JPH01282567A - Device for driving and stabilizing photosensitive body - Google Patents
Device for driving and stabilizing photosensitive bodyInfo
- Publication number
- JPH01282567A JPH01282567A JP63112238A JP11223888A JPH01282567A JP H01282567 A JPH01282567 A JP H01282567A JP 63112238 A JP63112238 A JP 63112238A JP 11223888 A JP11223888 A JP 11223888A JP H01282567 A JPH01282567 A JP H01282567A
- Authority
- JP
- Japan
- Prior art keywords
- inertial member
- photoreceptor
- gear
- driving
- shaft
- 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
Links
- 230000000087 stabilizing effect Effects 0.000 title claims description 6
- 108091008695 photoreceptors Proteins 0.000 claims description 26
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［技術分野］
本発明は複写機、プリンター、ファクシミリ等で使用さ
れる電子写真感光体の駆動を安定化させるために用いる
感光体駆動安定化装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a photoconductor drive stabilizing device used to stabilize the drive of an electrophotographic photoconductor used in copying machines, printers, facsimile machines, and the like.
［従来技術］
複写機等で潜像保持体として用いられる感光体ドラムは
、正確に潜像を形成させる上で駆動を安定化させること
が重要である。しかし、取付公差や経年変化等により回
転むらが起り、この回転むらによりジター（ｊｉｔｔｅ
ｒ）が発生することがあるため、画像ぶれ等の異常画像
を発生させる虞がある。[Prior Art] In order to accurately form a latent image, it is important to stabilize the driving of a photosensitive drum used as a latent image holder in a copying machine or the like. However, rotational unevenness occurs due to installation tolerances and aging, and this rotational unevenness causes jitter.
r) may occur, which may cause abnormal images such as image blur.
上記感光体ドラムの回転むらを防止するための一手段と
して、従来、上記感光体ドラムの外部にフライホイール
を設けた方式がある。一般に、フライホイールは、その
慣性モーメントを利用して回転速度の変動を平均化し、
又、多足のエネルギーを保有させることができるものと
して知られている。したがって、このフライホイールの
慣性モーメン１〜により、感光体ドラムの駆動を安定化
させることができる。As one means for preventing uneven rotation of the photoreceptor drum, there has conventionally been a method in which a flywheel is provided outside the photoreceptor drum. Generally, a flywheel uses its moment of inertia to average out fluctuations in rotational speed.
It is also known to be able to hold multiple legs of energy. Therefore, the moment of inertia of this flywheel is 1~, which makes it possible to stabilize the drive of the photoreceptor drum.
ところが、上記慣性モーメントを大きくするためには、
慣性モーメントを１１フライホイールの半径をｒ１フラ
イホイールの速度をＷとした場合、Ｉ＝Ｗｒの関係から
、フライホイールの半径と質量を大きくしなければなら
ないため、装置が大型且つ車量化する問題があり、ｔＪ
ｓＲ：ｊ、軽量の装置には不向きであった。However, in order to increase the above moment of inertia,
If the moment of inertia is 11, the radius of the flywheel is r1, and the speed of the flywheel is W, then from the relationship I=Wr, the radius and mass of the flywheel must be increased, so there is a problem that the device becomes large and bulky. Yes, tJ
sR:j, unsuitable for lightweight equipment.
［目 的］
そこで、本発明は、小型、軽量の装置に採用できるよう
な感光体駆動安定化装置を提供しようとするものである
。[Objective] Therefore, the present invention aims to provide a photoreceptor drive stabilizing device that can be adopted in a small and lightweight device.
［構 成］
本発明は、上記目的を達成覆るために、感光体の内部に
慣性部材を配置して、感光体と慣性部材間に駆動力が伝
達されるようにし、且つ上記慣性部材が上記感光体より
大きな運動エネルギーが得られるような動力伝達系とし
てなる構成と覆る。[Structure] In order to achieve the above-mentioned objects, the present invention arranges an inertial member inside a photoreceptor so that a driving force is transmitted between the photoreceptor and the inertial member, and the inertial member The configuration is similar to that of a power transmission system that can obtain greater kinetic energy than the photoreceptor.
慣性部材の運動エネルギーが感光体の運動エネルギーよ
り大き（ＡＮられるため、感光体の駆動を安定化させる
ことができる。又、慣性部材を感光体の内部に収めたの
で、小型、軽量な装置への採用が可能となる。Since the kinetic energy of the inertial member is greater than the kinetic energy of the photoreceptor, the drive of the photoreceptor can be stabilized.Also, since the inertial member is housed inside the photoreceptor, the device can be made smaller and lighter. It becomes possible to hire
以下、本発明の実施例を図面を参照して説明する。Embodiments of the present invention will be described below with reference to the drawings.
第１図及び第２図は一実施例を示すもので、感光体ドラ
ム１の内部スペースに、所要の質量を有する中空円筒状
の慣性部材２を、上記感光体ドラム１の回転軸心と同心
となるよう回転自在に挿入配置し、且つ該慣性部材２の
軸３の一端部と上記感光体ドラム１の対応する一端部と
の間にアイドルギヤを介在させて駆動力が伝達されるよ
うにする。1 and 2 show one embodiment, in which a hollow cylindrical inertia member 2 having a required mass is placed in the internal space of a photoreceptor drum 1 and is concentric with the rotation axis of the photoreceptor drum 1. and an idle gear is interposed between one end of the shaft 3 of the inertial member 2 and a corresponding end of the photoreceptor drum 1 so that driving force is transmitted. do.
詳述すると、上記慣性部材２には、軸３の一端部に、固
定ギヤ４を設けると共に、上記感光体ドラム１には、一
端部内周に内歯ギヤ５を設け、且つ上記固定ギヤ４と内
歯ギヤ５の間には、周方向等間隔位置にアイドルギヤ６
を、上記両ギヤ４．５に同時に噛合するように３個所設
けて、該各アイドルギヤ６の軸７を固定板８に支持させ
、上記感光体ドラム１の駆動により、その回転力を内歯
ギヤ５、アイドルギヤ６、固定ギヤ４、軸３に順次伝え
て、慣性部材２が回転させられるようにする。なお、本
実施例では、内歯ギヤ５の歯数ｎ、を６０、固定ギヤ４
の歯数「）２を１２としである。Specifically, the inertial member 2 is provided with a fixed gear 4 at one end of the shaft 3, and the photosensitive drum 1 is provided with an internal gear 5 on the inner periphery of the one end. Idle gears 6 are arranged at equal intervals in the circumferential direction between the internal gears 5.
are provided at three locations so as to mesh with both gears 4.5 at the same time, and the shaft 7 of each idle gear 6 is supported by a fixed plate 8, and by driving the photosensitive drum 1, the rotational force is transferred to the internal gears. The power is sequentially transmitted to the gear 5, idle gear 6, fixed gear 4, and shaft 3, so that the inertial member 2 is rotated. In this embodiment, the number of teeth n of the internal gear 5 is 60, and the fixed gear 4 is
The number of teeth ")2 is 12.
かかる構成としであるので、感光体ドラム１が駆動され
ると、その回転力が内歯ギヤ５から順次各アイドルギヤ
６、固定ギヤ４、慣性部材２の軸３へと伝わるため、・
慣性部材２は高速で回転させられることになり、更に慣
性部材２に大きな慣性エネルギーをもたせられることに
なる。したがって、感光体ドラム１に、たとえば、外部
負荷や駆動負荷等が掛かつて駆動速度が変化させられる
ような状態になったとしても、慣性部材２のもつ大きな
慣性エネルギーにより、上記速度変化が非常に小さなも
のとされるため、感光体ドラム１は安定した状態で駆動
させられることになる。With this configuration, when the photoreceptor drum 1 is driven, its rotational force is sequentially transmitted from the internal gear 5 to each idle gear 6, fixed gear 4, and shaft 3 of the inertial member 2.
The inertial member 2 will be rotated at high speed, and the inertial member 2 will also be given a large amount of inertial energy. Therefore, even if the photosensitive drum 1 is subjected to an external load, a driving load, etc. and the driving speed is changed, the large inertial energy of the inertial member 2 causes the speed change to be extremely Since it is small, the photosensitive drum 1 is driven in a stable state.
上記にあいτ、感光体ドラム１と慣性部材２の回転速度
は、内歯ギヤ５と固定ギヤ４の歯数比によって決まる。In the above situation, the rotational speeds of the photosensitive drum 1 and the inertial member 2 are determined by the ratio of the number of teeth between the internal gear 5 and the fixed gear 4.
ここで、内歯ギヤ５と固定ギヤ４の回転速度をそれぞれ
Ｗｌ、Ｗ２ とすると、歯数ｎＩ 、ｎ２ どの関係
は、Ｗ、 ：Ｗ２ ＝ｎ２ 二 ｎ。Here, if the rotational speeds of the internal gear 5 and the fixed gear 4 are Wl and W2, respectively, then the number of teeth nI and n2 is related to W, :W2 = n2 2 n.
となる。又、”慣性部材２の回転モーメン１〜を１２と
すると、慣性エネルギーは、
値の２乗に比例した慣性エネルギーが得られることがわ
かる。したがって、本実施例では、この値を大きくとる
ために、ｎ、＝６０、ｎ２＝１２としである。becomes. Also, if the rotational moment of the inertial member 2 is 12, it can be seen that the inertial energy is proportional to the square of the value. Therefore, in this example, in order to increase this value, , n,=60, and n2=12.
このように、本発明では、従来における閂性モーメント
Ｉを大きくする代りに、慣性部材２の回転速度を大きく
し、しかも感光体ドラム１に必然的に形成される内部ス
ペースに上記慣性部材２を収納させることにより、小型
、軽量の装置へ採用することができるようになる。As described above, in the present invention, instead of increasing the bolting moment I in the conventional method, the rotational speed of the inertial member 2 is increased, and the inertial member 2 is provided in the internal space inevitably formed in the photoreceptor drum 1. By storing it, it becomes possible to employ it in a small and lightweight device.
なお、上記実施例では、感光体ドラム１の駆動により、
内歯ギヤ５側から固定ギヤ４側へ動力を伝達して慣性部
材２を回転させるようにしたが、アイドルギヤ６の軸７
に駆動装置を連結して、アイドルギヤ６の駆動により感
光体ドラム１と慣性部材２を回転させるようにしてもよ
いこと、各ギヤをはすばギヤにして動力伝達を更に滑ら
かに行わせるようにしてもよいこと、誘電体ベルトの駆
動ローラ部等に応用することは任意であること、その他
本発明の要旨を逸脱しない範囲内で種々変更を加え得る
ことは勿論である。In the above embodiment, by driving the photoreceptor drum 1,
Although power is transmitted from the internal gear 5 side to the fixed gear 4 side to rotate the inertial member 2, the shaft 7 of the idle gear 6
It is also possible to connect a drive device to the idle gear 6 to rotate the photosensitive drum 1 and the inertial member 2 by driving the idle gear 6, and to make each gear a helical gear for smoother power transmission. Of course, it is possible to apply the present invention to the drive roller portion of the dielectric belt, etc., and to make various other changes without departing from the gist of the present invention.
［効 果］
以上述べた如く、本発明の感光体駆動安定化装置によれ
ば、感光体の内部に、該感光体の運動エネルギーより大
きい運動エネルギーが得られるようにした慣性部材を配
置したので、従来の如く、感光体の外部に必要であった
フライホイールの設置スペースを不要にできて、小型、
軽量の装置への採用が実現でき、しかも慣性部材の大き
な運動エネルギーにより、感光体の駆動を安定化させる
ことができる、等の優れた効果を発揮する。[Effects] As described above, according to the photoreceptor drive stabilization device of the present invention, an inertial member that can obtain kinetic energy larger than the kinetic energy of the photoreceptor is arranged inside the photoreceptor. , the installation space for the flywheel, which was required outside the photoreceptor as in the past, can be eliminated, making it compact and
It can be used in lightweight devices, and the large kinetic energy of the inertial member provides excellent effects such as stabilizing the drive of the photoreceptor.
第１図は本発明の感光体駆動安定化装置の一実施例を示
す切断平面図、第２図は第１図の■−■矢視図である。
１・・・感光体ドラム、２・・・慣性部材、３・・・軸
、４・・・固定ギヤ、５・・・内歯ギヤ、６・・・アイ
ドルギヤ。FIG. 1 is a cutaway plan view showing an embodiment of the photoreceptor drive stabilizing device of the present invention, and FIG. 2 is a view taken along the line 1--2 in FIG. DESCRIPTION OF SYMBOLS 1... Photosensitive drum, 2... Inertial member, 3... Shaft, 4... Fixed gear, 5... Internal gear, 6... Idle gear.
Claims (1)
性部材間に駆動力が伝達されるようにし、且つ上記慣性
部材が上記感光体より大きな運動エネルギーが得られる
ような動力伝達系としてなることを特徴とする感光体駆
動安定化装置。(1) Disposing an inertial member inside the photoreceptor so that driving force is transmitted between the photoreceptor and the inertial member, and power transmission such that the inertial member can obtain greater kinetic energy than the photoreceptor. A photoreceptor drive stabilizing device characterized in that it functions as a system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63112238A JPH01282567A (en) | 1988-05-09 | 1988-05-09 | Device for driving and stabilizing photosensitive body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63112238A JPH01282567A (en) | 1988-05-09 | 1988-05-09 | Device for driving and stabilizing photosensitive body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01282567A true JPH01282567A (en) | 1989-11-14 |
Family
ID=14581701
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63112238A Pending JPH01282567A (en) | 1988-05-09 | 1988-05-09 | Device for driving and stabilizing photosensitive body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01282567A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5357231A (en) * | 1992-09-11 | 1994-10-18 | Konica Corporation | Photoreceptor for a copier having suppressed fluctuation component |
| US5430526A (en) * | 1991-07-31 | 1995-07-04 | Canon Kabushiki Kaisha | Image forming apparatus having weighting material in image bearing member and process cartridge usable with same |
| US5528348A (en) * | 1992-09-11 | 1996-06-18 | Konica Corporation | Damping device for rotating members |
| US5708933A (en) * | 1995-10-20 | 1998-01-13 | Fuji Xerox Co., Ltd. | Drive apparatus for image carrier of image forming apparatus and image forming apparatus |
| US6075955A (en) * | 1998-01-23 | 2000-06-13 | Mitsubishi Chemical America, Inc. | Noise reducing device for photosensitive drum of an image forming apparatus |
| JP2008268373A (en) * | 2007-04-17 | 2008-11-06 | Ricoh Co Ltd | Drive device or image forming apparatus |
| JP2010055055A (en) * | 2008-07-29 | 2010-03-11 | Ricoh Co Ltd | Drive device and image forming apparatus |
| JP2011043224A (en) * | 2009-08-24 | 2011-03-03 | Ricoh Co Ltd | Rotation transmission device and image forming apparatus having the same |
| JP2011186167A (en) * | 2010-03-08 | 2011-09-22 | Ricoh Co Ltd | Rotating body driving device and image carrier driving device and image forming apparatus using the rotating body driving device |
-
1988
- 1988-05-09 JP JP63112238A patent/JPH01282567A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5430526A (en) * | 1991-07-31 | 1995-07-04 | Canon Kabushiki Kaisha | Image forming apparatus having weighting material in image bearing member and process cartridge usable with same |
| US5357231A (en) * | 1992-09-11 | 1994-10-18 | Konica Corporation | Photoreceptor for a copier having suppressed fluctuation component |
| US5528348A (en) * | 1992-09-11 | 1996-06-18 | Konica Corporation | Damping device for rotating members |
| US5708933A (en) * | 1995-10-20 | 1998-01-13 | Fuji Xerox Co., Ltd. | Drive apparatus for image carrier of image forming apparatus and image forming apparatus |
| US6075955A (en) * | 1998-01-23 | 2000-06-13 | Mitsubishi Chemical America, Inc. | Noise reducing device for photosensitive drum of an image forming apparatus |
| JP2008268373A (en) * | 2007-04-17 | 2008-11-06 | Ricoh Co Ltd | Drive device or image forming apparatus |
| US7751746B2 (en) | 2007-04-17 | 2010-07-06 | Ricoh Company, Limited | Device for driving rotary body with mechanism for dampening fluctuation in rotation velocity |
| JP2010055055A (en) * | 2008-07-29 | 2010-03-11 | Ricoh Co Ltd | Drive device and image forming apparatus |
| JP2011043224A (en) * | 2009-08-24 | 2011-03-03 | Ricoh Co Ltd | Rotation transmission device and image forming apparatus having the same |
| JP2011186167A (en) * | 2010-03-08 | 2011-09-22 | Ricoh Co Ltd | Rotating body driving device and image carrier driving device and image forming apparatus using the rotating body driving device |
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