Rotating or pivoting apparatus and medium feeding apparatus
First Claim
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1. A rotating or pivoting apparatus comprising:
- an inner ring rotating or pivoting when power is transmitted thereto from a driving source;
an outer ring located outside the inner ring and rotating or pivoting when power is transmitted thereto from the inner ring, thereby transmitting power to a to-be-treated medium; and
sensing means provided between the inner ring and the outer ring for sensing vibration of the outer ring to thereby sense slippage between the outer ring and the to-be-treated medium.
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Abstract
A medium feeding apparatus comprises a driving motor for moving a backup plate to press a medium against a pickup roller, piezoelectric elements for sensing slippage between the pickup roller and the medium which occurs while the roller rotates, and a controller for driving the driving motor to thereby vary a force for pressing the medium against the pickup roller, when the sensing means has sensed slippage between the pickup roller and the medium.
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Citations
11 Claims
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1. A rotating or pivoting apparatus comprising:
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an inner ring rotating or pivoting when power is transmitted thereto from a driving source;
an outer ring located outside the inner ring and rotating or pivoting when power is transmitted thereto from the inner ring, thereby transmitting power to a to-be-treated medium; and
sensing means provided between the inner ring and the outer ring for sensing vibration of the outer ring to thereby sense slippage between the outer ring and the to-be-treated medium. - View Dependent Claims (2, 3, 4, 5)
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6. A medium feeding apparatus comprising:
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mounting means for mounting thereon a medium in a stacked manner;
a pickup roller for picking up each of the medium while it rotates or pivots;
a driving source for driving the pickup roller; and
driving means for moving the mounting means to press the medium against the pickup roller;
sensing means provided in the pickup roller for sensing a change in fine acceleration of the pickup roller to thereby sense slippage between the pickup roller and the medium; and
control means for executing control so as to drive the driving means to thereby vary a force for pressing the medium against the pickup roller, when the sensing means has sensed slippage between the pickup roller and the medium. - View Dependent Claims (7, 8)
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9. A medium feeding apparatus comprising:
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mounting means for mounting thereon a medium in a stacked manner;
a pickup roller for picking up each of the medium while it rotates or pivots;
a driving source for driving the pickup roller; and
driving means for moving the mounting means to press the medium against the pickup roller;
sensing means provided in the pickup roller for sensing a change in fine acceleration of the pickup roller to thereby sense slippage between the pickup roller and the medium; and
control means for executing control so as to drive the driving means to thereby vary a force for pressing the medium against the pickup roller, when the sensing means has sensed slippage between the pickup roller and the medium, wherein the pickup roller includes;
an inner ring rotating or pivoting when power is transmitted thereto from the driving source; and
an outer ring located outside the inner ring and rotating or pivoting when power is transmitted thereto from the inner ring, thereby transmitting power to the medium, and the sensing means is provided between the inner ring and the outer ring for sensing a change in fine acceleration of the outer ring to thereby sense slippage between the outer ring and the medium. - View Dependent Claims (10, 11)
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Specification