| 摘要 |
PROBLEM TO BE SOLVED: To provide a compact gate with no gateposts opening/closing apparatus for opening/closing a gutter gate and an irrigation gate of a river, which can reliably open/close a channel and which can sweep out impurities accumulated in the lower section of the channel.SOLUTION: A gate with no gateposts opening/closing apparatus 10 includes a door body 20 and an opening/closing mechanism 30 which opens/closes the door body 20. In the opening/closing mechanism 30, a double-acting first hydraulic cylinder 33 for rotating the door body 20, and a double-acting second hydraulic cylinder 34 for moving the door body 20 in an approximately perpendicular direction and performing a sand scouring operation are rotatably provided in the door body via a torque arm 32. |
