Power-operated door used as a garage door comprises a drive arrangement having a motor and a traction gearing having a traction device which is tensioned relative to the door leaf in the opening direction

摘要

Power-operated door (10) comprises a drive arrangement (32) having a motor (38) and a traction gearing (40) having a traction device (44) which is tensioned relative to the door leaf (14) in the opening direction and relative to the motor in the closing direction when the door leaf is moved. An independent claim is also included for a drive arrangement used in the above power-operated door. Preferred Features: The traction device interacts directly o the door leaf to lift the door. A closing force presses the door leaf in the closing direction over the whole moving region of the door leaf and thus tensioning the traction device.