JP6062044B2 - Car body rear structure - Google Patents

Description

  The present invention relates to a vehicle body rear structure including a rear pillar.

  For example, Patent Document 1 discloses a rear body structure of an automobile including an integrally configured rear pillar inner panel. The lower part of the rear pillar inner panel is joined to the upper part of the rear wheel house outer panel. The rear edge of the rear pillar inner panel is joined to the back door opening reinforcement.

Japanese Patent Application Laid-Open No. 2006-206012

  By the way, when the rear pillar including the other members is integrated, there is an advantage that the number of parts is reduced. However, since the plate thickness is increased to other parts where rigidity and strength are not required, the weight of the vehicle body is accordingly increased. Only increase.

  In addition, if the rear pillar is configured integrally with other members, the integrally molded member itself becomes large and the manufacturing cost increases.

  A general object of the present invention is to provide a vehicle body rear part structure that can be divided and achieved to achieve weight reduction while ensuring rigidity and strength in necessary portions.

In order to achieve the above object, the present invention provides a rear inner panel that constitutes a vehicle interior side panel on the left and right sides at the rear of the vehicle body, and a roof side that extends from the rear inner panel to the vehicle front side above the vehicle body side portion. A vehicle body rear structure having a rail inner, wherein the rear inner panel and the roof side rail inner are configured separately, and the roof side rail inner includes a rail side wall extending in the vertical direction and a lower end of the rail side wall. A rail lower wall extending outward in the vehicle width direction from the rail, and a rail flange extending downward from the vehicle width outer end of the rail lower wall, the rear inner panel extending in the vertical direction in parallel with the rail flange has a side wall, a vehicle width center side panels on walls extending as from the upper end of the panel sidewall along said rail lower wall, the rear inner panel The rear pillar inner panel constituting the tailgate opening and the rear pillar stiffener constituting the rear door opening at the rear of the vehicle body, the rear pillar inner panel and the rear pillar stiffener being constituted by separate members, and the rear pillar inner panel A rear pillar inner reinforcement disposed across the rear pillar stiffener is provided , and includes a rear pillar anchor patch joined to the rear pillar inner panel to form a closed cross section, and a rear end of the rear pillar inner reinforcement is disposed on the rear pillar anchor. The rear pillar inner reinforcement, which is joined to a patch, is provided on a front side of the bead part and a bead part extending from a joint part with the rear pillar anchor patch to the front side of the vehicle, and constitutes the rear door opening flange. Wherein characterized Rukoto which have a and reinforcement flange which is joined to the stiffener flange of the rear pillar stiffener to.

  According to the present invention, the rear inner panel and the roof side rail inner are configured as separate members, so that a member having a thick plate and a material having high rigidity is provided at a portion requiring high rigidity and strength. On the other hand, it is possible to select a member having a small plate thickness or a member having a light material for a portion requiring a weight reduction. As a result, according to the present invention, it is possible to achieve both high rigidity and high strength and light weight by dividing the conventionally integrated rear pillar and arranging the members at appropriate positions.

Furthermore, in the present invention, the ridge line portion provided between the rail lower wall constituting the roof side rail inner and the rail flange is changed by the ridge line portion provided between the panel side wall constituting the rear inner panel and the panel upper wall. It is configured to cover. As a result, the rigidity and strength of the rear pillar can be further increased.
Furthermore, according to the present invention, the rear pillar inner panel and the rear pillar stiffener are configured as separate members, so that a portion requiring a high rigidity and a high strength has a thick member and a high rigidity material. A member can be selected. On the other hand, a member having a small plate thickness or a member having a light material can be selected for a portion that needs to be lightened. As a result, according to the present invention, it is possible to achieve both high rigidity and high strength and light weight by dividing the conventionally integrated rear pillar and arranging the members at appropriate positions.
Furthermore, according to the present invention, the rear end of the rear pillar inner reinforcement is joined to the rear pillar anchor patch constituting the closed cross section, whereby the rigidity and strength of the rear pillar can be further increased.
Furthermore, according to the present invention, the rigidity and strength of the rear pillar stiffener itself can be increased by providing the bead portion. In addition, since the reinforcement flange is joined to the rear door opening flange, the rigidity and strength when the rear pillar stiffener is assembled can be increased.

  Further, the present invention is characterized in that the rear inner panel includes a panel flange that extends upward from a vehicle width inner end portion of the panel upper wall along the rail side wall.

  According to the present invention, the ridge line portion provided between the rail side wall and the rail lower wall constituting the roof side rail inner is the ridge line portion provided between the panel flange constituting the rear inner panel and the panel upper wall. By configuring so as to cover, the rigidity and strength of the rear pillar can be further increased.

  Furthermore, the present invention is characterized in that the panel flange has a first stiff navigating portion and is joined to the rail side wall with the first stiff navigating portion interposed therebetween.

  According to the present invention, by providing the first stiff navigating portion, the rigidity and strength of the panel flange constituting the rear inner panel can be improved.

  Further, according to the present invention, the rear pillar inner reinforcement is disposed and reinforced over the two members including the rear pillar inner panel and the rear pillar stiffener, so that a reduction in rigidity and strength of the divided parts can be suppressed and desired rigidity can be achieved.・ Strength can be secured. As a result, in the present invention, as the entire rear pillar, high rigidity and high strength can be harmonized with light weight.

Furthermore, the present invention is such that the roof side rail inner is joined to upper ends of the rear pillar inner panel and the rear pillar stiffener, respectively , and the roof side rail inner and the rear pillar stiffener are connected to either the rear pillar inner panel or the rear pillar stiffener. A notch portion is provided so that three pieces of the rear pillar inner panel and the rear pillar stiffener do not overlap.

  According to the present invention, it is possible to avoid the overlap of the roof side rail inner, the rear pillar inner panel, and the rear pillar stiffener by providing the notch. Thereby, for example, when the rear outer panel is further overlapped, it is avoided that the four members overlap, and, for example, the bonding force (bonding force) when the overlapping portion is welded (for example, spot welding) is reduced. Can be suppressed.

  Furthermore, the present invention is characterized in that the notch portion is provided in the rear pillar inner panel, and the rear pillar stiffener has a second stiff navigating portion extending in the vertical direction so as to straddle the notch portion.

  According to the present invention, by providing the notch portion in the rear pillar inner panel, the second stiff navigator portion can be extended along the vertical direction. Further, the rigidity and strength of the entire rear pillar stiffener can be improved by extending the second stiff navigator along the vertical direction.

  Furthermore, in the present invention, the rear pillar inner panel is made of a member having a thicker plate thickness or higher rigidity and strength than the rear pillar stiffener, and the rear pillar stiffener includes the panel side wall, the A panel upper wall and the panel flange are provided.

  According to the present invention, the rear pillar inner panel is made thicker than the rear pillar stiffener, or is formed of a member having high rigidity and high strength, so that the panel side wall, the panel upper wall, and the panel flange with respect to the rear pillar stiffener. Can be easily formed, and the formability of the rear pillar stiffener can be improved.

  According to the present invention, it is possible to obtain a vehicle body rear part structure that can be divided and achieved to reduce weight while ensuring rigidity and strength in necessary portions.

It is the perspective view which looked at the vehicle rear part to which the vehicle body rear part structure which concerns on embodiment of this invention was applied from the vehicle interior. FIG. 2 is a partially enlarged perspective view of FIG. 1. FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. It is the perspective view which looked at the vehicle rear part which removed the rear pillar outer panel from the vehicle rear back. FIG. 5A is a partially enlarged perspective view of FIG. 4, and FIG. 5B is a partially enlarged perspective view of FIG. 4A showing a notched portion of the rear pillar inner panel. It is a longitudinal cross-sectional view along the VI-VI line of Fig.5 (a). FIG. 7 is a partially enlarged longitudinal sectional view of FIG. 6. It is the permeation | transmission side view which looked at the upper side of the rear inner panel and the rear pillar stiffener from the vehicle outer side. It is a cross-sectional view along the line IX-IX in FIG. It is a cross-sectional view along the line XX in FIG.

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a perspective view of a rear part of a vehicle to which a vehicle body rear part structure according to an embodiment of the present invention is applied, viewed from the interior of the vehicle, FIG. 2 is a partially enlarged perspective view of FIG. 1, and FIG. It is a cross-sectional view along the line. Note that “front and rear” and “up and down” indicated by arrows in each figure indicate the front and rear direction and vertical direction of the vehicle body, and “left and right” indicate the left and right direction (vehicle width direction) as viewed from the driver's seat. ing.

  As shown in FIGS. 1 and 2, the vehicle 10 includes a pair of rear inner panels 12 and 12 that constitute left and right vehicle interior side panels at the rear of the vehicle body. However, in FIG. 1, only the right rear inner panel 12 is shown, and the left rear inner panel 12 is not shown.

  The pair of rear inner panels 12, 12 includes a pair of rear pillar inner panels 16, 16 and a pair of rear pillar stiffeners 20, 20. The pair of rear pillar inner panels 16 and 16 form a tailgate opening 14 at the rear of the vehicle body. The pair of rear pillar stiffeners 20 and 20 form a rear door opening 18 at the rear of the vehicle body. The rear pillar inner panels 16 and 16 and the rear pillar stiffeners 20 and 20 are formed of different members. The vehicle 10 also includes a roof side rail inner 22 that extends from the rear inner panel 12 toward the front side of the vehicle above the side of the vehicle body. The rear inner panel 12 and the roof side rail inner 22 are configured as separate members.

  The tailgate opening 14 includes a pair of rear pillar inner panels 16 and 16 and a rear roof rail 26. The pair of rear pillar inner panels 16, 16 are opened and closed by a back door (tail gate) (not shown) and constitute a side edge of the tail gate opening 14. The rear roof rail 26 constitutes the upper edge of the tailgate opening 14 and bridges the pair of rear pillar inner panels 16, 16. In FIG. 1, only the rear pillar inner panel 16 on the right side of the vehicle 10 of the pair of rear pillar inner panels 16 and 16 is shown, and the illustration of the left rear pillar inner panel 16 is omitted.

  The rear door opening 18 is formed by a roof side rail inner 22, a center pillar 24, a rear pillar stiffener 20, and the like. The roof side rail inner 22 is opened and closed by a rear door (not shown), joined to the upper ends of the rear pillar inner panel 16 and the rear pillar stiffener 20, and extends toward the front of the vehicle. The rear pillar stiffener 20 is provided on the rear side edge of the rear door opening 18. On the lower side of the rear inner panel 12, there are a rear end panel 28 to which the lower end portion of the rear inner panel 12 is joined, and a rear wheel house inner 30 to which the lower end portions of the rear end panel 28 and the rear pillar stiffener 20 are joined. Arranged.

  The rear pillar inner panel 16 is disposed so as to extend substantially along the vertical direction on the vehicle compartment side. The rear pillar inner panel 16 is integrally joined with a rear pillar outer panel 32 on the vehicle exterior to form a rear pillar. As shown in FIG. 3, the rear pillar outer panel 32 extends in the left-right direction (vehicle width direction) and constitutes the rear surface of the rear pillar. One end portion (outer end portion in the vehicle width direction) along the left-right direction of the rear pillar outer panel 32 is joined to a side outer panel 34 formed separately from the rear pillar outer panel 32.

  As shown in FIG. 2, the rear pillar inner panel 16 has a rear pillar inner panel lower constituting the lower part and a rear pillar inner panel upper constituting the upper part as separate bodies.

  As shown in FIG. 3, a rear pillar anchor patch 36 is provided on the outer side surface of the rear pillar inner panel 16. The rear pillar inner panel 16 and the rear pillar anchor patch 36 constitute a closed cross section 38.

  The closed cross section 38 is formed in a closed cross section in a cross section that is substantially orthogonal to the axis of the rear pillar. The closed cross-sectional portion 38 welds the inclined side wall 16a of the rear pillar inner panel 16 and the one end side 36a on the front side of the rear pillar anchor patch 36, and the vehicle rear end portion 16c of the rear pillar inner panel 16 and the rear pillar anchor patch. The cross section is formed in a substantially triangular shape by joining the 36 rear end portions 36b of the vehicle.

  On the vehicle rear side in FIG. 3, the vehicle body center side end portion 32a of the rear pillar outer panel 32 extending along the left-right direction, the vehicle rear end portion 36b of the rear pillar anchor patch 36, and the vehicle rear end portion 16c of the rear pillar inner panel 16 are provided. The three are joined together.

  4 is a perspective view of the rear portion of the vehicle with the rear pillar outer removed, as viewed from the rear of the vehicle, FIG. 5A is a partially enlarged perspective view of FIG. 4, and FIG. 5B is a cutaway portion of the rear pillar inner panel. FIG. 6 is a partially enlarged perspective view showing the missing portion, FIG. 6 is a longitudinal sectional view taken along line VI-VI in FIG. 5A, and FIG. 7 is a partially enlarged longitudinal sectional view of FIG.

  As shown in FIGS. 4 and 5A, a rear pillar inner reinforcement 40 is provided on the vehicle outer side surface of the rear inner panel 12 so as to straddle the rear pillar inner panel 16 and the rear pillar stiffener 20. The rear pillar inner reinforcement 40 has a substantially rectangular shape when viewed from the side. The front end of the rear pillar inner reinforcement 40 in the vehicle front-rear direction is joined to a stiffener flange 46 described later on the rear pillar stiffener 20. The rear end of the rear pillar inner reinforcement 40 in the vehicle front-rear direction is joined to the rear pillar anchor patch 36 (see FIG. 5A).

  The rear pillar inner reinforcement 40 includes a bead portion 42 and a reinforcement flange 48. The bead portion 42 extends from the joint portion with the rear pillar anchor patch 36 toward the front side of the vehicle body. The reinforcement flange 48 is provided on the front side of the bead portion 42 and joined to a stiffener flange 46 that forms a rear door opening flange 44 in the rear pillar stiffener 20. The stiffener flange 46 is formed of a substantially flat portion, and the bead portion 42 is formed to bulge from the stiffener flange 46 toward the vehicle outer side.

  The vehicle 10 includes a roof side rail inner 22 that extends along the vehicle front-rear direction by joining the upper ends of the rear pillar inner panel 16 and the rear pillar stiffener 20. The roof side rail inner 22 is configured separately from the rear inner panel 12.

  As shown in FIGS. 6 and 7, the roof side rail inner 22 includes a rail side wall 50, a rail lower wall 52, and a rail flange 54. The rail side wall 50 is provided on the upper side and extends in the vertical direction. The rail lower wall 52 extends outward from the lower end of the rail side wall 50 in the vehicle width direction. The rail flange 54 extends downward from the vehicle width outer end portion of the rail lower wall 52. Between the rail lower wall 52 and the rail flange 54, there is provided a first ridge line portion 56 that is curved in a circular arc shape in cross section. Further, a second ridge line portion 58 that is curved in a circular arc shape is provided between the rail lower wall 52 and the rail side wall 50.

  The rear pillar stiffener 20 (rear inner panel) has a panel side wall 60, a panel upper wall 62, and a panel flange 64. The panel side wall 60 extends in the vertical direction in parallel with the rail flange 54. The panel upper wall 62 extends from the upper end of the panel side wall 60 toward the vehicle width center side along the rail lower wall 52. The panel flange 64 extends upward from the vehicle width inner side end portion of the panel upper wall 62 along the rail side wall 50. Between the panel side wall 60 and the panel upper wall 62, the panel 1st ridgeline part 61 formed in the cross-section circular arc shape is provided. In addition, a panel second ridge line portion 63 that is curved in a circular arc shape is provided between the panel upper wall 62 and the panel flange 64.

  The panel flange 64 has a first stiff navigating portion 66 formed to bulge, and is joined to the rail side wall 50 with the first stiff navigating portion 66 interposed therebetween. The panel side wall 60, the panel upper wall 62, and the panel flange 64 are configured to have substantially the same width dimension along the vehicle front-rear direction.

  As shown in FIG. 5, a panel flange 64 joined to the rail side wall 50 of the roof side rail inner 22 is provided at the upper end portion of the rear pillar stiffener 20. A central portion of the panel flange 64 along the vehicle front-rear direction is provided with a first stiff navigator 66 that bulges toward the outside of the passenger compartment. On both sides of the first stiff navigator portion 66 in the vehicle front-rear direction, a first flange portion 68 that is a joint portion with the rail side wall 52 is provided.

  As shown in FIG. 5A, the rear pillar inner panel 16 is provided with a notch portion 70 having a substantially triangular shape. As will be described later, the cutout portion 70 is provided so that three pieces of the roof side rail inner 22, the rear pillar inner panel 16, and the rear pillar stiffener 20 do not overlap. In addition, the broken line part of FIG.5 (b) shows the notch part of the rear pillar inner panel 16. As shown in FIG. In the present embodiment, the rear pillar inner panel 16 is cut out to form the cutout portion 70, but the present invention is not limited to this, and the cutout portion 70 is formed in either the rear pillar inner panel 16 or the rear pillar stiffener 20. May be provided.

  The panel side wall 60 of the rear pillar stiffener 20 has a second stiff navigator 72 that extends in the vertical direction so as to straddle the notch 70. The second stiff navigator 72 is located on the lower side of the first stiff navigator 68 and is formed to bulge toward the vehicle interior side. A second flange portion 74 joined to the rail flange 54 is provided on both sides of the second stiff navigating portion 72 in the vehicle front-rear direction.

  8 is a transparent side view of the upper side of the rear inner panel and the rear pillar stiffener as viewed from the outside of the vehicle, FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 8, and FIG. It is a cross-sectional view along the X-ray.

  As can be understood by comparing FIG. 9 and FIG. 10, the width dimension W1 in the vehicle front-rear direction of the first stiff navigator portion 66 on the upper side is the width in the vehicle front-rear direction of the second stiff navigator portion 72 on the lower side. It is set smaller than the dimension W2 (W1 <W2). When the panel upper wall 62 and the panel side wall 60 have the same width dimension, the width dimension of the first flange portion 68 in the vehicle front-rear direction is determined from the relationship with the width dimension of the first and second stiff navigator portions 66 and 72 The width dimension of the second flange portion 74 in the vehicle front-rear direction is set larger. As a result, in this embodiment, a spot welding allowance for joining the first flange portions 68 provided on both sides of the first stiff navigating portion 66 to the rail lower wall 52 of the roof side rail inner 22 is suitably secured. be able to.

  In addition, the bulging directions (protruding directions) of the first stiff navigator 66 and the second stiff navigator 72 are set in opposite directions inside and outside the vehicle interior. As shown in FIG. 10, in the first stiff navigating portion 66, in order to join the first flange portion 68 to the rail side wall 50, it is necessary to bulge and form outside the vehicle compartment. Further, as shown in FIG. 9, in the second stiff navigating portion 72, it is necessary to bulge and form the vehicle interior side in order to join the second flange portion 74 on the vehicle front side to the side outer panel 34. Thus, the bulging directions of the first and second stiff navigating portions 66 and 72 are set so as to be different from each other corresponding to the mating member to be joined.

  As shown in FIG. 3, the rear pillar inner panel 16 is formed to be thicker than the rear pillar stiffener 20, or is made of a highly rigid and high strength member. On the contrary, the rear pillar stiffener 20 may be thicker than the rear pillar inner panel 16 or may be configured by a member having high rigidity and high strength.

  The vehicle body rear structure 10 according to the present embodiment is basically configured as described above. Next, the function and effect will be described.

  In this embodiment, the rear inner panel 12 and the roof side rail inner 22 are configured as separate members, so that a portion requiring high rigidity and high strength has a thick plate member and a high rigidity material. A member can be selected. On the other hand, a member having a small plate thickness or a member having a light material can be selected for a portion that requires weight reduction. As a result, in this embodiment, even when the rear pillar that has been integrated in the past is divided and configured, an optimal divided configuration is achieved by arranging the members at the right place to achieve high rigidity, high strength, and light weight. And both.

  In the present embodiment, the first ridge line portion 56 provided between the rail lower wall 52 and the rail flange 54 constituting the roof side rail inner 22 is replaced with the panel side wall 60 and the panel upper wall 62 constituting the rear pillar stiffener 20. It is comprised so that it may cover with the panel 1st ridgeline part 61 provided between. As a result, the rigidity and strength of the rear pillar can be further increased.

  Furthermore, in the present embodiment, the second ridge line portion 58 provided between the rail side wall 50 and the rail lower wall 52 constituting the roof side rail inner 22 is replaced with the panel flange 64 and the panel upper wall 62 constituting the rear pillar stiffener 20. It is comprised so that it may cover with the panel 2nd ridgeline part 63 provided between. Thereby, the rigidity and strength of the rear pillar can be further increased.

  Furthermore, in the present embodiment, by providing the first stiff navigator portion 66, the rigidity and strength of the panel flange 64 constituting the rear pillar stiffener 20 can be improved.

  Furthermore, in the present embodiment, the rear pillar inner panel 16 and the rear pillar stiffener 20 are configured as separate members, so that a member having a large plate thickness and a high rigidity material is added to a portion requiring high rigidity and high strength. The member to have can be selected. On the other hand, a member having a small plate thickness or a member having a light material can be selected for a portion that requires weight reduction. As a result, in this embodiment, even when the rear pillar that has been integrated in the past is divided and configured, an optimal divided configuration is achieved by arranging the members at the right place to achieve high rigidity, high strength, and light weight. And both.

  Furthermore, in this embodiment, the rear pillar inner reinforcement 40 is disposed and reinforced over two members including the rear pillar inner panel 16 and the rear pillar stiffener 20. Thereby, the desired rigidity and strength can be ensured by suppressing the decrease in rigidity and strength of the divided parts. As a result, in the present embodiment, it is possible to reconcile high rigidity / high strength and light weight as the entire rear pillar.

  Furthermore, in the present embodiment, the rear end of the rear pillar inner reinforcement 40 is joined to the rear pillar anchor patch 36 constituting the closed cross section, whereby the rigidity and strength of the rear pillar can be further increased.

  Furthermore, in this embodiment, by providing the bead portion 42, the rigidity and strength of the rear pillar stiffener 20 itself can be increased. Further, by joining the reinforcement flange 48 to the rear door opening flange 44, the rigidity and strength when the rear pillar stiffener 20 is assembled can be increased.

  Furthermore, in the present embodiment, by providing the notch portion 70, it is possible to avoid that the roof side rail inner 22, the rear pillar inner panel 16, and the rear pillar stiffener 20 overlap. Thereby, for example, when the rear pillar outer panel 32 is further overlapped, the four members are prevented from being overlapped, and, for example, the joining force (bonding force) when the overlapped portion is welded (for example, spot welding) is reduced. This can be suppressed.

  Furthermore, in the present embodiment, by providing the rear pillar inner panel 16 with the notch 70, the second stiff navigator 72 can be extended in the vertical direction. Moreover, the rigidity and strength of the entire rear pillar stiffener 20 can be improved by extending the second stiff navigator 72 along the vertical direction.

  Furthermore, in this embodiment, the rear pillar inner panel 16 is formed thicker than the rear pillar stiffener 20 or is formed of a member having high rigidity and high strength, so that the panel side wall 60, The panel upper wall 62 and the panel flange 64 can be easily formed, and the formability of the rear pillar stiffener 20 can be improved.

  As a modification of the present embodiment, for example, the rear pillar stiffener 20 may be formed thicker than the rear pillar inner panel 16 or may be formed of a member having high rigidity and high strength. With such a configuration, there is an advantage that the moldability of the rear pillar inner panel 16 can be improved and the weight of the rear pillar inner panel 16 formed of a relatively large panel can be reduced.

10 Vehicle 12 Rear Inner Panel 14 Tail Gate Opening 16 Rear Pillar Inner Panel 18 Rear Door Opening 20 Rear Pillar Stiffener 22 Roof Side Rail Inner 36 Rear Pillar Anchor Patch 38 Closed Section 40 Rear Pillar Inner Reinforce 42 Bead Part 44 Rear Door Opening Flange 46 Stiffener Flange 48 reinforce flanges 50 rail side wall 52 first stiffener bead portion 70 notch rail lower wall 54 rail flange 60 panel side walls 62 the panel on the wall 64 panel flange 66 72 second stiffener bead portion

Claims (6)

A vehicle body rear structure having a rear inner panel that constitutes a vehicle interior side panel on the left and right sides at the rear of the vehicle body, and a roof side rail inner that extends from the rear inner panel to the vehicle front side above the vehicle body side,
The rear inner panel and the roof side rail inner are configured separately.
The roof side rail inner includes a rail side wall extending in the vertical direction, a rail lower wall extending outward in the vehicle width direction from a lower end of the rail side wall, and a rail flange extending downward from the vehicle width outer end of the rail lower wall. Have
The rear inner panel has a panel side wall extending in the vertical direction in parallel with the rail flange, and a panel upper wall extending from the upper end of the panel side wall to the vehicle width center side along the rail lower wall,
The rear inner panel is composed of a rear pillar inner panel that constitutes a tailgate opening and a rear pillar stiffener that constitutes a rear door opening at the rear of the vehicle body,
The rear pillar inner panel and the rear pillar stiffener are composed of separate members,
A rear pillar inner reinforcement disposed across the rear pillar inner panel and the rear pillar stiffener is provided ;
A rear pillar anchor patch that is joined to the rear pillar inner panel to form a closed cross section;
The rear end of the rear pillar inner reinforcement is joined to the rear pillar anchor patch,
The rear pillar inner reinforcement includes a bead portion extending toward a vehicle front side from a joint portion with the rear pillar anchor patch, and a stiffener flange of the rear pillar stiffener provided on the front side of the bead portion and constituting the rear door opening flange. vehicle body rear portion structure according to claim Rukoto which have a and reinforcement flange to be joined to. The vehicle body rear structure according to claim 1,
The rear inner panel includes a panel flange that extends upward from a vehicle width inner side end portion of the panel upper wall along the rail side wall. The vehicle body rear structure according to claim 2,
The panel flange has a first stiff navigating portion and is joined to the rail side wall with the first stiff navigating portion interposed therebetween. The vehicle body rear structure according to claim 1,
The roof side rail inner is joined to upper ends of the rear pillar inner panel and the rear pillar stiffener, respectively.
A vehicle body rear portion characterized in that either one of the rear pillar inner panel or the rear pillar stiffener is provided with a notch so that three pieces of the roof side rail inner, the rear pillar inner panel, and the rear pillar stiffener do not overlap. Construction. The vehicle body rear structure according to claim 4 ,
The notch is provided in the rear pillar inner panel,
The rear pillar stiffener includes a second stiff navigating portion that extends in a vertical direction so as to straddle the cutout portion. The vehicle body rear structure according to claim 1,
The rear pillar inner panel is thicker than the rear pillar stiffener, or is composed of a member having high rigidity and strength,
The vehicle body rear structure, wherein the rear pillar stiffener is provided with the panel side wall, the panel upper wall, and the panel flange.

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