JP2002341658A - Developing device, image forming device and shaft coupling - Google Patents
Developing device, image forming device and shaft couplingInfo
- Publication number
- JP2002341658A JP2002341658A JP2001143519A JP2001143519A JP2002341658A JP 2002341658 A JP2002341658 A JP 2002341658A JP 2001143519 A JP2001143519 A JP 2001143519A JP 2001143519 A JP2001143519 A JP 2001143519A JP 2002341658 A JP2002341658 A JP 2002341658A
- Authority
- JP
- Japan
- Prior art keywords
- shaft
- drive
- power transmission
- transmission shaft
- drive shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Dry Development In Electrophotography (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、複写機、プリン
ター、ファクシミリ等の画像形成装置及びこの画像形成
装置の感光体の静電潜像をトナー像として可視化する現
像装置に関し、さらに、画像形成装置の現像装置やその
他の部品と動力側とを接続するために使用される軸継ぎ
手に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a copying machine, a printer, a facsimile, etc., and a developing apparatus for visualizing an electrostatic latent image on a photosensitive member of the image forming apparatus as a toner image. And a shaft coupling used to connect the developing device and other parts to the power side.
【０００２】[0002]
【従来の技術】一般に、現像装置は、モータによって駆
動されるようになっており、画像形成装置本体に組み付
ける際に、モータ側の動力伝達軸に現像ローラを駆動す
るための軸である駆動軸を軸継ぎ手で連結するようにな
っている。2. Description of the Related Art Generally, a developing device is driven by a motor, and a drive shaft for driving a developing roller to a power transmission shaft on the motor side when assembling the developing device with an image forming apparatus main body. Are connected by a shaft coupling.
【０００３】図２２は、従来の軸継ぎ手５０によって動
力伝達軸５１と駆動軸５２を連結する状態を説明する図
である。この図に示すように、従来の現像装置は、軸継
ぎ手５０を駆動軸５２の先端に固定してあり、その軸継
ぎ手５０の動力伝達軸５１に対向する面に形成した溝５
３と動力伝達軸５１の駆動ピン５４とを係合することに
より、動力伝達軸５１と駆動軸５２とが軸継ぎ手５０を
介して一体的に回動できるようになっている。FIG. 22 is a view for explaining a state in which a power transmission shaft 51 and a drive shaft 52 are connected by a conventional shaft coupling 50. As shown in this figure, in the conventional developing device, a shaft joint 50 is fixed to the tip of a drive shaft 52, and a groove 5 formed on a surface of the shaft joint 50 facing the power transmission shaft 51.
By engaging the drive pin 3 of the power transmission shaft 51 with the drive pin 3, the power transmission shaft 51 and the drive shaft 52 can be integrally rotated via the shaft joint 50.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、現像装
置を画像形成装置本体に組み付ける際に、必ずしも軸継
ぎ手５０の溝５３と動力伝達軸５１の駆動ピン５４の位
置が合っていない場合がある。このような場合、動力伝
達軸５１は、ギヤ等を介してモータ等に連繋されてお
り、手動で容易に回動させられない。したがって、現像
装置側の駆動軸５２を手動で回動し、軸継ぎ手５０の溝
５３の位置を動力伝達軸５１の駆動ピン５４に係合する
位置に合わせ、軸継ぎ手５０の溝５３と動力伝達軸５１
の駆動ピン５４が係合できるような状態にした後、現像
装置を画像形成装置本体に組み付けるようになってお
り、これらの一連の作業が作業者の勘によるものである
ため、現像装置の組み付け作業に手間がかかり、現像装
置の画像形成装置本体への組み付け作業が容易でなかっ
た。However, when assembling the developing device to the image forming apparatus main body, the position of the groove 53 of the shaft coupling 50 and the position of the drive pin 54 of the power transmission shaft 51 may not always be matched. In such a case, the power transmission shaft 51 is connected to a motor or the like via a gear or the like and cannot be easily rotated manually. Therefore, the drive shaft 52 on the developing device side is manually rotated to adjust the position of the groove 53 of the shaft joint 50 to the position where it is engaged with the drive pin 54 of the power transmission shaft 51, and the power transmission with the groove 53 of the shaft joint 50 is performed. Axis 51
After the drive pins 54 are engaged, the developing device is assembled to the main body of the image forming apparatus. Since a series of these operations is performed by the operator, the assembly of the developing device is performed. The work is troublesome, and the assembling work of the developing device to the image forming apparatus main body is not easy.
【０００５】また、現像装置の画像形成装置本体への組
み付け時に、現像装置の駆動軸５２を回動すると、現像
ローラが回転し、現像装置内のトナーが外部に落下し、
画像形成装置本体内の各部（例えば、転写ローラ）をト
ナーで汚してしまうという問題をも生じる虞がある。When the drive shaft 52 of the developing device is rotated at the time of assembling the developing device to the image forming apparatus main body, the developing roller rotates, and the toner in the developing device falls to the outside.
There is also a possibility that a problem that each part (for example, a transfer roller) in the image forming apparatus main body is stained with toner.
【０００６】そこで、本発明は、動力伝達軸と駆動軸の
連結作業を容易に行える軸継ぎ手を開発し、画像形成装
置本体への組み付け作業が容易になると共にトナーの外
部への落下の虞がない現像装置や、このような現像装置
を備えた画像形成装置を提供することを目的とする。In view of the above, the present invention has developed a shaft joint which can easily connect the power transmission shaft and the drive shaft. This facilitates the operation of assembling the image forming apparatus main body and also reduces the possibility of toner falling outside. It is an object of the present invention to provide a developing device having no developing device and an image forming apparatus having such a developing device.
【０００７】[0007]
【課題を解決するための手段】請求項１の発明に係る現
像装置は、現像ローラの駆動軸を軸継ぎ手で動力伝達軸
に連結し、この動力伝達軸、前記軸継ぎ手及び前記駆動
軸を介して前記現像ローラを回転させ、この回転する現
像ローラによって感光体表面にトナーを供給し、感光体
表面の静電潜像をトナーで可視化するようになってい
る。この発明の現像装置において、前記駆動軸及び前記
動力伝達軸の前記軸継ぎ手側の先端には、それぞれの軸
線に対してほぼ直交する方向へ突出する駆動突起を形成
し、前記軸継ぎ手には、前記駆動軸と前記動力伝達軸の
いずれか一方の駆動突起に所定角度だけ相対回動できる
ように係合する第１係合部と、前記駆動軸と動力伝達軸
のいずれか他方の駆動突起に係合する第２係合部とを形
成してある。そして、前記第１係合部には、前記駆動軸
と前記動力伝達軸のいずれか一方に対して前記軸継ぎ手
を相対回動可能に弾性支持するばねを収容してある。ま
た、前記第２係合部には、前記駆動軸と前記動力伝達軸
のいずれか他方の駆動突起を収容する係合溝と、前記駆
動軸と前記動力伝達軸のいずれか他方の駆動突起を前記
係合溝へ案内する傾斜面と、を形成してある。According to a first aspect of the present invention, there is provided a developing device in which a drive shaft of a developing roller is connected to a power transmission shaft by a shaft joint, and the power transmission shaft, the shaft joint and the drive shaft are connected to each other. Then, the developing roller is rotated, and toner is supplied to the surface of the photoreceptor by the rotating developing roller, so that the electrostatic latent image on the surface of the photoreceptor is visualized with the toner. In the developing device of the present invention, a drive projection is formed at a tip of the drive shaft and the power transmission shaft on a side of the shaft joint, the drive protrusion projecting in a direction substantially orthogonal to each axis. A first engaging portion that engages with one of the drive projections of the drive shaft and the power transmission shaft so as to be relatively rotatable by a predetermined angle; and a drive projection of the other of the drive shaft and the power transmission shaft. A second engaging portion to be engaged is formed. The first engagement portion houses a spring that elastically supports the shaft joint so as to be rotatable relative to one of the drive shaft and the power transmission shaft. The second engagement portion includes an engagement groove for accommodating the other drive projection of the drive shaft and the power transmission shaft, and a drive projection of the other of the drive shaft and the power transmission shaft. And an inclined surface for guiding to the engagement groove.
【０００８】このような構成の本発明によれば、軸継ぎ
手の第１係合部に駆動軸と動力伝達軸のいずれか一方を
係合した後、駆動軸と動力伝達軸のいずれか他方を軸継
ぎ手の第２係合部に押し込むと、駆動軸と動力伝達軸の
いずれか他方の駆動突起が第２係合部の傾斜面に沿って
移動する際に、軸継ぎ手がばねを撓み変形させて回動
し、駆動軸と動力伝達軸のいずれか他方の駆動突起の位
置と第２係合部の係合溝の位置が合致し、その駆動突起
が第２係合部の係合溝に円滑に係合する。その結果、駆
動軸と動力伝達軸の連結時に、現像装置の現像ローラを
回動させてしまうことがなく、トナーが現像装置の外部
に漏れ出るようなことがない。According to the present invention having such a configuration, after engaging one of the drive shaft and the power transmission shaft with the first engagement portion of the shaft joint, the other of the drive shaft and the power transmission shaft is connected to the first engagement portion. When the drive projection of the other of the drive shaft and the power transmission shaft moves along the inclined surface of the second engagement portion, the shaft joint bends and deforms the spring when pushed into the second engagement portion of the shaft joint. And the position of the other drive projection of the drive shaft and the power transmission shaft coincides with the position of the engagement groove of the second engagement portion, and the drive projection is aligned with the engagement groove of the second engagement portion. Engage smoothly. As a result, when the drive shaft and the power transmission shaft are connected, the developing roller of the developing device does not rotate, and the toner does not leak out of the developing device.
【０００９】請求項２の発明に係る画像形成装置は、前
記請求項１の発明に係る現像装置を備え、この現像装置
から供給したトナーによって感光体表面にトナー像を形
成し、その感光体表面のトナー像を転写手段によってシ
ート材に転写することを特徴としている。An image forming apparatus according to a second aspect of the present invention includes the developing device according to the first aspect of the present invention, and forms a toner image on the surface of a photoreceptor with toner supplied from the developing device. Is transferred to a sheet material by a transfer unit.
【００１０】このような構成の本発明によれば、現像装
置の取付作業が容易化すると共に、現像装置の取付作業
時におけるトナーの落下を防止でき、現像装置周辺のト
ナー汚染を効果的に防止できる。According to the present invention having such a configuration, the mounting operation of the developing device is facilitated, and the toner is prevented from dropping during the mounting operation of the developing device, and the toner contamination around the developing device is effectively prevented. it can.
【００１１】請求項３の発明に係る軸継ぎ手は、駆動軸
と動力伝達軸とを連結するようになっており、前記駆動
軸と前記動力伝達軸のいずれか一方の駆動突起に所定角
度だけ相対回動できるように係合する第１係合部と、前
記駆動軸と前記動力伝達軸のいずれか他方の駆動突起に
係合する第２係合部とを備えている。そして、前記第１
係合部には、前記駆動軸と前記動力伝達軸のいずれか一
方の回転駆動方向に前記軸継ぎ手を付勢するばねを収容
してある。また、前記第２係合部には、前記駆動軸と前
記動力伝達軸のいずれか他方の駆動突起を収容する係合
溝と、前記駆動軸と前記動力伝達軸のいずれか他方の駆
動突起を前記係合溝へ案内する傾斜面と、を形成してあ
る。According to a third aspect of the present invention, there is provided a shaft coupling for connecting a drive shaft and a power transmission shaft, wherein the drive shaft and one of the power transmission shafts have a predetermined angle relative to the drive projection. A first engagement portion that is rotatably engaged; and a second engagement portion that is engaged with one of the drive projections of the drive shaft and the power transmission shaft. And the first
The engaging portion houses a spring that biases the shaft joint in a rotational driving direction of one of the drive shaft and the power transmission shaft. The second engagement portion includes an engagement groove for accommodating the other drive projection of the drive shaft and the power transmission shaft, and a drive projection of the other of the drive shaft and the power transmission shaft. And an inclined surface for guiding to the engagement groove.
【００１２】このような構成の本発明によれば、軸継ぎ
手の第１係合部に駆動軸と動力伝達軸のいずれか一方を
係合した後、駆動軸と動力伝達軸のいずれか他方を軸継
ぎ手の第２係合部に押し込むと、駆動軸と動力伝達軸の
いずれか他方の駆動突起が第２係合部の傾斜面に沿って
移動する際に、軸継ぎ手がばねを撓み変形させて回動
し、駆動軸と動力伝達軸のいずれか他方の駆動突起の位
置と第２係合部の係合溝の位置が合致し、その駆動突起
が第２係合部の係合溝に円滑に係合する。したがって、
本発明の軸継ぎ手を使用すれば、モータ等の動力源側の
動力伝達軸と各種装置の駆動軸とを容易に連結すること
が可能になる。According to the present invention having such a configuration, after engaging one of the drive shaft and the power transmission shaft with the first engagement portion of the shaft joint, the other of the drive shaft and the power transmission shaft is connected to the first engagement portion. When the drive projection of the other of the drive shaft and the power transmission shaft moves along the inclined surface of the second engagement portion, the shaft joint bends and deforms the spring when pushed into the second engagement portion of the shaft joint. And the position of the other drive projection of the drive shaft and the power transmission shaft coincides with the position of the engagement groove of the second engagement portion, and the drive projection is aligned with the engagement groove of the second engagement portion. Engage smoothly. Therefore,
By using the shaft coupling of the present invention, it is possible to easily connect a power transmission shaft on a power source side such as a motor to drive shafts of various devices.
【００１３】[0013]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づき説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１４】（軸継ぎ手） ［第１の実施の形態］図１〜図７は、本発明の第１の実
施の形態に係る軸継ぎ手１を示すものである。(Shaft Joint) [First Embodiment] FIGS. 1 to 7 show a shaft joint 1 according to a first embodiment of the present invention.
【００１５】これらの図に示すように、軸継ぎ手１は、
現像装置の駆動軸（現像ローラ軸）２と、図外のモータ
に連繋された動力伝達軸４とを接続するものであり、駆
動軸２に係合する第１係合部５と、動力伝達軸４に係合
する第２係合部６とを有している。As shown in these figures, the shaft coupling 1
A drive shaft (developing roller shaft) 2 of the developing device is connected to a power transmission shaft 4 connected to a motor (not shown), and a first engagement portion 5 that engages with the drive shaft 2 and a power transmission. And a second engaging portion 6 that engages with the shaft 4.
【００１６】駆動軸２の軸継ぎ手１側の先端には、駆動
軸２の軸線Ｌ１に対して略直交する方向へ突出する駆動
ピン（駆動突起）７が取り付けられている。また、動力
伝達軸４の軸継ぎ手１側の先端にも、動力伝達軸４の軸
線Ｌ２に対して略直交する方向へ突出する駆動ピン（駆
動突起）８が取り付けられている。そして、駆動軸４の
駆動ピン７が第１係合部５に係合され、動力伝達軸２の
駆動ピン８が第２係合部６に係合されるようになってい
る。At the end of the drive shaft 2 on the side of the shaft joint 1, a drive pin (drive protrusion) 7 is mounted which projects in a direction substantially perpendicular to the axis L1 of the drive shaft 2. A drive pin (drive protrusion) 8 that projects in a direction substantially orthogonal to the axis L2 of the power transmission shaft 4 is also attached to the end of the power transmission shaft 4 on the shaft joint 1 side. Then, the drive pin 7 of the drive shaft 4 is engaged with the first engagement portion 5, and the drive pin 8 of the power transmission shaft 2 is engaged with the second engagement portion 6.
【００１７】このうち、第１係合部５は、図１，図３，
図５及び図７に示すように、軸継ぎ手１の現像装置側の
側面に形成されており、駆動軸２の先端側部分を収容す
る軸穴１０及び駆動ピン７を係合する略扇形形状の係合
溝１１が駆動軸２の軸芯に対して対称に一対形成されて
いる。この係合溝１１は、駆動軸２と軸継ぎ手１が所定
角度（本実施の形態では１５度であるが、この角度は使
用条件等により適宜決定される）だけ相対回動できるよ
うに、軸穴１０から外周端近傍まで形成されており、半
径方向内方から半径方向外方へ向かうしたがって溝幅が
広がるように形成されている。Among them, the first engaging portion 5 is shown in FIGS.
As shown in FIGS. 5 and 7, the shaft joint 1 is formed on a side surface on the developing device side, and has a substantially fan-shaped shape in which a shaft hole 10 for accommodating a tip side portion of the drive shaft 2 and a drive pin 7 are engaged. A pair of engagement grooves 11 are formed symmetrically with respect to the axis of the drive shaft 2. The engagement groove 11 is provided so that the drive shaft 2 and the shaft joint 1 can be relatively rotated by a predetermined angle (in the present embodiment, 15 degrees, but this angle is appropriately determined according to use conditions and the like). The groove is formed from the hole 10 to the vicinity of the outer peripheral end, and is formed so that the groove width is increased from the inside in the radial direction to the outside in the radial direction.
【００１８】そして、図１０，図１２及び図１３に示す
ように、駆動軸２の駆動ピン７には、軸継ぎ手１を駆動
ピン７に対して駆動方向（図１２の半時計回り方向）に
弾性的に付勢するばね１２が取り付けられている。この
ばね１２は、駆動軸２のばね取付溝１３に巻き付けら
れ、その折り曲げられた一端１２ａが駆動ピン７の係止
穴１４に係合され、その他端１２ｂが係合溝１１の駆動
方向側の壁面１１ａを押圧するようになっている。な
お、このばね１２は、無負荷時における駆動軸２に対す
る軸継ぎ手１の姿勢を保持するものであるため、現像装
置の駆動抵抗に比較してごく小さなばね力のもので足り
る。また、ばね１２は、駆動軸２から突出する駆動ピン
７の両端側のばね取付溝１３，１３にそれぞれ取り付け
られているが、駆動ピン７の少なくとも一端側に取り付
ければよい。As shown in FIG. 10, FIG. 12 and FIG. 13, the drive pin 7 of the drive shaft 2 is provided with the shaft coupling 1 in the drive direction (counterclockwise direction in FIG. 12) with respect to the drive pin 7. An elastically biasing spring 12 is mounted. The spring 12 is wound around a spring mounting groove 13 of the drive shaft 2, and one end 12 a of the spring 12 is engaged with the locking hole 14 of the driving pin 7, and the other end 12 b is located on the driving direction side of the engaging groove 11. The wall 11a is pressed. Since the spring 12 holds the attitude of the shaft coupling 1 with respect to the drive shaft 2 when there is no load, a spring having a very small spring force as compared with the driving resistance of the developing device is sufficient. The springs 12 are respectively mounted on the spring mounting grooves 13 on both ends of the drive pin 7 protruding from the drive shaft 2, but may be mounted on at least one end of the drive pin 7.
【００１９】ここで、駆動軸２は、図８（ａ）の側面図
及び図８（ｂ）の正面図に示すように、その先端側に駆
動ピン嵌合穴１５が半径方向へ貫通形成されている。そ
して、この駆動ピン嵌合穴１５には、駆動ピン７の両端
が駆動軸２の外部に対称に突出するように圧入されてい
る。また、この駆動軸２の先端には、図８，図５及び図
１０に示すように、軸穴１０に形成された突起１０ａに
係合する抜け止め溝９が形成されている。したがって、
駆動軸２を軸継ぎ手１の軸穴１０内の所定位置まで押し
込むと、抜け止め溝９と突起１０ａとが係合し、軸継ぎ
手１が駆動軸２から簡単に抜けることがない。As shown in the side view of FIG. 8 (a) and the front view of FIG. 8 (b), the drive shaft 2 has a drive pin fitting hole 15 formed in the distal end thereof in a radial direction. ing. The drive pin 7 is press-fitted into the drive pin fitting hole 15 such that both ends of the drive pin 7 project symmetrically outside the drive shaft 2. As shown in FIGS. 8, 5, and 10, a stopper groove 9 that engages with a projection 10a formed in the shaft hole 10 is formed at the tip of the drive shaft 2. Therefore,
When the drive shaft 2 is pushed to a predetermined position in the shaft hole 10 of the shaft joint 1, the retaining groove 9 and the projection 10 a engage, and the shaft joint 1 does not easily come off the drive shaft 2.
【００２０】また、第２係合部６は、図６，図１０及び
図１１に示すように、軸継ぎ手１の動力伝達軸側の側面
に形成されており、動力伝達軸４の先端側部分及び駆動
ピン（駆動突起）８を収容する係合溝１６と、この係合
溝１６に動力伝達軸４の駆動ピン８を円滑に案内する傾
斜面１７とを備えている。このうち、係合溝１６は、図
６及び図１１に示すように、駆動ピン８に僅かな隙間を
もって係合し、動力伝達軸４が回動すると駆動ピン８に
当接するドライブ面１８と、駆動ピン８に十分な隙間を
もって係合し、動力伝達軸４の先端側部分を収容するた
めのスペースを確保する動力伝達軸受容面２０とを備え
ており、軸継ぎ手１の回転中心の回りに９０度間隔で放
射状に４箇所形成されている。The second engaging portion 6 is formed on the side of the shaft coupling 1 on the power transmission shaft side, as shown in FIGS. An engagement groove 16 for accommodating the drive pin (drive protrusion) 8 and an inclined surface 17 for smoothly guiding the drive pin 8 of the power transmission shaft 4 in the engagement groove 16 are provided. 6 and 11, the engagement groove 16 engages with the drive pin 8 with a small gap, and the drive surface 18 that contacts the drive pin 8 when the power transmission shaft 4 rotates. A power transmission shaft receiving surface 20 which engages with the drive pin 8 with a sufficient clearance and secures a space for accommodating the front end portion of the power transmission shaft 4, and around the rotation center of the shaft coupling 1. Four locations are formed radially at 90 degree intervals.
【００２１】そして、図５及び図１０に示すように、軸
継ぎ手１の動力伝達軸側の側面が、ドライブ面１８の端
縁近傍１８ａから内部に向かって斜めに切り下げられ
て、上記傾斜面１７が形成されるようになっている。な
お、ドライブ面１８の端縁近傍がＲ面取りされ、駆動ピ
ン８が円滑に係合溝１６に係合されるように工夫されて
いる。また、傾斜面１７の傾斜角度α１は、動力伝達軸
４の駆動ピン８を係合溝１６側に円滑に案内できる程度
の角度であればよく、本実施の形態においては２５度と
しているが、これに限られるものではない。As shown in FIGS. 5 and 10, the side surface of the shaft coupling 1 on the power transmission shaft side is cut obliquely from the vicinity of the end edge 18a of the drive surface 18 toward the inside, and the inclined surface 17 is formed. Is formed. In addition, the vicinity of the edge of the drive surface 18 is chamfered so that the drive pin 8 is smoothly engaged with the engagement groove 16. Further, the inclination angle α1 of the inclined surface 17 may be an angle that can smoothly guide the drive pin 8 of the power transmission shaft 4 to the engagement groove 16 side, and is set to 25 degrees in the present embodiment. However, it is not limited to this.
【００２２】なお、動力伝達軸４は、図９（ａ）の正面
図及び図９（ｂ）の側面図に示すように、その先端側に
駆動ピン嵌合穴２１が半径方向へ貫通形成されている。
そして、この駆動ピン嵌合穴２１には、駆動ピン８の両
端が動力伝達軸４の外部に対称に突出するように圧入さ
れている。As shown in the front view of FIG. 9 (a) and the side view of FIG. 9 (b), the power transmission shaft 4 has a drive pin fitting hole 21 formed in the distal end thereof in a radial direction. ing.
The drive pin 8 is press-fitted into the drive pin fitting hole 21 so that both ends of the drive pin 8 project symmetrically outside the power transmission shaft 4.
【００２３】このような構成の軸継ぎ手１は、先ず、図
１，図２，図１０，図１２及び図１３に示すように、現
像装置側の駆動軸２及びこの駆動軸２の駆動ピン７に第
１係合部５を係合する。すなわち、軸継ぎ手１は、先ず
現像装置側に取り付けられる。この際、軸継ぎ手１は、
第１係合部５に収容されたばね１２により駆動軸２の駆
動ピン７に対して駆動方向（駆動軸の回転方向）へ付勢
され、駆動ピン７が係合溝１１の壁面１１ｂに当接し、
軸継ぎ手１が駆動ピン７に対して弾性的に支持される。
その結果、軸継ぎ手１は、ばね１２を撓み変形させて駆
動方向と反対の方向へ回動できるようになっている。As shown in FIGS. 1, 2, 10, 12 and 13, the shaft coupling 1 having the above-described structure first includes a drive shaft 2 on the developing device side and a drive pin 7 of the drive shaft 2. To the first engaging portion 5. That is, the shaft coupling 1 is first attached to the developing device side. At this time, the shaft coupling 1
The spring 12 housed in the first engagement portion 5 urges the drive pin 7 of the drive shaft 2 in the drive direction (the direction of rotation of the drive shaft) so that the drive pin 7 contacts the wall surface 11 b of the engagement groove 11. ,
The shaft coupling 1 is elastically supported by the drive pin 7.
As a result, the shaft coupling 1 can bend in the direction opposite to the driving direction by bending and deforming the spring 12.
【００２４】次いで、このように現像装置に取り付けら
れた軸継ぎ手１の第２係合部６と動力伝達軸４及び駆動
ピン８とを係合する。この際、図１４及び図１６に示す
ように、駆動ピン８と係合溝１６とが係合せず、駆動ピ
ン８が傾斜面１７上に位置している場合には、動力伝達
軸４及び駆動ピン８を第２係合部６に押し込むと、軸継
ぎ手１が駆動方向と反対の方向へばね１２を撓み変形さ
せて回動するとともに、駆動ピン８が傾斜面１７を滑っ
て係合溝１６へ案内される（図１５参照）。これによ
り、駆動ピン８が第２係合部６の係合溝１６に係合され
ることになる。なお、動力伝達軸４の駆動ピン８と第２
係合部６の係合溝１６の位置が合致する場合には、当然
のことながら、動力伝達軸４を第２係合部６に押し込め
ば、駆動ピン８が係合溝１６に係合されることになる。Next, the second engaging portion 6 of the shaft coupling 1 thus attached to the developing device is engaged with the power transmission shaft 4 and the driving pin 8. At this time, as shown in FIGS. 14 and 16, when the drive pin 8 is not engaged with the engagement groove 16 and the drive pin 8 is located on the inclined surface 17, the power transmission shaft 4 and the drive When the pin 8 is pushed into the second engaging portion 6, the shaft joint 1 rotates by bending the spring 12 in a direction opposite to the driving direction, and the driving pin 8 slides on the inclined surface 17 to engage the engaging groove 16. (See FIG. 15). Thereby, the drive pin 8 is engaged with the engagement groove 16 of the second engagement portion 6. The drive pin 8 of the power transmission shaft 4 and the second
When the position of the engaging groove 16 of the engaging portion 6 matches, the driving pin 8 is naturally engaged with the engaging groove 16 by pushing the power transmission shaft 4 into the second engaging portion 6. Will be.
【００２５】この状態において、図外のモータが駆動さ
れて動力伝達軸４が回動すると、動力伝達軸４の駆動ピ
ン８が第２係合部６の係合溝１６のドライブ面１８に当
接し、動力伝達軸４と軸継ぎ手１とが一体となって回動
できるようになり、動力が動力伝達軸４から軸継ぎ手１
に伝達される。そして、駆動軸２の駆動ピン７が第１係
合部５の係合溝１１の駆動方向側の壁面１１ａに当接
し、動力伝達軸４，軸継ぎ手１及び駆動軸２が一体とな
って回動し、駆動力が動力伝達軸４，軸継ぎ手１，駆動
軸２及び現像装置へと伝達される。In this state, when a motor (not shown) is driven to rotate the power transmission shaft 4, the drive pin 8 of the power transmission shaft 4 comes into contact with the drive surface 18 of the engagement groove 16 of the second engagement portion 6. The power transmission shaft 4 and the shaft coupling 1 can rotate integrally with each other, so that power is transmitted from the power transmission shaft 4 to the shaft coupling 1.
Is transmitted to Then, the drive pin 7 of the drive shaft 2 abuts on the drive direction side wall surface 11a of the engagement groove 11 of the first engagement portion 5, and the power transmission shaft 4, the shaft joint 1 and the drive shaft 2 are integrally turned. The driving force is transmitted to the power transmission shaft 4, the shaft coupling 1, the drive shaft 2, and the developing device.
【００２６】以上のように、本実施の形態は、現像装置
側の駆動軸２に取り付けられた軸継ぎ手１に動力伝達軸
４を係合する際に、動力伝達軸４の駆動ピン８の位置と
第２係合部６の係合溝１６の位置とが合致していない場
合でも、動力伝達軸４及び駆動ピン８を第２係合部６に
押し込むと、駆動ピン８が傾斜面１７に沿って滑り、軸
継ぎ手１が駆動方向と反対の方向へばね１２を撓み変形
させて回動すると共に、駆動ピン８が傾斜面１７に案内
されて第２係合部６の係合溝１６に円滑に係合するよう
になっているため、現像装置の駆動軸２と動力伝達軸４
との連結作業が容易化する。これに対し、従来は、動力
伝達軸の駆動ピンに軸継ぎ手の係合溝の位置を合わせる
ために、作業者が自らの勘に基づいて現像装置側の駆動
軸を無理遣り回動させていたため、駆動軸と動力伝達軸
の連結作業が容易でなかった。As described above, according to the present embodiment, when the power transmission shaft 4 is engaged with the shaft joint 1 attached to the drive shaft 2 on the developing device side, the position of the drive pin 8 of the power transmission shaft 4 is changed. When the power transmission shaft 4 and the drive pin 8 are pushed into the second engagement portion 6 even when the position of the engagement groove 16 of the second engagement portion 6 Along with the shaft joint 1, the spring 12 bends and deforms in a direction opposite to the driving direction to rotate, and the driving pin 8 is guided by the inclined surface 17 to be engaged with the engaging groove 16 of the second engaging portion 6. Because of the smooth engagement, the drive shaft 2 of the developing device and the power transmission shaft 4
Connection work with is facilitated. On the other hand, conventionally, in order to align the engagement groove of the shaft coupling with the drive pin of the power transmission shaft, the operator forcibly rotates the drive shaft of the developing device based on his / her intuition. However, the connection between the drive shaft and the power transmission shaft was not easy.
【００２７】また、本実施の形態は、上述のように、現
像装置の駆動軸２と動力伝達軸４とを連結する際に、軸
継ぎ手１が回動することにより、現像装置の駆動軸２と
動力伝達軸４との連結が容易に行われるようになってい
るため、現像装置の駆動軸２を駆動方向と反対の方向へ
無理遣り回動させるようなことがない。したがって、本
実施の形態によれば、現像装置の現像ローラが逆方向に
回動することに起因するトナー漏れや、このトナー漏れ
に起因する転写ローラやシート搬送路等の汚染がない。In this embodiment, as described above, when the drive shaft 2 of the developing device and the power transmission shaft 4 are connected to each other, the shaft joint 1 rotates so that the drive shaft 2 of the developing device is rotated. And the power transmission shaft 4 are easily connected, so that the drive shaft 2 of the developing device is not forced to rotate in the direction opposite to the driving direction. Therefore, according to the present embodiment, there is no toner leakage due to the rotation of the developing roller of the developing device in the reverse direction, and no contamination of the transfer roller and the sheet conveying path due to the toner leakage.
【００２８】（画像形成装置）図２１は、上述の実施の
形態に係る軸継ぎ手１を使用した現像装置２２を構成要
素として備えた画像形成装置２３の概略構成図である。(Image Forming Apparatus) FIG. 21 is a schematic structural view of an image forming apparatus 23 having a developing device 22 using the shaft coupling 1 according to the above-described embodiment as a component.
【００２９】この図に示すように、画像形成装置２３
は、周囲に感光層を有する感光体２４の回りに、感光体
２４の感光層を特定極性に帯電させる帯電器２５と、感
光体２４の感光層に静電潜像を形成する光学ユニット２
６と、感光体２４の静電潜像をトナー像に現像する現像
装置２２と、感光体２４の表面のトナー像を記録媒体と
してのシート材に転写させる転写ローラ（転写手段）２
７と、転写後の感光体２４の表面から残留トナーを除去
するトナー除去装置２７と、が少なくとも配置されてい
る。As shown in this figure, the image forming apparatus 23
A charger 25 for charging the photosensitive layer of the photoconductor 24 to a specific polarity around a photoconductor 24 having a photosensitive layer around the optical unit 24; and an optical unit 2 for forming an electrostatic latent image on the photosensitive layer of the photoconductor 24.
6, a developing device 22 for developing the electrostatic latent image on the photoconductor 24 into a toner image, and a transfer roller (transfer unit) 2 for transferring the toner image on the surface of the photoconductor 24 to a sheet material as a recording medium
7 and at least a toner removing device 27 that removes residual toner from the surface of the photoconductor 24 after transfer.
【００３０】そして、この画像形成装置２３において、
シート給送装置３０から送り出されたシート材（紙、プ
ラスチックシート等）３１は、搬送ローラ３２により感
光体２４と転写ローラ２７とのニップ部に送り込まれ
て、転写ローラ２７により感光体２４のトナー像が転写
され、定着手段としての定着ローラ３３によりトナー像
が定着され、その後、排紙ローラ３４によってトレイ３
５上に排出されるようになっている。Then, in this image forming apparatus 23,
The sheet material (paper, plastic sheet, etc.) 31 sent out from the sheet feeding device 30 is sent to the nip portion between the photoconductor 24 and the transfer roller 27 by the conveyance roller 32, and the toner of the photoconductor 24 is transferred by the transfer roller 27. The image is transferred, and the toner image is fixed by a fixing roller 33 as a fixing unit.
5 to be discharged.
【００３１】ここで、現像装置２２は、現像ローラ３６
の駆動軸２が上述の実施の形態に係る軸継ぎ手１で動力
伝達軸４に連結されるようになっている（図３，図４及
び図１０参照）。なお、動力伝達軸４は、予め画像形成
装置本体２３ａに回動できるように組み付けられてお
り、感光体２４等を駆動するモータ３７に連繋されてい
る。したがって、現像装置２２を画像形成装置本体２３
ａに組み付ける際に、現像装置２２の駆動軸２を軸継ぎ
手１を介してモータ３７側の動力伝達軸４に容易に連結
することができる。そして、現像装置２２は、モータ３
７の駆動力が動力伝達軸４、軸継ぎ手１及び駆動軸２を
介して現像ローラ３６に伝達され、現像ローラ３６が伝
達された駆動力によって回動してトナーを感光体２４の
表面に供給する。Here, the developing device 22 includes a developing roller 36
The drive shaft 2 is connected to the power transmission shaft 4 by the shaft coupling 1 according to the above-described embodiment (see FIGS. 3, 4 and 10). The power transmission shaft 4 is preliminarily rotatably assembled to the image forming apparatus main body 23a, and is connected to a motor 37 that drives the photoconductor 24 and the like. Therefore, the developing device 22 is connected to the image forming device main body 23.
When assembling the drive shaft a, the drive shaft 2 of the developing device 22 can be easily connected to the power transmission shaft 4 of the motor 37 via the shaft joint 1. The developing device 22 includes the motor 3
7 is transmitted to the developing roller 36 via the power transmission shaft 4, the shaft joint 1 and the driving shaft 2, and the developing roller 36 is rotated by the transmitted driving force to supply toner to the surface of the photoconductor 24. I do.
【００３２】以上のように、上述の実施の形態の軸継ぎ
手１を備えた現像装置２２は、画像形成装置本体２３ａ
への組み付け作業が容易化する。その結果、このような
実施の形態に係る現像装置２２を備えた画像形成装置２
３は、組立工数を従来例に比較して格段に削減すること
ができる。とりわけ、感光体２４が複数配置されるタン
デム形式のカラー複写機やカラープリンタ等において、
より一層組立工数を削減する効果が大きくなる。また、
感光体２４、現像装置２２、トナー除去装置２８、帯電
器等２５を作像ユニットとしてまとめ、その作像ユニッ
トを画像形成装置本体２３ａに着脱可能に取り付けるよ
うに構成された画像形成装置２３においては、作像ユニ
ットの着脱作業が容易且つ確実化する。As described above, the developing device 22 provided with the shaft coupling 1 according to the above-described embodiment is the same as the image forming apparatus main body 23a.
This facilitates the work of assembling. As a result, the image forming apparatus 2 including the developing device 22 according to the embodiment as described above.
3 can significantly reduce the number of assembling steps as compared with the conventional example. In particular, in a tandem-type color copying machine or a color printer in which a plurality of photoconductors 24 are arranged,
The effect of further reducing the number of assembly steps is increased. Also,
In the image forming apparatus 23 configured such that the photoreceptor 24, the developing device 22, the toner removing device 28, and the charger 25 are combined as an image forming unit, and the image forming unit is detachably attached to the image forming apparatus main body 23a. In addition, the work of attaching and detaching the image forming unit is easy and reliable.
【００３３】［本実施の形態の変形例］図１７及び図１
８は、本発明の実施の形態の第１の変形例を示すもので
ある。これらの図に示すように、第１の変形例は、駆動
軸２の駆動ピン７の両端にそれぞればね３８ａ，３８ｂ
を取り付け、そのばね３８ａ，３８ｂの端部を軸継ぎ手
１の係合溝１１の一方の壁面１１ａと他方の壁面１１ｂ
にそれぞれ接触させ、軸継ぎ手１をばね３８ａ，３８ｂ
によって弾性的支持し、軸継ぎ手１が正逆両方向（駆動
方向及び駆動方向と反対の方向）へ回動できるようにな
っている。このようにすれば、現像装置の駆動軸２と動
力伝達軸４との連結時に、軸継ぎ手１が正逆両方向に容
易に回動するため、動力伝達軸４の駆動ピン８と軸継ぎ
手１の係合溝１６の係合作業が一層容易化する。[Modification of this Embodiment] FIGS. 17 and 1
FIG. 8 shows a first modification of the embodiment of the present invention. As shown in these figures, the first modified example has springs 38a and 38b at both ends of the drive pin 7 of the drive shaft 2, respectively.
And the ends of the springs 38a and 38b are connected to one wall surface 11a and the other wall surface 11b of the engagement groove 11 of the shaft coupling 1.
, Respectively, and connect the shaft coupling 1 with the springs 38a, 38b.
Thus, the shaft joint 1 can rotate in both forward and reverse directions (the driving direction and the direction opposite to the driving direction). With this configuration, when the drive shaft 2 of the developing device is connected to the power transmission shaft 4, the shaft joint 1 easily rotates in both the forward and reverse directions, so that the drive pin 8 of the power transmission shaft 4 and the shaft connection 1 The engagement operation of the engagement groove 16 is further facilitated.
【００３４】また、図１９及び図２０は、本発明の実施
の形態の第２の変形例を示すものである。これらの図に
示すように、第２の変形例は、傾斜面１７の最大傾斜方
向がＰ１点を基準として中心線Ｌ３に対して角度θだけ
傾いて形成されており、傾斜面１７の傾斜角度α２がＰ
２点において係合溝１６の溝深さにほぼ合致するような
傾斜角度になっている。なお、Ｐ２点は、係合溝１６の
動力伝達軸受容面２０と軸継ぎ手内周面１ａとの交点で
ある。また、本実施の形態において、角度θ及びα２
は、動力伝達軸４の駆動ピン８を係合溝１６に円滑に案
内できるような角度であればよい。FIGS. 19 and 20 show a second modification of the embodiment of the present invention. As shown in these figures, in the second modification, the maximum inclination direction of the inclined surface 17 is formed to be inclined by an angle θ with respect to the center line L3 with reference to the point P1, and the inclination angle of the inclined surface 17 is α2 is P
At two points, the angle of inclination is such that it substantially matches the groove depth of the engagement groove 16. The point P2 is an intersection between the power transmission shaft receiving surface 20 of the engagement groove 16 and the shaft coupling inner peripheral surface 1a. In the present embodiment, the angles θ and α2
May be any angle that allows the drive pin 8 of the power transmission shaft 4 to be smoothly guided into the engagement groove 16.
【００３５】なお、上述の実施の形態において、予め軸
継ぎ手１の第１係合部５を現像装置の駆動軸２に係合さ
せておき、その駆動軸２に係合させた軸継ぎ手１の第２
係合部６に動力伝達軸４を係合させるようになっている
が、これに限られず、軸継ぎ手１の第１係合部５を動力
伝達軸４に係合させた後、現像装置の駆動軸２を軸継ぎ
手１の第２係合部６に係合させるようにしてもよい。こ
の場合、ばね１２は、動力伝達軸４の駆動ピン８に取り
付けられる。In the above-described embodiment, the first engaging portion 5 of the shaft coupling 1 is previously engaged with the drive shaft 2 of the developing device, and the shaft coupling 1 engaged with the drive shaft 2 is Second
The power transmission shaft 4 is engaged with the engagement portion 6, but is not limited to this. After the first engagement portion 5 of the shaft coupling 1 is engaged with the power transmission shaft 4, the The drive shaft 2 may be engaged with the second engagement portion 6 of the shaft coupling 1. In this case, the spring 12 is attached to the drive pin 8 of the power transmission shaft 4.
【００３６】また、上述の実施の形態において、軸継ぎ
手１の各係合溝１１，１６の溝深さは、軸継ぎ手１と駆
動軸２とが安定した係合状態を維持でき、又、軸継ぎ手
１と動力伝達軸４が安定した係合状態を維持できる程度
の深さに形成されている。In the above-described embodiment, the depth of each of the engagement grooves 11 and 16 of the shaft coupling 1 can maintain the stable engagement between the shaft coupling 1 and the drive shaft 2. The joint 1 and the power transmission shaft 4 are formed to such a depth that a stable engagement state can be maintained.
【００３７】また、上述の軸継ぎ手１は、現像装置２２
に使用される態様が例示されているが、これに限られ
ず、モータ３７に連繋された動力伝達軸又はモータ３７
の出力軸と感光体２４の駆動軸とを連結したり、モータ
３７に連繋された動力伝達軸と転写ローラ２７の駆動軸
とを連結するようにしてもよく、その他の様々な回動部
品とモータ３７側とを連結するために広く適用できる。The above-mentioned shaft coupling 1 is provided with a developing device 22.
The power transmission shaft or the motor 37 connected to the motor 37 is not limited to this.
May be connected to the drive shaft of the photosensitive member 24, or the power transmission shaft connected to the motor 37 may be connected to the drive shaft of the transfer roller 27. It can be widely applied to connect with the motor 37 side.
【００３８】また、上述の軸継ぎ手１は、画像形成装置
２３の各回動部品に広く使用できることはもちろんのこ
と、自動車部品、各種精密機器、各種電気機器等の動力
伝達部品として広く使用することができる。The above-described shaft coupling 1 can be widely used not only for rotating parts of the image forming apparatus 23 but also for power transmission parts of automobile parts, various precision devices, various electric devices and the like. it can.
【００３９】[0039]
【発明の効果】以上のように本発明は、軸継ぎ手の第１
係合部に駆動軸と動力伝達軸のいずれか一方の駆動突起
を係合した後、軸継ぎ手の第２係合部に駆動軸と動力伝
達軸のいずれか他方の駆動突起を係合する際に、駆動軸
と動力伝達軸のいずれか他方の駆動突起を第２係合部に
押し込むと、その駆動突起が第２係合部の傾斜面に沿っ
て滑り、軸継ぎ手が第１係合部に収容されたばねを撓み
変形させて回動すると共に、その駆動突起が傾斜面に案
内されて第２係合部の係合溝内に円滑に移動するため、
駆動軸と動力伝達軸との連結作業が容易化する。As described above, the present invention relates to the first joint of the shaft.
When engaging one of the drive projections of the drive shaft and the power transmission shaft with the engagement portion, and then engaging the other drive projection of the drive shaft and the power transmission shaft with the second engagement portion of the shaft joint When the other drive protrusion of the drive shaft or the power transmission shaft is pushed into the second engagement portion, the drive protrusion slides along the inclined surface of the second engagement portion, and the shaft joint is moved to the first engagement portion. The spring accommodated in the second member is bent and rotated, and the driving projection is guided by the inclined surface to smoothly move into the engagement groove of the second engagement portion.
The connection work between the drive shaft and the power transmission shaft is facilitated.
【図１】駆動軸に係合した軸継ぎ手と動力伝達軸の係合
前の状態を示す第１の斜視図である。FIG. 1 is a first perspective view showing a state before engagement between a shaft coupling engaged with a drive shaft and a power transmission shaft.
【図２】駆動軸に係合した軸継ぎ手と動力伝達軸の係合
前の状態を示す第２の斜視図である。FIG. 2 is a second perspective view showing a state before engagement between a shaft coupling engaged with a drive shaft and a power transmission shaft.
【図３】駆動軸と動力伝達軸を軸継ぎ手で連結した状態
を示す第１の斜視図である。FIG. 3 is a first perspective view showing a state where a drive shaft and a power transmission shaft are connected by a shaft joint.
【図４】駆動軸と動力伝達軸を軸継ぎ手で連結した状態
を示す第２の斜視図である。FIG. 4 is a second perspective view showing a state in which the drive shaft and the power transmission shaft are connected by a shaft joint.
【図５】軸継ぎ手の縦断面図（図６のＡ−Ａ線に沿って
切断して示す断面図）である。5 is a longitudinal sectional view (a sectional view cut along the line AA in FIG. 6) of the shaft coupling;
【図６】図５のＸ１方向から見た軸継ぎ手の側面図であ
る。FIG. 6 is a side view of the shaft coupling as viewed from a direction X1 in FIG. 5;
【図７】図５のＹ１方向から見た軸継ぎ手の側面図であ
る。FIG. 7 is a side view of the shaft coupling as viewed from the Y1 direction in FIG. 5;
【図８】駆動軸の先端部を示す図である。FIG. 8 is a diagram showing a distal end portion of a drive shaft.
【図９】動力伝達軸の先端部を示す図である。FIG. 9 is a diagram showing a distal end portion of a power transmission shaft.
【図１０】駆動軸と動力伝達軸が係合された軸継ぎ手の
縦断面図（図１１のＢ−Ｂ線に沿って切断して示す断面
図）である。10 is a longitudinal sectional view (a sectional view cut along line BB of FIG. 11) of a shaft joint in which a drive shaft and a power transmission shaft are engaged.
【図１１】図１０のＸ２方向から見た図である。FIG. 11 is a diagram viewed from the X2 direction in FIG. 10;
【図１２】図１１のＹ２方向から見た図である。FIG. 12 is a view as seen from a Y2 direction in FIG. 11;
【図１３】図１２のＣ−Ｃ線に沿って切断して示す断面
図である。13 is a cross-sectional view taken along the line CC of FIG.
【図１４】軸継ぎ手と動力伝達軸との係合状態を示す第
１の状態図である。FIG. 14 is a first state diagram showing an engaged state between a shaft coupling and a power transmission shaft.
【図１５】軸継ぎ手と動力伝達軸との係合状態を示す第
２の状態図である。FIG. 15 is a second state diagram showing an engaged state between the shaft coupling and the power transmission shaft.
【図１６】図１４のＤ−Ｄ線に沿って切断して示す断面
図である。FIG. 16 is a sectional view taken along line DD of FIG. 14;
【図１７】本発明の第１変形例を示す軸継ぎ手の第１係
合部側の側面図である。FIG. 17 is a side view of a first engagement portion side of a shaft joint showing a first modified example of the present invention.
【図１８】図１７のＥ−Ｅ線に沿って切断して示す断面
図である。FIG. 18 is a sectional view taken along line EE in FIG. 17;
【図１９】本発明の第２変形例を示す軸継ぎ手の第２係
合部側の側面図である。FIG. 19 is a side view of a second joint portion side of a shaft joint according to a second modified example of the present invention.
【図２０】図１９のＦ−Ｆ線に沿って切断して示す断面
図である。20 is a sectional view taken along line FF of FIG. 19;
【図２１】画像形成装置の概略構成図である。FIG. 21 is a schematic configuration diagram of an image forming apparatus.
【図２２】従来の軸継ぎ手に動力伝達軸を係合する状態
を示す図である。FIG. 22 is a diagram showing a state where a power transmission shaft is engaged with a conventional shaft coupling.
１……軸継ぎ手、２……駆動軸、４……動力伝達軸、５
……第１係合部、６……第２係合部、７，８……駆動ピ
ン（駆動突起）、１２……ばね、１６……係合溝、１７
……傾斜面、２２……現像装置、２３……画像形成装
置、２４……感光体、２７……転写ローラ（転写手
段）、３１……シート材、３６……現像ローラ1 ... shaft coupling, 2 ... drive shaft, 4 ... power transmission shaft, 5
... 1st engaging portion, 6... 2nd engaging portion, 7 and 8... Drive pin (drive protrusion), 12... Spring, 16.
... Inclined surface, 22 developing device, 23 image forming device, 24 photoconductor, 27 transfer roller (transfer unit), 31 sheet material, 36 developing roller
Claims (3)
達軸に連結し、この動力伝達軸、前記軸継ぎ手及び前記
駆動軸を介して前記現像ローラを回転させ、この回転す
る現像ローラによって感光体表面にトナーを供給し、感
光体表面の静電潜像をトナーで可視化する現像装置にお
いて、 前記駆動軸及び前記動力伝達軸の前記軸継ぎ手側の先端
には、それぞれの軸線に対してほぼ直交する方向へ突出
する駆動突起を形成し、 前記軸継ぎ手には、前記駆動軸と前記動力伝達軸のいず
れか一方の駆動突起に所定角度だけ相対回動できるよう
に係合する第１係合部と、前記駆動軸と動力伝達軸のい
ずれか他方の駆動突起に係合する第２係合部とを形成
し、 前記第１係合部には、前記駆動軸と前記動力伝達軸のい
ずれか一方に対して前記軸継ぎ手を相対回動可能に弾性
支持するばねを収容し、 前記第２係合部には、前記駆動軸と前記動力伝達軸のい
ずれか他方の駆動突起を収容する係合溝と、前記駆動軸
と前記動力伝達軸のいずれか他方の駆動突起を前記係合
溝へ案内する傾斜面と、を形成したことを特徴とする現
像装置。A drive shaft of a developing roller is connected to a power transmission shaft by a shaft coupling, and the developing roller is rotated through the power transmission shaft, the shaft coupling and the drive shaft, and the photosensitive drum is rotated by the rotating developing roller. In a developing device for supplying toner to a body surface and visualizing an electrostatic latent image on a photoreceptor surface with toner, a tip of the drive shaft and the power transmission shaft on the shaft joint side is substantially aligned with each axis. A first protrusion that is formed to project in a direction orthogonal to the first shaft, the first joint being engaged with the one of the drive shaft and the power transmission shaft so as to be relatively rotatable by a predetermined angle; And a second engagement portion that engages with the other drive projection of the drive shaft and the power transmission shaft. The first engagement portion includes any one of the drive shaft and the power transmission shaft. Relative to the shaft joint The second engagement portion accommodates a spring that elastically supports rotatably, and an engagement groove that accommodates the other drive projection of the drive shaft and the power transmission shaft; An inclined surface for guiding one of the other drive projections of the transmission shaft to the engagement groove.
像装置から供給したトナーによって感光体表面にトナー
像を形成し、その感光体表面のトナー像を転写手段によ
ってシート材に転写することを特徴とする画像形成装
置。2. The method according to claim 1, further comprising the step of: forming a toner image on the surface of the photosensitive member with the toner supplied from the developing device; and transferring the toner image on the surface of the photosensitive member to a sheet material by a transfer unit. An image forming apparatus comprising:
手において、 前記駆動軸と前記動力伝達軸のいずれか一方の駆動突起
に所定角度だけ相対回動できるように係合する第１係合
部と、前記駆動軸と前記動力伝達軸のいずれか他方の駆
動突起に係合する第２係合部とを備え、 前記第１係合部には、前記駆動軸と前記動力伝達軸のい
ずれか一方の回転駆動方向に前記軸継ぎ手を付勢するば
ねを収容し、 前記第２係合部には、前記駆動軸と前記動力伝達軸のい
ずれか他方の駆動突起を収容する係合溝と、前記駆動軸
と前記動力伝達軸のいずれか他方の駆動突起を前記係合
溝へ案内する傾斜面と、を形成したことを特徴とする軸
継ぎ手。3. A shaft coupling for connecting a drive shaft and a power transmission shaft, wherein the first engagement member engages with one of the drive projections of the drive shaft and the power transmission shaft so as to be relatively rotatable by a predetermined angle. A mating portion, and a second engaging portion that engages with one of the drive projections of the drive shaft and the power transmission shaft. The first engagement portion includes the drive shaft and the power transmission shaft. An engagement groove for accommodating a spring for urging the shaft joint in one of the rotational drive directions, and an engagement groove for accommodating the other drive projection of the drive shaft and the power transmission shaft in the second engagement portion; And a slanted surface for guiding one of the drive shaft and the other drive projection of the power transmission shaft to the engagement groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001143519A JP3540289B2 (en) | 2001-05-14 | 2001-05-14 | Developing device, image forming device and shaft coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001143519A JP3540289B2 (en) | 2001-05-14 | 2001-05-14 | Developing device, image forming device and shaft coupling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002341658A true JP2002341658A (en) | 2002-11-29 |
| JP3540289B2 JP3540289B2 (en) | 2004-07-07 |
Family
ID=18989657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001143519A Expired - Fee Related JP3540289B2 (en) | 2001-05-14 | 2001-05-14 | Developing device, image forming device and shaft coupling |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3540289B2 (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004076855A (en) * | 2002-08-19 | 2004-03-11 | Fuji Xerox Co Ltd | Driving force transmission device and image forming device using the same |
| JP2006145708A (en) * | 2004-11-17 | 2006-06-08 | Kato Electrical Mach Co Ltd | Automatic original cover plate opening/closing device and business machine equipped therewith |
| JP2008304776A (en) * | 2007-06-08 | 2008-12-18 | Kyocera Mita Corp | Drive joint mechanism of image forming apparatus |
| JP2010006540A (en) * | 2008-06-26 | 2010-01-14 | Kyocera Mita Corp | Gear unit, paper feeder, and image forming device |
| US20100054823A1 (en) * | 2008-08-27 | 2010-03-04 | Canon Kabushiki Kaisha | Developing device, developing cartridge, rotational force transmitting part and electrophotographic image forming apparatus |
| JP2011203538A (en) * | 2010-03-26 | 2011-10-13 | Kyocera Mita Corp | Drive joint mechanism of image forming apparatus, and the image forming apparatus |
| JP2018122961A (en) * | 2017-01-31 | 2018-08-09 | 株式会社Ｓｃｒｅｅｎホールディングス | Connection structure of roller and encoder, and printer equipped with the same |
| US11267666B2 (en) | 2018-09-27 | 2022-03-08 | Ricoh Company, Ltd. | Drive transmitter, sheet feeding device incorporating the drive transmitter, and image forming apparatus incorporating the drive transmitter |
| US11467528B2 (en) | 2019-06-20 | 2022-10-11 | Hewlett-Packard Development Company, L.P. | Universal coupler with coupler holder and driving coupler elastically combined with each other |
| US11579560B2 (en) | 2020-11-06 | 2023-02-14 | Sharp Kabushiki Kaisha | Driving force transmission mechanism and image forming apparatus |
-
2001
- 2001-05-14 JP JP2001143519A patent/JP3540289B2/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004076855A (en) * | 2002-08-19 | 2004-03-11 | Fuji Xerox Co Ltd | Driving force transmission device and image forming device using the same |
| JP2006145708A (en) * | 2004-11-17 | 2006-06-08 | Kato Electrical Mach Co Ltd | Automatic original cover plate opening/closing device and business machine equipped therewith |
| JP2008304776A (en) * | 2007-06-08 | 2008-12-18 | Kyocera Mita Corp | Drive joint mechanism of image forming apparatus |
| JP2010006540A (en) * | 2008-06-26 | 2010-01-14 | Kyocera Mita Corp | Gear unit, paper feeder, and image forming device |
| US20100054823A1 (en) * | 2008-08-27 | 2010-03-04 | Canon Kabushiki Kaisha | Developing device, developing cartridge, rotational force transmitting part and electrophotographic image forming apparatus |
| US8874004B2 (en) * | 2008-08-27 | 2014-10-28 | Canon Kabushiki Kaisha | Developing device having movable coupling member for engagement to electrophotographic image forming apparatus |
| JP2011203538A (en) * | 2010-03-26 | 2011-10-13 | Kyocera Mita Corp | Drive joint mechanism of image forming apparatus, and the image forming apparatus |
| JP2018122961A (en) * | 2017-01-31 | 2018-08-09 | 株式会社Ｓｃｒｅｅｎホールディングス | Connection structure of roller and encoder, and printer equipped with the same |
| US11267666B2 (en) | 2018-09-27 | 2022-03-08 | Ricoh Company, Ltd. | Drive transmitter, sheet feeding device incorporating the drive transmitter, and image forming apparatus incorporating the drive transmitter |
| US11467528B2 (en) | 2019-06-20 | 2022-10-11 | Hewlett-Packard Development Company, L.P. | Universal coupler with coupler holder and driving coupler elastically combined with each other |
| US11579560B2 (en) | 2020-11-06 | 2023-02-14 | Sharp Kabushiki Kaisha | Driving force transmission mechanism and image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3540289B2 (en) | 2004-07-07 |
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