| 摘要 |
PROBLEM TO BE SOLVED: To provide a multiple direction switching valve enabling to operate an actuator connected to a direction switching valve located on the upstream side when an actuator connected to a direction switching valve located on the downstream side is stopped due to an overload or the like, without the need for returning the direction switching valve to a neutral position.SOLUTION: The multiple direction switching valve 1 includes a boom direction switching valve 11 (first direction switching valve) connected to an unloading path 21, and a service valve 13 (second direction switching valve) connected to the unloading path 21 on the downstream side of the boom direction switching valve 11. At changeover positions 11a, 11c where the unloading path 21 on the upstream side is connected to one of boom feed/discharge paths 29, 30 and the other one of the boom feed/discharge paths 29, 30 is connected to the unloading path 21 on the downstream side, the boom direction switching valve 11 is connected to a boom valve tank return path 27 which connects the other one of the boom supply/discharge paths 29, 30 with a tank path 22. |
