Film tension automatic regulating apparatus and contain its air cushioning machine

The utility model discloses a film tension automatic regulating apparatus and contain its air cushioning machine, operation along with the system, the radius of rolling up the membrane reduces gradually, under the condition of same frictional force, the tension grow of membrane, it becomes slow to put membrane speed, the upswing of swinging arms right -hand member, left end downward swinging, the decrement of pressure spring reduces, frictional force between friction cylinder and friction disk reduces, the drum rotation speed increase, put the increase of membrane speed, tension at the membrane of depression bar department diminishes, reach balanced state, when the tension of membrane diminishes, the right -hand member downward swinging of swinging arms, the left end upswing, the decrement increase of pressure spring, friction cylinder increases with the frictional force of friction disk, drum rotation speed reduces, it becomes slow to put membrane speed, at the tension of the membrane of depression bar depar