WO2014045750A1 - ベルト駆動装置及びそれを備えた定着装置並びに画像形成装置 - Google Patents
ベルト駆動装置及びそれを備えた定着装置並びに画像形成装置 Download PDFInfo
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- WO2014045750A1 WO2014045750A1 PCT/JP2013/071455 JP2013071455W WO2014045750A1 WO 2014045750 A1 WO2014045750 A1 WO 2014045750A1 JP 2013071455 W JP2013071455 W JP 2013071455W WO 2014045750 A1 WO2014045750 A1 WO 2014045750A1
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- belt
- roller
- elastic
- meandering
- fixing
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2053—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2017—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00135—Handling of parts of the apparatus
- G03G2215/00139—Belt
- G03G2215/00143—Meandering prevention
- G03G2215/00168—Meandering prevention by friction
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/20—Details of the fixing device or porcess
- G03G2215/2003—Structural features of the fixing device
- G03G2215/2016—Heating belt
- G03G2215/2025—Heating belt the fixing nip having a rotating belt support member opposing a pressure member
- G03G2215/2032—Heating belt the fixing nip having a rotating belt support member opposing a pressure member the belt further entrained around additional rotating belt support members
Definitions
- the present invention relates to a belt driving device that regulates meandering of an endless belt stretched between a driving roller and a driven roller in the roller axial direction, a fixing device including the belt driving device, and an image forming apparatus. .
- a toner image formed on an image carrier such as a photosensitive drum is transferred to a recording medium, and the recording medium carrying the toner image is conveyed toward a fixing device.
- the toner image on the recording medium is fixed to the recording medium by applying pressure.
- the fixing device includes a fixing belt that is rotatably stretched between a fixing roller and a heat roller, and a pressure roller that is pressed against the fixing belt, and the recording medium includes a fixing belt and a pressure roller.
- the fixing belt when a fixing belt stretched between rollers is rotated, the fixing belt may meander on the roller while moving in the roller axis direction.
- the fixing belt meanders there arises a problem of fixing failure such as the position of the toner image on the recording medium being shifted, and when the fixing belt meandering is continued, the end of the belt in the width direction is changed. There was a risk of damage.
- the fixing device is not limited to a belt fixing type, and is an endless shape stretched around a plurality of rollers including a driving roller such as an intermediate transfer belt to which a toner image is transferred and a conveyance belt that carries and conveys a recording medium. The same problem occurs in this belt.
- the belt driving device described in Patent Document 1 is provided with a pressure contact member that presses one end side in the width direction of the belt applied to the driving roller and the driven roller, so that the belt is shifted toward one end side. And the relative positional relationship of the driven roller is adjusted.
- the belt is rotating, the belt 12 gradually moves toward one end, and as the belt approaches, one end of the belt is pressed against the pressure contact member.
- the force that moves toward the other end of the belt gradually increases, and the force that is approached on both ends of the belt balances.
- the force applied to both ends of the belt is balanced, the movement of the belt in the width direction is stopped, and the meandering of the belt is restricted.
- the belt driving device described in Patent Document 2 is provided with a rib projecting annularly in the running direction of the belt at one end of the belt and a regulating member that can come into contact with the rib.
- the ribs provided on the belt abut against the regulating member to regulate the meandering of the belt.
- the belt driving device described in Patent Document 3 includes a belt stretched between a driving roller and a meandering correction roller, a meandering detection sensor that detects the meandering of the belt in contact with the end of the belt, and swings the meandering correction roller.
- a meandering correction cam that rotates by driving the motor, and a clutch that rotates the motor by the detection result of the meandering detection sensor.
- the meander detection sensor detects the meander of the belt
- the clutch is turned on, and the rotational force of the motor is transmitted to the meander correction cam.
- the meandering correction cam starts to rotate, and the meandering correction roller swings in a direction for correcting the meandering of the belt.
- Japanese Patent Laid-Open No. 5-132180 paragraphs [0020] to [0023], FIG. 1
- Japanese Unexamined Patent Publication No. 7-89629 paragraphs [0028] and [0029], FIG. 3
- Japanese Patent Laid-Open No. 5-297953 paragraphs [0013] to [0022], FIGS. 1 and 3)
- the belt driving device described in Patent Document 3 includes a detection sensor, a motor, a clutch, and a meandering correction mechanism for correcting the meandering of the belt, and the device becomes complicated and expensive.
- the present invention has been made to solve the above-described problems, and includes a belt driving device that stably regulates belt meandering for a long period of time with a low-cost and simple configuration, a fixing device including the belt driving device, and an image forming apparatus.
- the purpose is to provide.
- a first invention is a belt drive device that regulates meandering of an endless belt stretched between a drive roller and a driven roller in the roller axis direction, and the shaft of the driven roller
- the roller member is disposed at both ends of the belt and restricts the meandering of the belt in the roller axis direction.
- the roller member is fixed to the apparatus main body, and the roller member is rotatable to the shaft part.
- An elastic roller portion that is supported and contacts an end in the width direction of the belt by meandering of the belt, and a braking portion that is disposed between the support shaft portion and the elastic roller portion and brakes the rotation of the elastic roller portion.
- the elastic roller portion includes a side surface portion facing the end portion of the belt and an outer peripheral portion facing the outer peripheral surface of the driven roller with a predetermined gap therebetween, and the gap Is the thickness of the belt It is configured to be small, and by increasing the rotational load of the end of the belt that has entered the gap against the elastic force of the elastic roller portion by the braking force of the braking portion, It is characterized by regulating meandering.
- the belt meanders in the roller axis direction when the belt meanders in the roller axis direction, one end of the belt resists the elastic force of the elastic roller portion, and the outer peripheral surface of the driven roller and the outer peripheral portion of the elastic roller portion. Enter the gap between.
- the elastic roller portion rotates following the rotation of the belt.
- the elastic roller portion rotates while receiving a rotational load by the braking portion. Therefore, one end of the belt that contacts the elastic roller part is also subjected to the rotational load of the elastic roller part and the rotational speed is reduced, while the other end of the belt rotates at a higher speed than the one end.
- belt meandering can be regulated stably for a long period of time with an inexpensive and simple configuration in which roller members are disposed at both ends of the driven roller.
- FIG. 1 is a schematic diagram illustrating an overall configuration of an image forming apparatus including a belt driving device according to a first embodiment of the present invention.
- Side surface sectional drawing which shows the structure of a fixing device provided with the belt drive device which concerns on 1st Embodiment.
- the top view which shows the belt drive device provided with the roller member which concerns on 1st Embodiment.
- Sectional drawing which shows the roller member which concerns on 1st Embodiment Sectional drawing which shows the state which the edge part of the belt approached into the clearance gap in order to control the meandering of the belt which concerns on 1st Embodiment
- Sectional drawing which shows the roller member which concerns on 2nd Embodiment of this invention.
- Sectional drawing which shows the roller member which concerns on 3rd Embodiment of this invention.
- FIG. 1 is a diagram illustrating a configuration of an image forming apparatus including a belt driving device according to an embodiment of the present invention.
- the image forming apparatus 1 includes a sheet feeding unit 2 disposed in a lower portion thereof, a sheet conveying unit 3 disposed on a side of the sheet feeding unit 2, and an image forming unit disposed above the sheet conveying unit 3.
- the image forming unit 4, the fixing device 5 disposed on the discharge side in the paper conveyance direction from the image forming unit 4, and the image reading unit 6 disposed above the image forming unit 4 and the fixing device 5. .
- the paper feed unit 2 includes a plurality of paper feed cassettes 7 that store paper 9 that is a recording medium.
- the paper 9 is sent to the paper transport unit 3 one by one.
- the paper 9 sent to the paper transport unit 3 is transported toward the image forming unit 4 via the paper transport path 10 provided in the paper transport unit 3.
- the image forming unit 4 forms a toner image on a sheet 9 by an electrophotographic process.
- the image forming unit 4 is a photoconductor 11 supported so as to be rotatable in the direction of an arrow in FIG.
- a charging unit 12, an exposure unit 13, a developing unit 14, a transfer unit 15, a cleaning unit 16, and a charge eliminating unit 17 are provided.
- the charging unit 12 includes a charging wire to which a high voltage is applied.
- a predetermined potential is applied to the surface of the photoconductor 11 by corona discharge from the charging wire, the surface of the photoconductor 11 is uniformly charged.
- the surface potential of the photoconductor 11 is selectively attenuated, and the surface of the photoconductor 11 is irradiated. An electrostatic latent image is formed.
- the developing unit 14 develops the electrostatic latent image on the surface of the photoconductor 11, and a toner image is formed on the surface of the photoconductor 11.
- This toner image is transferred by the transfer unit 15 to the sheet 9 supplied between the photoconductor 11 and the transfer unit 15.
- the sheet 9 on which the toner image has been transferred is conveyed toward the fixing device 5 arranged downstream of the image forming unit 4 in the sheet conveying direction.
- the fixing device 5 the paper 9 is heated and pressurized, and the toner image is melted and fixed on the paper 9.
- the sheet 9 on which the toner image is fixed is discharged onto the discharge tray 21 by the discharge roller pair 20.
- the toner remaining on the surface of the photoconductor 11 is removed by the cleaning unit 16, and the residual charge on the surface of the photoconductor 11 is removed by the charge eliminating unit 17. Then, the photosensitive member 11 is charged again by the charging unit 12, and image formation is performed in the same manner.
- the fixing device 5 having a belt driving device is configured as shown in FIG.
- FIG. 2 is a side sectional view showing the configuration of the fixing device 5.
- the fixing device 5 includes a heating unit 18 and a pressure roller 19.
- the heating unit 18 includes an endless fixing belt 26, a fixing roller 23 included in the fixing belt 26, a heat roller 27 that stretches the fixing belt 26 together with the fixing roller 23, and a heating unit included in the heat roller 27.
- the heater 30 is provided.
- the belt driving device includes a fixing roller 23 that is a driving roller, a heat roller 27 that is a driven roller, a fixing belt 26 that is a belt stretched between the fixing roller 23 and the heat roller 27, and a roller member 40. .
- the pressure roller 19 is rotationally driven in the direction of the arrow in FIG. 2 by a drive source (not shown) such as a motor, and further pressurized with a predetermined pressure in the central axis direction of the fixing roller 23 by a pressure adjusting mechanism (not shown). Is done. As a result, the pressure roller 19 is pressed against the fixing roller 23 via the fixing belt 26, and the fixing belt 26 and the fixing roller 23 are rotated in the direction of the arrow in FIG. As the belt 26 rotates, the heat roller 27 is driven to rotate. A nip portion N is formed at a portion where the fixing belt 26 and the pressure roller 19 abut.
- the pressure roller 19 includes a cylindrical cored bar 19a, an elastic layer 19b formed on the cored bar 19a, and a release layer 19c that covers the surface of the elastic layer 19b.
- the fixing roller 23 has an elastic layer 23b on the core metal 23a.
- the elastic layer 23b stretches the fixing belt 26 and rotates integrally with the fixing belt 26.
- a coating such as Teflon (registered trademark) having good slidability is applied on the core metal. Yes.
- the fixing belt 26 is an endless heat-resistant belt, has an elastic layer made of silicone rubber or the like on the inner peripheral side, and is made of a fluororesin tube or the like on the outer peripheral side of the elastic layer to melt an unfixed toner image at the nip portion N. It has a release layer that improves the releasability when fixing.
- the fixing belt 26 When the fixing belt 26 is heated by the heater 30 via the heat roller 27 and rises to a predetermined temperature, the paper 9 sandwiched by the nip portion N is heated and is pressurized by the pressure roller 19. The powdery toner on the paper 9 is melted and fixed on the paper 9.
- the fixing belt 26 is made of a thin material having a good thermal conductivity and has a small heat capacity. Therefore, the fixing belt 26 can be warmed up in a short time and image formation is started quickly.
- the fixing belt 26 stretched between the fixing roller 23 and the heat roller 27 rotates, the fixing belt 26 moves in a roller axis direction (meandering) due to the inclination of the shaft centers of the fixing roller 23 and the heat roller 27.
- the roller member 40 restricts the meandering of the fixing belt 26 in the roller axial direction.
- FIG. 3 is a plan view showing the configuration of the belt driving device provided with the roller member 40.
- FIG. 4 is a cross-sectional view showing the roller member 40
- FIG. 5 is a cross-sectional view showing a state in which the end of the fixing belt 26 enters the gap in order to restrict the meandering of the fixing belt 26.
- 4 and 5 show the roller member 40 on the right side of the pair of roller members 40 and 40 in FIG.
- the pair of roller members 40, 40 are arranged so that the directions in the left-right direction are different from each other as shown in FIG.
- the pressure roller 19, the fixing roller 23, and the heat roller 27 are rotatably supported by the apparatus main body 5a of the fixing apparatus 5.
- roller members 40 and 40 are disposed at both ends of the heat roller 27 in the axial direction, and support shaft portions 41 that are fixed to the apparatus main body 5a, elastic roller portions 42, and powder 43 that is a braking portion (FIG. 4). Reference).
- the elastic roller portion 42 is formed in a cylindrical shape with an elastic material such as silicone rubber, and can be rotated on the support shaft portion 41 without moving in the axial direction with respect to the support shaft portion 41. Retained.
- the side surface portion 42 a of the elastic roller portion 42 is provided to face the end portion 26 a in the width direction of the fixing belt 26 (perpendicular to the traveling direction of the fixing belt 26).
- the elastic roller portion 42 is disposed with a gap in the width direction so that the side surface portion 42 a does not contact the end portion 26 a of the fixing belt 26.
- the outer peripheral portion 42 b of the elastic roller portion 42 is provided to face the outer peripheral surface of the heat roller 27 with a gap D therebetween.
- the gap D is configured to be slightly smaller than the thickness T of the fixing belt 26.
- the powder 43 is made of particles having a relatively small particle size such as sand, and is enclosed in a space formed by the outer peripheral surface of the support shaft portion 41 and the inner peripheral surface and both side surfaces of the elastic roller portion 42.
- the elastic roller portion 42 rotates relative to the support shaft portion 41.
- the rotational load of the elastic roller portion 42 is increased by the braking force (frictional force) of the powder 43. Note that the braking force of the powder 43 is changed by changing the amount and particle size of the powder 43 to be enclosed, and the rotational load of the elastic roller portion 42 with respect to the support shaft portion 41 can be changed.
- the end portion 26a of the fixing belt 26 enters the gap D against the elastic force of the elastic roller portion 42 as shown in FIG.
- the elastic roller portion 42 is driven to rotate as the fixing belt 26 rotates.
- the elastic roller portion 42 rotates while receiving a rotational load by the braking force of the powder 43 at the time of driven rotation. Accordingly, the rotation speed of the one end portion 26a of the fixing belt 26 that contacts the elastic roller portion 42 (the right end portion of the fixing belt 26 in FIG. 3) is also reduced due to the rotational load of the elastic roller portion 42.
- the other end 26a of the fixing belt 26 (the left end of the fixing belt 26 in FIG. 3) rotates at a higher speed than the one end 26a, and the fixing belt 26 moves to the other end 26a side. To do. That is, returning to the state of FIG. 4, the meandering of the fixing belt 26 is corrected.
- belt meandering can be stably controlled for a long period of time with an inexpensive and simple configuration in which the roller members 40 are disposed at both ends of the heat roller 27.
- FIG. 6 is a cross-sectional view showing a roller member 40 according to the second embodiment of the present invention.
- a chamfered portion is formed at the edge of the roller member 40 so that the end portion 26a of the fixing belt 26 can easily enter the gap D when the fixing belt 26 meanders.
- the roller member 40 different from the first embodiment will be mainly described, and the description of the same part as that of the first embodiment will be omitted.
- the roller member 40 includes a support shaft part 41 fixed to the apparatus main body 5a, an elastic roller part 42, and a powder 43.
- the elastic roller portion 42 is formed in a cylindrical shape with an elastic material such as silicone rubber, and is held by the support shaft portion 41 so as to be rotatable without moving in the axial direction with respect to the support shaft portion 41.
- the side surface portion 42 a of the elastic roller portion 42 is provided to face the end portion 26 a of the fixing belt 26.
- the outer peripheral portion 42 b of the elastic roller portion 42 faces the outer peripheral surface of the heat roller 27 with a gap D therebetween.
- An annular chamfered portion 42 c is formed at the edge between the side surface portion 42 a and the outer peripheral portion 42 b of the elastic roller portion 42.
- the gap D is configured to be slightly smaller than the thickness T of the fixing belt 26.
- the powder 43 is made of particles having a relatively small particle size such as sand, and is enclosed in a space formed by the outer peripheral surface of the support shaft portion 41 and the inner peripheral surface and both side surfaces of the elastic roller portion 42.
- the elastic roller portion 42 rotates relative to the support shaft portion 41.
- the rotational load of the elastic roller portion 42 is increased by the braking force of the powder 43.
- the end portion 26a of the fixing belt 26 contacts the chamfered portion 42c of the elastic roller portion 42 and resists the elastic force of the elastic roller portion 42. Enter the gap D.
- the elastic roller portion 42 is driven to rotate as the fixing belt 26 rotates.
- the elastic roller portion 42 rotates while receiving a rotational load by the braking force of the powder 43 at the time of driven rotation. Accordingly, the end portion 26a of the fixing belt 26 that contacts the elastic roller portion 42 (the right end portion of the fixing belt 26 in FIG.
- belt meandering can be stably controlled for a long period of time with an inexpensive and simple configuration in which the roller members 40 are disposed at both ends of the heat roller 27.
- FIG. 7 is a cross-sectional view showing a roller member 40 according to the third embodiment of the present invention.
- the outer peripheral portion 42b of the roller member 40 is formed in a tapered shape.
- the roller member 40 includes a support shaft part 41 fixed to the apparatus main body 5a, an elastic roller part 42, and a powder 43.
- the elastic roller portion 42 is formed in a cylindrical shape with an elastic material such as silicone rubber, and is held by the support shaft portion 41 so as to be rotatable without moving in the axial direction with respect to the support shaft portion 41.
- the side surface portion 42 a of the elastic roller portion 42 is provided to face the end portion 26 a of the fixing belt 26.
- the outer peripheral portion 42 b of the elastic roller portion 42 faces the outer peripheral surface of the heat roller 27 with a gap D therebetween.
- the outer peripheral portion 42b of the elastic roller portion 42 forms a gap D together with the outer peripheral surface of the heat roller 27 on the side surface portion 42a side, and the gap D is formed on the side surface portion 42a on the end side in the roller axial direction (right side in FIG. 7). It is formed in a tapered shape so as to be smaller than the side.
- the gap D is configured to be slightly smaller than the thickness T of the fixing belt 26.
- the fixing belt 26 moves (meanders) in the roller axis direction
- the end portion 26 a of the fixing belt 26 enters the gap D against the elastic force of the elastic roller portion 42.
- the contact pressure is increased by the tapered outer peripheral portion 42b and is reliably stopped at a predetermined position.
- the powder 43 is made of particles having a relatively small particle size such as sand, and is enclosed in a space formed by the outer peripheral surface of the support shaft portion 41 and the inner peripheral surface and both side surfaces of the elastic roller portion 42.
- the elastic roller portion 42 rotates relative to the support shaft portion 41.
- the rotational load of the elastic roller portion 42 is increased by the braking force of the powder 43.
- the end portion 26a of the fixing belt 26 enters the gap D against the elastic force of the elastic roller portion 42.
- the contact pressure is increased by the tapered outer peripheral portion 42b, and is reliably stopped at a predetermined position.
- the elastic roller portion 42 is driven to rotate as the fixing belt 26 rotates. At the time of driven rotation, the elastic roller portion 42 rotates while receiving a rotational load by the braking force of the powder 43.
- the end portion 26a of the fixing belt 26 that contacts the elastic roller portion 42 (the right end portion of the fixing belt 26 in FIG. 3) is also subjected to the rotational load of the elastic roller portion 42, and the rotation speed is lowered.
- the other end portion 26a of 26 (the left end portion of the fixing belt 26 in FIG. 3) rotates at a higher speed than the one end portion 26a, and the fixing belt 26 moves toward the other end portion 26a. That is, returning to the state of FIG. 7, the meandering of the fixing belt 26 is corrected.
- belt meandering can be stably controlled for a long period of time with an inexpensive and simple configuration in which the roller members 40 are disposed at both ends of the heat roller 27.
- the structure which formed the outer peripheral part 42b of the elastic roller part 42 in the taper shape was shown, this invention is not restricted to this,
- the outer peripheral part 42b and the side part 42a which were formed in the taper shape You may comprise so that the chamfer part 42c may be formed in the edge part.
- the end portion 26a of the fixing belt 26 is likely to enter the gap D, and reliably stops at a predetermined position of the gap D.
- the braking portion is configured by the powder 43 in the first to third embodiments.
- the present invention is not limited thereto, and the braking portion may be configured by a torque limiter. In this case, the same effect as the above embodiment can be obtained.
- the configuration using the heater 30 as the heating means is shown.
- the present invention is not limited to this, and the fixing belt 26 may be heated by electromagnetic induction.
- the present invention is not limited to this, and for example, an image forming apparatus for color.
- the present invention may be applied to an endless intermediate transfer belt to which toner images of respective color photoconductors are sequentially transferred, and an endless transport belt for carrying and transporting paper.
- the present embodiment may be appropriately applied to apparatuses other than the image forming apparatus according to the necessity and application.
- the present invention is used for a belt driving device that regulates meandering of an endless belt stretched between a driving roller and a driven roller in the roller axis direction, a fixing device including the belt driving device, and an image forming apparatus. Can do.
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Abstract
Description
図1は、本発明の実施形態に係るベルト駆動装置を備えた画像形成装置の構成を示す図である。画像形成装置1は、その下部に配設された給紙部2と、給紙部2の側方に配設された用紙搬送部3と、用紙搬送部3の上方に配設された画像形成部4と、画像形成部4よりも用紙搬送方向の排出側に配設された定着装置5と、画像形成部4及び定着装置5の上方に配設された画像読取部6とを備えている。
図6は、本発明の第2実施形態に係るコロ部材40を示す断面図である。第2実施形態は、コロ部材40の縁部に面取り部を形成して、定着ベルト26が蛇行した場合、定着ベルト26の端部26aが隙間Dへ進入し易くしたものである。以降の説明では、第1実施形態と異なるコロ部材40について主に説明し、第1実施形態と同じ部分の説明を省略する。
図7は、本発明の第3実施形態に係るコロ部材40を示す断面図である。第3実施形態は、コロ部材40の外周部42bをテーパー状に形成したものである。
Claims (6)
- 駆動ローラーと従動ローラーとに張架された無端状のベルトのローラー軸方向への蛇行を規制するベルト駆動装置であって、
前記従動ローラーの軸方向の両端部に配設され、前記ベルトのローラー軸方向への蛇行を規制するコロ部材を備え、
前記コロ部材は、装置本体に固定される支軸部と、該支軸部に回転可能に支持され前記ベルトの蛇行によって前記ベルトの幅方向の端部が接触する弾性ローラー部と、前記支軸部と前記弾性ローラー部との間に配設され前記弾性ローラー部の回転を制動する制動部と、を有し、
前記弾性ローラー部は、前記ベルトの端部に対向する側面部と、前記従動ローラーの外周面に所定の隙間を隔てて対向する外周部とを有してなり、
前記隙間は、前記ベルトの厚みより小さく構成されており、前記弾性ローラー部の弾性力に抗して前記隙間に進入した前記ベルトの端部の回転負荷を前記制動部の制動力によって増大させることで前記ベルトのローラー軸方向への蛇行を規制することを特徴とするベルト駆動装置。 - 前記制動部は、前記支軸部と前記弾性ローラー部との間に封入された粉体からなることを特徴とする請求項1に記載のベルト駆動装置。
- 前記外周部は、前記側面部から離間するにつれて前記隙間が小さくなるようにテーパー状に形成されることを特徴とする請求項1に記載のベルト駆動装置。
- 前記弾性ローラー部の前記側面部及び前記外周部の縁部には、環状の面取り部が形成されることを特徴とする請求項1に記載のベルト駆動装置。
- 請求項1に記載のベルト駆動装置を備えた定着装置であって、
前記ベルトは加熱手段によって加熱され、
前記駆動ローラーは前記ベルトを介して加圧ローラーに圧接され、
前記従動ローラーは前記駆動ローラーとともに前記ベルトを回転可能に張架してなり、
記録媒体を前記ベルトと前記加圧ローラーとの間で挟持して、記録媒体上の未定着トナー像を溶融定着することを特徴とする定着装置。 - 請求項5に記載の定着装置を備えた画像形成装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/385,912 US9229391B2 (en) | 2012-09-18 | 2013-08-08 | Belt drive device, anchoring device provided with same, and image forming device |
EP13839967.0A EP2902849B1 (en) | 2012-09-18 | 2013-08-08 | Belt drive device, anchoring device provided with same, and image forming device |
JP2014536671A JP5802839B2 (ja) | 2012-09-18 | 2013-08-08 | ベルト駆動装置及びそれを備えた定着装置並びに画像形成装置 |
CN201380015648.XA CN104220938B (zh) | 2012-09-18 | 2013-08-08 | 带驱动装置、装备它的定影装置以及图像形成装置 |
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JP2012-204135 | 2012-09-18 | ||
JP2012204135 | 2012-09-18 |
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PCT/JP2013/071455 WO2014045750A1 (ja) | 2012-09-18 | 2013-08-08 | ベルト駆動装置及びそれを備えた定着装置並びに画像形成装置 |
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US (1) | US9229391B2 (ja) |
EP (1) | EP2902849B1 (ja) |
JP (1) | JP5802839B2 (ja) |
CN (1) | CN104220938B (ja) |
WO (1) | WO2014045750A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2016148778A (ja) * | 2015-02-12 | 2016-08-18 | コニカミノルタ株式会社 | 定着装置及び画像形成装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6050844B2 (ja) * | 2015-01-30 | 2016-12-21 | 京セラドキュメントソリューションズ株式会社 | 定着装置及び該定着装置を備えた画像形成装置 |
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JPH05297953A (ja) | 1992-04-23 | 1993-11-12 | Fuji Xerox Co Ltd | 定着装置のベルト蛇行修正装置 |
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- 2013-08-08 CN CN201380015648.XA patent/CN104220938B/zh not_active Expired - Fee Related
- 2013-08-08 EP EP13839967.0A patent/EP2902849B1/en not_active Not-in-force
- 2013-08-08 WO PCT/JP2013/071455 patent/WO2014045750A1/ja active Application Filing
- 2013-08-08 US US14/385,912 patent/US9229391B2/en not_active Expired - Fee Related
- 2013-08-08 JP JP2014536671A patent/JP5802839B2/ja not_active Expired - Fee Related
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JPH0789629A (ja) | 1993-09-22 | 1995-04-04 | Canon Inc | ベルト部材の寄り規制装置、加熱装置、 及び画像形成装置 |
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Also Published As
Publication number | Publication date |
---|---|
JPWO2014045750A1 (ja) | 2016-08-18 |
EP2902849A1 (en) | 2015-08-05 |
CN104220938B (zh) | 2016-08-31 |
CN104220938A (zh) | 2014-12-17 |
US9229391B2 (en) | 2016-01-05 |
US20150050056A1 (en) | 2015-02-19 |
JP5802839B2 (ja) | 2015-11-04 |
EP2902849A4 (en) | 2016-06-08 |
EP2902849B1 (en) | 2017-08-02 |
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