JPS581172A - Radiation heat fixing device - Google Patents
Radiation heat fixing deviceInfo
- Publication number
- JPS581172A JPS581172A JP9892981A JP9892981A JPS581172A JP S581172 A JPS581172 A JP S581172A JP 9892981 A JP9892981 A JP 9892981A JP 9892981 A JP9892981 A JP 9892981A JP S581172 A JPS581172 A JP S581172A
- Authority
- JP
- Japan
- Prior art keywords
- recording paper
- light
- fixing device
- luminous flux
- reflecting mirror
- 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
- 230000005855 radiation Effects 0.000 title description 5
- 108091008695 photoreceptors Proteins 0.000 claims abstract description 19
- 230000001154 acute effect Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 2
- 230000004907 flux Effects 0.000 abstract description 18
- 238000010586 diagram Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 2
- 230000006386 memory function Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007787 solid Substances 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
- G03G15/2007—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using radiant heat, e.g. infrared lamps, microwave heaters
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
を伴う放射熱源定着装置を適用する場合の漏光防止にｉ
するものである。[Detailed Description of the Invention] To prevent light leakage when applying a radiant heat source fixing device with
It is something to do.
電子写真感光体上に形成した静電層像をトナーによって
可視化し、このシナ−像を記録紙上に転写し、記録紙上
の）ナー像を発光を伴う放射加熱定着装置によって熔融
固着させ、一方トナー像を転写した後の感光体は残留ト
ナーを除失し、静電潜像を消失して再使用するようにＩ
ｋ成した電子写真装置は公知である。かかる電子写真装
置において放射加熱定着装置からの漏光が電子写真感光
体に作用して感光体の光疲労を引き起したり、特に一度
感光体上に形成した潜像のメモリー作用に基いて現像転
写をくり返して複数枚の複写画像を形成するようにＩＩ
Ｉ！成した電子写真装置においては、放射加熱定着装置
からの漏光が感光体に入射するｍ化させたり、消失させ
て潜像のメモリー機能を損う欠点があった。この欠点を
絵失するために従来の電子写真装置においては、実開昭
ＳＳ−ｌ９シ９号公報に記載のある通り、発光を伴う加
熱電着装置とくり返し使用される感光体の間に遮光のた
めの部材を配設する改良が知られているが、記録紙の搬
送路を経由する漏光を完全には防止することはできず、
特開Ｆ１３１Ｊ−タｊダコ号公報に記載のある通り、感
光体と定着装置との間のシャッターを配設する改良が提
案されているが、記録紙全面を一度に定着する構成の装
置以外には適用できない等いずれも欠点があった。第１
図ムは従来の放射加熱定着装置として公知のフラッシュ
足着装置の定着部の構成を示す断面図である。フラッシ
ュランプＬ１を包囲する長方形のキャビチーｌ内面に反
豹昶面／ａ ＃ ／ｂ ｌ １０が形成されており、そ
の−辺が開口部となって記録紙λの面と対向している。The electrostatic layer image formed on the electrophotographic photoreceptor is visualized with toner, this toner image is transferred onto recording paper, and the toner image on the recording paper is melted and fixed by a radiation heating fixing device that emits light. After the image has been transferred, the photoreceptor is heated to remove residual toner and erase the electrostatic latent image so that it can be reused.
Electrophotographic apparatuses of this type are well known. In such electrophotographic apparatuses, light leakage from the radiation heat fixing device acts on the electrophotographic photoreceptor, causing optical fatigue of the photoreceptor, and in particular, development and transfer may occur based on the memory effect of the latent image once formed on the photoreceptor. II to repeat the process to form multiple copies of the image.
I! In the developed electrophotographic apparatus, there is a drawback that light leakage from the radiation heating fixing device is caused to enter the photoreceptor or disappear, impairing the memory function of the latent image. In order to eliminate this drawback, in conventional electrophotographic apparatuses, as described in Japanese Utility Model Application Publication No. 1987, light is shielded between a heating electrodeposition device that emits light and a photoreceptor that is used repeatedly. Although improvements are known in which a member is provided for the recording paper, it is not possible to completely prevent light leakage through the recording paper conveyance path.
As described in Japanese Patent Application Laid-Open No. F131J-Tadako, an improvement has been proposed in which a shutter is provided between the photoreceptor and the fixing device, but this method is not suitable for devices other than those configured to fix the entire surface of the recording paper at once. Both methods had drawbacks, such as not being applicable. 1st
FIG. 1 is a sectional view showing the structure of a fixing section of a flash foot fixing device known as a conventional radiation heating fixing device. A rectangular cavity l surrounding the flash lamp L1 has an inner surface formed with an anti-leopard surface /a # /b l 10, the negative side of which serves as an opening and faces the surface of the recording paper λ.
記録紙λの面に向う光束はラシプＬ工がらのｉｋ接接光
、キャビチー／ｌ−構成する各辺の内面が反射鏡１１［
ｉ／ａ 、 ／ｂ 、 ／Ｃとなっているので、この反
射鏡面からの反射光とがある。キャビチーｌによる反射
光は点線の円で示した部分に光源Ｌ１の虚’ＩＩ Ｌ！
！ ｅ Ｌｓがあって、ここから光束が発生するような
方向に向う。したがって実線矢印ｄにて示した方向に走
向する記録紙Ｊｌ［に対して水平に近い入射角の光束と
なる。定着装置から図示しない感光体方向すなわち第１
図ムの左方向に向う漏光はキャビチーｌと記録紙コの面
の１間から発生するものであるが、記録紙コの進入側の
開口へ向う光束成分が多いと漏光も多くなり、これは記
録紙、２Ｉｌｉ［ｉへ入射する光束の角度を記録紙コの
面を起点として反時計方向にとったときの角度θが小ざ
な入射光束に多鎗に含まれる。点線矢印は角度θが小ざ
な光束につき記録紙コの面で乱反射光の中で開口方向に
向う成分をベクＦル表示したもので、ベクシルが長いも
のは主として虚像Ｌ２がら発生したような光束である。The light flux directed toward the surface of the recording paper λ is incident on the ik of the laser beam L, and the inner surface of each side forming the cavity is the reflecting mirror 11 [
Since i/a, /b, /C, there is light reflected from this reflecting mirror surface. The light reflected by the cavity L is reflected by the imaginary 'II L! of the light source L1 in the area indicated by the dotted circle.
! e Ls, from which the light beam is directed in the direction in which it is generated. Therefore, the light beam has an incident angle close to horizontal to the recording paper Jl running in the direction indicated by the solid arrow d. From the fixing device to the photoreceptor (not shown), that is, the first
Light leakage toward the left side of the diagram occurs from the space between the cavity L and the surface of the recording paper 1, but if there is a large amount of light flux component toward the entrance side opening of the recording paper 2, there will be more light leakage; When the angle of the light beam incident on the recording paper, 2Ili[i, is taken counterclockwise from the surface of the recording paper, the angle θ is included in the small incident light beam. The dotted arrows represent the components of light beams with small angles θ that are diffusely reflected on the surface of the recording paper and directed toward the aperture direction, and those with long vexiles are mainly light beams generated from the virtual image L2. be.
第１図Ｂ、Ｏは記録紙面への入射角θが異った場合の記
録紙λの面での乱反射光の方向別の強度分布を示す図で
ある。FIGS. 1B and 1O are diagrams showing the intensity distribution of diffusely reflected light in different directions on the surface of the recording paper λ when the incident angle θ on the recording paper surface is different.
第１図Ｂは垂直に入射した光束に対する反射の分布を示
し、これに対する反射光は対称形の分布となっていて垂
直方向の反射が最も強く、記録紙コの面を起点に時計方
向にとった小さな角度θ、方向に向う成分は比較的小ざ
い。第１図Ｃは入射角θが小ざくなった時の反射光の分
布を示す図で、θ、＝θの場合が最大の反射強度となる
が、第１図Ｂと１句じ小ざな反射角度θ、における反射
光強度も第１図Ｂの場合より着しく大きくなる。これに
対して入射光の方向にθ、をとった場合の反射光成分は
着しく少なくなる。反射角度θ、の小ざな光束がキャビ
チー７と記録紙λ間の開口を通って゛感光体方向へ向う
光束となるので、感光体への漏光を減少させるためには
＆射角度θ１が小ざなときの光束の強度を弱めるように
すればよいが、従来公知の定着装置ではこの点がほとん
ど考ＩＩＬされておらず、したかつて定着器から感光体
方向へ向う漏光を防止することができなかった。Figure 1B shows the distribution of reflection for a perpendicularly incident light beam, and the reflected light has a symmetrical distribution, with the vertical reflection being the strongest, and when taken clockwise from the surface of the recording paper. For a small angle θ, the component toward the direction is relatively small. Figure 1C is a diagram showing the distribution of reflected light when the incident angle θ becomes small.The maximum reflection intensity occurs when θ, = θ, but as shown in Figure 1B, the reflection is small. The reflected light intensity at the angle θ also becomes significantly larger than in the case of FIG. 1B. On the other hand, when the direction of the incident light is set at θ, the reflected light component is significantly reduced. A small beam of light with a reflection angle θ passes through the opening between the cavity 7 and the recording paper λ and becomes a light beam heading toward the photoconductor.In order to reduce light leakage to the photoconductor, it is necessary to make the reflection angle θ1 small. However, in the conventionally known fixing devices, little consideration has been given to this point, and in the past it has not been possible to prevent light leakage from the fixing device toward the photoreceptor.
本発明は上記の欠点を解消し、トナー像転写式電子写真
装置に発光１伴う放射熱源定着装置を適用する場合、定
着装置からの漏光によって再使用＜、発光を伴う放射熱
一定着装置の反射鏡の形状および光源の配置を改良し、
感光体方向への漏光を防止した定着装置を提供すること
を目的とするものである。The present invention solves the above-mentioned drawbacks, and when a radiant heat source fixing device with light emission is applied to a toner image transfer type electrophotographic device, the leakage of light from the fixing device causes reuse, and the reflection of the radiant heat fixing device with light emission. Improved the shape of the mirror and the placement of the light source,
It is an object of the present invention to provide a fixing device that prevents light leakage toward a photoreceptor.
本発明は電子写真感光体上の静電潜像を現像して形成し
た粉末トナー像を記録紙上に転写し、これを発光を伴う
放射熱源と反射鏡とを有する定着装置によって融着し、
電子写真感光体上の残留トナーを除去してくり返し使用
する構成の電子写真装置に対して適用される定着装置に
おいて、前記反射鏡をほぼ楕円状に形成し、この楕円の
焦点位置に放射熱源を配設し、反射鏡の開口部に対向し
て記録紙搬送路を設け、該記録紙搬送路が前記楕円の第
１の焦点と第λの焦点とを結ぶ線分に交叉し、かつこの
交叉点と放射熱源とを結ぶ平面が交叉点に至る記録紙の
進入側搬送路に鋭角をなして交叉するように前記楕円反
射鏡、放射熱源、記録紙搬送路を構成・配設したことを
特鍛とするものである。In the present invention, a powder toner image formed by developing an electrostatic latent image on an electrophotographic photoreceptor is transferred onto recording paper, and this is fused by a fixing device having a radiant heat source that emits light and a reflecting mirror.
In a fixing device applied to an electrophotographic apparatus configured to remove residual toner on an electrophotographic photoreceptor for repeated use, the reflecting mirror is formed into a substantially elliptical shape, and a radiant heat source is provided at the focal point of the ellipse. a recording paper transport path is provided opposite to the opening of the reflecting mirror, and the recording paper transport path intersects a line segment connecting the first focal point and the λ-th focal point of the ellipse; The elliptical reflector, the radiant heat source, and the recording paper conveyance path are configured and arranged so that a plane connecting the point and the radiant heat source intersects the entrance side conveyance path of the recording paper leading to the intersection point at an acute angle. It is something to be trained.
□ 以下図面を参照して本発明の詳細な説明する。□ The present invention will be described in detail below with reference to the drawings.
なお、従来の定着装置の定着部を示した第１図ム。Note that FIG. 1 shows a fixing section of a conventional fixing device.
Ｂ、Ｏの４ｍｆｔ、部材と同一の部材には同一の符号を
用いる。The same reference numerals are used for the same members as B and O 4mft.
第２図は本発明の定着装置の一実施例の＃１或を示すた
めのＭＶＪｊ図である◎ランプＬ工は発光を伴う放射加
熱エネルギー源であって午セノン７ランツシユラシプや
へロゲンラシプ等の光源がこれに該当する。反射鏡Ｍは
その断面形状が楕円形であって、かつ内面は可能な限り
高い反射率をもつようにｗｋｒｋＪ加工されていること
が望ましい。光源りよは楕円の第１の焦点位置Ｆ工に配
置する。光源Ｌ工から出射されて反射＃ｉＩＴ［ｉで反
射した光束は楕円の第２の焦点Ｆ２に集光する方向に向
う。記録紙搬送路は図示例では、吸引ベル）装置によっ
て構成する。吸引ベルト装置はベル）Ｊとこれを掛は渡
すためのローうグ、ｊと吸引ボックス乙によって構成す
る。ローラ４（、ｊを矢印方向に、図示しない駆動装置
により回転駆動し、記録紙λをａｍするベルト３を矢印
ｅ方向に移動して記録紙搬送路を形成している。記録紙
搬送路は楕円の第１の焦点ｙよと第一の焦点ｙ２とを結
ぶ平面と交叉し、ベル）Ｊの進行方向、すなわち紀鰺紙
搬送方向ｅに対して鋭角をなして交叉するように配置す
る。光源Ｌ工からの放射エネルギーは実線で示した直接
光と楕円反射鏡舅の内面で反射した点線矢印にて示す光
束が記録紙−の面に作用しトナーの融着に寄与する。実
線にて示した直接光の内、感光体方向すなわち記録紙コ
の進入側方向へ傾斜している光束は大部分楕円反射鏡Ｍ
で遮＃され、備かに残った光束も記録紙コの面に対して
垂直に近い角度で入射するものである。これに対して記
録紙λの排出方向すなわち第２図の右側へ傾斜している
光束は規制されていないために記録紙λの面と平行に近
い光束まで存在する。これに対して楕円反射＆Ｍの内面
で反射する光束は点線矢印にて示されているが、すべて
楕円の第２の焦点Ｆ、に向う光束であるから、楕円の第
一の焦点Ｆ２が定着器の記録紙−の排出側終端近くにな
るように配置しておけば、総ての光束は記録紙−の排出
側に向って傾斜したものとなる。したがって記録紙コの
面で乱反射した結果生ずる光束も第１図０から珈解され
るように記録紙λの排出側に同う成分が圧倒的に多く、
記録紙λの進入側に向う光束はきわめて像かとなり、そ
の結果感光体への漏光を大幅に減少させることができる
０
第３図は本発明の漏光全防止した定着装置の楕円反射鏡
と記録紙搬送路の組合せ全示す線図であるＯ第３図につ
いて楕円反射鏡Ｍと記録紙搬送路の組合せの変化１睨明
する。符号Ｆよは楕円の第７の焦点を、Ｆ２はこの楕円
の＃Ｉ２の焦点全示す。符号ａおよびｂはそれぞれ別々
に記録紙搬送路全示している。搬送路ａは＠−図と同じ
記録紙搬送路であって、楕円の両焦点全結ぶ線分ＦＩＦ
２の中央部Ｃ０に交点を有しており、記録紙搬送路ａと
線分子４は鋭角θ、で交叉している。記録搬送路すと楕
円の焦点を結ぶ線分百４は交点０．で交叉している０ま
た、このときの搬送路すと楕円の焦点全納ぶ線分の交叉
角度は鋭角θ２で交わっている０楕円の第１の焦点Ｆ工
に光＠全配置するものであるから光源からの直接光の出
射方向と楕円反射鏡Ｍの内面での反射光束の方向は定っ
た方向をとるが、記録紙面へ入射する光線の角度は搬送
路＆と搬送路すとは異なった値となる。θ２〉θ、であ
るから記録紙面へ入射する各光束の角度は搬送路ａに比
べ搬送路すの方がより垂直に近くなるが、交叉角θ２が
鋭角である限り楕円の第一の焦点Ｆ２は定着器の排紙側
に偏倚するから記録紙の排紙方向に各光束は傾斜する傾
向全示し、本発明の目的に対しては有効であるが、交叉
角θ２が一５０以上になると効果が減少しはじめ、Ｊｏ
を越えると効果は部分的なものとなってしまう０記録紙
搬送路中の配光分布においても搬送路ａと搬送路すでは
異なった様相となる。FIG. 2 is a MVJ diagram showing #1 of an embodiment of the fixing device of the present invention. ◎The lamp L is a radiant heating energy source that emits light, and is a light source such as a senon 7 lamp, a herogen lamp, etc. falls under this category. It is desirable that the reflecting mirror M has an elliptical cross-sectional shape, and that the inner surface is processed by wkrkJ so as to have as high a reflectance as possible. The light source is placed at the first focal point F of the ellipse. The light beam emitted from the light source L and reflected by the reflection #iIT[i heads in the direction of condensing at the second focal point F2 of the ellipse. In the illustrated example, the recording paper conveyance path is constituted by a suction bell device. The suction belt device consists of a bell (J), a rogue for hanging and passing it, J and a suction box (B). The rollers 4 (, j) are rotationally driven in the direction of the arrow by a drive device (not shown), and the belt 3 carrying the recording paper λ is moved in the direction of the arrow e to form a recording paper conveyance path.The recording paper conveyance path is It is arranged so as to intersect the plane connecting the first focal point y and the first focal point y2 of the ellipse, and to form an acute angle to the traveling direction of the bell (J), that is, the Kisashi paper transport direction e. The radiant energy from the light source L is the direct light shown by the solid line and the light beam reflected by the inner surface of the elliptical reflector and shown by the dotted arrow, which acts on the surface of the recording paper and contributes to the fusing of the toner. Of the direct light shown by the solid line, most of the light flux that is inclined toward the photoconductor, that is, toward the entrance side of the recording paper, is reflected by the elliptical reflector M.
The remaining light flux that is blocked by the recording paper is also incident on the surface of the recording paper at an angle close to perpendicular to the surface of the recording paper. On the other hand, the light beams that are inclined toward the ejecting direction of the recording paper λ, that is, to the right in FIG. 2, are not regulated, and therefore there are light fluxes that are almost parallel to the surface of the recording paper λ. On the other hand, the luminous flux reflected on the inner surface of the elliptical reflection &M is indicated by a dotted arrow, but all of the luminous flux is directed toward the second focal point F of the ellipse, so the first focal point F2 of the ellipse is the fixing device. If the recording paper is arranged near the end on the discharge side of the recording paper, all the light beams will be inclined toward the discharge side of the recording paper. Therefore, as can be seen from FIG. 1, the light flux generated as a result of diffuse reflection on the surface of the recording paper λ has an overwhelmingly large amount of the same component on the ejection side of the recording paper λ.
The light beam directed toward the entrance side of the recording paper λ becomes extremely image-like, and as a result, light leakage to the photoreceptor can be significantly reduced.0 Figure 3 shows the elliptical reflector and recording of the fixing device that completely prevents light leakage according to the present invention. Referring to FIG. 3, which is a diagram showing all the combinations of paper transport paths, changes in the combinations of the elliptical reflector M and the recording paper transport path will be briefly examined. The symbol F indicates the seventh focus of the ellipse, and F2 indicates the entire focus of #I2 of this ellipse. Symbols a and b indicate the entire recording paper transport path, respectively. Conveyance path a is the same recording paper conveyance path as in the @- figure, and is a line segment FIF that connects both focal points of the ellipse.
The recording paper transport path a and the line molecule 4 intersect at an acute angle θ. The recording transport path and the line segment 104 connecting the focal point of the ellipse have an intersection point of 0. In addition, the intersection angle of the line segments where the focal points of the ellipses are completely located is 0, which intersects at an acute angle θ2. Although the direction of the direct light emitted from the light source and the direction of the reflected light flux on the inner surface of the elliptical reflector M take a fixed direction, the angle of the light beam incident on the recording paper surface is different from the transport path &. will be the value. Since θ2>θ, the angle of each light beam incident on the recording paper surface is closer to perpendicular on the transport path than on the transport path a, but as long as the intersection angle θ2 is an acute angle, the first focal point F2 of the ellipse is biased toward the paper ejection side of the fixing device, so each light beam tends to be inclined in the paper ejection direction of the recording paper, which is effective for the purpose of the present invention, but it is effective when the intersection angle θ2 is 150 or more begins to decrease, and Jo
If the value exceeds 0, the effect becomes only partial.Even in the light distribution in the recording paper transport path, the transport path a and the transport path have different aspects.
搬送路ａの場合は＃！λ図に示した各光束が記録紙コと
交る位置から概略の記録紙コの面での配光分布を読み取
ることができる。光源Ｌ工からの直接光は実線で示され
、記録紙コの面と光束が直交する部位Ｐに配光分布のピ
ークを作る。これに対して楕円反射鏡Ｍでの反射先番ゴ
、記録紙搬送路の中央からやや排紙側によった部分Ｑに
ピークを作り、ピークは比較的なだらかである。第１の
ピーク点Ｐではほとんで直接光のみ作用し、第２のピー
ク点Ｑでは楕円反射鏡Ｍでの反射光が作用の主体となる
が、ピーク点Ｐとピーク点Ｑとの中間部では両光束がミ
ックスして作用し、更には図示されていないが記録ＩＩ
＆λの面からの乱反射光が再度楕円反射鏡ｙの内面で反
射して排紙＠部分に作用し、記録紙搬送路のほぼ全面に
わたって平均的に光束が作用する。１ｇ３図の搬送路す
で示すように記録紙搬送路の楕円軸に対する角度θ２が
直角に近くなるに従って、直接光、反射光の配光のピー
クは交点Ｃ２に近よる方向に移動し中央部に高いピーク
をもつ配光分布となる。記録紙搬送路を光源に近ずけて
交点０２力楕円の第７の焦点Ｆ工に近い位置にくるよう
に記録紙搬送路を設定すると、直接光による配光のピー
クは高くなってピークの巾は狭くなり、反射光による配
光はフラットになる。# for transport path a! The approximate light distribution on the surface of the recording paper can be read from the position where each light beam shown in the λ diagram intersects with the recording paper. Direct light from the light source L is shown by a solid line, and creates a peak in the light distribution at a location P where the light beam intersects perpendicularly to the surface of the recording paper. On the other hand, when the first number is reflected by the elliptical reflecting mirror M, a peak is formed at a portion Q slightly toward the paper discharge side from the center of the recording paper transport path, and the peak is relatively gentle. At the first peak point P, only direct light acts, and at the second peak point Q, the main effect is reflected light from the elliptical reflector M, but in the middle between peak points P and Q, Both light fluxes mix and act, and furthermore, although not shown, record II
The diffusely reflected light from the surface &λ is again reflected by the inner surface of the elliptical reflector y and acts on the ejected sheet @ portion, so that the light flux acts on almost the entire surface of the recording sheet transport path on average. Conveyance Path in Figure 1g3 As already shown, as the angle θ2 of the recording paper conveyance path with respect to the elliptical axis becomes closer to a right angle, the peaks of the light distribution of the direct light and reflected light move closer to the intersection C2 and become closer to the center. This results in a light distribution with a high peak. If the recording paper transport path is set close to the light source and close to the seventh focal point F of the intersection point 02 force ellipse, the peak of the light distribution due to direct light will become higher and the peak will be lower. The width becomes narrower, and the light distribution due to reflected light becomes flat.
逆に交点０２が楕円の第１の焦点Ｆ工から遠ざかると直
接光のピークが低くフラットとなるのに対して反射光の
配光のピークはシャープなものとなる。Conversely, when the intersection point 02 moves away from the first focal point F of the ellipse, the peak of the direct light becomes low and flat, whereas the peak of the light distribution of the reflected light becomes sharp.
このように記録紙搬送路の楕円軸に対する角度と楕円の
第１の焦点からの距離を変化させると配縁紙搬送路上で
の配光分布を変化させる事ができる。In this way, by changing the angle of the recording paper transport path with respect to the ellipse axis and the distance from the first focal point of the ellipse, the light distribution on the bound paper transport path can be changed.
なお、第１図および第３図の駁明において、反射ｔＲを
完全な楕円カーブをもつ、ものとして説明したが、これ
を多角形によって近似させたものをもってして１本発明
の目的はほぼ同等に達成し得ることは容易に理解される
ところである。また、本発明は単独で用いてその効果全
発揮させることができるが、更に実開昭５ｓ−ｒｑＨ号
公報に開示されているような別の漏光防止手段を併用し
て漏光防止効果全完全なものにするために適用すること
もできる。In addition, in the explanations of FIGS. 1 and 3, the reflection tR was explained as having a perfect elliptic curve, but the object of the present invention is almost equivalent to that by approximating this with a polygon. It is easy to see what can be achieved. Further, although the present invention can be used alone to achieve its full effect, it can also be used in combination with another light leakage prevention means as disclosed in Japanese Utility Model Application Publication No. 5s-rqH. It can also be applied to make something.
なお、本発明は上述の実施例に限定されるものでなく、
特許請求の範囲内で種々の変更が可能である。Note that the present invention is not limited to the above-mentioned embodiments,
Various modifications are possible within the scope of the claims.
本発明によれば、発光を伴う定着装置がら、くりかえし
使用される感光体方向へ向う漏光を著しく減少させるこ
とができ、感光体の光疲労と特に、一度感光体上に形成
した潜像のメモリー作用に基いて現像転寥ｔくりかえし
て複数枚の複写画像を形成するように構成した電子写真
装置において、潜像を消失させて潜像のメモリー機能全
損うことを防止する効果がある〇According to the present invention, it is possible to significantly reduce light leakage toward a photoreceptor that is used repeatedly from a fixing device that emits light. In an electrophotographic device configured to form multiple copies of images by repeating the development process based on the action, it has the effect of eliminating the latent image and preventing the memory function of the latent image from being completely lost.
第１図Ａは従来の７ラツシユ定着装置の定着部の断面図
、第１図Ｂは記録紙面に垂直に入射した光束に対する乱
反射光の方向別の強度分布を示すＳ図、＠／図Ｏは記録
紙面への入射角が小さくなった時の乱反射光の方向別の
強度分布を示Ｔ４１図、ｌｌ！λ図は本発明の漏光を防
止した定着装置の縦断面図、＃１！３図は本発明の漏光
を防止した定着装置の簿円反射鏡と記録紙搬送路の組合
せを示す線図である。
ｌ・・キー？ ヒｆ−１／ａｌ ／ｂ ｌ １０・・・
反射鏡面、λ・・・記録紙、３・・・ベルト、４１．ｊ
・・・ローラ、６・・・吸引ボックス、Ｏｌ、０２・・
・交点、Ｆ工＋Ｆ２・・・楕円の焦点、Ｌよ・・・光源
、Ｌ２ ｔ Ｌ３−’・虚像、Ｍ・・・楕円度ｔｔ鏡、
ｐ・・・第１のピーク、Ｑ・・・＃！λのピーク、ａ＋
ｂ・・・記録紙搬送路、ｄ・・・記録紙の搬送方向、ｅ
・・・ベルト移動方向。Figure 1A is a cross-sectional view of the fixing section of a conventional 7-lash fixing device, Figure 1B is an S diagram showing the intensity distribution of diffusely reflected light in different directions for a light beam incident perpendicularly to the recording paper surface, and @/Figure O is Figure T41 shows the intensity distribution by direction of diffusely reflected light when the angle of incidence on the recording paper surface becomes small, ll! Figure λ is a longitudinal sectional view of the fixing device that prevents light leakage according to the present invention, and Figures #1 and 3 are diagrams showing the combination of the book-shaped reflector and the recording paper conveyance path of the fixing device that prevents light leakage according to the present invention. . l... key? h f-1/al/b l 10...
Reflective mirror surface, λ...Recording paper, 3...Belt, 41. j
...Roller, 6...Suction box, Ol, 02...
・Intersection, F + F2...focal point of ellipse, L...light source, L2 t L3-'・virtual image, M...ellipticity tt mirror,
p...first peak, Q...#! peak of λ, a+
b... Recording paper conveyance path, d... Recording paper conveyance direction, e
...Belt movement direction.
Claims (1)
末シナ−像を記録紙上に転写し、これな発光を伴う放射
熱源と反射鏡とを有する定着装置によって融着し、電子
写真感光体上の残留トナーを除去してくり返し使用する
構成の電子写真装置に対して適用される定着装置におい
て、前記反射鏡をほぼ楕円状に形成し、この楕円の焦点
位置に放射熱源を配設し、反射鏡の細口部に対向して記
録紙搬送路を設け、該記録紙搬送路が前記楕円の第１の
焦点と納コの焦点とを結ぶ線分に交叉し、かつこの交叉
点と放射熱源とを結ぶ平面が交叉点に至る記録紙の進入
側搬送路に鋭角を表して交叉するように前記楕円反射鏡
、放射熱源、記録紙搬送路を１１成・配設したことを特
徴とする放射加熱定着装置。The powder image formed by developing the electrostatic latent image on the L-child photographic photoreceptor is transferred onto recording paper, fused by a fixing device having a radiant heat source that emits light and a reflecting mirror, and then In a fixing device applied to an electrophotographic apparatus configured to remove residual toner on a photographic photoreceptor for repeated use, the reflecting mirror is formed into a substantially elliptical shape, and a radiant heat source is arranged at the focal point of the ellipse. a recording paper transport path is provided opposite the narrow opening of the reflecting mirror, and the recording paper transport path intersects a line segment connecting the first focal point of the ellipse and the focal point of the ellipse, and the intersection point The elliptical reflecting mirror, the radiant heat source, and the recording paper conveyance path are arranged in eleven configurations so that the plane connecting the and the radiant heat source intersects the entrance side conveyance path of the recording paper at an intersection point at an acute angle. A radiant heating fixing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9892981A JPS581172A (en) | 1981-06-25 | 1981-06-25 | Radiation heat fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9892981A JPS581172A (en) | 1981-06-25 | 1981-06-25 | Radiation heat fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS581172A true JPS581172A (en) | 1983-01-06 |
Family
ID=14232809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9892981A Pending JPS581172A (en) | 1981-06-25 | 1981-06-25 | Radiation heat fixing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS581172A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7662242B2 (en) | 2004-11-04 | 2010-02-16 | Nippon Steel Corporation | Non-oriented electrical steel superior in core loss |
-
1981
- 1981-06-25 JP JP9892981A patent/JPS581172A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7662242B2 (en) | 2004-11-04 | 2010-02-16 | Nippon Steel Corporation | Non-oriented electrical steel superior in core loss |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100472468B1 (en) | Optical guide and image forming apparatus employing it | |
| US8285186B2 (en) | Laser fixing device and image forming apparatus | |
| JP5293493B2 (en) | Fixing device and image forming apparatus using the same | |
| US8249493B2 (en) | Fixing apparatus and image forming apparatus | |
| JP2704955B2 (en) | Flash lamp fuser | |
| US4333130A (en) | Slit illuminating device | |
| JP3673709B2 (en) | Optical scanning apparatus and image forming apparatus | |
| JP2001264665A (en) | Optical scanner, scanning optical system, scanning image- formation optical element, optical scanning method, ghost image protection method and image forming device | |
| US3606535A (en) | Device for rectifying uneven distribution of illumination intensity in a slit exposure mechanism | |
| JPS59128569A (en) | Laser fixing device | |
| JPS581172A (en) | Radiation heat fixing device | |
| JP5948991B2 (en) | Fixing apparatus and image forming apparatus | |
| JP5246373B1 (en) | Fixing apparatus and image forming apparatus | |
| JP3819157B2 (en) | Optical device | |
| JP2021110891A (en) | Optical scanner and image forming apparatus | |
| JPH0481780B2 (en) | ||
| JPH0420187B2 (en) | ||
| JP7099083B2 (en) | An optical scanning device and an image forming apparatus provided with the optical scanning device. | |
| JPS60252383A (en) | Flash fixing device | |
| GB2045450A (en) | Line-by-line photocopying | |
| JP2011090188A (en) | Optical scanner and image forming apparatus using the same | |
| JPH0222679A (en) | Illuminator | |
| JP5137689B2 (en) | Image forming apparatus | |
| JP2001013433A (en) | Plural-beam scanner and image forming device | |
| JPS6113274A (en) | Flash fixing device |