PROBLEM TO BE SOLVED: To provide simplified belt-type gear change means capable of variably controlling reaping speed of a reaping part in a combine harvester.SOLUTION: The combine harvester includes: an input shaft (16) to a threshing part (9) erected at the front part of the threshing part (9) in an attitude facing the horizontal direction an input shaft (17) to a reaping part (8) erected in an attitude parallel to the input shaft (16) threshing input pulleys (18a and 18b) and reaping input pulleys (19a and 19b) each of which integrally includes large and small different-diameter pulleys, journaled to the input shaft (16) of the threshing part (9) and the input shaft (17) of the reaping part (8) respectively and a high-speed-side transmission belt (20H) and a low-speed-side transmission belt (20L) laid across the threshing input pulleys and the reaping input pulleys. The combine harvester can be thus changed over between a state of acting a tension clutch pulley (22) operable from a drivers seat (12) on the high-speed-side transmission belt (20H) and a state of acting it on the low-speed-side transmission belt (20L).COPYRIGHT: (C)2015,JPO&INPIT【課題】本発明の課題は、コンバインにおいて、刈取部の刈取速度を変速制御する簡易なベルト式変速手段を提供することにある。【解決手段】 本発明は、脱穀部(9)の前部に左右方向を向く姿勢で架設された脱穀部(9)への入力軸(16)と、該入力軸(16)と平行な姿勢で架設された刈取部(8)への入力軸(17)とを備え、前記脱穀部(9)への入力軸(16)と前記刈取部(8)への入力軸(17)とに、大小異径のプーリを一体で備える脱穀入力プーリ(18a,18b)と刈取入力プーリ(19a,19b)をそれぞれ軸架させて設け、これら脱穀入力プーリと刈取入力プーリ間にわたって高速側伝動ベルト(20H)及び低速側伝動ベルト(20L)を掛け渡し、運転席(12)から操作可能なテンションクラッチプーリ(22)を、前記高速側伝動ベルト(20H)に作用する状態と、低速側伝動ベルト(20L)に作用する状態とに切替可能とする。【選択図】 図2
