PROBLEM TO BE SOLVED: To simplify particularly a lifting/lowering interlocking mechanism constitution of a front connecting device for mounting a working machine in the front side of a machine body.SOLUTION: A connecting frame 24 is provided in the front part of a machine body 1, a top link 25 and left/right lower links 26L, 26R are connected to this connecting frame 24 so as to be turned vertically, and lifting/lowering cylinder mechanisms 27L, 27R are provided between this connecting frame 24 or supporting parts 24dL, 24dR integrally provided with the connecting frame 24 and the lower links 26L, 26R. Further, brackets 24b, 24b for the top link are provided in the left and right substantially central part of an inclined plate 24N between the left and right side plates 24aL, 24aR constituting the connecting frame 24, and one end of the top link 25 is connected thereto. Further, the upper part of the lifting/lowering cylinder mechanisms 27L, 27R is connected between the brackets 24cL, 24cR and the side plates 24aL, 24aR suspended from the ceiling board 24C of the connecting frame 24, and the lower part of this is connected to the lower links 26L, 26R.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2018,JPO&INPIT【課題】機体前側に作業機を装着する前連結装置の特に昇降連動機構構成の簡素化を図る。【解決手段】 機体1の前部に連結枠24を設け、この連結枠24にトップリンク25と左右のロアリンク26L,26Rを上下に回動可能に連結すると共に、この連結枠24または連結枠24と一体的に設ける支持部24dL,24dRとロアリンク26L,26Rとの間に昇降シリンダ機構27L,27Rを設ける。なお、連結枠24を構成する左右側板24aL,24aR間の傾斜板24Nに左右略中央部にトップリンク用ブラケット24b,24bを設け、トップリンク25の一端を連結する。更に連結枠24の天井板24Cから垂下したブラケット24cL,24cRと側板24aL,24aRとの間に昇降シリンダ機構27L,27Rの上部を連結し、これの下部を前記ロアリンク26L,26Rに連結する。【選択図】 図4
