JPH05180290A - Drum driving device - Google Patents
Drum driving deviceInfo
- Publication number
- JPH05180290A JPH05180290A JP4000859A JP85992A JPH05180290A JP H05180290 A JPH05180290 A JP H05180290A JP 4000859 A JP4000859 A JP 4000859A JP 85992 A JP85992 A JP 85992A JP H05180290 A JPH05180290 A JP H05180290A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- drum
- fixed
- roller
- carrier
- 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.)
- Granted
Links
Landscapes
- Electrophotography Configuration And Component (AREA)
- Friction Gearing (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複写機の画像出力装置
等に於いて使用されるドラムの駆動装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device for a drum used in an image output device of a copying machine.
【０００２】[0002]
【従来の技術】複写機の感光ドラムのような高い回転精
度を必要とするものの駆動方式は、従来、図２に示した
ように、ドラム１の回転軸２の両側を高い精度の軸受３
で支え、回転速度にむらの少ないモータ４と直結され、
高精度の回転非を有し回転方向の振動の少ない滑らかな
出力回転を行なう減速機５（例えば、遊星ローラ減速機
など）を、ドラム１の回転軸２にカプリング６で連結す
る方式が一般的である。2. Description of the Related Art Conventionally, as shown in FIG. 2, the drive system of a photosensitive drum of a copying machine which requires high rotational accuracy is, as shown in FIG.
Supported by and is directly connected to the motor 4, which has less uneven rotation speed,
In general, a reduction gear 5 (for example, a planetary roller reduction gear) that has a highly precise rotation and has a smooth output rotation with little vibration in the rotation direction is connected to a rotary shaft 2 of a drum 1 by a coupling 6. Is.
【０００３】[0003]
【発明が解決しようとする課題】前述の従来技術には次
のような問題点がある。 （１）電動機が感光ドラムの外側に直列に配列されるの
で軸方向の全長が長くなり、ひいては複写機の巾が大き
くなる。 （２）感光ドラムの回転軸と減速機の駆動軸は、カップ
リングを介して連結されるので、両軸の同軸度が悪くな
りドラムに振動や回転むらを生じやすい。The above-mentioned prior art has the following problems. (1) Since the electric motors are arranged in series on the outside of the photosensitive drum, the overall length in the axial direction becomes long, and the width of the copying machine becomes large. (2) Since the rotary shaft of the photosensitive drum and the drive shaft of the speed reducer are connected via a coupling, the coaxiality of both shafts is deteriorated, and vibration and uneven rotation of the drum are likely to occur.
【０００４】本発明は、軸方向寸法が短く、且つドラム
に振動や回転むらを発生しない、特に複写機の画像出力
装置に敵したドラム駆動装置を提供することを目的とす
るものである。SUMMARY OF THE INVENTION It is an object of the present invention to provide a drum driving device which has a short axial dimension and which does not cause vibration or uneven rotation of the drum, and which is particularly suitable for an image output device of a copying machine.
【０００５】[0005]
（１）ドラムの回転軸を両端を固定支持する１本の固定
軸としドラムを貫通して設ける。 （２）駆動モータと減速機を組合わせた構造とし、ドラ
ムの内側で前記固定軸に一体に固設する。駆動用のリー
ド線は固定軸に設けた細穴を通して配線する。(1) The rotating shaft of the drum is provided as one fixed shaft having both ends fixedly supported, and penetrates through the drum. (2) It has a structure in which a drive motor and a speed reducer are combined, and is integrally fixed to the fixed shaft inside the drum. The drive lead wire is wired through a small hole provided in the fixed shaft.
【０００６】（３）駆動モータはアウターロータ式と
し、アウターロータの中空回転軸はステータの横外側に
直列に設ける。 （４）減速機は１段又は複数段の摩擦伝動を用いた遊星
ローラ式減速機とする。(3) The drive motor is an outer rotor type, and the hollow rotary shaft of the outer rotor is provided in series on the lateral outer side of the stator. (4) The speed reducer is a planetary roller type speed reducer using one-stage or multiple-stage friction transmission.
【０００７】[0007]
（１）両端固定の一本軸であるから強度、剛性が高くな
り、またドラムの回転軸と固定軸の同軸度を容易に向上
することができるので、ドラムの回転における芯ぶれを
防ぎ回転精度を高くできる。 （２）駆動モータと減速機がコンパクトな構造となりド
ラムの内側に収めることができる。従って、ドラムの外
側に駆動モータ用及び減速機用の特別のスペースを必要
とせず軸方向の長さを最小にすることができる。給電用
のリード線の配線も簡潔である。(1) Since it is a single shaft fixed at both ends, strength and rigidity are increased, and the coaxiality between the rotating shaft of the drum and the fixed shaft can be easily improved, so that runout of the drum during rotation is prevented and rotational accuracy is improved. Can be raised. (2) The drive motor and speed reducer have a compact structure and can be housed inside the drum. Therefore, it is possible to minimize the axial length without requiring a special space for the drive motor and the reduction gear outside the drum. The wiring of the lead wire for power supply is also simple.
【０００８】（３）駆動モータ部で固定軸とステータの
間にローラ軸が挿入されないので固定軸の直径を大きく
することができ、従って剛性が大きくなり振動の危険が
なくなる。 （４）摩擦駆動であるため伝動が滑らかであり振動が生
じない。また、減速機の各ローラの直径と減速段数を選
択することにより幅広く必要な減速比を得ることができ
る。(3) Since the roller shaft is not inserted between the fixed shaft and the stator in the drive motor section, the diameter of the fixed shaft can be increased, so that the rigidity is increased and the risk of vibration is eliminated. (4) Since friction drive is used, transmission is smooth and vibration does not occur. Further, by selecting the diameter of each roller of the reduction gear and the number of reduction gears, a wide required reduction ratio can be obtained.
【０００９】[0009]
【実施例】本発明の実施例を図１について説明する。図
において、ドラムＡは、円筒体２１と該円筒体２１の両
端にテーパ面で着脱可能に同軸配置で固定した端板２
２，２３とより成り、端板２２の軸部２２ａと端板２３
の軸部２３ａで軸受を介して、固定軸２７に回転自在に
支えられている。円筒体２１と端板２２及び端板２３を
テーパ面で固定する押圧力は、圧縮ばね２４とナット２
５と止めリング２６によって与えられる。固定軸２７
は、両端２７ａと２７ｂで図示していない装置本体に固
定支持され、一方に圧縮ばね締め付け用のおねじを、他
方には配線用の細穴２７ｃと止めリング取付溝を備えて
いる。ハウジングＢは、円筒胴２８と、これに直列につ
ながる円筒胴２９と、前記円筒胴２８の一端に着脱可能
に固定した端板３０とより成り、ハウジングＢの一端は
端板３０で前記固定軸２７に止めねじで固定され、他端
は前記円筒胴２９の一端で、軸受を介して前記端板２３
の軸部に支承されている。EXAMPLE An example of the present invention will be described with reference to FIG. In the figure, a drum A includes a cylindrical body 21 and end plates 2 detachably fixed to both ends of the cylindrical body 21 by taper surfaces in a coaxial arrangement.
2, 23, and the shaft portion 22a of the end plate 22 and the end plate 23
The shaft portion 23a is rotatably supported by the fixed shaft 27 via a bearing. The pressing force for fixing the cylindrical body 21, the end plate 22 and the end plate 23 by the tapered surface is the compression spring 24 and the nut 2.
5 and stop ring 26. Fixed shaft 27
Is fixedly supported by a device body (not shown) at both ends 27a and 27b, and is provided with a male screw for tightening a compression spring on one side and a fine hole 27c for wiring and a retaining ring mounting groove on the other side. The housing B includes a cylindrical body 28, a cylindrical body 29 connected in series to the cylindrical body 28, and an end plate 30 detachably fixed to one end of the cylindrical body 28. One end of the housing B is the end plate 30 and the fixed shaft. 27 is fixed to the end plate 23 via a bearing, and the other end is one end of the cylindrical body 29.
It is supported on the shaft of.
【００１０】駆動モータＣは、前記ハウジングＢの内側
に収められ、ステータ３１は前記端板３０の軸部に固定
され、アウタロータ３２は、円筒胴２８のフランジ部２
８ａに軸受を介して回転自在に支承された円筒軸３３に
固定されている。該円筒軸３３は、減速機Ｄへの入力軸
となっていて、先端は太陽ローラ３８を形成している。
減速機Ｄは、前記円筒胴２９の内側で、前記駆動モータ
Ｃに隣接して設けられ、前記円筒胴２９の内周面に固定
した内ローラ３４と、キャリア３５に固定された遊星ピ
ン３６に軸受を介して回転自由に支承された複数個の遊
星ローラ３７と、太陽ローラ３８とより成る一段又は複
数段の摩擦伝動遊星ローラ式減速機とする。太陽ローラ
３８は、前記円筒軸３３又は前記キャリア３５と一体に
形成され、キャリア３５は、回転自在に前記固定軸２７
に支承される。The drive motor C is housed inside the housing B, the stator 31 is fixed to the shaft portion of the end plate 30, and the outer rotor 32 is the flange portion 2 of the cylindrical body 28.
It is fixed to a cylindrical shaft 33 rotatably supported by 8a via a bearing. The cylindrical shaft 33 serves as an input shaft to the speed reducer D, and a tip thereof forms a sun roller 38.
The speed reducer D is provided inside the cylindrical body 29 and adjacent to the drive motor C, and includes an inner roller 34 fixed to an inner peripheral surface of the cylindrical body 29 and a planet pin 36 fixed to a carrier 35. The friction transmission planetary roller speed reducer is composed of a plurality of planetary rollers 37 rotatably supported by bearings and a sun roller 38, and has one or more stages. The sun roller 38 is formed integrally with the cylindrical shaft 33 or the carrier 35, and the carrier 35 is rotatably attached to the fixed shaft 27.
Supported by.
【００１１】図１の実施例では、減速段数は２段で、内
ローラ３４は弾性リングを用いた例を示してある。最終
段の遊星ピン３６は出力ピンで、ドラムの端板２３に設
けた穴２３ｃに固定され、ドラムＡを駆動回転させる。
駆動モータＣへのリード線３９は、固定軸２７に設けた
細穴２７ｃを通して配線する。このような装置におい
て、リード線３９に通電すると、駆動モータＣのアウタ
ーロータ３２は、円筒軸３３、該円筒軸３３の先端の太
陽ローラ３８を回転させる。該太陽ローラ３８は、減速
機Ｄの入力軸となっているので、減速機で減速された最
終段の遊星ピン３６がドラムＡを駆動回転させる。減速
機Ｄの各ローラの直径及び減速段数を変えることによっ
て、幅広く減速比を選択することが出来る。In the embodiment shown in FIG. 1, the number of deceleration stages is two and the inner roller 34 is an elastic ring. The planet pin 36 at the final stage is an output pin and is fixed to a hole 23c provided in the end plate 23 of the drum to drive and rotate the drum A.
The lead wire 39 to the drive motor C is wired through a small hole 27c provided in the fixed shaft 27. In such a device, when the lead wire 39 is energized, the outer rotor 32 of the drive motor C rotates the cylindrical shaft 33 and the sun roller 38 at the tip of the cylindrical shaft 33. Since the sun roller 38 serves as the input shaft of the speed reducer D, the planet pin 36 at the final stage, which is decelerated by the speed reducer, drives and rotates the drum A. A wide reduction ratio can be selected by changing the diameter of each roller and the number of reduction stages of the reduction gear D.
【００１２】駆動モータＣのアウターロータの円筒軸３
３は、ステータ３１の下には入り込まないので、固定軸
２７の直径を大きくすることができる。The cylindrical shaft 3 of the outer rotor of the drive motor C
Since 3 does not enter below the stator 31, the diameter of the fixed shaft 27 can be increased.
【００１３】[0013]
【発明の効果】本発明によるドラム駆動装置は、両端を
固定した固定軸と、円筒体及び同円筒体の両端に取り付
けた２個の端板よりなり同２個の端板の軸部で回転自在
に前記固定軸で支承されているドラムと、前記ドラムの
内側で前記固定軸に固定したステータ及び同固定軸上で
回転する円筒軸を持つアウターロータよりなる駆動モー
タと、前記固定軸に固定支持された内ローラ及び同固定
軸上で回転し入力軸となる太陽ローラ及び之等の両ロー
ラに接して遊星回転する遊星ローラ及び同遊星ローラを
回転可能に支持して出力軸となるキャリアよりなる遊星
ローラ式減速機とを具え、前記アウターロータの円筒軸
を前記遊星ローラ式減速機の初段入力軸である太陽ロー
ラに、また最終段出力軸であるキャリアを前記ドラムの
端板に、それぞれ直結したことにより、次の効果を有す
る。The drum driving device according to the present invention is composed of a fixed shaft having both ends fixed, and a cylindrical body and two end plates attached to both ends of the cylindrical body, and is rotated by a shaft portion of the two end plates. A drum that is freely supported by the fixed shaft, a drive motor that includes an outer rotor having a stator fixed to the fixed shaft inside the drum and a cylindrical shaft that rotates on the fixed shaft, and fixed to the fixed shaft From the supported inner roller and the planetary roller that rotates on the fixed shaft and comes into contact with both the sun roller and the other rollers that serve as the input shaft, and the planetary roller that rotatably supports the planetary roller and serves as the output shaft. A planetary roller type speed reducer, wherein the cylindrical shaft of the outer rotor is the first stage input shaft of the planetary roller speed reducer, the sun roller, and the final stage output shaft of the carrier is the end plate of the drum. By the sintering, it has the following advantages.
【００１４】（１）駆動モータと減速機を共にドラムの
中に配置したので、ドラム駆動装置の軸方向長さを最小
にし、従ってこのドラムを用いる装置を小型にすること
ができる。 （２）ドラムの回転軸として両端固定の一本軸を用いる
ので、強度、剛性が高くなり、また駆動モータ及び減速
機も同軸に配置しカプリング等を用いないので、各軸の
同軸度の精度が向上し、ドラムに振動や回転むらが生じ
ない。(1) Since the drive motor and the speed reducer are both arranged in the drum, the axial length of the drum drive device can be minimized, and the device using this drum can be made compact. (2) Since the single shaft fixed at both ends is used as the rotary shaft of the drum, the strength and rigidity are increased, and since the drive motor and the speed reducer are coaxially arranged and no coupling is used, the accuracy of the coaxiality of each shaft is high. And the drum does not vibrate or rotate unevenly.
【００１５】（３）減速機は、入力側ローラを駆動モー
タ軸に、減速出力側ローラをドラムに直結した遊星ロー
ラ式減速機を用いるので、動力伝達が滑らかに行われ、
振動のない回転精度の高いドラム駆動装置が得られる。 （４）アウターロータの円筒回転軸をステータの横外側
に配置し、ステータと固定軸の間に挿入しないので、固
定軸の直径を大きく選び剛性を上げて振動発生の危険を
防止できる。(3) Since the speed reducer uses a planetary roller type speed reducer in which the input side roller is directly connected to the drive motor shaft and the speed reduction output side roller is directly connected to the drum, smooth power transmission is achieved.
It is possible to obtain a drum driving device having high rotation accuracy without vibration. (4) Since the cylindrical rotary shaft of the outer rotor is arranged laterally outside the stator and is not inserted between the stator and the fixed shaft, the diameter of the fixed shaft can be selected to be large and the rigidity can be increased to prevent the risk of vibration generation.
【００１６】（５）駆動モータのステータは固定軸に取
り付けてあるので、駆動制御に必要な電気配線は固定軸
にあけた細穴を通して簡潔に行うことができる。(5) Since the stator of the drive motor is attached to the fixed shaft, the electric wiring required for drive control can be simply performed through the fine holes formed in the fixed shaft.
【図１】本発明の実施例の固定軸に沿った断面図であ
る。FIG. 1 is a sectional view taken along a fixed axis of an embodiment of the present invention.
【図２】従来装置の側面図である。FIG. 2 is a side view of a conventional device.
Ａ ドラム Ｂ ハウジング Ｃ 駆動モータ Ｄ 遊星ローラ式減速機 ２１ 円筒体 ２２ 端板 ２３ 端板 ２７ 固定軸 ３１ ステータ ３２ アウターロータ ３３ 円筒軸 ３４ 内ローラ ３５ キャリア ３７ 遊星ローラ A Drum B Housing C Drive motor D Planetary roller reducer 21 Cylindrical body 22 End plate 23 End plate 27 Fixed shaft 31 Stator 32 Outer rotor 33 Cylindrical shaft 34 Inner roller 35 Carrier 37 Planetary roller
Claims (1)
円筒体の両端に取り付けた２個の端板よりなり同２個の
端板の軸部で回転自在に前記固定軸で支承されているド
ラムと、前記ドラムの内側で前記固定軸に固定したステ
ータ及び同固定軸上で回転する円筒軸を持つアウターロ
ータよりなる駆動モータと、前記固定軸に固定支持され
た内ローラ及び同固定軸上で回転し入力軸となる太陽ロ
ーラ及び之等の両ローラに接して遊星回転する遊星ロー
ラ及び同遊星ローラを回転可能に支持して出力軸となる
キャリアよりなる遊星ローラ式減速機とを具え、前記ア
ウターロータの円筒軸を前記遊星ローラ式減速機の初段
入力軸である太陽ローラに、また最終段出力軸であるキ
ャリアを前記ドラムの端板に、それぞれ直結してなるこ
とを特徴とするドラム駆動装置。1. A fixed shaft having both ends fixed, and a cylindrical body and two end plates attached to both ends of the cylindrical body. The shafts of the two end plates are rotatably supported by the fixed shaft. A drum, a drive motor composed of a stator fixed to the fixed shaft inside the drum and an outer rotor having a cylindrical shaft rotating on the fixed shaft, an inner roller fixedly supported by the fixed shaft and the fixed A planetary roller type speed reducer consisting of a planetary roller that rotates on the shaft and comes into contact with both the sun roller and the other rollers that are the input shaft and rotates as a planet, and a carrier that rotatably supports the planetary roller and that serves as the output shaft. A cylindrical shaft of the outer rotor is directly connected to a sun roller that is a first stage input shaft of the planetary roller reducer, and a carrier that is a final stage output shaft is directly connected to an end plate of the drum. Dora Drive device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4000859A JP3051541B2 (en) | 1992-01-07 | 1992-01-07 | Drum drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4000859A JP3051541B2 (en) | 1992-01-07 | 1992-01-07 | Drum drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05180290A true JPH05180290A (en) | 1993-07-20 |
| JP3051541B2 JP3051541B2 (en) | 2000-06-12 |
Family
ID=11485390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4000859A Expired - Fee Related JP3051541B2 (en) | 1992-01-07 | 1992-01-07 | Drum drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3051541B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6420807B1 (en) | 1999-03-10 | 2002-07-16 | Minolta Co., Ltd. | Rotator driving device, image forming apparatus using the rotator driving device, and method of driving rotator |
| 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 |
-
1992
- 1992-01-07 JP JP4000859A patent/JP3051541B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6420807B1 (en) | 1999-03-10 | 2002-07-16 | Minolta Co., Ltd. | Rotator driving device, image forming apparatus using the rotator driving device, and method of driving rotator |
| US6768235B2 (en) | 1999-03-10 | 2004-07-27 | Minolta Co., Ltd. | Rotator driving device, image forming apparatus using the rotator driving device, and method of driving rotator |
| US6975053B2 (en) | 1999-03-10 | 2005-12-13 | Minolta Co., Ltd. | Rotator driving device, image forming apparatus using the rotator driving device, and method of driving rotator |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3051541B2 (en) | 2000-06-12 |
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