JP5036493B2 - Suction type uniaxial eccentric screw pump, powder toner conveying device, image forming device - Google Patents

Suction type uniaxial eccentric screw pump, powder toner conveying device, image forming device Download PDF

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JP5036493B2
JP5036493B2 JP2007288659A JP2007288659A JP5036493B2 JP 5036493 B2 JP5036493 B2 JP 5036493B2 JP 2007288659 A JP2007288659 A JP 2007288659A JP 2007288659 A JP2007288659 A JP 2007288659A JP 5036493 B2 JP5036493 B2 JP 5036493B2
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screw pump
rotor
eccentric screw
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powder
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JP2009114955A (en
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孝幸 玉木
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Ricoh Co Ltd
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Description

本発明は吸引型1軸偏芯スクリューポンプ、粉体トナー搬送装置、画像形成装置に関する The present invention is related suction type 1 Jikuhenshin screw pump, the powder toner transporting apparatus, the image forming apparatus.

特許文献1には、粉体トナー収納容器に振動を与え、トナーの流動化を促進させるものが記載されている。即ち、特許文献1には、粉体トナーを、フレキシブルな素材で作成され60%以上減容可能な容器に充填し、この容器に充填されたトナーを吸引ポンプによって空気流とともに吸引し輸送して、画像形成装置の現像部に導くに当たって、該粉体トナーは着色母体粒子及び外添加剤で構成され、粉体トナーが収納されているトナー収納手段に振動又は衝撃を与えて該粉体トナーの流動化を促進させるものが記載されている。   Japanese Patent Application Laid-Open No. H10-260260 describes a device that applies vibration to a powder toner storage container to promote toner fluidization. That is, in Patent Document 1, powder toner is filled in a container made of a flexible material and capable of reducing volume by 60% or more, and the toner filled in the container is sucked together with an air flow by a suction pump and transported. When the powder toner is guided to the developing unit of the image forming apparatus, the powder toner is composed of colored base particles and an external additive. What promotes fluidization is described.

また、特許文献2には、搬送経路を揺動してトナーの架橋状態の発生を防止するものが記載されている。即ち、特許文献2には、クリーニング手段により回収した回収トナー又は補給された新規のトナーを吐出する吐出手段5と、吐出手段の吐出口から吐出されたトナーを排出する排出手段と、吐出口から吐出されたトナーを斜め下方に配置された排出口に搬送するように斜め下方へ傾斜して配置された搬送ハウジングと、搬送ハウジング内に形成されて吐出口から斜め下方に配置された排出口にトナーを搬送するトナー搬送経路と、トナー搬送経路を揺動してトナーの架橋状態の発生を防止する揺動手段と、揺動手段を揺動駆動する揺動駆動手段とトナー搬送経路を塞ぐ様に配置されたトナー濾し部材と、からなるものが記載されている。
特開2002−006536 特開2001−154556
Japanese Patent Application Laid-Open No. H10-228561 describes a technique for preventing the occurrence of a crosslinked state of toner by swinging the conveyance path. That is, Patent Document 2 discloses a discharge unit 5 that discharges the collected toner collected by the cleaning unit or a replenished new toner, a discharge unit that discharges the toner discharged from the discharge port of the discharge unit, and a discharge port. A transport housing that is disposed obliquely downward so as to convey the discharged toner to a discharge port disposed obliquely below, and a discharge port that is formed in the conveyance housing and disposed obliquely downward from the discharge port. A toner transport path for transporting toner, swing means for swinging the toner transport path to prevent the occurrence of a crosslinked state of the toner, swing drive means for swinging the swing means, and the toner transport path And a toner filtering member arranged in the above.
JP2002006536 JP 2001-154556 A

ところで、上述した従来の技術においては、粉体収納容器に振動又は揺動を与えて粉体トナーの流動化を促進させるため、振動発生源や、揺動発生源を別個に設ける必要があり、装置の構成部材の点数が増えたり、振動付加タイミングの制御を行うための手段を別に設けたりする必要がありコストが嵩むという問題がある。   By the way, in the above-described conventional technology, it is necessary to separately provide a vibration generation source and a vibration generation source in order to promote the fluidization of the powder toner by applying vibration or vibration to the powder container. There is a problem in that the number of constituent members of the apparatus increases and a means for controlling the vibration application timing needs to be provided separately, which increases costs.

そこで本発明は、別部材としての振動揺動発生手段を設けることなく、粉体の凝集体を崩すことができ搬送経路全体に生じる隙間を埋めて、粉体搬送できなくなる状態の発生を防止できる吸引型1軸偏芯スクリューポンプ、粉体トナー搬送装置、画像形成装置を提供することを目的とする。   Therefore, the present invention can prevent the occurrence of a state in which powder cannot be conveyed by providing a vibration oscillation generating means as a separate member and breaking the powder agglomerates and filling the gaps formed in the entire conveyance path. An object of the present invention is to provide a suction type single-shaft eccentric screw pump, a powder toner conveying device, and an image forming apparatus.

請求項1の発明は、
画像形成装置において粉体収納容器から搬送経路を介して粉体を吸引して現像装置に搬送する吸引型1軸偏芯スクリューポンプであって、
雌ネジ状で螺旋状の穴部を備えたステータと、前記螺旋状の穴内に配置され駆動源に接続された駆動軸で回転駆動される雄ネジ状のロータと、
これらステータとロータを収容し、かつ前記搬送経路を介して搬送された粉体が吸引される吸引口を備えたハウジングと、
を備え
前記ロータの外径寸法で定まるロータ外径中心と、前記ステータの穴部内径寸法から定まるステータ内径中心との偏芯量が、前記駆動軸の軸芯と前記ロータ外径中心との偏芯量よりも大きく設定され
前記ロータの回転により前記ステータ及び前記ハウジングを振動させる、
ことを特徴とする吸引型1軸偏芯スクリューポンプである。
The invention of claim 1
A suction-type single-axis eccentric screw pump that sucks powder from a powder container through a conveyance path and conveys it to a developing device in an image forming apparatus,
A stator having a helical hole in the female screw shape, and the spiral is disposed in the bore male screw shaped rotor which is driven to rotate the connected drive shaft to the drive source,
A housing that houses the stator and the rotor and includes a suction port through which the powder transported through the transport path is sucked;
With
Eccentricity of the rotor outside diameter central determined by the outer diameter of the rotor, eccentricity of the stator inner diameter center determined from hole inner diameter of the stator, and the axis of the front SL drive shaft the rotor outer diameter center is set larger than the amount,
The stator and the housing are vibrated by rotation of the rotor;
This is a suction type single-shaft eccentric screw pump.

請求項2の発明は、請求項1記載の吸引型1軸偏芯スクリューポンプにおいて、前記ロータと前記駆動軸とが1部品として構成されていることを特徴とした。   According to a second aspect of the present invention, in the suction type single-shaft eccentric screw pump according to the first aspect, the rotor and the drive shaft are configured as one part.

請求項3の発明は、請求項1又は2記載の吸引型1軸偏芯スクリューポンプにおいて、前記ステータはハウジング内に配置され、前記搬送経路の少なくとも一部は前記ハウジングと一体として形成されていることを特徴とする。   According to a third aspect of the present invention, in the suction type single-shaft eccentric screw pump according to the first or second aspect, the stator is disposed in the housing, and at least a part of the transport path is formed integrally with the housing. It is characterized by that.

請求項4の発明は、請求項1乃至3のいずれか記載の吸引型1軸偏芯スクリューポンプにおいて、前記吸と前記粉体収納容器と剛性的に接続されていることを特徴とする。 A fourth aspect of the present invention, the suction type 1 Jikuhenshin screw pump according to any one of claims 1 to 3, and wherein the Aspirate port and said powder container is rigidly connected To do.

請求項5の発明は、請求項1乃至4のいずれか記載の吸引型1軸偏芯スクリューポンプにおいて、前記駆動源を駆動制御する駆動制御装置を備え、駆動制御装置は駆動源によるロータの1回の駆動回転角度を180°以上とすることを特徴とする。   According to a fifth aspect of the present invention, in the suction type single-shaft eccentric screw pump according to any one of the first to fourth aspects, a drive control device that drives and controls the drive source is provided. The drive rotation angle is set to 180 ° or more.

請求項6の発明は、請求項1乃至5いずれか記載の吸引型1軸偏芯スクリューポンプにおいて、前記現像装置とは柔的に結合されていることを特徴とする。 According to a sixth aspect of the present invention, in the suction type single-shaft eccentric screw pump according to any one of the first to fifth aspects, the developing device is flexibly coupled.

請求項7の発明は、請求項1乃至6のいずれか記載の吸引型1軸偏芯スクリューポンプを備えていることを特徴とする粉体トナー搬送装置である。   A seventh aspect of the present invention is a powder toner conveying device comprising the suction type single-shaft eccentric screw pump according to any one of the first to sixth aspects.

請求項8の発明は、請求項7記載の粉体トナー搬送装置を備えることを特徴とする画像形成装置である。   According to an eighth aspect of the present invention, there is provided an image forming apparatus comprising the powder toner conveying device according to the seventh aspect.

本発明によれば、吸引型1軸偏芯スクリューポンプに別個の部材装置を取り付けることなく、トナーが経路内の一部に凝集し、空気の通り道ができ、粉体搬送できなくなる状態を解決できるという効果がある。   According to the present invention, it is possible to solve the state in which the toner is aggregated in a part of the path, the air passage is formed, and the powder cannot be conveyed without attaching a separate member device to the suction type single-shaft eccentric screw pump. There is an effect.

以下本発明を実施するための最良の形態としての実施例を図面に基づいて説明する。   Embodiments as the best mode for carrying out the present invention will be described below with reference to the drawings.

以下実施例として、本発明を粉体トナー搬送装置を備えた画像形成装置に適用した場合について説明する。図1は実施例に係る粉体トナー搬送装置の構成を示す概略断面図である。本例は、従来公知の電子写真法による画像形成装置の現像装置1により不図示の感光体にトナー像を形成する。現像装置1には、その一部に吸引型1軸偏芯スクリューポンプ2を具備し、吸引型粉体ポンプである吸引型1軸偏芯スクリューポンプ2の作動により現像装置1内にトナーが供給される。   As an example, a case where the present invention is applied to an image forming apparatus provided with a powder toner conveying device will be described below. FIG. 1 is a schematic cross-sectional view illustrating a configuration of a powder toner conveying device according to an embodiment. In this example, a toner image is formed on a photosensitive member (not shown) by a developing device 1 of a conventionally known electrophotographic image forming apparatus. The developing device 1 includes a suction type uniaxial eccentric screw pump 2 in a part thereof, and toner is supplied into the developing device 1 by the operation of the suction type uniaxial eccentric screw pump 2 which is a suction type powder pump. Is done.

図2は実施例に係る吸引型1軸偏芯スクリューポンプの構成を示す概略断面図である。吸引型1軸偏芯スクリューポンプ2は、金属などの剛性をもつ材料で偏芯したスクリュー形状につくられたロータ2d、ゴム材料で内側が2条のスクリュー形状に成形され、固定設置されるステータ2b、これらを包みかつ粉体の移送路を形成する樹脂材料などで成形されたハウジング2cよりなる。ロータ2dは、駆動モータ2eに駆動軸2aと一体に形成されている。また、ハウジング2cにはトナー収納容器3から吸引型1軸偏芯スクリューポンプ2へ粉体トナーを搬送する搬送経路2fが一体に形成されている。また、本例ででは、吸引型1軸偏芯スクリューポンプ2は、前記搬送経路2f及び吸引口以外の部位で粉体トナー搬送装置に固定される。   FIG. 2 is a schematic cross-sectional view illustrating the configuration of the suction type single-shaft eccentric screw pump according to the embodiment. The suction-type single-shaft eccentric screw pump 2 includes a rotor 2d formed in a screw shape that is eccentric with a rigid material such as metal, and a stator that is molded into a screw shape with two inner parts made of rubber and fixedly installed. 2b, and a housing 2c formed of a resin material that wraps these and forms a powder transfer path. The rotor 2d is formed integrally with the drive shaft 2a in the drive motor 2e. The housing 2c is integrally formed with a conveyance path 2f for conveying the powder toner from the toner storage container 3 to the suction type uniaxial eccentric screw pump 2. In this example, the suction type uniaxial eccentric screw pump 2 is fixed to the powder toner conveying device at a portion other than the conveying path 2f and the suction port.

このような吸引型1軸偏芯スクリューポンプ2では、駆動モータ2eの回転駆動によるロータ2dの回転により強い自吸力(吸引圧)が生じ、トナー収納容器3から合部(ノズル)6を通してトナーを吸引することが可能となる(図1参照)。 In such suction type 1 Jikuhenshin screw pump 2, strong self-sucking force (suction pressure) is generated by the rotation of the rotor 2d according to rotation of the driving motor 2e, the toner through engagement portion (nozzle) 6 fitted from the toner container 3 Can be sucked (see FIG. 1).

このようなトナー供給装置の駆動、制御は、従来公知の現像剤濃度検知・制御方式を用いている。これは現像装置の一部に設けられた不図示の透磁率検出器に基づき現像装置内のトナーとキャリアの混合比の変化を検知し、トナー量が少ないと検知されると粉体ポンプの駆動軸2aが回転駆動し吸引型1軸偏芯スクリューポンプ2が作動する。粉体ポンプにより現像装置内に移送されてきたトナーがある一定量以上となると透磁率検出器の信号にて駆動を遮断し粉体ポンプの作動を停止する。これ以外の方法として感光体上のトナー像の反射濃度を検知し同様のトナー補給量を制御する方法等、従来周知の技術を転用することも可能である。   Such a toner supply device is driven and controlled using a conventionally known developer concentration detection / control system. This is based on a permeability detector (not shown) provided in a part of the developing device, and detects a change in the mixing ratio of toner and carrier in the developing device. When the amount of toner is detected, the powder pump is driven. The shaft 2a is rotationally driven, and the suction type single shaft eccentric screw pump 2 is operated. When the toner transferred into the developing device by the powder pump exceeds a certain amount, the drive is shut off by the signal of the magnetic permeability detector and the operation of the powder pump is stopped. As other methods, conventionally known techniques such as a method of detecting the reflection density of the toner image on the photosensitive member and controlling the same toner replenishment amount can be used.

トナー搬送部材であるチューブ4は、内径φ4〜10のチューブ状で、フレキシブルでかつ耐トナー性に優れたゴム材料(exポリウレタン、ニトリル、EPDM、シリコン等)やプラスチック材料(ポリエチレン、ナイロン等)を用いることが非常に有効である。   The tube 4 which is a toner conveying member is a tube having an inner diameter of 4 to 10 and is made of a flexible rubber material having excellent toner resistance (ex polyurethane, nitrile, EPDM, silicon, etc.) or a plastic material (polyethylene, nylon, etc.). It is very effective to use.

吸引されたトナーは、現像装置1の一部に設けられたトナー導入孔1aから、現像装置内に落下し、さらに不図示の撹拌スクリューにより現像部に移送される。2成分現像方式を用いた場合は、この移送行程中に補給されたトナー(吸引されたトナー)は現像装置内の現像剤と撹拌・混合され、均一な剤濃度と適正な帯電量となる。   The sucked toner falls from the toner introduction hole 1a provided in a part of the developing device 1 into the developing device, and is further transferred to the developing unit by a stirring screw (not shown). When the two-component development method is used, the toner replenished during the transfer process (sucked toner) is agitated and mixed with the developer in the developing device to obtain a uniform agent concentration and an appropriate charge amount.

本例に係る吸引型1軸偏芯スクリューポンプ2では、ロータ2dの回転駆動により吸引型1軸偏芯スクリューポンプ2自体に振動が生じるよう構成されている。以下この振動丹生のメカニズムについて説明する。図3は吸引型1軸偏芯スクリューポンプのロータとステータの関係を示す図2中A−A線に相当する断面図、図4は一般的な吸引型1軸偏芯スクリューポンプを示す概略断面図である。   The suction type uniaxial eccentric screw pump 2 according to this example is configured such that vibration is generated in the suction type uniaxial eccentric screw pump 2 itself by the rotational drive of the rotor 2d. The mechanism of this vibration Niu is described below. 3 is a cross-sectional view corresponding to the line AA in FIG. 2 showing the relationship between the rotor and the stator of the suction type uniaxial eccentric screw pump, and FIG. 4 is a schematic cross section showing a general suction type uniaxial eccentric screw pump. FIG.

吸引型1軸偏芯スクリューポンプ2において、ロータ2dの外径で定まるロータ外径中心O1と、ステータ2bの穴部の内径から定まる内径中心O2とは偏芯量d1を隔てて配置される。また、本例に係る吸引型1軸偏芯スクリューポンプ2では、ロータ2dと駆動軸2aとは略同軸となるように一体に形成されている。即ち、ロータ2dの外径で定まるロータの外径中心O1と駆動軸中心O3との偏芯量d2は微少(本例の場合ほとんど0にとなる)であり、前記ロータ外径中心O1と穴部内径中心O2とまでの偏芯量d1より小さいものとなっている。   In the suction type single-shaft eccentric screw pump 2, the rotor outer diameter center O1 determined by the outer diameter of the rotor 2d and the inner diameter center O2 determined from the inner diameter of the hole of the stator 2b are arranged with an eccentricity d1 therebetween. Further, in the suction type single-shaft eccentric screw pump 2 according to this example, the rotor 2d and the drive shaft 2a are integrally formed so as to be substantially coaxial. That is, the eccentric amount d2 between the rotor outer diameter center O1 and the drive shaft center O3 determined by the outer diameter of the rotor 2d is very small (in this example, it is almost 0). It is smaller than the eccentric amount d1 up to the inner diameter center O2.

このため、実施例に係る吸引型1軸偏芯スクリューポンプ2は、ロータ2dと駆動軸2aとは同軸で回転するので、ロータ外径中心O1は移動せず、ステータ2bはロータ2dに倣うように移動し、このステータ2bの移動により、駆動軸2aよりも剛性の低いハウジング2cを撓ませ、吸引型1軸偏芯スクリューポンプ2の振動を引き起こす。そしてこの振動は、吸引型1軸偏芯スクリューポンプ2に併設して一体化した搬送経路に伝わり、粉体トナーの凝集を崩すことができる。   Therefore, in the suction type single-shaft eccentric screw pump 2 according to the embodiment, the rotor 2d and the drive shaft 2a rotate on the same axis, so that the rotor outer diameter center O1 does not move, and the stator 2b follows the rotor 2d. The movement of the stator 2b causes the housing 2c, which is less rigid than the drive shaft 2a, to bend, and causes the suction type uniaxial eccentric screw pump 2 to vibrate. This vibration is transmitted to the conveying path integrated with the suction-type single-shaft eccentric screw pump 2 so that the aggregation of the powder toner can be broken.

これに対して、図4に示すような、一般的な吸引型1軸偏芯スクリューポンプ12では、ロータ12dが駆動軸12aに変位許容量がd3(d3>d1)である自在接手12gを介して接続されているため、ロータ12dがステータ12bの形状に倣って回転する。このため、ロータ12dの外径中心が移動して、ステータ12bは移動せず、振動は発生しない。   On the other hand, in a general suction type single-shaft eccentric screw pump 12 as shown in FIG. 4, the rotor 12d is connected to the drive shaft 12a via a universal joint 12g whose allowable displacement is d3 (d3> d1). Therefore, the rotor 12d rotates following the shape of the stator 12b. For this reason, the outer diameter center of the rotor 12d moves, the stator 12b does not move, and vibration does not occur.

発明者は、ロータを駆動軸と一体化したとき、駆動軸に対してやや自由度があるとき、駆動軸にフレキシブルなときの3つの形態で吸引型1軸偏芯スクリューポンプの端部振幅を測定した。図5は吸引型1軸偏芯スクリューポンプの振動の振幅の測定結果を示すグラフである。図5では、横軸がロータ外径中心の移動可能量、縦軸がスクリューポンプの端部での振幅を示している。図5によれば、ロータ外径中心移動可能量が小さいほど、スクリューポンプの振幅が大きくなることが分かる。   The inventor determines the end amplitude of the suction type single-shaft eccentric screw pump in three forms when the rotor is integrated with the drive shaft, when there is some degree of freedom with respect to the drive shaft, and when the drive shaft is flexible. It was measured. FIG. 5 is a graph showing the measurement results of the vibration amplitude of the suction type single-shaft eccentric screw pump. In FIG. 5, the horizontal axis indicates the movable amount at the center of the rotor outer diameter, and the vertical axis indicates the amplitude at the end of the screw pump. According to FIG. 5, it can be seen that the smaller the rotor outer diameter center movable amount is, the larger the amplitude of the screw pump is.

以上説明したように、本例に係る吸引型1軸偏芯スクリューポンプによれば、ロータ外径中心がステータ外形中心から偏芯して回転するので、ステータを含むポンプ全体が相対的に移動し、ポンプ全体を振動させることができる。このため、振動が接続された搬送経路に伝達し搬送経路内にある粉体の凝集を崩すことができる。また、この振動は、ポンプによって引き起こされるものであるため、凝集体を崩すための振動源を併設して駆動タイミングを制御する必要がない。   As described above, according to the suction type single-shaft eccentric screw pump according to this example, the rotor outer diameter center rotates eccentrically from the stator outer shape center, so that the entire pump including the stator relatively moves. The whole pump can be vibrated. For this reason, vibration is transmitted to the connected conveyance path, and the aggregation of the powder in the conveyance path can be broken. Moreover, since this vibration is caused by the pump, it is not necessary to control the drive timing by providing a vibration source for breaking the aggregate.

また、本例によれば、ロータと駆動軸とが一体で同軸に形成されているので、ポンプの振幅は最大となり、より大きな振動を搬送経路に伝達することができる。なお、ロータと駆動軸との間の偏芯可能な量が前記偏芯量d1より小さくできれば、ロータと駆動軸とを直結せず、接手部材を用いて接合することができる。   Further, according to this example, since the rotor and the drive shaft are integrally formed coaxially, the amplitude of the pump is maximized and larger vibrations can be transmitted to the conveyance path. If the amount of eccentricity between the rotor and the drive shaft can be made smaller than the eccentric amount d1, the rotor and the drive shaft can be joined using a joint member without being directly connected.

また、本例によれば、吸引型1軸偏芯スクリューポンプ2に搬送経路2fを一体に形成しているので、搬送経路2fへの振動の伝達率を高くし、搬送経路2fにある粉体トナーの凝集を効率よく崩すことができる。   Further, according to this example, since the conveyance path 2f is integrally formed with the suction type single-shaft eccentric screw pump 2, the transmission rate of vibration to the conveyance path 2f is increased, and the powder in the conveyance path 2f is increased. Toner aggregation can be efficiently broken down.

なお、上記例では、吸引型1軸偏芯スクリューポンプ2とトナー収納容器3とをチューブ4で接合した例を示したが、吸引型1軸偏芯スクリューポンプの吸入口と粉体収納容器と剛性的に接続すれば、粉体収納容器に振動を伝達して、粉体収納容器内の凝集を崩し、経路内で凝集してしまうのを防止することができる。   In the above example, the suction type uniaxial eccentric screw pump 2 and the toner storage container 3 are joined by the tube 4. However, the suction port of the suction type uniaxial eccentric screw pump and the powder storage container If rigidly connected, vibrations can be transmitted to the powder container, so that aggregation in the powder container can be broken and aggregation in the path can be prevented.

また、本発明では、モータを駆動制御する駆動制御装置を備えて、駆動源によるロータの1回の駆動回転角度を180°以上とすることができ、このようにすることで、ロータを半周期以上回転させ、吸引型1軸偏芯スクリューポンプ2を少なくとも片振幅だけ振動させることができる。   Further, in the present invention, a drive control device for driving and controlling the motor is provided, and a single drive rotation angle of the rotor by the drive source can be set to 180 ° or more. The suction type uniaxial eccentric screw pump 2 can be vibrated by at least one amplitude by rotating it as described above.

また、本発明では、搬送経路に接続された粉体が搬送される容器即ち現像装置1と柔的に結合することができる。即ち、粉体搬送装置と現像装置の連結部は、ポロンや目の細かいスポンジシールなどで柔結合することが好適である。吸引型1軸偏芯スクリューポンプと画像形世相値本体とを剛結合してしまうと、現像装置に振動が伝達してしまい画像にバンディングなどの悪影響を及ぼす他、隙間から粉体トナーが飛散する恐れがあり、このようにすれば、不具合を解消できる。   Further, in the present invention, the powder connected to the transport path can be flexibly coupled to the container in which the powder is transported, that is, the developing device 1. In other words, it is preferable that the connecting portion between the powder conveying device and the developing device is softly connected with a porous seal or a fine sponge seal. If the suction-type single-shaft eccentric screw pump and the image shape phase value main body are rigidly coupled, vibration is transmitted to the developing device, which adversely affects the image, such as banding, and powder toner scatters from the gap. If you do this, you can eliminate the problem.

以上は粉体の中でも特に複写機などの画像形成装置に用いられる新規トナーを搬送、供給する場合について述べてきたが、近年の環境問題、資源のリサイクル化という種々の要請を満たすために、回収した残留トナーを再度現像装置に戻して現像剤としてリサイクルするためのトナーリサイクル機構が種々提案されている。リサイクルしたトナーの方が、劣化して流れ難くなる傾向があり、凝集しやすいため、本発明の粉体ポンプや粉体補給装置、画像形成装置がこれらリサイクルトナーを対象としていることは言うまでもない。   The above has described the case of transporting and supplying new toners used in image forming apparatuses such as copiers, among other powders. However, in order to meet various environmental issues and various demands for resource recycling in recent years, they are collected. Various toner recycling mechanisms for returning the residual toner to the developing device and recycling it as a developer have been proposed. Recycled toner tends to deteriorate and become difficult to flow, and is likely to agglomerate. Needless to say, the powder pump, powder replenishing device, and image forming apparatus of the present invention are intended for these recycled toners.

実施例に係る粉体トナー搬送装置の構成を示す概略断面図である。It is a schematic sectional drawing which shows the structure of the powder toner conveying apparatus which concerns on an Example. 実施例に係る吸引型1軸偏芯スクリューポンプの構成を示す概略断面図である。It is a schematic sectional drawing which shows the structure of the suction type single axis | shaft eccentric screw pump which concerns on an Example. 吸引型1軸偏芯スクリューポンプのロータとステータの関係を示す図2中A−A線に相当する断面図である。It is sectional drawing equivalent to the AA line in FIG. 2 which shows the relationship between the rotor and stator of a suction type single axis | shaft eccentric screw pump. 一般的な吸引型1軸偏芯スクリューポンプを示す概略断面図である。It is a schematic sectional drawing which shows a general suction type single axis | shaft eccentric screw pump. 吸引型1軸偏芯スクリューポンプの振動の振幅の測定結果を示すグラフである。It is a graph which shows the measurement result of the amplitude of vibration of a suction type single axis eccentric screw pump.

符号の説明Explanation of symbols

1 現像装置
1a トナー導入孔
2 吸引型1軸偏芯スクリューポンプ
2a 駆動軸
2b ステータ
2c ハウジング
2d ロータ
2e 駆動モータ
2f 搬送経路
3 トナー収納容器
4 チューブ
5 吐出手段
6 勘合部(ノズル)
DESCRIPTION OF SYMBOLS 1 Developing device 1a Toner introduction hole 2 Suction type uniaxial eccentric screw pump 2a Drive shaft 2b Stator 2c Housing 2d Rotor 2e Drive motor 2f Conveyance path 3 Toner storage container 4 Tube 5 Discharge means 6 Fitting part (nozzle)

Claims (8)

画像形成装置において粉体収納容器から搬送経路を介して粉体を吸引して現像装置に搬送する吸引型1軸偏芯スクリューポンプであって、
雌ネジ状で螺旋状の穴部を備えたステータと、前記螺旋状の穴内に配置され駆動源に接続された駆動軸で回転駆動される雄ネジ状のロータと、
これらステータとロータを収容し、かつ前記搬送経路を介して搬送された粉体が吸引される吸引口を備えたハウジングと、
を備え
前記ロータの外径寸法で定まるロータ外径中心と、前記ステータの穴部内径寸法から定まるステータ内径中心との偏芯量が、前記駆動軸の軸芯と前記ロータ外径中心との偏芯量よりも大きく設定され
前記ロータの回転により前記ステータ及び前記ハウジングを振動させる、
ことを特徴とする吸引型1軸偏芯スクリューポンプ。
A suction-type single-axis eccentric screw pump that sucks powder from a powder container through a conveyance path and conveys it to a developing device in an image forming apparatus,
A stator having a helical hole in the female screw shape, and the spiral is disposed in the bore male screw shaped rotor which is driven to rotate the connected drive shaft to the drive source,
A housing that houses the stator and the rotor and includes a suction port through which the powder transported through the transport path is sucked;
With
Eccentricity of the rotor outside diameter central determined by the outer diameter of the rotor, eccentricity of the stator inner diameter center determined from hole inner diameter of the stator, and the axis of the front SL drive shaft the rotor outer diameter center is set larger than the amount,
The stator and the housing are vibrated by rotation of the rotor;
A suction type single-shaft eccentric screw pump characterized by that.
前記ロータと前記駆動軸とが1部品として構成されていることを特徴とした請求項1記
載の吸引型1軸偏芯スクリューポンプ。
The suction type single-shaft eccentric screw pump according to claim 1, wherein the rotor and the drive shaft are configured as one part.
前記ステータはハウジング内に配置され、前記搬送経路の少なくとも一部は前記ハウジ
ングと一体として形成されていることを特徴とする請求項1又は2記載の吸引型1軸偏芯
スクリューポンプ。
The suction type single-shaft eccentric screw pump according to claim 1, wherein the stator is disposed in a housing, and at least a part of the transport path is formed integrally with the housing.
前記吸と前記粉体収納容器と剛性的に接続されていることを特徴とする請求
項1乃至3のいずれか記載の吸引型1軸偏芯スクリューポンプ。
The Aspirate port and the powder container and the suction type 1 Jikuhenshin screw pump according to any one of claims 1 to 3, characterized in that it is rigidly connected.
前記駆動源を駆動制御する駆動制御装置を備え、駆動制御装置は駆動源によるロータの
1回の駆動回転角度を180°以上とすることを特徴とする請求項1乃至4のいずれか記
載の吸引型1軸偏芯スクリューポンプ。
The suction according to any one of claims 1 to 4, further comprising a drive control device that drives and controls the drive source, wherein the drive control device sets a single drive rotation angle of the rotor by the drive source to 180 ° or more. Type 1 axis eccentric screw pump.
前記現像装置とは柔的に結合されていることを特徴とする請求項1乃至5いずれか記載の吸引型1軸偏芯スクリューポンプ。 6. The suction type single-shaft eccentric screw pump according to claim 1, wherein the suction unit is flexibly coupled to the developing device . 請求項1乃至6のいずれか記載の吸引型1軸偏芯スクリューポンプを備えていることを特徴とする粉体トナー搬送装置。   A powder toner conveying device comprising the suction type uniaxial eccentric screw pump according to any one of claims 1 to 6. 請求項7記載の粉体トナー搬送装置を備えることを特徴とする画像形成装置。   An image forming apparatus comprising the powder toner conveying device according to claim 7.
JP2007288659A 2007-11-06 2007-11-06 Suction type uniaxial eccentric screw pump, powder toner conveying device, image forming device Active JP5036493B2 (en)

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