JPH0469675A - Carrying belt driving device for wet electrophotographic copying machine - Google Patents
Carrying belt driving device for wet electrophotographic copying machineInfo
- Publication number
- JPH0469675A JPH0469675A JP2184711A JP18471190A JPH0469675A JP H0469675 A JPH0469675 A JP H0469675A JP 2184711 A JP2184711 A JP 2184711A JP 18471190 A JP18471190 A JP 18471190A JP H0469675 A JPH0469675 A JP H0469675A
- Authority
- JP
- Japan
- Prior art keywords
- conveyor belt
- speed
- belt
- roller
- torque
- 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
- 239000007788 liquid Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 description 9
- 230000003068 static effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Fixing For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
［産業−にの利用分野］
本発明は、液体トナーによって現像された画像出力用紙
を乾燥器へ搬送する、搬送ベルトの駆動装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drive device for a conveyor belt that conveys an image output sheet developed with liquid toner to a dryer.
［従来の技術］
従来、湿式電子写真複写機の乾燥装置は、第２図の様な
構成をしていた。露光ドラム１の−１一方に搬送ベルト
２が、駆動ローラ３と２本のローラ４ａ。[Prior Art] Conventionally, a drying device for a wet-type electrophotographic copying machine has a configuration as shown in FIG. On one side of the exposure drum 1 is a conveyor belt 2, a drive roller 3 and two rollers 4a.
４ｂとにより支持されている。該搬送ベルト２は駆動ロ
ーラ３に接続された搬送ベルＩ・駆動モータ５によって
図中矢印方向に回転可能になっている。4b. The conveyor belt 2 is rotatable in the direction of the arrow in the figure by a conveyor belt I/drive motor 5 connected to a drive roller 3.
該搬送ベルト２の後方には熱定着ローラ６が備えられて
おり、熱定駆動モータ７によって図中矢印方向に回転可
能になっている。搬送ベルト駆動モータ５、及び熱定駆
動モータ７はそれぞれ駆動制御回路８、及び９によって
、搬送ベルｌ−２と熱定着ローラ６とがほぼ同じ速度で
回転される。前記搬送ベルト２の」二方には乾燥ファン
１０か設けられている。A thermal fixing roller 6 is provided behind the conveyor belt 2, and is rotatable in the direction of the arrow in the figure by a constant thermal drive motor 7. The conveyor belt drive motor 5 and the thermal constant drive motor 7 are driven by drive control circuits 8 and 9, respectively, so that the conveyor belt l-2 and the heat fixing roller 6 are rotated at approximately the same speed. A drying fan 10 is provided on both sides of the conveyor belt 2.
前記搬送ベルト２には、回転方向に沿って、駆動ローラ
３の後方に除電器１１が、ローラ４ｂの後方に帯電器１
２が、それぞれ備えられている。The conveyor belt 2 includes a static eliminator 11 behind the drive roller 3 and a charger 1 behind the roller 4b along the rotation direction.
2 are provided respectively.
除電器１１は、グラウンドに、帯電器１２は、高圧電源
１３に、それぞれ接続されている。The static eliminator 11 is connected to the ground, and the charger 12 is connected to the high voltage power supply 13.
次にこの動作を説明すると、露光ドラム１」−に支持さ
れた感光紙２０に画像が露光され、液体１〜ナーにより
現像される。該現像された感光紙２０は図示しない剥削
型によって露光ドラム１」二から剥離される。この時、
搬送ベルト駆動モータ５が回転し、駆動ローラ３により
搬送ベルト２か図中矢印方向に回転を始め、前記感光紙
２０をベルト上に搬送する。この前から、帯電器１２に
は高圧電源１３から１． ｋ ｖ〜３ｋｖの電圧が印加
されており、これによって感光紙２０は搬送ベルｌ−２
にしっかりと静電吸４１′１される。＋ｉｉｊ記感光紙
２０がベルト」二に搬送されると、乾燥ファン１０か回
転し、感光紙２０」二のトナー像を乾燥させる。乾燥終
了後、乾燥ファン１０は停止し、搬送ベルｌ−２と熱定
着ローラ６はそれぞれ搬送ベルト駆動モータ５と熱定駆
動モータ７によって図中矢印方向にほぼ同じ速度で回転
し、前記感光紙２０を複写機外へ排出する。感光紙２０
が排出されたのち、除電器１１は搬送ベル１−Ｊ−の電
荷を除電する。Next, to explain this operation, an image is exposed on the photosensitive paper 20 supported by the exposure drum 1'' and developed with liquids 1 to toner. The developed photosensitive paper 20 is peeled off from the exposure drum 1'' by a peeling die (not shown). At this time,
The conveyor belt drive motor 5 rotates, and the drive roller 3 starts rotating the conveyor belt 2 in the direction of the arrow in the figure, thereby conveying the photosensitive paper 20 onto the belt. From before this, 1. A voltage of kv to 3kv is applied, and the photosensitive paper 20 is moved by the conveyor belt l-2.
It is firmly electrostatically absorbed 41'1. When the photosensitive paper 20 is conveyed to the belt 2, the drying fan 10 rotates to dry the toner image on the photosensitive paper 20. After drying, the drying fan 10 stops, and the conveyor belt l-2 and heat fixing roller 6 are rotated at approximately the same speed in the arrow direction in the figure by the conveyor belt drive motor 5 and the heat constant drive motor 7, respectively, and the photosensitive paper 20 out of the copying machine. Photosensitive paper 20
After the transport bell 1-J- is discharged, the static eliminator 11 eliminates the charge on the conveyor belt 1-J-.
［発明が解決しようとする課題］
しかしながら、搬送ベルトと熱定着ローラとを、完全に
同じ速度で駆動することは非常に勤しく、どちらかが僅
かに速くなってしまう。もし搬送ベルトの方が速ければ
、感光紙にたるみができて画像が周辺のフレーム等に接
触し、画質の低下を招く。また、もし熱定着ローラの方
が速ければ、ローラが画像」二で空回りしてこれも画質
の低下を招く、等の問題点があった。[Problems to be Solved by the Invention] However, it is very difficult to drive the conveyor belt and the heat fixing roller at exactly the same speed, and one of them ends up being slightly faster. If the conveyor belt is faster, the photosensitive paper will sag and the image will come into contact with surrounding frames, resulting in a decrease in image quality. Further, if the heat fixing roller is faster, there is a problem that the roller idles during the image process, which also causes a decrease in image quality.
本発明は、」二連した問題点を解決するためになされた
ものであり、搬送ベルトと熱定着ローラとを、完全に同
じ速度で駆動しなくても、感光紙」二の画像が周辺のフ
レーム等に接触したり、ローラが空回りしたりして、画
像の低下を招くことの無い湿式電子写真複写機の搬送ベ
ルト駆動装置を提供することを目的とする。The present invention was made to solve the two problems, and even if the conveyor belt and the heat fixing roller are not driven at exactly the same speed, the image on the photosensitive paper can be It is an object of the present invention to provide a conveyor belt drive device for a wet-type electrophotographic copying machine that does not cause deterioration of images due to contact with a frame or the like or idle rotation of rollers.
［課題を解決するための手段］
この目的を達成するために、本発明の搬送ベルト駆動装
置には、搬送ベルトの駆動ローラに対する相対速度が前
記画像出力用紙を排出する方向に対して速い場合にはト
ルクを伝達しないが、遅い場合にはトルクを伝達するよ
うなトルク伝達手段と、前記搬送ベルトの移動速度が少
なくとも熱定着ローラより遅い速度に前記搬送ベルトを
制御する速度制御手段と、を備えている。[Means for Solving the Problems] In order to achieve this object, the conveyor belt drive device of the present invention has the following feature: when the relative speed of the conveyor belt with respect to the drive roller is high in the direction in which the image output paper is discharged, includes a torque transmitting means that does not transmit torque but transmits torque when the torque is slow, and a speed control means that controls the conveyor belt so that the moving speed of the conveyor belt is at least slower than that of the heat fixing roller. ing.
［作用］
」二重の構成を有する本発明の搬送ベルト駆動装置にお
いて、トルク伝達手段は、搬送ベルト駆動手段の内部に
設けられ、搬送ベルト駆動手段の速度より搬送ベルトの
方が速い速度で回転しているときには搬送ベルト駆動手
段が発生するトルクを搬送ベルトには伝達させず、搬送
ベルトの方が遅い速度で回転しているときには全てのト
ルクを搬送ベルトに伝達させる。[Function] In the conveyor belt drive device of the present invention having a dual configuration, the torque transmission means is provided inside the conveyor belt drive means, and the conveyor belt rotates at a faster speed than the conveyor belt drive means. When the conveyor belt is rotating at a slower speed, the torque generated by the conveyor belt drive means is not transmitted to the conveyor belt, and when the conveyor belt is rotating at a slower speed, all the torque is transmitted to the conveyor belt.
また、速度制御手段は、前記搬送ベルトの移動速度が、
常に少なくとも熱定着ローラより遅い速度になるように
、搬送ベル］・の速度を制御する。Further, the speed control means is configured such that the moving speed of the conveyor belt is
The speed of the transport bell is controlled so that the speed is always at least slower than that of the heat fixing roller.
［実施例］
以下、本発明を具体化した一実施例を図面を参照して説
明する。[Example] Hereinafter, an example embodying the present invention will be described with reference to the drawings.
第１図は、本実施例の構成図であり、図中１から１２ま
で、及び２０は、従来例を示す第２図と同じなので説明
を省略する。１０１は搬送ベルト駆動モータ５と駆動ロ
ーラ３との間に設けられたワンウェイ・クラッチであり
、搬送ベルト駆動モータ５より駆動ローラ３の方が回転
数が速いときには、トルクの伝達は行なわないが、逆に
搬送ベルト駆動モータ５の方が駆動ローラ３より回転数
が速いときには、搬送ベルト駆動モータ５のトルクを駆
動ローラ３に伝達する。すなわち、本実施例においては
、ワンウェイ・クラッチ１０１がトルク伝達手段を構成
している。FIG. 1 is a block diagram of the present embodiment, and 1 to 12 and 20 in the figure are the same as in FIG. 2 showing the conventional example, so their explanation will be omitted. 101 is a one-way clutch provided between the conveyor belt drive motor 5 and the drive roller 3; when the rotation speed of the drive roller 3 is faster than that of the conveyor belt drive motor 5, no torque is transmitted; Conversely, when the rotation speed of the conveyor belt drive motor 5 is faster than that of the drive roller 3, the torque of the conveyor belt drive motor 5 is transmitted to the drive roller 3. That is, in this embodiment, the one-way clutch 101 constitutes a torque transmission means.
１０２は搬送ベルトの駆動制御回路８と搬送ベルト駆動
モータ５との間に設けられた速度制御回路である。該速
度制御回路１０２には、熱定駆動モータ７と搬送ベルト
駆動モータ５の速度情報が入力されており、熱定駆動モ
ータ７の方が搬送ベルト駆動モータ５より回転数が速い
ときには駆動制御回路８からの信号をそのまま搬送ベル
ト駆動モータ５に伝達するが、もし熱定駆動モータ７の
方が搬送ベルト駆動モータ５より回転数が遅いときには
搬送ベルト駆動モータ５に減速信弓を伝達する。すなわ
ち、本実施例においては、速度制御回路１０２が速度制
御手段を構成している。102 is a speed control circuit provided between the conveyor belt drive control circuit 8 and the conveyor belt drive motor 5. Speed information of the thermal constant drive motor 7 and the conveyor belt drive motor 5 is input to the speed control circuit 102, and when the rotation speed of the thermal constant drive motor 7 is faster than the conveyor belt drive motor 5, the drive control circuit 102 The signal from 8 is directly transmitted to the conveyor belt drive motor 5, but if the rotation speed of the thermally constant drive motor 7 is lower than that of the conveyor belt drive motor 5, a deceleration signal is transmitted to the conveyor belt drive motor 5. That is, in this embodiment, the speed control circuit 102 constitutes speed control means.
次に、本実施例の動作を説明する。Next, the operation of this embodiment will be explained.
従来例と同様にして液体トナーにより現像された感光紙
２０は図示［、ない剥離爪によって露光ドラム１上から
剥削され搬送ベルト上に搬送され、乾燥ファン１０によ
って感光紙２０上の）・ナー像は乾燥される。乾燥終了
後、乾燥ファン１０は停止し、搬送ベルト２と熱定着ロ
ーラ６はそれぞれ搬送ベルト駆動モータ５と熱定駆動モ
ータ７によって図中矢印方向にほぼ同じ速度で回転を始
めるが、速度制御回路１０２により、常に搬送ベルト駆
動モータ５の方が遅くなるように制御されている。この
時は、搬送ベルｌ−２には他に力が加わっていないので
、ワンウェイ・クラッチ１０１はトルクを伝達する。乾
燥したトナー像を載せた感光紙２０は、搬送ベルト２に
よって熱定着ローラ６に搬送され、該ローラ６の間には
さまれて排出される。この時、熱定着ローラ６は、常に
搬送ベルＩ・より速い速度で回転しているので、感光紙
２０は搬送ベルト２の速度から、熱定着ローラ６の速度
へ加速する。これにより搬送ベルト２も熱定着ローラ６
の速度に引っ張られ、ワンウェイ・クラッチ１０１は空
転する。感光紙２０が、熱定着ローラ６を通り過ぎると
、搬送ベルｉ−２と熱定着ローラ６はともに停止し、湿
式複写機の乾燥行程を終了する。The photosensitive paper 20 developed with liquid toner in the same manner as in the conventional example is peeled off from the exposure drum 1 by a peeling claw and conveyed onto a conveyor belt, and a toner image is formed on the photosensitive paper 20 by a drying fan 10. is dried. After drying is completed, the drying fan 10 stops, and the conveyor belt 2 and thermal fixing roller 6 start rotating at approximately the same speed in the direction of the arrow in the figure by the conveyor belt drive motor 5 and thermal constant drive motor 7, respectively. 102, the conveyor belt drive motor 5 is controlled so that it is always slower. At this time, since no other force is applied to the conveyor bell l-2, the one-way clutch 101 transmits torque. The photosensitive paper 20 carrying the dried toner image is conveyed by the conveyor belt 2 to a heat fixing roller 6, and is then sandwiched between the rollers 6 and discharged. At this time, since the thermal fixing roller 6 is always rotating at a faster speed than the conveyor belt I, the photosensitive paper 20 is accelerated from the speed of the conveyor belt 2 to the speed of the thermal fixing roller 6. As a result, the conveyor belt 2 and the heat fixing roller 6
, and the one-way clutch 101 spins idle. When the photosensitive paper 20 passes the heat fixing roller 6, both the conveyance bell i-2 and the heat fixing roller 6 stop, and the drying process of the wet type copying machine is completed.
［発明の効果］
以」二詳述したことから明らかなように、本発明によれ
ば、搬送ベルトと熱定着ローラとを、完全に同じ速度で
駆動しなくても、感光紙上の画像が周辺のフレーム等に
接触したり、ローラが画像」二で空回りしたりする事を
防ぎ、画像の低下を招かないようにすることができる。[Effects of the Invention] As is clear from what has been described in detail below, according to the present invention, even if the conveyor belt and the heat fixing roller are not driven at exactly the same speed, the image on the photosensitive paper can be It is possible to prevent the roller from coming into contact with the frame, etc., or from rotating idly while the image is being displayed, thereby preventing deterioration of the image.
第１図は本発明を具体化した実施例を示すもので、第１
図はその構成図である。また、第２図は従来例を示す構
成図である。
図中、］０１はワンウェイ・クラッチ、１０２は速度制
御回路である。FIG. 1 shows an embodiment embodying the present invention.
The figure shows its configuration. Further, FIG. 2 is a configuration diagram showing a conventional example. In the figure, ]01 is a one-way clutch, and 102 is a speed control circuit.
Claims (1)
燥器へ搬送する搬送ベルトの駆動装置において、 搬送ベルトが、前記画像出力用紙を排出する方向に回転
しようとするときにはトルクを伝達するが、逆方向に回
転しようとするときにはトルクを伝達しないような、ト
ルク伝達手段と、 前記搬送ベルトの移動速度が、少なくとも熱定着ローラ
より遅い速度に前記搬送ベルトを制御する、速度制御手
段と、 を備えたことを特徴とする、湿式電子写真複写機の搬送
ベルト駆動装置[Claims] 1. In a drive device for a conveyor belt that conveys an image output sheet developed with liquid toner to a dryer, when the conveyor belt attempts to rotate in a direction to discharge the image output sheet, a torque is generated. a torque transmitting means that transmits torque but does not transmit torque when attempting to rotate in the opposite direction; and a speed control that controls the conveyor belt so that the moving speed of the conveyor belt is at least slower than that of the heat fixing roller. A conveyor belt drive device for a wet-type electrophotographic copying machine, characterized by comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2184711A JPH0469675A (en) | 1990-07-10 | 1990-07-10 | Carrying belt driving device for wet electrophotographic copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2184711A JPH0469675A (en) | 1990-07-10 | 1990-07-10 | Carrying belt driving device for wet electrophotographic copying machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0469675A true JPH0469675A (en) | 1992-03-04 |
Family
ID=16158032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2184711A Pending JPH0469675A (en) | 1990-07-10 | 1990-07-10 | Carrying belt driving device for wet electrophotographic copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0469675A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5402074A (en) * | 1993-05-13 | 1995-03-28 | Seagate Technology, Inc. | Thin film magnetic head having electrical connection to core |
| JPH10171174A (en) * | 1996-12-11 | 1998-06-26 | Konica Corp | Both side image forming device |
-
1990
- 1990-07-10 JP JP2184711A patent/JPH0469675A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5402074A (en) * | 1993-05-13 | 1995-03-28 | Seagate Technology, Inc. | Thin film magnetic head having electrical connection to core |
| JPH10171174A (en) * | 1996-12-11 | 1998-06-26 | Konica Corp | Both side image forming device |
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