Folding ladder railing system for passing through portal crane boom platform

• Main Authors: YAO KEHAI, PING ZHIQIN, AHN HO-YEON, SHU PENG, LU QIANG, HAO CHAO, CHEN CHUNCHUN, GUO QIONGYUAN, ZHU YI
• Format: Patent
• Language: Chinese; English
• Published: 09.12.2022
• Subjects: CRANES; DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; FIXED CONSTRUCTIONS; HAULING; HOISTING; LADDERS; LIFTING; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS,WINCHES, OR TACKLES; PERFORMING OPERATIONS; TRANSPORTING

The utility model discloses a folding ladder railing system of a passing portal crane boom platform. The folding ladder railing system comprises a supporting platform, a lower section ladder, a middle section ladder and an upper section ladder, the supporting platform is horizontally fixed to the side face of a boom structure of the portal crane. The lower section ladder is a straight ladder and is arranged at a neutral position between a cab of the gantry crane and a boom structure, and the upper end of the lower section ladder is rotationally connected with the side surface of the boom structure; when being put down, the lower end of the vertical ladder is arranged on the supporting platform; the middle section ladder comprises a plurality of foot bars; the foot bar is fixed on the side surface of the arm support structure; the plurality of foot bars are distributed at intervals and are arranged upwards from the top of the vertical ladder to the upper edge of the arm support structure; the upper section lad