| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a quick coupler circuit of a construction machine that can control a pressure rise time or timing to stabilize an operation of a working machine during a pressure rise of a hydraulic pump and to improve fuel consumption. <P>SOLUTION: A switch 15 is constituted to be operated at two positions: a lock position when holding an attachment and an unlock position when separating the attachment. A control device 16 receives an operation signal output by operating the switch 15 to the lock position or the unlock position to perform a switching control of an electromagnetic switching valve 13 so that the pressure rise of the hydraulic pump is started and the pressure rise of the hydraulic pump is completed at a stage at which a predetermined period of time elapses. <P>COPYRIGHT: (C)2012,JPO&INPIT |
