Tightly wrapping mechanism of full automatic paper tube winding machine

The utility model discloses a tightly wrapping mechanism of a full automatic paper tube winding machine. During winding, a bottom roller as well as front and back tightly-wrapping rollers are pushed to simultaneously rise as a whole so as to mutually wrapping a tube winding rod in a tight way. Before a tube is cut, the front and back tightly-wrapping rollers are pulled by a small cylinder to slightly descend so as to avoid the position of a cutting knife; however, the tube winding rod is still tightly wrapped by the front and back tightly-wrapping rollers. After the tube is cut, the whole tightly wrapping mechanism is driven by the big cylinder to return, so that convenience for unwinding the tube is achieved. The tightly wrapping mechanism of the full automatic paper tube winding machine, disclosed by the utility model, has the advantages of accurate and stable working, good equipment durability as well as simplicity and easiness in operation, debugging and maintenance; and production cost of a production en