| 摘要 |
PROBLEM TO BE SOLVED: To provide a safe fixed axial force bolt device easily assembled and capable of preventing component parts from being loosened and falling in those construction works at a high place such as the installation of a tower for overhead transmission line and auxiliary parts in the fixed axial force bolt device capable of easily providing a specified tightening axial force. SOLUTION: A screw part M threaded with an applicable bolt 4 is formed at the bottom part of a housing 1. A plurality of disc springs 3 and washers 2 are installed on the bolt 4 and the bolt 4 is lockingly threaded to the housing 1. A thin neck part is formed on the bolt at a prescribed position so that the threading of the bolt can be released after the bolt is tightened with a proper axial force. Accordingly, the component parts are not loosened. Also, since the compressed amounts of the disc springs are preferentially specified, a fixed tightening axial force can always be provided without being affected by the torque factor of the bolt. In addition, attraction washers formed of a permanent magnet are interposed in the bolt device, and a rubber-like elastic body is stored in the housing of light-shielding watertight structure. COPYRIGHT: (C)2006,JPO&NCIPI
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