Feed mechanism of film leader in processing rack for film automatic developing system

摘要

The present invention relates to a sprocket which is driven and rotated from the outside, a means for transferring the film leader along a constant path by rotation of the sprocket, and a film processing rack for the film automatic developing apparatus driven by means for guiding and supporting the film leader transfer means Wherein the film leader (25) conveying means is a chain (24) in a leader conveying mechanism. The chain 24 is composed of a plurality of unit pieces 40 and a plurality of pins 48. The unit pieces 40 include two plate inner parts 42 extending in parallel to each other, Two plate-like outer side portions 41 that are spaced apart from the inner side portions 42 by a distance larger than the distance between the inner side portions 42 and extend parallel to the inner side portion 42, A protrusion 46 is formed in the center of the upper surface of the connecting portion 47 and openings 44 are formed in the inner side portions 42 so as to vertically penetrate both inner side portions, The openings 44 and 45 have the same diameter as the outer diameter of the pin 48 and the inner side portion 42 of one unit body is formed in the adjacent unit body 41. [ And a pin (48) is inserted into the openings (44, 45).