JPS60249177A - Photosensitive drum for electrophotographic copying machine - Google Patents

Photosensitive drum for electrophotographic copying machine

Info

Publication number
JPS60249177A
JPS60249177A JP59106264A JP10626484A JPS60249177A JP S60249177 A JPS60249177 A JP S60249177A JP 59106264 A JP59106264 A JP 59106264A JP 10626484 A JP10626484 A JP 10626484A JP S60249177 A JPS60249177 A JP S60249177A
Authority
JP
Japan
Prior art keywords
ring body
photosensitive drum
drum
wheel body
cylinder
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.)
Granted
Application number
JP59106264A
Other languages
Japanese (ja)
Other versions
JPH0123785B2 (en
Inventor
Yoichi Sato
洋一 佐藤
Ryo Hashimoto
涼 橋本
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.)
Altemira Co Ltd
Original Assignee
Showa Aluminum Corp
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 Showa Aluminum Corp filed Critical Showa Aluminum Corp
Priority to JP59106264A priority Critical patent/JPS60249177A/en
Publication of JPS60249177A publication Critical patent/JPS60249177A/en
Publication of JPH0123785B2 publication Critical patent/JPH0123785B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/75—Details relating to xerographic drum, band or plate, e.g. replacing, testing
    • G03G15/751—Details relating to xerographic drum, band or plate, e.g. replacing, testing relating to drum

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)

Abstract

PURPOSE:To facilitate an operation for attaching and detaching a photosensitive drum to and from a drum shaft and to improve rotating accuracy and heat radiating performance by positioning an inside bearing cylinder of an inside wheel body to the central part of an outside wheel body in the position concentrical therewith, lancing the outside edges of the radiating fins of the inside wheel body and forming strain-curving tongue pieces for forming turbulence thereto. CONSTITUTION:The photosensitive drum is provided concentrically with the outside wheel body 1 as a drum cylinder on the surface of which a photosensitive layer is formed and the inside wheel body 1 which is inserted into said body and is integrally combined therewith. The body 2 is formed integrally with the inside bearing cylinder 3 and the plural radiating fins 4 along the axial line direction thereof by extrusion of, for example, an aluminum alloy. The outside edges of the fins 4 are lanced 5 at many points at every other prescribed intervals and the many distorted tongue pieces 4a for forming turbulence are formed thereto. The exact setting and disposition of the photosensitive drum at the center of rotation are made possible by such simple constitution. The photosensitive drum which is extremely simple to attach and detach and has extremely high heat radiating performance is thus obtd.

Description

【発明の詳細な説明】 （産業上の利用分野） この発明は電子写真法を適用した電子複写機に用いられ
る静電感光ドラム、更に詳しくは外周面に透明絶縁層を
被覆した感光層を有する導電性支持体からなるドラム状
感光体に関する。Detailed Description of the Invention (Industrial Application Field) The present invention relates to an electrostatic photosensitive drum used in an electronic copying machine applying electrophotography, and more specifically, to an electrostatic photosensitive drum having a photosensitive layer whose outer peripheral surface is coated with a transparent insulating layer. The present invention relates to a drum-shaped photoreceptor made of a conductive support.

（従来の技術） 従来、この種の感光ドラムは、外周面に感光層を形成し
たアルミニウム等の金属からなる中空のシリンダが用い
られている。そしてこれを回転支承するために、該シリ
ンダの両端に別途形成した１対のフランジ部材を当て、
これらを複数本の締結ボルトで締結して前記シリンダと
一体化するとともに、フランジ部材に取付Ｇプだボール
ベアリング等の軸受を介して、ドラム軸に着脱自在に軸
支せしめるものとなされている。(Prior Art) Conventionally, this type of photosensitive drum uses a hollow cylinder made of metal such as aluminum and having a photosensitive layer formed on its outer peripheral surface. In order to rotationally support this, a pair of separately formed flange members is applied to both ends of the cylinder,
These are integrated with the cylinder by fastening them with a plurality of fastening bolts, and are attached to a flange member and removably supported on the drum shaft via a bearing such as a ball bearing.

（従来技術の問題点） 従って、上記のような従来の感光ドラムでは、シリンダ
のほかに、これを軸支するために１対のフランジ、軸受
等を別途に必要として部品点数が増し、４１Ｉｉ造が複
雑化してコスト高につくのみならず、感光体の疲労、損
傷等によってシリンダを交換する必要を生じたような場
合に、その肌着に煩雑な手順を必要として多くの手間が
かかる欠点を有していた。(Problems with the Prior Art) Therefore, in the conventional photosensitive drum as described above, in addition to the cylinder, a pair of flanges, bearings, etc. are required to support the drum, which increases the number of parts. Not only is the process complicated and costly, but when it becomes necessary to replace the cylinder due to fatigue or damage to the photoreceptor, it has the drawback of requiring a complicated procedure and requiring a lot of effort. Was.

また、感光ドラムの回転支承においても、シリンダをこ
れとは別体であるフランジ部、軸受を介してドラム軸に
軸支するものであるため、各部材相互間での誤差の累積
によってシリンダの中心がドラム軸の中心に全長にわた
って厳密に合致しないことが起こり易く、複写機能上に
種々の悪影響を及ぼすことがあった。In addition, in the rotational support of the photosensitive drum, the cylinder is supported on the drum shaft via a separate flange and bearing, so the center of the cylinder may be distorted due to the accumulation of errors between each member. It is likely that the center of the drum does not exactly match the center of the drum shaft over its entire length, which may have various adverse effects on the copying function.

更にまた、近年、電子複写機の小型化の要請は益々強い
ものがあり、それに伴って感光ドラムも小さくなりつつ
ある。加えて、感光ドラムによって転写紙に画像を転写
したのち、該転写紙上に静電付着した顕画像の加熱定着
操作を、感光ドラムの周りで行うものとすることにより
、定着部を別に設ける場合のスペースを削減しようとす
る試みもなされている。しかるに、感光ドラムは、コロ
ナ放電器やランプによって熱せられるのに加えて、周面
に加熱定着ロールが密接配置されるような場合には、益
々その温度が上昇される傾向を示すのに対し、前記のＪ
：うな従来の感光ドラムでは、放熱性が悪いために、そ
れ自体の小型化による表面積の減少傾向とも相俟って、
ドラムに過熱現象を生じ易く、感光体の帯電性能が著し
く低下し、あるいはドラム表面でトナーが溶融して複写
紙への良好な転写を阻害するというような問題点が生じ
ている。Furthermore, in recent years, there has been an increasingly strong demand for miniaturization of electronic copying machines, and accordingly, photosensitive drums are also becoming smaller. In addition, after an image is transferred to a transfer paper by a photosensitive drum, the heating and fixing operation of the developed image electrostatically adhered to the transfer paper is performed around the photosensitive drum, which makes it easier to install a fixing section separately. Attempts have also been made to reduce space. However, when a photosensitive drum is heated by a corona discharger or a lamp and in addition a heating fixing roll is placed closely around its circumference, its temperature tends to increase. J mentioned above
：Conventional photosensitive drums have poor heat dissipation, which combined with the tendency to reduce surface area due to miniaturization.
Problems arise in that the drum tends to overheat, the charging performance of the photoreceptor is significantly reduced, or the toner melts on the drum surface, impeding good transfer to copy paper.

（発明の目的） この発明は、上記の諸問題を解消しうるような感光ドラ
ムを提供することを目的とする。即ち、ドラム軸への支
承構造を簡素化でき、着脱操作を容易になしうると共に
、回転精度、真円度の精度に優れ、かつ放熱性にも優れ
ていて、特にドラムの一端から風を送り込んで冷却を促
進する場合に、ドラムの表面温度を可及的均一なものと
なしつる製作簡易な感光ドラムを提供しようとするもの
である。(Object of the Invention) An object of the present invention is to provide a photosensitive drum that can solve the above-mentioned problems. In other words, the support structure for the drum shaft can be simplified, making it easy to attach and detach the drum, and it also has excellent rotational accuracy and roundness accuracy, as well as excellent heat dissipation. It is an object of the present invention to provide a photosensitive drum that is easy to manufacture by making the surface temperature of the drum as uniform as possible when cooling is promoted.

（問題点を解決するための手段） 上記の目的を達成するために、この発明は、先ずドラム
・シリンダを構成する外輪体内に、これと同心に軸受内
筒を一体的に設けたものとすることにより、前記内筒に
ドラム軸を挿通して簡単かつ正確にドラムの回転支承を
可能なも゛のとし、かつドラムの脱着も容易に行いうる
ちのとする。また上記外輪体と内筒との間に、多数の放
熱フィンを放射状配置に具備するものとなすことにより
、ドラムの一端側からファンによって強制空冷を促す手
段との併用によって、充分な放熱促進効果が得られるよ
うにする。更には、この放熱フィンに多数の切込みを入
れて折曲げ或いは捻ることにより冷却空気に乱流を生ぜ
しめる多数の歪曲状の舌片を形成せしめ、もって更に一
層放熱効果を増大させかつドラムの表面温度の均一化効
果が得られるようにする。(Means for Solving the Problems) In order to achieve the above object, the present invention first provides a bearing inner cylinder that is integrally provided within the outer ring body constituting the drum cylinder and concentrically therewith. This makes it possible to simply and accurately support the rotation of the drum by inserting the drum shaft into the inner cylinder, and also to easily attach and detach the drum. In addition, by providing a large number of heat dissipating fins in a radial arrangement between the outer ring body and the inner cylinder, a sufficient heat dissipation promoting effect can be achieved by using this in combination with means for promoting forced air cooling using a fan from one end of the drum. be obtained. Furthermore, by making a large number of cuts in the heat dissipating fins and bending or twisting them, a large number of distorted tongues that create turbulent flow in the cooling air are formed, thereby further increasing the heat dissipating effect and reducing the surface of the drum. To achieve a temperature uniformity effect.

更にまた、上記内筒及び放熱フィンを備えた内輪体と、
これとは別に製作した外輪体とを互いに組合わせて一体
化したものとなすことにより、簡易な製造工程で、上記
のような構成をもつ感光ドラムを高１１度に製作しうる
ちのとなすものである。Furthermore, an inner ring body including the inner cylinder and heat radiation fins,
By combining the outer ring body, which was manufactured separately, and making it into an integrated body, a photosensitive drum having the above configuration can be manufactured with a height of 11 degrees using a simple manufacturing process. It is.

従って、この発明に係る複写機用感光ドラムは、軸受内
筒の外周面に複数の放射状放熱フィンが軸線方向に沿っ
て一体に形成された押出型材からなる内輪体と、これが
緊密に挿入されかつ内面に一体的に密接固定された円筒
状の外輪体とよりなり、前記内輪体の放熱フィンの少な
くとも外方縁部に所定間隔おきに切込みが入れられ、か
つこの切込みの相互間の部分が曲げられ或いは捻られる
ことにより乱流形成用歪曲舌片が形成されてなることを
特徴とするものである。Therefore, the photosensitive drum for a copying machine according to the present invention includes an inner ring body made of an extruded material in which a plurality of radial heat dissipating fins are integrally formed along the axial direction on the outer peripheral surface of an inner cylinder of the bearing, and the inner ring body is tightly inserted. It consists of a cylindrical outer ring body that is integrally and closely fixed to the inner ring body, and at least the outer edge of the radiation fins of the inner ring body has cuts made at predetermined intervals, and the parts between the cuts are bent. It is characterized in that a turbulent flow forming distorted tongue piece is formed by being bent or twisted.

（実施例） 以下、この発明の★流側を図面に基づいて詳しく説明す
る。(Example) Hereinafter, the ★ side of the present invention will be explained in detail based on the drawings.

第１図ないし第４図において、（１）は表面に感光層が
形成されるドラム・シリンダとしての外輪体であり、（
２）はその内部に挿入されかつ一体的に組合わされた内
輪体であって、外輪体（１）と同心に位置する軸受用の
内筒（３）と、これの外周面から放射状にのびた多数の
放熱フィン（４）とを有する。In Figures 1 to 4, (1) is an outer ring body as a drum cylinder on which a photosensitive layer is formed;
2) is an inner ring body inserted into the inner ring body and integrally combined with the outer ring body (1), and a bearing inner cylinder (3) located concentrically with the outer ring body (1), and a number of radially extending from the outer circumferential surface of the inner ring body (3). radiating fins (4).

上記外輪体（１）は、アルミニウム合金をもって円筒状
に押出し成形したのち、引抜き加工を施すことによって
、所要の直径の高精度な円筒状に形成されたものであり
、その成形時には内径が内輪体（２）の外径、即ち放熱
フィンく４）の先端を結ぶ円の直径より僅かに大きいか
ほぼ同じ程度に形成されるものである。The outer ring body (1) is formed into a highly accurate cylindrical shape with a desired diameter by extruding an aluminum alloy into a cylindrical shape and then drawing it. The outer diameter of (2) is slightly larger than or approximately the same as the diameter of the circle connecting the tips of the heat dissipating fins 4).

一方、内輪体く２）は、アルミニウム合金による押出し
成形により、軸受内筒（３）と、その軸線方向に沿った
複数の放熱フィン（４）とを一体に形成したものであっ
て、しかも該成形後に、少なくとも各・放熱フィン（４
）の外方縁部に所定間隔置きに多数個の切込み（５）が
入れられ、かつこの隣接切込み（５）（５）間の部分が
、第３図に示されるように順次反対向きに所定角度折曲
げられ、あるいは第４図に示すように捻られることによ
って、多数の乱流形成用の歪曲舌片（４ａ）又は（４’
　ａ　）が形成されたものとなされている。On the other hand, the inner ring body 2) is formed by extruding an aluminum alloy to integrally form a bearing inner cylinder (3) and a plurality of heat dissipating fins (4) along the axial direction of the bearing inner cylinder (3). After molding, at least each heat dissipation fin (4
), a large number of notches (5) are made at predetermined intervals on the outer edge of the By being bent at an angle or twisted as shown in FIG. 4, a large number of distorted tongues (4a) or (4'
a) is assumed to have been formed.

而して、この発明に係る感光ドラムは、上記のような外
輪体（１）と内輪体（２）をそれぞれ別個に製作したの
ち、それらを互いに嵌め合わせて一体化することにより
製作されるものである。この外輪体（１）と内輪体（２
）との組合わせ一体化の方法は次の２つの方法が択一的
にあるいは組合わせにおいて採用される。Therefore, the photosensitive drum according to the present invention is manufactured by separately manufacturing the outer ring body (1) and the inner ring body (2) as described above, and then fitting them together to integrate them. It is. This outer ring body (1) and inner ring body (2
) The following two methods may be adopted alternatively or in combination.

即ち、その１つの方法は、予め外輪体（１）の内径を内
輪体（２）の外径より僅かに大きめに形成したものとし
、両者を第３図矢印（イ）で示すように嵌め合わせたの
ち、所謂合わせ引きと称されるような引抜き加工を施す
ことにより、外輪体（１）を僅かに縮径せしめ、その内
面に内輪体く２）の放熱フィン（４）の先端を強（密接
せしめることによって両者と一体的に組合わせるもので
ある。That is, one method is to make the inner diameter of the outer ring body (1) slightly larger than the outer diameter of the inner ring body (2) in advance, and then fit the two together as shown by the arrow (A) in Figure 3. After that, the diameter of the outer ring body (1) is slightly reduced by performing a drawing process called a drawing process, and the tips of the heat dissipating fins (4) of the inner ring body (2) are attached to the inner surface of the outer ring body (1). By bringing them into close contact with each other, the two are integrally combined.

また、他の１つの方法は、外輪体（１）として予めその
内面にろう材層（７）を被覆形成せしめたものに製作し
、これに内輪体を嵌め合わせたのち、上記ろう材層の融
点以上に加熱してろう付けを施すことにより、外輪体（
１）と内輪体（２）とを接合一体化するものである。第
２図において（７ａ）はこのろう付けによるフィレット
部を示す。Another method is to manufacture an outer ring body (1) whose inner surface is coated with a brazing metal layer (7), fit the inner ring body thereto, and then apply the brazing metal layer (7) to the outer ring body (1). By heating above the melting point and brazing, the outer ring body (
1) and the inner ring body (2) are joined and integrated. In FIG. 2, (7a) shows the fillet portion formed by this brazing.

なお、上配ろう付けによる場合におい′Ｃも、その前に
予め前記第１の方法と同じく合わせ引きを施して内外両
輪体（１）（２＞を密接せしめておくものとすることが
望ましい。また、乱流形成用歪曲舌片（４ａ）　（４’
　ａ　）は、図示のように放熱フィン（４）の外方縁部
（先端部）のみに形成する場合のほか、切込み（５）を
更に深く形成して、放熱フィン（４）の略全幅に亘る状
態に形成するものとしてもよい。In addition, in the case of upper brazing, it is preferable that the inner and outer wheels (1) and (2>) be brought into close contact with each other by applying a mating process in advance in the same way as in the first method. In addition, the turbulent flow forming distorted tongue piece (4a) (4'
In addition to forming the cut (5) only on the outer edge (tip) of the heat dissipation fin (4) as shown in the figure, the notch (5) is formed deeper to cover almost the entire width of the heat dissipation fin (4). It may be formed in such a state that it spans.

（発明の効果） この発明に係る感光ドラムは、前述のように、外輪体（
１）の中心部に、これと同心配置に内輪体（２）の軸受
内筒（３）が位置されたものであるから、該ドラムは上
記内筒（３）にドラム軸を挿通ずることによって複写機
内に容易に軸支可能であり、従来品のように別途フラン
ジ体や軸受等の付属部品を要することなく回転支承が可
能なものとなし得て、支承構造の大幅な簡略化をはかり
うる。(Effects of the Invention) As described above, the photosensitive drum according to the present invention has an outer ring body (
1), the bearing inner cylinder (3) of the inner ring body (2) is located concentrically with this, so the drum can be assembled by inserting the drum shaft into the inner cylinder (3). It can be easily pivoted inside a copying machine, and can be rotatably supported without the need for separate accessories such as flanges or bearings like conventional products, allowing for a significant simplification of the supporting structure. .

また、上記軸受内筒（３）は、その周面から放射状にの
びた複数の放熱フィン〈４）を介して外輪体（１）の中
心部に保持されたものであるから、内筒（３）に通した
ドラム軸に対して外輪体（１）の中心を常に正確に一致
せしめたものとすることができると共に、外輪体（１）
自体、引抜き加工によって高精度に仕上げることができ
、高い真円精度を出しうろことも相俟って、感光ドラム
の周りに近接配置されるコロナ放電器群、現像器、ある
いは転写紙ガイド等との距離を正確に一定に保ち得るも
のとなすことができる。従って、不本意にドラムの周面
がそれらに接触するというようなトラブルの発生を完全
に回避しうる。Furthermore, since the bearing inner cylinder (3) is held at the center of the outer ring body (1) via a plurality of heat dissipating fins (4) extending radially from its circumferential surface, the inner cylinder (3) The center of the outer ring body (1) can always be accurately aligned with the drum shaft passed through the drum shaft, and the outer ring body (1)
The product itself can be finished with high precision by drawing processing, and together with the scales achieving high roundness accuracy, it is easy to use with corona dischargers, developers, transfer paper guides, etc. that are placed close to the photosensitive drum. The distance can be maintained accurately and constant. Therefore, the occurrence of troubles such as the peripheral surface of the drum inadvertently coming into contact with them can be completely avoided.

更に、この発明は、内輪体（２）と外輪体（１）とを各
別に成形し、それらを一体に組合わせて製品となされた
ものであるから、製造工程のすべて、あるいはほとんど
を、押出し、引抜き、合わせ引きというような素管工程
で行うことができ、特別な設備を要することなく、殊に
長尺の感光ドラムの製作にあっても容易にかつ能率的に
製作しうると共に、真円度等の精度の高いドラムを簡単
に製作提供しうる。Furthermore, in this invention, the inner ring body (2) and the outer ring body (1) are molded separately and then combined into a product, so all or most of the manufacturing process is performed by extrusion. It can be carried out in the tube manufacturing process such as drawing, drawing, and drawing, and does not require special equipment, and can be manufactured easily and efficiently, especially when manufacturing long photosensitive drums. To easily manufacture and provide a drum with high accuracy such as roundness.

また、外輪体（１）に対して、これとは別に、軸受内筒
（３）の周りに放熱フィン（４）を備えた内輪体（２）
を製作して、爾後的にそれらを組合わせるものであるか
ら、全体を押出し等で一体成形するような場合には著し
く困難であるような多数個の放熱フィン（４）を備えて
、しかもそれらがすべて外輪体（１）の内面に良好な伝
熱接触状態を保って密接したものとなしうる。従って、
放熱性に優れた感光ドラムを得ることができ、コロナ放
電器による放電、更にはランプからの光の照射を受けて
外周面が熱せられても、速やかに放熱して過熱現象を生
じることがなく、ドラムの回転スピードを上げて高速化
をはかりうるちのとなすことができる。殊に、第１図に
示すように、ドラムの一端から冷却用ファン（６）で風
を送って強制空冷を行うこ仁により、放熱作用を愈々促
進しうるちのとなすことができ、従ってこのような場合
には、感光ドラムの周面で加熱定着ローラにより転写紙
上の転写画像の定着を行わしめるような場合においてさ
え、これによって加熱されたドラムの外周面部が帯電部
に至るまでに、該外面部分の温度を充分に所要の低い温
度にまで下げることが可能となり、ひいては複写機の一
層の小型化をはかるうえで非常に有効なものとなしうる
。In addition, in addition to the outer ring body (1), an inner ring body (2) is provided with heat dissipation fins (4) around the bearing inner cylinder (3).
Since it is necessary to fabricate a large number of heat dissipating fins (4) and then combine them, it is extremely difficult to mold the entire body in one piece by extrusion or the like. All of them can be brought into close contact with the inner surface of the outer ring body (1) while maintaining good heat transfer contact. Therefore,
A photosensitive drum with excellent heat dissipation properties can be obtained, and even if the outer peripheral surface is heated due to discharge from a corona discharger or irradiation with light from a lamp, heat is dissipated quickly and no overheating phenomenon occurs. , it is possible to increase the rotation speed of the drum to increase the speed. In particular, as shown in Figure 1, by blowing air from one end of the drum with a cooling fan (6) to perform forced air cooling, the heat dissipation effect can be easily promoted. In such a case, even when the transferred image on the transfer paper is fixed by a heating fixing roller on the circumferential surface of the photosensitive drum, the heated outer circumferential surface of the drum may not reach the charging section. It becomes possible to lower the temperature of the outer surface portion to a sufficiently low temperature, and this can be very effective in further downsizing the copying machine.

更にまた、上記放熱フィン（４）の少なくとも外方縁部
に多数の切込みを入れて乱流形成用歪曲舌片（４ａ＞　
（４’　ａ　）が形成されたものとなされているから、
上記ファン（６）による冷却促進時において冷却空気に
外輪体（１）内で乱流を生じさせ愈々放熱効果を増大し
うると共に、ドラムの表面温度を全体に亘って均一なも
のとすることができる。Furthermore, a large number of cuts are made in at least the outer edge of the heat dissipation fin (4) to form a turbulent flow forming distorted tongue piece (4a>
(4'a) is assumed to have been formed, so
When the fan (6) promotes cooling, it is possible to generate turbulent flow in the cooling air within the outer ring (1), thereby increasing the heat dissipation effect, and making the surface temperature of the drum uniform over the entire surface. can.

以上の次第でこの発明によれば、極めて簡単な構成にし
て、感光ドラムの正確な回転中心の設定配置を可能とし
、偏心回転等によるトラブルの発生の問題を回避しうる
のはもとより１．感光ドラムの脱着操作も簡易に行いう
るちのとなしうる。また、外筒に一体成形ブる場合には
側底不可能であるような多数個の放熱フィンの設置が可
能であり、放熱性能に極めて優れたものとなしうろこと
によって、長時間の連続使用によっても過熱によるトラ
ブルを発生するおそれがなく、かつ全長に亘って略均整
な表面湿度に制御し得て、良好な機能を保持すると共に
、感光ドラム自体の小型化に加えて、該ドラムの周りで
転写紙上のトナーの加熱定着を行わしめることにより定
着機構の簡素化をはかることを可能とすることも相俟っ
て、複写機の小型化に太き（貢献を果しうる顕著な効果
を奏する。As described above, according to the present invention, it is possible to accurately set and arrange the rotation center of the photosensitive drum with an extremely simple structure, and it is possible to avoid troubles caused by eccentric rotation and the like.1. The photosensitive drum can be easily attached and detached. In addition, when integrally molded into the outer cylinder, it is possible to install a large number of heat dissipation fins, which is not possible on the side bottom, resulting in extremely excellent heat dissipation performance. There is no risk of trouble caused by overheating, and the surface humidity can be controlled to be approximately even over the entire length, maintaining good functionality.In addition to downsizing the photosensitive drum itself, Coupled with the fact that it is possible to simplify the fixing mechanism by heating and fixing the toner on the transfer paper, this technology has a significant effect that can significantly contribute to the miniaturization of copying machines. play.

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

第１図はこの発明の実施例を示す一部切欠き斜視図、第
２図は第１図■−■線の断面図、第３図は外輪体と内輪
体を組合わせる前の状態の一部縦断面図、第４図は乱流
形成用歪曲舌片の変形例を示す内輪体の一部斜視図であ
る。 （１）・・・外輪体、（２）・・・内輪体、（３）・・
・軸受内筒、（４）・・・放熱フィン、（４ａ）　（４
’ａ）・・・歪曲舌片、（６）・・・冷却用ファン、（
７）・・・ろう材層。 以　上Fig. 1 is a partially cutaway perspective view showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line FIG. 4 is a partial perspective view of the inner ring body showing a modification of the turbulent flow forming distorted tongue. (1)... Outer ring body, (2)... Inner ring body, (3)...
・Bearing inner cylinder, (4)...radiating fin, (4a) (4
'a)... Distorted tongue piece, (6)... Cooling fan, (
7)...Brazing metal layer. that's all

Claims (2)

【特許請求の範囲】[Claims] （１）　軸受内筒の外周面に複数の放射状放熱フィンが
軸線方向に沿って一体に形成された押出型材からなる内
輪体と、これが緊密に挿入されかつ内面に一体的に密接
固定された円筒状の外輪体とよりなり、前記内輪体の放
熱フィンの少なくとも外方縁部に所定間隔おきに切込み
が入れられ、かつこの切込みの相互間の部分が曲げられ
或いは捻られることにより乱流形成用歪曲舌片が形成さ
れてなることを特徴とする電子複写機用感光ドラム。(1) An inner ring made of an extruded material in which a plurality of radial heat dissipation fins are integrally formed along the axial direction on the outer peripheral surface of the inner cylinder of the bearing, and a cylinder into which this is tightly inserted and integrally and closely fixed to the inner surface. an outer ring body having a shape, at least the outer edge of the heat dissipating fins of the inner ring body are cut at predetermined intervals, and the portions between the cuts are bent or twisted to form a turbulent flow. A photosensitive drum for an electronic copying machine, characterized in that a distorted tongue piece is formed. （２）　内面にろう材層を被覆形成した外輪体の上記ろ
う材により、該外輪体の内面に内輪体の放熱フィンの先
端部がろう付は接合一体化されている特許請求の範囲第
１項記載の電子複写機用感光ドラム。(2) The tip of the heat dissipating fin of the inner ring body is integrally brazed to the inner surface of the outer ring body by the brazing material of the outer ring body whose inner surface is coated with a brazing metal layer. A photosensitive drum for an electronic copying machine as described in .
JP59106264A 1984-05-24 1984-05-24 Photosensitive drum for electrophotographic copying machine Granted JPS60249177A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59106264A JPS60249177A (en) 1984-05-24 1984-05-24 Photosensitive drum for electrophotographic copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59106264A JPS60249177A (en) 1984-05-24 1984-05-24 Photosensitive drum for electrophotographic copying machine

Publications (2)

Publication Number Publication Date
JPS60249177A true JPS60249177A (en) 1985-12-09
JPH0123785B2 JPH0123785B2 (en) 1989-05-08

Family

ID=14429233

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59106264A Granted JPS60249177A (en) 1984-05-24 1984-05-24 Photosensitive drum for electrophotographic copying machine

Country Status (1)

Country Link
JP (1) JPS60249177A (en)

Also Published As

Publication number Publication date
JPH0123785B2 (en) 1989-05-08

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