Patent ID: 8657728

Claim:
A transport roller adapted for transport of a recording medium in a printer device, wherein the transport roller comprises: a cylindrical shaft of which a pair of end surfaces are formed in a cylindrical shape by a press work forming a joining portion between the pair of end surfaces, wherein the joining portion includes: a central linear section which is provided on a center portion in an axis direction of the cylindrical shaft and is formed in a linear shape to be parallel to the axis direction of the cylindrical shaft; and a folded section which includes a plurality of intersections provided on at least one end of the center portion and disposed so as to extend in a direction perpendicular to the axis direction of the cylindrical shaft, each intersection having a proximal end and a distal end and each intersection extending between the pair of end surfaces, and connection linear section which connects the ends of adjacent pairs of the plurality of intersections, wherein the connection linear section is constituted by a first linear section which connects the distal ends of an adjacent pair of intersections and a second linear section which connects the proximal ends of another pair of intersections and formed shorter than the first linear section, and wherein a distance between the pair of end surfaces within the central linear section is longer than a distance between the pair of end surfaces within the second linear section.