| 摘要 |
In a lifting device, especially for single-column drawing machines, with a column (32), a lifting element (34) displaceably held by the column (32), a gas compression spring (36) for exerting an upwardly directed force on the lifting element (34) and a brake mechanism with brake shoes (60, 62), in which mechanism a downwardly directed moving force of the lifting element (34) can be transmitted to one of the brake shoes (60) in order to boost brake pressure, a brake release pedal (46) is provided for releasing the brake shoe (0, 62) and a shut-off device is provided for the actuating force of the brake release pedal (46), and by means of the shut-off device the transmission of the movement of the brake release pedal (46) to the brake mechanism can be interrupted if a certain brake pressure is exceeded, a permanently stable operation with little play of the shut-off device is ensured in that a safety device incorporating the shut-off device is provided and the safety device has a permanent magnet (98) and a magnetic disc (90) for magnetic attraction by means of the permanent magnet (98). A fatigue-free magnetic arrangement here replaces a fatigue-prone spring arrangement. <IMAGE>
|
