JPS638156A - Image forming device - Google Patents
Image forming deviceInfo
- Publication number
- JPS638156A JPS638156A JP61147851A JP14785186A JPS638156A JP S638156 A JPS638156 A JP S638156A JP 61147851 A JP61147851 A JP 61147851A JP 14785186 A JP14785186 A JP 14785186A JP S638156 A JPS638156 A JP S638156A
- Authority
- JP
- Japan
- Prior art keywords
- transfer material
- roller
- image
- guide
- rotating body
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 claims description 42
- 239000002344 surface layer Substances 0.000 claims description 4
- 239000011162 core material Substances 0.000 claims 1
- 239000002184 metal Substances 0.000 abstract description 9
- 230000005611 electricity Effects 0.000 abstract description 7
- 230000003068 static effect Effects 0.000 abstract description 7
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241000218645 Cedrus Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Paper Feeding For Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分計
本発明は、複写機或いはレーザービームプリンタ等の画
像形成装置に係り、詳しくは転写材を案内する転写材案
内装置に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Utilization The present invention relates to an image forming apparatus such as a copying machine or a laser beam printer, and more particularly to a transfer material guiding device for guiding a transfer material.
（ロ）従来の技術
従来、画像形成装置、例えば複写機における転写材案内
装置には、転写材の上下方向を規制・案内する１対の転
写材案内板により構成したもの、或いは転写材を挾持・
回転する１対の金属ローラにより構成したものがある。(B) Conventional technology Conventionally, a transfer material guide device in an image forming apparatus, for example, a copying machine, has been configured with a pair of transfer material guide plates that regulate and guide the transfer material in the vertical direction, or has been configured with a pair of transfer material guide plates that regulate and guide the transfer material in the vertical direction.・
Some devices are constructed from a pair of rotating metal rollers.
（ハ）発明が解決しようとする問題点
ところで、前記転写材案内装置、即ち１対の転写材案内
板の場合、該案内板は搬送力を有さないために、腰の強
い転写材を案内して像担持体と当接した際に、該転写材
の位置が狂って画像ずれを起こす乙とがあった。また、
金属ローラの場合、該ローラは、転写材との摩擦による
静電気を蓄積して静電吸着力を生じるためＮ画材を吸着
して汚れ、次に搬送されてくる転写材を汚れた金属ロー
ラが挾持するため転写材を汚してしまう事があった。こ
のため、金属ローラを接地する必要があるが、電気抵抗
が低下した吸湿転写材を使用する場合、該転写材の表面
を通して転写電荷がリークして転写不良を生じることが
あり不都合であった。(c) Problems to be solved by the invention In the case of the transfer material guide device, that is, a pair of transfer material guide plates, the guide plates do not have a conveying force, so they guide a stiff transfer material. When the transfer material comes into contact with the image carrier, the position of the transfer material may be shifted, causing image shift. Also,
In the case of a metal roller, the roller accumulates static electricity due to friction with the transfer material and generates electrostatic adsorption force, so it attracts the N art material and gets dirty, and then the dirty metal roller pinches the transferred transfer material. As a result, the transfer material could be contaminated. For this reason, it is necessary to ground the metal roller, but when using a moisture-absorbing transfer material with reduced electrical resistance, transfer charges may leak through the surface of the transfer material, resulting in poor transfer, which is inconvenient.
（ロ） 問題を解決するための手段
本発明は、上述問題点を解消することを一目的とするも
のであり、転写材案内部材の像担持体側に、表面層がゴ
ム等の高摩擦係数でかつ高電気抵抗を有する杉材から成
る回転体を配設し、該回転体が回転して転写材を像担持
体へ案内するように構成したことを特徴とするものであ
る。(b) Means for Solving the Problems The present invention aims to solve the above-mentioned problems, and the surface layer of the transfer material guide member on the image carrier side is made of rubber or other material with a high friction coefficient. The present invention is characterized in that a rotating body made of cedar wood having high electrical resistance is provided, and the rotating body rotates to guide the transfer material to the image carrier.
（ホ） 作用
上述構成ｌζ基づき、転写材がレジストローラにより挟
持・搬送され、かつ上下転写材案内部材により案内され
る。更に、該転写材は回転体の摩擦力により転写位置へ
搬送・案内され、かつ転写帯電器により像担持体上の顕
画像を転写される。(E) Function Based on the above-described configuration lζ, the transfer material is held and conveyed by the registration rollers, and is guided by the upper and lower transfer material guide members. Further, the transfer material is conveyed and guided to the transfer position by the frictional force of the rotating body, and the visible image on the image carrier is transferred by the transfer charger.
（へ）実施例
以下、図面に沿って、本発明の実施例について説明する
。(F) Examples Examples of the present invention will be described below with reference to the drawings.
複写機における転写材案内装置（以下シートガイド装置
という）１は、第１図に示すように、シート６の上下方
向を帽１案内する１対の固定ガイド板２ａ、２ｂとシー
ト６を像担持体（以下感動ドラムという）９の表面周速
と略々等しい表面周速で回転して案内するガイドローラ
３を有しており、該ガイド板２ａ、２ｂと該ローラ３と
は静電気を所定電圧以上蓄積しないようにバリスタ５を
介して接地されている。そして、該シートガイド装置１
の上流側にはシート６を挾持・搬送するレジストローラ
対７が配設されており、また該装置１の下流側には、表
面に画像を担持する感光ドラム９と、顕画像をシート６
へ転写する転写帯電＠１０が配設されており、更に該感
光ドラム９に近接して図示しない露光装置により感光ド
ラム９上に形成された潜画像を現出させる現像装置１１
が配設されている。As shown in FIG. 1, a transfer material guide device (hereinafter referred to as a sheet guide device) 1 in a copying machine includes a pair of fixed guide plates 2a and 2b that guide a cap 1 in the vertical direction of a sheet 6, and a sheet 6 that carries an image. It has a guide roller 3 that rotates and guides at a surface circumferential speed that is approximately equal to the surface circumferential speed of a body (hereinafter referred to as a moving drum) 9, and the guide plates 2a, 2b and the roller 3 are arranged to reduce static electricity to a predetermined voltage. It is grounded via the varistor 5 to prevent any further accumulation. Then, the sheet guide device 1
A pair of registration rollers 7 for holding and conveying the sheet 6 is disposed on the upstream side of the device 1, and a photosensitive drum 9 that carries an image on its surface and a photosensitive drum 9 that carries an image on the surface of the sheet 6 is disposed downstream of the device 1.
A transfer charger @ 10 for transferring the image to the photosensitive drum 9 is disposed, and a developing device 11 for developing the latent image formed on the photosensitive drum 9 by an exposure device (not shown) is located close to the photosensitive drum 9.
is installed.
一方、前記ガイドローラ３は、第２図に詳示するように
、軸３ｃに固定されており、該軸３ｃば図示しない本体
側板により支持されている。そして、該軸３ｃの一端に
は図示しないモータの回転を伝達するギヤ１３が固定さ
れており、またガイドローラは表層部をゴム部材３ａに
より覆われた金属ローラ３ｂにより構成されている。更
に、該ゴム部材３ａは、トナーが付着しても溶解しない
組成の部材により構成されており、該ゴム部材３８表面
と金属ローラ３ｂ中心間の電気抵抗は、ゴム部材の３８
のカーボン等の含有量を調節することにより、バリスタ
５の能力を十分発揮するような電気抵抗値に設定されて
いる。そして、ガイドローラ３には、シート６通過領域
外にガイドロー９３表面に付着したトナーを除去するク
リーニング装置１２が付設されており、該クリーニング
装置１２が該ローラ３表面を清掃することにより、該ロ
ーラ３は摩擦力と電気抵抗を一定に保つように構成され
ている。On the other hand, the guide roller 3, as shown in detail in FIG. 2, is fixed to a shaft 3c, and the shaft 3c is supported by a side plate of the main body (not shown). A gear 13 for transmitting the rotation of a motor (not shown) is fixed to one end of the shaft 3c, and the guide roller is constituted by a metal roller 3b whose surface layer is covered with a rubber member 3a. Further, the rubber member 3a is made of a member having a composition that does not dissolve even if toner adheres to it, and the electrical resistance between the surface of the rubber member 38 and the center of the metal roller 3b is equal to 38
By adjusting the content of carbon, etc., the electrical resistance value is set so that the varistor 5 can fully demonstrate its capabilities. The guide roller 3 is provided with a cleaning device 12 for removing toner adhering to the surface of the guide roller 93 outside the sheet 6 passing area. The roller 3 is configured to maintain constant frictional force and electrical resistance.
本実施例は以上のような構成よりなるので、オペレータ
がコピースタートボタン（図示せず）を押圧操作すると
、シート６は図示しない給紙ローラによりレジストロー
ラ対７へ搬送される。そして、該シート６はレジストロ
ーラ対７により感光ドラム９上に担持されている画像と
同期して挾持・搬送され、また該シート６は上下をガイ
ド板２ａ、２ｂにより規制・案内される。更に、該シー
１−６は、高摩擦力により搬送力を有するガイドローラ
３により張った状態で感光ドラム９と転写帯電器１０と
の間の転写位置へ案内され、該シート６は、現像装置１
１により感光ドラム９上に現出した顕画像を転写帯電器
１０により転写される。Since the present embodiment has the above-described configuration, when the operator presses a copy start button (not shown), the sheet 6 is conveyed to the pair of registration rollers 7 by a paper feed roller (not shown). The sheet 6 is held and conveyed by a pair of registration rollers 7 in synchronization with the image carried on the photosensitive drum 9, and the sheet 6 is regulated and guided from top to bottom by guide plates 2a and 2b. Furthermore, the sheet 1-6 is guided to a transfer position between the photosensitive drum 9 and the transfer charger 10 in a stretched state by a guide roller 3 having a conveying force due to high frictional force, and the sheet 6 is transferred to a developing device. 1
1, the visible image appearing on the photosensitive drum 9 is transferred by a transfer charger 10.
この際、ガイド板２ａ、２ｂとガイドローラ３とはシー
ト６との摩擦により静電気を発生するが、該ガイド板２
ａ、２ｂと該ローラ３とは、所定電圧になると電気抵抗
を激減するバリスタ５により静電気を接地側へ放出し、
また該バリスタ５は所定電圧以下では高い抵抗値を有し
て電圧が所定電圧以下になることはない。そして、該シ
ート６は、図示しない定着部により定着され、更に図示
しない排出ローラにより複写機外へ排出されてコピーは
終了する。At this time, the guide plates 2a, 2b and the guide roller 3 generate static electricity due to friction with the sheet 6.
a, 2b and the roller 3 discharge static electricity to the ground side by a varistor 5 that drastically reduces electrical resistance when a predetermined voltage is reached.
Further, the varistor 5 has a high resistance value when the voltage is below a predetermined voltage, and the voltage does not become below the predetermined voltage. Then, the sheet 6 is fixed by a fixing section (not shown), and then ejected from the copying machine by an ejection roller (not shown) to complete the copying.
また、他の実施例と、して、ガイドローラ３とシート６
との摩擦係数が１以上であると、該四−ラ３は適宜な搬
送力を有してシート６を張った状態で搬送することがで
きる。In addition, in another embodiment, the guide roller 3 and the sheet 6
When the coefficient of friction with the sheet 6 is 1 or more, the four-layer 3 has an appropriate conveying force and can convey the sheet 6 in a stretched state.
更に、他の実施例として、ガイドローラ３のゴム部材３
ａと金属ローラ３ｂとの電気抵抗が１０８Ω以下で、よ
り好ましくは１０４Ω以下であり、該ローラ３を支持す
る支持部材の電気抵抗が１０８Ω以下であると、バリス
タ５の電圧設定を自由に変えられ、その特性を十分発揮
する乙とができる。Furthermore, as another embodiment, the rubber member 3 of the guide roller 3
When the electrical resistance between the metal roller a and the metal roller 3b is 108Ω or less, more preferably 104Ω or less, and the electrical resistance of the support member that supports the roller 3 is 108Ω or less, the voltage setting of the varistor 5 can be freely changed. , B can fully demonstrate its characteristics.
また、他の実施例として、ガイドローラ３とガイド板２
ａ、２ｂとをバリスタ５を介して接地すると、該ローラ
３と該ガイド板２ａ、２ｂとは所定電圧以上に静電気を
蓄積せず、トナーを吸着して汚れることがなく、また所
定電圧以下とならなしくので、シート６の転写用電荷が
接地側へ流出するのを防止する。In addition, as another embodiment, the guide roller 3 and the guide plate 2
a, 2b are grounded via the varistor 5, the roller 3 and the guide plates 2a, 2b will not accumulate static electricity above a predetermined voltage, will not attract toner and get dirty, and will not have a voltage below a predetermined voltage. Therefore, the transfer charges on the sheet 6 are prevented from flowing to the ground side.
更に、他の実施例として、ガイドローラ３の表面周速が
感光ドラム９の表面周速の９０％以上、かつ１１０以下
であると、転写画像のずれを防止すると共に、転写画像
の伸び縮みを防止する。Furthermore, as another example, if the surface circumferential speed of the guide roller 3 is 90% or more and 110% or less of the surface circumferential speed of the photosensitive drum 9, the displacement of the transferred image is prevented and the expansion and contraction of the transferred image is prevented. To prevent.
また、他の実施例として、第３図に示すように、感光ド
ラム９及び現像袋［１１等の複写部が着脱可能なプロセ
スカートリッジ１５であり、該カートリッジ１５により
ガイドローラ３が支持されると、該ローラ３と感光ドラ
ム９との間の距離はどの複写機においても等しくするこ
とができ、該ローラ３の位置を調節する手間を省くこと
ができる。As another embodiment, as shown in FIG. 3, there is provided a process cartridge 15 in which a photosensitive drum 9 and a copying section such as a developing bag [11] are removably attached, and a guide roller 3 is supported by the cartridge 15. , the distance between the roller 3 and the photosensitive drum 9 can be made the same in all copying machines, and the effort of adjusting the position of the roller 3 can be saved.
（ト）発明の詳細
な説明したように、本発明によると、転写材ガイド部材
の像担持体側に回転する回転体を設けると、該回転体の
表層は高摩擦抵抗体であるため一７＝
に該回転体は搬送力を有するので、転写材は張った状態
で案内されて画像ずれを起こすことを防止できる。また
、該回転体と転写材ガイド部材はバリスタを介して接地
されているので、該回転体と該ガイド部材は所定電圧以
上の静電気を蓄積せず、顕画材を吸着することを防止で
きて転写材が汚れるのを防止する。更に、該バリスタに
より所定電圧以下とはならないので、電気抵抗の低い転
写材を使用しても転写電荷がリークして転写不良を起こ
すことを防止できる。(G) As described in detail, according to the present invention, when a rotating body is provided on the image carrier side of the transfer material guide member, the surface layer of the rotating body is a high frictional resistance body. Furthermore, since the rotating body has a conveying force, the transfer material is guided in a taut state, thereby preventing image misalignment. In addition, since the rotating body and the transfer material guide member are grounded via the varistor, the rotating body and the guide member do not accumulate static electricity exceeding a predetermined voltage, and can prevent the developing material from being attracted to the transfer material. Prevent the material from getting dirty. Furthermore, since the voltage does not fall below a predetermined voltage due to the varistor, even if a transfer material with low electrical resistance is used, it is possible to prevent transfer charges from leaking and causing transfer defects.
第１図は本発明に係る複写機の概略構成を示す図、第２
図は本発明に係るガイドローラを示す図であり、（ａ）
はその側面図、（ｂ）はその斜視図である。第３図は他
の実施例を示す側面−図である。
１・・・転写材案内装置 、 ３・・・回転体（ガイド
ローラ） 、 ６・・転写材 、 ９・・・像担持体（
感光ドラム） 。
第２図
第３図FIG. 1 is a diagram showing a schematic configuration of a copying machine according to the present invention, and FIG.
The figure is a diagram showing a guide roller according to the present invention, (a)
is its side view, and (b) is its perspective view. FIG. 3 is a side view showing another embodiment. DESCRIPTION OF SYMBOLS 1... Transfer material guide device, 3... Rotating body (guide roller), 6... Transfer material, 9... Image carrier (
photosensitive drum). Figure 2 Figure 3
Claims (6)
ラにて像担持体と同期して搬送される転写材の両面を案
内する転写材案内部材を備えてなる画像形成装置におい
て、 前記転写材案内部材の像担持体側に、表面層がゴム等の
高摩擦係数でかつ高電気抵抗を有する材料から成る回転
体を配設し、該回転体が回転して転写材を像担持体へ案
内するように構成したことを特徴とする画像形成装置。(1) In an image forming apparatus comprising an image carrier, a registration roller, and a transfer material guide member that guides both sides of a transfer material that is conveyed by the registration roller in synchronization with the image carrier, the transfer material guide includes: A rotating body whose surface layer is made of a material such as rubber having a high coefficient of friction and high electrical resistance is disposed on the image carrier side of the member, and the rotating body rotates to guide the transfer material to the image carrier. An image forming apparatus characterized in that it is configured as follows.
特許請求の範囲第１項記載の画像形成装置。(2) The image forming apparatus according to claim 1, wherein the rotating body has a friction coefficient of 1 or more with respect to the transfer material.
０＾８Ω以下である特許請求の範囲第１項記載の画像形
成装置。(3) The electrical resistance between the core material and surface material of the rotating body is 1
The image forming apparatus according to claim 1, wherein the resistance is 0^8Ω or less.
＾８Ω以下である特許請求の範囲第１項記載の画像形成
装置。(4) The electrical resistance of the support member that supports the rotating body is 10
The image forming apparatus according to claim 1, which has a resistance of ^8Ω or less.
て接地した特許請求の範囲第１項記載の画像形成装置。(5) The image forming apparatus according to claim 1, wherein the rotating body and the transfer material guide member are grounded via a varistor.
０％以上かつ１１０％以下である特許請求の範囲第１項
記載の画像形成装置。(6) The surface circumferential speed of the rotating body is 9% of the surface circumferential speed of the image carrier.
The image forming apparatus according to claim 1, wherein the ratio is 0% or more and 110% or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61147851A JPS638156A (en) | 1986-06-24 | 1986-06-24 | Image forming device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61147851A JPS638156A (en) | 1986-06-24 | 1986-06-24 | Image forming device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS638156A true JPS638156A (en) | 1988-01-13 |
Family
ID=15439690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61147851A Pending JPS638156A (en) | 1986-06-24 | 1986-06-24 | Image forming device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS638156A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0480217A (en) * | 1990-07-20 | 1992-03-13 | Asahi Glass Co Ltd | Fluorine-containing water and oil repellent |
| KR20220141184A (en) * | 2021-04-12 | 2022-10-19 | 신무현 | Pogo pin receptacle |
-
1986
- 1986-06-24 JP JP61147851A patent/JPS638156A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0480217A (en) * | 1990-07-20 | 1992-03-13 | Asahi Glass Co Ltd | Fluorine-containing water and oil repellent |
| KR20220141184A (en) * | 2021-04-12 | 2022-10-19 | 신무현 | Pogo pin receptacle |
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