JPS6275563A - Forming device for toner layer thickness - Google Patents
Forming device for toner layer thicknessInfo
- Publication number
- JPS6275563A JPS6275563A JP21520285A JP21520285A JPS6275563A JP S6275563 A JPS6275563 A JP S6275563A JP 21520285 A JP21520285 A JP 21520285A JP 21520285 A JP21520285 A JP 21520285A JP S6275563 A JPS6275563 A JP S6275563A
- Authority
- JP
- Japan
- Prior art keywords
- elastic member
- toner
- pressing force
- layer thickness
- toner layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Dry Development In Electrophotography (AREA)
- Coating Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は磁性トナーを用いて現像を行う電子写真現像方
式に適用されるトナー層厚形成装置に係り、特にトナー
担持体上に接触するトナー層厚規制部材として薄板状の
弾性部材を用い、該弾性部材の折曲部をトナー担持体上
に圧接させて層厚規制を行う、トナー層厚形成装置に関
する。Detailed Description of the Invention "Field of Industrial Application" The present invention relates to a toner layer thickness forming device applied to an electrophotographic development method that performs development using magnetic toner, and particularly relates to a toner layer thickness forming device that is applied to an electrophotographic development method that performs development using magnetic toner. The present invention relates to a toner layer thickness forming device that uses a thin plate-like elastic member as a layer thickness regulating member and regulates the layer thickness by pressing a bent portion of the elastic member onto a toner carrier.
「従来の技術」
従来より、例えばトナー層を静電保持面に直接接触させ
ずに、静電像の電界と共に、現像位置に直流バイアス又
は交番バイアス電圧を印加し、該電界効果により、前記
トナーを静電保持面に選択的に飛行させる、いわゆるト
ナー層非接触形電子写真現像方式においては、トナー担
持体上に担持させた現像位置におけるトナー層厚を、静
電保持面との間の現像間隔以下に設定しなければならな
い為に、前記現像位置の上流側で行うトナー層厚規制に
は、薄膜化と共に所望の膜厚で而も凹凸のない平滑且つ
均質なトナー層が形成される事が要請される。"Prior Art" Conventionally, for example, a DC bias or an alternating bias voltage is applied to a development position together with the electric field of an electrostatic image without directly contacting the toner layer with an electrostatic holding surface, and the electric field effect causes the toner to In the so-called non-contact electrophotographic development method in which a toner layer is selectively flown onto an electrostatic holding surface, the thickness of the toner layer carried on a toner carrier at the development position is determined by the development distance between the toner holding surface and the electrostatic holding surface. Since the toner layer thickness must be set to a value equal to or smaller than the interval, the toner layer thickness regulation performed upstream of the development position requires not only thinning but also the formation of a smooth and homogeneous toner layer with the desired thickness and no unevenness. is requested.
かかる要請を満足する為本出願人は先に、トナー担持体
上に接触するトナー層厚規制部材としてトナー搬送方向
と直交する方向に折曲させた薄板状の弾性部材を用い、
該弾性部材の折曲部をトナー担持体上に圧接させて層厚
規制を行う事により、面接触による長所を生かしつつ実
質的に線接触による層厚規制を行うようにしたトナー層
厚形成装置を提案している。(特願昭80−15522
7号)
「発明が解決しようとする問題点」
かかる先願技術によれば、薄膜に且つ常に精度よく所望
の膜厚のトナー層厚を形成し得、前述した要請を満足す
ると共に、該層厚規制位置でのトナーの帯電を均一化し
、かぶりやにじみ、モして白筋等が発生する事がない層
厚規制手段を提供する事が出来るが、層厚規制部材とし
て薄板状の弾性部材を用いる為に、永年使用により前記
弾性部材の弾性力の低減、即ちヘタリが生じ、而も該へ
タリは線接触による圧接部位に均一に発生するものでは
なく、部分的に発生するものである為に、即、搬送方向
における膜厚の乱れとなって現れ、良好な画像形成を困
難にする。In order to satisfy this requirement, the present applicant first used a thin plate-like elastic member bent in a direction perpendicular to the toner transport direction as a toner layer thickness regulating member that contacts the toner carrier.
A toner layer thickness forming device that regulates the layer thickness by bringing the bent portion of the elastic member into pressure contact with the toner carrier, thereby effectively regulating the layer thickness through line contact while taking advantage of the advantages of surface contact. is proposed. (Patent application 1980-15522
No. 7) "Problems to be Solved by the Invention" According to the prior art, it is possible to form a thin toner layer with a desired thickness at all times with high precision, and the above-mentioned requirements are met, and the layer is Although it is possible to provide a layer thickness regulating means that uniformizes the toner charge at the thickness regulating position and does not cause fogging, bleeding, white streaks, etc., a thin plate-like elastic member is used as the layer thickness regulating member. Due to long-term use, the elastic force of the elastic member decreases, that is, it becomes sagging, and this sagging does not occur uniformly in the pressure-welded area due to line contact, but only partially. This immediately appears as a disturbance in the film thickness in the transport direction, making it difficult to form a good image.
又、トナー搬送方向と直交するトナー担持体の両側端側
におけるトナー飛散を防止する為に、前記両側端側位置
の、前記弾性部材の折曲部上流側とトナー担持体間にス
ポンジその他のシール部材を介在させる場合があるが、
このような構成を取ると、該シール部材を介在させた両
側端位置とシール部材に挟まれる中央位置では前記弾性
部材に印加される、反作用力(弾性部材の圧接力に抗す
る力)が異なる為に、前記両側端位置及び該側端位置に
近接する。該弾性部材の折曲部位に最初にへたりが生じ
、この結果、両側端側のトナー膜厚が厚くなり、やはり
良好な画像形成を困難にする。Further, in order to prevent toner from scattering at both ends of the toner carrier perpendicular to the toner transport direction, a seal such as a sponge is installed between the upstream side of the bent portion of the elastic member and the toner carrier at both ends. Although there are cases where parts are interposed,
With such a configuration, the reaction force (force resisting the pressure contact force of the elastic member) applied to the elastic member is different at both end positions with the seal member interposed and at the center position sandwiched between the seal members. Therefore, it is close to the both end positions and the side end positions. Sagging occurs first at the bent portion of the elastic member, and as a result, the toner film thickness at both end sides becomes thicker, which also makes it difficult to form a good image.
かかる欠点を解消する為、前記弾性部材を厚肉にし、該
弾性部材の弾性力を増強させる事が考えられるが、この
ように構成すると前記弾性部材の折曲部の曲げ角におけ
る曲率半径が大になり、この結果、トナー担持体との間
で実質的に線接触にて接触させる事が出来ず、面接触に
よる接触となる為に、該接触面にトナーが固着又は凝着
してトナー層厚の乱れが生じ、前記先願技術の効果を円
滑に達成し得ない。In order to eliminate this drawback, it is conceivable to increase the elastic force of the elastic member by increasing the thickness of the elastic member, but with this configuration, the radius of curvature at the bending angle of the bent portion of the elastic member is large. As a result, the toner carrying member cannot be brought into contact with the toner carrier substantially by line contact, but by surface contact, and the toner adheres or adheres to the contact surface, resulting in a toner layer. The thickness is disturbed, and the effect of the prior art cannot be smoothly achieved.
又前記弾性部材を厚肉にした場合は、弾性部材が薄肉の
場合に比してヤング率が大になる為に、僅かな腕曲量の
変化によっても弾性力、即ち圧接力が大きく変化し、取
付精度の増大と共に、所望の膜厚を得るのが極めて困難
になり、同様に先願技術の効果を円滑に達成し得ない。Furthermore, when the elastic member is made thick, the Young's modulus becomes larger than when the elastic member is thin, so even a slight change in the amount of arm bending causes a large change in the elastic force, that is, the pressure contact force. As the mounting precision increases, it becomes extremely difficult to obtain a desired film thickness, and similarly the effects of the prior art cannot be smoothly achieved.
本発明は、前記りb件部材の薄板化と折曲部の実質的な
線接触を維持し、前記先願技術における効果を円滑に達
成しつつも、該先願技術の問題点である、永年使用によ
る前記弾性部材にへたりが生ずるのを防止し、この結果
、安定して常に均−且つ平滑なトナー層を形成し得るト
ナー層厚形成装置を提供する事を目的とする。The present invention maintains the thinning of the member described above and the substantial line contact of the bent portions, and smoothly achieves the effects of the prior art, while also addressing the problems of the prior art. It is an object of the present invention to provide a toner layer thickness forming device that can prevent the elastic member from becoming sagging due to long-term use and, as a result, can consistently form a uniform and smooth toner layer.
又本発明の他の目的は、トナー担持体の両側端側にスポ
ンジその他のシール部材を介在させた場合であっても、
トナー搬送方向と直交する方向(以下軸方向という)に
おける折曲部とトナー担持体間の圧接力の均一化と安定
化を図り得るトナー層厚形成装置を提供する事にある。Another object of the present invention is that even when sponges or other sealing members are interposed on both ends of the toner carrier,
It is an object of the present invention to provide a toner layer thickness forming device capable of equalizing and stabilizing the pressure contact force between a bent portion and a toner carrier in a direction perpendicular to the toner transport direction (hereinafter referred to as the axial direction).
r問題点を解決する為の手段」
本発明は、かかる技術的課題を達成する為に、例えば第
1図に示す如く、トナー担持体l上に接触するトナー層
厚規制部材としてトナー搬送方向と直交する方向に折曲
させた薄板状の弾性部材2を用い、該弾性部材2の折曲
部2aをトナー担持体1上に圧接させて層厚規制を行う
トナー層厚形成装置において、前記弾性部材2背面側よ
りトナー担持体1に向けて押圧力を付勢する押圧力付勢
手段3を有し、該付勢手段3が少なく共弾性部材2両側
端側に位置し、且つ折曲部2aと離間した位置に配し、
該抑圧力付勢手段3と弾性部材2との協同作用により前
記折曲部2aに所定の押圧力を付勢し、その圧接力の均
一化を図った技術手段を提案する。In order to achieve this technical problem, the present invention, for example, as shown in FIG. In a toner layer thickness forming apparatus that uses a thin plate-shaped elastic member 2 bent in orthogonal directions and presses the bent portion 2a of the elastic member 2 onto the toner carrier 1 to regulate the layer thickness, the elastic member 2 The member 2 has a pressing force urging means 3 that applies a pressing force toward the toner carrier 1 from the back side, and the urging means 3 is small and located on both side ends of the co-elastic member 2, and has a bent portion. Placed in a position separated from 2a,
A technical means is proposed in which a predetermined pressing force is applied to the bent portion 2a by the cooperative action of the suppressing force urging means 3 and the elastic member 2, and the pressing force is made uniform.
尚木技術手段において、弾性部材2の材質、形状は先願
技術において説明した通りであるが、繰り返し第1図に
基づいて簡単に説明するに、該弾性部材2はアルミ板、
燐青銅、SUSその他の金属弾性板で形成され、その肉
厚を0.05〜0.5 ff1mに、又折曲部2aの
曲率半径Rを0.15〜0.5 mm、更に前記折曲部
2aの侵入角(θl)、曲げ角(02) 、逃げ角(0
3)を夫々下記のように設定する事により弾性部材2と
トナー担持体1との圧接部位Aが実質的に線接触に維持
する事が出来る。 01:]、O’〜90’ 、
θ2 :lO”〜1GO’ 、03:10°〜(160
−θl)’
面木発明は前記圧接部位Aが実質的に線接触の場合に好
ましい効果を発揮し得るが、必ずしもこれのみに限定さ
れるものではなく、該圧接部位Aか細い帯状の、面接触
に近い場合にも適用し得る。In the Naoki technical means, the material and shape of the elastic member 2 are as explained in the prior art, but to briefly explain again based on FIG. 1, the elastic member 2 is made of an aluminum plate,
It is formed of a metal elastic plate such as phosphor bronze, SUS, etc., and has a wall thickness of 0.05 to 0.5 ff1m, and a radius of curvature R of the bent portion 2a of 0.15 to 0.5 mm, and furthermore, Penetration angle (θl), bending angle (02), relief angle (0
By setting 3) as shown below, the pressure contact area A between the elastic member 2 and the toner carrier 1 can be maintained in substantially line contact. 01:], O'~90',
θ2: lO"~1GO', 03:10°~(160
-θl)' The invention can exhibit a preferable effect when the pressure contact area A is substantially a line contact, but it is not necessarily limited to this, and the pressure contact area A is a thin strip-like surface contact. It can also be applied to cases close to .
「作用」
かかる技術手段によれば、弾性部材2背面側よりトナー
担持体1に向けて押圧力を付勢する押圧力付勢手段3が
折曲部2aと離間した位置に配されている為に1弾性部
材2の薄板化による効果を低減する事なく、永年使用に
よっても変化する事なく、折曲部2aに常に安定した押
圧力を付勢する事が出来る。"Operation" According to this technical means, the pressing force biasing means 3 that biases the pressing force toward the toner carrier 1 from the back side of the elastic member 2 is arranged at a position apart from the bent portion 2a. (1) A stable pressing force can always be applied to the bent portion 2a without reducing the effect of making the elastic member 2 thinner, and without changing even after long-term use.
即ち、前記先願技術においては弾性部材2のみで前記圧
接部位Aにおける押圧力を得ている為に、該弾性部材2
を成る程度腕曲しなければ所望の押圧力が得られず、こ
の為に前述した弾性部材2のへたりが出易い。That is, in the prior art, since the pressing force at the pressure contact area A is obtained only by the elastic member 2, the elastic member 2
Unless the arm is bent to a certain extent, the desired pressing force cannot be obtained, and as a result, the elastic member 2 described above tends to become sagging.
しかしながら本発明によれば、該押圧力付勢手段3と弾
性部材2との協同作用、言い換えれば弾性部材2の腕曲
量(弾性力)を小さくし、押圧力付勢手段3の押圧力を
加えたものが、前記圧接部位Aにおける所定圧接力にな
ればよい為に、必然的に弾性部材2のへたりが出にくく
、且つ該へたりにより弾性部材2の弾性力が変動しても
それが直接的に圧接部位Aにおける押圧力の変動につな
がらず、この結果、常に安定した且つ平滑なトナー層厚
の形成が可能となる。However, according to the present invention, the cooperative action between the pressing force urging means 3 and the elastic member 2, in other words, the amount of arm bending (elastic force) of the elastic member 2 is reduced, and the pressing force of the pressing force urging means 3 is reduced. Since the applied force only needs to be a predetermined pressure contact force at the pressure contact portion A, it is inevitable that the elastic member 2 is less likely to sag, and even if the elastic force of the elastic member 2 changes due to the stagnation, it will not change. This does not directly lead to fluctuations in the pressing force at the pressing portion A, and as a result, it is possible to always form a stable and smooth toner layer thickness.
又、トナー相持体1の両側端側にスポンジその他のシー
ル部材を介在させた装置にあっては、その部分に近接す
る個所から弾性部材2のへたりが生じ易いが、本発明は
特に前記両側端側の、シール部材と対応する位置又はそ
の近接する位置に押圧力付勢手段3が配されている為に
、圧接部位Aにおける押圧力が永年使用によっても弱ま
る事がない。Furthermore, in a device in which a sponge or other sealing member is interposed on both side ends of the toner carrier 1, the elastic member 2 is likely to sag from a portion close to the sealing member. Since the pressing force biasing means 3 is disposed on the end side at a position corresponding to or in the vicinity of the sealing member, the pressing force at the press contact area A will not weaken even after long-term use.
従って該抑圧力の安定化と軸方向の押圧力の均一化によ
り、両側端側のトナー膜厚が軸方向に変化する事がなく
、常に安定且つ平滑なトナー層厚の形成が可能となる。Therefore, by stabilizing the suppressing force and making the pressing force uniform in the axial direction, the toner film thickness on both end sides does not change in the axial direction, making it possible to always form a stable and smooth toner layer thickness.
又、本発明によれば前記押圧力付勢手段3を弾性部材2
と別体に構成している為に、該弾性部材2と無関係に最
も好ましい形状及び材質を選択出来、例えば折曲部2a
に近接する弾性部材2の背面側に磁石体13を配しても
よく(後記第2〜3図参照)、又弾性部材2両側端側に
沿ってトナー搬送方向と平行に延在する一対のテープ体
23.23°を引張して配設してもよく(第4〜5図参
照)、更に前記弾性部材2より大なる肉厚を有する板状
弾性部材33.33’を用いて押圧させてもよく(第6
〜7図参照)、このような押圧力付勢手段3を用いる4
tにより、一層良好なトナー層厚の安定化が図れる。Further, according to the present invention, the pressing force urging means 3 is connected to the elastic member 2.
Since it is configured separately from the elastic member 2, the most preferable shape and material can be selected regardless of the elastic member 2. For example, the bent portion 2a
A magnet body 13 may be disposed on the back side of the elastic member 2 in the vicinity of the elastic member 2 (see FIGS. 2 and 3 below). The tape body 23.23° may be stretched and disposed (see FIGS. 4 and 5), and further pressed using a plate-shaped elastic member 33.33' having a wall thickness larger than that of the elastic member 2. It may be good (6th
(see Figures 7 to 7), 4 using such a pressing force urging means 3
t allows for better stabilization of the toner layer thickness.
更に、本発明によれば押圧力付勢手段3が折曲部2dと
離間した位置に配されている為に、該折曲部2aの弾性
効果及び弾性部材2の薄板化による前記先願技術の効果
を同等低減する事なく、却って弾性力の安定化が図れる
為に前記先願技術の効果を一層助長させる事が出来る。Furthermore, according to the present invention, since the pressing force biasing means 3 is disposed at a position apart from the bent portion 2d, the elastic effect of the bent portion 2a and the thinning of the elastic member 2 can be achieved in the prior art. Since the elastic force can be stabilized without reducing the effect to the same extent, the effect of the prior art can be further enhanced.
「実施例j
以下、図面を参照して本発明の好適な実施例を例示的に
詳しく説明する。ただしこの実施例に記載されている構
成部品の寸法、材質、形状、その相対配置などは特に特
定的な記載がない限りは、この発明の範囲をそれのみに
限定する趣旨ではなく、単なる説明例に過ぎない。Embodiment j Hereinafter, a preferred embodiment of the present invention will be explained in detail by way of example with reference to the drawings. However, the dimensions, materials, shapes, and relative arrangement of the components described in this embodiment are particularly Unless specifically stated, the scope of the present invention is not intended to be limited thereto, and is merely an illustrative example.
第1〜3図、第4〜5図及び第6〜7図はいずれも本発
明の第1、第2、第3実施例に係る現像装置を示し、先
ずその共通構成部分について説明する。1 to 3, 4 to 5, and 6 to 7 all show developing devices according to first, second, and third embodiments of the present invention, and first, common components thereof will be explained.
非磁性スリーブlは、アルミその他の非磁性金属材料で
形成され、矢印方向に所定の周速で回転可能に構成する
と共に、その外周面の表面粗さを0.5〜20島履に設
定する。尚、該外周面はへアーライン状に微細な凹凸溝
として形成してもよい。The non-magnetic sleeve l is made of aluminum or other non-magnetic metal material, is configured to be rotatable at a predetermined peripheral speed in the direction of the arrow, and has a surface roughness of 0.5 to 20 islands. . Note that the outer peripheral surface may be formed as fine uneven grooves in a hairline shape.
4は感光体ドラムで、該感光体ドラム4と非磁性スリー
ブlとの現像間隔を、現像位置におけるトナー層厚より
僅かに大に設定する。4 is a photoreceptor drum, and the development interval between the photoreceptor drum 4 and the nonmagnetic sleeve l is set to be slightly larger than the toner layer thickness at the development position.
5は前記スリーブ1内に内包された固定磁石集成体で、
第1実施例の場合は特に前記弾性部材12の圧接部位A
に近接する上流側に、N極の固定磁極5aを配置してい
る。6はスリーブ1に接続された直流パルス発生回路で
ある。5 is a fixed magnet assembly contained within the sleeve 1;
In the case of the first embodiment, the pressure contact portion A of the elastic member 12 is particularly
An N-pole fixed magnetic pole 5a is arranged on the upstream side close to. 6 is a DC pulse generation circuit connected to the sleeve 1.
トナー層厚規制部材たる薄板状弾性部材2は、トナー容
器7出ロ部しこ形成された支持部材8にその基端側を固
設し、その自由端側を所定の曲率で折曲し、該折曲部2
aをスリーブ1周面に所定の押圧力で且つ実質的に線接
触になる如く接触させる。The thin plate-like elastic member 2, which is a toner layer thickness regulating member, has its proximal end fixedly attached to a support member 8 formed with a groove at the outlet of the toner container 7, and its free end side bent at a predetermined curvature. The bent part 2
A is brought into contact with the circumferential surface of the sleeve 1 with a predetermined pressing force so as to substantially form a line contact.
スリーブ1両側端側の、前記弾性部材2の折曲部2a上
流側と支持部材8間には、スポンジ状のシール部材9が
圧潰させて挟着保持され、該シール部材8によりスリー
ブ1両側端側の弾性部材2の折曲部2a間を封止し、ト
ナーが前記両側端側より落下及び飛散するのを防止して
いる。A sponge-like seal member 9 is crushed and held between the upstream side of the bent portion 2a of the elastic member 2 and the support member 8 on both side ends of the sleeve 1, and the seal member 8 holds the sleeve 1 on both sides. The space between the bent portions 2a of the side elastic member 2 is sealed to prevent the toner from falling and scattering from the both ends.
かかる構成によれば公知の如く、トナー容器7内での摩
擦帯電により負極性に帯電された高抵抗磁性I・ナーを
その周面上に担持しながら現像位置まで搬送させた後、
前記発生回路6により形成されるスイッチングバイアス
の電界効果によりスリーブ1に担持しているトナーを静
電保持面に選択的に飛行させ、前述したトナー層非接触
形電子写真現像を行う事が出来る。According to such a configuration, as is well known, after the high-resistance magnetic I-toner negatively charged by frictional electrification in the toner container 7 is carried on its circumferential surface and transported to the development position,
By the electric field effect of the switching bias generated by the generating circuit 6, the toner carried on the sleeve 1 is selectively flown onto the electrostatic holding surface, and the above-described non-contact electrophotographic development of the toner layer can be performed.
次に前記各実施例の要部構成について説明す現像装置で
、前述したように前記非磁性スリーブ1内に内包される
固定磁石集成体5の、弾性部材2の折曲部2aの上流側
で且つ該折曲部2aに近接する位置に、N極の固定磁極
5aを配設する。Next, the main structure of each of the above-mentioned embodiments will be explained.As described above, the fixed magnet assembly 5 contained in the non-magnetic sleeve 1 is placed on the upstream side of the bent portion 2a of the elastic member 2. Further, a fixed magnetic pole 5a having an N pole is disposed at a position close to the bent portion 2a.
又該固定磁極5aと対応する弾性部材2の背面側の、折
曲部2aから僅かに離間した折曲部2a上流側位置に、
前記固定磁極5aと異極(S極)性の棒状磁石体13を
配設する。Further, on the back side of the elastic member 2 corresponding to the fixed magnetic pole 5a, at a position on the upstream side of the bent portion 2a slightly spaced from the bent portion 2a,
A bar-shaped magnet body 13 having a different polarity (S polarity) from the fixed magnetic pole 5a is provided.
この場合前記弾性部材2はアルミ板、燐青銅、等の非磁
性金属弾性板で形成する。前記固定磁極5aを折曲部2
aから離間して配置した理由は、前記折曲部2aにおけ
る弾性部材2の弾性力保持の為である。In this case, the elastic member 2 is formed of a non-magnetic metal elastic plate such as an aluminum plate or phosphor bronze. The fixed magnetic pole 5a is bent at the bent portion 2
The reason why they are arranged apart from a is to maintain the elastic force of the elastic member 2 at the bent portion 2a.
かかる実施例によれば棒状磁石体13と固定磁極5aと
の磁気的吸引力により前記弾性部材2に押圧力が付勢さ
れると共に、該抑圧力は磁気力である為に永年使用によ
っても経年変化が生じる事なく常に一定である。According to this embodiment, a pressing force is applied to the elastic member 2 due to the magnetic attractive force between the bar-shaped magnet body 13 and the fixed magnetic pole 5a, and since the suppressing force is a magnetic force, it will not deteriorate over time even after long-term use. It remains constant without any change.
第4図及び第5図は本発明の第2実施例に係る現像装置
で、弾性部材2両側端側に沿ってトナー搬送方向と平行
に一対のテープ体23.23′を延在配置し、該テープ
体23.23’の一端側を支持部材8の螺子部81に固
定した後、弾性部材2上方を通ってその自由端2b側を
圧接しながらその下流側に位置する非磁性スリーブ1周
面と接触させ、該テープ体23.23’の他端側を、ト
ナー容器7下端側に位置しスリーブ1軸と平行に配した
止め軸20に固定させ、該テープ体23.23’の引張
力により弾性部材2の自由端2b側を圧接しながら折曲
部2aに押圧力を付勢している。FIGS. 4 and 5 show a developing device according to a second embodiment of the present invention, in which a pair of tape members 23 and 23' are arranged extending parallel to the toner conveying direction along both side ends of the elastic member 2, After fixing one end side of the tape body 23, 23' to the threaded part 81 of the support member 8, the non-magnetic sleeve located on the downstream side passes over the elastic member 2 and presses against the free end 2b side of the elastic member 2. The tape body 23.23' is brought into contact with the surface, and the other end side of the tape body 23.23' is fixed to a stop shaft 20 located at the lower end side of the toner container 7 and arranged parallel to the axis of the sleeve 1, and the tension of the tape body 23.23' is A pressing force is applied to the bent portion 2a while pressing the free end 2b side of the elastic member 2 with the force.
尚、本実施例のように独立した止め軸20を用いなくて
もトナー容器7下端側に直接固定させてもよい。Note that, instead of using the independent stop shaft 20 as in this embodiment, it may be directly fixed to the lower end side of the toner container 7.
この場合前記テープ体23.23°は摩擦抵抗の少ない
樹脂テープを用いてもよく、又粘着テープ等を用い、該
粘着面にトナーが付着するよう構成してもよい。In this case, the tape body 23.23° may be made of a resin tape with low frictional resistance, or may be made of an adhesive tape or the like so that the toner adheres to the adhesive surface.
かかる実施例によれば前記テープ体23.23’の引張
力により前記弾性部材2に常に一定の押圧力が付勢され
ると共に、前記テープ体23.23’の抑圧位置がシー
ル部材9とほぼ対向する両側端側である為に、該シール
部材S付近が最も押圧力が強くなり、該抑圧力がシール
部材8の有する反作用力と均衡して、折曲部2aの圧接
部位に軸方向に沿って均一な圧接力が付勢される事とな
る。According to this embodiment, a constant pressing force is always applied to the elastic member 2 due to the tensile force of the tape body 23.23', and the suppressed position of the tape body 23.23' is approximately equal to the sealing member 9. Since they are on both opposite end sides, the pressing force is strongest near the seal member S, and the suppressing force is balanced with the reaction force of the seal member 8, and the pressing force is applied to the pressed part of the bent portion 2a in the axial direction. A uniform pressing force is applied along the line.
又前記テープ体23.23’はトナー規制位省下流側の
非磁性スリーブ1周面と接触させながら、該スリーブ1
の現像位置下流側まで延設させている為に、トナー規制
位置下流側における非磁性スリーブ1側端側へのトナー
飛散の防止を図る事が出来る。Further, the tape body 23, 23' is placed in contact with the peripheral surface of the non-magnetic sleeve 1 on the downstream side of the toner regulation level.
Since it extends to the downstream side of the development position, it is possible to prevent toner from scattering toward the end side of the non-magnetic sleeve 1 downstream of the toner regulation position.
第6図及び第7図は本発明の第3実施例に係る現像装置
で、前記弾性部材2より大なる肉厚を有する一対の板状
弾性部材33,33°を用い、該板状弾性部材33.3
3’の基端を螺子部81に固定すると共に、その自由端
側が、少なく共支持部材8下端位置より下方に位置する
よう延設し、折曲部2a両側端側の弾性部材2の背面側
より非磁性スリーブ1側に向け弾性力を付勢するよう4
!成している。6 and 7 show a developing device according to a third embodiment of the present invention, in which a pair of plate-shaped elastic members 33, 33° having a wall thickness larger than that of the elastic member 2 are used. 33.3
The base end of 3' is fixed to the screw part 81, and the free end side is extended so as to be located at least below the lower end position of the co-supporting member 8, and the back side of the elastic member 2 on both ends of the bent part 2a. 4 so as to bias the elastic force more toward the non-magnetic sleeve 1 side.
! has been completed.
かかる実施例によれば、板状弾性部材33.33’が弾
性部材2より大なる肉厚を有する為に、永年使用によっ
てもへたりが生じる恐れが少なく、この結果、常に一定
圧で前記弾性部材2に押圧力が付勢されると共に、前記
板状弾性部材33,33°の押圧位置がシール部材9と
対向する位置である為に、折曲部2aの圧接部位に軸方
向に沿って均一な圧接力が付勢される事となる。According to this embodiment, since the plate-like elastic members 33 and 33' have a wall thickness larger than that of the elastic member 2, there is little risk of fatigue occurring even after long-term use, and as a result, the elastic member 33, 33' is always maintained at a constant pressure. A pressing force is applied to the member 2, and since the pressing position of the plate-shaped elastic member 33, 33° is a position facing the sealing member 9, the pressing force is applied to the bent portion 2a along the axial direction. Uniform contact force will be applied.
「発明の効果」
以上記載した如く本発明によれば、弾性部材の薄板化と
折曲部がもたらす前記先願技術における効果を円滑に達
成しつつも、該先願技術の問題点である、永年使用によ
る前記弾性部材2にへたりが生ずるのを防止し、この結
果、安定して常に均−且つ平滑なトナー層を形成する事
が出来る。"Effects of the Invention" As described above, according to the present invention, the effects of the prior art, which are brought about by the thinning of the elastic member and the bent portion, can be smoothly achieved, while the problems of the prior art can be achieved. This prevents the elastic member 2 from becoming sagging due to long-term use, and as a result, a uniform and smooth toner layer can always be formed stably.
又本発明によれば、トナー担持体の両側端側にスポンジ
その他のシール部材を介在させた場合であっても、軸方
向における折曲部とトナー担持体間の圧接力の均一化を
図る事が出来る。Further, according to the present invention, even when a sponge or other seal member is interposed on both ends of the toner carrier, the pressure contact force between the bent portion and the toner carrier in the axial direction can be made uniform. I can do it.
従って本発明によれば、永年使用によっても常に安定し
た良好な画像を形成出来る、等の種々の著効を有す。Therefore, the present invention has various remarkable effects such as being able to consistently form stable and good images even after long-term use.
第1図〜3図、第4図〜5図及び第6図〜7図はいずれ
も本発明の第1、第2及び第3実施例を示し、第2図、
第4図及び第6図は各実施例の概略断面図、第3図、第
5図及び第7図はその要部斜視図である。
第1図は前記第2図の要部拡大図で本発明の原理説明図
を兼用している。
第1図
第2図
第3図
第4図
第6図
第7図
手続補正書
昭和60年11月よr日1-3, FIG. 4-5, and FIG. 6-7 all show the first, second, and third embodiments of the present invention, and FIG.
4 and 6 are schematic sectional views of each embodiment, and FIGS. 3, 5, and 7 are perspective views of essential parts thereof. FIG. 1 is an enlarged view of the main part of FIG. 2, and also serves as a diagram for explaining the principle of the present invention. Figure 1 Figure 2 Figure 3 Figure 4 Figure 6 Figure 7 Procedure amendment November 1985 to r date
Claims (1)
てトナー搬送方向と直交する方向に折曲させた薄板状の
弾性部材を用い、該弾性部材の折曲部をトナー担持体上
に圧接させて層厚規制を行うトナー層厚形成装置におい
て、前記弾性部材背面側よりトナー担持体に向けて押圧
力を付勢する押圧力付勢手段を有し、該付勢手段が少な
く共弾性部材両側端側に位置し、且つ折曲部と離間した
位置に配されている事を特徴とするトナー層厚形成装置 2)前記押圧力付勢手段が、折曲部に近接する弾性部材
の背面側に配した磁石体である特許請求の範囲第1項記
載のトナー層厚形成装置 3)前記押圧力付勢手段を、前記弾性部材両側端側に沿
ってトナー搬送方向と平行に延在する一対のテープ体で
形成し、該テープ体の一端側を弾性部材上方で固定した
後、該弾性部材の自由端側を押圧しながらその下流側に
位置するトナー担持体周面と接触させ、該テープ体の他
端側を前記担持体の現像位置下流側で固定させた事を特
徴とする特許請求の範囲第1項記載のトナー層厚形成装
置 4)前記押圧力付勢手段が、折曲部上流側の弾性部材の
背面位置よりトナー担持体側に向け弾性力を付勢する、
前記弾性部材より大なる肉厚を有する板状弾性部材であ
る特許請求の範囲第1項記載のトナー層厚形成装置[Claims] 1) A thin plate-like elastic member bent in a direction perpendicular to the toner transport direction is used as a toner layer thickness regulating member that contacts the toner carrier, and the bent portion of the elastic member A toner layer thickness forming device that regulates layer thickness by being brought into pressure contact with a carrier, comprising a pressing force biasing means for biasing a pressing force from the back side of the elastic member toward the toner carrier, the biasing unit 2) The toner layer thickness forming device is characterized in that the co-elastic member is located at both ends of the co-elastic member and is spaced apart from the bent portion.2) The pressing force biasing means is located close to the bent portion. 3) The toner layer thickness forming device according to claim 1, wherein the toner layer thickness forming device is a magnet disposed on the back side of the elastic member. Formed by a pair of tape bodies extending in parallel, one end of the tape body is fixed above an elastic member, and then the peripheral surface of the toner carrier positioned downstream of the free end of the elastic member is pressed. 4) The toner layer thickness forming device according to claim 1, wherein the other end side of the tape body is fixed on the downstream side of the development position of the carrier 4) The pressing force biasing device means biases an elastic force toward the toner carrier from a rear position of the elastic member upstream of the bending portion;
The toner layer thickness forming device according to claim 1, wherein the toner layer thickness forming device is a plate-like elastic member having a wall thickness greater than that of the elastic member.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60215202A JPH0652449B2 (en) | 1985-09-30 | 1985-09-30 | Toner layer thickness forming device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP60215202A JPH0652449B2 (en) | 1985-09-30 | 1985-09-30 | Toner layer thickness forming device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6275563A true JPS6275563A (en) | 1987-04-07 |
JPH0652449B2 JPH0652449B2 (en) | 1994-07-06 |
Family
ID=16668380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP60215202A Expired - Fee Related JPH0652449B2 (en) | 1985-09-30 | 1985-09-30 | Toner layer thickness forming device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0652449B2 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS642260U (en) * | 1987-06-24 | 1989-01-09 | ||
JPS6419965U (en) * | 1987-07-24 | 1989-01-31 | ||
JPS6444473A (en) * | 1987-08-12 | 1989-02-16 | Fuji Xerox Co Ltd | One-component developing device |
JPH02108082A (en) * | 1988-10-18 | 1990-04-19 | Matsushita Electric Ind Co Ltd | Developing device for one-component toner |
US5054419A (en) * | 1988-05-09 | 1991-10-08 | Konica Corporation | Image forming apparatus |
US5325637A (en) * | 1991-10-31 | 1994-07-05 | Konica Corporation | Developing apparatus with an improved sleeve |
JPH07325482A (en) * | 1994-05-31 | 1995-12-12 | Nec Corp | Developing device |
US5819145A (en) * | 1995-07-31 | 1998-10-06 | Ricoh Company, Ltd. | Image forming device for forming a uniform toner layer on a developing roller |
JP2014157332A (en) * | 2013-02-18 | 2014-08-28 | Ricoh Co Ltd | Developing device and image forming apparatus |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5778064A (en) * | 1980-11-01 | 1982-05-15 | Ricoh Co Ltd | Developing apparatus |
JPS6053972A (en) * | 1983-09-05 | 1985-03-28 | Fuji Xerox Co Ltd | Developing device |
JPS60113273A (en) * | 1983-11-24 | 1985-06-19 | Ricoh Co Ltd | Controller of developer layer thickness |
-
1985
- 1985-09-30 JP JP60215202A patent/JPH0652449B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5778064A (en) * | 1980-11-01 | 1982-05-15 | Ricoh Co Ltd | Developing apparatus |
JPS6053972A (en) * | 1983-09-05 | 1985-03-28 | Fuji Xerox Co Ltd | Developing device |
JPS60113273A (en) * | 1983-11-24 | 1985-06-19 | Ricoh Co Ltd | Controller of developer layer thickness |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS642260U (en) * | 1987-06-24 | 1989-01-09 | ||
JPH0546031Y2 (en) * | 1987-06-24 | 1993-12-01 | ||
JPS6419965U (en) * | 1987-07-24 | 1989-01-31 | ||
JPS6444473A (en) * | 1987-08-12 | 1989-02-16 | Fuji Xerox Co Ltd | One-component developing device |
US5054419A (en) * | 1988-05-09 | 1991-10-08 | Konica Corporation | Image forming apparatus |
JPH02108082A (en) * | 1988-10-18 | 1990-04-19 | Matsushita Electric Ind Co Ltd | Developing device for one-component toner |
US5325637A (en) * | 1991-10-31 | 1994-07-05 | Konica Corporation | Developing apparatus with an improved sleeve |
JPH07325482A (en) * | 1994-05-31 | 1995-12-12 | Nec Corp | Developing device |
US5819145A (en) * | 1995-07-31 | 1998-10-06 | Ricoh Company, Ltd. | Image forming device for forming a uniform toner layer on a developing roller |
JP2014157332A (en) * | 2013-02-18 | 2014-08-28 | Ricoh Co Ltd | Developing device and image forming apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPH0652449B2 (en) | 1994-07-06 |
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