| 摘要 |
<p>The device has a drum (8) turning around a rotational axle (11) of the drum, where a shutter is wound around the drum in an opening position by forming a roller constituted of turns formed by successive layers of the shutter. The shutter is unwound toward a closing position. A support unit supports the drum with respect to walls of a bay (6), and a contact plate (16) exerts a radial thrust (Fp) with respect to the drum on the roller. A drum suspension unit of the support unit has a suspension axle (13) parallel to the rotation axle, where the drum oscillates around the suspension axle.</p> |
