US 11,669,067 B2
Work management apparatus, work management method, and work management system
Yuto Kawauchi, Osaka (JP); Yuya Suzuki, Osaka (JP); Ryutaro Tanno, Osaka (JP); Akihiro Harada, Osaka (JP); and Tsutomu Shinohara, Osaka (JP)
Assigned to FUJIKIN INCORPORATED, Osaka (JP)
Appl. No. 17/311,852
Filed by FUJIKIN INCORPORATED, Osaka (JP)
PCT Filed Nov. 25, 2019, PCT No. PCT/JP2019/045937
§ 371(c)(1), (2) Date Jun. 8, 2021,
PCT Pub. No. WO2020/121790, PCT Pub. Date Jun. 18, 2020.
Claims priority of application No. JP2018-234455 (JP), filed on Dec. 14, 2018.
Prior Publication US 2022/0019187 A1, Jan. 20, 2022
Int. Cl. G05B 19/401 (2006.01)
CPC G05B 19/401 (2013.01) [G05B 2219/39188 (2013.01); G05B 2219/49056 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A work management system for managing tightening work for tightening each of a plurality of fastening parts included in a product,
the work management system comprising: a tool comprising a torque sensor capable of detecting a tightening torque for tightening the fastening parts acting on a bit, and first and second markers for image processing; and
first and second cameras for capturing images of the product from different observation points,
wherein the torque sensor starts measurement of the tightening torque when a detected tightening torque exceeds a set threshold, ends the measurement of the tightening torque when the measurement data satisfies a predetermined condition, and outputs torque-related data including a measurement time based on the measurement data between start of the measurement start and end of the measurement,
an image processing unit that calculates coordinates of the engagement position of the bit that engages with the fastening part from a plurality of image data of the tool corresponding to the measurement time included in the torque-related data and including the image of the first and second markers captured by the first and second cameras during the tightening work of the fastening part; and
a marker mounting device provided with the first and second markers and removably mounted to the bit.