| 摘要 |
<p>The present invention relates briefly to an arrangement for hoisting devices to keep a cable (10) substantially vertically stretched between a derrick or similar and a hoisting device, e.g. a derrick bridle (1), so that the cable will not be able to be depositioned by gusts and other factors. The arrangement consists of a set of brackets (12) stretched between and glidably fixed to two opposed hoisting cords (2a, 4a), the brackets (12) being equipped with a ring (13) approximately at their centre, through which ring the cable (10) is running with an increasing inner diameter for each ring (13) from the top downwards. To the cable (10) are fastened a set of elements (14) spaced apart with increasing diameter for each element from the top downwards for each inner diameter of the rings (13) so that each element (14) one by one is restricted to pass a corresponding ring (13) and thereby each is hoisting one by one a bracket (12) holding the cable (10).</p> |
