PROBLEM TO BE SOLVED: To provide a thresher where, when the raking retardation of grain straw ear tip side portions is caused on the receiving plate of a threshing chamber entrance, a worker senses the trouble, artificially operates the speed change of the raking device to increase the raking speed more than a conventional speed, thus surely raking in weeds and waste straws to solve a trouble such as clogging.SOLUTION: The thresher is characterized by disposing the raking device (13) for forcibly raking and feeding grain straws into the threshing chamber (11), on the front side entrance receiving plate (8) of the threshing chamber (11), and disposing a transmission (20) for increasing the driving speed of the raking device (13) to a larger second speed than a prescribed first speed on the basis of an artificial operation. The first speed is set to a speed identical to the driving speed of a threshing feed chain (10).COPYRIGHT: (C)2012,JPO&INPIT【課題】扱室入口の受板上で穀稈穂先側部の掻込遅れが生じると、作業者がそれを察知して掻込装置を人為的に変速操作し、掻込速度が通常より速くなるように増速することによって雑草や藁屑を確実に掻き込み、詰まりなどによるトラブルを解消する。【解決手段】扱室(11)前側の入口受板(8)上に、穀稈を強制的に扱室(11)内へ掻込供給する掻込装置(13)を設け、該掻込装置(13)の駆動速度を、所定の第1速度から該第1速度よりも高速の第2速度へ人為的操作に基づいて増速させる変速装置(20)を設ける。また、前記第1速度を脱穀フィードチェン(10)の駆動速度と同一速度に設定する。【選択図】図4
