PROBLEM TO BE SOLVED: To simplify cutting blade transmission when switching a cutting blade downward.SOLUTION: A combine is provided with a cutting blade device 15 that includes upper blades 25 and lower blades 23 in a reaping device 4 included in the front part of a machine body to reap grain culm in a field by drive, and also is provided with cutting blade posture change means for changing the cutting blade device 15 between a working posture (a) to be oriented forward and a non-working posture (b) to be oriented downward. In the combine, a crank mechanism 29 is connected in a cutting blade transmission shaft 27a where the driving force is transmitted and the cutting blade device 15 is configured to be driven by the crank mechanism 29 in both postures of the working posture (a) and the non-working posture (b). Particularly, an upper blade side driven part 30 connected to a crank arm 29b of the crank mechanism 29 is formed by the opposed right and left sidewalls 30a, 30a. The cutting blade device 15 can be turned around a support 32 in the right and left directions to constitute the cutting blade posture change means. In a side view, a rotation locus of the crank arm 29b is overlapped with a turning locus of the sidewalls 30a, 30a centering on the support 32.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2018,JPO&INPIT【課題】刈刃を下向きに切替えたときの刈刃伝動の簡素化。【解決手段】 機体の前部に備えた刈取装置4に、上刃25と下刃23を備え駆動によって圃場の穀稈を刈り取る刈刃装置15を設け、前記刈刃装置15が前方を向く作業姿勢(イ)と下方を向く非作業姿勢(ロ)とに変更する刈刃姿勢変更手段を設けるコンバインにおいて、駆動力が伝達される刈刃伝動軸27aにクランク機構29を連結し、該クランク機構29により前記作業姿勢(イ)及び非作業姿勢(ロ)の両姿勢において刈刃装置15を駆動可能な構成とする。特に前記クランク機構29のクランクアーム29bに連係する上刃側被動部30を対向する左右の側壁30a,30aで形成し、左右方向の支持体32回りに刈刃装置15を回動可能として前記刈刃姿勢変更手段を構成し、側面視において前記クランクアーム29bの回転軌跡と前記支持体32を中心とする側壁30a,30aの回動軌跡を重合させる。【選択図】 図5
