| 摘要 |
PROBLEM TO BE SOLVED: To inexpensively manufacture a paper feeding roller with a large diameter and high shape and dimension stabilities by connecting and integrating a rotary shaft and a plurality of cylindrical roller parts constituted by pressurizing and molding a mixture made of hydraulic composition and curing and hardening the mixture in an axial direction and inserting the rotary shaft into these roller parts. SOLUTION: By pressurizing and molding a mixture made of hydraulic composition, forming cylindrical molded bodies 1 to 3 by curing and hardening the mixture, inserting a rotary shaft 4 into an object that these molded bodies 1 to 3 are connected on co-axial line and integrally connecting the cylindrical molded bodies 1 to 3 one another by using proper adhesive, a paper feeding roller is formed. At this time, the cylindrical molded body 1 is formed by providing a cylindrical recessed part and a cylindrical projecting part on a right side inner peripheral surface and at a left side tip part, respectively. The cylindrical molded body 2 and the cylindrical molded body 3 are formed by providing a cylindrical projecting part at a left side tip part and a cylindrical recessed part on a right side inner peripheral surface, respectively. By tightly fitting corresponding recessed parts and projecting parts, the paper feeding roller excellent in concentric circle property is obtained.
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