| 摘要 |
PROBLEM TO BE SOLVED: To suppress an increase in a height position difference between a plurality of suspending tools at the time of acceleration or deceleration of the plurality of suspending tools.SOLUTION: In a crane device 1, when a first suspending tool 11 and a second suspending tool 21 are accelerated or decelerated, a change rate of a winding speed or a delivering speed of at least one of a first hoisting machine 5 and a second hoisting machine 6 is changed so that a change amount of values of a difference between a height position hof the first suspending tool 11 and a height position hof the second suspending tool 21 falls within a predetermined allowable range if the change amount of the values of the difference is outside the predetermined allowable range. Thus, the difference between the height position of the first suspending tool 11 and the height position of the second suspending tool 21 falls within a fixed range, thereby suppressing a great change in the difference between the height positions of two suspending tools 11, 21.SELECTED DRAWING: Figure 2 |
