| 摘要 |
PROBLEM TO BE SOLVED: To provide a drain trap that can be made relatively low in height while allowing outflow water from a first outflow port of a receiving chamber to flow at a sufficient flow rate into a sealing water chamber. SOLUTION: A tunnel-like passage forming member 50 for forming a bathtub drain passage 30 is installed to the bottom face of the sealing water chamber 23. An intermediate part of the passage forming member 50 is formed as a narrow width part 50c narrower in width than the inner diameter of a peripheral wall 21. Both side parts of the narrow width part 50c out of the bottom face of a cover member 23 are respectively formed as low parts 26 lower than the top part 52 of the narrow width part 50c. Each low part 26 is formed such that a region adjoining the narrow width part 50c exists inside the inner peripheral surface of the peripheral wall part 21 and that a region separated from the narrow width part 50c exists outside the outer peripheral surface of the peripheral wall 21 from the top view of the drain tap 10. COPYRIGHT: (C)2011,JPO&INPIT
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