PROBLEM TO BE SOLVED: To provide a reaping unit of a combine harvester which easily removes grain stalks clogged in a joining portion and improves maintainability.SOLUTION: The reaping unit 4 of the combine harvester 1 includes: a first lower conveying device 111, a fourth lower conveying device 114 for conveying grain stalks at the left side to the joining portion 183 arranged at the rear of the first conveying device 111, a second lower conveying device 112 and a third lower conveying device 113 for conveying grain stalks at the central left side to the joining portion 181 arranged at the conveying middle part of the fourth lower conveying device 114, the fourth conveying device 114 is equipped with a plurality of rotation wheels including a release pulley 114d arranged to face the joining portion 181 and the joining portion 183, a conveying chain 114a and clogging release means 200 for changing the position of the release pulley 114d between an operation position to move closer to the joining portion 181 and the joining portion 183 and a separation position to separate from the joining portion 181 and the joining portion 183.COPYRIGHT: (C)2011,JPO&INPIT【課題】合流部に詰まった穀稈を容易に除去することができ、メンテナンス性を向上させることが可能なコンバインの刈取部を提供する。【解決手段】コンバイン1の刈取部4において、第一下部搬送装置111と、左側の穀稈を第一下部搬送装置111の後部に設ける合流部183まで搬送する第四下部搬送装置114と、第二下部搬送装置112と、中央左側の穀稈を第四下部搬送装置114の搬送途中部に設ける合流部181まで搬送する第三下部搬送装置113とを備え、第四下部搬送装置114は、合流部181及び合流部183に臨むように配置される離間用プーリ114dを含む複数の回転輪と、搬送チェン114aと、離間用プーリ114dの位置を、合流部181及び合流部183に近接させる作業位置、並びに合流部181及び合流部183から離間させる離間位置の間で変更することが可能な詰まり解除手段200と、を備える。【選択図】図6
