| 摘要 |
<P>PROBLEM TO BE SOLVED: To accurately measure an actual fastening force applied to a screw even if fastening work is carried out for the screw while a torque wrench is tilted. <P>SOLUTION: The torque wrench 20 includes a fastening head 21 at the tip of a shaft 22. The fastening head 21 includes an engaging part 24 engaged with a nut 12. In the engaging part 24, three distance sensors 25 are arranged in a circular arc part 24b in the direction of an axis A of the nut 12 in order to detect the tilting of the torque wrench 20 with respect to the axis A. The tilting of the torque wrench 20 is detected from a difference between the detected distances using a tilting angle detection part 27, thereby detecting actual torque to the nut 12. A preset prescribed torque value is corrected by a torque correction circuit 30, and a corrected prescribed torque value is calculated. <P>COPYRIGHT: (C)2013,JPO&INPIT |
