| 摘要 |
PROBLEM TO BE SOLVED: To speedily an safely execute piling operation by integrally forming engaging parts to be engaged with each other at the time of loading a bathtub on the rear surfaces of a bathtub main body and a washing place part. SOLUTION: Concerning the bathtub consisting of synthetic resin material, the engaging parts 5 regulating the positional deviation of an upper bathtub to a lower bathtub by engaging each other at the time of piling the normally faced bathtub on a vertically inverted bathtub are provided on the rear surfaces of the bathtub main body 1 and the plane-shaped washing place part 3. Namely, first projecting pieces 4a and 4b nearly trapezoidal by a side surface view are formed at first and second reinforcing ribs 11 and 12 project on the rear surface of the main body 1 and thierd projecting pieces 4d and 4e nearly trapezoidal by a side surface view are formed at a position opposed to the pieces 4a and 4b of a forth reinforcing rib 31 projected on the rear surface of the part 3. Then the part 5 consisting of a recessed groove 50 is formed at the play tip parts of the first projecting pieces 4a and 4b and the third projecting pieces 4d and 4e. |
