| 摘要 |
PROBLEM TO BE SOLVED: To improve operating efficiency at a time when another drain pipe is connected to a drain pipe, and to reduce the number of required parts. SOLUTION: Drain flow paths 13 and 17 communicating two inflow sections 12 and 16 and one outflow section 15 are installed integrally into the main body section 11 of a drain trap device 10. Curved sections are formed on their midways of the drain flow paths 13 and 17, and trap sections 14 and 18 are formed. The flow-path sectional area of the main drain flow path 13 is set at a large value and that of the sub-drain flow path 17 at a small value, and the terminal of the flow path 17 is connected on the downstream side of the trap section 14 in the flow path 13. A check valve 20 is mounted on the inflow section 16 of the flow path 17. Since the drain trap device 10 does not use another trap device and another one drain pipe can be connected, operating efficiency is improved, and the number of members can be reduced while a usable space in the periphery of the drain pipe can be made wider than conventional devices.
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