US 11,655,126 B2
Diagnostic system
Masaaki Hirai, Tokyo (JP); Tadashi Shudo, Tokyo (JP); Motoki Yoshida, Himeji Hyogo (JP); and Yoshinobu Ishikawa, Tokyo (JP)
Assigned to TOSHIBA ELEVATOR KABUSHIKI KAISHA, Kawasaki (JP)
Filed by TOSHIBA ELEVATOR KABUSHIKI KAISHA, Kawasaki (JP)
Filed on Nov. 17, 2021, as Appl. No. 17/528,349.
Claims priority of application No. JP2020-192562 (JP), filed on Nov. 19, 2020.
Prior Publication US 2022/0153555 A1, May 19, 2022
Int. Cl. B66B 27/00 (2006.01); G01D 5/34 (2006.01); B65G 23/44 (2006.01)
CPC B66B 27/00 (2013.01) [B65G 23/44 (2013.01); G01D 5/34 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A diagnostic system comprising:
a conveyor device including an endless chain having a plurality of rollers coupled at regular pitches and each fit into a bush, to circularly move between a first sprocket and a second sprocket;
first and second sensors diagonally disposed apart from each other on a moving path of the chain, irrespective of an operating direction of the conveyor device, to detect a passage of each of the rollers of the chain; and
a diagnostic device configured to measure an amount of elongation of the chain based on a first detection signal output from the first sensor and a second detection signal output from the second sensor according to movement of the chain during operation of the conveyor device,
wherein:
the first sensor is disposed close to the first sprocket on one side of the moving path of the chain,
the second sensor is disposed close to the second sprocket on another side of the moving path of the chain, and
the diagnostic device is configured to
according to the operating direction of the conveyor device, when the first sensor is disposed in the loosened side, measure the amount of elongation of the chain in a section from the first sensor to the first sprocket, a section in which the chain is engaged with the first sprocket and a section from the first sprocket to the second sensor, and
according to the operation direction of the conveyor device, when the first sensor is disposed in the tightened side, measure the amount of elongation of the chain in a section from the first sensor to the second sprocket, a section in which the chain is engaged with the second sprocket and a section from the second sprocket to the second sensor.