| 摘要 |
The present invention relates to a truck crane having reinforced rigidity of a column. A load is concentrated on a column when the disclosed truck crane lifts up a boom system or is extended. Therefore, a crack and deformation are generated in the column. Accordingly, structural strength and stability are reduced and the column cannot be minimized and reduce weight. To solve these problems, the present invention enables a pair of an upper and a lower tension bar installed on the upper side and the lower side in the rear side of the column to compensate the load concentrated on the column. The truck crane enables a tension control holder of the upper and the lower tension bar to rotate/reverse rotate and improves smoothness of an assembling work and maintains optimized tension. |
