To precisely perform stable transport and processing of a cutter or the like by strongly mechanically holding a spheroid part for adjustment work for cutting a root and a leaf being left in a harvesting time of onion such as onion and garlic, and other processing work.SOLUTION: A grip tool which is moved in going round motion comprises an interval regulation mechanism KK comprising: right angle parts Hwhich are vertically folded on a front edge of a rectangular flat plate H； an insertion groove Hinto which a root of onion can be inserted on the same right angle part H, or a parallel long groove Hdirected to a left/right pair of right angle parts Hprovided on the flat plate H； and a rod-shaped leaf side compression body Hwhich can be moved forward/backward to the right angle parts Hin a state in which the leaf side compression body protrudes to a top face of the flat plate Hthrough the long groove H. For the leaf side compression body H, the interval between the leaf side compression body Hand the right angle parts is made long or short according to a section of going round of the grip tool, for mechanically gripping the onion or releasing onion, by the leaf side compression body Hand the right angle parts H.SELECTED DRAWING: Figure 2【課題】 玉ねぎ・にんにく等の玉ねぎ類の収穫時にまだ残されている根及び葉を短く切断する調製作業等の為及びその他加工の為に球状体部分を強固に機械把持して安定した搬送とカッター等の加工処理が正確にできるようにする。【解決手段】 周回運動する把持具として、長方形の平板Ｈ１の前縁に鉛直に折曲した直角部Ｈ２を設け、同直角部Ｈ２に玉ねぎ類の根を挿入できる挿入溝Ｈ３を設け、又平板Ｈ１に左右一対の直角部Ｈ２に向った平行な長溝Ｈ４を設け、同長溝Ｈ４を介して平板Ｈ１の上面に突設するように棒状体の葉側加圧体Ｈ５を直角部Ｈ２に向けて進退自在にし、同葉側加圧体Ｈ５を把持具の周回の区間に応じて葉側加圧体Ｈ５と直角部との間隔を長くしたり、短くして葉側加圧体Ｈ５と直角部Ｈ２とで玉ねぎを機械把持又は開放ができるようにする間隔規制機構ＫＫを把持具に設けている。【選択図】図２
