| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a rotary roll having a shaft part which is hardly completely broken even if partial breakage such as a crack is produced therein and is excellent in durability, simply and at low cost. <P>SOLUTION: In the rotary roll 10 provided with a roll body 11, and a shaft part 12 inserted into at least one end of the roll body 11 and fixed to the roll body 11, the shaft part 12 includes an outer layer material 13, and a core material 14 disposed in the outer layer material 13 along the axial direction and made of a material larger in tensile strength than the outer layer material 13. <P>COPYRIGHT: (C)2012,JPO&INPIT |
