| 摘要 |
PURPOSE:To perform stable detection and to easily detect the abnormal arrange ment of an object to be detected by detecting the position of a detection rod whose tip abuts on the object to be detected by a photosensor. CONSTITUTION:A light receiving element 18b receives light and turns off in the normal state, and a light receiving element 19b does not receive light and turns on because light from a light emitting element 19a is cut off by the detection rod 17. When a resin tablet 2 is not stored in a buffer 21, the detection rod 17 moves down below its normal position and both photosensors 18 and 19 turn off. Further, when the resin table 2 is inserted while caught in the middle of the buffer 21, the detection rod 17 whose tip abuts on the resin tablet 2 is above the normal position and either of the light receiving elements 18a and 19a does not receive light and the photosensors 18 and 19 turn on. Therefore, whether or not the resin tablet 2 is pressed and its abnormal arrangement are detected with the outputs of the photosensors 18 and 19. |
