| 摘要 |
PURPOSE:To prevent water from being stored in a bath tub mounting section and prevent mildew and bad smell from being generated by a method wherein a washing place section is provided with a drainage section, and wherein a drainage ditch connected to the drainage port of a bath tub is inserted through the bottom section external-side of a floor pan, to be connected to the drainage section, and wherein the bath tub mounting section is provided with an auxiliary drainage ditch communicated with the drainage section and provided with a check valve. CONSTITUTION:On a washing place 3, a drainage port 5 is fitted, and on a bath tub mounting section 4, a bath tub 6 is mounted, and its bottom section is provided with a bath tub drainage port 7, and is connected to the drainage port 5 with a drain pipe 8 fitted on the bath tub mounting section 4. Besides, the bath tub mounting section 4 is provided with an auxiliary drain pipe 9 connected directly to the drain pipe 8 and communicated with the drainage port 5, and on the way, a check valve 10 is set so that reverse current cannot be generated from the drain pipe 8. When leakage water is generated from the side of the bath tub 6 and when a lot of drain is suddenly generated from the side of the washing place 3 and flows into the side of the bath tub mounting section 4, then it is drained to the drainage port 5 by the auxiliary drain pipe 9. Besides, the check valve 10 is set, and even when water is discharged from the bath tub 6, then it does not flow reversely to the side of the bath tub mounting section 4. |
