Device for building tower crane lifting hook

Device for building tower crane lifting hook, including the pulley frame, the steel wire rope gyro wheel is installed in the said pulley frame, around having steel wire rope, its characterized in that on the said steel wire rope gyro wheel: the electro-magnet both sides are equipped with round pin piece, the removable pin pass round pin piece and pulley frame with electro-magnet swing joint below the pulley frame, said electro-magnet side is equipped with the weight inductor, and the signal box is installed in one side of pulley frame, is connected with signal transmission line no. 1 between its and the weight inductor, the signal box still is connected with signal transmission line no. 2 with the tower crane control room. Compared with the prior art, the utility model has the advantages that: : through the metal that electric strength magnets is in disorder, need not repack can the handling this device mechanism design is equitable, can save engineering time and manpower, is fit for using widely