PROBLEM TO BE SOLVED: To enable the lifting operation and operation-stopping operation of a working unit at traveling over a ridge or at traveling after finishing the operation to be carried out easily from the ground side.SOLUTION: The operation mechanism of an agricultural working vehicle is equipped with a lifting and lowering mechanism C having a guiding operation tool 11 enabling the guiding operation of a vehicle body 1 from the ground side, and enabling the lifting and lowering drive of the working unit A mounted on the rear part of the vehicle body 1, and an intermittent mechanism B enabling the intermission of a power to the working unit A, at the front part of the car body 1, and an operation lever 17 for operation, enabling the switching operation of the lifting and lowering mechanism C and the intermittent mechanism B, arranged at a riding driving part 7. An urging means 83 for urging the operation lever 17 to the operation position at which the intermittent mechanism B becomes in an interception state and the lifting and lowering mechanism C becomes in a lifted state, and a holding means 84 enabling the operation lever 17 to be operated and held while resisting the action of the urging means 83 are also installed in the riding driving part 7, and an assistant operation tool D enabling the holding or releasing operation of the holding means 84 from the ground is installed in the guiding operation tool 11.COPYRIGHT: (C)2009,JPO&INPIT【課題】 畦越え走行時や作業終い走行時などにおける地上側からの作業装置の上昇操作や作動停止操作を容易に行えるようにする。【解決手段】 車体1の前部に、地上側からの車体1の誘導操作を可能にする誘導操作具11を備え、車体1の後部に備えた作業装置Aの昇降駆動を可能にする昇降機構Cと、作業装置Aに対する動力の断続を可能にする断続機構Bとを備え、搭乗運転部7に、昇降機構Cおよび断続機構Bの作動状態の切り換え操作を可能にする作業用の操作レバー17を配備し、操作レバー17を、断続機構Bが遮断状態となり、かつ、昇降機構Cが上昇状態となる操作位置に向けて付勢する付勢手段83と、この付勢手段83の作用に抗した操作レバー17の操作保持を可能にする保持手段84とを備え、誘導操作具11に、地上側からの保持手段84の保持解除操作を可能にする補助操作具Dを装備してある。【選択図】 図14
