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Recovery device for mistaken operation of reeling door

  • US 20040113574A1
  • Filed: 12/12/2002
  • Published: 06/17/2004
  • Est. Priority Date: 12/12/2002
  • Status: Abandoned Application
First Claim
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1. 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 energizing condition of said motor (11);

    a limit switch device (20), which includes a threaded rod (210) moving in pace with the door-reeling machine (10), and 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 detects 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 (E1) further including a feedback circuit (E1a), in which when said sensing device detects this abnormal status then cuts off the power supply, the rotor of said motor (11) rotates reversely by uprising torque, and a counter-potential is generated which is then feedback to the coil winding (120a) of said brake device (12) to delay the braking, so that said iron reeling door slides downward to recover.

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