PROBLEM TO BE SOLVED: To enable a lifting/lowering speed to be adjusted in a work machine lifting/lowering device of a work vehicle connected with a work machine so as to be lifted/lowered.SOLUTION: In a work vehicle, a work machine 22 is connected to a rear part of a travel vehicle body 1 and a lifting/lowering arm 50 is turned to lift/lower the work machine 22. The work vehicle includes: a damper arm 123 turned in linkage with the lifting/lowering arm 50 and a damper 137 reducing a turning speed of the damper arm 123. In the work machine, a damper position change member 140 changing and fixing a damper fixing position in a radial direction with respect to a turning fulcrum of the damper arm 123 is arranged in the damper arm 123.SELECTED DRAWING: Figure 7COPYRIGHT: (C)2017,JPO&INPIT【課題】作業機を昇降自在に連結した作業車両の作業機昇降装置において、昇降速度を調節可能にする。【解決策】走行車体1の後部に作業機22を連結し、昇降アーム50を回動させて前記作業機22を昇降する作業車両において、前記昇降アーム50と連動して回動するダンパアーム123を有し、前記ダンパアーム123の回動速度を落とすダンパ137を設けた作業車両において、前記ダンパアーム123の回動支点に対し、径方向にダンパ固定位置を変更して固定する、ダンパ位置変更部材140をダンパアーム123に設ける。【選択図】図7
