PROBLEM TO BE SOLVED: To provide a combine harvester capable of instantaneously stopping traveling motion in the case of occurring any abnormality in a speed changing or steering operation detecting means or a controlling device to control a hydraulic continuously variable transmission based on the operation of these means.SOLUTION: The combine harvester is provided with: a first controller 200 to produce control information according to input information based on detection information of a first speed change operation detection means 141a and a first steering operation detection means 151a and control a hydraulic continuously variable transmission 40 for traveling and a hydraulic continuously variable transmission 50 for steering and a second controller 300 to produce control information according to input information based on detection information of a second speed change operation detection means 141b and a second steering operation detection means 151b. The input information and control information of each controller are compared and the action states are judged. When these states do not coincide, the traveling motion is stopped by controlling the hydraulic continuously variable transmission 40 for traveling and the hydraulic continuously variable transmission 50 for steering.COPYRIGHT: (C)2010,JPO&INPIT【課題】変速または操向操作検出手段と、これらの操作に基づいて油圧式無段変速装置を制御する制御装置と、に関わる何らかの異常が生じた場合は、走行を即座に停止することができるコンバインを提供することを目的とする。【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、一致しない場合は、前記走行用の油圧式無段変速装置40ならびに前記操向用の油圧式無段変速装置50を制御して走行を停止するようにした。【選択図】図4
