| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a tower ascent prevention device which is small-sized relatively, reduces time and efforts for mounting and further improves tower ascent prevention effects. <P>SOLUTION: A tower ascent prevention device 1 comprises a main member 2 surrounding a main pole M, a fixing tool 3 fixed to the main pole M, a step connection member 4 which disposes a third divided piece 23 of the main member 2 without forming a step with respect to first and second divided pieces 21 and 22, and block rods 51, 52, 53, 54 and 55. The first and second divided pieces 21 and 22 are fixed through hinges 25 and 26 to adjuster plates 31 in both ends of a fixed part 3 which is fixed to the main pole M. On a surface of the adjuster plate 31 opposed to the surface where the hinges 25 and 26 are fixed, the step connection member 4 is fixed, and the third divided piece 23 is fixed to the step connection member 4. The third divided piece 23 is disposed at the same axial direction position as a nodal point of the main pole M to which an end portion of an upper tilting member C1 and an end portion of a lower tilting member C2 are fixed, so as to be positioned between the upper tilting member C1 and the lower tilting member C2. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
