| 摘要 |
Safety unlocking device for up-and-over door leaves, such as an articulated ceiling door, heavy rolling door or the like, with a drive unit, especially with a gear step-up and electromotor, if appropriate with a load-compensating device formed especially by torsion springs, and a device for separating the connection between the door leaf and the drive unit, which safety unlocking device, for the purpose of preventing the door leaf from possibly crashing down, has a sensing device (10) for the position of the door leaf, which releases an unlocking member (9) for actuating the separating device only when the door leaf is in the closed position. <IMAGE> |
