PROBLEM TO BE SOLVED: To control penetration of soil into gaps among rotor plates in a walking type tilling machine having a plurality of rotor plates which are formed of rotation-symmetric plate-shaped members with a plurality of projections projecting in the outer peripheral direction and in which tilling tines are formed by folding the plurality of projections.SOLUTION: The tilling machine includes an inner tine portion 48 projecting from a surface on the side to which tilling tines 46i and 46o are bent on the inner peripheral side of the respective tilling tines 46i and 46o of the rotor plates 44Ia, 44Ib, 44Oa and 44Ob. With this structure, the soil raked up by the tilling tines 46i and 46o can be crushed or pressed to stop by the inner tine portion 48, and penetration of soil into gaps among the rotor plates 44Ia, 44Ib, 44Oa and 44Ob can be controlled.COPYRIGHT: (C)2012,JPO&INPIT【課題】外周方向に突出する複数の凸部を有する回転対称な板状部材により形成され複数の凸部が折り曲げられて耕耘爪が形成されるロータ板を複数備える歩行型耕耘機において、ロータ板同士の隙間に土が入り込むのを抑制する。【解決手段】ロータ板44Ia,44Ib,44Oa,44Obの各々の耕耘爪部46i,46oの内周側に、耕耘爪部46i,46oが曲げられた側の面から突出する内爪部48を設ける。これにより、耕耘爪部46i,46oによって掻き上げられた土を内爪部48によって粉砕したり押し止めたりすることができ、ロータ板44Ia,44Ib,44Oa,44Ob同士の隙間に土が入り込むのを抑制することができる。【選択図】図2
