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1. (WO1994029558) GARAGE-DOOR DRIVE WITH SAFETY CUTOFF

Pub. No.:    WO/1994/029558    International Application No.:    PCT/EP1994/001871
Publication Date: Dec 22, 1994 International Filing Date: Jun 8, 1994
IPC: E05F 15/00
H02H 7/08
H02H 7/085
Applicants: TOROTRON ELEKTRONIK GMBH
ANKELE, Thomas
Inventors: ANKELE, Thomas
Title: GARAGE-DOOR DRIVE WITH SAFETY CUTOFF
Abstract:
To secure a garage-door drive unit (10) that has a garage-door operating mechanism equipped with a drive motor (22) and has a control system for the drive motor (22) with a door-function control unit and with a motor starter unit (58) driven by the door-function control unit via motor control signals (AUF, AB) to prevent damage to goods or injury to persons as a result of a movement of the driven garage door (20), the invention proposes that the garage-door drive unit (10) be equipped with a counterforce monitoring sensor (64) which generates a counterforce signal when a counterforce appears when the drive motor is running, that the control system has a safety cutoff (60) which detects the counterforce signal and that following a start-up phase of the garage-door drive unit (10) the safety cutoff checks whether the counterforce signal appears and if it does, triggers an emergency stop using a stop signal (55).