| 摘要 |
A vertical chain-driven conveyor apparatus includes two upright side frames, two sets of upper and lower sprockets mounted revolvably and respectively on the side frames, and a pair of endless chains, each trained on a respective set of the upper and lower sprockets for elevating and lowering a plurality of merchandise rolls. Each chain is guided by a guide rail unit to smoothly travel along an upright running route. A pair of chain-tension adjusting units are respectively coupled with the upper sprockets such that the upper sprockets can be moved upwardly relative to the lower sprockets to properly tense the chains.
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