| 摘要 |
A hidden lifting chain assembly in a lift truck multistage telescopic mast comprises a lifting chain (60) positioned in an elongate enclosure formed between two juxtaposed flanged uprights (14, 20) of adjacent telescopic mast sections. The chain (60) is connected to one upright (14) by a chain anchor (68) and extends longitudinally through the enclosure to a sheave (66) mounted on the other upright (20) The anchor (68) lies within the enclosure adjacent one end from which an anchor detachment bolt (68a) is accessible after removing a guide roller (14a) detachably secured by bolts (69) accessible externally. Thereby, despite the hidden location of the anchor (68) the chain (60) can be readily detached and removed for servicing or replacement while the mast is fully retracted without requiring disassembly of the mast sections. An anchor supporting block (67) provides a stop preventing hyperextension of the mast sections and is also detachably secured by bolts (67a) accessible externally so as to permit removal and replacement at the same time as the anchor (68).
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