| 摘要 |
<p>PURPOSE:To prevent danger, by maintaining an associated relationship among several actuators even if combined operation is made between a plurality of actuators which are driven in the associated relationship, and the other actuators. CONSTITUTION:Selector valves 60b, 63b are disposed in pipe lines connecting hydraulic pumps 10, 13 with travelling motors 41, 42, and are selectively changed over to connect actuators consisting of a plurality of travelling motors 41, 42 and a plurality of hydraulic cylinders 40, 43 with hydraulic pumps 10, 11, 12, 13 in an equal number after checking the relationship between the hydraulic pumps 10, 13 and the hydraulic cylinders 40, 43, and as well the relationship between the hydraulic pumps 10, 13 and the travelling motors 41, 42 with respect to the respective hydraulic pumps 10, 13. With this arrangement, even in the case of the combined operation of the travelling motors 41, 42 and the hydraulic cylinders 40, 43, a predetermined relationship between the travelling motors 41, 42 and the hydraulic cylinders 40, 43 may be maintained. Accordingly danger may be prevented.</p> |
