Film scraping prevention turning plate mechanism for film stretcher

A film scraping prevention turning plate mechanism for a film stretcher comprises an upper turning plate assembly and a lower turning plate assembly which are arranged in parallel, a film penetrates through the space between the two turning plate assemblies, the turning plate mechanism further comprises a sliding supporting seat capable of transversely moving along a rack, the sliding supporting seat is rotationally connected with sliding plates of the two turning plate assemblies respectively, the sliding plates are sleeved with fixing plates, and the fixing plates are fixedly connected with the upper turning plate assembly and the lower turning plate assembly. The sliding plate and the fixed plate are connected to the rack through a rotating support. The two turning plate assemblies of the mechanism are kept balanced by adopting self weight or properly increased counter weight, and an extension spring or a torsion spring does not need to be added, so that the problem that the spring is easy to lose elastici