JP2002029453A - Body rear part structure of automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the reinforcing effect of a rear side part by a rear floor side extension. SOLUTION: A rear floor side extension 29 is vertically and longitudinally extended and molded, the front edge is joined to joint parts of flanges 14, 15 of rear side of a rear wheel house 11 and assembled to a rear body side B.S, the rear floor side extension 29 and an erected wall part 8 of a rear floor side panel 5 are joined to each other in the vehicle width direction through a drafter opening part 18 of a rear fender panel 17 in assembling to a rear floor assembly F.A, and therefore, extension molding is made possible without hindering joining work of the rear floor side extension 29, and the reinforcing effect for the rear side part can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rear structure of a vehicle body, and more particularly to a structure of a rear wheel peripheral portion where a rear wheel house, a rear fender panel, a rear floor side panel, and a rear end panel are assembled.

[0002]

2. Description of the Related Art FIGS. 20 to 27 show a conventional structure of a peripheral portion of a rear side. Reference numeral 1 denotes a rear floor panel, the side edge of which is joined to the outer surface of a rear wheel house inner 12 via a side edge flange 2. The trailing edge is the trailing edge flange 3.
And joined to the rear end panel 4.

A rear floor side panel 5 that projects laterally is joined to both rear sides of the rear floor panel 1.

The rear floor side panel 5 has a front edge flange 6 formed by bending downward at the front edge thereof, and is superposed and joined to the rear surface of the rear wheel house inner 12 and is formed by bending downward at the rear edge. The edge flange 7 is overlapped and joined to the rear end panel 4.

An upright wall portion 8 is formed at the outer edge of the rear floor side panel 5 in the vehicle width direction to extend downward.

The upright wall portion 8 is formed by superimposing a front edge flange 9 bent inward on the front edge thereof on a rear edge flange 16 bent inward on the rear edge of the lower end portion of the rear wheel house outer 13. A rear edge flange 10 which is bent and formed inward on the rear edge of the rear end panel 4 is overlapped and joined to a side edge of the rear end panel 4.

The rear wheel house 11 is formed in a box shape by overlapping and joining the mating flanges 14 and 15 of the rear wheel house inner 12 and the rear wheel house outer 13 in the vehicle width direction. The rear surface of the wheel house outer 13 is formed so as to be offset rearward from the rear surface of the rear wheel house inner 12, and the lower end of the rear portion of the rear wheel house outer 13 is lower than the lower end of the rear wheel house inner 12. The above-mentioned trailing edge flange 16 is fitted to the trailing edge of the projected lower end portion, and is bent and formed by changing the direction of the flange 15 by substantially 90 degrees.

As shown in FIG. 24, the rear wheel house 11 is previously assembled to a rear fender panel 17 to form rear body sides B and S. The rear end panel 4 is preliminarily constructed as shown in FIG. And the rear floor side panel 5 to form a rear floor assembly FA.
The rear body sides B and S are abutted against A in the vehicle width direction, and are joined together at their abutting portions.

The rear wheel house inner 12
Between the mating flanges 14 and 15 on the rear side of the rear wheel house outer 13 and the rear floor side panel 5
The rear floor side extension 19 is joined and reinforced so as to straddle the front wall portion 8 in a forwardly inclined manner so as to be able to resist rear suspension input and a torsional load or a bending load at the rear of the vehicle body (Japanese Patent Laid-Open No. 9-328081). Reference).

[0010]

The above-mentioned rear floor side extension 19 is sub-assembled into either the rear floor assembly FA or the rear body side BS to increase the efficiency of assembling the vehicle body. Is joined to the joint of the mating flanges 14 and 15 on the rear side of the rear wheel house 11 and is sub-assembled into the rear body sides B and S, whereby the joint of the mating flanges 14 and 15 and the rear floor side extension 19 are formed. Since the joint area with the front end is relatively small and the rear floor side extension 19 fluctuates and becomes unstable in the sub-assembly state, the rear floor side extension 1 is provided on the standing wall portion 8 of the rear floor side panel 5 where the joint area can be sufficiently large. By joining the rear end portion, so that sub-assembly to the rear floor assembly F · A.

When the rear floor side extension 19 is joined to the upright wall portion 8 as described above, the front end of the rear floor side extension 19 is connected to the rear wheel when the rear floor assembly FA and the rear body side BS are assembled. It overlaps with the joint of the mating flanges 14 and 15 on the rear side of the house 11 and is spot-welded in the vehicle width direction by a spot gun (not shown).
In order to secure a work space by the spot gun between the rear floor side extension 19 and the rear end panel 4, the rear floor side extension 19 is arranged as close to the front side of the upright wall portion 8 as possible. There must be.

Accordingly, the plate width of the rear floor side extension 19 is restricted to be narrow in a strip shape, and the reinforcing effect of the rear floor side extension 19 is reduced.

A drafter opening 18 is formed in the lower part of the rear part of the rear fender panel 17 for ventilation of the vehicle interior. As described above, the position of the rear floor side extension 19 is different from that of the rear floor side panel 5. 25, a gap S is formed between the rear edge of the rear floor side extension 19 and the rear upper corner portion of the drafter opening 18 on the side projection plane as shown by hatching in FIG. This results in poor sound insulation.

Further, a paint seal is applied to a joint P between the upper edge of the upright wall portion 8 and the joining portion of the mating flanges 14 and 15 in the same manner as the other joint portions.
Are in a non-joined state, and the joint between the front edge flange 6 of the rear floor side panel 5 and the front edge flange 9 of the upright wall portion 8 is offset in the up-down direction and the front-back direction, so that the seam portion P is bent. Paint seals are easily peeled off.

A connecting portion between the rear edge flanges 10 and 7 and a connecting portion between the mating flange 15 and the rear edge flange 16 of the rear wheel house outer 13 are provided at the base of the upper edge of the front edge flange 9 of the upright wall portion 8. Notch 2 for crack prevention provided in the installation part
3, 22 and a notch 21 is provided. At the connection portion between the front edge of the upright wall portion 8 and the rear edge of the rear wheel house outer 13, these notches 21 and 22 face each other to form a circular hole. The paint seal is also applied to the circular hole, and the paint seal is closed. However, the paint seal at the circular hole portion is also easily peeled off due to the effect of the bending at the joint portion P.
Of the paint seal around the upper front part is deteriorated.

Accordingly, the present invention can increase the rear floor side extension in the up-down direction and the front-rear direction without affecting the joining operation, thereby enhancing the reinforcing effect of the rear side portion, and also joint rigidity of the front upper edge portion of the rear floor side panel. Another object of the present invention is to provide a rear body structure of an automobile which can enhance paint sealability and can also enhance sound insulation around a drafter opening.

[0017]

According to the first aspect of the present invention, a front edge flange of a rear floor side panel joined to a side portion of a rear floor panel is overlapped with and joined to a rear surface of a rear wheel house inner. A rear edge flange of the rear floor side panel is overlapped and joined to a side edge of the rear end panel and a rear edge of the rear fender panel, and a joining portion of a mating flange of a rear wheel house inner and a rear side portion of a rear wheel house outer is formed. In a structure in which the rear floor side extension is joined to the standing wall portion on the outside in the vehicle width direction of the rear floor side panel and is reinforced, the rear floor side extension is vertically enlarged to the lower end position of the rear wheel house outer, and Formed in the front-rear direction to the width across the front and rear ends of the standing wall, The front edge of the rear floor side extension is joined to the joining portion of the mating flange, and sub-assembled to the rear body side where the rear wheel house and the rear fender panel are assembled, and the rear end panel is attached to the rear body side and the rear floor panel. At the time of assembling with the assembled rear floor assembly, the rear floor side extension and the upright wall portion of the rear floor side panel are overlapped and joined in the vehicle width direction through a drafter opening provided in the rear fender panel.

According to the second aspect of the present invention, the mating flange on the rear side of the rear wheel house outer according to the first aspect is extended to the lower end of the rear wheel house outer, and is provided in front of the rear floor side extension. The edge portion is overlapped and joined over the lower end of the mating flange of the rear wheel house outer.

According to a third aspect of the present invention, a front edge flange extends forwardly at the lower end of the front edge of the rear floor side extension according to the first aspect, and the front edge flange is attached to the rear wheel house outer. It is characterized by being superimposed and joined to the lower end of the rear surface.

In the invention of claim 4, claims 1 to 3 are provided.
The vertical wall portion of the rear floor side panel described in (1) is formed to have approximately the same vertical width as the front and rear edge flanges of the rear floor side panel, and the lower end of the rear fender panel is overlapped and joined to the lower end of the rear floor side extension. Features.

According to the fifth aspect of the present invention, the first to fourth aspects are provided.
On the rear edge of the rear floor side extension described in
A rear edge flange is extended over the upper and lower ends, and the rear edge flange is overlapped and joined to a side edge of the rear end panel and a rear edge of the rear fender panel.

[0022]

According to the first aspect of the present invention, the rear floor side extension is vertically enlarged to the lower end position of the rear wheel house outer.
Since the rear floor side panel is formed so as to extend in the front-rear direction so as to extend to the front and rear ends of the vertical wall, the reinforcing effect of the rear floor side extension by the rear floor side extension can be further enhanced, and the rear fender panel can be projected on the side projection surface. The drafter opening can be covered with the rear floor side extension, and the sound insulation can be improved.

Also, this rear floor side extension has its front edge joined to the joint of the mating flange on the rear side of the rear wheel house, and is sub-assembled to the rear body side. At the time of assembly, the rear floor side extension and the vertical wall of the rear floor side panel were overlapped and joined in the vehicle width direction through the drafter opening of the rear fender panel, so the rear floor side extension was expanded and molded in the front and rear direction Even if there is, the rear end panel does not hinder the joining operation of the rear floor side extension as in the related art, and the assembling operation can be easily performed.

Also, the rear floor side extension can be joined to the front and rear ends of the upright wall portion, and the front end portion of the upright wall portion can be joined to the joining portion of the mating flange in the vehicle width direction. The joining rigidity of the upper edge on the front side of the panel can be increased, and the paint seal applied to the joint portion does not peel off, so that the paint sealability can be improved.

According to the second aspect of the present invention, the first aspect is provided.
In addition to the effects of the invention described in the above, the mating flange of the rear wheel house outer is extended to the lower end of the rear wheel house outer, and the front edge of the rear floor side extension is connected to the mating flange of the rear wheel house outer. Since it is joined over the lower end, the joining rigidity of the rear floor side extension can be increased, the support stability in a state of being sub-assembled on the rear body side can be improved, and the effect of reinforcing the rear side portion by the rear floor side extension can be improved. Can be further enhanced.

According to the invention described in claim 3, according to claim 1
In addition to the effects of the invention, the front edge flange extending forward and extending to the lower edge of the front end of the rear floor side extension is joined to the lower end of the rear surface of the rear wheel house outer to ensure a large joint area. Because
By increasing the joining rigidity of the rear floor side extension, it is possible to improve the support stability in a state where the rear floor side sub-assembly is sub-assembled, and it is possible to further enhance the reinforcing effect of the rear floor side extension by the rear floor side extension.

Further, a conventional rear wheel house outer formed by bending the rear edge flange toward the inside in the vehicle width direction below the mating flange can be used, and it can be advantageously obtained in cost.

According to the invention of claim 4, according to claim 1,
In addition to the effects of the inventions of (1) to (3), the size of the rear floor side panel can be reduced, parts management and assembly work can be easily performed, and the lower end of the rear floor side extension and the lower end of the rear fender panel The support stability of the rear floor side extension in a state of being subassembled on the rear body side can be further improved, and the rear floor side extension can be replaced with the rear fender panel instead of the standing wall portion of the rear floor side panel. , It is possible to sufficiently secure the strength and rigidity of the rear side portion.

According to the invention described in claim 5, according to claim 1,
In addition to the effects of the inventions of (1) to (4), since the rear edge flange of the rear floor side extension is overlapped and joined to the side edge of the rear end panel and the rear edge of the rear fender panel, reinforcement of the rear side portion by the rear floor side extension is provided. The effect can be further enhanced.

[0030]

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

1 to 12, a rear floor assembly FA includes a rear floor panel 1 and a rear floor side panel 5 which is vertically overlapped on both rear sides of the rear floor panel 1 and is joined by spot welding to project laterally.
And a rear end panel 4 overlapped on the rear edge flange 3 of the rear floor panel 1 and joined by spot welding (see FIG. 4).

As shown in FIGS. 2 and 4, a side flange of the rear floor panel 1 is bent upward along a shape of an outer surface of a rear wheel house inner 12 to be described later. The front edge flange 6 is bent downward along the rear surface shape of the rear wheel house inner 12 on the lateral extension of the side edge flange 2.

On the rear edge of the rear floor side panel 5, a rear edge flange 7 is bent downward along the side extension of the rear edge panel 3 on the side extension of the rear edge flange 3 of the rear floor panel 1. The rear edge flange 7 is overlapped on the side of the rear end panel 4 and joined by spot welding (see FIG. 4).

An upright wall portion 8 is formed to be bent downward at an outer side edge of the rear floor side panel 5 in the vehicle width direction.
In the present embodiment, the upright wall portion 8 is formed to be shorter in the same vertical dimension as the front edge flange 6 and the rear edge flange 7.

The rear wheel house 11 includes a rear wheel house inner 12 and a rear wheel house outer 13.
Of the rear wheel house 11 are formed by overlapping and joining the mating flanges 14 and 15 in the vehicle width direction.
Are previously assembled to the rear fender panel 17 to form rear body sides B and S (see FIG. 5).

As shown in FIG. 8, the rear wheel house 11 is formed so that the rear surface of the rear wheel house outer 13 is offset rearward of the rear surface of the rear wheel house inner 12 as shown in FIG. As shown in FIG. 3, the rear lower end of the rear wheel house outer 13 is formed to protrude below the lower end of the rear wheel house inner 12, and in this embodiment, the rear side of the rear wheel house outer 13 is formed. The mating flange 15 of the rear wheel house outer 13 as shown in FIG.
It extends to the lower end of.

The above-mentioned rear floor assembly FA and rear body side BS are abutted in the vehicle width direction on the vehicle body assembly line, and the side edge flange 2 of the rear floor panel 1 and the front edge flange 6 of the rear floor side panel 5 are joined. At the same time, the rear side of the inner rear wheel house 12 is overlapped with the side surface and the rear surface thereof and joined by spot welding, and the rear edge of the rear fender panel 17 is overlapped with the side edge of the rear end panel 4 and joined by spot welding and assembled. .

A mating flange 1 at the rear side of the rear wheel house inner 12 and the rear wheel house outer 13
As shown in FIG. 1, a rear floor side extension 29 is joined and reinforced across the joints 4 and 15 and the standing wall portion 8 of the rear floor side panel 5 to reinforce the rear suspension input and the torsional load or bending load at the rear of the vehicle body. To be able to compete.

Rear floor side extension 29
Is the conventional rear floor side extension 19
As compared with the case of the rear wheel house outer 13, it is formed in the vertical direction so as to extend to the lower end position, and the front floor portion 8 of the rear floor side panel 5 is formed so as to be enlarged in the front and rear direction in the front and rear ends.

This rear floor side extension 2
Reference numeral 9 designates a front edge portion of a mating flange 14, 1 of the rear wheel house inner 12 and the rear wheel house outer 13.
5 from the joint of No. 5 to the lower end of the mating flange 15 of the rear wheel house outer 13 and join by spot welding, and the lower end of the rear floor side extension 29 overlaps the lower end of the rear fender panel 17 to form a spot. It is joined by welding and sub-assembled to the rear body side BS.

When the rear floor assembly FA and the rear body side BS are assembled on the vehicle body assembly line, the rear floor side extension 29 is overlapped with the upright wall 8 of the rear floor side panel 5,
Rear fender panel 1 as shown in FIGS.
7 are joined by spot welding in the vehicle width direction by a spot gun (not shown) through a drafter opening 18 provided in the apparatus.

In the present embodiment, a rear edge flange 30 is provided at the rear edge of the rear floor side extension 29 so as to extend from the upper end to the lower end.
0 is the side edge of the rear end panel 4 and the rear fender panel 1
7, and is joined by spot welding (see FIG. 8).

According to the structure of the above-described embodiment, the rear floor side extension 29 is formed so as to be vertically enlarged to the lower end position of the rear wheel house outer 13, and the front and rear of the upright wall portion 8 of the rear floor side panel 5. The rear floor side extension 29 can further enhance the reinforcing effect of the rear side portion because the rear side side extension 29 is formed by enlarging in the front-rear direction to the width across the end, and the draft of the rear fender panel 17 on the side projection surface as shown in FIG. The opening 18 can be covered with the rear floor side extension 29, so that sound insulation can be improved.

The rear floor side extension 29 has its front edge joined to the joint of the mating flanges 14 and 15 on the rear side of the rear wheel house 11, and is sub-assembled to the rear body sides B and S. hand,
Rear body side BS, rear floor assembly F
When assembling with A, rear floor side extension 2
9 and the upright wall 8 of the rear floor side panel 5 are overlapped and joined in the vehicle width direction through the drafter opening 18 of the rear fender panel 17, so that the rear floor side extension 29 is enlarged in the front-rear direction. Unlike the conventional case, the rear end panel 4 does not hinder the joining operation of the rear floor side extension 29, and the assembling operation can be easily performed.

Further, the rear floor side extension 29 can be joined to the front and rear ends of the upright wall portion 8, and the front end portion of the upright wall portion 8 is also connected to the drafter opening 18.
Can be joined in the vehicle width direction to the joining portion of the mating flanges 14 and 15, so that the joining rigidity of the front upper edge of the rear floor side panel 5 can be increased, and the paint seal applied to the joint portion can be peeled off. And paint sealability can be improved.

Here, particularly in the present embodiment, the mating flange 15 of the rear wheel house outer 13 is extended to the lower end of the rear wheel house outer 13,
Since the front edge of the rear floor side extension 29 is joined to the lower end of the mating flange 15 of the rear wheel house outer 13, the joining rigidity of the rear floor side extension 29 is increased and the sub-assembly is formed on the rear body side BS. In this state, the support stability can be improved, and the effect of reinforcing the rear side portion by the rear floor side extension 29 can be further enhanced.

Further, the upright wall portion 8 of the rear floor side panel 5 is formed to be short in the same vertical direction as the front edge flange 6 and the rear edge flange 7 of the rear floor side panel 5, so that the rear floor side panel 5 can be reduced in size. Parts management and assembly work can be easily performed, and the rear floor side extension 29
The lower end of the rear fender panel 17 and the lower end of the rear fender panel 17 are joined together.
9 can be further improved, and the rear floor side extension 29 can be replaced with the rear fender panel 1 instead of the upright wall 8 of the rear floor side panel 5.
7, the strength and rigidity of the rear side portion can be sufficiently ensured.

Further, since the rear edge flange 30 of the rear floor side extension 29 is overlapped and joined to the side edge of the rear end panel 4 and the rear edge of the rear fender panel 17, the rear side portion is reinforced by the rear floor side extension 29. The effect can be further enhanced.

FIGS. 13 to 19 show a second embodiment of the present invention. In this embodiment, a front edge flange 31 extending forward is provided at the lower end of the front edge of a rear floor side extension 29. The front edge flange 31 is overlapped with the lower end of the rear surface of the rear wheel house outer 13 and joined by spot welding.

According to the second embodiment, the front edge flange extending from the lower end of the front edge of the rear floor side extension 29 as described above is connected to the rear wheel house outer 1.
3 is joined to the lower end of the rear surface so that a large joint area can be secured, so that the joint rigidity of the rear floor side extension 29 can be increased and the rear body side B
The support stability in the state of being sub-assembled to the S can be improved, and the rear floor side extension 2
9 can further enhance the effect of reinforcing the rear side portion.

Further, even when the conventional rear wheel house outer 13 formed by bending the rear edge flange 16 inward in the vehicle width direction with the notch 22 below the mating flange 15 is used, the rear edge flange 16 Does not hinder the joining of the front edge flange 31 at the lower end portion of the front edge of the rear floor side extension 29, and the notch 22 and the rear edge flange 16 are hidden behind the front edge flange 31 in the vehicle width direction. Exposure of the rear wheel house outer 1
Since 3 can be shared with the conventional one, it can be advantageously obtained in terms of cost.

In the above embodiment, the rear wheel inner 12 and the rear rear wheel outer 13 are offset in the front-rear direction.
Of course, the present invention can be applied to the rear wheel house inner 12 and the rear wheel house outer 13 whose rear surfaces are not offset in the front-rear direction.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the vicinity of a joint between a rear wheel house and a rear floor panel according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a joint state of the rear floor panel and the rear floor side panel according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing a joint state between the rear wheel house and the rear floor side extension according to the first embodiment of the present invention.

FIG. 4 is a perspective view showing a rear floor assembly according to the first embodiment of the present invention.

FIG. 5 is a perspective view showing a rear body side according to the first embodiment of the present invention.

FIG. 6 is a side view of a rear body side according to the first embodiment of the present invention.

FIG. 7 is a sectional view taken along the line AA in FIG. 6;

FIG. 8 is a sectional view taken along the line BB of FIG. 6;

FIG. 9 is a perspective view of a rear wheel house inner according to the first embodiment of the present invention.

FIG. 10 is a perspective view of a rear wheel house outer according to the first embodiment of the present invention.

FIG. 11 is a perspective view of a rear fender panel according to the first embodiment of the present invention.

FIG. 12 is a perspective view of a rear end panel according to the first embodiment of the present invention.

FIG. 13 is a perspective view showing the vicinity of a joint between a rear wheel house and a rear floor panel according to a second embodiment of the present invention.

FIG. 14 is a perspective view showing a joint state between a rear wheel house and a rear floor side extension according to a second embodiment of the present invention.

FIG. 15 is a perspective view showing a rear body side according to a second embodiment of the present invention.

FIG. 16 is a side view of a rear body side according to the second embodiment of the present invention.

FIG. 17 is a sectional view taken along the line CC of FIG. 16;

FIG. 18 is a perspective view of a rear wheel house outer according to a second embodiment of the present invention.

FIG. 19 is a perspective view showing a rear floor side extension according to the second embodiment of the present invention.

FIG. 20 is a perspective view showing the vicinity of a joint between a rear wheel house and a rear floor panel in a conventional structure.

FIG. 21 is a perspective view showing a joint state between a rear floor panel and a rear floor side panel in a conventional structure.

FIG. 22 is a perspective view showing a rear wheel house in a conventional structure.

FIG. 23 is a perspective view showing a rear floor assembly in a conventional structure.

FIG. 24 is a perspective view showing a rear body side in a conventional structure.

FIG. 25 is a side view of a rear body side in a conventional structure.

FIG. 26 is a sectional view taken along the line DD in FIG. 25;

FIG. 27 is a sectional view taken along the line EE in FIG. 25;

[Explanation of symbols]

REFERENCE SIGNS LIST 1 rear floor panel 4 rear end panel 5 rear floor side panel 6 front edge flange of rear floor side panel 7 rear edge flange of rear floor side panel 8 upright wall section 11 rear wheel house 12 rear wheel house inner 13 rear wheel house outer 14 rear wheel house inner Flange 15 Rear wheel house outer mating flange 17 Rear fender panel 18 Drafter opening 29 Rear floor side extension 30 Rear floor side extension rear edge flange 31 Front edge flange of rear floor side extension F ・ A Rear floor assembly B ・ S Rear body side

Claims (5)

[Claims] 1. A front edge flange of a rear floor side panel joined to a side portion of a rear floor panel is overlapped and joined to a rear surface of a rear wheel house inner, and a rear edge flange of the rear floor side panel is joined to a side edge of a rear end panel. To the rear edge of the rear fender panel, and to the joint of the rear flange of the rear wheel house inner and the rear side of the rear wheel house outer, and to the outer wall in the vehicle width direction of the rear floor side panel. In a structure in which the rear floor side extension is joined and reinforced by straddling, the rear floor side extension is vertically enlarged to the lower end position of the rear wheel house outer, and the front and rear width of the rear wall side extension extends in the front and rear directions. The front edge of the rear floor side extension And a sub-assembly to the rear body side where the rear wheel house and the rear fender panel are assembled, and the rear body side and the rear floor assembly where the rear end panel is assembled to the rear floor panel. A rear body structure of an automobile, wherein a rear floor side extension and an upright wall of a rear floor side panel are overlapped with each other at the time of assembly and are joined in a vehicle width direction through a drafter opening provided in a rear fender panel. 2. The rear flange of the rear wheel house outer is extended to the lower end of the rear wheel house outer, and the front edge of the rear floor side extension is connected to the lower end of the rear flange of the rear wheel house outer. 2. The method according to claim 1, wherein the components are superposed and joined.
The vehicle body rear structure according to claim 1. 3. A front edge flange is extended from a front edge lower end of a rear floor side extension so as to project forward, and the front edge flange is overlapped and joined to a rear lower end of a rear wheel house outer. The vehicle body rear structure according to claim 1. 4. The standing wall portion of the rear floor side panel is formed to have approximately the same vertical width as the front and rear edge flanges of the rear floor side panel, and the lower end of the rear fender panel is overlapped and joined to the lower end of the rear floor side extension. The vehicle body rear structure according to any one of claims 1 to 3, characterized in that: 5. A rear edge flange is provided at the rear edge of the rear floor side extension over the upper and lower ends, and the rear edge flange is overlapped and joined to the side edge of the rear end panel and the rear edge of the rear fender panel. The vehicle body rear structure according to any one of claims 1 to 4, wherein: