| 摘要 |
PROBLEM TO BE SOLVED: To provide a cut-off device capable of simply changing a cut-off height depending on the quantity of water urged to intrude.SOLUTION: A cut-off device includes a pair of cut-ff door support parts which are provided on both sides of a doorway, and vertically-multitiered cut-off doors which are each independent and which cut off the doorway by having a one end-side supported in such a manner as to be rotatable on a support shaft provided on the one cut-off door support part and having the other end-side locked to the other cut-ff door support part. In the cut-off device, the one cut-ff door support part has a support part for supporting each of the vertically-multitiered cut-off doors from below. |
