JPH0460664A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPH0460664A JPH0460664A JP2173001A JP17300190A JPH0460664A JP H0460664 A JPH0460664 A JP H0460664A JP 2173001 A JP2173001 A JP 2173001A JP 17300190 A JP17300190 A JP 17300190A JP H0460664 A JPH0460664 A JP H0460664A
- Authority
- JP
- Japan
- Prior art keywords
- photoreceptor
- developer
- photosensitive body
- developing sleeve
- image
- 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
- 108091008695 photoreceptors Proteins 0.000 claims description 92
- 230000001105 regulatory effect Effects 0.000 claims description 39
- 239000010410 layer Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 4
- 125000006850 spacer group Chemical group 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 238000001454 recorded image Methods 0.000 description 2
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
- Color Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
イ、産業上の利用分野
本発明は、像形成装置に関し、例えば、電子写真方式に
よって像を形成する像形成装置に関する。DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to an image forming apparatus, and for example, to an image forming apparatus that forms an image by electrophotography.
口、従来技術
電子写真方式による像形成は、次のようにして遂行され
る。予め帯電された感光体に像露光して受光部と非受光
部との表面電位の差による静電潜像を感光体表面に形成
せしめ、前記帯電と同極性に帯電された現像剤によって
静電潜像を反転現像して感光体表面に可視像を形成し、
この可視像を記録紙に転写し、更に定着する。Image formation using the prior art electrophotographic method is performed as follows. A pre-charged photoreceptor is imagewise exposed to form an electrostatic latent image on the surface of the photoreceptor due to the difference in surface potential between a light-receiving area and a non-light-receiving area. The latent image is reversely developed to form a visible image on the surface of the photoreceptor,
This visible image is transferred to recording paper and further fixed.
感光体には回転可能なドラム状感光体が広く採用されて
おり、このドラム状感光体の周囲には、帯電装置、像露
光装置、現像装置、転写装置、除電装置、余剰の現像剤
成分（トナー）を感光体から除去するためのクリーニン
グ装置と言った種々の装置が配設される。そして、ドラ
ム状感光体が回転しながら前記のプロセスを経て記録紙
に像が形成される。A rotatable drum-shaped photoconductor is widely used as a photoconductor, and around this drum-shaped photoconductor there are a charging device, an image exposure device, a developing device, a transfer device, a static eliminator, and an excess developer component ( Various devices are provided, such as cleaning devices, for removing toner (toner) from the photoreceptor. Then, while the drum-shaped photoreceptor rotates, an image is formed on the recording paper through the above process.
ところで、像形成器の上下方向の寸法を小さくして扁平
なものにし度いとの要請があるが、感光体の周囲に上記
のように多種類の装置が配設されているため、この要請
に応えるには限界がある。By the way, there is a request to reduce the vertical dimension of the image forming device and make it flat, but since many types of devices are arranged around the photoreceptor as mentioned above, it is difficult to meet this request. There are limits to what we can respond to.
特に、フルカラーの像形成装置にあっては、現像器は、
三原色であるシアン、イエロー、マゼンタ用として少な
くとも３個の現像器を必要とし、黒色を鮮明にするため
には更に黒色用の現像器を配設せねばならず、上記の要
請に応えるのは困難である。また、回転ドラム感光体で
は、Ａ３サイズと言った大サイズの記録紙に像形成を行
うには感光体の径をそれに応じて大きくせねばならず、
像形成装置が大型化せざるを得ない。In particular, in a full-color image forming device, the developing device is
At least three developing devices are required for the three primary colors cyan, yellow, and magenta, and in order to make black clearer, an additional developing device for black must be installed, making it difficult to meet the above requirements. It is. In addition, with a rotating drum photoreceptor, in order to form an image on a large-sized recording paper such as A3 size, the diameter of the photoreceptor must be increased accordingly.
The image forming device has no choice but to become larger.
これに対し、対のプーリーに掛けられて周回するエンド
レスベルト状の感光体を水平にして使用すれば、上記の
要請に応えるのが容易であり１、また、大サイズの記録
紙に像形成を行うにも像形成装置の大型化も僅かで済む
という利点がある。On the other hand, if an endless belt-like photoreceptor that is rotated around a pair of pulleys is used horizontally, it is easy to meet the above requirements1, and it is also possible to form images on large-sized recording paper. There is an advantage that the size of the image forming apparatus can be increased only slightly.
特に３個又は４個の現像器を配設するフルカラーの像形
成装置にあっては、エンドレスベルト状感光体の水平部
分に対向して現像器を配設するのが好ましい。Particularly in a full-color image forming apparatus having three or four developing devices, it is preferable to arrange the developing devices so as to face the horizontal portion of the endless belt-like photoreceptor.
ところで、現像器には、現像剤溜まりから感光体へ現像
剤を供給する現像剤搬送手段としての回転可能な現像ス
リーブが設けられていて、現像スリーブは感光体に対し
て所定の微小間隔を隔てて位置している。この微小間隔
が正確でないと、現像が良好にはなされず、得られる画
像も良好なもノテハなくなる。エンドレスベルト状感光
体を使用する場合、ドラム状感光体を使用する場合とは
異なり、上記の微小間隔を正確にするように現像スリー
ブの位置決めをするのが困難である。Incidentally, the developing device is provided with a rotatable developing sleeve that serves as a developer conveying means for supplying developer from a developer reservoir to the photoreceptor, and the developing sleeve is spaced apart from the photoreceptor by a predetermined minute distance. It is well located. If this minute interval is not accurate, development will not be carried out well and the resulting image will not be as good as it should be. When using an endless belt-like photoreceptor, unlike when using a drum-like photoreceptor, it is difficult to position the developing sleeve so as to accurately maintain the above-mentioned minute intervals.
ハ０発明の目的
本発明は、エンドレスベルト状感光体と現像剤搬送手段
との位置関係設定が正確かつ容易になされ、常に良好な
可視像が得られる像形成装置を提供することを目的とし
ている。The object of the present invention is to provide an image forming apparatus in which the positional relationship between an endless belt-like photoreceptor and a developer conveying means can be accurately and easily set, and a good visible image can always be obtained. There is.
二１発明の構成
第一の発明は、
周回可能なエンドレスベルト状感光体と、この感光体に
現像剤を供給するための現像剤搬送手段（例えば後述の
現像スリーブ４１）と、前記感光体の前記現像剤搬送手
段とは反対側に位置しかつ前記感光体よりも幅広で、こ
の感光体を接触させながらこれを案内するガイド手段（
例えば後述のプラテン９）と
を有し、前記ガイド手段の前記感光体の幅方向外側の位
置に感光***置規制部が設けられ、前記ガイド手段の前
記感光***置規制部付近に前記現像剤搬送手段の軸支部
品（例えば後述の現像スリーブ位置規制部材５５Ａ）が
接当して前記感光体に対する前記現像剤搬送手段の位置
が定まるように構成された像形成装置に係る。21. Constitution of the Invention The first invention comprises a rotatable endless belt-like photoreceptor, a developer conveying means (for example, a developing sleeve 41 described later) for supplying developer to the photoreceptor, and a a guide means (located on the opposite side of the developer conveying means, wider than the photoreceptor, guiding the photoreceptor while making contact therewith);
For example, the platen 9) described below is provided, a photoreceptor position regulating portion is provided at a position outside the photoreceptor in the width direction of the guide means, and the developer is conveyed near the photoreceptor position regulating portion of the guide means. The present invention relates to an image forming apparatus configured such that the position of the developer conveying means with respect to the photoreceptor is determined by abutting a shaft-supported part of the means (for example, a developing sleeve position regulating member 55A described later).
第二の発明は、
周回可能なエンドレスベルト状感光体と、この感光体に
現像剤を供給するための現像剤搬送手段と、
前記感光体の前記現像剤搬送手段とは反対側に位置しか
つ前記感光体よりも幅広で、この感光体を接触させなが
らこれを案内するガイド手段と
を有し、前記ガイド手段の前記感光体の幅方向外側の位
置に感光***置規制部が設けられ、現像器のシャーシの
前記現像剤搬送手段を軸支する軸支部分（例えば後述の
シャーシ側壁５０ａ、５０ｂ）が前記ガイド手段の前記
感光***置規制部付近に接当して前記感光体に対する前
記現像剤搬送手段の位置が定まるように構成された像形
成装置に係る。A second invention comprises: a rotatable endless belt-like photoreceptor; a developer conveyance means for supplying developer to the photoreceptor; a guide means that is wider than the photoreceptor and guides the photoreceptor while contacting the photoreceptor; a photoreceptor position regulating portion is provided at a position outside the photoreceptor in the width direction of the guide means; A shaft-supporting portion (for example, chassis side walls 50a and 50b, which will be described later) of the chassis of the device that pivotally supports the developer conveying means comes into contact with the vicinity of the photoreceptor position regulating portion of the guide means, so that the developer relative to the photoreceptor is The present invention relates to an image forming apparatus configured such that the position of a conveying means is determined.
ホ、実施例 以下、本発明の詳細な説明する。E, Example The present invention will be explained in detail below.
第１図〜第１４図は第一の発明の実施例を示す。1 to 14 show an embodiment of the first invention.
第５図は、ディジタルコピ一方式による多色画像形成装
置の内部概略正面図である。FIG. 5 is a schematic front view of the interior of a multicolor image forming apparatus using one type of digital copying.
この例では、感光体には、第１１図に拡大図示するよう
に、エンドレスベルト状の基体１ａ表面に感光層１ｂを
被着してなるエンドレスベルト状感光体１を使用してい
る。エンドレスベルト状感光体（以下、単に「感光体」
と呼ぶ。）１は、駆動プーリー２Ａと従動プーリー２日
とに掛けられ、矢印のように周回可能になっている。感
光体１が後述する各部との位置関係を正確にして位置す
るように、感光体１内にはプラテン９が位置している。In this example, as shown in an enlarged view in FIG. 11, an endless belt-shaped photoreceptor 1 is used, which has a photosensitive layer 1b adhered to the surface of an endless belt-shaped base 1a. Endless belt-shaped photoconductor (hereinafter simply referred to as "photoconductor")
It is called. ) 1 is hung between the drive pulley 2A and the driven pulley 2, and can rotate as shown by the arrow. A platen 9 is located within the photoreceptor 1 so that the photoreceptor 1 is positioned in an accurate positional relationship with each part described later.
感光体１の下側にはスコロトロン帯電極３．４台の現像
器３１Ｙ、３１Ｍ、３１Ｃ１３１に１転写極４及び分離
極５が配設されている。感光体１はその側縁に設けられ
た導電性塗布層（図示省略）に摺接する導電性刷子７を
介して接地される。Below the photoreceptor 1, a scorotron band electrode 3, four developing devices 31Y, 31M, and 31C131, one transfer pole 4, and a separation pole 5 are arranged. The photoreceptor 1 is grounded via a conductive brush 7 that is in sliding contact with a conductive coating layer (not shown) provided on the side edge of the photoreceptor 1 .
記録紙Ｐは、駆動プーリー２Ａの下の給紙ローラ１０に
よって感光体１の下面に密着するようにしである。即ち
、プラテン９は、感光体１及び記録紙Ｐを正確に走行さ
せるガイドとして機能する。The recording paper P is brought into close contact with the lower surface of the photoreceptor 1 by a paper feed roller 10 under the drive pulley 2A. That is, the platen 9 functions as a guide for accurately moving the photoreceptor 1 and the recording paper P.
この装置によれば、画像読取り部ＬＥにおいて、原稿台
１９上に置かれた原稿１８はＸ方向に移動する照明光源
１３からの光を受け、その反射光２０はミラー１４、レ
ンズ１５及び色分解フィルタ１６を介して赤、緑、青用
の各ＣＣＤ撮像素子１７Ｒ１１７Ｇ、１７Ｂに結像され
る。これらのＣＣＤ撮像素子では、光情報を時系列の電
気信号に変えて画像データ処理部ＴＲ，（第６図参照）
へ送り、ここでイエロー、マゼンタ、シアン、黒の記録
画像データが形成される。レーザー光学系１１ではビデ
オ信号処理部ＴＲｚからのイエローの記録画像データに
基いて変調部ＭＯで半導体レーザー２１のレーザー光が
変調される（図中、２２はポリゴンミラーである）。一
方、周回する感光体１はスコロトロン帯電極３により表
面が均一に帯電される。続いてレーザー光学系１１から
の像露光りが感光体１上に照射される。このようにして
静電潜像が形成される。この静電潜像はイエロートナー
が収納されている現像器３１Ｙにより反転現像される。According to this device, in the image reading unit LE, the original 18 placed on the original platen 19 receives light from the illumination light source 13 moving in the X direction, and the reflected light 20 is reflected by the mirror 14, the lens 15, and the color separation The image is formed through the filter 16 on each of the red, green, and blue CCD image sensors 17R, 117G, and 17B. These CCD image sensors convert optical information into time-series electrical signals and send them to an image data processing unit TR (see Figure 6).
Here, recorded image data of yellow, magenta, cyan, and black are formed. In the laser optical system 11, the laser beam of the semiconductor laser 21 is modulated in the modulation section MO based on the yellow recorded image data from the video signal processing section TRz (in the figure, 22 is a polygon mirror). On the other hand, the surface of the rotating photoreceptor 1 is uniformly charged by the scorotron charge electrode 3. Subsequently, the photoreceptor 1 is irradiated with imagewise exposure light from the laser optical system 11 . In this way, an electrostatic latent image is formed. This electrostatic latent image is reversely developed by a developing device 31Y containing yellow toner.
トナー像を形成された感光体１は、再びスコロトロン帯
電極３により均一に帯電され、次に例えば読取られたマ
ゼンタの光情報に基く像露光りを受ける。形成された静
電潜像はマゼンタトナーが収納されている現像器３１Ｍ
により反転現像される。この結果、感光体１上には、イ
エロートナーとマゼンタトナーによる２色トナー像が形
成される。以下同様にして現像器３１Ｃ１３１Ｋにてシ
アントナー、黒トナーが重ねて反転現像され、感光体１
上に４色トナー像が形成される。４色トナー像は必要に
応じて転写前帯電極により電荷を与えられて転写極４で
記録紙Ｐに一度に転写される。記録紙Ｐは分離極５によ
り感光体１から分離され、定着器６で定着される。一方
、感光体１はクリーニングブレード８Ａ、スポンジロー
ラ８Ｂにより清掃される。The photoreceptor 1 on which the toner image has been formed is uniformly charged again by the scorotron charging electrode 3, and then subjected to image exposure based on, for example, the read magenta optical information. The formed electrostatic latent image is transferred to a developing device 31M containing magenta toner.
Reversal development is performed. As a result, a two-color toner image of yellow toner and magenta toner is formed on the photoreceptor 1. Thereafter, in the same manner, cyan toner and black toner are superimposed and reversely developed in the developing device 31C131K, and the photoreceptor 1
A four-color toner image is formed thereon. The four-color toner image is transferred at once onto the recording paper P at the transfer pole 4 by being charged with a pre-transfer charging electrode as required. Recording paper P is separated from photoreceptor 1 by separation pole 5 and fixed by fixing device 6 . On the other hand, the photoreceptor 1 is cleaned by a cleaning blade 8A and a sponge roller 8B.
上記においては４色トナー像を説明したが、場合によっ
て黒色以外の３色トナー像、２色トナー像又は単色トナ
ー像を形成してもよい。Although a four-color toner image has been described above, a three-color toner image other than black, a two-color toner image, or a single-color toner image may be formed depending on the case.
第６図によれば、操作部ＯＰにより制御部ＣＴを作動さ
せ、この制御部で動作制御される像読取り部ＬＥにおい
て、原稿１８の光学情報を色別の時系列信号に変換し、
Ａ／Ｄ変換後、得られたデータを画像データ処理部ＴＲ
，で処理し、更にビデオ信号処理部ＴＲ，でＤ／Ａ変換
し、記録に適したパルス幅変調或いは強度変調した信号
に変換する。画像形成部ＲＥは制御信号に基いて画像形
成のための上記したプロセスを実行し、複写紙上にトナ
ー像を転写し、記録物を形成する。この画像形成部ＲＥ
は電子写真方式を採用したものである。According to FIG. 6, the control unit CT is actuated by the operation unit OP, and the image reading unit LE whose operation is controlled by the control unit converts the optical information of the document 18 into time-series signals for each color.
After A/D conversion, the obtained data is sent to the image data processing unit TR.
, and is further subjected to D/A conversion in a video signal processing section TR to convert it into a pulse width modulated or intensity modulated signal suitable for recording. The image forming section RE executes the above-described process for forming an image based on the control signal, transfers a toner image onto copy paper, and forms a recorded matter. This image forming section RE
adopted an electrophotographic method.
上記のほか、予め設定された各種情報、特に既述した複
写倍率、色等の機能動作内容のデータをＲＯＭ （Ｒｅ
ａｄ ０ｎｌｙ Ｍｅ＋５ｏｒｙ） 、フＣＩ７ピーデ
イスク、磁気テープ等の画像メモリＭＥに記憶させ、必
要に応じて画像メモリＭＥ内の情報を取り出して画像形
成部ＲＥへ出力させることができる。In addition to the above, various preset information, especially data on functional operation contents such as the copy magnification and color described above, can be stored in the ROM (Re
The image data can be stored in an image memory ME such as a disk, a magnetic tape, etc., and the information in the image memory ME can be taken out and output to the image forming section RE as necessary.
第７図は現像器の平面図、第８図は同じく正面図、第９
図は同じく右側面図、第１０図は同しく左側面図、第１
１図は第７図のＸＩ−ＸＩ線線入大断面図ある。Figure 7 is a plan view of the developing device, Figure 8 is a front view, and Figure 9 is a front view.
The figure is also a right side view, Figure 10 is a left side view, and Figure 1 is a left side view.
FIG. 1 is a large-scale sectional view taken along the line XI--XI in FIG. 7.
シャーシ５０内で仕切り板４９で仕切られた現像剤溜ま
り４３Ａ、４３日には夫々スクリュー４６．４７が互い
に平行に設けられている。スクリュー４６．４７の中心
を結ぶ線分の略２等分線の上方から第１１図にｄ２で示
す間隔だけスクリュー４７に寄った位置を中心にして現
像スリーブ４１が位置している。このような位置関係は
、第１１図に示すスクレーバ４５の取付けに余裕を持た
せることと、スリーブ４１が現像剤溜まり４３Ａ内の現
像剤を主として搬送するようにすることのためである。Screws 46 and 47 are provided in parallel to each other in the developer reservoirs 43A and 43, which are partitioned by a partition plate 49 within the chassis 50. The developing sleeve 41 is located at a position that is closer to the screw 47 by an interval indicated by d2 in FIG. 11 from above a line that bisects the line segment connecting the centers of the screws 46 and 47. This positional relationship is intended to provide a margin for mounting the scraper 45 shown in FIG. 11 and to allow the sleeve 41 to mainly transport the developer in the developer reservoir 43A.
シャーシ側壁５０ａの外側には平歯車５３が取付けられ
、図示しないモータの軸に取付けられた平歯車に噛合し
て平歯車５３が回転するようにしである。平歯車５３に
は、スクリュー４６の軸４６ａに取付けられた平歯車４
６ｂが噛合する。平歯車４６ｂには、現像スリーブ４１
の軸４１ａに取付けられた平歯車４１ｂと、スクリュー
４７の軸４７ａに取付けられた平歯車４７ｂとが噛合す
る。かくして、第９図において、平歯車５３の矢印方向
の回転により、平歯車４６ｂ、４７ｂ、４１ｂが夫々矢
印方向に回転する。A spur gear 53 is attached to the outside of the chassis side wall 50a, and rotates by meshing with a spur gear attached to the shaft of a motor (not shown). The spur gear 53 includes the spur gear 4 attached to the shaft 46a of the screw 46.
6b meshes. The developing sleeve 41 is attached to the spur gear 46b.
A spur gear 41b attached to the shaft 41a of the screw 47 meshes with a spur gear 47b attached to the shaft 47a of the screw 47. Thus, in FIG. 9, the rotation of the spur gear 53 in the direction of the arrow causes the spur gears 46b, 47b, and 41b to rotate in the direction of the arrow, respectively.
現像剤は、現像剤供給口５２から現像剤溜まり４３Ａに
供給され、前記の各平歯車の噛合によって回転するスク
リュー４６によって第７図の左から右へ搬送され、仕切
り板４９の右側で現像剤溜まり４３Ｂに移り、ここでス
クリュー４７０回転によって右から左へ搬送され、更に
仕切り板４９の左側で現像剤溜まり４３Ａに戻る。現像
剤は、現像剤溜まり４３Ａ、４３Ｂを循環、搬送される
過程で充分に攪拌され、粒子間の摩擦によって充分に帯
電し、現像可能な状態になる。The developer is supplied from the developer supply port 52 to the developer reservoir 43A, and is conveyed from left to right in FIG. The developer moves to the developer reservoir 43B, where it is conveyed from right to left by the rotation of the screw 470, and then returns to the developer reservoir 43A on the left side of the partition plate 49. The developer is sufficiently agitated during the process of being circulated and conveyed through the developer reservoirs 43A and 43B, and is sufficiently charged by friction between the particles to become ready for development.
第７図、第８図の４２ａは、図示しないモータのクラッ
チに係合して後に述べる磁石体４２を回転させる場合に
使用するクラッチで、磁石体４２の端部に固定されてい
る。Reference numeral 42a in FIGS. 7 and 8 is a clutch used to engage a clutch of a motor (not shown) to rotate the magnet 42, which will be described later, and is fixed to the end of the magnet 42.
上記の装置において、現像器３１Ｙ、３１Ｍ、３１Ｃ１
３１Ｋには、第１１図に拡大図示したよ−うに、現像剤
搬送担体である非磁性の現像スリーブ４１が左回転し、
現像スリーブ４１内には磁石体４２が静止、位置してい
て、磁石体４２によって現像剤溜まり４３Ｂ中の現像剤
Ｏを現像スリーブ４１の表面に吸着し、現像剤Ｏを現像
域Ｅに搬送するものである。現像スリーブ４１上を搬送
・される現像剤は、途中において、透磁性材料からなり
現像スリーブ４１に従動する層厚規制ローラ４４により
厚さを規制され、現像剤層を形成する。層厚規制は、現
像スリーブ４１に対する層厚規制ローラ４４の押圧力に
よってなされる。なお、磁石体４２は、現像スリーブ４
１と逆方向又は同方向に回転させても良い。In the above apparatus, the developing units 31Y, 31M, 31C1
31K, as shown in an enlarged view in FIG.
A magnet body 42 is stationary and located inside the developing sleeve 41, and the magnet body 42 attracts the developer O in the developer reservoir 43B to the surface of the developing sleeve 41, and conveys the developer O to the developing area E. It is something. The thickness of the developer conveyed on the developing sleeve 41 is regulated on the way by a layer thickness regulating roller 44 made of a magnetically permeable material and driven by the developing sleeve 41, thereby forming a developer layer. The layer thickness is controlled by the pressing force of the layer thickness regulating roller 44 against the developing sleeve 41. Note that the magnet body 42 is attached to the developing sleeve 4
1 may be rotated in the opposite direction or in the same direction.
現像を行うときは、バイアス電源（図示省略）によって
、直流バイアス電圧及び／又は交流電圧を現像スリーブ
４１に印加する。これによって現像域Ｅにおいて現像が
行われ、現像域Ｅを通過した現像剤層はスクレーパ４５
によって現像スリーブ４１から掻落とされ、天蓋４８の
開口４８ａを経て現像剤溜まり４３Ａに還元される。When developing, a DC bias voltage and/or AC voltage is applied to the developing sleeve 41 by a bias power source (not shown). As a result, development is performed in the development area E, and the developer layer that has passed through the development area E is removed by the scraper 45.
The developer is scraped off from the developer sleeve 41 by the developer, and is returned to the developer reservoir 43A through the opening 48a of the canopy 48.
トナーとキャリアとからなる二成分系現像剤を使用する
場合、イエロー、マゼンタ、シアン及び黒のトナーＴは
、感光体１の感光層１ｂの表面に次々に付着し、感光体
１の次の周回時に感光層１ｂの表面に供給されて来る記
録紙Ｐ（第５回参照）に移り、前述したように記録紙Ｐ
に転写、定着されて多色画像が形成される。When using a two-component developer consisting of toner and carrier, the yellow, magenta, cyan, and black toners T adhere to the surface of the photosensitive layer 1b of the photoreceptor 1 one after another, and the toners T adhere to the surface of the photoreceptor layer 1b of the photoreceptor 1 in the next rotation of the photoreceptor 1. Moving on to the recording paper P that is sometimes supplied to the surface of the photosensitive layer 1b (see Part 5), as described above, the recording paper P
is transferred and fixed to form a multicolor image.
現像器を前記のような構造にすることにより、現像剤の
搬送経路が長（なってこの間の攪拌による帯電が充分に
なされ、良好な画像が得られる。By configuring the developing device as described above, the developer conveyance path is long, so that sufficient charging is achieved by stirring during this time, and a good image can be obtained.
また、現像剤りは現像スリーブ４１によって搬送されそ
の真上に位置する感光体１にトナーＴが移るようになる
ので、感光体の上方から現像する場合のように余計な現
像剤が感光体上に落下するおそれがなく、現像剤が必要
以上に消費されることがない。更に、上記の効果によっ
てエンドレスベルト状の感光体が使用できて、像形成装
置の扁平化が可能になり、フルカラーの像形成にあって
も像形成装置が巨大化することもない上に、同じ設計の
現像器が使用できて画像形成装置の製造上好都合である
。Further, since the developer is transported by the developing sleeve 41 and the toner T is transferred to the photoreceptor 1 located directly above it, unnecessary developer is transferred onto the photoreceptor as in the case of developing from above the photoreceptor. There is no risk of the developer falling, and the developer will not be consumed more than necessary. Furthermore, the above effect makes it possible to use an endless belt-like photoreceptor, which makes it possible to flatten the image forming device, so that even when forming full-color images, the image forming device does not become huge, and the same It is convenient for manufacturing the image forming apparatus because the designed developing device can be used.
前述したように、感光体と現像スリーブとは所定の微小
間隔を隔てて互いに対向するようにする必要がある。本
例では、第１１図に示す現像スリーブ４１の径を１８０
ｍｍ、感光体１と現像スリーブ４１との間隔ｄ、を０．
５ｍｍとしている。As described above, it is necessary that the photoreceptor and the developing sleeve face each other with a predetermined minute gap therebetween. In this example, the diameter of the developing sleeve 41 shown in FIG.
mm, and the distance d between the photoreceptor 1 and the developing sleeve 41 is 0.
It is set to 5mm.
本例で注目すべきことは、上記間隔ｄ１を次のようにし
て設定していることである。What should be noted in this example is that the interval d1 is set as follows.
第１図は第５図の部分拡大図、第２図は第１図の■−■
線断面図である。Figure 1 is a partially enlarged view of Figure 5, Figure 2 is from ■-■ of Figure 1.
FIG.
プラテン９の下面には、現像スリーブ４１に対向する部
分及び像露光光りが照射する箇所に円弧状凸部９ａが設
けられ、その他の領域に浅い凹部９ｂを設けてあって、
感光体１が凸部９ａの位置で正確に走行しかつ感光体１
とプラテン９との摩擦が小さくなるようにしである。感
光体１の幅は現像スリーブ４１の長さよりも大きくして
あり、感光体１の両側縁部は現像スリーブ４１から食み
出している。感光体１の両側縁には内側に裏打ち部材１
Ｃ１１Ｃが貼付けられていて、裏打ち部材１Ｃ１１Ｃが
プラテン９に設けられた溝９Ｃ１９Ｃに嵌入して感光体
１が走行方向に直角の方向に振れないようにしである。On the lower surface of the platen 9, an arcuate convex portion 9a is provided in a portion facing the developing sleeve 41 and a portion to which the image exposure light is irradiated, and shallow recesses 9b are provided in other areas.
If the photoreceptor 1 travels accurately at the position of the convex portion 9a and the photoreceptor 1
This is to reduce the friction between the platen 9 and the platen 9. The width of the photoreceptor 1 is larger than the length of the developing sleeve 41, and both side edges of the photoreceptor 1 protrude from the developing sleeve 41. Lining members 1 are provided on the inside of both sides of the photoreceptor 1.
The backing member 1C11C is fitted into a groove 9C19C provided in the platen 9 to prevent the photoreceptor 1 from swinging in a direction perpendicular to the running direction.
現像スリーブ４１の軸４１ａに現像スリーブ位置規制部
材（以下、単に「位置規制部材」と呼ぶ。）５５Ａが外
嵌して現像スリーブ４１が位置規制部材５５Ａに回転可
能に軸支され、位置規制部材５５Ａは現像器のシャーシ
５０の側壁５０ａ、５０ｂに支持される。像形成装置筐
体の底壁５８に取付けられたばね５９．５９によってシ
ャーシ５０が上方へ付勢され、位置規制部材５５Ａの上
端面がプラテン９の下面両側縁部９ｄに接当し、感光体
１と現像スリーブ４１との間隔むが前記所定の寸法にな
るように現像スリーブ４１がプラテン９に対して位置決
めされる。第２図では位置規制部材５５Ａは転がり軸受
の構造としているが、滑り軸受であっても良い（後述の
第１５図のシャーシ側壁ｅｏａ、６０ｂも同様）。A developing sleeve position regulating member (hereinafter simply referred to as "position regulating member") 55A is fitted onto the shaft 41a of the developing sleeve 41, and the developing sleeve 41 is rotatably supported by the position regulating member 55A. 55A is supported by the side walls 50a and 50b of the chassis 50 of the developing device. The chassis 50 is urged upward by springs 59 and 59 attached to the bottom wall 58 of the image forming apparatus housing, and the upper end surface of the position regulating member 55A comes into contact with the lower side edges 9d of the platen 9, and the photoreceptor 1 The developing sleeve 41 is positioned relative to the platen 9 such that the distance between the developing sleeve 41 and the developing sleeve 41 is the predetermined dimension. In FIG. 2, the position regulating member 55A has a rolling bearing structure, but it may also be a sliding bearing (the same applies to the chassis side walls eoa and 60b in FIG. 15, which will be described later).
以上のようにして、現像器３１Ｙ、３１Ｍ、３１Ｃ１３
１Ｋがシャーシ５０に収容され、全体としてカートリッ
ジ化されていて、修理や交換を容易ならしめている。As described above, the developing units 31Y, 31M, 31C13
1K is housed in the chassis 50, and the entire cartridge is used to facilitate repair and replacement.
第３図はシャーシ側壁５０ａの拡大斜視図である。FIG. 3 is an enlarged perspective view of the chassis side wall 50a.
シャーシ側壁５０ａ、５０ｂは、円形の内周面５０Ｃを
有し、上端部に切り口５０ｄが形成されている。The chassis side walls 50a, 50b have a circular inner peripheral surface 50C, and a cutout 50d is formed at the upper end.
現像スリーブ４１は第４図のようにしてシャーシ側壁５
０ｂにセットされる。The developing sleeve 41 is attached to the chassis side wall 5 as shown in FIG.
Set to 0b.
先ず、二点鎖線で示す現像スリーブ４１の軸４１ａに三
点鎖線で示す位置規制部材５５Ａを外嵌させる。この要
領は三点鎖線矢印で示しである。First, the position regulating member 55A shown by the three-dot chain line is fitted onto the shaft 41a of the developing sleeve 41, which is shown by the two-dot chain line. This point is indicated by the three-dot chain arrow.
位置規制部材５５Ａは、軸４１ａ嵌入のための円形貫通
孔５５ｅが設けられ、小外径部５５ａと大外径部５５Ｃ
とからなっている。小外径部５５ａ、大外径部５５Ｃの
上部には凸部５５ｂ、５５ｄが夫々設けられていて、小
外径部５５ａの外径は第３図のシャーシ側壁５０ａ、５
０ｂ円形内周面５０ｃの内径と同じにしてあり、凸部５
５ｂの幅は第３図の切り口５０ｄの幅と同じにしである
。The position regulating member 55A is provided with a circular through hole 55e for fitting the shaft 41a, and has a small outer diameter portion 55a and a large outer diameter portion 55C.
It consists of Convex portions 55b and 55d are provided on the upper portions of the small outer diameter portion 55a and the large outer diameter portion 55C, respectively, and the outer diameter of the small outer diameter portion 55a is the same as that of the chassis side walls 50a and 5 in FIG.
0b The inner diameter of the circular inner peripheral surface 50c is the same as that of the convex portion 5.
The width of 5b is the same as the width of cut 50d in FIG.
次に、二点鎖線矢印で示すように、位置規制部材５５Ａ
を図において左側からシャーシ側壁５０ｂに嵌め込む。Next, as shown by the two-dot chain arrow, the position regulating member 55A
is fitted into the chassis side wall 50b from the left side in the figure.
かくして、位置規制部材５５Ａは、小外径部５５ａがシ
ャーシ側壁５０ｂの円形内周面５０Ｃに、凸部５５ｂが
シャーシ側壁の切り口５０ｄに夫々嵌入し、大外径部５
５Ｃがシャーシ側壁５０ｂの側面に接当して現像スリー
ブ４１は位置規制部材５５Ａを介してシャーシ側壁５０
ｂに回転可能に取付けられる。Thus, in the position regulating member 55A, the small outer diameter portion 55a fits into the circular inner circumferential surface 50C of the chassis side wall 50b, the convex portion 55b fits into the cutout 50d of the chassis side wall, and the large outer diameter portion 5
5C is in contact with the side surface of the chassis side wall 50b, and the developing sleeve 41 is moved to the chassis side wall 50 via the position regulating member 55A.
It is rotatably attached to b.
シャーシ側壁５０ａへの現像スリーブ４１の取付けも第
４図と同様にしてなされる。第２図中の５７は、現像ス
リーブ４１の中心軸線方向の位置決めをするために軸４
１ａに外嵌する筒状スペーサで、２分割されている。シ
ャーシ側壁５０ａ１５０ｂにはキャップ５６Ａ、５６Ｂ
が夫々取付けられ、位置規制部材５５Ａがシャーシ側壁
５０ａ、５０ｂから抜出さぬようにしである。The developing sleeve 41 is attached to the chassis side wall 50a in the same manner as shown in FIG. Reference numeral 57 in FIG. 2 indicates a shaft 4 for positioning the developing sleeve 41 in the central axis direction.
It is divided into two by a cylindrical spacer that fits around 1a. Caps 56A and 56B are installed on the chassis side walls 50a150b.
are attached, respectively, to prevent the position regulating member 55A from being pulled out from the chassis side walls 50a, 50b.
以上のようにして、現像スリーブ４１は位置規制部材５
５Ａ、５５Ａを介してシャーシ側壁５０ａ、５０ｂに回
転可能に支持され、ばね５９．５９の付勢力によって位
置規制部材５５Ａ、５５Ａの凸部５５ｄ、５５ｄの上面
がプラテン９の下面両側縁部９ｄに接当し、現像スリー
ブ４１は感光体１に対して間隔ｄ、を隔てて正確かつ容
易に位置決めされる。その結果、現像後の可視−像は、
濃度のバラツキがなくて良好なものとなる。As described above, the developing sleeve 41 is moved to the position regulating member 5.
The upper surfaces of the protrusions 55d, 55d of the position regulating members 55A, 55A are rotatably supported by the chassis side walls 50a, 50b via the chassis side walls 50a, 50b, and the upper surfaces of the convex portions 55d, 55d of the position regulating members 55A, 55A are pressed against the lower surface side edges 9d of the platen 9. The developing sleeve 41 is accurately and easily positioned at a distance d from the photoreceptor 1. As a result, the visible image after development is
There is no variation in concentration, resulting in a good result.
以上の例は、プラテン９の凸部９ａを円弧状とし、位置
規制部材５５の突部５５ｄの上面を平面とし、両者を線
接触で互いに接当するようにしている。これに対し、第
１２Ａ図、第１２Ｂ図の例では、位置規制部材５５日の
大外径部５５Ｃの凸部上端側５５ｆを四角錐形状（先端
に丸みを付するのが良い。）とし、プラテン９の凸部９
Ｃを平面として両者が点接触で互いに接当するようにし
ている。第１２Ａ図は上記接当部周辺の概略正面図、第
１２Ｂ図は位置規制部材５５Ｂの拡大斜視図である。そ
の他は第４図、第１図におけると同様である。In the above example, the protrusion 9a of the platen 9 is arcuate, the upper surface of the protrusion 55d of the position regulating member 55 is a flat surface, and the two are in line contact with each other. On the other hand, in the examples shown in FIGS. 12A and 12B, the upper end side 55f of the convex portion of the large outer diameter portion 55C of the position regulating member 55 is shaped like a square pyramid (the tip is preferably rounded), Convex portion 9 of platen 9
C is a plane, and both are in point contact with each other. FIG. 12A is a schematic front view of the area around the contact portion, and FIG. 12B is an enlarged perspective view of the position regulating member 55B. Other details are the same as in FIGS. 4 and 1.
第１３Ａ図、第１３Ｂ図は、他の例による第１２Ａ図、
第１２Ｂ図と同様の概略正面図、拡大斜視図である。こ
の例では、プラテン９の凸部９Ｃを平面とし、位置規制
部材５５Ｃでは、第４図の大外径部５５Ｃに替えてこの
部分を円板状中外径部５５ｇと円板状大外径部５５ｉと
からなる形状としている。円板状中外径部５５ｇと円板
状大外径部５５ｉとには凸部を設けておらず、両者の厚
さの合計は第４図の位置規制部材５５Ａの大外径部５５
Ｃの厚さと同じにしである。この例では、円板状中外径
部５５ｇの側面５５ｈがシャーシ側壁の側面に接当し、
円板状大外径部５５ｉの外周面上端５５ｊとプラテン９
の凸部９Ｃの平面とが互いに線接触で接当する。位置規
制部材５５Ｃをこのような形状にすることにより、製造
が容易になる。なお、第１４図のように、円板状大外径
部５５にの厚さを第４図の大外径部５５Ｃの厚さと同じ
にして第１３日図の円板状中外径部５５ｇを省略するこ
ともできる。第１４図の例では、円板状大外径部５５に
の側面５５１がシャーシ側壁の側面に接当し、円板状大
外径部５５にの外周面の上端５５ｍとプラテンの平面状
凸部（第１３図の９ｄ）とが互いに線接触で接当する。Figures 13A and 13B are Figures 12A and 13B according to other examples;
FIG. 12B is a schematic front view and an enlarged perspective view similar to FIG. 12B. In this example, the convex portion 9C of the platen 9 is a flat surface, and the position regulating member 55C has a disk-shaped medium outer diameter portion 55g and a disk-shaped large outer diameter portion in place of the large outer diameter portion 55C in FIG. 55i. No convex portion is provided in the disk-shaped medium outer diameter portion 55g and the disk-shaped large outer diameter portion 55i, and the total thickness of both is equal to the large outer diameter portion 55 of the position regulating member 55A in FIG.
It is the same thickness as C. In this example, the side surface 55h of the disc-shaped middle outer diameter portion 55g is in contact with the side surface of the chassis side wall,
The upper end 55j of the outer peripheral surface of the disk-shaped large outer diameter portion 55i and the platen 9
The planes of the convex portions 9C are in line contact with each other. By forming the position regulating member 55C into such a shape, manufacturing becomes easy. In addition, as shown in FIG. 14, the thickness of the disk-shaped large outer diameter portion 55 is the same as the thickness of the large outer diameter portion 55C of FIG. It can also be omitted. In the example of FIG. 14, the side surface 551 of the disk-shaped large outer diameter section 55 is in contact with the side surface of the chassis side wall, and the upper end 55m of the outer peripheral surface of the disk-shaped large outer diameter section 55 and the planar convexity of the platen. (9d in FIG. 13) are in line contact with each other.
以上の例では、シャーシの各側壁を一体にしているが、
これを第３図に仮想線で示す形状としく図において右側
部分の上端面を上方に移動させ）、円形内周面５０ｃの
中心点を通る水平面（仮想線で示す）で上下を分割する
ようにすることができる。この場合、下側部分５０ｅに
位置規制部材の小外径部を嵌入させてから、上側部分５
０ｆ、５０ｇを下側部分５０ｅに固定するようにする。In the above example, each side wall of the chassis is integrated, but
This is shaped into the shape shown by the imaginary line in Figure 3, and the upper end surface of the right side in the figure is moved upward), and the upper and lower parts are divided by a horizontal plane (indicated by the imaginary line) passing through the center point of the circular inner circumferential surface 50c. It can be done. In this case, the small outer diameter portion of the position regulating member is fitted into the lower portion 50e, and then the upper portion 50e is fitted.
0f and 50g are fixed to the lower portion 50e.
シャーシ側壁５０ａをこのような構造にすると、第２図
のスペーサ５７は２分割する必要がない。When the chassis side wall 50a has such a structure, the spacer 57 shown in FIG. 2 does not need to be divided into two parts.
上記の各側において、位置規制部材の凸部とシャーシ側
壁の切り口（第３図の５０ｄ）との凹凸嵌合は前述の逆
であっても良い。即ち、シャーシ側壁に切り口を設けず
、その内周面５０Ｃ内に突入する凸部を設け、この凸部
が位置規制部材の小外径部に設けられた凹部に嵌入する
ようにしても良い。On each of the above sides, the concave-convex fitting between the convex portion of the position regulating member and the cut end (50d in FIG. 3) of the chassis side wall may be reversed as described above. That is, instead of providing a cut in the chassis side wall, a convex portion protruding into the inner circumferential surface 50C may be provided, and this convex portion may be fitted into a concave portion provided in the small outer diameter portion of the position regulating member.
第１５図は、第二の発明の実施例における前記第２図と
同様の断面図である。FIG. 15 is a sectional view similar to FIG. 2 in the second embodiment of the invention.
現像器のシャーシ６０の側壁６０ａ、６０ｂには現像ス
リーブ４１の軸４１ａを回転可能に軸支する軸支部６０
Ａ、６０日が設けれら、軸支部６０Ａ、６０Ｂにはキャ
ップ６６Ａ、６６日がシャーシ側壁６０ａ、６０ｂに夫
々取付けられている。シャーシ側壁６０ａと現像スリー
ブ４１との間には円筒形のスペーサ６７が軸４１ａに外
嵌し、現像スリーブ４１の中心軸線方向の移動が起こら
ぬようにしである。シャーシ側壁６０ａ、６０ｂは、い
ずれも、軸４１ａの中心軸線を含む水平面６０ｅで下側
部分６０ｃと上側部分６０ｄとに分割されていて、軸４
１ａのシャーシ側壁６０ａ、６０ｂへの取付けを可能な
らしめている。シャーシ側壁６０ａ、６０ｂの上端面（
上側部分６０ｄ、６０ｄの上端面）６０ｆ、６０ｆがば
ね５９．５９の付勢力によってプラテン９の下面両側縁
部９ｄに接当し、現像スリーブ４１とプラテン９の凸部
９ａとの間隔ｄ１が前記の所定の寸法になるよう、現像
スリーブ４１の位置決めがなされる。A shaft support 60 rotatably supports the shaft 41a of the developing sleeve 41 on the side walls 60a and 60b of the chassis 60 of the developing device.
A and 60 days are provided, and caps 66A and 66 days are attached to the shaft supports 60A and 60B, respectively, to the chassis side walls 60a and 60b. A cylindrical spacer 67 is fitted around the shaft 41a between the chassis side wall 60a and the developing sleeve 41 to prevent the developing sleeve 41 from moving in the central axis direction. Each of the chassis side walls 60a and 60b is divided into a lower portion 60c and an upper portion 60d at a horizontal plane 60e that includes the central axis of the shaft 41a.
1a can be attached to the chassis side walls 60a, 60b. The upper end surfaces of the chassis side walls 60a, 60b (
The upper portions 60d, 60d upper end surfaces) 60f, 60f are brought into contact with the lower side edges 9d of the platen 9 by the biasing force of the springs 59, 59, and the distance d1 between the developing sleeve 41 and the convex portion 9a of the platen 9 is The developing sleeve 41 is positioned so that it has a predetermined dimension.
その他は前記第一の発明の実施例におけると同様である
。The rest is the same as in the embodiment of the first invention.
以上の各側は、いずれも、ディジタル露光による反転現
像の例であり、現像剤には二成分系現像剤を使用してい
るが、トナーのみからなる一成分系現像剤を使用できる
ことは言う迄もない。なおスクリューは、３個又はそれ
以上設けて良く、これらは互いに平行でなくても良いし
、フレキシブルなエンドレス構造とすることもできる。Each of the above is an example of reversal development using digital exposure, and a two-component developer is used, but it goes without saying that a one-component developer consisting only of toner can also be used. Nor. Note that three or more screws may be provided, and these may not be parallel to each other, or may have a flexible endless structure.
また、現像剤の搬送には、これを攪拌しながら搬送でき
るスクリュー以外の適宜の搬送手段を採用して良い。ま
た、本発明は、感光体上の各色のトナー像を転写体に順
次転写し、この転写体上の合成トナー像を一挙に記録紙
に転写するフルカラー画像形成にも適用し得る。この場
合は転写体は像形成装置の転写手段（前記の転写極４）
に代わって設置される。更に、像形成部（感光体及びプ
ラテン）と各現像器とを装置本体に着脱可能としたプロ
セスカートリッジとする構成を採ることもできる。Further, for conveying the developer, an appropriate conveying means other than a screw capable of conveying the developer while stirring it may be employed. The present invention can also be applied to full-color image formation in which toner images of each color on a photoreceptor are sequentially transferred to a transfer member, and a composite toner image on the transfer member is transferred all at once to recording paper. In this case, the transfer body is the transfer means of the image forming device (the transfer pole 4 described above).
will be installed in place of. Furthermore, it is also possible to adopt a configuration in which the image forming section (photoreceptor and platen) and each developing device are made into a process cartridge that is removably mountable to the main body of the apparatus.
へ０発明の効果
第一の発明は、エンドレスベルト状感光体を案内するガ
イド部材に、感光体に現像剤を供給するための現像剤搬
送手段を軸支する軸支部品が接当して感光体に対する現
像剤搬送手段の位置が定まるように構成され、第二の発
明は、現像器シャーシの現像剤搬送手段を軸支する軸支
部分が前記ガイド部材に接当して感光体に対する現像剤
搬送手段の位置が定まるように構成されているので、第
一の発明、第二の発明共に、現像剤搬送手段を軸支部品
又は現像器シャーシの軸支部分に軸支させた状態で、感
光体に対する現像剤搬送手段の位置決めが直ちになされ
る。その結果、この位置決めは正確で高精度になり、現
像によって得られる可視像は高品質なものとなる。また
、上記位置決めが容易になされて像形成装置の組立ての
生産性が向上する。Effects of the Invention The first invention is such that a shaft support part that pivotally supports a developer conveying means for supplying developer to the photoconductor comes into contact with a guide member that guides an endless belt-like photoconductor. The second aspect of the present invention is such that a shaft support portion of the developer chassis that pivotally supports the developer transporting means comes into contact with the guide member so that the developer transporting member is not moved toward the photoreceptor. Since the position of the conveyance means is determined, in both the first invention and the second invention, the developer conveyance means can be exposed to light with the developer conveyance means being pivotally supported on the shaft support part of the shaft support part or the developing device chassis. The positioning of the developer transport means relative to the body is immediately accomplished. As a result, this positioning is accurate and precise, and the visible image obtained by development is of high quality. In addition, the positioning described above is facilitated, and the productivity of assembling the image forming apparatus is improved.
第１図〜第１４図は第一の発明の実施例を示すものであ
って、
第１図は感光体と現像器との位置関係を示す概略正面図
（第５図の部分拡大図）、
第２図は第１図の■−■線断面図、
第３図は現像器のシャーシの斜視図、
第４図は現像器のシャーシに現像スリーブを取付ける要
領を示す斜視図、
第５図は多色画像形成装置の内部概略正面図、第６図は
複写動作のブロック図、
第７図は現像器の平面図、
第８図は同正面図、
第９図は同右側面図、
第１０図は同左側面図、
第１１図は第７図のＸＩ−ＸＩ線拡大断面図、第１２Ａ
図は他の例によるプラテンと現像器との位置関係を示す
部分正面図、
第１２Ｂ図は同現像スリーブ位置規制部材の斜視図、
第１３Ａ図は更に他の例によるプラテンと現像器との位
置関係を示す部分正面図、
第１３８図は同現像スリーブ位置規制部材の斜視図、
第１４図は更に他の例による現像スリーブ位置規制部材
の斜視図
である。
第１５図は第二の発明の実施例を示す第２図と同様の断
面図である。
なお、図面に示された符号において、
１・・・・・・・・・エンドレスベルト状感光体１ｃ・
・・・・・・・・裏打ち部材
２Ａ、２日・・・・・・・・・プーリー３・・・・・・
・・・帯電極
９・・・・・・・・・プラテン
９ｃ・・・・・・・・・案内溝
９ｄ・・・・・・・・・接当面
１０Ａ、１０Ｂ・・・・・・・・・ローラ１１・・・・
・・・・・レーザ光学系
３１Ｙ、３１Ｍ、３１Ｃ，３１Ｋ
・・・・・・・・・現像器
４１・・・・・・・・・現像スリーブ
４１ａ・・・・・・・・・現像スリーブの軸５０．６０
・・・・・・・・・現像器のシャーシ５０ａ、５０ｂ、
６０ａ、６０ｂ
・・・・・・・・・シャーシの側壁
５５Ａ、５５Ｂ、５５Ｃ１５５Ｄ
・・・・・・・・・現像スリーブ位置規制部材５５ｄ、
５５ｆ・・・・・・・・・凸部５５ｊ、５５ｍ・・・・
・・・・・プラテンへの接当線５７・・・・・・・・・
スペーサ
５８・・・・・・・・・像形成装置筺体の底壁５９・・
・・・・・・・ばね
６０ｆ・・・・・・・・・シャーシ側壁６０ａ、６０ｂ
のプラテンへの接当面
ｄ＋・・・・・・・・・感光体と現像スリーブとの間隔
Ｏ・・・・・・・・・二成分系現像剤
Ｔ・・・・・・・・・トナー
ＬＥ・・・・・・・・・画像読取り部
ＲＥ・・・・・・・・・画像形成部
Ｐ・・・・・・・・・記録紙
である。
代理人 弁理士 連成 宏
第４図
第９
図
第７
第８
第１２Ａ図
０ｂ
第１２Ｂ図
第１４図1 to 14 show an embodiment of the first invention, in which FIG. 1 is a schematic front view (partially enlarged view of FIG. 5) showing the positional relationship between the photoreceptor and the developing device; Figure 2 is a sectional view taken along the line ■-■ in Figure 1, Figure 3 is a perspective view of the chassis of the developer, Figure 4 is a perspective view showing how to attach the developing sleeve to the chassis of the developer, and Figure 5 is 6 is a block diagram of a copying operation, FIG. 7 is a plan view of a developing device, FIG. 8 is a front view of the same, FIG. 9 is a right side view of the same, and FIG. The figure is a left side view of the same figure, Figure 11 is an enlarged sectional view taken along the line XI-XI of Figure 7, and Figure 12A
The figure is a partial front view showing the positional relationship between the platen and the developing device according to another example, FIG. 12B is a perspective view of the same developing sleeve position regulating member, and FIG. 13A is a positional relationship between the platen and the developing device according to still another example. FIG. 138 is a perspective view of the developing sleeve position regulating member, and FIG. 14 is a perspective view of a developing sleeve position regulating member according to still another example. FIG. 15 is a sectional view similar to FIG. 2 showing an embodiment of the second invention. In addition, in the symbols shown in the drawings, 1... Endless belt-shaped photoreceptor 1c.
......Backing member 2A, 2nd day...Pulley 3...
...Charging electrode 9...Platen 9c...Guide groove 9d...Contact surfaces 10A, 10B... ...Roller 11...
...Laser optical system 31Y, 31M, 31C, 31K ...Developer 41 ...Development sleeve 41a ...Development sleeve axis of 50.60
......Developer chassis 50a, 50b,
60a, 60b......Chassis side walls 55A, 55B, 55C155D...Developing sleeve position regulating member 55d,
55f......Convex portion 55j, 55m...
...Abutting line 57 to the platen...
Spacer 58...Bottom wall 59 of the image forming device housing
...... Spring 60f... Chassis side walls 60a, 60b
contact surface d+ with the platen... Distance O between photoreceptor and developing sleeve... Two-component developer T... Toner LE... Image reading section RE... Image forming section P... Recording paper. Agent Patent Attorney Hiroshi RenseiFigure 4Figure 9Figure 7Figure 8Figure 12A 0bFigure 12BFigure 14
Claims (1)
体に現像剤を供給するための現像剤搬送手段と、 前記感光体の前記現像剤搬送手段とは反対側に位置しか
つ前記感光体よりも幅広で、この感光体を接触させなが
らこれを案内するガイド手段と を有し、前記ガイド手段の前記感光体の幅方向外側の位
置に感光***置規制部が設けられ、前記ガイド手段の前
記感光***置規制部付近に前記現像剤搬送手段の軸支部
品が接当して前記感光体に対する前記現像剤搬送手段の
位置が定まるように構成された像形成装置。 ２、周回可能なエンドレスベルト状感光体と、この感光
体に現像剤を供給するための現像剤搬送手段と、 前記感光体の前記現像剤搬送手段とは反対側に位置しか
つ前記感光体よりも幅広で、この感光体を接触させなが
らこれを案内するガイド手段と を有し、前記ガイド手段の前記感光体の幅方向外側の位
置に感光***置規制部が設けられ、現像器のシャーシの
前記現像剤搬送手段を軸支する軸支部分が前記ガイド手
段の前記感光***置規制部付近に接当して前記感光体に
対する前記現像剤搬送手段の位置が定まるように構成さ
れた像形成装置。[Scope of Claims] 1. A rotatable endless belt-like photoreceptor, a developer conveying means for supplying developer to the photoreceptor, and a position on the opposite side of the photoreceptor from the developer conveying means. The guide means is wider than the photoreceptor and guides the photoreceptor while being in contact with the photoreceptor, and a photoreceptor position regulating portion is provided at a position outside the photoreceptor in the width direction of the guide means. and an image forming apparatus configured such that a shaft support part of the developer transporting means comes into contact with a vicinity of the photoreceptor position regulating portion of the guide means to determine the position of the developer transporting means with respect to the photoreceptor. 2. A rotatable endless belt-shaped photoreceptor, a developer conveying means for supplying developer to the photoreceptor, and a developer conveying means located on the opposite side of the photoreceptor from the developer conveying means and further from the photoreceptor. The photoreceptor is also wide and has a guide means for guiding the photoreceptor while making contact with the photoreceptor, and a photoreceptor position regulating portion is provided at a position outside the photoreceptor in the width direction of the guide means, and An image forming apparatus configured such that a shaft portion that pivotally supports the developer transporting means contacts near the photoreceptor position regulating portion of the guide means to determine the position of the developer transporting means with respect to the photoreceptor. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2173001A JPH0460664A (en) | 1990-06-29 | 1990-06-29 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2173001A JPH0460664A (en) | 1990-06-29 | 1990-06-29 | Image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0460664A true JPH0460664A (en) | 1992-02-26 |
Family
ID=15952351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2173001A Pending JPH0460664A (en) | 1990-06-29 | 1990-06-29 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0460664A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014211493A (en) * | 2013-04-17 | 2014-11-13 | 富士ゼロックス株式会社 | End support component, developer holding body using the same, developing apparatus, process cartridge, and image forming apparatus |
-
1990
- 1990-06-29 JP JP2173001A patent/JPH0460664A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014211493A (en) * | 2013-04-17 | 2014-11-13 | 富士ゼロックス株式会社 | End support component, developer holding body using the same, developing apparatus, process cartridge, and image forming apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5294967A (en) | Image forming apparatus with a plurity of adjustable developing units | |
| JPH0460664A (en) | Image forming device | |
| US5140373A (en) | Electrostatic latent image developing apparatus with bristle height adjusting member | |
| JP2000267501A (en) | Image forming device | |
| JP2789042B2 (en) | Color image forming equipment | |
| JPH0460655A (en) | Image forming device | |
| JPS6338705B2 (en) | ||
| JPH10161421A (en) | Color image forming device | |
| JPH06194886A (en) | Color image forming device | |
| JPH0460656A (en) | Image forming device | |
| JPH0713390A (en) | Seal member, process cartridge using seal member, and image forming device | |
| JP2789040B2 (en) | Color image forming equipment | |
| JPH0460662A (en) | Developing device | |
| JPH0460663A (en) | Developing device | |
| JP2821771B2 (en) | Color image forming equipment | |
| JP2802782B2 (en) | Color image forming equipment | |
| JPH0460665A (en) | Developing device | |
| JP2018025731A (en) | Opposing device, process cartridge, and image forming apparatus | |
| JP2826665B2 (en) | Color image forming equipment | |
| JP2952497B2 (en) | Color image forming equipment | |
| JP5609382B2 (en) | Image forming device, developing device, imaging unit | |
| JP3020102B2 (en) | Color image forming equipment | |
| JP2784667B2 (en) | Color image forming equipment | |
| JP2802789B2 (en) | Image forming device | |
| JP2521237Y2 (en) | Color image forming device |