| 摘要 |
<p>PURPOSE:To reduce the extent of dangerousness at the time of disconnection in power wiring, by inserting a fail-safe relay, having a normally opened contact, into the point midway in a power supply line to a DC motor and an electromagnetic clutch. CONSTITUTION:In case of disconnection or the like in power wiring, a fail-safe relay 91 is deenergized, and the normally opened contact 901b is opened, while feed to an electromagnetic clutch 16 and a DC motor 13 is cut off, and each operation of the DC motor and the electromagnetic clutch is stopped. Therefore, manual steering is kept intact so that there is a little in dangerousness.</p> |
