JPS61167959A - Dew condensation preventing device of electronic copying machine - Google Patents
Dew condensation preventing device of electronic copying machineInfo
- Publication number
- JPS61167959A JPS61167959A JP60008347A JP834785A JPS61167959A JP S61167959 A JPS61167959 A JP S61167959A JP 60008347 A JP60008347 A JP 60008347A JP 834785 A JP834785 A JP 834785A JP S61167959 A JPS61167959 A JP S61167959A
- Authority
- JP
- Japan
- Prior art keywords
- filter
- dew condensation
- copying machine
- temperature
- heater
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/20—Humidity or temperature control also ozone evacuation; Internal apparatus environment control
- G03G21/206—Conducting air through the machine, e.g. for cooling, filtering, removing gases like ozone
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
- G03G21/20—Humidity or temperature control also ozone evacuation; Internal apparatus environment control
- G03G21/203—Humidity
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Atmospheric Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、複写機等の結露防止装置に関するもので、
特に電子写真複写機に用いて好適な結露防止装置に関す
るものである。[Detailed Description of the Invention] Industrial Application Field This invention relates to a dew condensation prevention device for copying machines, etc.
In particular, the present invention relates to a dew condensation prevention device suitable for use in electrophotographic copying machines.
従来の技術
一般に電子複写機などでは、特に冬季の朝、室温の急上
昇にともない感光体ドラム表面に結露を生じることがあ
る。2. Description of the Related Art Generally, in electronic copying machines and the like, dew condensation may occur on the surface of the photoreceptor drum as the room temperature rises rapidly, especially in the mornings in winter.
感光体ドラム表面に結露が生じると、その箇所が帯電不
良となっていわゆる白ぬけ画像を生じてしまう。その他
電子複写機では感光ドラム以外の部分、例えばレンズや
ミラーや紙搬送系等の部分も結露によシ障害を生じる部
分がいろいろとあり、このような結露は大気中に含まれ
ている水蒸気が、冷却されて凝結するために生じるもの
であるから、感光体、ドラム等機器の表面温度が機内温
度（室温）に較べて低い場合に発生するものである。When dew condensation occurs on the surface of the photoreceptor drum, charging failure occurs at that location, resulting in a so-called white-out image. In electronic copying machines, there are various parts other than the photosensitive drum, such as lenses, mirrors, and paper transport systems, that can cause problems due to condensation. Such condensation is caused by water vapor contained in the atmosphere. This occurs due to cooling and condensation, so it occurs when the surface temperature of equipment such as photoreceptors and drums is lower than the internal temperature (room temperature).
そこで従来より感光体ドラムをはじめ、結露を生じては
ならない機器全保温ヒータによって加熱してその表面温
度を一定に保つようにすること轄既に知られている。Therefore, it has been known to heat all the equipment, including the photoreceptor drum, which should not cause dew condensation, using a heat-retaining heater to keep the surface temperature constant.
しかし乍ら複写機の電源スィッチが投入されてコピーを
行っている定常の使用伏動や、コピーｔ−行なっていな
め待機状態では、一般にこのような温度差は生じていな
いので、従来は例えば特開昭５８−７２１６０号公報に
記載のように、ヒータへの通電がサーモスタツ）ｔ−介
して設定温度以下で行なえるような方式にしていた。However, such a temperature difference does not generally occur during normal use, when the copying machine is turned on and copying, or when it is in standby mode after copying. As described in Japanese Patent Publication No. 58-72160, a system was adopted in which electricity could be supplied to the heater at a temperature below a set temperature via a thermostat.
発明が解決しようとする問題点
前述し九ような方式では、複写機を使用していない夜間
に、長時間にわたり感光体ドラムを加熱し続けることに
なるため、新たな障害が生じる。すなわち夜間、時間の
経過と共に気温が下り続けると、相対的に湿度は飽和状
聾に近づき、湿度が高くなることはよく知られているこ
とである。このような雰囲気中において、第３図に示し
たように、感光体ドラム１の近傍に配設した面状保温ヒ
ータ２全駆動し発熱させた場合、該ヒータ２の上方の雰
囲気が温められて他の雰囲気より暖かくなり、上昇しつ
つ、未だ温まりきらない感光体ドラム１の下部表面にあ
たり、軽い結露状態を生じることがおる。Problems to be Solved by the Invention In the above-mentioned system, a new problem arises because the photosensitive drum continues to be heated for a long time at night when the copying machine is not in use. That is, it is well known that at night, as the temperature continues to drop as time passes, the relative humidity approaches a saturation point and becomes high. In such an atmosphere, as shown in FIG. 3, when the planar heat-retaining heater 2 disposed near the photoreceptor drum 1 is fully driven to generate heat, the atmosphere above the heater 2 is heated. The atmosphere becomes warmer than other atmospheres, and as it rises, light condensation may occur on the lower surface of the photoreceptor drum 1 that has not yet warmed up.
このようにして夜間の間、この状態が持続すると、感光
体ドラム１の他の部分は、上記ヒータ２の発熱効果のた
めに一定の温度を保ち正常であるが、ドラム下部の湿っ
た温かい気流が当る範囲だけは、保温効果が遮られ、結
露状態が続くことになるので、朝一番のコピーは、この
ドラム下部に対応する部分が狭く、白く抜けた画像とな
ることは免れないという問題点がいぜんとして存するも
のである。When this state continues during the night, the other parts of the photoreceptor drum 1 maintain a constant temperature due to the heat generation effect of the heater 2 and are normal, but the humid and warm air at the bottom of the drum The heat retention effect is blocked and dew condensation continues in the area that is in contact with the drum, so when copying the first thing in the morning, the area corresponding to the bottom of the drum is narrow and it is inevitable that the image will be white. It still exists.
問題点を解決するための手段及び作用
上記問題点を解決するために、この発明においては、感
光体ドラムとその近傍下部に設けられたヒータとの間に
、吸湿性を有し且つ雰囲気の通過性を有する材質のフィ
ルタを配設すると共に、該フィルタをヒータ上面で移動
させる切換手段を設けて夜間中はヒータの発熱による湿
った空気はフィルタを介して感光体ドラムにあたってヒ
ータの保温効果金保つと共に吸湿されドラム下部の結露
を防止し、早朝電源スィッチをオンにするときはフィル
タを移動させて感光体ドラムに対するヒータの保温効果
を直接的としてヒータ効果を高めるようにしたものであ
る。Means and Function for Solving the Problems In order to solve the above problems, in the present invention, there is provided a structure that has hygroscopicity and allows the passage of atmosphere between the photoreceptor drum and the heater provided near and below the photoreceptor drum. In addition to disposing a filter made of a material that has properties of heat, a switching means is provided to move the filter on the top surface of the heater.During the night, moist air generated by the heat generated by the heater hits the photoreceptor drum through the filter, thereby maintaining the heat retention effect of the heater. At the same time, moisture is absorbed to prevent dew condensation at the bottom of the drum, and when the power switch is turned on in the early morning, the filter is moved to directly apply the heat retaining effect of the heater to the photosensitive drum, thereby increasing the heater effect.
実 施 例 この発明の！！施例を図面に基いて説明する。Example This invention! ! An example will be explained based on the drawings.
第３図において、１は像担持体として静電潜像を形成す
る感光体ドラムで、その醐囲には該感光体ドラム１を一
様に帯電する帯電チャージ４、レンズ１６をとおして導
かれてくる原稿光像を感光体ドラム１に照射して静電潜
像を形成するスリット露光部５、トナーによりこの潜像
ｆｏｉｉ視化する現ｇｌ装置６、用紙給紙部１５から搬
送された用紙に感光体ドラム１上のトナー像を転写する
転写チャージャ７、感光体ドラムｌから用紙を分離爪９
０作用と共に剥離する剥離チャージャ８、感光体を再使
用に供するためのクリーニング装置１０、除電チャージ
ャ１１などが設けられている。In FIG. 3, reference numeral 1 denotes a photoreceptor drum that forms an electrostatic latent image as an image carrier, surrounded by a charging charge 4 that uniformly charges the photoreceptor drum 1, which is guided through a lens 16. A slit exposure unit 5 that irradiates the photoreceptor drum 1 with a light image of an incoming original to form an electrostatic latent image, a developing device 6 that visualizes this latent image with toner, and a paper conveyed from the paper feed unit 15. A transfer charger 7 transfers the toner image on the photoreceptor drum 1 to the photoreceptor drum 1, and a claw 9 separates the paper from the photoreceptor drum l.
A peeling charger 8 that peels off the photoreceptor with zero action, a cleaning device 10 for reusing the photoreceptor, a static elimination charger 11, and the like are provided.
また用紙は搬送装置１２から定着装置１３を経て機外の
排出トレイ１４に排出される。以上の構成は従来の電子
複写機と同様であるのでその詳細な動作説明を省略する
。Further, the paper is discharged from the conveyance device 12 via the fixing device 13 to a discharge tray 14 outside the machine. Since the above configuration is similar to that of a conventional electronic copying machine, a detailed explanation of its operation will be omitted.
２は面状保温ヒータで、感光体ドラム１を保温するため
に該ドラム１の下部に配設されている。この発明では第
１図に示すように、面状保温ヒータ２の上部には、例え
ば第２図に示したような適当な目の粗さの不織布を材質
とし九フィルタ３′が上記ドラム１の長さか又はそれ以
上の長さでブラケット３″に貼付けて配置されている。Reference numeral 2 denotes a planar heat-retaining heater, which is disposed below the photoreceptor drum 1 to keep it warm. In this invention, as shown in FIG. 1, a filter 3' made of a non-woven fabric with an appropriate mesh size as shown in FIG. or a longer length, and is attached to the bracket 3''.
このブラケット３″は、ドラムの長さ方向く打ち抜いて
形成され、不織布のフィルタ３′ヲとおしである程度の
空気の透過性をもたせてあり、且つ第１図に示すように
ソレノイド１７の先端に固着されていると共に、ソレノ
イド１７の一部に一端が係止されたスプリング１８の他
端に係止されている。This bracket 3'' is formed by punching in the length direction of the drum, has a certain degree of air permeability through the non-woven fabric filter 3', and is fixed to the tip of the solenoid 17 as shown in FIG. At the same time, one end of the spring 18 is locked to a part of the solenoid 17, and the other end of the spring 18 is locked to a part of the solenoid 17.
このようにしてスズリング；８とソレノイド１７により
フィルタ３′は移動が切換えられるものであり、すなわ
ちフィルタ３′は水平方向に移動できる習性を与えられ
、複写機の電源スィッチがオンの状態では第１図の実線
位置にあり、オフの状態にすると点線位置に移動する。In this way, the movement of the filter 3' is switched by the tin ring 8 and the solenoid 17, that is, the filter 3' is given the habit of being able to move in the horizontal direction, and when the power switch of the copying machine is on, the filter 3' is moved in the first position. It is located at the solid line position in the figure, and moves to the dotted line position when turned off.
つぎにこの装置の作用を説明する。Next, the operation of this device will be explained.
夜間中はフィルタ３′は点線位置に置かれ、面状保温ヒ
ータ２の発熱による湿った温かい空気はフィルタ３′ヲ
通過する際に吸湿され、前述したように感光体ドラム１
の部分的な結露１９ｔ−防止する。但し感光体ドラム１
けフィルタ３′ヲ介することでその温度は若干域じるが
、室内温度よりもはるかに機内温度が高いので結露を生
じることはない。During the night, the filter 3' is placed at the position indicated by the dotted line, and the moist, warm air generated by the heat generated by the sheet heater 2 absorbs moisture as it passes through the filter 3', and the photoreceptor drum 1 is heated as described above.
19t - Prevent partial condensation. However, photoreceptor drum 1
Although the temperature is slightly increased by passing through the filter 3', condensation does not occur because the temperature inside the machine is much higher than the room temperature.
いま早朝時に電源スィッチをオンにすると、フィルタ３
′は実線位置に移動し、面状保温ヒータ２の保温効果は
直接的になシ、また複写機の他の部分の発熱機器、例え
ば定着装置への通電も同時に行なわれるので、複写機内
の温度は飛躍的に高まるものである。このようにして室
内雰囲気の暖房の使用による急激な高まりによって常に
機内温度を一定以上維持することになり結露状態の発生
を防ぐことができる。When I turn on the power switch early in the morning, filter 3
' moves to the solid line position, and the heat retention effect of the planar heater 2 is no longer directly maintained, and power is also supplied to other parts of the copying machine, such as the fixing device, at the same time, so the temperature inside the copying machine decreases. will increase dramatically. In this way, the temperature inside the machine is always maintained above a certain level due to the sudden increase in the indoor atmosphere due to the use of heating, thereby preventing the occurrence of dew condensation.
なお電源スィッチをオンにするのが、暖房使用よりも早
すぎると、湿った暖かい空気が感光体ドラム１にあ九る
ので軽微な結ｇｔ−生じるが、機内温度の高まシと室温
の上昇による相対湿度の低下によって、この最初にでき
たくもり（結露）は乾燥して消失するので特に問題とは
ならないことはいうまでもない。Note that if you turn on the power switch too soon before turning on the heater, warm, humid air will accumulate on the photoreceptor drum 1, causing slight condensation, but this will cause the internal temperature of the machine to rise and the room temperature to rise. It goes without saying that this initial cloudiness (condensation) dries and disappears as the relative humidity decreases, so it is not a particular problem.
また上記実施例ではフィルタ３′の材料として不織布を
用いたが、他の材料でもよく、不織布の内部にヤシガラ
活性炭を混入させたものは効果がすぐれている。またフ
ィルタ３′の移動手段としては、上記水平移動に限らず
、回転、垂直等の他の移動手段音用いてもよい。Further, in the above embodiment, a non-woven fabric was used as the material for the filter 3', but other materials may be used, and a non-woven fabric with coconut shell activated carbon mixed therein is highly effective. Further, the means for moving the filter 3' is not limited to the above-mentioned horizontal movement, but other moving means such as rotation, vertical movement, etc. may be used.
発明の効果
この発明は、以上詳述Ｌ７たように、感光体ドラムの近
傍下部に設けたヒータと感光体ドラムとの間に、吸湿性
を持ちかつ雰囲気の通過性を有する材質のフィルタを配
設してヒータの保温効果を保つと共に、吸湿してドラム
下部の結露防止を行うようにしであるので、夜間におけ
るヒータの保温作用によって感光体ドラムに部分的な結
嘉ヲ生じるのを防止することができるので、部分的な白
抜き画像の発生をなくし、常に良好で安定した画像を保
つことができる。Effects of the Invention As described above in detail L7, the present invention provides a filter made of a material that is hygroscopic and allows the atmosphere to pass through between the heater provided near and below the photoreceptor drum and the photoreceptor drum. The heat insulating effect of the heater is maintained, and moisture is absorbed to prevent condensation at the bottom of the drum, thereby preventing local condensation from forming on the photoreceptor drum due to the heat insulating effect of the heater at night. As a result, it is possible to eliminate the occurrence of partial white-out images and to maintain a good and stable image at all times.
さらにまた複写機の電源をオンにした定常便用の状態に
おいては、フィルタはヒータ上面から移動することによ
り、ヒータ効果を一層高めることができるものである。Furthermore, when the copier is turned on and is used for regular use, the filter can be moved from the top of the heater to further enhance the heater effect.
第１図はこの発明に係る電子複写機の結露防止装置の要
部概略図、第２図はこの発明の結露防止装置に用いるフ
ィルタとブラケットの部分概略図、第３図は従来装置並
びにこの発明に共通な電子複写機の内部構成を示す概略
図である。
１・・・感光体ドラム、２・・・面状保温ヒータ、３′
・・・フィルタ、３“・・・ブラケット、１７・・・ソ
レノイド、１８・・・スプリング。FIG. 1 is a schematic diagram of the main parts of the dew condensation prevention device for an electronic copying machine according to the present invention, FIG. 2 is a partial schematic diagram of a filter and bracket used in the dew condensation prevention device of the present invention, and FIG. 3 is a diagram showing the conventional device and the present invention. 1 is a schematic diagram showing the internal configuration of an electronic copying machine common to the above. 1... Photosensitive drum, 2... Planar heat retention heater, 3'
...Filter, 3"...Bracket, 17...Solenoid, 18...Spring.
Claims (1)
装置を有する電子複写機において、感光体ドラムと保温
ヒータとの中間に吸湿効果のあるフイルタを設置すると
共に、該フイルタを移動させる切換手段を設けたことを
特徴とする電子複写機の結露防止装置。In an electronic copying machine having a dew condensation prevention device including a heat-retaining heater near the photoreceptor drum, a filter having a moisture absorption effect is installed between the photoreceptor drum and the heat-retaining heater, and a switching means for moving the filter is provided. A dew condensation prevention device for an electronic copying machine, characterized in that it is provided with a dew condensation prevention device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60008347A JPS61167959A (en) | 1985-01-22 | 1985-01-22 | Dew condensation preventing device of electronic copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60008347A JPS61167959A (en) | 1985-01-22 | 1985-01-22 | Dew condensation preventing device of electronic copying machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61167959A true JPS61167959A (en) | 1986-07-29 |
| JPH0466354B2 JPH0466354B2 (en) | 1992-10-22 |
Family
ID=11690684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60008347A Granted JPS61167959A (en) | 1985-01-22 | 1985-01-22 | Dew condensation preventing device of electronic copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61167959A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4939549A (en) * | 1988-07-11 | 1990-07-03 | Mita Industrial Co., Ltd. | Image forming apparatus with temperature controlling shield |
| CN103995447A (en) * | 2013-02-15 | 2014-08-20 | 京瓷办公信息***株式会社 | Image forming device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5635147A (en) * | 1979-08-31 | 1981-04-07 | Konishiroku Photo Ind Co Ltd | Electrostatic copier |
| JPS57186761A (en) * | 1981-05-13 | 1982-11-17 | Konishiroku Photo Ind Co Ltd | Heat insulating member for copying machine |
| JPS6011079A (en) * | 1983-06-29 | 1985-01-21 | 富士ゼロックス株式会社 | Moisture-resistant device for copier, etc. |
-
1985
- 1985-01-22 JP JP60008347A patent/JPS61167959A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5635147A (en) * | 1979-08-31 | 1981-04-07 | Konishiroku Photo Ind Co Ltd | Electrostatic copier |
| JPS57186761A (en) * | 1981-05-13 | 1982-11-17 | Konishiroku Photo Ind Co Ltd | Heat insulating member for copying machine |
| JPS6011079A (en) * | 1983-06-29 | 1985-01-21 | 富士ゼロックス株式会社 | Moisture-resistant device for copier, etc. |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4939549A (en) * | 1988-07-11 | 1990-07-03 | Mita Industrial Co., Ltd. | Image forming apparatus with temperature controlling shield |
| CN103995447A (en) * | 2013-02-15 | 2014-08-20 | 京瓷办公信息***株式会社 | Image forming device |
| JP2014157218A (en) * | 2013-02-15 | 2014-08-28 | Kyocera Document Solutions Inc | Image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0466354B2 (en) | 1992-10-22 |
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