DRIVE CONTROLLER OF REACH-TYPE FORKLIFT

摘要

PROBLEM TO BE SOLVED: To start on a slippery road surface smoothly without requiring a special operation and avoid the early wear of front wheels and the decrease of an operation time. SOLUTION: The input terminals of the comparators 24 and 25 of a rotation detector unit 23 are connected to a right drive motor 5R and signals corresponding to the potential difference between the brushes 5Ra and 5Rb which is produced by the rotation of a right front wheel are outputted. The input terminals of the comparators 26 and 27 are connected to a left drive motor 5L and signals corresponding to the potential difference between the brushes 5La and 5Lb which is produced by the rotation of a right front wheel are outputted. A controller 22 supplies drive currents to the drive motors 5R and 5L while the drive motors 5R and 5L do not rotate at the time of the running start in accordance with the signals supplied from the comparators 24-27 through an OR circuit 28 and detection signals from a revolution sensor 11 for 3WD running.