JPS60222881A - Drum holding device - Google Patents

Drum holding device

Info

Publication number
JPS60222881A
JPS60222881A JP7968884A JP7968884A JPS60222881A JP S60222881 A JPS60222881 A JP S60222881A JP 7968884 A JP7968884 A JP 7968884A JP 7968884 A JP7968884 A JP 7968884A JP S60222881 A JPS60222881 A JP S60222881A
Authority
JP
Japan
Prior art keywords
drum
shaft
flange
elastic member
photosensitive drum
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
JP7968884A
Other languages
Japanese (ja)
Inventor
Yoshio Inoue
義雄 井上
Fumio Furusawa
文夫 古沢
Harumitsu Mizuishi
水石 春光
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.)
Fujifilm Business Innovation Corp
Original Assignee
Fuji Xerox Co Ltd
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 Fuji Xerox Co Ltd filed Critical Fuji Xerox Co Ltd
Priority to JP7968884A priority Critical patent/JPS60222881A/en
Publication of JPS60222881A publication Critical patent/JPS60222881A/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 suppress the play, to reduce an unnecessary vibration of a drum, and to obtain a good copy picture by fitting a shaft to a drum flange by interposing an elastic member. CONSTITUTION:An elastic member 12 is stuck and fixed to one flange 11 of a photosensitive drum 10, and its hole 13 is formed so as to be smaller than the outside diameter of a drum shaft 14. When the drum shaft 14 is inserted from the other flange 15 side and also inserted by force into the hole 13 of the elastic member, a part of its shaft is deformed and pushed into a recessed part 11-0 of the flange 11 and the shaft 14 is held firmly. Accordingly, the play between the shaft 14 and the flange is eliminated, an unnecessary vibration of the photosensitive drum 10 is reduced and a good copy picture can be obtained.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は複写機の感光ドラムを保持するドラム保持装置
に係り、特に感光ドラムに対するトルク変動にもかかわ
らずその回転をほぼ一定状態に保つことができるドラム
保持装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drum holding device that holds a photosensitive drum of a copying machine, and in particular, to a drum holding device that holds a photosensitive drum of a copying machine, and particularly to a device that maintains the rotation of the photosensitive drum in a substantially constant state despite torque fluctuations. This invention relates to a drum holding device that can hold a drum.

〔従来技術〕[Prior art]

電子複写機では、例えばセレン層で構成した感光ドラム
に潜像を形成させこの潜像を現像して用紙上にこの現像
を転写することによりコピーを得ている。この場合、感
光ドラムの回転にむらがあれば形成された潜像が歪み、
正確なコピーが得られない。
In electronic copying machines, copies are obtained by forming a latent image on a photosensitive drum made of, for example, a selenium layer, developing this latent image, and transferring the developed image onto paper. In this case, if the rotation of the photosensitive drum is uneven, the formed latent image will be distorted.
I can't get an exact copy.

したがって、従来では、第1図(a)、(b)に示を如
<、s光ドラム1のドラムフランジ2に一部切欠した円
形のシャフト穴3を形成し、これと合致する先端部を有
するドラムシャフト4をこのシャフト穴3に挿入したり
、あるいは第2図(a)、(b)に示す如く、ドラムフ
ランジ2′に両側部が突出した形状の円形穴3′を形成
してこれに合致した突部を有するドラムシャフトを使用
して、ドラムシャフトと感光ドラムとを緊密に結合し、
ドラムシャフトを図示省略したモータで均一に回転させ
ることにより感光ドラムをこれまた均一に回転させてい
た。
Therefore, conventionally, as shown in FIGS. 1(a) and 1(b), a partially cut out circular shaft hole 3 is formed in the drum flange 2 of the optical drum 1, and a tip portion that matches the shaft hole 3 is formed. Insert the drum shaft 4 with the drum shaft 4 into the shaft hole 3, or form a circular hole 3' with protruding sides on the drum flange 2' as shown in FIGS. 2(a) and 2(b). The drum shaft and the photosensitive drum are tightly coupled using a drum shaft having a protrusion that matches the
By uniformly rotating the drum shaft with a motor (not shown), the photosensitive drum was also rotated uniformly.

ところで感光ドラム1には、複写工程中にブレードと接
触したり、現4象器と接触したりする等の理由によるト
ルク変動のため、第3図に示す如(正規なスピードをS
oとしたときにわずかな速度変動がある。これは前記の
如き従来のドラムフランジとドラムシャフトの嵌合方式
ではこれらを単純に嵌合させていたため、両者の嵌合部
を精密加工してもわずかにガタが存在し、トルク変動に
もとづき感光ドラムがこのガタ範囲で動きドラム振動等
を生ずることによる。
By the way, the photosensitive drum 1 is subject to torque fluctuations due to reasons such as contact with the blade or imager during the copying process, so as shown in FIG.
There is a slight speed fluctuation when the speed is set to o. This is because in the conventional method of fitting the drum flange and drum shaft as described above, they were simply fitted, so even if the fitting part of the two was precisely machined, there was a slight play, and due to torque fluctuations, the photosensitive This is because the drum moves within this play range, causing drum vibration.

このような回転むらが存在すると、第4図(a)に示す
如き多数の細線をコピーするときに同(b)に示す如く
、細幅か不均一になったり、第4図(C)に示す如き文
字が(d)に示す如く一部欠けた状態でコピーされるこ
とになり、コピー画像の品位を低下させることになる。
If such rotational unevenness exists, when copying a large number of thin lines as shown in Figure 4(a), the width may become narrow or uneven as shown in Figure 4(b), or the width may become narrow or uneven as shown in Figure 4(C). The characters shown in FIG. 2 are copied with some parts missing as shown in (d), which deteriorates the quality of the copied image.

〔発明の目的〕[Purpose of the invention]

本発明の目的は前記の如き感光ドラムのわずかな回転変
動の発生を抑制して、極めて良好なコピー画像が得られ
るドラム保持装置を提供することである。
SUMMARY OF THE INVENTION An object of the present invention is to provide a drum holding device that suppresses the occurrence of slight rotational fluctuations of the photosensitive drum as described above and can obtain extremely good copy images.

〔発明の構成〕[Structure of the invention]

前記目的を達成するために、本発明ではドラムシャツ1
−と感光ドラムのドラムフランジ部分を嵌合するとき弾
性部材を介して嵌合させるようにそのドラム保持装置を
構成する。
In order to achieve the above object, the present invention provides a drum shirt 1.
- The drum holding device is configured so that when the drum flange portion of the photosensitive drum is fitted together, the drum flange portion of the photosensitive drum is fitted through an elastic member.

これによりドラムシャフトとドラムフランジのガタを抑
えることができるので、感光ドラムの不要な振動を低減
させ正確なドラム回転を行うことができる。
This makes it possible to suppress play between the drum shaft and the drum flange, thereby reducing unnecessary vibrations of the photosensitive drum and allowing accurate drum rotation.

〔発明の実施例〕[Embodiments of the invention]

本発明の一実施例を第5図にもとづき説明する。 An embodiment of the present invention will be described based on FIG.

第5図(a)はドラムシャフトとドラムフランジの挿入
状態説明図、同(b)は感光ドラムの構成状態を示す断
面図である。
FIG. 5(a) is an explanatory view of the inserted state of the drum shaft and drum flange, and FIG. 5(b) is a sectional view showing the configuration of the photosensitive drum.

第5図において、10は感光ドラムであり第1図におけ
る感光ドラム1に対応するもの、11はドラムフランジ
であってドラムフランジ2に対応するもの、12は天然
ゴムやポリウレタンゴムの如き合成ゴム製の弾性部材で
あってその中心部分に例えば円状のシャツl−穴13が
形成されている。
In FIG. 5, 10 is a photosensitive drum which corresponds to the photosensitive drum 1 in FIG. 1, 11 is a drum flange which corresponds to drum flange 2, and 12 is made of synthetic rubber such as natural rubber or polyurethane rubber. This elastic member has, for example, a circular shirt L-hole 13 formed in its center.

14はドラムシャフトであってドラムシャフト4に対応
するもの、15はドラムフランジ、16はボルト、17
はナツトである。
14 is a drum shaft corresponding to drum shaft 4; 15 is a drum flange; 16 is a bolt; 17
is Natsuto.

ドラムフランジ11には中心部分にシャフト穴13が形
成された弾性部材12が、例えば貼りつけにより固着さ
れている。勿論固着手段は機械的な固着手段でもよい。
An elastic member 12 having a shaft hole 13 formed in the center thereof is fixed to the drum flange 11 by, for example, pasting. Of course, the fixing means may be mechanical fixing means.

このシャフト穴13の形状はドラムシャフト外径よりも
小さい円形穴である。
The shape of this shaft hole 13 is a circular hole smaller than the outer diameter of the drum shaft.

また第5図(b)に示す如く、ドラムフランジ11には
凹部11−0が形成されている。感光ドラム10は、第
5図(b)に示す如く、その両端部分にドラムフランジ
11.15が挿入され、適宜数のボルト16とナツト1
7によりこの感光ドラム10とドラムフランジ11−1
5が一体化される。この一体化した状態でドラムフラン
ジ15よりドラムシャフト14を挿入し、さらにこのド
ラムシャフト14を前記弾性部材12のシャフト穴13
に挿入すれば、弾性部材12の一部は凹部11−0に変
形して挿入しドラムシャフト14の挿入を容易に行うこ
とができる。このようにしてドラムシャフト14が弾性
部材12のシャフト穴13を経由してドラムフランジ1
1と係合するとき、前記シャフト穴13の大きさはドラ
ムシャフト14の外径より小さく形成されているためこ
の弾性部材12がドラムシャフト14を押える力を発生
ずることになりドラムシャフト14と弾性部材12とは
ガタなくしっかりと結合されることになる。
Further, as shown in FIG. 5(b), a recess 11-0 is formed in the drum flange 11. As shown in FIG. 5(b), the photosensitive drum 10 has drum flanges 11.15 inserted at both ends thereof, and an appropriate number of bolts 16 and nuts 1.
7, this photosensitive drum 10 and drum flange 11-1
5 are integrated. In this integrated state, the drum shaft 14 is inserted through the drum flange 15, and the drum shaft 14 is inserted into the shaft hole 13 of the elastic member 12.
When the drum shaft 14 is inserted into the recess 11-0, a part of the elastic member 12 is deformed and inserted into the recess 11-0, and the drum shaft 14 can be easily inserted. In this way, the drum shaft 14 passes through the shaft hole 13 of the elastic member 12 to the drum flange 1.
1, since the size of the shaft hole 13 is smaller than the outer diameter of the drum shaft 14, this elastic member 12 generates a force to press the drum shaft 14, and the drum shaft 14 and elastic It will be firmly connected to the member 12 without any looseness.

このため感光ドラムに対するトルク変動があっても感光
ドラムはドラムシャフトとガタなくきわめて緊密に結合
しているので、感光ドラムが回転むらを生ずることはな
い。
Therefore, even if there is a fluctuation in the torque applied to the photosensitive drum, the photosensitive drum is extremely tightly coupled to the drum shaft without any play, so that the photosensitive drum does not rotate unevenly.

なおドラムシャフトとドラムフランジをガタなく結合さ
せる手段としては、第6図に示す如くドラムシャフトと
ドラムフランジの挿入部分に板バネ20等の弾性部材を
配置してもよい。
In addition, as a means for coupling the drum shaft and the drum flange without play, an elastic member such as a leaf spring 20 may be arranged at the insertion portion of the drum shaft and the drum flange, as shown in FIG.

このようにして弾性部材によりガタを無くすることがで
きるとともに、ドラムシャフトとドラムフランジの位置
はこれらの機械的精度により従来の通り決定することが
できるので、弾性部材を使用しても位置が狂うようなこ
とはなく、しかもガタのみ無くずことができるので、コ
ピー品質のすぐれた複写機を提供することができる。
In this way, the elastic member can eliminate looseness, and the positions of the drum shaft and drum flange can be determined as before with their mechanical precision, so even if the elastic member is used, the position will not be out of place. This does not occur, and since only the looseness can be eliminated, a copying machine with excellent copy quality can be provided.

〔発明の効果〕〔Effect of the invention〕

本発明によれば、コピー画像品質の低下の原因になって
いたトルク変動にもとづく感光ドラムの回転むらの発生
や感光ドラムの不要な振動を、弾性部材の使用というき
わめて簡単な手段により非常に低減することができ、正
確なドラム回転を得ることができ、この結果コピー品質
のすぐれた複写機を提供することができる。
According to the present invention, the occurrence of uneven rotation of the photosensitive drum due to torque fluctuations and unnecessary vibration of the photosensitive drum, which were causes of deterioration in copy image quality, can be significantly reduced by using an extremely simple means of using an elastic member. Therefore, accurate drum rotation can be obtained, and as a result, a copying machine with excellent copy quality can be provided.

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

第1図、第2図は従来の感光ドラム保持状態説明図、第
3図、第4図は従来の複写機における問題点説明図、第
5図は本発明の一実施例構成図、第6図は本発明の他の
実施例構成図である。 1−感光ドラム 2− ドラムフランジ3− シャフト
穴 4− ドラムシャフト1〇−感光ドラム 11− 
ドラムフランジ12−弾性部材 13−シャフト穴 14− ドラムシャフト 15− ドラムフランジ16
−ボルト 17−ナツト 2〇−板バネ 特許出願人 富士ゼロックス株式会社 代理人 弁理士 山 谷 晧 榮
FIGS. 1 and 2 are illustrations of conventional photosensitive drum holding states, FIGS. 3 and 4 are illustrations of problems in conventional copying machines, FIG. 5 is a configuration diagram of an embodiment of the present invention, and FIG. The figure is a configuration diagram of another embodiment of the present invention. 1-Photosensitive drum 2-Drum flange 3-Shaft hole 4-Drum shaft 1〇-Photosensitive drum 11-
Drum flange 12 - Elastic member 13 - Shaft hole 14 - Drum shaft 15 - Drum flange 16
- Bolt 17 - Nut 20 - Leaf spring patent applicant Fuji Xerox Co., Ltd. agent Patent attorney Akira Yamatani

Claims (1)

【特許請求の範囲】[Claims] 感光ドラムを保持するドラムフランジと、この感光ドラ
ムに回転を与えるドラムシャフトを嵌合させた複写機に
おいて、ドラムシャフトとドラムフランジの間に弾性部
材を配置して前記ドラムシャフトとドラムフランジを嵌
合させたことを特徴とするドラム保持装置。
In a copying machine in which a drum flange that holds a photosensitive drum is fitted with a drum shaft that rotates the photosensitive drum, an elastic member is disposed between the drum shaft and the drum flange to fit the drum shaft and the drum flange. A drum holding device characterized by:
JP7968884A 1984-04-20 1984-04-20 Drum holding device Pending JPS60222881A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7968884A JPS60222881A (en) 1984-04-20 1984-04-20 Drum holding device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7968884A JPS60222881A (en) 1984-04-20 1984-04-20 Drum holding device

Publications (1)

Publication Number Publication Date
JPS60222881A true JPS60222881A (en) 1985-11-07

Family

ID=13697140

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7968884A Pending JPS60222881A (en) 1984-04-20 1984-04-20 Drum holding device

Country Status (1)

Country Link
JP (1) JPS60222881A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0322272U (en) * 1989-07-11 1991-03-07

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0322272U (en) * 1989-07-11 1991-03-07

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