shape fitted to the corresponding rail inner 7 and rail outer 8 of the rear roof rail 5, and is fitted and connected to the ends of the rail inner 7 and rail outer 8. Because of the simple structure described above, it is possible to obtain a cost advantage without increasing the number of parts and the number of assembly steps.

In particular, in this embodiment, since the rear roof rail reinforce 9 is joined to the end of the rear roof rail 5, the rigidity around the connecting portion between the rear roof rail 5 and the back pillar 6 can be increased. Of course, the end of the rail inner 7 and the back pillar inner 1
After the end of the extension portion 14 is joined and fixed, the end of the rail outer 8 and the extension portion 15 of the back pillar reinforcement 12 are offset from the arrangement portion of the rear roof rail reinforcement 9 toward the roof side. The ends can be easily fastened and fixed by bolts 17 and nuts 18 through working holes 16 provided in the extending portion 14 of the back pillar inner 11, thereby improving the connection work between the back pillar 6 and the rear roof rail 5. can do.

Further, the side edge flange 4b of the roof panel 4
And the upper edge flange 21b of the body side outer 21 are overlapped with each other to extend the extended portion 15 of the back pillar reinforcement 12.
Since it is connected on the surface, the torsional load and bending load (including the load of the back door 3 itself transmitted via the back door hinge HG) concentrated on the corners C on both upper sides of the rear opening 2 of the vehicle body 1 are also reduced. , The back pillar 6 and the rear roof rail 5 are rigidly connected to each other to form a rigid body and a continuous portion.
1, and the torsional rigidity and bending rigidity at the rear portion of the vehicle body can be further increased.

Further, the side edge flange 4b of the roof panel 4 and the upper edge flange 21b of the body side outer 21 overlap at a portion above the working hole 16 provided in the extension portion 14 of the back pillar inner 11, so that Through this work hole 16, it can be easily joined to the extended portion 15 surface of the back pillar reinforce 12, and the joining workability can be improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of an area A in FIG. 8 showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an assembled state of the embodiment of the present invention.

FIG. 3 is a plan view showing an assembled state of the embodiment of the present invention.

FIG. 4 is a sectional view taken along the line BB in FIG. 3;

FIG. 5 is a sectional view taken along line CC of FIG. 3;

FIG. 6 is a sectional view taken along line DD of FIG. 3;

FIG. 7 is a diagram showing a procedure for assembling according to the embodiment of the present invention;
FIG.

FIG. 8 is a rear view of a vehicle to which the present invention is applied.

[Explanation of symbols]

 4 Roof Panel 5 Rear Roof Rail 6 Back Pillar 7 Rail Inner 8 Rail Outer 9 Rear Roof Rail Reinforce 11 Back Pillar Inner 12 Back Pillar Reinforce 14 Back Pillar Inner Extension 15 Back Pillar Reinforce Extension 16 Work Hole 17, 18 Fastening member 21 Body side outer

Claims (3)

[Claims] 1. A back pillar joined to the outer surface of a back pillar inner while an extended portion formed on the upper end of the back pillar inner and extending toward the rear roof rail with a cross-sectional shape fitting into the rail inner of the rear roof rail is formed. At the upper end of the reinforcement, an extension is formed extending toward the rear roof rail with a cross-sectional shape fitting to the rail outer of the rear roof rail, and the extension end of the back pillar inner is fitted and connected to the end of the rail inner. At the same time, the extended part end of the back pillar reinforce is fitted and connected to the end of the rail outer, and the back pillar composed of the back pillar inner and the back pillar reinforce has a closed section, and the closed section of the rail inner and the rail outer The rear structure of the vehicle body is characterized by connecting the rear roof rail configured as described above in a state where the closed cross sections are continuous. 2. A rear roof rail reinforcement is joined and disposed inside an end of the rear roof rail, and the end is overlapped with a fitting portion between an end of the rail inner and an extended end of the back pillar inner to be integrally joined. At the same time, a working hole is formed in the extending portion of the back pillar inner, and the connecting portion between the end of the rail outer and the extending portion end of the back pillar reinforce is connected to the extending portion of the rail inner end and the back pillar inner. It is arranged offset to the roof side side from the connection portion with the installation end, and the ends of these rail outers and the extension end of the back pillar reinforce are fastened and fixed by a fastening member through the work hole. The vehicle body rear structure according to claim 1. 3. An extended portion of a back pillar reinforce by superimposing an end of the roof panel on the roof side and an upper end of the body side outer turned toward the roof panel at an upper portion of the working hole. The vehicle body rear structure according to claim 2, wherein the vehicle body rear structure is joined on a surface.