PROBLEM TO BE SOLVED: To provide a combine harvester improved with the efficiency of discharging operation by preventing the plugging or compression of cereal grains in the elongation and contraction of a discharging auger.SOLUTION: This combine harvester is equipped with the discharging auger 8 consisting of a vertically installed auger 4 and a horizontally installed auger 5 including a cereal grain-discharging port 9. The horizontally installed auger 5 is equipped with a base part side tube 6 which is linked with the vertically installed auger 4 and has a conveying screw 14 and a screw shaft 11 installed, a tip end side tube 7 which freely elongates and contracts toward the base part side tube 6 and has an elongation and contraction screw 15, a screw shaft 16 and a discharging port 9 installed, and an elongation and contraction-driving device 23 of the tip end side tube 7. The harvester also includes the first driving source 55 of the screw shaft 11 of the base part side tube 6, a one-way crutch 60 which is installed between the screw shaft 11 of the base part side tube 6 and the screw shaft 16 of the tip end side tube 7, and transmits the power of the first driving source 55 from the screw shaft 11 to the screw shaft 16, and a second driving source 62 independently driving the screw shaft 16 of the tip end side tube 7. The plugging of the cereal grains does not occur by contracting the tip end side tube 7 after discharging of the cereal grains in the tip end side tube 7 with the second driving source 62.COPYRIGHT: (C)2012,JPO&INPIT【課題】排出オーガの伸縮の際に穀粒の詰まりや圧縮を防止して、排出作業の効率を向上させたコンバインの提供である。【解決手段】立設オーガ4と穀粒排出口9を設けた横設オーガ5とからなる排出オーガ8を備えたコンバインにおいて、横設オーガ5は、立設オーガ4に連結し、搬送螺旋14と螺旋軸11を設けた基部側筒6と基部側筒6に対して伸縮自在であって、伸縮螺旋15と螺旋軸16と排出口9を設けた先端側筒7と先端側筒7の伸縮駆動装置23とを備え、基部側筒6の螺旋軸11の第1駆動源55と、基部側筒6の螺旋軸11と先端側筒7の螺旋軸16との間に設けられ、第1駆動源55の動力を螺旋軸11から螺旋軸16に伝達するワンウェイクラッチ60と、先端側筒7の螺旋軸16を独立駆動する第2駆動源62とを設ける。第2駆動源62により先端側筒7内の穀粒を排出後、先端側筒7を縮めることで穀粒の詰まりが発生しない。【選択図】図5
