| 摘要 |
<p>PROBLEM TO BE SOLVED: To make the operation of jack operation lever for extending and contracting jacks physically impossible when lock pins for slide locking are in lock release positions, in an outrigger device which has lock pin operation levers for operating the lock pins and the jack operation levers.SOLUTION: A jack operation restriction device for an outrigger device includes slide beams 2 comprised of outer cylinders 21 and inner cylinders 22, jacks 3 provided at the tips of inner boxes, lock pins 4 that make the sliding of the inner cylinders impossible, lock pin operation levers 5 that actuate the lock pins, and jack operation levers 6 that extend and contract the jacks. Between the jack operation lever 6 and the lock pin control lever 5, there is provided a jack operation lever locking means 7 which makes the operation of the jack operation lever physically impossible only when the lock pin control lever is in a state where the lock pin is actuated to the lock release position. This makes the operation of the jack operation lever impossible when the lock pin is in the lock release position.</p> |
