JPS61188575A - Rotating body suitable for sensitive drum or the like for electronic copying machine - Google Patents

Rotating body suitable for sensitive drum or the like for electronic copying machine

Info

Publication number
JPS61188575A
JPS61188575A JP60029093A JP2909385A JPS61188575A JP S61188575 A JPS61188575 A JP S61188575A JP 60029093 A JP60029093 A JP 60029093A JP 2909385 A JP2909385 A JP 2909385A JP S61188575 A JPS61188575 A JP S61188575A
Authority
JP
Japan
Prior art keywords
rotating body
fins
heat dissipation
fin
body suitable
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
JP60029093A
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 JP60029093A priority Critical patent/JPS61188575A/en
Publication of JPS61188575A publication Critical patent/JPS61188575A/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)
  • Fax Reproducing Arrangements (AREA)

Abstract

PURPOSE:To improve accuracy, detachability, and a cooling ability by simple construction by integrally forming an external cylinder and an internal cylinder to be used as a bearing by radially connecting ribs and inserting radiating fins with a predetermined density between the ribs. CONSTITUTION:An external cylinder 6 and an internal cylinder 5 of a bearing are integrally connected by a number of radial connecting ribs 3. Between these ribs 3, radiating fins 4a, 4b and the like having different length are disposed and the nearer there goes to a cool air flowing out side, the larger a density of a cooling fin becomes. By a simple construction, a rotating body suitable for a sensitive drum and the like has excellent characteristics such as an easiness in detaching, an alignment with a high accuracy with a drum axis, and a cooling feature with high efficiency.

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0−ラとして用いるのに適した
回軟′□体に関する。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a flexible body suitable for use as a cooling roller for cooling and feeding an electrostatic photosensitive drum or transfer paper in an electronic copying machine.

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。キ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。
Conventional Technology Conventionally, a hollow cylindrical rotating body made of metal such as aluminum has been used as this type of photosensitive drum or cooling roller. In order to rotationally support the rotating body, a pair of separately formed flange members is applied to both ends of the rotating body, and these are fastened with a plurality of fastening bolts to integrate with the rotating body. 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却ローラで
は、回転体のほかに、これを軸支するために1対の7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(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 7 flanges, bearings, etc. are separately required to support the rotary body, so parts are required. The number of points increases, the structure becomes complicated, and costs increase (not only that, but when it becomes necessary to replace the rotating body due to fatigue or damage to the photoreceptor, for example, it requires complicated procedures to attach and detach it, resulting in a large number of costs). 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7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 7 flange section and a 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明言するというような
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 a significant drop in the charging performance of the photoreceptor, or the toner melts on the drum surface, resulting in problems such as 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する提案が既になさ株てい
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 of photosensitive drums and cooling rollers, there have already been proposals 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. 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局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、1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、更に第3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. That is, firstly, by significantly increasing the heat dissipation of the rotating body, an electrostatic latent image can be formed by rotation even when, for example, a heating fixing roll is brought into contact with a part of the surface of the photosensitive drum. The surface temperature must be sufficiently lowered during the process up to the charged part.Secondly, when blowing air from one end of the rotating body to promote cooling, it is necessary to Thirdly, 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. The support structure has been simplified, and it can be easily attached and detached, and the center of the rotating body can be accurately aligned with the center of the drum shaft, etc., and there is no risk of deviation from the center of rotation and errors. The purpose is to make it a reality.

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
、軸線方向に沿って断面V字状の、あるいは帯状の放熱
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、
冷却空気流入側の一端部にフィンの非挿入部を所定長さ
に形成し、かつフィンピッチを回転体の冷却空気流出側
に至るに従って漸次段階的に密に構成して、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
したものである。
In order to achieve the above-mentioned object as a means for solving the problems, the present invention provides a rotating body with a bearing inside an outer cylinder that serves as a support for a photosensitive layer or a transport support for transfer paper. There are multiple tubular inner cylinders,
By integrally molding the inner cylinder through the radial connecting ribs, it is possible to insert a drum shaft or the like into the inner cylinder and easily and accurately support it, and also to easily attach and detach it. do. In addition, by inserting and installing a heat dissipation fin with a V-shaped cross section or a band shape along the axial direction between the above-mentioned inner and outer cylinders, it is possible to , to obtain sufficient heat dissipation promotion effect.Furthermore,
A non-inserted portion of the fin is formed to a predetermined length at one end of the cooling air inflow side, and the fin pitch is gradually made denser as it approaches the cooling air outflow side of the rotating body, thereby increasing the length of the rotating body. This is to reduce the temperature gradient of the surface temperature in the 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りプ間の位置
において、それぞれ1ないし複数個の放熱フィンが、冷
却空気流入側の一端部における所定長さ範囲を除いて軸
線方向に挿入されかつ固定されてお゛す、しかも該放熱
フィンは冷却空気流出側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]ミ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
One or more heat dissipation fins are inserted in the axial direction between the inner and outer cylinders at positions between adjacent radial connecting loops, except for a predetermined length range at one end on the cooling air inflow side. The radiator fins are fixed in position, and the radiating fins have a progressively denser fin pitch as they reach the cooling air outflow side. The body is the gist.

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。
Embodiment □ Hereinafter, embodiments 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、例えばアルミニらム合金の押出
し成形により、容易に製作することができるものである
。なお、特に外筒(1)は、強度、重量、放熱性等の関
係で、肉厚を′2〜41m程度に□形成するのが有利で
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6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 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 having double inner and outer cylinders can be easily manufactured by extrusion molding of an aluminum alloy, for example. In particular, it is advantageous for the outer cylinder (1) to have a wall thickness of about 2 to 41 m in terms of strength, weight, heat dissipation, etc. In addition, in the illustrated embodiment, radial connecting ribs (3
) is shown in which 6 pieces are provided at equal intervals, but any number of pieces may be provided as long as it is 2 or more, and is generally set arbitrarily within the range of about 8 pieces.

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、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にお
ける全長の約1/3程度の長さ範囲を除いて、軸線方向
に挿入されかつ接合固定されている。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WJ (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
)の内面に当接せられている。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←、内外両筒(2)(1)には対向状にそれぞれ
多数条の細溝(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(1)及び内筒(2)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。勿論かかる方法によらなくと
も良く、また使用状況によっては接合することなく挿入
固定状態のままでも良い。
Between the inner and outer cylinders (2) (1), a plurality of heat dissipation fins (4) are arranged facing one end of the rotating body at positions between the adjacent radial connecting ribs (3) (3). The cooling fan (7) is inserted in the axial direction and is joined and fixed except for a length range of about ⅓ of the total length at one end on the side where cooling air flows in from the cooling fan (7). The heat dissipation fin (4
) is the distance between the inner and outer cylinders (2) and (1), that is, the connecting rib (
3) is formed in a V-shaped cross section with a width corresponding to the height of WJ (2), and therefore, in the above-mentioned insertion and installation state, the folded side edge (41) is brought into contact with the outer surface of the inner WJ (2>), Both wing plate parts (42) The outer side edges of (42) are connected to the outer cylinder (1
) is in contact with the inner surface of the In addition, in order to facilitate the insertion of the heat dissipation fins (4) and position them correctly, the inner and outer cylinders (2) and (1) are provided with a large number of thin grooves (5) and (6) facing each other. are provided, and the above-mentioned both side edges of the heat dissipation fin (4) are fitted into these.Furthermore, the above-mentioned bonding and fixing of the heat dissipation fin (4) is performed by attaching aluminum plating to the heat dissipation fin (4). By using a sheet, the simplest and most common method is to melt the skin material (brazing material) and braze the edges on both sides to the outer cylinder (1) and inner cylinder (2).・Yes. In this embodiment, the heat dissipation fins are bonded and fixed using this method.Of course, this method does not have to be used, and depending on the usage situation, the heat dissipation fins may be inserted and fixed without being bonded. .

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。即ち、第2図に示す
ように、ドラムの全長の約2/3に対応する長さの長い
第1フイン(4a)と、これより長さの短い第2フイン
(4b)とを含む。
By the way, the above-mentioned heat dissipation fins (4) include a plurality of types having different lengths. That is, as shown in FIG. 2, the drum includes a first fin (4a) having a long length corresponding to about 2/3 of the total length of the drum, and a second fin (4b) having a shorter length.

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2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2枚の第1
フインを挾むかたちで2枚づつ挿入設置されている。従
って、回転体の一端に臨んで配置される冷却用ファン(
7)からの冷却空気流出側に至るに従って、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程度までの
長さ範囲では、第5図に示すようにフィンの存在はなく
、中間部の約173程度の長さ範囲では、第4図に示す
ように第1フイン(4a)のみが存在し、更に他端側の
IP!l/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フイン(4a) (4b)が共存して密
なフィンピッチに構成されている。
Two long first fins (4a) are inserted into the center of each of the adjacent connecting ribs (3) (3), and the second fins (4b) are inserted at one end. Align the two first fins (4a) with one end of the first fin (4a).
Two pieces are inserted between each fin. Therefore, a cooling fan (
The pitch of the heat dissipating fins (4) becomes gradually denser as it reaches the cooling air outflow side from the cooling air outlet (7). That is, as shown in FIGS. 3 to 5,
Of the total length of the rotating body, there are no fins in the length range up to about 1/3 of the one end side, as shown in FIG. As shown in the figure, only the first fin (4a) exists, and the IP on the other end side! When the length range is about 1/3, the first and second fins (4a) and (4b) coexist to form a dense fin pitch, as shown in FIG.

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3種類の艮
ざのフィンが轡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。ここで、前記のように、回
転体における冷却空気流入側の一端部に所定長さ範囲の
フィンの非挿入部(8)を形成し、かつ冷却空気流出側
に至るに従ってフィンピッチを密にしたのは、冷却空気
の温度上昇に因る冷却効率の漸次的な低下を是正して、
回転体の良さ方向における各部の放熱量を均一化し、ひ
いては回転体の表面温度のバラツキをなくすためである
The arrangement of fins having different lengths as described above is not limited to the embodiment. Therefore, for example, three types of fins may be used, or four or more types may be used. Here, as described above, a fin non-insertion part (8) of a predetermined length range is formed at one end of the cooling air inflow side of the rotating body, and the fin pitch is made denser toward the cooling air outflow side. This is to correct the gradual decline in cooling efficiency due to the rise in the temperature of the cooling air.
This is to equalize the amount of heat dissipated from each part in the longitudinal direction of the rotating body, and to eliminate variations in the surface temperature of the rotating body.

このような放熱フィンの非挿入部(8)の形成範囲、フ
ィンピッチの粗密の程度等は、回転体の使用条件との関
係で設計的に適宜決められるものであるが、特にフィン
の非挿入部(8)は、一般的には回転体の全長の1/2
以下の長さ範囲に形成されるのが効果的であり好ましく
、また1/3程度以上とするのが好ましい。
The formation range of such non-inserted portions (8) of heat dissipating fins, the degree of coarseness of the fin pitch, etc. are determined appropriately from a design perspective in relation to the usage conditions of the rotating body. Part (8) is generally 1/2 of the total length of the rotating body.
It is effective and preferable to form the length in the following range, and it is preferable to form the length in the following range.

上記実施例では、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、第6図に示すように、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。すなわち、第6図において
、回転体の内外両筒(2’ )(1’ )@には、隣接
する放射状リブ(3’ )(3’ )関の位置において
、冷却用ファン(7′)からの冷却空気流入側における
全長の約173程度の長さ範囲を除いて、断面V字状の
放熱フィン(4′)が挿入されている。この放熱フィン
(4′)は、いずれも回転体の長さの略1/3程度の長
さに形成されたものであり、而して該放□熱フィンが、
回転体の中間部では各連結リブ(3’ )(3’ )間
に2個づつ挿入設置され、回転体の他端側ではそれが4
個づつ挿入設置されている。従って、第6図に示すよう
に、冷却空気流入側の一端部にフィンの非挿入部(8′
)が形成され、同出口側に至るに従うて、放熱フィン(
4′)のピッチが段階的に漸次密に構成されたものとな
されている。
In the above 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. As shown in FIG. 2, a method may be adopted in which the heat dissipation fins are of a fixed length, the number of the fins is gradually increased, and the fins are sequentially inserted. That is, in Fig. 6, both the inner and outer cylinders (2') (1') of the rotating body are connected to the cooling fan (7') at the positions of the adjacent radial ribs (3') (3'). A radiation fin (4') having a V-shaped cross section is inserted except for a length range of about 173 out of the total length on the cooling air inflow side. Each of the heat radiation fins (4') is formed to have a length of approximately 1/3 of the length of the rotating body, and the heat radiation fins (4') are
In the middle part of the rotating body, two connecting ribs (3') (3') are inserted and installed, and at the other end of the rotating body, there are four
They are installed one by one. Therefore, as shown in FIG. 6, the fin non-insertion portion (8'
) is formed, and as it reaches the exit side, heat dissipation fins (
4') is configured such that the pitch is gradually denser.

なお、この実施例においても、第1図〜第5図に示した
実施例と同様に、フィンの長さ、フィンの非挿入部(8
′ )の長さ、フィンの配列状態等は図示のものに限定
されるものではない。
In addition, in this embodiment as well, the length of the fin and the non-insertion part (8
' ), the arrangement of the fins, etc. are not limited to those shown in the drawings.

上記の2つの実施例においては、放熱フィンとして断面
V字状のものを用いたが、これにかえて帯状薄板からな
るフィンを用いても良い。
In the above two embodiments, heat dissipation fins having a V-shaped cross section are used, but instead of this, fins made of strip-shaped thin plates may be used.

また、フィンの興板部(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
、肩板・部(42)、あるいは帯状薄板からなるフィン
を用いる場合には該フィン自体に、”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, although the plate portions (42) of the fins are shown as being flat plate-shaped, in order to further improve heat dissipation efficiency, when using fins made of shoulder plate portions (42) or strip-shaped thin plates, It is also recommended that the fins themselves be wavy in the cross-sectional direction or lengthwise direction, or have many louver-shaped cut and raised portions formed therein.

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、口、−ラ軸(因示略
)を挿通す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(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、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, can be easily supported in a copying machine by inserting the drum shaft, opening and -ra shaft (not shown) into the inner cylinder (2). Therefore, unlike conventional products, additional parts such as 7 langes and bearings are not required (it can be rotatably supported, and the structure can be greatly simplified. In addition, the inner and outer cylinders are integrally molded. As a result, the center of the outer cylinder (1) is automatically and accurately aligned with the drum shaft and roller axis passed through the inner cylinder (2), so that a group of corona dischargers arranged close to each other around the photosensitive drum, It is possible to prevent problems such as contacting the developing device or the transfer paper guide and damaging the photosensitive layer on the surface of these or the drum, or interfering with the smoothness of paper feeding by the cooling roller.

また、外筒(1)の内側には一端部を除いて放熱フィン
(4)が存在するのに加えて、内筒(2)と連結する放
射状連結リブ(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
In addition, in addition to the heat dissipation fins (4) existing inside the outer cylinder (1) except for one end, the radial connecting ribs (3) that connect with the inner cylinder (2) also achieve a heat dissipation effect. It has 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 even 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. 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. Transfer □ Even in the case where the transferred image is fixed on the paper by heating and fixing on the surface, the temperature of the heated outer peripheral surface of the drum must be sufficiently high before it 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.

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。
Also, when used as a cooling roller, the heat taken from the transfer paper can be reliably dissipated before the arrival of the next transfer paper.
It becomes possible to send the transfer paper out of the copying machine in a sufficiently cooled state.

更に、上記ファン(7)による冷却促進作用において、
この発明による回転体では、ファンからの冷却空気流入
側の一端部に、所定長さ範囲に放熱フィン非挿入部が形
成され、かつフィンの挿入部分においても他端側に至る
に従ってフィンピッチ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。従って、回転体の一端側と他端側との間で表WJ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。
Furthermore, in the cooling promotion effect by the fan (7),
In the rotating body according to the present invention, a radiation fin non-insertion part is formed in a predetermined length range at one end on the side where cooling air flows in from the fan, and the fin pitch becomes closer to the other end in the fin insertion part. Therefore, the heat dissipation efficiency can be approximately equalized over the entire length in the longitudinal direction. Therefore, a large temperature gradient does not occur in the surface WJ temperature between one end and the other end of the rotating body, and a uniform action can always be maintained over the entire length.

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!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
筒に一体成形する動台には列置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ることによって、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
、かつ全長に亘り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、感光ドラムや冷却a−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つる顕著な効
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 eliminates problems caused by eccentric rotation. Not only that, but it can also be easily attached and detached, and can be used as a rotating body suitable for use 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 on the moving base that is integrally molded into the outer cylinder, which is impossible to arrange in rows, and it has extremely excellent heat dissipation performance, allowing continuous use for long periods of time. However, there is no risk of trouble caused by overheating, and the surface temperature can be controlled to be approximately uniform over the entire length, maintaining good functionality, and making it possible to miniaturize the photosensitive drum or the cooling a-ra itself. In addition to this, it also made it possible to simplify the fixing mechanism by heating and fixing the toner on the transfer paper around the photosensitive drum, making a major contribution to the miniaturization of copying machines. It produces 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す一部切欠き斜視図、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■−ILIV−□■線及びv=v
線の各断面図、第6図はこの発明の−の実−iを示す一
部切欠き斜視図である。 (1)(1’  )・=−1外筒、(2)(2’  )
・・・内筒、(3)(3’ )−・・連結リブ、(4)
(4”)・・・放熱フィン、(8)(8’ )・・・非
挿入部。 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 Fig. 1 ■-ILIV-□ ■Line and v=v
Each cross-sectional view of the line and FIG. 6 are partially cutaway perspective views showing the -i of the present invention. (1) (1')・=-1 outer cylinder, (2) (2')
... Inner cylinder, (3) (3') - ... Connection rib, (4)
(4”)...Radiation fin, (8) (8')...Non-insertion part.

Claims (4)

【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ないし複数個の放熱フィンが、冷却空気流入側
の一端部における所定長さ範囲を除いて軸線方向に挿入
されかつ固定されており、しかも該放熱フィンは冷却空
気流出側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 dissipation fins are inserted and fixed in the axial direction except for a predetermined length range at one end on the cooling air inflow side, and the heat dissipation fins are gradually inserted in stages as they reach the cooling air outflow side. A rotating body suitable for photosensitive drums for electronic copying machines, etc., characterized by a dense fin pitch structure.
(2)放熱フィンの非挿入部分が全長の1/2以下の長
さ範囲であ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) A rotating body suitable for a photosensitive drum for an electronic copying machine or the like according to claim 1, wherein the portion where the radiation fins are not inserted has a length range of 1/2 or less of the total length.
(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) Claim 1 or 2, wherein the radiation fins have both side edges fitted into narrow grooves formed oppositely in both the inner and outer cylinders, and are joined to the inner and outer cylinders by brazing. Rotating body suitable for photosensitive drums for electronic copying machines.
(4)放熱フィンにアルミニウムプレージングシートが
用いられ、その皮材によつ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項ないし第
3項のいずれか1に記載の電子複写機用感光ドラムなど
に適した回転体。
(4) According to any one of claims 1 to 3, an aluminum plating sheet is used for the radiation fin, and the fin is brazed to both the inner and outer cylinders using the skin material. A rotating body suitable for the photosensitive drums for electronic copying machines described above.
JP60029093A 1985-02-15 1985-02-15 Rotating body suitable for sensitive drum or the like for electronic copying machine Pending JPS61188575A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60029093A JPS61188575A (en) 1985-02-15 1985-02-15 Rotating body suitable for sensitive drum or the like for electronic copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60029093A JPS61188575A (en) 1985-02-15 1985-02-15 Rotating body suitable for sensitive drum or the like for electronic copying machine

Publications (1)

Publication Number Publication Date
JPS61188575A true JPS61188575A (en) 1986-08-22

Family

ID=12266737

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60029093A Pending JPS61188575A (en) 1985-02-15 1985-02-15 Rotating body suitable for sensitive drum or the like for electronic copying machine

Country Status (1)

Country Link
JP (1) JPS61188575A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015004936A (en) * 2013-06-24 2015-01-08 シャープ株式会社 Developing device, process cartridge, and image forming apparatus using developing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015004936A (en) * 2013-06-24 2015-01-08 シャープ株式会社 Developing device, process cartridge, and image forming apparatus using developing device

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