| 摘要 |
PROBLEM TO BE SOLVED: To obtain high drainage performance by inclining each drain gutter formed at a washing place section tilted towards a drain port at angles larger than the angles of inclination of the installation of a surface working section or a surface plate of a washing place body. SOLUTION: In the drainage structure of a unit bath by a waterproof pan 5 integrally molded of FRPs, etc., the grade of a gutter section 2 is made larger than that of a rift-like section 1 constituting a surface working section. In the gutter section 2, an upstream section separated from a drain inlet 4 is formed in shallow depth and a downstream section near to the drain inlet 4 in deep depth, and the gutter section 2 is formed so that the grade of the gutter section 2 is made more steep than the rift-like section 1. The gutter section 2 is formed so as to be made deeper than the washing-place base surface 3 of the unit bath, and the downstream section of the gutter section 2 is shaped in depth, in which there is no stepped section between the downstream section and the washing-place base surface 3. Accordingly, the adhesion of mold on a joint, etc., can be prevented effectively.
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