PROBLEM TO BE SOLVED: To prevent an automatic device from lifting and lowering a puddling machine in a scene in which it is not necessary to lift or lower a puddling machine.SOLUTION: An agricultural work machine includes a machine body for rotatably supporting a rotary working part for performing tilling work, a cover part provided to the machine body for covering the upper part of the rotary working part, an apron supported at the rear end part of the cover part, a support member attached to the back face of the apron, and an apron rotation control part attached to the cover part that switches the state between an apron pressure applied state and an apron pressure release state. The apron rotation control part includes a rod part whose rear end part is slidably attached to the support member, a first spring part mounted on the rod part, an arm part rotatably supports a front end part of the rod part, which is rotatably supported relative to the cover part, a cam bracket rotatably supported by a cam bracket rotation shaft, which has a contact part, and a drive part for rotating the cam bracket.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】代かき作業機を昇降させる必要がない場面において、オート装置が代かき作業機を昇降させることを防止する。【解決手段】本発明の一実施形態に係る農作業機は、耕耘作業を行うロータリ作業部を回転自在に支持する機体と、機体に設けられ、ロータリ作業部の上部を覆うカバー部と、カバー部の後端部に支持されたエプロンと、エプロンの背面に取り付けられた支持部材と、カバー部に取り付けられ、エプロン加圧状態とエプロン加圧解除状態とに切り替えるエプロン回動制御部と、を備え、エプロン回動制御部は、後端部が支持部材に対して摺動可能に取り付けられたロッド部と、ロッド部に装着された第1バネ部と、ロッド部の前端部を回動自在に支持し、カバー部に対して回動自在に支持されるアーム部と、カムブラケット回動軸に回動自在に支持され、接触部を有するカムブラケットと、カムブラケットを回動させる駆動部と、を有する。【選択図】図1
