JP5741420B2 - Vehicle back door structure - Google Patents

Description

  The present invention relates to a vehicle back door structure.

  Patent Document 1 below discloses a back door structure in which a rear glass is fixed to a back door provided with a resin inner panel and a resin outer panel.

JP 2007-245759 A

  In the above prior art back door structure, when a heavy object such as a wiper is fixed to the inner panel, it is necessary to increase the strength of the inner panel around the fixing portion protruding in a convex shape. In order to increase the strength of the inner panel, for example, ribs or reinforcing metal fittings are added on the back side of the fixed portion protruding in a convex shape.

  However, the fixing part protruding in the convex shape of the inner panel is scattered in an island shape when viewed from the whole inner panel, and there is a weak part between the reinforcing part that supports the rear glass of the inner panel, Cause vibration.

  In view of the above fact, an object of the present invention is to obtain a vehicular back door structure capable of suppressing vibration in the vicinity of a seat surface portion of a door inner to which vehicle-mounted components are fixed.

According to a first aspect of the present invention, a vehicle back door structure includes a door outer panel disposed outside the vehicle, a resin door inner panel disposed inside the vehicle of the door outer panel, the door inner panel, and the door outer panel. A door glass whose lower end is bonded and fixed to the glass mounting portion bonded to each other, and provided on the vehicle lower side of the glass mounting portion of the door inner panel, and extends along the vehicle width direction, and further to the rear of the vehicle A U-shaped reinforcing portion formed to open toward the vehicle, and provided on the vehicle lower side of the reinforcing portion of the door inner panel adjacent to the reinforcing portion, and from the door inner panel to the vehicle front side is formed to protrude, and, together with the pair of left and right side walls are coupled to the lower wall of the reinforcing portion, and a seat surface portion of the vehicle mounting component is fixed, set in the reinforcement portion It is, together with connecting the upper wall and the lower wall of the said reinforcing part with a reinforcing portion, first at the vehicle rear view of at least one disposed on the upper side between the upper side or the left-right pair of the side walls of the side wall 1 rib.

According to a second aspect of the present invention, in the vehicle back door structure according to the first aspect , the first rib is provided above the pair of left and right side walls.

  According to a third aspect of the present invention, in the vehicle back door structure according to the first or second aspect, the depth in the vehicle front-rear direction of the vertical wall of the reinforcing portion disposed at a position adjacent to the seat surface portion is: The depth of the vertical wall of the reinforcing portion arranged at a position other than the position adjacent to the seat surface portion is set shallower than the depth in the vehicle front-rear direction.

According to a fourth aspect of the present invention, in the vehicle back door structure according to the third aspect, the reinforcing portion arranged at a position adjacent to the seat surface portion is provided on the vehicle front side of the vertical wall and on the seat surface portion. It has a pair of upper and lower second ribs formed along the vehicle front-rear direction so as to be continuous with the upper wall and the lower wall of the reinforcing portion disposed at a position other than the adjacent position.

According to the first aspect of the present invention, the lower end portion of the door glass is bonded and fixed to the glass attachment portion where the door inner panel and the door outer panel are joined, and the glass attachment portion of the door inner panel is disposed below the vehicle. A U-shaped reinforcing portion formed so as to open toward the rear of the vehicle extends along the vehicle width direction. The reinforcing portion ensures the support rigidity of the door glass and the rigidity of the entire vehicle back door. In addition, a seat surface portion to which vehicle-mounted components are fixed is provided adjacent to the reinforcement portion on the vehicle lower side of the reinforcement portion in the door inner panel , and the seat surface portion is formed to protrude from the door inner panel to the vehicle front side. The pair of left and right side walls of the seat surface portion are coupled to the lower wall of the reinforcing portion. Further, in the reinforcing portion, at least one first rib that connects the upper wall and the lower wall of the reinforcing portion is disposed on the upper side of the side wall or the upper side between the pair of left and right side walls in the vehicle rear view. . That is, the seat surface portion is provided adjacent to the reinforcement portion extending along the vehicle width direction, and the first rib is provided in the reinforcement portion above the side wall of the seat surface portion or between the pair of left and right side walls. Therefore, there is no weak part of the door inner panel between the reinforcing part and the seat surface part as in the past, and it suppresses the vicinity of the seat surface part of the door inner panel to which the vehicle-mounted parts that are heavy parts are fixed. can do.

According to the second aspect of the present invention, the first ribs connecting the upper wall and the lower wall in the reinforcing portion are respectively provided on the upper side of the pair of left and right side walls of the seat surface portion, and along the vehicle width direction. The extending reinforcing portion and the pair of left and right side walls of the seat surface portion are connected by a pair of left and right first ribs. Thereby, the vibration near the seat surface portion of the door inner panel can be further suppressed.

According to this invention of Claim 3, the depth of the vehicle front-back direction of the vertical wall of the reinforcement part arrange | positioned in the position adjacent to a seat surface part is arrange | positioned in positions other than the position adjacent to a seat surface part Since the vertical wall is shallower than the depth in the vehicle front-rear direction, the length in the vehicle front-rear direction of the first rib connecting the upper wall and the lower wall in the reinforcing portion can be shortened. Thereby, shaping | molding of the reinforcement part provided with the 1st rib becomes easy, and the deformation | transformation at the time of shaping | molding of a reinforcement part is suppressed.

According to this invention of Claim 4, the reinforcement part arrange | positioned in the position adjacent to a seat surface part WHEREIN: The reinforcement part arrange | positioned in positions other than the position adjacent to a seat surface part on the vehicle front side of a vertical wall. A pair of upper and lower second ribs formed along the vehicle front-rear direction so as to be continuous with the upper wall and the lower wall, respectively, are provided, and the upper wall and the lower wall of the reinforcing portion arranged at positions adjacent to the seat surface portion This part does not become shorter than the length in the vehicle front-rear direction of the upper wall and the lower wall of the reinforcing part disposed at a position other than the position adjacent to the seat surface part. That is, the depth in the vehicle front-rear direction of the vertical wall of the reinforcing portion disposed at a position adjacent to the seat surface portion is determined from the depth in the vehicle front-rear direction of the vertical wall of the reinforcing portion disposed at a position other than the position adjacent to the seat surface portion. Even if it is shallow, by providing a pair of upper and lower second ribs, the rigidity of the reinforcing portion at a position adjacent to the seat surface portion can be secured, and the performance of the reinforcing portion as a beam in the vehicle width direction is ensured. be able to.

  According to the vehicle back door structure of the present invention, it is possible to suppress the vibration in the vicinity of the seat surface portion of the door inner panel to which the vehicle-mounted component is fixed.

It is a longitudinal cross-sectional view which shows the rear part of the vehicle to which the vehicle back door structure which concerns on one Embodiment was applied. It is a longitudinal cross-sectional view which shows the reinforcement part vicinity of the inner panel used for the vehicle back door structure shown in FIG. It is a longitudinal cross-sectional view in a position different from FIG. It is a perspective view which shows the reinforcement part of the inner panel used for the back door structure for vehicles shown in FIG. 1, and the seat surface part vicinity adjacent to this. It is a typical longitudinal cross-sectional view which shows the rib in the reinforcement part of the inner panel shown in FIG. FIG. 6 is a schematic longitudinal sectional view showing ribs in the reinforcing portion when the depth in the vehicle front-rear direction of the vertical wall of the reinforcing portion is increased as compared with FIG. 5. It is a longitudinal cross-sectional view which shows the reinforcement part and seat surface part vicinity of the inner panel used for the vehicle back door structure which concerns on a comparative example. It is a perspective view which shows the reinforcement part and seat surface part vicinity of the inner panel used for the vehicle back door structure which concerns on a comparative example.

  Hereinafter, an embodiment of a vehicle back door structure according to the present invention will be described with reference to FIGS. Note that an arrow RR appropriately shown in these drawings indicates the vehicle rear side, an arrow UP indicates the vehicle upper side, and an arrow OUT indicates the vehicle width direction outer side.

  FIG. 1 shows an overall configuration of a back door to which the vehicular back door structure according to the present embodiment is applied. As shown in FIG. 1, a back door 14 for opening and closing an opening (not shown) that opens rearward in the vehicle front-rear direction is provided at the rear end of the vehicle 10. The back door 14 is disposed along the vehicle vertical direction above the rear bumper 12 that extends along the vehicle width direction at the bottom of the vehicle 10. A hinge (not shown) is provided at an upper portion (not shown) of the rear end of the vehicle 10, and an opening (not shown) at the rear end of the vehicle 10 is formed by the back door 14 turning around the hinge. It is designed to be opened and closed.

  The back door 14 includes a door outer panel 20 disposed outside the door (vehicle outside), a door inner panel 22 disposed inside the door (vehicle inside), and a door glass (back) provided on the upper side of the back door 14. Door glass) 24. The door inner panel 22 is formed by a substantially rectangular plate member made of resin, and a window portion 26 opened in a substantially rectangular shape is formed at the center of the upper side of the door inner panel 22. ing. A door glass 24 is attached so as to close the window portion 26.

  The door outer panel 20 includes a plate-like member disposed along the door inner panel 22 on the vehicle lower side of the window portion 26, and extends along the vehicle vertical direction and the vehicle width direction. In the present embodiment, the door outer panel 20 is formed of resin, but may be formed of metal or the like. Further, a spoiler 28 is provided on the vehicle upper side of the window portion 26 on the vehicle rear side of the upper wall portion 22 </ b> A constituting the door inner panel 22. The spoiler 28 is formed so as to protrude convexly toward the rear side of the vehicle, and extends along the vehicle width direction.

  A substantially planar mounting portion 32A extending obliquely downward on the rear side of the vehicle is formed at the rear lower portion of the upper wall portion 22A of the door inner panel 22 (upper edge portion of the window portion 26). A substantially planar mounting portion 28A is provided at the lower rear end of the spoiler 28, and the front surface of the mounting portion 28A is bonded and fixed to the rear surface of the mounting portion 32A of the door inner panel 22 using an adhesive 34. . Further, the front end 28B of the spoiler 28 is joined to the front end 32B of the upper wall portion 22A of the door inner panel 22 by an adhesive or the like (not shown), and thereby the upper wall portion 22A of the door inner panel 22 and the upper wall portion 22A. The spoiler 28 has a closed cross-sectional structure. An upper end portion of the door glass 24 is bonded and fixed to the rear surface of the attachment portion 28 </ b> A of the spoiler 28 with an adhesive 36.

  On the vehicle lower side of the window portion 26, a lower side wall portion 22B that constitutes a lower portion from an intermediate portion of the door inner panel 22 is disposed. A substantially flat mounting portion (glass mounting portion) 40A extending to the vehicle upper side is formed at the upper end portion of the lower side wall portion 22B. A substantially flat mounting portion (glass mounting portion) 20A is formed at the upper end portion of the door outer panel 20, and the front surface of the mounting portion 20A is attached to the rear surface of the mounting portion 40A of the door inner panel 22 using an adhesive 42. It is adhesively fixed (joined) (see FIGS. 2 and 3). The upper end of the mounting portion 20 </ b> A of the door outer panel 20 is bent toward the vehicle front side so as to cover the adhesive 42. The lower end portion of the door glass 24 is bonded and fixed to the rear surface of the mounting portion 20 </ b> A of the door outer panel 20 with an adhesive 36.

  Further, the lower end portion 20B of the door outer panel 20 is joined to the lower end portion 40B of the lower side wall portion 22B constituting the door inner panel 22 by an adhesive or the like (not shown), whereby the lower side wall portion 22B of the door inner panel 22 is formed. The door outer panel 20 has a closed cross-sectional structure. A concave surface 20C that is recessed toward the front side of the vehicle is formed at the center in the vehicle width direction at the middle portion of the door outer panel 20 in the vehicle vertical direction, and the license plate 44 is attached to the concave surface 20C. Yes.

  FIG. 2 is a longitudinal sectional view showing the vicinity of the reinforcing portion 50 formed in the upper portion of the lower side wall portion 22B of the door inner panel 22 in the back door 14. FIG. 3 is a vertical sectional view showing the vicinity of the reinforcing portion 50 and the seat surface portion 70 formed at the upper portion of the lower side wall portion 22B of the door inner panel 22 at a position different from that in FIG. FIG. 4 is a perspective view of the configuration in the vicinity of the reinforcing portion 50 and the seat surface portion 70 formed on the lower side wall portion 22B of the door inner panel 22 as viewed from the front side of the vehicle. As shown in FIGS. 1 to 4, the lower wall portion 22 </ b> B of the door inner panel 22 is provided below the joint portion between the mounting portion 20 </ b> A and the mounting portion 40 </ b> A of the door outer panel 20 to which the door glass 24 is bonded and fixed. The reinforcement part 50 is provided. The reinforcing portion 50 extends along the vehicle width direction on the lower side of the mounting portion 40A of the door inner panel 22. A seat for fixing a wiper mounting member 80 as an example of a vehicle-mounted component (heavy component) at a predetermined position in the vehicle width direction of the reinforcing portion 50 so as to be adjacent to the reinforcing portion 50 below the reinforcing portion 50. A surface portion 70 is provided. On the vehicle front side of the lower side wall portion 22B of the door inner panel 22 is attached a door trim 76 formed in a curved surface shape so as to cover the reinforcing portion 50 and the front surface side of the seat surface portion 70 from above the attachment portion 40A. Yes.

  As shown in FIG. 2, the reinforcing portion 50 has a substantially U-shaped cross section disposed so as to open toward the rear of the vehicle. More specifically, the reinforcing portion 50 includes an upper wall 50A disposed substantially along the vehicle front-rear direction and a substantially vehicle width direction, and a vertical wall disposed so as to bend downward from the front end of the upper wall 50A. A wall 50B and a lower wall 50C arranged to bend substantially from the lower end of the vertical wall 50B to the vehicle rear side (see FIG. 4). By providing the reinforcing portion 50 along the vehicle width direction below the attachment portion 40A of the door inner panel 22 (along the lower side of the door glass 24), the support rigidity of the door glass 24 and the rigidity of the entire back door 14 are improved. At the same time, the entire back door 14 is vibrated in the form of a film, and the generation of a booming noise in the passenger compartment is suppressed.

  As shown in FIGS. 3 and 4, the reinforcing portion 50 is formed in a substantially U-shaped cross section with an upper wall 50 </ b> A, a lower wall 50 </ b> C, and a vertical wall 52 </ b> A at a position adjacent to the seat surface portion 70. The vertical wall 52A is disposed on the vehicle rear side of the vertical wall 50B (see FIG. 2), and the depth of the vertical wall 52A from the rear end of the upper wall 50A (or the lower wall 50C) is the upper wall 50A. (Or lower wall 50C) is formed shallower than the depth of vertical wall 50B from the rear end. A side wall 52B is formed between the vertical wall 52A and the vertical wall 50B (stepped portion) along the vehicle front-rear direction.

  As shown in FIG. 4, the seat surface portion 70 is formed so as to protrude from the vertical wall portion 40 </ b> C of the door inner panel 22 to the vehicle front side. The seat surface portion 70 is formed in a substantially U shape when viewed from the front of the vehicle and is disposed between the seat surface 70A disposed along the vehicle vertical direction, and the peripheral wall of the seat surface 70A and the vertical wall portion 40C on the vehicle rear side. And a side wall 70 </ b> B provided on the side. The upper end of the seat surface 70A and the upper ends of the pair of left and right side walls 70B are coupled to the lower wall 50C of the reinforcing portion 50 (see FIG. 3).

  A through hole 72 is formed in the central portion of the seating surface 70A. As shown in FIG. 3, the wiper mounting member 80 is disposed in a surface contact state on the front surface of the seating surface 70 </ b> A, and bolts 84 are inserted into the through holes 82 of the wiper mounting member 80 and the through holes 72 of the seating surface 70 </ b> A. The wiper mounting member 80 is fastened and fixed to the seat surface portion 70 by screwing the nut 86 into the tip of 84.

As shown in FIGS. 3 and 4, the reinforcing portion 50 is disposed at a position adjacent to the seat surface portion 70 along the vehicle front-rear direction so as to connect the upper wall 50 </ b> A and the lower wall 50 </ b> C within the reinforcing portion 50. Ribs 54 are provided as first ribs . The ribs 54 are arranged in a direction intersecting the rear surface of the vertical wall 52A (a direction substantially orthogonal in the present embodiment). The ribs 54 are respectively disposed on the upper side of the pair of left and right side walls 70B of the seat surface portion 70. By providing the rib 54 above the pair of left and right side walls 70B of the seat surface portion 70, the mounting portion 40A to which the door glass 24 is fixed and the seat surface portion 70 can be connected by the rib 54 in the reinforcing portion 50. It is preferable to form a pair of ribs 54 on the substantially extended line of the pair of left and right side walls 70B. In the present embodiment, the seat surface portion 70 for fixing the wiper mounting member 80 as a vehicle-mounted component (heavy component) is coupled to the lower wall 50C of the highly rigid reinforcement portion 50, and the reinforcement portion 50 and the seat surface portion 70 are connected. By connecting with the ribs 54, the mounting rigidity of the seating surface portion 70 can be increased without changing the material or adding metal reinforcement.

  The rear end 54 </ b> A of the rib 54 is arranged substantially linearly so as to connect the rear surface of the mounting portion 40 </ b> A above the reinforcing portion 50 and the rear surface of the vertical wall portion 40 </ b> C below the reinforcing portion 50. (See FIG. 3). In the resin inner door panel 22, the length of the rib 54 in the vehicle front-rear direction (height of the rib 54 from the vertical wall 52 </ b> A) is limited due to deformation and cooling properties during molding. More specifically, if the length of the rib 54 in the vehicle front-rear direction is too long (the height of the rib 54 from the vertical wall 52A is too high), there is a possibility of causing product deformation at the time of demolding, and the cooling time. Will increase. Therefore, the rib 54 is formed by making the depth of the vertical wall 52A from the rear end portion of the upper wall 50A or the lower wall 50C shallower than the depth of the vertical wall 50B from the rear end portion of the upper wall 50A or the lower wall 50C. The length of the rib 54 at the rear end 54A in the vehicle front-rear direction can be shortened (the height of the rib 54 from the vertical wall 52A can be reduced). This facilitates the molding of the reinforcing portion 50 disposed at a position adjacent to the seat surface portion 70.

  Further, by shortening the length of the rib 54 in the vehicle front-rear direction (reducing the height of the rib 54 from the vertical wall 52A), the rear surface of the mounting portion 40A and the rear surface of the vertical wall portion 40C are connected to the rear end of the rib 54. 54A can be tied in a substantially straight line. That is, the rear end 54A of the rib 54 can be disposed near the ridge line portion between the upper wall 50A and the mounting portion 40A and near the ridge line portion between the lower wall 50C and the vertical wall portion 40C. Accordingly, the ridge line portion between the upper wall 50A and the attachment portion 40A, the ridge line portion between the lower wall 50C and the vertical wall portion 40C, the ridge line portion between the upper wall 50A and the vertical wall 52A, and the lower wall 50C and the vertical wall. The angle change of the ridge line part with 52A can be suppressed, and it is suppressed that the substantially U-shaped cross section of the reinforcement part 50 opens.

As shown in FIGS. 3 and 4, the vertical wall 52 </ b> A of the reinforcing portion 50 disposed at a position adjacent to the seat surface portion 70 is not provided with the seat surface portion 70 (adjacent to the seat surface portion 70. An upper rib 56 and a lower rib 58 are formed along the vehicle longitudinal direction so as to be continuous with the upper wall 50A and the lower wall 50C of the reinforcing portion 50 arranged at a position other than the position. That is, ribs 56 and 58 serving as a pair of upper and lower second ribs that protrude toward the vehicle front side are formed on the front surface portion of the vertical wall 52A of the reinforcing portion 50. Accordingly, the upper wall 50A and the lower wall 50C of the reinforcing portion 50 are partially lowered at a position adjacent to the seat surface portion 70, and the rigidity does not become discontinuous. For this reason, the rigidity of the reinforcement part 50 of a vehicle width direction is securable. In other words, by arranging the lower wall 50C, the rib 56, and the rib 58 on the reinforcing portion 50 at a position adjacent to the seat surface portion 70, the performance of the reinforcing portion 50 as a beam in the vehicle width direction is not impaired, The coupling between the seat surface portion 70 and the reinforcing portion 50 and the rigidity of the reinforcing portion 50 in the vehicle width direction can be made compatible.

  Next, the operation and effect of this embodiment will be described.

  On the vehicle lower side of the door glass 24 and on the lower side of the mounting portion 40A of the door inner panel 22, a reinforcing portion 50 having a substantially U-shaped cross section formed so as to open toward the vehicle rear is along the vehicle width direction. Has been extended. The reinforcing portion 50 secures the support rigidity of the door glass 24 and the rigidity of the entire back door 14, and can suppress the occurrence of a booming sound in the vehicle interior due to the entire back door 14 vibrating in a film shape. Further, a seat surface portion 70 is provided adjacent to the reinforcement portion 50 on the vehicle lower side of the reinforcement portion 50 in the door inner panel 22, and the upper end of the seat surface 70 </ b> A and the upper ends of the pair of left and right side walls 70 </ b> B are the reinforcement portion 50. It is connected to the lower wall 50C. Further, ribs 54 are respectively provided on the upper side of the pair of left and right side walls 70B in the reinforcing portion 50 arranged at a position where the seat surface portion 70 is adjacent. That is, the seat surface portion 70 is provided adjacent to the reinforcing portion 50 on the lower side of the mounting portion 40A of the door glass 24, and a pair of left and right ribs 54 are provided in the reinforcing portion 50 so that the mounting portion 40A and the seat surface portion 70 are ribbed. By connecting with 54, the weak part does not exist between the reinforcement part 50 and the seat surface part 70 like the past, and the vibration of the back door 14 near the seat surface part 70 of the door inner panel 22 can be suppressed. Thereby, the attachment rigidity of the seat surface part 70 can be improved, without adding a change of a material or metal reinforcement.

  Further, the back door 14 is provided by providing a pair of left and right ribs 54 so as to connect the upper wall 50A and the lower wall 50C in the reinforcing portion 50 on the upper side of the pair of left and right side walls 70B of the seat surface portion 70 in a rear view of the vehicle. The vibration in the vicinity of the seat surface portion 70 of the door inner panel 22 can be further suppressed.

  Further, the depth of the vertical wall 52A from the rear end portion of the upper wall 50A (or lower wall 50C) at a position adjacent to the seat surface portion 70 is such that the vertical wall from the rear end portion of the upper wall 50A (or lower wall 50C). By being shallower than the depth of 50B, the length in the vehicle front-rear direction of the rib 54 connecting the upper wall 50A and the lower wall 50C in the reinforcing portion 50 can be shortened. Thereby, shaping | molding of the reinforcement part 50 provided with the rib 54 becomes easy.

This will be described more specifically with reference to FIGS.
FIG. 5 schematically shows the rib 54 in the reinforcing portion 50 when the longitudinal wall 52A of the reinforcing portion 50 has a small depth in the vehicle front-rear direction. As shown in FIG. 5, the rear end 54 </ b> A of the rib 54 is substantially straight so as to connect the rear surface of the mounting portion 40 </ b> A on the upper side of the reinforcing portion 50 and the rear surface of the vertical wall portion 40 </ b> C on the lower side of the reinforcing portion 50. Arranged in a shape. In the resin inner door panel 22, the length of the rib 54 in the vehicle front-rear direction (height of the rib 54 from the vertical wall 52 </ b> A) is limited due to deformation and cooling properties during molding. That is, if the length of the rib 54 in the vehicle front-rear direction is too long (the height of the rib 54 from the vertical wall 52A is too high), product deformation may occur at the time of demolding, and the cooling time increases. Therefore, the depth of the rib 54 is reduced by making the depth of the vertical wall 52A from the rear end portion of the upper wall 50A or the lower wall 50C smaller than the depth of the vertical wall 50B from the rear end portion of the upper wall 50A or the lower wall 50C. The length of the rear end 54A in the vehicle front-rear direction can be shortened (the height of the rear end 54A of the rib 54 from the vertical wall 52A can be reduced). As a result, it is possible to reduce the deformation of the product when the reinforcing part 50 is removed from the mold or to increase the cooling time, and it becomes easy to form the reinforcing part 50 at a position adjacent to the seat surface part 70.

  Further, by shortening the length of the rib 54 in the vehicle front-rear direction (reducing the height of the rib 54 from the vertical wall 52A), the rear surface of the mounting portion 40A and the rear surface of the vertical wall portion 40C are connected to the rear end of the rib 54. 54A can be tied in a substantially straight line. Accordingly, the rear end 54A of the rib 54 can be disposed in the vicinity of the ridge line portion between the upper wall 50A and the attachment portion 40A and in the vicinity of the ridge line portion between the lower wall 50C and the vertical wall portion 40C. Accordingly, the ridge line portion between the upper wall 50A and the attachment portion 40A, the ridge line portion between the lower wall 50C and the vertical wall portion 40C, the ridge line portion between the upper wall 50A and the vertical wall 52A, the lower wall 50C and the vertical wall. The angle change of the ridge line part with 52A can be suppressed, and it can suppress that the substantially U-shaped cross section of the reinforcement part 50 opens.

  On the other hand, in FIG. 6, the rib 90 in the reinforcement part 50 in case the depth of the vertical wall 50B of the reinforcement part 50 in the vehicle front-back direction is larger than the depth of the vertical wall 52A shown in FIG. It is shown in the block diagram. As shown in FIG. 6, in the reinforcing portion 50, the length of the rib 90 in the vehicle front-rear direction is shortened (the height of the rib 90 from the vertical wall 50B is lowered) in order to reduce deformation and the like during molding. ing. In this case, the rear end 90A of the rib 90 is disposed inside the reinforcing portion 50 from the rear surface of the attachment portion 40A and the rear surface of the vertical wall portion 40C. In such a rib 90, the rear end 90A of the rib 90 cannot be disposed in the vicinity of the ridge line portion between the upper wall 50A and the mounting portion 40A and in the vicinity of the ridge line portion between the lower wall 50C and the vertical wall portion 40C. There is a possibility that a change in the angle of the ridge line portion becomes large, and a deformation that causes the substantially U-shaped cross section of the reinforcing portion 50 to open occurs.

  Therefore, as shown in FIG. 5, by arranging the rear end 54A of the rib 54 in a substantially straight line so as to connect the rear surface of the mounting portion 40A and the rear surface of the vertical wall portion 40C, the upper wall 50A and the mounting portion 40A. It is possible to suppress a change in the angle of the ridgeline portion between the lower wall 50C and the vertical wall portion 40C, and to prevent the substantially U-shaped cross section of the reinforcing portion 50 from opening.

  Further, as shown in FIGS. 3 and 4, the vehicle is located on the vehicle front side of the vertical wall 52 </ b> A of the reinforcing portion 50 arranged at a position adjacent to the seat surface portion 70, except for a position adjacent to the seat surface portion 70. A pair of upper and lower ribs 56 and 58 are formed along the vehicle front-rear direction so as to be continuous with the upper wall 50A and the lower wall 50C of the reinforcing portion 50, respectively. Accordingly, the upper wall 50A and the lower wall 50C of the reinforcing portion 50 are partially lowered at a position adjacent to the seat surface portion 70, and the rigidity does not become discontinuous. For this reason, the rigidity of the reinforcement part 50 of a vehicle width direction is securable. In other words, by arranging the lower wall 50C, the rib 56, and the rib 58 on the reinforcing portion 50 at a position adjacent to the seat surface portion 70, the performance of the reinforcing portion 50 as a beam in the vehicle width direction is not impaired, The coupling between the seat surface portion 70 and the reinforcing portion 50 and the rigidity of the reinforcing portion 50 in the vehicle width direction can be made compatible.

  FIGS. 7 and 8 show the reinforcing portion and the vicinity of the seat surface portion of the door inner panel used in the vehicle back door structure of the comparative example. As shown in FIGS. 7 and 8, the back door 100 includes a reinforcing portion 102 having a substantially U-shaped cross section that is disposed on the vehicle lower side of the mounting portion 40 </ b> A of the door inner panel 22 so as to open toward the rear of the vehicle. It has. That is, the reinforcing portion 102 includes an upper wall 50A, a vertical wall 50B, and a lower wall 50C, and extends along the vehicle width direction. The door inner panel 22 includes a substantially planar vertical wall portion 40 </ b> C on the vehicle lower side of the reinforcing portion 102. A seat surface portion 104 protruding in a convex shape on the vehicle front side is provided at a position away from the reinforcing portion 102 in the vertical wall portion 40C. Although illustration is omitted, a plurality of the seat surface portions 104 are arranged at predetermined positions in the vehicle width direction.

  The seat surface portion 104 includes a substantially circular seat surface 104A when viewed from the front of the vehicle, and a substantially cylindrical side wall 104B extending from the periphery of the seat surface 104A to the vertical wall portion 40C. The side wall 104B is formed so that the outer diameter gradually decreases from the vertical wall portion 40C toward the seating surface 104A. A through hole 72 is provided at the center of the seat surface 104A, and a wiper mounting member 80 is fastened and fixed to the front surface of the seat surface 104A by bolts 84 and nuts 86 (see FIG. 7).

  In such a back door 100, the seat surface portion 104 is arranged in an island shape on the vertical wall portion 40 </ b> C away from the reinforcing portion 102 in the vehicle front view, and a weak portion is provided between the reinforcing portion 102 and the seat surface portion 104. There is a planar vertical wall portion 40C. For this reason, when the wiper mounting member 80 which is a vehicle-mounted component (heavy component) is fastened and fixed to the seat surface portion 104, it tends to cause vibration.

  On the other hand, in the back door 14 according to the present embodiment, the seat surface portion 70 is provided adjacent to the reinforcement portion 50 extending along the vehicle width direction, and the reinforcement portion 50 is provided above the side wall 70B of the seat surface portion 70. By providing a pair of left and right ribs 54 that connect the inner upper wall 50A and the lower wall 50C, there is no weak portion between the reinforcing portion 50 and the seat surface portion 70, and the seat of the door inner panel 22 in the back door 14 is provided. Vibration in the vicinity of the surface portion 70 can be suppressed.

  In the present embodiment, the ribs 54 in the reinforcing portion 50 are respectively provided on the substantially extended lines on the upper side of the pair of left and right side walls 70B of the seat surface portion 70, but the present invention is not limited to this. At least one rib may be provided on the upper side between the pair of left and right side walls 70B of the seat surface portion 70. Further, a pair of left and right ribs may be provided on the upper side between the pair of left and right side walls 70B of the seat surface portion 70 as viewed from the rear of the vehicle. Further, a pair of left and right ribs may be provided slightly above the pair of left and right side walls 70B of the seat surface portion 70 in the vehicle width direction as viewed from the rear of the vehicle. Furthermore, the number of ribs connecting the upper wall 50A and the lower wall 50C in the reinforcing portion 50 is not limited to one or two, and two or more ribs may be provided.

  Further, in this embodiment, the wiper mounting member 80 as a vehicle mounting component (heavy component) is fastened and fixed to the seat surface portion 70, but is not limited to this, and other vehicle mounting components (for example, a dynamic damper or the like). The mounting member may be fastened and fixed.

  Moreover, in this embodiment, although the back door 14 which formed both the door outer panel 20 and the door inner panel 22 with resin was used, it is not limited to this, You may make only the door inner panel 22 into resin.

10 Vehicle 14 Back door 20 Door outer panel 20A Mounting portion (glass mounting portion)
22 Door inner panel 22B Lower side wall (door inner panel)
24 door glass 36 adhesive 40A mounting part (glass mounting part)
42 Adhesive 50 Reinforcement part 50A Upper wall 50B Vertical wall (Vertical wall arrange | positioned except the position adjacent to a seat surface part)
50C Lower wall 52A Vertical wall (longitudinal wall arranged at a position adjacent to the seat surface)
54 Rib 54A Rear end 56 Rib 58 Rib 70 Seat surface portion 70B Side wall 80 Wiper mounting member (vehicle-mounted component)

Claims (4)

A door outer panel disposed outside the vehicle;
A resin door inner panel disposed inside the vehicle of the door outer panel;
A door glass whose lower end is bonded and fixed to a glass mounting part that joins the door inner panel and the door outer panel;
A reinforcing part having a U-shaped cross section, which is provided on the vehicle lower side of the glass attachment part in the door inner panel, extends along the vehicle width direction, and is further formed to open toward the rear of the vehicle,
The door inner panel is provided on the vehicle lower side of the reinforcing portion adjacent to the reinforcing portion , protrudes from the door inner panel to the vehicle front side, and a pair of left and right side walls are lower walls of the reinforcing portion. And a seat surface portion to which vehicle-mounted components are fixed,
The reinforcing portion is provided in the reinforcing portion, and connects the upper wall and the lower wall of the reinforcing portion in the reinforcing portion, and is disposed on the upper side of the side wall or between the pair of left and right side walls in a rear view of the vehicle. At least one first rib;
A backdoor structure for a vehicle. The vehicle back door structure according to claim 1, wherein the first rib is provided on an upper side of the pair of left and right side walls.   The depth in the vehicle front-rear direction of the vertical wall of the reinforcing portion disposed at a position adjacent to the seat surface portion is the vehicle front-rear direction of the vertical wall of the reinforcing portion disposed at a position other than the position adjacent to the seat surface portion. The vehicle back door structure according to claim 1, wherein the vehicle back door structure is set to be shallower than the depth of the vehicle. The reinforcing portion disposed at a position adjacent to the seat surface portion includes, on the vehicle front side of the vertical wall, the upper wall and the lower wall of the reinforcing portion disposed at a position other than the position adjacent to the seat surface portion. The vehicle back door structure according to claim 3, further comprising a pair of upper and lower second ribs formed along the vehicle longitudinal direction so as to be continuous with the wall.

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