| 摘要 |
PROBLEM TO BE SOLVED: To provide a roller in which temperature distribution in the shaft line direction of a roller is uniform, by which a time till the roller obtains a specified temperature is short, which is light in weight, and whose mechanical strength is high. SOLUTION: This roller R3 is constituted by integrally molding a cylindrical part 3 forming a carrying surface, a middle shaft part 2 positioned on the center of the circle of the part 3 and extending in the longitudinal direction of the part 3, and plural rib parts 4 connecting the parts 2 and 3 in the longitudinal direction; and provided with a roller body 1 in which a hollow chamber 5 formed of the parts 2, 3, and 4 is opened outside, and a roller shaft 6 fixed on both ends of the part 2.
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