JPH0250184A - Developing device - Google Patents
Developing deviceInfo
- Publication number
- JPH0250184A JPH0250184A JP16707688A JP16707688A JPH0250184A JP H0250184 A JPH0250184 A JP H0250184A JP 16707688 A JP16707688 A JP 16707688A JP 16707688 A JP16707688 A JP 16707688A JP H0250184 A JPH0250184 A JP H0250184A
- Authority
- JP
- Japan
- Prior art keywords
- developer
- magnetic
- cylindrical rod
- carrier
- developing sleeve
- 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
- 238000003825 pressing Methods 0.000 claims abstract description 58
- 230000001105 regulatory effect Effects 0.000 claims description 42
- 239000000696 magnetic material Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 abstract description 13
- 230000005389 magnetism Effects 0.000 abstract description 5
- 230000003746 surface roughness Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 238000003756 stirring Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 239000002245 particle Substances 0.000 description 7
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- 229920005989 resin Polymers 0.000 description 6
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- 238000002474 experimental method Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 229910000640 Fe alloy Inorganic materials 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 230000004907 flux Effects 0.000 description 4
- 239000006247 magnetic powder Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 239000013013 elastic material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- MTZWHHIREPJPTG-UHFFFAOYSA-N phorone Chemical compound CC(C)=CC(=O)C=C(C)C MTZWHHIREPJPTG-UHFFFAOYSA-N 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- RBTKNAXYKSUFRK-UHFFFAOYSA-N heliogen blue Chemical compound [Cu].[N-]1C2=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=NC([N-]1)=C(C=CC=C3)C3=C1N=C([N-]1)C3=CC=CC=C3C1=N2 RBTKNAXYKSUFRK-UHFFFAOYSA-N 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- HFFXLYHRNRKAPM-UHFFFAOYSA-N 2,4,5-trichloro-n-(5-methyl-1,2-oxazol-3-yl)benzenesulfonamide Chemical compound O1C(C)=CC(NS(=O)(=O)C=2C(=CC(Cl)=C(Cl)C=2)Cl)=N1 HFFXLYHRNRKAPM-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229920006311 Urethane elastomer Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000004840 adhesive resin Substances 0.000 description 1
- 229920006223 adhesive resin Polymers 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical class C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229940090961 chromium dioxide Drugs 0.000 description 1
- IAQWMWUKBQPOIY-UHFFFAOYSA-N chromium(4+);oxygen(2-) Chemical compound [O-2].[O-2].[Cr+4] IAQWMWUKBQPOIY-UHFFFAOYSA-N 0.000 description 1
- AYTAKQFHWFYBMA-UHFFFAOYSA-N chromium(IV) oxide Inorganic materials O=[Cr]=O AYTAKQFHWFYBMA-UHFFFAOYSA-N 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 239000008119 colloidal silica Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005685 electric field effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 150000004665 fatty acids Chemical class 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 235000010187 litholrubine BK Nutrition 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- NQNBVCBUOCNRFZ-UHFFFAOYSA-N nickel ferrite Chemical compound [Ni]=O.O=[Fe]O[Fe]=O NQNBVCBUOCNRFZ-UHFFFAOYSA-N 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- -1 polyethylene, ethylene-vinyl acetate Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920003225 polyurethane elastomer Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 1
- 229940043267 rhodamine b Drugs 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical class [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229920001909 styrene-acrylic polymer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、像形成体特に電子写真式画像形成装置に供さ
れる像形成体上の潜像の現像に適用される現像装置に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a developing device applied to developing a latent image on an image forming body, particularly an image forming body used in an electrophotographic image forming apparatus. be.
■成分又は２成分現像剤を用いての電子写真式画像形成
装置においては、良好な画像を得るために、現像剤担持
体（現像スリーブともいう）上の現像剤の層厚を薄く、
しかも均一にすることが必要である。(2) In an electrophotographic image forming apparatus using a component or two-component developer, in order to obtain a good image, the layer thickness of the developer on the developer carrier (also referred to as a developing sleeve) is thinned;
Moreover, it is necessary to make it uniform.
従来、古くから用いられる固定規制板により層厚の規制
がなされていたが、現像剤担持体と固定規制板との機械
的取付精度等にも限界があって層厚として０．３ｍｍ程
度が下限となっている。しかもこの方法で１ま均一でム
ラのない薄層を得ることは困難であった。然して均一な
薄層を得る目的に添ったものとして固定規制板以外の現
像剤層厚規制装置が種々考案されている。例えば、
（ａ）特開昭５４−４３０３８号公報記載の現像剤層形
成装置は、■成分トナーを用いる場合に現像剤担持体に
、一方に自由端を有する板状の弾性体よりなる現像剤の
層厚規制部材を撓ませて押圧させるものであり、
（ｂ）特開昭５４−５１８４８号公報記載の現像剤層形
成装置は金属バネと軟弾性体とを重ね合せた板状弾性体
を用い、軟弾性体の板状腹部を現像剤担持体に押圧する
ことによりｌ成分現像剤の層厚を規制するものである。Conventionally, the layer thickness has been regulated by a fixed regulation plate that has been used for a long time, but there are limits to the mechanical attachment precision between the developer carrier and the fixed regulation plate, and the lower limit for the layer thickness is about 0.3 mm. It becomes. Furthermore, it was difficult to obtain a thin layer that was uniform down to 1 and without unevenness using this method. However, various developer layer thickness regulating devices other than fixed regulating plates have been devised for the purpose of obtaining a uniform thin layer. For example, (a) the developer layer forming device described in JP-A No. 54-43038 uses a developer layer formed by a plate-shaped elastic body having a free end on one side on a developer carrier when using component (1) toner. (b) The developer layer forming device described in JP-A-54-51848 uses a plate-like elastic body made by superimposing a metal spring and a soft elastic body. The layer thickness of the l-component developer is regulated by pressing the plate-shaped abdomen of the soft elastic body against the developer carrier.
（Ｃ）特開昭５９−１２６５６７号、５９−１２９８７
９号公報等に記載の現像剤層形成装置は、やはりｌ成分
系現像剤を用いる現像装置において、現像剤担持体と間
欠的或は連続的に回転する弾性ローラを押圧せしめ両者
の間のニップにより現像剤の層厚を規制するものである
。(C) JP-A-59-126567, 59-12987
The developer layer forming device described in Publication No. 9, etc. is a developing device that also uses an l-component developer, and presses a developer carrier and an elastic roller that rotates intermittently or continuously to form a nip between the two. This controls the layer thickness of the developer.
（ｄ）特公昭６０−１２６２７号公報記載の現像剤層形
成装置は、ｌ成分現像剤を用いる現像装置において、弾
性体より成る現像剤担持体に回転ローラを接触せしめて
現像剤の層厚を規制するものである。(d) The developer layer forming device described in Japanese Patent Publication No. 60-12627 is a developing device using an l-component developer, in which a rotating roller is brought into contact with a developer carrier made of an elastic material to control the layer thickness of the developer. It is something that is regulated.
（ｅ）これらを２成分現像剤に用いるべく改良されたも
のとして特開昭６２−１９１８６８号及び特開昭６２−
１９１８６９号公報等に、非接触現像に適した現像スリ
ーブ上に薄層の現像剤層を形成する技術手段が開示され
ている。(e) JP-A No. 62-191868 and JP-A No. 62-62 as improved versions of these for use in two-component developers.
Japanese Patent No. 191869 and the like disclose technical means for forming a thin developer layer on a developing sleeve suitable for non-contact development.
これは、支持部材に支持された弾性板の先端を、現像ス
リーブ上の現像剤の移動の上流方向に向け、かつその弾
性板を上記現像スリーブ上に押圧させ、これによって上
記現像スリーブ上に付着、搬送される磁性キャリアとト
ナーとを含む現像剤の層厚を規制することによって、現
像剤層厚を従来の規制手段に比べて高精度で薄層に容易
に設定可能としたものである。This directs the tip of the elastic plate supported by the support member toward the upstream direction of the movement of the developer on the developing sleeve, and presses the elastic plate onto the developing sleeve, thereby causing the developer to adhere to the developing sleeve. By regulating the layer thickness of the developer containing the magnetic carrier and toner to be transported, the developer layer thickness can be easily set to a thinner layer with higher precision than conventional regulating means.
（ｆ）又同じく２成分現像剤を使用するもので特開昭６
１−１８９５８２号、同６２−７５５６３号公報等に記
載の現像装置では、固体板状層厚規制部材を設けその背
面に磁性体を配置し、現像剤担持体内に設けた固定磁石
体の吸引力によって間接的に規制板の腹部或は折曲げエ
ツジ部等を押圧させてその層厚を規制しようとするもの
などが開示されている。(f) Also uses a two-component developer, published in JP-A-6
1-189582, No. 62-75563, etc., a solid plate-like layer thickness regulating member is provided, a magnetic material is arranged on the back surface thereof, and the attraction force of a fixed magnet provided in a developer carrier is A method has been disclosed in which the thickness of the layer is regulated by indirectly pressing the abdomen or bent edge of the regulating plate.
上記従来提案されている如き各現像剤層形成装置の欠点
としてはそれぞれ下記のようなことがある。（ａ）、（
ｂ）装置共に、弾性体からなる層厚規制部材を撓ませて
発生する押圧力を利用しているため、その押圧力は現像
剤担持体の回転速度、圧接位置及び現像剤層厚等の変動
により変化し易く、また振動し易く、しかもその振動を
抑制する手段が講じられていないため、画像形成装置内
で発生した振動に共振して振動するようになり、このた
め均一な厚さの現像剤層を得ることが困難になるという
問題点がある。又、特に（ｂ）装置において、軟弾性体
にて押圧するためその傾向が著しく現われるが、更に当
接部にツブ）の幾何学的形状が現像剤担持体の回転速度
、圧接位置及び現像剤層厚等の変動により摂動を受は易
く、当該ニップの面積が変化する。従って、現像剤層の
厚みにムラができ易くなると言う開運を生じる。この様
な不都合の他、ニップを形成する一方又は両方を軟弾性
体で構成した場合はさらにニップの現像剤による目詰ま
りと（軟）弾性体の摩耗による経時的変動が生じる不都
合がある。これらの不都合は特に磁性材料や流動化剤な
どの硬物質を含む現像剤の場合に起き易い。また（Ｃ）
の装置では（ａ）よりさらに安定した均一な薄い層を得
ることが出来るが回転体による層厚規制手段によるため
現像剤の凝集した粒子を解きほぐす或は凝集した一粒子
を排除する能力等においてその性能は劣り、ニップ部に
凝集した粒子の塊りが挟持され、回転体の回転に伴って
スルーしてしまうと言った現象を生じ、間欠回転によっ
ても必ずしも満足される性能が得られず、画像汚れや黒
点等を生じ画質低下を来たすものである。また圧力バラ
ンスを取るため回転機構、圧接機構等が複雑なものにな
っていｔ；。Each of the conventionally proposed developer layer forming apparatuses has the following drawbacks. (a), (
b) Since both devices utilize the pressing force generated by bending the layer thickness regulating member made of an elastic body, the pressing force is subject to fluctuations such as the rotational speed of the developer carrier, the pressure contact position, and the developer layer thickness. It is easy to change and vibrate, and since no means have been taken to suppress the vibration, the image forming apparatus vibrates in resonance with the vibrations generated within the image forming device, and as a result, it is difficult to develop a uniform thickness. There is a problem that it becomes difficult to obtain a layer of the agent. In addition, especially in the device (b), this tendency is noticeable because the pressure is applied using a soft elastic body, but the geometrical shape of the protrusion at the abutting part also depends on the rotational speed of the developer carrier, the pressure contact position, and the developer. It is easily subject to perturbations due to changes in layer thickness, etc., and the area of the nip changes. Therefore, the thickness of the developer layer tends to become uneven. In addition to these inconveniences, when one or both of the nip members are made of a soft elastic material, there are further disadvantages in that the nip is clogged with developer and changes over time occur due to wear of the (soft) elastic material. These disadvantages are particularly likely to occur in the case of a developer containing a hard substance such as a magnetic material or a fluidizing agent. Also (C)
With the device described in (a), it is possible to obtain a more stable and uniform thin layer than in (a), but because the layer thickness regulating means is based on a rotating body, it is not as good as the ability to loosen aggregated developer particles or eliminate a single aggregated particle. The performance is poor, and agglomerated particles are caught in the nip, causing phenomena such as particles passing through as the rotating body rotates, and even with intermittent rotation, satisfactory performance cannot always be obtained, resulting in poor image quality. This causes stains, black spots, etc., and deteriorates the image quality. Also, in order to balance the pressure, the rotation mechanism, pressure contact mechanism, etc. have become complicated.
また、（ａ）〜（ｄ）のいずれの装置も層厚規制部材の
押圧面積が比較的大きくニップ部に送り込まれる現像剤
量が時々刻々変動する通常の現像装置にあっては、この
ような変動を反映して、時々刻々変化する現像剤層厚を
与えてしまうと言う欠点がある。In addition, in any of the devices (a) to (d), the pressing area of the layer thickness regulating member is relatively large and the amount of developer fed into the nip section fluctuates from time to time in a normal developing device. There is a drawback that the thickness of the developer layer changes from moment to moment, reflecting the fluctuations.
（ｃ）、（ｄ）は非磁性−成分現像剤に好適な、現像剤
担持体が弾性を有し、これに現像剤層厚規制部材を押し
当て、現像剤の薄層を形成する技術であり、現像剤担持
体が永久変形したり、現像剤層厚規制部材の弾性率が、
長期の使用で変化しやすく、安定な層形成が出来得ない
。(c) and (d) are techniques suitable for non-magnetic component developers in which the developer carrier has elasticity and a developer layer thickness regulating member is pressed against it to form a thin layer of developer. Yes, the developer carrier may be permanently deformed or the elastic modulus of the developer layer thickness regulating member may be
It tends to change after long-term use and cannot form a stable layer.
二成分用に開発された（ｅ）においても長期の使用では
充分な特性を保持できない。Even in (e) developed for two components, sufficient properties cannot be maintained during long-term use.
さらに、（ａ）、（ｂ）、（ｅ）及び（ｆ）においては
剛性を有する現像剤担持体（金属スリーブ）に弾性現像
剤層厚規制板を押圧し薄層形成を行うものであって、長
期的使用時に弾性板の弾性率変化や、永久変形を生じや
すく、層厚規制部材としての耐久性が短いという欠点を
有していた。Furthermore, in (a), (b), (e) and (f), a thin layer is formed by pressing an elastic developer layer thickness regulating plate onto a rigid developer carrier (metal sleeve). However, during long-term use, the elastic plate tends to change its elastic modulus and undergo permanent deformation, and its durability as a layer thickness regulating member is short.
しかも弾性板の取付に際し、その位置がわずかに変化す
ると、先端あそび量や、押圧力が変化して安定な層厚規
制が出来にくい。このため、量産時には取付精度がきわ
めて厳しいという重大な欠点も持っている。Moreover, if the position of the elastic plate changes slightly when installing the elastic plate, the amount of play at the tip and the pressing force will change, making it difficult to regulate the layer thickness stably. For this reason, it also has a serious drawback in that mounting accuracy is extremely strict during mass production.
又特に（［）においては現像剤層厚規制部材の背面及び
現像剤担持体の内部に配置された磁石相互によるトナー
凝集の解きほぐし等の効果はやや働くものの、固体板状
規制部材を介しての吸引力を利用するため、両磁石間の
距離が大きくなる程急激にその吸引力が下がるなど、距
離変動による押圧変動をひろい易く、現像剤層への押圧
効果が安定して均一とならずトナー或は現像剤の凝集物
がスルーしてしまったり又逆に一定した層厚が得られず
、目ヅマリを生じ画質に白スジを引き起すなどの悪影響
を及ぼすと云う欠点を有する。In particular, in ([), although the effect of disentangling toner agglomeration by the magnets arranged on the back side of the developer layer thickness regulating member and inside the developer carrier is somewhat effective, Since the attraction force is used, the attraction force decreases rapidly as the distance between both magnets increases, and the pressure tends to fluctuate due to distance changes.The pressing effect on the developer layer is not stable and uniform, and the toner Alternatively, there are disadvantages in that aggregates of the developer may pass through, or conversely, a constant layer thickness cannot be obtained, resulting in smudges and negative effects such as white streaks on image quality.
本発明は、これらの点を解決して良好な画像を安定して
形成するべき、現像剤担持体上の現像剤の層厚を均一に
して安定に形成し、凝集した現像剤やトナーが現像領域
に移動することを防止し得るようにした現像装置を提供
することを目的とする。The present invention aims to solve these problems and stably form a good image by uniformly forming a layer of developer on a developer carrier, so that the agglomerated developer and toner can be formed stably. An object of the present invention is to provide a developing device that can prevent the developing device from moving into the area.
上記目的は固定された磁石体と、内部に該磁石体を有し
、表面上に現像剤を担持する剛性を有する現像剤担持体
と、該磁石体に対向して該担持体に押圧され、該担持体
に担持された現像剤の量を規制する棒状の現像剤量規制
体とを有し、該規制体の該担持体との押圧部が剛性かつ
磁性を有する材料であると共に、曲率半径が０．５〜１
５ｍｍであることを特徴とする現像装置によって達成さ
れる。The above object includes a fixed magnet body, a developer carrier having the magnet body inside and having a rigidity to support a developer on the surface, and a developer carrier that is pressed against the carrier body facing the magnet body; It has a rod-shaped developer amount regulating body that regulates the amount of developer supported on the carrier, and the pressing part of the regulating body with the carrier is made of a rigid and magnetic material, and has a radius of curvature. is 0.5-1
This is achieved by a developing device characterized by a thickness of 5 mm.
〔問題点を解決するための手段の説明〕本発明は剛性を
有する現像剤担持体に同様に剛性を有する棒状の磁性部
材を現像剤量規制体として押圧することにより安定した
薄層を形成することができた。[Description of means for solving the problem] The present invention forms a stable thin layer by pressing a similarly rigid rod-shaped magnetic member as a developer amount regulator onto a rigid developer carrier. I was able to do that.
本発明において、剛性を有するとは、大きな剛性率を有
することをいい、すなわち剛性率１０’ｋｇ／ｃｍ”以
上のものをいい、具体的には（０，８〜１．６）Ｘ ｌ
Ｏ’ｋｇ／ｃｍ”程度の剛性率を有する鉄、及びその合
金類を始めとする各種磁性金属類、及び磁性粉を含有し
た（１．０〜１０） Ｘ ｌｏ’ｋｇ／ａｍ”程度の剛
性率を有する硬質樹脂についても本発明の現像剤量規制
体として用いられる。またクロム等のメツキを施した鉄
及び鉄合金も用いられる。In the present invention, having rigidity refers to having a large rigidity, that is, having a rigidity of 10'kg/cm" or more, specifically (0.8 to 1.6)
Contains various magnetic metals including iron having a rigidity of about 0'kg/cm" and its alloys, and magnetic powder, and has a rigidity of about (1.0 to 10) x lo'kg/am" A hard resin having a certain ratio can also be used as a developer amount regulator in the present invention. Iron and iron alloys plated with chromium or the like are also used.
又、磁性を有するとは、磁石に引きつけられる性質があ
ることをいう。Also, having magnetism means having the property of being attracted to a magnet.
本発明者らは、下記の如き実験を行った。The present inventors conducted the following experiment.
第１図のような実験装置を用いて、磁性及び非磁性の円
柱棒５０による層形成を行なった。即ち、複数の磁極を
有したマグネットローラ４を固定し、その外側を現像ス
リーブ３を矢示方向に回転させた。この現像スリーブ３
にバネバカリを用いて円柱棒５０を押圧した。円柱棒５
０の押圧位置はマグネットローラ４の磁極に対向する位
置とした。パラメータを円柱棒５０の押圧力及び円柱棒
の径としたところ搬送量について第２図のようなグラフ
が得られた。ここで押圧力とは非磁性円柱棒の場合はバ
ネバカリの荷重Ｆと円柱棒の自重を加算したものであり
、磁、性円柱棒の場合は更に磁力による吸引力を加算し
たものである。図において実線で示したカーブは磁性円
柱棒、鎖線で示したカーブは非磁性円柱棒の場合を示し
ている。図から明らかなように現像剤の搬送量は円柱棒
５０とスリーブ３とが形成するくさび形の部分にはいり
込む現像剤が円柱棒におよぼす力と、バネ又はバネと磁
力等により押圧された円柱棒のスリーブ方向への力との
バランスに、より決定されることを示す。また磁性円柱
棒の場合は非磁性円柱棒と比べ押圧力の変動に対して現
像剤の搬送量が安定していることを示す。円柱棒５０の
材質として、Ｓ ＯＳ ３１０等の非磁性ＳＵＳやＡＱ
、ポリカーボネートを用い、磁性円柱棒５０としては、
Ｓ Ｕ Ｓ ４１６やＳ Ｕ Ｓ ４３０等の磁性ＳＵ
Ｓや鉄合金、磁性粉を含有した硬質樹脂を用い之等によ
って得られた結果を示している。Layers were formed using magnetic and non-magnetic cylindrical rods 50 using an experimental apparatus as shown in FIG. That is, a magnet roller 4 having a plurality of magnetic poles was fixed, and the developing sleeve 3 was rotated in the direction of the arrow on the outside thereof. This developing sleeve 3
The cylindrical rod 50 was pressed using a spring clamp. Cylindrical rod 5
The pressing position 0 was a position facing the magnetic pole of the magnet roller 4. When the parameters were the pressing force of the cylindrical rod 50 and the diameter of the cylindrical rod, a graph as shown in FIG. 2 was obtained regarding the conveyance amount. In the case of a non-magnetic cylindrical rod, the pressing force is the sum of the spring clamp load F and the cylindrical rod's own weight, and in the case of a magnetic cylindrical rod, it is the sum of the attractive force due to the magnetic force. In the figure, the curve shown by a solid line shows the case of a magnetic cylindrical rod, and the curve shown by a chain line shows the case of a non-magnetic cylindrical rod. As is clear from the figure, the amount of developer conveyed is determined by the force exerted on the cylindrical rod by the developer that enters the wedge-shaped portion formed by the cylindrical rod 50 and the sleeve 3, and the force exerted on the cylindrical rod by the spring or by the spring and magnetic force. This shows that it is determined by the balance between the force of the rod and the force toward the sleeve. Furthermore, in the case of a magnetic cylindrical rod, compared to a non-magnetic cylindrical rod, the amount of developer conveyed is stable against fluctuations in pressing force. The material of the cylindrical rod 50 may be non-magnetic SUS such as SOS 310 or AQ.
, polycarbonate is used as the magnetic cylindrical rod 50,
Magnetic SU such as SUS 416 and SUS 430
The results obtained using hard resin containing S, iron alloy, and magnetic powder are shown.
この装置において、円柱棒を曲率半径０．５ｍｍ＝ １
５ｍｍの好ましくは１ ｍｍ＝ １０ｍｍの剛性かつ磁
性を有する円柱棒とし、（１” １５）ｇｆ／ｍｍの押
圧力がかかるように設定したところ、装置の作動時に押
圧力の変動にかかわらず、安定した所望の搬送量が得ら
れた。押圧力が小さすぎると、現像剤量の規制力が減少
し安定した規制ができない。また現像器の振動など外的
影響を受は易く好ましくない。現像剤の凝集塊もスルー
させてしまい均一な現像剤層形成ができない。In this device, a cylindrical rod has a radius of curvature of 0.5 mm = 1
A cylindrical rod with rigidity and magnetism of 5 mm, preferably 1 mm = 10 mm, was set to apply a pressing force of (1" 15) gf/mm, and it was stable regardless of fluctuations in the pressing force during operation of the device. The desired conveyance amount was obtained. If the pressing force is too small, the regulating force for the amount of developer decreases and stable regulation cannot be achieved. Also, it is undesirable because it is easily influenced by external influences such as vibration of the developer. This also allows the agglomerates to pass through, making it impossible to form a uniform developer layer.
押圧力が高すぎると、現像剤への負荷が大きくなり規制
体の規制部近傍に現像剤成分の顕著な付着が見られるよ
うになり、長期間の使用に耐えられないばかりか、紙粉
、ゴム、現像剤の小さな塊までも規制部に詰まってしま
い白スジが発生し易くなる。If the pressing force is too high, the load on the developer will increase, and developer components will become noticeable near the regulating part of the regulating body. Not only will it not be possible to withstand long-term use, but paper dust, etc. Even small lumps of rubber or developer can get stuck in the regulating section, making white streaks more likely to occur.
押圧力の選定は上記の種々の観点から（１−１５）ｇｆ
／ｍｍが妥当であり特に（２−１０） ｇｆ／ｍｅが好
ましい。また第１表に記載したような磁性球形キャリア
を用いた２成分現像剤の場合には、押圧力として前記範
囲が最適である。その結果ムラのない、濃度の安定した
画像が得られた。The pressing force is selected from the above various viewpoints (1-15)gf
/mm is appropriate, and (2-10) gf/me is particularly preferred. Further, in the case of a two-component developer using a magnetic spherical carrier as shown in Table 1, the above range is optimal for the pressing force. As a result, an image with stable density and no unevenness was obtained.
また円柱棒をスリーブ方向に押圧する手段としては、使
用状態の前後を含めた使用範囲において撓み量に対する
荷重（反発力）の変動がすくない特性をもつ非線形弾性
部材を用いることが好適である・。かかる特性をもった
非線形弾性部材の特性カーブの一例を図示したのが第１
５図である。図示したのは僅かに性能を異にした４種の
ＦＯＲＯＮ （ｌＮｏＡＣ社商品名）についての特性カ
ーブで、横軸に撓み量、縦軸に荷重をとるとき使用範囲
Ｕにおいてはゆるやかな傾斜の安定領域であることを示
している。In addition, as a means for pressing the cylindrical rod in the direction of the sleeve, it is preferable to use a nonlinear elastic member that has a characteristic that the load (repulsion force) does not change much with respect to the amount of deflection in the range of use including before and after the use state. The first diagram illustrates an example of the characteristic curve of a nonlinear elastic member having such characteristics.
Figure 5. The diagram shows characteristic curves for four types of FORON (product name of INoAC) with slightly different performance.The horizontal axis shows the amount of deflection, and the vertical axis shows the load.In the usage range U, the slope is stable. This indicates that it is a region.
円柱棒の押圧材として、この使用範囲で押圧する非線形
弾性部材を使用することにより、ケーシングやホルダの
部品精度の誤差や現像装置の組付は状態によるバラツキ
によっても、そのバラツキを吸収して円柱棒のスリーブ
への押圧力の変動はすくなく、現像剤の層厚は均一に保
持される。By using a non-linear elastic member that presses within this range of use as the pressing material for the cylindrical rod, even if there are errors in the precision of the parts of the casing or holder or variations in the assembly of the developing device depending on the condition, the fluctuations can be absorbed and the cylindrical rod can be pressed. There is little variation in the pressing force of the rod against the sleeve, and the thickness of the developer layer is kept uniform.
即ち、従来の現像剤量規制体を有する現像装置に比べ非
常に安定した搬送量と均一な薄層が形成され得ることが
確認された。That is, it was confirmed that a very stable conveyance amount and a uniform thin layer could be formed compared to the conventional developing device having a developer amount regulator.
なお本発明の効果を失わない範囲で円柱棒等の棒状の現
像剤量規制部材に皮膜を設けてもよく、ポリウレタンゴ
ムやシリコンゴムの皮膜を設けることができる。Note that a coating may be provided on a rod-shaped developer amount regulating member such as a cylindrical rod within a range that does not impair the effects of the present invention, and a coating of polyurethane rubber or silicone rubber may be provided.
以上の結果をふまえて本発明を適用した現像装置の実施
例をまず第３図を用いて説明する。Based on the above results, an embodiment of a developing device to which the present invention is applied will first be described with reference to FIG.
実施例１
第３図は現像装置の要部断面を示すものであって、ｌは
像担持体、２はハウジング、３は現像スリーブ、４はマ
グネットローラ、５は現像剤の量を規制する剛性かつ磁
性を有する棒状体（円柱棒）、１５は円柱棒５を保持す
るホルダー ６は円柱棒５と現像スリーブ３との押圧か
ら、現像剤を搬送可能にするためのバネ材であり、円柱
棒５は現像スリーブ３に対し現像剤が介在しない状態で
一定荷重で押圧される。７および８は第１および第２撹
拌部材、９は供給ローラ、ｌＯはスクレーパ、１１ハ撹
拌仕切板である。Embodiment 1 FIG. 3 shows a cross section of main parts of a developing device, where l is an image carrier, 2 is a housing, 3 is a developing sleeve, 4 is a magnet roller, and 5 is a rigidity that regulates the amount of developer. and a magnetic rod-shaped body (cylindrical rod); 15 is a holder for holding the cylindrical rod 5; 6 is a spring member that enables the developer to be conveyed by the pressure between the cylindrical rod 5 and the developing sleeve 3; 5 is pressed against the developing sleeve 3 with a constant load without the presence of developer. 7 and 8 are first and second stirring members, 9 is a supply roller, IO is a scraper, and 11 is a stirring partition plate.
装置内に補給されたトナーは矢示方向に回転する第１撹
拌部材７と、これと反対方向で互に重複するように回転
する第２撹拌部材８とによりキャリアと充分撹拌混合さ
れた１現体刑りとして供給ローラ９を介して現像スリー
ブ３に送られる。The toner replenished into the device is thoroughly stirred and mixed with the carrier by the first stirring member 7 rotating in the direction of the arrow and the second stirring member 8 rotating in the opposite direction so as to overlap with each other. It is sent to the developing sleeve 3 via the supply roller 9 as a sample.
前記第１撹拌部材７と前記第２撹拌部材８は互に相反す
る矢示方向に回転する左巻きの螺旋角をもったスクリュ
ー状の部材であって第２撹拌部材８の推力によって奥側
に搬送されたトナーとキャリアは、図面の奥側方向に上
縁が低く傾斜する前記撹拌仕切板１１を順次乗り越えて
第１撹拌部材７側に移りその推力によって図面の手前側
に搬送され、その間におけるトナーとキャリアとの混合
作用によって摩擦帯電がなされた均質な現像剤りとされ
、スポンジ状で矢示方向に回転する。供給ローラ９によ
って現像スリーブ３周面上に層状に付着する。The first stirring member 7 and the second stirring member 8 are screw-shaped members with a left-handed helical angle that rotate in mutually opposite arrow directions, and are conveyed to the back side by the thrust of the second stirring member 8. The toner and carrier are transported to the front side of the drawing by the thrust of the first stirring member 7, passing over the stirring partition plate 11 whose upper edge is sloped low toward the back of the drawing. The mixture of developer and carrier forms a homogeneous developer that is triboelectrically charged, and rotates in the direction of the arrow in a sponge-like manner. The supply roller 9 deposits the powder onto the circumferential surface of the developing sleeve 3 in a layered manner.
なお第３図で示した例で用いた現像剤は下表のようなも
のである。The developer used in the example shown in FIG. 3 is as shown in the table below.
第１表
この装置において、円柱棒５を６１ｍｍの剛性かつ磁性
を有したＳＵＳとし、円柱棒５をマグネットローラ４の
磁極に対向する位置に（２〜６）ｇｆ／ｍｍの荷重がか
かるようにしたところ、均一でムラがなくほぼ（７〜９
） ｍｇ／ｃｍ’の搬送量が得られた。その結果ムラ
のない濃度の安定した画像が得られた。その際に現像ス
リーブ３表面の押圧位置での磁束密度は６００ガウスで
あった。磁性円柱棒５に代えて非磁性の６Ｓｍｍの剛性
を有する円柱棒を用いた場合と現像剤の搬送量の比較を
行ったのが第４図である。Table 1 In this device, the cylindrical rod 5 is made of 61 mm rigid and magnetic SUS, and a load of (2 to 6) gf/mm is applied to the cylindrical rod 5 at a position facing the magnetic pole of the magnet roller 4. When I tested it, it was uniform and even, almost (7 to 9)
) mg/cm' was obtained. As a result, an image with stable density and no unevenness was obtained. At that time, the magnetic flux density at the pressing position on the surface of the developing sleeve 3 was 600 Gauss. FIG. 4 shows a comparison of the amount of developer conveyed when a non-magnetic cylindrical rod having a rigidity of 6 S mm is used in place of the magnetic cylindrical rod 5.
また剛性かつ磁性を有する円柱棒５を用いた際の搬送量
については第５図に示すように半径を変化させたときの
押圧力と搬送量の関係を得ることができたが、之より適
当な搬送量を選ぶことが出来る。特に、曲率半径が０．
５〜１５ｍｍの場合に、現像剤りが円柱棒５におよぼす
力と円柱棒５のスリーブ３方向への力とのバランスがよ
くとれた安定した搬送量が得られた。さらに好ましくは
、曲率半径が１−１０ｍｍに場合に、押圧力の変動にか
かわらず、搬送量の変動が非常に少なく、均一で薄い現
像剤層厚を得ることができた。Regarding the amount of conveyance when using the rigid and magnetic cylindrical rod 5, we were able to obtain the relationship between the pressing force and the amount of conveyance when the radius was changed as shown in Fig. You can choose the transport amount. In particular, the radius of curvature is 0.
In the case of 5 to 15 mm, a stable conveyance amount was obtained in which the force exerted by the developer on the cylindrical rod 5 and the force of the cylindrical rod 5 in the direction of the sleeve 3 were well balanced. More preferably, when the radius of curvature is 1 to 10 mm, there is very little variation in the amount of conveyance regardless of variation in pressing force, and a uniform and thin developer layer thickness can be obtained.
なお剛性を有する現像スリーブ３の材質に非磁性体のス
テンレスを用いたが、アルミ材の金属や硬い樹脂、ガラ
ス、セラミックス等の剛性を有する材質を用いても同等
の効果が得られた。現像スリーブ３の表面アラサは３Ｓ
のものを用いた。表面アラサを（０，１〜２０）Ｓのも
のを用いても同様の効果が得られた。Although non-magnetic stainless steel was used as the material for the rigid developing sleeve 3, the same effect could be obtained by using a rigid material such as aluminum metal, hard resin, glass, or ceramics. The surface roughness of the developing sleeve 3 is 3S.
I used the one from A similar effect was obtained by using a material with a surface roughness of (0,1 to 20)S.
以上の説明したところより、前記現像スリーブ３表面に
は１００／７ ｒａ〜４５０／Ｊ ｍ好ましくは１５０
ｕｍ〜４００μｍの範囲の均一で安定した薄い現像剤層
を長期にわたって形成するようになる。From the above explanation, the surface of the developing sleeve 3 is 100/7 ra to 450/J m, preferably 150/J m.
A uniform, stable, and thin developer layer in the range of um to 400 μm is formed over a long period of time.
本実施例では固定したマグネットローラ４とその外側を
矢示方向（時計方向）に回転する現像スリーブ３周面上
に付着した薄層をなしたこの現像剤層は現像領域１２に
おいて矢示方向に回転する像担持体ｌ上の潜像を間隔を
へだてて非接触で現像しトナー像を形成するように構成
した。In this embodiment, this thin developer layer adheres to the peripheral surface of the fixed magnet roller 4 and the developing sleeve 3 rotating in the direction of the arrow (clockwise) on the outside thereof. The latent image on the rotating image carrier 1 is developed in a non-contact manner at intervals to form a toner image.
第６図は、第３図の例で形成された現像剤層が現像部近
傍で、穂立ちしている状況を示している。FIG. 6 shows a situation in which the developer layer formed in the example of FIG. 3 stands up in the vicinity of the developing section.
現像剤担持体３と像担持体ｌの最近接距離ｄ１現像剤の
穂立ち高さをＳとすると非接触現像方式ではｄ＞Ｓの条
件となる。When the closest distance d1 between the developer carrier 3 and the image carrier 1 and the spike height of the developer is S, the condition of d>S is satisfied in the non-contact development method.
この非接触現像時には図示しない電源から交流成分を含
む現像バイアスが前記現像スリーブ３に印加され、その
結実現像スリーブ３上に現像剤中のトナーのみが選択的
に前記潜像の面に移行して付着される。During this non-contact development, a developing bias containing an AC component is applied to the developing sleeve 3 from a power supply (not shown), and only the toner in the developer is selectively transferred to the surface of the latent image on the image forming sleeve 3. attached.
トナー成分を消費した現像剤はキャリア比率が高くなっ
て現像スリーブ３によって搬送されて前記スクレーパ１
０により剥離回収され、再びトナー比率の高い現像剤と
混合される。The developer whose toner components have been consumed has a higher carrier ratio and is conveyed by the developing sleeve 3 to the scraper 1.
The toner is peeled off and collected by 0, and mixed again with a developer having a high toner ratio.
本発明の現像装置の第３図に示した実施例の備える各構
成部材の仕様は次の通りである。The specifications of each component included in the embodiment of the developing device of the present invention shown in FIG. 3 are as follows.
前記現像スリーブ３は外径寸法２０ｍｍ−の薄肉円筒状
のステンレス材で外周面を３μｍの粗さにホニング処理
したものであり毎分２００〜３００回転、本実施例にお
いては毎分２５０回転で時計方向に回転されている。現
像スリーブ３の径は現像装置の小型化からも小径スリー
ブが求められるが、内蔵するマグネットローラの磁力の
制限から１５〜３０ｍｍ−に設定される。また現像スリ
ーブの回転数についても、種々実験を行ったが、回転数
が低いと現像剤の供給量も少なく、潜像を現像しｔ；と
きの画像濃度も低い。外径２０ｍｒａの現像スリーブに
ついてみると、回転数が毎分Ｏ〜２００回転の間は最高
画像濃度は直線的に増加し、毎分２００回転以上につい
ては飽和状態となる。しかし環境温度が低いときには最
高画像濃度が低下するので、若干の余裕をもって設定す
ることが必要である。The developing sleeve 3 is made of a thin cylindrical stainless steel material with an outer diameter of 20 mm, the outer circumferential surface of which has been honed to a roughness of 3 μm. rotated in the direction. The diameter of the developing sleeve 3 is set to 15 to 30 mm, although a small diameter sleeve is required due to the miniaturization of the developing device, due to the limitation of the magnetic force of the built-in magnet roller. We also conducted various experiments regarding the rotation speed of the developing sleeve, and found that when the rotation speed is low, the amount of developer supplied is small and the image density when the latent image is developed is also low. Regarding a developing sleeve with an outer diameter of 20 mra, the maximum image density increases linearly when the rotation speed is from 0 to 200 rotations per minute, and reaches a saturated state when the rotation speed is 200 rotations per minute or more. However, when the environmental temperature is low, the maximum image density decreases, so it is necessary to set it with some margin.
前記マグネットローラ４は第３図に示す如くＮおよびＳ
を交互に等間隔に配置した等磁極の１２極の磁石から構
成されるものであるが前記スクレ−パｌＯの接する部分
において反発磁界を形成し、現像剤の剥離を容易にする
ためｌ極欠落させて１１極とし、前記現像スリーブ３内
で固定した状態にて内包されている。なお各磁石の磁力
は像担持体ｌへのキャリア付着を押さえるために大きい
方がよいが、マグネットローラ形状によっては製作上の
限界もあり現像スリーブ３の周面上法線方向での最高磁
束密度を５００〜７００ガウス程度本実施例では６００
ガウスに保たれている。なおマグネットローラ４には７
エライトを用いている。The magnet roller 4 has N and S as shown in FIG.
It is made up of 12 magnets with equal magnetic poles arranged alternately at equal intervals, but in order to form a repulsive magnetic field in the part where the scraper contacts the scraper lO and facilitate the peeling of the developer, the l pole is missing. The number of poles is 11, which is fixedly enclosed within the developing sleeve 3. Note that the magnetic force of each magnet should be large in order to prevent carriers from adhering to the image carrier l, but depending on the shape of the magnet roller there is a manufacturing limit, so the maximum magnetic flux density in the normal direction on the circumferential surface of the developing sleeve 3 is approximately 500 to 700 Gauss, in this example 600
It is kept Gaussian. Note that the magnet roller 4 has 7
Elite is used.
現像スリーブ３と円柱棒５との関係位置は第６図に示す
如く、マグネットローラ４の磁極に対向した位置で、円
柱棒５は現像スリーブ３に押圧され、また誘磁された磁
力によって吸引され、押圧力を高め、現像スリーブ３に
均一に密着するよう作用している。As shown in FIG. 6, the relationship between the developing sleeve 3 and the cylindrical rod 5 is at a position facing the magnetic pole of the magnet roller 4, and the cylindrical rod 5 is pressed against the developing sleeve 3 and attracted by the induced magnetic force. , increases the pressing force to uniformly adhere to the developing sleeve 3.
上記実施例で剛性かつ磁性を有した円柱棒５を層厚規制
部材として翔いた所、現像剤凝集による白スジとか連続
コピー等での層厚規制部材へのトナーのコビリ付き、画
質低下部のない信頼性に優れ良好な画質を得ることが確
認された。また上記の効果は磁性を有する円柱棒の方が
非磁性の円柱棒より優れていることが確認された。なお
上記の磁性を有する円柱棒は誘磁されて現像スリーブ３
側に吸着されるものであっても、また着磁されていて吸
着されるよう作用するものでも差支えない。In the above embodiment, where the rigid and magnetic cylindrical rod 5 is used as a layer thickness regulating member, white streaks due to developer aggregation, toner smearing on the layer thickness regulating member during continuous copying, etc., and image quality deterioration areas may occur. It was confirmed that this method has excellent reliability and provides good image quality. Furthermore, it was confirmed that the above effect is superior to a magnetic cylindrical rod than a non-magnetic cylindrical rod. Note that the magnetic cylindrical rod described above is magnetized and the developing sleeve 3
It may be something that is attracted to the side, or it may be something that is magnetized and acts to be attracted.
実施例１かられかるように現像剤担持体に押圧される剛
性かつ磁性を有する現像剤量規制部材が現像剤の搬送量
を決定する重要な因子は剛性かつ磁性を有する円柱棒を
用いる限りその曲率と押圧力とである。従ってこの曲率
と押圧力を与えるための他の種々の現像剤層規制部材の
例を第７図ないし第１３図に示す。As shown in Example 1, the rigid and magnetic developer amount regulating member pressed against the developer carrier is an important factor in determining the amount of developer conveyed.As long as a rigid and magnetic cylindrical rod is used, They are curvature and pressing force. Therefore, examples of various other developer layer regulating members for providing this curvature and pressing force are shown in FIGS. 7 to 13.
第７図は板バネ１６により円柱棒５を保持し押圧する例
を示し、第８図（ａ）、（ｂ）はさらに板バネ１６の押
圧力を調整ネジ６１によって部分的に調整できる様にし
た例である。板バネ１６’は円柱棒５の軸方向に一体の
もの、スリットにより一部分割したもの、完全に分割し
たもののいずれも好適に実施できる。FIG. 7 shows an example in which the cylindrical rod 5 is held and pressed by the leaf spring 16, and FIGS. This is an example. The plate spring 16' can be suitably implemented as one that is integrated in the axial direction of the cylindrical rod 5, one that is partially divided by a slit, or one that is completely divided.
第９図はコイルバネ１７により押圧力を付与する実施例
である。この例では、円柱棒５の押圧部近傍のみを用い
た半円枝棒５ａとした。コイルバネ１７は半円枝棒５ａ
の軸方向に複数個並べて所望の押圧力を得る様にする。FIG. 9 shows an embodiment in which a pressing force is applied by a coil spring 17. In this example, a semicircular branch rod 5a is used, in which only the vicinity of the pressing portion of the cylindrical rod 5 is used. The coil spring 17 is a semicircular branch rod 5a
Arrange multiple pieces in the axial direction to obtain the desired pressing force.
第１Ｏ図はゴム状の弾性体１８を圧縮させて押圧力を得
る例である。ゴム状弾性体だけでなく樹脂の発泡体でも
同様に実施可能である。FIG. 1O shows an example in which a pressing force is obtained by compressing the rubber-like elastic body 18. Not only rubber-like elastic bodies but also resin foams can be used in the same manner.
第１１図は第９図、第１θ図と同じく円柱棒５を半円柱
５ａとし、圧縮バネ１９により押圧するようにしたもの
である。In FIG. 11, the cylindrical rod 5 is made into a semi-cylindrical column 5a, as in FIGS. 9 and 1θ, and is pressed by a compression spring 19.
第１２図は押圧部が剛性かつ磁性を有すると共に曲率半
径を６＋ｎｍとし、押圧部の上流側にエツジ部を設け、
このエツジ部により現像剤層をあらかじめ所定の厚さに
規制する棒状の現像剤量規制体５ｂである。第１１図及
び第１２図における押圧部は剛性かつ磁極を有する材料
を用いた材質とし、現像スリーブ３上の磁極に対応した
位置又はその近傍を押圧するよう構成することによりい
ずれも全く問題なく使用可能である。In FIG. 12, the pressing part is rigid and magnetic, and has a radius of curvature of 6+ nm, and an edge part is provided on the upstream side of the pressing part.
This edge portion is a rod-shaped developer amount regulating body 5b that regulates the developer layer to a predetermined thickness in advance. The pressing portion in FIGS. 11 and 12 is made of a material that is rigid and has a magnetic pole, and is configured to press at a position corresponding to the magnetic pole on the developing sleeve 3 or in the vicinity thereof, so that both can be used without any problem. It is possible.
第１３図は押圧部を２層構成とし、円柱棒５の外側をウ
レタンゴム又はシリコンゴム等の薄いゴム材５′で被覆
したものである。In FIG. 13, the pressing part has a two-layer structure, and the outside of the cylindrical rod 5 is covered with a thin rubber material 5' such as urethane rubber or silicone rubber.
現像剤量規制体の押圧部を披露するゴム材の厚さは０−
０１” ｌ ｍｍのものが好ましい。The thickness of the rubber material that exposes the pressing part of the developer amount regulator is 0-
01"l mm is preferred.
実施例２
本実施例は第３図の現像装置と同様なものを用いるが現
像スリーブ３の回転方向を像担持体ｌと面する部分で同
一方向にした場合の例である。この場合現像剤量規制体
である円柱棒５は第１４図のような位置に配設する。現
像スリーブ３は表面粗さｌＳの非磁性ステンレス（直径
３０ｄｍｍ）、マグネットローラ４はスリーブ表面磁束
密度が７００ガウスで８極のものを用いた。円柱棒５は
直径７−＋ｎｍで剛性かつ磁性を有するステンレスの５
ＵＳ４１６でマグネットローラ４の磁極近くに配設し非
磁性の押圧板バネ６とホルダー１５とで挟持して保持さ
れたものである。本実施例の第１４図で記載していない
部分は実施例１の第３図で説明した部分と同ように構成
した。円柱棒５は円柱状の磁性体で構成し、現像スリー
ブ３内の固定マグネットローラ４が発する磁界により磁
性体を磁化させ、磁気的吸引力により押圧力を得る装置
である。円柱棒５はその長手方向に均等に分布した磁気
的吸引力で現像スリーブ３を押圧するため、きわめて良
好な現像剤層を得ることができる。Embodiment 2 In this embodiment, a developing device similar to that shown in FIG. 3 is used, but the developing sleeve 3 is rotated in the same direction at the portion facing the image carrier 1. In this case, the cylindrical rod 5 serving as the developer amount regulator is arranged at a position as shown in FIG. The developing sleeve 3 was made of nonmagnetic stainless steel (30 dmm in diameter) with a surface roughness of lS, and the magnetic roller 4 had eight poles and a sleeve surface magnetic flux density of 700 Gauss. The cylindrical rod 5 is made of stainless steel with a diameter of 7-+ nm and is rigid and magnetic.
US416, it is disposed near the magnetic pole of the magnet roller 4 and held between a non-magnetic pressing plate spring 6 and a holder 15. The parts not shown in FIG. 14 of this embodiment were constructed in the same manner as the parts explained in FIG. 3 of the first embodiment. The cylindrical rod 5 is made of a cylindrical magnetic material, and is a device that magnetizes the magnetic material by the magnetic field generated by the fixed magnet roller 4 in the developing sleeve 3 and obtains a pressing force by magnetic attraction force. Since the cylindrical rod 5 presses the developing sleeve 3 with magnetic attraction force evenly distributed in its longitudinal direction, an extremely good developer layer can be obtained.
実施例３
第１６図は第３の実施例を示す現像装置の要部断面図で
、第３図と同一機能部分については同一部品番号で示し
ている。本実施例は押圧部材として非線形弾性体を用い
た例である。Embodiment 3 FIG. 16 is a sectional view of essential parts of a developing device showing a third embodiment, and the same functional parts as in FIG. 3 are designated by the same part numbers. This embodiment is an example in which a nonlinear elastic body is used as the pressing member.
現像スリーブ３は、矢示方向に２５Ｏｒｐｍで回転する
外径２０Ｉｍｍの非磁性ステンレス材を用いた円筒で、
表面はホーニング処理によって３５の表面アラサとなっ
ている。現像スリーブ３の内側には１１極の固定して位
置したマグネットローラ４があって、現像スリーブ表面
において最高磁束密度は６００ガウスに保たれている。The developing sleeve 3 is a cylinder made of non-magnetic stainless steel and has an outer diameter of 20 lmm and rotates at 25 rpm in the direction of the arrow.
The surface has a roughness of 35 by honing. Inside the developing sleeve 3 there is a fixedly positioned magnet roller 4 with 11 poles, and the maximum magnetic flux density is maintained at 600 Gauss on the surface of the developing sleeve.
該マグネットローラ４の磁極に対向した位置で、剛性で
磁性を有した円柱棒５が現像スリーブ３に押圧される。A rigid and magnetic cylindrical rod 5 is pressed against the developing sleeve 3 at a position facing the magnetic pole of the magnet roller 4 .
円柱棒５は磁性のＳ Ｕ Ｓ ４１６を材料とし、直径
６１ｎ＋ｍの真直性のすぐれた円柱棒で、表面アラサは
０．５Ｓにグラインダ加工され、表面皮膜は設けていな
い。円柱棒５はハウジング２に取付けられたホルダー３
５によって側方への移動が規制され、押圧方向には非線
形弾性部材３６によって押圧される。本実施例で用いる
非線形弾性部材は使用範囲において撓み量に対する反発
力の変動のすくない特性をもったもので、第１５図に示
した特性をもったＦＯＲＯＮを用いている。本実施例で
は厚さ２ｍｍで縦横４ｘ５ｍｍの板状をした２個の非線
形弾性部材３６を、ホルダー３５に接着して配設し、円
柱棒５を押圧させた。第１７図はホルダー３５への非線
形弾性部材３６の取付状態を示したもので、円柱棒５の
全長をｎ：ｍ：ｎ＝２：５：２に分割した２点で押圧し
ている。このような条件で２〜４ｇｆ／ｍｍの押圧力が
作用するよう設定したところ、押圧による円柱棒５の撓
みを軽減することが出来、現像スリーブ３の軸方向全域
に亘って均等に７〜１０ｍｇ／ｃｍ”の現像剤量に規制
された２成分現像剤が搬送された。またこの実施例にお
いては特に現像剤の搬送量を規制するための調整箇所を
設けないでも、上記の良好な現像条件が設定・維持され
た。The cylindrical rod 5 is made of magnetic SUS 416, has a diameter of 61n+m, has excellent straightness, has a surface roughness of 0.5S, and has no surface coating. The cylindrical rod 5 is a holder 3 attached to the housing 2
5 restricts lateral movement, and is pressed in the pressing direction by a nonlinear elastic member 36. The nonlinear elastic member used in this embodiment has a characteristic that the repulsion force varies little with respect to the amount of deflection within the range of use, and FORON having the characteristics shown in FIG. 15 is used. In this example, two nonlinear elastic members 36 in the form of plates with a thickness of 2 mm and dimensions of 4 x 5 mm in length and width were disposed by adhering to the holder 35, and pressed against the cylindrical rod 5. FIG. 17 shows the state in which the nonlinear elastic member 36 is attached to the holder 35, and is pressed at two points dividing the entire length of the cylindrical rod 5 into n:m:n=2:5:2. When set to apply a pressing force of 2 to 4 gf/mm under these conditions, it is possible to reduce the deflection of the cylindrical rod 5 due to the pressing force, and it is possible to reduce the deflection of the cylindrical rod 5 by applying pressure of 7 to 10 mg evenly over the entire axial direction of the developing sleeve 3. The two-component developer was transported with the amount of developer regulated at 1/cm". Furthermore, in this example, the above-mentioned favorable developing conditions could be achieved even without providing an adjustment point to regulate the amount of developer transported. was set and maintained.
なお非線形弾性部材３６としては、発泡ウレタンフオー
ムのＦＯＲＯＮ以外に５ＯＲＢＯＴＨＡＮＥ （Ｅ進興
産社製）、ａ−ゲル等が用いられ、モルトプレーンや非
線形バネ等を用いることも可能である。As the nonlinear elastic member 36, in addition to FORON foamed urethane foam, 5ORBOTHANE (manufactured by E-Shin Kosan Co., Ltd.), a-gel, etc. can be used, and it is also possible to use Moltoprene, a nonlinear spring, etc.
また、非線形弾性部材３６による円柱棒５の押圧方法も
、上記実施例で述べた２点支持による押圧方法は円柱棒
５の撓みをすくなくするうえで有効であったが、多数点
支持や連続支持によって押圧するようにすることも可能
である。但しこのような押圧方法によるときは、ホルダ
ー３５の部品精度や平行度等について十分な注意が必要
となる。In addition, regarding the method of pressing the cylindrical rod 5 by the nonlinear elastic member 36, the pressing method using two-point support described in the above embodiment was effective in reducing the deflection of the cylindrical rod 5, but multi-point support or continuous support It is also possible to press it by. However, when such a pressing method is used, sufficient attention must be paid to the precision and parallelism of the parts of the holder 35.
また上記実施例では現像スリーブ３の表面アラサは３Ｓ
、円柱棒５の表面アラ、すは０．５Ｓとした。In the above embodiment, the surface roughness of the developing sleeve 3 is 3S.
The surface roughness of the cylindrical rod 5 was set to 0.5S.
円柱棒５の表面アラサは０．５以下の鏡面に近い状態が
望ましく、一方塊像スリーブ３の表面アラサは必要とす
る現像剤の搬送量を確保する上からも粗面であることが
必要で、現像スリーブ３の表面アラサは円柱棒５の表面
アラサよりも粗（大）であることが好ましい。また長時
間使用によって、現像スリーブ３の表面アラサは次第に
平滑化し、現像剤の搬送量が次第に減少して来る傾向に
ある。The surface roughness of the cylindrical rod 5 is preferably 0.5 or less and is close to a mirror surface, while the surface roughness of the block image sleeve 3 needs to be rough in order to ensure the required amount of developer to be conveyed. It is preferable that the surface roughness of the developing sleeve 3 is rougher (larger) than the surface roughness of the cylindrical rod 5. Furthermore, after long-term use, the surface roughness of the developing sleeve 3 tends to become smoother and the amount of developer conveyed gradually decreases.
之を防止するには現像スリーブ３の表面硬度が高いこと
が望ましく、実験によれば円柱棒５についても同程度の
高硬度であることが望ましい。In order to prevent this, it is desirable that the surface hardness of the developing sleeve 3 is high, and according to experiments, it is desirable that the cylindrical rod 5 also have a similar high hardness.
以上、実施例の説明を行った。The embodiments have been described above.
本発明の実施例ではおもに現像剤量規制体に円柱棒を用
いたが、これらに限定されることなく、少なくとも押圧
部が剛性かつ磁性を有し、その曲率半径が０．５〜１５
ｍｍの棒状体であれば良いものである。In the embodiments of the present invention, a cylindrical rod is mainly used as the developer amount regulating body, but the present invention is not limited to this.
A rod-shaped body with a diameter of mm is sufficient.
また本発明において用いられる現像条件、現像剤成分と
しては、下記のものがある。本発明の現像装置において
は像担持体ｌに対する前記現像スリーブ３の間隔すなわ
ち第６図におけるｄの値を０．３ｍｎ＋〜０．７ｍｍさ
らには０．４ｍＩｍ〜０．６ｍｍとすることが好ましい
。像担持体ｌに対する現像スリーブ３の間隔を小さくす
ることは、電界効果を大きくし、電気力線の方向を整え
るので、現像詩画像のボケが生じることがない。かりに
平均値の０．５ｍｍにとった場合に現像剤の穂の高さは
、前記のような多極マグネットローラを選定することに
よって、２００μｆｆｌ〜４５０μｍとなるので、穂先
と潜像面の間隙Ｓ−ｄは０．０２ｍｍ 〜０．３＋ｍす
なわち （０，１〜０．６）ｘ ｄに相当する値を保つ
ことが出来ることとなる。Furthermore, the developing conditions and developer components used in the present invention include the following. In the developing device of the present invention, it is preferable that the distance between the developing sleeve 3 and the image carrier 1, that is, the value of d in FIG. 6, be 0.3 mn+ to 0.7 mm, and more preferably 0.4 mIm to 0.6 mm. Reducing the distance between the developing sleeve 3 and the image carrier 1 increases the electric field effect and adjusts the direction of the electric lines of force, so that blurring of the developed image does not occur. If the average value is 0.5 mm, the height of the developer spike will be 200 μffl to 450 μm by selecting the multipolar magnet roller as described above, so the gap S between the tip and the latent image surface will be -d can be maintained at a value equivalent to 0.02 mm to 0.3+m, that is, (0,1 to 0.6) x d.
本発明で使用する現像剤は二成分系現像剤が好適である
。規制体に付着する現像剤成分をキャリアにより自浄す
る働きがあるためと考えられ、成分現像剤の場合よりも
長期間安定した現像剤層を形成し得る。二成分系現像剤
の例としては粒径が６μｍ”１８μｍの非磁性のトナー
と、フェライトコアに樹脂材を被覆した粒径がｌＯμｍ
＝ １００μｍ（好ましくは３０μｍ〜６０μｍ）のキ
ャリアとから成る現像剤が本発明を適用した現像装置に
好ましく用いられ、トナーの説明をすると以下の通りで
ある。The developer used in the present invention is preferably a two-component developer. This is thought to be due to the ability of the carrier to self-clean the developer components adhering to the regulating body, and it is possible to form a developer layer that is more stable for a longer period of time than in the case of component developers. Examples of two-component developers include a non-magnetic toner with a particle size of 6 μm and 18 μm, and a ferrite core coated with a resin material with a particle size of 10 μm.
A developer comprising a carrier of = 100 μm (preferably 30 μm to 60 μm) is preferably used in the developing device to which the present invention is applied, and the toner will be explained as follows.
■ 熱可塑性樹脂（結着剤）（８０〜９Ｑ）ｗｔ％例：
ポリスチレン、スチレンアクリル重合体、ポリエステル
、ポリビニルブチラール、エポキシ樹脂、ポリアミド樹
脂、ポリエチレン、エチレン酢ビ共重合体など、あるい
は上記の混合物■ 顔料（着色剤）０〜１５ｗｔ％
例：黒：カーポンブラック
イエロー：ベンジジン誘導体
マゼンタ：ローダミンＢレーキ、カーミン６Ｂなど
シアン：銅フタロシアニン、スルホンアミド誘導体染料
など
■ 荷電制御剤 ０〜５ｗｔ％
プラスドナー：ニグロシン系の電子供与性染料、アルコ
キシル
ート、顔料、４級アンモニウム塩など
マイナストナー：電子受容性の有機錯体、塩素化パラフ
ィン、塩素化ポリエステル、酸基過剰のポリエステル、
塩素化銅フタロシアニンなど■ 流動化剤
例：コロイダルシリ力、疎水性シリカ、シリコンフェス
、金属石ケン、非イオン界面活性剤なと
■ クリーニング剤．（感光体上のトナーのフィルミン
グを防止）
例：脂肪酸金属塩、表面に有機基をもつ酸化ケイ素酸、
フッ素系界面活性剤など
■ 充填剤（画像の表面光沢の改良、原材料費の低減）
例：炭酸カルシウム、クレー タルク、顔料などこれら
の材料のほか、画像面へのかぶりやトナー飛散を防ぐた
め、磁性粉を少量含有させてもよい。■ Thermoplastic resin (binder) (80-9Q) wt% example:
Polystyrene, styrene acrylic polymer, polyester, polyvinyl butyral, epoxy resin, polyamide resin, polyethylene, ethylene-vinyl acetate copolymer, etc., or a mixture of the above ■ Pigment (coloring agent) 0 to 15 wt% Example: Black: Carpon Black Yellow: Benzidine derivatives Magenta: Rhodamine B lake, Carmine 6B, etc. Cyan: Copper phthalocyanine, sulfonamide derivative dyes, etc. ■ Charge control agent 0 to 5 wt% Positive donor: Nigrosine-based electron-donating dyes, alkoxy roots, pigments, quaternary ammonium salts, etc. Minus toner: electron-accepting organic complex, chlorinated paraffin, chlorinated polyester, polyester with excess acid groups,
Chlorinated copper phthalocyanine, etc. ■ Examples of fluidizing agents: colloidal silica, hydrophobic silica, silicon face, metal soap, nonionic surfactants, etc. ■ Cleaning agents. (Prevents toner filming on the photoconductor) Examples: Fatty acid metal salts, silicon oxides with organic groups on the surface,
Fluorine surfactants, etc. ■ Fillers (Improves image surface gloss, reduces raw material costs) Examples: Calcium carbonate, clay Talc, pigments, etc. In addition to these materials, to prevent fogging on the image surface and toner scattering, A small amount of magnetic powder may be included.
このような磁性粉としては粒径０．１μｍ−１ｐｍの四
三酸化鉄、γー酸化第二鉄、二酸化クロム、ニッケルフ
ェライト、鉄合金粉末などが用いられ、（０．１〜５）
曹ｔ％含有される。さらに鮮明な色を保つためには１ｗ
ｔ％以下とするのが望ましい。As such magnetic powder, triiron tetroxide, γ-ferric oxide, chromium dioxide, nickel ferrite, iron alloy powder, etc. with a particle size of 0.1 μm-1 pm are used.
Contains t% of sodium carbonate. To maintain even clearer colors, 1w
It is desirable to set it to t% or less.
なお、約２０ｋｇ／ｃｍの力で塑性変形して紙に定着さ
せる圧力定着用トナーに適する樹脂としては、ワックス
、ポリオレフィン類、エチレン酢酸ビニル共重合体、ポ
リウレタン、ゴムなどの粘着性樹脂などが用いられる。Note that adhesive resins such as wax, polyolefins, ethylene vinyl acetate copolymers, polyurethane, and rubber are used as resins suitable for pressure fixing toners that are plastically deformed and fixed to paper with a force of about 20 kg/cm. It will be done.
一方、像担持体ｌ側の表面電位は一６００Ｖ，露光部電
位はθ〜−１００Ｖとし、また現像スリーブ３に対して
はＤＣバイアスが一５００Ｖ， ＡＣバイアスが７００
Ｖ（ｒｍｓ）、周波数４ ｋＨｚの電圧が印加すること
を条件として現像を試みたところ極めて、高解像力にて
階調の整った良質のトナー像が得られることが確認され
た。On the other hand, the surface potential on the image carrier l side is -600V, the exposed part potential is θ~-100V, and the DC bias for the developing sleeve 3 is -1500V and the AC bias is 700V.
When development was attempted under the condition that a voltage of V (rms) and frequency of 4 kHz was applied, it was confirmed that a high quality toner image with extremely high resolution and uniform gradation could be obtained.
以上述べたごとく本発明の現像装置は剛性を有する現像
剤担持体に同じ剛性かつ磁性を有していて小さな曲率半
径の剛性を有する磁性部材で形成した現像剤量規制体を
押圧して現像剤層形成部を構成したことにより、現像剤
担持体の回転速度や押圧位置などの変化に対し影響され
ず又特に押圧力変動に対する搬送量の安定性に富み、安
定した厚みの現像剤層を得ることが出来る。従って、従
来のものと比して低荷重で均一安定した現像剤層を得る
ようになった。As described above, the developing device of the present invention presses a developer amount regulating body formed of a magnetic member having the same rigidity and magnetism and a rigidity with a small radius of curvature on a rigid developer carrying member, thereby discharging the developer. By configuring the layer forming part, it is not affected by changes in the rotational speed of the developer carrier or the pressing position, and the amount of conveyance is particularly stable against fluctuations in pressing force, so that a developer layer with a stable thickness can be obtained. I can do it. Therefore, a uniform and stable developer layer can be obtained at a lower load than in the conventional method.
さらに、異物による目づまりを−おこしにくい点や凝集
トナーや現像剤層の粉砕性もすぐれ、白すじが画像に出
にくい。また、現像剤量規制部材の現像剤担持体に対す
る押圧部での押圧力の変化による規制後の現像剤量の変
動がきわめて小さく、現像性の優れた現像装置が可能と
なり、特に二成分現像剤での規制部材への現像剤成分の
付着を防止し、従って安定してムラのない薄層が形成出
来、濃度ムラ、濃度低下等をきたさぬ、品質の優れた画
像が提供出来る。Furthermore, it is less likely to cause clogging due to foreign matter, and has excellent pulverization properties for the agglomerated toner and developer layer, making it difficult for white streaks to appear on images. In addition, fluctuations in the amount of developer after regulation due to changes in the pressing force of the pressing portion of the developer amount regulating member against the developer carrier are extremely small, making it possible to provide a developing device with excellent developing performance, especially for two-component developers. It is possible to prevent the developer components from adhering to the regulating member during the process, thereby making it possible to form a stable and even thin layer, thereby providing an image of excellent quality without uneven density or reduction in density.
本発明の現像装置は規制部材の長期使用時における変形
がなく磁力による吸引力の変化も少ないので規制装置と
しての耐久性がきわめて大きい。The developing device of the present invention has extremely high durability as a regulating device because the regulating member does not deform during long-term use and there is little change in the attraction force due to magnetic force.
さらに量産時にも比較的取付精度の許容度が大きく、実
用性に富んだものである。Furthermore, even during mass production, there is a relatively large tolerance for mounting accuracy, making it highly practical.
かつ、現像剤規制面積が小さいので不必要な現像剤との
摩擦帯電による悪影響も生じにくく、良好な画像を得る
ことが出来る。In addition, since the developer regulating area is small, it is difficult to have an adverse effect due to unnecessary frictional charging with the developer, and a good image can be obtained.
それに加え、規制部材の交換を行う場合においても、取
付が容易であり、メンテナンス性が高い。In addition, even when the regulating member is replaced, installation is easy and maintainability is high.
また、円柱棒の押圧材として非線形弾性部材を用いると
きは、ケーシングやホルダ一部分の部品精度の誤差や組
立時のバラツキを吸収することとなり、調整箇所を設け
ないでも、常に安定して良好な現像剤量の搬送がなされ
る現像装置が提供されることとなった。In addition, when a nonlinear elastic member is used as a pressing material for the cylindrical rod, it absorbs errors in the precision of parts of the casing and holder and variations during assembly, and even without adjusting parts, stable and good development can be achieved. A developing device capable of conveying the amount of toner has now been provided.
第１図は本発明の基本となった実験を示す説明図。
第２図は第１図の実験によって得られた磁性の有無、押
圧部での曲率、押圧力と搬送量との関係を示す図。
第３図は第１の実施例を示す構成図で、第４図、第５図
は之によって得られる関係グラフ。
第６図は像担持体と現像スリーブとの間での現像の説明
図。
第７図ないし第１３図は第１の実施例での他の適用例を
示す要部図。
第１４図は第２の実施例を示す構成図。
第１５図は非線形弾性体の一例について、撓みと荷重と
の関係を示すグラフ。
第１６図は第３の実施例を示す構成図で、第１７図はそ
の要部斜視図。
ｌ・・・像担持体
４・・・マグネットローラ
５・・・棒状体（円柱棒）
６・・・バネ材
３６・・・非線形弾性部材
３・・・現像スリーブ
１５．３５・・・ホルダーFIG. 1 is an explanatory diagram showing the experiment that formed the basis of the present invention. FIG. 2 is a diagram showing the relationship between the presence or absence of magnetism, the curvature at the pressing part, the pressing force, and the amount of conveyance obtained by the experiment shown in FIG. 1. FIG. 3 is a configuration diagram showing the first embodiment, and FIGS. 4 and 5 are relationship graphs obtained thereby. FIG. 6 is an explanatory diagram of development between an image carrier and a developing sleeve. 7 to 13 are main part diagrams showing other application examples of the first embodiment. FIG. 14 is a configuration diagram showing a second embodiment. FIG. 15 is a graph showing the relationship between deflection and load for an example of a nonlinear elastic body. FIG. 16 is a configuration diagram showing the third embodiment, and FIG. 17 is a perspective view of the main parts thereof. l... Image carrier 4... Magnet roller 5... Rod-shaped body (cylindrical rod) 6... Spring member 36... Nonlinear elastic member 3... Developing sleeve 15. 35... Holder
Claims (1)
現像剤を担持する剛性を有する現像剤担持体と、該磁石
体に対向して該担持体に押圧され、該担持体に担持され
た現像剤の量を規制する棒状の現像剤量規制体とを有し
、該規制体の該担持体との押圧部が剛性かつ磁性を有す
る材料であると共に、曲率半径が０．５〜１５ｍｍであ
ることを特徴とする現像装置。a fixed magnet body, a developer carrier having the magnet body inside and having a rigidity to support a developer on the surface; has a rod-shaped developer amount regulating body that regulates the amount of developer supported on the carrier, and a pressing portion of the regulating body with the carrier is made of a rigid and magnetic material, and has a radius of curvature of 0. A developing device characterized in that the diameter is 5 to 15 mm.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63167076A JP2733605B2 (en) | 1988-05-18 | 1988-07-04 | Developing device |
| EP89304461A EP0341894B1 (en) | 1988-05-09 | 1989-05-03 | Image forming apparatus |
| DE68923484T DE68923484T2 (en) | 1988-05-09 | 1989-05-03 | Image recorder. |
| US07/604,321 US5054419A (en) | 1988-05-09 | 1990-10-25 | Image forming apparatus |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12226488 | 1988-05-18 | ||
| JP63-122264 | 1988-05-18 | ||
| JP63167076A JP2733605B2 (en) | 1988-05-18 | 1988-07-04 | Developing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0250184A true JPH0250184A (en) | 1990-02-20 |
| JP2733605B2 JP2733605B2 (en) | 1998-03-30 |
Family
ID=26459420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63167076A Expired - Lifetime JP2733605B2 (en) | 1988-05-09 | 1988-07-04 | Developing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2733605B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5325637A (en) * | 1991-10-31 | 1994-07-05 | Konica Corporation | Developing apparatus with an improved sleeve |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6046577A (en) * | 1983-08-24 | 1985-03-13 | Fuji Xerox Co Ltd | Nonmagnetic single-component developing device |
| JPS6275479A (en) * | 1985-09-27 | 1987-04-07 | Canon Inc | Developing device |
-
1988
- 1988-07-04 JP JP63167076A patent/JP2733605B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6046577A (en) * | 1983-08-24 | 1985-03-13 | Fuji Xerox Co Ltd | Nonmagnetic single-component developing device |
| JPS6275479A (en) * | 1985-09-27 | 1987-04-07 | Canon Inc | Developing device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5325637A (en) * | 1991-10-31 | 1994-07-05 | Konica Corporation | Developing apparatus with an improved sleeve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2733605B2 (en) | 1998-03-30 |
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