| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a derricking wave breaker which is used for wave breakage in a shallow sea area such as a bay mouth and a port entrance and can secure wave height transmissibility and reduce a wave force. Ž<P>SOLUTION: In the derricking wave breaker 1, a door body 2 is raised diagonally by a buoyancy. The derricking wave breaker includes a stopper device 3 for fixing the door body 2 in a raised state and a fixing/releasing device 4 for releasing the fixing of the door body 2 when the fallen state of the door body 2 is maintained and the door body is raised. The stopper device 3 includes a support rod 3a which is rotatably supported to the base end side and the front end side, raised and swung together with the door body 2, and supports the raised door body 2, a fixed rod 3b which is raised when the support rod 3a is raised and swung, a fixing hook 3c which is engaged with the fixed rod 3b when the rise of the fixed rod is completed to fix the base end side thereof and prevents the support rod 3a at the raised position from falling, and a drive device for the fixing hook for rotating the base end side of the fixed rod 3b to release the engagement of the base end side of the fixing rod by raising and swinging the fixing hook 3c with the base end side of the fixing hook as a fulcrum when the support rod 3a is fallen. An opening 2b is provided to the lower part of the door body 2. Consequently, the wave height transmissibility required can be secured and the wave force can be reduced. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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