PROBLEM TO BE SOLVED: To provide a perforation deep plowing machine for lawn, not damaging the lawn when a tine is pulled out of soil, and facilitating leveling after work.SOLUTION: This machine includes: a machine frame 1 mounted to the rear part of a tractor 2 and grounded on the lawn surface by a traveling auxiliary wheel 3 a rocking arm 11, which is driven at the arm forward end side by a connecting rod 12 to reciprocate up and down a tine holding member 13, the upper part of which is journaled to the rocking arm 11, and the lower part of which is rocked forward and backward in the advancing direction the tine 5 fitted to the tine holding member 13 and an energizing member 14, the base end side of which is fitted to the machine frame 1 and the distal end side of which is fitted to the tine holding member 13 below the rocking arm 11. In the state where the tine holding member 13 is fixed by the no-load energizing member 14, the tine 5 is stuck into soil in the forward inclined state with a forward angle from the vertical to the lawn surface.COPYRIGHT: (C)2013,JPO&INPIT【課題】タインを土壌内から抜き上げるときに芝生を傷めたりすることがなく、しかも作業後の整地が容易な芝生用穴あけ深耕機を提供する。【解決手段】トラクター2の後部に取り付けられて走行補助輪3により芝生面に接地する機枠1を備え、連結ロッド12によりアーム先端側が駆動されて上下往復運動をする揺動アーム11と、この揺動アーム11に上部が軸支されて下部が進行方向の前後に揺動するタイン保持部材13と、このタイン保持部材13に取り付けられるタイン5と、揺動アーム11の下方にあって基端側が機枠1に取り付けられかつ先端側がタイン保持部材13に取り付けられる付勢部材14とを備えたものであって、無負荷状態の付勢部材14によりタイン保持部材13を固定した状態ではタイン5が芝生面に対して垂直から前方に角度の付いた前向き傾斜状態で土壌内に突き刺さるようにした。【選択図】図1
