Lock pin type anti-falling device of tower crane

The utility model discloses a lock pin type anti-falling device of a tower crane, relates to the technical field of tower cranes, and is used for solving the falling problem of a jacking sleeve frame. Comprising a shell, a locking pin, a driving mechanism and a locking block, the shell is fixed to the side wall of a lug plate of a lower rotary platform of the tower crane, the locking pin is arranged in the shell in a sliding mode, the driving mechanism is located in the shell to drive the locking pin to move, and the locking block is fixed to the side wall of a sleeve frame lug plate of a jacking sleeve frame. And one end of the locking pin extends out of the shell and then is in contact with a locking table surface at the bottom of the locking block so as to support the jacking sleeve frame. The protective device is arranged between a jacking sleeve frame and a lower rotary platform of the tower crane, is simple in structure and small in size, does not influence the overall structure of the existing tower cr