COVER MEMBER, METHOD FOR MANUFACTURING COVER MEMBER, IMAGE SENSOR UNIT, IMAGE READER, AND PAPER-SHEET KIND IDENTIFICATION DEVICE

PROBLEM TO BE SOLVED: To provide a cover member capable of improving the accuracy of parallelism in a main scan direction.SOLUTION: A cover member 40 includes a transmission member 55 formed along the main scan direction and being for transmitting light emitted from a light source part 20 and a frame member 41 holding the transmission member 55. The frame member 41 includes longitudinal frame parts 42a and 42b formed along the main scan direction and a projection part 48 projecting toward the outer peripheral surface 57 of the transmission member 55 from the inner walls 47 of the longitudinal frame parts 42a and 42b. The transmission member 55 and the frame member 41 are connected by an adhesive filled between the inner peripheral surface (vertical surface 48a) of the projection part 48 and the outer peripheral surface 57 of the transmission member 55, without coming into contact with each other. 【課題】主走査方向の平行度の精度を向上させることができるカバー部材を提供する。【解決手段】本発明のカバー部材４０は、主走査方向に沿って形成され光源部２０から出射される光が透過する透過部材５５と、透過部材５５を保持する枠部材４１とを有し、枠部材４１は、主走査方向に沿って形成される長手枠部４２ａ、４２ｂと、長手枠部４２ａ、４２ｂの内側壁４７から透過部材５５の外周面５７に向かって突出する突出部４８とを有し、透過部材５５と枠部材４１とは、互いに接触されずに突出部４８の内周面（鉛直面４８ａ）と透過部材５５の外周面５７との間に充填された接着剤で結合されていることを特徴とする。【選択図】図５Ｅ