| 摘要 |
1. Drive for closing devices (1) which are in danger of falling down for a door or the like, including an electric drive motor (3) for opening and closing the door, wherein the drive motor (3) is securely connected to a closing device (1), and a toothed drive wheel (5) is provided, which is driven by this motor (3) and engages with a bar (6), which is disposed in a stationary manner and is toothed, for example, characterised in that a fall-preventing safety device is provided with a self-locking gear (8), driven by the drive motor (3), and an interrupter means which breaks the connection between the drive motor (3) and the self-locking gear (8) at high load, and in that a toothed wheel (9) is non-rotatably connected to the output shaft of the self-locking gear (8) and engages with the bar (6). |
