Pneumatic pressurization winding self-stop device of roller

The utility model relates to a roller pneumatic-pressure winding automatic stop motion, the main structure of this device is that the stage of the cylinder body (1) is provided with a contact cover (3), a guide sleeve (6) is arranged in the holes of the cylinder body (1), and the cylinder body (1) is connected with a signal line; a contact ring (5) is sleeved on a piston rod (7), the contact ring (5) is blocked with a spring catch hoop (4), and the piston rod (7) is connected with another signal line; the structure leads to the result that the materials of the contact ring (5) and the spring catch hoop (4) are very ordinary, the manufacturing technique is simple, and the operation reliability is high; when the roller winds, the piston rod (7) drives the contact ring (5) and the spring catch hoop (4) move upward, and the signal line is put through and send the stopping signal when the contact ring (5) contacts with the contact cover (3), and the machine stops.