| 摘要 |
<p>For a failsafe and fault-secure yet simply and economically constructed lifting device, two block and tackle groups each having two block and tackle units (20, 21 and 22, 23) are provided in the lifting device (1), wherein each block and tackle group is driven by a common drive unit (16) and the block and tackle units (20, 21 and 22, 23) of a block and tackle group act on the lifting carriage (6) on two opposite faces and at diagonally opposite points and one pulling means (10b, 11b) of each block and tackle group is guided to the opposite face of the lifting carriage (6) under the lifting carriage (6).</p> |
