CPC G01D 5/14 (2013.01) [B25B 21/02 (2013.01)] | 20 Claims |
1. A tightening machine that rotates a socket portion fitted to a bolt or a nut to fasten or loosen the bolt or the nut, the tightening machine comprising:
a mobile receiving portion that receives a positioning signal from positioning means;
a geomagnetic sensor that detects a direction of the socket portion with the mobile receiving portion as a starting point; and
a control portion that receives a positioning signal received by the mobile receiving portion and a positioning signal received by a fixed receiving portion at a fixed position away from the tightening machine, corrects a three-dimensional position of the mobile receiving portion based on the positioning signals, and calculates a three-dimensional socket position of the socket portion of the tightening machine based on a result of the correction and the direction of the socket portion detected by the geomagnetic sensor.
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