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A roller assembly for use as a back-up roller for work rolls. The roller assembly comprises an axle, a roller rotatably mounted on the axle, a plurality of bearing elements rotatably positioned between the axle and roller, at least one bushing which is eccentric relative to the axle and which is fix

A roller assembly for use as a back-up roller for work rolls. The roller assembly comprises an axle, a roller rotatably mounted on the axle, a plurality of bearing elements rotatably positioned between the axle and roller, at least one bushing which is eccentric relative to the axle and which is fixedly mounted on the axle by a dowel which passes through holes in the axle and eccentric bushing, and a housing for the bushing. The eccentric bushing is rotatable for translating the roller in a radial direction thereof. In order to rotate the bushing in one of opposite circumferential directions, force is applied to a respective one of a pair of terminal ends of grooving, preferably a single groove, which extends circumferentially in a radially outer surface of the eccentric bushing and which is adapted to allow unimpeded movement of adjustment screws in apertures in the housing to adjustably engage the grooving terminal ends thereby to maximize roller translation effected by the apertures and screws and positions of the terminal ends. The eccentric bushing passages (and/or the axle passages) through which the dowel passes are oblong to allow each bushing to independently move circumferentially relative to the other bushing within the limits of the oblong passages, to enable compensation for slight misalignment between the work roll and the back-up roller for the purpose of achieving near perfect contact.

대표청구항 ▼

1. A roller assembly comprising an axle, a roller rotatably mounted on said axle, at least one bushing which is eccentric relative to said axle and which is mounted on said axle to effect rotation of said axle by rotation of said bushing, at least one means for rotating said bushing in opposite circ

1. A roller assembly comprising an axle, a roller rotatably mounted on said axle, at least one bushing which is eccentric relative to said axle and which is mounted on said axle to effect rotation of said axle by rotation of said bushing, at least one means for rotating said bushing in opposite circumferential directions respectively for translating said roller in a radial direction of said roller, said at least one rotating means comprising a single circumferentially extending groove which is located in a radially outer surface of said bushing and which has a pair of terminal ends adapted for application of force against each of said terminal ends for rotating said bushing in opposite circumferential directions respectively. 2. A roller assembly according to claim 1 wherein said bushing is mounted on said axle to effect play circumferentially between said bushing and said axle. 3. A roller assembly according to claim 2 further comprising passages in said bushing and said axle and a dowel receivable in said passages for mounting said bushing on said axle, and at least one of said passages sized to allow play circumferentially between said bushing and said axle. 4. A roller assembly according to claim 3 wherein each of said passages of said bushing has a width in a direction circumferentially of said bushing which is greater than a diameter of said dowel to allow relative movement circumferentially of said bushing between said bushing and said dowel. 5. A roller assembly according to claim 1 further comprising a housing member in which said bushing is rotatably received, said at least one rotating means further comprising a pair of threaded apertures in said housing member, and screws in said threaded apertures respectively in position for engaging and applying force to said terminal ends respectively for rotating said bushing. 6. A roller assembly comprising an axle, a roller rotatably mounted on said axle, at least one bushing which is eccentric relative to said axle and which is mounted on said axle to effect rotation of said axle by rotation of said bushing, at least one single circumferentially extending groove which single groove is located in a radially outer surface of said bushing and which has a pair of terminal ends adapted for application of force against each of said terminal ends for rotating said bushing in opposite circumferential directions respectively for translating said roller in a radial direction of said roller. 7. A roller assembly according to claim 6 wherein said bushing is mounted on said axle to effect play circumferentially between said bushing and said axle. 8. A roller assembly comprising an axle, a roller rotatably mounted on said axle, at least one bushing which is eccentric relative to said axle and which is mounted on said axle to effect rotation of said axle by rotation of said bushing, circumferentially extending grooving located in a radially outer surface of said bushing and which has a pair of terminal ends which are adapted for application of force against each of said terminal ends for rotating said bushing in opposite circumferential directions respectively for translating said roller in a radial direction of said roller, a housing member in which said bushing is rotatably received, a pair of threaded apertures in said housing member, and screws in said threaded apertures respectively in position for engaging and applying force to said terminal ends respectively for rotating said bushing, wherein said grooving is adapted to allow unimpeded movement of said screws in said apertures thereby to maximize roller translation effected by the apertures and screws and positions of the terminal ends. 9. A roller assembly according to claim 8 wherein said bushing is mounted on said axle to effect play circumferentially between said bushing and said axle. 10. A roller assembly comprising an axle, a roller rotatably mounted on said axle, at least two axially spaced bushings which are eccentric rel ative to said axle, said bushings mounted on said axle to effect rotation of said axle by rotation of said bushings and to effect play circumferentially between at least one of said bushings and said axle, each said bushing being rotatable for translating said roller in a radial direction of said roller. 11. A roller assembly according to claim 10 further comprising at least one single circumferentially extending groove for effecting rotation of at least one of said bushings in opposite circumferential directions respectively, said single groove located in a radially outer surface of said at least one bushing and having terminal ends adapted for application of force against each of said terminal ends for rotating said at least one bushing in opposite circumferential directions respectively. 12. A roller assembly according to claim 10 comprising circumferentially extending grooving located in a radially outer surface of said at least one bushing and which has a pair of terminal ends which are adapted for application of force against each of said terminal ends for rotating said at least one bushing in opposite circumferential directions respectively for translating said roller in a radial direction of said roller. 13. A roller assembly according to claim 12 further comprising a housing member in which said at least one bushing is rotatably received, a pair of threaded apertures in said housing member, and screws in said threaded apertures respectively in position for engaging and applying force to said terminal ends respectively for rotating said at least one bushing, wherein said grooving is adapted to allow unimpeded movement of said screws in said apertures thereby to maximize roller translation effected by the apertures and screws and positions of the terminal ends. 14. A roller assembly according to claim 10 comprising passages in said at least one bushing and said axle and a dowel receivable in said passages for mounting said at least one bushing on said axle, and at least one of said passages sized to effect play circumferentially between said at least one bushing and said axle. 15. A roller assembly according to claim 14 wherein each of said passages of said at least one bushing has a width in a direction circumferentially of said at least one bushing which is greater than a diameter of said dowel to allow relative movement circumferentially of said at least one bushing between said at least one bushing and said dowel. 16. A roller assembly according to claim 15 wherein each of said at least one bushing passages has a dimension axially of said at least one bushing which is substantially equal to the diameter of said dowel. 17. A roller assembly comprising an axle having a first portion and at least one second portion, a roller rotatably mounted on said first portion of said axle, a bushing which is mounted to said at least one second portion of said axle so that said axle rotates as said bushing is rotated, said at least one second portion of said axle being eccentric relative to said first portion of said axle whereby to effect translation of said first portion of said roller radially when said second portion of said axle is rotated, and said bushing being rotatable for rotating said at least one second portion of said axle thereby translating said first portion of said roller in a radial direction of said roller. 18. A roller assembly according to claim 17 further comprising circumferentially extending grooving located in a radially outer surface of said bushing and which has a pair of terminal ends which are adapted for application of force against each of said terminal ends for rotating said bushing in opposite circumferential directions respectively for translating said first portion of said roller in a radial direction of said roller. 19. A roller assembly according to claim 18 wherein said grooving comprises a single circumferentially extending groove which has both of said pair of terminal ends. 20. A roller asse mbly according to claim 19 further comprising an other bushing which is eccentric relative to said axle and which is mounted to an other second portion of said axle so that said axle rotates as said other bushing is rotated, said bushings mounted on said axle to effect rotation of said axle by rotation of said bushings and to effect play circumferentially between at least one of said bushings and said axle, each of the bushings being rotatable for translating said roller in a radial direction of said roller. 21. A roller assembly according to claim 18 further comprising a housing member in which said bushing is rotatably received, a pair of threaded apertures in said housing member, and screws in said threaded apertures respectively in position for engaging and applying force to said terminal ends respectively for rotating said bushing, wherein said grooving is adapted to allow unimpeded movement of said screws in said apertures thereby to maximize roller translation effected by the apertures and screws and positions of the terminal ends. 22. A roller assembly according to claim 21 further comprising an other bushing which is eccentric relative to said axle and which is mounted to an other second portion of said axle so that said axle rotates as said other bushing is rotated, said bushings mounted on said axle to effect rotation of said axle by rotation of said bushings and to effect play circumferentially between at least one of said bushings and said axle, each of the bushings being rotatable for translating said roller in a radial direction of said roller. 23. A roller assembly according to claim 17 further comprising an other bushing which is eccentric relative to said axle and which is mounted to an other second portion of said axle so that said axle rotates as said other bushing is rotated, said bushings mounted on said axle to effect rotation of said axle by rotation of said bushings and to effect play circumferentially between at least one of said bushings and said axle, each of the bushings being rotatable for translating said roller in a radial direction of said roller.