| 摘要 |
<p>PURPOSE:To provide a lift support system of a simple structure at low cost, capable of causing vertical movements by large strokes. CONSTITUTION:A lift support system comprises a first frame 10, a second frame 20 so installed as to overhang the first frame 10, and a third frame 30 so installed as to overhang the second frame 20. Rotatable sprockets 13, 14, and 15 are axially held by the first frame 10 and rotatable sprockets 23 and 24 are axially held by the second frame 20. Respective sprockets are interlocked with each other by a circulating chain 16 so as to be rotated in turn. The third frame 30 is joined with the circulating chain 16 by means of a joining member 32. When the sprocket 14 is driven for rotation by a drive motor 40, the circulating chain is driven, lifting first the third frame 30, and then the second frame 20, followed by the third frame 30.</p> |
