| 摘要 |
PROBLEM TO BE SOLVED: To provide a drain socket making siphon starting sufficiently quick, and also to provide a toilet bowl installation structure using the drain socket. SOLUTION: The drain socket 20 comprises: a first cylinder part 21 into which a drain port 4 is inserted from above; an annular radial part 23 projecting in a diameter reducing direction with respect to the first cylinder part 21; a second cylinder part 22 extending downward from the inner peripheral side of the radial part 23; and an orifice plate 30 or the like locked to the radial part 23 and fixed with an adhesive or the like if necessary. The orifice plate 30 has: an annular part 31 on the outer peripheral side; a short cylindrical annular wall part 32 hanging from the inner peripheral end of the annular part 31; and an annular projecting part 33 connected to the lower end of the annular wall part 32. The projecting part 33 is located in a position lower by the heightΔH portion of the annular wall part 32 than the annular part 31 which is a stepped part. COPYRIGHT: (C)2008,JPO&INPIT
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