PROBLEM TO BE SOLVED: To prevent a working machine from being broken or handling of a ground work vehicle from becoming unstable because an operation to lift the working machine is neglected to drag it while being grounded on the ground, when traveling on a street and a parking lot by the ground work vehicle.SOLUTION: Working machine lifting/lowering control of a ground work vehicle is characterized in that an agricultural machine liftably mounting a working machine 17 is provided with location recognition means 160 for identifying whether the present location of a machine body is a work place or the place other than that and lowering detection means 161 for detecting the lowering lower than a grounding or a predetermined height of the working machine 17, and controls not to travel even if the traveling start operation is performed when being in a non-working state where the location recognition means 160 recognizes any place other than the work place and the grounding detection means 161 detects the lowering in the start of traveling.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2016,JPO&INPIT【課題】本発明は、対地作業車で路上や駐車場を走行する際に、作業機を上昇させる操作を怠って地面に接地させたままで引き摺って作業機を破損したり対地作業車の操縦が不安定になったりすることを防止することを課題とする。【解決手段】作業機17を昇降可能に装着した農作業機において、機体の現在地が作業地かそれ以外かを識別する所在地認識手段160と作業機17の接地或いは所定高さ以下の降下を検出する降下検出手段161を設け、走行開始時に所在地認識手段160が作業地以外を認識し接地検出手段161が降下を検出する非作業状態であると、走行開始操作を行っても走行しないように制御したことを特徴とする対地作業車の作業機昇降制御の構成とする。【選択図】図5
