| 摘要 |
PURPOSE:To enable independent control by each stage for the dangerous condition of press operations by actuating an emergency security means when the output signal for braking action is not generated while danger is announced and when the dangerous condition is further announced. CONSTITUTION:The output of amplifiers 51, 52 decrease; the output C of an AND gate 61 decreases; and a slide stops, when a hand advances to above a bolster. The output of a tachogenerator 3 decrease; the output of a current rectifier circuit 4 attains a level V; the output (f) of a window comparator 5 is generated to generate the output in an OR gate 62 and an AND gate 65; and the emergency security means 72 does not operate. The output of the amplifier 52 decreases to zero as well, when the hand advances further above the bolster and advances into the 2nd dangerous region; however, the security means 72 does not operate as far as the output of the tachometer is zero. The extremely dangerous condition is indicated if the hand is in the 2nd dangerous region and when the output is generated in the tachogenerator 3 and the output of the window comparator is not generated. The output (g) of an OR circuit 63 is then not generated and the emergency security means 72 operates. |
