Patent ID: 8899511

Claim:
A roll medium support device comprising: a shaft member including an insertion part having a rectangular shape in cross section taken along a plane perpendicular to a longitudinal axis of the shaft member, the insertion part being configured to be inserted through a center hole of a roll medium, the rectangular shape being defined by a pair of long sides and a pair of short sides that are shorter than the long sides; a support member having a rectangular first insertion hole through which the insertion part is inserted along an insertion direction so that the support member supports the roll medium from a width direction of the roll medium, a rectangular shape of the first insertion hole being defined on a plane perpendicular to the insertion direction by a pair of first long sides and a pair of first short sides that are shorter than the first long sides; a rotating member rotatably provided to the support member and having a rectangular second insertion hole through which the insertion part is inserted along the insertion direction, a rectangular shape of the second insertion hole being defined on a plane perpendicular to the insertion direction by a pair of second long sides and a pair of second short sides that are shorter than the second long sides; a pair of interlocking members extending along the second long sides of the second insertion hole in the rotating member, a distance between the interlocking members being shorter than a distance between short-side surfaces of the insertion part and longer than a distance between long-side surfaces of the insertion part; and an urging member urging the interlocking members towards each other.