PROBLEM TO BE SOLVED: To provide a lift controller for a working implement of a working vehicle which surely avoids backward movement of a machine body while a working implement is lowered, and avoids the damage of a working implement.SOLUTION: A control portion 19 liftably controls the working implement 3 liftably coupled to the back part of the machine body. The control portion 19 includes: a position controller for liftably controlling the working implement 3 according to the operation position of a position control lever 17 a backup control unit for controlling the lifting of the working implement 3 to a predetermined lifted position according to the backward movement or backward movement operation of a traveling machine body 1 and a quick-up controller for controlling the lifting of the working implement 3 to a predetermined lifted position according to the lifting operation of a quick-up lever 9, and controlling the lowering of the working implement 3 to a predetermined lowered position according to the lowering operation of the quick-up lever 9. While the working implement 3 is lifted by the backup controller, the control of lowering the working implement 3 by the quick-up lever 9 is disabled, until the backward movement or backward movement operation of the traveling machine body 1 is released.COPYRIGHT: (C)2013,JPO&INPIT【課題】作業機を下降させた状態での機体後進を確実に回避し、作業機の損傷を未然に防止する。【解決手段】機体後部に昇降可能に連結される作業機3を昇降制御する制御部19であって、該制御部19は、ポジションコントロールレバー17の操作位置に応じて作業機3を昇降制御するポジション制御手段と、走行機体1の後進又は後進操作に応じて作業機3を所定の上昇位置まで上昇制御するバックアップ制御手段と、クイックアップレバー9の上昇操作に応じて作業機3を所定の上昇位置まで上昇制御し、クイックアップレバー9の下降操作に応じて作業機3を所定の下降位置まで下降制御するクイックアップ制御手段とを備え、バックアップ制御手段によって作業機3が上昇している際には、走行機体1の後進又は後進操作が解除されない限り、クイックアップレバー9による作業機3の下降制御を無効とする。【選択図】図10
