| 摘要 |
<p>PURPOSE:To facilitate to confirm a speed-changing range and prevent a mis- operation, by providing an automatic resetting type running direction indicating switch, a controller for generating an output signal in accordance with an input signal, an actuator for selectively achieving one of operating conditions and an indication panel for indicating the operating conditions. CONSTITUTION:Only when the running direction indicating switch 7 is operated, a signal is generated and is fed to a computer 9, and the switch 7 is simultaneously reset to the original position. The computer 9 receiving the signal outputs a signal to a stepping motor 4 to drive the motor 4 in a direction for forward running or in a direction for backward direction, thereby moving a speed-changing range controlling valve 1. Then, when a spool 3 is actually moved to a predetermined position, a signal indicating the completion of the movement is sent from a position-detecting sensor 10 to the computer 9, and a lamp on the indication panel 11 is turned ON. Accordingly, the speed-changing range is identified through the turning-on of the lamp of the panel 11.</p> |
