Document Type and Number:
Japanese Patent JPH0423757
Kind Code:
B2
Abstract:
PURPOSE:To calculate an operation cycle time by detecting wehther the crane is in process of upward winding or downward winding by a lift detector, and detecting variation in the loading of a suspended load by a load detector and computing the points of ground release and unloading by a computer. CONSTITUTION:The computer 15 inputs the kind of the suspended load and also inputs a signal indicating the upward or downward winding process from the lift detector 13. Further, the unloading point is detected similarly by the load detector 10 as well as the ground release point. The ground release point and unloading point detected by the detector 10 are inputted to the computer 10, which subtracts the ground release point from the unloading point to calculate the movement time of the suspended load, and also subtracts the next ground release point from the ground release point. Consequently, the operation cycle time of the crane is calculated without troubling a crane operator.
Inventors:
SHIBATA MANABU
Application Number:
JP17238084A
Publication Date:
April 23, 1992
Filing Date:
August 21, 1984
Export Citation:
Assignee:
KAJIMA CORP
International Classes:
G04F10/04; B66C13/46; B66C13/48; G04F10/00; G07C3/04
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