| 摘要 |
PURPOSE: To enhance the utilization rate of space and facilitate the assembling and disasembling works by constituting the support framework of keels connected in series by steel wire ropes, a hand winch fixed to one end of the support framework and connected to the end of the rope, and a reversing shaft of the rope fixed to the other end of the support framework. CONSTITUTION: A hand winch 20 and a reversing shaft 21 of a steel wire rope are fitted to each end of a support framework 18. Then, one end of the steel wire rope 19 is fixed to the winch 20. The other end of the wire rope is forced to penetrate into small holes located at the same side of respective keels 10 and turn back around the reversing shaft and further, penetrate into small holes located at the other side of the keels 10 and fixed to the winch 20. The winch 20 is wound to strongly and simultaneously pull two steel wire ropes 19 in a closed state and strongly press mutually the external end faces of the all keels 10 in order to form the arched support framework 18. |
