PROBLEM TO BE SOLVED: To solve a problem in operability in which a locking mechanism is provided between feed chains moving at the upper/lower sides of a rear side driving gear, and therefore an engaging hook and an open lever of a locking mechanism are configured to be turned in a vertical axis due to constraint of an installation space.SOLUTION: A combine-harvester is configured as follows: a feed chain 13 for supplying grain culm reaped with a reaping device 4 in front of a machine body to a threshing chamber of a thresher 3 is provided the feed chain 13 is turned over a front side roller 17 and a rear side driving gear 18 provided to a guide rail 16, and is turnably constituted to the outside by using a front side supporting member 20 of the up-and-down direction included in the front part of the guide rail 16 as a fulcrum a locking mechanism 25 for locking the turning of the feed chain 13 using the front side supporting member 20 as the fulcrum is provided in a part more downward than the rear side driving gear 18 of a supporting member 24 provided in a predetermined position at the rear of the guide rail 16 and an open lever 30 for releasing the engagement of an engaging hook 27 included in the locking mechanism 25 is vertically formed in a machine body side view.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2017,JPO&INPIT【課題】後側駆動歯車の上下側を移動するフィードチェンの間にロック機構を設けているため、設置スペースの制約により、ロック機構の係合フックおよびオープンレバーは縦軸回動させる構成となり、操作性に課題がある。【解決手段】機体前方の刈取装置4で刈り取った穀稈を脱穀装置3の扱室に供給するフィードチェン13を設け、該フィードチェン13は、案内レール16に設けた前側ローラ17と後側駆動歯車18に掛け回し、前記案内レール16の前部に備えた上下方向の前側支持部材20を支点として外側へ回動自在に構成し、前記案内レール16の後部の所定位置に設けた支持部材24の前記後側駆動歯車18よりも下方の部位には前記前側支持部材20を支点としたフィードチェン13の回動をロックするロック機構25を設け、該ロック機構25に備えた係合フック27の係合を解除するオープンレバー30を機体側面視において縦長に形成したコンバイン【選択図】図4
