Rapid door for bay, has electric motor for driving shaft, in rotation, connected to flexible apron, and screw-locking device for stopping rotation of shaft when its rotating speed exceeds rotating speed of normal operation of door
摘要
<p>The door has an electric motor (5) for driving in rotation a shaft (4) connected to a flexible apron (6). The rotation of the shaft permits to raise or lower the apron to open or close the door with a rotating speed (Vn) of normal operation of the door. The shaft is connected to a screw-locking device (8) for stopping the rotation of the shaft when the rotating speed of the shaft exceeds the rotating speed (Vn).</p>
