JP6797508B2 - Belt transfer device, transfer device, and image forming device - Google Patents

Belt transfer device, transfer device, and image forming device Download PDF

Info

Publication number
JP6797508B2
JP6797508B2 JP2014204454A JP2014204454A JP6797508B2 JP 6797508 B2 JP6797508 B2 JP 6797508B2 JP 2014204454 A JP2014204454 A JP 2014204454A JP 2014204454 A JP2014204454 A JP 2014204454A JP 6797508 B2 JP6797508 B2 JP 6797508B2
Authority
JP
Japan
Prior art keywords
rotating member
beat
opposing roller
roller
belt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2014204454A
Other languages
Japanese (ja)
Other versions
JP2016075734A (en
Inventor
村上　進
進 村上
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to JP2014204454A priority Critical patent/JP6797508B2/en
Publication of JP2016075734A publication Critical patent/JP2016075734A/en
Application granted granted Critical
Publication of JP6797508B2 publication Critical patent/JP6797508B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Electrophotography Configuration And Component (AREA)
  • Electrostatic Charge, Transfer And Separation In Electrography (AREA)

Description

この発明は、表面が移動自在に構成された無端ベルトの蛇行を抑制するベルト搬送装置、転写装置、及び画像形成装置に関する。 The present invention relates to a belt transfer device, a transfer device, and an image forming device that suppress meandering of an endless belt having a movable surface.

画像形成装置が備える転写装置や定着装置の中には、中間転写ベルト、二次転写ベルト、及び定着ベルト等の無端ベルトを備えるものがある。このような無端ベルトの表面を移動させるベルト搬送装置として、無端ベルトを張架する互いに平行に配置された複数のローラを備えるものが知られている。無端ベルトは、製作誤差によるローラの外径のばらつきや、取付け誤差によるローラ間の平行度の狂い等によって、蛇行を生じる。特に画像形成装置では、無端ベルトの蛇行は画質に悪影響を与えるので、無端ベルトの蛇行をなるべく抑制することが重要である。 Some of the transfer devices and fixing devices included in the image forming device include endless belts such as an intermediate transfer belt, a secondary transfer belt, and a fixing belt. As a belt transport device for moving the surface of such an endless belt, a device including a plurality of rollers arranged in parallel with each other to stretch the endless belt is known. The endless belt causes meandering due to variations in the outer diameter of the rollers due to manufacturing errors and deviations in parallelism between the rollers due to mounting errors. Especially in an image forming apparatus, since the meandering of the endless belt adversely affects the image quality, it is important to suppress the meandering of the endless belt as much as possible.

無端ベルトの蛇行を抑制するために、ベルト搬送装置には、端部に凹部が形成されたローラと、無端ベルトの裏面に形成されたビートと、を備えるものがある（例えば、特許文献１参照。）。ベルト搬送装置では、ビートがローラの凹部に位置するように設けられているため、ベルトの蛇行が抑制される。 In order to suppress meandering of the endless belt, some belt conveyors include a roller having a recess formed at the end and a beat formed on the back surface of the endless belt (see, for example, Patent Document 1). .). In the belt transfer device, since the beat is provided so as to be located in the recess of the roller, the meandering of the belt is suppressed.

特開２０１０−００２４９０号公報Japanese Unexamined Patent Publication No. 2010-002490

しかしながら、ビートは、無端ベルト側の端部と無端ベルトとは反対側の端部とで周径が異なるため、無端ベルト側の端部と無端ベルトとは反対側の端部とで周速差が生じる。また、ビートの無端ベルト側の端部は、無端ベルトと同一の周速で循環移動する。このため、ビートの無端ベルト側の端部は、ローラと同一の周速で回転するが、ビートの無端ベルトとは反対側の端部は、ローラと周速差が生じる。このため、ビートは、ローラの凹部に当接した時に、無端ベルトとは反対側の端部とローラの凹部との間に摩擦力が生じて、摩耗することがある。 However, since the circumference of the beat differs between the end on the endless belt side and the end on the side opposite to the endless belt, the peripheral speed difference between the end on the endless belt side and the end on the opposite side to the endless belt. Occurs. Further, the end portion of the beat on the endless belt side circulates and moves at the same peripheral speed as the endless belt. Therefore, the end portion of the beat on the endless belt side rotates at the same peripheral speed as the roller, but the end portion on the opposite side of the beat endless belt has a peripheral speed difference from that of the roller. Therefore, when the beat comes into contact with the concave portion of the roller, a frictional force is generated between the end portion on the opposite side of the endless belt and the concave portion of the roller, and the beat may be worn.

この発明の目的は、ビートの摩耗を防止しつつ、無端ベルトの蛇行を抑制できるベルト搬送装置、転写装置、及び画像形成装置を提供することである。 An object of the present invention is to provide a belt transfer device, a transfer device, and an image forming device capable of suppressing meandering of an endless belt while preventing beat wear.

この発明のベルト搬送装置は、無端ベルト、ビート、及び独立回転部材を備える。無端ベルトは、対向ローラを含む回転自在な複数のローラによって張架され、表面が所定の移動方向に沿って循環移動自在に構成されている。ビートは、対向ローラに接触して無端ベルトの蛇行を抑制するために、無端ベルトの裏面の少なくとも第１端部に設けられている。独立回転部材は、対向ローラと同軸上で且つ対向ローラの少なくとも第１端部側の端部に設けられ、対向ローラに対して独立して回転する。 The belt transfer device of the present invention includes an endless belt, a beat, and an independently rotating member. The endless belt is stretched by a plurality of rotatable rollers including opposed rollers, and its surface is configured to be circulatory and movable along a predetermined moving direction. The beat is provided at least at the first end of the back surface of the endless belt in order to contact the opposing roller and suppress the meandering of the endless belt. The independent rotating member is provided coaxially with the opposing roller and at least at the end of the opposing roller on the first end side, and rotates independently of the opposing roller.

無端ベルトは、複数のローラの回転に伴って、表面が所定の移動方向に沿って循環移動する。無端ベルトの裏面に設けられたビートは、無端ベルト側の端部と無端ベルトとは反対側の端部とで周径が異なるため、異なる周速で循環移動する。すなわち、ビートの無端ベルト側の端部は、無端ベルトと同一の周速で循環移動するが、ビートの無端ベルトとは反対側の端部は、無端ベルトと異なる周速で循環移動する。また、独立回転部材は、対向ローラに対して独立して回転するため、ビートと接触時にビートの循環移動に伴って回転する。 The surface of the endless belt circulates along a predetermined movement direction as the plurality of rollers rotate. The beat provided on the back surface of the endless belt circulates at different peripheral speeds because the peripheral diameter differs between the end on the endless belt side and the end on the opposite side of the endless belt. That is, the end portion of the beat on the endless belt side circulates and moves at the same peripheral speed as the endless belt, but the end portion of the beat opposite to the endless belt circulates and moves at a peripheral speed different from that of the endless belt. Further, since the independent rotating member rotates independently of the opposing roller, it rotates with the circulating movement of the beat when it comes into contact with the beat.

また、独立回転部材及びビートの互いに対向する側面は、対向ローラの軸方向に対して直交することが好ましい。 Further, it is preferable that the side surfaces of the independent rotating member and the beat facing each other are orthogonal to the axial direction of the opposing roller.

独立回転部材は、ビートとの接触時に、ビートとの接触面積が大きくなるため、ビートの循環移動に伴って確実に回転できる。これにより、独立回転部材とビートとの間に周速差が生じないため、ベルト搬送装置は、ビートの摩耗を防ぎつつ、無端ベルトの蛇行を抑制できる。 Since the independent rotating member has a large contact area with the beat when it comes into contact with the beat, it can reliably rotate with the circulating movement of the beat. As a result, there is no difference in peripheral speed between the independent rotating member and the beat, so that the belt conveyor can suppress the meandering of the endless belt while preventing the beat from being worn.

また、独立回転部材は、対向ローラの軸方向から視て、対向ローラの直径よりも小さい直径の円形状を呈することが好ましい。独立回転部材は、無端ベルトに接触しないため、無端ベルトの回転の影響を受けずに、ビートとの接触により容易に回転できる。 Further, the independent rotating member preferably has a circular shape having a diameter smaller than the diameter of the opposing roller when viewed from the axial direction of the opposing roller. Since the independent rotating member does not come into contact with the endless belt, it can be easily rotated by contact with the beat without being affected by the rotation of the endless belt.

また、独立回転部材と対向ローラとの間には、低摩擦抵抗部材が設けられていることが好ましい。独立回転部材は、対向ローラの回転の影響を受けにくいため、ビートとの接触により容易に回転できる。 Further, it is preferable that a low friction resistance member is provided between the independent rotating member and the opposing roller. Since the independent rotating member is not easily affected by the rotation of the opposing roller, it can be easily rotated by contact with the beat.

また、独立回転部材と前記ビートとの間の摩擦抵抗は、前記独立回転部材と前記対向ローラとの間の摩擦抵抗よりも高いことが好ましい。独立回転部材は、ビートとの接触時に、ビートとの間の摩擦抵抗が対向ローラとの間の摩擦抵抗よりも高いため、ビートの循環移動に伴って確実に回転できる。 Further, the frictional resistance between the independent rotating member and the beat is preferably higher than the frictional resistance between the independent rotating member and the opposing roller. Since the frictional resistance between the independent rotating member and the beat is higher than the frictional resistance between the independent rotating member and the beat when it comes into contact with the beat, the independently rotating member can reliably rotate with the circulating movement of the beat.

また、無端ベルトを挟んで前記対向ローラに対向配置された押え部材をさらに備える構成において、押え部材は、無端ベルトの移動方向に直交する幅方向を基準として、無端ベルトの全域に当接することが好ましい。 Further, in a configuration further including a pressing member arranged to face the opposing roller with the endless belt sandwiched therein, the pressing member may come into contact with the entire area of the endless belt with reference to a width direction orthogonal to the moving direction of the endless belt. preferable.

押え部材は、無端ベルトの幅方向の全域に当接するため、無端ベルトの端部（すなわちビートが形成されている部分）が押え部材側に浮いて、独立回転部材及び対向ローラに乗り上げることを確実に防止できる。 Since the pressing member abuts on the entire width direction of the endless belt, it is ensured that the end portion of the endless belt (that is, the portion where the beat is formed) floats on the pressing member side and rides on the independent rotating member and the opposing roller. Can be prevented.

この発明の転写装置は、上述のベルト搬送装置を備え、像担持体上のトナー像を被転写体に転写する。押え部材は、無端ベルトである転写ベルトの表面を清掃するためのクリーニング部材である。転写装置は、クリーニング部材を押え部材として兼用できる。また、転写装置は、ビートの摩耗を防止できるため、装置の寿命を延ばすことができる。 The transfer device of the present invention includes the belt transfer device described above, and transfers a toner image on an image carrier to a transfer target. The pressing member is a cleaning member for cleaning the surface of the transfer belt, which is an endless belt. The transfer device can also use the cleaning member as a pressing member. In addition, the transfer device can prevent the beat from being worn, so that the life of the device can be extended.

この発明の画像形成装置は、トナー像を担持する像担持体、及び上述の転写装置を備える。画像形成装置は、転写装置の寿命が延びるため、メンテナンス時間を削減できる。 The image forming apparatus of the present invention includes an image carrier that supports a toner image and the above-mentioned transfer apparatus. Since the life of the transfer device is extended in the image forming apparatus, the maintenance time can be reduced.

この発明によれば、ビートの摩耗を防止しつつ、無端ベルトの蛇行を抑制できる。 According to the present invention, the meandering of the endless belt can be suppressed while preventing the wear of the beat.

第１実施形態に係る画像形成装置の画像形成処理に関する要部の構成を示す図である。It is a figure which shows the structure of the main part concerning the image formation process of the image forming apparatus which concerns on 1st Embodiment. 同画像形成装置の転写装置のクリーニングローラの近傍を示す模式図である。It is a schematic diagram which shows the vicinity of the cleaning roller of the transfer apparatus of the image forming apparatus. 第２実施形態に係る転写装置のクリーニングローラの近傍を示す模式図である。It is a schematic diagram which shows the neighborhood of the cleaning roller of the transfer apparatus which concerns on 2nd Embodiment. 第３実施形態に係る転写装置のクリーニングローラの近傍を示す模式図である。It is a schematic diagram which shows the neighborhood of the cleaning roller of the transfer apparatus which concerns on 3rd Embodiment. 第４実施形態に係る転写装置のクリーニングローラの近傍を示す模式図である。It is a schematic diagram which shows the neighborhood of the cleaning roller of the transfer apparatus which concerns on 4th Embodiment.

この発明の第１実施形態に係る画像形成装置について図を参照して説明する。画像形成装置１００は、一例として、図示しない外部装置から入力される画像データに基づいて、用紙に電子写真方式による単色の画像形成処理を行う。画像形成装置１００は、感光体ドラム１、及び転写装置２を備える。 The image forming apparatus according to the first embodiment of the present invention will be described with reference to the drawings. As an example, the image forming apparatus 100 performs a monochromatic image forming process on paper by an electrophotographic method based on image data input from an external device (not shown). The image forming apparatus 100 includes a photoconductor drum 1 and a transfer apparatus 2.

感光体ドラム（この発明の像担持体に相当する。）１は、画像データに基づく画像光が露光ユニット（不図示）によって照射され、表面に静電潜像が形成される。感光体ドラム１の表面には、静電潜像がトナーによって現像され、トナー像が形成される。 The photoconductor drum (corresponding to the image carrier of the present invention) 1 is irradiated with image light based on image data by an exposure unit (not shown), and an electrostatic latent image is formed on the surface. An electrostatic latent image is developed with toner on the surface of the photoconductor drum 1 to form a toner image.

転写装置（この発明のベルト搬送装置に相当する。）２は、転写ベルト（この発明の無端ベルトに相当する。）２１、駆動ローラ２２、転写ローラ２３、クリーニングローラ（この発明の押え部材に相当する。）２４、及び対向ローラ２５を備える。転写ベルト２１は、駆動ローラ２２、転写ローラ２３及び対向ローラ２５を含む複数のローラに張架され、駆動ローラ２２の回転に伴って所定の移動方向に沿って循環移動する。転写ベルト２１は、裏面に沿ってビート３が形成されている。駆動ローラ２２は、駆動源（不図示）に接続されており、駆動源からの駆動力の供給を受けて回転する。転写ローラ２３は、転写ベルト２１を挟んで感光体ドラム１に対向するように配置されている。クリーニングローラ２４は、転写ベルト２１の表面に当接する。対向ローラ２５は、転写ベルト２１を挟んでクリーニングローラ２４に対向するように配置されている。 The transfer device (corresponding to the belt transport device of the present invention) 2 includes a transfer belt (corresponding to the endless belt of the present invention) 21, a drive roller 22, a transfer roller 23, and a cleaning roller (corresponding to the holding member of the present invention). 24, and an opposing roller 25 are provided. The transfer belt 21 is stretched on a plurality of rollers including the drive roller 22, the transfer roller 23, and the opposing roller 25, and circulates and moves along a predetermined movement direction as the drive roller 22 rotates. A beat 3 is formed along the back surface of the transfer belt 21. The drive roller 22 is connected to a drive source (not shown) and rotates by receiving a drive force from the drive source. The transfer roller 23 is arranged so as to face the photoconductor drum 1 with the transfer belt 21 interposed therebetween. The cleaning roller 24 comes into contact with the surface of the transfer belt 21. The opposing roller 25 is arranged so as to face the cleaning roller 24 with the transfer belt 21 interposed therebetween.

転写装置２は、感光体ドラム１の表面のトナー像を、感光体ドラム１と転写ベルト２１との間の転写位置に搬送された用紙（この発明の被転写体に相当する。）へ転写する。トナー像が転写された用紙は、定着装置（不図示）によってトナー像が表面に堅牢に定着された後に、排紙トレイ（不図示）に排出される。また、転写ベルト２１の表面に付着したトナーや紙粉は、クリーニングローラ２４によって清掃される。 The transfer device 2 transfers the toner image on the surface of the photoconductor drum 1 to the paper (corresponding to the transferred body of the present invention) conveyed to the transfer position between the photoconductor drum 1 and the transfer belt 21. .. The paper on which the toner image is transferred is ejected to a paper ejection tray (not shown) after the toner image is firmly fixed to the surface by a fixing device (not shown). Further, the toner and paper dust adhering to the surface of the transfer belt 21 are cleaned by the cleaning roller 24.

図２に示すように、転写装置２は、転写ベルト２１、駆動ローラ２２、転写ローラ２３、クリーニングローラ２４、及び対向ローラ２５の他に、ビート３、及び独立回転部材４を備える。 As shown in FIG. 2, the transfer device 2 includes a beat 3 and an independent rotating member 4 in addition to a transfer belt 21, a drive roller 22, a transfer roller 23, a cleaning roller 24, and an opposing roller 25.

独立回転部材４は、対向ローラ２５の回転軸２５１と同軸上で且つ対向ローラ２５の両端部に設けられている。独立回転部材４は、対向ローラ２５の回転軸方向から視て、対向ローラ２５と同じ直径の円形状を呈する。独立回転部材４は、回転軸２５１の周面に摺接する円柱形状を呈し、対向ローラ２５に対して独立して回転する。 The independent rotating members 4 are provided coaxially with the rotating shaft 251 of the opposing roller 25 and at both ends of the opposing roller 25. The independent rotating member 4 exhibits a circular shape having the same diameter as the opposing roller 25 when viewed from the direction of the rotation axis of the opposing roller 25. The independent rotating member 4 has a cylindrical shape that is in sliding contact with the peripheral surface of the rotating shaft 251 and rotates independently of the opposing roller 25.

ビート３は、転写ベルト２１の裏面の両端部に形成されている。各ビート３の対向する側面の間の長さは、対向ローラ２５の回転軸方向を基準として、独立回転部材４の長さと対向ローラ２５の長さと独立回転部材４の長さとの合算値よりも僅かに長く形成されている。転写ベルト２１の循環移動時に、転写ベルト２１が対向ローラ２５の回転軸方向に沿って変位するため、ビート３は、独立回転部材４への接触と非接触とを行う。このようにして、ビート３は、独立回転部材４の外側面に接触して、転写ベルト２１の蛇行を抑制する。 Beats 3 are formed on both ends of the back surface of the transfer belt 21. The length between the opposing side surfaces of each beat 3 is larger than the total value of the length of the independent rotating member 4, the length of the opposing roller 25, and the length of the independent rotating member 4 with reference to the rotation axis direction of the opposing roller 25. It is formed slightly longer. Since the transfer belt 21 is displaced along the rotation axis direction of the opposing roller 25 during the circulation movement of the transfer belt 21, the beat 3 makes contact with and does not contact the independent rotating member 4. In this way, the beat 3 comes into contact with the outer surface of the independent rotating member 4 to suppress the meandering of the transfer belt 21.

以下に、転写ベルト２１の循環移動時における、独立回転部材４の回転速度及びビート３の摩耗について説明する。独立回転部材４は、転写ベルト２１に接触して対向ローラ２５に当接した状態で、ビート３への接触と非接触とを行うため、転写ベルト２１の循環移動（及び対向ローラ２５の回転）又はビート３の循環移動に伴って回転する。 The rotation speed of the independent rotating member 4 and the wear of the beat 3 during the circulation movement of the transfer belt 21 will be described below. Since the independent rotating member 4 makes contact with and does not contact the beat 3 in a state of being in contact with the transfer belt 21 and in contact with the opposing roller 25, the transfer belt 21 is circulated (and the rotation of the opposing roller 25). Or, it rotates with the cyclic movement of the beat 3.

ビート３は、転写ベルト２１側の端部と転写ベルト２１とは反対側の端部とで周径が異なるため、転写ベルト２１側の端部と転写ベルト２１とは反対側の端部とで周速差が生じる。すなわち、転写ベルト２１側の端部は、転写ベルト２１と同一の周速で移動するが、転写ベルト２１とは反対側の端部は、転写ベルト２１と異なる周速で移動する。 Since the circumference of the beat 3 differs between the end on the transfer belt 21 side and the end on the side opposite to the transfer belt 21, the end on the transfer belt 21 side and the end on the opposite side of the transfer belt 21 There is a difference in peripheral speed. That is, the end on the transfer belt 21 side moves at the same peripheral speed as the transfer belt 21, but the end on the opposite side of the transfer belt 21 moves at a peripheral speed different from that of the transfer belt 21.

また、ビート３は、転写ベルト２１及び対向ローラ２５よりも高摩擦な素材で形成されている。すなわち、ビート３と独立回転部材４との間に生じる摩擦抵抗は、転写ベルト２１と独立回転部材４との間に生じる摩擦抵抗、及び対向ローラ２５と独立回転部材４との間に生じる摩擦抵抗よりも大きくなる。 Further, the beat 3 is made of a material having higher friction than the transfer belt 21 and the opposing roller 25. That is, the frictional resistance generated between the beat 3 and the independent rotating member 4 is the frictional resistance generated between the transfer belt 21 and the independent rotating member 4, and the frictional resistance generated between the opposing roller 25 and the independent rotating member 4. Will be larger than.

なお、ビート３と独立回転部材４との間に生じる摩擦抵抗は、対向ローラ２５と独立回転部材４との間に生じる摩擦抵抗よりも大きくなるように構成されればよい。このため、ビート３を対向ローラ２５よりも高摩擦な素材で形成する代わりに、独立回転部材４のビート３側の側面の径を対向ローラ２５側の側面の径よりも大きくしてもよい。 The frictional resistance generated between the beat 3 and the independent rotating member 4 may be larger than the frictional resistance generated between the opposing roller 25 and the independent rotating member 4. Therefore, instead of forming the beat 3 with a material having a higher friction than the opposing roller 25, the diameter of the side surface of the independent rotating member 4 on the beat 3 side may be larger than the diameter of the side surface on the opposing roller 25 side.

以上より、独立回転部材４は、ビート３との非接触時に、転写ベルト２１の循環移動及び対向ローラ２５の回転に伴って対向ローラ２５と同一速度で回転する。この時、ビート３は、独立回転部材４に接触しないため、摩耗しない。また、独立回転部材４は、ビート３との接触時に、ビート３の循環移動に伴って対向ローラ２５とは異なる速度で回転する。この時、ビート３は、自身の循環移動に伴って独立回転部材４が回転するため、独立回転部材４との間に摩擦が生じず、摩耗を防止できる。 From the above, the independent rotating member 4 rotates at the same speed as the opposing roller 25 as the transfer belt 21 circulates and the opposing roller 25 rotates when it is not in contact with the beat 3. At this time, since the beat 3 does not come into contact with the independent rotating member 4, it does not wear. Further, when the independent rotating member 4 comes into contact with the beat 3, the independent rotating member 4 rotates at a speed different from that of the opposing roller 25 as the beat 3 circulates. At this time, since the independent rotating member 4 rotates with the circulation movement of the beat 3, friction with the independent rotating member 4 does not occur, and wear can be prevented.

これにより、転写装置２は、ビート３の摩耗を防止しつつ、転写ベルト２１の蛇行を抑制できる。転写装置２は、ビート３が摩耗しないため、装置の寿命を延ばすことができる。この結果、画像形成装置１００は、転写装置２の交換頻度が削減するため、メンテナンス時間を削減できる。 As a result, the transfer device 2 can suppress the meandering of the transfer belt 21 while preventing the beat 3 from being worn. Since the beat 3 is not worn by the transfer device 2, the life of the device can be extended. As a result, the image forming apparatus 100 can reduce the maintenance time because the frequency of exchanging the transfer apparatus 2 is reduced.

また、転写ベルト２１の表面に当接するクリーニングローラ２４は、転写ベルト２１を挟んで対向ローラ２５及び独立回転部材４に対向配置され、転写ベルト２１を対向ローラ２５及び独立回転部材４の一部に圧接する。クリーニングローラ２４の長さは、回転軸方向を基準として、転写ベルト２１の各ビート３の対向する側面の間の長さよりも短ければよい。クリーニングローラ２４の長さは、一例として、対向ローラ２５の長さより長く、対向ローラ２５の長さと独立回転部材４の長さを合算した長さより短い。 Further, the cleaning roller 24 that comes into contact with the surface of the transfer belt 21 is arranged to face the opposing roller 25 and the independent rotating member 4 with the transfer belt 21 interposed therebetween, and the transfer belt 21 is placed on the opposing roller 25 and a part of the independent rotating member 4. Press contact. The length of the cleaning roller 24 may be shorter than the length between the opposite side surfaces of each beat 3 of the transfer belt 21 with reference to the rotation axis direction. As an example, the length of the cleaning roller 24 is longer than the length of the opposing roller 25 and shorter than the total length of the opposing roller 25 and the independent rotating member 4.

これにより、転写装置２は、転写ベルト２１の循環移動時に、ビート３が独立回転部材４に乗り上がることを抑制できる。また、転写装置２は、ビート３を対向ローラ２５側に圧接しないので、ビート３を対向ローラ２５側に圧接する場合よりも、ビート３の摩耗を抑制できる。 As a result, the transfer device 2 can prevent the beat 3 from riding on the independent rotating member 4 when the transfer belt 21 is circulated. Further, since the transfer device 2 does not press-contact the beat 3 to the opposing roller 25 side, wear of the beat 3 can be suppressed as compared with the case where the beat 3 is pressed against the opposing roller 25 side.

さらに、ビート３及び独立回転部材４の互いに対向する側面は、対向ローラ２５の回転軸方向に対して直交するように形成されている。なお、ビート３及び独立回転部材４の互いに対向する側面が対向ローラ２５の回転軸方向に対して直交する構成には、ビート３及び独立回転部材４の互いに対向する側面が対向ローラ２５の回転軸方向に対して同一方向に向かって僅かに傾斜している構成も含まれる。これにより、独立回転部材４は、ビート３との接触時に、ビート３との接触面積が大きくなるため、ビート３の循環移動に伴って確実に回転できる。 Further, the side surfaces of the beat 3 and the independent rotating member 4 facing each other are formed so as to be orthogonal to the rotation axis direction of the opposing roller 25. In the configuration in which the side surfaces of the beat 3 and the independent rotating member 4 facing each other are orthogonal to the rotation axis direction of the opposing roller 25, the side surfaces of the beat 3 and the independent rotating member 4 facing each other are the rotating shafts of the opposing roller 25. A configuration that is slightly inclined toward the same direction with respect to the direction is also included. As a result, the independent rotating member 4 has a large contact area with the beat 3 when it comes into contact with the beat 3, so that the independent rotating member 4 can reliably rotate with the circulating movement of the beat 3.

上述の実施形態では、転写ベルト２１の裏面の両端部にビート３を設け、対向ローラ２５の両端部に独立回転部材４を設けたが、転写ベルト２１の裏面の第１端部にビート３を設け、対向ローラ２５の第１端部側の端部に独立回転部材４を設けてもよい。ビート３及び独立回転部材４を各々１つ設ける場合は、対向ローラ２５の回転軸２５１を僅かに傾けてフレーム（不図示）に取り付けて、転写ベルト２１を第１端部の反対側に移動させる。そして、ビート３が独立回転部材４に当接した状態で、転写ベルト２１の循環移動を開始する。転写ベルト２１の循環移動時に、ビート３は、独立回転部材４に接触した際の衝撃によって独立回転部材４から離れ、対向ローラ２５の回転軸２５１の傾斜により独立回転部材４に接触するため、独立回転部材４への接触と非接触を行う。この結果、転写装置２は、ビート３の摩耗を防止しつつ、転写ベルト２１の蛇行を抑制できる。 In the above-described embodiment, the beats 3 are provided at both ends of the back surface of the transfer belt 21, and the independent rotating members 4 are provided at both ends of the opposing roller 25. However, the beat 3 is provided at the first end of the back surface of the transfer belt 21. The independent rotating member 4 may be provided at the end of the opposing roller 25 on the first end side. When one beat 3 and one independent rotating member 4 are provided, the rotating shaft 251 of the opposing roller 25 is slightly tilted and attached to the frame (not shown) to move the transfer belt 21 to the opposite side of the first end portion. .. Then, in a state where the beat 3 is in contact with the independent rotating member 4, the transfer belt 21 starts the circulation movement. During the circulation movement of the transfer belt 21, the beat 3 separates from the independent rotating member 4 due to the impact when it comes into contact with the independent rotating member 4, and comes into contact with the independent rotating member 4 due to the inclination of the rotating shaft 251 of the opposing roller 25. Contact and non-contact with the rotating member 4. As a result, the transfer device 2 can suppress the meandering of the transfer belt 21 while preventing the beat 3 from being worn.

また、転写ベルト２１の表面にクリーニングローラ２４を当接させたが、クリーニングローラ２４に限らず、クリーニングブレードやクリーニングウェブでもよく、対向ローラ２５に転写ベルト２１を圧接させる押え部材であればよい。 Further, although the cleaning roller 24 is brought into contact with the surface of the transfer belt 21, the cleaning roller 24 is not limited to the cleaning roller 24, but may be a cleaning blade or a cleaning web, and may be a pressing member that presses the transfer belt 21 against the opposing roller 25.

また、押え部材は、必須の構成ではなく、例えば、駆動ローラ２２の少なくとも一方の端部に独立回転部材４を設ければ良い。駆動ローラ２２の端部に独立回転部材４を設けた構成においても、独立回転部材４は、ビート３と接触時に、ビート３の循環移動に伴って駆動ローラ２２とは独立して回転する。このため、ビート３は、独立回転部材４との間に摩擦が生じず、摩耗を防止できる。 Further, the pressing member is not an essential configuration, and for example, the independent rotating member 4 may be provided at at least one end of the drive roller 22. Even in the configuration in which the independent rotating member 4 is provided at the end of the drive roller 22, the independent rotating member 4 rotates independently of the drive roller 22 as the beat 3 circulates when it comes into contact with the beat 3. Therefore, the beat 3 does not cause friction with the independent rotating member 4, and wear can be prevented.

第２実施形態に係る転写装置２Ａについて図３を参照して説明する。転写装置２Ａは、クリーニングローラ２４Ａの長さが第１実施形態に係る転写装置２と相違する。以下に相違点についてのみ説明する。 The transfer device 2A according to the second embodiment will be described with reference to FIG. The length of the cleaning roller 24A of the transfer device 2A is different from that of the transfer device 2 according to the first embodiment. Only the differences will be described below.

クリーニングローラ２４Ａの長さは、回転軸方向を基準として、転写ベルト２１の長さ以上である。すなわち、クリーニングローラ２４Ａは、回転軸方向を基準として（すなわち転写ベルト２１の移動方向に直交する幅方向を基準として）、転写ベルト２１の全域に当接する。これにより、転写装置２Ａは、転写ベルト２１の循環移動時に、ビート３が独立回転部材４に乗り上がることを確実に防止できる。また、転写装置２Ａは、ビート３を対向ローラ側に圧接するが、独立回転部材４がビート３の循環移動に伴って回転するため、ビート３の摩耗を防止できる。 The length of the cleaning roller 24A is equal to or longer than the length of the transfer belt 21 with reference to the direction of the rotation axis. That is, the cleaning roller 24A comes into contact with the entire area of the transfer belt 21 with reference to the rotation axis direction (that is, with reference to the width direction orthogonal to the moving direction of the transfer belt 21). As a result, the transfer device 2A can reliably prevent the beat 3 from riding on the independent rotating member 4 when the transfer belt 21 is circulated. Further, although the transfer device 2A presses the beat 3 against the opposing roller side, the independent rotating member 4 rotates with the circulating movement of the beat 3, so that the beat 3 can be prevented from being worn.

第３実施形態に係る転写装置２Ｂについて図４を参照して説明する。転写装置２Ｂは、独立回転部材４Ｂの直径の長さが第２実施形態に係る転写装置２Ａと相違する。以下に相違点についてのみ説明する。 The transfer device 2B according to the third embodiment will be described with reference to FIG. The transfer device 2B differs from the transfer device 2A according to the second embodiment in the length of the diameter of the independent rotating member 4B. Only the differences will be described below.

独立回転部材４Ｂの直径は、対向ローラ２５の回転軸方向から視て、対向ローラ２５の直径よりも短く形成されている。このため、独立回転部材４Ｂは、転写ベルト２１に接触しない。これにより、独立回転部材４Ｂは、転写ベルト２１の循環移動の影響を受けずに、ビート３との接触により容易に回転できる。 The diameter of the independent rotating member 4B is formed to be shorter than the diameter of the opposing roller 25 when viewed from the rotation axis direction of the opposing roller 25. Therefore, the independent rotating member 4B does not come into contact with the transfer belt 21. As a result, the independent rotating member 4B can be easily rotated by contact with the beat 3 without being affected by the circulating movement of the transfer belt 21.

第４実施形態に係る転写装置２Ｃについて図５を参照して説明する。転写装置２Ｃは、低摩擦抵抗部材５を備える点で第２実施形態に係る転写装置２Ａと相違する。以下に相違点についてのみ説明する。 The transfer device 2C according to the fourth embodiment will be described with reference to FIG. The transfer device 2C is different from the transfer device 2A according to the second embodiment in that the transfer device 2C includes the low friction resistance member 5. Only the differences will be described below.

独立回転部材４と対向ローラ２５との間には、対向ローラ２５の回転軸２５１と同軸上に低摩擦抵抗部材５が設けられている。低摩擦抵抗部材５には、一例として、摩擦係数が小さい高摺動の部材であるポリスライダー（登録商標）が用いられる。すなわち、ビート３と独立回転部材４との間に生じる摩擦抵抗は、対向ローラ２５と独立回転部材４との間に生じる摩擦抵抗よりもより大きくなる。これにより、独立回転部材４は、対向ローラ２５の回転の影響を受けにくいため、ビート３との接触により容易に回転できる。 A low friction resistance member 5 is provided between the independent rotating member 4 and the opposing roller 25 coaxially with the rotating shaft 251 of the opposing roller 25. As an example, the low friction resistance member 5 uses a polyslider (registered trademark) which is a highly sliding member having a small friction coefficient. That is, the frictional resistance generated between the beat 3 and the independent rotating member 4 is larger than the frictional resistance generated between the opposing roller 25 and the independent rotating member 4. As a result, the independent rotating member 4 is not easily affected by the rotation of the opposing roller 25, and thus can be easily rotated by contact with the beat 3.

なお、転写装置は、第１〜第４実施形態の構成を組み合わせてもよい。例えば、第３実施形態に係る転写装置２Ｂが低摩擦抵抗部材５をさらに備えてもよい。 The transfer device may be combined with the configurations of the first to fourth embodiments. For example, the transfer device 2B according to the third embodiment may further include a low friction resistance member 5.

また、この発明の転写装置２，２Ａ，２Ｂ，２Ｃの構成は、無端ベルトを備えるベルト搬送装置に適用できる。具体的には、感光体ドラム上の像担持体を中間転写ベルトに一次転写する一次転写装置と、中間転写ベルトと二次転写ベルトの間を通過する用紙に二次転写する二次転写装置と、を備える画像形成装置において、転写装置２，２Ａ，２Ｂ，２Ｃの構成は、中間転写ベルトを備える一次転写装置、及び二次転写ベルトを備える二次転写装置に適用できる。さらに、転写装置２，２Ａ，２Ｂ，２Ｃの構成は、定着ベルトを備える定着装置に適用できる。 Further, the configurations of the transfer devices 2, 2A, 2B, and 2C of the present invention can be applied to a belt transfer device including an endless belt. Specifically, a primary transfer device that first transfers the image carrier on the photoconductor drum to the intermediate transfer belt, and a secondary transfer device that secondarily transfers the image carrier on the paper passing between the intermediate transfer belt and the secondary transfer belt. In the image forming apparatus including, the configurations of the transfer devices 2, 2A, 2B, 2C can be applied to a primary transfer device including an intermediate transfer belt and a secondary transfer device including a secondary transfer belt. Further, the configurations of the transfer devices 2, 2A, 2B and 2C can be applied to a fixing device provided with a fixing belt.

上述の実施形態の説明は、すべての点で例示であって、制限的なものではないと考えられるべきである。本発明の範囲は、上述の実施形態ではなく、特許請求の範囲によって示される。さらに、本発明の範囲には、特許請求の範囲と均等の意味及び範囲内でのすべての変更が含まれることが意図される。 The description of the embodiments described above should be considered exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of claims, not by the above-described embodiment. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope equivalent to the claims.

２，２Ａ，２Ｂ，２Ｃ…転写装置
３…ビート
４，４Ｂ…独立回転部材
２１…転写ベルト
２４，２４Ａ…クリーニングローラ
２５…対向ローラ 2,2A, 2B, 2C ... Transfer device 3 ... Beat 4, 4B ... Independent rotating member 21 ... Transfer belt 24, 24A ... Cleaning roller 25 ... Opposing roller

Claims (6)

対向ローラを含む回転自在な複数のローラによって張架され、前記対向ローラの軸と直交する移動方向に沿って循環移動自在に構成された無端ベルトと、
前記対向ローラと同軸上で且つ前記対向ローラの少なくとも一端側の端部に設けられ、前記対向ローラに対して独立して回転する円柱状の独立回転部材と、
前記無端ベルトの裏面で前記一端側と同一側の端部に沿って突条に設けられ、かつ前記対向ローラの軸の中央側となる側面が前記独立回転部材の外側となる側面と対向する位置になるようにされたビートと、
前記無端ベルトを挟んで前記対向ローラに対向配置された押え部材とを備え、
前記独立回転部材及び前記ビートの互いに対向する側面は、前記対向ローラの軸方向に対して直交し、
前記独立回転部材と前記ビートとの間の摩擦抵抗は、前記独立回転部材と前記対向ローラとの間の摩擦抵抗よりも高く、
前記押え部材は、前記対向ローラの軸方向において、前記対向ローラの全域及び前記独立回転部材の一部のみに対して対向配置されたベルト搬送装置。 An endless belt stretched by a plurality of rotatable rollers including an opposing roller and circulated and movable along a moving direction orthogonal to the axis of the opposing roller.
A columnar independent rotating member coaxial with the opposing roller and provided at at least one end of the opposing roller and rotating independently of the opposing roller.
A position where the back surface of the endless belt is provided on the ridge along the end portion on the same side as the one end side, and the side surface on the central side of the shaft of the opposing roller faces the outer side surface of the independent rotating member. With the beat that was made to be
A pressing member arranged to face the facing roller with the endless belt sandwiched therein is provided.
The sides of the independent rotating member and the beat facing each other are orthogonal to the axial direction of the opposing roller.
The frictional resistance between the independent rotating member and the beat is higher than the frictional resistance between the independent rotating member and the opposing roller.
The pressing member, the opposed roller Te axial odor, the counter roller entire and the independent rotation only oppositely disposed belt conveying device for the part of the member. 前記独立回転部材は、前記対向ローラの軸方向から視て、前記対向ローラの直径よりも小さい直径の円形状を呈する請求項１に記載のベルト搬送装置。 The belt transport device according to claim 1, wherein the independent rotating member has a circular shape having a diameter smaller than the diameter of the opposing roller when viewed from the axial direction of the opposing roller. 前記独立回転部材と前記対向ローラとの間には、低摩擦抵抗部材が設けられている請求項１又は請求項２に記載のベルト搬送装置。 The belt transport device according to claim 1 or 2, wherein a low friction resistance member is provided between the independent rotating member and the opposing roller. 像担持体上のトナー像を被転写体に転写する転写装置において、
請求項１〜請求項３の何れかに記載のベルト搬送装置を備える転写装置。 In a transfer device that transfers a toner image on an image carrier to a transfer target
A transfer device including the belt transfer device according to any one of claims 1 to 3. 像担持体上のトナー像を被転写体に転写する転写装置において、
請求項１に記載のベルト搬送装置を備え、
前記押え部材は、前記無端ベルトの表面を清掃するためのクリーニング部材である転写装置。 In a transfer device that transfers a toner image on an image carrier to a transfer target
The belt transport device according to claim 1 is provided.
The pressing member, the cleaning member is a transfer device for cleaning the surface of said endless belts. トナー像を担持する像担持体と、
請求項４又は請求項５に記載の転写装置と、を備える画像形成装置。 An image carrier that supports a toner image and
An image forming apparatus comprising the transfer apparatus according to claim 4 or 5.
JP2014204454A 2014-10-03 2014-10-03 Belt transfer device, transfer device, and image forming device Active JP6797508B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2014204454A JP6797508B2 (en) 2014-10-03 2014-10-03 Belt transfer device, transfer device, and image forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014204454A JP6797508B2 (en) 2014-10-03 2014-10-03 Belt transfer device, transfer device, and image forming device

Publications (2)

Publication Number Publication Date
JP2016075734A JP2016075734A (en) 2016-05-12
JP6797508B2 true JP6797508B2 (en) 2020-12-09

Family

ID=55951340

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2014204454A Active JP6797508B2 (en) 2014-10-03 2014-10-03 Belt transfer device, transfer device, and image forming device

Country Status (1)

Country Link
JP (1) JP6797508B2 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3489585B1 (en) * 2003-07-22 2004-01-19 富士ゼロックス株式会社 Image forming apparatus using endless belt
KR100644649B1 (en) * 2004-11-13 2006-11-15 삼성전자주식회사 Image forming apparatus
JP4968279B2 (en) * 2009-03-24 2012-07-04 富士ゼロックス株式会社 Image forming apparatus
JP5610837B2 (en) * 2010-05-10 2014-10-22 キヤノン株式会社 Image forming apparatus

Also Published As

Publication number Publication date
JP2016075734A (en) 2016-05-12

Similar Documents

Publication Publication Date Title
JP5948506B2 (en) Fixing apparatus and image forming apparatus
JP6501061B2 (en) Image forming apparatus and cooling device
JP2016050976A (en) Image formation device
JP6347648B2 (en) Image forming apparatus
JP6292474B2 (en) Belt device and image forming apparatus having the same
US20170129725A1 (en) Transporting device, transporting system, and image forming apparatus
JP6797508B2 (en) Belt transfer device, transfer device, and image forming device
JP2019061139A (en) Belt conveying device or image forming apparatus
JP6828109B2 (en) Image forming device
JP6020683B2 (en) Fixing apparatus and image forming apparatus
JP6303464B2 (en) Fixing apparatus and image forming apparatus
JP2015203845A (en) Fixing apparatus and image forming apparatus
JP2015106091A (en) Transfer unit and image forming apparatus
JP2024006650A (en) Belt unit and image forming apparatus
US20110299896A1 (en) Oil application roller, fixing apparatus and image forming apparatus
JP6520258B2 (en) Fixing device and image forming apparatus
JP2014222329A (en) Belt conveyance device and image forming apparatus
JP6003747B2 (en) Image forming apparatus
JP7390565B2 (en) Band drive device, transfer device, and image forming device
JP7172357B2 (en) Fixing device and image forming device
JP6118742B2 (en) Fixing apparatus and image forming apparatus
JP6945792B2 (en) Toner image forming device, charging device, and image forming device
JP6638433B2 (en) Charging device and image forming apparatus provided with the charging device
JP6618282B2 (en) Image forming apparatus
JP2016224227A5 (en)

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20170925

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20180523

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20180626

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20180823

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20190108

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20190307

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20190618

C60 Trial request (containing other claim documents, opposition documents)

Free format text: JAPANESE INTERMEDIATE CODE: C60

Effective date: 20190913

C22 Notice of designation (change) of administrative judge

Free format text: JAPANESE INTERMEDIATE CODE: C22

Effective date: 20200212

C22 Notice of designation (change) of administrative judge

Free format text: JAPANESE INTERMEDIATE CODE: C22

Effective date: 20200407

C22 Notice of designation (change) of administrative judge

Free format text: JAPANESE INTERMEDIATE CODE: C22

Effective date: 20200414

C13 Notice of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: C13

Effective date: 20200602

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20200727

C23 Notice of termination of proceedings

Free format text: JAPANESE INTERMEDIATE CODE: C23

Effective date: 20200929

C03 Trial/appeal decision taken

Free format text: JAPANESE INTERMEDIATE CODE: C03

Effective date: 20201104

C30A Notification sent

Free format text: JAPANESE INTERMEDIATE CODE: C3012

Effective date: 20201104

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20201118

R150 Certificate of patent or registration of utility model

Ref document number: 6797508

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150