| 摘要 |
PROBLEM TO BE SOLVED: To provide a water cutoff device which is excellent in waterproofness and pressure resistance, also excellent in installation property and storability, while avoiding the enlargement in size.SOLUTION: A water cutoff device which seals a gateway G of an underground facility, comprises: a cutoff door 10 which is arranged above the gateway G, and seals the gateway G by being descended in use; and drive means 20 which at least descends the cutoff door 10. The cutoff door 10 has an upper door 11 supported to an upper part of the gateway G so as to be turnable, and a lower door 12 connected to a lower end of the upper door 11 by a hinge 13, and is held to an upper part of the gateway G in a state of being folded via the hinge 13. When the cutoff door is descended by the drive means 20, the upper door 11 and the lower door 12 seal the gateway G by being linearly deployed. |
