Patent ID: 9664503
Date: 2017-05-30
CPC Classifications: B65H,G01B,G03G

Claim:
1. A side edge detection device with a multicolored light detection unit, comprising: a light emission unit including a plurality of light sources for a plurality of colors, respectively, a light source for each of the colors including a plurality of light-emitting elements being arranged in a width direction to a conveyance object and configured to emit line-like light of color which is long in the width direction to the conveyance object, the width direction being orthogonal to a conveyance direction of the conveyance object, the light sources for at least two of the colors simultaneously emitting light to the conveyance object; and a detection unit configured to detect a side edge in the width direction of the conveyance object based on signals output from light reception elements in the multicolored light detection unit, wherein the multicolored light detection unit includes a plurality of light reception elements, each configured to receive reflected light from the conveyance object, the reflected light including respective line-like light of the plurality of colors emitted from the plurality of light sources for the colors which simultaneously emit light to the conveyance object and output a signal corresponding to a received amount of light, the light reception elements being arranged in an array in the width direction.