PROBLEM TO BE SOLVED: To provide a combine harvester that safely retreats and travels in the case of some kind of abnormality related to speed change or steering operation detecting means and controllers and continues a threshing operation, etc.SOLUTION: The combine harvester includes: the first controller 200 that forms control information according to input information on the basis of detection information from the first speed change operation detecting means 141a and the first steering operation detecting means 151a and controls a hydraulic continuously variable transmission 40 for traveling and a hydraulic continuously variable transmission 50 for steering and the second controller 300 that forms control information according to input information on the basis of detection information of the second speed change operation detecting means 141b and the second steering operation detecting means 151b. The input information is mutually compared with the control information and each operation state is determined. When at least one of the input information and the control information is not coincident, the hydraulic continuously variable transmissions for traveling and steering are controlled so as to restrict a traveling speed and the drive of each operation part is restricted.COPYRIGHT: (C)2010,JPO&INPIT【課題】変速または操向操作検出手段と、制御装置と、に関わる何らかの異常が生じた場合は、安全な退避走行を可能とし、脱穀作業等については継続することができるコンバインを提供する。【解決手段】第一変速操作検出手段141aと第一操向操作検出手段151aの検出情報に基づく入力情報に応じて制御情報を生成して、走行用の油圧式無段変速装置40と操向用の油圧式無段変速装置50とを制御可能とする第一制御装置200と、第二変速操作検出手段141bと第二操向操作検出手段151bの検出情報に基づく入力情報に応じて制御情報を生成する第二制御装置300とを備え、それぞれの入力情報と制御情報とを互いに比較するとともに、それぞれの作動状態を判定し、一方が一致しない場合は、走行速度を制限するように前記走行用ならびに前記操向用の油圧式無段変速装置を制御して、各作業部の駆動を制限するように制御した。【選択図】図4
