Crossing frame with air bags for stringing construction

The invention provides a spanning frame for stringing construction. The spanning frame comprises a spanning frame cross beam and an air bag buffer device fixed above the spanning frame cross beam. The air bag buffering device comprises a hopper groove, an air bag and a bearing plate. The air bag is filled with air, the bottom of the air bag is fixed in the hopper groove, and the bearing plate is fixed to the top of the air bag. The bearing plate bears upper impact and transmits the upper impact to the air bag so that the air bag can deform and make contact with the side wall of the bucket groove. The air bag is made of natural rubber. The bucket groove is of an inverted trapezoidal structure. And the side wall of the inverted trapezoidal structure and the cross section of the bearing plate comprise an aluminum triangular hollow structure formed by buckling C and D. By arranging the air bag and the air bag buffer device, the speed of the lead after impacting the crossing frame is greatly reduced, the acting ti