DETECTION MECHANISM OF TEETH BREAKING OF TIMING BELT WITH TEETH, METHOD FOR DETECTING BREAKING OF TOOTH AND SORTER

摘要

PURPOSE: To surely detect tooth breaking of a timing belt with teeth by providing a clock signal output means or the like for outputting a pulse-like clock signal every specified rotating amount of a drive motor shaft. CONSTITUTION: A clock signal output means for outputting a pulse-like clock signal to a controller 156 every specified rotating amount of a shaft 140a of a drive motor 140 is constituted by an encoder clock disk 152 and an encoder clock sensor 154. A position sensor 162 outputs a position signal whenever position slits 160A, 160B, 160C and 160D of a position detection disk 160 pass. In other words, a position signal output means for outputting a position signal every specified running amount of a timing belt with teeth 150 is constituted of the disk 160 and a sensor 162. The number of pulses of the counted clock signal is compared with a design value and it is judged that tooth breaking exists if a difference therebetween is out of a specified range.