JPS6114678A - Manufacture of photosensitive drum for electrophotographic copying machine - Google Patents

Manufacture of photosensitive drum for electrophotographic copying machine

Info

Publication number
JPS6114678A
JPS6114678A JP13618484A JP13618484A JPS6114678A JP S6114678 A JPS6114678 A JP S6114678A JP 13618484 A JP13618484 A JP 13618484A JP 13618484 A JP13618484 A JP 13618484A JP S6114678 A JPS6114678 A JP S6114678A
Authority
JP
Japan
Prior art keywords
fin
drum
outer ring
photosensitive drum
heat dissipation
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
JP13618484A
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 JP13618484A priority Critical patent/JPS6114678A/en
Publication of JPS6114678A publication Critical patent/JPS6114678A/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)

Abstract

PURPOSE:To manufacture a photosensitive body which is excellent in its radiating property by a simple method, and to lower sufficiently its surface temperature by inserting and holding a radiatio fin by many inserting and holding projecting lines formed on the inside surface of the outer ring of the photosensitive body, and fixing it as one body by means of brazing. CONSTITUTION:Many pairs of fin inserting and holding projecting lines 3 are formed in the axial direction on the inside surface of a photosensitive body outer ring 1, the end part of a radiation fin 4 having a V-shaped section is inserted into a gap 2 between the projecting lines 3 and tacked temporarily, and a skin material 4b of the fin is melted and fixed by a brazing treatment. When using this photosensitive drum, a cold air is fed in from one end of the outer ring 1 by a fan F. Accordingly, the photosensitive drum 1 becomes excellent in its radiating property, and even if the outer cylinder is heated by irradiating a light, the heat is radiated quickly, the drum can be rotated at a high speed, and a stable image can be formed.

Description

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

(従来の技術と問題点) 近年、電子複写機の小型化の要請は益々強いものがあり
、それに伴って感光ドラムも小さくなりつつある。加え
て、感光ドラムによって転写紙に画像を転写したのち、
該転写紙上に静電付着した顕画像の加熱定着操作を、感
光ドラムの周りで行うものとすることにより、定着部を
別に設ける場合のスペースを削減しようとする試みもな
されている。しかるに、感光ドラムは、コロナ放電器や
ランプによって熱せられるのに加えて、周面に加熱定着
ロールが密接配置されるような場合には、益々その温度
が」−昇される傾向を示すのに対し、従来の一般的な単
なる金属円筒体からなる感光ドラムでは、放熱性が悪い
ために、それ自体の小型化による表面積の減少傾向とも
相俟って、ドラムに加熱現象を生じ易く、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l
2Iff題点が生じている。
(Prior Art and Problems) In recent years, there has been an increasingly strong demand for miniaturization of electronic copying machines, and accordingly, photosensitive drums are also becoming smaller. In addition, after transferring the image to transfer paper using a photosensitive drum,
Attempts have also been made to reduce the space required to provide a separate fixing section by heating and fixing the visible image electrostatically adhered onto the transfer paper around the photosensitive drum. However, in addition to being heated by a corona discharger or a lamp, when a heating fixing roll is placed closely around the photosensitive drum, its temperature tends to increase. On the other hand, conventional photoconductor drums made of simple metal cylinders have poor heat dissipation properties, which, combined with the tendency for surface area to decrease due to miniaturization of the drum itself, tends to cause heating phenomena in the drum, causing the photoconductor to The charging performance of the drum may deteriorate significantly, or the toner may melt on the drum surface and prevent good transfer to the copy paper.
2Iff problem has occurred.

このような問題点に対して、ドラムの放熱性を上げるた
めに、そのシリンダ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れている〈例えば実開
昭56−120566号公報)が、このような一体成形
フィンは、イの数を増すことに限濱があり、所期するよ
うな感光ドラムの放熱効果を実用しうるちのではなかっ
た。
To solve this problem, in order to improve the heat dissipation performance of the drum, a proposal has already been made to integrally form protrusions that act as heat dissipation fins on the inner surface of the cylinder (for example, Japanese Utility Model Application No. 56-120566). However, such an integrally molded fin has a limitation in increasing the number of fins, and has not been able to achieve the desired heat dissipation effect of the photosensitive drum.

(発明の目的) この発明は」−記のような従来技術の問題点に鑑み、放
熱性に優れ、従って例えば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
分に下降せしめつるような感光ドラムの簡易な製造方法
を貯供することを目的としてなされたものである。
(Objective of the Invention) In view of the problems of the prior art as described in ``-'', the present invention has excellent heat dissipation properties, and therefore, even when a heating fixing roll is brought into contact with a part of the circumferential surface, it can be rotated. The purpose of this invention is to provide a simple method for manufacturing a photosensitive drum in which the surface temperature is sufficiently lowered during the process up to the charging section where an electrostatic latent image is formed.

(発明の構成) この発明は、上記の目的を達成するために、アルミニウ
ム押出材からなる円節状ドラム外輪の内面に、軸線方向
に沿って、相n間にフィン挿入IN隙を存置して対峙す
る各1対のフィン挾持用凸条を多数組一体成形し、前記
フィン挿入間隙にアルミニウム・ブレージングシートか
らなる放熱フィンの一側縁部を挿入したのち、前記凸条
対の一部を加締めて放熱フィンを挟着状態に仮止め固定
し、次いで加熱ろう付け処理を施して前記放熱フィンを
ぞの皮材によりドラ11外輪に一体的に接合固定するこ
とを特徴とする電子複写機用感光ドラムの製造方法を提
示するものである。
(Structure of the Invention) In order to achieve the above object, the present invention provides a fin insertion IN gap between the phases n along the axial direction on the inner surface of the cylindrical drum outer ring made of extruded aluminum material. After integrally molding a large number of pairs of opposing fin-holding protrusions, and inserting one side edge of the heat dissipation fin made of an aluminum brazing sheet into the fin insertion gap, a part of the pair of protrusions is processed. For an electronic copying machine, the heat dissipating fin is temporarily fixed in a sandwiched state by tightening the heat dissipating fin, and then heat brazing is performed to integrally bond and fix the heat dissipating fin to the outer ring of the drum 11 using a skin material. A method for manufacturing a photosensitive drum is presented.

(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。
(Example) Hereinafter, an example 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)は表面に感光層が
形成される円筒状のドラム外輪であり、これはアルミニ
ウム合金による押出材として成形する。而して、この押
出し成形に際し、ドラム外輪(1)の内面には、相互間
にフィン=  4 − 距入間11t(2)を介して平行状に対峙する各1対の
フィン挾持用凸条(3)(3)を軸線方向に沿って多数
組一体成形したものとする。
In FIGS. 1 and 2, <1) is a cylindrical drum outer ring on which a photosensitive layer is formed, and this is molded as an extruded aluminum alloy material. During this extrusion molding, the inner surface of the drum outer ring (1) is provided with a pair of fin-holding protrusions (2) that face each other in parallel with a fin = 4 - 11t (2) between them. 3) Multiple sets of (3) are integrally molded along the axial direction.

一方、上記ドラム外輪(1)とは別に放熱フィン(4)
を用意する。該放熱フィン(4)は、芯材〈4a)の両
面にろう材からなる皮材〈4b)(4b)を被覆したア
ルミニウム・ブレージングシートからなるものとし、か
つ好ましくは第3図〈イ)(ロ)に示′!jJ:うな断
面略U字状あるいはV字状のフィン(4)(4’ )と
して製作づる。断る形状の場合、後述のようなドラム外
輪(1)に対する取付け作業性の点で有利であるが、も
ちろんこれらの形状に限定されるものではなく、中なる
平坦な帯板状のものに製作しても良いし、放熱効率を一
層向上するべく放熱板部に横断面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こし部を形
成したもの等とすることも推奨される。
On the other hand, apart from the drum outer ring (1), there are heat dissipation fins (4).
Prepare. The radiation fins (4) are made of an aluminum brazing sheet in which both sides of a core material (4a) are coated with skin materials (4b) made of brazing material (4b), and preferably as shown in Fig. 3 (a) ( b) Shown in '! jJ: Manufactured as a fin (4) (4') with a roughly U-shaped or V-shaped cross section. In the case of a shape that is cut off, it is advantageous in terms of ease of attachment to the drum outer ring (1) as described later, but of course the shape is not limited to these shapes, and the shape can be made into a flat strip-like shape. Alternatively, in order to further improve heat dissipation efficiency, it is recommended that the heat dissipation plate section be corrugated in the cross-sectional direction, or that it be formed with a large number of louver-shaped cut and raised sections.

そこで、上記放熱フィン(4)をドラム外輪〈1)に取
付けるが、特にこの取付けは次の如くしで行う。即ち先
ず、各放熱フィン(4)の側縁部(4a)を各1対をな
す挾持用凸状(3)(3)間のフィン挿入間隙(2)に
挿し込み、そして外輪(1)の両端部においてI&!両
凸条(3)(3)を両側から工L1ある&)tJ機械で
挟みイ・Hノ加締めて僅かにW!牲変形させることにに
す、放熱フィン〈4)の両端部を上記両凸条(3)(3
)間に部分的に挟着固定して各フィンをドラム外輪(1
)に仮止め状態にする。このようにして所要ピッチに所
要数の放熱フィン(4)の仮止めを行ったのち、常法に
よるろう付け処理により、放熱フィン(4)の前記皮材
〈4b)を溶融して第2図に示すようにその側縁部をド
ラム外輪(1)の内面にろう付け固定し、第1図に示す
ような所期する電子複写機用感光ドラム製品とする。
Therefore, the heat dissipation fins (4) are attached to the drum outer ring (1), and this attachment is carried out in the following manner. That is, first, the side edges (4a) of each heat dissipation fin (4) are inserted into the fin insertion gap (2) between the pair of holding convexes (3) (3), and then the outer ring (1) is inserted. I&! at both ends. Sandwich the double-convex strips (3) (3) from both sides with a machining L1 &)tJ machine and tighten them slightly W! I decided to deform the heat dissipating fins (4) at both ends with the above-mentioned double convex stripes (3) (3).
), each fin is partially clamped and fixed between the drum outer ring (1
) to temporarily fix it. After temporarily fixing the required number of heat dissipating fins (4) at the required pitch in this way, the skin material (4b) of the heat dissipating fins (4) is melted by a conventional brazing process, as shown in Fig. 2. As shown in FIG. 1, the side edges thereof are brazed and fixed to the inner surface of the drum outer ring (1) to obtain the desired photosensitive drum product for an electronic copying machine as shown in FIG.

上記の如き感光ドラムは、使用に際し、例えばその外輪
(1)に両端を可及的大きく開放せしめた状態で適宜回
転自在に支承し、一端より内部に冷却用ファン(F)で
冷却空気を送り込む如くして強制空冷式のものとして実
用に供する。この発明の実施は、ドラムの回転支承を簡
易に11いうるものとづるために、外輪(1)内の中心
部に、これと同芯に軸受を兼ねた管状の内輪を複数本の
放射状連結桟を介して同時押出しにより一体成形したも
のとしても良い。この場合、放熱フィン(4)の内方の
側縁部を上記内輪の外面に当接させ、両者をもろう接す
るものとJることが好ましい。
When the photosensitive drum as described above is used, it is rotatably supported, for example, on its outer ring (1) with both ends opened as wide as possible, and a cooling fan (F) blows cooling air into the interior from one end. In this way, it is put into practical use as a forced air cooling type. In order to simplify the rotational support of the drum, a plurality of tubular inner rings, which also serve as bearings, are connected concentrically to the center of the outer ring (1) in a radial manner. It may also be integrally formed by simultaneous extrusion via a crosspiece. In this case, it is preferable that the inner side edges of the heat dissipating fins (4) are brought into contact with the outer surface of the inner ring, and the two are also soldered together.

(発明の効果) この発明によれば、上述の次第で、ドラム外輪の内側に
任意に多数の薄い放熱フィンを備えた感光ドラムを得る
ことができる。従って、該放熱ドラムは、放熱性能に極
めて優れたものとなり、]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h&熱して過熱現象を生じることがな(、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
し、常に安定した画像形成を行なうものどなしつる。殊
に第1図に示すように、ドラムの一端からファンで風を
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
加熱室nローラにより転7′I″It(+−の転写画像
の定着を(1わしめるJ、うな場合(゛さえ、これにJ
、って加熱されたドラムの外周面部が帯電部に至る、1
ぐに該外周面部のff1lαをfれ分に所要の低い温1
aにJ、で下げることが可能どイ「す、τ)い−(は複
写機の一層の小型化をト1かるL r IJ+常に有効
<1−6のと’、r L/ 4gる。
(Effects of the Invention) According to the present invention, as described above, it is possible to obtain a photosensitive drum having an arbitrarily large number of thin heat dissipating fins inside the drum outer ring. Therefore, the heat dissipation drum has extremely excellent heat dissipation performance, and even if the outer cylinder is heated due to discharge from the Rona discharger or irradiation with light from the lamp,
It is possible to quickly heat the drum without causing an overheating phenomenon (the rotation speed of the drum can be increased to increase the speed, and it is possible to always form a stable image.Especially as shown in Fig. 1). In this case, by blowing air with a fan from one end of the drum to perform forced air cooling, the heat dissipation effect can be easily promoted. It (+-) to fix the transferred image (1)
, the heated outer peripheral surface of the drum reaches the charging section, 1
ff1lα of the outer circumferential surface part is set to the required low temperature 1.
It is possible to lower the value by J, which allows further miniaturization of copying machines.

、1.lこ、この発明において1.1、ドラム外輪の内
面に一体形成したフィン決し’+用凸条間の渦に放熱フ
ィンの側縁部を挿入したのI5、この凸条対01部をか
しめて放熱フィンを挟着状態に仮止め固定したのち、ろ
う付け処理によりその確実な固定をはかるものであるか
ら、ドラム外輪に対する放熱フィンの取付を格別な冶具
を用いることイ丁<比較的簡単かつ確実に行い得て、放
熱フィンに位置ずれ等を生じることがなく、かつドラム
外輪自体が押出成形品からなるものであっで形状のばら
つきが少なくてすむことも相俟って、真円m等の精度に
帰れた感光ドラムを不良品の発生率少なく製造すること
ができる。また、ドラム外輪に押出し成形によって多数
の放熱フィンを一体成形するような場合に較べ、ドラム
のIMを軽減することが可能となり、その軽量化、月利
=1ストの低減化をはかることができる。更にまた放熱
フィンをろう接によりドラム外輪に接合固定することに
より、両者間での熱伝導性がよく、前記の放熱性能を全
体に亘ってばらつきのない安定したものとすることがで
きる。
, 1. l In this invention, 1.1, the side edge of the heat dissipation fin is inserted into the vortex between the fin-separating protrusions integrally formed on the inner surface of the outer drum outer ring. After the heat dissipation fins are temporarily clamped and fixed, they are securely fixed by brazing, so it is relatively easy and reliable to use a special jig to attach the heat dissipation fins to the drum outer ring. The drum outer ring itself is made of an extrusion molded product, so there is less variation in shape. Photosensitive drums with high accuracy can be manufactured with a low incidence of defective products. Additionally, compared to the case where a large number of heat dissipating fins are integrally molded on the outer ring of the drum by extrusion molding, it is possible to reduce the IM of the drum, and it is possible to reduce its weight and monthly profit = 1 stroke. . Furthermore, by joining and fixing the heat dissipation fins to the drum outer ring by soldering, the heat conductivity between the two is good, and the heat dissipation performance described above can be made stable without variation over the entire body.

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

図面はこの発明の実施例を示すもので、第1図は製品で
ある感光ドラムの一部を切欠いて示した斜視図、第2図
は要部の拡大断面図、第3図(イ)(ロ)は第1図の感
光ドラムに用いられている放熱フィンとその変形例の各
断面図である。 (1)・・・ドラム外輪、(2)・・・フィン挿入間隙
、(3)・・・フィン挾持用凸条、〈4)・・・放熱フ
ィン、(4a)・・・芯材、(4b)・・・皮材。 以  上
The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway perspective view of a photosensitive drum as a product, FIG. 2 is an enlarged cross-sectional view of the main part, and FIG. B) is a sectional view of a heat radiation fin used in the photosensitive drum of FIG. 1 and a modification thereof. (1)...Drum outer ring, (2)...Fin insertion gap, (3)...Fin holding protrusion, <4)...Radiating fin, (4a)...Core material, ( 4b)...Leather material. that's all

Claims (1)

【特許請求の範囲】[Claims] アルミニウム押出材からなる円筒状ドラム外輪の内面に
、軸線方向に沿って、相互間にフィン挿入間隙を存置し
て対峙する各1対のフィン挾持用凸条を多数組一体成形
し、前記フィン挿入間隙にアルミニウム・ブレージング
シートからなる放熱フィンの一側縁部を挿入したのち、
前記凸条対の一部を加締めて放熱フィンを挟着状態に仮
止め固定し、次いで加熱ろう付け処理を施して前記放熱
フィンをその皮材によりドラム外輪に一体的に接合固定
することを特徴とする電子複写機用感光ドラムの製造方
法。
On the inner surface of a cylindrical drum outer ring made of an extruded aluminum material, a large number of sets of fin-holding protrusions are integrally molded along the axial direction, facing each other with a fin insertion gap between them, and the fin insertion After inserting one side edge of the heat dissipation fin made of aluminum brazing sheet into the gap,
The heat dissipation fins are temporarily fixed in a pinched state by caulking a part of the pair of protrusions, and then heat brazing is performed to integrally bond and fix the heat dissipation fins to the drum outer ring using the skin material. A method for manufacturing a photosensitive drum for an electronic copying machine.
JP13618484A 1984-06-29 1984-06-29 Manufacture of photosensitive drum for electrophotographic copying machine Pending JPS6114678A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13618484A JPS6114678A (en) 1984-06-29 1984-06-29 Manufacture of photosensitive drum for electrophotographic copying machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13618484A JPS6114678A (en) 1984-06-29 1984-06-29 Manufacture of photosensitive drum for electrophotographic copying machine

Publications (1)

Publication Number Publication Date
JPS6114678A true JPS6114678A (en) 1986-01-22

Family

ID=15169303

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13618484A Pending JPS6114678A (en) 1984-06-29 1984-06-29 Manufacture of photosensitive drum for electrophotographic copying machine

Country Status (1)

Country Link
JP (1) JPS6114678A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02118684A (en) * 1988-10-28 1990-05-02 Nec Corp Process cartridge

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5278750A (en) * 1975-12-26 1977-07-02 Honda Motor Co Ltd Method of making fuel tank
JPS5480255A (en) * 1977-12-09 1979-06-26 Hitachi Ltd Soldering method
JPS558262U (en) * 1978-07-04 1980-01-19

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5278750A (en) * 1975-12-26 1977-07-02 Honda Motor Co Ltd Method of making fuel tank
JPS5480255A (en) * 1977-12-09 1979-06-26 Hitachi Ltd Soldering method
JPS558262U (en) * 1978-07-04 1980-01-19

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02118684A (en) * 1988-10-28 1990-05-02 Nec Corp Process cartridge

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