| 摘要 |
<p>The first of the circulating guides is displaceable in the bearer (1) longitudinal direction. At least one linear actuator (29,31) is anchored with a first end to the bearer and with a second end is coupled to the first circulating guide. Between the first and second circulating guides (19,21,23,25) is a third such guide. A pulley unit is anchored with one end between the first and the second circulating guides to the bearer. The pulley unit is guided over the first and second circulating guides and extends into the two end components supporting the hooks.</p> |
