초록 ▼

The present invention relates to a fail-safe automatic sliding operation control apparatus for a press. The entrance and withdrawal behaviors of an operator's hand relative to danger zones (D, D.sub.N) on a bolster of the press are detected by an output generation configuration of two optical curtai

The present invention relates to a fail-safe automatic sliding operation control apparatus for a press. The entrance and withdrawal behaviors of an operator's hand relative to danger zones (D, D.sub.N) on a bolster of the press are detected by an output generation configuration of two optical curtains. A signal for permitting a lowering operation of the slide is generated when the operator's hand is withdrawn from the danger zones (D, D.sub.N).

대표청구항 ▼

[ We claim:] [1.] A fail-safe automatic sliding operation control apparatus for a press in which a work located on a bolster is processed by downwardly moving a slide to the work, comprising:first detecting means for detecting entry of a human body within a first danger zone which is established to

[ We claim:] [1.] A fail-safe automatic sliding operation control apparatus for a press in which a work located on a bolster is processed by downwardly moving a slide to the work, comprising:first detecting means for detecting entry of a human body within a first danger zone which is established to include the bolster;second detecting means for detecting entry of the human body within a second danger zone which is established outside of said first danger zone to include said first danger zone;withdrawal detection means for generating a human-body-withdrawal-detection-signal indicative of withdrawal of the human body from said first and second danger zones, when a first human-body-absence-detection-signal is generated by said first detecting means and thereafter a second human-body-absence-detection-signal is generated by said second detecting means; andactuation control means for generating an automatic actuation signal for the slide when said human-body-withdrawal-detection-signal is generated by said withdrawal detection means.