| 摘要 |
PROBLEM TO BE SOLVED: To reduce the number of parts necessary for a drain coupling and a blind plug and to reduce the number of work processes for replacing devices by a method wherein a wall body for closing a hole of a drain pipe is provided at one end of the drain pipe which has a stopper part having a conical part at its front end formed at the other end thereof with a flange formed at the stopper part side. SOLUTION: For a drain pipe coupling 2 made of an elastic body such as rubber to be held piercingly at a pipe hole of a drain tray main body, a flange part 2a, a trunk part 2b, a stopper part 2c having a conical part at its front end, and a tube hole 2e are respectively formed, and a wall body 2f is formed at the end oposite to the stopper part, 2c. In the case where the drain pipe coupling 2 is used as a blind plug, the wall body 2 is made to develop a function as a plug so that a drain water is not allowed to leak toward the outside. On the other hand when the drain pipe coupling 2 is used as an originally- purposed coupling, the wall body 2f is cut off and a drain hose is held to the tube hole 2e, being inserted through the cut-off end. Thereby, improvement of efficiency in works for attachment and like is accomplished.
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