PROBLEM TO BE SOLVED: To remotely control engagement and disengagement of a lock pin, and opening and closing of an opening/closing cover through a wire.SOLUTION: A roughly triangular notch 5 is provided in a central lower part of a rear cover 4 pivoted on the rear part of a main cover 3 that covers a tillage part K. A roughly triangular opening/closing cover 6 for opening and closing the notch 5 is pivoted on the rear cover 4, and lock means 8 is provided for locking the opening/closing cover 6 in the closing posture by the insertion of a lock pin 7. One end of a wire 9 for the extraction and insertion is connected to the lock pin 7, and a wire guide member 10 that is always engaged with the wire 9 and guides it in the extraction and insertion direction of the lock pin 7 is provided in the opening/closing cover 6. Wire transfer means 11 is provided for transferring the other end of the wire 9 from a position away from the opening/closing cover 6.COPYRIGHT: (C)2014,JPO&INPIT【課題】 ロックピンの係脱と開閉カバーの開閉とをワイヤを介して遠隔操作できるようにする。【解決手段】 耕耘部Kを覆う主カバー3の後部に枢支されたリヤカバー4の中央下部に略三角形状の切欠部5を設け、この切欠部5を開閉する略三角形状の開閉カバー6をリヤカバー4に枢支し、ロックピン7の差し込みで開閉カバー6を閉鎖姿勢にロックするロック手段8を設ける。前記ロックピン7に抜き差し用のワイヤ9の一端を連結し、このワイヤ9と常時係合しかつロックピン7の抜き差し方向に案内するワイヤ案内部材10を開閉カバー6に設け、前記ワイヤ9の他端を開閉カバー6から離れた位置から移動するワイヤ移動手段11を備える。【選択図】図1
