PROBLEM TO BE SOLVED: To provide a work machine in which a link mechanism supports a work device in a manner that enables the same to freely roll and rolling operation of the work device is appropriately prevented when the link mechanism is operated to be moved up to an upper limit position thereof.SOLUTION: A work machine comprises: lock members 83 which are installed on a link mechanism 4 and have contact sections 83a provided with faces along vertical and longitudinal directions of the link mechanism； and receiving members 84 which are installed on a work device and have receiving sections 84d provide with faces along vertical and longitudinal directions of the work machine. The lock members 83 are brought close to the receiving members 84 along with an upward movement of the link mechanism 4. When the link mechanism 4 is moved to an upper limit position thereof, the contact sections 83a of the lock members 83 are brought into contact with the receiving sections 84d of the receiving members 84 in a horizontal direction and thereby preventing a rolling movement of the work device.SELECTED DRAWING: Figure 9COPYRIGHT: (C)2020,JPO&INPIT【課題】リンク機構に作業装置がローリング自在に支持された作業機において、リンク機構が上限位置に上昇操作された際に、作業装置のローリング作動を適切に阻止する。【解決手段】上下方向及び前後方向に沿った当たり部８３ａを有してリンク機構４に設けられたロック部材８３と、上下方向及び前後方向に沿った受け部８４ｄを有して作業装置に設けられた受け部材８４とが備えられる。リンク機構４の上昇に伴って、ロック部材８３が受け部材８４に接近し、リンク機構４が上限位置に位置した状態において、ロック部材８３の当たり部８３ａと受け部材８４の受け部８４ｄとが、左右方向で対向して当たることによって、作業装置のローリング作動が阻止される。【選択図】図９
