PROBLEM TO BE SOLVED: To obtain excellent traveling performance and work performance by properly setting a driving revolution speed of a power engine correspondingly to various conditions.SOLUTION: In the working machine which is provided with a traveling vehicle body equipped with a travel propulsion body and the power engine, a working section that can be lifted/lowered via a lifting and lowering link apparatus and is placed behind the traveling vehicle body, a lifting and lowering actuator for lifting and lowering the lifting and lowering link apparatus, and a lifting and lowering motions operating instrument for driving the lifting and lowering actuator to thereby lift and lower the working section, and in which the power engine drives the travel propulsion body and the lifting and lowering actuator, when the lifting and lowering actuator lifts and lowers the working section, if the travel motion propulsion body is at a stop, the driving revolution speed of the power engine is allowed to rise to a preset revolution speed for a lifting motion.COPYRIGHT: (C)2012,JPO&INPIT【課題】 本発明は、種々の条件に対応して原動機の駆動回転数を適正に設定し、良好な走行性能及び作業性能を得ることを課題とする。【解決手段】 走行推進体と原動機を備える走行車体を設け、走行車体の後側に昇降リンク装置を介して作業部を昇降可能に設け、昇降リンク装置を昇降させる昇降用アクチュエータを設け、原動機は走行推進体と昇降用アクチュエータを駆動する構成とし、該昇降用アクチュエータを駆動させて作業部を昇降操作する昇降操作具を設けた作業機において、昇降用アクチュエータが作業部を上昇作動させるとき、走行推進体が停止する状態であれば原動機の駆動回転数を上昇用の設定回転数まで上昇させる構成とした。【選択図】図7
