JPH0361949B2 - - Google Patents
Info
- Publication number
- JPH0361949B2 JPH0361949B2 JP57216965A JP21696582A JPH0361949B2 JP H0361949 B2 JPH0361949 B2 JP H0361949B2 JP 57216965 A JP57216965 A JP 57216965A JP 21696582 A JP21696582 A JP 21696582A JP H0361949 B2 JPH0361949 B2 JP H0361949B2
- Authority
- JP
- Japan
- Prior art keywords
- belt
- photosensitive material
- shaped
- exposure
- shaped photosensitive
- 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
- 239000000463 material Substances 0.000 claims description 47
- 238000000034 method Methods 0.000 description 8
- 235000003805 Musa ABB Group Nutrition 0.000 description 2
- 240000008790 Musa x paradisiaca Species 0.000 description 2
- 235000015266 Plantago major Nutrition 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009423 ventilation Methods 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
- G03G15/75—Details relating to xerographic drum, band or plate, e.g. replacing, testing
- G03G15/754—Details relating to xerographic drum, band or plate, e.g. replacing, testing relating to band, e.g. tensioning
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Structure Of Belt Conveyors (AREA)
Description
【発明の詳細な説明】
本発明は、電子写真複写機、プリンター等に利
用されるベルト状感材を用いた画像形成装置に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image forming apparatus using a belt-shaped photosensitive material used in electrophotographic copying machines, printers, and the like.
従来、ベルト状感材を用いた画像形成装置とし
ては、例えば特開昭50−87332号公報や特開昭55
−52082号公報に示されるものがある。いずれも
ベルト状感材の周囲に帯電器、露光部、現像機、
転写器等を順次配設し、ベルト状感材を帯電器で
帯電した後に露光部で像露光して静電潜像を形成
し、その静電潜像を現像機で可視像に現像した後
に転写器で用紙に転写するようにしたものである
が、露光部を、ベルト状感材を支持する部材（ロ
ール）上に設けるか、あるいはベルト状感材を支
持する部材間に設けるかで異なつている。前者の
ものは、曲率の大きい部材すなわちロール上であ
るため、露光領域を大きく（長く）とれないの
で、原稿をスリツト光で走査して感材上に順次ス
リツト状の露光像を形成していく、所謂スリツト
露光方式しか適用できず、走査に時間を要するた
め高速複写には不向きである。一方、後者のもの
は、ベルト状感材の平坦部を使用するので露光領
域を大きく（長く）とれ原稿を瞬間的に全面露光
でき、高速複写に向いている。 Conventionally, as an image forming apparatus using a belt-shaped photosensitive material, for example, Japanese Patent Laid-Open No. 50-87332 and Japanese Patent Laid-open No. 55
There is one shown in the -52082 publication. In both cases, a charger, exposure section, developing machine,
Transfer devices, etc. were arranged in sequence, and after the belt-shaped sensitive material was charged with a charger, it was imagewise exposed in an exposure section to form an electrostatic latent image, and the electrostatic latent image was developed into a visible image with a developing machine. The image is later transferred to paper using a transfer device, but the exposure section is either placed on the member (roll) that supports the belt-shaped photosensitive material, or is placed between the members that support the belt-shaped photosensitive material. It's different. The former method is on a member with a large curvature, that is, a roll, so the exposure area cannot be made large (long), so the original is scanned with slit light to sequentially form slit-shaped exposed images on the photosensitive material. , only the so-called slit exposure method can be applied, and scanning requires time, making it unsuitable for high-speed copying. On the other hand, the latter method uses a flat portion of a belt-shaped photosensitive material, so the exposure area can be made large (long), and the entire document can be exposed instantly, making it suitable for high-speed copying.
本発明は、後者のように露光領域としてベルト
状感材の平坦部を使用するもの、すなわち画像形
成装置を対象としている。 The present invention is directed to the latter type of image forming apparatus that uses a flat portion of a belt-like photosensitive material as an exposure area, that is, an image forming apparatus.
かかる画像形成装置においては、ベルト状感材
を移動させながら前述の各動作を行なうが、ベル
ト状感材は、プラスチツクフイルム等を支持体と
して用いるためベルト状感材自体に縦方向及び横
方向（巾方向）の波打ちがあり、ベルト状感材の
平坦部を使用するものの、この波打ちは残つてお
り、ベルト状感材が露光部と対向した領域、つま
り露光領域を移動する際にその波打ちがあると、
ベルト状感材に均一に像露光できないので静電潜
像がゆがんでしまつて正しい画像を得ることがで
きない。 In such an image forming apparatus, each of the above-mentioned operations is performed while moving the belt-shaped photosensitive material. However, since the belt-shaped photosensitive material uses a plastic film or the like as a support, the belt-shaped photosensitive material itself has a vertical and horizontal direction ( Although the flat part of the belt-shaped photosensitive material is used, these undulations remain, and when the belt-shaped photosensitive material moves through the area facing the exposed area, that is, the exposed area, the undulations occur. If there,
Since the belt-shaped sensitive material cannot be uniformly exposed to light, the electrostatic latent image is distorted, making it impossible to obtain a correct image.
そこで、前述のベルト状感材の露光領域におい
て波打ちを防止して平面性を得られるようにする
ため、
ベルト状感材の張力を強める。 Therefore, in order to prevent waving and obtain flatness in the exposed area of the belt-shaped sensitive material, the tension of the belt-shaped sensitive material is increased.
ベルト状感材の背面にロールを接触させる。 A roll is brought into contact with the back side of the belt-shaped photosensitive material.
ベルト状感材の背面に平板を当接し、ベルト
状感材が下に垂れ下らないようにする。 A flat plate is brought into contact with the back side of the belt-like photosensitive material to prevent the belt-like photosensitive material from hanging down.
ベルト状感材の背面に、穴のあいた平板を当
接し、この穴より吸引力を与えベルト状感材を
平板に引きつけたり、穴より空気を送つて規定
の無端ベルト平面を保つ。 A flat plate with holes is brought into contact with the back side of the belt-shaped photosensitive material, and suction force is applied through the holes to attract the belt-shaped photosensitive material to the flat plate, and air is sent through the holes to maintain a specified endless belt flatness.
等の手段を用いている。 The following methods are used.
しかし、第一の手段であると、強い張力を与え
るからベルト状感材が切れたりすると共に、張力
を強くしただけでは、巾方向の波打ちを防止でき
ず、ベルト状感材の平面性が充分でない。 However, if the first method is applied, strong tension is applied, which may cause the belt-shaped photosensitive material to break.Also, simply increasing the tension does not prevent waviness in the width direction, and the flatness of the belt-shaped photosensitive material is insufficient. Not.
第２の手段であると、接触領域での波打ちは防
止されるが、この領域が狭く、露光領域として必
要な平面を確保できない。 Although the second method prevents waving in the contact area, this area is narrow and cannot ensure a flat surface necessary for the exposure area.
第３の手段であると、ベルトに張力をかけて
も、それによりベルトを平板に押しつける向きの
力は平板の両サイドの角部にしか作用せず、その
部分での波打ちは防止できるが、その間ではあま
り効果的でない。 With the third method, even if tension is applied to the belt, the force that presses the belt against the flat plate will only act on the corners of both sides of the flat plate, and waving at those parts can be prevented. In between, it is not very effective.
第４の手段であると、吸引、送風のために空気
源を必要とし、コストが高くなると共に、騒音が
発生する。 The fourth method requires an air source for suction and ventilation, increasing costs and generating noise.
等の不具合を有する。 There are other defects.
本発明は上記の事情に鑑みなされたものであ
り、その目的は、ベルト状感材が露光領域を通過
する際には波打ちが防止され、かつ露光領域での
平面性を許容範囲内に保つことができると共に、
コスト安で騒音が発生することがないようにした
画像形成装置を提供するとである。 The present invention was made in view of the above circumstances, and its purpose is to prevent waving when a belt-shaped sensitive material passes through an exposed area, and to maintain flatness in the exposed area within an allowable range. Along with being able to
It is an object of the present invention to provide an image forming apparatus that is inexpensive and does not generate noise.
以下図面を参照して本発明の実施例を説明す
る。 Embodiments of the present invention will be described below with reference to the drawings.
第１図は複写機の概略説明図であり、駆動ロー
ル１と従動ロール２とに亘つてベルト状感材３を
移動自在に張架し、そのベルト状感材３の周囲
に、帯電器４、現像機５、転写器６、除電器７、
クリーナ８を順次配設すると共に、帯電器４と現
像機５の間における所定の長さの領域Ｂが露光領
域となり、この露光領域Ｂにおける上方位置には
レンズ９、プランテン１０等より成る露光部が配
設され、プランテン１０上の原稿像をレンズ９を
通して露光領域Ｂを通過するベルト状感材３に照
射露光することで静電潜像を形成するように構成
してある。 FIG. 1 is a schematic explanatory diagram of a copying machine, in which a belt-shaped sensitive material 3 is movably stretched across a driving roll 1 and a driven roll 2, and a charger 4 is placed around the belt-shaped sensitive material 3. , developing machine 5, transfer machine 6, static eliminator 7,
The cleaners 8 are sequentially disposed, and a region B of a predetermined length between the charger 4 and the developing device 5 becomes an exposure region, and an exposure region consisting of a lens 9, a plantain 10, etc. is provided at an upper position in this exposure region B. The belt-like sensitive material 3 passing through the exposure area B is exposed to the original image on the plantain 10 through the lens 9, thereby forming an electrostatic latent image.
１１を転写器６を通過した転写器紙１２を図示
しない定着器に向けて搬送する搬送ベルトであ
る。 11 is a conveyor belt that conveys the transfer paper 12 that has passed through the transfer device 6 toward a fixing device (not shown).
この様であるから、ベルト状感材３は露光領域
Ｂを通過する際に、波打ち状態であると原稿像が
正しく照射露光されずに静電潜像がゆがんで、正
しい画像が得られない。 Because of this, when the belt-shaped sensitive material 3 passes through the exposure area B, if it is in a wavy state, the original image will not be properly irradiated and exposed, and the electrostatic latent image will be distorted, making it impossible to obtain a correct image.
そこで、露光領域Ｂに凸面プレート２０を配設
し、その凸面２０ａをベルト状感材３の背面３ａ
に押しつけてある。 Therefore, a convex plate 20 is provided in the exposure area B, and its convex surface 20a is used as the back surface 3a of the belt-shaped photosensitive material 3.
It's pressed against me.
該凸面プレート２０は、ベルト状感材３の幅と
同一幅であり、凸面２０ａは所定曲率の円弧面
で、かつ凸面２０ａの高さ（曲率）はベルト状感
材３の許容高さH1（許容最大波打ち）よりも小さ
くすると共に、長さL1は露光領域Ｂの長さ（要
求される領域の長さ）と同一となつている。 The convex plate 20 has the same width as the belt-shaped photosensitive material 3, the convex surface 20a is an arcuate surface with a predetermined curvature, and the height (curvature) of the convex surface 20a is equal to the allowable height H 1 of the belt-shaped photosensitive material 3. (maximum allowable undulation), and the length L1 is the same as the length of the exposure area B (the length of the required area).
しかして、露光領域を通過する際のベルト状感
材３の波打ちは、凸面プレート２０の凸面２０ａ
で拘束されて、その表面形状は凸面２０ａになら
つた形状となる。なお、この時、ベルト状感材３
に適当な張力を与えるとより一層効果的である。 Therefore, the undulation of the belt-shaped photosensitive material 3 when passing through the exposure area is caused by the convex surface 20a of the convex plate 20.
, and its surface shape follows the convex surface 20a. In addition, at this time, the belt-shaped photosensitive material 3
It is even more effective if an appropriate tension is applied to it.
したがつて、ベルト状感材３は露光領域Ｂを通
過する際に、波打ち防止され、要求される平面性
に保たれるので、原稿像を正しく照射露光できる
から正しい画像が得られる。 Therefore, when the belt-shaped photosensitive material 3 passes through the exposure area B, it is prevented from waving and maintained at the required flatness, so that the original image can be exposed correctly and a correct image can be obtained.
ところで、露光領域Ｂの長さ（凸面プレート２
０の長さ）L1、要求されるベルト状感材３の許
容高さH1、凸面２０ａの曲率（半径）Ｒとの関
係は、
Ｒ＝H1 2＋（L1／２）2／2H1
で表わされる。例えば、L1＝124mm、H1＝0.5mm
とした場合の曲率Ｒは3844.25mmとすれば良い。 By the way, the length of the exposure area B (convex plate 2
The relationship between the required allowable height H 1 of the belt-shaped sensitive material 3 and the curvature (radius) R of the convex surface 20a is R=H 1 2 + (L 1 /2) 2 / It is expressed as 2H 1 . For example, L 1 = 124mm, H 1 = 0.5mm
In this case, the curvature R should be 3844.25 mm.
なお、要求されるベルト状感材３の平面性は、
複写機に使用される光学レンズの焦点深度によつ
て異なり、焦点深度が浅い場合は、要求される平
面性がより厳しく（小さく）なる。更に、焦点深
度は、複写機の電力の制約から決められるレンズ
の明るさ（Ｆ値）、または複写機の寸法条件（最
大原稿サイズとレンズの焦点距離で決まる）によ
り決められる画角により異なる。明るいレンズほ
ど焦点深度は浅く、画角が大きいレンズほど焦点
深度は浅くなる。 The required flatness of the belt-shaped photosensitive material 3 is as follows:
It depends on the depth of focus of the optical lens used in the copying machine, and when the depth of focus is shallow, the required flatness becomes stricter (smaller). Furthermore, the depth of focus differs depending on the brightness (F number) of the lens determined by the power constraints of the copying machine, or the angle of view determined by the dimensional conditions of the copying machine (determined by the maximum original size and focal length of the lens). The brighter the lens, the shallower the depth of focus, and the larger the angle of view, the shallower the depth of focus.
また、第３図に示すように、平板２０を弯曲さ
せて凸面２０Ａを形成しても良い。 Alternatively, as shown in FIG. 3, the flat plate 20 may be curved to form a convex surface 20A.
第３図において、２１，２２，２３は平板２０
を弯曲させる第１、第２、第３軸杆であり、第
１、第３軸杆２１、２３を平板２０の両端折曲部
２０ｂ、２０ｂにボルト２４で押しつけ、第２軸
杆２２を平板２０の中間部に押しつけて平板２０
を所定曲率に弯曲させるようにしてある。また、
第４図に示すように、凸面プレート２０に複数の
孔２５を穿孔し、ベルト状感材３の背面３ａとの
接触面積を小さくして、ベルト状感材３の背面３
ａとの接触摩擦力を小さくしても良い。 In FIG. 3, 21, 22, 23 are flat plates 20
The first, second, and third shaft rods are curved, and the first and third shaft rods 21 and 23 are pressed against the bent portions 20b and 20b at both ends of the flat plate 20 with bolts 24, and the second shaft rod 22 is bent into the flat plate. 20, and press it against the middle part of the flat plate 20.
is curved to a predetermined curvature. Also,
As shown in FIG. 4, a plurality of holes 25 are bored in the convex plate 20 to reduce the contact area with the back surface 3a of the belt-like sensitive material 3.
The contact friction force with a may be reduced.
本発明は以上の様になり、ベルト状感材３が露
光領域Ｂに通過する際に凸面プレート２０の凸面
２０ａに背面３ａが摺接するので、ベルト状感材
３の波打ちが防止されて平面性が保たれ、正しく
像露光されて静電潜像を形成できるから正しい画
像が得られる。 In the present invention as described above, when the belt-shaped sensitive material 3 passes through the exposure area B, the back surface 3a comes into sliding contact with the convex surface 20a of the convex plate 20, so that the belt-shaped sensitive material 3 is prevented from waving and has a flat surface. is maintained, and an electrostatic latent image can be formed through correct image exposure, resulting in a correct image.
また、ベルト状感材３の背面３ａに凸面プレー
ト２０を押しつけるだけあるから、コスト安であ
ると共に、騒音が発生することがない。 Further, since the convex plate 20 is simply pressed against the back surface 3a of the belt-shaped photosensitive material 3, the cost is low and no noise is generated.
図面は本発明の実施例を示し、第１図は複写機
の概略説明図、第２図は凸面プレートの拡大正面
図、第３図及び第４図は凸面プレートのそれぞれ
異なる実施例を示す正面図及び斜視図である。
３はベルト状感材、２０は凸面プレート、２０
ａは凸面。
The drawings show embodiments of the present invention; FIG. 1 is a schematic illustration of a copying machine, FIG. 2 is an enlarged front view of a convex plate, and FIGS. 3 and 4 are front views showing different embodiments of the convex plate. FIG. 2 is a diagram and a perspective view. 3 is a belt-shaped sensitive material, 20 is a convex plate, 20
a is convex.
Claims (1)
有するベルト状感材３を移動可能に張架し、その
ベルト状感材３の周囲に帯電器４、露光部、現像
機５、転写器６等を順次配設した画像形成装置に
おいて、 前記露光部と対向する露光領域Ｂを前記ロール
間のベルト状感材３上に設定すると共に、その長
さを露光させる画像長さと略等しく設定し、 幅が前記ベルト状感材３と略等しく、長さL1
が前記露光領域Ｂと等しい凸面プレート２０を、
その凸面２０ａが移動する前記ベルト状感材３の
背面３ａに摺擦されるように押しつけて配設し、
前記凸面２０ａは、前記ベルト状感材３の許容高
さH1と前記露光領域Ｂの長さL1とにより決まる
半径Ｒ＝H1 2＋（L1／２）2／2H1より大きい半径の円弧 面である、 ことを特徴とする画像形成装置。[Claims] 1. A belt-shaped photosensitive material 3 having a predetermined width is movably stretched over at least two rolls, and a charger 4, an exposure section, and a developing device are arranged around the belt-shaped photosensitive material 3. In an image forming apparatus in which a transfer device 5, a transfer device 6, etc. are sequentially arranged, an exposure region B facing the exposure section is set on the belt-shaped sensitive material 3 between the rolls, and its length is set as an image length to be exposed. The width is set to be approximately equal to that of the belt-shaped sensitive material 3, and the length is L1.
is equal to the exposure area B,
The convex surface 20a is placed so as to be pressed against the back surface 3a of the moving belt-shaped photosensitive material 3,
The convex surface 20a has a radius larger than the radius R=H 1 2 + (L 1 /2) 2 /2H 1 determined by the allowable height H 1 of the belt-shaped sensitive material 3 and the length L 1 of the exposure area B. An image forming apparatus characterized in that the surface is an arcuate surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57216965A JPS59107373A (en) | 1982-12-13 | 1982-12-13 | Endless belt carrying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57216965A JPS59107373A (en) | 1982-12-13 | 1982-12-13 | Endless belt carrying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59107373A JPS59107373A (en) | 1984-06-21 |
| JPH0361949B2 true JPH0361949B2 (en) | 1991-09-24 |
Family
ID=16696688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57216965A Granted JPS59107373A (en) | 1982-12-13 | 1982-12-13 | Endless belt carrying device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59107373A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05216382A (en) * | 1992-02-04 | 1993-08-27 | Fuji Xerox Co Ltd | Endless belt carrying device |
| WO2001061418A1 (en) * | 2000-02-16 | 2001-08-23 | Imation Corp. | An electrophotographic imaging system having a support shoe positioned within the laser strike region |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5087332A (en) * | 1973-12-05 | 1975-07-14 |
-
1982
- 1982-12-13 JP JP57216965A patent/JPS59107373A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5087332A (en) * | 1973-12-05 | 1975-07-14 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59107373A (en) | 1984-06-21 |
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