JP5861489B2 - Developer container, developing device, process cartridge, and image forming apparatus - Google Patents

Developer container, developing device, process cartridge, and image forming apparatus Download PDF

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JP5861489B2
JP5861489B2 JP2012031060A JP2012031060A JP5861489B2 JP 5861489 B2 JP5861489 B2 JP 5861489B2 JP 2012031060 A JP2012031060 A JP 2012031060A JP 2012031060 A JP2012031060 A JP 2012031060A JP 5861489 B2 JP5861489 B2 JP 5861489B2
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toner
rod
shaped member
discharge port
developing device
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JP2013167767A (en
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翔 釣谷
翔 釣谷
中武　直樹
直樹 中武
智広 久保田
智広 久保田
清水　義之
義之 清水
吉田　知史
知史 吉田
藤田　雅也
雅也 藤田
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Ricoh Co Ltd
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Ricoh Co Ltd
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Description

本発明は、現像剤容器、現像装置、プロセスカートリッジ及び画像形成装置に関する。   The present invention relates to a developer container, a developing device, a process cartridge, and an image forming apparatus.

電子写真方式を用いた画像形成装置の現像装置では、予め現像剤としてのトナーを内部に密封して収容するトナー容器を備えて構成されるものがある。トナー容器を備える現像装置は、使用開始時にトナー容器に設けられているトナーを密封するためのシール部材を剥がすこと等によってトナーが供給され、画像形成装置におけるトナー像の形成に使用される。   2. Description of the Related Art Some developing devices of an image forming apparatus using an electrophotographic system include a toner container that preliminarily seals and stores toner as a developer. A developing device including a toner container is supplied with toner by peeling off a sealing member for sealing the toner provided in the toner container at the start of use, and is used for forming a toner image in the image forming apparatus.

ここで、現像装置とトナー容器とが一体化された現像ユニットでは、現像装置に供給されたトナーが消費されて無くなった（トナーエンド）時に、現像装置を含む現像ユニット単位で新品に交換される。しかし、この様な現像ユニット単位での交換は、トナーエンド時においても継続使用が可能な現像装置の各部品を含めて交換することとなり、画像形成にかかるコストが上昇するため好ましくない。   Here, in the developing unit in which the developing device and the toner container are integrated, when the toner supplied to the developing device is consumed and is lost (toner end), the developing unit including the developing device is replaced with a new one. . However, such replacement in units of development units is not preferable because it includes replacement of each part of the developing device that can be continuously used even when the toner is exhausted, and the cost for image formation increases.

そこで、例えば特許文献１には、現像装置に着脱可能で、トナーを現像装置に供給した後は容器部の容積が縮小するトナー容器が開示されている。当該トナー容器を備える現像装置では、トナーエンド時にトナー容器を交換するだけで画像形成を再開可能であり、さらにトナー供給後に容器部が減容するため装置を小型化することが可能である。   Thus, for example, Patent Document 1 discloses a toner container that can be attached to and detached from the developing device, and the volume of the container portion is reduced after the toner is supplied to the developing device. In the developing device including the toner container, image formation can be resumed by simply replacing the toner container at the time of toner end, and the apparatus can be reduced in size because the volume of the container is reduced after the toner is supplied.

特許文献１に係るトナー容器では、トナー容器及び現像装置の双方に大きな開口部を設けて連結し、上方に設置したトナー容器からトナーの自重により下方に設置した現像装置に開口を介してトナーの供給を行う。この様にトナー容器から現像装置に大きな開口部を介してトナーを供給する構成では、トナー供給時に大量のトナーが現像装置に流れ込むことにより、現像装置からトナー飛散が起こり易いという問題がある。そこで、トナー容器と現像装置との間でトナーの供給を行う開口部の面積を小さくすることが考えられるが、開口部においてトナー詰まりが生じて現像装置へのトナー供給に支障が生じる場合がある。   In the toner container according to Patent Document 1, a large opening is provided and connected to both the toner container and the developing device, and the toner container is placed from above to the developing device installed below due to the weight of the toner. Supply. As described above, in the configuration in which toner is supplied from the toner container to the developing device through a large opening, there is a problem that a large amount of toner flows into the developing device when the toner is supplied, so that the toner is easily scattered from the developing device. Therefore, it is conceivable to reduce the area of the opening for supplying toner between the toner container and the developing device. However, toner clogging may occur in the opening, which may hinder the toner supply to the developing device. .

そこで、例えば特許文献２には、トナー容器に空気を流入してトナーを流動化させ、流動化されたトナーを流入した空気の圧力により現像装置にトナーを供給する剤移送方法が開示されている。当該剤移送方法によれば、トナー容器内のトナーを流動化させることで現像装置へのトナー供給を容易に行うことが可能となる。   Therefore, for example, Patent Document 2 discloses an agent transfer method in which air is introduced into a toner container to fluidize the toner, and the toner is supplied to the developing device by the pressure of the air into which the fluidized toner has entered. . According to the agent transfer method, toner can be easily supplied to the developing device by fluidizing the toner in the toner container.

しかしながら、特許文献２に係る剤移送方法では、トナー容器とは別にトナー容器に空気を供給して流入させるための空気供給手段が必要となり、コスト増になると共に構成が複雑化する可能性がある。   However, the agent transfer method according to Patent Document 2 requires an air supply means for supplying air to the toner container separately from the toner container, which may increase the cost and complicate the configuration. .

本発明は上記に鑑みてなされたものであって、簡易な構成で、現像剤の詰まりや飛散を起こさずに現像剤を供給することが可能な現像剤容器を提供することを目的とする。   The present invention has been made in view of the above, and an object thereof is to provide a developer container capable of supplying a developer with a simple configuration without causing clogging or scattering of the developer.

本発明の一態様によれば、内部に現像剤を収容し、一方向に伸縮する現像剤容器であって、伸縮方向の一方側に設けられ、前記現像剤が排出される排出口と、前記伸縮方向の他方側の内面から前記排出口に向けて設けられ、前記現像剤容器の伸縮に伴って、前記排出口側の端部が前記排出口より外側の位置と前記現像剤容器内部の位置との間を前記伸縮方向に移動する棒状部材と、を備え、前記棒状部材は、前記排出口側の端部が前記排出口に向けて先細りする形状である。


According to one aspect of the present invention, a developer container that accommodates a developer therein and expands and contracts in one direction, provided on one side of the expansion and contraction direction, and a discharge port for discharging the developer, Provided from the inner surface on the other side in the expansion / contraction direction toward the discharge port, and with the expansion / contraction of the developer container, the end on the discharge port side is positioned outside the discharge port and the position inside the developer container and a rod-shaped member that moves in the stretching direction between said rod-like member has a shape in which the end portion of the discharge port side is tapered toward the discharge port.


本発明の実施形態によれば、簡易な構成で、現像剤の詰まりや飛散を起こさずに現像剤を供給することが可能な現像剤容器を提供できる。   According to the embodiment of the present invention, it is possible to provide a developer container capable of supplying a developer with a simple configuration without causing clogging or scattering of the developer.

第１の実施形態に係る画像形成装置の構成例を示す概略図である。1 is a schematic diagram illustrating a configuration example of an image forming apparatus according to a first embodiment. 第１の実施形態に係る現像装置の構成例を示す概略図である。1 is a schematic diagram illustrating a configuration example of a developing device according to a first embodiment. 第１の実施形態に係るトナー容器の外観斜視図である。FIG. 2 is an external perspective view of a toner container according to the first embodiment. 第１の実施形態に係るトナー容器を例示する断面概略図である。3 is a schematic cross-sectional view illustrating the toner container according to the first embodiment. FIG. 第１の実施形態に係るトナー容器のトナー排出動作例を説明する図である。FIG. 6 is a diagram illustrating an example of a toner discharge operation of the toner container according to the first embodiment. 第２の実施形態に係るトナー容器を例示する断面概略図である。6 is a schematic cross-sectional view illustrating a toner container according to a second embodiment. FIG. 第２の実施形態に係るトナー容器の棒状部材及び支持部材の構成を例示する部分拡大図である。6 is a partially enlarged view illustrating the configuration of a rod-like member and a support member of a toner container according to a second embodiment. FIG. 第３の実施形態に係るトナー容器を例示する断面概略図FIG. 6 is a schematic cross-sectional view illustrating a toner container according to a third embodiment. 第３の実施形態に係るトナー容器の棒状部材及び支持部材の構成を例示する部分拡大図である。FIG. 10 is a partial enlarged view illustrating the configuration of a rod-like member and a support member of a toner container according to a third embodiment.

以下、図面を参照して発明を実施するための形態について説明する。各図面において、同一構成部分には同一符号を付し、重複した説明を省略する場合がある。   Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals, and redundant description may be omitted.

［第１の実施形態］
＜画像形成装置の構成＞
図１は、第１の実施形態に係る画像形成装置１００の構成例を示す概略図である。 [First Embodiment]
<Configuration of image forming apparatus>
FIG. 1 is a schematic diagram illustrating a configuration example of an image forming apparatus 100 according to the first embodiment.

図１に示す様に、画像形成装置１００は、感光体ドラム２、帯電ローラ３、現像装置４、クリーニングブレード５、露光装置７、転写ベルト１０、２次転写ローラ１２、定着装置１６等を備える。なお、第１の実施形態に係る画像形成装置１００は、異なる色のトナー像を形成する現像装置４等を含む現像部を複数併設したタンデムタイプのカラープリンタであるが、図１に示す構成にスキャナ等を組み合わせたカラー複合機、若しくは黒色画像を形成する１つの現像部で構成したモノクロプリンタやモノクロ複合機等であっても良い。   As shown in FIG. 1, the image forming apparatus 100 includes a photosensitive drum 2, a charging roller 3, a developing device 4, a cleaning blade 5, an exposure device 7, a transfer belt 10, a secondary transfer roller 12, a fixing device 16, and the like. . The image forming apparatus 100 according to the first embodiment is a tandem type color printer including a plurality of developing units including the developing device 4 that forms toner images of different colors, but has a configuration illustrated in FIG. It may be a color complex machine combined with a scanner or the like, or a monochrome printer or monochrome complex machine configured with one developing unit for forming a black image.

画像形成装置１００における画像形成動作について説明する。   An image forming operation in the image forming apparatus 100 will be described.

まず、回転駆動する感光体ドラム２の表面を帯電ローラ３が所定電位に帯電させ、露光装置７が入力された画像信号に基づいて変調された光Ｌで帯電された感光体ドラム２の表面を露光し、感光体ドラム２の表面に画像信号に対応した静電潜像を形成する。   First, the surface of the photosensitive drum 2 that is driven to rotate is charged by the charging roller 3 to a predetermined potential, and the surface of the photosensitive drum 2 that is charged with the light L that is modulated based on the input image signal by the exposure device 7. Exposure is performed to form an electrostatic latent image corresponding to the image signal on the surface of the photosensitive drum 2.

次に、内部に現像剤としてのトナーを収容する現像装置４が、感光体ドラム２に形成された静電潜像にトナーを付着させることでトナー像を形成する。感光体ドラム２の表面に形成されたトナー像は、駆動ローラ８によって図中矢印Ａ方向に回転駆動する転写ベルト１０の表面に他色のトナー像と重ねて転写され、フルカラートナー像が形成される。   Next, the developing device 4 that accommodates toner as a developer therein forms a toner image by attaching the toner to the electrostatic latent image formed on the photosensitive drum 2. The toner image formed on the surface of the photosensitive drum 2 is transferred onto the surface of the transfer belt 10 that is rotationally driven in the direction of arrow A in the drawing by the driving roller 8 so as to be superimposed on the other color toner image to form a full color toner image. The

一方、用紙トレイ１３に収納されている記録媒体Ｓは、駆動ローラ８と２次転写ローラ１２との間の２次転写部に向けて搬送され、２次転写部において転写ベルト１０に１次転写されたフルカラートナー像が転写される。表面にトナー像を載せた記録媒体Ｓは、さらに搬送されて定着装置１６にて熱と圧力を加えられることで表面にトナー像が定着される。トナー像が定着された記録媒体Ｓは、排紙ローラ１９により搬送されて機外の排紙トレイ２０にスタックされる。   On the other hand, the recording medium S stored in the paper tray 13 is conveyed toward the secondary transfer portion between the drive roller 8 and the secondary transfer roller 12 and is primarily transferred to the transfer belt 10 in the secondary transfer portion. The full color toner image is transferred. The recording medium S on which the toner image is placed on the surface is further conveyed and the toner image is fixed on the surface by applying heat and pressure by the fixing device 16. The recording medium S on which the toner image is fixed is conveyed by the paper discharge roller 19 and stacked on a paper discharge tray 20 outside the apparatus.

表面に形成されたトナー像を転写ベルト１０に転写した感光体ドラム２は、さらに回転して表面に付着する転写残トナーがクリーニングブレード５によって除去される。また、転写ベルト１０上の転写残トナーもクリーナ２１によって除去されて、感光体ドラム２と共に次回の画像形成に供される。画像形成装置１００では、以上のプロセスを経て記録媒体Ｓの表面に画像形成を行う。   The photosensitive drum 2 on which the toner image formed on the surface is transferred to the transfer belt 10 is further rotated and the transfer residual toner adhering to the surface is removed by the cleaning blade 5. Further, the transfer residual toner on the transfer belt 10 is also removed by the cleaner 21 and used for the next image formation together with the photosensitive drum 2. The image forming apparatus 100 forms an image on the surface of the recording medium S through the above process.

＜現像装置の構成＞
図２は、第１の実施形態に係る現像装置４の構成例を示す概略図である。 <Configuration of developing device>
FIG. 2 is a schematic diagram illustrating a configuration example of the developing device 4 according to the first embodiment.

現像装置４は、現像ローラ４１、供給ローラ４２、規制部材４３、撹拌部材４４、トナー収容室４５、トナー供給口４６等を有し、トナー供給口４６に排出口５３が挿入された現像剤容器としてのトナー容器５０を備える。   The developing device 4 includes a developing roller 41, a supply roller 42, a regulating member 43, a stirring member 44, a toner storage chamber 45, a toner supply port 46, and the like, and a developer container in which a discharge port 53 is inserted into the toner supply port 46. The toner container 50 is provided.

現像ローラ４１は、金属製の芯金と、芯金の外周に体積抵抗値を調整した導電性ゴム（例えば導電性ウレタンゴムやシリコーンゴム等）とを有し、表面にトナーを担持して回転可能に設けられている。現像ローラ４１の芯金には不図示の電圧印加手段から所定の電圧が印加されて感光体ドラム２との間で電界を形成し、表面に担持したトナーを感光体ドラム２に形成された静電潜像に付着させる。   The developing roller 41 has a metal core and conductive rubber (for example, conductive urethane rubber, silicone rubber, etc.) whose volume resistance value is adjusted on the outer periphery of the core, and rotates while carrying toner on the surface. It is provided as possible. A predetermined voltage is applied from a voltage application unit (not shown) to the core of the developing roller 41 to form an electric field with the photosensitive drum 2, and the toner carried on the surface is formed on the photosensitive drum 2. Adhere to the electrostatic latent image.

供給ローラ４２は、例えば金属製の芯金の外周に、カーボンを混合させることで半導電化させた発泡ポリウレタンを付着させたスポンジローラ等であり、回転可能に設けられてトナーを現像ローラ４１に供給する。   The supply roller 42 is a sponge roller or the like in which foamed polyurethane made semiconductive by mixing carbon is attached to the outer periphery of a metal core, for example, and is rotatably provided so that toner is supplied to the developing roller 41. Supply.

規制部材４３は、例えば板厚0.1mm程度のＳＵＳ等の金属板であり、現像ローラ４１に当接することで現像ローラ４１上のトナーを薄層化してトナー量の調整を行う。現像ローラ４１上のトナー量の調整は、現像特性を安定させる上で極めて重要であり、規制部材４３の現像ローラ４１への当接圧（例えば20〜60N/m）、当接位置（例えば規制部材４３の先端から0.5±0.5ｍｍ程度）等が厳しく管理され、使用するトナー、現像ローラ４１、供給ローラ４２等の特性に併せて適宜決定される。   The restricting member 43 is a metal plate such as SUS having a thickness of about 0.1 mm, for example, and adjusts the toner amount by making the toner on the developing roller 41 thin by contacting the developing roller 41. The adjustment of the toner amount on the developing roller 41 is extremely important in stabilizing the development characteristics, and the contact pressure (for example, 20 to 60 N / m) of the regulating member 43 to the developing roller 41 and the contact position (for example, the regulation) (About 0.5 ± 0.5 mm from the tip of the member 43) is strictly controlled, and is appropriately determined in accordance with the characteristics of the toner to be used, the developing roller 41, the supply roller 42, and the like.

現像装置４は、トナー収容室４５に現像剤としてのトナーを収容しており、撹拌部材４４がトナーを撹拌し、撹拌されたトナーが供給ローラ４２によって現像ローラ４１に供給される。   The developing device 4 stores toner as a developer in a toner storage chamber 45, the stirring member 44 stirs the toner, and the stirred toner is supplied to the developing roller 41 by the supply roller 42.

トナー容器５０は、排出口５３が現像装置４のトナー供給口４６に着脱可能に連結し、内部に収容しているトナーを現像装置４に供給する。トナー容器５０は、収容していたトナーを現像装置４に供給した後、現像装置４内のトナーが消費されて不図示のセンサにより一定量以下になったことが検知されたトナーエンド時に、トナーが充填されたトナー容器５０'に交換される。現像装置４は、交換されたトナー容器５０'から再度トナーの供給を受けることで、画像形成装置１００において画像形成を継続して行うことが可能になる。   In the toner container 50, the discharge port 53 is detachably connected to the toner supply port 46 of the developing device 4, and supplies the toner contained therein to the developing device 4. The toner container 50 supplies the toner contained therein to the developing device 4, and then the toner is detected when the toner in the developing device 4 is consumed and the amount of toner is detected to be below a predetermined amount by a sensor (not shown). Is replaced with a toner container 50 ′ filled with the toner. The developing device 4 can continuously perform image formation in the image forming apparatus 100 by receiving the toner supply again from the replaced toner container 50 ′.

この様に、トナー容器５０を現像装置４に着脱可能に設けて適宜交換して現像装置４にトナーを供給することで、現像ローラ４１や供給ローラ４２等が寿命に達するまで長期間に渡って現像装置４を使用可能になる。したがって、現像装置４及びトナー容器５０が一体化した現像ユニット単位で交換する場合に比べて、画像形成装置１００を使用するユーザにとっての部品交換コスト及びランニングコストを低減することができる。   As described above, the toner container 50 is detachably provided on the developing device 4 and is appropriately replaced to supply the toner to the developing device 4, so that the developing roller 41, the supply roller 42, etc. reach the end of their life for a long period of time. The developing device 4 can be used. Therefore, compared with the case where the developing device 4 and the toner container 50 are replaced in units of integrated developing units, the part replacement cost and the running cost for the user who uses the image forming apparatus 100 can be reduced.

なお、現像装置４がトナー容器５０を備える構成について例示したが、トナー容器５０を着脱可能に備える現像装置４と、感光体ドラム２と、帯電ローラ３等を一体に構成し、画像形成装置１００に着脱可能なプロセスカートリッジとすることも可能である。   Although the configuration in which the developing device 4 includes the toner container 50 has been illustrated, the developing device 4 that includes the toner container 50 so as to be detachable, the photosensitive drum 2, the charging roller 3, and the like are integrally configured to form the image forming apparatus 100. It is also possible to use a process cartridge that is detachably attachable.

＜トナー容器の構成＞
図３は、第１の実施形態に係るトナー容器５０を例示する外観斜視図である。 <Configuration of toner container>
FIG. 3 is an external perspective view illustrating the toner container 50 according to the first embodiment.

図３に示す様に、トナー容器５０は、側壁の一部に形成された蛇腹状の伸縮部５２と、現像装置４のトナー供給口４６に挿入され、内部に収容したトナーを現像装置４に排出する排出口５３とを備えている。トナー容器５０は、押圧されて伸縮部５２が図中矢印Ｂ方向（以下、伸縮方向Ｂという）に繰り返し伸縮することでトナーを現像装置４に排出する。   As shown in FIG. 3, the toner container 50 is inserted into the bellows-like stretchable part 52 formed in a part of the side wall and the toner supply port 46 of the developing device 4, and the toner stored inside is supplied to the developing device 4. And a discharge port 53 for discharging. The toner container 50 is pressed, and the expansion / contraction part 52 repeatedly expands and contracts in the direction of arrow B (hereinafter referred to as expansion / contraction direction B) in the drawing, thereby discharging the toner to the developing device 4.

伸縮部５２は、伸縮方向Ｂに伸縮する構成であれば本実施形態に限るものではなく、例えば矢印Ｂ方向に伸縮する可撓性部材や弾性部材等を用いて蛇腹以外の構成にしても良い。   The expansion / contraction part 52 is not limited to the present embodiment as long as it is configured to expand / contract in the expansion / contraction direction B, and may be configured other than the bellows using, for example, a flexible member or an elastic member that expands / contracts in the arrow B direction. .

排出口５３は、トナー容器５０に収容されているトナーを現像装置４に排出するための開口部であり、現像装置４のトナー供給口４６に挿入される。排出口５３の開口部の大きさは、トナーが現像装置４に大量に流入してトナー飛散を起こすことが無い大きさに適宜設定することができる。   The discharge port 53 is an opening for discharging the toner contained in the toner container 50 to the developing device 4, and is inserted into the toner supply port 46 of the developing device 4. The size of the opening of the discharge port 53 can be appropriately set to a size that does not cause a large amount of toner to flow into the developing device 4 and cause toner scattering.

図４は、第１の実施形態に係るトナー容器５０を例示する断面概略図であり、図４（ａ）はトナー容器５０の通常状態を示し、図４（ｂ）はトナー容器５０が押圧されて縮小した状態を示している。   4 is a schematic cross-sectional view illustrating the toner container 50 according to the first embodiment. FIG. 4A illustrates a normal state of the toner container 50, and FIG. 4B illustrates the toner container 50 being pressed. Shows a reduced state.

トナー容器５０は、排出口５３と伸縮方向Ｂの反対側の内面から排出口５３に向けて設けられ、トナー容器５０の伸縮に伴って伸縮方向Ｂに移動する棒状部材５１を備えている。本実施形態における棒状部材５１は、伸縮方向Ｂに直交する断面が略円形の円柱状部材であるが、例えば断面が多角形状を有する角柱部材や、断面が不定形の柱状部材等であっても良い。   The toner container 50 is provided with a rod-like member 51 that is provided from the inner surface on the opposite side of the discharge port 53 to the expansion / contraction direction B toward the discharge port 53 and moves in the expansion / contraction direction B as the toner container 50 expands / contracts. The rod-shaped member 51 in the present embodiment is a columnar member having a substantially circular cross section orthogonal to the expansion / contraction direction B. For example, the rod member 51 may be a prismatic member having a polygonal cross section, a columnar member having an indefinite cross section, or the like. good.

また、棒状部材５１は、図４（ａ）に示す様に、排出口５３側の端部が先細りする形状（伸縮方向Ｂに直交する断面積Ｄが排出口に近い程小さい形状（Ｄ１＜Ｄ２））を有することが好ましい。この様な形状により、トナー容器５０の縮小時に、棒状部材５１が内部に収容するトナー層に侵入し易くなる。   Further, as shown in FIG. 4A, the rod-shaped member 51 has a shape in which the end portion on the discharge port 53 side tapers (a cross-sectional area D orthogonal to the expansion / contraction direction B is closer to the discharge port (D1 <D2). )). With such a shape, when the toner container 50 is reduced, the rod-shaped member 51 easily enters the toner layer accommodated therein.

さらに、図４（ｂ）に示す様に、棒状部材５１の伸縮方向Ｂの長さＬ１は、トナー容器５０の縮小時における排出口５３からトナー容器５０の棒状部材５１が設けられた内面位置までの長さＬ２よりも長いことが好ましい。トナー容器５０の縮小時に、棒状部材５１が排出口５３から露出することでトナーを排出し、トナー容器５０が通常状態に復帰する時にトナー層に空気流入孔を形成することが可能になる。   Further, as shown in FIG. 4B, the length L1 of the rod-shaped member 51 in the expansion / contraction direction B is from the discharge port 53 when the toner container 50 is reduced from the inner surface position where the rod-shaped member 51 of the toner container 50 is provided. It is preferable that it is longer than length L2. When the toner container 50 is contracted, the rod-shaped member 51 is exposed from the discharge port 53 to discharge the toner. When the toner container 50 returns to the normal state, an air inflow hole can be formed in the toner layer.

なお、トナー容器５０は、例えばブロー成型等によって棒状部材５１及び排出口５３と一体成型することが好ましい。棒状部材５１等と一体成型することで、部品点数を減らして製造コストを低減することができる。   The toner container 50 is preferably integrally formed with the rod-shaped member 51 and the discharge port 53 by, for example, blow molding. By integrally molding with the rod-shaped member 51 etc., the number of parts can be reduced and the manufacturing cost can be reduced.

図５は、第１の実施形態に係るトナー容器５０が、内部に収容するトナーを排出する動作を例示する図である。   FIG. 5 is a diagram illustrating an operation in which the toner container 50 according to the first embodiment discharges the toner accommodated therein.

図５（ａ）に示す様に、トナー容器５０は内部にトナー９０を収容しており、押圧されて伸縮部５２が縮小すると、棒状部材５１がトナー容器５０の縮小に伴って移動して排出口５３付近に存在していたトナー９０を外部に排出し、端部が排出口５３から露出する。   As shown in FIG. 5A, the toner container 50 contains toner 90 therein, and when the expansion / contraction part 52 is contracted by being pressed, the rod-shaped member 51 is moved and discharged as the toner container 50 is contracted. The toner 90 existing in the vicinity of the outlet 53 is discharged to the outside, and the end portion is exposed from the discharge port 53.

トナー容器５０は、縮小時にトナー９０を排出し（図５（ａ））、トナー容器５０にかけられていた押圧力から解放されると、伸縮部５２が元の状態に復帰する（図５（ｂ））。棒状部材５１は、トナー容器５０の伸縮部５２の伸張に伴い、排出口５３側の端部が再びトナー容器５０内に入る位置まで移動する。この時、棒状部材５１は、外部からトナー容器５０内に通じる空気流入孔７０をトナー９０に形成する。空気流入孔７０が形成されることでトナー容器５０内に外部の空気が流入し、その結果、トナー９０の排出量とトナー容器５０内に流入する空気量が安定し、トナー容器５０から現像装置４へのトナー補給作業を安定して行うことが可能になる。   When the toner container 50 is reduced, the toner 90 is discharged (FIG. 5A). When the toner container 50 is released from the pressing force applied to the toner container 50, the expandable portion 52 returns to the original state (FIG. 5B). )). The rod-like member 51 moves to a position where the end on the discharge port 53 side enters the toner container 50 again as the expansion / contraction part 52 of the toner container 50 extends. At this time, the rod-shaped member 51 forms an air inflow hole 70 in the toner 90 that communicates from the outside into the toner container 50. By forming the air inflow hole 70, external air flows into the toner container 50. As a result, the discharge amount of the toner 90 and the amount of air flowing into the toner container 50 are stabilized, and the developing device from the toner container 50 is stabilized. 4 can be stably performed.

第１の実施形態に係るトナー容器５０は、図５（ａ）及び（ｂ）に示す伸縮動作を繰り返すことによって、内部に収容したトナーを現像装置４に供給することができる。トナー容器５０から現像装置４へのトナー供給時には、棒状部材５１が排出口５３付近のトナー９０を外部に排出すると共に、トナー９０に空気流入孔７０を形成する。トナー容器５０からトナー９０が大量に現像装置４に排出されることが無いためトナー飛散を招くことがなく、排出口５３付近のトナーを押し出して空気流入孔７０を形成することでトナー詰まりを起こさずにトナー供給を行うことが可能である。   The toner container 50 according to the first embodiment can supply the toner accommodated therein to the developing device 4 by repeating the expansion and contraction operations shown in FIGS. When the toner is supplied from the toner container 50 to the developing device 4, the rod-shaped member 51 discharges the toner 90 near the discharge port 53 to the outside and forms an air inflow hole 70 in the toner 90. Since a large amount of toner 90 is not discharged from the toner container 50 to the developing device 4, toner scattering does not occur, and toner clogging occurs by pushing out the toner near the discharge port 53 to form the air inflow hole 70. It is possible to supply toner without using the toner.

［第２の実施形態］
次に、第２の実施形態について説明する。なお、第１の実施形態と同一構成部分についての説明は省略する。 [Second Embodiment]
Next, a second embodiment will be described. Note that description of the same components as those in the first embodiment is omitted.

図６に、第２の実施形態に係るトナー容器５０を例示する断面概略図を示す。   FIG. 6 is a schematic cross-sectional view illustrating a toner container 50 according to the second embodiment.

図６に示す様に、第２の実施形態に係るトナー容器５０は、棒状部材５１、伸縮部５２、排出口５３、支持部材５４を備える。   As shown in FIG. 6, the toner container 50 according to the second embodiment includes a rod-shaped member 51, a telescopic part 52, a discharge port 53, and a support member 54.

棒状部材５１は、トナー容器５０の排出口５３の伸縮方向Ｂの反対側の内面から排出口５３に向けて取り付けられ、回転軸５６の外周面に螺旋羽根５７を備えて回転可能に設けられている。   The rod-shaped member 51 is attached from the inner surface on the opposite side to the expansion / contraction direction B of the discharge port 53 of the toner container 50 toward the discharge port 53, and is provided rotatably with a spiral blade 57 on the outer peripheral surface of the rotating shaft 56. Yes.

支持部材５４は、螺旋羽根５７の一部に沿った形状を有して棒状部材５１を支持する様に、トナー容器５０の側壁に固定して設けられている。   The support member 54 is fixed to the side wall of the toner container 50 so as to support the rod-shaped member 51 having a shape along a part of the spiral blade 57.

図７に、第２の実施形態に係るトナー容器５０の棒状部材５１と支持部材５４の構成を例示する部分拡大図を示す。図７は、トナー容器５０の支持部材５４の位置における伸縮方向Ｂに直交する切断面を上面から見た図であり、棒状部材５１及び支持部材５４を拡大して示している。   FIG. 7 is a partial enlarged view illustrating the configuration of the rod-like member 51 and the support member 54 of the toner container 50 according to the second embodiment. FIG. 7 is a view of a cut surface orthogonal to the expansion / contraction direction B at the position of the support member 54 of the toner container 50 as viewed from above, and shows the rod-shaped member 51 and the support member 54 in an enlarged manner.

支持部材５４は、棒状部材５１の螺旋羽根５７の形状に沿う溝５５を有しており、溝５５に棒状部材５１の螺旋羽根５７が嵌る様に設けられている。   The support member 54 has a groove 55 that follows the shape of the spiral blade 57 of the rod-shaped member 51, and is provided so that the spiral blade 57 of the rod-shaped member 51 fits into the groove 55.

この様な構成においてトナー容器５０が縮小する際に、棒状部材５１は、トナー容器５０の縮小に伴って排出口５３の方向に移動すると共に、螺旋羽根５７が支持部材５４の溝５５に接触して押圧されることで、図６に示す矢印Ｃ方向に回転しながらトナー９０の中に侵入する。   In such a configuration, when the toner container 50 is reduced, the rod-like member 51 moves toward the discharge port 53 as the toner container 50 is reduced, and the spiral blade 57 contacts the groove 55 of the support member 54. By being pressed, the toner enters the toner 90 while rotating in the direction of arrow C shown in FIG.

棒状部材５１は、螺旋羽根５７を備えることで容易にトナー９０の中を掘り進むことができるため、過度な力を必要とせずにトナー容器５０の伸縮に伴ってトナー９０を排出すると共に空気流入孔７０を形成することが可能になる。トナー容器５０は、トナー９０を一度に大量に排出することが無いためトナー飛散を生じることなく、また、棒状部材５１が排出口５３付近のトナー９０を排出するためトナー詰まりを起こさずにトナー９０を現像装置４等に供給することができる。   Since the rod-like member 51 is provided with the spiral blade 57, the rod member 51 can easily dig into the toner 90, so that the toner 90 is discharged and the air inflow hole is not required when the toner container 50 is expanded and contracted. 70 can be formed. Since the toner container 50 does not discharge a large amount of toner 90 at a time, the toner 90 does not scatter, and the rod-like member 51 discharges the toner 90 in the vicinity of the discharge port 53, so that the toner 90 does not clog. Can be supplied to the developing device 4 or the like.

［第３の実施形態］
次に、第３の実施形態について説明する。なお、第１及び第２の実施形態と同一構成部分についての説明は省略する。 [Third Embodiment]
Next, a third embodiment will be described. The description of the same components as those in the first and second embodiments is omitted.

図８に、第３の実施形態に係るトナー容器５０を例示する断面概略図を示す。   FIG. 8 is a schematic cross-sectional view illustrating a toner container 50 according to the third embodiment.

図８に示す様に、第３の実施形態に係るトナー容器５０は、棒状部材５１、伸縮部５２、排出口５３、支持部材５４ａ，５４ｂを備える。   As shown in FIG. 8, the toner container 50 according to the third embodiment includes a rod-shaped member 51, a telescopic part 52, a discharge port 53, and support members 54 a and 54 b.

棒状部材５１は、回転軸５６の外周面に２つの螺旋羽根５７，５８を供える２条スクリュであり、トナー容器５０の排出口５３の伸縮方向Ｂの反対側の内面から排出口５３に向けて回転可能に設けられている。なお、棒状部材５１の回転軸５６には３つ以上の複数の螺旋羽根を設けても良い。   The rod-shaped member 51 is a two-thread screw that provides two spiral blades 57 and 58 on the outer peripheral surface of the rotating shaft 56, and faces the discharge port 53 from the inner surface on the opposite side of the discharge port 53 of the toner container 50 in the expansion / contraction direction B. It is provided so as to be rotatable. Note that three or more spiral blades may be provided on the rotation shaft 56 of the rod-shaped member 51.

支持部材５４ａ，５４ｂは、それぞれ螺旋羽根５７，５８に沿う形状を有して棒状部材５１を支持する様に、トナー容器５０の側壁に固定して設けられている。   The support members 54a and 54b have shapes along the spiral blades 57 and 58, respectively, and are fixed to the side wall of the toner container 50 so as to support the rod-shaped member 51.

図９に、第３の実施形態に係るトナー容器５０の棒状部材５１と支持部材５４ａ，５４ｂの構成を例示する部分拡大図を示す。図９は、トナー容器５０の支持部材５４ａ，５４ｂの位置における伸縮方向Ｂに直交する切断面を上面から見た図であり、棒状部材５１及び支持部材５４ａ，５４ｂを拡大して示している。   FIG. 9 is a partially enlarged view illustrating the configuration of the rod-like member 51 and the support members 54a and 54b of the toner container 50 according to the third embodiment. FIG. 9 is a top view of a cut surface perpendicular to the expansion / contraction direction B at the positions of the support members 54a and 54b of the toner container 50, and shows the rod-shaped member 51 and the support members 54a and 54b in an enlarged manner.

支持部材５４ａは、棒状部材５１の螺旋羽根５７の形状に沿う溝５５ａを有し、支持部材５４ｂは、棒状部材５１の螺旋羽根５８の形状に沿う溝５５ｂを有している。支持部材５４ａ，５４ｂのそれぞれの溝５５ａ，５５ｂには、棒状部材５１の螺旋羽根５７，５８が嵌る様に設けられている。   The support member 54 a has a groove 55 a that follows the shape of the spiral blade 57 of the rod-shaped member 51, and the support member 54 b has a groove 55 b that conforms to the shape of the spiral blade 58 of the rod-shaped member 51. The spiral blades 57 and 58 of the rod-shaped member 51 are provided in the grooves 55a and 55b of the support members 54a and 54b, respectively.

なお、支持部材５４ａ，５４ｂは、何れか一方のみで構成することもできるが、複数の支持部材５４を設け、伸縮方向Ｂにおいて同じ位置で対向する様に設置することが好ましい。複数の支持部材５４で棒状部材５１を挟み込む様に構成し、棒状部材５１の移動時における位置ずれを抑制することが可能になる。   The support members 54a and 54b can be configured by only one of them, but it is preferable to provide a plurality of support members 54 and to be opposed to each other at the same position in the expansion / contraction direction B. The rod-shaped member 51 is configured to be sandwiched between the plurality of support members 54, and it is possible to suppress a positional shift when the rod-shaped member 51 is moved.

この様な構成においてトナー容器５０が縮小する際に、棒状部材５１は、トナー容器５０の縮小に伴って排出口５３の方向に移動すると共に、螺旋羽根５７，５８がそれぞれ支持部材５４ａ，５４ｂの溝５５ａ，５５ｂに接触して押圧されることで、図８に示す矢印Ｄ方向に回転しながらトナー９０の中に侵入していくことになる。   In such a configuration, when the toner container 50 is contracted, the rod-shaped member 51 moves in the direction of the discharge port 53 as the toner container 50 is contracted, and the spiral blades 57 and 58 are respectively connected to the support members 54a and 54b. By contacting and pressing the grooves 55a and 55b, the toner enters the toner 90 while rotating in the direction of arrow D shown in FIG.

棒状部材５１は、螺旋羽根５７，５８を備えることでさらに容易にトナー９０の中を掘り進むことができるため、過度な力を必要とせずにトナー容器５０の伸縮に伴ってトナー９０を排出すると共に空気流入孔７０を形成することが可能になる。トナー容器５０は、トナー９０を一度に大量に排出することが無いためトナー飛散を生じることなく、また、棒状部材５１が排出口５３付近のトナー９０を排出するためトナー詰まりを起こさずにトナー９０を現像装置４等に供給することができる。   Since the rod-like member 51 is provided with the spiral blades 57 and 58, the rod-like member 51 can further easily dig into the toner 90, so that the toner 90 is discharged as the toner container 50 expands and contracts without requiring excessive force. The air inflow hole 70 can be formed. Since the toner container 50 does not discharge a large amount of toner 90 at a time, the toner 90 does not scatter, and the rod-like member 51 discharges the toner 90 in the vicinity of the discharge port 53, so that the toner 90 does not clog. Can be supplied to the developing device 4 or the like.

＜まとめ＞
以上で説明した様に、第１から第３の実施形態に係るトナー容器５０は、空気供給手段等を設けない簡易な構成で、トナー詰まり及びトナー飛散を招くことなく現像装置４等にトナーを供給することができる。なお、トナーを供給する対象は現像装置４だけでなく、トナーを収容するトナーカートリッジ等にトナーを供給する様に構成することもできる。 <Summary>
As described above, the toner container 50 according to the first to third embodiments has a simple configuration in which no air supply unit is provided, and the toner is supplied to the developing device 4 and the like without causing toner clogging and toner scattering. Can be supplied. Note that the toner can be supplied not only to the developing device 4 but also to a toner cartridge or the like that contains the toner.

また、本実施形態に係るトナー容器５０を備える現像装置４は、供給されたトナーを消費した場合にトナー容器５０を交換して再度トナーの供給を受けることで、引き続きトナー像の形成が可能になる。したがって、現像装置４が備える現像ローラ４１等の各部品が寿命に達するまで使用可能になり、現像装置４とトナー容器５０とが一体形成された現像ユニット単位で交換する場合に比べて、画像形成装置１００における画像形成にかかるランニングコストの低減を図ることができる。   Further, the developing device 4 including the toner container 50 according to the present embodiment can continuously form a toner image by replacing the toner container 50 and receiving the toner supply again when the supplied toner is consumed. Become. Therefore, each component such as the developing roller 41 provided in the developing device 4 can be used until the end of its life, and image formation is performed as compared with the case where the developing device 4 and the toner container 50 are replaced in units of a developing unit integrally formed. The running cost for image formation in the apparatus 100 can be reduced.

また、本実施形態に係るトナー容器５０を備える現像装置４を含み、画像形成装置１００に着脱可能なプロセスカートリッジでも、同様にトナー容器５０の交換のみで感光体ドラム等の各部品が寿命に達するまで使用可能になり、同様に画像形成装置１００における画像形成にかかるランニングコストを低減することができる。   Further, even in a process cartridge that includes the developing device 4 including the toner container 50 according to the present embodiment and is detachable from the image forming apparatus 100, each component such as the photosensitive drum reaches the end of its life by simply replacing the toner container 50. Similarly, the running cost for image formation in the image forming apparatus 100 can be reduced.

また、本実施形態に係るトナー容器５０を備える現像装置４を含む画像形成装置１００では、トナー容器５０の交換によりトナー飛散を招くことなく現像装置４へのトナー供給が可能であり、現像装置４等を継続使用することで部品交換にかかるコストを低減できる。   Further, in the image forming apparatus 100 including the developing device 4 including the toner container 50 according to the present embodiment, the toner can be supplied to the developing device 4 without causing toner scattering by replacing the toner container 50. The cost for replacing parts can be reduced by continuously using the above.

以上、本発明の実施形態について説明したが、上記実施形態に挙げた構成等に、その他の要素との組み合わせなど、ここで示した構成に本発明が限定されるものではない。これらの点に関しては、本発明の趣旨を逸脱しない範囲で変更することが可能であり、その応用形態に応じて適切に定めることができる。   Although the embodiments of the present invention have been described above, the present invention is not limited to the configurations shown here, such as combinations with other elements, etc., in the configurations described in the above embodiments. These points can be changed without departing from the spirit of the present invention, and can be appropriately determined according to the application form.

４ 現像装置
５０ トナー容器（現像剤容器）
５１ 棒状部材
５３ 排出口
５４ａ，５４ｂ 支持部材
５６ 回転軸
５７，５８ 螺旋羽根
９０ トナー（現像剤）
１００ 画像形成装置
Ｂ 伸縮方向 4 Developing device 50 Toner container (developer container)
51 Rod-shaped member 53 Discharge port 54a, 54b Support member 56 Rotating shaft 57, 58 Spiral blade 90 Toner (Developer)
100 Image forming apparatus B Stretch direction

特開平８−６２９６２号公報JP-A-8-62962 特開２０００−１４７８８４号公報Japanese Patent Laid-Open No. 2000-147484

Claims (8)

内部に現像剤を収容し、一方向に伸縮する現像剤容器であって、
伸縮方向の一方側に設けられ、前記現像剤が排出される排出口と、
前記伸縮方向の他方側の内面から前記排出口に向けて設けられ、前記現像剤容器の伸縮に伴って、前記排出口側の端部が前記排出口より外側の位置と前記現像剤容器内部の位置との間を前記伸縮方向に移動する棒状部材と、を備え、
前記棒状部材は、前記排出口側の端部が前記排出口に向けて先細りする形状である
ことを特徴とする現像剤容器。 A developer container that houses a developer and expands and contracts in one direction,
A discharge port provided on one side of the expansion and contraction direction and from which the developer is discharged;
Provided from the inner surface on the other side of the expansion / contraction direction toward the discharge port, and with the expansion / contraction of the developer container, the end portion on the discharge port side is located outside the discharge port and inside the developer container. A rod-shaped member that moves between the positions in the expansion and contraction direction ,
The developer container , wherein the rod-shaped member has a shape in which an end portion on the discharge port side is tapered toward the discharge port . 前記棒状部材の前記伸縮方向の長さは、前記現像剤容器の縮小時における前記内面の前記棒状部材が設けられた位置から前記排出口までの長さ以上である
ことを特徴とする請求項１に記載の現像剤容器。 2. The length of the rod-shaped member in the expansion / contraction direction is equal to or longer than the length from the position where the rod-shaped member is provided on the inner surface to the discharge port when the developer container is reduced. The developer container according to 1. 前記排出口及び前記棒状部材と一体成型される
ことを特徴とする請求項１又は２に記載の現像剤容器。 The outlet and the developer container according to claim 1 or 2, characterized in the rod-shaped member and being integrally molded. 前記棒状部材は、回転軸の外周面に螺旋羽根を備えて回転可能に設けられ、
前記螺旋羽根に沿った形状を有して前記棒状部材を支持する支持部材を備え、
前記棒状部材は、前記現像剤容器が縮小して前記排出口の方向に移動する際に、前記螺旋羽根が前記支持部材に接触して押圧されることにより回転する
ことを特徴とする請求項１又は２に記載の現像剤容器。 The rod-shaped member is provided with a spiral blade on the outer peripheral surface of the rotating shaft and is rotatably provided.
A support member for supporting the rod-shaped member having a shape along the spiral blade;
2. The rod-shaped member is rotated when the spiral blade contacts and is pressed against the support member when the developer container shrinks and moves in the direction of the discharge port. Or a developer container according to 2; 前記棒状部材は、回転軸の外周面に複数の螺旋羽根を備えて回転可能に設けられ、
前記複数の螺旋羽根のうちの少なくとも一つに沿った形状を有して前記棒状部材を支持する支持部材を備え、
前記棒状部材は、前記現像剤容器が縮小して前記排出口の方向に移動する際に、前記複数の螺旋羽根のうちの少なくとも一つが前記支持部材に接触して押圧されることにより回転する
ことを特徴とする請求項１又は２に記載の現像剤容器。 The rod-shaped member is provided rotatably with a plurality of spiral blades on the outer peripheral surface of the rotation shaft,
A support member for supporting the rod-shaped member having a shape along at least one of the plurality of spiral blades;
The rod-shaped member rotates when at least one of the plurality of spiral blades is pressed against the support member when the developer container shrinks and moves in the direction of the discharge port. The developer container according to claim 1 or 2 . 請求項１から５の何れか一項に記載の現像剤容器を備えることを特徴とする現像装置。 Developing apparatus is characterized in that it comprises a developer container according to any one of claims 1 to 5. 請求項６に記載の現像装置を備え、画像形成装置に着脱可能に設けられたことを特徴とするプロセスカートリッジ。 A process cartridge comprising the developing device according to claim 6, which is detachably attached to the image forming apparatus. 請求項６に記載の現像装置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 claim 6 .
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