PROBLEM TO BE SOLVED: To accurately operate a steering drive part and lifting drive part on the basis of an oscillation operation of a steering lever and to easily perform assembly processing of the operation lever with the steering drive part and lifting drive part.SOLUTION: A steering unit U1 linking an operation lever 13 and a steering drive part and a lifting unit U2 linking the operation lever 13 and a lifting drive part are arranged. In the steering unit U1, lifting unit U2, or both, when an operation position of the operation lever 13 is in a predetermined range, or a steering resistance acted on an output operation body 71 is in a predetermined range, the output operation body 71 follows an oscillation operation of the operation lever 13. When the operation position exceeds the predetermined range or the operation resistance exceeds the predetermined range, the output operation body 71 does not follow the operation lever 13 and the operation lever 13 is allowed to be operated solely.SELECTED DRAWING: Figure 9COPYRIGHT: (C)2016,JPO&INPIT【課題】操作レバーの揺動操作に基づく操向駆動部や昇降駆動部の作動が精度良く行われるように、かつ操作レバーと操向駆動部や昇降駆動部との組み付け加工も容易に行い易くする。【解決手段】操作レバー13と操向駆動部とを連係する操向ユニットU1と、操作レバー13と昇降駆動部とを連係する昇降ユニットU2とが備えられ、操向ユニットU1又は昇降ユニットU2あるいはその両方において、操作レバー13の操作位置が所定の領域内、又は出力操作体71に作用する操作抵抗が所定の範囲内では、出力操作体71が操作レバー13の揺動作動に追従し、操作位置が所定の領域を越えるか、又は操作抵抗が所定の範囲を越えると、操作レバー13に対して出力操作体71が追従せずに操作レバー13の単独作動を許容する状態にした。【選択図】図9
