| 摘要 |
PURPOSE:To reduce a shock given to a member to be driven with a simple and inexpensive constitution, by supplying a working current which is smaller than the rated working current to an electromagnetic clutch, and subsequently, supplying the rated working current after a prescribed delay time has elapsed. CONSTITUTION:A transistor Tr1 conducts by a forward turn electromagnetic clutch operation signal from a main control device 18, an initial working means 20 supplies a working current which is smaller than its rated working current, to an electromagnetic clutch 6 for, forward turn by which said clutch 6 is made a half-connected state, and simultaneously, a control current is supplied to a time constant circuit of a time counting means 22. Subsequently, when a Tr5 is induced to a conducting state after a prescribed delay time has elapsed, the control current is supplied to the base of a Tr6 of a main working means 24 through a resistance R11. Subsequently, a Tr7 conducts, the rated working current flows through said clutch 6 and the Tr7 from an electric power supply DC for the electromagnetic clutch, the clutch 6 is made into a complete connected state, and a member to be driven 2 is moved by the normal degree of a driving source 4. |
