PROBLEM TO BE SOLVED: To inhibit thrust and drag of a pretreatment part with respect to the ground surface.SOLUTION: A combine 1 comprises: a pre-treatment part 2 that is connected in a movable manner in an up and down direction to a front part of a machine body, and that mows culms in a downward movement state a threshing part 3 that threshes the mowed culms to select grains a grain tank 4 that stores the selected grains and a discharge auger 5 that discharges the grains in the grain tank 4 to the outside. The combine 1 comprises working state determining means that determines non-mowing working state and/or grain-discharge working state, pre-treatment downward-movement determining means that determines downward movement state of the pre-treatment part 2, and travel prohibition means that prohibits the machine body in the non-mowing working state and/or the grain discharge working state and in the pre-treatment downward-movement state from travelling.COPYRIGHT: (C)2015,JPO&INPIT【課題】地面に対する前処理部の突っ込みや引きずりを防止する。【解決手段】機体の前部に昇降自在に連結され、下降状態で茎稈を刈り取る前処理部2と、刈り取った茎稈から穀粒を脱穀して選別する脱穀部3と、選別された穀粒を貯溜する穀粒タンク4と、穀粒タンク4内の穀粒を機外に排出する排出オーガ5とを備えるコンバイン1であって、該コンバイン1は、非刈取作業状態及び/又は穀粒排出作業状態を判断する作業状態判断手段と、前処理部2の下降状態を判断する前処理下降判断手段と、非刈取作業状態及び/又は穀粒排出作業状態で、かつ前処理下降状態のとき、機体の走行を禁止する走行禁止手段とを備える。【選択図】図6
