| 摘要 |
<p>The shutter (1), designed to cover a wall opening (3) and move relative to guide tracks fixed to angle brackets (15) at the sides, has transmission members between the guide tracks and the shutter edges which separate at least partially from the shutter in the event of a lateral force above a set level being applied to the shutter. The transmission members are connected to the shutter by clamps that apply an elastic pressure to the shutter or to projecting edges, and are connected to the shutter drive system which moves them along the lateral guide tracks.</p> |
