PROBLEM TO BE SOLVED: To solve problems accompanying the digging motion of a knife body unit on one side into an inner layer of soil without stopping a tractor.SOLUTION: The farm work machine includes a digging depth adjusting mechanism 22 composed of a first digging depth adjustment drive mechanism 24, a second digging depth adjustment drive mechanism 25 and a synchronized adjusting mechanism 23. The first digging depth adjustment drive mechanism 24 and the second digging depth adjustment drive mechanism 25 lift up/down a first part 11L and a second part 11R on both sides with knife body units 12 for holding a connection part 13 of a support frame 11 to be pulled by the tractor 1. The synchronized adjusting mechanism 23 synchronizes these mechanisms 24 and 25 to simultaneously lift up/down the first part 11L and the second part 11R with the same stroke.COPYRIGHT: (C)2012,JPO&INPIT【課題】 片側ナイフ体ユニットの土壌の内層への食い込み掘削動作に伴う問題解決を、トラクタを停止することなく解決する。【解決手段】 トラクタ1に牽引される支持フレーム11の連結部13を挟むナイフ体ユニット12を付設した左右両側の第1部位11Lと第2部位11Rを昇降動作させる第1掘削深さ調整駆動機構24と第2掘削深さ調整駆動機構25とこれらの機構を同期させて第1部位11Lと第2部位11Rを同一ストロークで同時に昇降動作させる同期調整機構23とからなる掘削深さ調整機構22を備える。【選択図】 図4
