Patent ID: 8444199

Claim:
A vehicular box structure comprising: a first side member having an engagement edge provided around substantially an entire periphery of the first side member; and a second side member having a receiving edge where the engagement edge is inserted, the receiving edge being provided around substantially an entire periphery of the second side member, wherein: the receiving edge is formed in substantially uniform thickness around substantially an entire periphery thereof and has a groove formed around substantially an entire periphery thereof where a leading end of the engagement edge is inserted, the engagement edge has a stopper part formed at one side surface toward a basal end side, the stopper part being formed around substantially the entire periphery of the first side member, the groove has a stopper receiving part, which catches the stopper part and is formed toward a basal end side of the groove, on one side inner surface of the groove that corresponds to one side surface of the engagement edge, the stopper receiving part being formed around substantially an entire periphery of the second side member, the stopper receiving part is formed at the leading end of the one side inner surface, both outer surfaces of the receiving edge are so formed as to be flat to inner and outer surfaces of second side member, respectively, and the groove is provided with a press-contact part on another side of the bottom thereof, the press-contact part contacting another side of the leading end of the engagement edge in a pressed manner, so that the stopper part formed on the one side of the engagement edge contacts with the stopper receiving part of the receiving edge in a pressed manner.