JP3442709B2 - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JP3442709B2 JP3442709B2 JP34567299A JP34567299A JP3442709B2 JP 3442709 B2 JP3442709 B2 JP 3442709B2 JP 34567299 A JP34567299 A JP 34567299A JP 34567299 A JP34567299 A JP 34567299A JP 3442709 B2 JP3442709 B2 JP 3442709B2
- Authority
- JP
- Japan
- Prior art keywords
- photosensitive drum
- transfer roller
- transfer
- image forming
- housing
- 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.)
- Expired - Fee Related
Links
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Electrophotography Configuration And Component (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は，感光体ドラムとこ
れに対向する転写ローラとを具備する画像形成装置に関
するものである。
【０００２】
【従来の技術】対向配置された感光体ドラムと転写ロー
ラとの間に転写紙を通しつつ上記転写ローラにバイアス
を印加することにより，上記感光体ドラム表面のトナー
像を転写紙に転写するようにした画像形成装置において
は，感光体ドラムと転写ローラとの間の位置決め精度が
画質に与える影響は極めて大きい。ところで，従来の一
般的な画像形成装置では，例えば感光体ドラムはドラム
ハウジングに取り付けられ，更にドラムハウジングは作
像フレームに，作像フレームは本体フレームに取り付け
られていた。また，転写ローラは上記本体フレームの曲
げ部分に取り付けられた位置決め部材により支持されて
いた。即ち，感光体ドラムと転写ローラとの位置決め
は，ドラムハウジング，作像フレーム，本体フレーム，
本体フレームの曲げ部分，及び位置決め部材を介してな
されていた。
【０００３】
【発明が解決しようとする課題】このように，上記のよ
うな従来の画像形成装置では，感光体ドラムと転写ロー
ラとの間の位置決めに関して多くの部品が介在している
ため，それらの公差の累積により，感光体ドラムと転写
ローラとの間で十分な位置決め精度を確保できないとい
う問題点があった。本発明は，上記事情に鑑みてなされ
たものであり，その目的とするところは，感光体ドラム
と転写ローラとの間で十分な位置決め精度を確保するこ
とが可能な画像形成装置を提供することである。
【０００４】
【課題を解決するための手段】上記目的を達成するため
に本発明は，感光体ドラムとこれに対向する転写ローラ
とを具備する画像形成装置において，上記感光体ドラム
側に対して開閉自在に構成され前記転写ローラを浮動状
に支持する搬送ガイドと，上記感光体ドラムのハウジン
グと一体的に形成され上記搬送ガイドを閉じた状態で上
記転写ローラの支持軸を位置決めする位置決め部材と，
上記転写ローラの転写紙搬送方向上流側近傍で転写紙を
案内する部材であり，上記転写ローラの支持軸に回動可
能に支持されるとともに上記感光体ドラム側へ弾性付勢
され，上記搬送ガイドを閉じた状態でその一部が上記記
感光体ドラムのハウジング若しくはその支持部材に弾性
的に押し当てられることにより位置決めされる転写前ガ
イド部材と，を有してなることを特徴とする画像形成装
置として構成されている。これにより，感光体ドラムと
転写ローラとの間の位置決め精度に影響を与えるのは上
記ハウジングの公差のみとなり，十分な位置決め精度を
確保することが可能となるので，量産時のバラツキなく
安定した性能を維持できる。さらに，上記転写ローラと
共に上記転写前ガイド部材についても上記感光体ドラム
に対して正確に位置決めされるため，転写紙は常に転写
ローラと感光体ドラムの対向部に正確に案内され，搬送
不良による紙詰まりや画像不良が防止できる。また，ジ
ャム処理時やメンテナンス時には上記搬送ガイドの開放
によって上記転写ローラを上記感光体ドラムから離間さ
せることができるため，作業を容易化することができ
る。
【０００５】
【発明の実施の形態】以下添付図面を参照して，本発明
の実施の形態及び実施例につき説明し，本発明の理解に
供する。尚，以下の実施の形態及び実施例は本発明を具
体化した一例であって，本発明の技術的範囲を限定する
性格のものではない。ここに，図１は本発明の実施の形
態に係る画像形成装置に搭載されるドラムハウジング１
の形状を示す正面図（ａ）及び側面図（ｂ），図２は上
記ドラムハウジング１とその周辺部材との関係を示す図
である。
【０００６】本実施の形態に係る画像形成装置では，図
２に示すように，感光体ドラム１１は作像フレーム３に
より支持されるドラムハウジング１に取り付けられてい
る。また，上記感光体ドラム１１に対向配置される転写
ローラ１２は，矢印のように開閉可能な搬送ガイド４に
より浮動状に支持されている。これにより，ジャム処理
時などには上記搬送ガイド４と共に転写ローラ１２を感
光体ドラム１１から離間させることができ，容易に作業
を行うことができる。また，上記搬送ガイド４を閉じた
状態では，上記転写ローラ１２は，上記ドラムハウジン
グ１と一体的に形成された位置決め部材２によって上記
感光体ドラム１１に対して正確に位置決めされる。
【０００７】上記転写ローラ１２の位置決めに関する構
成を，上記ドラムハウジング１の詳細を示す図１を用い
て更に詳しく説明する。図１（ａ）に示すように，上記
感光体ドラム１１はその支軸１１ａにおいてドラムハウ
ジング１の側板１ａ，１ａにより支持されている。ま
た，上記転写ローラ１２を位置決めする上記位置決め部
材２は，上記ドラムハウジング１の側板１ａの延長部分
に一体的に形成されている。上記位置決め部材２は，図
１（ｂ）に示すように上記転写ローラ１２の移動方向の
一か所が開放されたコの字型の側壁２ａを有しており，
上記搬送ガイド４（図１）を閉じた状態では，上記搬送
ガイド４に浮動状に支持されている上記転写ローラ１２
両端の支軸１２ａ，１２ａが，上記コの字型の側壁２ａ
の間の所定位置に嵌合される。これにより，上記転写ロ
ーラ１２は上記感光体ドラム１１に対して正確に位置決
めされる。このように，転写ローラ１２の位置決め部材
２が，感光体ドラム１１を支持するドラムハウジング１
に一体的に形成されているため，感光体ドラム１１と転
写ローラ１２との間の位置決め精度に影響を与えるのは
ドラムハウジングの公差のみとなり，十分な位置決め精
度を確保することが可能となる。これにより，量産時の
バラツキなく安定した性能を維持できる。
【０００８】更に，本実施の形態に係る画像形成装置で
は，図２に示すように，上記搬送ガイド４の上記転写ロ
ーラ１２の転写紙搬送方向上流側近傍に，図示しない転
写紙トレーなどから搬送される転写紙を上記転写ローラ
１２と上記感光体ドラム１１との対向部に案内するため
の転写前ガイド部材１３が，上記転写ローラ１２の回転
中心を支点として回動可能に取り付けられている。上記
転写前ガイド部材１３は，搬送路の幅方向（図２の紙面
に垂直な方向）に長く形成されており，その両端には突
起部１３ａが設けられている。更に，上記転写前ガイド
部材１３は，上記突起部１３ａを上記作像フレーム３
（感光体ドラムのハウジングの支持部材の一例）に押し
付ける方向（図２における反時計回り）に弾性付勢され
ている。従って，上記搬送ガイド４を閉じた状態では，
上記転写ローラ１２の支点は上記転写ローラ１２と同じ
く上記位置決め部材２によって上記感光体ドラム１１に
対して正確に位置決めされると共に，更に上記突起部１
３ａは上記作像フレーム３に押し付けられて位置決めさ
れる。即ち，上記搬送ガイド４を閉じることにより，上
記転写前ガイド部材１３は上記感光体ドラム１１と転写
ローラ１２との対向部に対して正確に位置決めされる。
これにより，転写紙は常に感光体ドラム１１と転写ロー
ラ１２との対向部に正確に案内され，搬送不良による紙
詰まりや画像不良が防止できる。
【０００９】以上のように，本実施の形態に係る画像形
成装置では，転写ローラ１２の位置決め部材２が，感光
体ドラム１１を支持するドラムハウジング１に一体的に
形成されているため，感光体ドラム１１と転写ローラ１
２との間の位置決め精度に影響を与えるのはドラムハウ
ジングの公差のみとなり，十分な位置決め精度を確保す
ることが可能となる。これにより，量産時のバラツキな
く安定した性能を維持できる。更に，転写紙を案内する
転写前ガイド部材１３が，上記転写ローラ１２の回転中
心を支点として上記作像フレーム３の方向に弾性付勢さ
れた状態で取り付けられると共に，上記転写前ガイド部
材１３は，上記搬送ガイド４を閉じた時に，上記突起部
１３ａが上記作像フレーム３に弾性的に押し当てられる
ことにより位置決めされるように構成されているため，
上記転写前ガイド部材１３は上記感光体ドラム１１と転
写ローラ１２との対向部に対して正確に位置決めされ，
搬送不良による紙詰まりや画像不良が防止できる。
【００１０】
【実施例】上記実施の形態では，上記位置決め部材２
が，上記転写ローラ１２の支軸１２ａを直接支持するも
のとしたが，この場合，転写ローラ１２の回転によって
上記支軸１２が上記位置決め部材２に対して摺動するた
め，両者の摩擦によって出た削りカスによる周囲の汚
れ，回転不良，隙間の増大による位置決め精度の劣化等
が懸念される。また，上記位置決め部材２は上記支軸１
２ａを取り外し自在に支持する構成とする必要があるた
め，摺動性の良い構造とすることは難しい。そこで，例
えば上記転写ローラ１２の支軸１２ａの両端に軸受部材
を回転自在に嵌入し，上記軸受部材を上記位置決め部材
２に嵌合させるようにすることも可能である。この場
合，上記軸受部材は上記支軸１２ａに常に嵌合させてお
けるため，摺動性の良い構造とすることは容易である。
これにより，転写ローラ１２の回転によって各部の間に
大きな摩擦が生じることはなく，削りカスによる周囲の
汚れ，回転不良，隙間の増大による位置決め精度の劣化
等の不具合を防止できる。また，上記軸受部材は容易に
交換することが可能である。
【００１１】
【発明の効果】以上説明したように，本発明は，感光体
ドラムとこれに対向する転写ローラとを具備する画像形
成装置において，上記感光体ドラム側に対して開閉自在
に構成され前記転写ローラを浮動状に支持する搬送ガイ
ドと，上記感光体ドラムのハウジングと一体的に形成さ
れ上記搬送ガイドを閉じた状態で上記転写ローラの支持
軸を位置決めする位置決め部材と，上記転写ローラの転
写紙搬送方向上流側近傍で転写紙を案内する部材であ
り，上記転写ローラの支持軸に回動可能に支持されると
ともに上記感光体ドラム側へ弾性付勢され，上記搬送ガ
イドを閉じた状態でその一部が上記記感光体ドラムのハ
ウジング若しくはその支持部材に弾性的に押し当てられ
ることにより位置決めされる転写前ガイド部材と，を有
してなることを特徴とする画像形成装置として構成され
ているため，感光体ドラムと転写ローラとの間の位置決
め精度に影響を与えるのは上記ハウジングの公差のみと
なり，十分な位置決め精度を確保することが可能とな
る。これにより，量産時のバラツキなく安定した性能を
維持できる。更に，上記転写ローラと共に上記転写前ガ
イド部材についても上記感光体ドラムに対して正確に位
置決めされるため，転写紙は常に転写ローラと感光体ド
ラムの対向部に正確に案内され，搬送不良による紙詰ま
りや画像不良が防止できる。また，ジャム処理時やメン
テナンス時には上記搬送ガイドの開放によって上記転写
ローラを上記感光体ドラムから離間させることができる
ため，作業を容易化することができる。 Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus including a photosensitive drum and a transfer roller facing the photosensitive drum. 2. Description of the Related Art A toner image on the surface of a photosensitive drum is applied to the transfer paper by applying a bias to the transfer roller while passing the transfer paper between a photoreceptor drum and a transfer roller which are arranged opposite to each other. In an image forming apparatus that performs transfer, the positioning accuracy between the photosensitive drum and the transfer roller greatly affects the image quality. By the way, in a conventional general image forming apparatus, for example, the photosensitive drum is mounted on a drum housing, the drum housing is further mounted on an image forming frame, and the image forming frame is mounted on a main body frame. Further, the transfer roller is supported by a positioning member attached to the bent portion of the main body frame. That is, the positioning of the photosensitive drum and the transfer roller is performed by the drum housing, the image forming frame,
This is done via the bent portion of the main body frame and the positioning member. [0003] As described above, in the conventional image forming apparatus as described above, since many components are interposed for positioning between the photosensitive drum and the transfer roller, these components are not provided. There is a problem that sufficient positioning accuracy cannot be ensured between the photosensitive drum and the transfer roller due to the accumulation of the tolerances. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an image forming apparatus capable of ensuring sufficient positioning accuracy between a photosensitive drum and a transfer roller. It is. In order to achieve the above object, the present invention relates to an image forming apparatus comprising a photosensitive drum and a transfer roller facing the photosensitive drum.
The transfer roller is configured to be openable and closable with respect to the side.
And a housing for the photosensitive drum
And the upper part with the conveyance guide closed.
A positioning member for positioning the support shaft of the transfer roller;
Transfer paper near the upstream of the transfer roller in the transfer paper transport direction
A guide member that can rotate around the support shaft of the transfer roller.
Supported and elastically biased toward the photosensitive drum side
When the transport guide is closed, a part of the
Elastic on the photosensitive drum housing or its supporting member
Pre-transfer gas that is positioned by being pressed
It is configured as an image forming apparatus characterized by comprising comprises id and member. Thus, affecting the positioning accuracy between the photosensitive drum and the transfer roller is only the tolerances of the housing, Do is possible to ensure the sufficient positioning accuracy Runode, without variations in mass production
Stable performance can be maintained. In addition, the transfer roller
Both the guide member before transfer is also the photosensitive drum.
Transfer paper is always transferred to
Accurately guided by the opposing part of the roller and the photosensitive drum, and transported
Paper jams and image defects due to defects can be prevented. Also,
Open the above transport guide during jam processing and maintenance
The transfer roller is separated from the photosensitive drum by
Work can be facilitated.
You. [0005] Embodiments and examples of the present invention will be described below with reference to the accompanying drawings to provide an understanding of the present invention. The following embodiments and examples are mere examples embodying the present invention, and do not limit the technical scope of the present invention. FIG. 1 shows a drum housing 1 mounted on an image forming apparatus according to an embodiment of the present invention.
2A and 2B are a front view and a side view showing the shape of the drum housing, and FIG. 2 is a view showing the relationship between the drum housing 1 and its peripheral members. In the image forming apparatus according to the present embodiment, as shown in FIG. 2, a photosensitive drum 11 is mounted on a drum housing 1 supported by an image forming frame 3. Further, the transfer roller 12 arranged opposite to the photosensitive drum 11 is supported in a floating manner by a transport guide 4 which can be opened and closed as indicated by an arrow. Accordingly, the transfer roller 12 and the transfer guide 4 can be separated from the photosensitive drum 11 at the time of a jam clearance or the like, and the work can be easily performed. When the transport guide 4 is closed, the transfer roller 12 is accurately positioned with respect to the photosensitive drum 11 by the positioning member 2 formed integrally with the drum housing 1. The structure relating to the positioning of the transfer roller 12 will be described in more detail with reference to FIG. As shown in FIG. 1A, the photosensitive drum 11 is supported by side plates 1a of the drum housing 1 on a support shaft 11a. The positioning member 2 for positioning the transfer roller 12 is formed integrally with an extension of the side plate 1a of the drum housing 1. As shown in FIG. 1B, the positioning member 2 has a U-shaped side wall 2a that is open at one position in the moving direction of the transfer roller 12.
When the transfer guide 4 (FIG. 1) is closed, the transfer roller 12 supported by the transfer guide 4 in a floating state.
The support shafts 12a at both ends are formed in the U-shaped side wall 2a.
Is fitted at a predetermined position. Thus, the transfer roller 12 is accurately positioned with respect to the photosensitive drum 11. As described above, the positioning member 2 of the transfer roller 12 serves as the drum housing 1
Since only the tolerance of the drum housing affects the positioning accuracy between the photosensitive drum 11 and the transfer roller 12, it is possible to secure sufficient positioning accuracy. As a result, stable performance can be maintained without variation during mass production. Further, in the image forming apparatus according to the present embodiment, as shown in FIG. 2, the transfer guide 4 is transported from a transfer paper tray (not shown) near the upstream side of the transfer roller 12 in the transfer paper transport direction. A pre-transfer guide member 13 for guiding the transfer paper to be transferred to the opposing portion between the transfer roller 12 and the photosensitive drum 11 is rotatably mounted about the rotation center of the transfer roller 12 as a fulcrum. The pre-transfer guide member 13 is formed to be long in the width direction of the transport path (the direction perpendicular to the plane of FIG. 2), and has projections 13a at both ends. Further, the pre-transfer guide member 13 connects the projection 13a to the image forming frame 3.
It is elastically urged in a direction (counterclockwise in FIG. 2) of pressing against (an example of a support member of the housing of the photosensitive drum). Therefore, when the transport guide 4 is closed,
The fulcrum of the transfer roller 12 is accurately positioned with respect to the photosensitive drum 11 by the positioning member 2 in the same manner as the transfer roller 12, and the fulcrum 1
3a is pressed against the image forming frame 3 and positioned. That is, by closing the transport guide 4, the pre-transfer guide member 13 is accurately positioned with respect to the opposing portion between the photosensitive drum 11 and the transfer roller 12.
As a result, the transfer paper is always accurately guided to the opposing portion between the photosensitive drum 11 and the transfer roller 12, so that a paper jam or an image defect due to a conveyance failure can be prevented. As described above, in the image forming apparatus according to the present embodiment, since the positioning member 2 of the transfer roller 12 is formed integrally with the drum housing 1 supporting the photosensitive drum 11, the photosensitive member Drum 11 and transfer roller 1
Only the tolerance of the drum housing affects the positioning accuracy between the two, and it is possible to secure sufficient positioning accuracy. As a result, stable performance can be maintained without variation during mass production. Further, a pre-transfer guide member 13 for guiding the transfer paper is attached while being elastically biased in the direction of the image forming frame 3 with the rotation center of the transfer roller 12 as a fulcrum. When the transport guide 4 is closed, the protrusion 13a is configured to be positioned by being elastically pressed against the image forming frame 3,
The pre-transfer guide member 13 is accurately positioned with respect to the opposing portion between the photosensitive drum 11 and the transfer roller 12, and
Paper jams and image defects due to poor transport can be prevented. [0010] In the above embodiment, the positioning member 2
However, the support shaft 12a of the transfer roller 12 is directly supported. However, in this case, the support shaft 12 slides on the positioning member 2 by the rotation of the transfer roller 12, so that the support shaft 12a comes out due to friction between the two. There is a concern that contamination of the surrounding area due to shavings, poor rotation, and deterioration of positioning accuracy due to an increase in the clearance may occur. The positioning member 2 is provided on the support shaft 1.
Since it is necessary to adopt a configuration in which the 2a is detachably supported, it is difficult to provide a structure having good slidability. Therefore, for example, a bearing member may be rotatably fitted to both ends of the support shaft 12a of the transfer roller 12, and the bearing member may be fitted to the positioning member 2. In this case, since the bearing member can always be fitted to the support shaft 12a, it is easy to provide a structure having good slidability.
As a result, large friction does not occur between the respective parts due to the rotation of the transfer roller 12, and problems such as contamination of the surroundings due to shavings, poor rotation, and deterioration of positioning accuracy due to an increase in the gap can be prevented. Further, the bearing member can be easily replaced. As described above, the present invention relates to an image forming apparatus including a photosensitive drum and a transfer roller opposed thereto, which can be freely opened and closed with respect to the photosensitive drum.
Conveying guide configured to support the transfer roller in a floating state.
And a housing integrally formed with the photosensitive drum housing.
The transfer roller is supported with the transfer guide closed.
A positioning member for positioning the shaft, and a rotation of the transfer roller described above.
A member for guiding the transfer paper near the upstream side in the copying paper transport direction.
And is rotatably supported by the support shaft of the transfer roller.
Both are elastically biased toward the photosensitive drum side, and
When the lid is closed, a part of it is
Elastically pressed against the housing or its support
And a pre-transfer guide member positioned by
Because it is constituted as an image forming apparatus characterized by being, it affects the positioning accuracy between the photosensitive drum and the transfer roller is only the tolerances of the housing, to ensure a sufficient positioning accuracy It becomes possible. As a result, stable performance can be maintained without variation during mass production. Further, together with the transfer roller, the pre-transfer
The guide member is also accurately positioned with respect to the photosensitive drum.
The transfer paper is always fixed to the transfer roller and photoconductor
The paper is accurately guided to the opposite part of the ram, and
And image defects can be prevented. Also, when clearing jams or
During maintenance, the transfer is performed by opening the transport guide.
The roller can be separated from the photosensitive drum
Therefore, work can be facilitated.
【図面の簡単な説明】
【図１】 本発明の実施の形態に係る画像形成装置に搭
載されるドラムハウジング１の形状を示す正面図（ａ）
及び側面図（ｂ）。
【図２】 上記ドラムハウジング１とその周辺部材との
関係を示す図。
【符号の説明】
１…ドラムハウジング
２…位置決め部材
４…搬送ガイド
１１…感光体ドラム
１２…転写ローラ
１３…転写前ガイド部材
１３ａ…突起部BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view (a) showing a shape of a drum housing 1 mounted on an image forming apparatus according to an embodiment of the present invention.
And a side view (b). FIG. 2 is a diagram showing a relationship between the drum housing 1 and peripheral members thereof. DESCRIPTION OF SYMBOLS 1 ... Drum housing 2 ... Positioning member 4 ... Transport guide 11 ... Photoconductor drum 12 ... Transfer roller 13 ... Pre-transfer guide member 13a ... Protrusion
───────────────────────────────────────────────────── フロントページの続き (72)発明者 森田 孝和 大阪市中央区玉造１丁目２番28号三田工 業株式会社内 (72)発明者 井藤 浩志 大阪市中央区玉造１丁目２番28号三田工 業株式会社内 (72)発明者 穂園 智英 大阪市中央区玉造１丁目２番28号三田工 業株式会社内 (56)参考文献 特開 平８−30054（ＪＰ，Ａ) 特開 平５−323806（ＪＰ，Ａ) 特開 平４−66963（ＪＰ，Ａ) 特開 平10−104959（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) G03G 15/00 550 G03G 21/16 - 21/18 G03G 15/16 - 15/16 103 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takakazu Morita 1-2-2, Tamazo, Chuo-ku, Osaka-shi Inside Mita Corporation (72) Inventor Hiroshi Ito 1-2-2, Tamazo, Chuo-ku, Osaka-shi Mita Within the Industrial Co., Ltd. (72) Tomohide Hozono, Mita Kogyo Co., Ltd. 1-2-2, Tamazo, Chuo-ku, Osaka-shi (56) References JP-A-8-30054 (JP, A) -323806 (JP, A) JP-A-4-66963 (JP, A) JP-A-10-104959 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) G03G 15/00 550 G03G 21/16-21/18 G03G 15/16-15/16 103
Claims (1)
ラとを具備する画像形成装置において，上記感光体ドラム側に対して開閉自在に構成され前記転
写ローラを浮動状に支持する搬送ガイドと， 上記感光体ドラムのハウジングと一体的に形成され上記
搬送ガイドを閉じた状態で上記転写ローラの支持軸を位
置決めする位置決め部材と， 上記転写ローラの転写紙搬送方向上流側近傍で転写紙を
案内する部材であり，上記転写ローラの支持軸に回動可
能に支持されるとともに上記感光体ドラム側へ弾性付勢
され，上記搬送ガイドを閉じた状態でその一部が上記記
感光体ドラムのハウジング若しくはその支持部材に弾性
的に押し当てられることにより位置決めされる転写前ガ
イド部材と， を有してなる ことを特徴とする画像形成装置。(57) An image forming apparatus including a photosensitive drum and a transfer roller facing the photosensitive drum, wherein the image forming apparatus is configured to be openable and closable with respect to the photosensitive drum.
A conveyance guide for supporting the copying roller in a floating state, and a housing formed integrally with the housing of the photosensitive drum.
With the transport guide closed, lower the transfer roller support shaft.
The transfer sheet is located near the upstream of the transfer roller in the transfer sheet transfer direction with the positioning member to be positioned.
A guide member that can rotate around the support shaft of the transfer roller.
Supported and elastically biased toward the photosensitive drum side
When the transport guide is closed, a part of the
Elastic on the photosensitive drum housing or its supporting member
Pre-transfer gas that is positioned by being pressed
An image forming apparatus characterized by having id and member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34567299A JP3442709B2 (en) | 1999-12-06 | 1999-12-06 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34567299A JP3442709B2 (en) | 1999-12-06 | 1999-12-06 | Image forming device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001166666A JP2001166666A (en) | 2001-06-22 |
| JP3442709B2 true JP3442709B2 (en) | 2003-09-02 |
Family
ID=18378192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34567299A Expired - Fee Related JP3442709B2 (en) | 1999-12-06 | 1999-12-06 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3442709B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100633097B1 (en) | 2005-07-22 | 2006-10-11 | 삼성전자주식회사 | Image forming process module and image forming apparatus having the same |
-
1999
- 1999-12-06 JP JP34567299A patent/JP3442709B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001166666A (en) | 2001-06-22 |
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