| 摘要 |
<p>PROBLEM TO BE SOLVED: To smoothly operate a mechanism while rationalizing the switch operation by detecting completion of the operation, detecting the operation opposite to a described operation, and resetting the operating position to the condition before the operation or a predetermined operating position. SOLUTION: When an accelerator or a clutch is operated, an operating arm 33b of a locker 33 is drawn through a driving shaft and a coupling shaft. With this operation, a locking claw 37 of a support arm 33a of the locker 33 is removed from a claw part 36 of a tip of a lock arm 31c of a locker arm 31, and the locker arm 31 is displaced counterclockwise by the biasing force of a tensile spring 35, and an angled part projected equal to an angle part 25b is moved backward from a stepped surface 25 in the lock arm 31c, and a stepping arm 18 is moved to a valley part 25c at a central part of the stepped surface 25, and operating position is automatically reset to positions of EXH BRAKE ON, RETARDER OFF.</p> |
