JP2014019219A - Rear part vehicle body structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rear part vehicle body structure of a vehicle compatibly achieving rigidity of a vehicle body rear part and productivity.SOLUTION: A rear part vehicle body structure includes: a rear header 4 which includes a rear header inner 21 and a rear header upper 23 over an opening 5 in a vehicle body rear part and extends in a vehicle width direction; a rear pillar closed cross section part 14 which includes a rear pillar inner 11 and a rear pillar reinforcement 13 and extends downward; an upward opened groove part 7 which is formed in a joint between a vehicle width direction outside end of a roof panel 1 and a vehicle width direction inside end of a roof side rail outer 2a and extends in a vehicle body longitudinal direction. The rear header inner 21 is connected to the rear pillar inner 11, the rear header upper 23 is separately disposed to cover at least a part of the rear pillar reinforcement 13, and the rear header 4 is made continuous to the rear pillar closed cross section part 14. An extension part 24 is provided to extend from the vehicle width direction outside end of the rear header upper 23 to the vehicle width direction outside, and the extension part 24 is joined to the groove part 7.

Description

  The present invention relates to a rear vehicle body structure of a vehicle, and more particularly to a vehicle in which a rear header upper section is spaced apart so as to cover at least a part of a rear pillar reinforcement and a rear header closed cross section and a rear pillar closed cross section are connected. It relates to the rear body structure.

  2. Description of the Related Art Conventionally, in a vehicle such as a hatchback, an opening for mounting a back door (lift gate) is formed at the rear of the vehicle body, and a pair of left and right rear pillar closed cross sections, a rear header closed cross section, and a rear end near the back door opening. 2. Description of the Related Art A rear vehicle body structure in which a closed cross section with a member closed cross section is connected in series in a substantially loop shape is known. Thereby, the torsional rigidity of the vehicle body can be increased by increasing the rigidity of the rear part of the vehicle body, and the steering stability can be improved.

In recent years, there is a tendency to abolish quarter pillars from the viewpoint of backward visibility from the driver's seat, and there is also a tendency to move the rear header placement position to the front of the vehicle body from the viewpoint of vehicle design and the like.
As a result, the width in the front-rear direction between the rear door opening and the back door opening is reduced, so that the width in the front-rear direction of the rear pillar is inevitably reduced, and the vehicle body rigidity in the vicinity of the back door opening may be reduced. Accordingly, various techniques for further increasing the rigidity in the vicinity of the back door opening have been proposed.

  The rear vehicle body structure of the vehicle of Patent Document 1 is a vehicle body structure having a quarter window and a quarter pillar, and includes a first closed cross-section portion (rear header closed cross-section portion) extending in the vehicle width direction and a second closed cross-section extending in the vertical direction. Part (quarter pillar closed section) and a third closed section (roof side rail closed section) extending in the front-rear direction, and the first closed section, the second closed section, and the third closed section A joint member for continuously connecting the closed cross-sections of the first closed cross-section and the second closed cross-section to the connecting portion is provided. According to the rear vehicle body structure of the vehicle, the closed cross-section space between the first closed cross-section portion and the second closed cross-section portion can be continuously connected without being interrupted, and the rigidity of the rear portion of the vehicle body can be improved. .

JP 2010-179663 A

According to the rear body structure of the vehicle disclosed in Patent Document 1, the joint member is used as a node member for continuously connecting the first closed cross section and the second closed cross section, thereby improving the rigidity of the vehicle body. .
However, in this rear body structure of the vehicle, it is necessary to newly install a joint member, which may increase the weight of the vehicle body and increase the production cost due to an increase in the number of parts. In addition, the joint member is positioned at the connecting portion of the first closed cross-section portion, the second closed cross-section portion, and the third closed cross-section portion, and joined to the constituent members of the first closed cross-section portion and the second closed cross-section portion. Therefore, there is a possibility that the productivity is lowered due to an increase in the assembly work process.

  On the other hand, when the rear header closed cross-section and the rear pillar closed cross-section are continuous even in the conventional structure that does not use a joint member, the rear header upper is attached to the rear pillar reinforcement after spot-contacting the rear header inner and the rear pillar inner. Since the rear header upper and the rear pillar reinforcement are spot-joined in a superposed manner in a state of covering them closely, the joint accuracy between the rear header upper and the rear pillar reinforcement in the longitudinal direction and the vertical The positional accuracy of the direction must be well managed.

  That is, since the rear header upper and the rear pillar reinforcement, which are panel members, each have a variation in the member shape (manufacturing tolerance), it is inevitable when joining the rear header upper and the rear pillar reinforcement. In addition to the assembly error occurring in the above, there is a possibility that the two cannot be accurately superposed due to the variation in the member shape described above. Therefore, excessive tolerance management and a repair process before the welding process are required, and problems to be solved in terms of productivity remain.

  An object of the present invention is to provide a rear body structure of a vehicle that can achieve both rigidity and productivity at the rear of the vehicle body.

  The rear vehicle body structure of the vehicle according to claim 1 includes a rear header inner cross section formed of a rear header inner and a rear header upper above the opening of the rear portion of the vehicle body and extending in the vehicle width direction, and a rear pillar inner and a rear pillar reinforcement. A rear pillar closed cross-section portion configured and extending downward, and an upwardly open groove portion formed at a joint portion between the vehicle width direction outer end portion of the roof and the vehicle width direction inner end portion of the roof side rail outer and extending in the vehicle body longitudinal direction. The rear header inner section and the rear pillar inner are connected to each other, and the rear header upper is separated from the rear pillar reinforcement so as to cover at least a part of the rear pillar reinforcement. Constructed to be connected to the closed cross section, the vehicle width from the outer end in the vehicle width direction of the rear header upper The extended portion extending toward the outside is provided, and characterized in that joined to this extended portion to the groove.

  In the rear vehicle body structure of this vehicle, the rear header inner and the rear pillar inner are connected, and the rear header upper is spaced apart so as to cover at least a part of the rear pillar reinforcement so that the rear header closed cross section and the rear pillar closed cross section are formed. The rear header upper section and rear pillar reinforcement section can be overlapped regardless of the vertical position accuracy between the rear header upper section and rear pillar reinforcement section. Can be easily continued.

According to a second aspect of the present invention, in the first aspect of the invention, the rear pillar reinforcement includes a rear pillar rain main body portion having a substantially U-shaped cross section, and the extending portion can partially surround the rear pillar rain main body portion. An extended main body portion having a substantially U-shaped cross section is provided.
According to a third aspect of the present invention, in the second aspect of the present invention, the extended portion includes an extended flange portion extending in the vehicle longitudinal direction from the vehicle longitudinal direction end of the extended main body.

The invention of claim 4 is characterized in that, in the invention of any one of claims 1 to 3, a bead extending in the vehicle width direction is provided in the extended portion.
According to a fifth aspect of the present invention, in the invention according to any one of the second to fourth aspects, the extending portion is configured such that a vertical overlapping width that covers the rear pillar reinforcement is smaller toward an outer side in the vehicle width direction. It is characterized by that.

  According to a sixth aspect of the present invention, in the third aspect of the present invention, the opening includes an opening inner, and an opening reinforce forming an opening closed cross-sectional portion surrounding the opening periphery in cooperation with the opening inner. And the opening reinforcement includes an opening rain flange portion, and the opening rain flange portion and the rear extension flange portion are joined to each other.

According to the first aspect of the present invention, the rear header upper and the rear pillar reinforcement can be arranged in an overlapping manner regardless of the positional accuracy of the rear header upper and the rear pillar reinforcement in the vertical direction. Therefore, it is possible to omit excessive tolerance management and a repair process for correcting misalignment caused by variations in member shapes and the like, thereby improving productivity.
A front-rear direction in which a closed cross-sectional portion continuous from the side of the vehicle body to the top of the vehicle body is formed in the vicinity of the opening at the rear of the vehicle body, and the extended portion of the rear header upper that is a component of the closed cross-sectional portion is provided on the roof Therefore, the rigidity of the rear portion of the vehicle body can be improved without increasing the cross-sectional area of the rear pillar closed cross-section and increasing the number of parts.

According to the second aspect of the present invention, the rear pillar closed section and the rear header closed section can be made continuous with a simple configuration, and the rigidity of the rear pillar closed section can be increased.
According to the invention of claim 3, the rigidity of the rear pillar closed section can be further increased by the extended flange portion.

According to the invention of claim 4, by improving the rigidity of the extending portion, it is possible to increase the rigidity of the connection between the rear header closed cross-section near the opening and the rear pillar closed cross-section continuous to the groove and the rear portion of the vehicle body. Stiffness can be increased.
According to the fifth aspect of the present invention, since the portion contributing to stress transmission from the rear header upper to the rear pillar reinforcement gradually decreases, the rear header upper and the rear pillar reinforcement do not form a stress concentration portion. Can be continued.

  According to the sixth aspect of the present invention, the closed cross-sectional portion at the periphery of the rear opening and the closed cross-sectional portion in the vicinity of the rear opening are joined adjacent to each other in the front-rear direction. It is possible to further increase the rigidity of the closed cross section.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a rear perspective view of a rear body structure of a vehicle according to a first embodiment of the present invention. It is a side view from the vehicle interior side of a rear body structure. FIG. 6 is a side view of the rear vehicle body structure from the outside of the passenger compartment with the side panel omitted. It is the IV-IV sectional view taken on the line of FIG. It is the principal part perspective view which abbreviate | omitted the roof and side panel of FIG. FIG. 6 is a plan view of FIG. 5. It is the VII-VII sectional view taken on the line of FIG. It is the VIII-VIII sectional view taken on the line of FIG. It is the IX-IX sectional view taken on the line of FIG. FIG. 5 is a sectional view taken along line XX in FIG. 4. It is the XI-XI sectional view taken on the line of FIG.

  Hereinafter, modes for carrying out the present invention will be described based on examples. In the figure, the arrow F direction is described as the front side of the vehicle body, and the arrow L direction is described as the left side of the vehicle body.

Embodiment 1 of the present invention will be described below with reference to FIGS.
The vehicle V to which the present invention is applied is a five-door hatchback type vehicle including a front seat including a driver's seat, a rear seat located on the rear side, and a luggage compartment located on the rear side. In the following description, reinforcement is abbreviated as rain.

As shown in FIGS. 1 to 6, the vehicle V according to the present embodiment includes a roof panel 1, a pair of left and right roof side rails 2, a pair of left and right rear pillars 3, and a rear header 4 (rear header closed cross section). And an opening 5 provided at the rear of the vehicle body.
As shown in FIG. 1 and FIG. 7, rail portions 1 a that are stepped in a crank shape downward are formed on the left and right ends of the roof panel 1, respectively. A pair of left and right roof side rails 2 extending in the front-rear direction are installed outside the roof panel 1 in the vehicle width direction.

The pair of left and right roof side rails 2 are respectively provided with roof side rail outers 2a, and these roof side rail outers 2a are each constituted by an upper end side portion of an outer panel 6 constituting an outer wall portion of the vehicle body. Rail portions 2b that are stepped downward in a crank shape are formed at the inner ends in the vehicle width direction of the roof side rail outer 2a.
Each rail portion 2b is overlapped with the corresponding rail portion 1a in the front-rear direction, and this overlapped portion is joined by spot welding to form a pair of left and right upper open groove portions 7 extending in the front-rear direction of the vehicle body. ing.

Next, the pair of left and right rear pillars 3 will be described.
The pair of left and right rear pillars 3 are respectively configured to extend downward from the rear ends of the pair of left and right roof side rails 2. In addition, since the structure of the pair of left and right rear pillars 3 is a substantially left-right symmetric structure, the right rear pillar 3 will be mainly described below.

As shown in FIGS. 1 to 7, the rear pillar 3 forms a closed cross section extending in the vertical direction from the wheel house 8 to the outer end in the vehicle width direction of the rear header 4.
The rear pillar 3 includes a rear pillar inner 11, a rear pillar outer 12, a rear pillar rain 13 that forms a rear pillar closed section 14 in cooperation with the rear pillar inner 11, and the like.

As shown in FIGS. 2, 7, and 8, the rear pillar inner 11 includes a rear pillar inner panel 15 and a part of the front side portion of the corner plate 16, and the rear pillar outer 12 is a rear end side portion of the outer panel 6. It is constituted by.
The rear pillar inner panel 15 is formed in a substantially triangular shape when viewed from the side, and constitutes a vehicle interior wall that extends in the vertical and longitudinal directions from the wheel house 8 to the roof side rail 2. The rear upper part of the rear pillar inner panel 15 is joined to the lower end of the corner plate 16, and the rear lower part of the rear pillar inner panel 15 is joined to the lower end of the rear side panel 17.
A bead portion 15a that extends in the vertical direction and protrudes toward the vehicle interior side is provided at an intermediate portion in the front-rear direction of the rear pillar inner panel 15. The lower end of the bead portion 15a is disposed on an upper extension line of a front gusset 18a and a rear gusset 18b, which will be described later, and the upper end thereof is formed to correspond to the rear header 4.

As shown in FIGS. 2 to 6, the corner plate 16 is formed in a substantially curved shape when viewed from the front, and is formed at the upper end corner of the opening 5, the rear end of the roof side rail 2, and the upper end of the rear pillar 3. It is comprised so that each may be connected straddling.
A suspension housing inner rain 18 is joined to the lower portion of the rear pillar inner panel 15 on the vehicle interior side via the upper portion of the wheel house outer 8b. The suspension housing inner rain 18 is connected to the vehicle interior side of the wheel house inner 8a. The upper part and the lower end of the rear pillar inner panel 15 are connected to each other, and a triangular closed section is formed in front view in cooperation with the wheel house inner 8a and the wheel house outer 8b.

As shown in FIG. 2, the suspension housing inner rain 18 is provided with a front gusset 18a and a rear gusset 18b disposed on the rear side of the front gusset 18a.
The front gusset 18a is provided so as to be inclined forwardly downward from the lower front side of the suspension housing inner rain 18, and is formed in a substantially straight shape continuous from below with a closed cross section formed by the suspension housing inner rain 18 and the like in cooperation with the wheel house inner 8a. The closed cross-section part is comprised.
The rear gusset 18b is provided so as to be inclined downwardly from the rear lower part of the suspension housing inner rain 18 and is connected to the closed cross section formed by the suspension housing inner rain 18 and the like in cooperation with the wheel house inner 8a from below. A straight closed section is formed.

  As shown in FIGS. 3 and 7, a suspension housing outer rain 19 is provided between the rear pillar inner panel 15 and the rear pillar outer 12. The suspension housing outer rain 19 has a substantially U-shaped cross section, and its lower end is joined to the upper portion of the wheel house outer 8b that bulges outside the vehicle compartment.

As shown in FIGS. 7 to 11, the rear pillar rain 13 is disposed between the rear pillar inner 11 and the rear pillar outer 12, and has a substantially hat-shaped cross section.
The rear pillar rain 13 is joined at its lower end to the upper end of the suspension housing outer rain 19, extends substantially straight upward in the middle part facing the rear pillar inner panel 15, and inward in the vehicle width direction in the upper part facing the corner plate 16. It is comprised in the substantially curved shape which curves to the side. Therefore, the rear pillar closed cross-section portion 14 extends in a substantially straight shape upward from the wheel house outer 8b in the lower portion, and is curved in the vehicle width direction inner region from the groove portion 7 in the upper portion.

  The rear pillar rain 13 includes a rear pillar rain main body 13a having a substantially U-shaped cross section, a front rear pillar rain flange 13b that extends forward from the front end of the rear pillar rain main body 13a, and a rear extension from the rear end of the rear pillar rain main body 13a. The rear side rear pillar rain flange part 13c etc. are provided.

  As shown in FIG. 8, the front rear pillar rain flange portion 13b is joined to the rear pillar inner panel 15 at the lower portion and the middle portion, and joined to the roof rail inner (not shown) at the upper portion. The rear rear pillar rain flange portion 13c is joined to the rear pillar inner panel 15 at the lower portion, and joined to the corner plate 16 at the middle portion and the upper portion.

Next, the rear header 4 will be described.
As shown in FIGS. 2 to 7, the rear header 4 constitutes a rear header closed cross-sectional portion extending in the vehicle width direction above the opening 5 and at a position below the rear end of the roof panel 1.
The rear header 4 includes a rear header inner 21, a pair of left and right hinge rains 22 for supporting the hinges of the lift gate, a rear header upper 23, and the like.
The left and right end portions in the vehicle width direction of the rear header inner 21 are respectively connected to the inner end portions in the vehicle width direction of the pair of left and right corner plates 16 via a pair of left and right hinge rains 22.

  The rear header upper 23 is disposed between the rear header inner 21 and the roof panel 1 and is formed in a substantially hat-shaped cross section with a downward opening. The rear header upper 23 is smaller in width in the front-rear direction than the rear header inner 21 and has a vehicle width direction length. It is configured to be large. The rear header upper 23 includes a rear header upper body portion 23a having a substantially U-shaped cross section, a front rear header upper flange portion 23b extending forward from the front end of the rear header upper body portion 23a, and a rear header upper body portion 23a. A rear rear header upper flange portion 23c extending rearward from the rear end and a pair of left and right extending portions 24 extending from the outer end in the vehicle width direction of the rear header upper 23 to the outer side in the vehicle width are provided.

As shown in FIGS. 7 and 11, the rear header upper main body portion 23a is spaced apart from the rear pillar rain main body portion 13a by a predetermined distance so as to cover the outer periphery of the inner portion in the vehicle width direction of the rear pillar rain main body portion 13a. Therefore, a space S is formed between the upper wall portion of the rear header upper main body portion 23a and the upper wall portion of the rear pillar rain main body portion 13a.
In order to adhere the upper wall portion of the rear header upper main body portion 23a and the upper wall portion of the rear pillar rain main body portion 13a to the space S corresponding to the outer end portion in the vehicle width direction of the rear header upper main body portion 23a The adhesive 26 is filled with, for example, a weld bond. As a result, even if the upper wall portion of the rear header upper main body portion 23a and the upper wall portion of the rear pillar rain main body portion 13a are arranged apart from each other in the vertical direction, they are connected regardless of the positional accuracy in the vertical direction. The rear header closed cross section (rear header 4) and the rear pillar closed cross section 14 can be connected.

  The front rear header upper flange portion 23b is joined to the front end portion of the rear header inner 21 at the middle portion in the vehicle width direction, and is joined to the front end portions of the pair of left and right hinge rains 22 at the left and right side portions in the vehicle width direction. The rear rear header upper flange portion 23c is joined to the middle portion in the front-rear direction of the rear header inner 21 in the middle portion in the vehicle width direction, and joined to the middle portion in the front-rear direction of the pair of left and right hinge rains 22 in the left-right portion in the vehicle width direction. Has been.

  As shown in FIGS. 4 to 7 and 10, the pair of left and right extending portions 24 includes an extending main body portion 24 a having a substantially U-shaped cross section and a front side extension extending forward from the front end of the extending main body portion 24 a. An installation flange 24b, a rear extension flange 24c extending rearward from the rear end of the extension body 24a, and a plurality of beads 24d are provided. The extended main body portion 24a is disposed at a predetermined distance upward from the rear pillar rain main body portion 13a so as to partially cover the outer periphery of the rear pillar rain main body portion 13a via the space S, and has an outer end portion in the vehicle width direction. Is triple-bonded to the rail portion 1a and the rail portion 2b at the bottom of the groove portion 7.

The front wall portion and the rear wall portion of the extended main body portion 24a are formed so that the overlapping width in the vertical direction covering the front wall portion and the rear wall portion of the rear pillar rain main body portion 13a becomes smaller toward the outside in the vehicle width direction. .
As a result, when stress is transmitted from the rear header upper 23 to the rear pillar rain 13 or from the rear pillar rain 13 to the rear header upper 23, a portion contributing to the stress transmission of both can be gradually reduced, and the stress can be locally reduced. Can be transmitted smoothly without concentrating on.

The front extending flange portion 24b and the rear extending flange portion 24c are spaced upward from the front rear pillar rain flange portion 13b and the rear rear pillar rain flange portion 13c, respectively.
A plurality of, for example, two beads 24d protruding upward are provided on the upper wall portion of the extended main body portion 24a so as to extend in the vehicle width direction. Thereby, even if the vertical lengths of the front wall portion and the rear wall portion of the extended main body portion 24a are made smaller toward the outside in the vehicle width direction, the rigidity of the extended portion 24 can be increased.

Next, the opening 5 will be described.
As shown in FIGS. 1-6, the opening part 5 is comprised so that mounting | wearing with the openable / closable lift gate (not shown) pivotally supported by the upper edge part is possible. The opening 5 is formed by a pair of left and right opening pillars 30 that form side edges, a rear header 4 that forms an upper edge, and a rear end member (not shown) that forms a lower edge. These members cooperate to form a substantially loop-shaped closed cross section. Since the structure of the opening 5 is a substantially bilaterally symmetric structure, the right-side opening 5 will be mainly described below.

  The opening pillar 30 constitutes a substantially straight closed cross-section extending upward and inclined, and includes an opening pillar inner 31 (opening inner), an opening pillar outer 32, and an opening pillar rain 33 (opening rain). Force). The opening pillar inner 31 includes a rear end side portion of the rear side panel 17 and a rear end side portion of the corner plate 16 connected to the upper end of the rear side panel 17.

  As shown in FIGS. 3, 5, 6, and 8 to 11, the opening pillar rain 33 is disposed between the opening pillar inner 31 and the opening pillar outer 32 and cooperates with the opening pillar inner 31. Thus, a substantially straight opening closed section 34 is formed. The opening pillar rain 33 includes an opening pillar rain main body portion 33a bulging outward from the passenger compartment, and an opening portion extending inward and outward from the inner and outer ends of the opening pillar rain main body portion 33a with respect to the center of the opening portion 5, respectively. Pillar rain flange portions 33b and 33c are provided.

As shown in FIGS. 8 to 10, the outer opening pillar rain flange portion 33 c is formed by spot welding in a state where the lower portion is sandwiched between the rear end of the rear side panel 17 and the rear end of the opening pillar outer 32. Triple bonding is performed, and the upper portion is triple bonded by spot welding in a state where the upper portion is sandwiched between the rear end of the corner plate 16 and the rear end of the opening pillar outer 32.
The inner opening pillar rain flange portion 33b has a lower portion spot-joined to the rear side panel 17 and an upper portion triple-joined by spot welding to the corner plate 16 with the rear rear pillar rain flange portion 13c interposed therebetween. Yes.
Thus, the opening closed cross-section portion 34 and the rear pillar closed cross-section portion 14 are disposed adjacent to each other in the front-rear direction, and are connected via the outer opening pillar rain flange portion 33c and the rear rear pillar rain flange portion 13c.

Next, functions and effects of the rear body structure of the vehicle according to the first embodiment will be described.
According to the rear vehicle body structure of the vehicle, the rear header upper 23 and the rear pillar rain 13 can be arranged in an overlapping manner regardless of the vertical positional accuracy between the rear header upper 23 and the rear pillar rain 13, and the rear header closed cross section (rear header 4) And the rear pillar closed cross-section portion 14 can be easily continued, so that it is possible to omit excessive tolerance management and repair processes for correcting misalignment due to variations in member shapes, etc., and improve productivity. can do.
In the vicinity of the opening 5 at the rear of the vehicle body, a closed cross-section portion that extends from the side of the vehicle body to the upper portion of the vehicle body is formed, and an extended portion 24 of the rear header upper 23 that is a component of the closed cross-section portion is formed on the roof panel 1. Since it is joined to the provided groove portion 7 extending in the front-rear direction, the rigidity of the rear portion of the vehicle body can be improved without increasing the cross-sectional area of the rear pillar closed cross-section portion 14 and increasing the number of parts.

The rear pillar rain 13 includes a rear pillar rain main body portion 13a having a substantially U-shaped cross section, and the extending portion 24 includes an extending main body portion 24a having a substantially U-shaped cross section that can partially surround the rear pillar rain main body portion 13a. Therefore, the rear pillar closed section 14 and the rear header 4 can be made continuous with a simple configuration, and the rigidity of the rear pillar closed section 14 can be increased.
Since the extended portion includes extended flange portions 24b and 24c extending in the vehicle longitudinal direction from the vehicle longitudinal direction end portion of the extended main body portion 24a, the rigidity of the rear pillar closed cross-sectional portion 14 is increased by the extended flange portions 24b and 24c. Can be further increased.

Since the bead 24d extending in the vehicle width direction is provided in the extended portion 24, the rigidity of the extended portion 24 improves the rigidity of the connection between the rear header 4 in the vicinity of the opening 5 and the rear pillar closed cross-sectional portion 14 and the groove 7. The rigidity of the rear part of the vehicle body can be further increased.
The extended main body 24a is configured such that the overlapping width in the vertical direction covering the rear pillar rain main body 13a decreases toward the outside in the vehicle width direction. As a result, since the portion contributing to stress transmission from the rear header upper 23 to the rear pillar rain 13 is gradually reduced, the rear header upper 23 and the rear pillar rain 13 can be made continuous without forming a stress concentration portion. it can.

  The opening 5 includes an opening pillar inner 31 and an opening pillar rain 33 that forms an opening closed section 34 that surrounds the periphery of the opening 5 in cooperation with the opening pillar inner 31. Includes opening pillar rain flange portions 33b and 33c, and the outer opening pillar rain flange portion 33c and the rear extending flange portion 24c are joined. Thereby, the opening closed cross-section portion 34 at the periphery of the rear opening portion and the rear pillar closed cross-section portion 14 in the vicinity of the rear opening portion can be joined adjacent to each other in the front-rear direction. The rigidity of the closed cross-section portions 14 and 34 can be further increased.

Next, a modification in which the above embodiment is partially changed will be described.
1) In the above-described embodiment, the example in which two beads protruding upward are provided on the upper wall portion of the extending main body portion. However, one or three or more beads may be provided. A protruding bead may be formed. It is also possible to change the plate thickness or add a reinforcing member.

2] In the above embodiment, the overlapping width in the vertical direction covering the front wall portion and the rear wall portion of the extended main body portion respectively with the front wall portion and the rear wall portion of the rear pillar rain main body portion is made smaller toward the outside in the vehicle width direction. However, it is sufficient that at least the overlapping area of the extended main body portion and the rear pillar rain main body portion is gradually reduced, and the vertical lengths of the front wall portion and the rear wall portion of the rear pillar rain main body portion are increased in the vehicle width direction. You may form so that it may become small.

3) In the above embodiment, the rear pillar inner is constituted by the rear pillar inner panel and the corner plate, but the rear pillar inner may be constituted by a single plate member. Further, the rear pillar inner can be formed by a plurality of plate members.

4] In the above embodiment, an example of a five-door hatchback type vehicle has been described. However, any type of vehicle may be used as long as the vehicle includes at least a groove and a lift gate (back door). Further, it is sufficient that the vehicle has at least a pillar extending upward from the wheel house and a rear header, and a rear end pillar can be separately provided in the vicinity of the opening.

5) In addition, those skilled in the art can implement the present invention in various forms with various modifications without departing from the spirit of the present invention, and the present invention includes such modifications. is there.

  The present invention relates to a rear header upper body in a rear body structure of a vehicle in which a rear header upper section is spaced apart so as to cover at least a part of a rear pillar reinforcement and a rear header closed section and a rear pillar closed section are connected. By connecting the extending portion extending from the outer end portion in the vehicle width direction to the groove portion provided in the roof panel, both the rigidity of the rear portion of the vehicle body and the productivity can be achieved.

DESCRIPTION OF SYMBOLS 1 Roof panel 2 Roof side rail 2a Roof side rail outer 3 Rear pillar 4 Rear header 5 Opening part 7 Groove part 11 Rear pillar inner 13 Rear pillar rain 13a Rear pillar rain main-body part 14 Rear pillar closed cross-section part 21 Rear header inner 23 Rear header upper 24 Extension part 24a Extension body 24b Front extension flange 24c Rear extension flange 31 Opening pillar inner 33 Opening pillar rain 33c Opening pillar rain flange 34 Opening closed cross section V Vehicle

Claims (6)

A rear header closed cross-section portion that is configured by a rear header inner and a rear header upper and that extends in the vehicle width direction above an opening at the rear of the vehicle body, and a rear pillar closed cross-section portion that is configured by a rear pillar inner and a rear pillar reinforcement and extends downward. In the rear vehicle body structure of the vehicle, comprising a groove portion that is formed at a joint portion between the outer end portion in the vehicle width direction of the roof and the inner end portion in the vehicle width direction of the roof side rail outer and that extends upward in the vehicle longitudinal direction.
The rear header inner and the rear pillar inner are connected, and the rear header upper is spaced apart so as to cover at least a part of the rear pillar reinforcement so that the rear header closed cross section and the rear pillar closed cross section are connected. ,
An extending portion is provided extending from the outer end in the vehicle width direction of the rear header upper to the outer side in the vehicle width;
A rear body structure of a vehicle, wherein the extended portion is joined to the groove. The rear pillar reinforcement includes a rear pillar rain main body having a substantially U-shaped cross section,
The rear body structure of the vehicle according to claim 1, wherein the extending portion includes an extending main body portion having a substantially U-shaped cross section that can partially surround the rear pillar rain main body portion.   The rear body structure of the vehicle according to claim 2, wherein the extended portion includes an extended flange portion extending in the vehicle longitudinal direction from an end portion of the extended main body in the vehicle longitudinal direction.   The rear body structure of the vehicle according to any one of claims 1 to 3, wherein a bead extending in a vehicle width direction is provided in the extending portion.   5. The vehicle according to claim 2, wherein the extending portion is configured such that a vertical overlapping width that covers the rear pillar reinforcement becomes smaller toward an outer side in the vehicle width direction. Rear body structure. The opening includes an opening inner and an opening reinforcement that forms an opening closed cross-section surrounding the opening periphery in cooperation with the opening inner;
4. The rear body structure of a vehicle according to claim 3, wherein the opening reinforcement includes an opening rain flange portion, and the opening rain flange portion and the rear extension flange portion are joined to each other.