Recovery device for mistaken operation of reeling door

A recovery device for mistaken operation of reeling door, characterized in that it comprises:

• a door-reeling machine (10), which includes a motor (11) for driving a reel of the reeling door;
• a brake device (12), which is provided at the inside of the door-reeling machine (12) for the braking of a rotary shaft (110), and which can actuate the brake disc (121) to release the brake by a coil winding (120a) under the condition where said motor (11) is supplied with power supply;
• a limit switch device (20), which includes a threaded rod (210) moving in pace with the door-reeling machine (10), a pair of sliding blocks (212a,212b) that are provided on said threaded rod (210) for the actuation of the limit switches (213a,213b) respectively at both ends of said threaded rod (210) so as to control the upper and lower dead points of the reeling door;
• a sensor device (30) which can detect reeling status of said door-reeling machine (10), the power supply supplied to said door-reeling machine (10) being cut off when abnormal reeling condition of said reeling door is detected;
• a circuit (E1), which is provided for controlling start and stop of the motor (11) of the door-reeling machine (10), and for controlling braking and releasing of the brake device (12);
• said circuit (El) further including a branch circuit (E2) connected with a capacitor (C), in which when said sensing device detects this abnormal status and then cuts off the power supply, said capacitor (C) discharges to a coil winding of a relay (RY) so as to maintain said branch circuit temporarily supplying a reverse current, to make the motor (11) rotate in reverse direction, so that the reeling door slides downward to recover to its original position.