| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that in case of a heavy rain, the volume of water in a gully body is remarkably increased, so that an opening and closing lid is pushed up to be broken in a street gully proposed heretofore, including an opening and closing lid disposed in the midway of the gully body and opened downward to allow dropping of rainwater and on the other hand restrain entering of a mosquito. SOLUTION: An inclined member 25 is swingably supported by a support shaft 24, and a plumb bob 26 is fitted to one end of the inclined member 25. One end is made higher and the other end lower. In a rainfall, the other end is lowered to promote dropping of rainwater. When the rainwater drops off, the inclined member 25 is returned by the action of the plumb bob 26. In the case of backward drain flow, the inclined member 25 is rotated round the support shaft 24, which allows the drainage to rise. This street gully can inhibit entering of the mosquito, promote dropping of rainwater, and cope with the backward flow of drainage. COPYRIGHT: (C)2005,JPO&NCIPI
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