PROBLEM TO BE SOLVED: To provide a combine harvester brought to have little possibility of misoperation and a small installation space for operation tools capable of selecting not only a high speed travelling region for roads and a medium speed travelling region suitable for reaping operation but also a low speed travelling region suitable for reaping operation of fallen stalks.SOLUTION: The combine harvester is provided by: bringing both an oil pressure pump 41 and an oil pressure motor 42 constituting a hydrostatic and continuously variable transmission device 4 to be a variable volume type setting the high speed travelling region suitable for travelling on roads, the medium travelling region suitable for reaping operation of standing stalks in a farm field and the low travelling region suitable for reaping operation of fallen stalks in a speed lower than that of the medium speed travelling region in a speed control region by the oil pressure motor 42 and equipping a first operation tool 23 for selectively switching the high speed travelling region and the medium speed traveling region and a second operation tool 24 for selectively switching the medium speed travelling region and the low speed travelling region to be freely operated, respectively.COPYRIGHT: (C)2010,JPO&INPIT【課題】路上用の高速走行域や刈取作業に適した中速走行域の他に倒伏茎稈の刈取作業に適した低速走行域をも選択可能な操作具を、誤操作の可能性が少なく、配設スペースも少なくて済むようにしたコンバインを得る。【解決手段】静油圧式無段変速装置4を構成する油圧ポンプ41と油圧モータ42とを、ともに可変容量型に構成し、油圧モータ42による速度制御域に、路上での走行に適した高速走行域と、圃場での植立茎稈の刈取作業に適した中速走行域と、中速走行域での走行速度よりも低速で倒伏茎稈の刈取作業に適した低速走行域とを設定し、高速走行域と中速走行域とを択一的に切換操作する第1操作具23と、中速走行域と低速走行域とを択一的に切換操作する第2操作具24とを、各別に操作自在に備えた。【選択図】図4
