RUNNING ALIGNING SPEED CONTROLLER FOR BRIDGE-SHAPED CRANE

摘要

PROBLEM TO BE SOLVED: To provide a running aligning speed controller for a bridge-shaped crane necessitating no constituent element requiring large cost for installation and maintenance such as a rack. SOLUTION: This running aligning speed controller has a first position detector 18 and a second position detector 19 for detecting positions of both leg parts of a bridge-shaped crane and a control part 15' aligning running speeds so that a girder of the bridge-shaped crane takes a positional relation orthogonal to a running rail based on the positions of both leg parts detected by these position detectors. A third position detector and a fourth position detector by means of GPS are provided in both leg parts, respectively. The control part compensates to the positions detected by the first and second position detectors based on data of the positions detected by the third and fourth position detectors and the positions detected by the first and second position detectors.