JP2009145473A - Developing device - Google Patents

Developing device Download PDF

Info

Publication number
JP2009145473A
JP2009145473A JP2007320860A JP2007320860A JP2009145473A JP 2009145473 A JP2009145473 A JP 2009145473A JP 2007320860 A JP2007320860 A JP 2007320860A JP 2007320860 A JP2007320860 A JP 2007320860A JP 2009145473 A JP2009145473 A JP 2009145473A
Authority
JP
Japan
Prior art keywords
toner
toner carrier
outer peripheral
peripheral surface
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.)
Pending
Application number
JP2007320860A
Other languages
Japanese (ja)
Inventor
Tomoharu Nishikawa
智晴 西川
Shunei Taniguchi
俊英 谷口
Toshiyuki Sakai
利幸 坂井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Business Technologies Inc
Original Assignee
Konica Minolta Business Technologies Inc
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 Konica Minolta Business Technologies Inc filed Critical Konica Minolta Business Technologies Inc
Priority to JP2007320860A priority Critical patent/JP2009145473A/en
Publication of JP2009145473A publication Critical patent/JP2009145473A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Dry Development In Electrophotography (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a toner from being deteriorated on an outer circumferential face of a toner carrier with regulation by a regulation member, or the toner from being film-formed on the outer circumferential face of the toner carrier, in a developing device of making the regulation member pressure-contact with the outer circumferential face of the toner carrier, to be held onto the outer circumferential face of the toner carrier, and of regulating the toner conveyed to a developing area opposed to the toner carrier, and to carry out proper development. <P>SOLUTION: A metal roller with a coarse-faced outer circumferential face is used as the toner carrier, a metal plate is used as the regulation member, a Vickers hardness Hv of the outer circumferential face of the toner carrier is brought within a range of 40-70, and regulation pressure of the regulation member pressure-contacting with the toner carrier is brought within a range of 10-25 N/m, in the developing device of making the regulation member 5 pressure-contact with the outer circumferential face of the toner carrier 4, to be held onto the outer circumferential face of the toner carrier, and of regulating the toner conveyed to the developing area opposed to the toner carrier. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、複写機,プリンタ,ファクシミリ、これらの複合機等の画像形成装置において、像担持体に形成された静電潜像を現像するのに使用する現像装置に係り、特に、トナーをトナー担持体の外周面に保持させて像担持体と対向する現像領域に搬送する途中において、このトナー担持体の外周面に規制部材を圧接させて現像領域に搬送されるトナーの量を規制するようにした現像装置に関するものである。   The present invention relates to a developing device used to develop an electrostatic latent image formed on an image carrier in an image forming apparatus such as a copying machine, a printer, a facsimile machine, or a combination of these machines. While being held on the outer peripheral surface of the carrier and being transported to the developing region facing the image carrier, a regulating member is pressed against the outer peripheral surface of the toner carrier to regulate the amount of toner conveyed to the developing region. The present invention relates to a developing device.

複写機,プリンタ,ファクシミリ、これらの複合機等の画像形成装置においては、像担持体に形成された静電潜像を現像するのに様々な現像装置が使用されている。   In an image forming apparatus such as a copying machine, a printer, a facsimile machine, or a combination of these, various developing devices are used to develop an electrostatic latent image formed on an image carrier.

そして、このような現像装置としては、現像剤にキャリアとトナーとを含む2成分現像方式の現像装置の他に、キャリアを使用しない1成分現像方式の現像装置が知られている。   As such a developing device, in addition to a two-component developing type developing device including a carrier and toner in a developer, a one-component developing type developing device that does not use a carrier is known.

ここで、上記の1成分現像方式の現像装置においては、トナー担持体によって像担持体と対向する現像領域に適当量のトナーが安定して搬送されるようにするため、一般に、トナーをトナー担持体の外周面に保持させて像担持体と対向する現像領域に搬送する途中において、このトナー担持体の外周面に規制部材を圧接させ、この規制部材によりトナー担持体の外周面に保持されて現像領域に搬送されるトナーの量を規制すると共に、このトナーを摩擦帯電させるようにしている。   Here, in the developing device of the above one-component development system, in order to stably convey an appropriate amount of toner to the developing area facing the image carrier by the toner carrier, the toner is generally carried by the toner. While being held on the outer peripheral surface of the body and being conveyed to the developing region facing the image carrier, a regulating member is pressed against the outer circumferential surface of the toner carrier, and is held by the regulating member on the outer circumferential surface of the toner carrier. The amount of toner conveyed to the development area is regulated and the toner is frictionally charged.

そして、上記のトナー担持体として、従来においては、一般に金属ローラや金属ローラの外周面に弾性層を設けたものが使用されている。   As the toner carrier, conventionally, a metal roller or a metal roller provided with an elastic layer on the outer peripheral surface is used.

しかし、金属ローラからなるトナー担持体を用いた場合、このトナー担持体によって十分な量のトナーを搬送させることが困難になると共に、このトナー担持体の外周面に規制部材を圧接させて、現像領域に搬送されるトナーを規制するようにした場合、この規制部材による圧接力によってトナーに多大な負荷が加わり、これによりトナー担持体の外周面におけるトナーが割れて微粉が発生した。特に、高速で画像形成を行うために現像速度を速くした場合には、トナーの割れが激しくなって微粉が多く発生し、この微粉が次第に増加してトナー担持体の外周面等に融着し、形成される画像に濃度むら等が発生するという問題があった。   However, when a toner carrier made of a metal roller is used, it becomes difficult to transport a sufficient amount of toner by this toner carrier, and a regulating member is pressed against the outer peripheral surface of the toner carrier to develop it. When the toner conveyed to the region is regulated, a large load is applied to the toner by the pressure contact force by the regulating member, and the toner on the outer peripheral surface of the toner carrier is broken and fine powder is generated. In particular, when the development speed is increased in order to form an image at high speed, the toner cracks severely and a lot of fine powder is generated. The fine powder gradually increases and is fused to the outer peripheral surface of the toner carrier. There is a problem that unevenness of density occurs in the formed image.

また、上記のように金属ローラの外周面に弾性層を設けたトナー担持体の場合、その製造コストが高くつくと共に、金属ローラの外周面に設けた弾性層が劣化して長期にわたって使用することが困難になったり、また金属ローラの外周面に設ける弾性層を厚くした場合には、トナー担持体の成形精度が悪くなって、安定した現像が行えなくなるという問題があった。   Further, in the case of the toner carrier having the elastic layer provided on the outer peripheral surface of the metal roller as described above, the manufacturing cost is high, and the elastic layer provided on the outer peripheral surface of the metal roller is deteriorated and used for a long time. However, when the elastic layer provided on the outer peripheral surface of the metal roller is made thick, there is a problem that the molding accuracy of the toner carrier is deteriorated and stable development cannot be performed.

また、従来においては、特許文献1に示されるように、トナー担持体として、金属ローラの表面にサンドブラスト処理して凹凸を形成すると共にこの凹凸形成部分をアルマイト処理したものを用い、金属ローラを用いたトナー担持体におけるトナーの搬送性能及び耐磨耗性を向上させるようにしたものが提案されている。   In addition, conventionally, as disclosed in Patent Document 1, a toner bearing member is formed by sandblasting the surface of a metal roller to form irregularities and alumite-treating the irregularity forming portion. There has been proposed an improved toner carrying performance and wear resistance in a toner carrier.

しかし、上記のようなトナー担持体の外周面に規制部材を圧接させて、トナー担持体の外周面に保持されて現像領域に搬送されるトナーを規制するようにした場合、特に金属板からなる規制部材を用いた場合には、このトナー担持体の表面硬度が高いため、規制部材の圧接によって、トナー担持体の外周面に保持されたトナーが割れて微粉が発生したり、トナーが劣化したりすると共に、長く使用すると、トナーがこのトナー担持体の外周面にフィルミングされて、トナーの帯電不良が生じ、適切な現像が行えなくなるという問題があった。   However, when the regulating member is pressed against the outer peripheral surface of the toner carrier as described above to regulate the toner held on the outer peripheral surface of the toner carrier and transported to the development region, it is made of a metal plate in particular. When a regulating member is used, since the surface hardness of the toner carrier is high, the toner held on the outer peripheral surface of the toner carrier is cracked and fine powder is generated or the toner deteriorates due to the pressure contact of the regulating member. In addition, when the toner is used for a long time, the toner is filmed on the outer peripheral surface of the toner carrying member, and there is a problem that the toner is poorly charged and proper development cannot be performed.

また、上記のようにトナー担持体の表面をアルマイト処理する場合、その製造コストが高くつくという問題もあった。
特開2001−318526号公報
In addition, when the surface of the toner carrier is anodized as described above, there is a problem that the manufacturing cost is high.
JP 2001-318526 A

本発明は、トナーをトナー担持体の外周面に保持させて像担持体と対向する現像領域に搬送する途中において、このトナー担持体の外周面に規制部材を圧接させて現像領域に搬送されるトナーを規制するようにした現像装置における上記のような様々な問題を解決することを課題とするものである。   In the present invention, while the toner is held on the outer peripheral surface of the toner carrier and is transported to the development region facing the image carrier, the regulating member is brought into pressure contact with the outer peripheral surface of the toner carrier and is transported to the development region. An object of the present invention is to solve the above-described various problems in a developing device that regulates toner.

そして、本発明における現像装置においては、特に、トナー担持体に外周面が粗面化された金属ローラを使用すると共に、このトナー担持体の外周面に圧接させる規制部材に金属板を使用した場合において、規制部材の圧接によって、トナー担持体の外周面に保持されたトナーが割れて微粉が発生したり、トナーが劣化したり、またトナーがこのトナー担持体の外周面にフィルミングされたりするのを適切に防止し、トナー担持体の外周面に保持されたトナーが規制部材により長期にわたって適切に規制されて、適切な現像が長期にわたって行えるようにすると共に、トナー担持体の製造コストも低減できるようにすることを課題とするものである。   In the developing device according to the present invention, in particular, when a metal roller having a roughened outer peripheral surface is used for the toner carrier, and a metal plate is used for the regulating member that is pressed against the outer peripheral surface of the toner carrier. In this case, the toner held on the outer peripheral surface of the toner carrying member is cracked to generate fine powder, the toner is deteriorated, or the toner is filmed on the outer peripheral surface of the toner carrying member. The toner held on the outer peripheral surface of the toner carrier is appropriately regulated over a long period of time by the regulating member so that proper development can be performed over a long period of time, and the manufacturing cost of the toner carrier is also reduced. The challenge is to make it possible.

本発明においては、上記のような課題を解決するため、トナーを外周面に保持して像担持体と対向する現像領域に搬送するトナー担持体と、このトナー担持体の外周面に圧接させて現像領域に搬送されるトナーを規制する規制部材とを有する現像装置において、上記のトナー担持体に外周面が粗面化された金属ローラを使用すると共に、上記の規制部材に金属板を使用し、上記のトナー担持体の外周面のビッカース硬度Hvを40〜70の範囲にすると共に、トナー担持体に圧接させる規制部材の規制圧を10〜25N/mの範囲にした。   In the present invention, in order to solve the above-described problems, a toner carrier that holds the toner on the outer peripheral surface and conveys the toner to a developing region facing the image carrier, and is brought into pressure contact with the outer peripheral surface of the toner carrier. In a developing device having a regulating member that regulates toner conveyed to the development area, a metal roller having a rough outer peripheral surface is used for the toner carrier, and a metal plate is used for the regulating member. The Vickers hardness Hv of the outer peripheral surface of the toner carrier was set in the range of 40 to 70, and the regulation pressure of the regulation member brought into pressure contact with the toner carrier was set in the range of 10 to 25 N / m.

ここで、上記のトナー担持体に圧接させる規制部材の規制圧を10〜25N/mの範囲にするのは、規制部材の規制圧が10N/m未満になると、トナー担持体の外周面に保持されたトナーを適切に規制して帯電させることが困難になる一方、規制部材の規制圧が25N/mを越えると、トナー担持体の外周面に保持されたトナーを規制した際に、トナーが割れたりして、トナーが劣化しやすくなるためである。   Here, the restriction pressure of the restriction member that is brought into pressure contact with the toner carrier is set in the range of 10 to 25 N / m because the restriction pressure of the restriction member is held on the outer peripheral surface of the toner carrier when the restriction pressure is less than 10 N / m. While it becomes difficult to properly charge the charged toner and charge it, if the regulating pressure of the regulating member exceeds 25 N / m, the toner held on the outer peripheral surface of the toner carrying member is regulated. This is because the toner is likely to deteriorate due to cracking.

また、トナー担持体の外周面のビッカース硬度Hvを40〜70の範囲にするのは、トナー担持体の外周面のビッカース硬度Hvが40未満になると、上記のように規制部材によって規制した場合に、このトナー担持体の外周面における凸部が次第に削られて、トナー担持体におけるトナーの搬送能力が次第に低下し、形成される画像の画像濃度が低下する一方、ビッカース硬度Hvが70を越えると、このトナー担持体の外周面にトナーが次第にフィルミングされて、トナーが適切に帯電されなくなるためである。   Also, the reason why the Vickers hardness Hv of the outer peripheral surface of the toner carrier is set in the range of 40 to 70 is that when the Vickers hardness Hv of the outer peripheral surface of the toner carrier is less than 40, it is regulated by the regulating member as described above. When the convex portion on the outer peripheral surface of the toner carrier is gradually scraped, the toner carrying ability of the toner carrier gradually decreases, and the image density of the formed image is lowered. On the other hand, when the Vickers hardness Hv exceeds 70, This is because the toner is gradually filmed on the outer peripheral surface of the toner carrier, and the toner is not appropriately charged.

ここで、上記のトナー担持体に用いる金属ローラを構成する材料としては、各種の金属を用いることができるが、軽量で低コストのアルミニウム系金属を用いることが好ましく、このトナー担持体の外周面におけるビッカース硬度Hvを上記の40〜70の範囲にするためには、例えば、Al−Mg系合金やAl−Mg−Si系合金を用い、これらの合金の組成比や熱処理する条件を変更させて調整することができる。   Here, as a material constituting the metal roller used for the toner carrier, various metals can be used, but it is preferable to use a lightweight and low-cost aluminum-based metal. In order to make the Vickers hardness Hv in the range of 40 to 70 above, for example, an Al—Mg alloy or an Al—Mg—Si alloy is used, and the composition ratio of these alloys and the heat treatment conditions are changed. Can be adjusted.

また、上記のトナー担持体の外周面における表面粗さが小さいと、このトナー担持体におけるトナーの搬送能力が低下して、十分なトナーを搬送させることが困難になる一方、表面粗さが大きくなりすぎると、上記の規制部材によるトナーの規制が適切に行われず、トナーが適切に帯電されなくなるため、このトナー担持体の外周面における算術平均粗さRaを1.0〜1.4μmの範囲にすることが好ましい。   In addition, if the surface roughness on the outer peripheral surface of the toner carrier is small, the toner carrying ability of the toner carrier is reduced, and it becomes difficult to carry sufficient toner, while the surface roughness is large. If it becomes too large, the toner is not properly regulated by the regulating member, and the toner is not properly charged. Therefore, the arithmetic average roughness Ra on the outer peripheral surface of the toner carrier is in the range of 1.0 to 1.4 μm. It is preferable to make it.

本発明の現像装置においては、上記のようにトナーを外周面に保持して像担持体と対向する現像領域に搬送するトナー担持体に外周面が粗面化された金属ローラを使用すると共に、このトナー担持体の外周面に圧接させて現像領域に搬送されるトナーを規制する規制部材に金属板を使用し、上記のトナー担持体の外周面のビッカース硬度Hvを40〜70の範囲にすると共に、トナー担持体に圧接させる規制部材の規制圧を10〜25N/mの範囲にしたため、トナー担持体の外周面におけるトナーが規制部材による規制によって劣化したり、トナーがこのトナー担持体の外周面にフィルミングされたりするのが適切に防止されるようになる。   In the developing device of the present invention, as described above, a metal roller having a roughened outer peripheral surface is used for the toner carrier that holds the toner on the outer peripheral surface and conveys the toner to the developing region facing the image carrier. A metal plate is used as a regulating member that regulates the toner conveyed to the development area by being pressed against the outer circumferential surface of the toner carrier, and the Vickers hardness Hv of the outer circumferential surface of the toner carrier is in the range of 40 to 70. At the same time, the regulation pressure of the regulating member that is brought into pressure contact with the toner carrier is set in the range of 10 to 25 N / m, so that the toner on the outer peripheral surface of the toner carrier is deteriorated by regulation by the regulating member, or the toner is Filming on the surface is appropriately prevented.

この結果、本発明の現像装置においては、トナー担持体に外周面が粗面化された金属ローラを使用すると共に、このトナー担持体の外周面に圧接させて現像領域に搬送されるトナーの量を規制する規制部材に金属板を使用した場合においても、このトナー担持体の外周面に保持されたトナーが規制部材により長期にわたって適切に規制されるようになり、適切な現像が長期にわたって安定して行え、良好な画像形成が長期にわたって安定して行えるようになる。   As a result, in the developing device of the present invention, a metal roller having a roughened outer peripheral surface is used for the toner carrier, and the amount of toner conveyed to the developing region while being pressed against the outer peripheral surface of the toner carrier. Even when a metal plate is used as a regulating member for regulating the toner, the toner held on the outer peripheral surface of the toner carrier is appropriately regulated for a long time by the regulating member, and appropriate development is stabilized for a long time. And good image formation can be performed stably over a long period of time.

また、本発明の現像装置においては、粗面化された金属ローラの外周面をアルマイト処理する必要がないため、トナー担持体の製造コストも低減される。   Further, in the developing device of the present invention, since it is not necessary to anodize the outer peripheral surface of the roughened metal roller, the manufacturing cost of the toner carrier is also reduced.

次に、この発明の実施形態に係る現像装置を添付図面に基づいて具体的に説明する。なお、本発明に係る現像装置は、下記の実施形態に示したものに限定されず、その要旨を変更しない範囲において適宜変更して実施できるものである。   Next, a developing device according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings. Note that the developing device according to the present invention is not limited to the one shown in the following embodiment, and can be appropriately changed and implemented without changing the gist thereof.

この実施形態の現像装置においては、図1に示すように、装置本体1内に収容されたトナーtをトナー送り部材2によりローラ状になったトナー供給部材3に送り、このトナー供給部材3を回転させて、このトナー供給部材3からトナーtを金属ローラからなるトナー担持体4に供給するようにしている。   In the developing device of this embodiment, as shown in FIG. 1, the toner t accommodated in the apparatus main body 1 is sent to the toner supply member 3 formed into a roller shape by the toner feeding member 2, and the toner supply member 3 is The toner t is rotated so that the toner t is supplied from the toner supply member 3 to the toner carrier 4 made of a metal roller.

そして、このように供給されたトナーtをこのトナー担持体4の外周面に保持させた状態で、このトナー担持体4の回転によってトナーtを像担持体Pに向けて搬送させると共に、装置本体1内に設けられた金属板からなる規制部材5の端部を上記のトナー担持体4の外周面に圧接させて、上記のトナー担持体4の外周面に保持されて搬送されるトナーtの量を規制すると共にこのトナーtを帯電させるようにしている。   The toner t thus supplied is held on the outer peripheral surface of the toner carrier 4, and the toner t is conveyed toward the image carrier P by the rotation of the toner carrier 4 and the apparatus main body. The end portion of the regulating member 5 made of a metal plate provided in 1 is brought into pressure contact with the outer peripheral surface of the toner carrier 4 so that the toner t held and conveyed by the outer peripheral surface of the toner carrier 4 is conveyed. The amount is regulated and the toner t is charged.

そして、このように規制部材5により規制されて帯電されたトナーtを、このトナー担持体4により像担持体Pと対向する現像領域に導いて、像担持体Pに形成された静電潜像を現像するようにしている。   Then, the toner t regulated and charged by the regulating member 5 is guided to the developing region facing the image carrier P by the toner carrier 4, and the electrostatic latent image formed on the image carrier P is guided. To develop.

ここで、この実施形態の現像装置においては、上記の金属ローラからなるトナー担持体4として、その外周面をブラスト処理などにより粗面化させて、外周面の算術平均粗さRaを1.0〜1.4μmの範囲にすると共に、前記のようにAl−Mg系合金やAl−Mg−Si系合金における合金の組成比や、熱処理する条件を調整して、外周面におけるビッカース硬度Hvを40〜70の範囲にした金属ローラを用いるようにしている。   Here, in the developing device of this embodiment, the outer peripheral surface of the toner carrier 4 made of the metal roller is roughened by blasting or the like, and the arithmetic average roughness Ra of the outer peripheral surface is 1.0. The Vickers hardness Hv on the outer peripheral surface is adjusted to 40 μm by adjusting the composition ratio of the alloy in the Al—Mg alloy or Al—Mg—Si alloy and the heat treatment conditions as described above. A metal roller having a range of ˜70 is used.

一方、上記の金属板からなる規制部材5としては、一般に、鍍金した鉄,SUS,リン青銅等の金属で構成されたものが用いられ、特に、上記のトナーtが負帯電性である場合には、その帯電性を高めるため、SUSやリン青銅で構成された構成されたものを用いることが好ましい。   On the other hand, as the restricting member 5 made of the metal plate, generally, a member made of a metal such as plated iron, SUS, phosphor bronze or the like is used, and in particular, when the toner t is negatively charged. In order to improve the charging property, it is preferable to use a material composed of SUS or phosphor bronze.

そして、上記の金属板からなる規制部材5を上記のトナー担持体4の外周面に圧接させるにあたっては、この規制部材5の弾性係数や厚み等に応じて、上記のトナー担持体4に対する規制部材5の食込み量を調整して、規制部材5による規制圧が10〜25N/mの範囲になるようにしている。   When the regulating member 5 made of the metal plate is brought into pressure contact with the outer peripheral surface of the toner carrier 4, the regulating member for the toner carrier 4 according to the elastic coefficient or thickness of the regulating member 5. 5 is adjusted so that the regulation pressure by the regulation member 5 is in the range of 10 to 25 N / m.

このようにすると、前記のようにトナー担持体4の外周面におけるトナーtが規制部材5による規制によって劣化したり、トナーtがトナー担持体4の外周面にフィルミングされたりするのが防止され、トナー担持体4の外周面に保持されたトナーtが規制部材4により長期にわたって適切に規制され、像担持体Pに形成された静電潜像が適切に現像されて、長期にわたって良好な画像が安定して得られるようになる。   In this way, it is possible to prevent the toner t on the outer peripheral surface of the toner carrier 4 from being deteriorated due to the restriction by the restriction member 5 and the toner t from being filmed on the outer peripheral surface of the toner carrier 4 as described above. The toner t held on the outer peripheral surface of the toner carrier 4 is appropriately regulated over a long period of time by the regulating member 4, and the electrostatic latent image formed on the image carrier P is appropriately developed, so that a good image can be obtained over a long period of time. Can be obtained stably.

次に、市販のプリンタ(コニカミノルタ社製:Magicolor2430)を改造し、使用するトナー担持体及び規制部材の種類を変更させるようにした。   Next, a commercially available printer (manufactured by Konica Minolta: Magiccolor 2430) was modified to change the type of toner carrier and regulating member used.

ここで、トナー担持体としては、Al−Mg−Si系合金を用い、熱処理する条件を変更させて外周面におけるビッカース硬度Hvが34,43,45,53,56になった5種類のAl−Mg−Si系合金製のトナー担持体A1〜A5と、Al−Mg系合金を用い、熱処理する条件を変更させて外周面におけるビッカース硬度Hvが65,67,85になった3種類のAl−Mg系合金製のトナー担持体B1〜B3を用いるようにした。なお、上記の各トナー担持体の外周面における表面粗さについては、何れもブラスト処理により外周面の算術平均粗さRaが約1.2μmになるようにした。   Here, as the toner carrier, an Al—Mg—Si-based alloy is used, and five types of Al— in which the Vickers hardness Hv on the outer peripheral surface is changed to 34, 43, 45, 53, 56 by changing the heat treatment conditions. Three types of Al— in which toner carrier A1 to A5 made of Mg—Si alloy and Al—Mg alloy were used and the heat treatment conditions were changed to give Vickers hardness Hv of 65, 67, 85 on the outer peripheral surface. Toner carriers B1 to B3 made of Mg alloy were used. Note that the surface roughness of the outer peripheral surface of each toner carrier described above was such that the arithmetic average roughness Ra of the outer peripheral surface was about 1.2 μm by blasting.

また、規制部材としては、厚みが40μm,80μmになった2種類のリン青銅製の規制部材C1,C2と、厚みが40μm,60μm,80μmになった3種類のSUS304製の規制部材D1〜D3を用いるようにした。   In addition, as the restricting members, two kinds of phosphor bronze restricting members C1 and C2 having thicknesses of 40 μm and 80 μm and three kinds of restricting members D1 to D3 made of SUS304 having thicknesses of 40 μm, 60 μm, and 80 μm are used. Was used.

そして、実施例1〜4及び比較例1〜4においては、上記のトナー担持体A1〜A5,B1〜B3と、規制部材C1,C2,D1〜D3とを、下記の表1に示すように組み合わせて使用すると共に、トナー担持体に対する規制部材の食込み量を調整して、トナー担持体に対する規制部材の規制圧を、同表に示すように、実施例1,2では12N/mに、実施例3,4では23N/mに、比較例1では7N/mに、比較例2では18N/mに、比較例3では29N/mに、比較例4では16N/mにした。   In Examples 1 to 4 and Comparative Examples 1 to 4, the toner carriers A1 to A5, B1 to B3 and the regulating members C1, C2, D1 to D3 are as shown in Table 1 below. In combination with the toner carrying body, the amount of biting of the regulating member with respect to the toner carrier is adjusted, and the regulation pressure of the regulating member with respect to the toner carrier is set to 12 N / m in Examples 1 and 2, as shown in the table. In Examples 3 and 4, it was 23 N / m, in Comparative Example 1 was 7 N / m, in Comparative Example 2 was 18 N / m, in Comparative Example 3 was 29 N / m, and in Comparative Example 4 was 16 N / m.

Figure 2009145473
Figure 2009145473

そして、上記の実施例1〜4及び比較例1〜4の各現像装置を用いたプリンタを使用して、それぞれ画像濃度及びカブリの評価を行い、その結果を下記の表2に示した。   The printers using the developing devices of Examples 1 to 4 and Comparative Examples 1 to 4 were used to evaluate image density and fog, and the results are shown in Table 2 below.

ここで、画像濃度については、それぞれ黒ベタ画像を4500枚印字し、初期、1000枚、2500枚、4500枚において、それぞれの画像濃度を反射濃度計(Macbeth社製:TD904)により測定して、画像濃度の評価を行った。   Here, for the image density, 4500 black solid images were printed, and the initial image density was measured with a reflection densitometer (Macbeth: TD904) at 1000 sheets, 2500 sheets, and 4500 sheets. Image density was evaluated.

なお、画像濃度の評価については、反射濃度が1.0以上1.2未満の場合を(5)、1.2以上1.4未満の場合を(4)、0.8以上1.0未満の場合を(3)、1.4以上の場合を(2)、0.8未満の場合を(1)にした。なお、好ましい反射濃度の範囲は1.0以上1.4未満であり、反射濃度が1.0未満になると、十分な画像濃度が得られなくなる一方、反射濃度が1.4以上になると、文字や細線の再現性が悪くなる。   Regarding the evaluation of the image density, (5) when the reflection density is 1.0 or more and less than 1.2, (4) when the reflection density is 1.2 or more and less than 1.4, and 0.8 or more and less than 1.0. The case of (3), the case of 1.4 or more is (2), and the case of less than 0.8 is (1). The preferable range of the reflection density is 1.0 or more and less than 1.4. If the reflection density is less than 1.0, a sufficient image density cannot be obtained. And the reproducibility of fine lines is poor.

また、カブリについては、それぞれ白ベタ画像を4500枚印字し、初期、1000枚、2500枚、4500枚において、それぞれカブリの評価を行った。   As for the fog, 4500 white solid images were printed, and the fog was evaluated on the initial 1000 sheets, 2500 sheets, and 4500 sheets.

なお、カブリの評価については、画像上にカブリが全くない場合を(5)、顕微鏡観察で若干カブリが確認できるが、目視では確認できない場合を(4)、目視でカブリを確認できるが、実用上問題がない場合を(3)、目視でカブリを確認でき、実用上問題となる場合を(2)、画像全体にカブリが多く発生した場合を(1)にした。   As for the evaluation of the fog (5), when there is no fog on the image, the fog can be slightly confirmed by microscopic observation, but when it cannot be visually confirmed (4), the fog can be confirmed by visual observation. The case where there is no problem (3), the fog can be visually confirmed, and the case where the problem occurs in practice (2), and the case where a lot of fog occurs in the entire image is (1).

Figure 2009145473
Figure 2009145473

この結果から明らかなように、外周面が粗面化された金属ローラからなるトナー担持体と、金属板からなる規制部材を用いた場合において、トナー担持体の外周面のビッカース硬度Hvが40〜70の条件を満たさない比較例2,5の現像装置を用いた場合や、規制部材の規制圧が10〜25N/mの条件を満たさない比較例1,3の現像装置を用いた場合には、適切な画像濃度が得られなかったり、画像にカブリが発生したりした。   As is apparent from this result, when a toner carrier made of a metal roller having a rough outer peripheral surface and a regulating member made of a metal plate are used, the Vickers hardness Hv of the outer peripheral surface of the toner carrier is 40 to 40. When the developing devices of Comparative Examples 2 and 5 that do not satisfy the condition of 70 are used, or when the developing devices of Comparative Examples 1 and 3 that do not satisfy the condition of the regulating pressure of the regulating member of 10 to 25 N / m are used. Appropriate image density could not be obtained or fogging occurred in the image.

これに対して、トナー担持体の外周面のビッカース硬度Hvが40〜70の範囲であると共に、トナー担持体に圧接させる規制部材の規制圧を10〜25N/mの範囲にした実施例1〜4の現像装置を用いた場合には、適切な画像濃度を有すると共に、カブリのない良好な画像が得られた。   On the other hand, Examples 1 to 3 in which the Vickers hardness Hv of the outer peripheral surface of the toner carrier is in the range of 40 to 70 and the regulation pressure of the regulation member that is in pressure contact with the toner carrier is in the range of 10 to 25 N / m. When the developing device 4 was used, a good image having an appropriate image density and free from fogging was obtained.

本発明の一実施形態に係る現像装置を用いて、像担持体に形成された静電潜像を現像する状態を示した概略説明図である。FIG. 3 is a schematic explanatory view showing a state in which an electrostatic latent image formed on an image carrier is developed using a developing device according to an embodiment of the present invention.

符号の説明Explanation of symbols

1 装置本体
2 トナー送り部材
3 トナー供給部材
4 トナー担持体
5 規制部材
P 像担持体
t トナー
DESCRIPTION OF SYMBOLS 1 Apparatus main body 2 Toner feeding member 3 Toner supply member 4 Toner carrier 5 Regulating member P Image carrier t Toner

Claims (3)

トナーを外周面に保持して像担持体と対向する現像領域に搬送するトナー担持体と、このトナー担持体の外周面に圧接させて現像領域に搬送されるトナーを規制する規制部材とを有する現像装置において、上記のトナー担持体に外周面が粗面化された金属ローラが使用されると共に、上記の規制部材に金属板が使用され、上記のトナー担持体の外周面のビッカース硬度Hvが40〜70の範囲であり、上記のトナー担持体に圧接させる規制部材の規制圧が10〜25N/mの範囲であることを特徴とする現像装置。   A toner carrier that holds the toner on the outer peripheral surface and conveys the toner to the developing region facing the image carrier; and a regulating member that presses the outer peripheral surface of the toner carrier and regulates the toner conveyed to the developing region. In the developing device, a metal roller having a rough outer peripheral surface is used for the toner carrier, and a metal plate is used for the regulating member, and the Vickers hardness Hv of the outer peripheral surface of the toner carrier is A developing device having a range of 40 to 70, wherein a regulation pressure of a regulation member to be brought into pressure contact with the toner carrier is in a range of 10 to 25 N / m. 請求項1に記載した現像装置において、上記のトナー担持体における金属ローラがアルミニウム系金属で構成されていることを特徴とする現像装置。   2. The developing device according to claim 1, wherein the metal roller in the toner carrier is made of an aluminum-based metal. 請求項1又は請求項2に記載した現像装置において、上記のトナー担持体の外周面の算術平均粗さRaが1.0〜1.4μmの範囲であることを特徴とする現像装置。   3. The developing device according to claim 1, wherein the arithmetic average roughness Ra of the outer peripheral surface of the toner carrier is in the range of 1.0 to 1.4 [mu] m.
JP2007320860A 2007-12-12 2007-12-12 Developing device Pending JP2009145473A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2007320860A JP2009145473A (en) 2007-12-12 2007-12-12 Developing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2007320860A JP2009145473A (en) 2007-12-12 2007-12-12 Developing device

Publications (1)

Publication Number Publication Date
JP2009145473A true JP2009145473A (en) 2009-07-02

Family

ID=40916164

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2007320860A Pending JP2009145473A (en) 2007-12-12 2007-12-12 Developing device

Country Status (1)

Country Link
JP (1) JP2009145473A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10895823B2 (en) * 2019-05-15 2021-01-19 Canon Kabushiki Kaisha Developing roller, process cartridge and electrophotographic image forming apparatus
WO2021157372A1 (en) * 2020-02-06 2021-08-12 京セラドキュメントソリューションズ株式会社 Image forming device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03217877A (en) * 1990-01-24 1991-09-25 Matsushita Electric Ind Co Ltd Image forming device
JPH1124399A (en) * 1997-07-03 1999-01-29 Fuji Xerox Co Ltd Image forming method and image forming device used therein
JP2000242070A (en) * 1999-02-22 2000-09-08 Canon Inc Method for forming image
JP2001147586A (en) * 1999-11-19 2001-05-29 Ricoh Co Ltd Developing device
JP2004233973A (en) * 2003-01-08 2004-08-19 Canon Inc Image forming method and toner
JP2005017972A (en) * 2003-06-30 2005-01-20 Ricoh Co Ltd Method of manufacturing developer carrier, developer carrier, and image forming apparatus equipped with the same
JP2007178551A (en) * 2005-12-27 2007-07-12 Ricoh Co Ltd Toner kit, developer, process cartridge, image forming method and image forming apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03217877A (en) * 1990-01-24 1991-09-25 Matsushita Electric Ind Co Ltd Image forming device
JPH1124399A (en) * 1997-07-03 1999-01-29 Fuji Xerox Co Ltd Image forming method and image forming device used therein
JP2000242070A (en) * 1999-02-22 2000-09-08 Canon Inc Method for forming image
JP2001147586A (en) * 1999-11-19 2001-05-29 Ricoh Co Ltd Developing device
JP2004233973A (en) * 2003-01-08 2004-08-19 Canon Inc Image forming method and toner
JP2005017972A (en) * 2003-06-30 2005-01-20 Ricoh Co Ltd Method of manufacturing developer carrier, developer carrier, and image forming apparatus equipped with the same
JP2007178551A (en) * 2005-12-27 2007-07-12 Ricoh Co Ltd Toner kit, developer, process cartridge, image forming method and image forming apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10895823B2 (en) * 2019-05-15 2021-01-19 Canon Kabushiki Kaisha Developing roller, process cartridge and electrophotographic image forming apparatus
WO2021157372A1 (en) * 2020-02-06 2021-08-12 京セラドキュメントソリューションズ株式会社 Image forming device
JPWO2021157372A1 (en) * 2020-02-06 2021-08-12
JP7315038B2 (en) 2020-02-06 2023-07-26 京セラドキュメントソリューションズ株式会社 image forming device

Similar Documents

Publication Publication Date Title
JP2008090160A (en) Developer amount regulating blade and developing device using the same
JP2009145473A (en) Developing device
JP2009210668A (en) Process cartridge, developing device equipped therewith, and image forming device
JP2007147682A (en) Developing device, processing cartridge, and image forming apparatus
JP3488123B2 (en) Developer carrier, method of manufacturing the same, and developing device
JP2009145474A (en) Developing device
JP4715728B2 (en) Developing roller manufacturing method, developing roller, developing device, and image forming apparatus
JP2008145885A (en) Developing device
JP2010197934A (en) Electrophotographic photoreceptor and image forming apparatus
JP2008292594A (en) Developing roller, developing device, and image forming apparatus
WO2003010608A1 (en) Cylindrical developer carrier and production method thereof
JP2008040400A (en) Development device, image forming apparatus using the same, developer carrier, and method for producing the same
JP2006235276A (en) Developing roller and its manufacturing method
JP2004157276A (en) Image forming apparatus
JP5802395B2 (en) Developing roller, developing device, developing method, and image forming apparatus
JP4477970B2 (en) Developing device, image forming apparatus, and process cartridge
JP2008102446A (en) Method for manufacturing developing roller, developing roller, developing device and image forming apparatus
JP2012155108A (en) Developing roller, developing device and image forming apparatus
WO2022014534A1 (en) Developing device and image forming device provided with same
JP2007233070A (en) Developer control member and image forming apparatus
JP4035205B2 (en) Developer amount regulating member
JP2017116920A (en) Developing device, process unit, and image forming apparatus
JP2010002546A (en) Development device and image forming device
JP2004280131A (en) Image forming apparatus
JP2008292628A (en) Developing device and image forming apparatus

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20100723

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100727

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20101214

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20110412