PURPOSE: To obviate the necessity to determine the center position within a potentiometer, by outputting the signal of an accelerator lever for moving forward and reverse a cargo vehicle to a rectilinear potentiometer and, using a microswitch for advance and reverse.
CONSTITUTION: When the car body is stopping, in short, when an accelerator lever 5 is neutral, the lever 5 turns to the direction rectangular to an accelerator device 10 as shown in the Fig. At the time of advance of the car body, the accelerator lever 5 turns clockwise, and the cam 5 coaxial with the accelerator lever 5 runs to the right, too, and inserts a microswitch 7 for advance. At the same time, a rectilinear potentiometer 9 is inserted gradually at the rotational angle of the accelerator lever 5, being pushed by the lower plane of the cam 6. Moreover, at the time of reverse, the accelerator lever 5 is turned counter clockwise to turn on the microswitch for backing, and inserts the potentiometer 9. Hereby, accurate control is performed with simple mechanical constitution.
FUJITA TSUTOMU
FUKUDA TAKASHI
