JPH05123623A - Oil applying roller - Google Patents

Abstract

PURPOSE:To obtain the oil applying roller which is improved in heat resistance and cushion property and is usable at a high temp. as well by winding 1st heat resistant fibers, closed cellular silicone rubber and 2nd heat resistant fibers around an aluminum pipe in which a silicone oil is sealed. CONSTITUTION:A release agent (silicone oil) 2 is sealed into the aluminum pipe 1 and small holes 1a are bored on the surface of the pipe 1. The 1st heat resistant fibers 3, such as 'Aramid(R)' fibers, are wound around the pipe so as to close the small holes 1a by a double-coated adhesive tape. Holes 3a are provided on a sheet 3 as well in the separate positions off the positions closing the small holes 1a. An elastic layer 4 consisting preferably of the closed cellular silicone rubber is formed on the sheet 3 and scores 5 are formed in the positions corresponding to the small holes 1a. The 2nd heat resistant fibers 6, such as felt, are wound around the silicone rubber 4. The silicone oil 2 bleeding out of the small holes 1a of the aluminum pipe 1 bleeds to the felt 2. The oil is thus applied on the mating roller.

Description

【発明の詳細な説明】Detailed Description of the Invention

【産業上の利用分野】本発明は複写機、ファクシミリ等
の電子写真装置等における定着ロ−ラ等にトナ−オフセ
ットを防止するためのオイルを供給するオイル塗布ロ−
ラに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil coating roller for supplying oil for preventing toner offset to a fixing roller or the like in an electrophotographic apparatus such as a copying machine or a facsimile.
Regarding LA

【従来の技術】一般に電子写真装置等における定着装置
は、第４図に示すように転写工程で表面にトナ−Ｔを転
写された複写紙Ｃはその後定着工程に搬送されると、定
着ロ−ラ２２とこれに圧接している加圧ロ−ラ２３との
間を通紙し、熱と圧力によって複写紙Ｃに画像を定着す
るという方式が採用されている。しかしこの方式では定
着ロ−ラ２２や加圧ロ−ラ２３の表面に未定着トナ−Ｔ
が残留するため、ロ−ラやブレ−ド等のクリ−ニング機
構２４を設けたり、オイル塗布ロ−ラ２１を設けたりし
ている。このうち、オイル塗布ロ−ラ２１はトナ−Ｔと
接触するロ−ラに直接離型剤（例えばシリコ−ンオイ
ル）としてのオイルを塗布するもので、トナ−オフセッ
トを防止したり、トナ−の離型性を良くしたり、或は紙
の通りをよくするために用いられている。このオイル塗
布ロ−ラは、従来第３図に示すように離型剤としてのシ
リコ−ンオイル１２を封入したアルミパイプ１１に複数
の穴１１ａを開け、そのアルミパイプ１１に紙１３を巻
いて貼着し、その上にフェルト１４を巻いた構造であ
る。そしてシリコ−ンオイル１２は穴１１ａを介してア
ルミパイプ１１の外側の紙１３、フェルト１４へ毛細管
現象により浸透するようになっていて定量のオイルがフ
ェルト表面ににじみ出ることにより相手ロ−ラにオイル
を塗布して上記の効果をあげていた。2. Description of the Related Art Generally, in a fixing device in an electrophotographic apparatus or the like, as shown in FIG. 4, when a copy paper C having a toner T transferred on its surface in a transfer process is conveyed to the fixing process thereafter, it is fixed in a fixing roll. A system is used in which the paper is passed between the roller 22 and the pressure roller 23 that is in pressure contact with the roller 22, and the image is fixed on the copy paper C by heat and pressure. However, in this method, the unfixed toner T is not formed on the surface of the fixing roller 22 and the pressure roller 23.
Therefore, a cleaning mechanism 24 such as a roller or blade is provided, or an oil application roller 21 is provided. Of these, the oil application roller 21 is for directly applying oil as a release agent (for example, silicone oil) to the roller that comes into contact with the toner T, to prevent toner offset or toner. It is used to improve releasability and improve paper passage. As shown in FIG. 3, a conventional oil coating roller has a plurality of holes 11a formed in an aluminum pipe 11 in which silicone oil 12 as a releasing agent is sealed, and paper 13 is wound around the aluminum pipe 11 to be stuck. It has a structure in which the felt 14 is worn and wound on the felt 14. The silicone oil 12 penetrates through the hole 11a into the paper 13 and the felt 14 on the outer side of the aluminum pipe 11 by a capillarity phenomenon. It was applied to obtain the above effect.

【発明が解決しようとする課題】しかし従来のオイル塗
布ロ−ラは、穴の開いたパイプ１１に単に紙１３とフェ
ルト１４を巻回させただけなのでオイルが過剰となり易
くオイルの安定供給に欠けていた。また紙を間に挟むだ
けの構造なのでクッション性に欠けると共に熱に弱い欠
点があるため、高熱の加わる部分のロ−ラには使用出来
なかった。本発明は上記従来のオイル塗布ロ−ラの欠点
に鑑みてなされたものであり、その目的とするところは
未使用時にはオイルの供給を出来るだけ少なくし、使用
時にはオイルの安定供給を可能とすると共に、耐熱性繊
維を使用することによりクッション性と耐熱性を向上さ
せて２００度前後の高温度上でも使用できるオイル塗布
ロ−ラであって、しかもオイル塗布機能だけではなくク
リ−ニング機能も向上させることにより、オイル塗布ロ
−ラとしてだけではなくクリ−ニングロ−ラとしても使
用出来るオイル塗布ロ−ラを提供することを目的とする
ものである。However, in the conventional oil coating roller, since the paper 13 and the felt 14 are simply wound around the perforated pipe 11, the oil is likely to be excessive and a stable oil supply is lacking. Was there. In addition, since it has a structure in which the paper is only sandwiched, it lacks cushioning properties and is weak against heat, so it could not be used for a roller where high heat is applied. The present invention has been made in view of the drawbacks of the conventional oil coating roller described above, and an object of the present invention is to reduce the supply of oil as much as possible when not in use and to enable stable supply of oil during use. At the same time, it is an oil application roller that can be used even at high temperatures around 200 degrees by improving the cushioning property and heat resistance by using heat resistant fibers, and also has a cleaning function as well as an oil application function. It is an object of the present invention to provide an oil application roller which can be used not only as an oil application roller but also as a cleaning roller by improving the oil application roller.

【課題を解決するための手段】上記の目的を達成するた
め、本発明におけるオイル塗布ロ−ラは、内部に離型剤
を封入しその周囲に長手方向に連続して小孔を形成した
中空円筒状の芯金と、その芯金の小孔をふさぐように貼
着した第１の耐熱性繊維と、その第１の耐熱性繊維上に
形成され前記芯金の小孔に対応する位置に切れ目を設け
た弾性層と、その弾性層上に巻着し、表面に前記芯金内
の離型剤がにじみ出るようにした第２の耐熱性繊維とを
備えたものである。また上記弾性層は独立気泡のシリコ
−ンゴムとし、発泡させた後研磨することが望ましい。In order to achieve the above object, an oil coating roller according to the present invention is a hollow structure in which a mold release agent is enclosed and a small hole is continuously formed around the mold release agent in the longitudinal direction. A cylindrical core metal, a first heat resistant fiber adhered so as to close the small hole of the core metal, and a position formed on the first heat resistant fiber and corresponding to the small hole of the core metal. The elastic layer is provided with a slit, and the second heat resistant fiber is wound around the elastic layer so that the release agent in the core bar oozes out on the surface. Further, it is desirable that the elastic layer is made of closed-cell silicone rubber, and is foamed and then polished.

【作用】このオイル塗布ロ−ラは従来のオイル塗布ロ−
ラと同様、定着ロ−ラ及び／又は加圧ロ−ラに圧接させ
る。そしてアルミパイプ内のシリコ−ンオイルが小孔か
らにじみ出て第１の第１の耐熱性繊維、切れ目を設けた
弾性層、第２の耐熱性繊維を介し相手ロ−ラにオイルを
塗布する。また２つの耐熱性繊維や弾性層を用いている
ため熱に強く、クッション性が増したのでクリ−ニング
ロ−ラとしても使用可能である。Operation: This oil application roller is a conventional oil application roller.
Like the roller, it is pressed against the fixing roller and / or the pressure roller. Then, the silicone oil in the aluminum pipe oozes out from the small holes, and the oil is applied to the partner roller through the first first heat resistant fiber, the cut elastic layer, and the second heat resistant fiber. Further, since it uses two heat resistant fibers and an elastic layer, it is resistant to heat and has increased cushioning properties, so it can be used as a cleaning roller.

【実施例】以下、本発明のオイル塗布ロ−ラの実施例を
図面に基づいて説明する。第１図は本発明のオイル塗布
ロ−ラの縦断断面図、第２図は製造時の一部斜視図であ
る。これらの図において符号１は中空円筒状の芯金で、
通常は中空のアルミパイプを用いる。このアルミパイプ
の内部には離型剤（シリコ−ンオイル）２を封入してい
る。またパイプ１の表面にはその長手方向に沿って１２
０°づつずれた３列の位置に螺旋状に小孔１ａが穿設さ
れている。３はそのアルミパイプの小孔１ａをふさぐよ
うに両面テ−プで巻き付けたアラミド繊維等の第１の耐
熱性繊維で、例えば「ポリ−ｍ−フェニレンイソフタル
アミド、商品名は米国デュポン社のＮｏｍｅｘ（登録商
標）」のシ−トとする。このアルミパイプの小孔１ａを
ふさぐのは、後述のゴムを発泡させたときそのゴムがパ
イプ内面に入るのを防止するためである。またこのシ−
ト３にも前記小孔１ａをふさぐ位置とはずれた別の位置
に、アルミパイプと後述のゴムとの接着を良くするため
穴３ａを設けるものとする。４は前記シ−ト３上に形成
される弾性層で、好ましくは独立気泡のシリコ−ンゴム
とする。このシリコ−ンゴム４はアルミパイプ上に設け
た後、発泡させてその表面を研磨し、その後アルミパイ
プ１の小孔１ａに対応する位置に切れ目５を形成する。
独立気泡のシリコ−ンゴム４を用いるのは、アルミパイ
プ内部のオイルがゴム４までにじみ出で浸漬するとこの
ゴム４は膨潤する性質があるため、ロ−ラの未使用時は
オイルの流出が制限され、ロ−ラの回転使用時のみ切れ
目がゆがんでオイルが流出する構造になるからである。
また同様に独立気泡のシリコ−ン発泡ゴムを使えば、側
面からシリコ−ンオイルが漏れない、放熱を防ぐ利点も
ある。６はシリコ−ンゴム４上に巻着し、接着剤で貼着
する最上層の第２の耐熱性繊維で、前記第１の耐熱性繊
維３と略同様の材質とするが前記のシ−ト状とは異な
り、相手ロ−ラにオイルを塗布したりクリニ−ングした
りするために厚みを持ったフェルト状のものとする。尚
前記シリコ−ンオイル２は従来のオイル塗布ロ−ラと同
様に、アルミパイプ１の中にフェルト６を巻く前に入れ
ておく。そしてアルミパイプ１の小孔１ａからにじみ出
るシリコ−ンオイル２は、シ−ト３、シリコ−ンゴム４
の切れ目５を介して当該フェルト６ににじみ出て相手ロ
−ラにオイルを塗布したりクリニ−ングしたりするもの
である。尚図中、７はフランジである。Embodiments of the oil coating roller of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of an oil application roller of the present invention, and FIG. 2 is a partial perspective view during manufacturing. In these figures, reference numeral 1 is a hollow cylindrical core metal,
Normally, a hollow aluminum pipe is used. A mold release agent (silicone oil) 2 is enclosed inside the aluminum pipe. In addition, the surface of the pipe 1 has a length of 12
Small holes 1a are spirally formed at positions of three rows offset by 0 °. Reference numeral 3 denotes a first heat resistant fiber such as aramid fiber wound with a double-sided tape so as to cover the small hole 1a of the aluminum pipe. For example, "poly-m-phenylene isophthalamide, trade name: Nomex of DuPont, USA (Registered trademark) ”. The reason why the small hole 1a of the aluminum pipe is closed is to prevent the rubber from entering the inner surface of the pipe when the rubber described later is foamed. Also this sea
The hole 3a is also provided in the girth 3 at a position different from the position where the small hole 1a is closed so as to improve the adhesion between the aluminum pipe and the rubber described later. An elastic layer 4 formed on the sheet 3 is preferably a closed-cell silicone rubber. After the silicone rubber 4 is provided on the aluminum pipe, it is foamed and the surface thereof is polished, and then a cut 5 is formed at a position corresponding to the small hole 1a of the aluminum pipe 1.
The closed-cell silicone rubber 4 is used because the oil inside the aluminum pipe swells when the oil 4 oozes into the rubber 4 and swells. Therefore, the outflow of oil is restricted when the roller is not used. This is because the breakage is distorted and the oil flows out only when the roller is used for rotation.
Similarly, the use of closed-cell silicone foam rubber has the advantage of preventing silicone oil from leaking from the side surface and preventing heat radiation. Reference numeral 6 is a second heat-resistant fiber of the uppermost layer which is wound around the silicone rubber 4 and attached with an adhesive, and is made of a material substantially similar to that of the first heat-resistant fiber 3, but the sheet described above. Unlike the shape, it is a felt-like one with a thickness for applying oil to the partner roller and for cleaning. The silicone oil 2 is put in the aluminum pipe 1 before the felt 6 is wound, as in the conventional oil application roller. The silicone oil 2 exuding from the small hole 1a of the aluminum pipe 1 is a sheet 3 and a silicone rubber 4
The felt 6 oozes out through the cut 5 to apply oil or clean the partner roller. In the figure, 7 is a flange.

【発明の効果】以上のように、本発明によれば第１・第
２の耐熱性繊維と弾性層を用いているので、耐熱性とク
ッション性が向上し、オイル塗布機能だけではなくクリ
−ニング機能も向上させることにより、オイル塗布ロ−
ラとしては勿論、クリ−ニングロ−ラとしても使用出来
る。特に紙を用いた従来品に比べ、シリコ−ン発泡ゴム
とノ−メックスペ−パ及びノ−メックスフェルトを使用
すれば２００度前後の耐熱性にすぐれた効果が得られ
る。また弾性層に切れ目を設けたので、アルミパイプの
穴の大きさに関係なくその切れ目でオイル量を調整でき
るのでオイルの安定供給ができる。特に独立気泡のシリ
コ−ンゴムを用いるとセル中にオイルを保持できる。ク
リ−ナ対象物に柔らかく接するためニップ幅が取れる等
の効果を奏する。As described above, according to the present invention, since the first and second heat resistant fibers and the elastic layer are used, the heat resistance and the cushioning property are improved, and not only the oil application function but also the clear property is improved. By improving the training function, the oil application roll
Of course, it can be used as a cleaning roller. In particular, when silicone foamed rubber and Nomex paper and Nomex felt are used, compared to the conventional products using paper, an excellent heat resistance of about 200 degrees can be obtained. Further, since the elastic layer is provided with the cut, the oil amount can be adjusted at the cut regardless of the size of the hole of the aluminum pipe, so that the oil can be stably supplied. In particular, if the closed-cell silicone rubber is used, the oil can be retained in the cell. Since it is in soft contact with the cleaner object, the nip width can be obtained.

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

【第１図】本発明のオイル塗布ロ−ラの縦断断面図であ
る。FIG. 1 is a vertical sectional view of an oil application roller of the present invention.

【第２図】製造時の一部斜視図である。FIG. 2 is a partial perspective view at the time of manufacturing.

【第３図】従来のオイル塗布ロ−ラの縦断断面図であ
る。FIG. 3 is a vertical sectional view of a conventional oil application roller.

【第４図】従来のオイル塗布ロ−ラの使用状態図であ
る。FIG. 4 is a view showing a conventional oil applying roller in use.

【符号の説明】[Explanation of symbols]

１ 中空円筒状の芯金 １ａ小孔 ２ 離型剤 ３ 第１の耐熱性繊維 ４ 弾性層 ５ 切れ目 ６ 第２の耐熱性繊維 DESCRIPTION OF SYMBOLS 1 Hollow cylindrical core 1a Small hole 2 Release agent 3 First heat resistant fiber 4 Elastic layer 5 Break 6 Second heat resistant fiber

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】内部に離型剤を封入し、その周囲に小孔を
形成した中空円筒状の芯金と、 その芯金の小孔をふさぐように貼着した第１の耐熱性繊
維と、 その第１の耐熱性繊維上に形成され、前記芯金の小孔に
対応する位置に切れ目を設けた弾性層と、 その弾性層上に巻着し、表面に前記芯金内の離型剤がに
じみ出るようにした第２の耐熱性繊維と、からなること
を特徴とするオイル塗布ロ−ラ。1. A hollow cylindrical core metal having a mold release agent enclosed therein and small holes formed around the mold release agent, and a first heat resistant fiber adhered so as to close the small holes of the core metal. An elastic layer formed on the first heat-resistant fiber and having a cut at a position corresponding to the small hole of the core metal, and winding on the elastic layer, and a mold release in the core metal on the surface An oil-applied roller comprising a second heat-resistant fiber adapted to allow the agent to ooze out. 【請求項２】弾性層を独立気泡のシリコ−ンゴムとし、
発泡させた後研磨することを特徴とする請求項１記載の
オイル塗布ロ−ラ。2. The elastic layer is made of closed-cell silicone rubber,
The oil application roller according to claim 1, wherein the oil application roller is foamed and then polished.