| 摘要 |
<p>A winch mechanism includes first, second and third rolls (3, 5, 7) for receiving therearound a webbing, cable, rope or the like (11). The first and second rolls (3 and 5) are rotatable about the axes thereof and the third roll (7) is rotatable about the axis thereof and is also moveable towards and away from a line joining the axes of the first and second rolls at a point along the line intermediate the first and second rolls. The webbing, cable, rope or the like extends around that part of the periphery of the first roll (3) on that side thereof remote from the third roll (7), then passes between the first roll and the third roll, then extends around that part of the periphery of the third roll (7) remote from the line joining the axes of the first and second rolls (3 and 5), then passes between the second roll (5) and the third roll (7), and finally extends around that part of the periphery of the second roll on that side thereof remote from the third roll. The first, second and third rolls (3, 5, 7) and the webbing, cable, rope or the like (11) are dimensioned such that the distance between the first and second rolls (3 and 5) is less than the diameter of the third roll (7) with the webbing, cable, rope or the like (11) extending therearound. <MATH></p> |
