PROBLEM TO BE SOLVED: To provide a working vehicle designed to improve its operating efficiency by enabling working units 5 and 28 to be driven as desired and also improve its operating accuracy by reducing the abnormal speed changes of the working units 5 and 28 attributable to miscontrol during its traveling.SOLUTION: The working vehicle has the following mechanism. First, a statically hydraulic stepless variable-speed gear (76) that drives the working units (5 and 28) is subjected to variable-speed actuation by the control of a switch (119) furnished on a variable-speed lever (S) for traveling speed change. Secondly, the statically hydraulic stepless variable-speed gear (76) is automatically driven at a predetermined speed over a set time. Thirdly, the statically hydraulic stepless variable-speed gear (76) is subjected to variable-speed actuation only when the variable-speed lever (S) is at a neutral position.COPYRIGHT: (C)2007,JPO&INPIT【課題】作業装置5,28を任意に駆動できるものとして作業能率を向上させると共に、走行中の誤操作による作業装置5,28の異常変速を少なくして作業精度を向上させる【解決手段】第1に、作業装置(5,28)を駆動する静油圧式無段変速装置(76)を走行変速用の変速レバー(S)に設けたスイッチ(119)の操作によって変速作動させられるように構成する。第2に、静油圧式無段変速装置(76)を設定時間にわたり所定の速度で自動的に駆動させられるように構成する。第3に、変速レバー(S)が中立位置にあるときにのみ、作業装置(5,28)を駆動する静油圧式無段変速装置(76)を変速作動させられるように構成する。【選択図】図3
