| 摘要 |
PROBLEM TO BE SOLVED: To enable a smooth motion of an energizing means having less influence of friction against disc blades and a holder in a blade assembly to be used in a device for cutting an object to be cut between the two disc blades. SOLUTION: This blade assembly includes the disc blades 15, the holder 303 having a holder other projecting surface projecting in a direction away from a shaft and rotating with the shaft as a center, and the energizing means 341 fitted into a recessed groove 381 formed by blade other surfaces of the disc blades 15 and the holder other projecting surface. The width of the recessed groove 381 becomes a monotone function according to an increase of a distance from the shaft. The energizing means 341 abuts on both of the blade other surface and the holder other projecting surface in the monotone function part of the recessed groove 381 and energizes to expand a space between both of the surfaces, and thereby energizning the disc blades 15 toward one side of an axial direction in relation to the holder 303. Of a coefficient of static friction between a blade abutting surface and the energizing means and a coefficient of static friction between a holder abutting surface and the energizing means, a ratio (FH/FL) of either one larger coefficient FH of static friction to either one smaller coefficient FL of static friction is≥1.3. COPYRIGHT: (C)2011,JPO&INPIT |
