CAR BODY ROCKING CONTROL DEVICE FOR INDUSTRIAL VEHICLE, AND INDUSTRIAL VEHICLE

摘要

PROBLEM TO BE SOLVED: To reduce unnecessary rocking restriction of an axle in an industrial vehicle controlling the rocking restriction of an axle by detecting cargo loading states and travelling states. SOLUTION: Based on the values detected by a variety of sensors provided in a fork lift, the lifting height H, load (w), side G, yaw rate changing ratio of a fork are measured. The rear axle supported on a car body frame so as to be vertically rockable in relation to a center pin is locked when a fork is heavily loaded at a high lifting height position and travels in such state as the side G and yaw rate changing rationΔY/ΔT exceed their respective threshold. A lifting height sensor comprises two limit switches capable of detecting two different lifting height. In a map to judge cargo lock conditions (high lifting height and heavy load) and determine the threshold of the side G based on the detected value of load (w) and lifting height H, the threshold (4m) of high lifting height and lifting height (2m) corresponding to the boundary where the threshold of the side G changes are set separately from each other.