JPH0442283A - Wave-shaped deformation proof device for fixation recording sheet - Google Patents

Wave-shaped deformation proof device for fixation recording sheet

Info

Publication number
JPH0442283A
JPH0442283A JP2151299A JP15129990A JPH0442283A JP H0442283 A JPH0442283 A JP H0442283A JP 2151299 A JP2151299 A JP 2151299A JP 15129990 A JP15129990 A JP 15129990A JP H0442283 A JPH0442283 A JP H0442283A
Authority
JP
Japan
Prior art keywords
recording paper
heat roller
recording sheet
heat
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
Application number
JP2151299A
Other languages
Japanese (ja)
Inventor
Masahiro Kita
喜多 正浩
Tomoyuki Nishikawa
知幸 西川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pentax Corp
Original Assignee
Asahi Kogaku Kogyo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asahi Kogaku Kogyo Co Ltd filed Critical Asahi Kogaku Kogyo Co Ltd
Priority to JP2151299A priority Critical patent/JPH0442283A/en
Publication of JPH0442283A publication Critical patent/JPH0442283A/en
Pending legal-status Critical Current

Links

Landscapes

  • Fixing For Electrophotography (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)

Abstract

PURPOSE:To prevent wave-shaped deformation from being generated by bending the discharging path of a recording sheet, which is fed out of a heat roll fixing device, to the side of a heat roller by a guide member. CONSTITUTION:On the discharging side of a heat roll fixing device 10, a guide member 30 is provided to bend the conveying path of a fixed recording sheet 20 to the side of arranging a heat roller 11. By holding the recording sheet 20 fed out of paired fixing rolls 10 on the upper face of a rib 33 of the guide member 30 and bending the discharging path to the side of the heat roller 11, the position of peeling off the recording sheet 20 from the heat roller 11 and at any part of the recording sheet 20, there is no difference of heating time by the heat roller 11. Thus, the wave-shaped deformation can be prevented from being generated.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、電子写真法を利用する画像形成装置に用いら
れるヒートロール定着装置による記録紙の変形を防止す
る定着記録紙の波状変形防止構造に関する。
Detailed Description of the Invention [Industrial Application Field] The present invention relates to a structure for preventing wavy deformation of a fixed recording paper, which prevents the recording paper from being deformed by a heat roll fixing device used in an image forming apparatus using electrophotography. Regarding.

[従来の技術] 従来、感光ドラム表面の感光体を露光して潜像を形成し
、この潜像にトナーを付着させて現像(トナー像化)し
、このトナー像を記録用紙に転写すると共に定着装置に
よって定着させる所謂電子写真法を利用する画像形成装
置として、複写機やプリンタか知られている。
[Prior Art] Conventionally, a photoconductor on the surface of a photoconductor drum is exposed to light to form a latent image, toner is attached to this latent image to develop it (toner image), and this toner image is transferred to recording paper. Copying machines and printers are known as image forming apparatuses that utilize so-called electrophotography to fix images using a fixing device.

このような、電子写真法を利用する画像形成装置に於て
は、定着装置として、加熱されたローラ(ヒートローラ
)に未定着のトナー像か転写された記録紙を押圧し、該
ヒートローラから加えられる熱てトナーを加熱融着させ
る所謂ヒートロール定着装置を用いるのか一般的である
In such an image forming apparatus that uses electrophotography, the fixing device is a heated roller (heat roller) that presses the recording paper onto which the unfixed toner image has been transferred, and then presses the recording paper onto which the unfixed toner image has been transferred. It is common to use a so-called heat roll fixing device that heats and fuses the toner with applied heat.

ヒートロール定着装置は、高温に加熱されると−1ヘロ
ーラとプレスローラな平行に設置して定着ローラ対を構
成し、この定着ローラ対の間に記録紙を挟むことによっ
て記録紙をピー1ヘローラに押圧して加熱するものてあ
り、熱効率が高く高速化か可能という優れた利点を有す
るものである。
When the heat roll fixing device is heated to a high temperature, the -1 roller and press roller are installed in parallel to form a fixing roller pair, and by sandwiching the recording paper between the fixing roller pair, the recording paper is transferred to the P1 roller. It is a device that heats the device by pressing it on the surface, and has the excellent advantages of high thermal efficiency and high speed operation.

通常は、ヒートローラか回転駆動され、該ヒートローラ
にプレスローラか従動するようになっており、両ローラ
の間に挟まれた記録紙の搬送駆動も兼ねるようになって
いる。
Usually, a heat roller is rotationally driven, and a press roller follows the heat roller, and also serves to drive the conveyance of the recording paper sandwiched between the two rollers.

[従来技術の課題] しかし乍ら、前述の如きヒートロール定着装置では、熱
圧プレスされることによって定着後の記録紙に波状の変
形が生ずることがある。このような変形は記録紙か冷却
した後も復帰せず、極めて見苦しいという問題かあった
。この波状の変形は、特に湿気を帯びた記録紙に於て著
しい。
[Problems with the Prior Art] However, in the heat roll fixing device as described above, wavy deformation may occur in the recording paper after fixing due to hot pressure pressing. This deformation did not recover even after the recording paper was cooled, and there was a problem that it was extremely unsightly. This wavy deformation is particularly noticeable on humid recording paper.

[発明の目的コ 本発明は、上記の如き事情に鑑み、ピー1−ロール定着
装置による記録紙の波状変形を防止することのできる、
定着記録紙の波状変形防止構造の提供、を目的とする。
[Object of the Invention] In view of the above-mentioned circumstances, the present invention provides a method for preventing wavy deformation of recording paper caused by a one-roll fixing device.
The purpose of the present invention is to provide a structure for preventing wavy deformation of fixing recording paper.

[課題を解決する為の手段] 上記目的達成の為、本出願人は、ピー1〜ロール定着装
置による記録紙の波状変形は記録紙のヒートローラから
の剥離位置が一定しないことに起因する部位による加熱
時間の差異によって生ずることを突止め、この記録紙の
ヒートローラからの剥離位置を一定化することにより波
状変形を防止可能とする本発明を達成したものである。
[Means for Solving the Problems] In order to achieve the above object, the applicant has proposed that the wavy deformation of the recording paper caused by the P1-roll fixing device is caused by the uneven peeling position of the recording paper from the heat roller. The present invention has been achieved in which it is possible to prevent wavy deformation by identifying the problem caused by differences in heating time and by making the peeling position of the recording paper constant from the heat roller.

即ち、本発明に係る定着記録紙の波状変形防止構造は、
ヒートロール定着装置の排紙側に、定着後の記録紙の搬
送経路をヒートローラ配置側に屈曲させるガイド部材を
設けて構成したものである。
That is, the structure for preventing wavy deformation of the fixing recording paper according to the present invention is as follows:
A guide member is provided on the paper discharge side of the heat roll fixing device to bend the conveyance path of the recording paper after fixing toward the heat roller arrangement side.

[発明の実施例] 第1図は、本発明に係る定着記録紙の波状変形防止構造
の一実施例を備えたヒートロール定着装置の断面図であ
る。
[Embodiments of the Invention] FIG. 1 is a cross-sectional view of a heat roll fixing device equipped with an embodiment of a structure for preventing wavy deformation of a fixing recording paper according to the present invention.

図示定着装置は、ヒートローラ11とプレスローラ12
とを上下に隣接配置した定着ロール対10を、図中矢印
て示ず記録紙20の幅方向に配置して構成されている。
The illustrated fixing device includes a heat roller 11 and a press roller 12.
A pair of fixing rolls 10 in which the fixing rolls 10 and 10 are vertically adjacent to each other are arranged in the width direction of the recording paper 20 (not shown by arrows in the figure).

上側のビー1〜ローラ11は、円筒状のローラてあって
その内部にハロゲンランプ等の発熱体か挿置されおり、
該発熱体によって所定の温度に加熱されるようになって
いる。その両端は、図示しない当該定着装置のシャーシ
によって保持されると共に、一方何端に固定された図示
しないキアを介して回転駆動されるようになっているも
のである。
The upper bee 1 to roller 11 are cylindrical rollers in which a heating element such as a halogen lamp is inserted.
It is heated to a predetermined temperature by the heating element. Both ends thereof are held by a chassis (not shown) of the fixing device, and are rotatably driven via a gear (not shown) fixed to one end.

下側のプレスローラ12は、表面を所定硬度のシリコン
ゴム等て所定厚さにゴム引きしたローラであり、その両
端でシャーシに回転自在に保持されると共に、図示しな
いスプリンタによってヒートローラ11に所定の圧力て
押圧付勢されて設置されている。
The lower press roller 12 is a roller whose surface is rubberized to a predetermined thickness with silicone rubber or the like having a predetermined hardness, and is rotatably held by the chassis at both ends, and is attached to the heat roller 11 by a splinter (not shown). It is installed and pressed with a predetermined pressure.

プレスローラ12の排紙側には、ガイド部材としての排
紙ガイド30か設けられている。
A paper discharge guide 30 as a guide member is provided on the paper discharge side of the press roller 12.

排紙ガイド30は、ベース部31を定着ロール対10と
平行として、ベース部31から垂下された取付部34を
介してシャーシ40に固定されている。
The paper ejection guide 30 is fixed to the chassis 40 via a mounting part 34 hanging down from the base part 31, with the base part 31 being parallel to the pair of fixing rolls 10.

ベース部31の上面側には、その長平方向に複数の三角
形状のリフ32.33か平行に立設形成されている。
On the upper surface side of the base portion 31, a plurality of triangular ridges 32, 33 are formed in parallel in the elongated direction.

リフ32.33は、ベース部31の長平方向に等間隔て
形成され、背の低いリフ32に対して背の高いリブ33
か、少なくとも記録紙20の幅方向の中心から同間隔の
位置二箇所に配設されている。
The ridges 32 and 33 are formed at equal intervals in the longitudinal direction of the base portion 31, and the ridges 32 and 33 are taller than the ridges 32 which are short.
Or, at least, they are arranged at two positions at the same distance from the center of the recording paper 20 in the width direction.

リフ33は、その定着ロール対10と対向する側の端面
と上面とて形成される角の位置か、ヒートローラ11と
プレスローラ12の当接位置と略水平となる位置てあり
、又、上面は定着ロール対lOから離れるに従って所定
の角度(本実施例ては206)て上方(ヒートローラ1
1側)に向かう傾斜面となっている。
The rift 33 is located at a corner formed by the end surface and the upper surface on the side facing the pair of fixing rolls 10, or at a position substantially horizontal to the contact position between the heat roller 11 and the press roller 12, and at the upper surface. As it moves away from the fixing roll pair IO, it moves upward at a predetermined angle (206 in this example) (heat roller
1 side).

ヒートローラ11の排紙側には、シャフト15か該ヒー
トローラ11と平行に配置されており、該シャツ1〜1
5に二個のジャム防止爪16がリフ33と食違う位置に
装着されている。
A shaft 15 is arranged parallel to the heat roller 11 on the paper discharge side of the heat roller 11, and the shaft 15 is arranged parallel to the heat roller 11.
Two jam prevention claws 16 are attached to the ridge 5 at different positions from the rift 33.

該シ、Vム防止爪16は、先端が鋭角に形成されており
、シャツl−15に対して所定角度範囲相対回動可能に
装着されると共に、図示しないシャフト15に巻回装着
されたスプリンタの復帰力でその先端かヒートローラ1
1と当接する方向(図中反時計回り)に回動付勢されて
装着されており、何らかの原因て記録紙20かヒートロ
ーラ11に接着して良好に剥かはかれないような場合に
は、その先端てヒートローラ11から記録紙20を剥が
ずように作用するものである。
The tip of the cam prevention claw 16 is formed at an acute angle, and is attached to the shirt l-15 so as to be relatively rotatable within a predetermined angle range. Due to the returning force of the printer, the tip of the heat roller 1
1 (counterclockwise in the figure), and if for some reason it adheres to the recording paper 20 or the heat roller 11 and cannot be peeled off properly, The tip acts to prevent the recording paper 20 from being peeled off from the heat roller 11.

尚、ジャム防止爪16とリフ33とは前述の如く食違う
位置に配置されており、両者の間に記録紙20か挟まれ
てその搬送か阻害されることはないようになっているも
のである。
Note that the jam prevention claw 16 and the rift 33 are arranged at different positions as described above, so that the recording paper 20 will not be caught between them and the conveyance of the paper 20 will not be obstructed. be.

而して、上記の如く構成された定着装置ては、定着ロー
ル対10により熱圧プレスされて定着作用を終了し、ヒ
ートローラ11の回転によって送り出された記録紙20
は、リフ33の−に面に規制されて排紙されることとな
る。
In the fixing device configured as described above, the recording paper 20 is heated and pressed by the pair of fixing rolls 10 to complete the fixing action, and the recording paper 20 is sent out by the rotation of the heat roller 11.
The paper is ejected while being restricted to the negative side of the rift 33.

リフ33の上面は、前述の如く」三方に向かう傾斜面と
なっており、従って、記録紙20の排紙経路は、定着ロ
ール対10の上側のピー1〜ローラ11側に僅かに屈曲
されることになり、これによって記録紙20のヒートロ
ーラ11からの剥離に記録紙20の自重が作用すること
がなく、剥離位置が一定化するものである。その結果、
記録紙20のとの部位てもヒートローラ11による加熱
時間に差か生ずることはなく、波状変形を防止すること
かてきるものである。
As described above, the upper surface of the rift 33 is an inclined surface facing in three directions, and therefore, the paper ejection path of the recording paper 20 is slightly bent toward the P1 to roller 11 side above the pair of fixing rolls 10. As a result, the weight of the recording paper 20 does not act on the separation of the recording paper 20 from the heat roller 11, and the separation position becomes constant. the result,
There is no difference in heating time by the heat roller 11 between the two portions of the recording paper 20, and wavy deformation can be prevented.

つまり、リフ33によって排紙経路を規制しない場合に
は、定着ロール対lOから送り出された記録紙20は、
その自重によって水平より下側に自由状態で垂れ下って
排紙されることとなる為、1ヘナーの粘着力等の極微妙
な条件の変化によってヒートローラ11からの剥離位置
か変化し、この剥離位置の変化によって記録紙20の部
位によってヒートローラ11による加熱時間に差を生じ
、この加熱時間の差によって波状変形を生ずるものであ
る。これに対して、本実施例では定着ロール対10から
送り出された記録紙20をリフ33の上面て保持してそ
の排紙経路をヒートローラ11側にJji’、曲するこ
とにより、記録紙20のヒートローラ11からの剥離位
置を一定化することかてき、記録紙20のとの部位ても
ヒートローラ11による加熱時間か差かなく、従って、
波状変形を生しないものである。
In other words, when the paper ejection path is not regulated by the rift 33, the recording paper 20 fed out from the fixing roll pair IO is
Due to its own weight, the paper hangs down below the horizontal and is discharged. Therefore, due to extremely delicate changes in conditions such as the adhesive strength of 1 henna, the peeling position from the heat roller 11 changes, and this peeling Due to the change in position, the heating time by the heat roller 11 varies depending on the portion of the recording paper 20, and this difference in heating time causes wavy deformation. On the other hand, in this embodiment, the recording paper 20 sent out from the pair of fixing rolls 10 is held on the upper surface of the rift 33 and the paper ejection path is bent toward the heat roller 11 side. The peeling position from the heat roller 11 is made constant, and there is no difference in the heating time by the heat roller 11 between the two parts of the recording paper 20. Therefore,
It does not cause wavy deformation.

[発明の効果] 以」二連ぺたように、本発明に係る定着記録紙の波状変
形防止構造によれは、ヒートロル定着装置から送り出さ
れた記録紙の排紙経路をガイド部材によってヒートロー
ラ側に屈曲することにより、記録紙のヒートローラから
の剥離位置を一定化することかてき、これによって記録
紙へのヒートローラによる加熱時間の差をなくし、波状
変形の発生を防止てきるものである。
[Effects of the Invention] As described above, the structure for preventing wavy deformation of the fixing recording paper according to the present invention allows the ejection path of the recording paper sent out from the heat roll fixing device to be directed toward the heat roller side by the guide member. By bending, the peeling position of the recording paper from the heat roller can be made constant, thereby eliminating the difference in the heating time of the recording paper by the heat roller, and preventing the occurrence of wavy deformation.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明に係る定着記録紙の波状変形防止構造の
一実施例を備えたピー1〜ロール定着装置の断面図であ
る。 第1図 10・・・定着ロール対 (ヒーl〜ロール定着装置) 11・・・ヒートローラ 12・・・プレスローラ 30・・・排紙ガイド(ガイド部材)
FIG. 1 is a cross-sectional view of a P1-roll fixing device equipped with an embodiment of a structure for preventing wavy deformation of a fixing recording paper according to the present invention. Fig. 1 10... Fixing roll pair (heel to roll fixing device) 11... Heat roller 12... Press roller 30... Paper discharge guide (guide member)

Claims (1)

【特許請求の範囲】[Claims] ヒートロール定着装置の排紙側に、定着後の記録紙の搬
送経路をヒートローラ配置側に屈曲させるガイド部材を
設けたこと、を特徴とする定着記録紙の波状変形防止構
造。
A structure for preventing wavy deformation of fixed recording paper, characterized in that a guide member is provided on the paper discharge side of the heat roll fixing device to bend the conveyance path of the recording paper after fixing toward the heat roller arrangement side.
JP2151299A 1990-06-08 1990-06-08 Wave-shaped deformation proof device for fixation recording sheet Pending JPH0442283A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2151299A JPH0442283A (en) 1990-06-08 1990-06-08 Wave-shaped deformation proof device for fixation recording sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2151299A JPH0442283A (en) 1990-06-08 1990-06-08 Wave-shaped deformation proof device for fixation recording sheet

Publications (1)

Publication Number Publication Date
JPH0442283A true JPH0442283A (en) 1992-02-12

Family

ID=15515650

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2151299A Pending JPH0442283A (en) 1990-06-08 1990-06-08 Wave-shaped deformation proof device for fixation recording sheet

Country Status (1)

Country Link
JP (1) JPH0442283A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05208773A (en) * 1992-01-31 1993-08-20 Canon Inc Discharge paper sheet conveying device
JP2017072798A (en) * 2015-10-09 2017-04-13 京セラドキュメントソリューションズ株式会社 Image forming apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05208773A (en) * 1992-01-31 1993-08-20 Canon Inc Discharge paper sheet conveying device
JP2017072798A (en) * 2015-10-09 2017-04-13 京セラドキュメントソリューションズ株式会社 Image forming apparatus

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