| 摘要 |
PROBLEM TO BE SOLVED: To cover a bathtub with an existing bath lid by forming the surface level of a flange part forming a bathtub opening part in such a state as differentiating the height of a washing space from the depth side, forming its prescribed range into a recess bent surface, and specifying it as an overflow part. SOLUTION: A surface level of a flange part of the circumferential side wall forming a bathtub opening part is so formed as appropriately differentiating the height of the surface level in a washing space side flange < the circumferential side wall opposed thereto as the surface level in the depth side flange part, and the washing space side flange part 11 is set to an overflow part. This level difference allows the hot water in the bathtub 1 to overflow from only the washing space side flange part 11 and eliminate the flooding into the other flange part. An overflow part 2 forming a recess bent surface in the length direction is formed in an appropriate range. This constitution can prevent (the dirt caused by scale, etc., on the inside wall face of the bath room formed by the overflow and prevent water infiltration into a cavity between the wall surface W of the bath room and the depth side flange part 12. |
