PROBLEM TO BE SOLVED: To provide a canal opening/closing system which reduces the risk of damaging a gate body with power of waves of a high tide or tsunami, and in which a hydraulic fluid is prevented from being leaked and occurrence of environmental issue is also prevented.;SOLUTION: A canal opening/closing system comprises: a gate body 2 including a roller 4 which rolls along a gate guide 1c of a canal 1; and a guide member 6 including at least a substantially vertical part 6a and a substantially horizontal part 6b and guiding a chain 7. The canal opening/closing system further comprises: a hanging hook 16 provided in an upper portion of the gate body 2 and connected to the chain 7 by a pin member 15; and an electric motor 12 for driving a wheel 8 which moves the chain 7 in a reciprocative manner. An inclination guide member 17 is also provided for guiding the roller 4 in such a manner that, with the going stroke movement of the chain 7, the gate body 2 is turned obliquely downwards when the gate body 2 is moved up to a height that is about half of an opening 1a by the substantially vertical part 6a of the guide member 6 and then pulled in backwards by the substantially horizontal part 6b of the guide member 6.;COPYRIGHT: (C)2014,JPO&INPIT
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