PROBLEM TO BE SOLVED: To provide a travel controller for a combine harvester, properly driving a thresher at the turning in a butt, and capable of properly carrying out the turning in the butt in a state of avoiding the insufficiency of a driving force for the traveling.SOLUTION: The travel controller 79 executes an operation power-controlling treatment for controlling the action of an operation power-controlling means 58 for changing and controlling the operation power of a holding means 56 for holding an operation part 7Ma against the power of being shifted to the low-speed side by an operation power for shifting and operating the operation part 7Ma to the high-speed side so that the operation part for the volume change in a hydraulic motor 7M of a hydrostatic infinite variable-speed drive 7 for traveling may be kept at a set target position. The travel controller also executes an operation power-controlling treatment just after the reaping treatment, for controlling the action of the operation power-controlling means 58 in a way of not increasing the operation power of the holding means 56 beyond the set upper limit value just after the reaping treatment even when the operation part 7Ma is shifted to the lower-speed side than the set target position after the detection of the turning from a reaping operation state to a non-reaping operation state by a reaping operation state-detecting means U.COPYRIGHT: (C)2010,JPO&INPIT【課題】枕地での旋回の際にも脱穀装置を適正に駆動し、しかも、枕地での旋回を走行用の駆動力の不足を避けた状態で適切に行えるコンバインの走行制御装置を提供する。【解決手段】走行用の静油圧式無段変速装置7の油圧モータ7Mにおける容量変更用の操作部7Maを設定目標位置に維持させるように、その操作部7Maが低速側に移動するのを高速側に移動操作する操作力にて保持する保持手段56の操作力を変更調整する操作力調整手段58作動を制御する操作力調整処理を実行する制御手段79が、刈取作業状態検出手段Uにて刈取作業状態から非刈取作業状態切り換ったことが検出されたのちにおいては、操作部7Maが設定目標位置よりも低速側に移動しても、刈取処理直後用の設定上限値を超えて保持手段56の操作力を増加させない形態にて操作力調整手段58の作動を制御する刈取処理直後用の操作力調整処理を実行するように構成されている。【選択図】図4
