| 摘要 |
PURPOSE:To make the action of plural solenoids mounted on a front and rear sides smooth and quick by driving the rear solenoid in accordance with the detecting signal sent by a detecting means to detect a change in current passing through the front solenoid. CONSTITUTION:When an electric current 1 passes through a front solenoid 1, it flows in a current detecting resistance 19, and the voltage VB at the point B rises gradually, and the output terminal of a comparator 41 therefore changes from a high level voltage to a low level voltage. Designating a time elapsing until the output voltage of the comparator 41 reverses as t2, the front and rear solenoids 3 correctly begins stroke motion after time t2. Designating the movement of the movable iron cores of the front and rear solenoids 1, 3 as S1, S2 respectively,the above solenoids 3 are turned on or off corresponding to the on-off motion of the front solenoid 1 after t2 and t3 from its motion, its action is smooth, quick and accurate.
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