| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a waterproofing door device capable of maintaining an upright state of a waterproofing door even if pressure oil to a hydraulic cylinder is leaked by using the hydraulic cylinder to erect the waterproofing door up right. <P>SOLUTION: A base section 22a of a supporting arm 22 is integrally connected to a driving shaft 20, a base section 24a of an oscillation arm 24 connected to a rod section 23a of a first hydraulic cylinder 23 is fixed to the driving shaft 20, a base section 28a of a pivoting arm 28 and a rod section 29a of a second hydraulic cylinder 29 are respectively connected to an intermediate shaft 27 inserted into a slot 26 formed in the front end section 22b of the supporting arm 22, and after the rod section 29a of the second hydraulic cylinder 29 has been moved, the waterproofing door 3 stands up to a standing up position C from a horizontal position A by moving the rod section 23a of the first hydraulic cylinder 23 and, at the same time, the pivoting arm 28 becomes in a straight state to the supporting arm 22. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
