JP6123203B2 - Fixing device - Google Patents

Fixing device Download PDF

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Publication number
JP6123203B2
JP6123203B2 JP2012211845A JP2012211845A JP6123203B2 JP 6123203 B2 JP6123203 B2 JP 6123203B2 JP 2012211845 A JP2012211845 A JP 2012211845A JP 2012211845 A JP2012211845 A JP 2012211845A JP 6123203 B2 JP6123203 B2 JP 6123203B2
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Prior art keywords
heat insulating
insulating material
nip
fixing device
member
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JP2012211845A
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JP2014066852A (en
Inventor
智昭 枦山
智昭 枦山
裕次 西垣
裕次 西垣
泰弘 丸山
泰弘 丸山
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ブラザー工業株式会社
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Priority to JP2012211845A priority Critical patent/JP6123203B2/en
Priority claimed from US14/018,788 external-priority patent/US9063485B2/en
Publication of JP2014066852A publication Critical patent/JP2014066852A/en
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Publication of JP6123203B2 publication Critical patent/JP6123203B2/en
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Description

  The present invention relates to a fixing device configured to thermally fix a developer image transferred to a recording sheet.

  Conventionally, in a fixing device for thermally fixing a developer image transferred to a recording sheet, fixing is performed between a cylindrical fixing belt, a heating element and a nip member disposed inside the fixing belt, and the nip member. There is known a pressure roller that sandwiches a belt and a stay that supports a nip member from the opposite side of the pressure roller (for example, see Patent Document 1).

  In this technique, the heating element heats the nip member, and the heated nip member heats the recording sheet conveyed between the fixing belt and the pressure roller.

JP 2011-203405 A

  By the way, in the technique as described above, it is considered that a heat insulating material is provided between the stay and the nip member so that the heating efficiency, in particular, the rise in temperature at the start-up is not deteriorated due to the stay taking heat from the nip member. It is done. However, if the heat hardly transfers from the nip member to the stay, when the nip member is cooled, for example, when the heating element is turned off, the heat of the nip member cannot be released to the stay, and the temperature becomes high. There is a possibility that the nip member that has become uncooled is not easily cooled.

  Accordingly, the present invention provides a fixing device that can reduce the heat of the nip member from moving to the stay when the nip member is heated, and can release the heat of the nip member to the stay when the nip member is cooled. The purpose is to do.

In order to achieve the above object, a fixing device of the present invention is a fixing device configured to thermally fix a developer image transferred to a recording sheet, and includes a cylindrical fixing belt and an inner side of the fixing belt. A heating element disposed in the belt, a nip member disposed so that the inner surface of the fixing belt is in sliding contact, a rotating body that sandwiches the fixing belt between the nip member, and a side opposite to the rotating body of the nip member. And a stay having a support portion.
The support unit includes a first support unit that supports the nip member on the upstream side in the conveyance direction of the recording sheet with respect to the heating element, and a second support unit that supports the nip member on the downstream side in the conveyance direction with respect to the heating element. Yes.
A heat insulating material is provided between only one of the first support part and the second support part and the nip member.

  According to the fixing device configured as described above, since the heat insulating material is provided between one of the first support portion and the second support portion and the nip member, the heat of the nip member stays at the time of heating the nip member. Can be reduced. In addition, since no heat insulating material is provided between the other of the first support part and the second support part and the nip member, when the nip member is cooled, the heat of the nip member is released to the stay and the nip member is cooled quickly. can do.

The fixing device described above includes a reflective member formed so as to cover the heating element, and the reflective member may have a flange portion extending away from the heating element at an end portion on the nip member side. .
In this case, the flange portion can be configured to be sandwiched between the nip member and the support portion.

  In the fixing device in which the reflecting member has a flange portion, the heat insulating material may be disposed between the nip member and the flange portion.

  In the fixing device in which the reflection member has a flange portion, the heat insulating material may be disposed between the flange portion and the support portion.

In order to achieve the above object, a fixing device of the present invention is a fixing device configured to thermally fix a developer image transferred to a recording sheet, and includes a cylindrical fixing belt and a fixing belt. A heating element disposed inside the nip member, a nip member disposed so that the inner surface of the fixing belt is in sliding contact, a rotating body that sandwiches the fixing belt between the nip member, and a side opposite to the rotating body of the nip member. And a stay having a supporting portion for supporting.
The support unit includes a first support unit that supports the nip member on the upstream side in the conveyance direction of the recording sheet with respect to the heating element, and a second support unit that supports the nip member on the downstream side in the conveyance direction with respect to the heating element. Yes.
A first heat insulating material is provided between the first support portion and the nip member, and a second heat insulating material is provided between the second support portion and the nip member, and the first heat insulating material and the second heat insulating material are provided. The materials have different heat insulation effects.

  According to the fixing device configured as described above, the first heat insulating material or the second heat insulating material is provided between the first support portion and the nip member and between the second support portion and the nip member. When the nip member is heated, the heat of the nip member can be reduced from moving to the stay. Further, since the first heat insulating material and the second heat insulating material have different heat insulating effects, one of the first support portion and the nip member and between the second support portion and the nip member is moved from the nip member to the stay. Since the heat can be configured to be transferred, when the nip member is cooled, the heat of the nip member is released to the stay, and the nip member can be quickly cooled.

  According to the present invention, when the nip member is heated, the heat of the nip member can be reduced from moving to the stay, and when the nip member is cooled, the heat of the nip member can be released to the stay.

1 is a diagram illustrating a schematic configuration of a laser printer including a fixing device according to an embodiment of the present invention. FIG. 3 is a cross-sectional view of a fixing device. It is a perspective view of a nip board. They are a perspective view (a) of a reflective member and a stay, and an expanded sectional view (b) of the B section in (a). It is an expanded sectional view which shows a halogen lamp, a nip plate, a reflective member, a stay, and a heat insulating material. FIG. 6 is an enlarged cross-sectional view showing a halogen lamp, a nip plate, a reflecting member, a stay, and a heat insulating material in a fixing device according to a first modification. FIG. 9 is an enlarged cross-sectional view illustrating a halogen lamp, a nip plate, a reflecting member, a stay, a first heat insulating material, and a second heat insulating material in a fixing device according to a second modification. FIG. 10 is an enlarged cross-sectional view illustrating a halogen lamp, a nip plate, a reflecting member, a stay, and a heat insulating material in a fixing device according to a third modification. FIG. 10 is an enlarged cross-sectional view illustrating a halogen lamp, a nip plate, a reflecting member, a stay, and a heat insulating material in a fixing device according to a fourth modification.

  Next, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the following description, first, a schematic configuration of the laser printer 1 including the fixing device 100 of the present invention will be described, and then a characteristic part of the present invention will be described in detail.

  In the following description, the direction will be described with reference to the user who uses the laser printer 1. That is, the left side in FIG. 1 is “front”, the right side is “rear”, the front side is “right”, and the back side is “left”. Also, the vertical direction in FIG.

<Schematic configuration of laser printer>
As shown in FIG. 1, a laser printer 1 includes a main body housing 2 that feeds a sheet S as an example of a recording sheet, an exposure device 4, and a toner image (developer) on the sheet S. And the fixing device 100 for thermally fixing the toner image on the paper S.

  The paper feed unit 3 is provided at a lower portion in the main body housing 2 and mainly includes a paper feed tray 31, a paper pressing plate 32, and a paper feed mechanism 33. The paper S stored in the paper feed tray 31 is moved upward by the paper pressing plate 32 and supplied toward the process cartridge 5 (between the photosensitive drum 61 and the transfer roller 63) by the paper feed mechanism 33.

  The exposure apparatus 4 is disposed in the upper part of the main body housing 2 and includes a laser light emitting unit (not shown), a polygon mirror, a lens, a reflecting mirror, and the like that are not shown. In this exposure device 4, the surface of the photosensitive drum 61 is exposed by scanning the surface of the photosensitive drum 61 at high speed with laser light (see the chain line) based on the image data emitted from the laser light emitting unit.

  The process cartridge 5 is disposed below the exposure apparatus 4 and is detachably mounted on the main body housing 2 through an opening formed when the front cover 21 provided on the main body housing 2 is opened. Yes. The process cartridge 5 includes a drum unit 6 and a developing unit 7.

  The drum unit 6 mainly includes a photosensitive drum 61, a charger 62, and a transfer roller 63. The developing unit 7 is configured to be detachably attached to the drum unit 6, and includes a developing roller 71, a supply roller 72, a layer thickness regulating blade 73, and a toner that contains toner (developer). The housing part 74 is mainly provided.

  In the process cartridge 5, the surface of the photosensitive drum 61 is uniformly charged by the charger 62 and then exposed by high-speed scanning of the laser light from the exposure device 4, whereby an image is formed on the photosensitive drum 61. An electrostatic latent image based on the data is formed. Further, the toner in the toner container 74 is supplied to the developing roller 71 via the supply roller 72 and enters between the developing roller 71 and the layer thickness regulating blade 73 to form a thin layer of a certain thickness on the developing roller 71. It is carried on.

  The toner carried on the developing roller 71 is supplied from the developing roller 71 to the electrostatic latent image formed on the photosensitive drum 61. As a result, the electrostatic latent image is visualized and a toner image is formed on the photosensitive drum 61. Thereafter, the sheet S is conveyed between the photosensitive drum 61 and the transfer roller 63 so that the toner image on the photosensitive drum 61 is transferred onto the sheet S.

  The fixing device 100 is provided behind the process cartridge 5. The toner image (toner) transferred onto the paper S is thermally fixed onto the paper S by passing through the fixing device 100. The paper S on which the toner image has been thermally fixed is discharged onto the paper discharge tray 22 by the transport rollers 23 and 24.

<Detailed configuration of fixing device>
As shown in FIG. 2, the fixing device 100 includes a cylindrical fixing belt 110, a heating unit 200 that is disposed inside the fixing belt 110 and heats the fixing belt 110, and the fixing belt 110. And a pressure roller 140 as an example of a rotating body that sandwiches the roller.

  The fixing belt 110 is a belt having heat resistance and flexibility that is heated by a heating unit 200 described later. The rotation of the fixing belt 110 is guided by a guide member that is omitted from the reference numerals.

  The pressure roller 140 is an elastically deformable member and is disposed below the fixing belt 110 and a heating unit 200 described later. The pressure roller 140 is configured to form a nip portion N by sandwiching the fixing belt 110 with the heating unit 200 (nip plate 220) in an elastically deformed state. In the present embodiment, the heating unit 200 and the pressure roller 140 are configured to be in pressure contact with each other by being urged toward the other.

  The pressure roller 140 is configured to be rotationally driven by a driving force transmitted from a motor (not shown) provided in the main body housing 2, and to rotate with the fixing belt 110 (or the paper S). The fixing belt 110 is driven to rotate by the frictional force. As a result, the sheet S on which the toner image is transferred is conveyed in the front-rear direction between the pressure roller 140 and the heated fixing belt 110, whereby the toner image (toner) is thermally fixed.

  The heating unit 200 is a unit that heats the toner on the paper S via the fixing belt 110, and includes a halogen lamp 210 as an example of a heating element, a nip plate 220 as an example of a nip member, a reflection member 230, And a stay 240.

  The halogen lamp 210 is a heater that emits radiant heat to heat the toner on the paper S by heating the nip plate 220 and the fixing belt 110. Inside the fixing belt 110, a predetermined amount is applied from the inner surfaces of the fixing belt 110 and the nip plate 220. It is arranged with an interval of.

  The nip plate 220 is a plate-like member that receives radiant heat from the halogen lamp 210, and is arranged inside the fixing belt 110 so that the inner peripheral surface of the cylindrical fixing belt 110 is in sliding contact with the lower surface thereof. In the present embodiment, the nip plate 220 is formed, for example, by processing an aluminum plate or the like having a higher thermal conductivity than a steel stay 240 described later.

  As shown in FIG. 3, the nip plate 220 has a base portion 221 formed in a plate shape that is long on the left and right sides, and a bent portion 222 provided at the front and rear ends of the base portion 221.

  The base portion 221 is a portion whose lower surface is in contact with the inner peripheral surface of the fixing belt 110, and transmits heat from the halogen lamp 210 to the toner on the paper S via the fixing belt 110. The bent portion 222 is formed to extend upward from the front and rear ends of the base portion 221.

  As shown in FIG. 2 and FIG. 4A, the reflecting member 230 transmits the radiant heat from the halogen lamp 210 (radiant heat radiated mainly in the front-rear direction and the upward direction) to the nip plate 220 (the upper surface of the base portion 221). ) And is disposed at a predetermined interval from the halogen lamp 210 so as to cover the halogen lamp 210.

  By collecting the radiant heat from the halogen lamp 210 to the nip plate 220 by such a reflecting member 230, the radiant heat from the halogen lamp 210 can be used efficiently, and the nip plate 220 and the fixing belt 110 can be heated quickly. Can do.

  Specifically, the reflecting member 230 is formed by curving, for example, an aluminum plate or the like having a large infrared and far-infrared reflectance and a thermal conductivity higher than that of a stay 240 described later, for example, an aluminum plate. . More specifically, the reflecting member 230 extends from the halogen lamp 210 outward in the front-rear direction from the reflecting portion 231 having a curved shape (substantially U-shaped in cross section) and both ends of the reflecting portion 231 on the nip plate 220 side. And a flange portion 232. Further, the reflecting member 230 is formed thinner than a stay 240 described later.

  The stay 240 is a member that supports both ends of the nip plate 220 in the front-rear direction from the side opposite to the pressure roller 140 and receives the force when a force is applied to the nip plate 220 from the pressure roller 140 side. is there. The stay 240 has a relatively high rigidity, for example, a metal plate such as a steel plate that has an opening on the nip plate 220 side and bends in a substantially U shape in cross section along the reflecting member 230 (reflecting portion 231). It is formed by.

  More specifically, the stay 240 includes an upper wall 241 disposed above the halogen lamp 210, a front wall 242 (first support portion) and a rear wall as an example of a support portion extending downward from the front and rear ends of the upper wall 241. 243 (second support portion).

  The front wall 242 is disposed upstream of the halogen lamp 210 in the transport direction of the paper S. The front wall 242 sandwiches the flange portion 232 on the front side of the reflecting member 230 with the nip plate 220 at the lower end thereof, and raises the front end portion (end portion of the front bent portion 222) of the nip plate 220 upward. I support from.

  The rear wall 243 is disposed downstream of the halogen lamp 210 in the transport direction of the paper S. The rear wall 243 sandwiches the flange 232 on the rear side of the reflecting member 230 between the rear wall 243 and the nip plate 220 at the lower end thereof, and the rear end portion (rear end portion of the base portion 221) of the nip plate 220. Support from above.

  In the present embodiment, the lower end portion of the front wall 242 is disposed upstream of the nip portion N in the transport direction of the paper S, and the lower end portion of the rear wall 243 is transported in the transport direction of the paper S from the nip portion N. It is arranged downstream.

  As shown in FIG. 5, a heat insulating material 250 is provided between the front wall 242 of the stay 240 and the nip plate 220, specifically between the front wall 242 and the flange portion 232 on the front side of the reflecting member 230. ing.

  The heat insulating material 250 is a resin tape. As this heat insulating material 250, the polyimide tape which is a resin tape excellent in heat resistance can be used, for example. As shown in FIG. 4B, the heat insulating material 250 is attached to the lower end portion of the front wall 242 from the left end portion to the right end portion, and covers the lower surface of the front wall 242 that is close to the reflecting member 230. .

  Accordingly, as shown in FIG. 5, the heat insulating material 250 is disposed so as to be sandwiched between the front wall 242 and the front flange portion 232, and the front wall 242 and the front flange portion 232 are not in direct contact with each other. ing.

  The heat insulating material 250 is desirably formed of a material or thickness having sufficient physical properties to suppress heat transfer between the front wall 242 and the front flange portion 232.

  The heat insulating material 250 is not provided between the rear wall 243 of the stay 240 and the nip plate 220, and the rear wall 243 is in contact with the flange portion 232 on the rear side of the reflecting member 230. That is, the heat insulating material 250 is provided between only one of the front wall 242 and the rear wall 243 of the stay 240 and the nip plate 220.

According to the fixing device 100 of the present embodiment configured as described above, the following operational effects can be obtained.
When the halogen lamp 210 is turned on, the nip plate 220 starts to receive heat due to the radiant heat from the halogen lamp 210.

  At this time, the reflective member 230 that is in contact with the nip plate 220 has high thermal conductivity and is thin and has a small heat capacity. However, the stay 240 has a lower thermal conductivity than the nip plate 220 and the reflecting member 230 and is not easily heated. Therefore, if the heat of the nip plate 220 easily moves to the stay 240, the stay 240 takes the heat of the nip plate 220 and the heating efficiency (temperature increase rate) of the nip plate 220 is deteriorated. In the present embodiment, since the heat insulating material 250 is provided between the front wall 242 of the stay 240 and the nip plate 220, the movement of the heat of the nip plate 220 to the stay 240 can be reduced. Thereby, the nip plate 220 can be quickly heated.

  When the sheet S or the fixing belt 110 enters the nip portion N because the heat insulating material 250 is provided between the nip plate 220 and the front wall 242 disposed upstream of the nip portion N in the transport direction. In addition, even if the heat of the nip plate 220 is taken away, the front wall 242 does not take away the heat of the nip plate 220, so the temperature drop of the nip plate 220 can be reduced.

  Further, when the halogen lamp 210 is turned off, the heat insulating material 250 is not provided between the rear wall 243 and the nip plate 220, so that the heat of the nip plate 220 easily moves to the rear wall 243. As described above, since the heat of the nip plate 220 can be released to the stay 240 when the nip plate 220 is cooled, the nip plate 220 can be quickly cooled.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment. About a concrete structure, it can change suitably in the range which does not deviate from the meaning of this invention.

  In the embodiment, the heat insulating material 250 is provided between the front wall 242 and the nip plate 220 of the stay 240 and is not provided between the rear wall 243 and the nip plate 220. However, the present invention is not limited thereto. Is not to be done. For example, as shown in FIG. 6, the heat insulating material 250 may be provided between the rear wall 243 and the nip plate 220 and may not be provided between the front wall 242 and the nip plate 220.

  Specifically, the heat insulating material 250 is attached to the lower end portion of the rear wall 243 and covers the lower surface of the rear wall 243. Thereby, the heat insulating material 250 is disposed between the rear wall 243 and the rear flange portion 232 of the reflecting member 230.

  Even with this configuration, as in the above embodiment, when the nip plate 220 is heated, the heat of the nip plate 220 can be reduced from moving to the stay 240, and when the nip plate 220 is cooled (halogen lamp). When 210 is turned OFF), the heat of the nip plate 220 can be released to the stay 240.

  In the embodiment, the heat insulating material 250 is provided between only one of the front wall 242 and the rear wall 243 (front wall 242) of the stay 240 and the nip plate 220. However, the present invention is limited to this. is not. For example, a heat insulating material having different heat insulating effects may be provided between the front wall 242 and the nip plate 220 and between the rear wall 243 and the nip plate 220.

  Specifically, as shown in FIG. 7, a first heat insulating material 251 is provided between the front wall 242 and the nip plate 220. A second heat insulating material 252 is provided between the rear wall 243 and the nip plate 220.

  The first heat insulating material 251 is attached to the lower end portion of the front wall 242, covers the lower surface of the front wall 242, and is disposed between the front wall 242 and the flange portion 232 on the front side of the reflecting member 230.

  The second heat insulating material 252 is attached to the lower end portion of the rear wall 243, covers the lower surface of the rear wall 243, and is disposed between the rear wall 243 and the flange portion 232 on the rear side of the reflecting member 230. The second heat insulating material 252 is formed of the same material as the first heat insulating material 251, but is thinner than the first heat insulating material 251, and has a rear wall 243 and a rear flange compared to the first heat insulating material 251. Heat transfer between the portions 232 is allowed.

  When configured in this manner, when the nip plate 220 is heated, the heat of the nip plate 220 can be reduced from moving to the front wall 242 and the rear wall 243 of the stay 240. Further, when the nip plate 220 is cooled, the heat of the nip plate 220 can be released from the rear wall 243 side to the stay 240.

  Note that the first heat insulating material and the second heat insulating material may be formed of materials having different heat insulating performance and may have the same thickness. For example, the first heat insulating material may be formed of a material having physical properties that are difficult to transmit heat, and the second heat insulating material may be formed of a material having physical properties that allow heat to be transmitted more easily than the material constituting the first heat insulating material. . Thus, even if it forms a 1st heat insulating material and a 2nd heat insulating material, a 1st heat insulating material and a 2nd heat insulating material have a different heat insulation effect.

  Further, the first heat insulating material and the second heat insulating material are formed with the same thickness by a material having the same heat insulating performance, and the second heat insulating material is an exposed area of the lower surface of the front wall 242 to which the first heat insulating material is attached. Instead, it may be formed in such a size that the exposed area of the lower surface of the rear wall 243 becomes larger. Even in such a case, the first heat insulating material and the second heat insulating material have different heat insulating effects.

  Moreover, in the said embodiment, although the heat insulating material 250 was arrange | positioned between the front wall 242 of the stay 240 and the flange part 232 of the front side of the reflection member 230, this invention is not limited to this. For example, the heat insulating material may be disposed between the nip plate 220 and the front flange portion 232, between the front wall 242 and the front flange portion 232, and between the front flange portion 232 and the nip plate 220. It may be arranged in both.

  Specifically, an example in which the heat insulating material is disposed between the nip plate 220 and the front flange portion 232 will be described with reference to FIG. The heat insulating material 260 is affixed to the reflecting member 230 so as to cover the lower surface of the front flange portion 232. Thereby, since the heat of the nip plate 220 can be reduced from moving to the flange portion 232, the heat of the nip plate 220 can be reduced from moving to the front wall 242 of the stay 240 that contacts the flange portion 232. Can do.

  Next, an example in which the heat insulating material is disposed between the front wall 242 and the front flange portion 232 and between the front flange portion 232 and the nip plate 220 will be described with reference to FIG. To do. The heat insulating material 270 is affixed by winding the end portion of the flange portion 232 so as to cover both the lower surface and the upper surface of the front flange portion 232. Accordingly, the heat of the nip plate 220 can be reduced from moving to the front flange portion 232, and the heat of the flange portion 232 can also be reduced to move to the front wall 242, so the heat of the nip plate 220 can be reduced. Moving to the front wall 242 can be further reduced.

  And in the said embodiment, the heat insulating material 250 is provided between the front wall 242 and the flange part 232 of the reflection member 230 by affixing the tape-shaped heat insulating material 250 to the lower end part of the front wall 242 of the stay 240. However, the present invention is not limited to this. For example, a paint-type heat insulating material may be applied to the lower end portion of the front wall 242, or a sheet-like heat insulating material may be fixed to the lower end portion of the front wall 242 with an adhesive or a double-sided tape.

  Moreover, in the said embodiment, although the heat insulating material 250 was formed with resin, this invention is not limited to this. For example, the heat insulating material may be formed from ceramics or various fibrous materials.

  In the above embodiment, the halogen lamp 210 is exemplified as the heating element, but the present invention is not limited to this, and may be a carbon heater, for example.

  In the embodiment, the plate-shaped nip plate 220 is exemplified as the nip member. However, the present invention is not limited to this, and for example, a thick member that is not plate-shaped may be employed.

  In the above embodiment, the pressure roller 140 is exemplified as the rotating body, but the present invention is not limited to this, and may be, for example, a belt-shaped pressure member.

  In the embodiment, the paper S such as plain paper or postcard is exemplified as the recording sheet. However, the present invention is not limited to this, and may be, for example, an OHP sheet.

DESCRIPTION OF SYMBOLS 1 Laser printer 100 Fixing device 110 Fixing belt 140 Pressure roller 210 Halogen lamp 220 Nip plate 230 Reflective member 232 Flange part 240 Stay 242 Front wall 243 Rear wall 250 Heat insulating material 251 First heat insulating material 252 Second heat insulating material S paper

Claims (8)

  1. A fixing device configured to thermally fix a developer image transferred to a recording sheet,
    A cylindrical fixing belt;
    A heating element disposed inside the fixing belt;
    A metal nip member that is disposed so that the inner surface of the fixing belt is in sliding contact with the heating element and is heated by the heating element;
    A rotating body that sandwiches the fixing belt with the nip member;
    A metal stay having a support portion that supports a side of the nip member opposite to the rotating body,
    The support portion includes a first support portion that supports the nip member on the upstream side in the conveyance direction of the recording sheet with respect to the heating element, and a second support that supports the nip member on the downstream side in the conveyance direction with respect to the heating element. And
    The nip member includes a base portion that is in sliding contact with the inner surface of the fixing belt and heated by the heating element, and a bent portion that is provided upstream of the base portion in the transport direction and bends away from the rotating body. Have
    The first support portion supports an edge that is a tip on the upstream side in the transport direction of the bent portion,
    A non-metallic heat insulating material is provided between the first support portion and the edge of the nip member, and a non-metallic heat insulating material is provided between the second support portion and the nip member. A fixing device which is not provided.
  2. The fixing device according to claim 1, wherein the second support portion supports an end portion of the base portion on the downstream side in the transport direction.
  3. The fixing device according to claim 1, wherein the first support portion is further away from the base portion than the second support portion.
  4.   The fixing device according to claim 1, wherein the nip member is made of a material having a higher thermal conductivity than the stay.
  5.   The fixing device according to claim 1, wherein the heat insulating material is made of polyimide.
  6. A reflective member formed to cover the heating element;
    The reflective member has a flange portion extending away from the heating element at an end portion on the nip member side,
    The fixing device according to claim 1 , wherein the flange portion is sandwiched between the nip member and the support portion.
  7. The fixing device according to claim 6 , wherein the heat insulating material is disposed between the nip member and the flange portion.
  8. The fixing device according to claim 6 , wherein the heat insulating material is disposed between the flange portion and the first support portion.
JP2012211845A 2012-09-26 2012-09-26 Fixing device Active JP6123203B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2012211845A JP6123203B2 (en) 2012-09-26 2012-09-26 Fixing device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2012211845A JP6123203B2 (en) 2012-09-26 2012-09-26 Fixing device
US14/018,788 US9063485B2 (en) 2012-09-26 2013-09-05 Fixing device
US14/745,789 US9195189B2 (en) 2012-09-26 2015-06-22 Fixing device

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JP2014066852A JP2014066852A (en) 2014-04-17
JP6123203B2 true JP6123203B2 (en) 2017-05-10

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Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003084602A (en) * 2001-09-11 2003-03-19 Canon Inc Fixing device
JP2004134211A (en) * 2002-10-10 2004-04-30 Canon Inc Heating device
JP2005259394A (en) * 2004-03-09 2005-09-22 Canon Finetech Inc Heating device and image formation device using it
JP5343811B2 (en) * 2009-10-30 2013-11-13 ブラザー工業株式会社 Fixing device
JP5515630B2 (en) * 2009-10-30 2014-06-11 ブラザー工業株式会社 Fixing device
JP6019996B2 (en) * 2012-09-26 2016-11-02 ブラザー工業株式会社 Fixing device

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