PROBLEM TO BE SOLVED: To solve the problems of a conventional soil disinfector attached to a walking-type plant husbandry machine having constructional elements of the soil disinfector placed usually on an attaching frame of the husbandry machine, keeping a high load applied to a worker in the case of using a heavy chemical tank to be placed near the top of the husbandry machine and large variation of the longitudinal weight balance of the machine body according to a consumption of the chemicals owing to the separation of the tank from axle of a traveling wheel.SOLUTION: The attaching frame 67 for attaching a plurality of constructional elements including the chemical tank 30 is fixed at the front or rear end of the husbandry machine 2, arms 69/70 are placed at right and left of the attaching frame 67 interposing the husbandry machine 2 between the arms, the arms 69/70 are positioned near a horizontal plane 77 passing the upper end of the traveling wheels 3L/3R on rotation planes 79L/79R of the traveling wheels 3L/3R or at right and left outside of the planes, the chemical tank 30 is placed on at least one of the arms 69/70, and the gravity center 30c of the chemical tank 30 is positioned within longitudinal width 78 of the traveling wheels 3L/3R by plane view.COPYRIGHT: (C)2011,JPO&INPIT【課題】歩行型管理機に装着して薬液を土壌中に注入する土壌消毒機では、従来より管理機の取付フレーム上に土壌消毒機の構成部材を配置するが、重い薬液タンクについては、管理機の上部近傍に配置されるため作業者への負担が大きく、走行輪の車軸から離間しているため薬液消費に伴う機体の前後重量バランスの変動も大きかった。【解決手段】管理機2の前後一端部に、薬液タンク30を含む複数の構成部材を取り付ける取付フレーム67を固設し、該取付フレーム67に管理機2を挟んで左右にアーム69・70を設け、該アーム69・70は、走行輪3L・3Rの上端部を通る水平面77の近傍で、走行輪3L・3Rの回転面79L・79R上又はそれより左右外側に配置し、該アーム69・70の少なくとも一方に前記薬液タンク30を載置し、該薬液タンク30は平面視で走行輪3L・3Rの前後幅78内に重心30cが収まるよう配置した。【選択図】 図4
