ARTICLE CARRYING MONITOR

摘要

Disclosed is an article carrying monitor (100) for precisely detecting the six faces of an article to be inspected, thereby to detect the presence or absence of contamination satisfactorily.  A monitor unit detects, for the front face of the article, the presence or absence of the contamination by means of a front-face detector, if the distance from the front face of the article to the front-face detector is within a predetermined range.  If the distance from the front face of the article to the front-face detector exceeds the predetermined range and if a contaminated portion is on the front-face lefthand, the presence or absence of the contamination is detected by an upper-face front-side leftward detector and a lower-face front-side leftward detector.  If the distance from the front face of the article to the front-face detector exceeds the predetermined range and if a contaminated portion is on the front-face righthand, the presence or absence of the contamination is detected by an upper-face front-side rightward detector and a lower-face front-side rightward detector.  The contamination of the back face, the left face and the right face is likewise measured by the article carrying monitor (100).