Support shaft for winding/unwinding sheets
OwnerHiroshi Kataokainventor
Life of this patent
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Abstract
A support shaft for winding/unwinding sheets comprises a ring with the outer periphery thereof formed with a plurality of inclined grooves circumferentially spaced apart and with the bottoms of the inclined grooves inclined in the circumferential direction, rollers accommodated in respective inclined grooves for rolling in the longitudinal direction thereof to progressively increase the extent of projection therefrom with rotation of the ring, and an outer ring with a gap surrounding the ring with rollers.
Claims10
A support shaft for friction winding/unwinding sheets, said support shaft comprising:
- (a) a drive shaft;
- (b) a plurality of rings juxtaposedly and rotatably fitted on said drive shaft, each one of said plurality of rings having the upper periphery thereof formed with a plurality of circumferentially inclined grooves circumferentially spaced apart, each one of said inclined grooves having an inclined bottom;
- (c) torque transmitting means for transmitting torque from said drive shaft to each one of said plurality of rings;
- (d) rollers accommodated in said inclined grooves for rolling therein from a deep portion thereof toward a shallow portion thereof to progressively increase the extent of projection therefrom with a rotation of said plurality of rings;
- (e) space holding means provided near said plurality of rings for holding said rollers spaced apart in the circumferential direction of said plurality of rings in engagement of said rollers during rolling thereof;
- and
- (f) a plurality of outer rings, each one of said plurality of outer rings having a gap and at least one flange projecting therefrom radially inwardly along an end face of a corresponding one of said rollers, each one of said plurality of outer rings being fitted on a corresponding one of said plurality of rings to surround the outer surfaces of the associated ones of said rollers and being capable of being expanded by the urging force of said rollers.
In a shaft for winding/unwinding sheets, in which a drive shaft has the outer periphery thereof formed with a plurality of circumferentially inclined grooves circumferentially spaced apart and having an inclined bottom and rollers are accommodated in respective ones of said inclined grooves for rolling therein from a deep portion toward a shallow portion thereof to progressively increase the extent of projection thereof with a rotation of said shaft, thereby effecting the winding/unwinding of sheets, an improvement of said shaft wherein the outer surface of said rollers are surrounded by an outer ring having a gap and also having radially inwardly projecting flanges provided on opposite end faces of each one of said rollers.
Dependencies are inferred from the claim text.