| 摘要 |
PROBLEM TO BE SOLVED: To shorten the operation time of an auger, to improve operation efficiency, to smooth an operation to increase operability and to save a fuel cost by increasing and decreasing the number of revolutions of an engine corresponding to each action of rise, rotation and discharge of auger. SOLUTION: When the rise of auger 3 is detected by an auger rotating lever 62 or an auger position sensor 64, an axle control motor 57 is rotated and a throttle is opened. The number of revolutions of an engine is increased from an idle rotation to a rating while subjecting the detected values of an engine rotation sensor 55 and an axle position sensor 56 to feedback. Then at a point of time when the auger 3 is transferred from rise to rotation, the number of revolutions of the engine is decreased, for example, to about 2,000 rpm. At a point of time the rotation is finished and position adjustment is completed when the tilting of an unhulled rice discharge lever 63 is detected, the number of revolutions of the engine is increased again.
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