paper separation mechanism

Abstract

The invention provides a paper separating mechanism capable of normally separating paper and ensuring the quality of reproduced images. The paper separation mechanism includes: a driving part, the driving part has a protrusion, and is driven to rotate by the motor; When the driving part is driven by the motor to rotate, the ratchet is pushed by the protrusion to slide and rotate axially; the separation roller shaft is integrally set with a separation roller for separating paper in the middle of the separation roller shaft. The shaft-side teeth meshed with the side teeth, and the other end of the ratchet is sleeved on the separation roller shaft. With the axial sliding of the ratchet, the shaft-side teeth and the ratchet-side teeth can be engaged or separated; One surface of the electrical member is disposed opposite to an outer peripheral surface of at least one member of the driving portion, the ratchet, and the separation roller in a non-contact manner.

Description

technical field [0001] The invention relates to a paper separation mechanism. Background technique [0002] In image forming devices or image reading devices of scanners, copiers, facsimile machines, printers, and compound machines composed of the above machines, in order to transfer images or read images, it is set to transfer the paper from the paper table one by one Paper separation mechanism for separating and conveying. In this paper separation mechanism, the paper is stretched due to the rapid paper feeding on the downstream side of the paper conveyance, and the rear end of the paper is impacted at the moment when it leaves the separation roller or other conveying rollers of the paper separation mechanism, which in turn causes image jitter , In order to prevent image defects caused by this paper feeding method, a one-way clutch or ratchet mechanism is often provided on the separation roller or other paper feeding rollers upstream of the image reading part. [0003] I...

AI Technical Summary

Problems solved by technology

[0004] However, in the separation mechanism that uses ratchets, there may be problems such as that the paper cannot be separated normally, or problems such as lines appearing in the reproduced image

The inventors of the present application have found through diligent research that static electricity will be generated due to friction during transportation, and the ratchet will sometimes move to the driving side and sometimes to the conveying roller side under the action of electrostatic force, and the ratchet will become unable to operate normally.

For example, when the ratchet is attracted to the driving side by electrostatic force, it cannot engage with the feed roller and transmit driving force to the feed roller, resulting in the above-mentioned problem that the paper cannot be separated normally

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