JP2005037671A - Image forming apparatus, supply member and developing device used for image forming apparatus - Google Patents

Image forming apparatus, supply member and developing device used for image forming apparatus Download PDF

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JP2005037671A
JP2005037671A JP2003274320A JP2003274320A JP2005037671A JP 2005037671 A JP2005037671 A JP 2005037671A JP 2003274320 A JP2003274320 A JP 2003274320A JP 2003274320 A JP2003274320 A JP 2003274320A JP 2005037671 A JP2005037671 A JP 2005037671A
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blade
developer
blade member
spiral
image forming
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JP4403740B2 (en
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Kiyoshi Sako
潔 酒向
Mutsumi Kikuchi
睦 菊池
Toyohiko Awano
豊彦 粟野
Hisaya Iwata
尚也 岩田
Tooru Ikisu
徹 五十洲
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Fujifilm Business Innovation Corp
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Fuji Xerox Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain an image forming apparatus where developer is efficiently carried and also irregular concentration is made small by making the amount of the developer small on the carrying surface side and the anti-carrying surface side of a spiral blade, and to obtain a supply member and a developing device used for the image forming apparatus. <P>SOLUTION: By providing a blade member 128 parallel with a rotary shaft 124 to a spiral auger 112 and providing space between the outer peripheral surface of the rotary shaft 124 and the inner surface of the blade member 128, the developer is poured into the space and also the amount of the developer on the carrying surface 126A side is regulated. Thus, the difference of the amount of the developer is made small between the carrying surface 126A side and the anti-carrying surface 126B side of the spiral blade 126, and also the blade member 128 is provided in a continuous state over the shaft direction of the spiral auger 112, so that the developer is supplied uniformly to a magnet roll and a developer layer formed on the magnet roll is made uniform. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は、電子写真方式を適用した複写機、プリンタ、ファクシミリあるいはこれらの複合機等の画像形成装置及びこれに用いる供給部材、現像器に関するものである。   BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a copying machine, a printer, a facsimile, or a composite machine using an electrophotographic method, a supply member used for the image forming apparatus, and a developing device.

従来、この種の電子写真方式を適用した複写機、プリンタ、ファクシミリあるいはこれらの複合機等の画像形成装置に用いられる現像装置では、現像剤(トナーと磁性キャリアからなる)が充填された現像器が搭載されており、この現像器を感光体ドラムに対向配置し、感光体ドラムの表面にトナーを飛翔させ、静電潜像をトナーで可視像化することで、画像形成が行われる。   2. Description of the Related Art Conventionally, in a developing device used in an image forming apparatus such as a copying machine, a printer, a facsimile, or a composite machine to which this type of electrophotographic method is applied, a developing device filled with a developer (consisting of toner and a magnetic carrier). The developing device is disposed opposite to the photosensitive drum, the toner is ejected onto the surface of the photosensitive drum, and the electrostatic latent image is visualized with the toner, thereby forming an image.

例えば、図21に示す現像装置200では、現像器本体201にマグネットロール203と2本のスパイラルオーガ202、204を回転自在に支持させ、2本のスパイラルオーガ202、204を逆方向に回転させている(本出願人が先に提案した特願2002−145661号)。   For example, in the developing device 200 shown in FIG. 21, a magnet roll 203 and two spiral augers 202 and 204 are rotatably supported on the developing device main body 201, and the two spiral augers 202 and 204 are rotated in the opposite directions. (Japanese Patent Application No. 2002-145661 previously proposed by the present applicant).

現像器本体201には、現像器本体201の長手方向に沿って隔壁206を形成しており、現像器本体201内を空間208と空間210に区画している。空間208にはスパイラルオーガ202を配設しており、空間210にはスパイラルオーガ204を配設している。また、現像器本体201の両端部には、循環口212を設けており、空間208と空間210とを連通させている。   A partition wall 206 is formed in the developing device main body 201 along the longitudinal direction of the developing device main body 201, and the inside of the developing device main body 201 is partitioned into a space 208 and a space 210. A spiral auger 202 is disposed in the space 208, and a spiral auger 204 is disposed in the space 210. Further, circulation ports 212 are provided at both ends of the developing device main body 201 so that the space 208 and the space 210 are communicated with each other.

空間210側には、現像剤が供給される現像剤入口214を設けており、この現像剤入口214から空間210内に入った現像剤は、スパイラルオーガ204によって空間210内で搬送され、循環口212を経て空間208へ案内されて、今度はスパイラルオーガ202によって搬送されると共に、現像剤がマグネットロール203へ供給されるようになっている。   A developer inlet 214 to which a developer is supplied is provided on the space 210 side, and the developer that has entered the space 210 from the developer inlet 214 is conveyed in the space 210 by the spiral auger 204 and is supplied to the circulation port. After being guided to the space 208 via 212, this time it is conveyed by the spiral auger 202 and the developer is supplied to the magnet roll 203.

ここで、スパイラルオーガ202の場合、スパイラル状に形成されたスパイラル羽根216の搬送面216A側で現像剤を効率良く搬送する(矢印方向へ搬送)反面、スパイラルオーガ204のスパイラル羽根216内の現像剤は、スパイラルオーガ202の回転によって、スパイラル羽根216の互いに対面する反搬送面216B側から搬送面216A側へ流され、スパイラル羽根216の搬送面216Aから反搬送面216Bへ行くに従って、搬送する現像剤の量は徐々に少なくなる。   Here, in the case of the spiral auger 202, the developer is efficiently conveyed on the conveying surface 216A side of the spiral blade 216 formed in a spiral shape (conveyed in the direction of the arrow), whereas the developer in the spiral blade 216 of the spiral auger 204 is. Is rotated from the opposite conveying surface 216B side of the spiral blade 216 to the conveying surface 216A side by the rotation of the spiral auger 202, and is conveyed as the developer moves from the conveying surface 216A of the spiral blade 216 to the opposite conveying surface 216B. The amount of will gradually decrease.

このため、マグネットロール203上に形成される現像剤層では、現像剤の密の部分と疎の部分がスパイラル状に発生してしまい、プリント上には斜め状の白筋(濃度ムラ)が生じてしまう。このように、濃度ムラが発生すると、感光体ドラム上のパッチ濃度を測定する際に誤検知が生じてしまう。   For this reason, in the developer layer formed on the magnet roll 203, a dense portion and a sparse portion of the developer are generated in a spiral shape, and oblique white stripes (density unevenness) are generated on the print. End up. As described above, when density unevenness occurs, erroneous detection occurs when measuring the patch density on the photosensitive drum.

一方、濃度ムラをなくすため、特許文献1では、外周面に螺旋状突起が形成されると共に、外周面に開口部が断続的に形成された筒体の軸芯部に、スパイラル状の供給部材が配設されている。また、特許文献2及び3では、回転軸の外周面から半径方向へ向かってパドルが張り出しており、特許文献4では、多重スパイラルで構成された供給部材を用いている。
特開2001−042615号公報 特開2001−222154号公報 特開平07−013420号公報 特開平09−197782号公報
On the other hand, in order to eliminate density unevenness, in Patent Document 1, a spiral-shaped supply member is formed on the axial center portion of a cylindrical body in which spiral protrusions are formed on the outer peripheral surface and openings are intermittently formed on the outer peripheral surface. Is arranged. In Patent Documents 2 and 3, a paddle projects from the outer peripheral surface of the rotating shaft in the radial direction. In Patent Document 4, a supply member configured by multiple spirals is used.
JP 2001-042615 A JP 2001-222154 A Japanese Unexamined Patent Publication No. 07-013420 Japanese Patent Application Laid-Open No. 09-197782

しかしながら、これらは、スパイラル羽根の搬送面側と反搬送面側の現像剤量の差について言及し、搬送面側と反搬送面側とで、現像剤の量を小さくすることで、現像剤担持体上へ均一に現像剤を供給するというものではない。   However, these refer to the difference in the developer amount between the conveying surface side and the non-conveying surface side of the spiral blade, and by reducing the amount of developer between the conveying surface side and the counter-conveying surface side, the developer carrying It does not mean that the developer is uniformly supplied onto the body.

本発明は上記事実を考慮し、スパイラル羽根の搬送面側と反搬送面側とで、現像剤の量を小さくして、現像剤を効率良く搬送すると共に、濃度ムラを小さくする画像形成装置及びこれに用いる供給部材、現像器を提供することを目的とする。   In consideration of the above-described facts, the present invention reduces the amount of developer on the transport surface side and the counter-transport surface side of the spiral blade, efficiently transports the developer, and reduces density unevenness and It is an object of the present invention to provide a supply member and a developing device used for this.

請求項1に記載の発明は、現像剤を搬送して現像剤担持体に現像剤を供給する供給部材が、回転軸と、前記回転軸を中心にスパイラル状に形成されたスパイラル羽根と、で構成され、現像剤を搬送する前記スパイラル羽根の搬送面と前記搬送面と対面する反搬送面の間へ前記回転軸と平行に羽根部材を架け渡したことを特徴としている。   According to the first aspect of the present invention, the supply member that conveys the developer and supplies the developer to the developer carrying member includes: a rotation shaft; and a spiral blade formed in a spiral shape around the rotation shaft. The blade member is constructed so as to extend in parallel with the rotation axis between a conveying surface of the spiral blade that conveys the developer and a counter-conveying surface that faces the conveying surface.

請求項1に記載の発明では、現像剤を搬送するスパイラル羽根の搬送面と搬送面と対面する反搬送面の間へ回転軸と平行に羽根部材を架け渡すことで、回転軸の外周面と羽根部材の内面との間には空間が生じることとなる。   In the first aspect of the present invention, the blade member is bridged in parallel with the rotation axis between the conveyance surface of the spiral blade that conveys the developer and the opposite conveyance surface facing the conveyance surface, so that the outer circumferential surface of the rotation shaft A space is generated between the inner surface of the blade member.

従来では、スパイラル羽根の搬送面によって搬送される現像剤は、搬送面の箇所では多量に存在し、反搬送面の箇所には少量に存在している。しかし、回転軸の外周面と羽根部材の内面との間に空間を設けることで、該空間内に現像剤を流し込み、搬送面側の現像剤の量を規制すると共に、羽根部材に現像剤を乗せることができるため、搬送面側と反搬送面側とで、現像剤の量の差を小さくする事ができる。   Conventionally, the developer conveyed by the conveying surface of the spiral blade is present in a large amount at the position of the conveying surface, and is present in a small amount at the position of the opposite conveying surface. However, by providing a space between the outer peripheral surface of the rotating shaft and the inner surface of the blade member, the developer is poured into the space, the amount of developer on the conveying surface side is regulated, and the developer is supplied to the blade member. Therefore, the difference in the amount of developer can be reduced between the conveyance surface side and the non-conveyance surface side.

これにより、スパイラル羽根の搬送面側と反搬送面側の箇所による現像剤担時体への現像剤の供給量の差を小さくすることができる。   As a result, the difference in the amount of developer supplied to the developer-carrying member between the spiral blade conveyance surface side and the counter-conveyance surface side can be reduced.

ここで、羽根部材はスパイラル羽根の搬送面側と反搬送面側の間を架け渡しており、羽根部材をスパイラル羽根の外周部に設けることで、羽根部材が搬送面或いは反搬送面によって分断されることはなく、供給部材の軸方向に渡って連続した状態で設けられることになる。このため、羽根部材上の現像剤は、供給部材の搬送方向に沿って全体的に移動することとなり、スパイラル羽根の搬送面側と反搬送面側とで、現像剤の量に大きな差は生じない。つまり、スパイラル羽根の搬送面側と反搬送面側とで、現像剤の量の差を小さくすることができる。   Here, the blade member spans between the conveying surface side and the non-conveying surface side of the spiral blade. By providing the blade member on the outer peripheral portion of the spiral blade, the blade member is divided by the conveying surface or the anti-conveying surface. It is not provided, and is provided in a continuous state over the axial direction of the supply member. For this reason, the developer on the blade member moves as a whole along the conveyance direction of the supply member, and there is a large difference in the amount of developer between the conveyance surface side and the non-conveyance surface side of the spiral blade. Absent. That is, the difference in the amount of developer can be reduced between the conveyance surface side and the opposite conveyance surface side of the spiral blade.

従って、現像剤担持体上へ均一に現像剤を供給することが可能となり、現像剤担持体上に形成される現像剤層を均一にすることができる。これにより、斜め状の白筋(濃度ムラ)の発生を防止することができ、良好な画像を得ることができる。   Accordingly, the developer can be supplied uniformly onto the developer carrying member, and the developer layer formed on the developer carrying member can be made uniform. As a result, it is possible to prevent the occurrence of oblique white streaks (density unevenness) and obtain a good image.

本発明は、上記構成としたので、請求項1に記載の発明では、スパイラル羽根の搬送面側と反搬送面側とで、現像剤の量の差を小さくすることができると共に、羽根部材に現像剤を乗せることができるため、羽根部材によっても現像剤担持体へ現像剤を供給することができる。また、現像剤担持体上へ均一に現像剤を供給することが可能となり、現像剤担持体上に形成される現像剤層を均一にすることができる。従って、斜め状の白筋(濃度ムラ)の発生を防止することができ、良好な画像を得ることができる。   Since the present invention is configured as described above, the invention according to claim 1 can reduce the difference in the amount of developer between the conveying surface side and the non-conveying surface side of the spiral blade, and the blade member. Since the developer can be loaded, the developer can be supplied to the developer carrier also by the blade member. Further, the developer can be supplied uniformly onto the developer carrying member, and the developer layer formed on the developer carrying member can be made uniform. Therefore, it is possible to prevent the occurrence of oblique white streaks (density unevenness) and obtain a good image.

次に、本発明の実施の形態を図面に基づいて説明する。   Next, embodiments of the present invention will be described with reference to the drawings.

図1には、本発明の実施の形態に係る画像形成装置10の概要が示されている。画像形成装置10には、画像形成装置本体12が備えられており、画像形成装置本体12の下部には、給紙ユニット14が設けられている。   FIG. 1 shows an outline of an image forming apparatus 10 according to an embodiment of the present invention. The image forming apparatus 10 includes an image forming apparatus main body 12, and a paper feeding unit 14 is provided below the image forming apparatus main body 12.

この給紙ユニット14は、用紙が積載される用紙トレイ22と、この用紙トレイ22から用紙を送り出す給紙ロール24と、で構成されており、給紙ロール24により送り出された用紙は、搬送ロール26、28を経て給紙路30を通過し、後述する転写ロール74へ搬送される。   The paper feed unit 14 includes a paper tray 22 on which paper is stacked and a paper feed roll 24 that sends out the paper from the paper tray 22. The paper passes through the paper feed path 30 through the paper 26 and 28, and is conveyed to a transfer roll 74 described later.

この転写ロール74によってトナー像が用紙に転写され、定着ロール32で定着された後、切替爪34の位置選択によって、排出ロール36又は排出ロール38により、画像形成装置本体12の上部に設けられた第1の排出トレイ16又は第2の排出トレイ18へ排出される。   After the toner image is transferred to the paper by the transfer roll 74 and fixed by the fixing roll 32, the toner image is provided on the upper portion of the image forming apparatus main body 12 by the discharge roll 36 or the discharge roll 38 depending on the position of the switching claw 34. The paper is discharged to the first discharge tray 16 or the second discharge tray 18.

ここで、両面印刷の場合、上記のような順序で表面の印刷が終わった後、第1の排出トレイ16へ用紙が排出される前に、排出ロール36が逆転し、該用紙が反転路40へ供給される。そして、搬送ロール42、44、46、48を経て再び給紙路30に戻され、用紙の裏面側が印刷される。また、手差し印刷の場合、手差しトレイ20へ用紙を載置することで、用紙は手差しロール49から搬送ロール48を経て給紙路30へ搬送され、印刷される。   Here, in the case of double-sided printing, after the printing of the front surface is completed in the above-described order, before the paper is discharged to the first discharge tray 16, the discharge roll 36 is reversed, and the paper is turned to the reverse path 40. Supplied to. The paper is then returned to the paper feed path 30 through the transport rolls 42, 44, 46, 48, and the back side of the paper is printed. In the case of manual printing, by placing paper on the manual feed tray 20, the paper is transported from the manual feed roll 49 to the paper feed path 30 via the transport roll 48 and printed.

ところで、画像形成装置10の図1右側には、各色毎の現像剤(トナーと磁性キャリアからなる)が充填された現像剤カートリッジ64が4つ配置されている。この現像剤カートリッジ64は、それぞれ図示しない現像剤供給路によって後述する現像器60と接続されており、現像剤カートリッジ64中の現像剤が現像器60へ供給される。   On the right side of FIG. 1 of the image forming apparatus 10, four developer cartridges 64 filled with a developer (consisting of toner and magnetic carrier) for each color are arranged. The developer cartridge 64 is connected to a later-described developing device 60 through a developer supply path (not shown), and the developer in the developer cartridge 64 is supplied to the developing device 60.

現像剤カートリッジ64の図1左側には、露光ユニット62が配置されており、露光ユニット62からは、画像信号に応じた4本のレーザ光が、露光ユニット62の図1左側に配置された感光体ユニット50を構成する感光体52へ向けて発せられ、感光体52に潜像を形成するようになっている。   An exposure unit 62 is disposed on the left side of the developer cartridge 64 in FIG. 1, and four laser beams corresponding to image signals from the exposure unit 62 are disposed on the left side in FIG. 1 of the exposure unit 62. It is emitted toward the photosensitive member 52 constituting the body unit 50 and forms a latent image on the photosensitive member 52.

感光体ユニット50は、縦方向に並べられた4つの感光体52(52Y、52M、52K、52C)を備えており、上部から例えばイエロー(52Y)、マゼンダ(52M)、ブラック(52K)、シアン(52C)用となっている。   The photoconductor unit 50 includes four photoconductors 52 (52Y, 52M, 52K, and 52C) arranged in the vertical direction. From the top, for example, yellow (52Y), magenta (52M), black (52K), and cyan. (52C).

感光体ユニット50には、各感光体52に対応して、帯電ロール56及びリフレッシュロール54が備えられており、それぞれ感光体52に接触回転するように設けられている。帯電ロール56では、感光体52を一様に帯電させ、後述する現像器ユニット58に備えられたマグネットロール80から飛翔するトナーを感光体52の表面に付着させる。一方、リフレッシュロール54では感光体52を放電させ、感光体52の表面に付着した残留トナーを取り除き、感光体52の表面にトナーが残留することで生じるゴースト等を防止する。   The photoconductor unit 50 includes a charging roll 56 and a refresh roll 54 corresponding to each photoconductor 52, and is provided so as to rotate in contact with the photoconductor 52. In the charging roll 56, the photosensitive member 52 is uniformly charged, and toner flying from a magnet roll 80 provided in the developing unit 58 described later is attached to the surface of the photosensitive member 52. On the other hand, the refresh roll 54 discharges the photosensitive member 52 to remove residual toner adhering to the surface of the photosensitive member 52, thereby preventing ghosts and the like caused by the toner remaining on the surface of the photosensitive member 52.

ここで、現像器ユニット58は、感光体ユニット50の図1右下側に配置されており、各感光体52(52Y、52M、52K、52C)に対応して4つの現像器60(60Y、60M、60K、60C)が縦方向に並べられている。   Here, the developing unit 58 is arranged on the lower right side of the photosensitive unit 50 in FIG. 1 and corresponds to the four developing units 60 (60Y, 60Y, 52C) corresponding to the photosensitive units 52 (52Y, 52M, 52K, 52C). 60M, 60K, 60C) are arranged in the vertical direction.

この現像器60は、トリクル現像方式(現像剤の帯電性能の低下を防止して現像剤交換のインターバルを延ばすために、現像器内に現像剤を徐々に補給する一方で、過剰になった(劣化したキャリアを多く含む)劣化現像剤を排出しながら現像を行う現像方式である)を採用しており、劣化現像剤は図示しない回収容器に回収されるようになっている。   The developing device 60 is in a trickle developing system (in order to prevent the charging performance of the developer from being lowered and to extend the interval for changing the developer, the developer is gradually replenished in the developing device, but becomes excessive ( This is a developing system in which development is performed while discharging a deteriorated developer (which contains a lot of deteriorated carriers), and the deteriorated developer is collected in a collection container (not shown).

一方、感光体ユニット50の図1左側には、中間転写ユニット66が配置されており、3つのドラム状の中間転写体68、70、72が備えられている。2つの第1中間転写体68、70は、縦方向に上下に並べられており、上部の第1中間転写体68が、感光体52のうち上部に配置された2つの感光体52Y、52Mに接触回転し、下部の第1中間転写体70が、下部に配置された2つの感光体52K、52Cに接触回転するようになっている。また、第2中間転写体72は、第1中間転写体68、70の双方に接触回転するようになっており、この第2中間転写体72に、前述した転写ロール74が接触回転する。   On the other hand, an intermediate transfer unit 66 is arranged on the left side of the photoconductor unit 50 in FIG. 1, and three drum-shaped intermediate transfer bodies 68, 70, and 72 are provided. The two first intermediate transfer members 68 and 70 are arranged vertically in the vertical direction, and the upper first intermediate transfer member 68 is arranged on the two photoconductors 52Y and 52M arranged at the upper portion of the photoconductor 52. The lower first intermediate transfer member 70 rotates in contact with the two photoconductors 52K and 52C disposed in the lower portion. Further, the second intermediate transfer member 72 is rotated in contact with both the first intermediate transfer members 68 and 70, and the transfer roll 74 described above is rotated in contact with the second intermediate transfer member 72.

したがって、感光体52Y、52Mから各トナー像が第1中間転写体68に転写され、感光体52K、52Cから各トナー像が第1中間転写体70にそれぞれ転写される。この第1中間転写体68、70に転写された各2色のトナー像が、第2中間転写体72に転写されて4色となり、この4色のトナー像が転写ロール74により用紙に転写されることになる。   Accordingly, the toner images are transferred from the photoconductors 52Y and 52M to the first intermediate transfer body 68, and the toner images are transferred from the photoconductors 52K and 52C to the first intermediate transfer body 70, respectively. The two color toner images transferred to the first intermediate transfer bodies 68 and 70 are transferred to the second intermediate transfer body 72 to form four colors, and the four color toner images are transferred onto the sheet by the transfer roll 74. Will be.

これらの中間転写体68、70、72の近傍には、それぞれクリーニングロール76及びクリーニングブラシ78が配置されており、中間転写体68、70、72の表面の残留トナーが掻き落とされる。   A cleaning roll 76 and a cleaning brush 78 are disposed in the vicinity of the intermediate transfer members 68, 70, and 72, respectively, and the residual toner on the surface of the intermediate transfer members 68, 70, and 72 is scraped off.

次に、現像器ユニットの詳細について説明する。   Next, details of the developing unit will be described.

図2及び図3に示すように、現像器ユニット58は4つの現像器60で構成されており、各現像器60の現像器本体110には、感光体52へトナーを供給するマグネットロール80と、現像器60内の現像剤を搬送しマグネットロール80へ現像剤を供給する2本のスパイラルオーガ112、114と、が回転自在に軸支されている。   As shown in FIGS. 2 and 3, the developing device unit 58 includes four developing devices 60, and the developing device main body 110 of each developing device 60 includes a magnet roll 80 that supplies toner to the photosensitive member 52, and Two spiral augers 112 and 114 that transport the developer in the developing device 60 and supply the developer to the magnet roll 80 are rotatably supported.

また、各現像器60は、マグネットロール80が感光体52に当接する位置と、感光体52から退避した位置とに移動可能となっており、画像形成時には、マグネットロール80が感光体52に当接するようになっている。これにより、感光体52に形成された潜像に対応してトナーが感光体52に付着するようにしているが、画像形成が行われない場合には、現像器ユニット58は感光体52から退避するようになっている。   Each developing device 60 can move between a position where the magnet roll 80 abuts on the photoconductor 52 and a position where the magnet roll 80 is retracted from the photoconductor 52, and the magnet roll 80 contacts the photoconductor 52 during image formation. It comes to touch. As a result, toner adheres to the photoconductor 52 corresponding to the latent image formed on the photoconductor 52. However, when image formation is not performed, the developing unit 58 is retracted from the photoconductor 52. It is supposed to be.

具体的には、現像器ユニット58を構成する現像器ユニット本体82には、レール部材84が設けられており、このレール部材84には可動片86が上下動自在に支持されている。この可動片86の下端には、カム88が当接しており、このカム88が現像器移動用モータ90に接続されている。   Specifically, the developing device unit main body 82 constituting the developing device unit 58 is provided with a rail member 84, and a movable piece 86 is supported on the rail member 84 so as to be movable up and down. A cam 88 is in contact with the lower end of the movable piece 86, and the cam 88 is connected to the developing device moving motor 90.

また、可動片86と現像器60との間には、駆動部材92が配置されており、この駆動部材92は、支点ピン94を中心に、レール部材84に対して回動自在に支持されている。駆動部材92の一端には、第1押圧ばね98により突出可能な押圧ピン96が設けられており、この押圧ピン96が現像器60に当接する。   Further, a drive member 92 is disposed between the movable piece 86 and the developing device 60, and this drive member 92 is rotatably supported with respect to the rail member 84 around the fulcrum pin 94. Yes. One end of the drive member 92 is provided with a pressing pin 96 that can be protruded by the first pressing spring 98, and the pressing pin 96 contacts the developing device 60.

さらに、駆動部材92の他端に設けられた回動ピン100が、可動片86に形成された受け溝102に嵌合されており、可動片86を下降させると、駆動部材92が時計方向に回転し、現像器60から離れる方向に移動する。   Further, the rotation pin 100 provided at the other end of the drive member 92 is fitted in the receiving groove 102 formed in the movable piece 86, and when the movable piece 86 is lowered, the drive member 92 is rotated clockwise. It rotates and moves away from the developing device 60.

また、図3及び図4に示すように、現像器60の両側には摺動ピン104が設けられており、この摺動ピン104は、現像器ユニット本体82に設けられた摺動溝106に摺動自在に挿入されている。一方、現像器ユニット本体82には、この摺動ピン104を現像器60が感光体52から離れる方向に押圧する第2押圧ばね108が設けられている。   As shown in FIGS. 3 and 4, sliding pins 104 are provided on both sides of the developing device 60, and the sliding pins 104 are formed in sliding grooves 106 provided in the developing device unit main body 82. It is slidably inserted. On the other hand, the developing device unit main body 82 is provided with a second pressing spring 108 that presses the sliding pin 104 in a direction in which the developing device 60 moves away from the photosensitive member 52.

このため、図3の状態から現像器移動用モータ90が駆動して可動片86が下降すると、駆動部材92が支点ピン94を支点として時計方向に回転し、第1押圧ばね98によって押圧ピン96が現像器60を押圧する押圧力が弱まり、第2押圧ばね108の押圧力が第1押圧ばね98の押圧力に打ち勝って、現像器60が感光体52から離れる方向に移動する。   Therefore, when the developing device moving motor 90 is driven from the state of FIG. 3 and the movable piece 86 is lowered, the driving member 92 rotates clockwise with the fulcrum pin 94 as a fulcrum, and the first pressing spring 98 presses the pressing pin 96. However, the pressing force that presses the developing device 60 is weakened, the pressing force of the second pressing spring 108 overcomes the pressing force of the first pressing spring 98, and the developing device 60 moves away from the photoconductor 52.

以上のような構成により、例えば、クリーニングサイクルにあっては、トナーが感光体52に付着して混色を生じるのを防止し、現像器ユニット58を交換する場合には、感光体52とマグネットロール80との接触による傷発生等を防止することができる。   With the above configuration, for example, in the cleaning cycle, toner is prevented from adhering to the photosensitive member 52 and color mixing is prevented. When the developing unit 58 is replaced, the photosensitive member 52 and the magnet roll are replaced. The occurrence of scratches due to contact with 80 can be prevented.

次に、本発明の第1の実施形態に係る画像形成装置を構成する現像器の要部について説明する。   Next, the main part of the developing device constituting the image forming apparatus according to the first embodiment of the present invention will be described.

図2及び図5に示すように、現像器60の現像器本体110には、マグネットロール80と、2本のスパイラルオーガ112、114と、が回転自在に軸支されており、スパイラルオーガ112とスパイラルオーガ114は互いに逆方向に回転するようにしている。   As shown in FIGS. 2 and 5, a magnet roll 80 and two spiral augers 112 and 114 are rotatably supported on the developing device main body 110 of the developing device 60. The spiral auger 114 rotates in opposite directions.

また、現像器本体110には、現像器本体110の長手方向に沿って隔壁113を設けており、現像器本体110内を空間115、117に区画している。空間115にはスパイラルオーガ112を配設しており、空間117にはスパイラルオーガ114を配設し、スパイラルオーガ112、114によって現像剤を矢印方向へ搬送する。   Further, the developing device main body 110 is provided with a partition wall 113 along the longitudinal direction of the developing device main body 110, and the inside of the developing device main body 110 is divided into spaces 115 and 117. A spiral auger 112 is disposed in the space 115, and a spiral auger 114 is disposed in the space 117, and the developer is conveyed in the direction of the arrow by the spiral augers 112 and 114.

さらに、現像器本体110の両端部には、循環口116を設けており、空間115と空間117とを連通させている。また、現像器本体110の空間117側には、現像剤が供給される現像剤入口118を設けており、この現像剤入口118から現像剤が供給される。供給された現像剤は、スパイラルオーガ112によって空間117内を搬送され、循環口116を経て空間115へ案内された後、今度はスパイラルオーガ112によって搬送されると共に、現像剤がマグネットロール80へ供給される。   Further, circulation ports 116 are provided at both ends of the developing device main body 110, and the space 115 and the space 117 are communicated with each other. Further, a developer inlet 118 to which a developer is supplied is provided on the space 117 side of the developing device main body 110, and the developer is supplied from the developer inlet 118. The supplied developer is transported in the space 117 by the spiral auger 112, guided to the space 115 through the circulation port 116, and then transported by the spiral auger 112, and the developer is supplied to the magnet roll 80. Is done.

一方、現像器本体110の空間115側には、排出部122を設けており、この排出部122には図示しない現像剤回収容器を連結させ、劣化した現像剤を排出部122から排出して、回収容器へ回収するようにしている。   On the other hand, a discharge unit 122 is provided on the space 115 side of the developing device main body 110. A developer recovery container (not shown) is connected to the discharge unit 122, and the deteriorated developer is discharged from the discharge unit 122. It collects in the collection container.

ここで、本発明の第1の実施形態に係るスパイラルオーガ112について詳細に説明する。   Here, the spiral auger 112 according to the first embodiment of the present invention will be described in detail.

図5及び図6に示すように、スパイラルオーガ112は、回転軸124と、回転軸124周りをスパイラル状に形成したスパイラル羽根126と、で構成している。図7(A)、(B)に示すように、このスパイラル羽根126の外周部に回転軸124と平行に、羽根部材128をスパイラル羽根126の搬送面126Aと反搬送面126Bとの間へ架け渡している。つまり、回転軸124と平行に複数の羽根部材128を1本に連続させた状態で、スパイラル羽根126の外周部と羽根部材128の外面とが同一面となるように設けている。   As shown in FIGS. 5 and 6, the spiral auger 112 includes a rotation shaft 124 and a spiral blade 126 formed around the rotation shaft 124 in a spiral shape. As shown in FIGS. 7A and 7B, on the outer periphery of the spiral blade 126, the blade member 128 is placed between the conveying surface 126A and the counter-conveying surface 126B of the spiral blade 126 in parallel with the rotating shaft 124. Handing over. That is, the outer peripheral part of the spiral blade 126 and the outer surface of the blade member 128 are provided in the same plane in a state in which a plurality of blade members 128 are connected in parallel with the rotation shaft 124.

羽根部材128の幅を、図8(B)に示すように、反搬送面126B側から搬送面126A側へ行くに従って幅広となるようにしており、回転軸124の回転方向(矢印A方向)へ向かう側に位置する羽根部材128の側面128Aを上にした状態で、搬送面126A側から反搬送面126B側へ向かって下り勾配となるようにしている。   As shown in FIG. 8B, the width of the blade member 128 is increased from the counter-transport surface 126B side to the transport surface 126A side, and in the rotation direction of the rotary shaft 124 (arrow A direction). In a state in which the side surface 128A of the blade member 128 located on the opposite side is faced up, a downward slope is formed from the transport surface 126A side to the counter-transport surface 126B side.

また、図9(A)、(B)及び図10に示すように、羽根部材128の側面128Aの幅を、反搬送面126B側から搬送面側126Aへ行くに従って狭くなるようにしており、羽根部材128の肉厚を、回転軸124の回転方向側が薄くなるようにしている。さらに、羽根部材128の最大幅Wが、回転軸124を中心とする35°以下の弧となるようにしている。   Further, as shown in FIGS. 9A, 9B, and 10, the width of the side surface 128A of the blade member 128 is made narrower from the counter-transport surface 126B side to the transport surface side 126A. The thickness of the member 128 is set so that the rotation direction side of the rotating shaft 124 is thin. Further, the maximum width W of the blade member 128 is an arc of 35 ° or less with the rotation shaft 124 as the center.

また、図8(A)に示すように、回転軸124と羽根部材128の関係では、1≦(回転軸124から羽根部材128の内面までの距離h)/羽根部材128の厚みt≦3.5を満足させるようにしている。   Further, as shown in FIG. 8A, in the relationship between the rotating shaft 124 and the blade member 128, 1 ≦ (distance h from the rotating shaft 124 to the inner surface of the blade member 128) / thickness t ≦ 3. 5 is satisfied.

次に、本発明の第1の実施形態に係る画像形成装置の作用について説明する。   Next, the operation of the image forming apparatus according to the first embodiment of the present invention will be described.

図8(A)に示すように、スパイラルオーガ112に、回転軸124に平行な羽根部材128を設けることで、回転軸124の外周面と羽根部材128の内面との間には空間120が生じることとなる。   As shown in FIG. 8A, by providing the spiral auger 112 with a blade member 128 parallel to the rotation shaft 124, a space 120 is created between the outer peripheral surface of the rotation shaft 124 and the inner surface of the blade member 128. It will be.

従来では、スパイラル羽根126の搬送面126Aによって搬送される現像剤は、搬送面126Aの箇所では多量に存在し、反搬送面126Bの箇所には少量に存在している。   Conventionally, the developer conveyed by the conveying surface 126A of the spiral blade 126 is present in a large amount at the position of the conveying surface 126A and is present in a small amount at the position of the anti-conveying surface 126B.

しかし、回転軸124の外周面と羽根部材128の内面との間に空間120を設けることで、該空間120内に現像剤を流し込み、搬送面側126Aの現像剤の量を規制すると共に、羽根部材128に現像剤を乗せることができるため、搬送面側126Aと反搬送面側126Bとで、現像剤の量の差を小さくする事ができる。   However, by providing the space 120 between the outer peripheral surface of the rotating shaft 124 and the inner surface of the blade member 128, the developer is poured into the space 120, the amount of the developer on the conveying surface side 126A is regulated, and the blade Since the developer can be placed on the member 128, the difference in the amount of the developer can be reduced between the transport surface side 126A and the non-transport surface side 126B.

これにより、スパイラル羽根126の搬送面126A側と反搬送面126B側の箇所でのマグネットロール80への現像剤の供給量の差を小さくすることができる。   Thereby, the difference in the amount of developer supplied to the magnet roll 80 at the locations on the transport surface 126A side and the counter-transport surface 126B side of the spiral blade 126 can be reduced.

ここで、羽根部材128は、スパイラル羽根126の搬送面126A側と反搬送面126B側とを架け渡しており、羽根部材128をスパイラル羽根126の外周部に設けることで、羽根部材128が搬送面126A或いは反搬送面126Bによって分断されることはなく、スパイラルオーガ112の軸方向に渡って連続した状態で設けられることになる。   Here, the blade member 128 spans the conveying surface 126A side and the counter-conveying surface 126B side of the spiral blade 126, and the blade member 128 is provided on the outer peripheral portion of the spiral blade 126 so that the blade member 128 is transported. It is not divided by 126A or the counter-transport surface 126B, and is provided in a continuous state in the axial direction of the spiral auger 112.

このため、羽根部材128上の現像剤は、スパイラルオーガ112の搬送方向に沿って全体的に移動することとなり、スパイラル羽根126の搬送面126A側と反搬送面126B側とで、現像剤の量に大きな差は生じない。   For this reason, the developer on the blade member 128 moves as a whole along the conveying direction of the spiral auger 112, and the amount of developer on the conveying surface 126A side and the opposite conveying surface 126B side of the spiral blade 126 is increased. There will be no big difference.

従って、マグネットロール80(図5参照)上へ均一に現像剤を供給することが可能となり、マグネットロール80上に形成される現像剤層を均一にすることができる。従って、斜め状の白筋(濃度ムラ)の発生を防止することができ、良好な画像を得ることができる。   Therefore, the developer can be uniformly supplied onto the magnet roll 80 (see FIG. 5), and the developer layer formed on the magnet roll 80 can be made uniform. Therefore, it is possible to prevent the occurrence of oblique white streaks (density unevenness) and obtain a good image.

また、図10に示すように、回転軸124の回転方向へ向かう側に位置する羽根部材128の側面128Aを、搬送面126A側から反搬送面126B側へ向かう下り勾配とすることで、スパイラルオーガ112の回転により、羽根部材128の側面に保持された現像剤を、現像剤が密に存在する搬送面126A側から反搬送面126B側へ流し、羽根部材128によるマグネットロール80への現像剤の供給量をより回転軸124の軸方向で均一にすることができる。   Further, as shown in FIG. 10, the side surface 128A of the blade member 128 positioned on the side of the rotating shaft 124 in the rotational direction is set to have a downward slope from the conveying surface 126A side to the counter-conveying surface 126B side. By the rotation of 112, the developer held on the side surface of the blade member 128 is caused to flow from the conveyance surface 126A side where the developer is densely present to the opposite conveyance surface 126B side, and the developer is applied to the magnet roll 80 by the blade member 128. The supply amount can be made more uniform in the axial direction of the rotating shaft 124.

また、図9(A)、(B)及び図10に示すように、羽根部材128の側面128Aの幅を、反搬送面126B側から搬送面側126Aへ行くに従って狭くなるようにしており、羽根部材128の肉厚を、回転軸124の回転方向側が薄くなるようにしている。   Further, as shown in FIGS. 9A, 9B, and 10, the width of the side surface 128A of the blade member 128 is made narrower from the counter-transport surface 126B side to the transport surface side 126A. The thickness of the member 128 is set so that the rotation direction side of the rotating shaft 124 is thin.

これにより、反搬送面126B側から搬送面側126Aへ行くに従って羽根部材128の側面128Aの面積は小さくなってしまう。このため、羽根部材128の側面128A上に乗る現像剤の量が制限されてしまうこととなり、羽根部材128による現像剤のマグネットロール80への供給量を規制することができる。   As a result, the area of the side surface 128A of the blade member 128 becomes smaller as going from the counter-transport surface 126B side to the transport surface side 126A. For this reason, the amount of the developer that gets on the side surface 128A of the blade member 128 is limited, and the supply amount of the developer to the magnet roll 80 by the blade member 128 can be regulated.

また、回転軸124の回転方向へ向かって羽根部材128の肉厚を薄くすることで、羽根部材128が現像剤内へ沈み込むときに、羽根部材128を静かに沈み込ませることができる。   Further, by reducing the thickness of the blade member 128 toward the rotation direction of the rotating shaft 124, the blade member 128 can be gently submerged when the blade member 128 sinks into the developer.

このため、羽根部材128が現像剤内へ沈み込むことで、羽根部材128周りの現像剤へ影響を与えることはなく、羽根部材128が現像剤内へ沈み込むときの衝撃によってマグネットロール80の表面から剥がれ落ちスパイラルオーガ112側へ戻ろうとする現像剤が、マグネットロール80側へ逆戻りしてしまうという恐れはない。   For this reason, the blade member 128 sinks into the developer, so that the developer around the blade member 128 is not affected, and the surface of the magnet roll 80 is affected by the impact when the blade member 128 sinks into the developer. There is no fear that the developer that peels off and returns to the spiral auger 112 side returns to the magnet roll 80 side.

ところで、羽根部材128は回転軸124とマグネットロール80との間に位置するため、換言すれば、回転軸124周りを羽根部材128で覆うことになってしまう。このため、羽根部材128の最大幅Wを回転軸124を中心とする35°よりも大きい弧にしてしまうと、マグネットロール80へ供給される現像剤の量が少なくなってしまい、プリント上への濃度ムラを防止するという効果を得ることができなくなってしまう。   By the way, since the blade member 128 is located between the rotary shaft 124 and the magnet roll 80, in other words, the blade member 128 covers the periphery of the rotary shaft 124. For this reason, if the maximum width W of the blade member 128 is set to an arc larger than 35 ° centering on the rotation shaft 124, the amount of developer supplied to the magnet roll 80 is reduced, and the amount of the developer onto the print is increased. The effect of preventing density unevenness cannot be obtained.

従って、羽根部材128の最大幅Wを、回転軸124を中心とする35°以下の弧となるようにすることで、マグネットロール80へ供給される現像剤の量を確保するようにしている。   Therefore, the amount of developer supplied to the magnet roll 80 is ensured by setting the maximum width W of the blade member 128 to an arc of 35 ° or less centering on the rotation shaft 124.

ここで、図8(A)に示すように、回転軸124と羽根部材128の関係で、1≦(回転軸124から羽根部材128の内面までの距離)/羽根部材128の厚みt≦3.5を満足させることで、現像剤のマグネットロール80への供給量と軸方向への搬送性とのバランスを図ることができ、プリント上への濃度ムラを防止することができる。また、スパイラル羽根126の外周部と羽根部材128の外面を同一面とすることで、現像剤の軸方向への搬送性を向上させることができる。   Here, as shown in FIG. 8A, the relationship between the rotating shaft 124 and the blade member 128 is 1 ≦ (distance from the rotating shaft 124 to the inner surface of the blade member 128) / the thickness t ≦ 3. 5 is satisfied, the balance between the supply amount of the developer to the magnet roll 80 and the transportability in the axial direction can be achieved, and density unevenness on the print can be prevented. Further, by making the outer peripheral portion of the spiral blade 126 and the outer surface of the blade member 128 the same surface, it is possible to improve the transportability of the developer in the axial direction.

なお、ここでは、複数の羽根部材128を、回転軸124と平行に1本に連続させた状態で配置したが、少なくともスパイラル羽根126の搬送面126Aと反搬送面126Bの間を羽根部材128で架け渡すことができれば良いため、羽根部材128の一端側をスパイラル羽根126に固定し、他端側を搬送面126A或いは反搬送面126Bに接触させても良い。   Here, the plurality of blade members 128 are arranged in a state of being continuous with one in parallel to the rotation shaft 124, but at least the space between the conveying surface 126 </ b> A of the spiral blade 126 and the anti-conveying surface 126 </ b> B is the blade member 128. Since it is sufficient if it can be bridged, one end side of the blade member 128 may be fixed to the spiral blade 126 and the other end side may be brought into contact with the transport surface 126A or the non-transport surface 126B.

また、羽根部材128を、回転軸124と平行に1本に連続させた状態で配置(以下、「スパイラル羽根126の360°毎に配置」という)したが、図11に示すように、羽根部材128を回転軸124を間に置いて対面した状態で配置(以下、「スパイラル羽根126の180°毎に配置」という)しても良い。   In addition, the blade member 128 is arranged in a state of being continuous with one in parallel with the rotation shaft 124 (hereinafter referred to as “arranged every 360 ° of the spiral blade 126”), but as shown in FIG. 128 may be arranged facing each other with the rotation shaft 124 therebetween (hereinafter referred to as “arrangement every 180 ° of the spiral blade 126”).

これにより、羽根部材128を、スパイラル羽根126を回転軸124と平行に1本に連続させた状態で配置した場合と比較して、より多くの現像剤をマグネットロール80へ供給することが可能となり、より良好な画像が得られる。   As a result, it is possible to supply more developer to the magnet roll 80 as compared with the case where the blade member 128 is arranged in a state where the spiral blade 126 is continuously connected in parallel with the rotation shaft 124. A better image can be obtained.

次に、本発明の第2の実施形態に係る画像形成装置の要部について説明する。なお、第1の実施形態と略同一の内容については説明を割愛する。   Next, main parts of the image forming apparatus according to the second embodiment of the present invention will be described. In addition, description is abbreviate | omitted about the content substantially the same as 1st Embodiment.

図12(A)、(B)に示すスパイラルオーガ130では、羽根部材132の、スパイラル羽根126の反搬送面126B側に隙間134を設けており、図13(A)に示すように、羽根部材132を側面視したとき(なお、スパイラルオーガ130の場合、平面視に相当)、羽根部材132の先端部を外面から内面へ向かって鋭角に切断している。   In the spiral auger 130 shown in FIGS. 12A and 12B, a gap 134 is provided on the side opposite to the conveying surface 126B of the spiral blade 126 of the blade member 132. As shown in FIG. When 132 is viewed from the side (in the case of the spiral auger 130, this corresponds to a plan view), the tip of the blade member 132 is cut at an acute angle from the outer surface toward the inner surface.

次に、本発明の第2の実施形態に係る画像形成装置の作用について説明する。   Next, the operation of the image forming apparatus according to the second embodiment of the present invention will be described.

図13(A)、(B)に示すように、羽根部材132の、スパイラル羽根126の反搬送面126B側に隙間134を設けることで、羽根部材132上の現像剤を、該隙間134を通じて羽根部材132と回転軸124との間に設けられた空間138内へ流し込むことができる。   As shown in FIGS. 13A and 13B, by providing a gap 134 on the blade member 132 on the side opposite to the conveying surface 126B of the spiral blade 126, the developer on the blade member 132 is allowed to pass through the gap 134. It can flow into the space 138 provided between the member 132 and the rotating shaft 124.

このように、羽根部材132上の現像剤を、空間138内へ流し込むことで、マグネットロール80(図5参照)へ供給する現像剤の量を少なくすることができるため、現像剤の軸方向の搬送性を向上させることができる。   Thus, since the developer on the blade member 132 is poured into the space 138, the amount of the developer supplied to the magnet roll 80 (see FIG. 5) can be reduced. Transportability can be improved.

これにより、マグネットロール80へ供給する現像剤量と軸方向へ搬送する現像剤量とのバランスを図ることができ、特に、現像器60(図5参照)内の現像剤の量が少ない機種において効果的である。   This makes it possible to achieve a balance between the amount of developer supplied to the magnet roll 80 and the amount of developer conveyed in the axial direction, particularly in a model with a small amount of developer in the developing device 60 (see FIG. 5). It is effective.

また、羽根部材132に隙間134を設け、羽根部材132を分断することで、スパイラルオーガ140を一体成形したときに、成形後の熱収縮による回転軸124の反りを防止することができる。   Further, by providing the gap 134 in the blade member 132 and dividing the blade member 132, when the spiral auger 140 is integrally formed, it is possible to prevent the rotation shaft 124 from warping due to thermal contraction after the formation.

また、羽根部材132を側面視したとき、羽根部材132の先端部を外面から内面へ向かって鋭角に切断することで、スパイラルオーガ140の回転により、回転軸124と羽根部材132との間に設けた空間138内に現像剤を誘導しやすくすることができ、現像剤の軸方向の搬送性を向上させることができる。   Further, when the blade member 132 is viewed from the side, the tip of the blade member 132 is cut at an acute angle from the outer surface toward the inner surface, so that the rotation of the spiral auger 140 causes the rotation between the rotating shaft 124 and the blade member 132. Further, the developer can be easily guided into the space 138, and the transportability of the developer in the axial direction can be improved.

なお、ここでは、スパイラル羽根126の360°毎に羽根部材132を配置したが、図14に示すように、スパイラル羽根126の180°毎に羽根部材132を、配置しても良い。   Here, the blade member 132 is arranged every 360 ° of the spiral blade 126, but the blade member 132 may be arranged every 180 ° of the spiral blade 126 as shown in FIG.

但し、羽根部材132を、スパイラル羽根126の180°毎に配置した場合、スパイラル羽根126の360°毎に配置した場合と比較して、より多くの現像剤をマグネットロール80へ供給することが可能となるが、その反面、現像剤の軸方向への搬送性が低下してしまう。   However, when the blade member 132 is arranged every 180 ° of the spiral blade 126, more developer can be supplied to the magnet roll 80 as compared to the case where the blade member 132 is arranged every 360 ° of the spiral blade 126. However, on the other hand, the transportability of the developer in the axial direction is reduced.

しかし、スパイラル羽根126の反搬送面126B側に隙間134を設けることで、余分な現像剤を、隙間134を通じて羽根部材132と回転軸124との間に設けられた空間138内へ流し込むことができるため、現像剤の軸方向の搬送性を向上させることが可能となる。   However, by providing the gap 134 on the side opposite to the conveying surface 126 </ b> B of the spiral blade 126, excess developer can be poured into the space 138 provided between the blade member 132 and the rotating shaft 124 through the gap 134. Therefore, it is possible to improve the transportability of the developer in the axial direction.

また、スパイラル羽根126の反搬送面126B側に隙間134を設け、羽根部材132を分断することで、スパイラルオーガ140の成形後の熱収縮による回転軸124の反りを防止することができると共に、羽根部材132を対面した状態で配置することで、スパイラルオーガ140を金型から離型させるときの離型バランスが良くなる。   Further, by providing a gap 134 on the side opposite to the conveying surface 126B of the spiral blade 126 and dividing the blade member 132, it is possible to prevent warping of the rotating shaft 124 due to thermal contraction after the formation of the spiral auger 140, and the blade By disposing the member 132 in a face-to-face state, the mold release balance when the spiral auger 140 is released from the mold is improved.

さらに、ここでは、スパイラル羽根126の反搬送面126B側に隙間134を設けたが、例えば、現像器60(図5参照)内の現像剤の量が多い機種については、図15(A)、(B)及び図16(なお、図15(A)、(B)は、スパイラル羽根126の360°毎に羽根部材142を配置し、図16は、スパイラル羽根126の180°毎に羽根部材142を配置したものである)に示すように、スパイラル羽根126の搬送面126A側に隙間144を設けた方が効果的である。   Further, here, the gap 134 is provided on the side opposite to the conveying surface 126B of the spiral blade 126. For example, for a model having a large amount of developer in the developing device 60 (see FIG. 5), FIG. (B) and FIG. 16 (Note that in FIGS. 15A and 15B, the blade member 142 is disposed every 360 ° of the spiral blade 126, and in FIG. 16, the blade member 142 is disposed every 180 ° of the spiral blade 126. It is more effective to provide a gap 144 on the side of the conveying surface 126A of the spiral blade 126 as shown in FIG.

ここで、スパイラル羽根126の搬送面126A側は反搬送面126B側と比較すると、羽根部材142の幅が広くなっている。このため、スパイラル羽根126の反搬送面126B側に隙間134を設けた場合(図13(A)、(B)参照)と比較して、羽根部材142の先端部とスパイラル羽根126の搬送面126Aの隙間144が、回転軸124の周方向で異なってしまう。このため、ここでは、隙間144の最小値を1.5mm以下とし、隙間144を、回転軸124の回転方向(矢印A方向)へ向かって広くなるようにしている。   Here, the width of the blade member 142 is wider on the conveying surface 126A side of the spiral blade 126 than on the non-conveying surface 126B side. For this reason, compared with the case where the clearance 134 is provided on the side opposite to the conveying surface 126B of the spiral blade 126 (see FIGS. 13A and 13B), the tip end portion of the blade member 142 and the conveying surface 126A of the spiral blade 126 are used. The gap 144 is different in the circumferential direction of the rotating shaft 124. For this reason, here, the minimum value of the gap 144 is set to 1.5 mm or less, and the gap 144 is made wider toward the rotation direction of the rotary shaft 124 (arrow A direction).

このように、隙間144を、回転軸124の回転方向へ向かって広くなるようにすることで、回転軸124と羽根部材132との間に設けた空間146内に現像剤をより誘導されやすくすることができる。これにより、空間146内へ現像剤がさらに流し込まれ、現像剤の軸方向の搬送性をさらに向上させることができる。   As described above, the gap 144 becomes wider toward the rotation direction of the rotation shaft 124, thereby making it easier for the developer to be guided into the space 146 provided between the rotation shaft 124 and the blade member 132. be able to. Thereby, the developer is further poured into the space 146, and the transportability of the developer in the axial direction can be further improved.

また、隙間144の最小値を1.5mm以下にすることで、隙間144内へ流れ込む現像剤の量を規制し、プリント上への濃度ムラを防止するという効果を確実に得るようにしている。   Further, by setting the minimum value of the gap 144 to 1.5 mm or less, the amount of the developer flowing into the gap 144 is regulated, and the effect of preventing density unevenness on the print is surely obtained.

また、羽根部材の一部に隙間を設ければ良いため、図17(A)、(B)及び図18(なお、図17(A)、(B)は、スパイラル羽根126の360°毎に羽根部材148を配置し、図18は、スパイラル羽根126の180°毎に羽根部材148を配置したものである)に示すように、羽根部材148を、長さ方向の略中央部で分断しても良い。   In addition, since it is only necessary to provide a gap in a part of the blade member, FIGS. 17 (A), (B) and FIG. 18 (note that FIGS. 17 (A), (B) are shown every 360 ° of the spiral blade 126. The blade member 148 is arranged, and as shown in FIG. 18, the blade member 148 is arranged every 180 ° of the spiral blade 126), the blade member 148 is divided at a substantially central portion in the length direction. Also good.

このように、羽根部材148の長さ方向の略中央部で羽根部材148を分断することで、現像器60(図5参照)内の現像剤の量に拘らず、マグネットロール80(図5参照)へ供給する現像剤量と軸方向へ搬送する現像剤量とのバランスを図ることができる。   In this way, by dividing the blade member 148 at the substantially central portion in the length direction of the blade member 148, the magnet roll 80 (see FIG. 5) regardless of the amount of developer in the developing device 60 (see FIG. 5). ) And the amount of developer conveyed in the axial direction can be balanced.

さらに、図19に示すように、羽根部材150、152を、スパイラル羽根126の180°毎に配置すると共に、羽根部材150では搬送面126A側に隙間154を設け、羽根部材152では反搬送面126B側に隙間156を設けても良い。   Further, as shown in FIG. 19, the blade members 150 and 152 are arranged every 180 ° of the spiral blade 126, and the blade member 150 is provided with a gap 154 on the conveying surface 126 </ b> A side, and the blade member 152 is the anti-conveying surface 126 </ b> B. A gap 156 may be provided on the side.

羽根部材150、152によってマグネットロール80へ供給する現像剤は、隙間154、156部分では、それぞれ疎となってしまうが、対面する羽根部材150、152同士で互いに補完し合うことができる。このため、羽根部材150、152によるマグネットロール80への供給において、羽根部材150、152の長さ方向で、現像剤の供給量を略一定にすることができ、より良好な画像が得られる。   The developer supplied to the magnet roll 80 by the blade members 150 and 152 becomes sparse in the gaps 154 and 156, respectively, but the blade members 150 and 152 facing each other can complement each other. For this reason, in the supply to the magnet roll 80 by the blade members 150 and 152, the supply amount of the developer can be made substantially constant in the length direction of the blade members 150 and 152, and a better image can be obtained.

ここで、図20に示すように、対面する羽根部材158と羽根部材160とで、長さを変えても良い。これにより、現像剤をマグネットロール80へ供給する量と軸方向へ搬送する量とのバランスを図ることができる。   Here, as shown in FIG. 20, the length may be changed between the facing blade member 158 and the blade member 160. Thereby, it is possible to achieve a balance between the amount of developer supplied to the magnet roll 80 and the amount conveyed in the axial direction.

なお、ここでは、羽根部材158と羽根部材160とで、長さを変えたが、マグネットロール80(図5参照)へ供給する現像剤量と軸方向へ搬送する現像剤量とのバランスを図ることができれば良いため、羽根部材158、160自体の形状自体を変えても良い。   Here, although the length is changed between the blade member 158 and the blade member 160, the balance between the amount of developer supplied to the magnet roll 80 (see FIG. 5) and the amount of developer conveyed in the axial direction is achieved. Therefore, the shape of the blade members 158 and 160 themselves may be changed.

また、本形態では、スパイラル羽根の外周部と羽根部材の外面とが同一面となるようにしたが、スパイラル羽根に羽根部材を設ければ良いため、スパイラル羽根の外周部と羽根部材の内面とが同一面となるようにしても良く、また、スパイラル羽根の外周部の内側に羽根部材を配置しても良い。   Further, in this embodiment, the outer peripheral portion of the spiral blade and the outer surface of the blade member are flush with each other, but since the blade member may be provided on the spiral blade, May be on the same plane, and a blade member may be arranged inside the outer periphery of the spiral blade.

さらに、本形態では、スパイラルオーガのスパイラル羽根を一重としたが、これに限るものではなく、多重のスパイラル羽根を用いても良い。多重のスパイラル羽根を用いることで、現像剤の軸方向への搬送性を向上させることができる。さらに、スパイラル羽根としてスドーオーガでも適用可能である。また、トナーは球形トナーを用いることで、現像剤の流動性を高めることができるため、本発明ではさらに効果的である。   Furthermore, in this embodiment, the spiral auger has a single spiral blade, but the present invention is not limited to this, and multiple spiral blades may be used. By using multiple spiral blades, the transportability of the developer in the axial direction can be improved. Furthermore, it can also be applied to a suede auger as a spiral blade. In addition, the use of a spherical toner as the toner can improve the fluidity of the developer, which is more effective in the present invention.

本発明の実施形態に係る画像形成装置を示す側面図である。1 is a side view showing an image forming apparatus according to an embodiment of the present invention. 本発明の実施形態に係る画像形成装置に用いた現像器ユニットを示す斜視図である。FIG. 3 is a perspective view showing a developing unit used in the image forming apparatus according to the embodiment of the invention. 本発明の実施形態に係る画像形成装置に用いた現像器ユニットの一部を示す側面図である。FIG. 3 is a side view showing a part of a developing unit used in the image forming apparatus according to the embodiment of the present invention. 本発明の実施形態に係る画像形成装置に用いた現像器ユニットの一部を示す断面図である。FIG. 3 is a cross-sectional view illustrating a part of a developing unit used in the image forming apparatus according to the embodiment of the present invention. 本発明の実施形態に係る画像形成装置に用いた現像器を示す断面図である。FIG. 3 is a cross-sectional view illustrating a developing device used in the image forming apparatus according to the embodiment of the present invention. 本発明の第1実施形態に係るスパイラルオーガを示す斜視図である。1 is a perspective view showing a spiral auger according to a first embodiment of the present invention. 本発明の第1実施形態に係るスパイラルオーガを示す(A)は平面図であり、(B)は正面図である。BRIEF DESCRIPTION OF THE DRAWINGS (A) which shows the spiral auger which concerns on 1st Embodiment of this invention is a top view, (B) is a front view. (A)、(B)は図7(A)、(B)の拡大図である。(A), (B) is an enlarged view of FIG. 7 (A), (B). (A)、(B)は本発明の第1実施形態に係るスパイラルオーガの羽根部材の形状を示す断面図である。(A), (B) is sectional drawing which shows the shape of the blade member of the spiral auger which concerns on 1st Embodiment of this invention. 本発明の第1実施形態に係るスパイラルオーガの羽根部材を示す斜視図である。It is a perspective view which shows the blade | wing member of the spiral auger which concerns on 1st Embodiment of this invention. 本発明の第1実施形態に係るスパイラルオーガの変形例を示す拡大平面図である。It is an enlarged plan view which shows the modification of the spiral auger which concerns on 1st Embodiment of this invention. 本発明の第2実施形態に係るスパイラルオーガを示す(A)は平面図であり、(B)は正面図である。(A) which shows the spiral auger which concerns on 2nd Embodiment of this invention is a top view, (B) is a front view. (A)、(B)は図12(A)、(B)の拡大図である。(A), (B) is an enlarged view of FIG. 12 (A), (B). 本発明の第2実施形態に係るスパイラルオーガの第1変形例を示す拡大平面図である。FIG. 10 is an enlarged plan view showing a first modification of the spiral auger according to the second embodiment of the present invention. 本発明の第2実施形態の第2変形例を示すスパイラルオーガの(A)は拡大平面図であり、(B)は拡大正面図である。(A) of the spiral auger which shows the 2nd modification of 2nd Embodiment of this invention is an enlarged plan view, (B) is an enlarged front view. 本発明の第2実施形態の第3変形例を示すスパイラルオーガの拡大平面図である。It is an enlarged plan view of the spiral auger which shows the 3rd modification of 2nd Embodiment of this invention. 本発明の第2実施形態の第4変形例を示すスパイラルオーガの(A)は拡大平面図であり、(B)は拡大正面図である。(A) of the spiral auger which shows the 4th modification of 2nd Embodiment of this invention is an enlarged plan view, (B) is an enlarged front view. 本発明の第2実施形態の第5変形例を示すスパイラルオーガの拡大平面図である。It is an enlarged plan view of the spiral auger which shows the 5th modification of 2nd Embodiment of this invention. 本発明の第2実施形態の第6変形例を示すスパイラルオーガの拡大平面図である。It is an enlarged plan view of the spiral auger which shows the 6th modification of 2nd Embodiment of this invention. 本発明の第2実施形態の第7変形例を示すスパイラルオーガの拡大平面図である。It is an enlarged plan view of the spiral auger which shows the 7th modification of 2nd Embodiment of this invention. 従来の画像形成装置に用いた現像器を示す断面図である。It is sectional drawing which shows the developing device used for the conventional image forming apparatus.

符号の説明Explanation of symbols

10 画像形成装置
60 現像器
112 スパイラルオーガ(供給部材)
114 スパイラルオーガ(供給部材)
124 回転軸
126 スパイラル羽根
126B 反搬送面
126A 搬送面
128 羽根部材
128A 側面
130 スパイラルオーガ(供給部材)
132 羽根部材
134 隙間
140 スパイラルオーガ(供給部材)
142 羽根部材
144 隙間
148 羽根部材
150 羽根部材
152 羽根部材
154 隙間
156 隙間
158 羽根部材
160 羽根部材
W 幅
h 距離
t 厚み
DESCRIPTION OF SYMBOLS 10 Image forming apparatus 60 Developing device 112 Spiral auger (supply member)
114 Spiral auger (supply member)
124 Rotating shaft 126 Spiral blade 126B Non-transport surface 126A Transport surface 128 Blade member 128A Side surface 130 Spiral auger (supply member)
132 Blade member 134 Clearance 140 Spiral auger (supply member)
142 blade member 144 gap 148 blade member 150 blade member 152 blade member 154 gap 156 gap 158 blade member 160 blade member W width h distance t thickness

Claims (38)

現像剤を搬送して現像剤担持体に現像剤を供給する供給部材が、回転軸と、前記回転軸を中心にスパイラル状に形成されたスパイラル羽根と、で構成され、
現像剤を搬送する前記スパイラル羽根の搬送面と前記搬送面と対面する反搬送面の間へ前記回転軸と平行に羽根部材を架け渡したことを特徴とする画像形成装置。
A supply member that conveys the developer and supplies the developer to the developer carrying member includes a rotating shaft and a spiral blade formed in a spiral shape around the rotating shaft,
An image forming apparatus, wherein a blade member is bridged in parallel with the rotation shaft between a conveying surface of the spiral blade that conveys the developer and an opposite conveying surface facing the conveying surface.
現像剤を搬送して現像剤担持体に現像剤を供給する供給部材が、回転軸と、前記回転軸を中心にスパイラル状に形成されたスパイラル羽根と、で構成され、
現像剤を搬送する前記スパイラル羽根の外周部へ回転軸と平行に羽根部材を架け渡したことを特徴とする画像形成装置。
A supply member that conveys the developer and supplies the developer to the developer carrying member includes a rotating shaft and a spiral blade formed in a spiral shape around the rotating shaft,
An image forming apparatus, wherein a blade member is bridged in parallel with a rotation axis on an outer peripheral portion of the spiral blade that conveys the developer.
前記羽根部材の前記反搬送面側に隙間が設けられたことを特徴とする請求項1又は2に記載の画像形成装置。   The image forming apparatus according to claim 1, wherein a gap is provided on the side opposite to the conveying surface of the blade member. 前記羽根部材の前記搬送面側に隙間が設けられたことを特徴とする請求項1又は2に記載の画像形成装置。   The image forming apparatus according to claim 1, wherein a gap is provided on the conveying surface side of the blade member. 前記羽根部材は、前記回転軸の軸方向に沿った長さ方向の任意の位置で分断されたことを特徴とする請求項1又は2に記載の画像形成装置。   The image forming apparatus according to claim 1, wherein the blade member is divided at an arbitrary position in a length direction along an axial direction of the rotation shaft. 前記羽根部材が前記回転軸を間に置いて対面するように配置されたことを特徴とする請求項1〜5の何れかに記載の画像形成装置。   The image forming apparatus according to claim 1, wherein the blade member is disposed so as to face each other with the rotation shaft interposed therebetween. 現像剤を搬送して現像剤担持体に現像剤を供給する供給部材が、回転軸と、前記回転軸を中心にスパイラル状に形成されたスパイラル羽根と、で構成され、
現像剤を搬送する前記スパイラル羽根の搬送面と前記搬送面と対面する反搬送面の間を架け渡す羽根部材が前記回転軸を間に置いて対面するように配置されると共に、前記羽根部材の一方では搬送面側に隙間を設け、羽根部材の他方では反搬送面側に隙間が設けられたことを特徴とする画像形成装置。
A supply member that conveys the developer and supplies the developer to the developer carrying member includes a rotating shaft and a spiral blade formed in a spiral shape around the rotating shaft,
A blade member that spans between a conveying surface of the spiral blade that conveys the developer and a counter-conveying surface that faces the conveying surface is disposed so as to face the rotation shaft, and the blade member An image forming apparatus, wherein a gap is provided on the conveying surface side on one side and a gap is provided on the non-conveying surface side on the other side of the blade member.
対面する前記羽根部材の形状が異なることを特徴とする請求項6又は7に記載の画像形成装置。   The image forming apparatus according to claim 6, wherein shapes of the blade members facing each other are different. 前記羽根部材を側面視したとき、羽根部材の先端部が、外面から内面へ向かって鋭角に切断されていることを特徴とする請求項3〜8の何れかに記載の画像形成装置。   The image forming apparatus according to claim 3, wherein when the blade member is viewed from the side, a tip end portion of the blade member is cut at an acute angle from the outer surface toward the inner surface. 前記羽根部材の回転方向側の側面が、前記搬送面側から前記反搬送面側へ向かう下り勾配となっていることを特徴とする請求項1〜9の何れかに記載の画像形成装置。   10. The image forming apparatus according to claim 1, wherein a side surface of the blade member on the rotation direction side has a downward gradient from the conveyance surface side toward the counter conveyance surface side. 前記回転軸と直交する面で前記羽根部材を切断したときの断面は、前記羽根部材の回転方向側が薄くなっていることを特徴とする請求項1〜10の何れかに記載の画像形成装置。   The image forming apparatus according to claim 1, wherein a cross section of the blade member cut along a plane orthogonal to the rotation axis is thin on a rotation direction side of the blade member. 前記隙間は、前記羽根部材を平面視したとき、回転方向へ向かう側が広くなっていることを特徴とする請求項3〜11の何れかに記載の画像形成装置。   12. The image forming apparatus according to claim 3, wherein the gap is wide on a side toward the rotation direction when the blade member is viewed in plan. 1≦(前記回転軸から前記羽根部材の内面までの距離)/前記羽根部材の厚み≦3.5の関係が成立することを特徴とする請求項1〜12の何れかに記載の画像形成装置。   The image forming apparatus according to claim 1, wherein a relationship of 1 ≦ (distance from the rotation shaft to the inner surface of the blade member) / thickness of the blade member ≦ 3.5 is satisfied. . 前記隙間の最小値が1.5mm以下であることを特徴とする請求項12又は13に記載の画像形成装置。   The image forming apparatus according to claim 12, wherein a minimum value of the gap is 1.5 mm or less. 前記羽根部材の最大幅が回転軸を中心とする35°以下の弧であることを特徴とする請求項1〜14の何れかに記載の画像形成装置。   The image forming apparatus according to claim 1, wherein a maximum width of the blade member is an arc of 35 ° or less centering on a rotation axis. 前記スパイラル羽根の外周部と前記羽根部材の外面とが同一面であることを特徴とする請求項1〜15の何れかに記載の画像形成装置。   The image forming apparatus according to claim 1, wherein an outer peripheral portion of the spiral blade and an outer surface of the blade member are the same surface. 前記スパイラル羽根が多重スパイラルで構成されたことを特徴とする請求項1〜16の何れかに記載の画像形成装置。   The image forming apparatus according to claim 1, wherein the spiral blade is formed of multiple spirals. 前記スパイラル羽根がスドーオーガで構成されたことを特徴とする請求項1〜17の何れかに記載の画像形成装置。   The image forming apparatus according to claim 1, wherein the spiral blade is formed of a suede auger. 球形トナーを用いた2成分現像方式であることを特徴とする請求項1〜18の何れかに記載の画像形成装置。   The image forming apparatus according to claim 1, wherein the image forming apparatus is a two-component developing system using a spherical toner. 回転軸と、
前記回転軸を中心にスパイラル状に形成され、現像剤を搬送するスパイラル羽根と、
前記スパイラル羽根の搬送面と前記搬送面と対面する反搬送面の間へ前記回転軸と平行に架け渡された羽根部材と、
を有することを特徴とする供給部材。
A rotation axis;
Spiral blades that are formed in a spiral shape around the rotation axis and convey the developer;
A blade member spanned in parallel with the rotating shaft between the conveying surface of the spiral blade and the opposite conveying surface facing the conveying surface;
A supply member comprising:
回転軸と、
前記回転軸を中心にスパイラル状に形成され、現像剤を搬送するスパイラル羽根と、
前記スパイラル羽根の外周部へ回転軸と平行に架け渡された羽根部材と、
を有することを特徴とする供給部材。
A rotation axis;
Spiral blades that are formed in a spiral shape around the rotation axis and convey the developer;
A blade member spanned in parallel with the rotation axis to the outer periphery of the spiral blade;
A supply member comprising:
前記羽根部材の前記反搬送面側に隙間が設けられたことを特徴とする請求項20又は21に記載の供給部材。   The supply member according to claim 20 or 21, wherein a gap is provided on the side opposite to the conveying surface of the blade member. 前記羽根部材の前記搬送面側に隙間が設けられたことを特徴とする請求項20又は21に記載の供給部材。   The supply member according to claim 20 or 21, wherein a gap is provided on the conveying surface side of the blade member. 前記羽根部材は、前記回転軸の軸方向に沿った長さ方向の任意の位置で分断されたことを特徴とする請求項20又は21に記載の供給部材。   The supply member according to claim 20 or 21, wherein the blade member is divided at an arbitrary position in a length direction along an axial direction of the rotation shaft. 前記羽根部材が前記回転軸を間に置いて対面するように配置されたことを特徴とする請求項20〜24の何れかに記載の供給部材。   The supply member according to any one of claims 20 to 24, wherein the blade member is disposed so as to face each other with the rotation shaft interposed therebetween. 回転軸と、
前記回転軸を中心にスパイラル状に形成され、現像剤を搬送するスパイラル羽根と、
前記スパイラル羽根の搬送面と前記搬送面と対面する反搬送面の間に架け渡されると共に、前記回転軸を間に置いて対面するように配置された羽根部材と、
で構成され、
前記羽根部材の一方では搬送面側に隙間を設け、羽根部材の他方では反搬送面側に隙間が設けられたことを特徴とする供給部材。
A rotation axis;
Spiral blades that are formed in a spiral shape around the rotation axis and convey the developer;
A blade member that is bridged between a conveying surface of the spiral blade and a counter-conveying surface that faces the conveying surface, and is disposed so as to face the rotating shaft in between,
Consists of
One of the blade members is provided with a gap on the conveying surface side, and the other blade member is provided with a gap on the non-conveying surface side.
対面する前記羽根部材の形状が異なることを特徴とする請求項25又は26に記載の供給部材。   The supply member according to claim 25 or 26, wherein the shape of the facing blade member is different. 前記羽根部材を側面視したとき、羽根部材の先端部が、外面から内面へ向かって鋭角に切断されていることを特徴とする請求項22〜27の何れかに記載の供給部材。   The supply member according to any one of claims 22 to 27, wherein when the blade member is viewed from the side, a tip end portion of the blade member is cut at an acute angle from the outer surface toward the inner surface. 前記羽根部材の回転方向側の側面が、前記搬送面側から前記反搬送面側へ向かう下り勾配となっていることを特徴とする請求項20〜28の何れかに記載の供給部材。   The supply member according to any one of claims 20 to 28, wherein a side surface on the rotational direction side of the blade member has a downward slope from the transport surface side to the counter-transport surface side. 前記回転軸と直交する面で前記羽根部材を切断したときの断面は、前記羽根部材の回転方向側が薄くなっていることを特徴とする請求項20〜29の何れかに記載の供給部材。   The supply member according to any one of claims 20 to 29, wherein a cross section of the blade member cut along a plane orthogonal to the rotation axis is thin on a rotation direction side of the blade member. 前記隙間は、前記羽根部材を平面視したとき、回転方向へ向かう側が広くなっていることを特徴とする請求項22〜30の何れかに記載の供給部材。   The supply member according to any one of claims 22 to 30, wherein the gap has a wider side toward the rotation direction when the blade member is viewed in plan. 1≦(前記回転軸から前記羽根部材の内面までの距離)/前記羽根部材の厚み≦3.5の関係が成立することを特徴とする請求項20〜31の何れかに記載の供給部材。   32. The supply member according to claim 20, wherein a relationship of 1 ≦ (distance from the rotating shaft to the inner surface of the blade member) / thickness of the blade member ≦ 3.5 is established. 前記隙間の最小値が1.5mm以下であることを特徴とする請求項31又は32に記載の供給部材。   The minimum value of the said clearance gap is 1.5 mm or less, The supply member of Claim 31 or 32 characterized by the above-mentioned. 前記羽根部材の最大幅が回転軸を中心とする35°以下の弧であることを特徴とする請求項20〜33の何れかに記載の供給部材。   The supply member according to any one of claims 20 to 33, wherein a maximum width of the blade member is an arc of 35 ° or less centering on a rotation axis. 前記スパイラル羽根の外周部と前記羽根部材の外面とが同一面であることを特徴とする請求項20〜34の何れかに記載の供給部材。   The supply member according to any one of claims 20 to 34, wherein an outer peripheral portion of the spiral blade and an outer surface of the blade member are the same surface. 前記スパイラル羽根が多重スパイラルで構成されたことを特徴とする請求項20〜35の何れかに記載の供給部材。   36. The supply member according to any one of claims 20 to 35, wherein the spiral blade is formed of multiple spirals. 前記スパイラル羽根がスドーオーガで構成されたことを特徴とする請求項20〜36の何れかに記載の供給部材。   The supply member according to any one of claims 20 to 36, wherein the spiral blade is formed of a suede auger. 請求項20〜37の何れかに記載の供給部材を備えたことを特徴とする現像器。   A developing device comprising the supply member according to any one of claims 20 to 37.
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Cited By (5)

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JP2010145618A (en) * 2008-12-17 2010-07-01 Konica Minolta Business Technologies Inc Developing apparatus and image forming apparatus using the same
JP2011137870A (en) * 2009-12-25 2011-07-14 Samsung Electronics Co Ltd Developing device and image forming apparatus
JP2011158577A (en) * 2010-01-29 2011-08-18 Ricoh Co Ltd Developing device, process unit, and image forming apparatus
JP2012032718A (en) * 2010-08-02 2012-02-16 Sharp Corp Development device and image forming apparatus
US20140023403A1 (en) * 2012-07-20 2014-01-23 Kyocera Document Solutions Inc. Developer conveyance device, development device, and image forming apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010145618A (en) * 2008-12-17 2010-07-01 Konica Minolta Business Technologies Inc Developing apparatus and image forming apparatus using the same
JP2011137870A (en) * 2009-12-25 2011-07-14 Samsung Electronics Co Ltd Developing device and image forming apparatus
US8824933B2 (en) 2009-12-25 2014-09-02 Samsung Electronics Co., Ltd. Developing device and image forming apparatus including the same
KR101777345B1 (en) 2009-12-25 2017-09-11 에스프린팅솔루션 주식회사 Developing device and Image forming apparatus having the same
JP2011158577A (en) * 2010-01-29 2011-08-18 Ricoh Co Ltd Developing device, process unit, and image forming apparatus
JP2012032718A (en) * 2010-08-02 2012-02-16 Sharp Corp Development device and image forming apparatus
US20140023403A1 (en) * 2012-07-20 2014-01-23 Kyocera Document Solutions Inc. Developer conveyance device, development device, and image forming apparatus
US9104136B2 (en) * 2012-07-20 2015-08-11 Kyocera Document Solutions Inc. Developer conveyance device, development device, and image forming apparatus

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