| 摘要 |
PROBLEM TO BE SOLVED: To prevent the reverse of a working unit through shifting a working unit clutch lever into off side by the shift action when the main variable-speed lever is shifted into backward side. SOLUTION: This reverse preventive structure has the following mechanism: (1) when the main variable-speed lever 33 is shifted into backward side, a working unit clutch lever 34 is shifted into off side by the shift action, (2) between the main variable-speed lever 33 and the working unit clutch lever 34, a changeover arm 39 is interposedly set so as to function to shift the working unit clutch lever 34 into the OFF side by the action of shifting the main variable-speed lever 33 into the backward side, (3) wherein the changeover arm 39 functions to shift the working unit clutch lever 34 into the off side via an engagement hook 35 attached to the main variable-speed lever and an engagement pin 37 attached to a clutch shaft 36 by the action of shifting the main variable-speed lever 33 into the backward side, and (4) the control panel 33a for the main variable-speed lever and the control panel 34a for the working unit clutch lever are arranged nearly parallel to each other, and one side of the U-shaped control panel 34a is disposed on the control panel side for the main variable- speed lever, and on the other side of the U-shaped control panel 34a, the working unit clutch lever 34 can be operated independently of the main variable-speed lever 33.
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