Patent ID: 6820736
Filing Date: 2004-11-23
Classification: B65G

Abstract:
A conveying apparatus comprising:a plurality of rollers for conveying an article, a motor for driving at least one of the rollers in rotation, and a controller for controlling operation of the motor, the controller comprising a rotation detector for obtaining actual information with respect to a rotating state of the at least one roller, which rotating state is at least one of a) rotational velocity, b) rotational direction, c) rotational acceleration, d) rotational deceleration, e) rotational distance, and f) rotational direction, for the at least one roller with a voltage applied to the motor, and the controller further comprising an article-state detector such that the actual information for the at least one roller will be compared with standard information representing a reference rotating state of the at least one roller expected when a voltage is applied to the motor, wherein on the basis of a difference found between the actual information and the standard information at least one of a) the presence or absence, b) weight, and c) normality or abnormality in motion of an article on the at least one roller will be determined.