PROBLEM TO BE SOLVED: To solve problems in which a conventional threshing incompletion phenomenon occurs often due to continuation of a shallow threshing state.SOLUTION: A combine comprises: a reaping device 4 on a front side of a travel unit 2； a thresher 3 on an upper side of the travel unit 2, in which grain culm reaped by the reaping device 4 is held and transported and delivered to a grain culm supply/transport device 16. The combine further comprises a threshing depth adjuster 15, and a threshing depth adjustment by the threshing depth adjuster 15 is performed by automatically driving a threshing depth adjustment motor 20 which actuates the threshing depth adjuster 15 based on a detection result of an ear tip position of the grain culm by a first ear tip sensor 23 and a second ear tip sensor 24 of a depth sensor S. When a threshing depth position detection part 22 for detecting a threshing depth adjusted by the threshing depth adjuster 15 continuously detects a deep threshing position for a prescribed period, it is determined that the threshing depth sensor S is in a detection failure state, and the output to the threshing depth adjustment motor 20 is automatically stopped.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】従来、浅扱ぎ状態の連続による扱ぎ残し現象が多発するという課題がある。【解決手段】走行装置２の前方に刈取装置４を設け、前記走行装置２の上方に脱穀装置３を設け、刈取装置４で刈り取った穀稈を挟持して搬送し、穀稈供給搬送装置１６に受け渡す構成としたコンバインにおいて、扱深さ調節装置１５を設け、扱深さ調節装置１５による扱深さ調節は、深さセンサＳの第一穂先センサ２３と第二穂先センサ２４による穀稈の穂先位置の検出結果に基づいて、扱深さ調節装置１５を作動させる扱深さ調節モーター２０を自動的に駆動して行う構成とし、前記扱深さ調節装置１５によって調節された扱深さを検出する扱深さ位置検出部２２が所定時間にわたって深扱ぎ位置を検出し続けた場合に、扱深さセンサＳの検出不良状態と判定し、扱深さ調節モーター２０への出力を自動的に停止する構成としたことを特徴とするコンバイン。【選択図】 図１
