| 摘要 |
PURPOSE:To detect exactly an abnormal state of a product detecting switch, etc., by providing the product detecting switch on the previous stage and the self-stage, and outputting an abnormal state signal when the previous stage has a product non-existence signal and the self-stage has a product existence signal. CONSTITUTION:When a signal of product-existence from the previous stage is supplied, monitor rotary cam switches RS2, RS3 are turned on and a contact X1 becomes off, therefore, a product detecting switch LS2 of the second stage is checked in an area where a misgrip detecting rotary cam switch RS1 is turned on. Also, when a signal of product-non-existence is supplied from the previous stage, the contact X1 becomes on, therefore, check of the product detecting switch LS2 becomes ineffective. When check of the product detecting switch LS2 is executed, a relay RY1 is turned on and off in response to opening and closing of this switch LS2, and a stage abnormal state lamp PL is flickered. |
