| 摘要 |
PROBLEM TO BE SOLVED: To sufficiently ensure the rigidity of a resin molded part while minimizing degradation of its appearance even in the case of a large number of reinforcing ribs being formed on the back face of the resin molded part in such an arrangement as to converge almost on one point in the resin molded part of plate shape provided in the external exposed position of a vehicle. SOLUTION: Annular ribs 14 each of which annularly surrounds a converging point P of four reinforcing ribs 12 are formed on a back face 10b of the resin molded part 10 for the vehicle, and the end parts of the respective reinforcing ribs 12 are connected to the annular ribs 14. The number of converging ribs at the mutual connection part of the annular ribs 14 and the respective ribs 12 is set thereby three, so that the cross-section area A of the connection part is restrained from becoming large, and the generation of drawback on the surface of the resin molded part 10 is effectively suppressed.
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