SIGNBOARD PICTURE FIXING DEVICE

PURPOSE:To easily make a fine adjustment when such defect occurs that wrinkles are formed on a stretched signboard picture film without requiring eyelet machining needing labor and cost by providing film stoppers, film fixing studs, and tension bolts. CONSTITUTION:Individual film stoppers 1 are temporarily fixed with individual tension bolts 3 on the outer peripheries of a planar light source. The peripheries of a signboard picture film are mounted on the stoppers 1 provided on the outer peripheries of the planar light source respectively. Holes are bored at the positions corresponding to the film fixing studs 2 protruded from the stoppers 1. The studs 2 are inserted into the holes, and the film is temporarily fixed with nuts. The appearance of the film is observed, and the presence of wrinkles and twists is checked. When there are defects, the protruding positions of the studs 2 and the fastening/ loosening of the bolts are adjusted, the tension of the film is controlled, and the defects on the appearance can be corrected.