| 摘要 |
PROBLEM TO BE SOLVED: To provide a water supply apparatus for firm field so designed that foreign matters are difficult to accumulate in a conduit, and the accumulated foreign matters are easy to be removed from the conduit. SOLUTION: The water supply apparatus 1 for firm field has the following mechanism: a butterfly valve 3 is rotated via a worm 8, a worm wheel 10 and a shaft member 4 when a rotary shaft of a drive motor 6 rotates in a forward direction; water dammed by the butterfly valve 3 is passed through space between the butterfly valve 3 and the inner wall surface of a conduit tube 2, flows downstream through a flow path 2a to be released into firm field 60; and the butterfly valve 3 is rotated by about 90°via rotational drive of the drive motor 6 followed by being stopped. The water supply device 1 has the following structure: a swing plate 5a of a pedestal plate 5 is freely swung with a focus on an installing member 15; the worm wheel 10 and the shaft member 4 are manually rotated so as to freely rotate the butterfly valve 3 in the conduit tube 2 because the worm 8 can be separated from the worm wheel 10. COPYRIGHT: (C)2005,JPO&NCIPI
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