JPH04345448A - Structure of resist roller - Google Patents
Structure of resist rollerInfo
- Publication number
- JPH04345448A JPH04345448A JP3117389A JP11738991A JPH04345448A JP H04345448 A JPH04345448 A JP H04345448A JP 3117389 A JP3117389 A JP 3117389A JP 11738991 A JP11738991 A JP 11738991A JP H04345448 A JPH04345448 A JP H04345448A
- Authority
- JP
- Japan
- Prior art keywords
- registration roller
- paper
- resist roller
- rubber
- roller
- 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
- 230000007246 mechanism Effects 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000007723 transport mechanism Effects 0.000 description 2
- 239000000872 buffer Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Delivering By Means Of Belts And Rollers (AREA)
- Registering Or Overturning Sheets (AREA)
- Paper Feeding For Electrophotography (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】本発明は、単票用紙等の媒体を搬
送する搬送機構に使用される、媒体先端そろえ用レジス
トローラの構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a registration roller for aligning the leading edge of a medium used in a conveyance mechanism for conveying a medium such as a cut sheet.
【0002】0002
【従来の技術】図3は従来の画像記録装置の概要を示す
側面図で、図中、1は円筒状のレジストローラ、2は該
レジストローラ1にレジスト圧Pで圧接する従動ローラ
(ゴムローラ)、3は感光ドラム、4は給紙部である。
感光ドラム3の周囲には、図示を省略したが、前帯電器
,露光用の光学ユニット,現像器,転写帯電器,AC分
離帯電器,転写後除電器,クリーナ等が配置されている
。2. Description of the Related Art FIG. 3 is a side view showing an outline of a conventional image recording apparatus. In the figure, 1 is a cylindrical registration roller, and 2 is a driven roller (rubber roller) that presses against the registration roller 1 with a registration pressure P. , 3 is a photosensitive drum, and 4 is a paper feeding section. Although not shown, a pre-charger, an optical unit for exposure, a developer, a transfer charger, an AC separation charger, a post-transfer charger, a cleaner, etc. are arranged around the photosensitive drum 3, although not shown.
【0003】記録用の用紙100は、給紙部4に収納さ
れており、ピックローラ5により所定時機に繰り出され
る。繰り出された用紙100は、給紙手段6及び送りロ
ーラ7によりレジストローラ1に送られる。なお、給紙
手段6は、いずれもゴム製のフィードベルト8とリバー
スローラ9とより成り、繰り出された用紙100を確実
に1枚ずつ搬送する。[0003] Recording paper 100 is stored in a paper feed section 4, and is fed out by a pick roller 5 at a predetermined time. The fed paper 100 is sent to the registration roller 1 by the paper feeding means 6 and the feeding roller 7. Note that the paper feeding means 6 includes a feed belt 8 and a reverse roller 9, both of which are made of rubber, and reliably conveys the fed sheets 100 one by one.
【0004】一方、感光ドラム3は図3の時計方向に回
転し、その表面には次の手順でトナー画像が形成される
。すなわち、感光ドラム3の表面は、まず前帯電器によ
り一様に帯電され、次に光学ユニットにより所定パター
ン(画像情報に対応したパターン)で露光されて静電潜
像が形成される。この静電潜像は現像器により現像され
てトナー像となる。On the other hand, the photosensitive drum 3 rotates clockwise in FIG. 3, and a toner image is formed on its surface in the following steps. That is, the surface of the photosensitive drum 3 is first uniformly charged by a pre-charger, and then exposed to light in a predetermined pattern (a pattern corresponding to image information) by an optical unit to form an electrostatic latent image. This electrostatic latent image is developed by a developing device to become a toner image.
【0005】その後トナー像は転写位置(感光ドラム3
の真下)に進むが、前述のようにレジストローラ1に送
られた用紙は、レジストローラ1と従動ローラ2に当た
りバッファリングして停止(このとき用紙先端がそろえ
られる)した後、感光ドラム3のスピードに合わせて転
写位置に送られ、転写器による該用紙へのトナー像転写
が行われる。AC分離器は、比較的周波数の高い交流高
電圧を用紙に放電し、帯電量を減少させて用紙がドラム
から剥れやすくする働きをする。After that, the toner image is transferred to the transfer position (photosensitive drum 3
However, as mentioned above, the paper sent to the registration roller 1 hits the registration roller 1 and the driven roller 2, buffers and stops (at this time, the leading edge of the paper is aligned), and then the paper is sent to the photosensitive drum 3. The paper is sent to a transfer position according to the speed, and a toner image is transferred onto the paper by a transfer device. The AC separator discharges an alternating current high voltage with a relatively high frequency onto the paper, thereby reducing the amount of charge and making the paper easier to peel off from the drum.
【0006】転写を完了した感光ドラム3の表面は、転
写後除電器により除電され、クリーナにより清掃される
。また、トナー像が転写された用紙は、図示しない定着
器に送られ、ここで定着を完了した後、図示しないスタ
ッカに排出される。After the transfer has been completed, the surface of the photosensitive drum 3 is neutralized by a post-transfer static eliminator and cleaned by a cleaner. Further, the paper onto which the toner image has been transferred is sent to a fixing device (not shown), where fixing is completed, and then the paper is discharged to a stacker (not shown).
【0007】[0007]
【発明が解決しようとする課題】上記のように、給紙部
4から感光ドラム3への用紙搬送機構の途中に設けられ
たレジストローラ1は、用紙先端をそろえる役割を果た
す。しかし、給紙手段6により用紙を搬送する際に、フ
ィードベルト8とリバースローラ9がゴム製のため、用
紙との摩擦によりゴムかすが発生する。これが用紙に付
着した状態で用紙が搬送されると、該ゴムかすはレジス
トローラ1の表面に堆積する。そして、この堆積したゴ
ムかすが用紙表面上に再付着すると、印字かけや転写抜
けが発生し、印字品位が低下する。As described above, the registration roller 1 provided in the middle of the paper transport mechanism from the paper feed section 4 to the photosensitive drum 3 plays the role of aligning the leading edges of the paper. However, since the feed belt 8 and reverse roller 9 are made of rubber, when the paper is conveyed by the paper feeding means 6, rubber scum is generated due to friction with the paper. When the paper is conveyed with this rubber scum attached to the paper, the rubber scum is deposited on the surface of the registration roller 1. When this accumulated rubber scum re-adheres to the surface of the paper, missing prints and transfer omissions occur, resulting in a decrease in print quality.
【0008】本発明は、レジストローラの表面上にゴム
かす等が付着するのを防止して印字品位を向上させるこ
とを可能にするレジストローラの構造を提供することを
目的としている。SUMMARY OF THE INVENTION An object of the present invention is to provide a structure of a registration roller that prevents rubber scum and the like from adhering to the surface of the registration roller and improves printing quality.
【0009】[0009]
【課題を解決するための手段】上述の目的を達成するた
め、本発明では、媒体を搬送する搬送機構に用いられ、
該媒体の先端をそろえる機能を有するレジストローラに
おいて、該レジストローラの中央部分を、その他の部分
より小径としたことを特徴とする構成(第1の構成)と
する。[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a transport mechanism for transporting a medium,
In the registration roller having the function of aligning the leading ends of the media, the configuration (first configuration) is characterized in that the center portion of the registration roller has a smaller diameter than the other portions.
【0010】また、上記レジストローラにおいて、該レ
ジストローラの少なくとも中央部分を鏡面仕上げにした
ことを特徴とする構成(第2の構成)とする。[0010] Furthermore, the registration roller has a configuration (second configuration) characterized in that at least a central portion of the registration roller is mirror-finished.
【0011】[0011]
【作用】第1の構成の場合は、レジストローラは、中央
部分が他の部分より小径となっているため、ゴムかす等
はこの部分をすり抜けてしまう。従って、レジストロー
ラにゴムかす等が付着することはない。また、第2の構
成の場合も、レジストローラの少なくとも中央部分が鏡
面仕上げになっているため、該部分にゴムかす等が付着
することはない。[Operation] In the case of the first configuration, since the center portion of the registration roller has a smaller diameter than the other portions, rubber scum and the like slip through this portion. Therefore, rubber scum and the like will not adhere to the registration rollers. Also in the case of the second configuration, since at least the center portion of the registration roller has a mirror finish, rubber scum and the like will not adhere to this portion.
【0012】0012
【実施例】以下、図1及び図2に関連して本発明の実施
例を説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.
【0013】図1に第1の実施例を示す。FIG. 1 shows a first embodiment.
【0014】図1は本例のレジストローラ11の斜視図
で、該レジストローラ11は、中央部分12が他の部分
より小径となっている。従って、図3に関連して説明し
たようにゴムかす等が付着した状態で用紙がレジストロ
ーラ11に搬送されても、該ゴムかすは、この中央部分
12をすり抜け、レジストローラ11の表面に堆積する
ことはなくなる。従って、従来問題となっていた、堆積
ゴムかすが用紙表面に再付着するのを防止することがで
き、印字かけや転写抜けをなくして印字品位を向上させ
ることが可能になる。なお、中央部分12をすり抜ける
ゴムかすは小量であるので、問題にはならない。FIG. 1 is a perspective view of the registration roller 11 of this example, and the registration roller 11 has a central portion 12 having a smaller diameter than other portions. Therefore, even if the paper is conveyed to the registration rollers 11 with rubber scum or the like attached to it as described in connection with FIG. There will be nothing left to do. Therefore, it is possible to prevent the accumulated rubber scum from re-adhering to the paper surface, which has been a problem in the past, and it is possible to improve printing quality by eliminating missing prints and transfer omissions. Note that the amount of rubber scum that slips through the central portion 12 is small, so it does not pose a problem.
【0015】図2に第2の実施例を示す。FIG. 2 shows a second embodiment.
【0016】図2は本例のレジストローラ21の斜視図
で、該レジストローラ21は、少なくとも中央部分22
に鏡面仕上げが施されている。本図では中央部分のみに
鏡面仕上げを施したものを示しているが、全長にわたり
鏡面仕上げを施しても良い。本例の場合も、レジストロ
ーラ21に達した用紙上のゴムかすは、摩擦の少ない鏡
面仕上げ部分である中央部分22をすり抜けて通過し、
レジストローラ21の表面に堆積することはなく、前例
と同様の効果が得られる。FIG. 2 is a perspective view of the registration roller 21 of this example, and the registration roller 21 has at least a central portion 22.
Has a mirror finish. In this figure, only the central portion is shown with a mirror finish, but the entire length may be mirror finished. In this example as well, the rubber scum on the paper that has reached the registration roller 21 passes through the central portion 22, which is a mirror-finished portion with little friction, and
It is not deposited on the surface of the registration roller 21, and the same effect as the previous example can be obtained.
【0017】[0017]
【発明の効果】以上述べたように、本発明によれば、レ
ジストローラの表面にゴムかす等が堆積して付着するの
を防ぐことができるため、印字かけ,転写抜けをなくし
て印字品位を向上させることが可能になる。[Effects of the Invention] As described above, according to the present invention, it is possible to prevent rubber scum etc. from accumulating and adhering to the surface of the registration roller, thereby eliminating missing prints and transfer omissions and improving print quality. It becomes possible to improve.
【図1】本発明の第1の実施例のレジストローラの斜視
図である。FIG. 1 is a perspective view of a registration roller according to a first embodiment of the present invention.
【図2】本発明の第2の実施例のレジストローラの斜視
図である。FIG. 2 is a perspective view of a registration roller according to a second embodiment of the present invention.
【図3】従来の画像記録装置の概要を示す側面図である
。FIG. 3 is a side view showing an outline of a conventional image recording device.
11,21 レジストローラ 12,22 中央部分 11, 21 Registration roller 12, 22 Central part
Claims (2)
該媒体の先端をそろえる機能を有するレジストローラ(
11)において、前記レジストローラ(11)の中央部
分(12)を、その他の部分より小径としたことを特徴
とするレジストローラの構造。Claim 1: Used in a conveyance mechanism that conveys a medium,
A registration roller (with a function of aligning the leading edge of the medium)
11) The registration roller structure according to item 11, wherein the center portion (12) of the registration roller (11) has a smaller diameter than the other portions.
該媒体の先端をそろえる機能を有するレジストローラ(
21)において、前記レジストローラ(21)の少なく
とも中央部分(22)を鏡面仕上げにしたことを特徴と
するレジストローラの構造。2. Used in a conveyance mechanism that conveys a medium,
A registration roller (with a function of aligning the leading edge of the medium)
21) The structure of the registration roller according to item 21), wherein at least the central portion (22) of the registration roller (21) is mirror-finished.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3117389A JPH04345448A (en) | 1991-05-22 | 1991-05-22 | Structure of resist roller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3117389A JPH04345448A (en) | 1991-05-22 | 1991-05-22 | Structure of resist roller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04345448A true JPH04345448A (en) | 1992-12-01 |
Family
ID=14710444
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3117389A Pending JPH04345448A (en) | 1991-05-22 | 1991-05-22 | Structure of resist roller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04345448A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011219265A (en) * | 2010-04-14 | 2011-11-04 | Canon Inc | Sheet conveyance apparatus and image forming apparatus |
-
1991
- 1991-05-22 JP JP3117389A patent/JPH04345448A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011219265A (en) * | 2010-04-14 | 2011-11-04 | Canon Inc | Sheet conveyance apparatus and image forming apparatus |
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