The invention relates to the technical field of paper feeding
air door structures of printing machines, in particular to a paper feeding
air door structure of a printing
machine, which comprises a
front edge adsorption box, an upper plate, a
servo motor, a cavity, a rotating rod and a sun gear, the upper end of the
front edge adsorption box is fixedly connected with the upper plate, and the side wall of the
front edge adsorption box is fixedly connected with the
servo motor; a cavity is formed in the upper plate, the output end of the
servo motor is fixedly connected with a rotating rod, the surface of the rotating rod is fixedly connected with a sun wheel, a front edge adsorption adjusting structure is arranged at the front end of the front edge adsorption box, a split structure is arranged in the front edge adsorption box, and a disassembly and
assembly structure is arranged at the bottom end of the front edge adsorption box. According to the paper feeding
air door structure of the printing
machine, opening and closing of the air feeding door in front of the front edge adsorption box can be controlled, the size of the air feeding door is adjusted, the adsorption space is changed, the most suitable opening and closing size is achieved, the adsorption strength of the two sides of a
paperboard is guaranteed, and the practicability and the
adsorption effect of the device are improved.