PROBLEM TO BE SOLVED: To provide a rotary tiller, stabilizing the dispersion position of cultivated soil rolled up in a tilling part and stabilizing the leveling effect of the soil surface in an apron without being influenced by filling depth.SOLUTION: In a deep plowing operation, when an apron 3 is pushed up, an apron cover 22 and a fastening member 25a disposed in the apron 3 move to a position higher than an extension part member 26 and tilling work is performed while they keep the state of being separate from the extension part member 26. Since the extension part member 26 and a rear cover 21 are not influenced by the push-up movement of the apron 3, the distance K from a tilling part 9 is kept constant similarly to the state in a shallow tilling operation, so that the cultivated soil rolled up in the tilling part 9 collides with the rear cover 21 which covers the rear upper side of the tilling part 9 and always keeps the distance K from the tilling part 9 constant and drops in the vicinity of the tilling part.COPYRIGHT: (C)2014,JPO&INPIT【課題】耕耘深さの影響を受けることなく、耕耘部において巻き上げられた耕土の飛散位置を安定させ、エプロンにおける土面の均平効果を安定させることができるロータリ耕耘機を提供する。【解決手段】深耕作業時に、エプロン3が押し上げられたことにより、エプロン3に配設されたエプロンカバー22及び締結部材25aは、延設部材26より高い位置に移動して、延設部材26とは離れた状態を維持しながら耕耘作業を行うこととなる。延設部材26及び後方カバー21は、エプロン3の押し上げ移動の影響を受けることがないため、浅耕作業時の状態と同じく、耕耘部9との距離Kを一定に維持することができ、このため、耕耘部9において巻き上げられた耕土が、耕耘部9の後ろ上方を覆うとともに耕耘部9との距離Kを常に一定に維持する後方カバー21に衝突して、耕耘部近傍に落ちることとなる。【選択図】図5
