JPH0447729Y2 - - Google Patents
Info
- Publication number
- JPH0447729Y2 JPH0447729Y2 JP1986132731U JP13273186U JPH0447729Y2 JP H0447729 Y2 JPH0447729 Y2 JP H0447729Y2 JP 1986132731 U JP1986132731 U JP 1986132731U JP 13273186 U JP13273186 U JP 13273186U JP H0447729 Y2 JPH0447729 Y2 JP H0447729Y2
- Authority
- JP
- Japan
- Prior art keywords
- developer
- developer carrier
- hopper
- elastic body
- 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.)
- Expired
Links
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Dry Development In Electrophotography (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は複写機等に用いる一成分現像装置に関
し、特に規制部材により現像剤担持体上に現像剤
層を形成するようにした一成分現像装置に関す
る。[Detailed Description of the Invention] Industrial Application Field The present invention relates to a one-component developing device used in copying machines, etc., and particularly relates to a one-component developing device in which a developer layer is formed on a developer carrier by a regulating member. .
従来の技術
ゼログラフイーの原理を利用した一般的な複写
機においては、一様に帯電した感光体表面を露光
して静電潜像を形成し、この静電潜像を現像して
得られるトナー像を用紙等の転写材に転写した後
に定着してコピーを得ている。実用的な現像装置
としては、従来から、トナーとキヤリアとから成
る二成分現像剤を使用して該キヤリアとの摩擦帯
電により帯電したトナーを静電潜像に静電吸着さ
せる二成分現像装置が広く用いられているが、近
年、現像装置自体の小型化及び保守性の向上等の
観点から、トナーだけから成る一成分現像剤を使
用した一成分現像装置も実用に供されるようにな
つてきた。Conventional technology In general copying machines that utilize the principle of xerography, a uniformly charged photoreceptor surface is exposed to light to form an electrostatic latent image, and this electrostatic latent image is developed. A toner image is transferred to a transfer material such as paper and then fixed to obtain a copy. As a practical developing device, there has conventionally been a two-component developing device that uses a two-component developer consisting of toner and a carrier and electrostatically attracts the charged toner to an electrostatic latent image by frictional charging with the carrier. Although it is widely used, in recent years, from the viewpoint of downsizing the developing device itself and improving maintainability, one-component developing devices that use a one-component developer made only of toner have come into practical use. Ta.
第２図はこの種の一成分現像装置の一例を示し
たものである。ホツパー６内に収容された現像剤
３は、現像剤供給部材５の回転により現像剤担持
体２上に担持され、規制部材１により所定厚さの
現像剤層とされると共に摩擦帯電され、現像剤担
持体２に対向して配設される図示しない静電潜像
保持体（感光体）上に形成された静電潜像に静電
的に吸着してこれを可視像化する。 FIG. 2 shows an example of this type of one-component developing device. The developer 3 accommodated in the hopper 6 is supported on the developer carrier 2 by the rotation of the developer supply member 5, is formed into a developer layer of a predetermined thickness by the regulating member 1, and is triboelectrically charged to develop the developer. The agent is electrostatically attracted to an electrostatic latent image formed on an electrostatic latent image holder (photoconductor), not shown, which is disposed opposite to the agent carrier 2, and is made into a visible image.
４はホツパー６内部からの現像剤３の漏れを防
止するためのシール部材であり、このシール部材
４は通常、ホツパー６の底壁６１に固定される板
部材４１とこの板部材４１に貼着される軟弾性体
４２とから構成される。板部材４１としてはプラ
スチツク及びSUS材等の弾性体が用いられ、軟
弾性体４２としてはポリイミド等の絶縁体からな
るフイルムが用いられる。 4 is a sealing member for preventing leakage of the developer 3 from inside the hopper 6; this sealing member 4 is usually attached to a plate member 41 fixed to the bottom wall 61 of the hopper 6; It is composed of a soft elastic body 42. As the plate member 41, an elastic body such as plastic or SUS material is used, and as the soft elastic body 42, a film made of an insulator such as polyimide is used.
考案が解決しようとする問題点
しかし、上述したような構成であると、シール
部材４と現像剤担持体２の接触が線接触であるた
めに、以下のような問題が生ずる。Problems to be Solved by the Invention However, with the above-described configuration, the following problems occur because the contact between the sealing member 4 and the developer carrier 2 is a line contact.
(1) 周囲の温度及び湿度等の変化に起因する板部
材４１あるいは軟弾性体４２の微小な撓みを吸
収することができずに、現像剤３が外部にこぼ
れることがある。(1) The developer 3 may spill outside because the plate member 41 or the soft elastic body 42 cannot absorb minute deflections caused by changes in ambient temperature, humidity, etc.
(2) 現像剤供給部材５の回転に伴いホツパー６内
の現像剤３がシール部材４とホツパー底壁６１
間に押し込まれ、この際の現像剤圧力の増大に
より現像剤３がシール部材４と現像剤担持体２
間から漏れることがある。(2) As the developer supplying member 5 rotates, the developer 3 in the hopper 6 hits the sealing member 4 and the hopper bottom wall 61.
The developer 3 is pushed between the sealing member 4 and the developer carrier 2 due to the increase in developer pressure at this time.
It may leak from between.
本考案はこのような問題に鑑みて創作されたも
ので、ホツパー内部に収容される現像剤が簡単に
外部に漏れることのない一成分現像装置を提供す
ることを目的としている。 The present invention was created in view of these problems, and it is an object of the present invention to provide a one-component developing device in which the developer contained in the hopper does not easily leak to the outside.
問題点を解決するための手段
上述した従来技術の問題は、現像剤担持体の表
面に当接して当該表面に現像剤層を形成する規制
部材と前記現像剤担持体を内蔵したホツパーの底
壁とにより形成されるホツパー開口部を介して、
一成分現像剤が前記現像担持体から静電潜像保持
体に移行して当該静電潜像を可視像に現像する一
成分現像装置において、前記ホツパーの底壁に固
定される弾性体を前記現像剤担持体に面接触する
ように配設し、この弾性体と現像剤担持体間に絶
縁性フイルムを介在させることにより解決され
る。Means for Solving the Problems The above-mentioned problems with the prior art are related to the regulation member that comes into contact with the surface of the developer carrier to form a developer layer on the surface, and the bottom wall of the hopper containing the developer carrier. through the hopper opening formed by the
In a one-component developing device in which a one-component developer transfers from the developer carrier to an electrostatic latent image holder and develops the electrostatic latent image into a visible image, an elastic body fixed to the bottom wall of the hopper is used. This problem can be solved by disposing the elastic body in surface contact with the developer carrier and interposing an insulating film between the elastic body and the developer carrier.
作 用
本考案によれば、ホツパーの底壁に固定される
弾性体を前記現像剤担持体に面接触するように配
設し、この弾性体と現像剤担持体間に絶縁性フイ
ルムを介在させている、つまり該絶縁性フイルム
が現像剤担持体に面接触するように装置を構成し
ているので、各部材の撓みあるいはホツパー内の
現像剤圧力に起因した現像剤の外部への漏れが防
止される。According to the present invention, an elastic body fixed to the bottom wall of the hopper is disposed in surface contact with the developer carrier, and an insulating film is interposed between the elastic body and the developer carrier. In other words, since the device is configured so that the insulating film is in surface contact with the developer carrier, leakage of developer to the outside due to deflection of each member or developer pressure in the hopper is prevented. be done.
実施例
以下、本考案の望ましい実施例を図面に基いて
説明する。Embodiments Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
第１図は本考案を適用した一成分現像装置の典
型例を示したものであり、従来例を示した第２図
と実質的に同一の部材には同一の番号を付してあ
る。現像剤３を収容したホツパー６の内部には、
現像剤担持体２と現像剤供給部材５が互いに圧接
しながら回転可能に軸支されており、図中矢印で
示した方向に回転するようにしてある。１は一端
が現像剤担持体２に当接するように他端をホツパ
ー６に固定した規制部材である。現像剤３は、現
像剤供給部材５と現像剤担持体２の当接部におい
て現像剤担持体２へ供給され、規制部材１によつ
て所定厚さの薄膜現像剤層とされた後に、ホツパ
ー底壁６１と規制部材１とにより形成されるホツ
パーの開口部に対向して配設される図示しない静
電潜像保持体上の静電潜像に静電吸着する。 FIG. 1 shows a typical example of a one-component developing device to which the present invention is applied, and substantially the same members as in FIG. 2, which shows a conventional example, are given the same numbers. Inside the hopper 6 containing the developer 3,
The developer carrier 2 and the developer supply member 5 are rotatably supported while being in pressure contact with each other, and are configured to rotate in the direction indicated by the arrow in the figure. Reference numeral 1 denotes a regulating member whose other end is fixed to the hopper 6 so that one end comes into contact with the developer carrier 2 . The developer 3 is supplied to the developer carrier 2 at the contact portion between the developer supply member 5 and the developer carrier 2, and after being made into a thin developer layer of a predetermined thickness by the regulating member 1, the developer 3 is transferred to the hopper. The electrostatic latent image is electrostatically attracted to an electrostatic latent image on an electrostatic latent image holder (not shown) disposed opposite to the opening of the hopper formed by the bottom wall 61 and the regulating member 1.
７は本考案に特徴的なシール部材であり、弾性
体７１と絶縁性フイルム７２とからなる。弾性体
７１は、例えば通常の発泡ウレタンをホツパー底
壁６１と現像剤担持体２間で挟持するかたちで該
底壁６１に固定してなり、絶縁性フイルム７２
は、現像剤担持体２の形状に応じて変形した弾性
体７１に沿つてこの弾性体７１と現像剤担持体２
間に挟持される。絶縁性フイルム７２は例えば長
方形の平面形状をなしている。この絶縁性フイル
ム７２は全面接着により弾性体７１に直接貼着し
てもよいし、ホツパー６の外部に面した部分で部
分的に弾性体７１又はホツパー底壁６１の端部に
固定してもよい。シール部材７と現像剤担持体２
の当接圧は、これが高すぎると現像剤担持体２上
の現像剤が現像剤担持体２とシール部材７との当
接部の上流側でこぼれ落ちてしまうことがあり、
低すぎると予定されるシール効果が達成されない
ので、所定の圧力範囲内に設定されることが望ま
しい。当該圧力の設定は、弾性体７１の厚さを調
整することにより達成される。弾性体７１は例え
ば略直方体の発泡ウレタンからなり、この弾性体
７１はホツパー底壁６１の内側に貼着される。弾
性体７１の現像剤担持体２に対向する面に現像剤
担持体２の円筒形状に合わせて切込みを形成して
おくことによつて、シール部材７と現像剤担持体
２の当接圧をあまり高くすことなしに現像剤に対
するシール効果を高めることができる。弾性体７
１及び絶縁性フイルム７２は、現像剤担持体２の
長手方向（回転軸の方向）について均一な当接圧
が得られるように、現像剤担持体２の回転軸に対
してほぼ平行に配置される。 Reference numeral 7 denotes a sealing member characteristic of the present invention, which is composed of an elastic body 71 and an insulating film 72. The elastic body 71 is made of, for example, ordinary foamed urethane fixed to the bottom wall 61 of the hopper by sandwiching it between the bottom wall 61 of the hopper and the developer carrier 2, and an insulating film 72.
The elastic body 71 and the developer carrier 2 are moved along the elastic body 71 which is deformed according to the shape of the developer carrier 2.
sandwiched between. The insulating film 72 has, for example, a rectangular planar shape. This insulating film 72 may be directly attached to the elastic body 71 by adhesive on the entire surface, or may be partially fixed to the elastic body 71 or the end of the hopper bottom wall 61 in the part facing the outside of the hopper 6. good. Seal member 7 and developer carrier 2
If the contact pressure is too high, the developer on the developer carrier 2 may spill out on the upstream side of the contact area between the developer carrier 2 and the sealing member 7.
If the pressure is too low, the expected sealing effect will not be achieved, so it is desirable to set the pressure within a predetermined range. Setting of the pressure is achieved by adjusting the thickness of the elastic body 71. The elastic body 71 is made of, for example, a substantially rectangular parallelepiped foamed urethane, and is adhered to the inside of the hopper bottom wall 61. By forming a cut in the surface of the elastic body 71 facing the developer carrier 2 in accordance with the cylindrical shape of the developer carrier 2, the contact pressure between the sealing member 7 and the developer carrier 2 can be reduced. The sealing effect against the developer can be enhanced without increasing the price too much. Elastic body 7
1 and the insulating film 72 are arranged substantially parallel to the rotation axis of the developer carrier 2 so that a uniform contact pressure can be obtained in the longitudinal direction (rotation axis direction) of the developer carrier 2. Ru.
このように、シール部材７と現像剤担持体２の
当接が面接触となるように各部材を構成したの
で、各部材の撓みあるいはホツパー６内の現像剤
圧力の増大に起因してシール部材７と現像剤担持
体２の当接部から現像剤が漏れることが防止され
る。 In this way, each member is configured so that the sealing member 7 and the developer carrier 2 come into surface contact, so that the sealing member 7 may be damaged due to deflection of each member or an increase in developer pressure in the hopper 6. The developer is prevented from leaking from the contact portion between the developer support member 7 and the developer carrier 2.
考案の効果
以上説明したように、本考案によれば、ホツパ
ー内部に収容される現像剤が簡単に外部に漏れる
ことのない一成分現像装置を提供することができ
るという効果を奏する。Effects of the Invention As explained above, according to the present invention, it is possible to provide a one-component developing device in which the developer contained in the hopper does not easily leak to the outside.
第１図は、本考案の望ましい実施例を示す一成
分現像装置の断面構成図、第２図は、従来の一成
分現像装置の一例を示す断面構成図である。
１……規制部材、２……現像剤担持体、３……
現像剤、４，７……シール部材、５……現像剤供
給部材、６……ホツパー、７１……弾性体、７２
……絶縁性フイルム。
FIG. 1 is a cross-sectional configuration diagram of a one-component developing device showing a preferred embodiment of the present invention, and FIG. 2 is a cross-sectional configuration diagram showing an example of a conventional one-component developing device. 1... Regulating member, 2... Developer carrier, 3...
Developer, 4, 7... Seal member, 5... Developer supply member, 6... Hopper, 71... Elastic body, 72
...Insulating film.
Claims (1)
剤層を形成する規制部材と前記現像剤担持体を内
蔵したホツパーの底壁とにより形成されるホツパ
ー開口部を介して、一成分現像剤が前記現像剤担
持体から静電潜像保持体に移行して当該静電潜像
の可視像に現像する一成分現像装置において、 前記ホツパーの底壁に固定される弾性体を前記
現像剤担持体に面接触するように配設し、 この弾性体と現像剤担持体間に絶縁性フイルム
を介在させたことを特徴とする一成分現像装置。[Claims for Utility Model Registration] A hopper opening formed by a regulating member that comes into contact with the surface of a developer carrier to form a developer layer on the surface, and a bottom wall of the hopper containing the developer carrier. In a one-component developing device in which a one-component developer is transferred from the developer carrier to an electrostatic latent image holder and developed into a visible image of the electrostatic latent image, the one-component developer is fixed to the bottom wall of the hopper. A one-component developing device, characterized in that an elastic body is disposed in surface contact with the developer carrier, and an insulating film is interposed between the elastic body and the developer carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986132731U JPH0447729Y2 (en) | 1986-09-01 | 1986-09-01 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986132731U JPH0447729Y2 (en) | 1986-09-01 | 1986-09-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6339245U JPS6339245U (en) | 1988-03-14 |
| JPH0447729Y2 true JPH0447729Y2 (en) | 1992-11-11 |
Family
ID=31032392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986132731U Expired JPH0447729Y2 (en) | 1986-09-01 | 1986-09-01 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0447729Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0631483Y2 (en) * | 1987-08-11 | 1994-08-22 | 富士ゼロックス株式会社 | One-component developing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55115060A (en) * | 1979-02-28 | 1980-09-04 | Copyer Co Ltd | Electrophotographic dry type developing device |
| JPS5918968A (en) * | 1982-07-23 | 1984-01-31 | Canon Inc | Preventing device for scattering of developer |
| JPS59129880A (en) * | 1983-01-14 | 1984-07-26 | Canon Inc | Developing device |
-
1986
- 1986-09-01 JP JP1986132731U patent/JPH0447729Y2/ja not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55115060A (en) * | 1979-02-28 | 1980-09-04 | Copyer Co Ltd | Electrophotographic dry type developing device |
| JPS5918968A (en) * | 1982-07-23 | 1984-01-31 | Canon Inc | Preventing device for scattering of developer |
| JPS59129880A (en) * | 1983-01-14 | 1984-07-26 | Canon Inc | Developing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6339245U (en) | 1988-03-14 |
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