| 摘要 |
PURPOSE:To restrain the flexural quantity of a sleeve to <=0.2mm. even if a permanent magnet longer than 500mm. is used, by providing a projecting part on a part of the outside circumferential face of the cylindrical sleeve consisting of a nonmagnetic material where a permanent magnet member provided with plural magnetic poles on the surface is stored. CONSTITUTION:A permanent magnet roll 1 is constituted by arranging a permanent magnet member 3 in a cylindrical sleeve 2 consisting of a nonmagnetic material. The permanent magnet member 3 is formed by fixing a cylindrical permanent magnet 4, which has plural magnetic poles on the surface, to a shaft 5. Contracted parts 5a and 5b of the shaft 5 are supported through bearings 6 and 6' by flange members 7 and 7'. A projecting part 6 extending in the axial direction is formed on a part of the circumferential face of the sleeve 2, and thus, the flexural quantity of the sleeve 2 is restrained to <=0.2mm. even if the length of the permanent magnet member 3 is longer than 500mm.. |
