| 摘要 |
A cover of drainage having an opening and closing unit of drainage holes is provided to open the drainage naturally, and to maintain the clogged state of the drainage holes by closing the drainage holes of the cover through an opening and closing part of a wing part. A body(10) has an inner space(11) to collect the discharged water. A discharging hole(12) is formed to one side of the body to discharge the discharged water to the outside. A cover is formed to the upper part of the body under predetermined weight. The cover has drainage holes. A lower surface of the cover has a shaft fixing part having a shaft hole. An opening and closing part of a wing part has an operating shaft fitted in the shaft hole of the shaft fixing part. The opening and closing part closes the drainage holes of the cover by weight of the weight part. |
