| 摘要 |
PURPOSE: A wide span movable weir is provided to prevent the torsion of a water gate by the idling of a piston along a gap groove when receiving a resistance by an obstacle in an up or down state. CONSTITUTION: A wide span movable weir includes a water gate, a rotary shaft, a main bracket(30), a passive link, an operation link, a cylinder part, a transverse frame, and a middle cylinder part. A passive link is fixed to a rotary shaft(20) and has a guide groove(45) at a point offset from a rotary center. An operation link(50) forms a protrusion(55) in the facing surface of a passive link. If a cylinder part(60) rotates an operation link, a protrusion pushes a guide groove and a water gate stands up by a hydraulic pressure. If a rotation receives a resistance by the obstacle of the front when a water gate falls, an operation link idles by moving a protrusion along a guide groove.
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