| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hoisting accessory for a crane to easily perform slinging work without an unbalanced load to a suspended load. <P>SOLUTION: The hoisting accessory has a conical hoisting accessory body 10, a plurality of fixed pulleys 20, 20... which are attached around the bottom surface of the conical hoisting accessory body 10, a plurality of movable pulleys 30, 30... and an adjustment cord 40 which is wound alternatively to the fixed pulleys 20, 20... and the movable pulleys 30, 30..., and the plurality of fixed pulleys 20, 20... are arranged in a torus form. Each of the movable pulleys 30 is stopped in a load-balanced position, so that a suspended load L that is suspended from each of the fixed pulleys 20 is not applied with an unbalanced load. In addition, the horizontal direction component of a load applied to each of the fixed pulleys 20 is distributed in a circumferential direction and stress concentration does not occur, so that strain and damage are not likely to occur in the conical hoisting accessory body 10. <P>COPYRIGHT: (C)2012,JPO&INPIT |
