JP2002278317A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JP2002278317A JP2002278317A JP2001081548A JP2001081548A JP2002278317A JP 2002278317 A JP2002278317 A JP 2002278317A JP 2001081548 A JP2001081548 A JP 2001081548A JP 2001081548 A JP2001081548 A JP 2001081548A JP 2002278317 A JP2002278317 A JP 2002278317A
- Authority
- JP
- Japan
- Prior art keywords
- transfer
- image forming
- transfer member
- forming apparatus
- image carrier
- 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.)
- Granted
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)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は，転写部材により像
担持体に転写材を圧接させてトナー像を該記転写材に転
写する画像形成装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus for transferring a toner image onto a transfer material by pressing a transfer material against an image carrier by a transfer member.
【０００２】[0002]
【従来の技術】画像形成装置の一例である複写機等にお
いては，感光ドラム（像担持体の一例）の周面に形成さ
れたトナー像を紙等（転写材の一例）に転写するため，
転写ローラ（転写部材の一例）に近接させたペーパーガ
イド（案内部材の一例）により上記紙等を所定の転写位
置に導き，上記転写ローラにより，回転する上記感光ド
ラムの周面の一部に紙等を圧接させて上記トナー像を転
写する。この際，上記紙等への転写画像の画質を一定以
上に保つためには，上記感光ドラムに対して上記転写ロ
ーラや上記ペーパーガイド等を精度良く位置決めする必
要がある。一方，上記転写ローラと上記感光ドラムや上
記ペーパーガイドとの間への紙詰まり発生時や転写ロー
ラ周面の汚れ発生等の際，詰まった紙等の除去や上記転
写ローラ周面の清掃等のメンテナンスが必要となる。そ
のため，上記転写ローラと上記転写ローラに近接した上
記ペーパーガイドとを離間可能に支持ことが必要であ
り，その離間が容易であることが望ましい。このような
ニーズから，特開平１１−９３９４０号（従来技術甲）
に，上記転写ローラを着脱容易に支持する方法として，
上記転写ローラの回転軸の端部に非円形断面の小径部を
具備したカラー及び取手部等を設け，該取手部の操作に
よって上記小径部が着脱可能な方向に回転するよう構成
することにより，上記転写ローラの着脱を容易にするも
のが提案されている。2. Description of the Related Art In a copying machine or the like which is an example of an image forming apparatus, a toner image formed on a peripheral surface of a photosensitive drum (an example of an image carrier) is transferred to paper or the like (an example of a transfer material).
The paper or the like is guided to a predetermined transfer position by a paper guide (an example of a guide member) that is brought close to a transfer roller (an example of a transfer member), and the transfer roller applies a paper to a part of the peripheral surface of the rotating photosensitive drum. Then, the toner image is transferred. At this time, in order to maintain the image quality of the image transferred onto the paper or the like at a certain level or more, it is necessary to accurately position the transfer roller and the paper guide with respect to the photosensitive drum. On the other hand, when a paper jam occurs between the transfer roller and the photosensitive drum or the paper guide, or when the peripheral surface of the transfer roller becomes dirty, removal of the jammed paper or cleaning of the peripheral surface of the transfer roller is performed. Maintenance is required. Therefore, it is necessary to support the transfer roller and the paper guide adjacent to the transfer roller so that the transfer roller can be separated, and it is desirable that the separation be easy. To meet such needs, Japanese Patent Laid-Open No. 11-93940 (prior art A)
In order to support the transfer roller easily,
By providing a collar having a small-diameter portion with a non-circular cross section and a handle at the end of the rotation shaft of the transfer roller, and operating the handle to rotate the small-diameter portion in a detachable direction, A transfer roller has been proposed which facilitates the attachment and detachment of the transfer roller.
【０００３】[0003]
【発明が解決しようとする課題】しかし，上記従来技術
甲では，上記メンテナンス時に上記転写ローラを着脱す
る際にネジ等で上記ペーパーガイドを着脱する必要があ
り，上記メンテナンスに多くの手間を要するという問題
点があった。さらに，ネジの締め付け加減等により，上
記転写ローラと上記ペーパーガイドの位置関係にずれが
生じるという問題点も生じ得た。However, according to the prior art A, it is necessary to attach and detach the paper guide with a screw or the like when attaching and detaching the transfer roller during the maintenance, so that the maintenance requires a lot of trouble. There was a problem. Further, a problem may occur in that the positional relationship between the transfer roller and the paper guide is shifted due to the degree of tightening of the screws.
【０００４】本発明は上記事情を鑑みてなされたもので
あり、その目的とするところは、像担持体に対して転写
部材及び転写位置へ転写材を導く案内部材を精度良く位
置決めできとともに，転写部材のメンテナンスが可能な
ように，該転写部材に近接する案内部材を容易に離間で
きる画像形成装置を提供することである。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 accurately position a transfer member and a guide member for guiding a transfer material to a transfer position with respect to an image carrier. An object of the present invention is to provide an image forming apparatus capable of easily separating a guide member close to the transfer member so that maintenance of the member is possible.
【０００５】[0005]
【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，像担持体を水平な第１の回転軸を中心とし
て回転自在に支持する像担持体支持手段と，上記像担持
体上のトナー像を転写材上に転写する転写部材を上記第
１の回転軸に平行な第２の回転軸を中心として回転自在
に支持する転写部材指示手段と，上記転写部材に近接
し，上記転写材を上記転写部材による転写位置へ導く案
内部材とを有し，上記案内部材が上記転写部材支持手段
に支持されるよう構成されている。これにより，上記案
内部材が上記転写部材を支持する上記転写部材支持手段
により支持されるので，転写部材に対する案内部材の位
置決めが正確となり，転写材を転写位置に導く精度が向
上する。また，上記転写部材支持手段及び上記案内部材
は，それぞれ上記像担持体支持手段に対して当接するこ
とにより上記像担持体支持手段に対して位置決めされる
よう構成することも考えられる。これにより，上記転写
部材支持手段及び上記案内部材が上記像担持体支持手段
に対して高精度に位置決めされ，その結果，上記転写部
材及び案内部材の像担持体に対する高精度の位置決めが
なされ，転写画像の画質が一定以上に保たれる。また，
上記案内部材が上記転写部材支持手段により所定の揺動
範囲で揺動可能に支持され，上記転写部材支持手段を上
記像担持体支持手段から離間させたとき，上記案内部材
が揺動して上記転写部材から離間した位置に揺動するよ
うに構成することも考えられる。これにより，上記転写
部材支持手段と上記像担持体支持手段を離間させて，転
写材通路のメンテナンスを行う際に，上記案内部材が転
写部材から離間するので，転写位置のメンテナンスが容
易となる。In order to achieve the above object, the present invention provides an image carrier supporting means for rotatably supporting an image carrier about a first horizontal rotation axis, and the image carrier. Transfer member indicating means for rotatably supporting a transfer member for transferring the upper toner image onto the transfer material about a second rotation axis parallel to the first rotation axis; A guide member for guiding the transfer material to a transfer position by the transfer member, wherein the guide member is supported by the transfer member supporting means. Thus, since the guide member is supported by the transfer member supporting means for supporting the transfer member, the positioning of the guide member with respect to the transfer member becomes accurate, and the accuracy of guiding the transfer material to the transfer position is improved. It is also conceivable that the transfer member support means and the guide member are configured to be positioned with respect to the image carrier support means by abutting against the image carrier support means, respectively. As a result, the transfer member support means and the guide member are positioned with high precision with respect to the image carrier support means. As a result, the transfer member and the guide member are positioned with high precision with respect to the image carrier, and the transfer is performed. The image quality of the image is kept above a certain level. Also,
The guide member is swingably supported by the transfer member support means within a predetermined swing range. When the transfer member support means is separated from the image carrier support means, the guide member swings and the guide member swings. It is also conceivable to configure so as to swing to a position separated from the transfer member. Accordingly, when the transfer member supporting means and the image carrier supporting means are separated from each other and the transfer material path is maintained, the guide member is separated from the transfer member, so that the maintenance of the transfer position is facilitated.
【０００６】[0006]
【発明の実施の形態】以下添付図面を参照しながら、本
発明の実施の形態及び実施例について説明し、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Ａのカバー部を開いた状
態の主要部の断面図，図２は本発明の実施の形態に係る
画像形成装置Ａのカバー部を閉じた状態の主要部の断面
図，図３は本発明の実施の形態に係る画像形成装置Ａの
転写装置であってペーパーガイドが開状態の斜視図，図
４は本発明の実施の形態に係る画像形成装置Ａの転写装
置であってペーパーガイドが閉状態の斜視図，図５は本
発明の実施の形態に係る画像形成装置Ａのカバー部を開
いた状態の断面図，図６は本発明の実施の形態に係る画
像形成装置Ａのカバー部を閉じた状態の断面図である。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. Here, FIG. 1 is a cross-sectional view of a main part of the image forming apparatus A according to the embodiment of the present invention with the cover part opened, and FIG. 2 is a cover part of the image forming apparatus A according to the embodiment of the present invention. FIG. 3 is a cross-sectional view of a main part of the image forming apparatus A according to the embodiment of the present invention, in which the paper guide is open, and FIG. 4 is an embodiment of the present invention. FIG. 5 is a perspective view of the transfer device of the image forming apparatus A according to the first embodiment, in which the paper guide is closed, FIG. 5 is a cross-sectional view of the image forming apparatus A according to the embodiment of the present invention, with a cover part opened, FIG. 3 is a cross-sectional view of the image forming apparatus A according to the exemplary embodiment of the present invention in a state where a cover unit is closed.
【０００７】画像形成装置Ａは，本発明の実施の形態に
係る画像形成装置の一例である複写機である。まず図５
を用いて画像形成装置Ａの概略構成を説明する。図５に
おいて向かって左側の面が画像形成装置Ａの正面であ
る。画像形成装置Ａは，大きく本体部１とカバー部６０
から構成されている。上記カバー部６０にはレール６１
が設けられており，上記カバー部６０は，上記本体部１
に支持された上記レール６１によって水平かつ画像形成
装置装置Ａの正面から上記本体部１に向かう方向（離接
方向）に離接自在に支持されている。上記カバー部６０
を上記本体部１に押し付けることによって上記カバー部
６０に回動可能に支持された掛止レバー６２が上記本体
部１に設けられた掛止ピン２に引っ掛かり，図６に示す
如く上記カバー部６０が上記本体部１に接合保持（カバ
ー閉状態）される。また，上記掛止レバー６２を上記掛
止ピン２から外し，上記カバー部６０を上記本体部１か
ら引き離すことによって，上記カバー部６０を上記本体
部１から離間（カバー開状態）させることができる。次
に図１を用いて画像形成装置Ａの主要部の構成を説明す
る。本体部１には，トナー像をその周面に形成する感光
ドラム１１（上記像担持体の一例）と，該感光ドラム１
１に静電荷を与える帯電装置９１と，該感光ドラム１１
周面にトナー像を形成させる現像装置９２と，トナー像
の紙等（上記転写材の一例）への転写後に残存した上記
感光ドラム１１上のトナーを除去するクリーニグ装置９
３と，紙等を下方から上方の転写位置へ送り込む給紙ロ
ーラ９４と，上記感光ドラム１１等を支持する部材であ
る本体フレーム１０（上記像担持体支持手段の一例）と
が設置されている。また，上記カバー部６０には，転写
に関わる所定の機器を支持する部材である転写装置フレ
ーム２０（上記転写部材支持手段の一例）が遊動可能に
指示され，該転写装置フレーム２０を上記離接方向から
上記本体部１に向かって押し当てる第１のスプリング３
１が設けられている。さらに，上記転写装置フレーム２
０によって，上記感光ドラム１１周面に圧接させてトナ
ー像を紙等に転写する転写ローラ２１（上記転写部材の
一例）と，上記給紙ローラ９４から送り込まれた紙等を
転写位置に導くペーパーガイド４０（上記案内部材の一
例）と，上記転写ローラ２１の回転軸２１ａを所定の方
向に押し付ける第２のスプリング３２と，トナー像転写
後の紙等から除電を行なう除電装置５０とが支持されて
おり，画像転写装置２２を構成している。The image forming apparatus A is a copying machine which is an example of the image forming apparatus according to the embodiment of the present invention. First, FIG.
The schematic configuration of the image forming apparatus A will be described with reference to FIG. 5 is the front of the image forming apparatus A. The image forming apparatus A includes a main body 1 and a cover 60.
It is composed of The cover part 60 has a rail 61.
The cover 60 is provided with the main body 1.
The main body 1 is horizontally and detachably supported by the rails 61 supported in the direction (separation direction) from the front of the image forming apparatus A toward the main body 1. The cover part 60
Is pressed against the main body 1, the locking lever 62 rotatably supported by the cover 60 is hooked on the locking pin 2 provided on the main body 1, and as shown in FIG. Are joined and held to the main body 1 (cover closed state). Further, the cover lever 60 is detached from the lock pin 2 and the cover part 60 is separated from the main body part 1 so that the cover part 60 can be separated from the main body part 1 (cover open state). . Next, a configuration of a main part of the image forming apparatus A will be described with reference to FIG. The main body 1 includes a photosensitive drum 11 (an example of the image carrier) for forming a toner image on a peripheral surface thereof,
A charging device 91 for applying an electrostatic charge to the photosensitive drum 11;
A developing device 92 for forming a toner image on the peripheral surface; and a cleaning device 9 for removing the toner on the photosensitive drum 11 remaining after the transfer of the toner image to paper or the like (an example of the transfer material).
3, a paper feed roller 94 for feeding paper or the like from a lower position to an upper transfer position, and a main body frame 10 (an example of the image carrier supporting means) which is a member for supporting the photosensitive drum 11 and the like. . Further, a transfer device frame 20 (an example of the transfer member supporting means), which is a member for supporting a predetermined device related to transfer, is instructed to be freely movable on the cover unit 60, and the transfer device frame 20 is detached from and connected to the transfer device frame 20. 1st spring 3 which presses toward the above-mentioned main part 1 from the direction.
1 is provided. Further, the transfer device frame 2
0, a transfer roller 21 (an example of the transfer member) for transferring the toner image to paper or the like by pressing against the peripheral surface of the photosensitive drum 11 and a paper for guiding the paper or the like fed from the paper feed roller 94 to a transfer position. A guide 40 (an example of the guide member), a second spring 32 for pressing the rotating shaft 21a of the transfer roller 21 in a predetermined direction, and a charge removing device 50 for removing charge from paper or the like after transfer of the toner image are supported. And constitutes the image transfer device 22.
【０００８】上記感光ドラム１１は上記本体フレーム１
０によって水平かつ上記離接方向に直交する回転軸１１
ａ（第１の回転軸）を中心として回転自在に支持されて
おり，その周りに上記帯電装置９１，現像装置９２，ク
リーニグ装置９３等が配置され，上記感光ドラム１１の
下部に上記給紙ローラ９４が配置されている。上記転写
装置フレーム２０には，上記本体部１に向かって突設さ
れた嵌入ピン２０ｃが設けられており，該嵌入ピン２０
ｃを嵌入させる嵌入孔１０ｃが上記本体フレーム１０に
設けられている。上記嵌入孔１０ｃは，上記嵌入ピン２
０ｃが嵌入されたときに，上記嵌入ピン２０ｃの上面及
び下面が上記嵌入孔１０ｃの内面に接する形状に形成さ
れている。上記転写装置フレーム２０には，上記カバー
閉状態で上記本体部１の一部である第１の当接面１０ａ
に当接する半球状の当接部２０ａが設けられており，上
記ペーパーガイド４０にも同様に上記本体部１の当接面
１０ｂに当接する当接部４０ｂが設けられている。上記
転写装置フレーム２０は上記カバー部６０によって上記
離接方向に摺動可能に支持されている。上記第１のスプ
リング３１は，垂直方向に見て上記当接部２０ａと４０
ｂの間に設けられ，その一端が上記カバー部６０に支持
され，残りの一端が上記転写装置フレーム２０を上記離
接方向から上記本体部１に向かって押し付けるよう設置
されている。上記転写ローラ２１の周面には，紙等を上
記感光ドラム１１周面に密接させることができるようウ
レタンゴム等の発泡材が施されている。上記転写ローラ
２１は，上記感光ドラム１１の回転軸１１ａに平行な回
転軸２１ａ（第２の回転軸）を有し，該第２の回転軸２
１ａは，上記転写装置フレーム２０に施された上記第２
の回転軸２１ａの直径と略等しい幅の溝部２０ｄにより
回転自在にかつ斜め上方に向かって摺動可能に支持され
ている。そして，上記第２のスプリング３２の一端が上
記溝部２２ｄに支持され，残りの一端が上記第２の回転
軸を斜め上方に向かって押し上げるよう構成されてい
る。上記回転軸２１ａの上記摺動方向は，上記カバー閉
状態において上記感光ドラム１１の回転軸１１ａに向か
う方向に設定されている。また，上記第１及び第２のス
プリング３１，３２は，該第２のスプリング３２による
離接方向の押圧力が，該第１のスプリング３１による離
接方向の押圧力よりも小さくなるように選定されてい
る。上記ペーパーガイド４０は，上記転写装置フレーム
２０によって上記感光ドラム１１の回転軸１１ａに平行
な軸４０ａの回りに所定の回動範囲で上下に回動可能に
支持されている。上記転写ローラ２１の上部に近接支持
された上記除電装置５０は，高電圧を印加した放電尖端
電極等であり，上記転写装置フレーム２０に支持されて
いる。上記転写装置フレーム２０と上記ペーパーガイド
４０と上記除電装置５０とは，図３に示す如く，上記転
写ローラ２１の回転軸２１ａ方向に沿って上記転写ロー
ラ２１の両端まで延びており，上記嵌入ピン２０ｃと上
記当接部２０ａ及び４０ｂは，上記転写ローラ２１の両
端部に各々２つ設けられている。The photosensitive drum 11 is mounted on the main body frame 1.
0, the rotation axis 11 which is horizontal and orthogonal to the direction of separation
a (first rotation axis), the charging device 91, the developing device 92, the cleaning device 93, etc., are arranged around the rotatable member a. 94 are arranged. The transfer device frame 20 is provided with a fitting pin 20 c protruding toward the main body 1.
The main body frame 10 is provided with a fitting hole 10c for fitting c. The insertion hole 10c is provided with the insertion pin 2
When 0c is fitted, the upper surface and the lower surface of the fitting pin 20c are formed in a shape to be in contact with the inner surface of the fitting hole 10c. The transfer device frame 20 has a first contact surface 10a which is a part of the main body 1 in the cover closed state.
The paper guide 40 is also provided with a contact portion 40b that contacts the contact surface 10b of the main body 1 in the same manner. The transfer device frame 20 is supported by the cover portion 60 so as to be slidable in the separation / contact direction. The first spring 31 is provided between the contact portions 20a and 40a when viewed in the vertical direction.
b, one end of which is supported by the cover part 60, and the other end is installed so as to press the transfer device frame 20 toward the main body part 1 from the separation / contact direction. A foam material such as urethane rubber is applied to the peripheral surface of the transfer roller 21 so that paper or the like can be brought into close contact with the peripheral surface of the photosensitive drum 11. The transfer roller 21 has a rotating shaft 21 a (second rotating shaft) parallel to the rotating shaft 11 a of the photosensitive drum 11, and the second rotating shaft 2
1a is the second device provided on the transfer device frame 20.
Are supported rotatably and slidably obliquely upward by a groove 20d having a width substantially equal to the diameter of the rotating shaft 21a. One end of the second spring 32 is supported by the groove 22d, and the other end is configured to push the second rotating shaft obliquely upward. The sliding direction of the rotating shaft 21a is set to a direction toward the rotating shaft 11a of the photosensitive drum 11 in the cover closed state. The first and second springs 31 and 32 are selected such that the pressing force of the second spring 32 in the separating direction is smaller than the pressing force of the first spring 31 in the separating direction. Have been. The paper guide 40 is supported by the transfer device frame 20 so as to be rotatable up and down around a shaft 40a parallel to the rotation shaft 11a of the photosensitive drum 11 within a predetermined rotation range. The static eliminator 50 supported close to the upper portion of the transfer roller 21 is a discharge tip electrode or the like to which a high voltage is applied, and is supported by the transfer device frame 20. As shown in FIG. 3, the transfer device frame 20, the paper guide 40, and the static eliminator 50 extend to both ends of the transfer roller 21 along the direction of the rotation shaft 21a of the transfer roller 21, and the fitting pin The two transfer rollers 21 are provided at both ends of the transfer roller 21.
【０００９】上記ペーパーガイド４０は，上記カバー部
６０を引き出して上記カバー開状態としたときに，上記
ペーパーガイド４０が自重により上記回動範囲の下端側
へ回動し，上記転写ローラ２１から離間した状態で保持
する（ペーパーガイド開状態）ように上記転写装置フレ
ーム２０によって回動可能に支持されている。図３に上
記転写装置フレーム２０及びこれに支持された転写ロー
ラ２１等により構成される上記転写装置２２の上記ペー
パーガイド開状態の斜視図を示す。このように上記カバ
ー部６０を開くと，上記転写ローラ２１と上記感光ドラ
ム１１及び上記ペーパーガイド４０が離間し，上記転写
ローラ２１の周面が広く露出するので，紙詰まり発生時
の紙の除去や上記転写ローラ２１の周面の清掃等のメン
テナンス作業が容易となる。また，上記カバー部６０を
押して上記本体部１に近接させると，前記嵌入ピン２０
ｃが前記嵌入孔１０ｃに嵌入するとともに，上記ペーパ
ーガイド４０の一部が上記本体部１の当接面１０ｂに当
接して上記回動範囲の上端側へ回動する。さらに上記カ
バー閉状態まで上記カバー部６０を押し付けると，図２
に示す如く，前記第２のスプリング３２の押圧によって
上記転写ローラ２１の周面の一部が上記感光ドラム１１
の周面の一部に圧接するとともに，上記当接部２０ａが
上記第１の当接面１０ａに当接する。同時に，上記当接
部４０ｂが上記第２の当接面１０ｂに当接して上記ペー
パーガイド４０の傾きが決められるとともに，上記ペー
パーガイド４０が上記回動範囲の上端側へ押し付けられ
て上記転写ローラ２１に近接保持（ペーパーガイド閉状
態）される。図４に該ペーパーガイド閉状態の前記転写
装置２２の斜視図を示す。この状態で，上記ペーパーガ
イド４０が前記給紙ローラ９４から送り込まれた紙等を
上記転写ローラ２１と上記感光ドラム１１が圧接する位
置へ精度良く導くことができる。これにより，上記嵌入
ピン２０ｃが垂直方向に拘束されることによって上記本
体フレーム１に対する上記転写装置フレーム２０の垂直
方向の位置決めがなされる。同時に，上記第１のスプリ
ング３１の押圧によって上記当接部２０ａ及び４０ｂが
上記本体フレーム１の上記当接面１０ａ，１０ｂに当接
する状態が保持され，上記本体フレーム１に対する上記
転写装置フレーム２０の上記離接方向の位置決めがなさ
れることとなる。ここで，上記離接方向における上記第
１のスプリング３１の押圧力よりも上記第２のスプリン
グ３２の押圧力の方が小さくなるよう構成しているの
で，上記第２のスプリング３２の押圧の反力によって，
上記転写装置フレーム２０が上記本体フレーム１０から
離間することはない。そして，上記感光ドラム１１は上
記本体フレーム１に，上記転写ローラ２１，上記ペーパ
ーガイド２１及び上記除電装置５０は上記転写装置フレ
ーム２０に各々支持されているため，上記感光ドラム１
１に対する上記転写ローラ２１，上記ペーパーガイド４
０及び上記除電装置５０の距離が一定に位置決めされる
こととなる。また，上記感光ドラム１１に対する上記転
写ローラ２１の圧接力は上記第２のスプリング３２の押
圧によって常に一定となる。さらに，上記第１のスプリ
ング３１の押圧位置が，垂直方向に見て上記当接部２０
ａ及び４０ｂの間となるよう構成されているので，上記
第１のスプリング３１による押圧が一方の当接部に偏る
ことがなく安定する。When the cover portion 60 is pulled out and the cover is opened, the paper guide 40 is rotated by its own weight toward the lower end of the rotation range, and is separated from the transfer roller 21. It is rotatably supported by the transfer device frame 20 so as to hold it in a state where the paper guide is opened (paper guide open state). FIG. 3 is a perspective view of the transfer device 22 including the transfer device frame 20 and the transfer roller 21 supported by the transfer device frame 20 when the paper guide is open. When the cover portion 60 is opened in this manner, the transfer roller 21 is separated from the photosensitive drum 11 and the paper guide 40, and the peripheral surface of the transfer roller 21 is widely exposed. And maintenance work such as cleaning of the peripheral surface of the transfer roller 21 is facilitated. When the cover part 60 is pushed to approach the main body part 1, the fitting pin 20
c is inserted into the insertion hole 10c, and a part of the paper guide 40 comes into contact with the contact surface 10b of the main body 1 to rotate toward the upper end of the rotation range. When the cover 60 is further pressed until the cover is closed, FIG.
As shown in FIG. 5, a part of the peripheral surface of the transfer roller 21 is moved by the pressing of the second spring 32 to the photosensitive drum 11.
Abuts against a part of the peripheral surface, and the contact portion 20a contacts the first contact surface 10a. At the same time, the abutment portion 40b abuts on the second abutment surface 10b to determine the inclination of the paper guide 40, and the paper guide 40 is pressed against the upper end side of the rotation range to thereby transfer the transfer roller. 21 (closed state of the paper guide). FIG. 4 is a perspective view of the transfer device 22 in the paper guide closed state. In this state, the paper guide 40 can accurately guide the paper or the like fed from the paper feed roller 94 to a position where the transfer roller 21 and the photosensitive drum 11 are pressed against each other. As a result, the insertion pin 20c is restrained in the vertical direction, whereby the transfer device frame 20 is vertically positioned with respect to the main body frame 1. At the same time, the state in which the contact portions 20a and 40b are in contact with the contact surfaces 10a and 10b of the main body frame 1 by the pressing of the first spring 31 is maintained, and the transfer device frame 20 with respect to the main body frame 1 is moved. The positioning in the direction of the detachment is performed. Here, the pressing force of the second spring 32 is configured to be smaller than the pressing force of the first spring 31 in the separating / contacting direction. By force
The transfer device frame 20 does not separate from the main body frame 10. The photosensitive drum 11 is supported by the main body frame 1, and the transfer roller 21, the paper guide 21, and the charge removing device 50 are supported by the transfer device frame 20.
Transfer roller 21 and paper guide 4 with respect to 1
0 and the distance between the static eliminator 50 are fixed. The pressing force of the transfer roller 21 against the photosensitive drum 11 is always constant by the pressing of the second spring 32. Further, when the pressing position of the first spring 31 is viewed in the vertical direction,
Since it is configured to be between a and 40b, the pressing by the first spring 31 is stabilized without being biased to one contact portion.
【００１０】このように，上記カバー部６０を上記本体
部１から引き出すだけで，ネジ締め等の何ら特別な操作
なしに上記感光ドラム１１と上記転写ローラ２１及び上
記ペーパーガイド４０を離間状態とすることができるた
め，詰まった紙等の除去や上記転写ローラ２１の清掃等
のメンテナンスが容易となる。さらに上記カバー部６０
を上記本体部１に押し付けるだけの容易な操作で，上記
感光ドラム１１に対する上記転写ローラ２１及び上記ペ
ーパーガイド４０並びに上記除電装置５０の距離と上記
ペーパーガイド４０の傾きを常に一定に位置決めでき
る。また，上記転写ローラ２１表面の劣化等の経時変化
にかかわらず，上記感光ドラム１１に対する上記転写ロ
ーラ２１の圧接状態を一定に維持できる。従って，紙等
への転写画像の画質が常に一定以上に保たれることとな
る。As described above, the photosensitive drum 11, the transfer roller 21, and the paper guide 40 are separated from each other only by pulling out the cover 60 from the main body 1 without any special operation such as screwing. This facilitates maintenance such as removal of jammed paper and the like and cleaning of the transfer roller 21. Further, the cover 60
The distance between the transfer roller 21, the paper guide 40, and the static eliminator 50 with respect to the photosensitive drum 11 and the inclination of the paper guide 40 can always be fixed by an easy operation of simply pressing the main body 1. Further, the pressure contact state of the transfer roller 21 against the photosensitive drum 11 can be maintained constant irrespective of a temporal change such as deterioration of the surface of the transfer roller 21. Therefore, the image quality of the image transferred to paper or the like is always kept at a certain level or more.
【００１１】上記画像形成装置Ａは複写機の例である
が，本発明を適用し得る画像形成装置としては，プリン
タ，ＦＡＸ等も含まれる。Although the image forming apparatus A is an example of a copying machine, examples of the image forming apparatus to which the present invention can be applied include a printer and a facsimile.
【００１２】[0012]
【発明の効果】以上説明したように、本発明によれば、
像担持体に対して転写部材及び転写材を転写位置へ導く
案内部材を精度良く位置決めできるため，上記転写材へ
の転写画像の画質を常に一定以上に保つことができる。
さらに，転写ローラに近接する案内部材を容易に離間さ
せることができ，転写ローラの清掃等のメンテナンスが
容易となる。As described above, according to the present invention,
Since the transfer member and the guide member for guiding the transfer material to the transfer position can be accurately positioned with respect to the image carrier, the image quality of the image transferred to the transfer material can always be maintained at a certain level or more.
Further, the guide member close to the transfer roller can be easily separated, and maintenance such as cleaning of the transfer roller becomes easy.
【図１】本発明の実施の形態に係る画像形成装置Ａのカ
バー部を開いた状態の主要部の断面図。FIG. 1 is a cross-sectional view of a main part of an image forming apparatus A according to an embodiment of the present invention with a cover part opened.
【図２】本発明の実施の形態に係る画像形成装置Ａのカ
バー部を閉じた状態の主要部の断面図。FIG. 2 is a cross-sectional view of a main part of the image forming apparatus A according to the exemplary embodiment of the present invention with a cover part closed.
【図３】本発明の実施の形態に係る画像形成装置Ａの転
写装置であってペーパーガイドが開状態の斜視図。FIG. 3 is a perspective view of the transfer device of the image forming apparatus A according to the embodiment of the present invention, in which a paper guide is in an open state.
【図４】本発明の実施の形態に係る画像形成装置Ａの転
写装置であってペーパーガイドが閉状態の斜視図。FIG. 4 is a perspective view of the transfer device of the image forming apparatus A according to the embodiment of the present invention, with a paper guide closed.
【図５】本発明の実施の形態に係る画像形成装置Ａのカ
バー部を開いた状態の断面図。FIG. 5 is a cross-sectional view of the image forming apparatus A according to the embodiment of the present invention in a state where a cover is opened.
【図６】本発明の実施の形態に係る画像形成装置Ａのカ
バー部を閉じた状態の断面図。FIG. 6 is a cross-sectional view of the image forming apparatus A according to the embodiment of the present invention in a state where a cover is closed.
１…本体部 ２…掛止ピン １０…本体フレーム １０ａ…第１の当接面 １０ｂ…第２の当接面 １０ｃ…嵌入孔 １１…感光ドラム １１ａ…第１の回転軸 ２０…転写装置フレーム ２０ａ…当接部 ２０ｃ…嵌入ピン ２０ｄ…溝部 ２１…転写ローラ ２１ａ…第２の回転軸 ２２…転写装置 ３１…第１のスプリング ３２…第２のスプリング ４０…ペーパーガイド ４０ａ…軸 ４０ｂ…当接部 ５０…除電装置 ６０…カバー部 ６１…レール ６２…掛止レバー ９１…帯電装置 ９２…現像装置 ９３…クリーニング装置 ９４…給紙ローラ DESCRIPTION OF SYMBOLS 1 ... Main body part 2 ... Hook pin 10 ... Main body frame 10a ... 1st contact surface 10b ... 2nd contact surface 10c ... Fitting hole 11 ... Photosensitive drum 11a ... 1st rotating shaft 20 ... Transfer device frame 20a .. Abutment portion 20c fitting pin 20d groove 21 transfer roller 21a second rotating shaft 22 transfer device 31 first spring 32 second spring 40 paper guide 40a shaft 40b abutting portion DESCRIPTION OF SYMBOLS 50 ... Static eliminator 60 ... Cover part 61 ... Rail 62 ... Hook lever 91 ... Charging device 92 ... Developing device 93 ... Cleaning device 94 ... Feeding roller
───────────────────────────────────────────────────── フロントページの続き (72)発明者 増田 佳昭 大阪府大阪市阿倍野区長池町22番22号シャ ープ株式会社内 Ｆターム(参考） 2H071 AA03 AA08 AA13 AA15 AA18 AA20 DA09 DA23 EA04 EA06 2H072 CB07 JA02 JA04 2H200 GA23 GB41 HA02 HA12 HB03 HB12 HB22 JA02 JA08 JA23 JA25 JA29 JB12 JB17 JB32 JB37 JB49 LA03 LA12 LA22 LA23 LA24 MA03 MA08 PA14 3F101 FA01 FB04 FE15 FE17 LA01 LA07 LB03 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yoshiaki Masuda 22-22 Nagaikecho, Abeno-ku, Osaka-shi, Osaka F-term (reference) 2H071 AA03 AA08 AA13 AA15 AA18 AA20 DA09 DA23 EA04 EA06 2H072 CB07 JA02 JA04 2H200 GA23 GB41 HA02 HA12 HB03 HB12 HB22 JA02 JA08 JA23 JA25 JA29 JB12 JB17 JB32 JB37 JB49 LA03 LA12 LA22 LA23 LA24 MA03 MA08 PA14 3F101 FA01 FB04 FE15 FE17 LA01 LA07 LB03
Claims (3)
して回転自在に支持する像担持体支持手段と，上記像担
持体上のトナー像を転写材上に転写する転写部材を上記
第１の回転軸に平行な第２の回転軸を中心として回転自
在に支持する転写部材指示手段と，上記転写部材に近接
し，上記転写材を上記転写部材による転写位置へ導く案
内部材とを有する画像形成装置において，上記案内部材
が上記転写部材支持手段に支持されてなることを特徴と
する画像形成装置。An image carrier supporting means for rotatably supporting the image carrier about a first horizontal rotation axis; and a transfer member for transferring a toner image on the image carrier onto a transfer material. A transfer member indicating means rotatably supporting a second rotation axis parallel to the first rotation axis; and a guide member which is close to the transfer member and guides the transfer material to a transfer position by the transfer member. An image forming apparatus comprising: an image forming apparatus, wherein the guide member is supported by the transfer member supporting means.
は，それぞれ上記像担持体支持手段に対して当接するこ
とにより上記像担持体支持手段に対して位置決めされる
請求項１に記載の画像形成装置。2. The image forming apparatus according to claim 1, wherein said transfer member support means and said guide member are positioned with respect to said image carrier support means by being in contact with said image carrier support means, respectively. apparatus.
より所定の揺動範囲で揺動可能に支持され，上記転写部
材支持手段を上記像担持体支持手段から離間させたと
き，上記案内部材が揺動して上記転写部材から離間した
位置に揺動するように構成された請求項２に記載の画像
形成装置。3. The guide member is supported by the transfer member support means so as to be swingable within a predetermined swing range, and when the transfer member support means is separated from the image carrier support means, the guide member is moved. The image forming apparatus according to claim 2, wherein the image forming apparatus is configured to swing and swing to a position separated from the transfer member.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001081548A JP3748784B2 (en) | 2001-03-21 | 2001-03-21 | Image forming apparatus |
| US10/060,326 US6795669B2 (en) | 2001-02-02 | 2002-02-01 | Image device with control members for rollers |
| US10/916,456 US6999698B2 (en) | 2001-02-02 | 2004-08-12 | Image device with control members for rollers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001081548A JP3748784B2 (en) | 2001-03-21 | 2001-03-21 | Image forming apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002278317A true JP2002278317A (en) | 2002-09-27 |
| JP3748784B2 JP3748784B2 (en) | 2006-02-22 |
Family
ID=18937630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001081548A Expired - Fee Related JP3748784B2 (en) | 2001-02-02 | 2001-03-21 | Image forming apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3748784B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005331606A (en) * | 2004-05-18 | 2005-12-02 | Kyocera Mita Corp | Transfer material transporting guide mechanism for image forming apparatus |
| JP2012137576A (en) * | 2010-12-27 | 2012-07-19 | Kyocera Document Solutions Inc | Image forming apparatus |
| JP2013047756A (en) * | 2011-08-29 | 2013-03-07 | Ricoh Co Ltd | Image forming apparatus |
| JP2013200357A (en) * | 2012-03-23 | 2013-10-03 | Fuji Xerox Co Ltd | Image forming apparatus and transfer unit |
| JP2017033013A (en) * | 2016-10-12 | 2017-02-09 | 富士ゼロックス株式会社 | Image forming apparatus |
-
2001
- 2001-03-21 JP JP2001081548A patent/JP3748784B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005331606A (en) * | 2004-05-18 | 2005-12-02 | Kyocera Mita Corp | Transfer material transporting guide mechanism for image forming apparatus |
| JP4528556B2 (en) * | 2004-05-18 | 2010-08-18 | 京セラミタ株式会社 | Transfer material conveyance guide mechanism of image forming apparatus |
| JP2012137576A (en) * | 2010-12-27 | 2012-07-19 | Kyocera Document Solutions Inc | Image forming apparatus |
| US8682217B2 (en) | 2010-12-27 | 2014-03-25 | Kyocera Document Solutions Inc. | Image forming apparatus |
| JP2013047756A (en) * | 2011-08-29 | 2013-03-07 | Ricoh Co Ltd | Image forming apparatus |
| JP2013200357A (en) * | 2012-03-23 | 2013-10-03 | Fuji Xerox Co Ltd | Image forming apparatus and transfer unit |
| JP2017033013A (en) * | 2016-10-12 | 2017-02-09 | 富士ゼロックス株式会社 | Image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3748784B2 (en) | 2006-02-22 |
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