JP3432075B2 - Image carrier support device - Google Patents

Image carrier support device

Info

Publication number
JP3432075B2
JP3432075B2 JP12773096A JP12773096A JP3432075B2 JP 3432075 B2 JP3432075 B2 JP 3432075B2 JP 12773096 A JP12773096 A JP 12773096A JP 12773096 A JP12773096 A JP 12773096A JP 3432075 B2 JP3432075 B2 JP 3432075B2
Authority
JP
Japan
Prior art keywords
knob
drive shaft
image carrier
image
photoconductor
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
Application number
JP12773096A
Other languages
Japanese (ja)
Other versions
JPH09292814A (en
Inventor
英明 菅田
俊哉 矢部井
英世 渡辺
俊男 島崎
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP12773096A priority Critical patent/JP3432075B2/en
Publication of JPH09292814A publication Critical patent/JPH09292814A/en
Application granted granted Critical
Publication of JP3432075B2 publication Critical patent/JP3432075B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Electrophotography Configuration And Component (AREA)
  • Discharging, Photosensitive Material Shape In Electrophotography (AREA)

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】この発明は、電子写真式複写
機、プリンタ、ファクシミリ等の画像形成装置に用いら
れる像担持体の支持構造の改良に関し、詳細には像担持
体の脱着時の操作性を高めた像担持体の支持装置に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a support structure for an image carrier used in an image forming apparatus such as an electrophotographic copying machine, a printer and a facsimile, and more specifically, operability when the image carrier is attached and detached. The present invention relates to a support device for an image carrier having improved height.

【0002】[0002]

【従来の技術】上記画像形成装置の画像形成部に於て
は、感光体としての像担持体を予め一様に帯電させた状
態で、この感光体表面に光の画像情報を照射して静電潜
像を形成し、この静電潜像にトナーを付着させることに
よって得たトナー像を転写紙上に転写、定着させること
により、画像形成を行っている。上記像担持体として
は、ドラム状感光体が多く用いられており、従来の感光
体ドラムの支持方法は、画像形成装置本体の側板(面
板)間において、感光体ドラムの中心孔にドラム駆動軸
を挿入してから、駆動軸端部を側板に設けた軸孔に挿通
支持し、軸孔から側板外部に突出した駆動軸端部に施さ
れたネジ部に抜け止め用の固定用ノブ(ナット)をねじ
込むことにより固定している。なお、固定用ノブは、通
常の駆動時には駆動軸及び感光体ドラムと一体回転す
る。しかし、上記のごとき従来の感光体支持構造におい
て、一つのモータからの駆動力をギヤを介して複数の感
光体に伝達するギヤダウン方式ではなく、各感光体の駆
動を個別に設けたモ−タを用いて行うダイレクトドライ
ブ方式を採用した場合には、駆動伝達系の負荷が軽過ぎ
るため、感光体を交換するために感光体固定用ノブを回
転させて駆動軸から外そうとすると駆動軸まで空転し、
固定用ノブを緩めたり又取付時の締め込みができないと
いう不具合が発生する。なお、この種の不具合は、ギヤ
ダウン方式であっても、感光体駆動軸の直前に設けたク
ラッチによって駆動力伝達をON/OFFするタイプに
あっては、同様に発生する。
2. Description of the Related Art In an image forming section of the above image forming apparatus, an image carrier, which is a photoconductor, is uniformly charged in advance, and the surface of the photoconductor is irradiated with light image information to be statically charged. An image is formed by forming an electrostatic latent image and transferring and fixing the toner image obtained by attaching toner to the electrostatic latent image on a transfer paper. A drum-shaped photoconductor is often used as the image carrier, and the conventional method for supporting the photoconductor drum is that the drum drive shaft is provided in the center hole of the photoconductor drum between the side plates (face plates) of the image forming apparatus body. After inserting the drive shaft, the drive shaft end is inserted and supported in the shaft hole provided in the side plate, and the screw provided on the drive shaft end protruding from the shaft hole to the outside of the side plate is attached to the threaded locking knob (nut). ) Is fixed by screwing. The fixing knob rotates integrally with the drive shaft and the photosensitive drum during normal driving. However, in the conventional photoconductor support structure as described above, a motor in which the drive of each photoconductor is individually provided is not a gear down system in which the driving force from one motor is transmitted to a plurality of photoconductors via gears. If you use the direct drive method, the load on the drive transmission system is too light, so if you rotate the photoconductor fixing knob to replace the photoconductor and try to remove it from the drive shaft, Idling,
There is a problem that the fixing knob cannot be loosened or tightened during installation. Even if the gear-down system is used, this kind of problem similarly occurs in the type in which the driving force transmission is turned on / off by the clutch provided immediately before the photoconductor drive shaft.

【0003】これを図5に基づいて更に詳述すると、感
光体ドラム1をモ−タ2の出力軸2aに直結して駆動す
る場合、モ−タ出力軸2aと感光体駆動軸3の端部とを
カップリング等の連結部材4にて連結し、駆動軸3に設
けられた感光体駆動伝達用フランジ5と感光体ドラム1
とを連結することで、感光体ドラムを駆動している。更
に、感光体ドラム1のスラスト方向の位置決め固定を行
うために加圧スプリング6と一体化したスプリングホル
ダ−7を駆動軸3に挿通し、且つ本体面板10に設けら
れた軸受部材11にて駆動軸端部を支持している。更
に、本体面板10を本体側板12に取り付けた後、固定
用のノブ13を駆動軸端部のネジ部に螺着して感光体ド
ラムを固定していた。しかし、上述の様にこの感光体駆
動部は、ギヤダウン方式でなくダイレクトドライブ方式
であるため、駆動力の伝達経路中にギヤがない分だけ回
転時の負荷が過小となり、感光体ドラムの着脱時に固定
用ノブを回しても感光体駆動軸と固定用ノブが連れ回り
してしまい、固定用ノブを固定、或は取り外すことが困
難になっていた。また、従来は、感光体ドラムの回転ム
ラや振動等によって発生するバンディング(ピッチム
ラ)を防止するため、画像形成装置本体の裏側におい
て、感光体駆動軸に慣性質量の大きな材質にて構成され
るフライホイ−ルを取り付けているが、装置本体裏側に
は電装部品も多く配置されているため、スペ−ス的制約
が大きくなり、十分な慣性質量を得ることができなかっ
た。また、十分な慣性質量を得るためにはその分装置を
大型化せざるを得なかった。
This will be described in more detail with reference to FIG. 5. When the photosensitive drum 1 is directly connected to the output shaft 2a of the motor 2 and driven, the ends of the motor output shaft 2a and the photosensitive member drive shaft 3 are connected. Are connected to each other by a connecting member 4 such as a coupling, and a photosensitive member drive transmission flange 5 provided on the drive shaft 3 and the photosensitive drum 1 are connected.
The photosensitive drum is driven by connecting and. Further, in order to position and fix the photosensitive drum 1 in the thrust direction, the spring holder 7 integrated with the pressure spring 6 is inserted into the drive shaft 3 and driven by the bearing member 11 provided on the body face plate 10. It supports the shaft end. Further, after the main body face plate 10 is attached to the main body side plate 12, the fixing knob 13 is screwed to the screw portion at the end of the drive shaft to fix the photosensitive drum. However, as described above, since this photoconductor drive unit is a direct drive system instead of a gear down system, the load at the time of rotation is too small due to the absence of gears in the transmission path of the driving force, and when the photoconductor drum is attached or detached. Even when the fixing knob is rotated, the photosensitive member drive shaft and the fixing knob are rotated together, making it difficult to fix or remove the fixing knob. Further, conventionally, in order to prevent banding (pitch unevenness) caused by uneven rotation and vibration of the photoconductor drum, a flywheel formed of a material having a large inertial mass on the photoconductor drive shaft on the back side of the image forming apparatus main body. -However, since many electric components are arranged on the back side of the main body of the apparatus, the space limitation becomes large and a sufficient inertial mass cannot be obtained. Further, in order to obtain a sufficient inertial mass, the device had to be increased in size accordingly.

【0004】[0004]

【発明が解決しようとする課題】本発明は上記に鑑みて
なされたものであり、感光体ドラムの駆動軸を装置本体
の側板等に軸支するとともに、該駆動軸の脱落を防止す
る為の固定用ノブを該駆動軸端部に螺着するようにした
感光体の支持構造に於て、感光体ドラムを脱着する為に
固定用ノブを回転させて駆動軸端部から脱着する際に、
感光体ドラム側の負荷が軽過ぎるために感光体駆動軸が
固定用ノブに連れ回りして、着脱作業が困難化するとい
う欠点を解決することを目的としている。また、画像形
成装置本体の裏側に大型のフライホイールを配置するこ
とによる装置の大型化等を招くことなく、十分な慣性質
量を確保することを目的としている。
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is for supporting a drive shaft of a photosensitive drum on a side plate or the like of an apparatus main body and for preventing the drive shaft from falling off. In the support structure of the photoconductor in which the fixing knob is screwed to the end of the drive shaft, when the fixing knob is rotated and detached from the end of the drive shaft to detach the photoconductor drum,
An object of the present invention is to solve the problem that the photosensitive member drive shaft is rotated along with the fixing knob because the load on the photosensitive drum side is too light, which makes the attachment / detachment work difficult. Further, another object is to secure a sufficient inertial mass without causing an increase in size of the apparatus due to disposing a large flywheel on the back side of the main body of the image forming apparatus.

【0005】[0005]

【課題を解決するための手段】以上のように、請求項1
の発明は、画像形成装置の画像形成部を構成する像担持
体を回転自在且つ着脱自在に支持する支持装置であっ
て、像担持体と一体の駆動軸を装置本体の面板によって
回転自在に軸支した状態で該駆動軸端部の雄螺子部に固
定用ノブを螺着することにより、像担持体及び駆動軸の
脱落を防止したものにおいて、上記固定用ノブと像担持
体との間に位置する駆動軸上に、該駆動軸と回転方向に
一体化された空転防止ノブを配置するとともに、上記空
転防止ノブと、上記固定用ノブとが一体になっており、
且つ各ノブが互いに相対回転可能であり、固定用ノブを
駆動軸端部から着脱する作業性を向上したことを特徴と
する。請求項2の発明は、上記空転防止ノブを、慣性力
が比較的大きい材質で、大径に構成したことを特徴とす
る。請求項3の発明は、上記空転防止ノブに対して、別
体の慣性材料を着脱自在に構成したことを特徴とする。
[Means for Solving the Problems] As described above, claim 1
The invention of Claim 1 is a supporting device for rotatably and detachably supporting an image carrier constituting an image forming portion of an image forming apparatus, wherein a drive shaft integral with the image carrier is rotatably supported by a face plate of the main body of the device. By fixing a fixing knob to a male screw portion at the end of the drive shaft in a supported state, the image carrier and the drive shaft are prevented from falling off, and between the fixing knob and the image carrier. On the drive shaft located, a slip prevention knob integrated with the drive shaft in the rotation direction is arranged, and the slip prevention knob and the fixing knob are integrated,
Moreover, the respective knobs are rotatable relative to each other, and the workability of attaching and detaching the fixing knob from the end of the drive shaft is improved. The invention of claim 2 is characterized in that the idling prevention knob is made of a material having a relatively large inertial force and has a large diameter. The invention of claim 3 is characterized in that a separate inertial material is detachably attached to the idling prevention knob.

【0006】以下、本発明を図面に基づいて詳細に説明
する。図1(a) は参考例の支持装置の一例の要部断面
図、(b) は要部外観図、(c) は空転防止ノブの一例の斜
視図、(d) は他の参考例の空転防止ノブの構成説明図で
ある。なお、図1において図5と同一部分には同一符号
を付して説明する。(a) に示す様に感光体ドラム(像担
持体)1の駆動軸3の軸端部3aの雄螺子部には内周に
雌螺子部を有した固定用ノブ13が螺着一体化されてい
るが、この形態例では、固定用ノブ13と軸受11との
間の駆動軸外周に空転防止ノブ20を固定(回転方向に
固定)している。この空転防止ノブ20の孔20aは、
(b)(c)のように半月状(Dカット)に構成してもよい
し、(d)の様に突起20bを突設した形状であってもよ
い。(b) (c) の場合には、この孔20aを嵌合する軸端
部3a側の断面積も同様の半月状にする。また、孔20
aを(d) の様に構成した場合には、この突起20bを受
入れる為の溝3bを軸端部側に構成する。いずれにして
も、空転防止ノブ20が軸端部3aと回転方向に一体化
するように構成すれば良い。感光体ドラム1を装置本体
に組み付ける際には、図1(a) の様に空転防止ノブ20
を面板10から突出した軸端部3aに挿通して固定した
後で、固定用ノブ13を軸端部の雄螺子部に螺着する
が、この際、(b) の様に空転防止ノブを片手で保持しな
がら他方の手で固定用ノブを締め込むことにより、駆動
軸の連れ回りを防止しながら固定用ノブを確実且つ容易
に螺着することができる。図1(a) の様に組み付け状態
にある感光体ドラムを取り外す場合にも、図1(b) の様
に空転防止ノブ20を押えながら固定用ノブ13を螺着
解除方向に回転ささせることにより、駆動軸の連れ廻り
を防止しながら確実且つ容易に螺着を解除することがで
きる。
The present invention will be described below in detail with reference to the drawings. FIG. 1 (a) is a cross-sectional view of a main part of an example of a supporting device of the reference example , (b) is an external view of the main part, (c) is a perspective view of an example of a slip prevention knob, and (d) is another reference example . It is a structure explanatory view of an idling prevention knob. Note that, in FIG. 1, the same parts as those in FIG. As shown in (a), a fixing knob 13 having a female screw portion on the inner circumference is screwed and integrated with the male screw portion of the shaft end portion 3a of the drive shaft 3 of the photosensitive drum (image carrier) 1. However, in this embodiment, the idling prevention knob 20 is fixed (fixed in the rotation direction) to the outer circumference of the drive shaft between the fixing knob 13 and the bearing 11. The hole 20a of the idling prevention knob 20 is
It may have a half-moon shape (D cut) as shown in (b) and (c), or may have a shape in which the protrusion 20b is provided as shown in (d). In the cases of (b) and (c), the cross-sectional area on the side of the shaft end 3a into which the hole 20a is fitted is also the same half moon shape. Also, the hole 20
When a is constructed as shown in (d), a groove 3b for receiving the projection 20b is constructed on the shaft end side. In any case, the idling prevention knob 20 may be configured to be integrated with the shaft end portion 3a in the rotation direction. When assembling the photoconductor drum 1 into the main body of the apparatus, as shown in FIG.
After being fixed by inserting it through the shaft end 3a protruding from the face plate 10, the fixing knob 13 is screwed to the male screw part of the shaft end. At this time, the idling prevention knob as shown in (b) is used. By tightening the fixing knob with the other hand while holding it with one hand, it is possible to securely and easily screw the fixing knob while preventing the drive shaft from rotating together. Even when removing the photoconductor drum in the assembled state as shown in FIG. 1 (a), the fixing knob 13 should be rotated in the screwing release direction while pressing the idling prevention knob 20 as shown in FIG. 1 (b). Thus, the screwing can be reliably and easily released while preventing the drive shaft from rotating around.

【0007】次に、上記固定用ノブ13と空転防止ノブ
20とが分割していると、感光体ドラムの交換時に感光
体脱着作業の操作性が低下(手順の増加)したり、いず
れかの部品の紛失も発生しやすい。そこで、図2(a) 及
び(b) に示す本発明形態例(請求項に対応)では、
このような不具合の解決を図っている。即ち、この形態
例では、空転防止ノブ20の外側端面に同心円状の筒状
突起25を設けると共に、この筒状突起25とノブ本体
との間に溝部26を設ける。更に、固定用ノブ13側に
は、この溝部26に対し弾性的に係着可能な爪部27を
複数本突設する。爪部27の先端にはフック28が形成
されており、図2(b) の状態にある固定用ノブ13をそ
のまま軸方向に移動させて空転防止ノブ20に押圧する
と、フック28が筒状突起25の端部を外径方向に弾性
変形しながら乗り越え、最後にフック28が溝部26に
嵌着(係着)し、抜落ちしなくなる。このため、両ノブ
13、20は、互いに抜落ち不能でありながら、互いに
相対回転可能となっている。またこの一体構成の場合に
は空転防止ノブと固定用ノブが前後逆になっていてもよ
い。この形態例の空転防止ノブを用いた固定用ノブの着
脱操作は、図1(b) と同様に空転防止ノブを片手で押え
ながら、固定用ノブを回転させればよい。
Next, when the fixing knob 13 and the idling prevention knob 20 are divided, the operability of the photoconductor attachment / detachment work is reduced (the number of procedures is increased) when the photoconductor drum is replaced, or either Parts are easily lost. Accordingly, in the embodiment of the present invention shown in FIG. 2 (a) and (b) (corresponding to claim 1),
We are trying to solve such problems. That is, in this embodiment, a concentric cylindrical projection 25 is provided on the outer end surface of the idling prevention knob 20, and a groove portion 26 is provided between the cylindrical projection 25 and the knob body. Further, on the fixing knob 13 side, a plurality of claw portions 27 that can be elastically engaged with the groove portion 26 are provided in a protruding manner. A hook 28 is formed at the tip of the claw portion 27. When the fixing knob 13 in the state of FIG. 2 (b) is axially moved as it is and pressed against the idling prevention knob 20, the hook 28 has a cylindrical projection. The end of 25 is overcome while elastically deforming in the outer diameter direction, and finally the hook 28 is fitted (engaged) in the groove 26 and does not fall off. Therefore, the knobs 13 and 20 are rotatable with respect to each other, although they cannot be pulled out from each other. Further, in the case of this integral structure, the idling prevention knob and the fixing knob may be turned upside down. The attachment / detachment operation of the fixing knob using the idling prevention knob of this embodiment may be performed by rotating the fixing knob while pressing the idling prevention knob with one hand as in FIG. 1 (b).

【0008】請求項に対応する形態例を図3(a) (b)
に示す。図3の形態例では、空転防止ノブ20の形状
(外径寸法)を大きくし、且つ慣性力の比較的大きな材
質にて構成する。外径寸法を大きくした分だけ、空転防
止ノブ20の外径が持ちづらくなってしまうため、図の
ように中心部と外周縁との間の適所に小径円盤状に突出
するツマミ部を一体的に設ける。従って、固定用ノブの
着脱操作時にはこのツマミ部を片手で保持しながら、固
定用ノブを回転させることにより、駆動軸3を連れ回り
させずに固定用ノブの着脱が可能になる。また、空転防
止ノブ20は、外径寸法が大きな円盤状であり、且つ慣
性力の大きな材質から構成されているので、この空転防
止ノブ20が大型のフライホイールとして機能し、感光
体ドラムの回転ムラや振動等によって発生するバンディ
ング(ピッチムラ)を防止することができる。この際、
装置本体の裏側の狭いスペースにフライホイールを付加
する等の必要がなくなる為、装置本体の大型化等を招く
ことなく、十分な慣性質量を確保することができる。即
ち、感光体の前側の軸端部の僅かのスペース内に十分な
慣性質量を有するフライホイールとして機能する空転防
止ノブを配置することができるので、このような効果を
得ることができる。なお、この形態例は、図1の参考例
の様に両ノブを別体構造とした場合にも、図2の様に両
ノブを一体化した場合にも夫々適用可能である。
A mode example corresponding to claim 2 is shown in FIGS.
Shown in. In the embodiment shown in FIG. 3, the idling prevention knob 20 has a large shape (outer diameter) and is made of a material having a relatively large inertial force. Since the outer diameter of the idling prevention knob 20 becomes difficult to hold due to the increase in the outer diameter dimension, a knob portion protruding like a small-diameter disc is integrally formed at a proper position between the central portion and the outer peripheral edge as shown in the figure. To be installed. Therefore, when the fixing knob is attached / detached, the fixing knob can be attached / detached without rotating the drive shaft 3 by rotating the fixing knob while holding the knob portion with one hand. Further, since the idling prevention knob 20 has a disk shape with a large outer diameter and is made of a material having a large inertial force, the idling prevention knob 20 functions as a large flywheel to rotate the photosensitive drum. Banding (pitch unevenness) caused by unevenness or vibration can be prevented. On this occasion,
Since it is not necessary to add a flywheel to a narrow space on the back side of the device body, it is possible to secure a sufficient inertial mass without causing an increase in the size of the device body. That is, since the idling prevention knob functioning as a flywheel having a sufficient inertial mass can be arranged in a small space at the front shaft end portion of the photoconductor, such an effect can be obtained. It should be noted that this example of the embodiment can be applied to both the case where both knobs have a separate structure as in the reference example of FIG. 1 and the case where both knobs are integrated as shown in FIG. .

【0009】次に、図4は請求項に対応する本発明の
形態例の要部断面図であり、この形態例は、空転防止ノ
ブのツマミ部の操作性を損なわない位置に慣性部材31
を脱着可能に取付けた点が特徴的である。慣性部材31
の取付位置は、例えば空転防止ノブ20の外周縁部等と
し、空転防止ノブに設けた嵌合部32に嵌合したり、或
は、空転防止ノブに設けた図示しない位置決めピン等に
て位置決めした後で、締結部材(ネジ等)33にて取り
付ける。この脱着可能な慣性部材を数枚に分割し、取付
け枚数を調整しながら追加できるようにしてもよい。こ
のように構成することにより、バンディングの程度に応
じて、得ようとする慣性を微調整することが可能とな
る。この形態例のその他の効果は、図3の形態例の効果
と同様である。なお、この形態例は、図1の参考例の様
に両ノブを別体構造とした場合にも、図2の様に両ノブ
を一体化した場合にも夫々適用可能である。なお、上記
形態例では、主としてドラム状の感光体の軸の取付け構
造について説明したが本発明は回転する部品の軸の取付
け構造一般に適用可能である。
Next, FIG. 4 is a sectional view of an essential part of an embodiment of the present invention corresponding to claim 3. In this embodiment, the inertia member 31 is located at a position where the operability of the knob portion of the idling prevention knob is not impaired.
It is characterized in that it was detachably attached. Inertia member 31
The mounting position is, for example, the outer peripheral edge portion of the idling prevention knob 20 and is fitted to the fitting portion 32 provided on the idling prevention knob, or is positioned by a not shown positioning pin or the like provided on the idling prevention knob. After that, it is attached with a fastening member (screw or the like) 33. This detachable inertia member may be divided into several pieces so that they can be added while adjusting the number of attachments. With this configuration, it is possible to finely adjust the inertia to be obtained according to the degree of banding. Other effects of this form example are similar to the effects of the form example of FIG. It should be noted that this embodiment can be applied to the case where both knobs have a separate structure as in the reference example of FIG. 1 and the case where both knobs are integrated as shown in FIG. In the embodiment described above, the mounting structure of the shaft of the drum-shaped photosensitive member has been mainly described, but the present invention is generally applicable to the mounting structure of the shaft of the rotating component.

【0010】以上のように請求項1の発明によれば、感
光体ドラム等の回転体を装置本体の側板等から外して交
換/固定する際に、感光体駆動軸の空転を防止するため
の空転防止ノブを設けたため、固定用ノブを用いた感光
体脱着の操作が簡単になった。さらに、空転防止ノブと
固定用ノブを一体化したため、図1等に示した分割タイ
プと違い、感光体脱着時に片方の部品を紛失する恐れが
無くなった。しかも、操作性の良さに変わりはない。請
求項によれば、空転防止ノブを兼ねるフライホイール
を用いることにより、装置本体裏側にバンディング防止
用のフライルホイ−ルを取り付けるスペ−スが無い場合
に、フライホイールを装置本体前側に取り付けることが
可能となった。請求項によれば、バンディングの状態
に応じて慣性質量を増加させる必要がある場合に、本体
裏側のスペ−スだけでなく前側も有効に利用でき装置の
大型化が避けられる。
As described above, according to the first aspect of the present invention, when the rotating body such as the photosensitive drum is removed from the side plate of the apparatus main body and replaced / fixed, the idling of the photosensitive member drive shaft is prevented. Since the idling prevention knob is provided, the operation of attaching and detaching the photoconductor using the fixing knob becomes easy. Furthermore , since the idling prevention knob and the fixing knob are integrated, unlike the split type shown in FIG. 1 and the like, there is no risk of losing one of the parts when the photoreceptor is attached or detached. Moreover, the operability is the same. According to the second aspect , by using the flywheel that also functions as the idling prevention knob, the flywheel can be attached to the front side of the apparatus body when there is no space for attaching the flywheel for banding prevention on the back side of the apparatus body. It has become possible. According to the third aspect , when it is necessary to increase the inertial mass according to the state of banding, not only the space on the back side of the main body but also the front side can be effectively used, and the enlargement of the device can be avoided.

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

【図1】(a) は参考例の支持装置の一例の要部断面図、
(b) は要部外観図、(c) は空転防止ノブの一例の斜視
図、(d) は他の参考例の空転防止ノブの構成説明図。
FIG. 1A is a cross-sectional view of a main part of an example of a supporting device according to a reference example .
(b) is an external view of a main part, (c) is a perspective view of an example of a slip prevention knob, and (d) is a configuration explanatory view of a slip prevention knob of another reference example .

【図2】本発明形態例の要部断面図、及び要部分解斜
視図。
FIG. 2 is a cross-sectional view of a main part of an embodiment of the present invention and an exploded perspective view of the main part.

【図3】本発明の他の形態例の要部断面図、及び要部斜
視図。
FIG. 3 is a cross-sectional view of a main part and a perspective view of the main part according to another embodiment of the present invention.

【図4】本発明の他の形態例の要部断面図。FIG. 4 is a sectional view of an essential part of another embodiment of the present invention.

【図5】従来の感光体支持装置の縦断面図。FIG. 5 is a vertical cross-sectional view of a conventional photoconductor supporting device.

【符号の説明】[Explanation of symbols]

1 感光体ドラム、2 モ−タ、2a 出力軸,3 感
光体駆動軸,3a 軸端部、3b 溝、4 連結部材,
5 感光体駆動伝達用フランジ,6 加圧スプリング,
7 スプリングホルダ−,10 本体面板,11 軸受
部材,12 本体側板,13 固定用ノブ、20 空転
防止ノブ、20a 孔、20b 突起、25 筒状突
起、26 溝部、27 爪部、28 フック、30 ツ
マミ部、31 慣性部材、
1 photoconductor drum, 2 motor, 2a output shaft, 3 photoconductor drive shaft, 3a shaft end, 3b groove, 4 connecting member,
5 photoconductor drive transmission flange, 6 pressure spring,
7 Spring Holder-, 10 Body Face Plate, 11 Bearing Member, 12 Body Side Plate, 13 Fixing Knob, 20 Idling Prevention Knob, 20a Hole, 20b Protrusion, 25 Cylindrical Protrusion, 26 Groove, 27 Claw, 28 Hook, 30 Knob Part, 31 inertia member,

───────────────────────────────────────────────────── フロントページの続き (72)発明者 島崎 俊男 東京都大田区中馬込一丁目3番6号 株 式会社 リコー内 (56)参考文献 特開 平6−314052(JP,A) 特開 平5−53382(JP,A) 特開 平2−35163(JP,A) 実開 昭59−161166(JP,U) 実開 平1−75274(JP,U) 実開 平2−7676(JP,U) 実開 昭60−49550(JP,U) (58)調査した分野(Int.Cl.7,DB名) G03G 21/00 350 G03G 21/16 G03G 15/00 550 F16D 1/06 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshio Shimazaki 1-3-6 Nakamagome, Ota-ku, Tokyo Within Ricoh Co., Ltd. (56) Reference JP-A-6-314052 (JP, A) JP-A 5-53382 (JP, A) JP-A-2-35163 (JP, A) Actually open 59-161166 (JP, U) Actually open 1-75274 (JP, U) Actually open 2-7676 (JP, U) Actual development Sho 60-49550 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) G03G 21/00 350 G03G 21/16 G03G 15/00 550 F16D 1/06

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 画像形成装置の画像形成部を構成する像
担持体を回転自在且つ着脱自在に支持する支持装置であ
って、像担持体と一体の駆動軸を装置本体の面板によっ
て回転自在に軸支した状態で該駆動軸端部の雄螺子部に
固定用ノブを螺着することにより、像担持体及び駆動軸
の脱落を防止したものにおいて、 上記固定用ノブと像担持体との間に位置する駆動軸上
に、該駆動軸と回転方向に一体化された空転防止ノブを
配置するとともに、上記空転防止ノブと、上記固定用ノ
ブとが一体になっており、且つ各ノブが互いに相対回転
可能であり、固定用ノブを駆動軸端部から着脱する作業
性を向上したことを特徴とする像担持体の支持装置。
1. A support device for rotatably and detachably supporting an image carrier constituting an image forming portion of an image forming apparatus, wherein a drive shaft integral with the image carrier is rotatable by a face plate of an apparatus main body. A fixing knob is screwed to the male screw portion at the end of the drive shaft in a state of being axially supported to prevent the image carrier and the drive shaft from falling off. On the drive shaft located at, the slip prevention knob integrated with the drive shaft in the rotation direction is arranged , and the slip prevention knob and the fixing knob are integrated, and each knob is mutually Ri rotatable relative der, supporting device of the image bearing member, characterized in that it has improved the workability for attaching and detaching the locking knob from the drive shaft end.
【請求項2】 上記空転防止ノブを、慣性力が比較的大
きい材質を用いて、大径に構成したことを特徴とする請
求項記載の像担持体の支持装置。
The method according to claim 2, wherein said idling prevention knob, using a relatively large material inertia, the support device of the image bearing member according to claim 1, characterized by being configured to have a larger diameter.
【請求項3】 上記空転防止ノブに対して、別体の慣性
材料を着脱自在に構成したことを特徴とする請求項1又
は2記載の像担持体の支持装置。
Relative wherein said idling prevention knob, also claim 1, characterized in that the detachably attached to the separate inertial material
Is an image carrier supporting device described in 2 .
JP12773096A 1996-04-24 1996-04-24 Image carrier support device Expired - Fee Related JP3432075B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12773096A JP3432075B2 (en) 1996-04-24 1996-04-24 Image carrier support device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12773096A JP3432075B2 (en) 1996-04-24 1996-04-24 Image carrier support device

Publications (2)

Publication Number Publication Date
JPH09292814A JPH09292814A (en) 1997-11-11
JP3432075B2 true JP3432075B2 (en) 2003-07-28

Family

ID=14967283

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12773096A Expired - Fee Related JP3432075B2 (en) 1996-04-24 1996-04-24 Image carrier support device

Country Status (1)

Country Link
JP (1) JP3432075B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100433422B1 (en) * 2002-07-19 2004-05-31 삼성전자주식회사 Roller spacing device

Also Published As

Publication number Publication date
JPH09292814A (en) 1997-11-11

Similar Documents

Publication Publication Date Title
US5210574A (en) Photosensitive drum body-mounting mechanism including a drive coupling member with a coupling protrusion adapted to bite into the inner surface of the mechanism's photosensitive drum
KR100355723B1 (en) Process cartridge, electrophotographic image forming apparatus, driving force transmission part and electrophotographic photosensitive drum
US6829455B2 (en) Driving force transmission mechanism, image forming apparatus equipped with such a mechanism, and process unit of such an apparatus
JP3179153B2 (en) Rotary developing device
JP3658369B2 (en) Image forming apparatus
JPH02304459A (en) Drum driving device for electrophotographic printer
JPH09177807A (en) Joint mechanism for two shafts
JP3432075B2 (en) Image carrier support device
US6131003A (en) Noise reducing device for photosensitive drum of an image forming apparatus
JP3263261B2 (en) Drive transmission device, method of assembling the same, and jig used in the method of assembling the same
JP2000214727A (en) Image forming device
JP2731406B2 (en) Image forming device
JP2006064793A (en) Image forming apparatus
JP3513303B2 (en) Rotating member, process cartridge, and image forming apparatus
JP3179443B2 (en) Toner cartridge
JP3368703B2 (en) Photoreceptor drum fixing structure
JP3512862B2 (en) Gearing
JP2908500B2 (en) Color developing device
JP3422543B2 (en) Electrophotographic photoreceptor drive
JP3394292B2 (en) Image forming device
JP3312820B2 (en) Image forming device
JPH07319329A (en) Drum assembly for image forming device
JP2001003923A (en) Driving connection device
KR20010035292A (en) Paper Pick up Spring Cluch for Office Automation Apparatus
JP3432074B2 (en) Photoconductor holding device

Legal Events

Date Code Title Description
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20030415

LAPS Cancellation because of no payment of annual fees