| 摘要 |
PURPOSE:To keep the absoluble angle of a bucket constant, by controlling the bucket so that a bucket angle computed flow a boom angle, an arm angle, the bucket angle, and a tilt angle may coincide with the absolute angle of the bucket designated by a bucket absolute-angle designating means. CONSTITUTION:When a lever 10 is horizontally laid and is left as it as, then the lever 10 returns to a neutral position, and signal showing bucket rotational speed gamma<ref>=0 is applied to a switch 13, and the output of bucket absolute-angle constant-control command signal is generated. The bucket absolute-angle for a target is determined by a latch circuit 15, adders 20, 22, and an added point 21 from a tilt angle phi, a bboom angle alpha, an arm angle beta, and bucket angle gammadetected by respective detectors 17, 18, 19, 20. Signal for deviation between bucket target angle gamma<ref> and actual bucket angle gamma is applied to a flow rate control valve 25 from an added point 23 and the pressure-oil of adequate flow rate is fed to a bucket cylinder 5, and a bucket 3 is rotatably controlled to be set at the target angle gamma<ref>. |
