PROBLEM TO BE SOLVED: To solve a problem that, in a case of a large yield rice, rotation speeds of a reaping device and a feed chain are conventionally increased with a layer thickness of a normal conveyed grain culm amount as a reference and thereby a load is increased to generate clogging.SOLUTION: The combine is configured as follows. A start end of a feed chain 16 of a grain culm feed conveyance device 15 for feeding and conveying grain culms to a threshing chamber 11 of a threshing device 3 faces a terminal end of a conveyance device 20 for conveying grain culms reaped by a reaping device 4. The reaping device 4 is stepless speed variable with a reaping stepless speed variator 22. When a detection value of a grain culm sensor 21 is less than a predetermined value, the reaping stepless speed variator 22 and a chain stepless speed variator 23 change speeds according to the detection value of a grain culm sensor 21. When the detection value of the grain culm sensor 21 reaches a predetermined first detection value or higher, a travel speed of a machine body is reduced while keeping speed change ratios of the reaping stepless speed variator 22 and chain stepless speed variator 23.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】従来では多収量米の場合、通常の搬送穀稈量の層厚を基準に刈取装置とフィードチェンの回転数を増速するようにすると、負荷が増加し、詰まりが発生するという課題がある。【解決手段】刈取装置4により刈り取った穀稈を搬送する搬送装置20の終端に、脱穀装置3の扱室11に穀稈を供給搬送する穀稈供給搬送装置15のフィードチェン16の始端部を臨ませ、前記刈取装置4は刈取無段変速装置22により、刈取無段変速装置22およびチェン無段変速装置23は穀稈センサ21の検出値が所定未満の場合、穀稈センサ21の検出値に応じて変速し、前記穀稈センサ21の検出値が所定の第一検出値以上となった場合、刈取無段変速装置22およびチェン無段変速装置23の変速比を維持したまま、機体の走行速度を減速させる構成としたコンバイン。【選択図】図2
