| 摘要 |
<p>The carriage 9 comprises a body 10 and two pairs of support devices 13, each comprising a support member 14 mounted on a small carriage 16, 17 displaceable on a transverse guide 18 on the body 10. The support devices 13 run, with running wheels 15, on running tracks 6 or 7 of the sections 1 or 2. The lateral displacement of the support devices 13 when they move from one section 1 or 2 to the other is controlled by guide wheels 26 interacting with guide tracks 28 or 29 on the lateral sides of the sections 1 and 2. An auxiliary wheel 31, mounted on the body 10 of the carriage 9, corresponds to each support device 13. The auxiliary wheels 31 interact with auxiliary tracks 32 mounted on the tip-side end of the mast-side section 1 in order to lift the body 10 and the corresponding support devices 13 during the entire lateral displacement of the latter. <IMAGE></p> |
