| 摘要 |
PURPOSE:To divide a conventional opening and closing device of a large size one-unit type into a plurality of small size devices, by dividing a conventional power cylinder in the conventional device into an opening and closing cylinder for opening and closing both halves of a hull, and a press-contacting cylinder for pressingly coupling both halves of the hull. CONSTITUTION:There are separately arranged a power cylinder 4 having a long stroke and a small volume, for performing the opening and closing of both halves of a hull 1, and a power cylinder 7 having a short stroke and a large volume, for strongly press-contacting both halves together upon closing. |
