| 摘要 |
PROBLEM TO BE SOLVED: To provide a check valve structure and connected water supply pipe equipment capable of reducing size and weight of a valve structure and reducing load of installation work of the piping equipment. SOLUTION: The check valve 10 of this invention comprises a pipe material 11 constituting a flow channel, an edge frame portion 12 opened to the flow channel and mounted inside of the pipe material, a valve element 14 mounted at one side of the edge frame portion rotatably by a hinge structure, and capable of circulating the fluid substantially only in the direction toward one side by opening and closing the opening part 12a of the edge frame portion by its rotating motion, and a forcible closing means for forcibly closing the opening part of the edge frame portion by pressing the valve element to a edge frame portion side. The forcible closing means has a rotating shaft 16 crossing the flow channel at one side of the valve element, and a pressing portion 17a projecting to the radial direction of the rotating shaft and pressing the valve element to the edge frame portion side in accordance with its rotating attitude. COPYRIGHT: (C)2007,JPO&INPIT
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