JP3010692B2 - Developing device - Google Patents

Developing device

Info

Publication number
JP3010692B2
JP3010692B2 JP2169606A JP16960690A JP3010692B2 JP 3010692 B2 JP3010692 B2 JP 3010692B2 JP 2169606 A JP2169606 A JP 2169606A JP 16960690 A JP16960690 A JP 16960690A JP 3010692 B2 JP3010692 B2 JP 3010692B2
Authority
JP
Japan
Prior art keywords
toner
conveying member
developing device
supplied
particle diameter
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
Application number
JP2169606A
Other languages
Japanese (ja)
Other versions
JPH0457080A (en
Inventor
晋一 竹本
博史 長谷川
直樹 豊吉
建樹 岡
浩 後藤
成隆 吉田
Original Assignee
ミノルタ株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ミノルタ株式会社 filed Critical ミノルタ株式会社
Priority to JP2169606A priority Critical patent/JP3010692B2/en
Priority to DE4120826A priority patent/DE4120826A1/en
Publication of JPH0457080A publication Critical patent/JPH0457080A/en
Priority to US07/935,344 priority patent/US5243390A/en
Application granted granted Critical
Publication of JP3010692B2 publication Critical patent/JP3010692B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/06Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822Arrangements for preparing, mixing, supplying or dispensing developer
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/06Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0865Arrangements for supplying new developer
    • G03G15/0875Arrangements for supplying new developer cartridges having a box like shape
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/06Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0822Arrangements for preparing, mixing, supplying or dispensing developer
    • G03G15/0877Arrangements for metering and dispensing developer from a developer cartridge into the development unit
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/06Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0896Arrangements or disposition of the complete developer unit or parts thereof not provided for by groups G03G15/08 - G03G15/0894

Description

【発明の詳細な説明】 [産業上の利用分野] この発明は、複写機やプリンター等の画像形成装置に
使用される現像装置に係り、特に、トナー収容部に収容
されたトナーを、このトナー収容部内に設けられた送り
手段によってトナー搬送部材に供給し、このトナー搬送
部材によってトナーを像担持体に搬送させるようにした
現像装置に関するものである。
Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developing device used for an image forming apparatus such as a copying machine or a printer. The present invention relates to a developing device in which toner is supplied to a toner conveying member by a feeding unit provided in a storage section, and toner is conveyed to an image carrier by the toner conveying member.

[従来技術及びその問題点] 複写機やプリンター等の画像形成装置に使用される現
像装置として、従来より、トナー収容部に収容されたト
ナーを、このトナー収容部内に設けられた送り手段によ
ってトナー搬送部材に供給し、このトナー搬送部材によ
ってトナーを像担持体に搬送させるようにしたものが使
用されていた。
[Related Art and Problems Thereof] As a developing device used in an image forming apparatus such as a copying machine or a printer, a toner stored in a toner storage unit has been conventionally formed by a feeding unit provided in the toner storage unit. What has been used has been used in which the toner is supplied to a conveying member and the toner is conveyed to the image carrier by the toner conveying member.

そして、このような現像装置においては、トナー搬送
部材によって搬送されるトナーを帯電させるため、一般
に上記のようにトナーが供給されたトナー搬送部材の表
面に規制部材を圧接させ、この規制部材によってトナー
搬送部材の表面に供給されたトナーを摩擦帯電させると
共に、このトナー搬送部材の表面におけるトナーの量を
規制するようにしていた。
In such a developing device, in order to charge the toner carried by the toner carrying member, a regulating member is generally pressed against the surface of the toner carrying member to which the toner is supplied as described above, and the regulating member presses the toner. The toner supplied to the surface of the conveying member is frictionally charged, and the amount of toner on the surface of the toner conveying member is regulated.

また、このような現像装置においては、トナー収容部
に収容させるトナーとして、適当な平均粒径を有するト
ナーを使用するのであるが、トナー全体の粒径は一定で
はなく、様々な粒径のトナーが存在しており、平均粒径
より小径のものから大径のものまで一定の分布をもって
存在していた。
Further, in such a developing device, a toner having an appropriate average particle diameter is used as the toner to be stored in the toner storage section. And existed with a certain distribution from those having a smaller diameter to those having a larger diameter than the average particle diameter.

そして、このようなトナーを上記のように送り手段に
よってトナー搬送部材に供給し、このように供給された
トナーを規制部材によって圧接させて摩擦帯電させると
共に、トナー搬送部材の表面におけるトナーの量を規制
するようにした場合、粒径の小さなトナーから先に現像
に使用されて消費され、トナー収納部内における粒径の
大きなトナーの割合が多くなり、次第に消費されるトナ
ーの粒径が大きくなるという粒径選別現象が発生し、ま
た規制部材による圧接によってトナーが粉砕されて微粉
化したり、後処理剤がトナーに埋め込まれたりして、ト
ナーが劣化するという現象が生じた。
Then, such a toner is supplied to the toner conveying member by the feeding means as described above, and the toner thus supplied is pressed by the regulating member to frictionally charge the toner, and the amount of the toner on the surface of the toner conveying member is reduced. In the case of restricting, toner having a small particle diameter is used for development first and consumed, and the ratio of the toner having a large particle diameter in the toner storage unit increases, and the particle diameter of the consumed toner gradually increases. Particle size selection occurred, and the toner was crushed and finely divided by the pressure contact of the regulating member, and the toner deteriorated due to the post-processing agent being embedded in the toner.

このため、上記のような現像装置を使用して画像形成
を行った場合、トナー収容部に収容されたトナーの内、
粒径の小さなトナーが消費されている初期の段階におい
ては、形成される画像にかぶりが生じたり、トナーこぼ
れが生じたりするということがなく、良好な画像形成が
行えた。
For this reason, when an image is formed using the developing device as described above, of the toner stored in the toner storage unit,
In the early stage when the toner having a small particle diameter was consumed, a good image could be formed without causing fogging or toner spilling on the formed image.

しかし、このようにして現像装置を使用していると、
トナー収容部に収容された粒径の小さなトナーが次第に
消費されて、粒径の大きなトナーだけが残るようになる
と共に、上記のようなトナーの劣化も進んで、劣化した
トナーの量も多くなった。
However, when using the developing device in this way,
The toner having a small particle size stored in the toner storage portion is gradually consumed, and only the toner having a large particle size remains, and the deterioration of the toner proceeds as described above, and the amount of the deteriorated toner also increases. Was.

そして、このように粒径の大きなトナーや劣化された
トナーがトナー搬送部材に供給されて、現像に使用され
るようになると、トナーに帯電不良等が生じ、形成され
る画像にかぶりが発生したり、トナーこぼれやトナー飛
散が増大して、画像形成装置内が汚れる等の問題が生じ
た。
When the toner having such a large particle size or the deteriorated toner is supplied to the toner conveying member and used for development, poor charging or the like occurs in the toner, and fogging occurs in a formed image. In addition, toner spills and toner scattering increase, and the image forming apparatus becomes dirty.

[発明が解決しようとする課題] この発明は、トナー収容部に収容されたトナーを、こ
のトナー収納部内に設けられた送り手段によってトナー
搬送部材に供給し、このトナー搬送部材によってトナー
を像担持体に搬送させるようにした現像装置における上
記のような問題を解決することを課題とするものであ
る。
[Problems to be Solved by the Invention] According to the present invention, toner stored in a toner storage section is supplied to a toner transport member by a feeding means provided in the toner storage section, and the toner transport member carries the image. It is an object of the present invention to solve the above-described problem in a developing device that is transported to a body.

すなわち、この発明は、上記のような現像装置におい
て、粒径の大きなトナーや劣化されたトナーが使用され
て、形成される画像にかぶりが発生するということがな
く、またトナーこぼれやトナー飛散が増大して、画像形
成装置が汚れたりするということもないようにすること
を課題とするものである。
That is, the present invention does not cause fogging of a formed image by using a toner having a large particle diameter or a deteriorated toner in the developing device as described above, and also prevents toner spillage and toner scattering. It is an object of the present invention to prevent the image forming apparatus from becoming dirty due to increase.

[課題を解決するための手段] この発明においては、上記のような課題を解決するた
め、トナー収容部内に収容されたトナーを、このトナー
収容部内に回転可能に設けられた送り手段によってトナ
ー搬送部材に供給し、このトナー搬送部材によってトナ
ーを像担持体に搬送させるようにした現像装置におい
て、トナー搬送部材に供給されたトナーの摩擦帯電を行
うと共にトナー搬送部材上のトナーの量を規制する規制
部材をトナー搬送部材に圧接して設け、上記送り手段に
よってトナー収容部からトナー搬送部材に供給されるト
ナーの一部をトナー収容部の下部に残留させる残留手段
を前記送り手段と接触する位置に設けると共に、この残
留手段によってトナー収容部の下部に残留されたトナー
をトナー収容部内において攪拌させる攪拌手段を設ける
ようにしたのである。
[Means for Solving the Problems] In the present invention, in order to solve the above-described problems, the toner stored in the toner storage unit is transported by a feeding unit rotatably provided in the toner storage unit. In a developing device in which the toner is supplied to a member and the toner is transported to the image carrier by the toner transport member, the toner supplied to the toner transport member is frictionally charged and the amount of toner on the toner transport member is regulated. A regulating member provided in pressure contact with the toner conveying member, and a position in which a part of the toner supplied from the toner container to the toner conveying member by the above-mentioned feeding part remains in a lower portion of the toner storing part, and a position in contact with the feeding part. And a stirring means for stirring the toner remaining in the lower portion of the toner storage section by the remaining means in the toner storage section. Is provided.

[作用] この発明の現像装置においては、上記のようにトナー
収容部内に収容されたトナーを、このトナー収容部内に
設けられた送り手段によってトナー搬送部材に供給する
にあたり、送り手段によってトナー搬送部材に供給され
るトナーの一部を、上記残留手段によってトナー収容部
の下部に残留させると共に、このようにトナー収容部の
下部に残留されたトナーを、このトナー収容部内におい
て上記攪拌手段により攪拌させるようにしている。
[Operation] In the developing device of the present invention, when the toner accommodated in the toner accommodating section is supplied to the toner conveying member by the feeding means provided in the toner accommodating section, the toner conveying member is fed by the feeding means. A part of the toner supplied to the toner storage section is left in the lower portion of the toner storage section by the above-described residual section, and the toner thus left in the lower section of the toner storage section is stirred in the toner storage section by the stirring section. Like that.

このようにしてトナー収容部内に収容されたトナーを
トナー搬送部材に供給し、このトナー搬送部材によって
トナーを像担持体に搬送させて現像を行うようにする
と、当初においては、上記残留手段によってトナー収容
部内に残留されるトナー中に、粒径の大きなものから小
さなものまで含まれるが、このように残留したトナーが
上記攪拌手段によってトナー収容部内において攪拌され
消費されていくに連れて、粒径の小さいトナーから先に
消費されるので、上記残留手段によってトナー収容部の
下部に残留されるトナーは大径の比率の高くなったトナ
ーとなる。
When the toner accommodated in the toner accommodating section is supplied to the toner conveying member and the toner is conveyed to the image carrier by the toner conveying member to perform development, initially, the toner remains by the residual means. The toner remaining in the container includes particles having a large particle size to a small particle. However, as the toner remaining in this way is stirred and consumed in the toner container by the stirring means, the particle size is reduced. Since the toner having a smaller diameter is consumed first, the toner remaining in the lower portion of the toner storage portion by the above-described residual means is a toner having a large ratio of a large diameter.

そして、このようにトナー収容部の下部に残留された
粒径の大きなトナーは、トナー搬送部材に供給されず
に、上記残留手段によってトナー収容部の下部に最後ま
で残り、画像形成に使用されるということがなくなる。
Then, the toner having a large particle diameter remaining in the lower portion of the toner storage unit is not supplied to the toner conveying member, but remains in the lower portion of the toner storage unit by the above-described residual unit, and is used for image formation. It will not be.

また、この現像装置の使用に伴ってトナーが劣化した
場合にも、この劣化したトナーが上記残留手段によって
トナー収容部の下部に残留するようになり、劣化したト
ナーが全て画像形成に使用されるということもなくな
る。
Further, even when the toner is deteriorated due to the use of the developing device, the deteriorated toner remains in the lower portion of the toner storage section by the above-described residual means, and all the deteriorated toner is used for image formation. That is no longer true.

[実施例] 以下、この発明の実施例を添付図面に基づいて具体的
に説明する。
Embodiment An embodiment of the present invention will be specifically described below with reference to the accompanying drawings.

(実施例1) この実施例の現像装置においては、第1図に示すよう
に、トナー収容部(11)内にトナー(1)を収容させる
と共に、このトナー収容部(11)内に回転部材(12)を
設け、この回転部材(12)をトナー収容部(11)内にお
いて回転させるようにした。
(Embodiment 1) In the developing device of this embodiment, as shown in FIG. 1, a toner (1) is accommodated in a toner accommodating section (11), and a rotating member is accommodated in the toner accommodating section (11). (12) is provided, and the rotating member (12) is rotated in the toner container (11).

そして、この実施例のものにおいては、第1図及び第
2図に示すように、上記回転部材(12)の一端部に、送
り手段(13)として、弾性体で構成された搬送羽根(13
a)を設け、この搬送羽根(13a)を回転部材(12)の回
転に伴ってトナー収容部(11)内で回転させ、トナー収
容部(11)内に収容されたトナー(1)を、この搬送羽
根(13a)によりトナー供給口(14)を通してトナー搬
送部材(15)側に位置するトナー供給部(16)内に送り
込むようにした。
In this embodiment, as shown in FIGS. 1 and 2, one end of the rotating member (12) is provided with a transporting blade (13) made of an elastic material as a feeding means (13).
a) is provided, and the transport blade (13a) is rotated in the toner storage section (11) with the rotation of the rotating member (12), and the toner (1) stored in the toner storage section (11) is removed. The transport blade (13a) feeds the toner into the toner supply section (16) located on the toner transport member (15) side through the toner supply port (14).

また、この実施例の現像装置においては、上記搬送羽
根(13a)によってトナー収容部(11)内からトナー供
給部(16)に送り込まれるトナー(1)の一部をトナー
収容部(11)の下部に残留させる残留手段(17)とし
て、上記搬送羽根(13a)の回転方向に沿ってトナー収
容部(11)の底部から上記トナー供給口(14)に伸びた
リブ(17a)を、トナー収容部(11)の長手方向に一定
の間隔で所要数立設させ、このように立設させたリブ
(17a)間にトナー(1)を残留させるようにした。
Further, in the developing device of this embodiment, a part of the toner (1) sent from the inside of the toner storage section (11) to the toner supply section (16) by the transport blade (13a) is transferred to the toner storage section (11). A rib (17a) extending from the bottom of the toner container (11) to the toner supply port (14) along the rotation direction of the transport blade (13a) is provided as a residual means (17) for remaining in the lower portion. A required number of standing portions are provided at regular intervals in the longitudinal direction of the portion (11), and the toner (1) is left between the ribs (17a) thus standing.

さらに、このようにリブ(17a)間に残留するトナー
(1)をトナー収容部(11)内において攪拌させる攪拌
手段(18)として、上記回転部材(12)における搬送羽
根(13a)と反対側の端部に、上記のリブ(17a)とリブ
(17a)との間を通過するようにして所要数の攪拌羽根
(18a)を設け、上記回転部材(12)の回転によって、
これらの攪拌羽根(18a)が、第3図に示すように、上
記のリブ(17a)とリブ(17a)との間を通過して、リブ
(17a)間に残留したトナー(1)をトナー収容部(1
1)内において攪拌させるようにした。
Further, as the agitating means (18) for agitating the toner (1) remaining between the ribs (17a) in the toner accommodating portion (11), the rotating member (12) on the side opposite to the transport blade (13a). A required number of agitating blades (18a) are provided at the end portions of the ribs so as to pass between the ribs (17a) and the ribs (17a). By the rotation of the rotating member (12),
As shown in FIG. 3, these stirring blades (18a) pass between the ribs (17a) and the ribs (17a) and remove the toner (1) remaining between the ribs (17a). Container (1
It was made to stir in 1).

そして、上記のようにトナー収容部(11)内に収容さ
れたトナー(1)を、搬送羽根(13a)によってトナー
供給部(16)内に送り込んだ後は、このように送り込ま
れたトナー(1)を、トナー供給部(16)内に設けられ
た供給ローラ(19)によって駆動ローラ(20)の外周を
覆うようにして設けられたスリーブ状のトナー搬送部材
(15)に供給するようにした。
Then, after the toner (1) stored in the toner storage unit (11) as described above is sent into the toner supply unit (16) by the transport blade (13a), the toner (1) thus sent is 1) is supplied to a sleeve-like toner conveying member (15) provided so as to cover the outer periphery of the drive roller (20) by a supply roller (19) provided in the toner supply section (16). did.

そして、上記駆動ローラ(20)を回転させて、この駆
動ローラ(20)の外周に設けられた上記トナー搬送部材
(15)を回転させ、上記のように供給されたトナー
(1)を、このトナー搬送部材(15)によって像担持体
(2)である感光体ドラム(2)側に搬送させるように
した。
Then, the driving roller (20) is rotated to rotate the toner conveying member (15) provided on the outer periphery of the driving roller (20), and the toner (1) supplied as described above is removed. The toner is transported toward the photosensitive drum (2), which is the image carrier (2), by the toner transport member (15).

そして、このようにトナー搬送部材(15)によってト
ナー(1)を感光体ドラム(2)側に搬送させる途中に
おいて、このトナー搬送部材(15)の表面に規制部材
(21)を圧接させ、この規制部材(21)によってトナー
搬送部材(15)の表面に供給されたトナー(1)を摩擦
帯電させると共に、トナー搬送部材(15)の表面におけ
るトナー(1)の量を規制するようにした。
While the toner (1) is being conveyed toward the photosensitive drum (2) by the toner conveying member (15), the regulating member (21) is pressed against the surface of the toner conveying member (15). The toner (1) supplied to the surface of the toner conveying member (15) is frictionally charged by the regulating member (21), and the amount of the toner (1) on the surface of the toner conveying member (15) is regulated.

ここで、この実施例の現像装置においては、上記規制
部材(21)をトナー搬送部材(15)の表面に圧接させた
位置と、上記供給ローラ(19)との間に、トナー供給口
(14)側に伸びたガイド板(22)を設けるようにした。
Here, in the developing device of this embodiment, the toner supply port (14) is provided between the position where the regulating member (21) is pressed against the surface of the toner conveying member (15) and the supply roller (19). The guide plate (22) extending on the side of ()) is provided.

そして、上記規制部材(21)による規制によってトナ
ー搬送部材(15)の表面から除去された粒径の大きなト
ナー(1)や、規制部材(21)による規制によって劣化
したトナー(1)を、このガイド板(22)によってトナ
ー供給口(14)に導き、このトナー供給口(14)からト
ナー収容部(11)内に戻すようにした。
The toner (1) having a large particle diameter removed from the surface of the toner conveying member (15) by the regulation by the regulation member (21) and the toner (1) degraded by the regulation by the regulation member (21) are removed. The guide plate (22) guides the toner supply port (14), and returns the toner supply port (14) into the toner storage section (11).

一方、上記のようにトナー搬送部材(15)の表面にお
いてトナー(1)を摩擦帯電させると共に、トナー搬送
部材(15)の表面におけるトナー(1)の量を規制した
後は、このように帯電されたトナー(1)をこのトナー
搬送部材(15)によって感光体ドラム(2)と対面する
部分に導き、駆動ローラ(20)から感光体ドラム(2)
側に突出したトナー搬送部材(15)を、感光体ドラム
(2)の表面に柔らかく接触させて、このトナー搬送部
材(15)から帯電されたトナー(1)を、感光体ドラム
(2)に形成された潜像箇所に供給し、感光体ドラム
(2)表面にトナー画像を形成して画像形成を行うよう
にした。
On the other hand, the toner (1) is frictionally charged on the surface of the toner conveying member (15) as described above, and the amount of the toner (1) on the surface of the toner conveying member (15) is regulated. The toner (1) is guided by the toner conveying member (15) to a portion facing the photosensitive drum (2), and is driven from the drive roller (20) to the photosensitive drum (2).
The toner conveying member (15) protruding to the side is gently brought into contact with the surface of the photosensitive drum (2), and the toner (1) charged from the toner conveying member (15) is transferred to the photosensitive drum (2). The toner is supplied to the formed latent image portion, and a toner image is formed on the surface of the photosensitive drum (2) to form an image.

このようにして画像形成を繰り返して行うと、この現
像装置においては、前記の粒径選別現象が生じて、粒径
の小さいトナー(1)から先に消費される一方、粒径の
大きなトナー(1)は上記のようにガイド板(22)によ
ってトナー供給口(14)からトナー収容部(11)内に戻
され、このような操作が何度も繰り返して行われると、
トナー収容部(11)内における粒径の大きなトナー
(1)の比率が次第に増加し、また前記のように規制部
材(21)による規制によって劣化したトナー(1)もト
ナー収容部(11)内に戻されるため、トナー収容部(1
1)内における劣化したトナー(1)の比率も高くなっ
た。
When image formation is repeatedly performed in this manner, in this developing device, the above-described particle diameter selection phenomenon occurs, and the toner (1) having a small particle diameter is consumed first, while the toner (1) having a large particle diameter is consumed. 1) is returned from the toner supply port (14) into the toner storage section (11) by the guide plate (22) as described above, and when such an operation is repeatedly performed,
The ratio of the toner (1) having a large particle diameter in the toner container (11) gradually increases, and the toner (1) deteriorated by the regulation by the regulating member (21) as described above also remains in the toner container (11). The toner container (1
The ratio of the deteriorated toner (1) in (1) also increased.

そして、上記のようにしてトナー収容部(11)内に収
容されたトナー(1)が順々に消費されて、トナー収容
部(11)内におけるトナー(1)の量が少なくなると共
に、トナー収容部(11)内における粒径の大きなトナー
(1)や劣化したトナー(1)の比率が増加すると、上
記リブ(17a)によって搬送羽根(13a)によるトナー
(1)の送り込みが抑止され、粒径の大きなトナー
(1)や劣化したトナー(1)がトナー収容部(11)下
部に設けたリブ(17a)間に残留した状態で、トナー
(1)がトナー搬送部材(15)に供給されなくなった。
Then, the toner (1) stored in the toner storage unit (11) as described above is sequentially consumed, so that the amount of the toner (1) in the toner storage unit (11) decreases, and When the ratio of the toner (1) having a large particle diameter or the deteriorated toner (1) in the storage section (11) increases, the feeding of the toner (1) by the transport blade (13a) is suppressed by the rib (17a), The toner (1) is supplied to the toner conveying member (15) in a state where the toner (1) having a large particle diameter or the deteriorated toner (1) remains between the ribs (17a) provided at the lower portion of the toner storing section (11). No longer.

このため、この現像装置においては、粒径の大きなト
ナー(1)や劣化されたトナー(1)が全てトナー搬送
部材(15)に供給されて、画像形成に使用されるという
ことがなく、形成される画像にかぶりが発生したり、ト
ナーこぼれやトナー飛散が多くなるということがなかっ
た。
Therefore, in this developing device, the toner (1) having a large particle diameter and the deteriorated toner (1) are all supplied to the toner conveying member (15) and are not used for image formation. No fogging occurred in the image to be produced, and toner spilling and toner scattering did not increase.

(実施例2) この実施例の現像装置も、上記実施例1の現像装置と
ほぼ同様であるが、この実施例の現像装置においては、
前記搬送羽根(13a)によってトナー収容部(11)から
トナー供給部(16)に送り込まれるトナー(1)の一部
をトナー収容部(11)の下部に残留させる残留手段(1
7)として、第4図及び第5図に示すように、トナー
(1)をトナー供給部(16)に送り込むトナー供給口
(14)の下縁に沿って庇部材(17b)をトナー収容部(1
1)側に突設させるようにした。
(Embodiment 2) The developing device of this embodiment is almost the same as the developing device of Embodiment 1, but in the developing device of this embodiment,
Residual means (1) for leaving a part of the toner (1) sent from the toner storage section (11) to the toner supply section (16) by the transport blade (13a) below the toner storage section (11).
7) As shown in FIGS. 4 and 5, the eave member (17b) is moved along the lower edge of the toner supply port (14) for feeding the toner (1) to the toner supply section (16). (1
1) It was made to protrude to the side.

また、この実施例の現像装置においては、上記の庇部
材(17b)によって残留するトナー(1)をトナー収容
部(11)内において攪拌させる攪拌手段(18)として、
前記の回転部材(12)における搬送羽根(13a)と反対
側の端部に、所要数の攪拌用のばね部材(18b)を所要
間隔を介して設け、これらのばね部材(18b)を、上記
回転部材(12)の回転に伴って回転させて、残留するト
ナー(1)をトナー収容部(11)内において攪拌させる
ようにした。
Further, in the developing device of this embodiment, a stirring means (18) for stirring the toner (1) remaining by the eaves member (17b) in the toner storage section (11) is provided.
A required number of agitating spring members (18b) are provided at an end of the rotating member (12) opposite to the conveying blade (13a) at a required interval, and these spring members (18b) The remaining toner (1) is agitated in the toner container (11) by being rotated with the rotation of the rotating member (12).

そして、この実施例の現像装置においても、上記のよ
うに突設された庇部材(17b)によって、上記搬送羽根
(13a)によるトナー(1)の送り込みが抑止され、粒
径の大きなトナー(1)や劣化したトナー(1)がトナ
ー収容部(11)の下部に残留した状態で、トナー搬送部
材(15)にトナー(1)が供給されなくなった。
Also in the developing device of this embodiment, the feeding of the toner (1) by the transport blade (13a) is suppressed by the eaves member (17b) protruding as described above, and the toner (1) having a large particle diameter is formed. The toner (1) is no longer supplied to the toner conveying member (15) in a state in which the toner (1) and the deteriorated toner (1) remain in the lower portion of the toner container (11).

この結果、この実施例の現像装置においても、粒径の
大きなトナー(1)や劣化されたトナー(1)が全てト
ナー搬送部材(15)に供給されて、画像形成に使用され
るということがなく、形成される画像にかぶりが発生し
たり、トナーこぼれやトナー飛散が多くなるということ
がなかった。
As a result, also in the developing device of this embodiment, the toner (1) having a large particle diameter and the deteriorated toner (1) are all supplied to the toner conveying member (15) and used for image formation. No fogging occurred in the formed image, and toner spills and toner scattering did not increase.

(実施例3) この実施例の現像装置も、上記の各実施例の現像装置
とほぼ同様であるが、この実施例の現像装置において
は、前記搬送羽根(13a)によってトナー収容部(11)
からトナー供給部(16)に送り込まれるトナー(1)の
一部をトナー収容部(11)の下部に残留させる残留手段
(17)として、第6図及び第7図に示すように、トナー
収容部(11)内の底部に、所要数のピン(17c)をトナ
ー収容部(11)の長手方向沿って一定の間隔で突設させ
るようにした。
(Embodiment 3) The developing device of this embodiment is also substantially the same as the developing device of each of the above embodiments. However, in the developing device of this embodiment, the toner container (11) is provided by the transport blade (13a).
As a residual means (17) for leaving a part of the toner (1) sent from the toner supply unit (16) to the lower part of the toner storage unit (11), as shown in FIGS. A required number of pins (17c) project from the bottom of the section (11) at regular intervals along the longitudinal direction of the toner storage section (11).

また、これらのピン(17c)によって残留するトナー
(1)をトナー収容部(11)内において攪拌させる攪拌
手段(18)としては、上記実施例2のものと同様に、回
転部材(12)における搬送羽根(13a)と反対側の端部
に、攪拌用のばね部材(18b)を所要間隔を介して所要
数設け、これらのばね部材(18b)を上記回転部材(1
2)の回転に伴って回転させて、残留するトナー(1)
をトナー収容部(11)内において攪拌させるようにし
た。
As the stirring means (18) for stirring the toner (1) remaining by these pins (17c) in the toner storage portion (11), the same as in the second embodiment, the rotation member (12) is used. A required number of agitating spring members (18b) are provided at an end opposite to the conveying blade (13a) at a required interval, and these spring members (18b) are attached to the rotating member (1).
The remaining toner (1) rotated by the rotation of 2)
Was stirred in the toner container (11).

そして、この実施例の現像装置においても、上記のよ
うに突設された各ピン(17c)によって、上記搬送羽根
(13a)によるトナー(1)の送り込みが抑止され、粒
径の大きなトナー(1)や劣化したトナー(1)がトナ
ー収容部(11)の下部に残留した状態で、トナー搬送部
材(15)にトナー(1)が供給されなくなった。
Also in the developing device of this embodiment, the feeding of the toner (1) by the transport blade (13a) is suppressed by the pins (17c) protruding as described above, and the toner (1) having a large particle diameter is prevented. The toner (1) is no longer supplied to the toner conveying member (15) in a state in which the toner (1) and the deteriorated toner (1) remain in the lower portion of the toner container (11).

この結果、この実施例の現像装置においても、粒径の
大きなトナー(1)や劣化されたトナー(1)が全てト
ナー搬送部材(15)に供給されて、画像形成に使用され
るということがなく、形成される画像にかぶりが発生し
たり、トナーこぼれやトナー飛散が多くなるということ
がなかった。
As a result, also in the developing device of this embodiment, the toner (1) having a large particle diameter and the deteriorated toner (1) are all supplied to the toner conveying member (15) and used for image formation. No fogging occurred in the formed image, and toner spills and toner scattering did not increase.

[発明の効果] 以上詳述したように、この発明に係る現像装置におい
ては、トナー収容部内に収容されたトナーを、このトナ
ー収容部内に回転可能に設けられた送り手段によってト
ナー搬送部材に供給し、このように供給されたトナーを
トナー搬送部材に圧接させた規制部材によって摩擦帯電
させると共に、トナー搬送部材の表面におけるトナーの
量を規制した後、このトナーを像担持体に搬送させて現
像を行うにあたり、トナーの一部をトナー収容部の下部
に残留させる残留手段を送り手段と接触する位置に設け
ると共に、この残留手段によってトナー収容部の下部に
残留されたトナーを攪拌手段によってトナー収容部内に
おいて攪拌させるようにしたため、粒径の小さいトナー
から先に消費された場合、粒径の大きなトナーが残留手
段によってトナー収容部の下部に残留するようになっ
た。
[Effect of the Invention] As described above in detail, in the developing device according to the present invention, the toner contained in the toner containing section is supplied to the toner conveying member by the feeding means rotatably provided in the toner containing section. Then, the supplied toner is frictionally charged by a regulating member pressed against the toner conveying member, and the amount of toner on the surface of the toner conveying member is regulated. Then, the toner is conveyed to the image carrier and developed. In performing the above, a residual means for allowing a part of the toner to remain in the lower portion of the toner storing section is provided at a position in contact with the feeding means, and the toner remaining in the lower part of the toner storing section by the remaining means is stored in the toner storing section by the stirring means. Since the toner is agitated in the unit, when the toner having a small particle diameter is consumed first, the toner having a large particle diameter is Therefore, the toner remains in the lower portion of the toner storage unit.

そして、このように残留手段によりトナー収容部の下
部に残留されるようになった粒径の大きなトナーは、ト
ナー搬送部材には供給されずにトナー収容部の下部に最
後まで残り、画像形成に使用されるということがなくな
り、またこの現像装置の使用によって劣化したトナー
も、上記残留手段によってトナー収容部の下部に残留す
るようになり、劣化したトナーが全て画像形成に使用さ
れるということもなくなった。
Then, the toner having a large particle diameter, which has been left in the lower portion of the toner storage unit by the remaining means, is not supplied to the toner conveying member but remains to the end of the lower portion of the toner storage unit, and is used for image formation. The toner is not used, and the toner degraded by the use of the developing device also remains in the lower portion of the toner storage unit by the above-mentioned residual means, so that all the degraded toner is used for image formation. lost.

この結果、この発明に係る現像装置においては、粒径
の大きなトナーや劣化されたトナーが使用されて、形成
される画像にかぶりが発生するということことがなく、
良好な画像形成が行えるようになり、またトナーこぼれ
やトナー飛散が増大して、画像形成装置が汚れたりする
ということもなくなった。
As a result, in the developing device according to the present invention, fogging does not occur in an image to be formed by using toner having a large particle size or deteriorated toner,
Good image formation can be performed, and toner spills and toner scattering are increased, so that the image forming apparatus does not become dirty.

【図面の簡単な説明】[Brief description of the drawings]

第1図はこの発明の実施例1に係る現像装置の使用状態
を示す概略断面図、第2図は同実施例の現像装置におけ
るトナー収容部部分の分解斜視図、第3図は同実施例の
現像装置においてトナー収容部内に残留されたトナーを
攪拌させる攪拌手段の状態を示す部分拡大図、第4図は
この発明の実施例2に係る現像装置の使用状態を示す概
略断面図、第5図は上記実施例2に係る現像装置におい
てトナー収容部内に残留されたトナーを攪拌させる攪拌
手段の状態を示す部分拡大図、第6図はこの発明の実施
例3に係る現像装置の使用状態を示す概略断面図、第7
図は上記実施例3に係る現像装置におけるトナー収容部
内の状態を示す部分拡大図である。 (1)……トナー,(2)……像担持体(感光体ドラ
ム),(11)……トナー収容部 (13)……送り手段,
(15)……トナー搬送部材,(17)……残留手段,(1
8)……攪拌手段,(21)……規制部材
FIG. 1 is a schematic sectional view showing a use state of a developing device according to Embodiment 1 of the present invention, FIG. 2 is an exploded perspective view of a toner accommodating portion in the developing device of the embodiment, and FIG. FIG. 4 is a partially enlarged view showing a state of a stirring means for stirring the toner remaining in the toner container in the developing device of FIG. 4, FIG. 4 is a schematic sectional view showing a use state of the developing device according to Embodiment 2 of the present invention, and FIG. FIG. 6 is a partially enlarged view showing a state of stirring means for stirring the toner remaining in the toner container in the developing device according to the second embodiment, and FIG. 6 shows a state of use of the developing device according to the third embodiment of the present invention. Schematic cross-sectional view, seventh
FIG. 10 is a partially enlarged view showing a state inside the toner storage unit in the developing device according to the third embodiment. (1) toner, (2) image carrier (photosensitive drum), (11) toner container (13) feeding means,
(15) ... toner transport member, (17) ... residual means, (1
8) Stirring means (21) Control member

───────────────────────────────────────────────────── フロントページの続き (72)発明者 豊吉 直樹 大阪府大阪市中央区安土町2丁目3番13 号 大阪国際ビル ミノルタカメラ株式 会社内 (72)発明者 岡 建樹 大阪府大阪市中央区安土町2丁目3番13 号 大阪国際ビル ミノルタカメラ株式 会社内 (72)発明者 後藤 浩 大阪府大阪市中央区安土町2丁目3番13 号 大阪国際ビル ミノルタカメラ株式 会社内 (72)発明者 吉田 成隆 大阪府大阪市中央区安土町2丁目3番13 号 大阪国際ビル ミノルタカメラ株式 会社内 (56)参考文献 特開 平2−27382(JP,A) 実開 昭63−180866(JP,U) 実開 昭63−39250(JP,U) (58)調査した分野(Int.Cl.7,DB名) G03G 15/08 - 15/09 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Naoki Toyoyoshi 2-3-13 Azuchicho, Chuo-ku, Osaka-shi, Osaka Inside the Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Takeki Oka, Azuchi, Chuo-ku, Osaka 2-3-13 Machi-cho, Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Hiroshi Goto 2-3-3, Azuchicho, Chuo-ku, Osaka-shi, Osaka Osaka International Building Minolta Camera Co., Ltd. (72) Inventor Yoshida Naritaka 2-3-13 Azuchicho, Chuo-ku, Osaka City, Osaka Prefecture Osaka International Building Minolta Camera Co., Ltd. (56) References JP-A-2-27382 (JP, A) Jikai 63-180866 (JP, U ) Jpn. 63-39250 (JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) G03G 15/08-15/09

Claims (1)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】トナー収容部内に収容されたトナーを、こ
のトナー収容部内に回転可能に設けられた送り手段によ
ってトナー搬送部材に供給し、このトナー搬送部材によ
ってトナーを像担持体に搬送させるようにした現像装置
において、トナー搬送部材に供給されたトナーの摩擦帯
電を行うと共にトナー搬送部材上のトナーの量を規制す
る規制部材をトナー搬送部材に圧接して設け、上記送り
手段によってトナー収容部からトナー搬送部材に供給さ
れるトナーの一部をトナー収容部の下部に残留させる残
留手段を前記送り手段と接触する位置に設けると共に、
この残留手段によってトナー収容部の下部に残留された
トナーをトナー収容部内において攪拌させる攪拌手段を
設けたことを特徴とする現像装置。
The toner contained in the toner container is supplied to a toner conveying member by feeding means rotatably provided in the toner container, and the toner is conveyed to the image carrier by the toner conveying member. In the developing device, a regulating member that frictionally charges the toner supplied to the toner conveying member and regulates the amount of toner on the toner conveying member is provided in pressure contact with the toner conveying member. A residual means for allowing a part of the toner supplied to the toner conveying member to remain in the lower portion of the toner storage portion is provided at a position in contact with the feeding means,
A developing device provided with an agitating means for agitating the toner remaining in the lower portion of the toner accommodating section by the residual means in the toner accommodating section.
JP2169606A 1990-06-27 1990-06-27 Developing device Expired - Lifetime JP3010692B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2169606A JP3010692B2 (en) 1990-06-27 1990-06-27 Developing device
DE4120826A DE4120826A1 (en) 1990-06-27 1991-06-24 DEVELOPMENT DEVICE
US07/935,344 US5243390A (en) 1990-06-27 1992-08-28 Device for conveying developer in a developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2169606A JP3010692B2 (en) 1990-06-27 1990-06-27 Developing device

Publications (2)

Publication Number Publication Date
JPH0457080A JPH0457080A (en) 1992-02-24
JP3010692B2 true JP3010692B2 (en) 2000-02-21

Family

ID=15889616

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2169606A Expired - Lifetime JP3010692B2 (en) 1990-06-27 1990-06-27 Developing device

Country Status (2)

Country Link
JP (1) JP3010692B2 (en)
DE (1) DE4120826A1 (en)

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JP3790946B2 (en) 1997-12-08 2006-06-28 株式会社ヴァレオサーマルシステムズ Heat exchanger
CN108469720B (en) * 2018-01-30 2020-07-14 中山市汇佳复印设备科技有限公司 Developer supply assembly and developer supply container

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3009471C2 (en) * 1979-03-15 1982-04-29 Tokyo Shibaura Denki K.K., Kawasaki, Kanagawa Developer transport device for electrostatic copiers
JPS5931979A (en) * 1982-08-16 1984-02-21 Toshiba Corp Developing device
US4572631A (en) * 1983-03-22 1986-02-25 Ricoh Company, Ltd. Double sleeve developing device
JPS6022153A (en) * 1983-07-18 1985-02-04 Mita Ind Co Ltd Electrostatic latent image developing device
US4634286A (en) * 1985-09-06 1987-01-06 Eastman Kodak Company Electrographic development apparatus having a continuous coil ribbon blender
US4993829A (en) * 1988-10-24 1991-02-19 Konica Corporation Developing apparatus for an image forming apparatus

Also Published As

Publication number Publication date
JPH0457080A (en) 1992-02-24
DE4120826C2 (en) 1993-06-03
DE4120826A1 (en) 1992-01-09

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