JP2003122172A - Fixing device and image forming device having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a recording medium passed through a nip part from wrapping around a fixing belt while adhering to the fixing belt, in a fixing device that passes a recording medium having a toner image held thereon through a nip part between the fixing belt and the pressure roller and fixes the toner image onto the recording medium by the application of heat and pressure during the passage of the recording medium. SOLUTION: A separating rotational body 22, rotated in the same direction as that of the fixing belt 12, is disposed opposite to the fixing belt 12. When the recording medium P passed through the part nip N adheres to the fixing belt 12, the recording medium P is separated from the surface of the fixing belt 12 by the rotating body 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention allows a recording medium to pass through a nip portion between a pair of fixing members, and heat and pressure are applied to the toner of the toner image to fix the toner image on the recording medium. The present invention relates to a fixing device and an image forming apparatus having the fixing device.

[0002]

2. Description of the Related Art Electronic copying machines, facsimiles, printers,
Alternatively, it is well known in the prior art to employ the fixing device of the above type in an image forming apparatus configured as a multi-function peripheral having at least these two functions. In this type of fixing device, since the toner of the toner image is heated when the toner image passes through the nip portion, the toner acts as an adhesive and the recording medium exiting the nip portion is a fixing member of any one of the fixing members. There is a risk that the recording medium will not be separated from the surface of the recording medium and will be wrapped around while being attached to the surface of the recording medium, causing the recording medium to jam.

Therefore, conventionally, a plurality of separation claws are brought into contact with the surface of the fixing member, or the tips of the separation claws are arranged slightly apart from the surface of the fixing member, and the recording is carried out from the nip portion by the separation claws. The medium is separated from the surface of the fixing member to prevent the recording medium from winding around the surface of the fixing member. However, when such a separating claw is used, the toner may adhere to the tip of the separating claw, and the adhered toner may cause the tip of the separating claw to float from the surface of the fixing member. In this case, a large gap is formed between the tip of the separation claw and the surface of the fixing member, and the recording medium may sneak into it, which may cause the recording medium to jam.

[0004]

SUMMARY OF THE INVENTION It is a first object of the present invention to provide a fixing device of the type described at the beginning which can effectively prevent the recording medium from winding around the fixing member. A second object is to provide an image forming apparatus having the above.

[0005]

SUMMARY OF THE INVENTION In order to achieve the first object of the present invention, in a fixing device of the type described at the beginning, a recording which is attached to the fixing member facing at least one fixing member. A separation rotating body for separating the medium is provided, and at the facing portion of the separation rotating body and the fixing member facing the separation rotating body,
A fixing device is proposed in which the surface of the separating rotary member is rotationally driven in a direction in which the surface of the separating rotary member moves in a direction opposite to the moving direction of the surface of the fixing member (claim 1).

In this case, it is advantageous if a gap of 0.1 mm to 1 mm is provided between the separating rotary member and the fixing member facing each other (claim 2).

Further, in the fixing device according to claim 1 or 2, when the outermost linear velocity of the separating rotary member and the surface linear velocity of the fixing member facing the outermost linear velocity are set to be substantially equal to each other. Advantageous (Claim 3).

Further, in the fixing device according to any one of claims 1 to 3, it is advantageous that the surface of the separating rotary member is provided with irregularities (claim 4).

Further, in the fixing device according to any one of claims 1 to 4, it is advantageous that the separating rotary member is a roller (claim 5).

Further, the present invention proposes an image forming apparatus comprising the fixing device according to any one of claims 1 to 5 in order to achieve the second object (claim 6).

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a partial sectional schematic view showing a part of a color printer which is an example of an image forming apparatus. The image forming apparatus shown here has an image forming means 1 for forming a toner image on a recording medium, and a fixing device 2 for fixing the toner image on the recording medium. First, the outline of the image forming means 1 will be clarified.

The image forming means 1 shown in FIG. 1 includes first to fourth image carriers 3Y and 3 which are configured as drum-shaped photoconductors.
M, 3C, and 3BK, and a yellow toner image, a magenta toner image, a cyan toner image, and a black toner image are formed on the respective image carriers. A transfer belt 4 is arranged so as to face the first to fourth image carriers 3Y to 3BK, and the transfer belt 4 includes a driving roller 5 and a driven roller 6.
It is wound around and driven to travel in the direction of arrow A.

First to fourth image carriers 3Y, 3M, 3
Since the structure for forming a toner image on C and 3BK is substantially the same as the structure for forming a toner image, only the structure for forming a toner image on the first image carrier 3Y will be described. This image carrier 3
Y is rotationally driven in the clockwise direction in FIG. 1, and at this time, the charging roller 7 uniformly charges the image carrier to a predetermined polarity. Then, the light-modulated laser beam L emitted from the laser writing unit 8 is applied to the charged surface. As a result, an electrostatic latent image is formed on the image carrier 3Y, and the electrostatic latent image is visualized by the developing device 9 as a yellow toner image.

On the other hand, a recording medium P made of, for example, transfer paper, a resin sheet, a resin film, or the like is fed from a paper feeding unit (not shown), and the recording medium P is, as indicated by an arrow B, an image carrier. It is fed between 3Y and the transfer belt 4,
The transfer belt 4 is carried and conveyed. A transfer roller 10 is disposed at a position substantially opposite to the image carrier 3Y with the transfer belt 4 interposed therebetween, and a voltage having a polarity opposite to the charging polarity of the toner on the image carrier 3Y is applied to the transfer roller 10. As a result, the yellow toner image on the image carrier 3Y is transferred onto the recording medium P. Not transferred to the recording medium P,
The transfer residual toner left on the image carrier 3Y is removed by the cleaning device 11.

In exactly the same manner, a magenta toner image, a cyan toner image and a black toner image are formed on the second to fourth image bearing members 3M, 3C and 3BK, respectively, and these toner images become yellow toner images. The transferred recording medium P is sequentially superposed and transferred.

The recording medium P carrying the unfixed toner images of four colors as described above has the fixing device 2 as indicated by the arrow C.
And the toner image is fixed on the recording medium P at this time. The recording medium that has passed through the fixing device 2 is conveyed in the direction of arrow D and discharged onto a paper discharge tray (not shown).

FIG. 2 is an enlarged cross-sectional view of the fixing device 2 shown in FIG. 1. The fixing device 2 shown in FIG.
And a fixing member configured as the pressure roller 13. The fixing belt 12 is wound around the supporting roller 14 and the heating roller 15, and the pressure roller 13 is in pressure contact with the supporting roller 14 via the fixing belt 12. In addition, the fixing belt 12 is pressed by the tension roller 18, so that the fixing belt 12 is pressed.
The tension has been adjusted to the proper size. Each of the rollers 13, 14, 15 and 18 rotates in the direction of the arrow, so that the supporting roller 14 and the heating roller 1 are rotated.
The fixing belt 12 stretched around 5 is rotationally driven in the direction of arrow F.

Heaters 16 and 17 are provided inside the heating roller 15 and the pressure roller 13, respectively, so that the heating roller 15, the fixing belt 12 and the pressure roller 13 are heated. Thermistors 19 and 20 are in contact with the surfaces of the fixing belt 12 and the pressure roller 13, respectively, and the thermistors 19 and 20 detect the temperatures of the surface of the fixing belt 12 and the pressure roller 13, respectively. The heaters 16 and 17 are on / off controlled based on the detection result, and the surface temperatures of the fixing belt 12 and the pressure roller 13 are maintained in a temperature range suitable for fixing the toner image.

As shown in FIG. 2, the unfixed toner image T
The recording medium P carrying (not shown in FIGS. 3 and 4) is
As described above with reference to FIG. 1, the nip portion between the fixing member including the fixing belt 12 and the fixing member including the fixing roller 12 is fed into the fixing device 2 as indicated by an arrow C.
After passing through N, heat and pressure are applied to the toner of the toner image to melt the toner, so that the toner image is fixed on the recording medium P. As shown in FIGS. 3 and 4, the recording medium P that has passed through the nip portion N is further conveyed to reach the exit roller pair 21, and is discharged to the outside of the fixing device by the rotation of the exit roller pair.

As described above, the fixing device causes the recording medium to pass through the nip portion between the pair of fixing members, and heat and pressure are applied to the toner of the toner image to fix the toner image on the recording medium. Is configured to. The fixing device 2 shown in FIGS. 2 to 4 is configured so that the recording medium P carrying the toner image T to be fixed is passed through the nip portion.

In an image forming apparatus for forming a full-color image, such as the image forming apparatus shown in FIG. 1, a plurality of toner images are superposed and transferred onto the recording medium P, and the toner images are transferred by the fixing device 2. Although it is configured to be fixed, it is preferable that the outer peripheral surface of the support roller 14 is made of a soft material in order to reliably fix such a toner image and obtain a high quality image. Therefore, in the fixing device 2 shown in FIGS. 2 to 4, the support roller 14 includes the cylindrical core metal 14A and the elastic layer 14B fixed to the outer peripheral surface thereof.
It is composed by. The elastic layer 14B is made of, for example, silicone rubber having a thickness of several mm.

By the way, as described above, when the toner image T carried on the recording medium P passes through the nip portion N,
Since the toner of the toner image is heated and melted, the toner acts as an adhesive and the recording medium P may wind up without being separated from the surface of the fixing belt 12.

Therefore, in the fixing device 2 of the present embodiment, a separating rotary member 22 is provided facing the fixing belt 12 which is an example of a fixing member and separating the recording medium P attached to the fixing belt 12. . This separating rotary body 22 has a shaft 23
The shaft 23 is rotatably supported,
At the facing portion between the separation rotator 22 and the fixing belt 12, the separation rotator 22 is driven in a direction in which the surface of the separation rotator 22 moves in the direction opposite to the moving direction of the surface of the fixing belt 12. It is configured to be rotationally driven by the device. The fixing belt 12 shown in FIGS. 2 to 4 rotates in the clockwise direction, and the separating rotary body 22 is also driven to rotate in the same clockwise direction, so that the fixing member composed of the fixing belt 12 and the separating rotary body 22 rotate in the same direction. It is configured to do.

The number of the separating rotary members 22 can be set appropriately,
As shown in FIG. 5, it is preferable to use a plurality of separation rotating bodies 22 arranged in the axial direction of the support roller 14. In the fixing device of this example, the plurality of separation rotary members 22 have a common shaft 23.
The shaft 23 is configured to be rotationally driven.

As shown in FIG. 3, even if the recording medium P exiting the nip portion N adheres to the surface of the fixing belt 12, the leading end of the recording medium P is separated from the rotating body 22 and the fixing belt 12. When it reaches the portion facing the or the vicinity thereof, the recording medium P is peeled from the surface of the fixing belt 12 by the separating rotary body 22 rotating in the above-mentioned direction, and the recording medium P is removed from the surface of the fixing belt 12. It is conveyed in a direction away from it, reaches the exit roller pair 21 as shown in FIG. 4, and is discharged to the outside of the fixing device by the exit roller pair 21. In this way, the trouble that the recording medium P winds around the surface of the fixing belt 12 and causes a jam is prevented. By providing a plurality of separation rotating bodies 22 as shown in FIG.
The recording medium P of any width size can be separated from the fixing belt 12.

When the separation claw is arranged to face the fixing belt and the recording medium adhered to the fixing belt is peeled off as in the conventional case, the toner on the recording medium and the separation claw rub directly. As a result, a small amount of toner on the recording medium moves to the tip of the separation claw, and the toner is fixed. When the amount of the adhered toner increases with time, the toner adhered to the tip of the separation claw comes into contact with the surface of the fixing belt as described above, which causes the tip of the separation claw to float from the surface of the fixing belt. A large gap may be formed between the tip of the separation claw and the fixing belt, and the recording medium attached to the fixing belt may enter there, and the recording medium may not be separated from the fixing belt.

On the other hand, since the separation rotating body 22 shown in FIGS. 2 to 5 is rotationally driven in the above-described direction, the recording medium P moves while being in contact with the surface of the separation rotating body 22. However, since the surface of the separation rotator 22 moves in the same direction as the moving direction of the recording medium P, the surface of the separation rotator 22 and the toner on the recording medium do not rub against each other violently. It is possible to prevent a large amount of toner from adhering to the peripheral surface of 22. Therefore, the recording medium P can be efficiently separated from the surface of the fixing belt 12 for a long period of time.

Further, in the fixing device of this embodiment, unlike the separating claws arranged in the immovable state, the recording medium P is separated from the surface of the fixing belt 12 while positively rotating the separating rotor 22. The recording medium can be more reliably separated from the surface of the fixing belt 12 than the separation claw.

As shown in FIG. 4, while the leading end side of the recording medium P is gripped by the outlet roller pair 21 and a part of the recording medium P adheres to the surface of the fixing belt 12,
When a large amount of toner is present on the recording medium P and the recording medium strongly adheres to the fixing belt 12, in the conventional fixing device, the adhesive force of the recording medium to the fixing belt is too strong, and the recording medium is Although the paper may be pulled back to the side of the fixing belt to cause a jam, in the fixing device of this example, the separating rotary body 22 positively peels the recording medium P from the surface of the fixing belt 12 while rotating. As described above, since the external force is exerted on the recording medium P, the recording medium P is not pulled back toward the fixing belt 12 to cause a jam.

By the way, the image forming apparatus shown in FIG.
The recording medium P that has passed through the fixing device 2 is discharged to the discharge tray as it is, and the recording medium P is conveyed as shown by an arrow E, and the recording medium P is turned upside down, and then an intermediate feeding (not shown) is performed. The recording medium is fed into the paper device, and then the recording medium is re-fed from here, and one surface on which the toner image has already been fixed and the other surface on the opposite side are turned up, and the transfer belt is again indicated by an arrow B. Each image carrier 3 while being transported by 4.
Y, 3M, 3C, and 3BK are allowed to pass therethrough, and an unfixed toner image of four colors can be formed on the other surface of the recording medium. Then, by passing the recording medium through the fixing device 2 again, the toner image carried on the other surface is fixed to the recording medium, and then the recording medium is conveyed in the direction of arrow D and discharged to the discharge tray. To do.

As described above, when the recording medium P is fed into the fixing device 2 again, the toner image already fixed is carried on one surface of the recording medium P, as indicated by reference numeral T1 in FIG. The unfixed toner image T is carried on the other surface. When the toner image T1 and the recording medium P carrying the unfixed toner image T pass through the nip portion N of the fixing device 2, the toner image T1 comes into contact with the surface of the pressure roller 13, and at this time, the toner image T1. When is heated and melted, the toner of the toner image T1 acts as an adhesive, and the recording medium may adhere to the surface of the pressure roller 13 and wind around it.

Therefore, the fixing device 2 shown in FIGS.
In the above, another separating rotary member 22A having the same structure as the above-described separating rotary member 22 is provided so as to face the fixing member composed of the pressure roller 13. This separated rotating body 22A
The relationship between the pressure roller 13 and the pressure roller 13 is as described above.
There is no substantial difference from the relationship between 2 and the fixing member formed of the fixing belt 12. Accordingly, it is possible to prevent the recording medium P from winding around the peripheral surface of the pressure roller 13.

Further, as shown in FIG.
Fixing rollers 12A, 1 heated by 6A, 17A
A pair of fixing members 3A are brought into pressure contact with each other, and the fixing rollers 12A and 13A are rotationally driven in the directions of the arrows, respectively, and the nip portion N of both fixing rollers 12A and 13A is driven.
In addition, a fixing device 2 that passes a recording medium P conveyed in the direction of arrow C and fixes the toner image carried on the recording medium P is also known. An image forming apparatus is also known in which the unfixed toner image T is transferred to each surface of the recording medium P shown in FIG. 7 and the toner image T on each surface is simultaneously fixed by the fixing device 2. Even in such a fixing device, each fixing roller 12
By providing the separate rotating bodies 22 and 22A facing the A and 13A, the recording medium P can be used for any fixing roller 12.
It is possible not to wrap around A and 13A.

In the fixing device of each of the above-mentioned examples, the separate rotating members 22 and 22A are provided so as to face the fixing members, respectively, but the image forming device forms the toner image only on one surface of the recording medium. In this case, the separating rotary member may be provided only for the fixing member on the side in contact with the toner image.

Further, as shown in FIG. 8, the heater 1 is internally provided.
The recording medium P carried on the belt 26 is passed together with the belt 26 through the nip portion N of the pair of fixing members composed of the fixing rollers 12A and 13A in which 6A and 17A are provided. The fixing device 2 for fixing the toner image T carried on one surface or both surfaces thereof is also provided with the separating rotary members 22 and 22A facing at least one of the fixing rollers, whereby any of the fixing rollers 12A and 13A is provided. The recording medium P can be configured so as not to wrap around.

Further, as shown in FIG. 9, a toner image T is transferred from an unillustrated photoreceptor to an intermediate transfer member 24 rotating in the direction of arrow G, and heated by an internal heater 16B to move in the direction of arrow H. The recording medium P is passed through the nip portion N between the fixing member composed of the fixing roller 12B that rotates in the vertical direction and the intermediate transfer body 24. At this time, the toner image T on the intermediate transfer body 24 is transferred onto the recording medium P by the action of heat and pressure. An image forming apparatus that transfers the toner image onto the recording medium P and fixes the toner image on the recording medium P is also known. In this case, the fixing roller 12B constitutes one fixing member, and the intermediate transfer member 24 also serves as the other fixing member. Even in the case of such a fixing device, the fixing member composed of the intermediate transfer member 24 is also used. Separation rotor 2 facing each other
By providing 2, the recording medium P can be prevented from being wound around the intermediate transfer body 24.

As described above, the separating rotary member can be applied to the fixing device having various configurations. The point is that the separating rotary member faces at least one fixing member and separates the recording medium attached to the fixing member. Is provided, and the surface of the separation rotary body at the facing portion of the separation rotary body and the fixing member facing the separation rotary body is
By rotating and driving the separation rotating body in the direction opposite to the moving direction of the surface of the fixing member, it is possible to prevent the recording medium from winding around the fixing member and causing a jam.

By the way, in each of the examples described above, the separating rotary member may be brought into contact with the surface of the fixing member. However, with such a structure, the separating rotary member and the fixing member move in opposite directions at their facing portions. Therefore, the surface of the fixing member is scratched by the separating rotary member and may be broken when the fixing member is used for a long time. Further, when the fixing member is scratched, there is a possibility that toner adheres to the fixing member and is fixed, or that the toner adhered on the fixing member is transferred onto the recording medium and disturbs the image.

Therefore, in the fixing device of each of the above-described examples, the distance between the separating rotary member and the fixing member facing each other is 0.
There is a gap of 1 mm to 1 mm. FIG. 6 shows FIG.
As shown in the drawing, a gap δ of 0.1 to 1 mm is provided between the fixing member composed of the fixing belt 12 and the separating rotary member 22. According to this structure, it is possible to prevent the trouble that the surface of the fixing belt 12 is damaged by the contact of the separating rotary member 22 with the surface thereof.

When the gap δ is opened between the separating rotary member 22 and the fixing belt 12 as described above, the tip of the recording medium P attached to the surface of the fixing belt 12 has the gap δ.
It is also possible to dive into. However, the separation rotor 2
Since No. 2 rotates in the direction to pull out the recording medium P from the gap δ, even if the leading end of the recording medium enters the gap δ, the recording medium is immediately pulled out from the gap δ by the rotating rotating rotating body 22. Thus, the recording medium P is prevented from winding around the surface of the fixing belt 12. For example, a large amount of toner is present in the widthwise central portion of the recording medium P, and the adhesive force of the toner causes the recording medium P exiting the nip portion N to adhere strongly to the fixing belt 12, and thus the widthwise central portion of the recording medium P. Even if the front end sunk into the gap δ as shown by the chain line in FIG. 5, the plurality of separating rotary bodies 22 apply an external force to the recording medium P in the direction in which the front end is pulled out from the gap δ, and the recording medium P The front end of the central portion of is fixed to the surface of the fixing belt 12. As a result, the recording medium P is conveyed without wrapping around the surface of the fixing belt 12 as shown in FIGS.

A fixing device has been proposed in which a separation sheet made of a thin sheet is provided in proximity to the surface of the fixing member in a non-contact state, and the recording medium adhered to the surface of the fixing member is separated by the separation sheet. If the sheets are placed opposite to each other with a gap of about 0.1 to 1 mm from the surface of the fixing member, the separation sheet will bend slightly, so it is not possible to maintain the gap at a constant size over the entire length of the separation sheet. Have difficulty. On the other hand, in the fixing device of this example, since the plurality of separating rotary bodies 22 are supported by the common shaft 23, all the separating rotary bodies 22 are opposed to the surface of the fixing member with a predetermined gap δ. Can be placed.

By the way, the rotational speed of the separating rotary member 22 can be set as appropriate, but the magnitude of the radial outermost linear velocity of the separating rotary member and the surface linear velocity of the fixing member facing this separating rotary member. If the size of the recording medium is significantly different, the recording medium is conveyed at substantially the surface linear velocity of the fixing member, so that the surface linear velocity of the separating rotary member and the conveying speed of the recording medium are greatly different. When the recording medium moves while being in contact with the separating rotary member, a streak-like mark is formed on the toner image on the recording medium due to the contact of the separating rotary member, and the image quality thereof may deteriorate.

Therefore, in the fixing device of each of the above-described examples, the magnitude of the linear velocity at the outermost radial direction of the separating rotary member and the magnitude of the surface linear velocity of the fixing member facing this are substantially equal to each other. , The rotation speed of the separation rotor is set. More specifically, the separation rotary body 2 shown in FIG.
When the magnitude of the linear velocity at the outermost portion in the radial direction of 2 is V1 and the magnitude of the surface linear velocity of the fixing belt 12 is V2, V1 and V2 are substantially equal to each other, preferably V1 = V2 The rotator 22 is driven to rotate. As a result, the speed difference between the outermost part of the separating rotary member 22 and the recording medium P contacting the separating rotary member 22 is eliminated, or the difference becomes extremely small. It is possible to prevent the generation of streak-like marks on the toner image because the scraping force is not applied. This also applies to the fixing devices of other examples.

Although the surface of the separating rotary member may be smooth, if the surface of the separating rotary member is uneven as in the separating rotary member of each of the above-described examples, the recording medium is attached to the separating rotary member. When contacting, only the convex and concave portions on the surface of the separating rotor contact the toner image on the recording medium, so even if the contact makes a mark on the toner image, the mark is not noticeable and is ignored. It is possible to prevent the deterioration of the image quality.

Further, as can be seen from FIG. 3, the separation rotary member 2
When unevenness is formed on the surface of No. 2, the tip of the recording medium P engages with the unevenness, so that the separating rotary body 22 enhances the action of peeling the recording medium from the fixing belt 12, and the separating rotary body is separated. The function is further improved.

The separating rotary member may be composed of, for example, an endless belt wound around a plurality of rollers, but if the separating rotary member is composed of rollers as in the illustrated example, the structure can be simplified. Moreover, the cost can be kept low.

Although FIG. 1 shows an example in which the fixing device 2 is provided in the image forming apparatus for forming a color image, the present invention can be applied to the image forming apparatus for forming a single color image and the fixing device thereof. Further, the present invention can be widely applied to image forming apparatuses such as copiers, facsimiles, and complex machines.

[0049]

According to the present invention, the recording medium can be effectively separated from the surface of the fixing member, and the problem that the recording medium is wound around the surface of the fixing member and a jam occurs can be effectively suppressed.

[Brief description of drawings]

FIG. 1 is a schematic diagram illustrating an example of an image forming apparatus.

FIG. 2 is an enlarged cross-sectional view of the fixing device shown in FIG.

3 is a sectional view similar to FIG. 2, showing a state in which a leading end portion of a recording medium passes through a nip portion between a fixing belt and a pressure roller of the fixing device shown in FIG.

FIG. 4 is a sectional view similar to FIG. 2, showing a state in which a recording medium is further conveyed.

FIG. 5 is a perspective view illustrating a relative positional relationship between a separation rotating body and a fixing belt.

FIG. 6 is a partially enlarged view of FIG.

FIG. 7 is a schematic cross-sectional view showing another example of a fixing device.

FIG. 8 is a schematic cross-sectional view showing still another example of the fixing device.

FIG. 9 is a schematic sectional view showing still another example of a fixing device.

[Explanation of symbols]

2 fixing device 22 Separate rotating body 22A Separate rotating body N Nip part P recording medium T toner image V1 linear velocity V2 linear velocity δ gap

Continued front page    F term (reference) 2H033 AA16 AA42 BA11 BA15 BA20                       BA21 BA22 BA25 BA30 BB18                 2H200 FA06 GA12 GA34 GA47 GB11                       GB22 GB25 GB26 HA02 HB12                       JA02 JB06 JB16 KA01 KA11                       KA23 LA06 LA19                 3F049 CA02 DA03 DB02 LA02 LB03                 3F053 AA10 AA26 LA02 LB03

Claims (6)

[Claims] 1. A fixing device for allowing a recording medium to pass through a nip portion between a pair of fixing members and applying heat and pressure to the toner of the toner image to fix the toner image on the recording medium at least one of the fixing devices. A separating rotary member for separating the recording medium adhered to the fixing member is provided facing the fixing member of
At the facing portion of the separating rotary body and the fixing member facing the separating rotary body, the separating rotary body is rotationally driven so that the surface of the separating rotary body moves in the direction opposite to the moving direction of the surface of the fixing member. A fixing device characterized by: 2. The fixing device according to claim 1, wherein a gap of 0.1 mm to 1 mm is provided between the separating rotary member and the fixing member which face each other. 3. The fixing device according to claim 1, wherein the magnitude of the outermost linear velocity of the separating rotary member and the magnitude of the surface linear velocity of the fixing member facing the outermost portion are set to be substantially equal to each other. 4. The fixing device according to claim 1, wherein unevenness is formed on the surface of the separating rotary member. 5. The fixing device according to claim 1, wherein the separating rotary member is a roller. 6. An image forming apparatus comprising the fixing device according to claim 1.