PROBLEM TO BE SOLVED: To provide a gearshift device that is structured to have a different speed between a traveling maximum speed to a handle side in a state where a handle protrudes into a working machine side and the traveling maximum speed to the handle side in the state where the handle protrudes into an engine side, and thereby increases the working efficiency while increasing security.SOLUTION: A traveling machine body 40 includes an engine 4, a transmission stored in a transmission case 2, a ridge-forming device 12 serving as a working machine and a rotary tiller 13. A handle 14 is provided in the traveling machine body. A management machine 1 as a walking mobile agricultural machine is capable of switching between a state where the handle 14 projects to the side of the working machine and the state where the handle 14 projects to the side of the engine 4. In the management machine, restriction means 50 is provided that restricts an upper limit of a travelling speed to the side where the handle 14 is positioned. A traveling maximum speed to the handle 14 side in the state where the handle 14 projects to the working machine side is made different from the traveling maximum speed to the handle 14 side in the state where the handle 14 projects to the engine 4 side.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2018,JPO&INPIT【課題】ハンドルが作業機側に突出する状態でのハンドル側への走行最高速度と、ハンドルがエンジン側に突出する状態でのハンドル側への走行最高速度と、を異なった速度とする構造とし、安全性を高めながら、作業能率を高める操作装置を提供しようとする。【解決手段】エンジン4とミッションケース2内に収納される変速装置と作業機となる畝立器12とロータリ耕うん装置13とを備えた走行機体40にハンドル14を設け、ハンドル14が作業機の側に突出する状態とハンドル14がエンジ4ン側に突出する状態とに切換可能とした歩行型移動農機としての管理機1において、ハンドル14が位置する側への走行速度の上限を制限する制限手段50を設け、ハンドル14が作業機側に突出する状態でのハンドル14側への走行最高速度と、ハンドル14がエンジン4側に突出する状態でのハンドル14側への走行最高速度と、を異なった速度とする。【選択図】図6
