JP2008122449A - Fixing device and image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fixing device and an image forming apparatus that can prevent a recording material from being wound around a heating body and facilitates jamming processing. <P>SOLUTION: The image forming device has first and second winding preventing members 31 and 32, which can come into contact with and leave a fixing film 23 and normally leave the fixing film 23; and when jamming occurs downstream from a heating nip part N, the second wiring preventing member 32 is made to abut against the fixing film 23, while it interlocks with the operation that the first winding, preventing abutment of member 31 against the fixing film 23. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fixing device and an image forming apparatus.

  Conventionally, in an image forming apparatus using an electrophotographic system, an image forming operation is performed as follows. For example, an electrostatic latent image is formed on the surface of a photosensitive drum as an image carrier, and the electrostatic latent image on the photosensitive drum is developed with a toner or the like as a developer to be a visible image. Is transferred to a sheet as a recording material by a transfer device, and an image is carried on the sheet. Then, the toner image on the sheet is fixed by a fixing device using pressure, heat or the like. The fixed sheet is discharged out of the device through a discharge path.

  The fixing device is provided with a heater and a pressure roller as fixing means. The toner image transferred sheet that has reached the fixing device enters the heating nip portion of the heater and the pressure roller. In the process where the sheet passes through the heating nip, the transferred toner image is heated and pressurized and fixed on the sheet surface.

  FIG. 7 is a schematic cross-sectional view of the image forming apparatus 101 according to the related art.

  As shown in FIG. 7, the image forming apparatus 101 emits a laser L based on the obtained image information by a scanner 102, and is on a photosensitive drum 104 built in a process cartridge 103 (hereinafter also referred to as CRG). Is irradiated with laser L. A latent image is formed on the photosensitive drum 104, and the latent image is developed with toner by the process cartridge 103.

  On the other hand, the sheets S stacked on the sheet stacking plate 106 in the feeding cassette 105 are fed one by one while being separated one by one by the feeding roller 107 and the separation pad 108, and are fed by the intermediate roller 109 and the conveying roller 110. Further, it is conveyed downstream. On the conveyed sheet S, a visible image of the toner formed on the photosensitive drum 104 is transferred by the transfer roller 111.

  Then, the sheet S on which the unfixed toner image is formed is conveyed further downstream, and the toner image is fixed by the heat fixing device 112 having a heat source therein, and then discharged to the outside by the discharge roller 113. Is done.

  The process cartridge 103 here includes a photosensitive drum 104 and at least one process means. Here, as the process means, for example, a charging means 103 a for charging the photosensitive drum 104, a developing means 103 b for developing a latent image formed on the photosensitive drum 104, and a cleaning means 103 c for cleaning toner remaining on the surface of the photosensitive drum 104. Etc. Further, the process cartridge 103 is attached and detached by opening the openable / closable cartridge cover 114.

  FIG. 8 is a schematic configuration diagram of the heat fixing device 112. Here, the outline will be described taking a pressure roller driving type film heating and fixing apparatus as an example. The heat fixing device 112 is a device disclosed in Patent Document 1 or the like, which uses a cylindrical film as a heat-resistant film and rotates the film with a pressure roller as a pressure unit.

Reference numeral 121 denotes a horizontally long thin plate-shaped heating element (hereinafter referred to as a heater) whose longitudinal direction is substantially perpendicular to the drawing (paper surface) shown in FIG. As the heater 121, a ceramic heater having a low heat capacity is generally used which includes a ceramic substrate and a heating resistor formed by printing and baking on the substrate surface.

  Reference numeral 122 denotes a horizontally long saddle type film guide having a substantially semicircular cross section and a heater support. The heater 121 is supported along the longitudinal direction of the support at the center of the lower surface of the heater support 122. The heater support 122 has a substantially semicircular cross-sectional outer shape and the outer periphery of the film 123 is loosely fitted.

  Reference numeral 124 denotes a flange member that receives the ends of the fixing film disposed at both ends of the heater support 122 and restricts the movement of the fixing film 123. Here, the heater 121, the heater support body 122, the film 123, and the flange member 124 constitute a heating body.

  Reference numeral 125 denotes an elastic pressure roller as a pressure member, and the lower surface of the heater 121 of the heater support 122 and the fixing film 123 are sandwiched and pressed against each other by a pressure spring 126 against the roller elasticity to have a required width. A heating nip portion N as a heating portion is formed.

  The pressure roller 125 is rotationally driven in a counterclockwise direction indicated by an arrow by a driving unit (not shown). A rotational force acts on the film 123 by the pressure friction force in the heating nip N between the outer surface of the roller 125 and the outer surface of the film 123 due to the rotation of the pressure roller 125. Then, the film 123 is driven to rotate in the clockwise direction indicated by the arrow on the outer periphery of the heater support 122 while the inner surface of the film 123 contacts and slides on the lower surface of the heater 121. The heater support 122 also serves as a guide for the rotating film 123.

  In the state where the film 123 is rotated by the rotation of the pressure roller 125 and the heater 121 generates heat by energization and the temperature is adjusted to a predetermined temperature, the unfixed toner image T is softened and melted and fixed as follows. Made. That is, the heating nip portion N is moved between the film 123 of the heating nip portion N and the pressure roller 125 on the toner image surface of the sheet S as a heated material on which the unfixed toner image T is formed and supported. As a result, the sheet S is heated by the heater 121 via the film 123 in the heating nip portion N, and the unfixed toner image T is softened and fused. The sheet S that has passed through the heating nip N is separated from the surface of the film 123 and conveyed.

  In this apparatus, in the rotation state of the film 123 driven by the pressure roller 125, the tension is not substantially applied to the film 123 except for the heating nip portion N. Therefore, there are advantages such that the film shift movement force along the length of the heater support 122 along with the rotation of the film is small, the film shift movement control means can be simplified, easy assembling and cost reduction can be achieved. There is.

  A roller 127 sandwiches and conveys the heated sheet. A discharge roller 128 forms a discharge nip with the roller 127. The roller 127 and the fixing discharge roller 128 sandwich and convey the heated sheet.

  A discharge lower guide 129 guides the lower side of the sheet on which the discharge roller 128 can be disposed. A discharge nip portion formed by the upper discharge guide 130 and the lower discharge guide 129 is configured to be gradually narrowed for easy and stable introduction into the discharge nip.

In a heat fixing device for a sheet to which a toner image has been transferred, when a trouble such as a jam occurs on the downstream side of the heating nip N and the sheet transport destination is interrupted, the destination of the sheet disappears, and the sheet is caught in the heating element. In some cases, jam handling is difficult.

  On the other hand, in the heat fixing apparatus shown in FIG. 8, the gap t with the fixing film 123 is narrowed by the rib provided on the fixing film 123 side of the upper discharge guide 130. Thus, even when a jam occurs for some reason and the sheet S is in an accordion state, the sheet S is prevented from being wound around the fixing film 123.

Moreover, the technique disclosed in Patent Document 2 includes a separation claw 131 that can contact and separate from a heating body, as shown in FIG. In the steady state, the separation claw 131 is separated from the heating body. When a jam occurs on the downstream side of the fixing nip portion N, the separation claw 131 comes into contact with the fixing film 123, so that the sheet S is wound around the fixing film 123. It is preventing.
JP-A-4-44075 JP-A-4-44076 JP-A-4-44077 JP-A-4-44078 JP-A-4-44079 JP-A-4-44080 JP-A-4-44081 JP-A-4-44082 JP-A-4-44083 JP-A-4-204980 JP-A-4-204981 JP-A-4-204982 JP-A-4-204983 JP-A-4-204984 JP 2002-99174 A

  However, even if the gap t is set narrow as in the heat fixing apparatus shown in FIG. 8, if the print density on the sheet S is high, the fixing film 123 and the sheet S are in close contact with each other via the toner. The sheet S may pass through the gap t. In such a case, the film is wound around the fixing film 123 as shown in FIG. As described above, when the sheet enters the nip portion N again, the trailing edge of the sheet S and the portion that has entered the nip portion N again are adhered to each other by the toner T, and jamming processing becomes difficult.

  In the heating and fixing apparatus shown in FIG. 10, the separation claw 131 is separated from the fixing film 123 in a steady state in order to protect the fixing film 123. For this reason, when the print density on the sheet S is high, as shown in FIG. 11, if the fixing film 123 and the sheet S are in close contact with each other through the toner, the sheet is formed before the separation claw 131 contacts the fixing film 123. S may pass and wrap around the fixing film 123.

  The present invention has been made in view of the circumstances as described above, and provides a fixing device and an image forming apparatus capable of preventing a recording material from being wound around a heating member and easily performing jam processing. With the goal.

In order to achieve the above object, the present invention provides:
The unfixed toner image is fixed on the recording material by sandwiching and transporting the recording material on which the unfixed toner image is formed at a heating nip portion formed by pressing the heating body and the pressure body together. In the fixing device,
A movable member provided so as to be movable with respect to the apparatus main body and moving when a jam occurs;
The recording medium is provided so as to be able to come into contact with and separate from the heating body, and is separated from the heating body in a steady state. An anti-winding member for preventing winding;
It is characterized by providing.

  An image forming apparatus includes the fixing device described above.

  According to the present invention, it is possible to provide a fixing device and an image forming apparatus that can prevent a recording material from being wound around a heating member and can easily perform jam processing.

  The best mode for carrying out the present invention will be exemplarily described in detail below with reference to the drawings. However, the dimensions, materials, shapes, and relative arrangements of the components described in this embodiment should be appropriately changed according to the configuration of the apparatus to which the invention is applied and various conditions. It is not intended to limit the scope to the following embodiments.

  An example in which the image forming apparatus according to the first embodiment of the present invention is used in a laser printer will be described. FIG. 1 is a schematic cross-sectional view of an image forming apparatus 1 according to the present embodiment.

  As shown in FIG. 1, the image forming apparatus 1 emits a laser L based on the obtained image information by a scanner 2, and applies the laser L onto a photosensitive drum 4 as an image carrier built in a process cartridge 3. Irradiate. A latent image is formed on the photosensitive drum 4, and the latent image is developed with toner by the process cartridge 3.

  On the other hand, the sheets S as recording materials stacked on the sheet stacking plate 6 in the feeding cassette 5 are fed one by one while being separated one by one by the feeding roller 7 and the separation pad 8, and conveyed to the intermediate roller 9. It is further conveyed downstream by the roller 10. On the conveyed sheet S, a visible image of the toner formed on the photosensitive drum 4 is transferred by the transfer roller 11.

  Then, the sheet S on which the unfixed toner image is formed is conveyed further downstream, and the toner image is fixed by a heat fixing device (fixing device) 12 having a heat source therein. It is discharged outside the machine.

  The process cartridge 3 here includes a photosensitive drum 4 and at least one process means. Here, as the process means, for example, a charging means 3 a for charging the photosensitive drum 4, a developing means 3 b for developing a latent image formed on the photosensitive drum 4, and a cleaning means 3 c for cleaning toner remaining on the surface of the photosensitive drum 4. Etc. The process cartridge 3 is provided so that it can be attached to and detached from the image forming apparatus 1 by opening a cartridge cover 14 as a second cover member that can be opened and closed with respect to the image forming apparatus 1. It has been. Here, the cartridge cover 14 is provided upstream of the heat fixing device 12 in the sheet conveying direction.

FIG. 2 is a schematic configuration diagram of the heat fixing device 12 of this embodiment. In this embodiment, a pressure roller driving type film heat fixing device will be described as a heat fixing device. The heat fixing device 12 uses a cylindrical film as a heat-resistant film disclosed in Patent Document 1 and the like,
This is a device for rotating the film with a pressure roller as a pressure means.

  21 is a horizontally long thin plate-shaped heating element (heat generation) whose longitudinal direction is a direction substantially perpendicular to the drawing (paper surface) shown in FIG. 2 (a direction orthogonal to the sheet conveying direction (hereinafter also referred to as a sheet width direction)). Part, hereinafter referred to as a heater). As the heater 21, a ceramic heater having a low heat capacity is generally used in which a ceramic substrate and a heating resistor formed by printing and baking on the substrate surface are used as basic constituents.

  Reference numeral 22 denotes a horizontally long saddle type film guide having a substantially semicircular cross section and a heater support. The heater 21 is supported at the center of the lower surface of the heater support 22 along the longitudinal direction of the support. Further, the heater support 22 has a substantially semicircular cross-sectional outer shape and is loosely fitted around the inner periphery of the fixing film 23.

  Reference numeral 24 denotes a flange member that receives the ends of the fixing film disposed at both ends of the heater support 22 and restricts the movement of the fixing film 23. Here, the heater 21, the heater support 22, the fixing film 23, and the flange member 24 constitute a heating body according to the present invention.

  Reference numeral 25 denotes an (elastic) pressure roller as a pressure body, and the lower surface of the heater 21 of the heater support 22 and the fixing film 23 are sandwiched and pressed against each other with a predetermined contact pressure against the roller elasticity. A heating (fixing) nip portion N is formed as a heating portion having a required width.

  The pressure roller 25 is rotationally driven in a counterclockwise direction indicated by an arrow by a driving unit (not shown). A rotational force acts on the fixing film 23 by a pressure friction force in the heating nip portion N between the outer surface of the pressure roller 25 and the outer surface of the fixing film 23 due to the rotation of the pressure roller 25. Then, due to the rotational force, the fixing film 23 is driven to rotate on the outer periphery of the heater support 22 while the inner surface of the fixing film 23 contacts and slides on the lower surface of the heater 21. The heater support 22 also serves as a guide for the rotating fixing film 23.

  In the state where the fixing film 23 is rotated by the rotation of the pressure roller 25 and the heater 21 generates heat by energization and is adjusted to a predetermined temperature, the unfixed toner image T is softened and melted and fixed as follows. Is made. That is, the toner image surface of the sheet S as a heated material that is nipped between the fixing film 23 that is the heating nip portion N and the pressure roller 25 and that forms and supports the unfixed toner image T is moved (conveyed). Let As a result, the sheet S is heated by the heater 21 via the fixing film 23 in the heating nip portion N, and the unfixed toner image T is softened and fused. The sheet S that has passed through the heating nip N is separated from the surface of the fixing film 23 and conveyed.

  In this apparatus, the tension is not substantially applied to the fixing film 23 except for the heating nip portion N when the fixing film 23 is rotated by driving the pressure roller 25. Therefore, there are advantages such that the film shift movement force along the length of the heater support 22 along with the rotation of the film is small and the film shift movement control means can be simplified, easy assembling and cost reduction can be achieved. There is.

  Reference numeral 27 denotes a roller for nipping and conveying the heated sheet. Reference numeral 28 denotes a fixing discharge roller that forms a discharge nip with the roller 27. The roller 27 and the fixing discharge roller 28 constitute conveyance means, and the heated sheet is nipped and conveyed. To do.

A discharge lower guide 29 guides the lower side of the sheet on which the discharge roller 28 can be disposed. The discharge nip portion formed by the upper discharge guide 30 and the lower discharge guide 29 is configured to be gradually narrowed in order to facilitate and stabilize the introduction into the discharge nip.

  However, in the heating and fixing device for the sheet to which the toner image has been transferred, when a trouble such as a jam occurs on the downstream side of the heating nip N and the sheet S transport destination is interrupted, the destination of the sheet S disappears, and the heating element The sheet S is wound on the sheet, and a situation in which the jam processing is difficult occurs. 2 to 4, an outline of a mechanism for preventing the sheet S from being wound around the fixing film 23 when a jam occurs and the sheet S enters an accordion state (bellows state) will be described.

  As shown in FIG. 2, reference numeral 31 denotes a first wrapping preventing member as a moving member supported so as to be able to move (rotate) counterclockwise by a rotating shaft 31a. In the (normal) state, it is biased to the position shown in FIG. At that time, the first wrapping preventing member 31 also serves as a guide member for guiding the sheet S to the discharge nip portion along the conveyance path, so that the sheet S can be stably conveyed to the discharge nip portion. . Reference numeral 32 denotes a wrapping preventing member (hereinafter referred to as a second wrapping preventing member) supported so as to be able to move (rotate) counterclockwise by a rotating shaft 32a. It is biased to position 2.

  Reference numeral 33 denotes a link member that is supported by the rotating shaft 33a and interlocks the first wrapping preventing member 31 and the second wrapping preventing member 32. At this time, since the first and second wrapping preventing members 31 and 32 are separated from the fixing film 23 in a steady state, the fixing film 23 is not damaged during normal use.

  Moreover, the contact part 31b to the link member of the 1st anti-winding member 31 has springiness (elasticity). Thus, the second wrapping preventing member 32 can be brought into contact with the fixing film 23 before the first wrapping preventing member 31 comes into contact with the fixing film 23. That is, after the second wrapping preventing member 32 comes into contact with the fixing film 23 in conjunction with the movement of the first wrapping preventing member 31, the first wrapping preventing member is elastically deformed after the contact portion 31b is elastically deformed. 31 further moves and comes into contact with the fixing film 23. Here, the case where the first wrapping prevention member 31 is provided with the spring contact portion 31b is described. However, the present invention is not limited to this, and the second wrapping prevention member 32 and the link member 33 are in contact with each other. Even if the part has elasticity, the same effect can be obtained. In this embodiment, the link member is in contact with the first wrapping preventing member 31 and the second wrapping preventing member 32. However, the present invention is not limited to this, and the link member is connected (engaged) with elasticity. It may be.

  Further, by arranging the second wrapping preventing member 32 on the upper part of the heating body, the second wrapping preventing member 32 is earlier (first) before the wound sheet S reaches the position of the second wrapping preventing member 32. Can be brought into contact with the fixing film 23. Here, arranging the second wrapping preventing member 32 on the top of the heating body can be restated as follows. That is, the second wrapping preventing member 32 is provided so as to contact the fixing film 23 at a position farther from the heating nip portion N than the first wrapping preventing member 31. Further, by using the link member 33, the first wrapping preventing member 31 and the second wrapping preventing member 32 can be reliably interlocked even if they are arranged at positions separated from each other.

  As shown in FIGS. 3 and 4, when a jam occurs for some reason and the sheet S enters the accordion state, the jammed sheet S in the accordion state contacts the first wrapping prevention member 31 and the first wrapping prevention member 31. Press. Then, the link member 33 is rotated when the sheet S in the accordion state rotates the first anti-winding member 31 counterclockwise. As a result, the second wrapping preventing member 32 rotates and comes into contact with the fixing film 23.

  FIG. 3 shows a state in which the first winding preventing member 31 prevents the sheet S from being wound around the fixing film 23. FIG. 4 shows a state where the second wrapping preventing member 32 prevents the sheet S from being wound around the fixing film 23.

  Here, as shown in FIG. 4, when the printing density on the sheet S is high, the fixing film 23 and the sheet S are in close contact with each other through the toner. It is conceivable that the sheet S passes before coming into contact with the sheet.

  However, even in such a case, according to the present embodiment, since the second wrapping preventing member 32 is in contact with the fixing film 23 first, it is possible to reliably prevent wrapping.

  Although the heating and fixing apparatus in this embodiment has been described using a film heating type heating and fixing apparatus, the heating system is not limited to the film heating type heating and fixing apparatus.

  Next, Embodiment 2 according to the present invention will be described with reference to FIGS. In addition, a present Example changes a part of Example 1, the same code | symbol is attached | subjected about the component similar to Example 1, and the description is abbreviate | omitted.

  FIG. 5 is a schematic configuration diagram of the heat fixing device 12 of this embodiment.

  As shown in FIG. 5, reference numeral 34 denotes a wrapping prevention member supported so as to be able to move (rotate) counterclockwise by a rotating shaft 34a, and at a position shown in FIG. 5 in a steady state by its own weight or spring (not shown). It is energized. At this time, since the wrapping preventing member 34 is separated from the fixing film 23 in a steady state, the fixing film 23 is not damaged during normal use.

  Further, the discharge upper guide 30 as a moving member is supported by a rotating shaft 30a so as to be able to move (rotate) clockwise, and is urged to a position shown in FIG. 5 by a spring or the like (not shown) in a steady state. Here, the upper discharge guide 30 is provided with a roller 27 constituting a part of the conveying means.

  FIG. 6 shows a state in which the wrapping prevention member 34 prevents the sheet S from being wound around the fixing film 23.

  As shown in FIG. 6, when a jam occurs for some reason and the sheet S enters the accordion state, the sheet S in the accordion state enters between the discharge upper guide 30 and the fixing film 23 and rotates the discharge upper guide 30 clockwise. Move. At this time, the contact portion 30 b of the discharge upper guide 30 contacts the wrapping prevention member 34, so that the wrapping prevention member 34 rotates in conjunction with the rotation operation of the discharge upper guide 30 and contacts the fixing film 23. You will be in touch. Thereby, winding of the sheet S around the fixing film 23 can be prevented. Further, when the jam processing is performed after the winding is prevented, the discharge upper guide 30 rotates, so that the jam processing can be easily performed.

  The upper discharge guide 30 may be provided so as to come into contact with the fixing film 23 like the first wrapping prevention member 31 of the first embodiment described above.

In this case, as in the first embodiment, the contact portion between the discharge upper guide 30 and the wrapping prevention member 34 may be elastic. When a jam occurs, the wrapping prevention member 34 rotates in contact with the moving operation of the discharge upper guide 30 and comes into contact with the fixing film 23. Then, the contact portion elastically deforms, whereby the discharge upper guide. 30 may be provided so as to move further and come into contact with the fixing film 23.

1 is a schematic cross-sectional view illustrating an image forming apparatus according to Embodiment 1. FIG. FIG. 2 is an enlarged schematic diagram of a fixing device according to the first embodiment. FIG. 2 is an enlarged schematic diagram of a fixing device according to the first embodiment. FIG. 2 is an enlarged schematic diagram of a fixing device according to the first embodiment. FIG. 4 is an enlarged schematic diagram of a fixing device according to a second embodiment. FIG. 4 is an enlarged schematic diagram of a fixing device according to a second embodiment. FIG. 10 is a schematic cross-sectional view showing a conventional image forming apparatus. The expansion schematic of the conventional heat fixing apparatus. The expansion schematic of the conventional heat fixing apparatus. The expansion schematic of the conventional heat fixing apparatus. The expansion schematic of the conventional heat fixing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 12 Heat fixing apparatus 23 Fixing film 30 Ejection upper guide 31 1st anti-winding member 31b 1st anti-winding member contact part 32 2nd anti-winding member 33 Link member 34 Anti-winding member S Sheet T Toner N Heating nip part

Claims (11)

The unfixed toner image is fixed on the recording material by sandwiching and transporting the recording material on which the unfixed toner image is formed at a heating nip portion formed by press-contacting each other with a heating body and a pressure body. In the fixing device,
A movable member provided so as to be movable with respect to the apparatus main body and moving when a jam occurs;
The recording medium is provided so as to be able to contact and separate from the heating body, and is separated from the heating body in a steady state, and the recording material is brought into contact with the heating body by contacting the heating body in conjunction with the moving operation of the moving member. An anti-winding member for preventing winding;
A fixing device comprising:   The fixing device according to claim 1, wherein the moving member has a function of guiding the recording material nipped and conveyed by the heating nip portion so as to be conveyed along a conveyance path.   The moving member is provided so as to be able to come into contact with and separate from the heating body, and is separated from the heating body in a steady state. The fixing device according to claim 1, wherein winding is prevented.   The fixing device according to claim 3, wherein the wrapping prevention member is provided so as to contact the heating body at a position farther from the heating nip portion than the moving member.   The fixing device according to claim 4, wherein the wrapping prevention member is provided so as to contact the heating body earlier than the moving member when a jam occurs.   6. The fixing device according to claim 1, further comprising a link member that interlocks an operation of the wrapping prevention member contacting the heating body with a moving operation of the moving member. An abutting portion provided between the moving member and the link member;
A contact portion provided between the wrapping prevention member and the link member;
At least one of the contact portions has elasticity,
When a jam occurs, the wrapping prevention member abuts on the heating body in conjunction with the movement of the movement member, and then the abutment portion elastically deforms, so that the movement member further moves to The fixing device according to claim 6, wherein the fixing device is in contact with a heating body. The moving member is provided to abut the wrapping preventing member against the heating body by moving and contacting the wrapping preventing member when a jam occurs.
The contact portion between the moving member and the wrapping prevention member has elasticity,
When a jam occurs, the wrapping prevention member abuts on the heating body in conjunction with the movement of the movement member, and then the abutment portion elastically deforms, so that the movement member further moves to The fixing device according to claim 5, wherein the fixing device is in contact with a heating body.   The fixing device according to claim 1, wherein the moving member is provided with a part of a conveying unit that conveys a recording material.   10. The moving member according to claim 1, wherein when the jam occurs, the moving member moves when the jammed recording material abuts against the moving member and presses the moving member. 11. Fixing device. An image forming apparatus comprising the fixing device according to claim 1.

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