| 摘要 |
PROBLEM TO BE SOLVED: To control to prevent increase of a speed of each actuator even when the number of actuators to be selected during interlocking operation is reduced. SOLUTION: A crane controller is provided with change-over control valves 31, 33, 32, 34 controlling a plurality of actuators 5, 8, 9, 10, a remote operation device 20 performing selection and speed operation of the actuator, and a computing device 50 which stores data of a combination pattern of actuators when operating the plurality of actuators in the interlocking relationship and required displacement amount of a main spool 35 of each change-over control valve in each combination pattern, outputs operation signal to each change-over control valve corresponding to the selected combination pattern based on selection signal and speed signal of the actuator from the remote operation device 20, and holds fixed displacement amount of the main spool 35 without changing operation signal to the change-over control valve of the actuator selected in succession when the number of actuators to be selected during interlocking operation of the plurality of actuators is reduced. COPYRIGHT: (C)2004,JPO
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