JP2761740B2 - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JP2761740B2 JP2761740B2 JP29423188A JP29423188A JP2761740B2 JP 2761740 B2 JP2761740 B2 JP 2761740B2 JP 29423188 A JP29423188 A JP 29423188A JP 29423188 A JP29423188 A JP 29423188A JP 2761740 B2 JP2761740 B2 JP 2761740B2
- Authority
- JP
- Japan
- Prior art keywords
- toner
- developing device
- conveying member
- supply member
- toner supply
- 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 - Fee Related
Links
Landscapes
- Dry Development In Electrophotography (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は一成分トナー現像装置に関し、より詳しく
は、トナー搬送部材上にトナー薄層を形成させ現像を行
ない良質な画像を得るようにした電子写真における一成
分トナー現像装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a one-component toner developing device, and more specifically, to form a thin toner layer on a toner conveying member and perform development to obtain a high quality image. The present invention relates to a one-component toner developing device for electrophotography.
［従来の技術］ 電子写真や静電記録等で採用される乾式現像方式に
は、トナー及びキャリアからなる二成分系現像剤を用い
る方式と、キャリアを含まない一成分系現像剤を用いる
方式がある。前者の方式には、比較的安定して良好な画
像が得られるが、キャリアの劣化並びにトナーとキャリ
アとの混合比の変動が発生しやすいことから長期間にわ
たって一定の品質が得られ難く、また、装置の維持管理
性やコンパクト化に難点がある。そこで、こうした欠点
を有しない後者の一成分系現像剤を用いる方式が注目さ
れるようになっている。[Prior art] Dry development methods employed in electrophotography, electrostatic recording and the like include a method using a two-component developer composed of a toner and a carrier and a method using a one-component developer not containing a carrier. is there. In the former method, a good image can be obtained relatively stably, but it is difficult to obtain a constant quality over a long period of time because deterioration of the carrier and fluctuation of the mixing ratio between the toner and the carrier are apt to occur. However, there is a problem in the maintenance and management of the apparatus and the downsizing. Therefore, attention has been paid to a system using the latter one-component developer which does not have such a drawback.
ところで、この方式においては、通常少なくとも一つ
のトナー搬送部材によってトナー（現像剤）を搬送し、
かつ搬送されたトナーによって潜像担持体に形成された
静電潜像を可視像化する手段がとられているが、その
際、トナー搬送部材表面を搬送されるトナーの層厚は極
力薄くしなければならないとされている。このことは二
成分系現像剤であってもキャリアが非常に小径なものを
用いる場合にも当てはまることであり、また、特に一成
分系現像剤を使用しそのトナーとして電気抵抗の高いも
のを用いた時は、現像装置によってこのトナーを帯電さ
せる必要があるため、トナー層厚は著しく薄くされなけ
ればならない。この層厚が厚いとトナー層の表面近くだ
けが帯電し、トナー層全体が均一に帯電し難くなるから
である。By the way, in this method, usually, toner (developer) is conveyed by at least one toner conveying member,
Means for visualizing the electrostatic latent image formed on the latent image carrier by the transported toner is used. At this time, the layer thickness of the toner transported on the surface of the toner transport member is as thin as possible. It has to be done. This is true even when a two-component developer having a very small carrier diameter is used.In particular, a one-component developer having a high electric resistance as a toner is used. In such a case, the toner must be charged by a developing device, so that the thickness of the toner layer must be significantly reduced. This is because if the layer thickness is large, only the surface of the toner layer is charged, and it is difficult to uniformly charge the entire toner layer.
かかる要請から、トナー搬送部材上のトナー層厚を規
制する手段（トナー層厚規制手段）にいろいろな方法が
提案されており、代表例としては、ドクターブレードを
用い、このブレードをトナー搬送部材に対置させ、これ
によりトナー搬送部材表面の搬送されるトナーを押圧部
材（ドクターブレード）で押さえつけてトナー層厚を制
御するものである。In response to such a request, various methods have been proposed as means for regulating the toner layer thickness on the toner conveying member (toner layer thickness regulating means). As a typical example, a doctor blade is used, and this blade is used as a toner conveying member. In this case, the toner conveyed on the surface of the toner conveying member is pressed by a pressing member (doctor blade) to control the thickness of the toner layer.
しかしながら、これだけではトナーがトナー搬送部材
に均一に搬送されにくい。そのため、トナー搬送部材に
接触しつつ自在に回転可能に支持されており、トナーを
トナー搬送部材上に供給するトナー供給手段を有する現
像装置が提案されているが、現像を連続して行なうと、
トナーをトナー搬送部材へ供給する能力が低下し、画像
濃度の低下を招くようになる。その原因としては、トナ
ーホッパー内からトナー供給部材へのトナー補給性の低
下、さらにはトナー供給部材からトナー搬送部材へのト
ナー補給性の低下の２つが挙げられる。上記欠点の解決
のために、トナーに界面活性物質及び流動性改質剤等の
添加を試みたが、まだ十分には解決されていない。However, it is difficult for the toner to be uniformly conveyed to the toner conveying member by this alone. Therefore, a developing device that is rotatably supported while being in contact with the toner conveying member and has a toner supply unit that supplies the toner onto the toner conveying member has been proposed.
The ability to supply toner to the toner conveying member is reduced, which causes a decrease in image density. The two causes are a decrease in the toner supply ability from the inside of the toner hopper to the toner supply member and a decrease in the toner supply ability from the toner supply member to the toner transport member. Attempts have been made to add surfactants, fluidity modifiers, and the like to toners in order to solve the above-mentioned drawbacks, but these have not yet been sufficiently solved.
［発明が解決しようとする課題］ 本発明は、トナー搬送部材上にトナー薄層を形成させ
現像を行ない、良質な画像を得るようにした電子写真に
おける一成分現像装置において、連続複写後も画像に異
常がみられず、初期と同等の画像品質が得られる現像装
置を提供することを解決すべき課題とするものである。[Problems to be Solved by the Invention] The present invention relates to a one-component developing apparatus for electrophotography in which a thin toner layer is formed on a toner conveying member and development is performed to obtain a high quality image. It is an object of the present invention to provide a developing device in which no abnormality is observed and an image quality equivalent to that of the initial stage is obtained.
［課題を解決するための手段］ 本発明の一成分現像装置は、少なくともトナー搬送部
材と、トナー層厚規制部材と、該トナー搬送部材に接触
しつつ自在に回転可能に支持されたトナーを該トナー搬
送部材に供給するトナー供給部材とを有する現像装置に
関するものであり、トナーが該供給部材に供給された
後、トナー搬送部材に供給され、更にトナー層厚を規制
するトナー層厚規制部材を介してトナーを薄層化せし
め、次いで、そのトナーを潜像担持体に供給して潜像を
現像する装置である。[Means for Solving the Problems] A one-component developing apparatus according to the present invention includes a toner conveying member, a toner layer thickness regulating member, and a toner rotatably supported while being in contact with the toner conveying member. And a toner supply member that supplies the toner to the toner transport member. The toner supply member supplies the toner to the toner transport member, and then supplies the toner to the toner transport member. This is an apparatus that develops a latent image by thinning the toner through the toner layer and then supplying the toner to a latent image carrier.
本発明者らは鋭意検討し、前記現像装置に負帯電性ト
ナーを使用する場合、前記欠点は、アミノ基を含むシラ
ンカップリング剤で少なくともトナー供給材表面を被覆
した現像装置を使用することで解決した。The present inventors have studied diligently, and when using a negatively chargeable toner in the developing device, the disadvantage is that a developing device in which at least the toner supply material surface is coated with a silane coupling agent containing an amino group is used. Settled.
上記現像装置により目的が達成される原因は定かでは
ないが、トナー供給部材をアミノ基を含むシランカップ
リング剤で被覆することにより、現像部のトナータンク
内の負帯電性トナーがトナー供給部材に円滑に補給さ
れ、現像装置内のトナーの流れがスムーズになり、トナ
ー搬送部材上のトナー層厚が常に均一に保てるようにな
るためと考えられる。Although the cause of achieving the object by the developing device is not clear, by coating the toner supply member with a silane coupling agent containing an amino group, the negatively-charged toner in the toner tank of the developing unit is applied to the toner supply member. It is considered that the toner is supplied smoothly, the flow of the toner in the developing device becomes smooth, and the thickness of the toner layer on the toner conveying member can always be kept uniform.
更に該トナー供給部材に前記のトナー搬送部材より０
〜500V負電位のバイアスを印加させることにより、トナ
ー供給部材上のトナーが滞留することなく、円滑にトナ
ー搬送部材上に供給され、上記欠点の解決効果は大きく
なることが判明した。Further, the toner supply member is set at 0
It has been found that by applying a bias of -500 V negative potential, the toner on the toner supply member is smoothly supplied to the toner conveying member without stagnation, and the effect of solving the above-mentioned disadvantage is enhanced.
本発明で使用されるアミノ基を含むシランカップリン
グ剤としては、下記一般式で示される化合物が好適なも
のとして例示される。As the silane coupling agent containing an amino group used in the present invention, a compound represented by the following general formula is exemplified as a preferable one.
（但し、R1,R2：同一または異なる炭素数１〜３のアル
キル基 X:フェニル基または-(CH2)n-NH2（n:1〜３の整数） l:1〜５の整数 m:2または３ 上記一般式で示される化合物の具体例としては以下の
ようなものがある。 (However, R 1 , R 2 : the same or different alkyl groups having 1 to 3 carbon atoms X: phenyl group or — (CH 2 ) n —NH 2 (n: an integer of 1 to 3) l: an integer of 1 to 5 m: 2 or 3 Specific examples of the compound represented by the above general formula include the following.
なお、本発明のトナー供給部材としては、スポンジ状
材質、ファーブラシ状材質等のものが考えられ、それら
が導電性材料であることも考えられるが、これらに限定
されるものではない。 In addition, as the toner supply member of the present invention, a sponge-like material, a fur brush-like material, and the like are conceivable, and it is conceivable that they are conductive materials, but are not limited thereto.
また、本発明の物質をトナー供給部材表面に被覆する
方法としては、必要に応じて溶剤あるいは分散媒中に溶
解ないし分散させて得た塗布液中にトナー供給部材を浸
漬、スプレイ、刷毛塗り等により塗布することが可能で
ある。Further, as a method for coating the surface of the toner supply member with the substance of the present invention, the toner supply member may be immersed in a coating solution obtained by dissolving or dispersing it in a solvent or a dispersion medium, spraying, brushing, etc., if necessary. Can be applied.
本発明において重要なことは、トナー供給部材がトナ
ーに対して、正帯電性を示す物質で表面処理されている
ことであり、正帯電性を示さない物質の場合は、トナー
がトナー供給部材によって負に十分摩擦帯電されず供給
部材に十分トナーが補給されず、更にトナー搬送部材へ
もトナーの供給が不十分となり、均一に帯電した均一な
トナー薄層が得られない。また更に重要なことは、トナ
ー供給部材表面の被覆材料としては、長期間使用して
も、熱的にも経時的にも変質せず安定にトナーに対して
正に帯電しなければならないことである。What is important in the present invention is that the toner supply member is surface-treated with a substance having a positive charge property with respect to the toner. As a result, the toner is not sufficiently supplied to the supply member, and the toner is not sufficiently supplied to the toner conveying member, so that a uniformly charged thin toner layer cannot be obtained. More importantly, as a coating material on the surface of the toner supply member, the toner must be stably positively charged without being deteriorated thermally or with time even when used for a long period of time. is there.
また、トナー供給部材にトナー搬送部材より０〜−50
0Vのバイアスを印加することにより、トナー供給部材か
らトナー搬送部材上へトナーの補給がすみやかに行われ
る。該印加バイアスが正電位であると、トナーの搬送部
材上への移行が不十分となり、−500Vより負に大きい
と、トナー搬送部材上へのトナーフィルミングが発生
し、ランニングにより地かぶり等が画像上に生じる。In addition, the toner supply member is provided with 0 to -50 from the toner conveying member.
By applying a bias of 0 V, the toner is immediately supplied from the toner supply member to the toner transport member. When the applied bias is at a positive potential, the transfer of the toner onto the conveying member becomes insufficient. When the applied bias is more negative than -500 V, toner filming on the toner conveying member occurs, and ground fogging or the like is caused by running. Occurs on the image.
本発明の現像装置に用いられるトナーとしては、従来
から知られている静電荷現像用負帯電性トナーとして使
用されているものの実質的にすべてが有効に用いられ
る。すなわち、トナーは非磁性、磁性のいずれもが用い
られる。As the toner used in the developing device of the present invention, substantially all of conventionally known negatively chargeable toners for electrostatic charge development can be effectively used. That is, both non-magnetic and magnetic toners are used.
さらに、トナーは結着樹脂中に着色剤を分散させた着
色粒子であり、また、帯電付与するために染料・顔料・
あるいは、いわゆる荷電制御剤を含有してもよい。ま
た、コロイダルシリカのような流動性向上剤、酸化セリ
ウム、炭化珪素等の研磨剤、ステアリン酸金属塩等の滑
剤、酸化錫のような導電性付与剤等を必要に応じて含有
させてもよい。Further, the toner is a colored particle in which a colorant is dispersed in a binder resin.
Or you may contain what is called a charge control agent. Further, a fluidity improver such as colloidal silica, a polishing agent such as cerium oxide and silicon carbide, a lubricant such as metal stearate, and a conductivity imparting agent such as tin oxide may be contained as necessary. .
［実施例］ 以下実施例を挙げて本発明を説明する。EXAMPLES The present invention will be described below with reference to examples.
実施例１ スチレン系樹脂（D-125エッソ社製） 85重量部 カーボンブラック（＃44三菱カーボン社製） 10重量部 含クロムモノアゾ染料 ５重量部 上記組成の混合物をヘンシェルミキサー中で十分攪拌
混合した後、熱ロールミルで溶融混練し、室温まで冷却
し、ハンマーミルを用いて粗粉砕し、次いで、エアージ
ェットミルにて微粉砕する。得られた微粉末を分級し粒
径５〜25μｍのトナーを得た。Example 1 Styrene-based resin (D-125 Esso) 85 parts by weight Carbon black (# 44 manufactured by Mitsubishi Carbon Co.) 10 parts by weight Chromium-containing monoazo dye 5 parts by weight The mixture having the above composition was sufficiently stirred and mixed in a Henschel mixer. Thereafter, the mixture is melt-kneaded by a hot roll mill, cooled to room temperature, coarsely pulverized by using a hammer mill, and then finely pulverized by an air jet mill. The resulting fine powder was classified to obtain a toner having a particle size of 5 to 25 μm.
次に、下記組成物をボールミルを用いて室温にて10時
間分散溶解して塗布液として、スポンジ状材質のトナー
供給部材を浸漬し、120℃以下で完全に溶媒を蒸発させ
た。Next, the following composition was dispersed and dissolved at room temperature for 10 hours using a ball mill, and as a coating liquid, a sponge-like toner supply member was immersed, and the solvent was completely evaporated at 120 ° C. or lower.
例示化合物１ 1.5g 溶媒 300g 第１図に示すように、本トナー供給部材４をトナー搬
送部材２及びトナー層厚規制部材３からなる現像装置に
配設した。この現像装置を用いた現像方法について説明
すると、第１図に示すように、トナータンク７に内蔵さ
れているトナー６は攪拌羽根５によりトナー供給部材４
に強制的に寄せられ、トナーはトナー供給部材４に供給
される。そして、トナー供給部材４に取り込まれたトナ
ーはトナー供給部材が矢印方向に回転することにより、
トナー搬送部材２に運ばれ、摩擦され、静電的あるいは
物理的に吸着し、トナー搬送部材２が矢印方向に強く回
転し、トナー層厚規制部材３によって均一なトナー薄層
が形成されるとともに摩擦帯電する。その後トナー搬送
部材２と接触もしくは近接している潜像担持体１の表面
に運ばれ潜像が現像される。Exemplified Compound 1 1.5 g Solvent 300 g As shown in FIG. 1, the toner supply member 4 was provided in a developing device including the toner conveying member 2 and the toner layer thickness regulating member 3. A developing method using this developing device will be described. As shown in FIG. 1, a toner 6 contained in a toner tank 7 is supplied to a toner supply member 4 by a stirring blade 5.
, And the toner is supplied to the toner supply member 4. Then, the toner taken into the toner supply member 4 is rotated by the rotation of the toner supply member in the direction of the arrow.
The toner is conveyed to the toner conveying member 2 and is rubbed, electrostatically or physically adsorbed, the toner conveying member 2 is strongly rotated in the direction of the arrow, and a uniform thin toner layer is formed by the toner layer thickness regulating member 3. Tribocharges. Thereafter, the latent image is conveyed to the surface of the latent image carrier 1 which is in contact with or in proximity to the toner conveying member 2, and the latent image is developed.
本実施例では、前記トナーを本現像装置に補給し、ト
ナー搬送部材に＋200Vトナー供給部材へ＋100Vのバイア
スを印加し、プラス潜像を有する感光体に現像させ、転
写・定着工程をへて画像出しを行なったところ、鮮明な
画像を得た。続けて、50000枚連続複写したところ初期
と変わりのない鮮明な画像が得られた。また、トナー搬
送部材上のトナーの比電荷量（Q/M）を、出口側にフィ
ルターを具備したファラデーケージ（図示せず）を介
し、トナー搬送部材上のトナーを吸引しファラデーケー
ジ内にトラップされたトナーの比電荷を測定する吸引式
比電荷量測定装置を用いて、測定したところ、−11.5
（μC/g）と十分な比電荷量であり、50000枚連続複写後
のQ/Mは−10.8（μC/g）と初期とほとんど変わらなかっ
た。またさらに、35℃・90％RHの高温高湿下、及び10℃
・15％RHの低温低湿環境下でも常温常湿の時と同等の画
像品質が得られた。In the present embodiment, the toner is supplied to the developing device, a bias of +100 V is applied to the toner supply member, and a toner having a positive latent image is developed. As a result, a clear image was obtained. Subsequently, when 50,000 sheets were continuously copied, a clear image unchanged from the initial one was obtained. Further, the specific charge amount (Q / M) of the toner on the toner conveying member is trapped in the Faraday cage by sucking the toner on the toner conveying member through a Faraday cage (not shown) having a filter on the outlet side. When measured using a suction-type specific charge amount measuring device for measuring the specific charge of the toner obtained, -11.5
(ΜC / g), which is a sufficient specific charge amount, and the Q / M after continuous copying of 50,000 sheets was −10.8 (μC / g), which was almost the same as the initial value. Furthermore, under high temperature and high humidity of 35 ° C / 90% RH, and 10 ° C
・ Equivalent image quality to that at normal temperature and normal humidity was obtained even in a low temperature and low humidity environment of 15% RH.
なお、前記塗布液を金属板表面にコートしたものとト
ナーとの摩擦帯電性を上記のようなトナー吸引式比電荷
量測定装置を応用して、その帯電極性を調べたところ、
前記塗布液を金属板表面にコートしたものは、正極性に
帯電した。The friction polarity between the coating solution coated on the metal plate surface and the toner was measured by applying the toner suction type specific charge amount measuring apparatus as described above to the charging polarity.
When the coating solution was coated on the surface of a metal plate, it was charged to a positive polarity.
実施例２ スチレン−アクリル系樹脂 （SBM-73三洋化成製） 80重量部 カーボンブラック （＃44三菱カーボン社製） 10重量部 低分子量ポリプロピレン ５重量部 ジ・ターシャリーブチルサリチル酸亜鉛塩 ５重量部 上記組成の混合物を実施例１と同様な方法にてトナー
とした。本トナー100重量部に対し、コロイダルシリカ
（日本アエロジル社製R-972）0.1重量部を添加した。Example 2 Styrene-acrylic resin (SBM-73 manufactured by Sanyo Chemical) 80 parts by weight Carbon black (# 44 manufactured by Mitsubishi Carbon Co.) 10 parts by weight Low molecular weight polypropylene 5 parts by weight Zinc tert-butylsalicylate 5 parts by weight The mixture having the composition was used as a toner in the same manner as in Example 1. 0.1 part by weight of colloidal silica (R-972 manufactured by Nippon Aerosil Co., Ltd.) was added to 100 parts by weight of the toner.
次に下記組成物をボールミルを用いて室温にて10時間
分散溶解して塗布液として、スポンジ状材質のトナー供
給部材を浸漬し、120℃下で完全に溶媒を蒸発させた。Next, the following composition was dispersed and dissolved at room temperature for 10 hours using a ball mill, and as a coating liquid, a sponge-like toner supply member was immersed, and the solvent was completely evaporated at 120 ° C.
例示化合物２ 1.5g 溶媒 300g 本トナー供給部材４を実施例１と同様に現像装置に配
設した。前記トナーを本現像装置に補給し、トナー搬送
部材に＋300Vトナー供給部材へ＋200Vのバイアスを印加
し、実施例１と同様に現像させ、画像出しを行なったと
ころ鮮明な画像が得られた。続けて、50000枚連続複写
したところ初期と変わりのない鮮明な画像が得られた。
また、トナー搬送部材上のトナーの比電荷量（Q/M）
は、初期−12.4（μC/g）と十分であり、50000枚連続複
写後のQ/Mは−12.0（μC/g）と初期とほとんど変わらな
かった。またさらに、35℃・90％RHの高温高湿下、及び
10℃・15％RHの低温低湿環境下でも常温常湿の時と同等
の画像品質が得られた。Exemplified Compound 2 1.5 g Solvent 300 g The toner supply member 4 was provided in a developing device in the same manner as in Example 1. The toner was replenished to the developing device, a +300 V bias was applied to the toner conveying member, and a +200 V bias was applied to the toner supplying member. The toner was developed in the same manner as in Example 1, and a clear image was obtained. Subsequently, when 50,000 sheets were continuously copied, a clear image unchanged from the initial one was obtained.
Also, the specific charge of the toner on the toner conveying member (Q / M)
The initial value was -12.4 (μC / g), which was sufficient, and the Q / M after continuous copying of 50,000 sheets was −12.0 (μC / g), which was almost the same as the initial value. Furthermore, under high temperature and high humidity of 35 ° C and 90% RH, and
Image quality equivalent to that at room temperature and normal humidity was obtained even in a low temperature and low humidity environment of 10 ° C. and 15% RH.
なお、前記塗布液を金属板表面にコートしたものとト
ナーとの摩擦帯電性を上記のようなトナー吸引式比電荷
測定装置を応用して、その帯電極性を調べたところ、前
記塗布液を金属板表面にコートしたものは、正極性に帯
電した。The triboelectric charging property between the coating liquid coated on the surface of the metal plate and the toner was measured using a toner suction type specific charge measuring device as described above, and the charging polarity was examined. Those coated on the plate surface were charged to positive polarity.
実施例３ スチレン−２エチルヘキシルアクリレート−ｎブチルメ
タアクリレート系樹脂 80重量部 カーボンブラック （＃44三菱カーボン社製） 10重量部 低分子量ポリプロピレン ５重量部 ジ・ターシャリーブチルサリチル酸亜鉛塩 ５重量部 上記組成の混合物を実施例１と同様な方法にてトナー
とした。本トナー100重量部に対し、コロイダルシリカ
（日本アエロジル社製R-972）0.1重量部を添加した。Example 3 Styrene-2-ethylhexyl acrylate-n-butyl methacrylate resin 80 parts by weight Carbon black (# 44 manufactured by Mitsubishi Carbon Corporation) 10 parts by weight Low molecular weight polypropylene 5 parts by weight Zinc tert-butylsalicylate 5 parts by weight The above composition Was used as a toner in the same manner as in Example 1. 0.1 part by weight of colloidal silica (R-972 manufactured by Nippon Aerosil Co., Ltd.) was added to 100 parts by weight of the toner.
次に、下記組成物をボールミルを用いて室温にて10時
間分散溶解して塗布液として、スポンジ状材質のトナー
供給部材を浸漬し、120℃下で完全に溶媒を蒸発させ
た。Next, the following composition was dispersed and dissolved at room temperature for 10 hours using a ball mill, and as a coating liquid, a sponge-like toner supply member was immersed, and the solvent was completely evaporated at 120 ° C.
例示化合物３ 1.0g 溶媒 300g 本トナー供給部材４を実施例１と同様に現像装置に配
設した。前記トナーを本現像装置に補給し、トナー搬送
部材に＋450Vトナー供給部材へ＋100Vのバイアスを印加
し、実施例１と同様に現像させ、画像出しを行なったと
ころ、鮮明な画像が得られた。続けて、50000枚連続複
写したところ初期と変わりのない鮮明な画像が得られ
た。また、トナー搬送部材上のトナーの比電荷量（Q/
M）は、初期−10.8（μC/g）と十分であり、50000枚連
続複写後のQ/Mは−10.1（μC/g）と初期とほとんど変わ
らなかった。またさらに、35℃・90％RHの高温高湿下、
及び10℃・15％RHの低温低湿環境下でも常温常湿の時と
同等の画像品質が得られた。Exemplified Compound 3 1.0 g Solvent 300 g The toner supply member 4 was provided in a developing device in the same manner as in Example 1. The toner was replenished to the developing device, a +450 V bias was applied to the toner supply member, and a +100 V bias was applied to the toner supply member. The image was developed and imaged in the same manner as in Example 1. As a result, a clear image was obtained. Subsequently, when 50,000 sheets were continuously copied, a clear image unchanged from the initial one was obtained. In addition, the specific charge (Q /
M) was sufficient at the initial stage of −10.8 (μC / g), and the Q / M after continuous copying of 50,000 sheets was −10.1 (μC / g), which was almost the same as the initial stage. Furthermore, under high temperature and high humidity of 35 ° C and 90% RH,
Even under a low temperature and low humidity environment of 10 ° C. and 15% RH, image quality equivalent to that at normal temperature and normal humidity was obtained.
なお、前記塗布液を金属板表面にコートしたものとト
ナーとの摩擦帯電性を上記のようなトナー吸引式比電荷
量測定装置を応用して、その帯電極性を調べたところ、
前記塗布液を金属板表面にコートしたものは、正極性に
帯電した。The friction polarity between the coating solution coated on the metal plate surface and the toner was measured by applying the toner suction type specific charge amount measuring apparatus as described above to the charging polarity.
When the coating solution was coated on the surface of a metal plate, it was charged to a positive polarity.
比較例１ 実施例１の例示化合物１をトナー供給部材４の被覆材
として使用しない以外は実施例１と同様な装置及びトナ
ーで画像出しを行なったところ、初期から連続複写1000
0枚までは鮮明な画像が得られていたが、20000枚後には
画像濃度が低下しはじめ、50000枚後ではさらに画像濃
度が低下し残像等も発生し、トナー搬送部材上には均一
なトナー薄層が形成されていなかった。Comparative Example 1 An image was formed using the same apparatus and toner as in Example 1 except that Exemplified Compound 1 of Example 1 was not used as a coating material for the toner supply member 4.
A clear image was obtained up to 0 sheets, but after 20,000 sheets the image density began to decrease, after 50,000 sheets the image density further decreased and afterimages etc. occurred, and a uniform toner No thin layer was formed.
また、実施例１と同様にトナー搬送部材上のトナーの
Q/Mを測定したところ、初期は−11.4（μC/g）、20000
枚後で−5.0（μC/g）、50000枚後では−1.7（μC/g）
であった。Further, similarly to the first embodiment, the toner
When Q / M was measured, the initial value was -11.4 (μC / g) and 20000
-5.0 (μC / g) after 50,000 sheets, -1.7 (μC / g) after 50,000 sheets
Met.
比較例２ 実施例１の例示化合物１の代わりに実施例２のトナー
に用いたサリチル酸亜鉛塩をトナー供給部材４の被覆材
として使用した以外は実施例１と同様な装置及びトナー
で画像出しを行なったところ、初期から連続複写1000枚
までは鮮明な画像が得られていたが、2000枚後には画像
濃度が低下しはじめ、3000枚後ではさらに画像濃度が低
下し残像等も発生し、トナー搬送部材上には均一なトナ
ー薄層が形成されていなかった。Comparative Example 2 An image was formed using the same apparatus and toner as in Example 1 except that the zinc salicylate used in the toner of Example 2 was used as the coating material of the toner supply member 4 instead of the exemplified compound 1 of Example 1. When the test was performed, clear images were obtained from the initial stage up to 1000 continuous copies.However, after 2,000 copies, the image density began to decrease, and after 3,000 copies, the image density further decreased, resulting in afterimages and the like. No uniform thin toner layer was formed on the conveying member.
また、実施例１と同様にトナー搬送部材上のトナーの
Q/Mを測定したところ、初期は−10.2（μC/g）、2000枚
後で−3.2（μC/g）、3000枚後では−0.3（μC/g）であ
った。Further, similarly to the first embodiment, the toner
When Q / M was measured, it was -10.2 (μC / g) at the beginning, −3.2 (μC / g) after 2,000 sheets, and −0.3 (μC / g) after 3,000 sheets.
比較例３ 実施例１と同様な装置及びトナーを用い、トナー搬送
部材に＋200V、トナー供給部材に＋300Vのバイアスを印
加して、同様な画像出しを行なったところ、初期から連
続複写10000枚までは鮮明な画像が得られていたが、200
00枚後には画像濃度が低下しはじめ、50000枚後ではさ
らに画像濃度が低下し残像等も発生し、トナー搬送部材
上には均一なトナー薄層が形成されておらず、トナー層
厚規制部材及びトナー搬送部材上にはトナーフィルミン
グが発生していた。Comparative Example 3 Using the same apparatus and toner as in Example 1, applying a bias of +200 V to the toner conveying member and applying a bias of +300 V to the toner supplying member, and performing similar image output. A clear image was obtained, but 200
After 00 sheets, the image density began to decrease, and after 50,000 sheets, the image density further decreased and afterimages and the like also occurred, and a uniform thin toner layer was not formed on the toner conveying member. Also, toner filming has occurred on the toner conveying member.
また、実施例１と同様にトナー搬送部材上のトナーの
Q/Mを測定したところ、初期は−11.1（μC/g）、20000
枚後で−4.8（μC/g）、50000枚後では−1.3（μC/g）
であった。Further, similarly to the first embodiment, the toner
When Q / M was measured, the initial value was -11.1 (μC / g) and 20000
-4.8 (μC / g) after 50,000 sheets, -1.3 (μC / g) after 50,000 sheets
Met.
［発明の効果］ 本発明の一成分現像装置においては、トナーの供給部
材の表面に本発明の樹脂を被覆させているので、トナー
の融着防止、およびトナーとの摩擦帯電の経時環境安定
性が良くなり、トナー搬送部材へのトナー補給性を良好
に保つことが可能となる。従って、本発明の一成分現像
装置によれば連続複写後も初期と同等の画像品質が得ら
れる。[Effects of the Invention] In the one-component developing apparatus of the present invention, since the surface of the toner supply member is coated with the resin of the present invention, prevention of fusion of the toner and environmental stability over time of triboelectric charging with the toner. And the toner replenishing property to the toner conveying member can be kept good. Therefore, according to the one-component developing apparatus of the present invention, the same image quality as the initial image can be obtained even after continuous copying.
第１図は本発明の実施例で使用した現像装置の概略図で
ある。 １……静電潜像担持体、２……トナー搬送部材、３……
トナ層厚規制部材、４……トナー供給部材、５……攪拌
羽根、６……トナー、７……トナータンクFIG. 1 is a schematic view of a developing device used in an embodiment of the present invention. 1 .... Electrostatic latent image carrier, 2 .... Toner conveying member, 3 ....
Toner layer thickness regulating member, 4: toner supply member, 5: stirring blade, 6: toner, 7: toner tank
───────────────────────────────────────────────────── フロントページの続き (72)発明者 望月 千春 東京都大田区中馬込１丁目３番６号 株 式会社リコー内 (56)参考文献 特開 昭62−215964（ＪＰ，Ａ) 特開 昭63−178257（ＪＰ，Ａ) 特開 昭63−282751（ＪＰ，Ａ) 特開 平１−101375（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Chiharu Mochizuki 1-3-6 Nakamagome, Ota-ku, Tokyo Inside Ricoh Co., Ltd. (56) References JP-A-62-215964 (JP, A) 63-178257 (JP, A) JP-A-63-282751 (JP, A) JP-A-1-101375 (JP, A)
Claims (3)
規制部材と、トナー搬送部材に接触しつつ自在に回転可
能に支持されたトナーを前記搬送部材上に供給するトナ
ー供給部材とを有する現像装置において、少なくとも前
記トナー供給部材の表面がアミノ基を含むシランカップ
リング剤で被覆処理されてなることを特徴とする負帯電
性トナー現像装置。A developing device having at least a toner conveying member, a toner layer thickness regulating member, and a toner supply member for supplying the toner rotatably supported on the conveying member while being in contact with the toner conveying member; , Wherein at least the surface of the toner supply member is coated with a silane coupling agent containing an amino group.
記一般式で示される化合物である特許請求の範囲第１項
記載の現像装置。 （但し、R1,R2：同一または異なる炭素数１〜３ のアルキル基 X:フェニル基または-(CH2)n-NH2 （n:1〜３の整数） l:1〜５の整数 m:2または３2. The developing device according to claim 1, wherein the silane coupling agent containing an amino group is a compound represented by the following general formula. (However, R 1 , R 2 : the same or different alkyl groups having 1 to 3 carbon atoms X: phenyl group or — (CH 2 ) n —NH 2 (n: an integer of 1 to 3) l: an integer of 1 to 5 m: 2 or 3
よりも０〜500V負電位のバイアスが印加された特許請求
の範囲第１項記載の現像装置。3. The developing device according to claim 1, wherein a bias having a negative potential of 0 to 500 V is applied to said toner supply member as compared with said toner transport member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29423188A JP2761740B2 (en) | 1988-11-21 | 1988-11-21 | Developing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29423188A JP2761740B2 (en) | 1988-11-21 | 1988-11-21 | Developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02140772A JPH02140772A (en) | 1990-05-30 |
| JP2761740B2 true JP2761740B2 (en) | 1998-06-04 |
Family
ID=17805040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29423188A Expired - Fee Related JP2761740B2 (en) | 1988-11-21 | 1988-11-21 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2761740B2 (en) |
-
1988
- 1988-11-21 JP JP29423188A patent/JP2761740B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02140772A (en) | 1990-05-30 |
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