PROBLEM TO BE SOLVED: To solve a problem with a working machine such as a soil sterilizer wherein, while compacting is performed using a compacting roller after sprinkling of a chemical or the like and a grounding wheel is grounded on the surface of a field to detect the distance traveled by the working machine and an intermittent drive pump or the like is driven, bounding or the like could occur due to the irregularities of the surface of the field because the rotating part of the grounding wheel makes direct contact with the surface of the field, deteriorating the accuracy of detecting the distance traveled.SOLUTION: A multiple simultaneous full-surface compacting soil sterilizer 1 includes a chemical injection unit 2B, an electric motor 78, a traveled-distance detector 80 for detecting the distance traveled by the multiple simultaneous full-surface compacting soil sterilizer 1, a controller 99 that sends a drive signal to the electric signal 78 in response to a pulse signal from the contact wheel rotation sensor 89 of the detector, and a compacting roller 46 that compacts after a sprinkling operation by the chemical injection unit 2B. The traveled-distance detector 80 includes a wheel-type contact wheel 87. The contact wheel 87 rotates on contact with a roller surface 46b above the compacting roller 46 and operates the contact wheel rotation sensor 89.COPYRIGHT: (C)2013,JPO&INPIT【課題】従来より、土壌消毒機等の作業機では、薬剤散布等を施した後に鎮圧ローラで鎮圧すると共に、該圃場面に接地輪を接地して作業機の移動距離を検知し、間欠駆動ポンプ等を駆動していたが、接地輪の回転部分が圃場面に直接接触するため、圃場面の凹凸によるバウンド等が生じ、移動距離の検知精度が悪化する、という問題があった。【解決手段】薬液注入部2B、電動モータ78、マルチ同時全面鎮圧土壌消毒機1の移動距離を検知する移動距離検知装置80、その接触輪回転センサ89からのパルス信号により電動モータ78に駆動信号を送信するコントローラ99、及び薬液注入部2Bで散布作業後に鎮圧する鎮圧ローラ46を備えたマルチ同時全面鎮圧土壌消毒機1にて、移動距離検知装置80は車輪式の接触輪87を備え、該接触輪87は、鎮圧ローラ46の上方でローラ表面46bに接触して連動回転し、接触輪回転センサ89を作動させる。【選択図】 図4
