WATER CUT-OFF SHEET AND WATER IMMERSION PREVENTION DEVICE

To provide a water cut-off sheet which can be easily assembled at a passage such as a building entrance in an emergency such as a heavy rain or a flood, and which exhibits an excellent water immersion prevention function without slipping or leaning even upon receipt of an impact from the inside of the building.SOLUTION: A water cut-off sheet 3, which is installed at an entrance/exit of a passageway 11 of a building, is configured such that: a plurality of vertical rib portions 3b are provided in a sheet main body 3a so as to project at regular intervals and are formed so as to be capable of being wound around sheet skin portions between the adjacent vertical rib portions 3b, 3b, and concurrently base end portions of connecting members 5, 5 are pivotally mounted on the opposite end portions so as to be rotatable in the vertical direction; in an emergency such as a heavy rain or a flood, both side end portions are stretched between both side support column members 1, 1 in the passageway 11; and the connecting members 5, 5 are connected to and supported by fixing means 4, 4 provided on both side walls of the passageway 11 to prevent the connecting members from slipping or leaning.SELECTED DRAWING: Figure 1 【課題】 大雨や洪水等の非常時には建物の出入口等の通路に簡単に組み立てることができ、建物内側から衝撃を受けてもズレたり傾倒したりすることなく、優れた浸水阻止機能を発揮する止水シートを提供する。【解決手段】 建物の通路11の出入口等に設置する止水シート３であって、シート本体3aに複数の縦リブ部3bを一定間隔毎に突設して、隣接する縦リブ部3b、3b間のシートスキン部を介して巻回可能に形成していると共に両側端部に接続部材５、５の基端部を上下方向に回動自在に枢着してあり、大雨や洪水等の非常時には展開して両側端部を通路11における両側支柱材１、１間に張設すると共に、上記接続部材５、５を通路11の両側壁面に設けた固定手段４、４に接続、支持させてズレや傾倒を防止するように構成している。【選択図】 図１