| 摘要 |
PROBLEM TO BE SOLVED: To obtain a back door attachment structure which can suppress an increase of a mass and cost by improving the rigidity of a hinge attachment part without enlarging a plate thickness.SOLUTION: In a door inner panel 20 and a hinge reinforcement 24, offset faces 20D, 24B which protrude to a vehicle rear side with respect to hinge attachment seat faces 20C1, 24A1 are formed around hinge attachment seat parts 20C, 24A. By this constitution, wall parts 20E, 24C which connect both the offset faces 20D, 24B and the hinge attachment seat parts 20C, 24A in a vehicle width direction are arranged between the offset faces and the hinge attachment seat parts, and inclined wall parts 20G, 24E which connect the offset faces 20D, 24B and general parts 20F, 24D in a vehicle vertical direction are arranged between the offset faces and the general parts. As a result, in the door panel 20 and the reinforcement 24, the rigidity of a hinge attachment part 32 can be improved without enlarging a plate thickness. |
