| 摘要 |
PROBLEM TO BE SOLVED: To provide an overturn prevention device that can, while a work machine with an outrigger is operating, detect with high sensitivity and reliability when the work machine starts to overturn. ! SOLUTION: An outrigger is composed of an external cylinder, an inner cylinder inserted into the outer cylinder from either of left and right sides of which the inner cylinder can be pushed in or pulled out, and jacks attached to the ends of the inner cylinder. A lift detection sensor S for detecting a gap (looseness) between the outer cylinder and the inner cylinder is composed of a sensor 11 for directly detecting the gap, a proximity switch 12 for activating an alarm circuit, and balance type levers 10 that can swing about a support shaft 6, in which the sensor 11 is attached to the end of a short side 14, a distance L4 of which from the support shaft 6 is short, and the proximity switch 12 is attached to the end of a long side 15, a distance L5 of which from the support shaft 6 is long. Even |
