JP4515226B2 - Shaft coupling device, rotation transmission device, and image forming apparatus - Google Patents

Shaft coupling device, rotation transmission device, and image forming apparatus Download PDF

Info

Publication number
JP4515226B2
JP4515226B2 JP2004326906A JP2004326906A JP4515226B2 JP 4515226 B2 JP4515226 B2 JP 4515226B2 JP 2004326906 A JP2004326906 A JP 2004326906A JP 2004326906 A JP2004326906 A JP 2004326906A JP 4515226 B2 JP4515226 B2 JP 4515226B2
Authority
JP
Japan
Prior art keywords
shaft
grip
rotating body
rotation
coupling
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
JP2004326906A
Other languages
Japanese (ja)
Other versions
JP2006138356A (en
Inventor
薫 吉野
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 JP2004326906A priority Critical patent/JP4515226B2/en
Publication of JP2006138356A publication Critical patent/JP2006138356A/en
Application granted granted Critical
Publication of JP4515226B2 publication Critical patent/JP4515226B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

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

Description

この発明は、第１軸と第２軸とを結合する軸結合装置と、その軸結合装置を備えた回転伝達装置と、その回転伝達装置を備えた画像形成装置に関する。   The present invention relates to a shaft coupling device that couples a first shaft and a second shaft, a rotation transmission device including the shaft coupling device, and an image forming apparatus including the rotation transmission device.

例えば画像形成装置では、高画質の画像を得るためには画像を担持して回転する感光体（回転体）を高精度で回転させることが求められる。特に、感光体を複数並べて、その各感光体にそれぞれ異なる色の画像を形成して、その各色の画像を中間転写ベルトや直接転写紙に重ね合わせて順次転写することによってフルカラーの画像を得るタンデム型のフルカラープリンタや複写機では、色ずれ等が生じないようにするため、より高い精度が求められる。   For example, in an image forming apparatus, in order to obtain a high-quality image, it is required to rotate a photoconductor (rotating body) that carries and rotates an image with high accuracy. In particular, a tandem that obtains a full-color image by arranging a plurality of photoconductors, forming images of different colors on the photoconductors, and sequentially transferring the images of the respective colors on an intermediate transfer belt or direct transfer paper. In the type of full-color printer and copying machine, higher accuracy is required in order to prevent color misregistration and the like.

そのため、このようなタンデム型の画像形成装置では、高精度なモータを用いて回転体の回転精度の向上を図るようにしている。しかしながら、モータ自体がいくら高精度であっても、モータの回転軸と感光体を支持する軸との結合部に互いに軸芯のずれがあると、感光体に回転ムラが生じる。
したがって、この場合には感光体表面の副走査方向にバンディングと呼ばれる画像ムラや位置ずれが発生するため、画像品質が低下してしまうようになる。 Therefore, in such a tandem type image forming apparatus, a high-precision motor is used to improve the rotational accuracy of the rotating body. However, no matter how highly accurate the motor itself is, if there is a misalignment between the axes of the coupling portion between the rotation shaft of the motor and the shaft that supports the photoconductor, rotation unevenness occurs in the photoconductor.
Therefore, in this case, image unevenness or positional deviation called banding occurs in the sub-scanning direction on the surface of the photosensitive member, so that the image quality is deteriorated.

そこで、従来の感光体を支持する回転軸と、その回転軸を回転させるモータの軸とを結合する軸結合装置として、特許文献１に記載されているものがある。
その特許文献１に記載の軸結合装置は、感光体の回転軸にフランジを取り付けると共に、その回転軸に径方向にスプリングピンを突出状態に固定し、そのフランジの部分をモータの軸に取り付けられているドラムカップリング手段に嵌合させると共に、スプリングピンをドラムカップリング手段の切欠きに嵌合させ、モータに設けられている４箇所の取り付け孔にそれぞれビスを通して画像形成装置本体に固定することにより、モータを画像形成装置本体に固定している。 Therefore, as a shaft coupling device for coupling a conventional rotating shaft that supports a photosensitive member and a motor shaft that rotates the rotating shaft, there is one described in Patent Document 1.
In the shaft coupling device described in Patent Document 1, a flange is attached to the rotating shaft of the photosensitive member, and a spring pin is fixed to the rotating shaft in a protruding state in the radial direction, and the flange portion is attached to the shaft of the motor. In addition, the spring pin is fitted in the notch of the drum coupling means, and is fixed to the image forming apparatus main body through screws in four mounting holes provided in the motor. Thus, the motor is fixed to the image forming apparatus main body.

また、このようなカップリングなどの軸継手における回転軸の取り付け構造においても、軸芯のずれや空回りをなくす必要があるため、例えば特許文献２に記載されているように、円筒状のジョイント部材の両端開口から２本の軸（シャフト）を緊密に嵌入させ、それぞれ軸芯に直交し且つ互いに直交する方向に貫通する固定ネジを螺入して、ジョイント部材と２本の軸とを連結固定するようにしたものがあった。
特開２００２−３５７９８６号公報（第４頁、図７〜図９） 実開平６−０４３３５８号公報（請求項１、図１） Further, in the mounting structure of the rotary shaft in such a coupling such as a coupling, since it is necessary to eliminate the deviation of the shaft core and the idling, for example, as described in Patent Document 2, a cylindrical joint member The two shafts (shafts) are tightly fitted through the openings at both ends, and fixing screws that are perpendicular to the axis and perpendicular to each other are screwed into the joint member and the two shafts. There was something to do.
JP 2002-357986 A (page 4, FIGS. 7 to 9) Japanese Utility Model Publication No. 6-043358 (Claim 1, FIG. 1)

しかしながら、特許文献１に記載の軸結合装置は、感光体の回転軸に取り付けたスプリングピンがドラムカップリング手段の切欠きに嵌合することにより、互いの軸が結合されるものであって、感光体側の回転軸とモータの軸とが完全に一体化する結合ではない。そのため、必ずしも高い精度の軸結合とはいえず、結合する互いの軸芯にずれが生じる恐れがあった。   However, the shaft coupling device described in Patent Document 1 is a device in which the shafts are coupled by the spring pin attached to the rotating shaft of the photoreceptor being fitted into the notch of the drum coupling means. This is not a coupling in which the rotating shaft on the photoconductor side and the shaft of the motor are completely integrated. For this reason, the shaft coupling is not necessarily highly accurate, and there is a possibility that the shaft cores to be coupled are displaced.

また、特許文献２に記載されているようなジョイント部材と回転軸の固定構造では、円筒状のジョイント部材に両側から結合しようとする２本の回転軸を嵌入させて連結固定するので、その嵌め合いには必然的にわずかなガタが生じてしまう。そこに固定ネジを径方向に螺入して締めつけると、そのガタ分だけ軸芯がずれてしまうため、高い精度で軸芯を一致させて結合することが困難であった。   Moreover, in the fixing structure of a joint member and a rotating shaft as described in Patent Document 2, two rotating shafts that are to be coupled from both sides are inserted into a cylindrical joint member to be connected and fixed. There will inevitably be a slight backlash. If the fixing screw is screwed into the radial direction and tightened, the shaft core is displaced by the amount of play, and it is difficult to connect the shaft cores with high accuracy.

この発明は、上記の問題点に鑑みてなされたものであり、高精度で互いに軸芯がずれることなく、２本の軸を確実に連結できる軸結合装置を提供することを目的とする。さらに、モータの出力軸の回転を高精度で回転体の軸に伝え、軸芯のずれによる回転ムラを防止できる回転伝達装置を提供すること、および画像形成装置における画像形成に用いる回転体の回転ムラを防止し、高品質な画像を形成できるようにすることも目的とする。   The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a shaft coupling device that can reliably connect two shafts with high accuracy without causing misalignment of the shaft cores. Furthermore, the rotation of the output shaft of the motor is transmitted to the shaft of the rotating body with high accuracy, and a rotation transmitting device capable of preventing uneven rotation due to the misalignment of the axis is provided. Another object is to prevent unevenness and to form a high-quality image.

この発明による軸結合装置は第１軸と第２軸とを結合する軸結合装置であって、上記の目的を達成するため、上記第１軸と第２軸のいずれか一方の軸に、他方の軸をグリップするグリップ部を有するグリップ部材を設け、上記他方の軸に、該軸によって回転されることによって上記グリップ部を径方向に移動させて上記他方の軸を把持するグリップ力を上記グリップ部に作用させるグリップ力作用部材を設け、上記グリップ部の上記他方の軸をグリップする部分を周方向に複数に分割し、上記グリップ部材は、上記グリップ部と一体に上記一方の軸を挿入させる結合部を有し、その結合部とそこに挿入された上記一方の軸とを径方向に貫通するネジ部材で締結し、上記結合部は中心軸線に対して対称な形状に形成されている。 A shaft coupling device according to the present invention is a shaft coupling device that couples a first shaft and a second shaft, and in order to achieve the above object, the shaft is coupled to one of the first shaft and the second shaft. the gripping member is provided with a grip portion for gripping the shaft, on the other axis, the gripping grip for gripping the other axis by moving the grip portion in the radial direction by being rotated by the shaft A grip force acting member that acts on the grip portion is provided, a portion that grips the other shaft of the grip portion is divided into a plurality of portions in the circumferential direction, and the grip member is configured to insert the one shaft integrally with the grip portion. The coupling portion is fastened with a screw member that penetrates the coupling portion and the one shaft inserted therein in a radial direction, and the coupling portion is formed in a symmetrical shape with respect to the central axis .

さらに、上記グリップ部材は、上記グリップ部の根元部分と上記結合部との間に上記第１軸と第２軸の各先端部が相互に対向して挿入される軸芯確保部を有し、その軸芯確保部と上記結合部の内径が同じである。 Furthermore , the grip member has an axial center securing portion into which the tip portions of the first shaft and the second shaft are inserted to face each other between the base portion of the grip portion and the coupling portion, The inner diameters of the shaft securing portion and the coupling portion are the same .

また、この発明による回転伝達装置は、上記軸結合装置を用いた回転伝達装置であって、上記第１軸と第２軸の一方が回転体を支持する回転体支持軸であり、他方がその回転体支持軸を回転させるモータの出力軸であり、上記回転体支持軸には上記回転体に係合して上記回転体と一体に回転する回転体係合部材を一体的に設けると共に、上記回転体支持軸を回転可能に支持する軸受を設けたものである。   The rotation transmission device according to the present invention is a rotation transmission device using the shaft coupling device, wherein one of the first shaft and the second shaft is a rotation body support shaft that supports the rotation body, and the other is the rotation shaft. An output shaft of a motor that rotates the rotating body support shaft, and the rotating body support shaft is integrally provided with a rotating body engaging member that engages with the rotating body and rotates integrally with the rotating body; A bearing that rotatably supports the rotating body support shaft is provided.

そして、上記モータが減速機構を有さない直接駆動方式のモータであるとよい。
さらに、この発明による画像形成装置は、上記回転伝達装置を設けた画像形成装置であって、画像形成に用いる回転体とそれを駆動するモータとの間に上記回転伝達装置を設けたものである。
例えば、上記回転体がドラム状の感光体であり、カラー画像形成装置の場合には、その感光体が複数設けられている。
The motor may be a direct drive motor that does not have a speed reduction mechanism.
Furthermore, an image forming apparatus according to the present invention is an image forming apparatus provided with the above rotation transmission device, wherein the rotation transmission device is provided between a rotating body used for image formation and a motor for driving the same. .
For example, in the case of a color image forming apparatus, the rotating body is a drum-shaped photoreceptor, and a plurality of the photoreceptors are provided.

この発明による軸結合装置は、高精度で互いに軸芯がずれることなく、２本の軸を確実に連結できるようにすることができる。また、この発明による回転伝達装置は、モータの出力軸の回転を高精度で回転体の軸に伝え、軸芯のずれによる回転ムラを防止することができる。そして、この発明による画像形成装置は、画像形成に用いる感光体等の回転体の回転ムラを防止し、高品質な画像を形成することができる。   The shaft coupling device according to the present invention can reliably connect two shafts with high accuracy and without misalignment of the shaft cores. In addition, the rotation transmission device according to the present invention transmits the rotation of the output shaft of the motor to the shaft of the rotating body with high accuracy, and can prevent rotation unevenness due to the shift of the shaft core. The image forming apparatus according to the present invention can prevent rotation unevenness of a rotating body such as a photoconductor used for image formation, and can form a high-quality image.

以下、この発明を実施するための最良の形態を図面に基づいて説明する。
〔軸結合装置の実施例〕
図１はこの発明による軸結合装置の一実施例によって第１軸と第２軸とを結合した状態を示す断面図、図２は同じくその２つの軸を結合させた状態を示す斜視図、図３は同じくその２つの軸を結合させる前の状態を示す分解斜視図である。 The best mode for carrying out the present invention will be described below with reference to the drawings.
[Example of shaft coupling device]
FIG. 1 is a sectional view showing a state in which a first shaft and a second shaft are coupled according to an embodiment of the shaft coupling device according to the present invention, and FIG. 2 is a perspective view showing a state in which the two shafts are coupled together. 3 is an exploded perspective view showing a state before the two shafts are joined together.

この実施例の軸結合装置は、第１軸である回転軸８１と、第２軸である回転駆動軸８２とを結合する軸結合装置である。その構成は、回転軸８１に設けられて他方の軸をグリップするグリップ部８３ａを有するグリップ手段であるグリップ部材８３と、回転駆動軸８２に設けられてグリップ部８３ａを径方向に移動させることにより回転駆動軸８２を把持するグリップ力をグリップ部８３ａに作用させるグリップ力作用手段であるグリップ力作用部材８５とを有し、グリップ部８３ａの回転駆動軸８２をグリップする部分に複数の切り込み８６を入れて周方向に複数に分割した分割グリップ部８７をそれぞれ形成している。   The shaft coupling device of this embodiment is a shaft coupling device that couples a rotary shaft 81 that is a first shaft and a rotary drive shaft 82 that is a second shaft. The configuration includes a grip member 83 that is a grip means having a grip portion 83a that grips the other shaft provided on the rotary shaft 81, and a grip portion 83a that is provided on the rotary drive shaft 82 and moves in the radial direction. A grip force acting member 85 which is a grip force acting means for causing the grip force to grip the rotation drive shaft 82 to the grip portion 83a, and a plurality of notches 86 are formed in the grip portion 83a for gripping the rotation drive shaft 82. Divided grip portions 87 that are divided into a plurality of portions in the circumferential direction are formed.

なお、上記の場合と逆に、第２軸である回転駆動軸８２側にグリップ部材８３を設け、第１軸である回転軸８１側にグリップ力作用部材８５を設けるようにしてもよい。
グリップ部材８３は、図３に示すような形状をしていて、グリップ部８３ａの反対側の端部が回転軸８１と結合する結合部Ｌｃとなっている。 Contrary to the above case, the grip member 83 may be provided on the rotation drive shaft 82 side, which is the second axis, and the grip force acting member 85 may be provided on the rotation axis 81 side, which is the first axis.
The grip member 83 has a shape as shown in FIG. 3, and an end portion on the opposite side of the grip portion 83 a is a coupling portion Lc that is coupled to the rotation shaft 81.

この結合部Ｌｃは全体が略筒状に形成されており、その両側部には対向する（中心軸線ＣＬ周りに１８０°ずれた）配置で一対の撓み溝９９がそれぞれ切り欠き溝の形状で形成され、またそれら１対の撓み溝９９からそれぞれ中心軸線ＣＬ周りに９０°ずれた角度位置で平行に対向する配置の一対の対向面８８，８９がフライス盤などにより形成されている。このようにして結合部Ｌｃは中心軸線ＣＬに対して対称な形状に形成されている。   The coupling portion Lc is formed in a substantially cylindrical shape as a whole, and a pair of flexure grooves 99 are formed in the shape of a notch groove on opposite sides thereof (displaced by 180 ° around the central axis CL). Further, a pair of facing surfaces 88 and 89 are formed by a milling machine or the like so as to face each other in parallel at an angular position shifted by 90 ° around the central axis line CL from the pair of flexure grooves 99. In this way, the coupling portion Lc is formed in a symmetric shape with respect to the central axis CL.

また、図１に示すように、各対向面８８，８９には中心軸線ＣＬに直交する方向でそれぞれ中心軸が一致するよう孔が穿孔されており、そのうちの一方の孔（図中の上方に位置する孔）は内周面が平滑に形成された挿入孔９１であり、他方の孔（図中の下方に位置する孔）は内周面に雌ネジが形成されたネジ孔９２となっている。そして、結合部Ｌｃに挿入されている状態の回転軸８１には、それら挿入孔９１及びネジ孔９２と中心軸が一致する配置で貫通孔９３が形成されている。そして、それら挿入孔９１、貫通孔９３及びネジ孔９２が連通している状態で、ネジ部材９４を挿入孔９１から挿入し、回転軸８１を貫通させ、ネジ孔９２に螺着させている。このように、結合部Ｌｃとそこに挿入した回転軸８１とを径方向に貫通するネジ部材９４で締結することで、グリップ部材８３は回転軸８１と一体に固定されている。   Further, as shown in FIG. 1, each of the facing surfaces 88 and 89 has a hole drilled so that the center axes thereof coincide with each other in a direction perpendicular to the center axis line CL, and one of the holes (in the upper direction in the figure). The hole (positioned hole) is an insertion hole 91 having a smooth inner peripheral surface, and the other hole (a hole located in the lower part of the figure) is a screw hole 92 having a female screw formed on the inner peripheral surface. Yes. And the through-hole 93 is formed in the rotation shaft 81 of the state inserted in the coupling | bond part Lc by the arrangement | positioning in which these insertion holes 91 and the screw hole 92 correspond to a central axis. Then, in a state where the insertion hole 91, the through hole 93 and the screw hole 92 are in communication, the screw member 94 is inserted from the insertion hole 91, the rotation shaft 81 is penetrated, and is screwed into the screw hole 92. Thus, the grip member 83 is fixed integrally with the rotating shaft 81 by fastening the coupling portion Lc and the rotating shaft 81 inserted therein with the screw member 94 that penetrates in the radial direction.

このように、この実施例では、グリップ部材８３は回転軸８１に対して取り外し可能に設けられている。
なお、グリップ部材８３を回転軸８１に固定した状態では、グリップ部材８３に軸方向で貫通状態に形成している嵌合孔の軸方向の略中間に回転軸８１の先端が位置するようになる。 Thus, in this embodiment, the grip member 83 is provided so as to be removable from the rotating shaft 81.
When the grip member 83 is fixed to the rotation shaft 81, the tip of the rotation shaft 81 is positioned approximately in the middle in the axial direction of the fitting hole formed in the grip member 83 in a penetrating state in the axial direction. .

グリップ部材８３の軸方向における略中間部分は、嵌合孔８３ｂが形成された軸芯確保部Ｌｓとなっている。そして、その軸芯確保部Ｌｓは、グリップ部８３ａの複数に分割された分割グリップ部８７の根元部分から後端側（図１で左方側）で結合部Ｌｃとの間に位置しており、第１軸である回転軸８１と第２軸である回転駆動軸８２の各先端部が相互に対向して挿入される部分となっている。
このように、この実施例では、軸芯確保部Ｌｓがグリップ部材８３に形成されている。 A substantially intermediate portion in the axial direction of the grip member 83 is an axis securing portion Ls in which a fitting hole 83b is formed. The axial center securing portion Ls is located between the base portion of the divided grip portion 87 divided into a plurality of grip portions 83a and the connecting portion Lc on the rear end side (left side in FIG. 1). The tip portions of the rotary shaft 81 as the first shaft and the rotary drive shaft 82 as the second shaft are portions that are inserted facing each other.
Thus, in this embodiment, the shaft center securing portion Ls is formed in the grip member 83.

そして、図１に示すように、この軸心確保部Ｌｓと結合部Ｌｃの内径が同じになっている。すなわち、図示する例において、回転駆動軸８２が挿入されている軸心確保部Ｌｓの嵌合孔８３ｂの内径と、回転軸８１が挿入されている結合部Ｌｃの嵌合孔８３ｃの内径とが同じになっている。   As shown in FIG. 1, the inner diameters of the axial center securing portion Ls and the coupling portion Lc are the same. That is, in the illustrated example, the inner diameter of the fitting hole 83b of the shaft center securing portion Ls into which the rotation drive shaft 82 is inserted and the inner diameter of the fitting hole 83c of the coupling portion Lc into which the rotation shaft 81 is inserted. It is the same.

グリップ力作用部材８５は、グリップ部材８３側へ移動させたときにそのグリップ部材８３のグリップ部８３ａに当接してそのグリップ部８３ａを径方向に移動させることにより回転駆動軸８２を把持するグリップ力をグリップ部８３ａに作用させる働きをする。
そのグリップ力作用部材８５は、図３に示したように全体が略筒状をしていて、２箇所の対向する位置に同一深さのピン受入溝９５，９５を形成し、そこに回転駆動軸８２の先端部に径方向に貫通させて固定したピン９６を、嵌合可能にしている。 When the grip force acting member 85 is moved to the grip member 83 side, the grip force acting member 85 abuts on the grip portion 83a of the grip member 83 and moves the grip portion 83a in the radial direction to grip the rotary drive shaft 82. Acts on the grip portion 83a.
As shown in FIG. 3, the grip force acting member 85 has a substantially cylindrical shape as a whole, and has pin receiving grooves 95, 95 having the same depth at two opposing positions, and is rotationally driven there. A pin 96 fixed by penetrating in the radial direction at the tip of the shaft 82 can be fitted.

そのグリップ力作用部材８５のグリップ部材８３側の内周面には、図１に示すように雌ネジ部８５ａを形成し、その雌ネジ部８５ａに対応させてグリップ部材８３側には雄ネジ部８３ｄを形成し、それらのネジ部を互いに螺合させたときにグリップ力作用部材８５がグリップ部材８３側へ移動するようにしている。   As shown in FIG. 1, a female screw portion 85a is formed on the inner peripheral surface of the grip force acting member 85 on the grip member 83 side, and a male screw portion is formed on the grip member 83 side so as to correspond to the female screw portion 85a. 83d is formed, and when these screw portions are screwed together, the grip force acting member 85 moves to the grip member 83 side.

そのグリップ部材８３のグリップ力作用部材８５との接触部となる複数の各分割グリップ部８７は、把持力を周方向から均等に加えやすくするため、それぞれテーパ状に形成されている。そして、グリップ力作用部材８５をグリップ部材８３側へ移動させたときに、そのグリップ力作用部材８５の内面のテーパ面８５ｂがグリップ部材８３のテーパ状の接触部に当接して、グリップ部材８３の各分割グリップ部８７が回転駆動軸８２を把持する径方向（内径を小さくする方向）にそれぞれ移動する。
なお、図１で回転軸８１の左側に設置されている９７は、後述する感光体などの回転体に係合して一体に回転する回転体係合部材であり、９８は後述する本体フレームなどに支持される軸受である。（これら感光体や本体フレームについては後述の回転伝達装置と画像形成装置の実施例で説明する） Each of the plurality of divided grip portions 87 serving as a contact portion of the grip member 83 with the grip force acting member 85 is formed in a tapered shape in order to easily apply a gripping force from the circumferential direction. When the grip force acting member 85 is moved toward the grip member 83, the tapered surface 85 b of the inner surface of the grip force acting member 85 comes into contact with the tapered contact portion of the grip member 83, and the grip member 83 Each divided grip portion 87 moves in the radial direction (direction in which the inner diameter is reduced) that grips the rotary drive shaft 82.
In FIG. 1, reference numeral 97 installed on the left side of the rotating shaft 81 is a rotating member engaging member that rotates integrally with a rotating member such as a photoconductor described later, and 98 is a main body frame described later. It is a bearing supported by. (These photoconductors and main body frame will be described in the examples of the rotation transmission device and the image forming apparatus described later).

この軸結合装置により、回転軸８１と回転駆動軸８２とを結合するときは、まず回転軸８１の先端部に設けられて回転駆動軸８２をグリップするグリップ部材８３に形成されている雄ネジ部８３ｄに、グリップ力作用部材８５に形成されている雌ネジ部８５ａを浅く螺合させる。
そして、その状態でグリップ力作用部材８５のピン受入溝９５（図２，図３）に、回転駆動軸８２の先端部に貫通状態で固定しているピン９６を相対回転不能に係合させる（図２の状態）。この状態で、回転軸８１の回転を規制した状態のまま回転駆動軸８２を、雄ネジ部８３ｄと雌ネジ部８５ａとの螺合が深くなる方向に回転させ、そのネジ部の螺合位置を深くする。 When the rotary shaft 81 and the rotary drive shaft 82 are connected by this shaft coupling device, the male screw portion formed on the grip member 83 that is provided at the tip of the rotary shaft 81 and grips the rotary drive shaft 82 first. The female screw portion 85a formed on the grip force acting member 85 is shallowly screwed into 83d.
Then, in this state, a pin 96 fixed in a penetrating state to the tip end portion of the rotary drive shaft 82 is engaged with the pin receiving groove 95 (FIGS. 2 and 3) of the grip force acting member 85 so as not to be relatively rotatable ( The state of FIG. In this state, the rotation drive shaft 82 is rotated in a direction in which the male screw portion 83d and the female screw portion 85a are deepened while the rotation of the rotary shaft 81 is restricted, and the screwing position of the screw portion is adjusted. Deepen.

それにより、グリップ力作用部材８５がグリップ部材８３側（図１で左方側）に移動し、グリップ力作用部材８５のテーパ面８５ｂがグリップ部８３ａの各分割グリップ部８７を径方向にそれぞれ移動させるので、グリップ部８３ａが回転駆動軸８２をしっかりと確実に把持する。
この軸結合方法を実施すれば、回転駆動軸８２から回転軸８１への回転力の伝達は、最初の雄ネジ部８３ｄと雌ネジ部８５ａを浅く螺合させた状態のときは、回転駆動軸８２からの回転力はピン９６を介してグリップ力作用部材８５、グリップ部材８３、回転軸８１に伝達されるため、ピン９６とそれを嵌合させたグリップ力作用部材８５のピン受入溝９５との間の隙間に生じるガタをもって伝達される。 Thereby, the grip force acting member 85 moves to the grip member 83 side (left side in FIG. 1), and the tapered surface 85b of the grip force acting member 85 moves in the radial direction on each divided grip portion 87 of the grip portion 83a. Therefore, the grip part 83a holds the rotation drive shaft 82 firmly and securely.
If this shaft coupling method is carried out, the transmission of the rotational force from the rotary drive shaft 82 to the rotary shaft 81 is performed when the first male screw portion 83d and the female screw portion 85a are shallowly screwed together. Since the rotational force from 82 is transmitted to the grip force acting member 85, the grip member 83, and the rotating shaft 81 via the pin 96, the pin 96 and the pin receiving groove 95 of the grip force acting member 85 with which the pin 96 is fitted, It is transmitted with the play which arises in the gap between.

しかしながら、雄ネジ部８３ｄと雌ネジ部８５ａとの螺合が深まると、上述したようにグリップ力作用部材８５がグリップ部８３ａを径方向（小径になる方向）にそれぞれ移動させることにより、グリップ部８３ａが回転駆動軸８２にしっかりと固定されて一体化され、その一体化した部分でトルクの伝達が可能となるため、この時点ではピン９６による力の伝達位置は完全にグリップ力作用部材８５とグリップ部８３ａとの把持位置へと移行する。それにより、ピン９６とピン受入溝９５との間のガタによるトルクの伝達ムラは発生しないので、回転軸８１と回転駆動軸８２とを軸芯を高精度（同軸度）で一致させた状態で確実に結合させることができる。   However, when the screwing between the male screw portion 83d and the female screw portion 85a is deepened, the grip force acting member 85 moves the grip portion 83a in the radial direction (the direction in which the diameter becomes smaller) as described above. 83a is firmly fixed to and integrated with the rotary drive shaft 82, and torque can be transmitted at the integrated portion. Therefore, at this time, the force transmission position by the pin 96 is completely the same as the grip force acting member 85. Transition to a gripping position with the grip portion 83a. As a result, there is no torque transmission unevenness between the pin 96 and the pin receiving groove 95, so that the rotary shaft 81 and the rotary drive shaft 82 are aligned with high accuracy (coaxiality). It can be securely combined.

このように、この軸結合装置では、グリップ力作用部材８５と回転駆動軸８２との係合は、グリップ力作用部材８５に切り欠き溝で形成したピン受入溝９５に回転駆動軸８２の先端部に軸を径方向に貫通させて両端部を軸表面からそれぞれ突出させたピン９６を挿入させることによる係合であり、回転駆動軸８２から回転軸８１への回転力の伝達は、最初はピン９６からピン受入溝９５を介して行われ、雄ネジ部８３ｄと雌ネジ部８５ａとの螺合位置が深くなってからは直接回転駆動軸８２とその回転駆動軸８２を把持した状態にあるグリップ部８３ａに切り換わる軸結合方法が実施される。   As described above, in this shaft coupling device, the grip force acting member 85 and the rotation drive shaft 82 are engaged with each other in the pin receiving groove 95 formed by the notch groove in the grip force acting member 85 in the tip portion of the rotation drive shaft 82. Is engaged by inserting a pin 96 having a shaft penetrated in the radial direction and projecting both ends from the shaft surface, and transmission of the rotational force from the rotary drive shaft 82 to the rotary shaft 81 is initially performed by a pin. The grip which is carried out from 96 through the pin receiving groove 95 and which directly holds the rotary drive shaft 82 and the rotary drive shaft 82 after the screwing position of the male screw portion 83d and the female screw portion 85a is deepened. A shaft coupling method for switching to the portion 83a is performed.

ところで、図１に示したように、回転軸８１と回転駆動軸８２との結合状態では、回転駆動軸８２の先端部はグリップ部材８３の軸芯確保部Ｌｓの範囲にある嵌合孔８３ｂまで挿入された状態で回転軸８１と一体化するので、回転軸８１と回転駆動軸８２の軸芯を、極めて高い精度で一致させることができる。
さらに、回転駆動軸８２を把持するグリップ部材８３のグリップ部８３ａは、それを周方向に複数に分割して分割グリップ部８７とし、その部分は先端の厚さが薄くなるテーパ状に形成してあるので、その部分により把持力を回転駆動軸８２に周方向から均等に加えることができる。したがって、安定した把持力が得られる。 Incidentally, as shown in FIG. 1, in the coupled state of the rotary shaft 81 and the rotary drive shaft 82, the tip of the rotary drive shaft 82 extends to the fitting hole 83 b in the range of the axis securing portion Ls of the grip member 83. Since it is integrated with the rotary shaft 81 in the inserted state, the axis of the rotary shaft 81 and the rotary drive shaft 82 can be matched with extremely high accuracy.
Further, the grip portion 83a of the grip member 83 that holds the rotary drive shaft 82 is divided into a plurality of divided grip portions 87 in the circumferential direction, and this portion is formed in a tapered shape with a thin tip. Therefore, the gripping force can be evenly applied to the rotational drive shaft 82 from the circumferential direction by the portion. Therefore, a stable gripping force can be obtained.

また、この実施例では、グリップ部材８３を回転軸８１にネジ部材９４により固定して、それらを一体的に形成しているので、グリップ部材８３と回転軸８１との間におけるバラツキを小さくすることができる。
そして、結合部Ｌｃが前述したように中心軸線ＣＬに対して対称な形状に形成されているため、結合部Ｌｃに回転軸８１を挿入させた状態でそれらを径方向に貫通するネジ部材９４により径方向の締結を強めた場合には、結合部Ｌｃが中心軸線ＣＬに対して対称に撓みながら回転軸８１を把持することになる。したがって、グリップ部材８３は回転軸８１と軸芯を一致させながら結合することができ、すなわちグリップ部材８３を介して回転軸８１と回転駆動軸８２とが高い精度で互いに軸芯を一致させ確実に連結することができる。 Further, in this embodiment, the grip member 83 is fixed to the rotating shaft 81 by the screw member 94 and is integrally formed, so that the variation between the grip member 83 and the rotating shaft 81 is reduced. Can do.
Since the coupling portion Lc is formed in a symmetric shape with respect to the central axis CL as described above, the screw member 94 that penetrates the coupling portion Lc in the radial direction with the rotary shaft 81 inserted therein is used. When the fastening in the radial direction is strengthened, the coupling portion Lc grips the rotating shaft 81 while bending symmetrically with respect to the central axis CL. Therefore, the grip member 83 can be coupled with the rotation shaft 81 and the axis aligned, that is, the rotation shaft 81 and the rotation drive shaft 82 can be reliably aligned with each other with high accuracy via the grip member 83. Can be linked.

また、特に一対の撓み溝９９が中心軸線ＣＬに対して対称に形成されているため、それらにより周方向に分割された部分が互いに中心軸線ＣＬに対して対称に撓みやすくなっており、これら分割部分で回転軸８１を挟持することからもグリップ部材８３と高い精度で軸芯を一致させる効果を発揮している。さらに、一対の対向面８８、８９が中心軸線ＣＬに対して対称な配置で形成されていることによっても、略筒状にある結合部Ｌｃの径方向の肉厚を中心軸線ＣＬに対して対称的に薄くしていることから、結合部Ｌｃの中心軸線ＣＬに対する撓みの対称性を助成する効果を奏している。
なお、グリップ部材８３を回転駆動軸８２側に設ける構成にした場合には、同様にそのグリップ部材８３を回転駆動軸８２に一体的に形成するとよい。 In particular, since the pair of bending grooves 99 are formed symmetrically with respect to the central axis CL, the portions divided in the circumferential direction by them are easily bent symmetrically with respect to the central axis CL. Since the rotating shaft 81 is sandwiched between the portions, the effect of matching the shaft core with the grip member 83 with high accuracy is exhibited. Furthermore, the thickness in the radial direction of the substantially cylindrical coupling portion Lc is symmetrical with respect to the central axis CL by forming the pair of opposing surfaces 88 and 89 symmetrically with respect to the central axis CL. Therefore, the effect of assisting the symmetry of bending with respect to the central axis CL of the coupling portion Lc is achieved.
When the grip member 83 is provided on the rotation drive shaft 82 side, the grip member 83 may be formed integrally with the rotation drive shaft 82 in the same manner.

また、図１に示すように、回転軸８１と回転駆動軸８２が挿入されている軸心確保部Ｌｓと結合部Ｌｃの内径が同じであるため、２軸間の偏芯を防いで軸芯同士を高い精度で一致させることができる。さらに、軸心確保部Ｌｓと結合部Ｌｃの内径が同じであることで、挿入される２つの回転軸８１と回転駆動軸８２は互いに同じ外径で形成されることになり、それぞれの挿入部分におけるガタの発生条件が同じとなるため、それら同じ大きさのガタが相殺し合うことでそれら回転軸８１と回転駆動軸８２の軸芯を極めて高い精度で一致させることができる効果もある。   Further, as shown in FIG. 1, since the inner diameters of the shaft center securing portion Ls and the coupling portion Lc into which the rotary shaft 81 and the rotary drive shaft 82 are inserted are the same, the eccentricity between the two shafts is prevented and the shaft core is prevented. They can be matched with high accuracy. Further, since the inner diameters of the shaft center securing portion Ls and the coupling portion Lc are the same, the two rotation shafts 81 and the rotation drive shaft 82 to be inserted are formed with the same outer diameter. Since the occurrence conditions of the backlash are the same, the backlash of the same size cancels each other, so that there is an effect that the axes of the rotary shaft 81 and the rotary drive shaft 82 can be matched with extremely high accuracy.

〔回転伝達装置と画像形成装置の実施例〕
次に、この発明による回転伝達装置と画像形成装置の実施例について説明する。
図４はこの発明による回転伝達装置の一実施例である感光体とその駆動系を示す図、図５は同じくその回転伝達装置付近を示す拡大図、図６はこの発明による画像形成装置の一実施例を示す構成図であり、図１及び図２と対応する部分には同一の符号を付してある。
この実施例の画像形成装置は、その全体の構成を図６に示すように、画像を担持しながら回動する中間転写ベルト１０を備えたカラー複写機の例を示している。 [Embodiments of rotation transmission device and image forming apparatus]
Next, embodiments of the rotation transmission device and the image forming apparatus according to the present invention will be described.
FIG. 4 is a diagram showing a photosensitive member and its drive system as an embodiment of the rotation transmission device according to the present invention, FIG. 5 is an enlarged view similarly showing the vicinity of the rotation transmission device, and FIG. 6 is an image forming apparatus according to the present invention. It is a block diagram which shows an Example, The same code | symbol is attached | subjected to the part corresponding to FIG.1 and FIG.2.
As shown in FIG. 6, the image forming apparatus according to this embodiment is an example of a color copying machine including an intermediate transfer belt 10 that rotates while carrying an image.

このカラー複写機は、カラーのコピーをとるときは、原稿自動給送装置４の原稿台３０上に原稿をセットする。また、手動で原稿をセットする場合には、原稿自動給送装置４を開いてスキャナ３のコンタクトガラス３２上に原稿をセットし、原稿自動給送装置４を閉じてそれを押える。   This color copying machine sets a document on the document table 30 of the automatic document feeder 4 when making a color copy. When the document is set manually, the automatic document feeder 4 is opened, the document is set on the contact glass 32 of the scanner 3, and the automatic document feeder 4 is closed and pressed.

そして、不図示のスタートスイッチを押すと、原稿自動給送装置４に原稿をセットしたときは、その原稿がコンタクトガラス３２上に給送される。また、手動で原稿をコンタクトガラス３２上にセットしたときは、直ちにスキャナ３が駆動し、第１走行体３３及び第２走行体３４が走行を開始する。そして、第１走行体３３の光源から光が原稿に向けて照射され、その原稿面からの反射光が第２走行体３４に向かうと共に、その光が第２走行体３４のミラーで反射して結像レンズ３５を通して読取りセンサ３６に入射して、原稿の内容が読み取られる。   When a start switch (not shown) is pressed, when the document is set on the automatic document feeder 4, the document is fed onto the contact glass 32. When the document is manually set on the contact glass 32, the scanner 3 is immediately driven, and the first traveling body 33 and the second traveling body 34 start traveling. Then, light is emitted from the light source of the first traveling body 33 toward the document, and reflected light from the document surface is directed to the second traveling body 34, and the light is reflected by the mirror of the second traveling body 34. The light enters the reading sensor 36 through the imaging lens 35 and the content of the original is read.

また、上述したスタートスイッチの押下により、中間転写装置２０の中間転写ベルト１０が回動を開始する。さらに、それと同時に各感光体４０Ｙ，４０Ｃ，４０Ｍ，４０Ｋが回転を開始して、その各感光体上に帯電装置６０，露光装置２１，現像装置６１，１次転写装置６２，感光体クリーニング装置６３，除電装置６４を使用して、イエロー，シアン，マゼンタ，ブラックの各単色画像を形成する動作を開始する。そして、その各感光体上に形成された各色の画像は、図６で時計回り方向に回動する中間転写ベルト１０上に重ね合わせ状態に順次転写されていき、そこにフルカラーの合成カラー画像が形成される。
なお、中間転写ベルト１０は、ベルト駆動ローラ９と従動ローラ１５，１６に回動可能に張架されている。 Further, the intermediate transfer belt 10 of the intermediate transfer device 20 starts to rotate when the start switch is pressed. At the same time, the photoconductors 40Y, 40C, 40M, and 40K start rotating, and the charging device 60, the exposure device 21, the developing device 61, the primary transfer device 62, and the photoconductor cleaning device 63 are provided on the photoconductors. , Using the static eliminator 64, the operation of forming each monochrome image of yellow, cyan, magenta and black is started. The respective color images formed on the respective photoreceptors are sequentially transferred in an overlapping state on the intermediate transfer belt 10 that rotates in the clockwise direction in FIG. 6, and a full-color composite color image is formed there. It is formed.
The intermediate transfer belt 10 is stretched around a belt driving roller 9 and driven rollers 15 and 16 so as to be rotatable.

一方、上述したスタートスイッチの押下により、給紙テーブル２内の選択された給紙段の給紙ローラ４２が回転し、ペーパーバンク４３の中の選択された１つの給紙カセット４４からシートＰが繰り出され、それが分離ローラ４５により１枚に分離されて給紙路４６に搬送される。
そのシートＰは、搬送ローラ４７により複写機本体１内の給紙路４８に搬送され、レジストローラ４９に突き当たって一旦停止する。 On the other hand, when the start switch described above is pressed, the paper feed roller 42 of the selected paper feed stage in the paper feed table 2 rotates, and the sheet P is fed from one selected paper feed cassette 44 in the paper bank 43. The paper is fed out, separated into one sheet by the separation roller 45, and conveyed to the paper feed path 46.
The sheet P is conveyed by a conveyance roller 47 to a paper feed path 48 in the copying machine main body 1, hits a registration roller 49 and temporarily stops.

また、手差し給紙の場合には、手差しトレイ５１上にセットされたシートＰが給紙ローラ５０の回転により繰り出され、それが分離ローラ５２により１枚に分離されて手差し給紙路５３に搬送され、レジストローラ４９に突き当たって一旦停止状態になる。
そのレジストローラ４９は、中間転写ベルト１０上の合成カラー画像に合わせた正確なタイミングで回転を開始し、一旦停止状態にあったシートＰを中間転写ベルト１０と２次転写装置２２との間に送り込む。そして、そのシートＰ上に２次転写装置２２によりカラー画像が転写される。 In the case of manual sheet feeding, the sheet P set on the manual tray 51 is fed out by the rotation of the sheet feeding roller 50, and is separated into one sheet by the separation roller 52 and conveyed to the manual sheet feeding path 53. Then, it hits the registration roller 49 and temporarily stops.
The registration roller 49 starts to rotate at an accurate timing in accordance with the composite color image on the intermediate transfer belt 10, and temporarily stops the sheet P between the intermediate transfer belt 10 and the secondary transfer device 22. Send it in. Then, a color image is transferred onto the sheet P by the secondary transfer device 22.

その画像が転写されたシートＰは、搬送装置としての機能も有する２次転写装置２２により定着装置２５へ搬送され、そこで熱と加圧力が加えられることにより転写画像が定着される。その後、そのシートＰは、切換爪５５により排出側に案内され、排出ローラ５６により排紙トレイ５７上に排出されてそこにスタックされる。   The sheet P on which the image has been transferred is conveyed to a fixing device 25 by a secondary transfer device 22 that also functions as a conveying device, where heat and pressure are applied to fix the transferred image. Thereafter, the sheet P is guided to the discharge side by the switching claw 55, discharged by the discharge roller 56 onto the discharge tray 57, and stacked there.

また、両面コピーモードが選択されているときには、片面に画像を形成したシートＰを切換爪５５によりシート反転装置２８側に搬送し、そこで反転させて再び転写位置へ導き、今度は裏面に画像を形成した後に、排出ローラ５６により排紙トレイ５７上に排出する。
なお、画像のシートＰへの転写後に、中間転写ベルト１０の表面はクリーニング装置１７によりクリーニングされる。 When the double-sided copy mode is selected, the sheet P on which an image is formed on one side is conveyed to the sheet reversing device 28 side by the switching claw 55, reversed there and led again to the transfer position, and this time the image is printed on the back side. After the formation, the paper is discharged onto a paper discharge tray 57 by a discharge roller 56.
Note that the surface of the intermediate transfer belt 10 is cleaned by the cleaning device 17 after the image is transferred to the sheet P.

このカラー複写機は、４つの感光体４０をそれぞれ支持する第１軸となる図５に示す回転体係合軸１０１（図１の回転軸８１に対応する）と、モータ５の第２軸となる回転駆動軸１０２（図１の回転駆動軸８２に対応する）との結合に、図１から図３を使用して説明した内容と同様の軸結合を行っている。したがって、その軸結合に関する構成の説明は重複するので省略する。   This color copying machine includes a rotating body engaging shaft 101 (corresponding to the rotating shaft 81 in FIG. 1) shown in FIG. 5 as a first shaft for supporting the four photoreceptors 40, a second shaft of the motor 5, and the like. The same shaft coupling as described with reference to FIGS. 1 to 3 is performed for coupling to the rotational drive shaft 102 (corresponding to the rotational drive shaft 82 in FIG. 1). Therefore, the description of the configuration related to the shaft coupling is redundant and will be omitted.

そこで、この発明による回転伝達装置の実施例をこの画像形成装置によって説明する。
各感光体（回転体）４０は、図５に示すように軸方向の一端部のフランジに円錐形状部６を形成している。そして、その円錐形状部６に対応して、回転体係合軸（回転軸）１０１に回転体係合部材９７を固定すると共に、回転体係合軸１０１には感光体４０を回転可能に支持する軸受９８も取り付けている。
この各感光体４０は、図４に示すように中心部に回転体係合軸１０１を嵌入させた状態で、全体が同図で左端面側に設けられている付勢スプリング７により図示しない中間部材を介して回転体係合部材９７側に付勢されている。 An embodiment of the rotation transmission device according to the present invention will be described with reference to this image forming apparatus.
As shown in FIG. 5, each photoconductor (rotating body) 40 has a conical portion 6 formed on a flange at one end in the axial direction. Then, corresponding to the conical portion 6, the rotating body engaging member 97 is fixed to the rotating body engaging shaft (rotating shaft) 101, and the photosensitive member 40 is rotatably supported on the rotating body engaging shaft 101. A bearing 98 is also attached.
As shown in FIG. 4, each of the photoreceptors 40 has an intermediate portion (not shown) provided by a biasing spring 7 provided on the left end face side in the same figure with the rotating body engaging shaft 101 inserted in the center. It is biased toward the rotating body engaging member 97 through the member.

それにより、図５に示したように円錐形状部６が回転体係合軸１０１に固定された回転体係合部材９７に押し付けられてそれらが互いに係合し、感光体４０が回転体係合軸１０１と一体になりガタ無く回転可能となる。
回転体係合軸１０１は、回転体係合部材９７が設けられている側と反対側の端部が、図４に示すようにカラー複写機の本体フレーム８に軸受１１を介して軸支されている。そして、このカラー複写機では、この構成で４個全ての感光体４０がそれぞれ支持されていて、それらが各モータ５により回転可能になっている。 As a result, as shown in FIG. 5, the conical portion 6 is pressed against the rotating member engaging member 97 fixed to the rotating member engaging shaft 101 so that they are engaged with each other, and the photoreceptor 40 is engaged with the rotating member. It becomes integral with the shaft 101 and can rotate without play.
The rotating body engaging shaft 101 is pivotally supported on the main body frame 8 of the color copying machine via a bearing 11 as shown in FIG. 4 at the end opposite to the side on which the rotating body engaging member 97 is provided. ing. In this color copying machine, all four photoconductors 40 are supported by this configuration, and can be rotated by each motor 5.

この回転伝達装置における回転体係合軸１０１とモータ５の回転駆動軸１０２との軸結合は、上述したように図１から図３を使用して説明したものと同様な構成で軸結合が行われるが、そのモータ５は、この実施例では減速機構を有さない直接駆動方式のモータである。
したがって、減速ギヤを介して回転力を出力する駆動方式のモータを使用した場合に比べて、その減速ギヤ精度のバラツキによる回転ムラを防止することができるので、感光体４０の回転ムラに起因する画像の副走査方向のずれを防止することができる。 The shaft coupling between the rotating body engaging shaft 101 and the rotation drive shaft 102 of the motor 5 in this rotation transmission device is performed with the same configuration as described with reference to FIGS. 1 to 3 as described above. However, the motor 5 is a direct drive motor that does not have a speed reduction mechanism in this embodiment.
Therefore, it is possible to prevent rotation unevenness due to variations in the accuracy of the reduction gear as compared with the case where a drive type motor that outputs rotational force via a reduction gear is used. It is possible to prevent the image from being displaced in the sub-scanning direction.

なお、モータ５の正回転方向は、それを正回転で回転させたときに、図１で説明したグリップ部材８３の雄ネジ部８３ｄとグリップ力作用部材８５の雌ネジ部８５ａとの螺合がゆるむ回転方向と逆側に設定してある。
したがって、回転体係合軸１０１と回転駆動軸１０２とをこの回転伝達装置により結合させた後、モータ５を正回転させてもグリップ部８３ａによる回転駆動軸１０２の把持力が弱まることはない。 The forward rotation direction of the motor 5 is such that when the motor 5 is rotated forwardly, the male screw portion 83d of the grip member 83 and the female screw portion 85a of the grip force acting member 85 described in FIG. It is set on the opposite side to the loosening direction.
Therefore, the gripping force of the rotary drive shaft 102 by the grip portion 83a is not weakened even if the motor 5 is rotated forward after the rotary body engaging shaft 101 and the rotary drive shaft 102 are coupled by the rotation transmission device.

このように、このカラー複写機は、回転体であるドラム状の感光体４０を支持する回転体支持軸となる回転体係合軸１０１と、その回転体係合軸１０１を回転させるモータ５の出力軸である回転駆動軸１０２と、その回転体係合軸１０１とモータ５の回転駆動軸１０２とを結合するこの発明による軸回転伝達装置とを備えている。   As described above, the color copying machine includes a rotating body engaging shaft 101 serving as a rotating body supporting shaft that supports the drum-shaped photosensitive body 40 that is a rotating body, and the motor 5 that rotates the rotating body engaging shaft 101. A rotation drive shaft 102 as an output shaft, and a shaft rotation transmission device according to the present invention that couples the rotary member engagement shaft 101 and the rotation drive shaft 102 of the motor 5 are provided.

そして、その軸伝達装置には、回転体係合軸１０１に設けられて回転駆動軸１０２をグリップするグリップ部８３ａを有するグリップ部材８３と、回転駆動軸１０２に設けられてグリップ部８３ａを径方向に移動させることにより回転駆動軸１０２を把持するグリップ力をグリップ部８３ａに作用させるグリップ力作用部材８５とを設けているので、回転体係合軸１０１と回転駆動軸１０２の軸芯を、極めて高い精度で一致させて一体化することができる。   The shaft transmission device includes a grip member 83 having a grip portion 83a provided on the rotating body engaging shaft 101 and gripping the rotation drive shaft 102, and a grip member 83a provided on the rotation drive shaft 102 in the radial direction. Since the grip force application member 85 that causes the grip portion 83a to exert a grip force for gripping the rotary drive shaft 102 by moving the rotary drive shaft 102 to each other, the axes of the rotary body engaging shaft 101 and the rotary drive shaft 102 are extremely They can be integrated with high accuracy.

それにより、各感光体４０の回転ムラを防止することができるので、高画質の画像が得られる。特にカラー複写機において、複数色のトナーをそれぞれ分担して画像を形成する複数個の感光体４０のぞれそれの回転ムラを同時に防止できることは、カラー画像の品質を高める効果として絶大である。
なお、回転駆動軸１０２側にグリップ部を設け、そのグリップ部により回転体係合軸１０１を把持するようにしても、同様の作用効果が得られる。 Thereby, rotation unevenness of each photoconductor 40 can be prevented, and a high-quality image can be obtained. In particular, in a color copying machine, the ability to simultaneously prevent uneven rotation of each of a plurality of photoreceptors 40 that form an image by sharing a plurality of color toners is a great effect of improving the quality of a color image.
It is to be noted that a similar effect can be obtained by providing a grip portion on the rotary drive shaft 102 side and gripping the rotating body engaging shaft 101 by the grip portion.

また、この実施例では、回転体係合軸１０１に、感光体４０に係合してその感光体４０と一体に回転する回転体係合部材９７を一体的に設けると共に、回転体係合軸１０１を回転可能に支持する軸受９８を設け、且つ感光体４０を回転体係合軸１０１対して着脱可能にしているので、メンテナンス性がよくなるため、サービス性が向上する。   Further, in this embodiment, the rotating body engaging shaft 101 is integrally provided with a rotating body engaging member 97 that engages with the photoconductor 40 and rotates integrally with the photoconductor 40. Since the bearing 98 for rotatably supporting the 101 is provided and the photosensitive member 40 is detachably attached to the rotating body engaging shaft 101, the maintainability is improved and the serviceability is improved.

なお、上述の実施例はフルカラーのカラー複写機にこの発明を適用し、そのＹＣＭＫの各色の画像形成用の４個のドラム状の感光体４０Ｙ，４０Ｃ，４０Ｍ，４０Ｋの各回転軸と、それをそれぞれ回転駆動する各モータ５の回転駆動軸１０２との間に、この発明による回転伝達装置を設けているが、モノクロの複写機やプリンタ等の画像形成装置に適用する場合は感光体は１個である。   In the above-described embodiment, the present invention is applied to a full-color color copying machine, and each of the four drum-shaped photoreceptors 40Y, 40C, 40M, and 40K for image formation of each color of YCMK, The rotation transmission device according to the present invention is provided between the rotation drive shafts 102 of the respective motors 5 that rotate the motors. However, when applied to an image forming apparatus such as a monochrome copying machine or a printer, the photosensitive member is one. It is a piece.

また、画像形成に用いる回転体はドラム状の感光体に限らず、ベルト状の感光体や転写ベルトあるいは中間転写ベルト、用紙搬送ベルト、用紙搬送ローラ、転写ローラなど各種の回転体に回転を伝達する場合にも、この発明を適用することができる。さらに、画像形成装置以外の各種装置における回転体に回転を伝達する場合にも適用できる。   The rotating member used for image formation is not limited to the drum-shaped photosensitive member, and the rotation is transmitted to various rotating members such as a belt-shaped photosensitive member, a transfer belt, an intermediate transfer belt, a paper conveying belt, a paper conveying roller, and a transfer roller. The present invention can also be applied to this case. Furthermore, the present invention can also be applied to the case where rotation is transmitted to a rotating body in various apparatuses other than the image forming apparatus.

この発明による軸結合装置は、２本の軸を精度良く軸心を一致させて連結する各種の軸結合装置およびそれを備えた装置に利用でき、この発明による回転伝達装置は、駆動モータとそれによって回転される回転体の回転軸とを軸芯を一致させて連結し、回転体を回転ムラなく回転させることが必要な各種装置に利用できる。さらに、この発明による画像形成装置は、画像形成に用いる感光体等の回転体を備えたモノクロ及びカラーの複写機、プリンタ、ファクシミリ装置、デジタル複合機等の各種の画像形成装置に利用できる。   The shaft coupling device according to the present invention can be used in various shaft coupling devices that connect two shafts with the shaft centers accurately aligned and a device including the shaft coupling device. The rotating shaft of the rotating body rotated by the above can be connected to the rotating shaft of the rotating body so that the axes coincide with each other, and the rotating body can be used for various devices that need to rotate without rotation unevenness. Furthermore, the image forming apparatus according to the present invention can be used in various image forming apparatuses such as monochrome and color copying machines, printers, facsimile machines, digital multifunction peripherals, and the like, each having a rotating body such as a photoconductor used for image formation.

この発明による軸結合装置の一実施例によって第１軸と第２軸とを結合した状態を示す断面図である。It is sectional drawing which shows the state which couple | bonded the 1st axis | shaft and the 2nd axis | shaft by one Example of the axis | shaft coupling device by this invention. 同じくその２つの軸を結合させた状態を示す斜視図である。It is a perspective view which similarly shows the state which couple | bonded the two axis | shafts. 同じくその２つの軸を結合させる前の状態を示す分解斜視図である。Similarly, it is an exploded perspective view showing a state before joining the two shafts. この発明による回転伝達装置の一実施例である感光体とその駆動系を示す図である。1 is a diagram showing a photoconductor and its drive system as an embodiment of a rotation transmission device according to the present invention. 同じくその回転伝達装置付近を示す拡大図である。It is the enlarged view which similarly shows the rotation transmission device vicinity. この発明による画像形成装置の一実施例を示す構成図である。1 is a configuration diagram showing an embodiment of an image forming apparatus according to the present invention.

符号の説明Explanation of symbols

１：複写機本体、５：モータ、９：ベルト駆動ローラ、１０：中間転写ベルト、
４０Ｙ，４０Ｃ，４０Ｍ，４０Ｋ：感光体（回転体）、６０：帯電装置、６１：現像装置、
６３：感光体クリーニング装置、８１，８１′：回転軸（第１軸）、
８２，１０２：回転駆動軸（第２軸，出力軸）、８３：グリップ部材（グリップ手段）、
８３ａ：グリップ部、８３ｂ，８３ｃ：嵌合孔、８３ｄ：雄ネジ部、
８５：グリップ力作用部材（グリップ力作用手段）、
８５ａ：雌ネジ部、８５ｂ：テーパ面、８７：分割グリップ部、９１：挿入孔、
９２：ネジ孔、９５：ピン受入溝、９６：ピン、９７：回転体係合部材（回転係合部材）、
９８：軸受、９９：撓み溝、１０１：回転体係合軸（第１軸，回転体支持軸）、
Ｌｓ：軸芯確保部、Ｌｃ：結合部 1: copier body, 5: motor, 9: belt drive roller, 10: intermediate transfer belt,
40Y, 40C, 40M, 40K: photosensitive member (rotating member), 60: charging device, 61: developing device,
63: Photoconductor cleaning device, 81, 81 ′: Rotating shaft (first shaft),
82, 102: Rotation drive shaft (second shaft, output shaft), 83: Grip member (grip means),
83a: grip part, 83b, 83c: fitting hole, 83d: male screw part,
85: Grip force acting member (grip force acting means),
85a: Female thread part, 85b: Tapered surface, 87: Split grip part, 91: Insertion hole,
92: screw hole, 95: pin receiving groove, 96: pin, 97: rotating body engaging member (rotating engaging member),
98: Bearing, 99: Deflection groove, 101: Rotating body engaging shaft (first shaft, rotating body support shaft),
Ls: shaft core securing portion, Lc: coupling portion

Claims (5)

第１軸と第２軸とを結合する軸結合装置であって、
前記第１軸と第２軸のいずれか一方の軸に、他方の軸をグリップするグリップ部を有するグリップ部材を設け、
前記他方の軸に、該軸によって回転されることによって前記グリップ部を径方向に移動させて前記他方の軸を把持するグリップ力を前記グリップ部に作用させるグリップ力作用部材を設け、
前記グリップ部の前記他方の軸をグリップする部分を周方向に複数に分割し、
前記グリップ部材は、前記グリップ部と一体に前記一方の軸を挿入させる結合部を有し、該結合部とそこに挿入された前記一方の軸とを径方向に貫通するネジ部材で締結し、
前記結合部は中心軸線に対して対称な形状に形成されており、前記グリップ部の根元部分と前記結合部との間に前記第１軸と第２軸の各先端部が相互に対向して挿入される軸芯確保部を有し、該軸芯確保部と前記結合部の内径が同じであることを特徴とする軸結合装置。 A shaft coupling device for coupling the first shaft and the second shaft,
A grip member having a grip portion for gripping the other shaft is provided on one of the first shaft and the second shaft,
Wherein the other axis, the gripping force acting member for applying a gripping force for gripping the shaft of the other by moving the grip portion in a radial direction to said grip portion by being rotated by a shaft provided,
Dividing the portion that grips the other shaft of the grip portion into a plurality of portions in the circumferential direction;
The grip member has a coupling portion for inserting the one shaft integrally with the grip portion, and is fastened with a screw member that penetrates the coupling portion and the one shaft inserted therein in a radial direction,
The coupling portion is formed in a symmetrical shape with respect to a central axis, and the tip portions of the first shaft and the second shaft are opposed to each other between the base portion of the grip portion and the coupling portion. A shaft coupling device having an inserted shaft core securing portion, wherein the shaft core securing portion and the coupling portion have the same inner diameter . 請求項１記載の軸結合装置を用いた回転伝達装置であって、前記第１軸と第２軸の一方が回転体を支持する回転体支持軸であり、他方が該回転体支持軸を回転させるモータの出力軸であり、前記回転体支持軸には前記回転体に係合して前記回転体と一体に回転する回転体係合部材を一体的に設けると共に、前記回転体支持軸を回転可能に支持する軸受を設けたことを特徴とする回転伝達装置。   The rotation transmission device using the shaft coupling device according to claim 1, wherein one of the first shaft and the second shaft is a rotating body support shaft that supports the rotating body, and the other rotates the rotating body support shaft. An output shaft of the motor to be rotated, and the rotating body support shaft is integrally provided with a rotating body engaging member that engages with the rotating body and rotates integrally with the rotating body, and rotates the rotating body support shaft. A rotation transmission device characterized in that a bearing that supports the rotation is provided. 請求項２記載の回転伝達装置であって、前記モータが減速機構を有さない直接駆動方式のモータであることを特徴とする回転伝達装置。 A rotation transmitting device according to claim 2, the rotation transmission device, wherein the motor is a motor of a direct drive system without a speed reduction mechanism. 請求項２又は３記載の回転伝達装置を設けた画像形成装置であって、画像形成に用いる回転体とそれを駆動するモータとの間に前記回転伝達装置を設けたことを特徴とする画像形成装置。 An image forming apparatus provided with the rotation transmission device according to claim 2 , wherein the rotation transmission device is provided between a rotating body used for image formation and a motor for driving the rotation body. apparatus. 請求項４記載の画像形成装置であって、前記回転体がドラム状の感光体であることを特徴とする画像形成装置。   5. The image forming apparatus according to claim 4, wherein the rotating body is a drum-shaped photoconductor.
JP2004326906A 2004-11-10 2004-11-10 Shaft coupling device, rotation transmission device, and image forming apparatus Expired - Fee Related JP4515226B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004326906A JP4515226B2 (en) 2004-11-10 2004-11-10 Shaft coupling device, rotation transmission device, and image forming apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004326906A JP4515226B2 (en) 2004-11-10 2004-11-10 Shaft coupling device, rotation transmission device, and image forming apparatus

Publications (2)

Publication Number Publication Date
JP2006138356A JP2006138356A (en) 2006-06-01
JP4515226B2 true JP4515226B2 (en) 2010-07-28

Family

ID=36619313

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004326906A Expired - Fee Related JP4515226B2 (en) 2004-11-10 2004-11-10 Shaft coupling device, rotation transmission device, and image forming apparatus

Country Status (1)

Country Link
JP (1) JP4515226B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7303516B1 (en) 2022-03-01 2023-07-05 株式会社エムズ double wrench

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5609312B2 (en) * 2010-06-25 2014-10-22 富士ゼロックス株式会社 Image forming apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01288622A (en) * 1988-05-12 1989-11-20 Fuji Xerox Co Ltd Shaft coupling
JPH09281849A (en) * 1996-04-12 1997-10-31 Ricoh Co Ltd Photoreceptor supporting structure
JP2004279641A (en) * 2003-03-14 2004-10-07 Ricoh Co Ltd Image forming apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01288622A (en) * 1988-05-12 1989-11-20 Fuji Xerox Co Ltd Shaft coupling
JPH09281849A (en) * 1996-04-12 1997-10-31 Ricoh Co Ltd Photoreceptor supporting structure
JP2004279641A (en) * 2003-03-14 2004-10-07 Ricoh Co Ltd Image forming apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7303516B1 (en) 2022-03-01 2023-07-05 株式会社エムズ double wrench
JP2023127271A (en) * 2022-03-01 2023-09-13 株式会社エムズ double wrench

Also Published As

Publication number Publication date
JP2006138356A (en) 2006-06-01

Similar Documents

Publication Publication Date Title
JP4758247B2 (en) Drive transmission mechanism and image forming apparatus having the same
US7401555B2 (en) Device for and method of coupling shafts, image formation apparatus, process cartridge, and belt unit
US6661986B2 (en) Image forming apparatus and driving apparatus for image forming means used in the image forming apparatus
US9772599B2 (en) Driving force transmission unit and image forming apparatus including same
US6438341B1 (en) Drive transmission for photosensitive drum with first and second engaging members, and urging means for engaging the first and second engaging members
JP2014044276A (en) Drive transmission apparatus and image forming device
US7702258B2 (en) Color image forming apparatus with color registration compensation unit
JPH11344905A (en) Image formation unit and image forming device using it
JP2005069239A (en) Transmission, photoreceptor drum, process cartridge and image forming device
JP4515226B2 (en) Shaft coupling device, rotation transmission device, and image forming apparatus
JP2005076777A (en) Shaft connecting device, image forming device, process cartridge mounted in the same, and connecting method of belt unit and shaft
JP7476034B2 (en) Driving force transmission mechanism and image forming apparatus
JP2001100476A (en) Drive connection device and image forming device using it
US11479425B2 (en) One-way clutch, sheet conveying apparatus, and image forming apparatus
JP4346480B2 (en) Rotation transmission device and image forming apparatus having the same
JP3492100B2 (en) Image forming device
JP4810186B2 (en) Image forming apparatus, color image forming apparatus
JP2002130312A (en) Driving-force transfer mechanism, process cartridge and picture-forming device
JPH11303883A (en) Shaft joint, transmission unit for photosensitive drum and image forming device
US11579560B2 (en) Driving force transmission mechanism and image forming apparatus
JPH1152657A (en) Image forming device
JP2004279641A (en) Image forming apparatus
JP3651818B2 (en) Color image forming apparatus
JP3352327B2 (en) Color image forming equipment
JP2006162010A (en) Drive transmitting device and image forming device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20071025

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20090623

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20090625

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20090824

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100511

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100512

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130521

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140521

Year of fee payment: 4

LAPS Cancellation because of no payment of annual fees