Runner shrinking device of film uncovering machine

The utility model relates to the technical field of agricultural mechanical equipment. The utility model relates to a film uncovering machine, in particular to a runner shrinking device. Compared withthe prior art, the rotating wheel retracting device of the film uncovering machine comprises a rotating shaft, a rotating wheel, a hub sleeve, a roller plate and a lever, the thin film is wound through a roller composed of roller plates; two ends of the roller plate can swing left and right through a lever; when the roller plate swings towards the left side; the left side of the roller plate deviates inwards, so that the roller formed by the roller plate is shrunk on the left side and enlarged on the right side, the roller formed by the roller plate can form a shape with a large end and a small end through the levers at the two ends, a film wound on the roller plate can be taken out conveniently, and the advantages of high film uncovering speed, high use efficiency and good use effect areachieved. 本实用新型涉及农业机械设备技术