STRUCTURE OF DRAINAGE OPENING FOR WATERPROOF PAN

摘要

PROBLEM TO BE SOLVED: To provide the structure of a drainage opening for a waterproof pan capable of easily removing a drainage lid without forming a protrusion or a hole for hooking a finger. SOLUTION: A drainage opening 6 is formed on the washing place side near a boundary between a wash place 3 and a bath installation place 4, and a drainage lid placing surface for placing a drainage lid is formed at the next lower position than a washing place surface 3a in the top peripheral edge part. In the drainage lid placing surface, a surface 2b to the bath installation place side is an inclined flat surface lowering toward the bath installation place side, and the other surfaces are formed to be the same horizontal surface.