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JPH03140989A - Image forming device - Google Patents

Image forming device

Info

Publication number
JPH03140989A
JPH03140989A JP1278703A JP27870389A JPH03140989A JP H03140989 A JPH03140989 A JP H03140989A JP 1278703 A JP1278703 A JP 1278703A JP 27870389 A JP27870389 A JP 27870389A JP H03140989 A JPH03140989 A JP H03140989A
Authority
JP
Japan
Prior art keywords
photosensitive drum
image
vibration
image carrier
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
JP1278703A
Other languages
Japanese (ja)
Inventor
Toshiyuki Kurisu
栗栖 敏行
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP1278703A priority Critical patent/JPH03140989A/en
Publication of JPH03140989A publication Critical patent/JPH03140989A/en
Pending legal-status Critical Current

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  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)
  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To prevent resonant from occurring by providing a damping device for damping the vibration of an image carrier at the time of rotating. CONSTITUTION:A photosensitive drum 2 functioning as the image carrier is rotatably provided in a main body 1 and an electrostatic charger 3, an exposing part 4, a developing device 5, transfer and separation chargers 6 and 7, a cleaning device 8, and a static eliminator 9 are disposed on the periphery part of the drum 2. A driving gear 31 is attached to one end of the drum 2 and a flange 32 is attached to the other end side. Then, chloroprene rubber 33 as the damping means is stuck to the inner surface part of the flange 32 so that torsional vibration energy of the drum 2 at the time of rotating is made scattered and lost to lower a signal level. Thus, the resonant is prevented from occurring.

Description

【発明の詳細な説明】 [発明の目的] (産業上の利用分野) 本発明はたとえば、電子複写機として適用される画像形
成装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an image forming apparatus used as, for example, an electronic copying machine.

(従来の技術) 電子複写機は回転自在な感光ドラム(像担持体)上に原
稿像に対応した静電潜像を形成し、この静電潜像に現像
器で現像剤を供給して現像し、この現像剤像を用紙に転
写させたのち、感光ドラム上に残留した現像剤を清掃装
置のクリーニングブレード(清掃部材)により掻き取り
除去するようになっている。
(Prior Art) An electronic copying machine forms an electrostatic latent image corresponding to a document image on a freely rotatable photosensitive drum (image carrier), and develops the electrostatic latent image by supplying developer to this electrostatic latent image using a developing device. After this developer image is transferred to paper, the developer remaining on the photosensitive drum is scraped off by a cleaning blade (cleaning member) of a cleaning device.

ところで、上記感光ドラムはその一端部側から駆動力を
受けて回転するようになっており、このとき、高周波の
固有振動数を有する回転方向の捩じり振動が発生する。
Incidentally, the photosensitive drum is rotated by receiving a driving force from one end thereof, and at this time, torsional vibration in the direction of rotation having a high natural frequency is generated.

また、上記感光ドラムのクリーニング時には、感光ドラ
ムとクリーニングブレード間で摩擦による振動が発生す
る。
Furthermore, when cleaning the photosensitive drum, vibrations occur due to friction between the photosensitive drum and the cleaning blade.

(発明が解決しようとする課題) しかしながら、従来においては、上記感光ドラムとクリ
ーニングブレード間の摩擦振動が感光ドラムの捩じり振
動を励振し、あるゲインを越えると感光ドラムの捩じり
振動の固有振動数と同じ周波数を有する音(高周波数)
となり、騒音が発生する。
(Problem to be Solved by the Invention) However, in the past, the frictional vibration between the photosensitive drum and the cleaning blade excites the torsional vibration of the photosensitive drum, and when a certain gain is exceeded, the torsional vibration of the photosensitive drum excites the torsional vibration of the photosensitive drum. Sound with the same frequency as the natural frequency (high frequency)
As a result, noise is generated.

そこで、本発明は像担持体と清掃部材との摩擦振動が像
担持体に作用しても、像担持体から騒音を発生させるこ
とのないようにした画像形成装置を提供することを目的
とする。
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an image forming apparatus that does not generate noise from an image carrier even if frictional vibrations between the image carrier and a cleaning member act on the image carrier. .

[発明の構成] (課題を解決するための手段) この発明は上記課題を解決するため、回転自在に設けた
像担持体に現像剤像を形成し、この現像剤像を被転写材
に転写させたのち、前記像担持体上に残留した現像剤を
清掃部材により掻取り除去する画像形成装置において、
前記像担持体に該像担持体の回転時の振動を制振させる
割振手段を設けたことを特徴とするものである。
[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention forms a developer image on a rotatably provided image carrier, and transfers this developer image to a transfer material. In the image forming apparatus, the developer remaining on the image carrier is scraped off by a cleaning member,
The present invention is characterized in that the image carrier is provided with an allocation means for damping vibrations during rotation of the image carrier.

(作用) 上記制振手段により、像担持体の回転時における捩じれ
振動エネルギーを逸散させて振動レベルを低下させ、共
鳴音の発生を防止する。
(Function) The vibration damping means dissipates torsional vibration energy during rotation of the image carrier, lowers the vibration level, and prevents generation of resonance sound.

(実施例) 以下、本発明を図面に示す一実施例を参照して説明する
(Example) The present invention will be described below with reference to an example shown in the drawings.

第2図は電子複写機を示すもので、図中1は複写機本体
である。この複写機本体1内には像担持体としての感光
ドラム2が回転自在に設けられ、この感光ドラム2の周
囲部にはその回転方向に沿って順次、帯電器3、露光部
4、現像器5、転写、剥離チャージャー6.7、クリー
ニングブレード(清掃部材)を有したクリーニング装置
8および除電器9が配設されている。
FIG. 2 shows an electronic copying machine, and numeral 1 in the figure is the main body of the copying machine. A photosensitive drum 2 as an image carrier is rotatably provided in the copying machine main body 1, and a charger 3, an exposure section 4, a developing device are arranged around the photosensitive drum 2 sequentially along the direction of rotation. 5, a transfer/peel charger 6, 7, a cleaning device 8 having a cleaning blade (cleaning member), and a static eliminator 9 are provided.

また、上記複写機本体1内の下部側には搬送路10が設
けられ、この搬送路1oには用紙Pの搬送方向に沿って
順次、給紙ローラ11、レジストローラ12、上記転写
、剥離チャージャー6.7、搬送ベルト13、定着装置
14および排紙ローラ26が配設されている。
Further, a conveyance path 10 is provided at the lower side of the copying machine main body 1, and this conveyance path 1o sequentially includes a paper feed roller 11, a registration roller 12, the transfer and peeling chargers along the conveyance direction of the paper P. 6.7, a conveyor belt 13, a fixing device 14, and a paper discharge roller 26 are provided.

また、上記複写機本体1内の上部側には露光系15が設
けられている。この露光系15は露光ランプ16、第1
乃至第3のミラー17〜19、レンズ20、第4のミラ
ー21により構成されている。前記露光ランプ16およ
び第1のミラー17は図示しない第1のキャリッジに搭
載され、上記第2および第3のミラー18.19は第2
のキャリッジに搭載されている。上記第1および第2の
キャリッジは原稿台22に沿って移動自在に設けられ、
第2のキャリッジは第1のキャリジの速度の1/2の速
度で同方向に移動・されるようになっている。
Further, an exposure system 15 is provided on the upper side of the copying machine main body 1. This exposure system 15 includes an exposure lamp 16, a first
It is composed of third mirrors 17 to 19, a lens 20, and a fourth mirror 21. The exposure lamp 16 and the first mirror 17 are mounted on a first carriage (not shown), and the second and third mirrors 18 and 19 are mounted on a second carriage (not shown).
mounted on the carriage. The first and second carriages are provided movably along the document table 22,
The second carriage is moved in the same direction at half the speed of the first carriage.

さらに、上記複写機本体1の一側部には給紙力セラ)2
3,24が挿脱自在に装着され、他側部には排紙トレイ
25が設けられている。
Further, on one side of the copying machine main body 1, there is provided a paper feed force sensor) 2.
3 and 24 are removably attached, and a paper discharge tray 25 is provided on the other side.

ところで、上記感光ドラム2の一端部には第1図に示す
ように、駆動ギヤ31が取り付けられている。この駆動
ギヤ31には図示しない駆動機構が接続され、この駆動
機構により、前記駆動ギヤ31が回転され感光ドラム2
が回転駆動されるようになっている。
Incidentally, a drive gear 31 is attached to one end of the photosensitive drum 2, as shown in FIG. A drive mechanism (not shown) is connected to this drive gear 31, and this drive mechanism rotates the drive gear 31 and rotates the photosensitive drum 2.
is designed to be rotationally driven.

また、上記感光ドラム2の他端部側には、フランジ32
が取り付けられ、このフランジ32の内面部には割振手
段としてのクロロブレンラバーゴム(以下CRゴムとい
う)33が貼着されている。
Further, a flange 32 is provided on the other end side of the photosensitive drum 2.
is attached, and chloroprene rubber rubber (hereinafter referred to as CR rubber) 33 is stuck to the inner surface of this flange 32 as an allocation means.

上記フランジ32は感光ドラム2に圧入されて強固に取
り付けられ、その振動は感光ドラム2にの振動とは位相
差を持たないようになっている。
The flange 32 is press-fitted into the photosensitive drum 2 and firmly attached, so that its vibration has no phase difference with the vibration of the photosensitive drum 2.

しかして、画像形成時には露光ランプ16により原稿台
22上の原稿に光が照射され、原稿からの反射光が第1
乃至第3の反射ミラー17〜19、さらに、レンズ20
および第4の反射ミラー21を介して感光ドラム2の表
面に結像される。感光ドラム2の表面は帯電器3により
帯電されており、原稿の静電潜像が形成される。この静
電潜像は感光ドラム2の回転により現像器5に送られ、
この現像器5からトナーが供給されることにより現像さ
れる。
During image formation, the exposure lamp 16 irradiates light onto the original on the original platen 22, and the light reflected from the original is reflected from the original.
The third reflecting mirrors 17 to 19, and the lens 20
An image is formed on the surface of the photosensitive drum 2 via the fourth reflecting mirror 21. The surface of the photosensitive drum 2 is charged by a charger 3, and an electrostatic latent image of the original is formed thereon. This electrostatic latent image is sent to the developing device 5 by the rotation of the photosensitive drum 2.
Developing is performed by supplying toner from the developing device 5.

一方、このときには、給紙カセット23あるいは24か
ら給紙ローラー1により用紙Pが取り出されレジストロ
ーラー2を介して感光ドラム2と転写チャージャー6と
の間に送られ、画像が転写される。この画像が転写され
た用紙Pは剥離チャージャー7の作用により感光ドラム
2から剥離される。そして、この剥離された用紙Pは定
着装置14に送られ、ここで画像が定着されたのち、排
紙トレイ25上に排紙される。
On the other hand, at this time, the paper P is taken out by the paper feed roller 1 from the paper feed cassette 23 or 24 and sent between the photosensitive drum 2 and the transfer charger 6 via the registration roller 2, and the image is transferred thereto. The paper P to which this image has been transferred is peeled off from the photosensitive drum 2 by the action of the peeling charger 7. Then, this peeled paper P is sent to the fixing device 14, where the image is fixed, and then the paper is discharged onto the paper discharge tray 25.

また、上記用紙Pに対する画像転写後に感光ドラム2上
に残留したトナーtはクリーニング装置8のクリーニン
グブレード8aにより掻き落とされて除去される。しか
るのち、除電器9により、感光ドラム2上の電荷が除電
されて均一の電位にされ、次のプロセスに備える。
Furthermore, the toner t remaining on the photosensitive drum 2 after the image transfer to the paper P is scraped off and removed by the cleaning blade 8a of the cleaning device 8. Thereafter, the electric charge on the photosensitive drum 2 is removed by the static eliminator 9, and the photosensitive drum 2 is brought to a uniform potential in preparation for the next process.

ところで、上記感光ドラム2の回転時には、感光ドラム
2は一定の固有振動数を有するモードの捩じり振動が発
生する。
By the way, when the photosensitive drum 2 rotates, torsional vibration in a mode having a certain natural frequency is generated in the photosensitive drum 2.

また、このとき、クリーニングブレード8aと感光ドラ
ム2との摩擦により摩擦振動が発生する。
Further, at this time, frictional vibrations are generated due to friction between the cleaning blade 8a and the photosensitive drum 2.

この摩擦振動は感光ドラム2の固有振動数を励振しよう
とする。しかしながら、感光ドラム2のフランジ32に
は上記したようにCRゴム33が貼着されているため、
CRゴム33の内部損失により、感光ドラム2の捩じり
振動エネルギーが逸散し、共振点における振動レベルが
押え込まれる。
This frictional vibration attempts to excite the natural frequency of the photosensitive drum 2. However, since the CR rubber 33 is attached to the flange 32 of the photosensitive drum 2 as described above,
Due to the internal loss of the CR rubber 33, the torsional vibration energy of the photosensitive drum 2 is dissipated, and the vibration level at the resonance point is suppressed.

したがって、感光ドラムの自励振動が規制され、共鳴音
の発生が防止されることになる。
Therefore, self-excited vibration of the photosensitive drum is regulated, and generation of resonance noise is prevented.

なお、第3図(a)は従来、第3図(b)は本発明の感
光ドラム2の捩じり振動の周波数分析結果を示すもので
あり、この感光ドラム2の場合、9025Hzの固有振
動数があり、従来と比較して振動レベルが低下している
Note that FIG. 3(a) shows the frequency analysis results of the torsional vibration of the conventional photosensitive drum 2, and FIG. 3(b) shows the frequency analysis results of the torsional vibration of the photosensitive drum 2 of the present invention. The vibration level is lower than before.

また、本発明は上記一実施例に限られるものではなく、
第4図に示すように、フランジ32の内面に両面テープ
41を介して板金製の錘42を取り付けるようにしても
よい。
Furthermore, the present invention is not limited to the above-mentioned example,
As shown in FIG. 4, a weight 42 made of sheet metal may be attached to the inner surface of the flange 32 with a double-sided tape 41.

上記両面テープ41はそれ自体、内部損失を持っており
、上記錘42は感光ドラム2と位相差を持った振動を行
う。これにより、感光ドラム2の自体の振動を打ち消さ
れて自励振動が防止される。
The double-sided tape 41 itself has internal loss, and the weight 42 vibrates with a phase difference from the photosensitive drum 2. This cancels out the vibration of the photosensitive drum 2 itself and prevents self-excited vibration.

また、第5図に示すように、フランジ32の内面にワッ
シャー付きネジ51により発泡CRゴム(硬度150)
52を取り付けるようにしてもよい。
Further, as shown in FIG. 5, foamed CR rubber (hardness 150) is attached to the inner surface of the flange 32 by screws 51 with washers.
52 may be attached.

この場合、上記第1の実施例と基本的な作用は同じであ
るが、ワッシャー付きネジ51の締め付はトルクを調整
することにより、制振効果を発揮する周波数域をチュー
ニングすることができる。
In this case, the basic operation is the same as in the first embodiment, but by adjusting the tightening torque of the washer-equipped screw 51, the frequency range in which the damping effect is exerted can be tuned.

なお、制振手段としては、振動系に適当な正減衰を与え
ることができる部材であれば良い。
Note that the damping means may be any member as long as it can provide appropriate positive damping to the vibration system.

代表的な制振部材としてはブチル、NBR。Typical damping materials include butyl and NBR.

などの防振ゴムがあるが、この発明においては、CRゴ
ム、発泡CRゴム、通常の両面テープ等のある程度の内
部損失を持った材質でも効果を発揮できる。
There are anti-vibration rubbers such as, but the present invention can also be effective with materials that have a certain degree of internal loss, such as CR rubber, foamed CR rubber, and ordinary double-sided tape.

[発明の効果] 以上説明したように、本発明によれば、像担持体の自励
振動を規制でき、共鳴音の発生を防止して騒音を低下で
きるという効果を奏するものである。
[Effects of the Invention] As described above, according to the present invention, it is possible to control the self-excited vibration of the image carrier, prevent the generation of resonance sound, and reduce noise.

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

図面は本発明の一実施例を示すもので、第1図は感光ド
ラムを分解して示す斜視図、第2図は電子複写機を示す
概略的構成図、第3図は感光ドラムの振動レベルを従来
と比較して示すグラフ図、第4図は本発明の第1の他の
実施例を示す斜視図、第5図は本発明の第2の他の実施
例を示す斜視図である。 2・・・像担持体(感光ドラム)、8a・・・クリニン
グブレード(清掃部材)、P・・・用紙(被転写材) 
 33.52・・・CRゴム(制振手段)41・・・両
面テープ(制振手段)、42・・・錘(割振手段)、5
1・・・ワッシャ付きネジ(制振手段)。
The drawings show one embodiment of the present invention, in which Fig. 1 is an exploded perspective view of a photosensitive drum, Fig. 2 is a schematic configuration diagram showing an electronic copying machine, and Fig. 3 shows the vibration level of the photosensitive drum. FIG. 4 is a perspective view showing a first alternative embodiment of the present invention, and FIG. 5 is a perspective view showing a second alternative embodiment of the present invention. 2... Image carrier (photosensitive drum), 8a... Cleaning blade (cleaning member), P... Paper (transferring material)
33.52... CR rubber (vibration damping means) 41... Double-sided tape (vibration damping means), 42... Weight (distribution means), 5
1...Screw with washer (vibration damping means).

Claims (1)

【特許請求の範囲】[Claims] 回転自在に設けた像担持体に現像剤像を形成し、この現
像剤像を被転写材に転写させたのち、前記像担持体上に
残留した現像剤を清掃部材により掻取り除去する画像形
成装置において、前記像担持体に該像担持体の回転時の
振動を制振させる制振手段を設けたことを特徴とする画
像形成装置。
Image formation in which a developer image is formed on a rotatably provided image carrier, the developer image is transferred to a transfer material, and then the developer remaining on the image carrier is scraped off with a cleaning member. An image forming apparatus characterized in that the image bearing member is provided with a vibration damping means for damping vibrations during rotation of the image bearing member.
JP1278703A 1989-10-27 1989-10-27 Image forming device Pending JPH03140989A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1278703A JPH03140989A (en) 1989-10-27 1989-10-27 Image forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1278703A JPH03140989A (en) 1989-10-27 1989-10-27 Image forming device

Publications (1)

Publication Number Publication Date
JPH03140989A true JPH03140989A (en) 1991-06-14

Family

ID=17601013

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1278703A Pending JPH03140989A (en) 1989-10-27 1989-10-27 Image forming device

Country Status (1)

Country Link
JP (1) JPH03140989A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0585897A1 (en) * 1992-09-02 1994-03-09 Konica Corporation Driving apparatus for a rotary body in use with an image forming apparatus
JPH07199731A (en) * 1993-12-28 1995-08-04 Nec Corp Electrophotographic printer
JPH07319328A (en) * 1994-05-30 1995-12-08 Nec Corp Vibration proofing device for photoreceptor drum

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0585897A1 (en) * 1992-09-02 1994-03-09 Konica Corporation Driving apparatus for a rotary body in use with an image forming apparatus
JPH07199731A (en) * 1993-12-28 1995-08-04 Nec Corp Electrophotographic printer
JPH07319328A (en) * 1994-05-30 1995-12-08 Nec Corp Vibration proofing device for photoreceptor drum

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