PROBLEM TO BE SOLVED: To simplify setting of functions necessary for tillage work and road travelling.SOLUTION: There is provided a change-over switch for switching among a travelling position prepared for road travelling, a tilling position for standard tilling work, and an adherence position for optionally storing setting change state according to a skill level of an operator and a field environment. When the switch is operated to the travelling position, the travelling mode is switched to a road travelling mode in which modes of machine body turning control system are turned off, and two rear-wheel driving (2 WD) is mainly used. When the switch is operated to the tilling position, the travelling mode is switched to a standard tilling storage state in which modes of machine body turning control system are turned on, and front wheel acceleration control is turned on. When the switch is operated to the adherence position, the travelling mode is switched to an adherence tilling storage state in which prescribed modes of the standard tilling control state are changed and set to off from on as desired according to operations of individual operation switches. Consequently the operation is made easier.COPYRIGHT: (C)2014,JPO&INPIT【課題】耕耘作業及び路上走行に必要な機能設定の簡単化を図る。【解決手段】路上で走行を想定した「走行」位置、標準作業の「耕うん」位置、およびオペレータの熟練度や圃場環境等にて任意に変更設定状態を記憶させた「こだわり」位置に切換える切換スイッチを設け、前記切換スイッチを「走行」位置に操作すると機体旋回制御系の各モードをオフとし走行モードを後輪2輪駆動(2WD)を主とする路上走行モードに切換え、前記切換スイッチを「耕うん」位置に操作すると機体旋回制御系の各モードをオンとし前輪増速制御をオンとする標準耕うん記憶状態に切換え、前記切換スイッチを「こだわり」位置に操作すると個別操作スイッチの操作に基づき標準耕耘制御状態の所定モードを所望にオンからオフに変更設定するこだわり耕うん記億状態に切換える構成として、操作を容易化する。【選択図】 図11
