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

• Current Assignee: Chung Hsien Hsieh
• Original Assignee: Chung Hsien Hsieh
• Inventors: Hsieh, Chung Hsien
• Application Number:
  US10/317,488
• Publication Number:
  US 20040113574A1
• Time in Patent Office: Days
• US Class Current: 318/275
• CPC Class Codes: E06B 9/68 Operating devices or mechanisms, e.g. with electric drive
• CPC Class Codes: H01H 19/186 with travelling nuts
• CPC Class Codes: H02K 11/00 Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection casings, enclosures or supports H02K5/00
• CPC Class Codes: H02K 7/1163 where at least two gears have non-parallel axes without having orbital motion

Abstract

A recovery device for mistaken operation of a reeling door, wherein the door-reeling machine includes a motor, a brake for braking a rotary shaft which actuates the brake disc to release the brake upon motor energization. A limit switch device includes a threaded rod moving in pace with the door-reeling machine, a pair of sliding blocks on the threaded rod for actuation of limit switches at both ends thereof to control upper and lower stagnation points of the door. A sensor for detecting door reeling and cutting off power when an abnormal reeling condition is detected. A circuit for controlling motor start and stop and controlling the brake includes a feedback device. When the sensor detects an abnormal condition and cuts off power, the motor rotor reversely rotates due to uprising torque generating a counter-potential which is fed back to a coil winding of the brake to delay braking action so that the door slides downward to recover.

Claims

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.

3. A recovery device for mistaken operation of reeling door in accordance with claim 1, wherein said sensor device (30) includes a metal blade (301) attached at another end of the threaded rod (210) of the limit switch device (20) to follow the motion therefrom.

4. A recovery device for mistaken operation of reeling door in accordance with claim 3, wherein said sensor device (30) includes a magnetic-sensing element (302) provided at the front of rotary section of said metal blade (301).

5. A recovery device for mistaken operation of reeling door in accordance with claim 1, wherein the coil winding of said brake device (12) is the coil winding (120a) of a electromagnet (120).

2. 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.

6. A recovery device for mistaken operation of reeling door in accordance with claim 2, wherein said circuit (E1) further includes a branch circuit (E2) connected with a capacitor (C), in which when said sensing device detects an abnormal status and 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 (Vs) to said coil winding (120a) of the electromagnet (120) of the brake device (12) to delay braking action, so as to make said reeling door slide downward to recover to its original position due to uprising torque.

7. A recovery device for mistaken operation of reeling door in accordance with claim 2, wherein said sensor device (30) includes a metal blade (301) attached at another end of the threaded rod (210) of the limit switch device (20) to follow the motion therefrom.

8. A recovery device for mistaken operation of reeling door in accordance with claim 7, wherein said sensor device (30) includes a magnetic-sensing element (302) provided at the front of rotary section of said metal blade (301).

9. A recovery device for mistaken operation of reeling door in accordance with claim 2, wherein the coil winding of said brake device (12) is the coil winding (120a) of an electromagnet (120).