Elastic live wire anti-falling device applied to casing pipe type drilling machine

The elastic live wire anti-falling device comprises a disc-shaped body, the side face of the disc-shaped body is provided with a plurality of connecting ports which are arranged in an annular array mode, the inner side of each connecting port is provided with a supporting claw, the middle of each supporting claw is movably connected with the corresponding connecting port through a pin, and the other end of each supporting claw is connected with the corresponding pin. Strong magnetic sheets are arranged on the inner sides of the bottoms of the supporting claws. A threaded cylinder is arranged at the top of the disc-shaped body, connecting edges are arranged on the side face of the threaded cylinder, the number of the connecting edges is equal to that of the supporting claws, the connecting edges are arranged in an annular array, springs are arranged between the connecting edges and the tops of the supporting claws, a threaded column is in threaded connection with the top of the threaded cylinder, and a hanging