DETECTING MECHANISM FOR PHOTOSENSITIVE MATERIAL OF PHOTOSENSITIVE MATERIAL PROCESSING DEVICE

摘要

PROBLEM TO BE SOLVED: To make it possible to exactly detect a photosensitive material. SOLUTION: This mechanism 30 has a first outlet part transporting roller 9c formed with a hollow groove 24 facing a peripheral surface direction on its outer peripheral part, a ring member 16 engaging with the hollow groove 24 of the first outlet part transporting roller 9c, a second outlet part transporting roller 9d formed with the hollow groove 25 facing the peripheral surface direction on its outer peripheral part and an optical sensor 17 having a light projecting part and a light receiving part. The photosensitive material F is detected by detecting the displacement in the outer peripheral part of the ring member accompanying the turning of the ring member 16 by means of the optical sensor 17.