Industrial buildings opening e.g. access doorway, closing barrier, has flexible structure filled with water by filling device, and flexible device connected to mechanical system for lowering and lifting structure

摘要

The barrier has a flexible structure (1) filled with water by a filling device (2). The structure has a free end connected to a positioning device (3). A supporting apparatus (5) connects the free end with the ground. The positioning device has a cable tightened between the ends of a building corresponding to two end positions of the structure. A flexible device is connected to a mechanical system for lowering and lifting the structure.