AERIAL LADDER INCLUDE INDEPENDENCE TYPE EXTENSION BOOM

摘要

The present invention relates to a high-priced ladder device having a stand-alone expansion boom, and is characterized in that a plurality of ladders are connected in a stretchable manner so that all the ladders are not stretched and expanded together in one operation, To expand and contract. The elevated ladder apparatus having a stand-alone telescopic boom unit according to the present invention includes a plurality of ladder boom units mounted on a vehicle body such that the plurality of ladder boom units can be interlocked with each other in a direction in which they are stretched or contracted with each other. Expansion boom arm assembly 120. The stand-alone expansion boom arm is stretchable and extendable separately from the integral stretch boom arm assembly through the independent expansion and contraction means while being telescopically connected to the expansion boom arm of the integrated stretch boom arm assembly. The independent type extensible means can be a wire type extensible means 130 and a cylinder type extensible means 140.