JPS61186136A - Rotary body suitable for photosensitive drum for electronic copying machine - Google Patents

Rotary body suitable for photosensitive drum for electronic copying machine

Info

Publication number
JPS61186136A
JPS61186136A JP2732985A JP2732985A JPS61186136A JP S61186136 A JPS61186136 A JP S61186136A JP 2732985 A JP2732985 A JP 2732985A JP 2732985 A JP2732985 A JP 2732985A JP S61186136 A JPS61186136 A JP S61186136A
Authority
JP
Japan
Prior art keywords
cylinder
fins
rotating body
copying machine
contact
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
JP2732985A
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 JP2732985A priority Critical patent/JPS61186136A/en
Publication of JPS61186136A publication Critical patent/JPS61186136A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To enable the bearing simply and correctly and to make the attachment and detachment easy by constituting that the tubular inner cylinder to become a bearing is integrally formed via plural radial connection ribs on the inner part of the outer cylinder. CONSTITUTION:The outer cylinder 1 and inner cylinder 2 are integrally connected each other by plural radial connection ribs 3. The forming body consisting of such inner and outer double cylinders is easily produced by extrusion forming. Plural radiating fins 4 are respectively inserted from one end in the axial line direction at the position between the adjacent radial connection ribs 3, 3 into the space between the inner and outer cylinders 2, 1 and joined and fixed. The cross section of the radiating fin 4 is formed in V shape and the folded side edge comes into contact with the outer face of the inner cylinder 2 under the condition of inserted setup and the outer part side edges of both blade late parts are brought into contact with the inner face of the outer cylinder 1.

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ラ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 roller for cooling and feeding transfer paper.

従来の技術 従来、この種の感光ドラムや冷N10−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回転体と一体化すると
ともに、フ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, a hollow cylindrical rotating body made of metal such as aluminum has been used as this type of photosensitive drum or cold N10-ra. In order to rotationally support this, a pair of separately formed flange members was applied to both ends of the rotating body, and these were fastened with a plurality of fastening bolts to be integrated with the rotating body, and the flange members were attached to the flange members. It is designed to be removably supported on a drum shaft or roller 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や冷却O−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スト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, in the conventional photosensitive drums and cooling rollers as described above, in addition to the rotating body, a pair of flanges, bearings, etc. are separately required to support the rotating body. Not only does the number of parts increase and the structure becomes more complex, resulting in higher costs, for example, when it becomes necessary to replace the rotating body due to fatigue or damage to the photoconductor, it requires complicated procedures to attach and detach it, resulting in a large number of problems. It had the disadvantage of being time consuming.

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
ローうでは、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環条を生じ易く、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(プ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 rows, the heat dissipation of the rotating bodies that make up the drums is poor, and combined with the tendency for the surface area to decrease due to the miniaturization of the drums themselves, photosensitive drums have a corona discharger. Problems include the tendency for overheating rings to occur on the drum due to heating by lamps or lamps, the charging performance of the photoreceptor being significantly reduced, or the toner melting on the drum surface, impeding good transfer to copy paper. On the other hand, in the case of the cooling roller, the amount of heat stored in the roller increases due to a decrease in the 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.

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5
6−120566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、所期するような
冷却効果を実現しうるちのではなかった。
In order to improve the heat dissipation properties of photosensitive drums and cooling rollers, proposals have already been made to integrally form protrusions that act as heat dissipation fins on the inner surface of the rotating body (for example, in Japanese Patent Application Laid-Open No. 1983-1993). -103358 Publication, Utility Model No. 5
However, there is a limit to the number of integrally molded fins that can be increased, and it has not been possible to achieve the desired cooling effect.

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、回転体の一端から
風を送り込んで冷却を促進する場合に、回転体の長さ方
向の一端部と他端部との間で温度勾配を生ずることなく
、表面温度を全長にわたって可及的均一に低下せしめう
るものとなすこと、また、第3には、製作を可及的簡易
に行いうるちのとなすこと、更に第4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, when blowing air from one end of the rotating body to promote cooling, the surface temperature of the rotating body must be sufficiently lowered. Third, the surface temperature can be lowered as uniformly as possible over the entire length without creating a temperature gradient between one end and the other end. Fourthly, we simplified the supporting structure for the drum shaft, etc., and made it easy to attach and detach it, and also made the center of the rotating body to be the center of the drum shaft, etc. The object of the present invention is to provide a device that can be accurately aligned with the rotation center and that there is no risk of deviation from the center of rotation and errors.

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、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、軸線り向に沿
って断面V字状の放熱フィンを挿入し設置することによ
り、回転体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、上記放熱フィンに長さの異なる複
数種類のものを用いることにより、フィンピッチを回転
体の冷却空気流入側の一端から他端に至るに従って漸次
段階的に密に構成し、回転体の長さ方向における表面温
度の温度勾配を少なくするようにしたちのである。
Means for Solving the Problems In order to achieve the above-mentioned object, the present invention incorporates a rotating body into an outer cylinder which serves as a support for a photosensitive layer or a transport support for a transfer paper, and a bearing as a bearing. By integrally molding the tubular inner cylinder with a plurality of radial connecting ribs, it is possible to insert a drum shaft or the like into the inner cylinder and easily and accurately support it. It is made of urethane material so that it can be easily attached and detached. In addition, by inserting and installing heat dissipation fins with a V-shaped cross section along the axial direction between the above-mentioned inner and outer cylinders, sufficient heat dissipation can be achieved by using a means to promote forced air cooling using a fan from one end of the rotating body. Ensure that a promoting effect is obtained. Furthermore, by using multiple types of heat dissipation fins with different lengths, the fin pitch can be made denser in stages from one end of the cooling air inflow side of the rotating body to the other end. This is to reduce the temperature gradient in the surface temperature in the length direction.

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るとともに、
上記内外両筒間に、隣接する各放射状連結リブ間の位置
において、それぞれ1ないし複数個の横断面V字状の放
熱フィンが、折返し側縁を前記内筒の外周面に当接され
両翼板部の外方側縁を前記外筒の内面に当接せしめた状
態にして軸線方向に挿入され、かつ上記当接部を一体的
に接合固定されてなり、しかも該放熱フィンは互いに長
さを異にした複数種類のものを含むことによって、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
って漸次段階的にフィンピッチが密に構成されてなるこ
とを特徴とする電子複写機用感光ドラムなどに適した回
転体を要旨とするものである。
That is, in the present invention, the inner cylinder for a bearing and the outer cylinder are integrally molded concentrically via a plurality of radial connecting ribs, and
Between the inner and outer cylinders, one or more heat dissipating fins each having a V-shaped cross section are arranged between the adjacent radial connecting ribs, and the folded side edges are brought into contact with the outer circumferential surface of the inner cylinder. The radiating fins are inserted in the axial direction with the outer side edges of the fins in contact with the inner surface of the outer cylinder, and the abutting parts are integrally joined and fixed, and the heat radiation fins have lengths that are equal to each other. A photosensitive material for an electronic copying machine, characterized in that by including a plurality of different types of fins, the fin pitch is gradually denser from one end to the other end on the cooling air inlet side in the axial direction. The gist is a rotating body suitable for drums, etc.

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であり、(2)はこれの
内部に同心に設けられた軸受用の内筒である。これら両
筒(1)(2)は複数本の放射状連結リブ(3)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 Figures 1 and 2, (1) is an outer cylinder on which a photosensitive layer is formed in the case of a photosensitive drum, and serves as a support and conveyance section for transfer paper in the case of a cooling roller, and (2) is an outer cylinder on which a photosensitive layer is formed on the surface. This is an inner cylinder for a bearing provided concentrically inside this. These two cylinders (1) and (2) are integrally connected to each other by a plurality of radial connecting ribs (3). 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(1)は、強度、重量、放熱性等の関係
で、肉厚を2〜4mmPi!度に形成するのが右利金あ
る。また、図示実施例において、放射状連結リブ(3)
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 particular, the outer cylinder (1) has a wall thickness of 2 to 4 mm Pi due to strength, weight, heat dissipation, etc. There is a right interest rate that is formed every time. In addition, in the illustrated embodiment, the radial connecting rib (3)
Although four are shown as being provided at equal intervals, any number may be provided as long as it is two or more, and the number is generally set arbitrarily within the range of about eight.

上記内外両筒(2)(1)間には、隣接する放射状連結
リブ(3)(3)間の位置において、それぞれ複数個の
放熱フィン(4)が軸線方向に一端から挿入されかつ接
合固定されている。
Between the inner and outer cylinders (2) and (1), a plurality of heat dissipation fins (4) are inserted from one end in the axial direction at positions between the adjacent radial connecting ribs (3) and fixed together. has been done.

該放熱フィン(4)は、内外両筒(2)(1)間の距離
、即ち連結リブ(3)の高さに対応する幅をもって横断
面V字状に形成されたものであり、従って上記の挿入設
置状態において折返し側縁(41)が内筒〈2)の外面
に当接せられ、両翼板部(42)  <42)の外方側
縁が外筒(1)の内面に当接ぜられている。かつ、この
放熱フィン(4)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(2)(1)には対向状
にそれぞれ多数条の細Fr(5)(6)が設けられてお
り、これらに放熱フィン(4)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(4)の
上記接合固定は、放熱フィン(4)にアルミニウムブレ
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(1)及び内筒(2)
にろう付け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。
The radiation fins (4) are formed in a V-shaped cross section with a width corresponding to the distance between the inner and outer cylinders (2) and (1), that is, the height of the connecting rib (3). In the inserted and installed state, the folded side edge (41) is in contact with the outer surface of the inner tube (2), and the outer side edges of both wing plates (42) (42) are in contact with the inner surface of the outer tube (1). is being lost. In addition, in order to facilitate the insertion operation of this radiation fin (4) and to correctly position it, a large number of thin Fr (5) and (6) are provided in opposing directions in both the inner and outer cylinders (2) and (1), respectively. The side edges of the radiation fins (4) are fitted into these. In addition, the above-mentioned bonding and fixing of the heat dissipation fins (4) is achieved by using an aluminum brazing sheet for the heat dissipation fins (4), and by melting the skin material (brazing material) of the heat dissipation fins (4), the outer cylinder (1) and the inner cylinder (2)
The simplest and most common method is to join by brazing. In this embodiment, the heat dissipation fins are also bonded and fixed using this method.

ところで、上記の放熱フィン〈4)は、互いに長さを異
にした複数種類のものを含む。叩ら、第2図に示すよう
に、ドラムの略全長に対応する長さの最も長い第1フイ
ン(4a)と、これより長さを所定距離短くした第2フ
イン(4b)と、更にこれより長さの短い第3フイン〈
4C)とを含む。そして、長さの長い第1フイン(4a
)は、隣接の各連結リブ(3)(3)間において、それ
らの中央部にそれぞれ1個づつ挿入設置され、第2フイ
ン(4b)は、一端を上記第1フイン(4a)の一端に
揃えて該第1フインの両側に2枚づつ挿入設置され、更
に第3フイン(4C)は、同じく一端を上記に揃えて、
第1フイン(4a)と第2フイン(4b)との間に各1
枚づつ挿入設置されている。従って、第1図に示すよう
に回転体の一端に臨んで配置される冷却用ファン(7)
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(4)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3図
ないし第5図に示すように、回転体の全長のうち、上記
一端側の約1/3程度の長さ範囲では、第5図に示すよ
うに第1フイン(4a)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程度の良さ範囲では、第
4図に示すように第1及び第2フイン(4a>  (4
b)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3図に示すように第1、第2及び第3フイン
〈4a)(4b)  (4c)が共存して密なフィンピ
ッチに構成されている。
By the way, the above-mentioned heat dissipation fins (4) include a plurality of types having different lengths. As shown in FIG. 2, the first fin (4a) has the longest length corresponding to approximately the entire length of the drum, the second fin (4b) has a length shorter than this by a predetermined distance, and Third fin with shorter length
4C). Then, the long first fin (4a
) are inserted into the center of each of the adjacent connecting ribs (3) (3), and the second fin (4b) has one end attached to one end of the first fin (4a). Two fins are inserted and installed on both sides of the first fin, and the third fin (4C) is also aligned, with one end aligned with the above.
1 each between the first fin (4a) and the second fin (4b)
They are installed one by one. Therefore, as shown in Fig. 1, a cooling fan (7) is placed facing one end of the rotating body.
The pitch of the radiating fins (4) gradually becomes denser from one end on the inlet side of the cooling air to the other end on the outlet side. That is, as shown in FIGS. 3 to 5, in a length range of about 1/3 on the one end side of the entire length of the rotating body, only the first fin (4a) is connected as shown in FIG. As shown in FIG. 4, the first and second fins (4a > (4
When b) coexists and reaches about 1/3 of the length on the other end side, the first, second and third fins (4a) (4b) (4c) are formed as shown in Figure 3. They coexist and are configured with a dense fin pitch.

上記のような長さを異にしたフィンの配列状態は、実施
例に限定されるものではない。従って例えば長短2種類
のフィンのみが用いられることもあるし、4種類以上の
ものが用いられることもある。かつ冷却空気流入側の一
端部には、放熱フィンを全く設けないものとすることも
ある。これらの事項は、回転体の使用条件との関係で設
計的に適宜に決められるものである。
The arrangement of fins having different lengths as described above is not limited to the embodiment. Therefore, for example, only two types of fins, long and short, may be used, or four or more types may be used. In some cases, no radiation fins are provided at one end on the cooling air inflow side. These matters are appropriately determined from a design perspective in relation to the usage conditions of the rotating body.

また、図示実施例の放熱フィン(4)は、その翼板部(
42)がいずれも平板状であるものとして示したが、放
熱効率を更に向上させる目的で、翼板部(42)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 addition, the heat dissipation fin (4) in the illustrated embodiment has a wing plate portion (
42) are all shown as having a flat plate shape, but for the purpose of further improving heat dissipation efficiency, the wing plate portion (42) may be further corrugated in the cross-sectional direction or length direction, or may have a louvered shape. It is also recommended to use a material with many cut and raised portions formed in the shape of a shape.

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するも
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(2)にドラム軸、ローラ軸(図示路)
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7ランジ体や軸受等
の付属部品を要することなく回転束。
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, The drum shaft and roller shaft (path shown) are installed in the inner cylinder (2).
This can be easily pivoted into a copying machine by inserting it through it. Therefore, unlike conventional products, there is no need for separate 7-lunge bodies, bearings, or other accessory parts, allowing for a rotating bundle.

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
筒(2)に通したドラム軸、ローラ軸に対して外筒(1
)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、放熱ローラの紙送りの円滑
性を妨げる等の問題を防ぐことができる。
The structure can be greatly simplified. In addition, since the inner and outer cylinders are integrally molded, the outer cylinder (1
) is automatically and accurately aligned, so there is no possibility of contacting the corona discharger group, developing device, or transfer paper guide, etc. placed close to the photosensitive drum, and damaging these or the photosensitive layer on the drum surface. It is possible to prevent problems such as interference with the smoothness of paper feeding by the heat dissipation roller.

また、外筒(1)の内側にはこれに接触してV字形放熱
フィン(4)の薄い響板部(4b)が存在づるのに加え
て、内筒(2)と連結する放飼状連結リブ(3)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(7)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。また放熱ローラとして用い
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, there is a thin soundboard part (4b) of the V-shaped heat dissipation fin (4) inside the outer cylinder (1) in contact with the outer cylinder (1). The connecting ribs (3) also have excellent heat dissipation properties, and when used as a photosensitive drum, even if the outer cylinder is heated due to discharge from a corona discharger or irradiation with light from a lamp, Heat is dissipated quickly 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 (7) to perform forced air cooling, heat dissipation can be easily promoted. Even in cases where the transferred image on the transfer paper is fixed by heating and fixing rows on the surface, the temperature of the heated outer peripheral surface of the drum must be sufficiently raised to the required temperature before the heated outer peripheral surface of the drum reaches the charging section. This makes it possible to lower the temperature to a low temperature, which is extremely effective in further downsizing copying machines. Also, when used as a heat dissipation 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.

更に、上記ファン(7)による冷却促進作用において、
この発明によるドラムでは、放熱フィンに互いに長さを
異にした複数種類のものを含むことによって、回転体の
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
的にフィンビッヂが密に構成されているから、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。
Furthermore, in the cooling promotion effect by the fan (7),
In the drum according to the present invention, by including a plurality of types of radiation fins having different lengths, the fin fins are gradually formed densely from one end to the other end on the cooling air inflow side of the rotating body. Therefore, the heat dissipation efficiency can be approximately equalized over the entire length.

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イ≧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。
Therefore, it is possible to prevent a large temperature gradient from occurring in the surface temperature between one end and the other end of the rotating body, and to maintain a uniform action over the entire length.

更にまた、上記放熱フィンとして特に断面V字状のフィ
ンが用いられているので、内外両筒(2>(1)間への
フィンの挿入設置作業を容易に行い得て製造上有利であ
る。
Furthermore, since fins having a V-shaped cross section are used as the radiation fins, it is easy to insert and install the fins between the inner and outer cylinders (2>(1)), which is advantageous in manufacturing.

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
トラブルの発生の問題を回避しうるのはもとより、その
pas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到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温度に制御し得て、良好な
機能を保持すると共に、感光ドラムや冷W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 configuration, enables accurate setting and placement of the center of rotation, avoids troubles caused by eccentric rotation, etc., and also facilitates the PAS operation. Moreover, it can be made into a rotating body suitable as a photosensitive drum for a copying machine or a cooling roller. In addition, it is possible to install a large number of heat dissipation fins, which would be impossible if they were integrally molded into the outer cylinder, resulting in extremely excellent heat dissipation performance. There is no risk of troubles caused by overheating, and the surface temperature can be controlled to be approximately uniform over the entire length, maintaining good functionality. This also makes it possible to simplify the fixing mechanism by heating and fixing the toner on the transfer paper around the photosensitive drum, making it possible to greatly contribute to the miniaturization of copying machines. It has a remarkable effect.

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

第1図はこの発明の実施例を示1一部切欠き斜視図、第
2図は放熱フィンの挿入前の状態を示す斜視図、第3図
ないし第5図は第1図m−■線、IV −IV線及びv
−■線の各断面図である。 (1)・・・外筒、(2)・・・内筒、(3)・・・連
結リブ、(4)・・・放熱フィン、(4a)・・・第1
フイン、(4b)・・・第2フイン、(4C)・・・第
3フイン、(41)・・・折返し側縁、<42)・・・
買板部。 以  上
Fig. 1 is a partially cutaway perspective view showing an embodiment of the present invention, Fig. 2 is a perspective view showing the state before the heat dissipation fin is inserted, and Figs. 3 to 5 are line m-■ in Fig. 1. , IV-IV line and v
FIG. (1)...outer cylinder, (2)...inner cylinder, (3)...connecting rib, (4)...radiating fin, (4a)...first
Fin, (4b)...Second fin, (4C)...Third fin, (41)...Folded side edge, <42)...
Buying board department. 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るとともに、上記内外両筒
間に、隣接する各放射状連結リブ間の位置において、そ
れぞれ1ないし複数個の横断面V字状の放熱フィンが、
折返し側縁を前記内筒の外周面に当接され両翼板部の外
方側縁を前記外筒の内面に当接せしめた状態にして軸線
方向に挿入され、かつ上記当接部を一体的に接合固定さ
れてなり、しかも該放熱フィンは互いに長さを異にした
複数種類のものを含むことによって、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
的にフィンピッチが密に構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などに適した回転体。
(1) The inner cylinder for a bearing and the outer cylinder are integrally molded concentrically via a plurality of radial connecting ribs, and between the above-mentioned inner and outer cylinders, there are or a plurality of heat radiation fins with a V-shaped cross section,
It is inserted in the axial direction with the folded side edge in contact with the outer peripheral surface of the inner cylinder and the outer side edges of both wing plate parts in contact with the inner surface of the outer cylinder, and the contact part is integrally inserted. Moreover, by including a plurality of types of radiation fins having different lengths, the fin pitch is gradually increased from one end to the other end on the cooling air inlet side in the axial direction. A rotating body suitable for photosensitive drums for electronic copying machines, which is characterized by a dense structure.
(2)フィンが内外両筒に対向状に形成された細溝に両
側縁をはめ込まれ、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項記載の電子複写機用
感光ドラムなどに適した回転体。
(2) An electronic copying machine according to claim 1, wherein the fins have both side edges fitted into thin grooves formed oppositely in both the inner and outer cylinders, and are joined to the inner and outer cylinders by brazing. A rotating body suitable for photosensitive drums, etc.
(3)放熱フィンにアルミニウムブレージングシートが
用いられ、その皮材によって該フィンが前記内外両筒に
ろう付け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) A photosensitive drum for an electronic copying machine according to claim 1 or 2, wherein an aluminum brazing sheet is used for the radiation fins, and the fins are brazed to both the inner and outer cylinders by means of the skin material. Rotating body suitable for etc.
JP2732985A 1985-02-13 1985-02-13 Rotary body suitable for photosensitive drum for electronic copying machine Pending JPS61186136A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2732985A JPS61186136A (en) 1985-02-13 1985-02-13 Rotary body suitable for photosensitive drum for electronic copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2732985A JPS61186136A (en) 1985-02-13 1985-02-13 Rotary body suitable for photosensitive drum for electronic copying machine

Publications (1)

Publication Number Publication Date
JPS61186136A true JPS61186136A (en) 1986-08-19

Family

ID=12218029

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2732985A Pending JPS61186136A (en) 1985-02-13 1985-02-13 Rotary body suitable for photosensitive drum for electronic copying machine

Country Status (1)

Country Link
JP (1) JPS61186136A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07290176A (en) * 1994-04-21 1995-11-07 Kurimoto Ltd Manufacture of heat exchanger provided with spiral blade

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07290176A (en) * 1994-04-21 1995-11-07 Kurimoto Ltd Manufacture of heat exchanger provided with spiral blade

Similar Documents

Publication Publication Date Title
JPH0123782B2 (en)
JPS61186136A (en) Rotary body suitable for photosensitive drum for electronic copying machine
US7024130B2 (en) Rotating body, cooling apparatus that cools a rotating body, and image forming apparatus that uses a rotating body and a cooling apparatus
JPS61188575A (en) Rotating body suitable for sensitive drum or the like for electronic copying machine
JPS61196278A (en) Rotating body suitable to photosensitive drum for electrophotographic copying machine
JPS6138961A (en) Photosensitive drum for electronic copying machine
JPS6138966A (en) Photosensitive drum for electronic copying machine
JPS61170774A (en) Photosensitive drum for electronic copying machine
JPS6362744B2 (en)
JPS6138964A (en) Photosensitive drum for electronic copying machine
JPS6138960A (en) Photosensitive drum for electronic copying machine
WO2020096649A1 (en) Photo finisher with duct apart from belt
JPS61210384A (en) Rotating body suitable for photosensitive drum of electronic copying machine
JPS6138962A (en) Photosensitive drum for electronic copying machine
JP3245263B2 (en) Image forming device
JPH0123784B2 (en)
US20040234306A1 (en) Fuser roll for xerographic printing having spiral support ribs
JPS6114678A (en) Manufacture of photosensitive drum for electrophotographic copying machine
JP3397934B2 (en) Fixing device
JPS60247280A (en) Photosensitive drum for electrophotographic copying machine
JPH0123785B2 (en)
JP3521997B2 (en) Fixing device
US20070081837A1 (en) Image forming apparatus having pressing roller apparatus
JP2001289578A (en) Heat pipe type heat circulator
JPH0116109Y2 (en)