PROBLEM TO BE SOLVED: To obtain communication for a rational oil path of an external hydraulic pressure take-out valve of a tractor, with a working machine lifting and lowering control valve.SOLUTION: A base element 16 is attached on the upper surface of a hydraulic housing 8 which includes a hydraulic cylinder external hydraulic pressure takeout valves 18a, 18b are set at the both sides of the base element 16, oil paths O2, O3 supplying pressured oil from the base element 16 to the external hydraulic pressure takeout valves 18a, 18b at the both sides of the base element 16 an input port P for supplying the pressured oil from the hydraulic housing 8 to the oil paths and a tank port T for discharging the pressured oil supplied from t actuators 17a, 17b, are set at the inside of the base element 16 a lifting and lowering control valve 11 is set on the side surface of the hydraulic housing 8 including the hydraulic cylinder and an output port N recovering at the neutral position of the external hydraulic pressure discharge valves 18a, 18b, the pressured oil respectively supplied to the valves 18a, 18b is communicated with the lifting and lowering control valve 11.COPYRIGHT: (C)2009,JPO&INPIT【課題】トラクタの外部油圧取出バルブと作業機昇降用制御バルブの合理的な油路の連通を図る。【解決手段】油圧シリンダを内装した油圧ハウジング8の上面にベース部材16を取付け、該ベース部材16の両側に外部油圧取出バルブ18a、18bを配置して、ベース部材16からその両側の外部油圧取出バルブ18a,18bに圧油を供給する油路O2,O3と、該油路に油圧ハウジング8から圧油を供給するための入力ポートPと、外部油圧取出バルブ18a,18bから各種アクチュエータ17a、17bへ送油した圧油を排出するタンクポートTとをベース部材16内に設け、油圧シリンダを内装した油圧ハウジング8の側面に昇降用制御バルブ11を設け、外部油圧取出バルブ18a、18bの中立位置にて該バルブ18a、18bへそれぞれ供給した圧油を回収する出力ポートNと昇降用制御バルブ11とを連通する。【選択図】図9
