| 摘要 |
PROBLEM TO BE SOLVED: To improve threshing performances of a threshing part prepared by arranging screw type rotors having a rotation shaft line in the left and right directions in a parallel form in the front and rear in the upper front of a grading device at the rear of a reaping part of a general-purpose combine harvester, covering the nearly lower half of each rotor in the front, and rear with a circular arc-shaped receiving net, covering the nearly upper half of each rotor with a cover making either one of left and right lateral parts of the rotors in the front and rear communicate with a communicating port and forming a discharging port at the other end of the rotor at the rear. SOLUTION: This threshing part for a general-purpose combine harvester is obtained by rotating a rotor 21 at the front in the rotative direction opposite to the rotative direction of the rotor 22 at the rear, locating the rotating shaft in the left and right directions of the rotor 22 at the rear at a lower level than that of the rotating shaft of the rotor 21 at the front, extending the front surface of a cover of the rotor 22 at the rear on the side of a communicating port 36a to the upper front of the outer peripheral surface of the rotor 22 and extending the rear surface of the cover of the rotor 22 at the rear on the side of a discharging port 36b to the upper rear of the outer peripheral surface of the rotor 22 and further arranging a grain discharging beater 61 at the rear of the rotor 22 and on the upper side of the rear of a grading device.
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