| 摘要 |
PURPOSE:To regulate accurately and rapidly a pass line by means of a simple construction, by detecting electrically the positions of a stepped shape rocker sheet and a wedge respectively, and positioning them automatically to proper positions respectively. CONSTITUTION:The position of a stepped shape rocker sheet 12 is detected by a rack 21 and a pinion 22 to transmit it to a detecting device 17 through sprocket wheels 27, 28. An electric signal H detected by the device 17 is compared with a set value (h) to amplify the obtained deviation DELTAh by a power amplifier 26 thereby exciting a solenoid operated changeover valve 25 to (a) or (b). And a pressurized oil is supplied to a hydraulic cylinder 16 through a pilot check valve 24 and a variable flow regulating valve 23, to move the sheet 12. When the deviation is constringed to zero; the valve 25 returns to a neutral point, the supply of the oil is stopped, and the oil in the cylinder 16 is sealed in it by the valve 24 to fix the position of the sheet 16. Next, a positioning of the wedge 11 is performed in the same manner. |
