| 摘要 |
PROBLEM TO BE SOLVED: To keep sanitary state in a bathtub supporting area for a long period by sectioning a floor and the bathtub supporting area, providing a discharge port in each of both the areas and connecting a drain pipe extended from the bathtub with the discharge port provided directly on the bathtub supporting area. SOLUTION: A waterproof pan is sectioned into a floor 2 and a bathtub supporting area 3 and the sectioning part is integrally molded as a partition wall 5 which is at least higher than a water receiving surface 2a of the floor 2. In the floor 2, a drainage ditch 4 of a prescribed depth is formed along the partition wall 5. At the substantial center of a bottom surface of the drainage ditch 4, a discharge port 6 communicating with a drain trap 8 arranged on the lower side is provided. A water receiving surface 3a of the bathtub supporting area 3 partitioned by the partition wall 5 is formed so as to be lower than the floor 2, a flexible drain pipe 13 connected with a discharge port of the bathtub 7 is directly connected with a discharge port 10 formed on the water receiving surface 3a. Water used in the bathtub 7 does not flow into the bathtub supporting area 3 and a sanitary state can be kept for a long period. Inflow of water into the bathtub supporting area 3 can be prevented by the partition wall 5, even when large quantity of water is used in the floor 2 and a water level within the drainage ditch 4 is raised.
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