| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power wrench for an FRP tube capable of solving a problem of a conventional pipe wrench for a steel tube that, when the wrench is used for a soft FRP tube, a contact section is damaged, and the control of power for fastening the FRP tube which requires small torque is difficult. Ž<P>SOLUTION: In this power wrench for FRP tube, an endless friction rubber belt is used to prevent the surface of the soft FRT tube from being damaged, and a required fastening force is obtained by driving, by irregular rollers, the irregular surface of the timing belt formed in a held structure comprising three rollers and having irregularities. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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