US 12,000,713 B2
Tightening machine
Yusuke Horiba, Aichi (JP)
Assigned to SANYO MACHINE WORKS, LTD., Aichi (JP)
Appl. No. 17/607,928
Filed by SANYO MACHINE WORKS, LTD., Aichi (JP)
PCT Filed May 14, 2021, PCT No. PCT/JP2021/018410
§ 371(c)(1), (2) Date Nov. 1, 2021,
PCT Pub. No. WO2022/239229, PCT Pub. Date Nov. 17, 2022.
Prior Publication US 2023/0191571 A1, Jun. 22, 2023
Int. Cl. G01D 5/14 (2006.01); B25B 21/02 (2006.01)
CPC G01D 5/14 (2013.01) [B25B 21/02 (2013.01)] 20 Claims
OG exemplary drawing
 
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.