JPS58187971A - Wrinkle preventing device of image supporting body in contact heating type fixation device - Google Patents
Wrinkle preventing device of image supporting body in contact heating type fixation deviceInfo
- Publication number
- JPS58187971A JPS58187971A JP7035382A JP7035382A JPS58187971A JP S58187971 A JPS58187971 A JP S58187971A JP 7035382 A JP7035382 A JP 7035382A JP 7035382 A JP7035382 A JP 7035382A JP S58187971 A JPS58187971 A JP S58187971A
- Authority
- JP
- Japan
- Prior art keywords
- transfer paper
- guide member
- fixation
- heating
- roll
- 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
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2017—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means
- G03G15/2028—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means with means for handling the copy material in the fixing nip, e.g. introduction guides, stripping means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
- Fixing For Electrophotography (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、密着加熱型定着装置における画倫支持体のシ
ワ防止装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wrinkle prevention device for a support in a contact heating type fixing device.
一般に、電子写真複写装置においては、画偉支持体とし
て普通紙が用いられることが多く、このため、シワの発
生という問題を有する。すなわち、賛通このような支持
体はカセットに収納して装置に装填するが、吸湿性であ
シ、かつ薄手であるので湿度に影響されやすく、先端部
の幅方向に波状の凹凸ができるのは、よく見られる現象
である。Generally, in electrophotographic copying machines, plain paper is often used as the image support, which causes the problem of wrinkles. In other words, such a support is stored in a cassette and loaded into the device, but because it is hygroscopic, thick, and thin, it is easily affected by humidity, and wavy irregularities can form in the width direction of the tip. is a commonly observed phenomenon.
また、一般に転写後の支持体を定着装置まで搬送させる
手段として、間隔をもって配置した複数本の回転ベルト
を用い、支持体を吸いつ−けながら搬送するものであり
、これによっても凹凸を生ずるものである。このような
幅方向に波状の凹凸がある支持体をそのまま密着加熱型
定着装置に挿入させると、通過した支持体の長手方向に
シワを生じやすく、画質を損ねることにもなるものであ
る。Furthermore, as a means of transporting the support after transfer to the fixing device, a plurality of rotating belts arranged at intervals are generally used to convey the support while sucking the support, which also causes unevenness. It is. If such a support having wave-like irregularities in the width direction is inserted into a contact heating type fixing device as it is, wrinkles are likely to occur in the longitudinal direction of the support passing through, which may impair image quality.
そこで、従来は装置と支持体（転写紙）との両面から、
このようなシワの発生を軽減すべく対策が種々講じられ
ている。た、とえば、第１図に示すように加熱定着ロー
ラ（１）と圧着ローラ（２）とのいずれか一方のローラ
表面との間にガイド部材（３）によりスリット（４）を
形成し、このスリット（４）を通して転写紙（５）を両
ローラ（１）（２）の接触点に導くようにしたものが特
公昭５３−３５７３１号公報によシ提案されている。こ
れによれば、転写紙（５）は一旦加熱定着ローラ（１）
に当たり、ある程度その先端が揃えられ、先端がローラ
（１） （２）間てニップされると、この転写紙（５）
がガイド部材（３）先端に当たるので、転写紙（５）は
平面に近い形で定着部に進入することとなってシワの発
生が軽減される。ところが、高温高湿条件下で先端がカ
ールしたり波うった転写紙（５）が搬送されると、この
転写紙（５）がスリット（４）を通過できず、定着部前
で止まってしまうという欠点を有する。また、先端が波
打ちした転写紙（５）は平面にすることができない。Therefore, conventionally, from both the device and the support (transfer paper),
Various measures have been taken to reduce the occurrence of such wrinkles. For example, as shown in FIG. 1, a slit (4) is formed by a guide member (3) between the surface of one of the heat fixing roller (1) and the pressure roller (2); Japanese Patent Publication No. 53-35731 proposes a method in which the transfer paper (5) is guided through the slit (4) to the point of contact between the rollers (1) and (2). According to this, the transfer paper (5) is first transferred to the heat fixing roller (1).
When the edges of the transfer paper (5) are aligned to some extent and nipped between the rollers (1) and (2), the transfer paper (5)
Since the transfer paper (5) hits the tip of the guide member (3), the transfer paper (5) enters the fixing section in a nearly flat form, thereby reducing the occurrence of wrinkles. However, when a transfer paper (5) with a curled or wavy leading edge is conveyed under high temperature and high humidity conditions, the transfer paper (5) cannot pass through the slit (4) and stops in front of the fixing unit. It has the following drawback. Further, the transfer paper (5) with a corrugated leading edge cannot be made flat.
さらに、他の手段として加熱定着ローラの中央部外径を
端部外径よりも数１０μ小さくしたもの、特公昭５５−
３４４３０号公報に示されるように中央部が最大径で両
端部が最小径と力るような略鼓形状の金属コアに弾性を
有する材料の被覆層を外径が同一径となるように被覆し
てなる加熱定着ローラを用いたもの、特公昭５５−４７
３８５号公報に示されルヨウにプレスパートサクション
ロールの真空度などをＦ・１整して密度０．６５〜０．
７２？／−の用紙を用いるようにしたもの等がある。こ
れらの手段によれば、第１図に示したものと同様、常温
常湿条件下（２０℃、６０％）ではある程度シワの発生
を低減できるが、転写紙の種類が変わったシ、高温高湿
条件下であったり、複写速度が高速化されたような場合
、再びシワを発生してしまうことになる。Furthermore, as another means, the outer diameter of the center part of the heating fixing roller is several tens of microns smaller than the outer diameter of the end part.
As shown in Japanese Patent No. 34430, a substantially drum-shaped metal core with a maximum diameter at the center and a minimum diameter at both ends is coated with a coating layer of an elastic material so that the outer diameters are the same. Using a heating fixing roller made of
As shown in Japanese Patent No. 385, the vacuum degree of the press part suction roll was adjusted to F.1 and the density was 0.65 to 0.
72? There are some that use /- paper. According to these methods, as shown in Figure 1, wrinkles can be reduced to some extent under normal temperature and normal humidity conditions (20°C, 60%), but when the type of transfer paper is changed or when Under humid conditions or when the copying speed is increased, wrinkles will occur again.
結局、これらの従来技術は、環境、転写紙の種類、複写
速度等の諸条件がシワに対し有利であるときにその効果
がある程度期待できるものでしかなく、これらの諸条件
が悪い場合には殆んど効果のない消極的な対策手段とい
える。After all, these conventional techniques can only be expected to be effective to a certain extent when various conditions such as the environment, type of transfer paper, copying speed, etc. are favorable for wrinkles, and when these conditions are unfavorable, This can be said to be a passive countermeasure with little effect.
本発明は、このような点に鑑みなされたもので、環境、
転写紙の種類、複写速度等の諸条件が不利な場合であっ
てもシワの発生を低減することができる密着加熱型定着
装置における画備支持体のシワ防止装置を提供すること
を目的とするものである。The present invention was made in view of these points, and it
An object of the present invention is to provide a wrinkle prevention device for an image support in a contact heating type fixing device, which can reduce the occurrence of wrinkles even when various conditions such as the type of transfer paper and copying speed are unfavorable. It is something.
本発明は、支持体入口側に位置して先端を加熱定着ロー
ラに密着させつつ加熱定着ローラに沿って湾曲させたば
ね性を有するガイド部材を設けることにより、支持体は
加熱定着ローラ・ガイド部材先端間に入り込み加熱定着
ローラによる搬送力を受けつつガイド部材のばね性によ
り押圧されて強制的に平面状となって搬送されるので、
諸条件による影響を特に受けることなくシワの発生を防
止することができ、かつ、定着性を向上させることがで
きるように構成したものである。In the present invention, by providing a guide member having spring properties that is located on the inlet side of the support and whose tip is in close contact with the heat-fixing roller and curved along the heat-fixing roller, the support can be connected to the heat-fixing roller and the tip of the guide member. The image is conveyed in a flat shape by being pressed by the spring properties of the guide member while receiving the conveying force from the heating and fixing roller.
The structure is such that it is possible to prevent wrinkles from occurring without being particularly affected by various conditions, and to improve fixing performance.
本発明の一実施例を第２Ｖに基づいて説明する。An embodiment of the present invention will be described based on Section 2V.
まず、ヒータ（６）が内蔵された加熱定着ローラ（７）
と圧着ローラ（８）とが対向接触しつつ矢印方向に回転
するように設けられている。そして、両ローラ（７）（
８）に対する支持体としての転写紙（９）の入口側には
この転写紙（９）の進行をガイドするガイド部材０Ｑが
設けられている。このガイド部材叫はばね性を有する耐
熱性材料、たとえば、マイラーであり、その先端（１０
４）は加熱定着ローラ（７）にニップ直前位置にて線接
触状態で密着し、かつ、加熱定着ローラ（７）に沿って
湾曲（すなわち、下向きに凸状）されている。First, a heating fixing roller (7) with a built-in heater (6)
and a pressure roller (8) are provided so as to rotate in the direction of the arrow while facing each other and in contact with each other. And both rollers (7) (
A guide member 0Q for guiding the progress of the transfer paper (9) is provided on the entrance side of the transfer paper (9) serving as a support for the transfer paper (9). This guide member is made of a heat-resistant material with spring properties, such as mylar, and its tip (10
4) is in close contact with the heat fixing roller (7) in a line contact state at a position immediately before the nip, and is curved (that is, downwardly convex) along the heat fixing roller (7).
このような構成において、転写済みでトプーー像を上面
Ｖこホする転写紙（９）は図示しない搬送機構により進
行し、ガイド部材α１に沿って加熱定着ローラ（７）へ
向かう。このとき、ガイド部材αＱは下向きに湾曲して
いるので、このガイド部材αＱによｐガイドされる転写
紙（９）はその形状に従いある程度塵をつけられた形で
加熱定着ローラ（７）へ突き当たる。In such a configuration, the transfer paper (9) having the transferred Topoo image on its upper surface is advanced by a transport mechanism (not shown), and is directed toward the heat fixing roller (7) along the guide member α1. At this time, since the guide member αQ is curved downward, the transfer paper (9) guided by the guide member αQ hits the heat fixing roller (7) with some dust attached according to its shape. .
このようにして、転写紙（９）の先端が加熱定着ローラ
（７）・先端（１０ａ）間に進行すると、この先端を少
し押し広げて両者間に入り込む。そして、転写紙（９）
の進行が進み両ローラ（７） （８）間にニップされる
ことになるが、その過程において転写紙（９）は加熱定
着ローラ（７）によシ搬送力を受けつつ密着させたガイ
ド部材αＱの先端（１０α）によりそのばね性に基づく
押圧力を受けることになる。この押圧力により転写紙（
９）は加熱定着ローラ（７）・圧着ローラ（８）間に進
行する直前に強制的に押し広げられ平面状となるので、
定着部を通過してもシワの発生は極めて少ないものとな
る。また、ガイド部材α１に沿って進行する転写紙（９
）をみると、このガイド部材０１が湾曲形状であり先端
（１０ａ）に向けて加熱定着ローラ（７）とガイド部材
α１との間隔が徐々に狭められているので、カールした
転写紙（９）であってもそのカールがある程度矯正され
、かつ、ガイド部材α０も加熱定着ローラ（７）からの
熱を受けて暖まっているので、定着性も一層向上するも
のである。In this way, when the leading edge of the transfer paper (9) advances between the heating fixing roller (7) and the leading edge (10a), the leading edge is slightly pushed apart and enters between them. And transfer paper (9)
The transfer paper (9) advances and is nipped between the rollers (7) and (8), but in the process, the transfer paper (9) is subjected to the conveyance force by the heating and fixing roller (7) while the guide member that is brought into close contact with the transfer paper (9) The tip (10α) of αQ receives a pressing force based on its springiness. This pressing force causes the transfer paper (
9) is forcibly spread out and becomes flat just before it advances between the heat fixing roller (7) and the pressure roller (8).
Even after passing through the fixing section, there are very few wrinkles. In addition, the transfer paper (9) advancing along the guide member α1
), this guide member 01 has a curved shape and the distance between the heat fixing roller (7) and the guide member α1 gradually narrows toward the tip (10a), so the curled transfer paper (9) Even so, the curl is corrected to some extent, and the guide member α0 is also warmed by the heat from the heating fixing roller (7), so that the fixing performance is further improved.
ちなみに、両面コピー通紙テストを行なったところ、ガ
イ゛ド部材α１がない場合には５００枚当た９９８枚に
つきシワが発生したものであるが、第２図方式では５枚
程度という良好な結果が得られたものである。By the way, when we conducted a double-sided copy sheet feeding test, we found that without the guide member α1, wrinkles occurred on every 998 out of 500 sheets, but with the method shown in Figure 2, wrinkles appeared on only 5 sheets, which was a good result. is what was obtained.
本発明は、上述したように支持体入口側に位置して先端
を加熱定着ローラに密着させつつこの加熱定着ローラに
沿って湾曲させたばね性を有するガイド部材を設けたの
で、支持体を定着部に至る直前においてばね性に基づく
ガイド部材の押圧力により強制的に平面状とすることが
でき、よって、諸条件による影響を受けることなくシワ
の発生を極力抑えることができ、また、ガイド部材の湾
曲形状に基づきカールも補正することができ、より一層
信頼性を向上させ、良好なる定着動作を行なわせること
ができるものである。In the present invention, as described above, a guide member having spring properties is provided, which is located on the inlet side of the support and whose tip is in close contact with the heat-fixing roller and curved along the heat-fixing roller. Immediately before the guide member reaches the flat shape, it can be forcibly made into a flat shape by the pressing force of the guide member based on its spring properties. Curling can also be corrected based on the curved shape, and reliability can be further improved and a good fixing operation can be performed.
第１図は従来例を示す側面図、第２図は本発明の一実施
例を示す側面図である。
７・・・加熱定着ローラ、８・・・圧着ローラ、９・・
・転写紙（支持体）、１ｏ・・・ガイド部材、１０ａ・
・・先端量 願 人 株式会社リコー
課
ｕ 、！
九
ユ
あＺし
６ｒ′７ｑ
／
丈
：
）
）
八
０
１０（１FIG. 1 is a side view showing a conventional example, and FIG. 2 is a side view showing an embodiment of the present invention. 7... Heat fixing roller, 8... Pressure roller, 9...
・Transfer paper (support), 1o...guide member, 10a・
・・Tip quantity request person Ricoh Co., Ltd. Division u,! 9 Yua Zshi 6r'7q / Length: ) ) 80 10 (1
Claims (1)
転する圧着ローラとの間にトナー像を有する支持体を挿
入させてこのトナー像を順次支持体上に加熱定着させる
密着加熱型定着装置において、前記両ローラの支持体入
口側に位置して先端を前記加熱定着ローラに密着させつ
つこの加熱定着ローラに沿って湾曲させたばね性を有す
るガイド部材を設けたことを特徴とする密着加熱型定着
装置における画偉支持体のシワ防止装置。In the contact heating type fixing device, a support having a toner image is inserted between a heat fixing roller and a pressure roller that rotates while being in pressure contact with the heat fixing roller, and the toner images are sequentially heat-fixed onto the support. A contact heating type fixing device, characterized in that a guide member having a spring property is provided, which is located on the support inlet side of both rollers, and has a tip thereof in close contact with the heating fixing roller, and is curved along the heating fixing roller. Wrinkle prevention device for the support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7035382A JPS58187971A (en) | 1982-04-28 | 1982-04-28 | Wrinkle preventing device of image supporting body in contact heating type fixation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7035382A JPS58187971A (en) | 1982-04-28 | 1982-04-28 | Wrinkle preventing device of image supporting body in contact heating type fixation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58187971A true JPS58187971A (en) | 1983-11-02 |
Family
ID=13428976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7035382A Pending JPS58187971A (en) | 1982-04-28 | 1982-04-28 | Wrinkle preventing device of image supporting body in contact heating type fixation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58187971A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6125256A (en) * | 1998-10-07 | 2000-09-26 | Xerox Corporation | Apparatus and method for reducing media wrinkling in an imaging apparatus |
-
1982
- 1982-04-28 JP JP7035382A patent/JPS58187971A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6125256A (en) * | 1998-10-07 | 2000-09-26 | Xerox Corporation | Apparatus and method for reducing media wrinkling in an imaging apparatus |
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