| 摘要 |
PURPOSE:To enable the forward and backward movement and the speed increase/ decrease simply by means of one operating lever that stops at an optional position by providing this optional position stopping type operating lever for indicating the forward and backward movement and the speed increase/decrease and an operating position detecting means for detecting the operating position so as to control the speed of a machine body. CONSTITUTION:When the power is switched on by means of a key switch 1 so as to level an operating lever 72 positioned at a neutral point in the forward direction, the signal of a converter (a) is outputted, and a motor is driven until the outputted signal comes in accord with the output of a converter (b). Hereupon, a motor 56 for driving a clutch mechanism by the operation of a switch 72 used for shifting from the forward movement to the backward movement and from the backward movement to the forward movement is actuated. As a result, the Geneva pin 52 of the clutch mechanism is rotated so as to rotate a Geneva 51: if the Geneva 51 is rotated by a fixed angle, a clutch is changed over, and if the Geneva 51 is further rotated, a limit switch 55 is actuated by means of an actuator 53 so that the motor is rotated reversely and stops by means of the limit switch 54. The signals outputted at this time actuate the motor on the speed change side, that is, the speed change is performed by changing over the clutch so as to obtain a positive action. |
