公开(公告)号：US11273992B2

公开(公告)日：2022-03-15

申请号：US17155742

申请日：2021-01-22

Applicant: DAIFUKU CO., LTD.

Inventor： Yuichi Ueda ,  Osamu Matsui ,  Hiroyuki Koide ,  Atsushi Ishikura

IPC: B65G43/08 ,  B65G23/22 ,  B65G47/50

Abstract: A supervisory controller determines the control status of a conveyor belt by a control unit. When it is determined that the control status of the conveyor belt is abnormal, the supervisory controller prohibits loading an article onto a traveling carriage and instructs the control unit to reset the control unit. When it is determined again that the control status of the conveyor belt by the control unit subjected to the reset instruction is abnormal, the supervisory controller prohibits loading an article onto the traveling carriage and acquires an abnormality record from the control unit. When it is determined that the control status of the conveyor belt by the control unit subjected to the reset instruction is normal, the supervisory controller acquires the abnormality record from the control unit.