JP2017078739A5

JP2017078739A5 -

Info

Publication number: JP2017078739A5
Application number: JP2015205373A
Authority: JP
Filing date: 2015-10-19
Publication date: 2018-11-01
Anticipated expiration: 2035-10-19

Claims

A fixing rotator,
An opposing rotator provided to face the fixing rotator;
A rubbing rotator that rubs the surface of the fixing rotator to recover the surface property by rotating in contact with the fixing rotator; and
First driving means for rotationally driving the rubbing rotary body,
In a fixing device for fixing an unfixed image on a recording medium in a nip portion formed by the fixing rotating body and the counter rotating body,
The rubbing rotary body is disposed so as to be able to contact and separate from the fixing rotary body,
The counter rotator is arranged to press or depressurize the fixing rotator and to be able to contact and separate.
Before the recording medium is conveyed to the nip portion, the rubbing rotator rubs the fixing rotator,
While the rubbing rotator rubs the fixing rotator, the opposing rotator is separated from the fixing rotator,
After the rubbing of the fixing rotating body by the rubbing rotating body is completed, the counter rotating body is a fixing device that rotates by pressing the fixing rotating body for a predetermined time with a pressing force smaller than the pressing force at the time of fixing. There,
The fixing device according to claim 1, wherein the rubbing rotator changes a linear velocity when rubbing the fixing rotator according to a printing mode.

A fixing rotator,
An opposing rotator provided to face the fixing rotator;
A rubbing rotator that rubs the surface of the fixing rotator to recover the surface property by rotating in contact with the fixing rotator; and
First driving means for rotationally driving the rubbing rotary body,
In a fixing device for fixing an unfixed image on a recording medium in a nip portion formed by the fixing rotating body and the counter rotating body,
The rubbing rotary body is disposed so as to be able to contact and separate from the fixing rotary body,
The counter rotator is arranged to press or depressurize the fixing rotator and to be able to contact and separate.
Before the recording medium is conveyed to the nip portion, the rubbing rotator rubs the fixing rotator,
While the rubbing rotator rubs the fixing rotator, the opposing rotator reduces the pressing force to the fixing rotator without being separated from the fixing rotator,
After the rubbing of the fixing rotating body by the rubbing rotating body is completed, the counter rotating body is a fixing device that rotates by pressing the fixing rotating body for a predetermined time with a pressing force smaller than the pressing force at the time of fixing. There,
The fixing device according to claim 1, wherein the rubbing rotator changes a linear velocity when rubbing the fixing rotator according to a printing mode.

The rubbing rotator is separated from the fixing rotator while the counter rotator is rotated by pressing the fixing rotator for a predetermined time with a pressing force smaller than the pressing force at the time of fixing. The fixing device according to claim 1 or 2 .

The fixing device according to claim 1 , wherein the glossiness of the surface of the fixing rotating body is adjusted by controlling a linear velocity of the rubbing rotating body.

The fixing device according to claim 4 , wherein the linear velocity of the rubbing rotary member is controlled so that the glossiness of the surface of the fixing rotary member is 30% or less.

6. The fixing device according to claim 4 , wherein the linear velocity of the rubbing rotary member is controlled so that the glossiness of the surface of the fixing rotary member is 20% or less.

The fixing device according to claim 4 , wherein the linear velocity of the rubbing rotary member is controlled so that the glossiness of the surface of the fixing rotary member is 40% or more.

Second driving means for driving the fixing rotator,
The linear speed of the rubbing rotary body is changed by changing the rubbing rotary body between the rotational driving by the first driving means and the driven rotational driving driven by the driving of the fixing rotating body by the second driving means. The fixing device according to claim 1 , wherein the fixing device is changed.

9. The first driving means can rotate the rubbing rotary member at a linear velocity higher than the linear velocity of the fixing rotary member, according to claim 1. Fixing device.

Having glossiness detecting means for detecting the glossiness of the surface of the fixing rotator,
The fixing device according to claim 1 , wherein a linear velocity of the rubbing rotary body is controlled based on a detection result of the glossiness detection unit .

An image forming apparatus comprising the fixing device according to claim 1 .

At least one of the normal gloss mode and the high gloss mode having a higher gloss than the normal gloss mode can be selected.
The linear velocity of the rotatable rubbing member when the high gloss mode is selected, and wherein the higher than the linear velocity of the rotatable rubbing member when the normal gloss mode is selected, the claim 11 The image forming apparatus described.