LIFTING HEAVY MATERIALS APPARATUS USING PULLEY AND METHOD THEREOF

摘要

PURPOSE: A core type lifting device and a lifting method thereof are provided to facilitate to install in a high-rise site and to enable to lift heavy materials by a small structure. CONSTITUTION: A core type lifting device comprises external and internal frames(100,200), a fixing transport unit(300), and first and second cylinders(400,500). The external frame comprises a vertical member(110), a horizontal member(120), and a guide roller(130). The internal frame is formed inside the external frame for vertically moving, is formed with an entrance(210), and is equipped with a guide roller. The first cylinder is fixed to the fixing transport unit for vertically moving the external frame. The second cylinder vertically moves the internal frame.