| 摘要 |
PROBLEM TO BE SOLVED: To simplify the structure of water supply equipment and to regulate the timing of closure of a drain valve easily by a simple structure. SOLUTION: The water supply equipment 10 is comprised of the drain valve 14 closing up an outflow port 13 of a tank 11, a first hinge 16 supporting the drain valve 14 at the bottom of the tank 11 so that the valve can swing vertically, a first chain 17 opening the drain valve 14 forcibly, a valve disk raising member 21 inserted under the drain valve 14, a second hinge 22 supporting the valve disk raising member 21 at the bottom of the tank so that the member can swing vertically, in such a manner that it does not obstruct a closing action of the drain valve 14, an arm 23 extended upward from the base part of the valve disk raising member 21 beyond the second hinge 22, a water vessel 24 fixed to the upper part of the arm 23 and having the upper side opened to a regular water surface at a water level inside the tank 11, a small hole made in the bottom of the water vessel and a second chain 27 opening the valve disk raising member 21 forcibly.
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