| 摘要 |
<p>PURPOSE:To enable wire extension to be smoothly performed, by suspending wire bearing devices from struts in a section for extending wires, and by permitting an extension wire rope to pass the respective wire bearing devices. CONSTITUTION:When cables 55 are extended between struts 46, then wire bearing devices 47 are suspended from the struts 46 first, and from one end of the struts 46 to the other end of the struts 46, in order, through the respective wire bearing devices 47, an extension wire rope 49 is passed. After that, at the one end of an extension wire section, to the rear end of the extension wire rope 49, a master wire 50 is connected and is stretched from the other end of the extension wire rope 49 by a winch unit 51. Then, from a drum 52 at one end, the master wire 50 is payed out. At every fixed interval of the master wire 50 which is payed out, cable carriers 53 are fixed, and the cables 55 extended to the cable carriers 53 are supported. At every fixed interval of the master wire 50 which is payed out from one end in this manner, the cables 55 are supported by the cable carriers 53 and are payed out from a drum 56.</p> |
