| 摘要 |
PROBLEM TO BE SOLVED: To provide a floor waterproof pan in which drain from a wash place side flowing in a catch basin does not overflow to the installed part side of a bath tub, and drain for the bath tub installation part side does not overflow onto the wash place side. SOLUTION: A wash place side cover part 51 and a bath tub installation part side cover part 52 are arranged into a nearly inverted V-shaped section, and rotationally movably supported centering around an inverted V-shaped summit along the lower end of the part traversing a catch basin of a waterproof wall part 4. A movable cover 5 is provided so that when drain flows in the catch basin 6 from the drain inflow port on the wash place 2 side, by pressure of drain flowing against the wash place side cover part 51, the bath tub installed part side cover part 52 is rotationally moved up to the position closing a drain inflow port 65, and when drain flows in the catch basin 6 from the drain inflow port on the bath tub installed part 3 side, by pressure of drain flowing against the bath tub installed part side cover part 52, the wash place side cover part 51 is rotationally moved up to the position closing the drain inflow port.
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