| 摘要 |
The support has a base plate in which a rod is secured in a vertical position. A holder device can be moved up and down on the rod. An energy storage means in the form of a spring means, which is disposed beside the rod, is connected to a cable drum. A cable leads from the cable drum to the holder device by way of direction-changing rollers. Thus, force from the energy storage means is available for the upward movement of the holder device. The spring means in the energy storage means is put under tension again when the holder device is moved downwardly. The energy storage means has an adjusting means for prestressing the spring means. The energy storage means, being disposed outside the rod, makes it possible in a very simple manner to intervene in the force potential of the energy storage means with an additional drive means. |
