Layering device in carton unpacking machine

The invention discloses a layering device in a carton unpacking machine. The layering device comprises a bottom supporting frame. A pair of inserting-separating mechanisms are arranged on a machine frame. Each inserting-separating mechanism comprises a sliding base which can slide up and down on the machine frame, at least two guiding through holes are longitudinally formed in each sliding base at intervals, and the outer end of an inserting rod in each guiding through hole is connected with a driving mechanism. All the inserting rods are equal in height. The pair of driving mechanisms can drive the inserting rods on the two sides respectively to be inserted between two adjacent cartons, and then can drive the sliding bases on the two sides respectively to slide upwards at the same time, and therefore the cartons on the inserting rods and cartons located at the positions, below the inserting rods, on the bottom supporting frame are vertically layered. The pair of driving mechanisms can further drive the sliding bases on the two sides respectively to be restored to initial positions and then drive the inserting rods on the two sides to be restored to initial positions, and therefore the cartons on the inserting rods fall on the bottom supporting frame. By means of the layering device, it can be guaranteed that a vacuum suction cup in the carton unpacking machine smoothly and efficiently works.