| 摘要 |
To support a long spindle with a spindle nut thereon, a plurality of support elements are located in a housing (1), the support elements (26, 226) including spring-biassed sliders which, when positioned at predetermined stop recesses (48) in the inside of the housing (1) engage the stop recesses. Upon movement of the spindle against a support element (26, 226), the spring-biased sliders are pushed out of the recesses and the lifting movement of the sliders engages a projecting connecting dog (44, 53) in the groove of a take-up carrier rail, the groove being closed off at the end. As the spindle nut (5) moves, support elements (26) are pushed ahead of the leading face thereof, with respect to the movement of the spindle nut, and collected. Upon reversal of movement of the spindle (4), the end stop (51) of the take-up carrier rails pulls the support elements (26, 226) along until a support element snaps into a stop recess (48), thus releasing the connecting dog (44, 53) from the groove (50) in the rail, and permitting the end stop (51) of the carrier rail to pass over the connecting dog, thereby positioning the respective support element at the location of the stop recess. |
