JP5663888B2 - Developer conveying member, developing device, process cartridge, and image forming apparatus including the same - Google Patents

Developer conveying member, developing device, process cartridge, and image forming apparatus including the same Download PDF

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JP5663888B2
JP5663888B2 JP2010026851A JP2010026851A JP5663888B2 JP 5663888 B2 JP5663888 B2 JP 5663888B2 JP 2010026851 A JP2010026851 A JP 2010026851A JP 2010026851 A JP2010026851 A JP 2010026851A JP 5663888 B2 JP5663888 B2 JP 5663888B2
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developer
developing device
housing
developer conveying
bag
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JP2011164352A (en
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俊樹 林
俊樹 林
服部 良雄
良雄 服部
善行 福田
善行 福田
浅見 彰
彰 浅見
増田 克己
克己 増田
尾関 孝将
孝将 尾関
吉田 圭一
圭一 吉田
田口 信幸
信幸 田口
裕貴 佐藤
裕貴 佐藤
直志 早川
直志 早川
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Ricoh Co Ltd
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Ricoh Co Ltd
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Description

本発明は、現像剤搬送部材と現像装置とプロセスカートリッジ及びこれらを備えた画像形成装置に関する。   The present invention relates to a developer conveying member, a developing device, a process cartridge, and an image forming apparatus including these.

従来2成分現像方式による現像装置や現像装置を備えたプロセスは、水平に配置した2本乃至3本のスクリュー部材などの現像剤搬送部材を並べ、その内の1本と現像ローラや現像スリーブなどの現像剤担持体を対向させて配置し、現像剤担持体と現像剤搬送部材の間で現像剤の供給と回収を同時に進行させるやり方が一般的である。画像形成装置には、カラー化の進展に伴い連続してベタ画像を出力する場合やハーフトーン画像の性能向上の目的とプロセスカートリッジのタンデムレイアウト構成上、より小型化への要望から、特許文献1に記載のような上下に現像剤搬送部材を配置し、供給と回収を別々に行うべく断面構成上で現像剤を一方向に循環搬送させる方式も提案されている。   In a conventional two-component development system and a process equipped with a development device, a developer conveying member such as two to three screw members arranged horizontally is arranged, one of which is a development roller, a development sleeve, etc. In general, the developer carrying members are arranged so as to face each other, and the supply and recovery of the developer proceed simultaneously between the developer carrying member and the developer conveying member. In the image forming apparatus, when a solid image is continuously output with the progress of colorization, or for the purpose of improving the performance of the halftone image and the tandem layout configuration of the process cartridge, there is a demand for further miniaturization. Has also been proposed in which developer transport members are arranged above and below, and the developer is circulated and transported in one direction on a cross-sectional configuration in order to perform supply and recovery separately.

現像装置では、搬送中に感光体などの像担持体に現像剤が付着するのを防止するためにシール構造が採用されている。例えば、二本の現像剤搬送部材を水方向に配置し、現像剤供給と回収が一本で行われる現像装置では、現像剤担持体と現像剤授受を行わない方の現像剤搬送部材の上方に構成上空間があるため、現像装置のハウジング内に現像剤を充填せず、使用前の現像剤を格納する現像剤ケースを配置し、現像剤搬送部材との間にシール部材を設け、シール除去時に現像剤を重力にて落下させて充填するようにしたものがある。しかし現像剤回収用の現像剤搬送部材の上方に現像剤ケースを配置すると、画像形成装置の高さ方向に小型化が非常に困難になる。これは現像装置の上方は、レイアウト上コンパクトになるように複数の現像、感光体にまたがって転写装置が水平に配置されるためである。   In the developing device, a seal structure is employed to prevent the developer from adhering to an image carrier such as a photoconductor during conveyance. For example, in a developing device in which two developer conveying members are arranged in the water direction and the developer is supplied and collected in a single unit, the developer carrying member and the developer conveying member that does not transfer the developer are positioned above the developer conveying member. Since there is a space in the structure, a developer case for storing the developer before use is not filled in the housing of the developing device, a seal member is provided between the developer transport member and a seal. There is one in which the developer is dropped by gravity at the time of removal and filled. However, if the developer case is disposed above the developer transport member for collecting the developer, it is very difficult to reduce the size of the image forming apparatus in the height direction. This is because, above the developing device, the transfer device is horizontally arranged across a plurality of developing and photoconductors so as to be compact in layout.

予めハウジング内に現像剤を充填している現像装置やプロセスカートリッジでは、像担持体と対向する現像像担持体の周囲をシール部材でシールすることで、像担持体と現像剤との接触を防止するとともに、現像像担持体の周囲に形成されている隙間から現像剤が漏れるのを防止しているが、シール箇所が複数にまたがるため、実配置しにくい。また、現像装置内に出荷初期から現像剤を封入した場合には、現像装置の輸送や保管環境によっては、現像装置内の現像剤の状態を一定に管理することが難しい。このような不安定な現像剤による画像形成では、画像品質にバラツキが出でしまう。   In a developing device or process cartridge in which a developer is filled in advance in the housing, the periphery of the developed image carrier facing the image carrier is sealed with a seal member to prevent contact between the image carrier and the developer. At the same time, the developer is prevented from leaking from the gap formed around the developed image carrier, but it is difficult to actually arrange the seal because there are a plurality of seal locations. In addition, when the developer is sealed in the developing device from the beginning of shipment, it is difficult to manage the state of the developer in the developing device uniformly depending on the transport and storage environment of the developing device. In image formation with such an unstable developer, the image quality varies.

本発明は、小型で保管環境に左右されることなく安定した現像剤の状態を維持でき、輸送時の不具合も解消して良好な画像を得られる現像剤搬送部材と現像装置とプロセスカートリッジ及びこれらを備えた画像形成装置を提供することを、その目的とする。   The present invention provides a developer transport member, a developing device, a process cartridge, and the like that are small in size and can maintain a stable developer state without being influenced by the storage environment, and that can solve problems during transportation and obtain a good image. An object of the present invention is to provide an image forming apparatus including

本発明は、現像剤を内部に封入された可塑性を有する袋部材が一体的に装着されたことを特徴とする現像剤搬送部材に特徴を有する。   The present invention has a feature in a developer conveying member in which a plastic bag member in which a developer is sealed is integrally attached.

現像剤搬送部が、スクリュー部材で構成されている場合、袋部材は、スクリュー部材のスクリュー間に形成される空間内に巻き付けて装着することや、現像剤搬送部材の両端に、袋部材の両端側が係止して装着することを特徴とする。   In the case where the developer conveying unit is configured by a screw member, the bag member is wound and mounted in a space formed between the screws of the screw member, or both ends of the bag member are attached to both ends of the developer conveying member. The side is locked and mounted.

本発明は、現像剤担持体と、現像剤担持体を支持するハウジングと、前記ハウジング内において回転することで現像剤を搬送可能な少なくとも1つの現像剤搬送部材とを備え現像装置において、現像剤を内部に封入された可塑性を有する袋部材が一体的に装着された現像剤搬送部材を有することを特徴としている。   The present invention includes a developer carrying member, a housing that supports the developer carrying member, and at least one developer carrying member capable of carrying the developer by rotating in the housing. And a developer carrying member in which a bag member having plasticity enclosed therein is integrally mounted.

本発明において、袋部材は、作業者に把持される引き抜き部と、袋部材中の現像剤を封入する部分を横断するように設けられ引き抜き部への引き抜き動作に応じて破れる破断部とを有し、ハウジングには引き抜き部をハウジング外部に露呈させる引き抜き穴を形成したことを特徴としている。   In the present invention, the bag member has a pull-out portion that is gripped by an operator, and a break portion that is provided so as to cross a portion of the bag member that encloses the developer and is broken in accordance with the pull-out operation to the pull-out portion. The housing is characterized in that an extraction hole for exposing the extraction portion to the outside of the housing is formed.

本発明において、袋部材は、破断部を境に引き抜き部と反対側に引っ掛け部が設けられ、引っ掛け部は、現像剤搬送部材の回転軸に引っ掛けられていることを特徴としている。   In the present invention, the bag member is characterized in that a hooking portion is provided on the opposite side of the pulling portion with the broken portion as a boundary, and the hooking portion is hooked on the rotation shaft of the developer conveying member.

本発明において、引き抜き穴は、現像剤搬送部材を境にして現像剤担持体と反対側のハウジングの壁面に設けられていることを特徴としている。   In the present invention, the extraction hole is provided on the wall surface of the housing opposite to the developer carrying member with the developer conveying member as a boundary.

本発明において、引き抜き穴の大きさは、現像剤が封入された状態の袋部材を横断する方向の断面積よりも小さく形成されていることを特徴としている。本発明において、引き抜き穴の周部に磁性部材を配置したことを特徴としている。   In the present invention, the size of the extraction hole is characterized in that it is formed smaller than the cross-sectional area in the direction crossing the bag member in a state where the developer is sealed. The present invention is characterized in that a magnetic member is disposed on the periphery of the extraction hole.

本発明において、袋部材は、引き抜き方向に延在し、その一部が引き吹き部まで達する補強部材を有することを特徴としている。   In the present invention, the bag member is characterized in that it has a reinforcing member that extends in the pulling direction and a part of which extends to the blowing portion.

本発明にかかるプロセスカートリッジは、上記何れかに記載の現像装置と、少なくとも像担持体を回転可能に保持する像担持体ハウジングとを一体にしたことを特徴としている。   A process cartridge according to the present invention is characterized in that any of the developing devices described above and an image carrier housing that rotatably holds at least an image carrier are integrated.

本発明にかかる画像形成装置は、上記現像装置又は上記プロセスカートリッジを備えたことを特徴としている。   An image forming apparatus according to the present invention includes the developing device or the process cartridge.

本発明によれば、現像剤を内部に封入された可塑性を有する袋部材が一体的に装着された現像剤搬送部材を現像装置の内部に装着するので、現像剤ケースやシール部材が不要となるとともに、シール部材を用いなくても現像剤の漏れがなくなり、小型で保管環境に左右されることなく安定した現像剤の状態を維持でき、輸送時の不具合も解消して良好な画像を得られる。   According to the present invention, since the developer conveying member integrally attached with the plastic bag member enclosing the developer is attached inside the developing device, the developer case and the seal member become unnecessary. In addition, there is no leakage of developer without using a seal member, and it is small and can maintain a stable developer state without being influenced by the storage environment. .

本発明の実施の形態を適用した画像形成装置の外観斜視図である。1 is an external perspective view of an image forming apparatus to which an embodiment of the present invention is applied. 図1に示した画像形成装置の内部構成の一形態を示す概略図である。FIG. 2 is a schematic diagram illustrating one form of an internal configuration of the image forming apparatus illustrated in FIG. 1. 図1に示した画像形成装置に搭載されたプロセスカートリッジの外観斜視図である。FIG. 2 is an external perspective view of a process cartridge mounted on the image forming apparatus illustrated in FIG. 1. 現像剤を封入された袋部材が巻き付けられた現像剤搬送部材を有するプロセスカートリッジの内部構成の一形態を示す断面図である。It is sectional drawing which shows one form of the internal structure of the process cartridge which has the developing agent conveyance member by which the bag member enclosed with the developing agent was wound. 本発明の主要部となる現像剤を封入された袋部材の構成を示す拡大図である。FIG. 3 is an enlarged view showing a configuration of a bag member enclosing a developer that is a main part of the present invention. 現像剤を封入された袋部材が巻き付けられた現像剤搬送部材の構成を模式時に示す拡大図である。FIG. 3 is an enlarged view schematically showing the configuration of a developer transport member wound with a bag member enclosing a developer. 現像剤が封入された袋部材を現像剤搬送部材に巻きつけている状態を示す斜視図である。It is a perspective view which shows the state which has wound the bag member with which the developer was enclosed around the developer conveyance member. 引っ掛け部と引き抜き部を備えた袋部材の一形態を示す破断図であり、(a)は平面視図、(b)は引っ掛け部が離脱した状態を示す図である。It is a fracture view which shows one form of the bag member provided with the hook part and the extraction part, (a) is a top view, (b) is a figure which shows the state which the hook part removed. 引っ掛け部と引き抜き部を備えた袋部材の別な形態を示す破断図であり、(a)は平面視図、(b)は側面視図を示す。It is a fracture | rupture figure which shows another form of the bag member provided with the hook part and the extraction part, (a) is a top view, (b) shows a side view. 現像剤を封入する袋部材の別な形態を示す図である。It is a figure which shows another form of the bag member which encloses a developing agent. 現像剤が封入された袋部材と現像剤搬送部材の別な取付け形態を模式的に示す図である。It is a figure which shows typically another attachment form of the bag member with which the developer was enclosed, and a developer conveyance member. 袋部材の引き抜き部を引っ張る現像剤開封動作を説明する拡大図である。It is an enlarged view explaining the developer opening operation | movement which pulls the extraction part of a bag member. 引き抜き穴の近傍にガイド部を形成した形態を模式的に示す拡大図である。It is an enlarged view which shows typically the form which formed the guide part in the vicinity of the extraction hole. 引き抜き穴の近傍に磁性部材を配置した形態を模式的に示す拡大図であり、(a)はガイド部に配置した形態、(b)は引き抜き穴に同心円状に配置した形態、(c)は引き抜き穴の外側下部に配置した形態をそれぞれ示す。It is an enlarged view which shows typically the form which has arrange | positioned the magnetic member in the vicinity of the drawing hole, (a) is the form arrange | positioned in a guide part, (b) is the form arrange | positioned concentrically at the drawing hole, (c) is The form arrange | positioned in the outer side lower part of a drawing hole is each shown. 補強部材を有する袋部材の概略構成を示す図である。It is a figure which shows schematic structure of the bag member which has a reinforcement member. 袋部材に封入された現像剤が巻き付けられた複数の現像剤搬送部材を斜めに配置し、袋部材の引き抜き位置が異なる方向にある現像装置の断面図である。FIG. 4 is a cross-sectional view of a developing device in which a plurality of developer transport members wound with a developer sealed in a bag member are arranged obliquely and the bag member is pulled out in different directions. 袋部材に封入された現像剤が巻き付けられた複数の現像剤搬送部材を斜めに配置し、袋部材の引き抜き位置が同一方向にある現像装置の斜視図である。FIG. 6 is a perspective view of a developing device in which a plurality of developer conveying members wound with a developer sealed in a bag member are arranged obliquely and the bag member is pulled out in the same direction. 袋部材に封入された現像剤が巻き付けられた複数の現像剤搬送部材を斜めに配置し、袋部材の引き抜き位置が異なる方向にある現像装置の斜視図である。FIG. 5 is a perspective view of a developing device in which a plurality of developer conveying members wound with a developer sealed in a bag member are arranged obliquely and the pulling positions of the bag member are in different directions. 現像剤搬送部材の1つに袋部材を装着した現像装置の形態示す拡大図である。It is an enlarged view showing a form of a developing device in which a bag member is attached to one of the developer conveying members. 袋部材に封入された現像剤が巻き付けられた複数の現像剤搬送部材を水平に配置し、袋部材の引き抜き位置が同一方向にある現像装置を有するプロセスカートリッジの構成を示す拡大断面図である。FIG. 5 is an enlarged cross-sectional view showing a configuration of a process cartridge having a developing device in which a plurality of developer transport members wound with a developer sealed in a bag member are horizontally arranged and the bag member is pulled out in the same direction. 袋部材に封入された現像剤が巻き付けられた複数の現像剤搬送部材を水平に配置し、袋部材の引き抜き位置が異なる方向にある現像装置を有するプロセスカートリッジの構成を示す拡大断面図である。FIG. 4 is an enlarged cross-sectional view showing a configuration of a process cartridge having a developing device in which a plurality of developer conveying members wound with a developer sealed in a bag member are horizontally arranged and the bag member is pulled out in different directions.

以下、図を参照して本発明の実施形態を説明する。各実施形態及び変形例等に亘り、同一の機能もしくは形状を有する部材や構成部品等の構成要素については、判別が可能な限り同一符号を付すに留め、重複説明は省略する。
図1及び図2を参照して、本発明の実施の一形態を適用した画像形成装置の全体構成と動作を説明する。図1は本発明の実施の一形態を適用した画像形成装置の外観斜視図、図2はその画像形成装置の内部構成の一例を示す概略的な図である。両図に示した画像形成装置は、所謂タンデムタイプのカラー画像形成装置である。画像形成装置としては、カラープリンタに限るものではなく、ファクシミリ、複写機、あるいはこれら複数の機能を備えた複合機も本発明の適用範囲であり、無論、カラー、モノクロ何れであってもよい。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the embodiments and modifications, components such as members and components having the same function or shape are given the same reference numerals as much as possible, and redundant description is omitted.
With reference to FIGS. 1 and 2, the overall configuration and operation of an image forming apparatus to which an embodiment of the present invention is applied will be described. FIG. 1 is an external perspective view of an image forming apparatus to which an embodiment of the present invention is applied, and FIG. 2 is a schematic diagram showing an example of the internal configuration of the image forming apparatus. The image forming apparatus shown in both figures is a so-called tandem type color image forming apparatus. The image forming apparatus is not limited to a color printer, and a facsimile, a copying machine, or a multifunction machine having a plurality of these functions is also within the scope of the present invention, and of course may be either color or monochrome.

図1及び図2に示す画像形成装置は、装置本体1のほぼ中央に配置され、シートに画像を形成する後述の画像形成手段等を備えた画像形成部2と、画像形成部2の下方に配置され、画像形成部2にシートもしくはシート状記録媒体の一例としての用紙Sを給送する給紙部20と、画像形成部2にて画像形成された用紙Sを装置本体1の手前(両図の右側前方であり、装置正面側である)から奥側(両図の左側後方であり、装置背面側である)に排出するシート排出部としてのシート排紙部25と、画像形成部2の上部に配置され、シート排紙部25から排出される用紙Sを積載するシート積載部40を有する。
本形態において、シートとは、例えば転写紙や記録紙等の用紙(厚紙、はがき、封筒、普通紙、薄紙等を含む)、塗工紙(コート紙やアート紙等を含む)、OHPシートもしくはOHPフイルム、トレーシングペーパー等を含み、画像転写可能な被画像形成媒体を意味する。なお、画像形成部2は用紙Sに画像を記録する画像記録部2とも呼ばれ、シート積載部40は排出されたシートを載置・積載するシート載置部40とも呼ばれる。
画像形成部2は、図2に示すように、像担持体ないし潜像担持体として構成された複数のドラム状の感光体3a,3b,3c,3dを有している。各感光体3a〜3dには、互いに異なった色のトナー像がそれぞれ形成される。図示した例では、感光体3a〜3dの表面に、イエロートナー像、シアントナー像、マゼンタトナー像及びブラックトナー像がそれぞれ形成される。各感光体3a〜3dは、所定の間隔を空けて互いに平行に水平方向に配置されている。各感光体3a〜3dの下部には、中間転写体となる中間転写ベルト4が感光体3a〜3dに対向して配置されている。中間転写体にはドラム状のものを用いることもできるが、図示した例では複数の支持ローラ5,6に巻き掛けられて矢印方向(図2中反時計方向)に回転駆動される無端ベルトからなる中間転写ベルト4を用いている。支持ローラ6には、中間転写ベルト4を挟んで2次転写ローラ12が対向配置されている。
各感光体3a〜3dの周囲の構成は同様であるため、図2において一番右側に配置されたイエロートナー像が形成される感光体3aを代表して説明する。すなわち、感光体3aの周囲には、感光体3aの表面に一様な帯電処理を行う帯電手段としての帯電ローラ7と、画像情報に基づいて感光体3aの表面にレーザ光を照射して静電潜像を形成する光走査装置(LSU)8と、感光体3aの表面に形成された静電潜像を可視像化する現像装置9と、中間転写ベルト4を介して感光体3aと対向配置された1次転写装置10と、中間転写ベルト4に転写後の感光体3aの表面に残留するトナー等を除去するクリーニング手段としてのクリーニングブレード11とがこの順に設けられている。現像装置9の上方には、円筒形状のトナー容器と補給機構が配置され、現像装置9でのトナー消費に応じて補給機構が駆動し、トナー容器から現像装置9にトナーが補給される。これら感光体3a、帯電ローラ7、現像装置9、クリーニングブレード11は、一体化されていてプロセスカートリッジ30aを構成している。プロセスカートリッジ30b,30c,30dは、感光体3b,3c,3dとその周囲に配置された帯電ローラ、現像装置、クリーニングブレードによってそれぞれ構成されている。
The image forming apparatus shown in FIG. 1 and FIG. 2 is disposed almost at the center of the apparatus main body 1, and includes an image forming unit 2 provided with an image forming unit to be described later for forming an image on a sheet, and the image forming unit 2 below. A sheet feeding unit 20 that is disposed and feeds a sheet or a sheet S as an example of a sheet-like recording medium to the image forming unit 2, and the sheet S on which an image is formed by the image forming unit 2 A sheet discharge unit 25 serving as a sheet discharge unit that discharges from the front right side of the drawing and the front side of the apparatus to the back side (the rear left side of both drawings and the back side of the apparatus), and the image forming unit 2 And a sheet stacking unit 40 on which sheets S discharged from the sheet discharge unit 25 are stacked.
In this embodiment, the sheet is, for example, paper such as transfer paper or recording paper (including thick paper, postcard, envelope, plain paper, thin paper, etc.), coated paper (including coated paper, art paper, etc.), OHP sheet or It means an image forming medium capable of image transfer, including OHP film, tracing paper and the like. The image forming unit 2 is also referred to as an image recording unit 2 that records an image on the paper S, and the sheet stacking unit 40 is also referred to as a sheet mounting unit 40 that mounts and stacks discharged sheets.
As shown in FIG. 2, the image forming unit 2 includes a plurality of drum-shaped photoreceptors 3a, 3b, 3c, and 3d configured as an image carrier or a latent image carrier. Each of the photoconductors 3a to 3d is formed with toner images of different colors. In the illustrated example, a yellow toner image, a cyan toner image, a magenta toner image, and a black toner image are formed on the surfaces of the photoreceptors 3a to 3d, respectively. The photoconductors 3a to 3d are arranged in the horizontal direction in parallel with each other with a predetermined interval. An intermediate transfer belt 4 serving as an intermediate transfer member is disposed below each of the photosensitive members 3a to 3d so as to face the photosensitive members 3a to 3d. A drum-shaped intermediate transfer member can be used, but in the illustrated example, an endless belt that is wound around a plurality of support rollers 5 and 6 and rotated in the direction of the arrow (counterclockwise in FIG. 2) is used. An intermediate transfer belt 4 is used. A secondary transfer roller 12 is disposed opposite to the support roller 6 with the intermediate transfer belt 4 interposed therebetween.
Since the configuration around each of the photoconductors 3a to 3d is the same, the photoconductor 3a on which the yellow toner image arranged on the rightmost side in FIG. 2 is formed will be described as a representative. That is, around the photosensitive member 3a, the surface of the photosensitive member 3a is charged with a charging roller 7 as a charging unit, and the surface of the photosensitive member 3a is irradiated with laser light based on image information. An optical scanning device (LSU) 8 that forms an electrostatic latent image, a developing device 9 that visualizes the electrostatic latent image formed on the surface of the photosensitive member 3a, and the photosensitive member 3a via the intermediate transfer belt 4. A primary transfer device 10 disposed oppositely and a cleaning blade 11 as a cleaning unit for removing toner remaining on the surface of the photoreceptor 3a after being transferred to the intermediate transfer belt 4 are provided in this order. A cylindrical toner container and a replenishing mechanism are disposed above the developing device 9, and the replenishing mechanism is driven according to toner consumption in the developing device 9, so that toner is replenished from the toner container to the developing device 9. The photoreceptor 3a, the charging roller 7, the developing device 9, and the cleaning blade 11 are integrated to form a process cartridge 30a. The process cartridges 30b, 30c, and 30d are constituted by the photoreceptors 3b, 3c, and 3d and charging rollers, developing devices, and cleaning blades disposed around the photoreceptors 3b, 3c, and 3d, respectively.

かかる画像形成装置において画像形成が開始されると、感光体3aが図2における時計方向に図示しない駆動モータで回転駆動され、この時、帯電ローラ7によって感光体3aの表面が所定の極性に一様に帯電される。次いで、その帯電面に光走査装置8から画像情報に基づくレーザ光が照射され、これによって感光体3aに静電潜像が形成される。感光体3aの表面に形成された静電潜像は、現像装置9によってイエロートナー像として可視像化され、そのイエロートナー像は転写装置10によって中間転写ベルト4上に転写される。   When image formation is started in such an image forming apparatus, the photoreceptor 3a is rotationally driven in a clockwise direction in FIG. 2 by a drive motor (not shown). At this time, the surface of the photoreceptor 3a is made to have a predetermined polarity by the charging roller 7. It is charged like this. Next, the charged surface is irradiated with laser light based on image information from the optical scanning device 8, whereby an electrostatic latent image is formed on the photoreceptor 3 a. The electrostatic latent image formed on the surface of the photoreceptor 3 a is visualized as a yellow toner image by the developing device 9, and the yellow toner image is transferred onto the intermediate transfer belt 4 by the transfer device 10.

フルカラー画像形成時は、上記した画像形成動作が残りの全ての感光体3b〜3dで同様に行われ、これによって各感光体表面にそれぞれ形成されたイエロートナー像、シアントナー像、マゼンタトナー像及びブラックトナー像が中間転写ベルト4上に順次重ねて転写される。
画像形成部2の下方に配置された給紙部20には、転写紙、記録紙または樹脂フイルムなどから成るシートとしての用紙Sを積載するシート収容部としての給紙トレイ21と、該給紙トレイ21に積載された用紙Sを送り出す給紙コロ22と、重送された用紙Sを1枚に分離する分離手段としてのフリクションパッド23等が配設されている。
At the time of full color image formation, the image forming operation described above is performed in the same manner on all the remaining photoconductors 3b to 3d, and thereby the yellow toner image, cyan toner image, magenta toner image, and The black toner images are sequentially transferred onto the intermediate transfer belt 4 in a superimposed manner.
A paper feed unit 20 disposed below the image forming unit 2 includes a paper feed tray 21 serving as a sheet storage unit on which sheets S as sheets made of transfer paper, recording paper, resin film, and the like are stacked, and the paper feed. A paper feed roller 22 for feeding the paper S stacked on the tray 21 and a friction pad 23 as a separating unit for separating the multi-feed paper S into one sheet are provided.

この給紙部20から給送された用紙Sは、2次転写ローラ12よりも用紙搬送方向上流側に配置されたレジストローラ13に向けて送り出され、先端が停止中のレジストローラ13に一旦突き当てられる。これによって用紙S先端の斜めずれなどが修正・整合される。レジストローラ13は、中間転写ベルト4上に形成されたカラートナー像が2次転写ローラ12を配設した2次転写部で用紙Sの先端部と合致するような所定のタイミングで回転して2次転写部に向けて用紙Sを送り出す。
2次転写部で中間転写ベルト4上から未定着のカラートナー像が転写された用紙Sは、定着装置である定着部14に送られる。定着部14による加熱・加圧によって未定着のカラートナー像が定着される。定着を終えたシートSは、シート排紙部25に配置されている排紙ローラ対25a,25bで装置本体1の上面に設けられたシート積載部40に画像面が下向き(フェースダウン)で排出・排紙される。定着部14は、上記したものに限らず、ヒータを内蔵したローラ式のもの、また加熱方式もIHを採用したものなど、適宜採用することができる。なお、カラートナー像転写後の中間転写ベルト4の表面に付着する転写残トナー等は、中間転写ベルト4の周部に配置されたベルトクリーニング装置15によって除去され、次の作像・転写工程に備える。
本形態では、装置本体1の上部に画像形成部2を覆う上カバー部材としての上カバー18が設けられており、この上カバー18の上面部分をシート積載部40のシート排出台としての排紙トレイ(シート積載面)41として用いている。上カバー18の後端側の辺には支持部を設けていない。この構成によって、上カバー18の排紙トレイ41の前後方向幅より長い長尺容姿であってもその一部が排紙トレイ41を越えて後端へ垂らすことで支障なくその長尺用紙をストックすることができる。
また、上カバー18は、図2に示すように、その下部に画像形成部(画像形成手段)2の一部である光走査装置8を支持しており、装置の後端側に設けたヒンジ17を中心に上方へ開放可能に構成されている。この上カバー18は、後述するロック手段としてのロックレバー60によって装置本体1にロックされ、このロックを解除するとヒンジ17を中心にして揺動・開閉可能な状態になる。そして、図示を省略しているが、上カバー18を反時計方向へ揺動・開放すると、下部の光走査装置8がカバー18と一緒に揺動上昇され、画像形成ユニットにアクセスすることが可能となり、メンテナンス等を容易に行うことができる。さらに、本例では上カバー18を開放した部分から画像形成部2の4つのプロセスカートリッジ30a〜30dに対して交換等のため取り出し・装着や、後述する現像剤開封動作が可能とされている。
The sheet S fed from the sheet feeding unit 20 is sent out toward the registration roller 13 disposed upstream of the secondary transfer roller 12 in the sheet conveyance direction, and the leading end of the sheet S is once struck against the registration roller 13 that is stopped. Hit. This corrects and aligns the oblique displacement of the leading edge of the paper S. The registration roller 13 rotates at a predetermined timing so that the color toner image formed on the intermediate transfer belt 4 coincides with the leading edge of the sheet S at the secondary transfer portion where the secondary transfer roller 12 is disposed. The sheet S is sent out toward the next transfer section.
The sheet S on which the unfixed color toner image is transferred from the intermediate transfer belt 4 in the secondary transfer unit is sent to the fixing unit 14 which is a fixing device. The unfixed color toner image is fixed by heating and pressing by the fixing unit 14. The sheet S that has been fixed is discharged to the sheet stacking unit 40 provided on the upper surface of the apparatus main body 1 with the pair of discharge rollers 25a and 25b disposed in the sheet discharge unit 25 with the image surface facing downward (face down). • Paper is ejected. The fixing unit 14 is not limited to the above-described one, and a roller type having a built-in heater and a heating method adopting IH can be appropriately employed. Transfer residual toner or the like adhering to the surface of the intermediate transfer belt 4 after the color toner image is transferred is removed by a belt cleaning device 15 disposed on the peripheral portion of the intermediate transfer belt 4 to be used in the next image formation / transfer process. Prepare.
In this embodiment, an upper cover 18 as an upper cover member that covers the image forming unit 2 is provided on the upper portion of the apparatus main body 1, and the upper surface portion of the upper cover 18 is discharged as a sheet discharge table of the sheet stacking unit 40. A tray (sheet stacking surface) 41 is used. A support portion is not provided on the rear end side of the upper cover 18. With this configuration, even if the length of the upper cover 18 is longer than the width of the discharge tray 41 in the front-rear direction, a part of the upper cover 18 passes over the discharge tray 41 and hangs to the rear end, so that the long sheets can be stored without any problem. can do.
Further, as shown in FIG. 2, the upper cover 18 supports an optical scanning device 8 which is a part of the image forming unit (image forming means) 2 at a lower portion thereof, and is a hinge provided on the rear end side of the device. 17 is configured to be openable upward. The upper cover 18 is locked to the apparatus main body 1 by a lock lever 60 serving as a locking means, which will be described later. When the lock is released, the upper cover 18 can be swung and opened / closed around the hinge 17. Although not shown, when the upper cover 18 is swung and opened counterclockwise, the lower optical scanning device 8 is swung up together with the cover 18 and can access the image forming unit. Thus, maintenance and the like can be easily performed. Further, in this example, the four process cartridges 30a to 30d of the image forming unit 2 can be taken out and attached for replacement etc. from the portion where the upper cover 18 is opened, and the developer opening operation described later can be performed.

上記した上カバー18を揺動・開放するとき、排紙トレイ41の後端側が下となるように揺動上昇されるが、排紙トレイ41上に用紙Sがストックされているときに誤って揺動・開放してしまうと、ストックしていた用紙Sが装置の後側に落下するという問題が生じる。すなわち、ストックした用紙Sを取り忘れて上カバー18を回動してしまうと、排紙トレイ41にストックした用紙Sが装置本体1の裏側に落ちてしまう。この用紙Sの落下は、図示しない支持部を上カバー18の後端側にも設けることによって解決できるが、長尺用紙の場合その後端支持部に当たりストックに支障がでてしまう。
そこで、本形態では、ロックレバー60のロックを解除して上カバー18を揺動・開放可能状態にする操作部61を排紙トレイ41上で、しかもストックされた用紙Sで隠れる位置に設けている。このロックレバー60には、一端側にユーザーが操作する操作部61が、他端側に装置本体1に固着された突起64に係合するロック爪62がそれぞれ一体的に設けられている。ロックレバー60は、上カバー18に固着されたピン63を中心に回動可能に支持されており、またピン63の回りに装着された図示しないねじりコイルばねによって、ロック爪62が常に突起64に係合する向きの揺動付勢力が付与されている。ロックレバー60の操作部61は、排紙トレイ41と同一面上に沿うような面を備えた板材で形成されていて、排紙トレイ41にはその操作部61に手を掛けられるようにするための図1に示す扇状の凹部44が形成されている。
このような構成によると、上カバー18を開放するときには凹部44から手を差し込み、図示しないねじりコイルばねの揺動付勢力に抗してロックレバー60の操作部61を上に持ち上げることにより、ロックレバー60がピン63を中心に時計方向に回転し、ロック爪62が突起64から外れる。そして、そのまま操作部61を持ち上げることで、上カバー18はヒンジ17を中心として揺動される。このように上カバー18を揺動・開閉可能にするロックレバー60の操作部61を用紙Sのストックされる排紙トレイ41に配置しているので、排紙トレイ41上に用紙Sがある状態で上カバー18を揺動・開放してしまうことが確実に防止される。
When the upper cover 18 is swung and opened, it is swung up so that the rear end side of the paper discharge tray 41 is down. However, when the paper S is stocked on the paper discharge tray 41, the upper cover 18 is erroneously moved. If it is swung and released, there is a problem that the stocked paper S falls to the rear side of the apparatus. That is, if the stocked paper S is forgotten and the upper cover 18 is rotated, the stocked paper S on the paper discharge tray 41 falls to the back side of the apparatus main body 1. The fall of the paper S can be solved by providing a support portion (not shown) on the rear end side of the upper cover 18, but in the case of a long paper, the rear end support portion is hit and the stock is disturbed.
Therefore, in the present embodiment, an operation unit 61 that releases the lock of the lock lever 60 and swings and opens the upper cover 18 is provided on the paper discharge tray 41 at a position hidden by the stocked paper S. Yes. The lock lever 60 is integrally provided with an operation portion 61 operated by a user on one end side and a lock claw 62 engaged with a protrusion 64 fixed to the apparatus main body 1 on the other end side. The lock lever 60 is supported so as to be rotatable around a pin 63 fixed to the upper cover 18, and the lock claw 62 is always formed on the projection 64 by a torsion coil spring (not shown) mounted around the pin 63. A swinging urging force in an engaging direction is applied. The operation unit 61 of the lock lever 60 is formed of a plate material having a surface that is on the same plane as the paper discharge tray 41, and the operation unit 61 can be put on the paper discharge tray 41. For this purpose, a fan-shaped recess 44 shown in FIG. 1 is formed.
According to such a configuration, when opening the upper cover 18, a hand is inserted from the recess 44, and the operation portion 61 of the lock lever 60 is lifted up against a swinging biasing force of a torsion coil spring (not shown). The lever 60 rotates clockwise about the pin 63, and the lock claw 62 is disengaged from the protrusion 64. Then, the upper cover 18 is swung around the hinge 17 by lifting the operation unit 61 as it is. As described above, the operation unit 61 of the lock lever 60 that allows the upper cover 18 to swing and open / close is disposed on the paper discharge tray 41 on which the paper S is stocked. Thus, the upper cover 18 is reliably prevented from swinging and opening.

図3はプロセスカートリッジ30a〜30dの概観斜視図であり、図4はプロセスカートリッジ概略断面図である。各プロセスカートリッジの構成は、トナーの色が異なる以外は同様であるため、図2において一番右側に配置されたイエローのプロセスカートリッジ30aを例にその構成を詳しく説明する。
図3,図4に示すように、プロセスカートリッジ30aは、感光体3a等が装着された感光体ハウジング31と、現像装置9を構成する各種部品が装着された現像ハウジング32とを有する。感光体ハウジング31と現像ハウジング32は、組付け・分離可能に構成されている。互いに組み付けられた感光体ハウジング31と現像ハウジング32との間には、図1に示す光走査装置8から感光体3aに照射されるレーザ光を通すレーザ光路空間33が形成されている。
感光体ハウジング31には、感光体3a以外に、帯電ローラ7、帯電ローラの表面をクリーニングする帯電ローラ清掃部材26、クリーニングブレード11、クリーニングブレード11で感光体3aの表面から除去したトナーを図示しない廃トナー回収部へと搬送する廃トナー回収用のスクリュー部材27、潤滑剤28、潤滑剤28を削り取って感光体3aの表面に塗布する潤滑剤塗布ブラシ29が装着されている。
一方、現像ハウジング32には、現像剤を表面に担持する現像剤担持体としての現像ローラ34、現像剤を供給する供給路35内に配設され、現像剤を現像ローラ34に供給する供給側の現像剤搬送部材となる供給スクリュー部材36、供給路35の下部に位置し現像剤を回収する回収路37内に配設された回収側の現像剤搬送部材となる回収スクリュー部材38、現像ローラ34の表面に担持される現像剤の厚さを規制する規制部材としてのドクターブレード39、回収路37内のトナー濃度を検知するトナー濃度センサ42が装着されている。
本実施形態における現像装置9では、トナーとキャリアから成る2成分の現像剤Gを使用している。現像剤Gに用いるトナーは、少なくとも、窒素原子を含む官能基を有するポリエステルプレポリマー、ポリエステル、着色剤及び離型剤を有機溶媒中に分散させたトナー材料液を、水系媒体中で架橋及び伸張反応の少なくとも一方を行って得られるトナーである。
3 is a schematic perspective view of the process cartridges 30a to 30d, and FIG. 4 is a schematic sectional view of the process cartridge. Since the configuration of each process cartridge is the same except that the color of the toner is different, the configuration will be described in detail using the yellow process cartridge 30a arranged on the rightmost side in FIG. 2 as an example.
As shown in FIGS. 3 and 4, the process cartridge 30 a includes a photoconductor housing 31 to which the photoconductor 3 a and the like are mounted, and a developing housing 32 to which various components constituting the developing device 9 are mounted. The photoconductor housing 31 and the developing housing 32 are configured to be assembled and separated. Between the photoconductor housing 31 and the development housing 32 assembled to each other, a laser beam path space 33 through which the laser beam irradiated to the photoconductor 3a from the optical scanning device 8 shown in FIG. 1 is formed.
In addition to the photoreceptor 3a, the photoreceptor housing 31 is not shown with the charging roller 7, the charging roller cleaning member 26 for cleaning the surface of the charging roller, the cleaning blade 11, and the toner removed from the surface of the photoreceptor 3a by the cleaning blade 11 (not shown). A waste toner collecting screw member 27, a lubricant 28, and a lubricant 28, which are conveyed to the waste toner collecting section, are scraped off and applied to the surface of the photoreceptor 3a.
On the other hand, the developing housing 32 is arranged in a developing roller 34 as a developer carrying member for carrying the developer on the surface and a supply path 35 for supplying the developer, and a supply side for supplying the developer to the developing roller 34. A supply screw member 36 serving as a developer transport member, a recovery screw member 38 serving as a recovery-side developer transport member disposed in a recovery path 37 that is located below the supply path 35 and collects the developer, and a developing roller A doctor blade 39 as a regulating member for regulating the thickness of the developer carried on the surface of 34 and a toner density sensor 42 for detecting the toner density in the collection path 37 are mounted.
In the developing device 9 in this embodiment, a two-component developer G composed of toner and carrier is used. The toner used for the developer G is at least a polyester material having a functional group containing a nitrogen atom, polyester, a colorant, and a toner material solution in which a release agent is dispersed in an organic solvent. A toner obtained by performing at least one of the reactions.

現像装置9は、供給スクリュー部材36と回収スクリュー部材38とが上下に配置された構成であり、供給路35内の現像剤は、供給スクリュー部材36によって搬送され、供給路35の開口部から落下して現像ローラ34上に担持される。現像ローラ34上に担持された現像剤は、ドクターブレード39と現像ローラ34の表面との間の所定の隙間を通過することによって所定の厚さに規制される。そして、現像剤が現像ローラ34と感光体3aとの対向位置(感光体ギャップ)に搬送された際、現像剤のトナーが感光体3aへ静電的に転移して感光体3a上の静電潜像が現像化される。その後、現像ローラ34上の現像剤は回収路37へ回収される。回収路37に回収された現像剤は、回収スクリュー部材38によって搬送されその搬送方向の下流側で堆積し、堆積した現像剤は図示しない搬送手段によって再び供給路35内へ搬送される。供給路35内では、消費されたトナー量に応じて図示しないトナー補給部からトナーが補給される。また、トナー濃度センサ42によって回収路37内の現像剤のトナー濃度が磁気的に検知され、その検知情報に基づいてトナー濃度調整が行われる。
上記のように、本形態の現像装置9では、現像ローラ34に供給されトナーを消費した現像剤は、そのまま現像ローラ34へ繰り返し供給されずに一旦回収され、その後トナーが補給される。すなわち、現像ロー34には、未使用の現像剤が供給されるか、又は使用後にトナーが補給された現像剤が供給されるため、特許文献1に記載の現像装置と異なり、現像ローラの長手方向の両端において画像の濃度に差異が生じるのを抑制できる。
The developing device 9 has a configuration in which a supply screw member 36 and a recovery screw member 38 are arranged up and down, and the developer in the supply path 35 is conveyed by the supply screw member 36 and falls from the opening of the supply path 35. Then, it is carried on the developing roller 34. The developer carried on the developing roller 34 is regulated to a predetermined thickness by passing through a predetermined gap between the doctor blade 39 and the surface of the developing roller 34. When the developer is conveyed to a position (photoconductor gap) between the developing roller 34 and the photoconductor 3a, the toner of the developer is electrostatically transferred to the photoconductor 3a, and the electrostatic charge on the photoconductor 3a. The latent image is developed. Thereafter, the developer on the developing roller 34 is collected in the collecting path 37. The developer recovered in the recovery path 37 is transported by the recovery screw member 38 and accumulated downstream in the transport direction, and the deposited developer is transported again into the supply path 35 by transport means (not shown). In the supply path 35, toner is supplied from a toner supply unit (not shown) according to the amount of consumed toner. Further, the toner concentration of the developer in the collection path 37 is magnetically detected by the toner concentration sensor 42, and the toner concentration is adjusted based on the detection information.
As described above, in the developing device 9 of the present embodiment, the developer that is supplied to the developing roller 34 and consumes the toner is temporarily collected without being repeatedly supplied to the developing roller 34 as it is, and then the toner is replenished. That is, since the unused developer is supplied to the developing row 34, or the developer supplied with toner after use is supplied, unlike the developing device described in Patent Document 1, the length of the developing roller It is possible to suppress a difference in image density at both ends in the direction.

次に本発明の特徴部分について説明する。
本発明の特徴の1つは、図5に示すように、従来、現像装置9内の供給路35や回収路37に装置出荷時から直接充填されていた現像剤Gを、可塑性を有する袋部材となる封入容器100に収納して密閉状態としたことにあり、今1つの特徴は、図5に示すように、これら現像剤Gを封入した封入容器100を現像剤搬送部材と一体的に装着したことにある。本形態において、現像剤搬送部材とは、周知のスクリュー部材、パドル部材、アジテータなどが含まれる。
Next, features of the present invention will be described.
One of the features of the present invention is that, as shown in FIG. 5, the developer G that has been directly filled in the supply path 35 and the recovery path 37 in the developing apparatus 9 from the time of shipment of the apparatus is used as a bag member having plasticity. The sealed container 100 is sealed in a sealed state. One feature is that, as shown in FIG. 5, the sealed container 100 in which the developer G is sealed is mounted integrally with the developer conveying member. It is to have done. In this embodiment, the developer conveying member includes a known screw member, paddle member, agitator, and the like.

封入容器100は、図5に示すように、変形可能な筒状であって、内部に現像剤Gと窒素を一緒に入れて膨らまし、棒状として容器の両端100A,100Bを閉じて密閉することで、容器内部に現像剤Gを封入している。   As shown in FIG. 5, the sealed container 100 has a deformable cylindrical shape, in which developer G and nitrogen are put together to be inflated, and both ends 100 </ b> A and 100 </ b> B of the container are closed and sealed as a rod shape. The developer G is sealed inside the container.

封入容器100の一端100A側には、袋部材中の現像剤Gを封入する部分100Cを横断するように設けられた破断部101が形成され、他端100B側には作業者に把持される引き抜き部102が形成されている。破断部101は、引き抜き部102が作業者によっての引き抜き方向に引く現像剤開封動作が成されると破断する程度の強さとされている。   A breakage portion 101 is formed on one end 100A side of the enclosing container 100 so as to cross a portion 100C that encloses the developer G in the bag member, and on the other end 100B side, a pullout that is held by an operator. A portion 102 is formed. The breaking portion 101 has such a strength that the pulling portion 102 is broken when the developer opening operation is performed in which the pulling portion 102 is pulled in the drawing direction by the operator.

そして、このように現像剤Gと窒素が封入された封入容器100は、例えば供給スクリュー部材36を例にとると、図6,図7に示すように、供給スクリュー部材36,38に形成されている複数のスクリュー36A,38A間に形成される空間36B,38B内を縫うようにして巻き付けられて供給スクリュー部材36,38に一体的に装着される。そして、本形態では、このような封入容器100が一体化された現像剤搬送部材を、現像装置9に装置出荷時から装着している。図4に示す例では、封入容器100を供給スクリュー部材36と回収スクリュー部材38の双方にそれぞれ一体的に装着したものが現像装置9に装着されている。   The enclosing container 100 filled with the developer G and nitrogen is formed on the supply screw members 36 and 38 as shown in FIGS. 6 and 7, for example, taking the supply screw member 36 as an example. The spaces 36B and 38B formed between the plurality of screws 36A and 38A are wound so as to sew and are integrally attached to the supply screw members 36 and 38. In this embodiment, the developer conveying member in which such a sealed container 100 is integrated is mounted on the developing device 9 from the time of shipping the device. In the example shown in FIG. 4, the developing container 9 is mounted with the sealed container 100 integrally mounted on both the supply screw member 36 and the recovery screw member 38.

図4に示すように、現像装置9の現像ハウジング32には、供給スクリュー部材36や回収スクリュー部材38との対向部位に、現像ハウジング32を貫通し、封入容器100の引き抜き部102を挿通してハウジング外部に露呈する引き抜き穴110,110を形成している。図4に示す例では、封入容器100が2つセットされているので、引き抜き穴110,111も2つ形成されている。そして、この形態では、引き抜き部102が斜め上方に引き出せるように引き抜き穴110,111を形成している。このため、引き抜き部102を引き抜きする際に引き抜き易くなる。本形態では、現像剤搬送部材となるスクリュー部材36と回収スクリュー部材38の双方に封入容器100を一体的に装着しているが、何れか一方だけでもよい。この場合、引き抜き穴も引き抜き穴110または引き抜き穴111の何れか一方だけでもよい。   As shown in FIG. 4, the developing housing 32 of the developing device 9 passes through the developing housing 32 at a portion facing the supply screw member 36 and the recovery screw member 38 and is inserted through the extraction portion 102 of the enclosure 100. Pull-out holes 110 and 110 that are exposed to the outside of the housing are formed. In the example shown in FIG. 4, since two enclosures 100 are set, two extraction holes 110 and 111 are also formed. In this embodiment, the extraction holes 110 and 111 are formed so that the extraction portion 102 can be extracted obliquely upward. For this reason, it becomes easy to pull out the pulling portion 102 when pulling out. In this embodiment, the enclosing container 100 is integrally mounted on both the screw member 36 and the recovery screw member 38 which are developer conveying members, but either one may be used. In this case, the extraction hole may be either the extraction hole 110 or the extraction hole 111.

次に封入容器100の密閉方式について説明する。封入容器100を有底状の袋とすると、図5に示すように、現像剤Gと窒素を入れた後に一端100A側を絞り込んでカシメることで密閉することができる。この形態の場合、現像装置9に供給スクリュー部材36や回収スクリュー部材38を装着した状態で一端100A側をハウジング3に固定し、他端100B側の引き抜き部102を引き抜き穴110、111に挿通してハウジング外部に露呈させる。   Next, the sealing method of the enclosure 100 will be described. When the sealed container 100 is a bottomed bag, as shown in FIG. 5, after the developer G and nitrogen are added, the one end 100 </ b> A side is squeezed and caulked to be sealed. In the case of this form, the one end 100A side is fixed to the housing 3 with the supply screw member 36 and the recovery screw member 38 attached to the developing device 9, and the extraction portion 102 on the other end 100B side is inserted into the extraction holes 110 and 111. To expose outside the housing.

図8に示す形態では、両端が開口された筒状の封入容器100の一端100A側を絞り込み、引っ掛け部となるリング状のフック部材103を装着してその根元をカシメ、他端100B側は熱溶着して帯状にして密閉している。この形態の場合には、帯状部分104が引き抜き部として形成され、フック部材103よりも他端100B寄りに破断部101を形成する。この形態ではフック部103の取付部が破談部101となる。フック部103は、たとえば、図7に示すように、各スクリュー部材の回転軸36C,38Cに引っ掛け、引き抜き部102は現像ハウジング32に形成した引き抜き穴110,111にそれぞれ挿通してハウジング外部に露呈させる。   In the form shown in FIG. 8, one end 100A side of the cylindrical enclosure 100 having both ends opened is narrowed down, and a ring-shaped hook member 103 serving as a hooking portion is attached to crimp the root, and the other end 100B side is heated. It is welded and banded and sealed. In the case of this form, the band-like portion 104 is formed as a pull-out portion, and the fracture portion 101 is formed closer to the other end 100B than the hook member 103. In this embodiment, the hook part 103 is attached to the broken part 101. For example, as shown in FIG. 7, the hook portion 103 is hooked on the rotation shafts 36 </ b> C and 38 </ b> C of each screw member, and the extraction portion 102 is inserted into extraction holes 110 and 111 formed in the developing housing 32 and exposed outside the housing. Let

図9に示す形態では、筒状の封入容器100の両端を熱溶着して帯状にして密閉し、一端100A側の帯状部分105を穿孔してフック部106として形成し、他端100B側の帯状部分104を引き抜き部102としている。この場合も、図8の形態と同様に、フック部106を図7に示す各スクリュー部材の回転軸36C,38Cに引っ掛け、各引き抜き部102は現像ハウジング32に形成した引き抜き穴110,111に挿通してハウジング外部に露呈させる。すなわち、封入容器100は、破断部101を境に引き抜き部102と反対側に引っ掛け部103,106が設けられる構成となる。   In the form shown in FIG. 9, both ends of the cylindrical enclosure 100 are heat-sealed to form a band, and the band-shaped portion 105 on one end 100 </ b> A side is perforated to form a hook portion 106, and the band-shaped on the other end 100 </ b> B side. The portion 104 is the extraction portion 102. Also in this case, similarly to the embodiment of FIG. 8, the hook portion 106 is hooked on the rotation shafts 36 </ b> C and 38 </ b> C of each screw member shown in FIG. 7, and each drawing portion 102 is inserted into the drawing holes 110 and 111 formed in the developing housing 32. And exposed outside the housing. That is, the sealed container 100 is configured such that the hook portions 103 and 106 are provided on the opposite side of the pull-out portion 102 with the break portion 101 as a boundary.

引き抜き部102の形状としては、紐状あるいは帯状が挙げられる。紐状の場合、作業者が引き抜き穴110,111から露呈している部分を指などに巻き付けて引き抜くことができるので引き易い。帯状の場合、指で摘まんで引き抜く際にもち易いという利点がある。   Examples of the shape of the extraction portion 102 include a string shape or a belt shape. In the case of the string shape, the operator can easily pull the portion exposed from the extraction holes 110 and 111 by winding it around a finger or the like. In the case of a belt-like shape, there is an advantage that it is easy to hold it when it is picked up by a finger and pulled out.

引き抜き穴110,111の設ける場所としては、図3、図4に示すように、各スクリュー部材36,38の境にして現像ローラ34と反対側の現像ハウジング32の壁面32Aに設ける。   As shown in FIGS. 3 and 4, the drawing holes 110 and 111 are provided on the wall surface 32 </ b> A of the developing housing 32 on the opposite side of the developing roller 34 between the screw members 36 and 38.

封入容器100としては現像装置9に設置される各スクリュー部材36,38に巻き付けるため、可塑性を有するのが好ましく、その材質としてはナイロン、塩化ビニリデン、ポリエチレン、ポリエステル、セルローズ等が挙げられる。また、湿気などを考慮すると薄いアルミシート材で形成してもよい。容器の形態としては、上述のような袋形状や筒状部材の両端をカシメや溶着する形態だけでなく、図10に示すように4方向を溶着して余白部107を形成したラミネート構造としてもよい。   The enclosing container 100 preferably has plasticity because it is wound around the screw members 36 and 38 installed in the developing device 9, and examples of the material include nylon, vinylidene chloride, polyethylene, polyester, and cellulose. In consideration of moisture and the like, the aluminum sheet material may be used. As a form of the container, not only the above-described bag shape or a form in which both ends of the cylindrical member are crimped or welded, but also a laminated structure in which the margin part 107 is formed by welding in four directions as shown in FIG. Good.

上記形態では、現像剤Gと窒素を封入した封入容器100を各スクリュー部材のスクリュー36A,38Aの間の空間36B,38Bに巻き付けて各スクリュー部材と一体的に装着したが、本発明はこのような形成に限定されるものでない。他の形態としては、例えば図11に示すように、現像剤搬送部材となるスクリュー部材36、38の少なくとも一方の両端から突出している回転軸36Cや回転軸38Cの両端36Ca,36Cb、38Ca,38Cbに、封入容器100の両端100A,100Bを掛け渡すように係止して一体的に装着するようにしてもよい。この場合、一端100A側にはフック部103、106を形成し、他端100Bの引き抜き部102を穿孔してフック部106と同様な引っ掛け部を形成し、両端を回転軸36Cや回転軸38Cに引っ掛けることで供給スクリュー部材36や回収スクリュー部材38と封入容器100一体化することができる。   In the above embodiment, the enclosing container 100 enclosing the developer G and nitrogen is wound around the spaces 36B and 38B between the screws 36A and 38A of each screw member, and is mounted integrally with each screw member. It is not limited to the formation. As other forms, for example, as shown in FIG. 11, the rotating shaft 36C protruding from at least one end of the screw members 36, 38 serving as a developer conveying member and both ends 36Ca, 36Cb, 38Ca, 38Cb of the rotating shaft 38C. In addition, the both ends 100A and 100B of the enclosing container 100 may be latched and attached integrally. In this case, hook portions 103 and 106 are formed on the one end 100A side, the pulling portion 102 on the other end 100B is perforated to form a hook portion similar to the hook portion 106, and both ends are connected to the rotating shaft 36C and the rotating shaft 38C. The supply screw member 36 and the recovery screw member 38 can be integrated with the sealed container 100 by being hooked.

このように封入容器100を掛け渡して現像剤搬送部材と一体的にすると、スクリュー間に封入容器100を巻き付ける作業が不要となるので、組付け時間の短縮を図れるという利点がある。   When the enclosing container 100 is stretched over and integrated with the developer conveying member in this manner, there is no need to wrap the enclosing container 100 between the screws, and there is an advantage that the assembling time can be shortened.

封入容器100を一体化した供給スクリュー部材36や回収スクリュー部材38を現像装置9に装着して感光体ハウジング31と合わせて一体化することで各プロセスカートリッジが形成され、これらプロセスカートリッジの状態で装置本体1にセットする。このため、湿度に弱い現像剤Gでも完全密閉される封入容器100に入れて現像装置9内に保存できるので、装置の保管状態に左右されることがなく(温度や湿度の影響を受けることがなく)、未使用の現像剤Gが安定した状態で保存され、良好な画像を得られる。封入容器100内に現像剤Gと一緒に窒素などの不活性ガスも充填するので、より未使用の現像剤Gの長期保管を容易に行える。   Each of the process cartridges is formed by mounting the supply screw member 36 and the recovery screw member 38 in which the sealed container 100 is integrated on the developing device 9 and integrating them with the photosensitive member housing 31. Set in the main body 1. For this reason, even developer G weak in humidity can be stored in the developing device 9 in a completely sealed enclosure 100, so that it is not affected by the storage state of the device (it may be affected by temperature and humidity). No), unused developer G is stored in a stable state, and a good image can be obtained. Since the enclosing container 100 is filled with an inert gas such as nitrogen together with the developer G, the unused developer G can be easily stored for a long period of time.

未使用の現像剤Gは封入容器100内に密閉されているため、シール部材が無くても輸送時に各現像ローラや各感光体と接触することがなくなるので、シール部材が不要となるとともに未使用の現像剤Gの漏れも防止できる。   Since the unused developer G is hermetically sealed in the sealed container 100, it does not come into contact with each developing roller or each photoconductor during transportation even without a seal member. The leakage of the developer G can also be prevented.

画像成形装置を出荷状態から最初に使用する場合、あるいはプロセスカートリッジを交換して新品のものを使用する場合、図12に示すように、作業者が引き抜き穴110,111から現像ハウジング32の外部に露呈している引き抜き部102を現像ハウジング32の外側に向かって引き抜く現像剤開封動作を行う。このとき、封入容器100の一端100Aは現送装置9に固定あるいは回転軸36C,38Cに係止されているので、封入容器100が引き抜き方向に引っ張られ、引っ張り力が破談部101の強度を超えると、封入容器100が図8,図9に示すように破談部101から引きちぎれ、封入されていた現像剤Gが現像ハウジング32内、具体的には供給路35と回収路37内に放出される。つまり、画像形成直前に、引き抜き部102を引き抜き穴110,111から引き抜く動作で破断部101が破れ、現像剤Gの現像装置9内へのセットを完了できる。この現像剤開封動作は、各プロセスカートリッジを装置本体1から離脱して状態で行なってもよいし、装置本体1にセットした状態でも行なえる。   When the image forming apparatus is used for the first time from the shipping state, or when the process cartridge is replaced and a new one is used, as shown in FIG. A developer opening operation for pulling out the exposed pulling portion 102 toward the outside of the developing housing 32 is performed. At this time, since the one end 100A of the sealed container 100 is fixed to the current feeding device 9 or locked to the rotary shafts 36C and 38C, the sealed container 100 is pulled in the pulling direction, and the pulling force exceeds the strength of the broken part 101. 8 and 9, the sealed container 100 is torn off from the broken part 101, and the sealed developer G is discharged into the development housing 32, specifically into the supply path 35 and the recovery path 37. . That is, immediately before the image formation, the breaking portion 101 is broken by the operation of pulling out the drawing portion 102 from the drawing holes 110 and 111, and the setting of the developer G into the developing device 9 can be completed. This developer opening operation may be performed in a state where each process cartridge is detached from the apparatus main body 1 or set in the apparatus main body 1.

このとき、図12に示すように、引き抜き穴110,111の大きさとなる直径Rを現像剤Gが封入された状態の封入容器100を横断する方向の断面積幅R1よりも小さく形成していると、封入容器100内の現像剤Gが引き抜き穴110,111を通過し難くなる。すなわち、封入容器100が引き抜き穴110,111内を通過する際に搾り出されるので、この搾り作用により容器内から押し出された現像剤Gが開放された一端100A側から放出されることになる。よって、封入容器100内の現像剤Gを現像ハウジング32内に効率よく放出することができる。   At this time, as shown in FIG. 12, the diameter R corresponding to the size of the extraction holes 110 and 111 is formed to be smaller than the cross-sectional area width R1 in the direction crossing the sealed container 100 in the state where the developer G is sealed. Then, it becomes difficult for the developer G in the enclosure 100 to pass through the extraction holes 110 and 111. That is, since the sealed container 100 is squeezed when passing through the extraction holes 110 and 111, the developer G pushed out from the container by this squeezing action is released from the opened one end 100A side. Therefore, the developer G in the enclosure 100 can be efficiently released into the development housing 32.

封入容器100には、破断部101を境に引き抜き部102と反対側に引っ掛け部103,106が形成され、これら引っ掛け部103,106は、供給スクリュー部材36や回収スクリュー部材38の回転軸36C、38Cにそれぞれ引っ掛けられているので、引き抜き部102を引っ張ることで、回転軸36C,38Cに引っ掛け部103,106が引っ掛って固定されるため、引き抜き動作時に破断部111の破断を容易に行える。   The enclosing container 100 is formed with hook portions 103 and 106 on the opposite side of the pull-out portion 102 with the break portion 101 as a boundary, and these hook portions 103 and 106 are the rotation shaft 36C of the supply screw member 36 and the recovery screw member 38, Since the hook portions 103 and 106 are hooked and fixed to the rotary shafts 36C and 38C by pulling the pull-out portion 102, the break portion 111 can be easily broken during the pull-out operation.

このように、現像剤Gを予め封入容器100に封入しておくことで、未使用の現像装置9の開口部を、従来のようにシールするシール部材が不要になる。また封入容器100が加塑性を有するので、レイアウトの小規模な現像装置9内の空間を有効活用することができる。   In this way, by sealing the developer G in the sealing container 100 in advance, a sealing member for sealing the opening of the unused developing device 9 as in the conventional case becomes unnecessary. Further, since the sealed container 100 has plasticity, the space in the developing device 9 having a small layout can be used effectively.

現像剤Gを封入した封入容器100を供給スクリュー部材36や回収スクリュー部材38と一体的にすることで、サブアッシー化でき、部品としての搬送効率を高めることができる。さらに、各スクリュー部材のスクリュー間の空間36B,38Bに封入容器100を巻き付けて装着する場合、搬送に使用しないときには余剰空間となる空間36B,38Bを有効に利用することができ、コンパクトな現像装置9やプロセスカートリッジ30であっても、容易に封入容器100を収納することができる。   By integrating the enclosing container 100 enclosing the developer G with the supply screw member 36 and the recovery screw member 38, it is possible to make a sub-assembly and to improve the conveyance efficiency as a part. Further, when the sealed container 100 is wound around and installed in the spaces 36B and 38B between the screws of each screw member, the spaces 36B and 38B that become surplus spaces when not used for conveyance can be used effectively, and a compact developing device can be used. 9 and the process cartridge 30 can easily store the enclosure 100.

引き抜き部102が現像ハウジング32に形成した引き抜き穴110,111からハウジング外部に突出して露呈されているので、現像装置9の外側から封入容器100を開放して現像剤Gを現像装置9内に放出することができる。また、引き抜き穴110,111は現像ローラ34やドクターブレード39が配置されていて側の壁部32Aに形成しているので、引き抜き部102の引き抜きと動作時に、これら部材と接触することがなく、ドクタープレード39への異物の付着も防止することができる。   Since the drawing portion 102 is exposed through the drawing holes 110 and 111 formed in the developing housing 32 to the outside of the housing, the enclosing container 100 is opened from the outside of the developing device 9 to release the developer G into the developing device 9. can do. Further, since the drawing holes 110 and 111 are formed in the wall portion 32A on the side where the developing roller 34 and the doctor blade 39 are arranged, they do not come into contact with these members when the drawing portion 102 is drawn and operated. Adherence of foreign matter to the doctor blade 39 can also be prevented.

次に引き抜き穴110,111の形状について説明する。   Next, the shape of the extraction holes 110 and 111 will be described.

図12に示すように、現像ハウジング32の壁部32Aを貫通して形成された引き抜き穴110,111の径Rは、壁部32Aの厚さ方向に同一径としているが、同一径で、かつ小径であると、引き抜き部102を引き抜く際に現像剤Gが引き抜き穴110,111の付近で圧を受けるので固着し易く、引き抜き抵抗も大きくなることが考えられる。このため、図13に示すように、引き抜き穴110,111が形成された壁部32Aの内面32Bに、引き抜き穴110,111に向かって徐々に壁部32Aの断面積が小さくなる傾斜したガイド部120を、引き抜き穴110,111にそれぞれ連通するように形成する。このようなガイド部120を形成すると、引き抜き部102を引き抜く際に封入容器100の断面が徐々に狭められるので抵抗が少なく、スムーズな引き抜き動作を行えるとともに、現像剤Gの固着も低減することができる。   As shown in FIG. 12, the diameters R of the extraction holes 110 and 111 formed through the wall 32A of the developing housing 32 are the same in the thickness direction of the wall 32A. If the diameter is small, the developer G receives pressure in the vicinity of the extraction holes 110 and 111 when the extraction portion 102 is extracted, so that it can be easily fixed and the extraction resistance can be increased. For this reason, as shown in FIG. 13, the inclined guide portion on the inner surface 32 </ b> B of the wall portion 32 </ b> A in which the extraction holes 110 and 111 are formed is gradually reduced toward the extraction holes 110 and 111. 120 is formed so as to communicate with the extraction holes 110 and 111, respectively. When such a guide part 120 is formed, the cross section of the sealed container 100 is gradually narrowed when the extraction part 102 is extracted, so that resistance is low, a smooth extraction operation can be performed, and adhesion of the developer G can be reduced. it can.

引き抜き部102を引き抜いて容器内の現像剤Gが現像装置9内に放出されると、放出された現像剤Gが、封入容器100の表面に付着し、場合によっては引き抜き穴110,111を通過してハウジング外部に出てしまうことも想定される。   When the drawing portion 102 is pulled out and the developer G in the container is discharged into the developing device 9, the released developer G adheres to the surface of the sealed container 100, and in some cases, passes through the drawing holes 110 and 111. Then, it is assumed that it goes out of the housing.

このため、図14に示すように引き抜き穴110,111の周部に磁性部材となる例えば磁石130を配置してもよい。磁石130の配置場所としては、図14(a)に示すようにガイド部120内、図14(b)に示すように、ガイド部120を備えていない場合は壁部32Aの内面32Bで引き抜き穴110,111と同心円状に、あるいは図14(c)に示すように、壁部32Aの外面32C側で引き抜き穴110,111よりも下部が挙げられる。   For this reason, as shown in FIG. 14, you may arrange | position the magnet 130 used as a magnetic member in the periphery of the extraction holes 110 and 111, for example. The magnet 130 is disposed in the guide portion 120 as shown in FIG. 14A, or in the inner surface 32B of the wall portion 32A when the guide portion 120 is not provided as shown in FIG. 14B. As shown in FIG. 14 (c), concentric with 110 and 111, or on the outer surface 32C side of the wall portion 32A, a lower portion than the extraction holes 110 and 111 may be mentioned.

このように、引き抜き穴110,111の周部に磁石130を配置すると、引き抜き穴110,111を通過した現像剤Gを磁石130の磁力によって引き付けることができ、現像剤Gによる現像装置9周辺の汚れや作業者の手の汚れを少なくあるいは無くすことができる。また、磁石130を配置することで、引き抜き部102(封入容器100)を現像装置9外に引き抜く際に、引き抜き穴110,111を通過して現像装置外部に引きずられて排出される現像剤Gを低減あるいは無くすことができ、現像剤Gを効率よく現像装置9内に放出することができる。   As described above, when the magnets 130 are arranged around the extraction holes 110 and 111, the developer G that has passed through the extraction holes 110 and 111 can be attracted by the magnetic force of the magnets 130, and the developer G around the developing device 9 can be attracted. Dirt and dirt on the hands of workers can be reduced or eliminated. In addition, by arranging the magnet 130, when the extraction portion 102 (encapsulation container 100) is extracted outside the developing device 9, the developer G passes through the extraction holes 110 and 111 and is dragged out of the developing device and discharged. Can be reduced or eliminated, and the developer G can be efficiently discharged into the developing device 9.

引き抜き部102を引っ張る際の抵抗により、封入部材100が破断部101と異なる部位で破れてちぎれてと舞うことも想定されるため、図15に示すように、封入部材100に、引き抜き方向に延在し、その一部が引き吹き部102まで達する補強部材117を設けてもよい。補強部材117は、封入容器100の長手方向外壁に沿って、封入容器100の材質よりも強度の高い材質の別部材を貼り付けて構成している。無論、封入容器100形成する際に、袋部分と補強部分とで強度を代えて一体的に形成してもよい。   Since it is assumed that the encapsulating member 100 may be broken and torn at a site different from that of the fractured portion 101 due to the resistance when pulling the extraction portion 102, the encapsulating member 100 extends in the extraction direction as shown in FIG. There may be provided a reinforcing member 117, part of which reaches the blowing part 102. The reinforcing member 117 is configured by attaching another member having a higher strength than the material of the enclosure 100 along the outer wall in the longitudinal direction of the enclosure 100. Of course, when forming the enclosure 100, the bag portion and the reinforcing portion may be formed integrally with different strengths.

このような補強部材117を封入容器100に設けることで、封入容器100の強度を上げると同時に、封入部材100を引き抜く過程で封入容器が破断部101以外で破損して封入容器100が現像装置9内に在留するのを防ぐことができる。   By providing such a reinforcing member 117 in the sealed container 100, the strength of the sealed container 100 is increased, and at the same time, the sealed container is damaged in the process of pulling out the sealed member 100, and the sealed container 100 is developed by the developing device 9. Staying inside can be prevented.

上記形態において、封入容器100が一体化された現像剤搬送部材を装着する、あるいは適用可能な現像装置としては、図3,図4に示すように、供給スクリュー部材36と回収スクリュー部材38が上下に配置され、供給スクリュー部材36と回収スクリュー部材38の中間部分に現像ローラ34を配置した現送装置9に限定されるものではない。   In the above embodiment, as a developing device to which the developer conveying member integrated with the sealed container 100 is attached or applicable, as shown in FIGS. 3 and 4, the supply screw member 36 and the recovery screw member 38 are vertically moved. However, the present invention is not limited to the present feeding device 9 in which the developing roller 34 is disposed in an intermediate portion between the supply screw member 36 and the recovery screw member 38.

例えば図16、図17に示すように、供給スクリュー部材36と回収スクリュー部材38とが斜めに配置されていて、回収スクリュー部材38の上部に現像ローラ34が配置された現像装置9Aに適用してもよい。この場合、現像ローラ34と反対側に位置する現像ハウジング321の補給口321Aに引き抜き穴110,111を形成し、各引き抜き穴からそれぞれ引き抜き部102,102をそれぞれハウジング外部へ露呈させ、現像ローラ34と反対側に引き抜くようにしてもよい。あるいは、図18に示すように、供給スクリュー部材36の引き抜き部102と回収スクリュー部材38の引き抜き部102を挿通させる引き抜き部110,111をそれぞれ異なる方向に位置するように現像ハウジング321の補給口321Aに形成し、各引き抜き部102の引き抜き方向を異なる方向としてもよい。   For example, as shown in FIGS. 16 and 17, the supply screw member 36 and the recovery screw member 38 are disposed obliquely, and the present invention is applied to the developing device 9A in which the developing roller 34 is disposed above the recovery screw member 38. Also good. In this case, extraction holes 110 and 111 are formed in the replenishment port 321A of the development housing 321 located on the opposite side of the development roller 34, and the extraction portions 102 and 102 are respectively exposed to the outside of the housing from the respective extraction holes. You may make it pull out to the opposite side. Alternatively, as shown in FIG. 18, the replenishing port 321A of the developing housing 321 is positioned so that the extraction portions 110 and 111 through which the extraction portion 102 of the supply screw member 36 and the extraction portion 102 of the recovery screw member 38 are inserted are located in different directions. The pulling directions of the pulling portions 102 may be different directions.

封入容器100は、全ての現像剤搬送部材に装着する必要はなく、1つの封入容器100で現像剤Gの容量を確保できるのであれば、図19に示すように、複数の現像剤搬送部材の1本にだけ装着した形態であってもよい。図19は、供給スクリュー部材36のみに封入容器100を一体的にした形態を示す。   The enclosing container 100 does not need to be attached to all the developer conveying members, and as long as the capacity of the developer G can be secured by one enclosing container 100, as shown in FIG. The form attached to only one may be sufficient. FIG. 19 shows a form in which the enclosure 100 is integrated with only the supply screw member 36.

現像装置及びプロセスカートリッジの形態としては、図20に示すものであってもよい。図20に示すプロセスカートリッジ300の構成について簡単に述べると、感光体3a等が装着された感光体ハウジング31と、現像装置9Bを構成する各種部品が装着された現像ハウジング32とを有する。感光体ハウジング31と現像ハウジング32は、組付け・分離可能に構成されている。
現像ハウジング32には、現像像担持体となる現像ローラ115と、これと対向配置されたドクターブレード116と、2つに仕切られた収容槽117と、現像剤搬送部であり現像剤攪拌部材としての一対の攪拌スクリュー118とを備えている。一対の攪拌スクリュー118は、それぞれ収容槽117に水平方向に隣接して配置されていて、互いの異なる方向に回転することで現像剤を軸方向に搬送するとともに、一方の攪拌スクリュー118は現像ローラ115に、現像剤を供給する。
The form of the developing device and the process cartridge may be as shown in FIG. The configuration of the process cartridge 300 shown in FIG. 20 will be briefly described. The process cartridge 300 includes a photoconductor housing 31 to which the photoconductor 3a and the like are mounted, and a developing housing 32 to which various components constituting the developing device 9B are mounted. The photoconductor housing 31 and the developing housing 32 are configured to be assembled and separated.
In the developing housing 32, a developing roller 115 serving as a developed image carrier, a doctor blade 116 disposed opposite to the developing roller 115, a housing tank 117 partitioned into two parts, a developer conveying unit and a developer stirring member And a pair of stirring screws 118. The pair of stirring screws 118 are respectively disposed adjacent to the storage tank 117 in the horizontal direction, and rotate in different directions to convey the developer in the axial direction. A developer is supplied to 115.

本発明は、このようなプロセスカートリッジ300や現像装置9Bに適用することもできる。この形態では攪拌スクリュー118,118に封入容器100をそれぞれ巻き付けて一体化し、現像装置9Bの現像ハウジング322であって、現像ローラ115と反対側に位置する壁部322Aに2つの封入容器100からそれぞれ延びる引き抜き部102を挿通する引き抜き穴110,111を形成し、これら引き抜き穴110,111に引き抜き部102をそれぞれ挿通させてハウジング外部に露呈して同一方向から引き抜き可能としている。   The present invention can also be applied to such a process cartridge 300 and the developing device 9B. In this embodiment, the enclosing containers 100 are wound around and integrated with the stirring screws 118, 118, respectively. The developing housing 322 of the developing device 9 </ b> B is provided on the wall portion 322 </ b> A opposite to the developing roller 115 from the two enclosing containers 100. Pull-out holes 110 and 111 through which the extending pull-out portion 102 is inserted are formed, and the pull-out portions 102 are respectively inserted into the pull-out holes 110 and 111 so as to be exposed to the outside of the housing so that they can be pulled out from the same direction.

図21は、現像装置9Bの現像ハウジング322の互いに対極に位置する壁部322A,322Bに引き抜き穴110,111をそれぞれ形成し、各引き抜き部102をそれぞれ挿通させてハウジング外部に露呈して異なる方向から引き抜き可能としている。   FIG. 21 shows the different directions in which the drawing holes 110 and 111 are formed in the wall portions 322A and 322B located opposite to each other of the developing housing 322 of the developing device 9B, respectively, and each drawing portion 102 is inserted and exposed to the outside of the housing. It can be pulled out from.

このように本発明は現像剤搬送部材を備えた様々な形式の現像装置に対して適用することができ、各現像装置においても、上述した効果と同様の効果を得ることができる。   As described above, the present invention can be applied to various types of developing devices including a developer conveying member, and each developing device can obtain the same effects as those described above.

3a〜3d 像担持体
9,9A,9B 現像装置
30a〜30d プロセスカートリッジ
31 像担持体ハウジング
32 ハウジング
32A,321A,322A ハウジングの壁面
34 現像剤担持体
36,38 現像剤搬送部材
36A,38A スクリュー間
36B,38B 空間
36C,38C 回転軸
36Ca,36Cb 現像剤搬送部の両端
38Ca,38Cb 現像剤搬送部の両端
100 袋部材
100A,100B 袋部材の両端
101 破断部
102 引き抜き部
103,106 引っ掛け部
117 補強部材
110,111 引き抜き穴
130 磁性部材
G 現像剤
3a to 3d Image carrier 9, 9A, 9B Developing device 30a to 30d Process cartridge 31 Image carrier housing 32 Housing 32A, 321A, 322A Housing wall surface 34 Developer carrier 36, 38 Developer conveying member 36A, 38A Between screws 36B, 38B Space 36C, 38C Rotating shaft 36Ca, 36Cb Both ends of developer transport section 38Ca, 38Cb Both ends of developer transport section 100 Bag member 100A, 100B Both ends of bag member 101 Breaking section 102 Pull-out section 103, 106 Hook section 117 Reinforcement Member 110, 111 Pull-out hole 130 Magnetic member G Developer

特開平11−174810号公報Japanese Patent Laid-Open No. 11-174810 特開平05−333691JP 05-333691

Claims (12)

スクリュー部材で構成された現像剤搬送部材であって、
現像剤を内部に封入された可塑性を有する袋部材が、前記スクリュー部材のスクリュー間に形成される空間内に巻き付けられて一体的に装着されていることを特徴とする現像剤搬送部材。
A developer conveying member composed of a screw member,
A developer conveying member, wherein a plastic bag member having a developer sealed therein is wound around and integrally mounted in a space formed between the screws of the screw member.
前記袋部材は、前記現像剤搬送部材の両端に、その両端側が係止されて装着されていることを特徴とする請求項1記載の現像剤搬送部材。   The developer conveying member according to claim 1, wherein the bag member is attached to both ends of the developer conveying member so that both ends thereof are locked. 現像剤を内部に封入された可塑性を有する袋部材の外部にあり、当該袋部材が一体的に装着された現像剤搬送部材であって、
前記袋部材は、前記現像剤搬送部材の回転軸の両端に、その両端側を掛け渡すように係止されて装着されていることを特徴とする現像剤搬送部材。
A developer conveying member that is external to the plastic bag member encapsulating the developer inside and the bag member is integrally mounted;
The developer conveying member, wherein the bag member is fixedly attached to both ends of a rotation shaft of the developer conveying member so as to span both ends thereof.
現像剤担持体と、前記現像剤担持体を支持するハウジングと、前記ハウジング内において回転することで現像剤を搬送可能な少なくとも1つの現像剤搬送部材とを備え、
前記現像剤搬送部材が請求項1ないし3の何れか1つに記載の現像剤搬送部材であることを特徴とする現像装置。
A developer carrying member, a housing that supports the developer carrying member, and at least one developer carrying member capable of carrying the developer by rotating in the housing;
The developing device according to claim 1, wherein the developer conveying member is a developer conveying member according to claim 1.
前記袋部材には、作業者に把持される引き抜き部と、前記袋部材中の現像剤を封入する部分を横断するように設けられ、前記引き抜き部への引き抜き動作に応じて破れる破断部とを有し、
前記ハウジングは、前記引き抜き部を前記ハウジング外部に露呈させる引き抜き穴が形成されていることを特徴する請求項4記載の現像装置。
The bag member includes an extraction portion that is gripped by an operator, and a break portion that is provided so as to traverse a portion of the bag member that encloses the developer and is torn in response to an extraction operation to the extraction portion. Have
The developing device according to claim 4, wherein the housing is formed with an extraction hole for exposing the extraction portion to the outside of the housing.
前記袋部材は、前記破断部を境に前記引き抜き部と反対側に引っ掛け部が設けられ、
前記引っ掛け部は、前記現像剤搬送部材の回転軸に引っ掛けられていることを特徴とする請求項5記載の現像装置。
The bag member is provided with a hook portion on the opposite side of the pull-out portion with the break portion as a boundary,
The developing device according to claim 5, wherein the hook portion is hooked on a rotation shaft of the developer conveying member.
前記引き抜き穴は、前記現像剤搬送部材を境にして現像剤担持体と反対側の前記ハウジングの壁面に設けられていることを特徴とする請求項5または6記載の現像装置。   The developing device according to claim 5, wherein the drawing hole is provided in a wall surface of the housing opposite to the developer carrying member with the developer conveying member as a boundary. 前記引き抜き穴の大きさは、前記現像剤が封入された状態の前記袋部材を横断する方向の断面積よりも小さく形成されていることを特徴とする請求項5ないし7の何れか1つに記載の現像装置。   The size of the drawing hole is smaller than a cross-sectional area in a direction crossing the bag member in a state where the developer is sealed. The developing device described. 前記引き抜き穴の周部に磁性部材を配置したことを特徴とする請求項5ないし8の何れか1つに記載の現像装置。   The developing device according to claim 5, wherein a magnetic member is disposed on a peripheral portion of the drawing hole. 前記袋部材は、引き抜き方向に延在し、その一部が前記引き抜き部まで達する補強部材を有することを特徴とする請求項5ないし9の何れか1つに記載の現像装置。   The developing device according to claim 5, wherein the bag member includes a reinforcing member that extends in a drawing direction and a part of the bag member reaches the drawing portion. 請求項4ないし6の何れか1つに記載の現像装置と、少なくとも像担持体を回転可能に保持する像担持体ハウジングとを一体にしたことを特徴とするプロセスカートリッジ。   7. A process cartridge comprising: the developing device according to claim 4; and an image carrier housing that rotatably holds at least the image carrier. 請求項請求項4ないし6の何れか1つに記載の現像装置又は請求項7に記載のプロセスカートリッジを備えたことを特徴とする画像形成装置。   An image forming apparatus comprising the developing device according to any one of claims 4 to 6 or the process cartridge according to claim 7.
JP2010026851A 2010-02-09 2010-02-09 Developer conveying member, developing device, process cartridge, and image forming apparatus including the same Expired - Fee Related JP5663888B2 (en)

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