JP2014180911A - Vehicle rear structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the rigidity of a rear roof rail while suppressing vehicle body weight.SOLUTION: A vehicle body 11 includes a rear roof rail 20 with a roughly L-shaped cross section composed of a vertical plate 21 and a lower plate 22. The rail includes a hinge fitting part 50 for fitting a hinge 40 for a tail gate. The fitting part includes a bracket 60 and a reinforcement member 70. The bracket is located on the upper surface of the lower plate, and includes a hinge fitting surface part 61 for fitting the hinge, an extension part 62 that extends from the fitting surface part to the vertical plate, and a front end bonded part 66 at the front end of the extension part that is bonded to the vertical plate. The reinforcement member is interposed between the lower plate and the fitting surface part, and includes a reinforcement plate 71 bonded to the lower surface of the fitting surface part. A first closed cross sectional part 81 is formed of the lower plate and the reinforcement member. A second closed cross sectional part 82 is formed of the vertical plate, the lower plate, the extension part, and the reinforcement member. The hinge is attached to the reinforcement plate across the fitting surface part.

Description

  The present invention relates to an improved technique of a vehicle body rear portion structure having a hinge mounting portion for attaching a tailgate hinge to a rear roof rail for supporting a rear end portion of a roof panel.

  There is a vehicle type (for example, a hatchback vehicle) including a tailgate for opening and closing an opening formed on the rear surface of the vehicle body. A hinge that supports the tailgate so as to be opened and closed is attached to the rear roof rail by a hinge attachment portion. The rear roof rail is a member that supports the rear end portion of the roof panel and extends in the vehicle width direction. The technology of the rear roof rail is known from Patent Documents 1 and 2, for example.

  The rear roof rail known in Patent Document 1 is constituted by a single member formed in a substantially L-shaped cross section when the vehicle body is viewed from the side. On the rear roof rail, a bracket for attaching a hinge for supporting the tailgate so as to be opened and closed is provided. Since the rear roof rail supports a tailgate which is a heavy object, it is preferable to increase the rigidity as much as possible.

  On the other hand, the rear roof rail known in Patent Document 2 has a closed cross-sectional structure that is a combination of a rear roof inner and a rear roof outer. A reinforcing member is provided between the rear roof inner and the rear roof outer at a portion where a hinge is attached. The hinge is attached to the rear roof outer and the reinforcing member in an overlapping manner. Accordingly, the tailgate can be supported by the entire rear roof rail having a closed cross section. However, the rear roof rail known in Patent Document 2 has a closed cross-sectional structure and thus has high rigidity, but increases its weight. This is disadvantageous in reducing the weight of the vehicle body.

Japanese Patent Laid-Open No. 9-216573 Japanese Patent Laid-Open No. 11-20611

  An object of the present invention is to provide a technique capable of increasing the rigidity of a rear roof rail that supports a tailgate while suppressing the weight of a vehicle body.

  According to the first aspect of the present invention, in a vehicle body rear structure having a rear roof rail that extends in the vehicle width direction and supports a rear end portion of a roof panel, and a hinge mounting portion that attaches a tailgate hinge to the rear roof rail. The rear roof rail is a member formed in a substantially L-shaped cross section when the vehicle body is viewed from the side, and includes a vertical plate and a lower plate extending rearward from the lower end of the vertical plate, and the hinge mounting portion is A bracket for attaching the tailgate hinge and a reinforcing member for reinforcing the bracket, the bracket extending in the longitudinal direction of the vehicle body and positioned on the upper surface of the lower plate of the rear roof rail, A flat hinge mounting surface for attaching the hinge for the tailgate, a flat extension extending from the hinge mounting surface to the vertical plate, and a front end of the extension The reinforcing member is a member that is interposed between the lower plate of the rear roof rail and the hinge mounting surface portion, and is a lower surface of the hinge mounting surface portion. A first reinforcing cross section having a closed cross section is formed by the lower plate and the reinforcing member, and the vertical plate, the lower plate, the extension portion, and the reinforcement. A second closed cross section having a closed cross section is formed by the member, and the tailgate hinge is attached to the reinforcing plate with the hinge attachment surface portion interposed therebetween, whereby the rear roof rail is interposed via the hinge attachment portion. A vehicle body rear structure characterized by being attached to the vehicle is provided.

  As described in claim 2, preferably, the rear roof rail has a rail flange extending from an upper end of the vertical plate in a vehicle longitudinal direction, and the roof panel is joined to the rail flange, and the bracket of the bracket is The front end joint portion is constituted by a flange that is joined only to the vertical plate.

  According to a third aspect of the present invention, preferably, the reinforcing member is located only directly below the hinge mounting surface portion.

  Preferably, the second closed cross-section portion is adjacent to the first closed cross-section portion and independent from the first closed cross-section portion.

  Preferably, the bracket includes a pair of front side plate portions that extend downward from both ends in the vehicle width direction of the extension portion, and the extension portion and the pair of front side plate portions are used. The vehicle body has a substantially inverted U-shaped cross section when viewed from the rear.

  Preferably, the bracket has left and right lower flanges extending outward in the vehicle width direction from lower ends of the pair of front side plate portions, and the left and right lower flanges are formed on the rear roof rail. It is joined to the lower plate.

  As described in claim 7, preferably, the bracket has a pair of rear side plate portions extending downward from both ends in the vehicle width direction of the hinge mounting surface portion, and the pair of rear side plate portions are A ridge line between the hinge mounting surface portion and the pair of rear side plate portions is continuous with a ridge line between the extension portion and the pair of front side plate portions with respect to the pair of front side plate portions. The vehicle body is continuous in the longitudinal direction.

  As described in claim 8, preferably, the extension portion is formed with a bead extending in the front-rear direction of the vehicle body.

  Preferably, the reinforcing member includes left and right reinforcing side plate portions extending downward from both ends in the vehicle width direction of the reinforcing plate, and an outer side in the vehicle width direction from a lower end of the left reinforcing side plate portion. A left flange extending to the right and a right flange extending outward in the vehicle width direction from a lower end of the right reinforcing side plate portion, and the reinforcing plate, the left and right reinforcing side plate portions, the left flange, and the right flange The left and right flanges are joined to the lower plate of the rear roof rail.

  According to a tenth aspect of the present invention, preferably, the reinforcing member includes front and rear reinforcing side plate portions that extend downward from both ends of the reinforcing plate in the vehicle longitudinal direction, and a front side that extends forward from the lower end of the front reinforcing side plate portion. A flange, and a rear flange extending rearward from a lower end of the rear reinforcing side plate portion, and the vehicle body is laterally moved by the reinforcing plate, the front and rear reinforcing side plate portions, the front flange, and the rear flange. The front flange and the rear flange are joined to the lower plate of the rear roof rail.

  Preferably, the bracket has an electrode insertion hole into which a spot welding electrode can be inserted when the front flange is joined to the lower plate by spot welding.

  In the invention according to claim 1, the bracket of the hinge mounting portion extends in the longitudinal direction of the vehicle body and is positioned on the upper surface of the lower plate of the rear roof rail having a substantially L-shaped cross section. A first closed cross section having a closed cross section is formed by the lower plate of the rear roof rail and the reinforcing member. A second closed cross section having a closed cross section is formed by the vertical and lower plates of the rear roof rail, the extension of the bracket, and the reinforcing member. The tailgate hinge is attached to the rear roof rail via the hinge attachment portion by being attached to the reinforcing plate across the hinge attachment surface portion of the bracket. For this reason, the rigidity and strength of the portion of the rear roof rail that supports the tailgate, which is a heavy object, can be sufficiently increased by the first closed cross section and the second closed cross section. Therefore, the cross-sectional structure of the rear roof rail need not be a closed cross-sectional structure by combining the rear roof inner and the rear roof outer in order to support the heavy tailgate. As a result, the vehicle body weight can be suppressed. Further, the tailgate hinge is attached to the reinforcing plate with the hinge attachment surface portion interposed therebetween. For this reason, a hinge attachment surface part can be reinforced with a reinforcement board. In addition, the load can be efficiently distributed from the hinge to the hinge mounting surface. In this manner, the rigidity and strength of the rear roof rail that supports the tailgate can be increased while suppressing the weight of the vehicle body.

  In the invention which concerns on Claim 2, the front-end joining part of a bracket is comprised by the flange joined only to the vertical board of a rear roof rail. That is, the front end joint portion of the bracket is not joined to the rail flange to which the roof panel is joined. For this reason, the height of the front end of the extension part with respect to the vertical plate can be arbitrarily set. Since the height of the front end of the extension portion can be freely set so that the size of the second closed cross-section portion is optimal, the degree of freedom in vehicle body design is increased.

  In the invention which concerns on Claim 3, the reinforcement member is located only under a hinge attachment surface part. Since the reinforcing member reinforces the hinge mounting surface portion by the reinforcing plate, it is sufficient that the reinforcing member is positioned only directly below the hinge mounting surface portion. For this reason, compared with the case where the reinforcement member is extended in the side of a hinge attachment surface part, for example, a vehicle width direction, a vehicle body weight can be suppressed further.

  In the invention according to claim 4, the first closed cross section and the second closed cross section are adjacent to each other and independent of each other. For this reason, the rigidity and strength of the portion of the rear roof rail that supports the tailgate, which is a heavy object, can be further increased.

  In the invention which concerns on Claim 5, the bracket is formed in the substantially reverse U-shaped cross section by the extension part and a pair of front side board part. For this reason, the rigidity of the bracket itself can be increased.

  In the invention which concerns on Claim 6, the substantially reverse U-shaped cross-section bracket has the lower flange on either side at the lower end. That is, by forming the bracket in a substantially hat-shaped cross section, the rigidity of the bracket itself can be further increased. Furthermore, by joining the left and right lower flanges to the lower plate of the rear roof rail, the rigidity of the rear roof rail can be increased by the highly rigid bracket.

  In the invention according to claim 7, the rear side plate portion extending downward from both ends in the vehicle width direction of the hinge mounting surface portion is continuous in the vehicle longitudinal direction with respect to the front side plate portion extending downward from both ends in the vehicle width direction of the extension portion. doing. In addition, the ridge line between the hinge mounting surface portion and the rear side plate portion is continuous in the vehicle longitudinal direction with respect to the ridge line between the extension portion and the front side plate portion. For this reason, the rigidity of the whole bracket can be further increased.

  In the invention according to claim 8, the extension portion is formed with a bead extending in the front-rear direction of the vehicle body, thereby increasing rigidity. As a result, the rigidity of the bracket itself is increased. The rigidity of the rear roof rail can be increased by the highly rigid bracket.

  In the invention which concerns on Claim 9, the rigidity of this reinforcement member itself can further be increased by forming a reinforcement member in a substantially hat-shaped cross section seeing a vehicle body from back. Further, by joining the left and right flanges to the lower plate of the rear roof rail, the rigidity of the rear roof rail can be increased by the highly rigid reinforcing member.

  In the invention which concerns on Claim 10, the rigidity of this reinforcement member itself can further be increased by forming a reinforcement member in a substantially hat-shaped cross section seeing a vehicle body from the side. Further, by joining the front and rear flanges to the lower plate of the rear roof rail, the rigidity of the rear roof rail can be increased by the highly rigid reinforcing member.

  In the invention according to claim 11, the bracket has an electrode insertion hole. When the hinge mounting portion having the structure in which the reinforcing member is assembled to the bracket is attached to the rear roof rail, the front flange of the reinforcing member is overlapped and joined to the lower plate of the rear roof rail. However, since the reinforcing member is located between the lower plate of the rear roof rail and the bracket, in this state, the front flange is hidden behind the lower plate and the bracket.

  On the other hand, the bracket has an electrode insertion hole into which a spot welding electrode can be inserted when the front flange is joined to the lower plate by spot welding. Therefore, the front flange can be spot welded to the lower plate by the spot welding electrode inserted from the electrode insertion hole. Assembling workability of the hinge mounting portion to the rear roof rail is enhanced. In addition, since the bracket only has the electrode insertion hole, the rigidity of the bracket itself can be sufficiently secured. Moreover, the joining strength of the bracket to the rear roof rail can be ensured by joining the front flange to the lower plate.

It is the perspective view which looked at the rear part of the vehicle concerning the present invention from back. FIG. 2 is a cross-sectional view of a configuration in which a rear end portion of a roof panel and a hinge mounting portion are assembled to the rear roof rail shown in FIG. 1 as viewed from the left side. FIG. 3 is a perspective view of a configuration in which a hinge mounting portion is assembled to the rear roof rail shown in FIG. 2. FIG. 4 is a cross-sectional view of the rear roof rail and the hinge mounting portion shown in FIG. 3 cut in the vehicle longitudinal direction. FIG. 3 is an exploded view of the tailgate hinge, bracket, and reinforcing member shown in FIG. 2. FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 3. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 3.

  EMBODIMENT OF THE INVENTION The form for implementing this invention is demonstrated below based on an accompanying drawing.

  A vehicle body rear structure according to an embodiment will be described with reference to the drawings. "Front", "Rear", "Left", "Right", "Up", "Down" follow the direction seen from the driver, Fr is front, Rr is rear, Le is left, Ri is right , CL indicates the center of the vehicle width.

  FIG. 1 shows the rear part of the vehicle 10. However, the rear end portion of the roof panel 30 is omitted. The vehicle 10 is, for example, a hatchback vehicle including a tailgate 13 for opening and closing an opening 12 formed on the rear surface 11a of the vehicle body 11. The opening 12 is substantially rectangular and is formed large between the left and right rear pillars 14 and 14. A rear roof rail 20 is provided at the rear upper end of the vehicle body 11 so as to be spanned and joined between the upper ends of the left and right rear pillars 14. The rear roof rail 20 is a member that supports the rear end portion of the roof panel 30 and extends in the vehicle width direction. The upper edge of the opening 12 is formed by the rear end of the roof panel 30.

  The left and right tailgate hinges 40, 40 that support the upper end of the tailgate 13 so that it can be opened and closed vertically are attached to the rear roof rail 20 by left and right hinge attachment portions 50, 50. The left and right tailgate hinges 40 and 40 are hereinafter simply referred to as “left and right hinges 40 and 40”.

  As shown in FIGS. 2 to 4, the rear roof rail 20 is a press-molded product of a metal plate, and is a member formed in a substantially L-shaped cross section when the vehicle body 11 is viewed from the side. The rear roof rail 20 includes a flat plate-like vertical plate 21 positioned in the vertical direction and a flat plate-like lower plate 22 extending rearward from the lower end of the vertical plate 21. The rear end of the lower plate 22 is located at the upper edge of the opening 12.

  The rear roof rail 20 has a flat rail flange 23 extending from the upper end of the vertical plate 21 in the longitudinal direction of the vehicle body (forward in this embodiment). A rear end portion 30a of the roof panel 30 is overlapped and joined to the rail flange 23 from above.

  As shown in FIG. 2, the rear end portion 30 a of the roof panel 30 includes a joint portion 31 joined to the rail flange 23, and a substantially flat plate-like first extension portion extending rearward from the joint portion 31 as it is. 32, a vertical plate-like hanging part 33 hanging from the rear end of the first extending part 32, a second extending part 34 extending further rearward from the lower end of the hanging part 33, and the second extending part The rear flange portion 35 is formed at the rear end of the portion 34.

  The first extension portion 32 and the second extension portion 34 face the lower plate 22 of the rear roof rail 20. The hanging portion 33 faces the vertical plate 21 of the rear roof rail 20. The rear flange portion 35 is a flat plate portion that is lower than the second extending portion 34. The rear end of the rear flange portion 35 forms the upper edge of the opening 12. The rear roof rail 20 and the rear end 30a of the roof panel 30 form a closed section 36 having a closed section when the vehicle body 11 is viewed from the side.

  Next, the left and right hinges 40 and 40 and the left and right hinge mounting portions 50 and 50 shown in FIG. 1 will be described in detail. The left and right hinges 40, 40 have the same configuration. The left and right hinge mounting portions 50, 50 have the same configuration. Hereinafter, for the left and right hinges 40, 40 and the left and right hinge mounting portions 50, 50, only the left side members will be described in detail, and the right side members will be omitted.

  As shown in FIG. 2, the left hinge 40 includes a vehicle body side hinge portion 41 attached to the left hinge attachment portion 50, a gate side hinge portion 42 attached to the tailgate 13, and the hinge portions 41, 42. And a hinge pin 43 for connecting the two.

  As shown in FIG. 2, the left hinge mounting portion 50 is located inside a “closed section 36” formed by the rear roof rail 20 and the rear end portion 30 a of the roof panel 30. The left hinge mounting portion 50 includes a bracket 60 for mounting the left hinge 40 and a reinforcing member 70 for reinforcing the bracket 60. The bracket 60 and the reinforcing member 70 are metal plate press-molded products.

  As shown in FIGS. 2 to 8, the bracket 60 is a member that extends in the longitudinal direction of the vehicle body and is positioned on the upper surface of the lower plate 22 of the rear roof rail 20. The bracket 60 includes a hinge mounting surface portion 61 located in the rear half of the lower plate 22, an extension portion 62 located in the front half of the lower plate 22, and a pair of front side plate portions provided on the sides of the extension portion 62. 63, 63, left and right lower flanges 64, 64 on the front side plate portions 63, 63, a pair of rear side plate portions 65, 65 on the side portion of the hinge mounting surface portion 61, and the extension portion 62 And a front end joint portion 66 at the front end 62a.

  The hinge mounting surface portion 61 is a substantially horizontal flat plate portion to which the hinge 40 is mounted. In other words, the hinge mounting surface portion 61 is formed in a substantially rectangular shape in plan view that overlaps the lower surface of the second extending portion 34. Further, the hinge mounting surface portion 61 is substantially parallel to the lower plate 22 and is spaced upward from the upper surface of the lower plate 22.

  The extension portion 62 is a flat plate portion extending from the front end 61 a of the hinge mounting surface portion 61 to the vertical plate 21 of the rear roof rail 20. The extension portion 62 is formed in an upward gradient from the front end 61 a of the hinge mounting surface portion 61 toward the vertical plate 21. The extension 62 is formed with at least one bead 62b, 62b (for example, left and right beads 62b, 62b) extending in the longitudinal direction of the vehicle body. The extension portion 62 has the beads 62b and 62b, thereby increasing rigidity. As a result, the rigidity of the bracket 60 itself is increased. The rigidity of the rear roof rail 20 can be increased by the highly rigid bracket 60.

  As shown in FIG. 8, the pair of front side plate portions 63, 63 extend downward from both ends of the extension portion 62 in the vehicle width direction to the lower plate 22. The bracket 60 is formed by an extension 62 and a pair of front side plate parts 63 and 63 in a substantially inverted U-shaped cross section when the vehicle body 11 is viewed from the rear. For this reason, the rigidity of the bracket 60 itself can be increased.

  The left and right lower flanges 64, 64 extend outward in the vehicle width direction from the lower ends of the pair of front side plate portions 63, 63, overlapped on the lower plate 22 of the rear roof rail 20, and joined by spot welding. Yes. That is, by forming the bracket 60 in a substantially hat-shaped cross section, the rigidity of the bracket 60 itself can be further increased. Furthermore, the rigidity of the rear roof rail 20 can be increased by the highly rigid bracket 60 by joining the left and right lower flanges 64, 64 to the lower plate 22.

  As shown in FIG. 7, the pair of rear side plate portions 65, 65 extends downward from both ends of the hinge mounting surface portion 61 in the vehicle width direction. The lower ends of the pair of rear side plate portions 65, 65 are spaced upward from the lower plate 22 of the rear roof rail 20. This is because the hinge attachment surface portion 61 is supported from below by the reinforcing member 70, so that the lower ends of the pair of rear side plate portions 65, 65 need not be in contact with the lower plate 22.

  Further, as shown in FIGS. 5, 7, and 8, the pair of rear side plate portions 65, 65 are continuous in the vehicle longitudinal direction with respect to the pair of front side plate portions 63, 63. First ridge lines 67 and 67 (corner fold lines 67 and 67) between the hinge mounting surface portion 61 and the pair of rear side plate portions 65 and 65 are formed between the extension portion 62 and the pair of front side plate portions 63 and 63. Continuing in the vehicle longitudinal direction with respect to the second ridgelines 68 and 68 (corner fold lines 68 and 68). For this reason, the rigidity of the entire bracket 60 can be further increased.

  As shown in FIGS. 2, 3, and 5, the front end joint portion 66 includes a flange 66a (first flange 66a) and a pair of flanges 66b and 66b (second flanges 66b and 66b). That is, the front end joint portion 66 is configured by the first flange 66a formed at the front end 62a of the extension portion 62, and further formed at the front ends 63a and 63a of the pair of front side plate portions 63 and 63. A pair of second flanges 66b, 66b is also configured. The first flange 66a and the pair of second flanges 66b and 66b are joined to the vertical plate 21 by spot welding. Particularly preferably, the front end joint portion 66 is joined only to the vertical plate 21 in the rear roof rail 20. The pair of second flanges 66b and 66b are continuous with the left and right lower flanges 64 and 64, respectively.

  As shown in FIGS. 2, 4, and 5, the reinforcing member 70 is a member interposed between the lower plate 22 of the rear roof rail 20 and the hinge mounting surface portion 61. The height of the reinforcing member 70 corresponds to the height from the upper surface of the lower plate 22 to the lower surface of the hinge mounting surface portion 61. The overall shape of the reinforcing member 70 is generally formed in a shape in which a “square plate with a flat bottom, with a hook” is faced down on the upper surface of the lower plate 22.

  As described above, the reinforcing member 70 includes the reinforcing plate 71 corresponding to the flat bottom of the square plate with the hook and the flange portion 72 corresponding to the hook of the square plate with the hook.

  The reinforcing plate 71 is a substantially rectangular flat plate portion joined to the lower surface of the hinge mounting surface portion 61 by spot welding, and is integrally formed with the reinforcing member 70. As described above, the hinge mounting surface portion 61 has substantially the same effect as the configuration in which the plate thickness is increased by integrating the reinforcing member 70 on the lower surface.

  The flange portion 72 is a portion that is joined to the lower plate 22 of the rear roof rail 20, and includes a left flange 72a, a right flange 72b, a front flange 72c, and a rear flange 72d.

  More specifically, as shown in FIGS. 5 to 7, the reinforcing member 70 includes left and right reinforcing side plate portions 73 and 74 extending downward from both ends of the reinforcing plate 71 in the vehicle width direction, and a left reinforcing side. It has a left flange 72a that extends outward in the vehicle width direction from the lower end of the side plate portion 73, and a right flange 72b that extends outward in the vehicle width direction from the lower end of the right reinforcing side plate portion 74. The reinforcing plate 71, the left and right reinforcing side plate portions 73 and 74, the left flange 72a, and the right flange 72b form a substantially hat-shaped cross section when the vehicle body 11 is viewed from the rear. The left flange 72a and the right flange 72b are joined to the lower plate 22 of the rear roof rail 20 by spot welding. As shown in FIG. 3, the rear end portions of the left and right lower flanges 64, 64 of the bracket 60 are overlapped and joined to the front end portion of the left flange 72a and the front end portion of the right flange 72b.

  Further, as shown in FIGS. 5 to 7, the reinforcing member 70 includes front and rear reinforcing side plate portions 75, 76 extending downward from both ends of the reinforcing plate 71 in the vehicle longitudinal direction, and the front reinforcing side plate portion 75. The front flange 72c extends forward from the lower end, and the rear flange 72d extends rearward from the lower end of the rear reinforcing side plate portion 76. The reinforcing plate 71, the front and rear reinforcing side plate portions 75 and 76, the front flange 72c, and the rear flange 72d form a substantially hat-shaped cross section when the vehicle body 11 is viewed from the side. The front flange 72c and the rear flange 72d are joined to the lower plate 22 of the rear roof rail 20 by spot welding. Further, as shown in FIG. 2, the rear flange portion 35 of the roof panel 30 is overlapped with the rear flange 72d from above and joined by spot welding.

  As shown in FIGS. 3 and 7, the reinforcing member 70 is located only directly below the hinge mounting surface portion 61. Since the reinforcing member 70 reinforces the hinge mounting surface portion 61 with the reinforcing plate 71, it is only necessary to be positioned just below the hinge mounting surface portion 61. For this reason, compared with the case where the reinforcement member 70 is extended to the side of the hinge attachment surface part 61, for example, a vehicle width direction, the increase in a vehicle body weight can be suppressed further.

  As shown in FIG. 2, the lower plate 22 and the reinforcing member 70 form a first closed section 81 having a closed section. The vertical plate 21, the lower plate 22, the extension 62, and the reinforcing member 70 form a second closed cross-section portion 82 having a closed cross-section.

  The second closed cross-section portion 82 is adjacent to the first closed cross-section portion 81 and is independent of the first closed cross-section portion 81. For this reason, the rigidity and intensity | strength of the site | part which supports the tailgate 13 which is a heavy article in the rear roof rail 20 can be improved further.

  As shown in FIG. 2, the hinge 40 is attached to the rear roof rail 20 via the hinge attachment portion 50 by being attached to the reinforcing plate 71 with bolts 91 and nuts 92 across the hinge attachment surface portion 61. More specifically, the vehicle body side hinge portion 41 of the hinge 40 is attached to the reinforcing plate 71 with bolts 91 and nuts 92 with the second extending portion 34 and the hinge attachment surface portion 61 interposed therebetween. The lower plate 22 of the rear roof rail 20 is formed with a working through hole 22 a for connecting the bolt 91 and the nut 92.

  The first closed cross section 81 and the second closed cross section 82 are adjacent to each other and independent of each other. For this reason, the rigidity and intensity | strength of the site | part which supports the tailgate 13 which is a heavy article in the rear roof rail 20 can be improved further.

  As described above, the front end joint portion 66 is joined only to the vertical plate 21. That is, the front end joint portion 66 is not joined to the rail flange 23 to which the roof panel 30 is joined. For this reason, the height of the front end of the extension part 62 with respect to the vertical plate 21 can be set arbitrarily. Since the height of the front end of the extension part 62 can be freely set so that the size of the second closed cross-section part 82 becomes optimal, the degree of freedom in vehicle body design increases.

  As shown in FIG. 2, the bracket 60 has an electrode insertion hole into which a spot welding electrode Es (see FIG. 2) can be inserted when the front flange 72c of the reinforcing member 70 is joined to the lower plate 22 by spot welding. 62c. The electrode insertion hole 62 c is a through hole formed in the extension portion 62. The spot welding electrode Es is a known electrode provided in a gun (for example, a spot welding robot gun) of a general spot welding machine (not shown), and includes a fixed electrode and a movable electrode. The spot welding electrode Es is one of a fixed electrode and a movable electrode.

  When the hinge mounting portion 50 having the configuration in which the reinforcing member 70 is assembled to the bracket 60 is attached to the rear roof rail 20, the front flange 72c of the reinforcing member 70 is overlapped and joined to the lower plate 22 of the rear roof rail 20. However, since the reinforcing member 70 is located between the lower plate 22 and the bracket 60, the front flange 72c is hidden behind the lower plate 22 and the bracket 60 as it is.

  On the other hand, in the present invention, as described above, the bracket 60 has the electrode insertion hole 62c into which the spot welding electrode Es can be inserted when the front flange 72c is joined to the lower plate 22 by spot welding. . Therefore, the front flange 72c can be spot welded to the lower plate 22 by the spot welding electrode Es inserted from the electrode insertion hole 62c. Assembling workability of the hinge mounting portion 50 to the rear roof rail 20 is enhanced. In addition, since only the electrode insertion hole 62c is provided in the bracket 60, the rigidity of the bracket 60 itself can be sufficiently secured. Further, by joining the front flange 72c to the lower plate 22, the joining strength of the bracket 60 to the rear roof rail 20 can be ensured.

  The above description is summarized as follows. As shown in FIG. 2, the bracket 60 of the hinge mounting portion 50 extends in the longitudinal direction of the vehicle body and is positioned on the upper surface of the lower plate 22 of the rear roof rail 20 having a substantially L-shaped cross section. The lower plate 22 and the reinforcing member 70 form a first closed cross section 81 having a closed cross section. The vertical plate 21 and the lower plate 22 of the rear roof rail 20, the extension portion 62 of the bracket 60, and the reinforcing member 70 form a second closed cross-sectional portion 82 having a closed cross-sectional shape. The hinge 40 is attached to the rear roof rail 20 via the hinge attachment portion 50 by being attached to the reinforcing plate 71 with the hinge attachment surface portion 61 of the bracket 60 interposed therebetween.

  For this reason, the rigidity and strength of a portion of the rear roof rail 20 that supports the tailgate 13 that is a heavy object can be sufficiently increased by the first closed cross-section portion 81 and the second closed cross-section portion 82. Therefore, the cross-sectional structure of the rear roof rail 20 does not need to be a closed cross-sectional structure by combining the rear roof inner and the rear roof outer as in the prior art in order to support the tailgate 13 which is a heavy object. As a result, the vehicle body weight can be suppressed.

  Further, the hinge 40 is attached to the reinforcing plate 71 with the hinge attachment surface portion 61 interposed therebetween. For this reason, the hinge mounting surface portion 61 can be reinforced by the reinforcing plate 71. In addition, the load can be efficiently distributed from the hinge 40 to the hinge mounting surface portion 61. Thus, the rigidity and strength of the rear roof rail 20 that supports the tailgate 13 can be increased while suppressing the weight of the vehicle body.

  Further, the first closed cross section 81 and the second closed cross section 82 are adjacent to each other and independent of each other. For this reason, the rigidity and intensity | strength of the site | part which supports the tailgate 13 which is a heavy article in the rear roof rail 20 can be improved further.

  The vehicle body rear structure of the present invention is suitable for use in a hatchback vehicle having a tailgate 13 for opening and closing an opening 12 formed in the rear surface 11a of the vehicle body 11.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 11 ... Vehicle body, 13 ... Tailgate, 20 ... Rear roof rail, 21 ... Vertical plate, 22 ... Lower plate, 23 ... Rail flange, 30 ... Roof panel, 30a ... Rear end, 40 ... Hinge for tailgate , 50 ... Hinge mounting part, 60 ... Bracket, 61 ... Hinge mounting surface part, 62 ... Extension part, 62a ... Front end, 62b ... Bead, 62c ... Electrode insertion hole, 63 ... Front side plate part, 64 ... Lower flange, 65 ... Rear side plate part, 66 ... front end joint part, 66a ... flange (first flange), 67 ... ridge line (first ridge line) between the hinge mounting surface part and the rear side plate part, 68 ... extension part and front side plate part Ridge line (second ridge line), 70 ... reinforcing member, 71 ... reinforcing plate, 72a ... left flange, 72b ... right flange, 72c ... front flange, 72d ... rear flange, 73 ... left reinforcing side plate part, 74 ... For right reinforcement Plate portion, 75 ... front of the reinforcing plate portion, 76 ... reinforcing plate portion after, 81 ... first closed cross-section portion, 82 ... second closed cross-section portion, Es ... spot welding electrodes.

Claims (11)

In a vehicle body rear structure having a rear roof rail that extends in the vehicle width direction and supports the rear end portion of the roof panel, and a hinge mounting portion that attaches a hinge for a tailgate to the rear roof rail.
The rear roof rail is a member formed in a substantially L-shaped cross section when the vehicle body is viewed from the side, and includes a vertical plate and a lower plate extending rearward from the lower end of the vertical plate,
The hinge mounting portion includes a bracket for mounting the tailgate hinge, and a reinforcing member for reinforcing the bracket.
The bracket is a member that extends in the longitudinal direction of the vehicle body and is positioned on the upper surface of the lower plate of the rear roof rail, and has a flat hinge mounting surface portion for mounting the tailgate hinge, and the vertical plate from the hinge mounting surface portion. A flat extension extending to the front, and a front end joint formed at the front end of the extension and joined to the vertical plate,
The reinforcing member is a member interposed between the lower plate of the rear roof rail and the hinge mounting surface portion, and has a flat reinforcing plate joined to the lower surface of the hinge mounting surface portion,
The lower plate and the reinforcing member form a first closed cross section having a closed cross section,
The vertical plate, the lower plate, the extension, and the reinforcing member form a second closed cross-section having a closed cross-section,
The rear structure of the vehicle body is characterized in that the tailgate hinge is attached to the rear roof rail via the hinge attachment portion by being attached to the reinforcing plate across the hinge attachment surface portion. The rear roof rail has a rail flange extending in the vehicle longitudinal direction from the upper end of the vertical plate,
The roof panel is joined to the rail flange,
The vehicle body rear part structure according to claim 1, wherein the front end joint portion of the bracket is constituted by a flange joined only to the vertical plate.   The vehicle body rear portion structure according to claim 1, wherein the reinforcing member is located only directly below the hinge mounting surface portion.   The vehicle body rear part structure according to any one of claims 1 to 3, wherein the second closed cross section is adjacent to the first closed cross section and is independent of the first closed cross section. .   The bracket includes a pair of front side plate portions extending downward from both ends of the extension portion in the vehicle width direction, and the extension portion and the pair of front side plate portions substantially reverse U when the vehicle body is viewed from the rear. The vehicle body rear part structure according to any one of claims 1 to 4, wherein the vehicle body rear part structure is formed in a letter-shaped cross section. The bracket has left and right lower flanges extending outward in the vehicle width direction from the lower ends of the pair of front side plate portions,
6. The vehicle body rear structure according to claim 5, wherein the left and right lower flanges are joined to the lower plate of the rear roof rail. The bracket has a pair of rear side plate portions extending downward from both ends in the vehicle width direction of the hinge mounting surface portion,
The pair of rear side plate portions is continuous in the vehicle longitudinal direction with respect to the pair of front side plate portions,
The ridge line between the hinge mounting surface portion and the pair of rear side plate portions is continuous in the vehicle longitudinal direction with respect to the ridge line between the extension portion and the pair of front side plate portions. The vehicle body rear part structure according to claim 5 or 6.   The vehicle body rear part structure according to any one of claims 1 to 7, wherein a bead extending in a longitudinal direction of the vehicle body is formed in the extension portion. The reinforcing member includes left and right reinforcing side plates extending downward from both ends of the reinforcing plate in the vehicle width direction, a left flange extending outward in the vehicle width direction from a lower end of the left reinforcing side plate, and the right reinforcing member. A right flange that extends outward in the vehicle width direction from the lower end of the side plate portion, and is substantially hat-shaped when the vehicle body is viewed from the rear by the reinforcing plate, the left and right reinforcing side plate portions, the left flange, and the right flange. Formed in cross section,
The vehicle body rear part structure according to any one of claims 1 to 8, wherein the left flange and the right flange are joined to the lower plate of the rear roof rail. The reinforcing member includes front and rear reinforcing side plates extending downward from both ends of the reinforcing plate in the vehicle longitudinal direction, a front flange extending forward from a lower end of the front reinforcing side plate, and a rear reinforcing side plate. A rear flange extending rearward from the lower end, and formed by the reinforcing plate, the front and rear reinforcing side plate portions, the front flange and the rear flange in a substantially hat-shaped cross section when the vehicle body is viewed from the side,
The vehicle body rear structure according to claim 9, wherein the front flange and the rear flange are joined to the lower plate of the rear roof rail.   The vehicle body rear structure according to claim 10, wherein the bracket has an electrode insertion hole into which a spot welding electrode can be inserted when the front flange is joined to the lower plate by spot welding. .

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