| 摘要 |
<P>PROBLEM TO BE SOLVED: To lay down a rail track part for elevating in an existing support tower. <P>SOLUTION: In the height possible to lay down from the ground, the first step of the rail track part formed body for elevating is mounted to the inner periphery surface of the existing tower, an elevating part is mounted to the first step of the rail track part formed body, the elevating part is enabled to elevate along the rail track part formed body and the second step or a plurality of rail track part formed bodies after the second step are installed to the elevating part. The elevating part is made to move to the upper position of the first step of the rail track part formed body and the work of mounting the second step of the rail track formed body to the inner periphery surface of the existing tower continuously to the first step of the rail track part formed body is repeatedly performed by required number of times. <P>COPYRIGHT: (C)2004,JPO |
