PROBLEM TO BE SOLVED: To provide a plowing device capable of taking the highest lift up position of a rear part cover as high in the plowing device supporting the front end side of the rear part cover at the machine frame side as freely right and left rotatable around a shaft so as to make the rear part cover covering the rear direction of a plowing part installed at the lower part of a machine frame freely vertically rock, pivoting the one end side of a gas spring at the machine frame side bracket installed at the machine frame side so as to energize the rear part cover to the lower directional side by a gas spring equipped with a tube and a piston rod as freely projecting and retreating by a gas pressure from the tube, and also pivoting another end side at a rear part cover side bracket installed at the rear part cover side.SOLUTION: This plowing device is provided by positioning a pivoting point X of the one end side or the other end side of the gas spring 27 at a further inner directional side in the lengthwise direction of the gas spring 27 than the mounting part 51 of the gas spring 27 presenting at the same side with the pivoting point X.COPYRIGHT: (C)2010,JPO&INPIT【課題】 機枠の下部に設けた耕耘部の後方を覆う後部カバーを上下揺動自在とすべく該後部カバーの前端側を機枠側に左右軸回りに回動自在に支持し、チューブと該チューブからガス圧によって出退自在に突出するピストンロッドとを備えたガススプリングによって後部カバーを下方側に付勢するように、該ガススプリングの一端側を機枠側に設けた機枠側ブラケットに枢支すると共に他端側を後部カバー側に設けた後部カバー側ブラケットに枢支した耕耘装置において、後部カバーの最上げ位置を高く採ることができる耕耘装置を提供する。【解決手段】 ガススプリング27の一端側又は他端側の枢支点Xを、該枢支点Xと同じ側にあるガススプリング27の取付部51よりもガススプリング27の長さ方向の内方側に位置させる。【選択図】図1
