JPS61196278A - Rotating body suitable to photosensitive drum for electrophotographic copying machine - Google Patents

Rotating body suitable to photosensitive drum for electrophotographic copying machine

Info

Publication number
JPS61196278A
JPS61196278A JP60038379A JP3837985A JPS61196278A JP S61196278 A JPS61196278 A JP S61196278A JP 60038379 A JP60038379 A JP 60038379A JP 3837985 A JP3837985 A JP 3837985A JP S61196278 A JPS61196278 A JP S61196278A
Authority
JP
Japan
Prior art keywords
rotating body
photosensitive drum
heat dissipation
fins
copying machine
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
JP60038379A
Other languages
Japanese (ja)
Inventor
Yoichi Sato
洋一 佐藤
Ryo Hashimoto
橋本 凉
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 JP60038379A priority Critical patent/JPS61196278A/en
Publication of JPS61196278A publication Critical patent/JPS61196278A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/75Details relating to xerographic drum, band or plate, e.g. replacing, testing
    • G03G15/751Details 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)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To improve radiation performance more by forming radiation fins so that intermediate parts are separated mutually and both side edge parts are superposed. CONSTITUTION:The main body 1 of a rotating body is equipped with an external cylinder which has a photosensitive layer formed on its surface when used as a photosensitive drum of forms a support conveying part for transfer paper when used as a cooling roller, and an internal cylinder 3 for bearing which is provided therein concentrically. Those cylinders 2 and 3 are coupled together in one body with plural radial coupling ribs 4. Then plural radiation fins 5 are inserted and installed radially in axial directions between adjacent radial coupling ribs 4 and 4 between the internal and external cylinders 3 and 2. Those radiation fins 5 are each formed by folding a beltlike plate 6 which has recessed parts 61 and 61 at nearly symmetrical positions about the breadth-wise center line L inward along the center line and then tip parts together.

Description

【発明の詳細な説明】 産業上の利用分野 この発明は電子複写機における静電感光ドラムや転写紙
の冷却送り出し用の冷却ローうとして用いるのに適した
回転体に関する。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention This invention relates to a rotating body suitable for use as an electrostatic photosensitive drum in an electronic copying machine or as a cooling row for cooling and feeding transfer paper.

従来の技術 従来、この種の感光ドラムや冷却ローラとしてアルミニ
ウム等の金属からなる中空円筒状の回転体が用いられて
いる。そしてこれを回転支承するために、該回転体の両
端に別途形成した1対の7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回転体と一体化するとと
もに、7ランジ部材に取付けたボールベアリング等の軸
受を介して、ドラム軸やローラ軸に着脱自在に軸支せし
めるものとなされている。
2. Description of the Related Art Conventionally, hollow cylindrical rotating bodies made of metal such as aluminum have been used as photosensitive drums and cooling rollers of this type. In order to rotationally support this, a pair of separately formed 7-lunge members are applied to both ends of the rotating body, and these are fastened with a plurality of fastening bolts to integrate with the rotating body, and the 7-lunge members are It is designed to be removably supported on a drum shaft or roller shaft via an attached 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や冷]jJJ 
D−ラでは、回転体のほかに、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するため、部品点
数が増し、構造が複雑化してコメ1−高につくのみなら
ず、例えば感光体の疲労、損傷等によって回転体を交換
する必要を生じた場合に、その脱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, the conventional photosensitive drum and cold
In D-Ra, in addition to the rotating body, there is a
Since a pair of flanges, bearings, etc. are required separately, the number of parts increases, the structure becomes complicated, and the cost is increased. For example, due to fatigue or damage to the photoconductor, it is necessary to replace the rotating body. When this occurs, it has the disadvantage that it requires a complicated procedure for attachment and detachment, which requires a lot of effort.

また、感光ドラムや冷却ローラの回転支承においても、
回転体をこれとは別体であるフランジ部、軸受を介して
ドラム軸ないしはローラ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回転体の中心がド
ラム軸等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、複写機能上あるいは転写紙の送り出し上に種
々の悪影響を及ぼすことがあった。
Also, in the rotation support of photosensitive drums and cooling rollers,
Since the rotating body is supported on the drum shaft or roller shaft via a separate flange and bearing,
Due to the accumulation of errors between each member, the center of the rotating body may not match the center of the drum shaft, etc. over its entire length, which may have various negative effects on the copying function or the feeding of the transfer paper. .

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や冷却ローラも小
さくなりつつある。しかるに、従来の感光ドラムや冷却
ローラでは、それを構成する回転体の放熱性が悪いうえ
、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、感光ドラムにあってはコロナ放電器やランプによる
加熱に対し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
問題点が生じており、一方冷却ローラにあっては冷却能
力の低下によりローラの蓄熱量が増大し、複写機から出
てきた転写紙に相当の帯熱が認められるというような不
都合が生じている。しかも、感光ドラムの場合には、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、加熱定着ロールを密接配置し
て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
もなされており、ドラムの温度上昇に益々拍車がかかる
傾向にある。
Furthermore, in recent years, there has been an increasingly strong demand for miniaturization of electronic copying machines, and accordingly, photosensitive drums and cooling rollers are also becoming smaller. However, in conventional photosensitive drums and cooling rollers, the rotating bodies that make up the drums have poor heat dissipation properties, and combined with the tendency for surface areas to decrease due to miniaturization, photosensitive drums are not equipped with corona dischargers or When heated by a lamp, the drum tends to overheat, resulting in problems such as a significant drop in the charging performance of the photoreceptor, or the toner melting on the drum surface, impeding good transfer to copy paper. On the other hand, as for the cooling roller, the amount of heat stored in the roller increases due to a decrease in its cooling capacity, resulting in disadvantages such as a considerable amount of heat being observed in the transfer paper that comes out of the copying machine. Moreover, in the case of a photosensitive drum, after the image is transferred to a transfer paper, the heating and fixing operation of the developed image electrostatically adhered to the transfer paper is performed around the photosensitive drum by closely disposing a heat fixing roll. Attempts have been made to reduce the space required to provide a separate fixing section, which tends to increase the temperature of the drum more and more.

このような問題点に対して、感光ドラムや冷却ローラの
放熱性を上げるために、その回転体内面に放熱フィンと
して作用する凸条を一体形成づ゛る提案が既になされて
いる(例えば特開昭54−103358号公報、実開昭
56−120566号公報)が、このような一体成形フ
ィンは、その数を増すことに限度があり、所期するにう
な冷却効果を実現しうるちのではなかった。
To address these problems, proposals have already been made to integrally form protrusions that act as heat dissipation fins on the inner surface of the rotating body in order to improve the heat dissipation of photosensitive drums and cooling rollers (for example, in JP-A No. However, there is a limit to the number of such integrally molded fins that can be increased, and it is not possible to achieve the desired cooling effect. Ta.

この発明は、上記のような諸問題の解決をはかる回転体
の提供を目的とする。即ち、第1には回転体の放熱性を
顕著に増大せしめることにより、例えば感光ドラムとし
て加熱定着ロールを周面の一部に接触せしめたような場
合にも、回転によって静電潜像を形成せしめる帯電部に
至るまでの過程で表面温度を充分に下降せしめうるよう
なものとなすこと、また、第2には、ドラム軸等への支
承構造を簡素化し、その脱着操作を容易に行いうるちの
とすると共に、回転体の中心をドラム軸等の中心に正確
に合致せしめることができ、回転中心に狂い、誤差を生
じるおそれのないようなものとすること等を目的とする
The object of the present invention is to provide a rotating body that solves the above-mentioned problems. Firstly, by significantly increasing the heat dissipation of the rotating body, it is possible to form an electrostatic latent image by rotation, even when a heating fixing roll is brought into contact with a part of the circumferential surface of the photosensitive drum, for example. Second, the supporting structure for the drum shaft, etc. can be simplified, and its attachment and detachment operations can be easily performed. In addition, it is an object of the present invention to make it possible to accurately align the center of a rotating body with the center of a drum shaft, etc., without causing a risk of deviation from the center of rotation and causing an error.

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、回転体の構
成を、感光層の支持体あるいは転写紙の搬送支持部とな
る外筒の内部に1.軸受となる管状の内筒が、複数個の
放射状連結リブを介して一体成形されたものとすること
により、前記内筒にドラム軸等を挿通して簡単かつ正確
にその支承を可能なものとし、かつその脱着も容易に行
いうるちのとする。また上記内外両筒間に、軸線方向に
沿って放熱フィンを挿入設置することにより、好ましく
は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
うにし、更には上記放熱フィンに特に、帯状板を幅の中
央部より2つ折状に折曲して先端部を合掌せしめること
により、中間部を互いに分離した遊離部とし、両側縁部
を重なり状の重合縁部に形成したものを用いることによ
って、フィン密度を増大し、ひいてはフィンの放熱面積
を大とナシ、放熱作用の可及的促進をはかりうるように
したものである。
Means for Solving the Problems In order to achieve the above-mentioned object, the present invention has a rotating body configured such that 1. By integrally molding a tubular inner cylinder that serves as a bearing with a plurality of radial connecting ribs, it is possible to insert a drum shaft, etc. into the inner cylinder and easily and accurately support it. , and can be easily attached and detached. In addition, by inserting and installing heat dissipating fins along the axial direction between the above-mentioned inner and outer cylinders, a sufficient heat dissipation promotion effect can be obtained, preferably in combination with means for promoting forced air cooling using a fan from one end of the drum. Furthermore, in particular, in the above-mentioned heat dissipation fin, the band-shaped plate is bent in half from the center of the width and the tips are pressed together, so that the middle part is a separate part and the side edges are overlapped. By using the fins formed on the overlapping edges of the fins, the fin density is increased, and the heat dissipation area of the fins is not required to be large, so that the heat dissipation effect can be promoted as much as possible.

即ち、この発明は、軸受用内筒と、外筒とが複数個の放
射状連結リブを介して同心に一体成形された本体と、帯
状板を幅の中央部より2つ折状に折曲して先端部を合掌
せしめることにより、中間部を互いに分離した遊離部と
し、両側縁部を重なり状の重合縁部に形成したフィンと
からなり、該フィンが前記本体の内外両筒間に、隣接す
る各放射状連結リブ間の位置において、軸線方向に沿っ
て挿入されかつ接合固定されてなることを特徴とする電
子複写機用感光ドラムなどに適した回転体を要旨とする
ものである。
That is, this invention has a main body in which an inner cylinder for a bearing and an outer cylinder are integrally molded concentrically via a plurality of radial connecting ribs, and a belt-shaped plate that is bent in half from the center of its width. The tip part is pressed together to form a free part separated from each other in the middle part, and fins are formed in both side edges as overlapping edges, and the fins are adjacent to each other between the inner and outer cylinders of the main body. The gist of the present invention is to provide a rotating body suitable for a photosensitive drum for an electronic copying machine, etc., which is inserted along the axial direction and bonded and fixed at a position between each radial connecting rib.

実施例 以下、この発明の実施例を図面に基づいて詳しく説明す
る。
EXAMPLES Hereinafter, examples of the present invention will be described in detail based on the drawings.

第1図および第2図において、(1)は回転体の本体で
あり、該本体(1)は、感光ドラムの場合には表面に感
光層が形成され、冷却ローラの場合には転写紙の支持搬
送部となる外筒(2)と、これの内部に同心に設けられ
た軸受用の内筒(3)を備えている。そしてこれら両筒
(2)(3)は複数本の放射状連結リブ(4)によって
相互に一体的に連結されている。このような内外二重筒
からなる成形体は、例えばアルミニウム合金の押出し成
形により、容易に製作することができるもの□である。
In FIGS. 1 and 2, (1) is the main body of a rotating body, and the main body (1) has a photosensitive layer formed on its surface in the case of a photosensitive drum, and a transfer paper in the case of a cooling roller. It includes an outer cylinder (2) serving as a support and conveyance section, and an inner cylinder (3) for a bearing provided concentrically inside the outer cylinder (2). These two cylinders (2) and (3) are integrally connected to each other by a plurality of radial connecting ribs (4). Such a molded body consisting of an inner and outer double cylinder can be easily manufactured by extrusion molding of an aluminum alloy, for example.

なお、特に外筒(2)は、強度、重量、放熱性等の関係
で、肉厚を2〜4m程度に形成するのが有利である。
In particular, it is advantageous for the outer cylinder (2) to have a wall thickness of about 2 to 4 m in terms of strength, weight, heat dissipation, etc.

また、図示実施例において、放射状連結リブ(4)は、
等間隔に4個設けたものを示したが、2個以上であれば
何個設けても良く、一般的には8個程度までの範囲で任
意に設定される。
In the illustrated embodiment, the radial connecting ribs (4) are
Although four pieces are provided at equal intervals in the example shown, any number of pieces may be provided as long as there are two or more pieces, and generally, the number is arbitrarily set within the range of about eight pieces.

上記内外両筒(3)(2)間には、隣接する放射状連結
リブ(4)(4)間の位置において、それぞれ複数個の
放熱フィン(5)が、軸線方向に沿って放射状配置に挿
入設置されている。
Between the inner and outer cylinders (3) (2), a plurality of heat dissipation fins (5) are inserted in a radial arrangement along the axial direction at positions between the adjacent radial connecting ribs (4) (4). is set up.

この放熱フィン(5)は第3図(a )に示すように、
幅方向の中央線(L)に関する略対称位置に、断面口字
状の凹部(61>  (61)を形成した帯状板(6)
を、第3図(b)に示すように中央線(L)で内側に2
つ折状に折曲して先端部を合掌せしめることにより形成
されたものであり、従って第3図(C)に示すように、
中間部を互いに分離して対向する遊離部(51)となさ
れ、両側縁部を重なり状の重合縁部(52)となされた
ものである。かつ、放熱フィン(5)の幅は、内外両筒
(3)(2)間の距離、すなわち連結リブ(4)の高さ
に対応しており、放熱フィン(5)の両側の重合縁部が
内筒(3)の外面及び外筒(2)の内面にそれぞれ接合
一体化されている。この放熱フィン(5)の挿入操作を
容易化し、その位置決めを正しく行うために、内外両筒
(3)<2)には対向状にそれぞれ多数条の細溝(7)
(8)が設けられており、これらに放熱フィン(5)の
上記両側縁部がはめ込まれたものとなされている。また
、放熱フィン(5)の上記接合固定は、放熱フィン(5
)にアルミニウムプレージングシートを用いることによ
り、その皮材(ろう材)を溶融せしめて両側縁部を外筒
(2)及び内筒(3)にろう付は接合することにより行
うのが最も簡易であり一般的である。実施例もこのよう
な手法で放熱フィンの接合固定が行われているものであ
る。なお、上記の実施例では、放熱フィン(5)の長さ
を本体(1)の長さと略同じに形成したものを示したが
、放熱フィン(5)の長さあるいは挿入枚数等は、回転
体の使用条件等との関係で設計的に適宜に決められるも
のである。
As shown in Fig. 3(a), this heat dissipation fin (5)
A belt-shaped plate (6) in which a concave portion (61) with a cross-sectional opening shape is formed at a substantially symmetrical position with respect to the center line (L) in the width direction.
2 inside at the center line (L) as shown in Figure 3(b).
It is formed by folding it into a folded shape and pressing the tips together, so as shown in Figure 3 (C),
The middle portions are separated from each other to form opposing free portions (51), and both side edges are overlapped overlapping edges (52). In addition, the width of the radiation fin (5) corresponds to the distance between the inner and outer cylinders (3) (2), that is, the height of the connecting rib (4), and the width of the overlapping edge on both sides of the radiation fin (5) corresponds to the distance between the inner and outer cylinders (3) (2). are integrally joined to the outer surface of the inner cylinder (3) and the inner surface of the outer cylinder (2), respectively. In order to facilitate the insertion operation of the heat dissipation fins (5) and to correctly position them, a large number of thin grooves (7) are formed in opposite directions in both the inner and outer cylinders (3)<2).
(8) are provided, into which the above-mentioned both side edge portions of the radiation fin (5) are fitted. In addition, the above-mentioned bonding and fixing of the heat dissipation fin (5)
) by using an aluminum plating sheet, melting the skin material (brazing material), and brazing the both side edges to the outer cylinder (2) and inner cylinder (3). and is common. In this embodiment, the heat dissipation fins are also bonded and fixed using this method. In the above embodiment, the length of the heat dissipation fins (5) is approximately the same as the length of the main body (1), but the length of the heat dissipation fins (5) or the number of inserts may vary depending on the rotation. This can be determined as appropriate from a design perspective in relation to the usage conditions of the body.

第4図はこの発明の他の実施例を示すものである。この
実施例は、放熱フィン(5′)として互いに長さを異に
した複数個のものを含むことによって、回転体の一端に
臨んで配置される冷却用ファン(9′)からの冷却空気
流入側の一端から他端に至るに従って、漸次段階的にフ
ィンピッチが密に構成された場合を示すものである。す
なわち、放熱フィン(5′)は、ドラムの略全長に対応
する長さの最も長い第1フィン(5a)と、これより長
さを所定距離短くした第2フイン(5b)と、更にこれ
より長さの短い第3フイン(5G)とを含む。そして、
長さの長い第1フイン(5a)は、隣接の各連結リブ(
4)(4)間において、それらの中央部にそれぞれ2個
づつ挿入設置され、第2フイン(5b)は、一端を上記
第1フイン(5a)の一端に揃えて該第1フインを挾ん
で両側に2枚づつ挿入設置され、更に第3フイン(5C
)は、同じく一端を上記に揃えて第1フインどうしの間
及び第1フイン(5a)と第2フイン(5b)との間に
各1枚づつ挿入設置されている。従って、冷却用ファン
(9′)からの冷却空気流入側の一端部から、同出口側
の他端部に至るに従って、放熱フィン(5′)のピッチ
は段階的に漸次密に構成されたものとなされている。即
ち、第5図ないし第7図に示すように、ドラムの全長の
うち、上記一端側の約1/3程度の長さ範囲では、第7
図に示すように第1フイン(5a)のみが存在する疎な
フィンピッチとなされ、中間部の約1/3程度の長さ範
囲では、第6図に示すように第1及び第2フイン(5a
)  (5b)が共存し、更に他端側の約1/3程度の
長さ範囲に至ると、第5図に示すように第1、第2及び
第3フイン(5a)(5b)  (5c)が共存して密
なフィンピッチに構成されている。このようにフィンピ
ッチを段階的に変えることによって、回転体の長さ方向
の全長に亘って放熱効率を略均−化することができる。
FIG. 4 shows another embodiment of the invention. This embodiment includes a plurality of radiation fins (5') having different lengths, so that cooling air can flow in from a cooling fan (9') placed facing one end of the rotating body. This figure shows a case in which the fin pitch is gradually increased from one end to the other end of the side. That is, the radiation fins (5') include a first fin (5a) having the longest length corresponding to approximately the entire length of the drum, a second fin (5b) shorter than this by a predetermined distance, and a second fin (5b) shorter than this by a predetermined distance. The third fin (5G) is short in length. and,
The long first fin (5a) connects each adjacent connecting rib (
4) In between (4), two fins are inserted into the center of each of the second fins (5b), and the second fins (5b) sandwich the first fins with one end aligned with one end of the first fin (5a). Two fins are inserted on each side, and a third fin (5C
) are respectively inserted between the first fins and between the first fin (5a) and the second fin (5b) with one end aligned as above. Therefore, the pitch of the heat dissipation fins (5') gradually becomes denser from one end on the inlet side of the cooling air from the cooling fan (9') to the other end on the outlet side. It is said that That is, as shown in FIGS. 5 to 7, in the length range of about 1/3 on the one end side of the total length of the drum, the seventh
As shown in the figure, the fin pitch is sparse with only the first fin (5a) present, and in the length range of about 1/3 of the middle part, the first and second fins (5a) are present as shown in FIG. 5a
) (5b) coexist and further extend to about 1/3 of the length on the other end side, the first, second and third fins (5a) (5b) (5c ) coexist and are configured with a dense fin pitch. By changing the fin pitch stepwise in this manner, the heat dissipation efficiency can be approximately equalized over the entire length of the rotating body.

従って、回転体の一端側と他端側との間で表面温度に大
きな温度勾配を生ずることがなく、全長に亘って常に均
整な作用を保持せしめることができる。尚、この実施例
では回転体の冷却空気流出側に至るに従ってフィンピッ
チを密にする手段として、長さの異なる複数種類の放熱
フィンを一端をそろえて挿入する方法を採用したが、放
熱フィンを定尺のものとし、該フィンの個数を漸次増大
して順次的に挿入する方法を採用しても良い。
Therefore, no large temperature gradient occurs in the surface temperature between one end and the other end of the rotating body, and a uniform action can always be maintained over the entire length. In this embodiment, as a means of increasing the fin pitch toward the cooling air outflow side of the rotating body, a method was adopted in which multiple types of heat dissipation fins of different lengths were inserted with one end aligned. Alternatively, a method may be adopted in which the fins are of a fixed length and the number of fins is gradually increased and sequentially inserted.

以上2つの図示実施例においては、放熱フィン(5)(
5’ )として、遊離部(51)の対向面が相互に断面
コテ状に膨出したものを用いたが、断面円弧状あるいは
その他の形状に膨出遊離したものを用いても良い。また
、放熱効率を更に向上させる目的で、該遊離部(51)
の壁面に更に横断面方向あるいは長さ方向に波付けを施
したものとか、あるいはルーバー状に多数の切起し部を
形成したもの等を用いることも推奨される。
In the above two illustrated embodiments, the radiation fins (5) (
5'), in which the opposing surfaces of the free parts (51) are mutually bulged in a trowel-like cross section, but it is also possible to use a free part (51) in which the opposing surfaces are bulged to have an arcuate cross section or other shapes. In addition, for the purpose of further improving heat dissipation efficiency, the free part (51)
It is also recommended to use a wall with corrugations in the cross-sectional direction or length direction, or a wall with a large number of louver-shaped cut-and-raised portions.

発明の効果 この発明に係る回転体は、前述のような構成を有づるも
のであるから、実施例の参酌によっても明らかであるよ
うに、複写機用の感光ドラムや冷却ローラ等として用い
た場合には内筒(3)にドラム軸、ローラ軸(図示略)
を挿通ずることによってこれを複写機内に容易に軸支し
うる。従って、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せしめることが可
能で、構造の大幅な簡略化をはかりうる。かつ内外筒が
一体成形物であることによって、内19I(3)に通し
たドラム軸、O−ラ軸に対して外筒(2)の中心が自動
的に正確に一致されるため、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
ド等に接触して、これら若しくはドラム表面の感光層を
傷付けたり、冷却O−ラの紙送りの円滑性を妨げる等の
問題を防ぐことができる。
Effects of the Invention Since the rotating body according to the present invention has the above-described configuration, as is clear from consideration of the examples, when used as a photosensitive drum or cooling roller for a copying machine, etc. The inner cylinder (3) has a drum shaft and a roller shaft (not shown).
This can be easily pivoted into a copying machine by inserting it through it. Therefore, unlike conventional products, it is possible to provide rotational support without requiring additional accessories such as a flange body or bearing, and the structure can be significantly simplified. In addition, since the inner and outer cylinders are integrally molded, the center of the outer cylinder (2) is automatically and precisely aligned with the drum shaft and O-ra axis passed through the inner 19I (3), so that the photosensitive drum Do not touch the corona discharger group, developing device, or transfer paper guide, etc., which are arranged close to each other, and damage these or the photosensitive layer on the drum surface, or interfere with the smooth paper feeding of the cooling roller. Problems can be prevented.

また、外筒(2)の内側には放熱フィン(5)−が存在
するのに加えて、内筒(3)と連結する放射状連結リブ
(4)も放熱作用を実現するため、放熱性に優れており
、感光ドラムとして用いると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筒が熱せられて
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ることができ
る。殊に、第1図に示すように、ドラムの一端からファ
ン(9)で風を送って強制空冷を行うことに−より、放
熱作用を愈々促進でき、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う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る。また冷却ロ
ーラとして用いた場合にも、転写紙から奪った熱を次の
転写紙の到来までに確実に放熱しうるため、充分冷却さ
れた状態で転写紙を複写機外へ送りだすことが可能とな
る。
In addition, in addition to the heat dissipation fins (5) on the inside of the outer cylinder (2), the radial connecting ribs (4) that connect with the inner cylinder (3) also achieve a heat dissipation effect. Excellent, and when used as a photosensitive drum, discharge by a corona discharger,
Furthermore, even if the outer cylinder is heated by the irradiation of light from the lamp, the heat is quickly dissipated and overheating does not occur, and the rotation speed of the drum can be increased to increase the speed. In particular, as shown in FIG. 1, by blowing air from one end of the drum with a fan (9) to perform forced air cooling, the heat dissipation effect can be easily promoted. Even in the case where the transferred image is fixed on the transfer paper by heat-fixing row on the circumferential surface of the drum, the temperature of the heated outer circumferential surface of the drum must be sufficiently raised before it reaches the charging section. This makes it possible to lower the temperature to a required low temperature, which is extremely effective in further downsizing copying machines. Also, when used as a cooling roller, the heat removed from the transfer paper can be reliably dissipated before the arrival of the next transfer paper, making it possible to send the transfer paper out of the copying machine in a sufficiently cooled state. Become.

また、放熱フィンは内外両筒間に挿入設置されるもので
あるから、本体とめ一体成形による場合と異なり、放熱
フィンの設置枚数、長さ等を使用条件等に応じて容易に
設定でき、例えば回転体表面の温度のバラツキをなくす
というような適正な放熱作用の確保が可能となる。
In addition, since the heat dissipation fins are inserted and installed between the inner and outer cylinders, unlike the case where they are integrally molded with the main body, the number of heat dissipation fins installed, their length, etc. can be easily set according to the usage conditions, etc. It is possible to ensure proper heat dissipation by eliminating variations in temperature on the surface of the rotating body.

しかもこの発明では、放熱フィンが、中間部を互いに分
離した遊離部とし、両側縁部を重なり状の重合部に形成
したものであるから、遊離部においては帯状薄板からな
る放熱フィンを2枚設置したのと同等の放熱効果が得ら
れることとなり、フィン密度を増大しえてフィンの放熱
面積を限られたスペース内で大きく確保することができ
、放熱性能のより一層の向上を実現しうる。しかも、帯
状板を幅の中央部より2つ折状に折曲して該放熱フィン
を製作するものであるから、製作を簡易に行いうる。
Moreover, in this invention, since the heat dissipation fin has a free part separated from each other in the middle part and an overlapping part on both sides, two heat dissipation fins made of thin strips are installed in the free part. As a result, the same heat dissipation effect can be obtained, the fin density can be increased, and a large heat dissipation area of the fins can be ensured within a limited space, and the heat dissipation performance can be further improved. Moreover, since the radiation fins are manufactured by folding the band-shaped plate into two from the center of its width, manufacturing can be performed easily.

この発明は上述の次第で、極めて簡単な構成にして、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同題を回避しうるのはもとよ
り、その脱着操作も簡易に行いえて、複写機用感光ドラ
ム、冷却ローラとして好適な回転体となしうる。また、
外筒に一体成形す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、良好な機能を保′持すると共に、感光ドラムや冷却
ローラ自体としての小型化への寄与に加えて、感光ドラ
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、複写機の小型化に大きく貢献を果しうる
顕著な効果を奏する。
As described above, this invention has an extremely simple structure, enables accurate setting and placement of the center of rotation, and not only avoids troubles caused by eccentric rotation, but also simplifies attachment and detachment operations. The rotating body can be used as a photosensitive drum or cooling roller for a copying machine. Also,
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. In addition to maintaining good functionality and contributing to the miniaturization of the photosensitive drum and cooling roller themselves, this technology heats and fixes the toner on the transfer paper around the photosensitive drum. This, together with the fact that it is possible to simplify the fixing mechanism by tightening the fixing mechanism, brings about a remarkable effect that can greatly contribute to the miniaturization of copying machines.

【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図におけるI−II線断面図、第3図(a 
)〜(C)は放熱フィンの製作過程を示す斜視図、第4
図はこの発明の他の実施例を示す一部切欠ぎ斜視図、第
5図ないし第7 図ハm 4 FgJ V −V線、■
−vt線、vi −VI[117)各断面図である。 (1)・・・本体、(2)・・・外筒、(3)・・・内
筒、(4)・・・連結リブ、<5)(5’ )・・・放
熱フィン、(51)・・・遊IL(52)・・・重合縁
部。 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 line I-II in FIG. 1, and FIG.
) to (C) are perspective views showing the manufacturing process of the heat dissipation fins.
The figures are partially cutaway perspective views showing other embodiments of the present invention;
-vt line, vi-VI [117] each cross-sectional view. (1) Main body, (2) Outer cylinder, (3) Inner cylinder, (4) Connecting rib, <5) (5') Radiation fin, (51 )...Free IL (52)...Overlapping edge. that's all

Claims (3)

【特許請求の範囲】[Claims] (1)軸受用内筒と、外筒とが複数個の放射状連結リブ
を介して同心に一体成形された本体と、帯状板を幅の中
央部より2つ折状に折曲して先端部を合掌せしめること
により、中間部を互いに分離した遊離部とし、両側縁部
を重なり状の重合縁部に形成したフィンとからなり、該
フィンが前記本体の内外両筒間に、隣接する各放射状連
結リブ間の位置において、軸線方向に沿つて挿入されか
つ接合固定されてなることを特徴とする電子複写機用感
光ドラムなどに適した回転体。
(1) A main body in which an inner cylinder for a bearing and an outer cylinder are integrally molded concentrically via a plurality of radial connecting ribs, and a belt-shaped plate is bent in half from the center of the width to form a tip. By pressing the palms together, the middle part is a free part separated from each other, and both side edges are formed into overlapped overlapping edges. A rotating body suitable for a photosensitive drum for an electronic copying machine, etc., characterized in that it is inserted along the axial direction and bonded and fixed at a position between ribs.
(2)放熱フィンのフィンピッチが、本体の軸線方向に
おける冷却空気流入側の一端から他端に至るに従って漸
次段階的に密に構成されてな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などに適した回転体。
(2) The electronic copying machine according to claim 1, wherein the fin pitch of the radiation fins is gradually increased in density from one end on the cooling air inflow side to the other end in the axial direction of the main body. A rotating body suitable for photosensitive drums, etc.
(3)放熱フィンが内外両筒に対向状に形成された細溝
に両側の重合縁部をはめ込まれ、かつろう付けにより該
内外両筒に接合されてなる特許請求の範囲第1項または
第2項記載の電子複写機用感光ドラムなどに適した回転
体。
(3) The heat dissipation fin has overlapping edges on both sides fitted into thin grooves formed oppositely in both the inner and outer cylinders, and is joined to the inner and outer cylinders by brazing. A rotating body suitable for a photosensitive drum for an electronic copying machine as described in item 2.
JP60038379A 1985-02-26 1985-02-26 Rotating body suitable to photosensitive drum for electrophotographic copying machine Pending JPS61196278A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60038379A JPS61196278A (en) 1985-02-26 1985-02-26 Rotating body suitable to photosensitive drum for electrophotographic copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60038379A JPS61196278A (en) 1985-02-26 1985-02-26 Rotating body suitable to photosensitive drum for electrophotographic copying machine

Publications (1)

Publication Number Publication Date
JPS61196278A true JPS61196278A (en) 1986-08-30

Family

ID=12523639

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60038379A Pending JPS61196278A (en) 1985-02-26 1985-02-26 Rotating body suitable to photosensitive drum for electrophotographic copying machine

Country Status (1)

Country Link
JP (1) JPS61196278A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012509180A (en) * 2008-11-21 2012-04-19 エムエーツェー レーザーテック アーゲー Cell-type wheel manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012509180A (en) * 2008-11-21 2012-04-19 エムエーツェー レーザーテック アーゲー Cell-type wheel manufacturing method

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