JPH0313587B2 - - Google Patents
Info
- Publication number
- JPH0313587B2 JPH0313587B2 JP58243688A JP24368883A JPH0313587B2 JP H0313587 B2 JPH0313587 B2 JP H0313587B2 JP 58243688 A JP58243688 A JP 58243688A JP 24368883 A JP24368883 A JP 24368883A JP H0313587 B2 JPH0313587 B2 JP H0313587B2
- Authority
- JP
- Japan
- Prior art keywords
- toner
- toner carrier
- carrier
- forming member
- layer forming
- 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 - Lifetime
Links
- 239000002245 particle Substances 0.000 claims 1
- 239000000314 lubricant Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 2
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000005662 Paraffin oil Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
- G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
- G03G15/0817—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the lateral sealing at both sides of the donor member with respect to the developer carrying direction
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Dry Development In Electrophotography (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、電子写真装置において、感光体上に
形成された静電潜像を非磁性の一成分現像剤によ
つて可視化する非磁性一成分現像装置に関するも
のである。Detailed Description of the Invention [Industrial Application Field] The present invention relates to a non-magnetic one-component developer that visualizes an electrostatic latent image formed on a photoreceptor in an electrophotographic apparatus. The present invention relates to a component developing device.
〔従来の技術〕
従来、第１図及び第２図に示すように、トナー
担持体２上に密接して配置されているホツパー部
材６とトナー層形成部材（規制部材）４とで形成
される空間にトナー１を供給し、このようにトナ
ー担持体２上に供給されたトナー１を、トナー担
持体に対して圧接されているトナー層形成部材４
により該トナー担持体２上にトナー１の薄層を形
成すると共に電荷を与え、これを静電潜像を保持
する保持体（図示せず）に送り、該静電潜像上に
トナーを付着せしめて可視像に現像する非磁性一
成分現像装置が知られている。[Prior Art] Conventionally, as shown in FIGS. 1 and 2, a hopper member 6 and a toner layer forming member (regulating member) 4 are arranged closely on a toner carrier 2. The toner 1 is supplied into the space, and the toner 1 thus supplied onto the toner carrier 2 is transferred to the toner layer forming member 4 which is in pressure contact with the toner carrier 2.
A thin layer of toner 1 is formed on the toner carrier 2, and a charge is applied thereto, and this is sent to a holder (not shown) that holds an electrostatic latent image, and the toner is attached onto the electrostatic latent image. Non-magnetic one-component developing devices are known that develop at least visible images.
このような非磁性一成分現像装置におけるトナ
ー１のシール手段としては、従来、第１図及び第
２図に示すように、ウレタン発泡体等のシール部
材５ａ，５ｂを、トナー層形成部材４の長手方向
両側部（現像領域外の部分）のトナー担持体２上
に、かつトナー担持体２とサイドフレーム３ａ，
３ｂに密接して配置し、トナー１がトナー担持体
２の両側部から漏れること、及びトナー層形成部
材４と各サイドフレーム３ａ，３ｂとの間〓から
漏れることを防止していた。 Conventionally, as a sealing means for the toner 1 in such a non-magnetic one-component developing device, sealing members 5a and 5b made of urethane foam or the like are used to seal the toner layer forming member 4, as shown in FIGS. On the toner carrier 2 on both sides in the longitudinal direction (portion outside the development area), and on the toner carrier 2 and the side frame 3a,
3b to prevent the toner 1 from leaking from both sides of the toner carrier 2 and from between the toner layer forming member 4 and each side frame 3a, 3b.
しかし、トナー担持体２の両側部、特にシール
部材５ａ，５ｂとの接触面においては、トナー担
持体２の回転によりトナーが巻き込まれるという
現象が生じ、この巻込み現象によりトナー担持体
両側部においてシール部材５ａ，５ｂとの接触面
へ巻き込まれたトナーがシール部材の押圧力によ
り固化し、トナー担持体両側部でのトナーの不均
一な流れをもたらし、トナーの漏れを完全に防止
することはできなかつた。その結果、トナー担持
体２の両側部近傍において均一なトナー層の形成
が妨げられていた。 However, on both sides of the toner carrier 2, especially at the contact surfaces with the sealing members 5a and 5b, the rotation of the toner carrier 2 causes the toner to be dragged in. The toner caught on the contact surfaces with the seal members 5a and 5b is solidified by the pressing force of the seal members, resulting in an uneven flow of toner on both sides of the toner carrier, and it is impossible to completely prevent toner leakage. I couldn't do it. As a result, formation of a uniform toner layer near both sides of the toner carrier 2 has been hindered.
従つて、本発明の目的は、上記トナーの巻込み
現象を防止し、トナー担持体の両側吹からトナー
の漏れが全くなく、均一なトナー層を形成できる
ようにした非磁性一成分現像装置を提供すること
にある。
Therefore, an object of the present invention is to provide a non-magnetic one-component developing device which prevents the above toner entrainment phenomenon and forms a uniform toner layer without any leakage of toner from both sides of the toner carrier. It is about providing.
本発明は、トナー担持体と、該トナー担持体の
上にトナーの薄層を形成し、かつトナーを帯電さ
せるトナー層形成部材とを備える非磁性一成分現
像装置において、上記トナー担持体の表面摩擦係
数が略現像領域に対応する表面において0.5〜0.7
であり、かつ略現像領域外の表面において0.1以
下であるトナー担持体に、上記トナー層形成部材
をトナーを介して圧接せしめてなることを特徴と
するものである。
The present invention provides a non-magnetic one-component developing device comprising a toner carrier and a toner layer forming member that forms a thin layer of toner on the toner carrier and charges the toner. The friction coefficient is approximately 0.5 to 0.7 on the surface corresponding to the development area.
The toner layer forming member is brought into pressure contact with a toner carrier having a surface area substantially outside the development area of 0.1 or less through the toner.
すなわち、本発明は、現像領域外のトナー担持
体両側部における表面摩擦係数を0.1以下とする
ことによつてこの部分におけるトナーの巻込み現
象を完全に防止すると共に、トナー担持体の現像
領域に対応する中央表面部の摩擦係数を、トナー
が長期間安定して搬送される摩擦係数の範囲0.5
〜0.7に規定したことを特徴とするものである。
本発明は、トナーの力学的なバランス、すなわち
トナーの層形成部材との摩擦係数とトナーのトナ
ー担持体との間の摩擦係数の間の大小関係により
決定されるという発明者の新しい知見に基づくも
のである。具体的にいえば、トナー担持体の摩擦
係数が0.1以下であるとトナーとトナー担持体と
の間の摩擦係数はトナーとトナー層形成部材との
間の摩擦係数に比べて小さくなるために、トナー
がトナー担持体の上に運ばれず、トナー層形成部
材との摩擦により完全に遮蔽されるものであり、
トナー担持体の摩擦係数が0.5以上であれば、ト
ナーがトナー層形成部材との摩擦により遮蔽され
ようとする力に比較してトナーとトナー担持体と
の間の摩擦力が大きくなり安定してトナーがトナ
ー担持体に搬送されるのである。このような新し
い知見に基づいて、発明者はこれをトナーの搬送
制御として、真にトナーの搬送が必要な現像領域
のみのトナー担持体の摩擦係数を0.5〜0.7とし、
現像として必要のない現像領域以外のトナー担持
体の領域の摩擦係数を0.1以下と設定することに
より、従来非磁性一成分現像装置で非常に大きな
問題であつた現像機サイドでのトナーの回りこみ
や固化等の問題をなくすことが出来たのである。 That is, the present invention completely prevents the toner entrainment phenomenon at both sides of the toner carrier outside the development area by setting the surface friction coefficient to 0.1 or less on both sides of the toner carrier. The friction coefficient of the corresponding central surface area is set to 0.5, which is the range of friction coefficient that allows toner to be transported stably for a long period of time.
~0.7.
The present invention is based on the inventor's new finding that the mechanical balance of toner is determined by the magnitude relationship between the coefficient of friction between the toner and the layer forming member and the coefficient of friction between the toner and the toner carrier. It is something. Specifically, if the friction coefficient of the toner carrier is 0.1 or less, the friction coefficient between the toner and the toner carrier will be smaller than the friction coefficient between the toner and the toner layer forming member. The toner is not carried onto the toner carrier and is completely shielded by friction with the toner layer forming member,
If the friction coefficient of the toner carrier is 0.5 or more, the frictional force between the toner and the toner carrier is large and stable compared to the force that the toner tries to block due to friction with the toner layer forming member. The toner is transported to the toner carrier. Based on this new knowledge, the inventors set the friction coefficient of the toner carrier only in the development area where toner transport is truly required to 0.5 to 0.7 as toner transport control.
By setting the friction coefficient of the area of the toner carrier other than the development area that is not necessary for development to 0.1 or less, toner wrap-around on the side of the developing machine, which was a very big problem with conventional non-magnetic single-component developing devices, is eliminated. This made it possible to eliminate problems such as hardening and solidification.
トナー担持体の周面の摩擦係数を低くする手段
としては、表面粗さを小さくして平滑性を増すこ
とや、二硫化モリブデン、グラフアイト、フツ化
炭素、脂肪酸金属塩等の潤滑剤をコーテイングす
る方法などが採用できる。 Means for lowering the coefficient of friction on the peripheral surface of the toner carrier include reducing surface roughness to increase smoothness, and coating with lubricants such as molybdenum disulfide, graphite, carbon fluoride, fatty acid metal salts, etc. Methods such as that can be adopted.
以下、添附図面に示す本発明の実施例を説明し
つつ、本発明について詳細に説明する。
EMBODIMENT OF THE INVENTION Hereinafter, the present invention will be described in detail while describing embodiments of the present invention shown in the accompanying drawings.
第３図に本発明の一実施例を示し、各部材の符
号は、説明の都合上第１図及び第２図に示す従来
の装置と同一の部材については同一の符号を使用
する。本実施例の基本的構成は従来の装置と同様
であるが、トナー担持体２の両側部周面は、ウレ
タンシール部材５ａ，５ｂと接触する幅で摩擦係
数が低くされている。摩擦係数は、トナー担持体
の現像領域に対応する表面では前記したように
0.5〜0.7の範囲に設定されているが、両側部のＡ
の領域は二硫化モリブデンをコーテイングするこ
とにより0.08とされている。このように構成した
ことにより、トナー担持体２が回転しても、サイ
ドフレーム３ａ，３ｂに固定されているウレタン
シール部材５ａ，５ｂとトナー担持体２の両側部
Ａとの摩擦係数はトナー担持体２の中央部のそれ
よりも低いので、トナー担持体２の回転によるそ
の両側部におけるトナーの巻き込みは完全に防止
される。 FIG. 3 shows an embodiment of the present invention, and for convenience of explanation, the same reference numerals are used for the same members as in the conventional apparatus shown in FIGS. 1 and 2. The basic structure of this embodiment is the same as that of the conventional apparatus, but the friction coefficient of the peripheral surfaces of both sides of the toner carrier 2 is made low in the width where they contact the urethane seal members 5a and 5b. The coefficient of friction is as described above on the surface of the toner carrier corresponding to the development area.
It is set in the range of 0.5 to 0.7, but A on both sides
The area is set to 0.08 by coating with molybdenum disulfide. With this configuration, even if the toner carrier 2 rotates, the coefficient of friction between the urethane seal members 5a, 5b fixed to the side frames 3a, 3b and both sides A of the toner carrier 2 will be reduced to the extent that the toner carrier 2 is rotated. Since it is lower than that at the center of the body 2, toner is completely prevented from being drawn in on both sides of the toner carrier 2 due to its rotation.
ところで、コーテイングにより摩擦係数を下げ
る手段の場合には、長期間の使用によりコーテイ
ング面が劣化するので、第４図に示すように、ウ
レタンシール部材５ａ，５ｂのトナー担持体２と
接触する面に潤滑材７を被覆あるいは含浸させて
おくことも有効な手段である。この場合の潤滑材
７としては、前述したものの他にシリコーン油、
パラフイン油などのオイルも使用できる。 By the way, in the case of means for lowering the coefficient of friction by coating, the coated surface deteriorates after long-term use, so as shown in FIG. It is also an effective means to cover or impregnate the lubricant 7. In this case, as the lubricant 7, in addition to those mentioned above, silicone oil,
Oils such as paraffin oil can also be used.
以上のように、本発明によれば、トナー担持体
の表面摩擦係数が現像領域に対応する表面におい
て0.5〜0.7に、かつ現像領域外の両側部において
0.1以下に規定されているため、トナー担持体の
両側部においてトナーの巻込み現象が生ぜず、ト
ナーの漏れが完全に防止されると共に、トナー担
持体の現像領域に対応する表面に均一なトナー層
を形成できる。
As described above, according to the present invention, the surface friction coefficient of the toner carrier is 0.5 to 0.7 on the surface corresponding to the development area, and on both sides outside the development area.
0.1 or less, no toner entrainment phenomenon occurs on both sides of the toner carrier, toner leakage is completely prevented, and uniform toner is distributed on the surface of the toner carrier corresponding to the development area. Can form layers.
第１図は従来の非磁性一成分現像装置の部分概
略正面図、第２図は第１図の−断面図、第３
図は本発明の一実施例を示す概略正面図、第４図
はシール部材の他の態様を示す斜視図である。
１……トナー、２……トナー担持体、４……ト
ナー層形成部材、５ａ，５ｂ……シール部材、７
……潤滑材。
Figure 1 is a partially schematic front view of a conventional non-magnetic one-component developing device, Figure 2 is a sectional view of Figure 1, and Figure 3 is a cross-sectional view of Figure 1.
The figure is a schematic front view showing one embodiment of the present invention, and FIG. 4 is a perspective view showing another embodiment of the sealing member. 1... Toner, 2... Toner carrier, 4... Toner layer forming member, 5a, 5b... Seal member, 7
...Lubricant.
Claims (1)
ーの薄層を形成し、かつトナーを帯電させるトナ
ー層形成部材とを備える非磁性一成分現像装置に
おいて、上記トナー担持体の表面摩擦係数が略現
像領域に対応する表面において0.5〜0.7であり、
かつ略現像領域外の表面において0.1以下である
トナー担持体に、上記トナー層形成部材をトナー
を介して圧接せしめてなる非磁性一成分現像装
置。1. In a non-magnetic one-component developing device comprising a toner carrier and a toner layer forming member that forms a thin layer of toner on the toner carrier and charges the toner, the surface friction coefficient of the toner carrier is 0.5 to 0.7 on the surface approximately corresponding to the development area,
A non-magnetic one-component developing device in which the toner layer forming member is brought into pressure contact via toner with a toner carrier whose surface substantially outside the development area has a particle diameter of 0.1 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24368883A JPS60135966A (en) | 1983-12-26 | 1983-12-26 | Nonmagnetic one-component developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24368883A JPS60135966A (en) | 1983-12-26 | 1983-12-26 | Nonmagnetic one-component developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60135966A JPS60135966A (en) | 1985-07-19 |
| JPH0313587B2 true JPH0313587B2 (en) | 1991-02-22 |
Family
ID=17107503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24368883A Granted JPS60135966A (en) | 1983-12-26 | 1983-12-26 | Nonmagnetic one-component developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60135966A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6339247U (en) * | 1986-09-01 | 1988-03-14 | ||
| JP5410491B2 (en) * | 2011-10-06 | 2014-02-05 | 住友ゴム工業株式会社 | Developing roller |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53103742U (en) * | 1977-01-26 | 1978-08-21 |
-
1983
- 1983-12-26 JP JP24368883A patent/JPS60135966A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60135966A (en) | 1985-07-19 |
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