BLOCK DEVICE

PROBLEM TO BE SOLVED: To provide a block device capable of reducing tensile force acting on a hose connected to a bag.SOLUTION: A block device 2 include a hose capable of taking in fluid from one end, and a bag 22 connected to the other end of the hose and capable of expanding with pressure of fluid. The block device is configured to cause an introduction device 5 to introduce the bag 22 in a non-interrupted flow state into a fluid pipe 1 from a branch part 3a side branching from the fluid pipe 1, and then expand the bag 22 to block the inside of the fluid pipe 1. The block device also includes a protective member coupling between a connection member connecting between the hose and the bag 22, and a tip part of the introduction device 5.SELECTED DRAWING: Figure 2 【課題】バッグに接続されるホースに作用する引張力を低減することができる閉塞装置を提供する。【解決手段】一端から流体を送入可能なホースと、ホースの他端に接続され流体の圧力により膨張可能なバッグ２２と、を備え、導入装置５によりバッグ２２を流体管１から分岐する分岐部３ａ側から該流体管１の内部に不断流状態で導入し、バッグ２２を膨張させて流体管１の内部を閉塞する閉塞装置２であって、ホースとバッグ２２を接続する接続部材と、導入装置５の先端部とを連結する保護部材を備える。【選択図】図２