Floating roller device of thin film production equipment

The utility model discloses a floating roller device of thin film production equipment. Two ends of a floating roller are respectively connected with a rotary arm in a rotatable mode, the middle portion of a left rotary arm and the middle portion of a right rotary arm are respectively hinged to a piston rod of an air cylinder, and cylinder barrels of the air cylinders are connected to a wall board. The two rotary arms are fixedly connected with a rotary rod, and two ends of the rotary rod are installed on the wall board in a rotatable mode. One end of the rotary rod is connected to a position detecting mechanism angle encoder, and an encoder signal line is connected with a winding drum transmission motor control mechanism. A thin film is wound around the lower portion of the floating roller downward from a front guiding roller, and then coiled onto the winding drum upward through the guidance of a rear guiding roller. Weight-balancing blocks are installed at the far ends, relative to the floating roller, of t