JPH08166717A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPH08166717A JPH08166717A JP6332453A JP33245394A JPH08166717A JP H08166717 A JPH08166717 A JP H08166717A JP 6332453 A JP6332453 A JP 6332453A JP 33245394 A JP33245394 A JP 33245394A JP H08166717 A JPH08166717 A JP H08166717A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- container
- developing
- developer carrier
- toner
- 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
- Dry Development In Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電子写真方式の複写
機、プリンター等の画像形成装置の現像装置に関するも
のであり、特に現像剤のシール方法の性能向上に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device for an image forming apparatus such as an electrophotographic copying machine and a printer, and more particularly to improving the performance of a developer sealing method.
【０００２】[0002]
【従来の技術】従来の現像剤シールの代表的な構成を図
５に示す。図５において現像容器１０１には、その開口
部両端に横方向へのトナー漏れを防止するフェルト等で
形成された端部シール１０２と、開口部下端に、現像剤
担持体である現像ローラ１０４の回転方向下流側からの
トナー吹き出しを防止するシート部材１０３が貼り付け
られている。そして、現像ローラ１０４が軸受（図示せ
ず）を介して現像容器１０１にセットされると、端部シ
ール１０２は現像容器１０１と現像ローラ１０４に挟持
され、またシート部材１０３は現像ローラ１０４に当接
し、現像容器１０１内のトナー漏れを防止している。2. Description of the Related Art A typical structure of a conventional developer seal is shown in FIG. In FIG. 5, the developing container 101 has an end seal 102 formed of felt or the like at both ends of the opening for preventing toner from leaking in the lateral direction, and a developing roller 104, which is a developer carrier, at the lower end of the opening. A sheet member 103 is attached to prevent the toner from being blown from the downstream side in the rotation direction. When the developing roller 104 is set in the developing container 101 via a bearing (not shown), the end seal 102 is sandwiched between the developing container 101 and the developing roller 104, and the sheet member 103 contacts the developing roller 104. In contact with each other, toner leakage in the developing container 101 is prevented.
【０００３】一方、トナー層厚規制部材である現像ブレ
ード１０６は、現像ローラ１０４がセットされると、そ
の周面に当接するように現像容器１０１に固定されてい
る。この時現像ブレード１０６の両端部は図６のように
端部シール１０２のエッジ部に当接することにより、ま
たはその上に重ねられ、現像ローラ１０４と端部シール
１０２で挟み込むことにより、トナー漏れを防止してい
る。On the other hand, the developing blade 106, which is a toner layer thickness regulating member, is fixed to the developing container 101 so as to contact the peripheral surface of the developing roller 104 when the developing roller 104 is set. At this time, both ends of the developing blade 106 come into contact with the edge portion of the end seal 102 as shown in FIG. 6 or are overlapped on the edge portion, and are sandwiched between the developing roller 104 and the end seal 102 to prevent toner leakage. To prevent.
【０００４】ここでシート部材１０３は、その弾性によ
り、現像容器１０１内からのトナーの吹き出しと、未現
像のトナーを現像容器１０１内にすくい込むように回収
する機能を有している。Due to its elasticity, the sheet member 103 has a function of ejecting toner from the inside of the developing container 101 and a function of collecting undeveloped toner by scooping it into the developing container 101.
【０００５】[0005]
【発明が解決しようとしている課題】しかしながら上記
構成において、図７のように現像容器１０１の成型加工
上、あるいは他部品との溶着等のアッセンブルにより、
前記シート部材１０３の貼付け面に反りが発生すると、
貼付け面から現像ローラ１０４までの距離が特に中央部
で狭くなり、見かけ上シート部材１０３のコシが強くな
り、未現像トナーを回収できないといった不具合が生じ
ることがあった。However, in the above-described structure, as shown in FIG. 7, due to the molding process of the developing container 101 or the assembly such as welding with other parts,
When the attachment surface of the sheet member 103 is warped,
The distance from the sticking surface to the developing roller 104 becomes narrow, especially in the central portion, and the apparent rigidity of the sheet member 103 becomes so strong that the undeveloped toner cannot be collected in some cases.
【０００６】本発明は、上記問題点を解決し、シート部
材の貼付け面に反りが発生した場合でも、未現像トナー
を確実に回収することのできるシート部材を備えた現像
装置を提供することを目的としている。The present invention solves the above-mentioned problems and provides a developing device equipped with a sheet member that can reliably collect undeveloped toner even when the sticking surface of the sheet member is warped. Has an aim.
【０００７】[0007]
【課題を解決するための手段】本発明によれば、現像剤
担持体と、少なくとも一端に開口を有する現像容器と、
前記現像容器に前記現像剤担持体及び現像剤供給部材を
回転可能に支持する軸受部材と、前記現像剤担持体周面
に当接し、現像剤担持体上の現像剤層厚を規制する部材
と、前記現像容器と前記現像剤担持体の両端部周面とで
挟持され、現像剤の漏れを防止する端部シール部材と、
前記現像剤担持体の回転方向下流側の前記現像容器開口
部長手全域に貼付けられ、その自由端が前記現像剤担持
体に当接し、現像剤の漏れを防止する、弾性を有するシ
ート部材とを具備する現像装置において、前記シート部
材が貼付けられる面の長手方向において、前記現像剤担
持体に近い側の貼付け面端部と、前記現像剤担持体との
距離が、中央部において最大となるように形成した事に
より達成される。According to the present invention, a developer carrying member, a developing container having an opening at least at one end,
A bearing member that rotatably supports the developer carrier and the developer supply member in the developer container, and a member that contacts the peripheral surface of the developer carrier and regulates the thickness of the developer layer on the developer carrier. An end seal member that is sandwiched between the developer container and the peripheral surfaces of both ends of the developer carrier to prevent developer leakage.
An elastic sheet member that is attached to the entire longitudinal direction of the opening of the developing container on the downstream side in the rotation direction of the developer carrier, and has its free end abutting the developer carrier to prevent developer leakage. In the developing device provided, in the longitudinal direction of the surface to which the sheet member is attached, the distance between the end portion of the attachment surface on the side closer to the developer carrier and the developer carrier is maximized in the central portion. It is achieved by forming into.
【０００８】[0008]
【作用】シート部材が貼付けられる面は、現像容器内側
のエッジ部が、予め中央部において現像剤担持体に対
し、距離が最大となるように形成されているので、現像
容器とトナー容器とを超音波溶着等により固定した際に
中央部が現像剤担持体に近付くように反りが発生した場
合においても、シート部材の弾性が保たれ、未現像のト
ナーを確実に回収し、トナー漏れの発生を防止する。In the surface to which the sheet member is attached, the edge portion inside the developing container is formed in advance so that the distance from the developer carrier is maximized in the central portion. Even if the central part warps so that it approaches the developer carrier when it is fixed by ultrasonic welding, the elasticity of the sheet member is maintained, undeveloped toner is reliably collected, and toner leakage occurs. Prevent.
【０００９】[0009]
【実施例】以下に、本発明の実施例を図面に沿って説明
する。図１〜図４は本発明の特長を最もよく表すところ
の図面である。Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 are drawings which best show the features of the present invention.
【００１０】図１において、現像装置１００は、現像容
器１と、トナー容器２と、現像容器１に回転可能に支持
された現像剤担持体たる現像ローラ３と、図２にも示す
ように前記現像ローラ３に当接し、トナーの薄層塗布及
を行うブレード４と、前記現像ローラ３にトナーを供給
する現像剤供給部材たる供給ローラ５と、現像容器開口
部の両端部に貼り付けられ、前記現像ローラ３の周面に
圧接されている端部シール６と、前記現像ローラ３の回
転方向下流側と前記開口部との間に、前記開口部の長手
方向にわたって貼付けられ、その自由端が前記現像ロー
ラ３と当接し、さらにその両端が前記端部シール６と前
記現像ローラ３とで挟持されているシート部材としての
吹き出し防止シート７と、前記現像容器に貼付けられ、
ブレード４の裏面に軽当接し、現像容器上部及び端部へ
のトナー進入を軽減するバックアップシール８と、現像
ローラ３及び搬送ローラ４の軸受部材９とで構成されて
いる。In FIG. 1, a developing device 100 includes a developing container 1, a toner container 2, a developing roller 3 as a developer carrying member rotatably supported by the developing container 1, and the developing roller 3 as shown in FIG. A blade 4 that is in contact with the developing roller 3 and applies a thin layer of toner, a supply roller 5 that is a developer supply member that supplies toner to the developing roller 3, and is attached to both ends of the developing container opening. The end seal 6 that is pressed against the peripheral surface of the developing roller 3 is attached between the downstream side of the developing roller 3 in the rotational direction and the opening in the longitudinal direction of the opening, the free end of which is attached. A blow-out prevention sheet 7 as a sheet member which is in contact with the developing roller 3 and whose both ends are sandwiched between the end seal 6 and the developing roller 3, and is attached to the developing container.
It is composed of a backup seal 8 that abuts the back surface of the blade 4 lightly to reduce toner entry to the upper and end portions of the developing container, and a bearing member 9 for the developing roller 3 and the transport roller 4.
【００１１】ここで端部シール６は、図３（ａ）のよう
に当初はブレード４部及びバックアップシール８のエッ
ジ部に対し、隙間ゼロないし多少隙間を持った位置に貼
られている。そして現像ローラ４を所定の位置にセット
し、両端から軸受部材９を挿通すると、図３（ｂ）のよ
うに、軸受部材９に形成された端部シール側圧付与部材
９ａにより、端部シール６のエッジ部が押され、ブレー
ド４及びバックアップシール８のエッジ部に当接し、密
着する。Here, as shown in FIG. 3A, the end seal 6 is initially attached to the blade 4 and the edge portion of the backup seal 8 at a position where there is zero clearance or a slight clearance. Then, when the developing roller 4 is set at a predetermined position and the bearing members 9 are inserted from both ends, as shown in FIG. 3B, the end seal side pressure applying member 9a formed on the bearing member 9 causes the end seal 6 The edge portion of is pressed and comes into contact with and comes into close contact with the edge portions of the blade 4 and the backup seal 8.
【００１２】ここで吹き出し防止シート７を貼付ける面
１ａ1 は、図４（ａ）に示すように、容器内側のエッジ
部が、予め中央部において前記現像ローラ３に対し、距
離が最大となるように、Ｒ形状もしくはＶ字形状に欠き
取りが形成されている。ここで前記欠き取り量を起こり
得る最大の反り量と同等にしておけば、例えば図４
（ｂ）のように、現像容器１とトナー容器２とを超音波
溶着等により固定したために、中央部が前記現像ローラ
３に近付くように反りが発生した場合においても、吹き
出し防止シート７の弾性が保たれるため、未現像のトナ
ーが回収できない事によるトナー漏れの発生が防止でき
る。Here, as shown in FIG. 4 (a), the edge portion inside the container of the surface 1a 1 to which the blow-out prevention sheet 7 is attached has a maximum distance from the developing roller 3 in the central portion in advance. As described above, the cutout is formed in the R shape or the V shape. If the cutout amount is set equal to the maximum warp amount that can occur, for example, as shown in FIG.
As shown in (b), since the developing container 1 and the toner container 2 are fixed by ultrasonic welding or the like, even if a warp occurs so that the central portion approaches the developing roller 3, the elasticity of the blowout preventing sheet 7 is reduced. Therefore, it is possible to prevent the occurrence of toner leakage due to the fact that undeveloped toner cannot be collected.
【００１３】[0013]
【発明の効果】以上説明したように、本発明によれば、
現像剤担持体と、少なくとも一端に開口を有する現像容
器と、前記現像容器に前記現像剤担持体及び現像剤供給
部材を回転可能に支持する軸受部材と、前記現像剤担持
体周面に当接し、現像剤担持体上の現像剤層厚を規制す
る部材と、前記現像容器と前記現像剤担持体の両端部周
面とで挟持され、現像剤の漏れを防止する端部シール部
材と、前記現像剤担持体の回転方向下流側の前記現像容
器開口部長手全域に貼付けられ、その自由端が前記現像
剤担持体に当接し、現像剤の漏れを防止する、弾性を有
するシート部材とを具備する現像装置において、前記シ
ート部材が貼付けられる面の長手方向において、前記現
像剤担持体に近い側の貼付け面端部と、前記現像剤担持
体との距離が、中央部において最大となるように形成し
た事により、現像容器の成型加工上、あるいは他部品と
の溶着等のアッセンブルにより、現像容器に反りが仮に
発生しても、未現像トナーを回収するために必要にして
十分な自由長（＝弾性）が確保できるため、トナー漏れ
を防止する事が可能となった。As described above, according to the present invention,
A developer carrier, a developer container having an opening at least at one end, a bearing member that rotatably supports the developer carrier and a developer supply member in the developer container, and a bearing member that contacts the peripheral surface of the developer carrier. A member that regulates the thickness of the developer layer on the developer carrier, and an end seal member that is sandwiched between the developing container and the peripheral surfaces of both ends of the developer carrier to prevent leakage of the developer; An elastic sheet member that is attached to the entire length of the opening of the developing container on the downstream side in the rotation direction of the developer carrier, and has its free end abutting against the developer carrier and preventing the developer from leaking. In the developing device, in the longitudinal direction of the surface on which the sheet member is stuck, the distance between the sticking surface end on the side closer to the developer carrying member and the developer carrying member is maximized in the central part. Developed by forming Even if the developing container is warped due to the molding process of the container or the assembly such as welding with other parts, it is possible to secure a sufficient free length (= elasticity) necessary for collecting the undeveloped toner. Therefore, it is possible to prevent toner leakage.
【図１】本発明の一実施例における現像装置の部分斜視
図である。FIG. 1 is a partial perspective view of a developing device according to an embodiment of the present invention.
【図２】図１装置の断面図である。2 is a cross-sectional view of the device of FIG.
【図３】図１装置における端部シール部材の取り付け方
法を説明するための図である。FIG. 3 is a diagram for explaining a method of attaching an end seal member in the apparatus shown in FIG.
【図４】図１装置におけるシート部材の貼付け面の形状
を示す図である。FIG. 4 is a diagram showing a shape of a sticking surface of a sheet member in the apparatus shown in FIG.
【図５】従来例の現像装置を示す断面図である。FIG. 5 is a cross-sectional view showing a conventional developing device.
【図６】図５装置における端部シール部材とシート部材
を示す図である。6 is a diagram showing an end seal member and a sheet member in the apparatus shown in FIG.
【図７】図５装置におけるシート部材の不具合点を表す
図である。FIG. 7 is a diagram showing a defect of a sheet member in the apparatus shown in FIG.
１ 現像容器 １ａ1 吹き出し防止シート貼付け面 ３ 現像ローラ（現像剤担持体） ５ 供給ローラ（現像剤供給部材） ６ 端部シール ７ 吹き出し防止シート（シート部材）DESCRIPTION OF SYMBOLS 1 Development container 1a 1 Blow-out prevention sheet attachment surface 3 Development roller (developer carrier) 5 Supply roller (developer supply member) 6 End seal 7 Blow-out prevention sheet (sheet member)
Claims (1)
を有する現像容器と、前記現像容器に前記現像剤担持体
及び現像剤供給部材を回転可能に支持する軸受部材と、
前記現像剤担持体周面に当接し、現像剤担持体上の現像
剤層厚を規制する部材と、前記現像容器と前記現像剤担
持体の両端部周面とで挟持され、現像剤の漏れを防止す
る端部シール部材と、前記現像剤担持体の回転方向下流
側の前記現像容器開口部長手全域に貼付けられ、その自
由端が前記現像剤担持体に当接し、現像剤の漏れを防止
する、弾性を有するシート部材とを具備する現像装置に
おいて、前記シート部材が貼付けられる面の長手方向に
おいて、前記現像剤担持体に近い側の貼付け面端部と、
前記現像剤担持体との距離が、中央部において最大とな
るように形成した事を特徴とする現像装置。1. A developer carrier, a developer container having an opening at least at one end, and a bearing member rotatably supporting the developer carrier and the developer supply member in the developer container.
Leakage of the developer, which is abutted on the peripheral surface of the developer carrier and is sandwiched between a member for regulating the thickness of the developer layer on the developer carrier, and the peripheral surfaces of both ends of the developer container and the developer carrier. And an end seal member for preventing the leakage of the developer, which is affixed to the entire length of the opening of the developing container opening on the downstream side in the rotation direction of the developer carrier, the free end of which is in contact with the developer carrier. In the developing device including a sheet member having elasticity, in the longitudinal direction of the surface to which the sheet member is attached, an attachment surface end portion on the side closer to the developer carrier,
A developing device, wherein the developing device is formed such that the distance from the developer carrying member is maximum in the central portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33245394A JP3065902B2 (en) | 1994-12-14 | 1994-12-14 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33245394A JP3065902B2 (en) | 1994-12-14 | 1994-12-14 | Developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08166717A true JPH08166717A (en) | 1996-06-25 |
| JP3065902B2 JP3065902B2 (en) | 2000-07-17 |
Family
ID=18255154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33245394A Expired - Fee Related JP3065902B2 (en) | 1994-12-14 | 1994-12-14 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3065902B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009157408A (en) * | 2009-04-16 | 2009-07-16 | Oki Data Corp | Image forming unit and image forming apparatus |
| JP2014142578A (en) * | 2012-12-28 | 2014-08-07 | Ricoh Co Ltd | Image forming apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04362974A (en) * | 1991-02-22 | 1992-12-15 | Tokyo Electric Co Ltd | Developing device for electrophotographic device |
| JPH04368970A (en) * | 1991-06-18 | 1992-12-21 | Canon Inc | Developing device |
| JPH06195006A (en) * | 1991-07-25 | 1994-07-15 | Canon Inc | Sticking method for receiving sheet, scooping sheet, cleaning device, process cartridge, and image forming device |
-
1994
- 1994-12-14 JP JP33245394A patent/JP3065902B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04362974A (en) * | 1991-02-22 | 1992-12-15 | Tokyo Electric Co Ltd | Developing device for electrophotographic device |
| JPH04368970A (en) * | 1991-06-18 | 1992-12-21 | Canon Inc | Developing device |
| JPH06195006A (en) * | 1991-07-25 | 1994-07-15 | Canon Inc | Sticking method for receiving sheet, scooping sheet, cleaning device, process cartridge, and image forming device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009157408A (en) * | 2009-04-16 | 2009-07-16 | Oki Data Corp | Image forming unit and image forming apparatus |
| JP2014142578A (en) * | 2012-12-28 | 2014-08-07 | Ricoh Co Ltd | Image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3065902B2 (en) | 2000-07-17 |
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