JPH0551147A - Sheet conveyor device for electrophotographic device - Google Patents
Sheet conveyor device for electrophotographic deviceInfo
- Publication number
- JPH0551147A JPH0551147A JP3210596A JP21059691A JPH0551147A JP H0551147 A JPH0551147 A JP H0551147A JP 3210596 A JP3210596 A JP 3210596A JP 21059691 A JP21059691 A JP 21059691A JP H0551147 A JPH0551147 A JP H0551147A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- endless belt
- fixing
- section
- transfer
- 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.)
- Pending
Links
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Abstract
(57)【要約】
【目的】 転写部と定着部との間で用紙を正確に搬送し
得る電子写真装置の定着装置を提供する。
【構成】 転写部１０と定着部１４との間に通気性の無
端ベルト１９を有するベルトコンベア１３設け、転写部
１０に対して最小の用紙１２の長さより短い間隔を開け
て位置する吸気ファンと定着部１４に対して最小の用紙
１２の長さより短い間隔を開けて位置する吸気ファンと
を含む複数の吸気ファン２１，２２を互いに最小の用紙
１２の長さよりも短い間隔を開けて用紙搬送方向に沿っ
て配設し、用紙１２が転写部１０から解放されて定着部
１４に挾持されるまでの間において、常に用紙１２を何
れかの吸気ファン２１，２２により無端ベルト１９に吸
引して搬送力を付与することで、用紙１２の斜行と送り
量の乱れとを防止する。
(57) [Abstract] [PROBLEMS] To provide a fixing device of an electrophotographic apparatus capable of accurately transporting a sheet between a transfer part and a fixing part. A belt conveyor 13 having a breathable endless belt 19 is provided between the transfer unit 10 and the fixing unit 14, and an intake fan is located at a distance shorter than the minimum length of the paper 12 with respect to the transfer unit 10. A plurality of intake fans 21 and 22 including an intake fan located at a distance shorter than the minimum length of the sheet 12 with respect to the fixing unit 14 are spaced from each other at intervals shorter than the minimum length of the sheet 12 in the sheet conveyance direction. The sheet 12 is always sucked onto the endless belt 19 by one of the intake fans 21 and 22 until the sheet 12 is released from the transfer section 10 and held by the fixing section 14 and conveyed. By applying the force, the skew of the sheet 12 and the disturbance of the feed amount are prevented.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子写真装置の用紙搬
送装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying device for an electrophotographic apparatus.
【０００２】[0002]
【従来の技術】従来、感光体の外周面で現像されたトナ
ー画像を用紙に転写する転写部と、用紙に転写された転
写画像を定着する定着部との間にベルトコンベアを設
け、このベルトコンベアにより転写部から定着部に用紙
を搬送するようしにした電子写真装置の用紙搬送装置に
おいて、実開平１−７５０５８号公報に記載されている
ように、ベルトコンベアを構成する通気性のある無端ベ
ルトの内方に吸気ファンを固定的に設け、吸気ファンの
吸気作用により用紙を無端ベルトの表面に吸引しながら
用紙をベルトコンベアで定着部に搬送するようにした考
案がある。2. Description of the Related Art Conventionally, a belt conveyor is provided between a transfer section for transferring a toner image developed on the outer peripheral surface of a photoconductor to a sheet and a fixing section for fixing the transferred image transferred on the sheet. In a sheet conveying device of an electrophotographic apparatus, which conveys a sheet from a transfer section to a fixing section by a conveyor, as described in Japanese Utility Model Publication No. 1-75058, a breathable endless belt conveyor is constructed. There is a device in which an intake fan is fixedly provided inside the belt, and the paper is conveyed to a fixing unit by a belt conveyor while suctioning the paper to the surface of the endless belt by the intake action of the intake fan.
【０００３】また、実開昭５７−１００７４７号公報に
記載されているように、ベルトコンベアの無端ベルトの
幅方向に沿って複数の吸気ファンを配設し、搬送する用
紙幅に応じて駆動する吸気ファンを選択するようにした
考案がある。Further, as described in Japanese Utility Model Application Laid-Open No. 57-110047, a plurality of intake fans are arranged along the width direction of the endless belt of the belt conveyor and driven according to the width of the sheet to be conveyed. There is a device that selects the intake fan.
【０００４】[0004]
【発明が解決しようとする課題】用紙は搬送過程におい
て、始めは転写部により搬送力を受け、続いて吸気ファ
ンにより無端ベルトに吸引されて無端ベルトから搬送力
を受け、さらに定着部により搬送力を受けるが、従来の
ものは、転写部と定着部との間隔に対して使用する用紙
長さが著しく短い場合、用紙が転写部から離れて定着部
に達しない過程があり、かつ、吸気ファンから外れた位
置では用紙が無端ベルトに吸引されない過程がある。こ
の結果、用紙が斜行し、或いは、無端ベルトに対して用
紙がスリップして搬送位置が狂うことがある。In the course of carrying a sheet, a sheet is first subjected to a carrying force by a transfer section, then sucked by an endless belt by an intake fan to receive a carrying force from the endless belt, and further, a fixing section carries a carrying force. However, in the conventional type, when the length of the paper used is extremely short with respect to the distance between the transfer unit and the fixing unit, there is a process in which the paper does not reach the fixing unit by separating from the transfer unit. There is a process in which the paper is not sucked by the endless belt at the position away from. As a result, the sheet may skew, or the sheet may slip with respect to the endless belt, causing the transport position to shift.
【０００５】また、実開平１−７５０５８号公報に記載
された考案は、無端ベルトが巻回される駆動ローラと従
動ローラとの両端を保持する側板の内面で用紙の両側を
案内するが、側板が電子写真装置の本体に固定されてい
るため、無端ベルト及び吸気ファンの交換やメンテナン
スに際しては、背面側の側板を本体から外した後に前面
側の側板を分解しなければならず、取り扱いが極めて面
倒である。Further, in the device disclosed in Japanese Utility Model Laid-Open No. 1-75058, both sides of a sheet are guided by an inner surface of a side plate which holds both ends of a driving roller and a driven roller around which an endless belt is wound. Is fixed to the main body of the electrophotographic apparatus, the front side plate must be disassembled after removing the rear side plate from the main body when replacing or performing maintenance on the endless belt and the intake fan. It is troublesome.
【０００６】さらに、実開昭５７−１００７４７号公報
に記載された考案は、用紙幅が広い場合には、用紙幅方
向に沿設された吸気ファンのうち、駆動する吸気ファン
の数を増やすことにより、用紙の中央のみならず両側を
無端ベルトに確実に吸引することができるが、用紙が吸
気ファンの真上を過ぎると無端ベルトに対してスリップ
し易くなる。しかも、各種の用紙幅に対応させて用紙幅
方向に多数の吸気ファンを配列しなければならず、さら
に、無端ベルトの幅を最大幅の用紙に合わせて広くしな
ければならないのでコストが高くなる。Further, in the invention disclosed in Japanese Utility Model Laid-Open No. 57-1004747, when the paper width is wide, the number of driven intake fans is increased among the intake fans arranged along the paper width direction. As a result, not only the center of the sheet but also the both sides can be surely sucked by the endless belt, but when the sheet passes right above the intake fan, the endless belt easily slips. Moreover, a large number of intake fans must be arranged in the paper width direction corresponding to various paper widths, and the width of the endless belt must be widened to match the maximum width of the paper, which increases the cost. ..
【０００７】[0007]
【課題を解決するための手段】請求項１の発明は、感光
体の外周面で現像されたトナー画像を用紙に転写する転
写部とこの用紙に転写された転写画像を定着する定着部
とを所定の間隔を開けて配設し、前記転写部と前記定着
部との間に通気性のある無端ベルトを有するベルトコン
ベアを設け、前記転写部に対して最小の用紙長さより短
い間隔を開けて位置する吸気ファンと前記定着部に対し
て最小の用紙長さより短い間隔を開けて位置する吸気フ
ァンとを含む複数の吸気ファンを互いに最小の用紙長さ
よりも短い間隔を開けて隣接させるとともに吸気側を用
紙搬送面側の前記無端ベルトの内面に対向させて前記用
紙の搬送方向に沿わせて配設した。According to a first aspect of the present invention, there is provided a transfer section for transferring the toner image developed on the outer peripheral surface of the photoconductor onto a sheet, and a fixing section for fixing the transfer image transferred onto the sheet. A belt conveyor having a breathable endless belt is provided between the transfer section and the fixing section at a predetermined interval, and a distance shorter than the minimum sheet length is provided with respect to the transfer section. A plurality of intake fans including an intake fan positioned and a suction fan positioned at a distance shorter than the minimum paper length with respect to the fixing unit are adjacent to each other at a distance shorter than the minimum paper length and at the intake side. Was arranged so as to face the inner surface of the endless belt on the side of the sheet conveying surface and along the sheet conveying direction.
【０００８】請求項２の発明は、請求項１において、駆
動部に連結された回転自在の出力部を有する支持体を転
写部と定着部との間に設け、前記支持体の中央部に着脱
自在に装着された枠体に、前記出力部に着脱自在に連結
される入力部を有する駆動ローラと従動ローラとの両端
を回転自在に設けてこれらの駆動ローラと従動ローラと
に通気性を有する無端ベルトを巻回するとともに複数の
吸気ファンを装着してベルトコンベアを形成した。According to a second aspect of the present invention, in the first aspect, a support having a rotatable output section connected to the drive section is provided between the transfer section and the fixing section, and is attached to and detached from the center of the support. Both ends of a drive roller and a driven roller having an input portion detachably connected to the output portion are rotatably provided on a frame body which is freely attached, and the drive roller and the driven roller have air permeability. A belt conveyor was formed by winding an endless belt and mounting a plurality of intake fans.
【０００９】請求項３の発明は、請求項１又は２におい
て、最小の用紙幅よりも無端ベルトの幅を狭くし、この
無端ベルトの幅よりも吸気ファンの径を小さく定めた。According to a third aspect of the present invention, in the first or second aspect, the width of the endless belt is made narrower than the minimum sheet width, and the diameter of the intake fan is set smaller than the width of the endless belt.
【００１０】[0010]
【作用】請求項１の発明は、転写部と定着部との間隔に
対して著しく短い用紙を搬送する場合にでも、転写部か
ら解放されて定着部に挾持されるまでの中間過程におい
て、常に用紙を何れかの吸気ファンにより無端ベルトに
吸引して無端ベルトから用紙に搬送力を付与することが
でき、これにより、転写部と定着部との間の搬送過程に
おいて、用紙が自由に動き得る状態を回避して用紙の斜
行を防止するとともに用紙の送り量を正確に定めること
ができる。According to the first aspect of the present invention, even when a sheet having a remarkably short distance between the transfer section and the fixing section is conveyed, the sheet is always released during the intermediate process from being released from the transfer section to being held by the fixing section. The sheet can be sucked by the endless belt by any of the intake fans and a conveying force can be applied to the sheet from the endless belt, which allows the sheet to freely move in the conveying process between the transfer unit and the fixing unit. The state can be avoided to prevent the sheet from skewing, and the sheet feeding amount can be accurately determined.
【００１１】請求項２の発明は、無端ベルトが巻回され
た駆動ローラと従動ローラと吸気ファンとを保持する枠
体を支持体から容易に取り外すことができるため、無端
ベルトや吸気ファンのメンテナンスを容易に行うことが
できる。According to the second aspect of the present invention, since the frame body for holding the drive roller, the driven roller and the intake fan around which the endless belt is wound can be easily removed from the support, maintenance of the endless belt and the intake fan is possible. Can be done easily.
【００１２】請求項３の発明は、用紙の中央部を複数の
吸気ファンにより無端ベルトに吸引させることができる
ため、無端ベルトの幅より小さい吸気ファンを用いても
吸引作用を促進させることができ、また、最小の用紙幅
より狭い無端ベルトを用いることによりコストダウンを
図ることができる。According to the third aspect of the present invention, since the central portion of the sheet can be sucked by the endless belt by the plurality of intake fans, the suction action can be promoted even if an intake fan smaller than the width of the endless belt is used. Further, the cost can be reduced by using the endless belt which is narrower than the minimum paper width.
【００１３】[0013]
【実施例】請求項１の発明の一実施例を図１及び図２に
基づいて説明する。まず、図２に電子写真装置の全体の
構造を示す。図中、１は回転自在の感光体で、この感光
体１の周囲には、この感光体１に電荷を印加して帯電さ
せる帯電チャージャ２と、この帯電部分に印字信号に基
づいてレーザー光３を照射して静電潜像を形成する露光
部（図示せず）と、感光体１上の静電潜像を現像する現
像器４と、感光体１上の現像画像が転写される中間転写
ベルト５と、感光体１を清掃するクリーニング部６とが
配列されている。この中間転写ベルト５は正逆回転自在
のモータに駆動されるローラ７を含む複数のローラ７に
巻回され、これらのローラ７の一つには電源８からバイ
アスが印加される。そして、中間転写ベルト５とこの中
間転写ベルト５に接触する転写ローラ９とにより転写部
１０が形成されている。この転写ローラ９には電源１１
からバイアスが印加される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the invention of claim 1 will be described with reference to FIGS. First, FIG. 2 shows the overall structure of the electrophotographic apparatus. In the figure, reference numeral 1 is a rotatable photoconductor, around the photoconductor 1, a charger 2 for applying a charge to the photoconductor 1 to charge the photoconductor 1 and a laser beam 3 for charging the charged portion based on a print signal. An exposure unit (not shown) that irradiates an electrostatic latent image to form an electrostatic latent image, a developing device 4 that develops the electrostatic latent image on the photoconductor 1, and an intermediate transfer to which the developed image on the photoconductor 1 is transferred. A belt 5 and a cleaning unit 6 for cleaning the photoconductor 1 are arranged. The intermediate transfer belt 5 is wound around a plurality of rollers 7 including a roller 7 driven by a motor capable of rotating in the normal and reverse directions, and a bias is applied to one of the rollers 7 from a power source 8. A transfer portion 10 is formed by the intermediate transfer belt 5 and the transfer roller 9 that contacts the intermediate transfer belt 5. The transfer roller 9 has a power source 11
Bias is applied from.
【００１４】前記現像器４はブラック、マゼンタ、シア
ン、イエローの複数の現像部を有し、カラー現像に際し
ては、これらの現像部により感光体１上の静電潜像を現
像するものである。また、前記中間転写ベルト５は、一
色の現像画像が感光体１から転写される度に図示しない
機構により感光体１から離反された状態でスタート位置
まで逆方向に駆動され、感光体１上に現像された次の色
の現像画像を転写させるために感光体１に接触された状
態で正方向に駆動される動作を繰り返す。これにより、
中間転写ベルト５に複数色の現像画像が重なって転写さ
れる。The developing device 4 has a plurality of developing portions for black, magenta, cyan, and yellow. During color development, these developing portions develop the electrostatic latent image on the photosensitive member 1. Further, the intermediate transfer belt 5 is driven in the reverse direction to a start position in a state of being separated from the photoconductor 1 by a mechanism (not shown) every time a developed image of one color is transferred from the photoconductor 1, and the intermediate transfer belt 5 is transferred onto the photoconductor 1. In order to transfer the developed image of the next color developed, the operation of driving in the forward direction is repeated while being in contact with the photoconductor 1. This allows
The developed images of a plurality of colors are superimposed and transferred onto the intermediate transfer belt 5.
【００１５】前記中間転写ベルト５の回転動作に同期し
て駆動される給紙部（図示せず）によって供給される用
紙１２は、中間転写ベルト５と転写ローラ９との間を通
過する時に中間転写ベルト５に転写された画像が用紙１
２に転写される。この用紙１２はベルトコンベア１３に
より定着部１４に搬送される。この定着部１４は、ヒー
タを内蔵するヒートローラ１５とプレスローラ１６とよ
りなり、これらのヒートローラ１５とプレスローラ１６
とで用紙１２を挾持して熱と圧力とを用紙１２に付与す
ることにより、転写画像が定着される。The paper 12 supplied by a paper feeding unit (not shown) driven in synchronization with the rotation of the intermediate transfer belt 5 is intermediate when passing between the intermediate transfer belt 5 and the transfer roller 9. The image transferred to the transfer belt 5 is the paper 1
Transferred to 2. The paper 12 is conveyed to the fixing unit 14 by the belt conveyor 13. The fixing unit 14 includes a heat roller 15 having a heater built therein and a press roller 16, and the heat roller 15 and the press roller 16 are provided.
The paper 12 is clamped by and to apply heat and pressure to the paper 12, so that the transferred image is fixed.
【００１６】前記ベルトコンベア１３は、モータに駆動
される駆動ローラ１７と従動ローラ１８とに通気性を有
する無端ベルト１９を巻回することにより形成され、複
数のローラ２０により支えられている。そして、このベ
ルトコンベア１３には複数の吸気ファン２１，２２が用
紙１２の搬送方向に沿って配設されている。The belt conveyor 13 is formed by winding a breathable endless belt 19 around a driving roller 17 driven by a motor and a driven roller 18, and is supported by a plurality of rollers 20. A plurality of intake fans 21 and 22 are arranged on the belt conveyor 13 along the conveyance direction of the paper 12.
【００１７】図１に示すように、これらの吸気ファン２
１，２２の吸気側の開口部２３は用紙搬送面側の無端ベ
ルト１９の内面に対向され、右方の吸気ファン２１の開
口部２３の外側縁と前記転写部１０との間隔Ｌ1と、隣
接する吸気ファン２１，２２の開口部２３の内側縁の間
隔Ｌ2と、左方の吸気ファン２２の開口部２３の外側縁
と前記定着部１４との間隔Ｌ3とは、最小の前記用紙１
２の長さよりも短い間隔に定められている。As shown in FIG. 1, these intake fans 2
The inlets 23 of the intake side 1 and 22 are opposed to the inner surface of the endless belt 19 on the side of the sheet conveying surface, and the distance L 1 between the outer edge of the opening 23 of the intake fan 21 on the right side and the transfer portion 10, The distance L 2 between the inner edges of the openings 23 of the adjacent intake fans 21, 22 and the distance L 3 between the outer edge of the opening 23 of the left intake fan 22 and the fixing portion 14 are the minimum of the above-mentioned sheet. 1
The interval is shorter than the length of 2.
【００１８】このような構成において、転写部１０と定
着部１４との間隔に対して、例えば２分の１以下の短い
用紙１２を搬送する場合にでも、転写部１０から解放さ
れて定着部１４に挾持されるまでの中間過程において、
常に用紙１２を何れかの吸気ファン２１，２２により無
端ベルト１９に吸引して無端ベルト１９から用紙１２に
搬送力を付与することができる。これにより、転写部１
０と定着部１４との間の搬送過程において、用紙１２が
自由に動き得る状態を回避して用紙１２の斜行を防止す
るとともに用紙１２の送り量を正確に定めることができ
る。In such a structure, even when a short sheet 12 which is, for example, half or less of the distance between the transfer section 10 and the fixing section 14 is conveyed, it is released from the transfer section 10 and fixed. In the intermediate process until being held by
It is possible to always suck the paper 12 to the endless belt 19 by any of the intake fans 21 and 22 and to apply a conveying force to the paper 12 from the endless belt 19. As a result, the transfer unit 1
It is possible to prevent the sheet 12 from freely moving, prevent skew of the sheet 12 and accurately determine the feed amount of the sheet 12 in the process of transporting the sheet 12 between 0 and the fixing unit 14.
【００１９】次いで、請求項２及び請求項３の発明の一
実施例を図３ないし図５に基づいて説明する。前記実施
例と同一部分は同一符号を用い説明も省略する。図３に
示すように、電子写真装置の本体に位置決めされて固定
された支持体２４と、この支持体２４に支持されるベル
トコンベア２５とが設けられいる。この支持体２４の上
面には用紙搬送面２６が形成され、中央部にはベルトコ
ンベア２５の枠体２７を位置決めして着脱自在に支持す
る凹部２８が形成されている。この凹部２８の一側の端
部にはギヤ２９を介してモータ（図示せず）に連結され
た出力部３０が回転自在に保持されている。Next, one embodiment of the inventions of claims 2 and 3 will be described with reference to FIGS. The same parts as those in the above-mentioned embodiment are designated by the same reference numerals and the description thereof will be omitted. As shown in FIG. 3, a support 24 positioned and fixed to the main body of the electrophotographic apparatus and a belt conveyor 25 supported by the support 24 are provided. A paper transport surface 26 is formed on the upper surface of the support 24, and a recess 28 for positioning the frame 27 of the belt conveyor 25 and detachably supporting the frame 27 is formed in the center. An output unit 30 connected to a motor (not shown) via a gear 29 is rotatably held at one end of the recess 28.
【００２０】前記ベルトコンベア２５は、図４及び図５
に示すように、枠体２７の両端に回転自在に保持された
駆動ローラ１７と従動ローラ１８とに通気性を有する無
端ベルト１９を巻回するとともに、複数の吸気ファン２
１，２２を用紙１２の搬送方向に沿って配列することに
より形成されている。駆動ローラ１７の一端には前記出
力部３０から回転力を受ける入力部３１が形成され、枠
体２７の側面には出力部３０を入力部３１に係合させる
ための切欠２７ａが形成されている。The belt conveyor 25 is shown in FIGS.
As shown in FIG. 3, the breathable endless belt 19 is wound around the drive roller 17 and the driven roller 18, which are rotatably held at both ends of the frame 27, and the plurality of intake fans 2 are provided.
It is formed by arranging 1 and 22 along the conveyance direction of the paper 12. An input portion 31 that receives a rotational force from the output portion 30 is formed at one end of the driving roller 17, and a notch 27a for engaging the output portion 30 with the input portion 31 is formed on a side surface of the frame 27. ..
【００２１】そして、前記無端ベルト１９は幅ＷBは、
最小の用紙１２の幅ＷPよりも小さい寸法に定められ、
前記吸気ファン２１，２２の開口部２３の径ＷFは無端
ベルト１９の幅ＷBより小さい寸法に設定されている。The width W B of the endless belt 19 is
The size is set to be smaller than the minimum width W P of the paper 12,
The diameter W F of the opening 23 of each of the intake fans 21 and 22 is set to be smaller than the width W B of the endless belt 19.
【００２２】このような構成において、用紙１２は無端
ベルト１９により搬送されるが、幅広の用紙１２の両側
は支持体２４の用紙搬送面２６により支えられる。そし
て、無端ベルト１９が巻回された駆動ローラ１７と従動
ローラ１８と吸気ファン２１，２２とを保持する枠体２
７を支持体２４から容易に取り外すことができるため、
無端ベルト１９や吸気ファン２１，２２のメンテナンス
を容易に行うことができる。In such a structure, the sheet 12 is conveyed by the endless belt 19, but both sides of the wide sheet 12 are supported by the sheet conveying surface 26 of the support 24. Then, the frame body 2 that holds the drive roller 17, the driven roller 18, and the intake fans 21 and 22 around which the endless belt 19 is wound.
Since 7 can be easily removed from the support 24,
The endless belt 19 and the intake fans 21, 22 can be easily maintained.
【００２３】さらに、用紙１２の中央部を複数の吸気フ
ァン２１，２２により無端ベルト１９に吸引させること
ができるため、無端ベルト１９の幅ＷBより小さい吸気
ファン２１，２２を用いても吸引作用を促進させること
ができ、また、最小の用紙１２の幅ＷPより狭い幅ＷBの
無端ベルト１９を用いることによりコストダウンを図る
ことができる。Furthermore, since the central portion of the paper 12 can be sucked by the endless belt 19 by the plurality of intake fans 21, 22, suction can be performed even if the intake fans 21, 22 smaller than the width W B of the endless belt 19 are used. Further, the cost can be reduced by using the endless belt 19 having the width W B narrower than the minimum width W P of the paper 12.
【００２４】[0024]
【発明の効果】請求項１の発明は、感光体の外周面で現
像されたトナー画像を用紙に転写する転写部とこの用紙
に転写された転写画像を定着する定着部とを所定の間隔
を開けて配設し、前記転写部と前記定着部との間に通気
性のある無端ベルトを有するベルトコンベアを設け、前
記転写部に対して最小の用紙長さより短い間隔を開けて
位置する吸気ファンと前記定着部に対して最小の用紙長
さより短い間隔を開けて位置する吸気ファンとを含む複
数の吸気ファンを互いに最小の用紙長さよりも短い間隔
を開けて隣接させるとともに吸気側を用紙搬送面側の前
記無端ベルトの内面に対向させて前記用紙の搬送方向に
沿わせて配設したので、転写部と定着部との間隔に対し
て著しく短い用紙を搬送する場合にでも、転写部から解
放されて定着部に挾持されるまでの中間過程において、
常に用紙を何れかの吸気ファンにより無端ベルトに吸引
して無端ベルトから用紙に搬送力を付与することがで
き、これにより、転写部と定着部との間の搬送過程にお
いて、用紙が自由に動き得る状態を回避して用紙の斜行
を防止するとともに用紙の送り量を正確に定めることが
できる効果を有する。According to the first aspect of the invention, the transfer portion for transferring the toner image developed on the outer peripheral surface of the photoconductor to the paper and the fixing portion for fixing the transferred image transferred on the paper are provided at predetermined intervals. An intake fan that is opened and provided with a belt conveyor having an endless belt having air permeability between the transfer section and the fixing section, and that is located at a distance shorter than the minimum sheet length with respect to the transfer section. And a plurality of intake fans including an intake fan located at a distance shorter than the minimum paper length with respect to the fixing unit and adjacent to each other at an interval shorter than the minimum paper length, and the intake side of the paper conveyance surface. Since it is arranged so as to face the inner surface of the endless belt on the side and along the conveyance direction of the sheet, even when conveying a sheet that is significantly shorter than the distance between the transfer section and the fixing section, it is released from the transfer section. Being a fixing unit In the intermediate process until the lifting,
It is possible to always apply suction force to the endless belt by one of the intake fans and to apply a conveying force to the paper from the endless belt, which allows the sheet to move freely during the conveying process between the transfer section and the fixing section. This has the effects of avoiding the obtained state, preventing skew of the paper, and being able to accurately determine the paper feed amount.
【００２５】請求項２の発明は、請求項１において、駆
動部に連結された回転自在の出力部を有する支持体を転
写部と定着部との間に設け、前記支持体の中央部に着脱
自在に装着された枠体に、前記出力部に着脱自在に連結
される入力部を有する駆動ローラと従動ローラとの両端
を回転自在に設けてこれらの駆動ローラと従動ローラと
に通気性を有する無端ベルトを巻回するとともに複数の
吸気ファンを装着してベルトコンベアを形成したので、
無端ベルトが巻回された駆動ローラと従動ローラと吸気
ファンとを保持する枠体を支持体から容易に取り外すこ
とができるため、無端ベルトや吸気ファンのメンテナン
スを容易に行うことができる効果を有する。According to a second aspect of the present invention, in the first aspect, a support having a rotatable output section connected to the driving section is provided between the transfer section and the fixing section, and is attached to and detached from the center of the support. Both ends of a drive roller and a driven roller having an input portion detachably connected to the output portion are rotatably provided on a frame body which is freely attached, and the drive roller and the driven roller have air permeability. Since the endless belt is wound and a plurality of intake fans are attached to form a belt conveyor,
Since the frame body that holds the driving roller around which the endless belt is wound, the driven roller, and the intake fan can be easily removed from the support, the endless belt and the intake fan can be easily maintained. ..
【００２６】請求項３の発明は、請求項１又は２におい
て、最小の用紙幅よりも無端ベルトの幅を狭くし、この
無端ベルトの幅よりも吸気ファンの径を小さく定めたの
で、用紙の中央部を複数の吸気ファンにより無端ベルト
に吸引させることができるため、無端ベルトの幅より小
さい吸気ファンを用いても吸引作用を促進させることが
でき、また、最小の用紙幅より狭い無端ベルトを用いる
ことによりコストダウンを図ることができる効果を有す
る。According to the invention of claim 3, in claim 1 or 2, the width of the endless belt is made narrower than the minimum paper width, and the diameter of the intake fan is set smaller than the width of the endless belt. Since the central part can be sucked into the endless belt by a plurality of intake fans, the suction action can be promoted even if an intake fan smaller than the width of the endless belt is used, and an endless belt narrower than the minimum paper width can be used. By using it, there is an effect that the cost can be reduced.
【図１】請求項１の発明の一実施例を示す正面図であ
る。FIG. 1 is a front view showing an embodiment of the invention of claim 1;
【図２】その電子写真装置の内部構造を示す正面図であ
る。FIG. 2 is a front view showing the internal structure of the electrophotographic apparatus.
【図３】請求項２及び請求項３の発明の一実施例を示す
斜視図である。FIG. 3 is a perspective view showing an embodiment of the inventions of claims 2 and 3;
【図４】その平面図である。FIG. 4 is a plan view thereof.
【図５】その正面図である。FIG. 5 is a front view thereof.
１ 感光体 １０ 転写部 １３ ベルトコンベア １４ 定着部 １７ 駆動ローラ １８ 従動ローラ １９ 無端ベルト ２１，２２ 吸気ファン ２４ 支持体 ２５ ベルトコンベア ２７ 枠体 ３０ 出力部 ３１ 入力部 1 Photoconductor 10 Transfer Part 13 Belt Conveyor 14 Fixing Part 17 Drive Roller 18 Driven Roller 19 Endless Belts 21 and 22 Intake Fan 24 Support 25 Belt Conveyor 27 Frame 30 Output 30 Input
Claims (3)
を用紙に転写する転写部とこの用紙に転写された転写画
像を定着する定着部とを所定の間隔を開けて配設し、前
記転写部と前記定着部との間に通気性のある無端ベルト
を有するベルトコンベアを設け、前記転写部に対して最
小の用紙長さより短い間隔を開けて位置する吸気ファン
と前記定着部に対して最小の用紙長さより短い間隔を開
けて位置する吸気ファンとを含む複数の吸気ファンを互
いに最小の用紙長さよりも短い間隔を開けて隣接させる
とともに吸気側を用紙搬送面側の前記無端ベルトの内面
に対向させて前記用紙の搬送方向に沿わせて配設したこ
とを特徴とする電子写真装置の用紙搬送装置。1. A transfer section for transferring a toner image developed on the outer peripheral surface of a photoreceptor to a sheet and a fixing section for fixing the transferred image transferred to the sheet are arranged at a predetermined interval, and A belt conveyor having a breathable endless belt is provided between the transfer unit and the fixing unit, and with respect to the suction fan and the fixing unit that are located at a distance shorter than the minimum sheet length with respect to the transfer unit. A plurality of intake fans, including an intake fan positioned at a distance shorter than the minimum paper length, are adjacent to each other at intervals shorter than the minimum paper length, and the suction side is the inner surface of the endless belt on the side of the sheet conveyance surface. A sheet conveying device of an electrophotographic apparatus, which is disposed so as to face the sheet and is arranged along the sheet conveying direction.
有する支持体を転写部と定着部との間に設け、前記支持
体の中央部に着脱自在に装着された枠体に、前記出力部
に着脱自在に連結される入力部を有する駆動ローラと従
動ローラとの両端を回転自在に設けてこれらの駆動ロー
ラと従動ローラとに通気性を有する無端ベルトを巻回す
るとともに複数の吸気ファンを装着してベルトコンベア
を形成したことを特徴とする請求項１記載の電子写真装
置の用紙搬送装置。2. A support body having a rotatable output section connected to a drive section is provided between a transfer section and a fixing section, and the frame body is detachably attached to a central portion of the support body. Both ends of a driving roller and a driven roller having an input portion detachably connected to the output portion are rotatably provided, and an endless belt having air permeability is wound around the driving roller and the driven roller, and a plurality of intakes are provided. The sheet conveying device for an electrophotographic apparatus according to claim 1, wherein a fan is mounted to form a belt conveyor.
くし、この無端ベルトの幅よりも吸気ファンの径を小さ
く定めたことを特徴とする請求項１又は２記載の電子写
真装置の用紙搬送装置。3. The electrophotographic apparatus according to claim 1, wherein the width of the endless belt is narrower than the minimum paper width, and the diameter of the intake fan is set smaller than the width of the endless belt. Paper transport device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3210596A JPH0551147A (en) | 1991-08-22 | 1991-08-22 | Sheet conveyor device for electrophotographic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3210596A JPH0551147A (en) | 1991-08-22 | 1991-08-22 | Sheet conveyor device for electrophotographic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0551147A true JPH0551147A (en) | 1993-03-02 |
Family
ID=16591945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3210596A Pending JPH0551147A (en) | 1991-08-22 | 1991-08-22 | Sheet conveyor device for electrophotographic device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0551147A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110260395A1 (en) * | 2008-07-31 | 2011-10-27 | Canon Kabushiki Kaisha | Sheet conveying apparatus and image forming apparatus |
| JP2022547924A (en) * | 2019-09-09 | 2022-11-16 | カマ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Method and apparatus for glossing prints |
-
1991
- 1991-08-22 JP JP3210596A patent/JPH0551147A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110260395A1 (en) * | 2008-07-31 | 2011-10-27 | Canon Kabushiki Kaisha | Sheet conveying apparatus and image forming apparatus |
| US8668197B2 (en) * | 2008-07-31 | 2014-03-11 | Canon Kabushiki Kaisha | Sheet conveying apparatus and image forming apparatus |
| JP2022547924A (en) * | 2019-09-09 | 2022-11-16 | カマ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング | Method and apparatus for glossing prints |
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