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

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).