JPH0318186B2 - - Google Patents
Info
- Publication number
- JPH0318186B2 JPH0318186B2 JP59158460A JP15846084A JPH0318186B2 JP H0318186 B2 JPH0318186 B2 JP H0318186B2 JP 59158460 A JP59158460 A JP 59158460A JP 15846084 A JP15846084 A JP 15846084A JP H0318186 B2 JPH0318186 B2 JP H0318186B2
- Authority
- JP
- Japan
- Prior art keywords
- recording paper
- conveyance
- fixing device
- paper
- fixing
- 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.)
- Expired - Lifetime
Links
- 238000000926 separation method Methods 0.000 description 13
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 206010067482 No adverse event Diseases 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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)
- Fixing For Electrophotography (AREA)
- Paper Feeding For Electrophotography (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、記録紙を定着装置に搬送する搬送経
路に改良を行なつた、電子写真複写機等の複写機
における記録紙案内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 recording paper guide device in a copying machine such as an electrophotographic copying machine, which has an improved transport path for transporting recording paper to a fixing device. It is.
電子写真複写機にあつては、ドラム周面に設け
た像担持体上に形成されたトナー像を記録紙上に
転写し、転写を受けた記録紙は分離手段によつて
ドラム周面から分離し、定着装置に搬送・定着さ
れたのち機外に排出される。
In an electrophotographic copying machine, a toner image formed on an image bearing member provided on the circumferential surface of a drum is transferred onto recording paper, and the transferred recording paper is separated from the circumferential surface of the drum by a separating means. , the image is transported and fixed by the fixing device, and then ejected from the machine.
定着装置はヒータを内蔵し別に設けた動力源に
よつて駆動される定着ローラと、該定着ローラに
対して下方より圧接し従動回転する圧着ローラと
の上下一対のローラから成つていて、感光ドラム
の軸心に対して定着装置の一対のローラが形成す
る圧接部（ニツプ部）の長手方向が平行になるよ
う配置されている。 The fixing device consists of a pair of upper and lower rollers: a fixing roller that has a built-in heater and is driven by a separate power source, and a pressure roller that comes into pressure contact with the fixing roller from below and rotates as a result. The fixing device is arranged such that the longitudinal direction of the pressure contact portion (nip portion) formed by the pair of rollers of the fixing device is parallel to the axis of the drum.
複写機本体の小型化及び装置の簡略化の観点か
ら記録紙を感光ドラムに密着させトナー像を記録
紙上に転写させたのち、その記録紙を感光ドラム
から剥離するが、その分離手段として記録紙の進
行方向に対して片側のみに例えば分離ベルトを用
いた分離手段を設けることがある。例えば特開昭
59−61862号公報に例示されている分離手段が之
に相当するもので、感光ドラムの周上の片側の分
離側画像欠け部に付勢された分離ベルトを設け之
によつて記録紙を感光ドラムから分離するもので
ある。 From the viewpoint of downsizing the copying machine body and simplifying the device, the recording paper is brought into close contact with the photosensitive drum and the toner image is transferred onto the recording paper, and then the recording paper is peeled off from the photosensitive drum. For example, a separation means using a separation belt may be provided only on one side with respect to the traveling direction of the object. For example, Tokukai Akira
The separating means exemplified in Japanese Patent Application No. 59-61862 corresponds to this, and a separating belt is provided which is energized at the image missing part on the separation side on one side on the circumference of the photosensitive drum, thereby exposing the recording paper to the photosensitive drum. It is separated from the drum.
このようにして感光ドラムから分離した記録紙
は搬送されて前記の定着装置に搬入されるが、こ
の過程では記録紙上には静電的に付着したトナー
によつて形成された画像を上面に有するので、記
録紙は回動するベルトの上に乗せて搬送すると
か、更に回動するベルトの隙間もしくは回動する
ベルトに設けられた孔から吸引して記録紙をベル
トに吸着して搬送する手段がとられている。しか
しこのような搬送手段にするときは、装置は複雑
となり複写機本体も大型となる。そこで小型で安
価の複写機では、ベルトや吸引装置を全て除去
し、記録紙の進行方向に対して片側でしかも記録
紙の分離手段の設置してある側にコロ状の幅の狭
いローラで挾持・搬送する搬送手段を設置し、之
によつて記録紙を搬送することがなされる。 The recording paper separated from the photosensitive drum in this way is conveyed and carried into the above-mentioned fixing device, but in this process, the recording paper has an image formed by electrostatically adhered toner on its upper surface. Therefore, the recording paper is conveyed by placing it on a rotating belt, or there is a means of suctioning the recording paper from a gap between the rotating belts or a hole provided in the rotating belt to attract the recording paper to the belt and conveying it. is taken. However, when using such a conveyance means, the apparatus becomes complicated and the copying machine itself becomes large. Therefore, in small and inexpensive copying machines, all belts and suction devices are removed, and the paper is held between narrow rollers on one side of the paper in the direction of travel, and on the side where the paper separation means is installed. - A conveying means is installed, and the recording paper is conveyed by this means.
記録紙の感光ドラムからの分離手段及び定着装
置までの搬送手段を記録紙の進行方向の片側にの
み設置する場合には、記録紙の進行方向に対して
の左右では記録紙先端の浮き具合に極端な差が生
じてしまう。即ち搬送手段の設けられた側は分離
手段に続いて規制されるため、記録紙先端は下方
へ落ちる傾向にあつて、搬送板上を密着して進行
する。一方反対側の記録紙先端は感光ドラムから
剥離されたときに浮き気味となり、更に搬送手段
によつて反対側の記録紙先端が押さえられている
ために、この浮く傾向は助長される。この浮きは
サクシヨン等の吸引手段がないために押えられる
ことはない。 When the means for separating the recording paper from the photosensitive drum and the means for conveying it to the fixing device are installed only on one side in the direction of travel of the recording paper, the floating of the leading edge of the recording paper on the left and right with respect to the direction of travel of the recording paper may vary. An extreme difference will occur. That is, since the side where the conveyance means is provided is regulated following the separation means, the leading edge of the recording paper tends to fall downward and travels closely on the conveyance plate. On the other hand, the leading edge of the recording paper on the opposite side tends to float when it is peeled off from the photosensitive drum, and this floating tendency is exacerbated because the leading edge of the recording paper on the opposite side is held down by the conveying means. This float cannot be held down because there is no suction means such as suction.
このように記録紙先端が左右によつて極端に違
う浮き具合で定着ローラ対に進入した場合、記録
紙の押え込まれた側の先端はスムーズに定着装置
のローラ対のニツプ部に入いるが、記録紙の浮き
上つている側の先端は定着装置の入口上面に接触
したりして、紙折れやシワが生じたり、画像に乱
れが生じたりする。 If the leading edge of the recording paper enters the pair of fixing rollers with extremely different degrees of floating depending on the left and right sides, the leading edge of the paper on the pressed side will smoothly enter the nip of the pair of rollers in the fixing device. The tip of the raised side of the recording paper may come into contact with the upper surface of the inlet of the fixing device, causing folds and wrinkles in the paper and disturbances in the image.
本発明は前記のように、記録紙の片側のみを分
離ベルト及びコロ状のローラ等を用いて把持し、
感光ドラムから分離・搬送し定着装置に搬入する
ようにした複写装置にあつては、記録紙先端が片
側だけが極端に浮き上つた状態で定着装置に搬入
されるために生じる不具合を解消し、簡単でかつ
確実な記録紙搬送がなされる複写機における記録
紙案内装置を提供することを目的とする。
As described above, the present invention grips only one side of the recording paper using a separation belt, rollers, etc.
In the case of a copying device in which the recording paper is separated from the photosensitive drum and transported to the fixing device, the problem that occurs when the leading edge of the recording paper is transported to the fixing device with only one side extremely raised is eliminated. It is an object of the present invention to provide a recording paper guide device in a copying machine that allows recording paper to be conveyed simply and reliably.
本発明は上記目的を達成しようとするもので、
それは像担持体と、該像担持体に形成されたトナ
ー像を記録紙に転写する転写手段と、前記記録紙
を前記像担持体より分離する分離手段と、分離さ
れた記録紙一端を搬送する搬送手段と、前記記録
紙のトナー像を定着する定着手段を有する複写機
において、前記搬送手段と反対側の位置で且つ前
記定着手段間に、前記記録紙の搬送方向より見て
上側に位置し、内側を高く、外側を低く傾斜した
記録紙縁部案内手段を設けたことを特徴とする複
写機における記録紙案内装置により達成される。
The present invention aims to achieve the above object,
It includes an image carrier, a transfer means for transferring the toner image formed on the image carrier onto recording paper, a separation means for separating the recording paper from the image carrier, and a conveyor for transporting one end of the separated recording paper. In a copying machine having a conveyance means and a fixing means for fixing the toner image on the recording paper, a copying machine located at a position opposite to the conveyance means and between the fixing means and above when viewed from the conveyance direction of the recording paper. This is achieved by a recording paper guide device in a copying machine characterized in that a recording paper edge guide means is provided with a high slope on the inside and a low slope on the outside.
第１図は本発明の記録紙案内装置を設けた電子
写真複写機の要部断面図を示したもので、まずそ
の機能概要の説明を行なう。時計方向に回転する
感光ドラム１１上に形成されたトナー画像は、レ
ジストローラにより感光ドラム１１周面に向けて
送り込まれた記録紙上に転写電極１２により転写
される。ついでトナー画像の付着した記録紙はバ
ネ１３によつて感光ドラム１１の周上の分離側画
像欠け部に付勢され張設されている分離ベルト１
４によつて感光ドラム１１から分離される。更に
記録紙は分離側側端部に設けられた分離コロ１５
と分離ローラ１６に挾持されて搬送ガイド１７に
送られ、同じく分離側側端部に設けられた搬送コ
ロ１８と搬送ローラ１９の間を通つて定着装置２
０に達する。搬送コロ１８と搬送ローラ１９とは
或る程度調整することができ、最大通紙幅の記録
紙の場合の反対側端面の浮きを少なくすることが
できる。しかしこのような調整を行なつた場合に
はそれより幅の狭い常用通紙幅の記録紙での反対
側端面での浮き上りは大きい。
FIG. 1 shows a sectional view of a main part of an electrophotographic copying machine equipped with a recording paper guiding device of the present invention, and an overview of its functions will be first explained. The toner image formed on the photosensitive drum 11 rotating clockwise is transferred by the transfer electrode 12 onto a recording paper that is fed toward the circumferential surface of the photosensitive drum 11 by a registration roller. Next, the recording paper with the toner image attached thereto is urged by a spring 13 to the separation-side image-defected portion on the circumference of the photosensitive drum 11, and the separation belt 1 is stretched.
It is separated from the photosensitive drum 11 by 4. Furthermore, the recording paper is separated by a separation roller 15 provided at the edge on the separation side.
is held between the separation rollers 16 and conveyed to the conveyance guide 17, and passed between the conveyance rollers 18 and conveyance rollers 19, which are also provided at the separation side end, to the fixing device 2.
reaches 0. The conveyance rollers 18 and the conveyance rollers 19 can be adjusted to a certain extent, and lifting of the opposite end surface can be reduced in the case of recording paper having the maximum paper passing width. However, when such an adjustment is made, the lifting of the opposite end surface of recording paper having a narrower normal paper width is large.
定着装置２０は、熱源を内蔵して時計方向に回
転する定着ローラ２１と、之と圧接し従動回転す
る圧着ローラ２２との一対のローラから成つてい
て、定着ローラ２１は断熱カバー２３によつて包
囲されている。 The fixing device 20 consists of a pair of rollers: a fixing roller 21 that has a built-in heat source and rotates clockwise, and a pressure roller 22 that is in pressure contact with the fixing roller 21 and rotates drivenly. and is surrounded.
前記の搬送された記録紙は、圧着ローラ２２側
に設けた入口案内板２４上面に沿つて搬入され、
一対のローラのニツプ部で挾着・搬送され、トナ
ー像は記録紙に定着されて定着装置２０より排出
される。 The conveyed recording paper is carried in along the upper surface of the entrance guide plate 24 provided on the pressure roller 22 side,
The toner image is clamped and conveyed by the nip portion of a pair of rollers, and the toner image is fixed on the recording paper and discharged from the fixing device 20.
ここで記録紙先端が充分に押え込まれているも
のであれば、容易に入口案内板２４に沿つて定着
装置２０のニツプ部Ｎへ導かれるが、分離手段も
搬送手段も共に記録紙の同一片側に配置されてい
るので、反対側の記録紙先端は大きく浮き上り、
定着装置２０に搬入される際、入口上方の断熱カ
バー２３の下面に記録紙のトナー像の付着してい
る部分が接触して画像の乱れが生じてしまう。本
発明の縁部案内手段３１は之を防止するために設
けたものである。 Here, if the leading edge of the recording paper is sufficiently pressed down, it will be easily guided along the entrance guide plate 24 to the nip portion N of the fixing device 20, but both the separating means and the conveying means are Since it is placed on one side, the leading edge of the recording paper on the other side is raised greatly.
When the recording paper is carried into the fixing device 20, the portion of the recording paper on which the toner image is attached comes into contact with the lower surface of the heat insulating cover 23 above the entrance, causing image disturbance. The edge guide means 31 of the present invention is provided to prevent this.
第２図は第１図のＸ−Ｘ視図（記録紙進行方向
からみた図）を示したもので、定着装置２０の入
口上側で記録紙の分離・搬送手段のある側Ａに対
して反対のＢ側に記録紙の浮き上りを防止する縁
部案内手段３１を設けた。縁部案内手段３１は、
記録紙の搬入方向からみてニツプ部Ｎより上側に
位置し、定着ローラ２１軸に対してローラ端に近
づくほど低くなるように斜面３１ａをもつた板材
である。 FIG. 2 shows the X-X view of FIG. 1 (view from the recording paper advancing direction), and is opposite to the side A where the recording paper separating and conveying means is located above the entrance of the fixing device 20. An edge guide means 31 for preventing the recording paper from rising is provided on the B side of the recording paper. The edge guide means 31 is
It is a plate material that is located above the nip portion N when viewed from the direction in which the recording paper is carried in, and has a slope 31a that becomes lower as it approaches the roller end with respect to the axis of the fixing roller 21.
縁部案内手段３１は燐青銅等の金属板又はポリ
カーボネート等の弾性樹脂薄板で、本実施例では
記録紙搬入方向に対して、直角になるよう定着装
置２０の入口上側の断熱カバー２３に貼付けた
が、縁部案内手段３１の内側３１ｂが進行方向手
前側にあるよう傾斜をもたせるようにして取付け
ることも有効である。 The edge guide means 31 is a metal plate such as phosphor bronze or an elastic resin thin plate such as polycarbonate, and in this embodiment, it is attached to the heat insulating cover 23 above the entrance of the fixing device 20 so as to be perpendicular to the recording paper feeding direction. However, it is also effective to attach the edge guide means 31 with an inclination so that the inner side 31b is on the front side in the direction of movement.
また斜面３１ａは切断面であつても差支えない
が、薄板材を折曲げて小さな円弧断面をもつた斜
面にすると、記録紙端面に接触したときスベリを
よくする効果が生じる。 The slope 31a may be a cut surface, but if a thin plate material is bent to form a slope with a small circular arc cross section, the slope 31a will have the effect of improving the slippage when it comes into contact with the end surface of the recording paper.
このような縁部案内手段３１を設けた記録紙案
内装置に、片側端部Ａを分離・搬送手段によつて
規制されて記録紙が搬入されると、その記録紙の
反対側Ｂ先端は浮き上ろうとするが、この先端の
浮き上りは縁部案内手段３１の斜面３１ａによつ
て規制され、トナー画像の乗つている記録紙上面
が定着装置２０入口の断熱カバー２３に接触する
ことを防止し、画像乱れの発生も防止する。 When a recording paper is introduced into a recording paper guiding device provided with such an edge guide means 31 with one end A regulated by the separating and conveying means, the leading edge of the opposite side B of the recording paper is lifted. However, the rising of the leading edge is controlled by the slope 31a of the edge guide means 31, which prevents the top surface of the recording paper on which the toner image is carried from coming into contact with the heat insulating cover 23 at the inlet of the fixing device 20. , it also prevents image distortion from occurring.
なお記録紙の浮きを規制する縁部案内手段の最
適な設置位置として、その複写機の最大通紙幅に
相当する位置よりも、一般にはそれより内側にあ
つて最も常用されている通紙幅に相当する位置に
設定する方がより有効である。このように常用通
紙幅に相当する位置に斜面３１ａが適当な高さと
傾斜をもつよう縁部案内手段３１を設置すること
により常用通紙幅の記録紙の場合は勿論、最大通
紙幅の記録紙の場合にも一般には悪影響はなく同
様効果が認められる。 Note that the optimal installation position for the edge guide means that prevents the recording paper from floating is the position that corresponds to the maximum paper passing width of the copying machine, and is generally located on the inner side and corresponds to the most commonly used paper passing width. It is more effective to set the In this way, by installing the edge guide means 31 so that the slope 31a has an appropriate height and inclination at a position corresponding to the normal paper passing width, it can be used not only for recording paper of the normal paper passing width, but also for recording paper of the maximum paper passing width. In general, there are no adverse effects and the same effect is observed in other cases as well.
本発明により、記録紙の一端を分離手段によつ
て感光ドラムより分離し、ローラ対からなる定着
装置に搬入する記録紙の搬送経路に記録紙案内装
置を設けることにより、記録紙の搬送時に生じる
紙折れやシワを生じることがなくなり、又画像の
乱れが生じることがなくなつた。
According to the present invention, one end of the recording paper is separated from the photosensitive drum by the separating means, and a recording paper guide device is provided in the conveyance path of the recording paper to be carried into the fixing device consisting of a pair of rollers. Paper folds and wrinkles no longer occur, and image distortion no longer occurs.
第１図は本発明の一実施例を示す側断面図。第
２図はそのＸ−Ｘ視図。
１１……感光ドラム、１２……転写電極、１４
……分離ベルト、１７……搬送ガイド、１８……
搬送コロ、１９……搬送ローラ、２０……定着装
置、２１……定着ローラ、２２……圧着ローラ、
２３……断熱カバー、２４……入口案内板、３１
……縁部案内板。
FIG. 1 is a side sectional view showing an embodiment of the present invention. FIG. 2 is its XX view. 11...Photosensitive drum, 12...Transfer electrode, 14
... Separation belt, 17 ... Conveyance guide, 18 ...
Conveyance roller, 19... Conveyance roller, 20... Fixing device, 21... Fixing roller, 22... Pressure roller,
23...Insulation cover, 24...Entrance guide plate, 31
...Edge information board.
Claims (1)
像を記録紙に転写する転写手段と、 前記記録紙を前記像担持体より分離する分離手
段と、 分離された記録紙一端を搬送する搬送手段と、 前記記録紙のトナー像を定着する定着手段を有
する複写機において、 前記搬送手段と反対側の位置で且つ前記定着手
段間に、前記記録紙の搬送方向より見て上側に位
置し、内側を高く、外側を低く傾斜した記録紙縁
部案内手段を設けたことを特徴とする複写機にお
ける記録紙案内装置。[Scope of Claims] 1. An image carrier, a transfer means for transferring a toner image formed on the image carrier onto a recording paper, and a separating means for separating the recording paper from the image carrier; In a copying machine having a conveyance means for conveying one end of the recording paper, and a fixing means for fixing the toner image on the recording paper, a portion of the recording paper is located at a position opposite to the conveyance means and between the fixing means, from the conveyance direction of the recording paper. What is claimed is: 1. A recording paper guide device for a copying machine, characterized in that a recording paper edge guide means is provided on the upper side as seen, and has a high inner side and a low outer side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15846084A JPS6135473A (en) | 1984-07-27 | 1984-07-27 | Recording paper guiding device of copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15846084A JPS6135473A (en) | 1984-07-27 | 1984-07-27 | Recording paper guiding device of copying machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6135473A JPS6135473A (en) | 1986-02-19 |
| JPH0318186B2 true JPH0318186B2 (en) | 1991-03-11 |
Family
ID=15672224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15846084A Granted JPS6135473A (en) | 1984-07-27 | 1984-07-27 | Recording paper guiding device of copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6135473A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005094188A3 (en) * | 2004-03-31 | 2005-12-08 | Kazuhisa Maeda | Method of invasiveness control and use of adiponectin |
-
1984
- 1984-07-27 JP JP15846084A patent/JPS6135473A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005094188A3 (en) * | 2004-03-31 | 2005-12-08 | Kazuhisa Maeda | Method of invasiveness control and use of adiponectin |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6135473A (en) | 1986-02-19 |
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