BOARDING BRIDGE OF ROTUNDA HEIGHT ADJUSTMENT DEVICE

摘要

A rotunda height adjustment device for a boarding bridge is disclosed. The rotunda height adjustment device for a boarding bridge comprises: an external column fixating a rotunda and lifted up and down; an internal column connected to the external column and fixated on the ground; a vertical screw fixated on a lower end of the rotunda; a nut formed to be engaged corresponding to an outer diameter of the vertical screw in the central portion inside the external column or the internal column; and a rail installed in a side of the external column or the internal column and formed to be corresponded to each other to help the external column to be lifted up and down. A side load can be distributed by the rail and the nut. A gap capable of assembling the external column and the internal column is maintained, and the occurrence of bending of the vertical screw is reduced, thereby distributing the side load of the rotunda height adjustment device.