JP3198342B2 - Photoconductor drum - Google Patents
Photoconductor drumInfo
- Publication number
- JP3198342B2 JP3198342B2 JP25163691A JP25163691A JP3198342B2 JP 3198342 B2 JP3198342 B2 JP 3198342B2 JP 25163691 A JP25163691 A JP 25163691A JP 25163691 A JP25163691 A JP 25163691A JP 3198342 B2 JP3198342 B2 JP 3198342B2
- Authority
- JP
- Japan
- Prior art keywords
- flange
- adhesive
- photosensitive drum
- press
- resin material
- 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.)
- Expired - Fee Related
Links
- 239000000853 adhesive Substances 0.000 claims description 81
- 230000001070 adhesive effect Effects 0.000 claims description 80
- 229920005989 resin Polymers 0.000 claims description 37
- 239000011347 resin Substances 0.000 claims description 37
- 239000000463 material Substances 0.000 claims description 36
- 108091008695 photoreceptors Proteins 0.000 claims description 29
- 229910000838 Al alloy Inorganic materials 0.000 description 6
- 238000000465 moulding Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Landscapes
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、電子写真方式の感光体
ドラムの改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an electrophotographic photosensitive drum.
【０００２】[0002]
【従来の技術】従来の感光体ドラムは、その両端に取り
付けられるフランジが感光体筒と同様に主にアルミ合金
で作られていた。そして、フランジは感光体筒の両端に
取り付けられるが、感光体筒の接地はこの導電性のある
アルミ合金のフランジを通して接地されていた。しか
し、コストの面から近年に至ってアルミ合金のフランジ
に代って導電性樹脂材を使用した一体成形フランジが盛
んに提案される様になった。導電性樹脂材を使用したフ
ランジは、フランジを感光体筒に取り付けるためのスト
ッパとなる鍔、感光体筒との嵌合部、感光体ドラムを回
転させるギヤ、感光体ドラムの回転軸の軸受部等が一体
成形で作ることが出来、感光体ドラムを製造するコスト
の面で非常に有利な提案となっていた。更に摺動性の良
い樹脂材を使用することにより、軸受部に別のベアリン
グ部材を使用することなく、そのまま軸受部として使用
することが出来るため、更にコストの面で有利となって
いた。2. Description of the Related Art In a conventional photosensitive drum, flanges attached to both ends thereof are mainly made of an aluminum alloy like the photosensitive drum. The flanges are attached to both ends of the photosensitive drum, and the ground of the photosensitive drum is grounded through the conductive aluminum alloy flange. However, in recent years, in view of cost, integrally molded flanges using a conductive resin material have been actively proposed instead of aluminum alloy flanges. The flange made of a conductive resin material includes a flange serving as a stopper for attaching the flange to the photosensitive drum, a fitting portion with the photosensitive drum, a gear for rotating the photosensitive drum, and a bearing for a rotating shaft of the photosensitive drum. And the like can be made by integral molding, which has been a very advantageous proposal in terms of the cost of manufacturing the photosensitive drum. Further, by using a resin material having good slidability, the bearing portion can be used as it is without using another bearing member, which is further advantageous in terms of cost.
【０００３】そして、この様な導電性樹脂材を使用した
フランジの感光体筒への取り付けは、感光体筒の接地性
を確保するために、感光体筒への圧入かあるいは、導電
性接着剤による接着によりフランジを感光体筒へ取り付
ける様に提案されていた。すなわち、この様にして感光
体筒とフランジ間の導電性が確保され、更に感光体ドラ
ムが組み込まれた装置に接地された金属の回転軸が、フ
ランジの軸受部に挿入されて感光体筒が接地される様に
なっていた。In order to secure the grounding of the photosensitive drum, the flange using such a conductive resin material is attached to the photosensitive drum by press-fitting the photosensitive drum or a conductive adhesive. It has been proposed to attach a flange to a photoreceptor cylinder by bonding with a photoreceptor. That is, in this way, the conductivity between the photosensitive drum and the flange is ensured, and furthermore, the rotating shaft of the metal grounded to the device incorporating the photosensitive drum is inserted into the bearing of the flange, and the photosensitive drum is rotated. It was going to be grounded.
【０００４】[0004]
【発明が解決しようとする課題】上記の様に、導電性樹
脂材を使用した一体成形フランジを感光体筒に取り付け
る場合、圧入によって取り付ける場合は、感光体筒とフ
ランジの材料は近似した熱膨張係数をもった材料を使用
する必要があった。もしも、両者の熱膨張係数に差があ
りすぎると、感光体ドラムが組み込まれた装置が苛酷な
温度環境の場所で使われる様な場合、感光体筒へのフラ
ンジの取付けが不安定になったり、あるいは、感光体筒
よりフランジが外れてしまうことになるからである。こ
れは、熱膨張係数の差により、感光体筒とフランジの圧
入部に温度変化による寸法の伸び縮みの差が出来てしま
って、両者の間に隙間で出来てしまうからである。感光
体筒へのフランジの取付けが不安定になったり、あるい
は、感光体筒よりフランジが外れてしまう様な状態で
は、感光体筒の、導電性樹脂のフランジを通しての接地
は不安定なものとなったり、接地がされないといった事
になるわけである。この様な接地不良の状態では、画像
不良が発生するだけでなく、電気ノイズを発生し、装置
の誤動作や、場合によっては半導体部品の破損につなが
ることも生じる。As described above, when an integrally formed flange using a conductive resin material is attached to a photosensitive drum or when it is attached by press-fitting, the materials of the photosensitive drum and the flange have similar thermal expansion. Materials with coefficients had to be used. If there is too much difference in the coefficient of thermal expansion between the two, the mounting of the flange to the photoreceptor cylinder may become unstable if the device incorporating the photoreceptor drum is used in a place with a severe temperature environment. Alternatively, the flange may come off from the photosensitive drum. This is because a difference in thermal expansion coefficient causes a difference in expansion and contraction of dimensions due to a temperature change in the press-fit portion of the photosensitive drum and the flange, and a gap is formed between the two. If the mounting of the flange to the photoconductor cylinder becomes unstable or the flange comes off from the photoconductor cylinder, grounding of the photoconductor cylinder through the conductive resin flange may be unstable. Or it will not be grounded. In such a state of poor grounding, not only an image defect occurs but also electrical noise is generated, which may lead to a malfunction of the device and, in some cases, damage to semiconductor components.
【０００５】感光体筒は上記の様に通常アルミ合金が使
用されるが、アルミ合金の熱膨張係数は2.3×10-5／℃
である。これに近似した熱膨張係数を有する樹脂材とい
うことになると、ポリイミド樹脂といった熱膨張係数が
2.5×10-5／℃の樹脂が例示できる。しかし、この樹脂
はコスト的にも非常に高価な樹脂材であり、この様な高
価な樹脂材をフランジの材料として使ったのでは導電性
樹脂材を使用した時の、上で述べた様なコストメリット
は無くなってしまうことになる。As described above, an aluminum alloy is usually used for the photosensitive drum, but the thermal expansion coefficient of the aluminum alloy is 2.3 × 10 −5 / ° C.
It is. When it comes to a resin material having a thermal expansion coefficient close to this, the thermal expansion coefficient of polyimide resin
A resin of 2.5 × 10 −5 / ° C. can be exemplified. However, this resin is a very expensive resin material in terms of cost, and if such an expensive resin material is used as the material of the flange, when the conductive resin material is used, as described above, The cost merit will be lost.
【０００６】感光体筒へ導電性樹脂材を使用したフラン
ジの別の取り付け方法としては、上記の様に導電性接着
剤による接着という取付け方法がある。この場合は、上
記の場合の様に感光体筒と近似の熱膨張係数をもった高
価な導電性樹脂材でなく、安価な通常の導電性樹脂材を
使用したフランジを、感光体筒に導電性接着剤により接
着することになる。しかし、この導電性接着剤も高価な
接着剤である。As another method of attaching a flange using a conductive resin material to the photosensitive drum, there is an attachment method of bonding with a conductive adhesive as described above. In this case, instead of using an expensive conductive resin material having a thermal expansion coefficient similar to that of the photoreceptor cylinder as in the above case, a flange using an inexpensive ordinary conductive resin material is provided on the photoreceptor cylinder. It will be adhered by the conductive adhesive. However, this conductive adhesive is also an expensive adhesive.
【０００７】本発明は、上記課題を解決するためになさ
れたものである。すなわち、感光体筒へ導電性樹脂材を
使用したフランジを取付けるのに、感光体筒と近似した
熱膨張係数の高価な導電性樹脂材を使用したフランジの
圧入でなく、安価な通常の導電性樹脂材を使用したフラ
ンジを、高価な導電性接着剤でなく、非導電性接着剤で
ある安価な通常の接着剤により接着し取り付けることが
出来、コストの安い感光体ドラムを提供することを目的
としたものである。The present invention has been made to solve the above problems. In other words, instead of press-fitting a flange using a conductive resin material with a thermal expansion coefficient similar to that of the photosensitive drum to attach a flange made of a conductive resin material to the photosensitive drum, it is inexpensive ordinary conductive material. An object of the present invention is to provide an inexpensive photoreceptor drum in which a flange made of a resin material can be attached and attached with an inexpensive ordinary adhesive which is a non-conductive adhesive instead of an expensive conductive adhesive. It is what it was.
【０００８】[0008]
【課題を解決するための手段】上記目的は、感光体筒の
両側端部に、導電性樹脂材で成形したフランジを接着剤
により取り付けた感光体ドラムにおいて、前記フランジ
は、前記フランジに設けた前記感光体筒の外径より大き
くなく、内径よりは大きい径の鍔に続く前記感光体筒へ
の圧入部と、該圧入部に隣接して接着剤溝部とを有し、
前記感光体筒内径入口部に接着剤を付着した後に前記フ
ランジを圧入することにより、前記感光体筒と前記圧入
部との導通が保たれるように接触し、且つ前記接着剤溝
部に接着剤が入り込むことにより前記感光体筒と前記フ
ランジを接着し、取り付けたことを特徴とする感光体ド
ラムによって達成される。SUMMARY OF THE INVENTION The object of the present invention is to provide a photosensitive drum in which flanges made of a conductive resin material are attached to both side ends of a photosensitive drum with an adhesive, wherein the flange is provided on the flange. Not having a diameter larger than the outer diameter of the photoconductor cylinder, a press-fit portion to the photoconductor cylinder following a flange having a diameter larger than the inner diameter, and an adhesive groove portion adjacent to the press-fit portion,
By press-fitting the flange after the adhesive is attached to the entrance of the photoconductor cylinder inner diameter, the photoconductor cylinder and the press-fitting section are brought into contact with each other so that conduction is maintained, and the adhesive is inserted into the adhesive groove. , The photosensitive drum and the flange are bonded and attached to each other, thereby achieving the above object.
【０００９】更に上記目的は、前記接着剤が非導電性接
着剤であることを特徴とする感光体ドラムによって達成
されるものである。Further, the above object is achieved by a photosensitive drum wherein the adhesive is a non-conductive adhesive.
【００１０】[0010]
【実施例】次に本発明の実施例を添付した図面により説
明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the accompanying drawings.
【００１１】図１は本発明の一実施例を示し、感光体筒
にフランジを取り付けた感光体ドラムの図面で、（ａ）
は感光体ドラムの全体図及び右側は一部断面図、（ｂ）
は（ａ）の図のＸ−Ｘ断面の矢視図である。FIG. 1 shows an embodiment of the present invention and is a drawing of a photosensitive drum having a flange attached to a photosensitive drum.
Is an overall view of the photosensitive drum and a partial cross-sectional view is on the right side, (b)
FIG. 3 is a view of the section taken along line XX of FIG.
【００１２】図１（ａ）において、10は感光体筒であ
り、その右側端部には導電性樹脂材で成形したフランジ
Ａ・111が、そして左側端部には同じく導電性樹脂材で
成形したフランジＢ・112が感光体筒10の内径に圧入さ
れ、接着剤により感光体筒10の内径に接着し、取り付け
られ、感光体ドラム１を形成している。In FIG. 1 (a), reference numeral 10 denotes a photoreceptor cylinder, a flange A 111 formed of a conductive resin material on the right end thereof, and a conductive resin material formed on the left end thereof. The flange B 112 is press-fitted into the inner diameter of the photoreceptor cylinder 10, adhered to the inner diameter of the photoreceptor cylinder 10 with an adhesive, and attached to form the photoreceptor drum 1.
【００１３】フランジＡ・111には、感光体筒10の外径よ
りは大きくなく、内径よりは大きい径の鍔の、フランジ
Ａ・111を感光体筒10に所定の様に取り付けるために設
けたストッパである鍔部Ｎが設けてある。なお、感光体
筒10の外径よりも鍔が同じか小さいのは、感光体ドラム
を清掃するクリーニングブレード等を、鍔部Ｎにより傷
つけるのを防止するためである。そしてフランジＡ・11
1には上記鍔部Ｎに続いて感光体筒10の内径への圧入部
Ｋが設けられ、更に、圧入部Ｋに隣接して始まる接着剤
溝部Ｌが設けてある。図１（ｂ）において、接着剤溝部
Ｌは、上記の様に圧入部Ｋに隣接して圧入部Ｋと同径の
円周上に、図示の様に多数設けられている事を示してい
る。そして、フランジＡ・111の中心には感光体ドラム
１の回転軸が挿入される軸受部Ｐが設けてある。この様
にフランジＡ・111は、鍔部Ｎ、圧入部Ｋ、接着剤溝部
Ｌ、及び軸受部Ｐと共に導電性樹脂材料の一体成形によ
り製造される。なお、感光体筒10の左側端部に取り付け
られるフランジＢ・112には、感光体ドラム１を回転す
る駆動力を伝達するギヤＧが設けられており、フランジ
Ａ・111と同様に鍔部、圧入部、接着剤溝部、及び軸受
部と共に導電性樹脂材の一体成形により製造される。The flange A · 111 is provided with a flange having a diameter not larger than the outer diameter of the photosensitive drum 10 but larger than the inner diameter thereof to attach the flange A · 111 to the photosensitive drum 10 in a predetermined manner. A flange N serving as a stopper is provided. The reason why the flange is equal to or smaller than the outer diameter of the photosensitive drum 10 is to prevent the cleaning blade for cleaning the photosensitive drum from being damaged by the flange N. And flange A ・ 11
A press-fit portion K into the inner diameter of the photoreceptor cylinder 10 is provided at 1 following the flange portion N, and an adhesive groove portion L starting adjacent to the press-fit portion K is provided. In FIG. 1B, as shown in the drawing, a large number of adhesive groove portions L are provided on the circumference having the same diameter as the press-fit portion K adjacent to the press-fit portion K as described above. . At the center of the flange A 111, there is provided a bearing portion P into which the rotating shaft of the photosensitive drum 1 is inserted. In this way, the flanges A and 111 are manufactured by integral molding of a conductive resin material together with the flange portion N, the press-fit portion K, the adhesive groove portion L, and the bearing portion P. The flange B 112 attached to the left end of the photoreceptor cylinder 10 is provided with a gear G for transmitting a driving force for rotating the photoreceptor drum 1. It is manufactured by integral molding of a conductive resin material together with the press-fit portion, the adhesive groove portion, and the bearing portion.
【００１４】上で説明した圧入部Ｋに隣接して圧入部Ｋ
と同径の円周上に多数設けられた接着剤溝部Ｌは、圧入
部Ｋと共に内径入口部に接着剤が付着された感光体筒10
の内径に圧入されてフランジＡ・111は感光体筒10の内
径に接着される。もちろん、フランジＢ・112にも同様
の接着剤溝が設けられており、同様の方法により感光体
筒10の内径に接着される。The press-fit portion K is adjacent to the press-fit portion K described above.
A large number of adhesive grooves L provided on the circumference having the same diameter as that of the photosensitive drum 10 with the adhesive adhered to the inner diameter entrance portion together with the press-fit portion K.
And the flange A 111 is bonded to the inner diameter of the photosensitive drum 10. Of course, similar adhesive grooves are also provided on the flanges B and 112, and they are bonded to the inner diameter of the photosensitive drum 10 by the same method.
【００１５】この様にして、感光体筒10の両側端部には
フランジＡ・111、フランジＢ・112が取り付けられ、感
光体ドラム１が完成する。In this manner, the flanges A and 111 and the flanges B and 112 are attached to both end portions of the photosensitive drum 10, thereby completing the photosensitive drum 1.
【００１６】図２は、本発明の別の実施例を示すフラン
ジの図である。感光体筒については、上記の実施例で使
用したものと全く同じなので、フランジについてのみ説
明する。FIG. 2 is a view of a flange showing another embodiment of the present invention. Since the photoreceptor cylinder is exactly the same as that used in the above embodiment, only the flange will be described.
【００１７】図２において、フランジＤ・121には上記
フランジＡ・111と同様に鍔部Ｎが設けてある。そして
フランジＤ・121には、鍔部Ｎに続いて感光体筒の内径
への圧入部Ｋ、接着剤溝部Ｌ、及び圧入部Ｋより小径で
接着剤溝部Ｌを作っている小径部Ｑが図示の様に続けて
設けられている。そして、フランジＤ・121の中心には
フランジＡ・111と同様に、感光体ドラムの回転軸が挿
入される図示せぬ軸受部が設けられている。この様にフ
ランジＤ・121は、フランジＡ・111と同様に、鍔部Ｎ、
圧入部Ｋ、接着剤溝部Ｌ、小径部Ｑ、及び軸受部が導電
性樹脂材の一体成形により製造される。しかし、接着剤
溝部Ｌは、圧入部Ｋと小径部Ｑに挟まれてリング状の溝
形に径が小さくなっているため、部品精度上から樹脂型
構造としては左右の割り型に、接着剤溝部Ｌ用の上下分
割形のスライドコアーを組み合わせる形になり、フラン
ジＡ・111用の樹脂型に比べて型構造が若干複雑になる
のは避けられない。In FIG. 2, a flange portion N is provided on the flange D · 121 similarly to the flange A · 111. The flange D · 121 has a flange portion N, a press-fit portion K into the inner diameter of the photosensitive drum, an adhesive groove portion L, and a small-diameter portion Q having a smaller diameter than the press-fit portion K to form an adhesive groove portion L. It is provided continuously like. At the center of the flange D · 121, similarly to the flange A · 111, a bearing (not shown) into which the rotating shaft of the photosensitive drum is inserted is provided. In this way, the flange D · 121 is, like the flange A · 111, the flange N,
The press-fit portion K, the adhesive groove portion L, the small diameter portion Q, and the bearing portion are manufactured by integral molding of a conductive resin material. However, since the diameter of the adhesive groove L is reduced to a ring-shaped groove between the press-fit portion K and the small-diameter portion Q, the resin mold structure is divided into left and right split molds from the viewpoint of component accuracy. Since the upper and lower split type slide cores for the groove L are combined, it is inevitable that the mold structure becomes slightly more complicated than the resin mold for the flanges A and 111.
【００１８】そして、このリング状の接着剤溝部Ｌは、
フランジＡ・111、フランジＢ・112の場合と同様に圧入
部Ｋと共に内径入口部に接着剤が付着された感光体筒の
一方の側の側端部内径に圧入され、フランジＤ・121は
感光体筒の内径に接着される。もちろん、感光体筒の反
対側の側端部にも、フランジＢ・112の場合と同様に、
感光体ドラムを回転する駆動力を伝達するギヤが導電性
樹脂材の一体成形で設けられたフランジがフランジＤ・
121と同様の方法で感光体筒の内径に接着され、感光体
ドラムが完成する。The ring-shaped adhesive groove L is
As in the case of the flanges A and 111 and the flanges B and 112, together with the press-fitting portion K, the photosensitive drum with the adhesive adhered to the inner diameter entrance is pressed into the inner diameter of one side end of the photosensitive drum. Glued to the inside diameter of the body tube. Of course, also on the opposite side end of the photoreceptor cylinder, as in the case of the flange B 112,
A gear for transmitting a driving force for rotating the photosensitive drum is provided by integral molding of a conductive resin material.
The photosensitive drum is completed by being bonded to the inner diameter of the photosensitive drum in the same manner as 121.
【００１９】次に接着剤と接着状態について説明する。Next, the adhesive and the bonding state will be described.
【００２０】本発明においては、導電性樹脂材で成形し
たフランジの、感光体筒内径に圧入する圧入部に隣接し
て接着剤溝部を設け、感光体筒内径入口部に接着剤を付
着してフランジを圧入接着して取り付け、接着剤として
は好ましくは非導電性接着剤を使用することを提案して
いる。In the present invention, an adhesive groove is provided adjacent to a press-fit portion of the flange formed of a conductive resin material for press-fitting into the inner diameter of the photoreceptor cylinder, and an adhesive is adhered to the entrance of the inner diameter of the photoreceptor cylinder. It has been proposed to press-fit the flange and attach it, preferably using a non-conductive adhesive as the adhesive.
【００２１】感光体筒にフランジを取り付ける時は、上
記の様に感光体筒内径入口部に非導電性接着剤を付着
し、感光体筒内径にフランジの圧入部Ｋを圧入すること
になるが、感光体筒内径にはまず接着剤溝部Ｌが挿入さ
れ、次いで圧入部Ｋが圧入されることになる。そして鍔
部Ｎにより鍔部Ｎがストッパとなり、フランジは感光体
筒に所定の様に取り付けられることになる。When the flange is attached to the photosensitive drum, a non-conductive adhesive is attached to the entrance of the inner diameter of the photosensitive drum as described above, and the press-fit portion K of the flange is pressed into the inner diameter of the photosensitive drum. First, the adhesive groove L is inserted into the inner diameter of the photosensitive drum, and then the press-fitting portion K is press-fitted. The flange N serves as a stopper, and the flange is attached to the photosensitive drum in a predetermined manner.
【００２２】そこでまず、フランジがフランジＡ・111
の様に、接着剤溝部Ｌが圧入部Ｋと同径の円周上に多数
設けられている場合について説明する。上記接着剤溝部
Ｌを、感光体筒の内径に挿入する時は、感光体筒の内径
入口部に付着した接着剤は、接着剤溝部Ｌを円周上でつ
ないでいる圧入部によりまず押されて、感光体筒内径の
奥に押し込まれるが、同時にその一部は接着剤溝部Ｌに
も流れこむことになる。そして、更に本来の圧入部Ｋが
圧入されることにより、接着剤溝部Ｌと圧入部Ｋとの境
界エッジ部が接着剤を掻き落し、掻き落した接着剤は接
着剤溝部Ｌに溜ることになる。接着剤溝部Ｌより接着剤
が溢れた時は、接着剤は溝部の開口側より感光体筒内径
へと流れ出ることになる。この様にして、感光体筒の内
径に圧入部Ｋは圧入されるが、特に接着剤溝部Ｌと圧入
部Ｋとの境界エッジ部が接着剤を掻き落した個所は、感
光体筒内径と圧入部Ｋの間には接着剤がほとんど入る事
なく密着し、感光体筒とフランジ間の導電性は確保され
る。Therefore, first, the flange is flange A.111.
The case where a large number of adhesive groove portions L are provided on the circumference having the same diameter as the press-fitting portion K will be described. When the adhesive groove L is inserted into the inner diameter of the photoreceptor cylinder, the adhesive adhering to the entrance of the inner diameter of the photoreceptor cylinder is first pressed by the press-fitting portion connecting the adhesive groove L on the circumference. As a result, it is pushed deep into the inner diameter of the photoreceptor cylinder, but at the same time, a part of it also flows into the adhesive groove L. When the original press-fitting portion K is further press-fitted, the boundary edge portion between the adhesive groove portion L and the press-fitting portion K scrapes off the adhesive, and the scraped-down adhesive accumulates in the adhesive groove L. . When the adhesive overflows from the adhesive groove L, the adhesive flows out from the opening side of the groove to the inner diameter of the photosensitive drum. In this manner, the press-fitted portion K is press-fitted into the inner diameter of the photoreceptor cylinder. In particular, where the boundary edge between the adhesive groove L and the press-fitted portion K scrapes off the adhesive, Adhesive hardly enters between the portions K, and the conductivity between the photosensitive drum and the flange is secured.
【００２３】次に、フランジがフランジＤ・121の様に、
接着剤溝部Ｌが鍔部Ｎに続く圧入部Ｋに隣接して設けら
れている場合について説明する。この場合は、フランジ
Ａ・111の接着剤溝部Ｌと圧入部Ｋの境界エッジ部に相当
する部分が、フランジＤ・121の接着剤溝部Ｌと圧入部
Ｋとの境界エッジ部全周にわたって設けられていると考
えられ、上記と同様にフランジを感光体筒内径に圧入す
る時、感光体筒内径入口部の接着剤は、上記境界エッジ
部に掻き落され、掻き落された接着剤は接着剤溝部Ｌに
溜ることになる。そして接着剤溝部Ｌより接着剤が溢れ
た時は、接着剤は小径部Ｑより感光体筒内径へと流れ出
ることになる。この様にして、感光体筒内径に圧入部Ｋ
は圧入され、感光体筒内径と圧入部Ｋとの間に接着剤は
ほとんど入る事なく密着し、感光体筒とフランジ間の導
電性は確保される。このために本発明の構成を使えば、
接着剤としては高価な導電性接着剤ではなく、安価な通
常の非導電性接着剤を使用して接着しても、感光体筒と
導電性樹脂材を使用したフランジ間の導電性は確保され
る。Next, as shown in FIG.
The case where the adhesive groove portion L is provided adjacent to the press-fit portion K following the flange portion N will be described. In this case, a portion corresponding to the boundary edge portion between the adhesive groove L of the flange A 111 and the press-fit portion K is provided over the entire boundary edge portion between the adhesive groove L of the flange D 121 and the press-fit portion K. When the flange is pressed into the inner diameter of the photoreceptor cylinder in the same manner as described above, the adhesive at the entrance of the inner diameter of the photoreceptor cylinder is scraped off at the boundary edge, and the scraped-off adhesive is used as the adhesive. It will accumulate in the groove L. When the adhesive overflows from the adhesive groove L, the adhesive flows out from the small diameter portion Q to the inner diameter of the photosensitive drum. In this way, the press-fit portion K
Is press-fitted, the adhesive is hardly adhered between the inner diameter of the photoconductor cylinder and the press-fitted portion K, and the conductivity between the photoconductor cylinder and the flange is secured. If the configuration of the present invention is used for this purpose,
Even if an inexpensive ordinary non-conductive adhesive is used instead of an expensive conductive adhesive, the conductivity between the photoreceptor cylinder and the flange using a conductive resin material is secured. You.
【００２４】次に本実施例による具体例を示す。Next, a specific example according to this embodiment will be described.
【００２５】感光体筒外径はφ80mm、内径はφ78（−0.
03〜０）mm、材料はアルミ合金。導電性樹脂材のフラン
ジの圧入部外径はφ78（＋0.04〜＋0.09）mmで、形状が
図１のフランジＡ・111、フランジＢ・112及び図２のフ
ランジＤ・121とフランジＤ・121にギヤを設けた反対側
用のフランジを、上記感光体筒内径の入口部に非導電性
接着剤であるセメダイン製弾性エポキシ接着剤ＥＰ-001
を付着し、フランジを圧入、接着、取り付けた。その結
果は、接着剤の量に関係なく感光体筒と導電性樹脂材の
フランジは確実に導通し、良好な画像が得られた。The outer diameter of the photosensitive drum is φ80 mm and the inner diameter is φ78 (−0.
03-0) mm, material is aluminum alloy. The outer diameter of the press-fit portion of the conductive resin material flange is φ78 (+0.04 to +0.09) mm, and the shapes are the flanges A and 111 and the flanges B and 112 in FIG. 1 and the flanges D and 121 and the flange D in FIG. A flange for the opposite side provided with a gear at 121 is attached to the entrance of the inner diameter of the photoreceptor cylinder at the entrance of an elastic epoxy adhesive EP-001 made of Cemedine which is a non-conductive adhesive.
And the flange was press-fitted, glued and attached. As a result, regardless of the amount of the adhesive, the photoconductor cylinder and the flange of the conductive resin material were reliably conducted, and a good image was obtained.
【００２６】そして、次の具体例としては、上記と同じ
感光体筒に図３（ａ）、（ｂ）で示す、上記と同じ圧入
部外径を持った、導電性樹脂材のフランジＣ・113、フ
ランジＦ・123（反対側のフランジはこれらにギヤを設
けたもの）を、上記と同じ非導電性接着剤により同じ方
法で接着剤を付着し、圧入、接着、取り付けた感光体ド
ラムであった。その結果は、接着剤の量が１grを越える
と感光体筒と導電性樹脂材のフランジの導通不良が発生
した。理由は図１、図２で示す様な圧入部Ｋが無く、且
つ接着剤溝部Ｌが鍔部Ｎに隣接して設けてあるため、接
着剤が掻き落されず感光体筒内径と本部品の圧入部Ｋの
間に入り込んでしまい、接着剤の絶縁被膜を作ってしま
うためである。As a next specific example, as shown in FIGS. 3 (a) and 3 (b), a conductive resin material flange C · having the same press-fitting portion outer diameter as shown in FIGS. 113, Flange F · 123 (the opposite side flange is provided with a gear), the same non-conductive adhesive as described above, the adhesive is applied in the same manner, and press-fitted, adhered, and mounted on the photosensitive drum there were. As a result, when the amount of the adhesive exceeded 1 gr, poor conduction between the photosensitive drum and the flange of the conductive resin material occurred. The reason is that there is no press-fit portion K as shown in FIGS. 1 and 2 and the adhesive groove portion L is provided adjacent to the flange portion N. This is because it enters between the press-fitted portions K and forms an insulating coating film of the adhesive.
【００２７】[0027]
【発明の効果】本発明により、感光体筒へ導電性樹脂材
を使用したフランジを取り付けるのに、感光体筒と近似
した熱膨張係数の高価な導電性樹脂材を使用したフラン
ジの圧入でなく、安価な通常の導電性樹脂材を使用した
フランジを、高価な導電性接着剤でなく非導電性接着剤
である安価な通常の接着剤により接着、取り付けること
が出来、コストの安い感光体ドラムが提供されることと
なった。According to the present invention, mounting a flange made of a conductive resin material on a photoreceptor cylinder does not require press fitting of a flange made of an expensive conductive resin material having a thermal expansion coefficient similar to that of the photoreceptor cylinder. Inexpensive photosensitive drums that can be attached and attached to a flange using an inexpensive ordinary conductive resin material with an inexpensive ordinary adhesive that is a non-conductive adhesive instead of an expensive conductive adhesive. Will be provided.
【図１】本発明に基づく感光体ドラムの図面で、（ａ）
は感光体ドラムの全体図及び一部断面図。（ｂ）は
（ａ）の図のＸ−Ｘ断面矢視図。FIG. 1 is a drawing of a photosensitive drum according to the present invention, wherein (a)
3 is an overall view and a partial cross-sectional view of the photosensitive drum. (B) is an XX sectional arrow view of the figure of (a).
【図２】本発明に基づく別の実施例を示すフランジの
図。FIG. 2 is a view of a flange showing another embodiment according to the present invention.
【図３】（ａ），（ｂ）は良い結果とならないフランジ
の形状図。FIGS. 3 (a) and 3 (b) are views showing the shape of a flange that does not give good results.
１ 感光体ドラム 10 感光体筒 111 フランジＡ 112 フランジＢ 121 フランジＤ Ｋ 圧入部 Ｌ 接着剤溝部 Ｎ 鍔部 DESCRIPTION OF SYMBOLS 1 Photoconductor drum 10 Photoconductor cylinder 111 Flange A 112 Flange B 121 Flange DK Press-fit part L Adhesive groove part N Flange part
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平２−234184（ＪＰ，Ａ) 特開 昭61−100764（ＪＰ，Ａ) 特開 平２−254484（ＪＰ，Ａ) 特開 平３−179386（ＪＰ，Ａ) 実開 昭62−96669（ＪＰ，Ｕ) 実開 昭61−94865（ＪＰ，Ｕ) 実開 昭63−58242（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-2-234184 (JP, A) JP-A-61-100764 (JP, A) JP-A-2-254484 (JP, A) JP-A-3-234 179386 (JP, A) Japanese Utility Model 1987-96669 (JP, U) Japanese Utility Model 1986-94865 (JP, U) Japanese Utility Model 1988-1988 (JP, U)
Claims (2)
で成形したフランジを接着剤により取り付けた感光体ド
ラムにおいて、前記フランジは、前記フランジに設けた
前記感光体筒の外径より大きくなく、内径よりは大きい
径の鍔に続く前記感光体筒への圧入部と、該圧入部に隣
接して接着剤溝部とを有し、前記感光体筒内径入口部に
接着剤を付着した後に前記フランジを圧入することによ
り、前記感光体筒と前記圧入部との導通が保たれるよう
に接触し、且つ前記接着剤溝部に接着剤が入り込むこと
により前記感光体筒と前記フランジを接着し、取り付け
たことを特徴とする感光体ドラム。Side end portions of claim 1 photoconductor tube, the photosensitive drum attached with an adhesive molded flange with a conductive resin material, prior Symbol flange is outside the photosensitive body tube provided in the flange no greater than the diameter, and press-fitting portion to the photoreceptor cylinder following the flange of larger diameter than the inside diameter, adjacent to the piezoelectric join the club and an adhesive groove, the adhesive agent to the photosensitive body tube inner diameter inlet After the attachment , press-fit the flange .
Thus, conduction between the photoconductor cylinder and the press-fitting portion is maintained.
And the adhesive enters the adhesive groove.
A photosensitive drum, wherein the photosensitive drum and the flange are adhered and attached.
を特徴とする請求項１記載の感光体ドラム。2. The photosensitive drum according to claim 1, wherein the adhesive is a non-conductive adhesive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25163691A JP3198342B2 (en) | 1991-09-30 | 1991-09-30 | Photoconductor drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25163691A JP3198342B2 (en) | 1991-09-30 | 1991-09-30 | Photoconductor drum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0588595A JPH0588595A (en) | 1993-04-09 |
| JP3198342B2 true JP3198342B2 (en) | 2001-08-13 |
Family
ID=17225771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25163691A Expired - Fee Related JP3198342B2 (en) | 1991-09-30 | 1991-09-30 | Photoconductor drum |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3198342B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6518665B1 (en) | 1997-07-11 | 2003-02-11 | Delaware Capital Formation, Inc. | Enhanced underfill adhesion |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5214334B2 (en) * | 2008-05-29 | 2013-06-19 | タイガースポリマー株式会社 | Electrophotographic photoreceptor |
| JP5441383B2 (en) * | 2008-09-30 | 2014-03-12 | キヤノン株式会社 | Photosensitive drum unit and electrophotographic apparatus |
| JP4957754B2 (en) * | 2009-06-19 | 2012-06-20 | 富士ゼロックス株式会社 | Drive transmission component, drive transmission mechanism using the same, driven device, and drive processing device |
| CN202106691U (en) * | 2011-06-23 | 2012-01-11 | 珠海天威飞马打印耗材有限公司 | Driving gear for printer |
-
1991
- 1991-09-30 JP JP25163691A patent/JP3198342B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6518665B1 (en) | 1997-07-11 | 2003-02-11 | Delaware Capital Formation, Inc. | Enhanced underfill adhesion |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0588595A (en) | 1993-04-09 |
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