| 摘要 |
PURPOSE: A safety frame structure for a crane is provided to enable a worker to efficiently perform a work even in a narrow space by extending a work area through an extension unit. CONSTITUTION: A safety frame structure for a crane comprises a safety frame (10), a rotation unit (20), and a balancing unit (30). The safety frame is installed on the end of a lift (1) and has a seating unit (11) and a handrail (12). The handrail prevents a worker from falling down. The rotation unit is installed on the bottom of the safety frame and has a bevel gear and a gear train (23). The bevel gear receives torque from a rotation motor. The gear train rotates with the bevel gear. The balancing unit is installed between the lift and the safety frame and has a rotation cylinder (31) for balancing the safety frame. |
