| 摘要 |
A hidden chain assembly adaptable for use in multi-stage telescopic masts for lift trucks. A lifting chain is positioned transversely between two juxtaposed elongate upright members within an elongate enclosure defined by transversely-extending longitudinal flanges of the upright members. The chain is connected to one of the upright members by an anchor located within the enclosure adjacent to one end of the upright member, and extends from the anchor through the enclosure longitudinally toward the opposite end of the upright member where it is trained about a sheave rotatably attached to the other upright member. The anchor includes a detachment structure which is operatively accessible while the anchor is within the enclosure for permitting detachment of the chain from the first upright member despite the hidden location of the anchor within the enclosure. This permits removal, for servicing or replacement, of the chain while the mast is in a fully-retracted position without requiring disassembly of the mast sections from each other. A detachable mast guide roller, and detachable interference stop for preventing hyperextension of the mast sections with respect to each other, are associated with the detachable chain anchor.
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