| 摘要 |
PURPOSE:To prevent the falling down of an hydraulic shovel by a method in which output signals of angle detected by the inclination angle detector of a hydraulic shovel are compared with a set angle, and when the detected angle exceeds the set angle, a buzzer is sounded. CONSTITUTION:In case where the lower traveler of a hydraulic shovel is on sloped ground and the inclination angle is great or the load is great, signals e1 from an inclinometer 18a1 become greater than set inclination angle signal e2, and high-level signals e3 are outputted from a comparator 20. In this case, when a turning lever 21 or the lever of any of other operating levers 21S1-21Sn is operated, even output signals e4 become high levels and output signals e5 of AND gate circuit 23 become high-level signals. The relay 24 is excited by the output signals e5 of high levels and a buzzer 25 is sounded. A necessary measure can soon be taken by an operator to prevent the falling down of a hydraulic shovel. |
