| 摘要 |
PROBLEM TO BE SOLVED: To provide a tide gate being constructible at very low cost while at the same time solving technical problems of various gates currently in development and use, from the standpoint of their own advantages and disadvantages. SOLUTION: The tide gate is very inexpensive and easy to handle and can achieve economical efficiency equivalent to those of rubber dams by continuously supporting external forces by means of an air bag 4 in the width direction of the gate, while utilizing the advantages of a conventional tide gate constructed of a steel door 11: that it is resistant to external forces (hydraulic forces and impact forces received from flowing matter); that it has wear resistance; and that it is stable even in an intermediate upstanding attitude.
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