PROBLEM TO BE SOLVED: To provide a hydraulic system that allows attaching/detaching of an electric connector in parallel with that of the hydraulic system.SOLUTION: In a joint attaching/detaching device of a hydraulic system between a vehicle and a working machine in a working machine vehicle where the working machine detachably attached to the vehicle is driven by a hydraulic pressure from a hydraulic drive system of the vehicle, a vehicle side joint housing 10a is fixed to the vehicle so that a first attachment/detachment surface 13 faces upward and is inclined, a first terminal E1 of an electric connector is disposed on a higher part of the first attachment/detachment surface 13, and a plurality of first joints P1, N1, T1 connected to the hydraulic drive system of the vehicle by a plurality of hydraulic hoses are disposed on a part lower than the first terminal E1.COPYRIGHT: (C)2013,JPO&INPIT【課題】本発明は、油圧装置の脱着と併せて電気コネクタの脱着も同時に行える油圧装置を提供する。【解決手段】車両に脱着可能に取付けた作業機を車両の油圧駆動系からの油圧で駆動させるようにした作業機車両における車両と作業機間の油圧系の継手脱着装置において、車両側継手ハウジング10aは、第1脱着面13を上向きかつ傾斜状態にして車両に固定配置し、この第1脱着面13の高い部分に、電気コネクタの第1端子E1を配置し、この第1端子E1よりも低い部分に、車両の油圧駆動系と複数の油圧ホースで連結された複数の第1継手P1、N1、T1を配置する。【選択図】図3
