| 摘要 |
A drain valve device and a drain valve for a cleaning water tank are disclosed. A drain valve device for a cleaning water tank which stores a cleaning water for cleaning a toilet bowl, comprises a drain valve main body including a supporting shaft extending in a horizontal direction and a valve seat attached to a draining port formed at a bottom surface of the cleaning water tank, and a drain valve including an engaging portion which engages with the supporting shaft and is capable of swinging in a vertical direction, and a valve body, connected with the engaging portion through an extending portion, for carrying out a water discharge and a water stop when contacting with or separating from the valve seat by swinging in a vertical direction. The drain valve main body includes a first projection which projects upwardly, when a conformable drain valve is attached as the drain valve, the drain valve main body enables carrying out a water discharge and a water stop, without the first projection abutting against the conformable drain valve, and when a non-conformable drain valve is attached as the drain valve, the drain valve main body disenables carrying out a water stop, with the first projection abutting against a second projection provided at the non-conformable drain valve.
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