JPS63184774A - Device for cooling developing part - Google Patents
Device for cooling developing partInfo
- Publication number
- JPS63184774A JPS63184774A JP62016245A JP1624587A JPS63184774A JP S63184774 A JPS63184774 A JP S63184774A JP 62016245 A JP62016245 A JP 62016245A JP 1624587 A JP1624587 A JP 1624587A JP S63184774 A JPS63184774 A JP S63184774A
- Authority
- JP
- Japan
- Prior art keywords
- housing
- guiding member
- developing section
- toner
- developing
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 26
- 239000004020 conductor Substances 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 3
- 229920003002 synthetic resin Polymers 0.000 abstract description 2
- 239000000057 synthetic resin Substances 0.000 abstract description 2
- 230000020169 heat generation Effects 0.000 abstract 2
- 108091008695 photoreceptors Proteins 0.000 description 7
- 238000007789 sealing Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Magnetic Brush Developing In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
Description
【発明の詳細な説明】
技術分野
本発明は磁気ブラシ式現像を行なう静電記録装置の現像
部の冷却装置に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a cooling device for a developing section of an electrostatic recording apparatus that performs magnetic brush development.
従来技術
磁気ブラシ式現像を行なう静電プリンタ、電子写真複写
機等の静電記録装置の現像部では、第５図に示す如く、
ハウジング内に攪拌部材２ｔ−設け、トナーとキャリア
から成る二成分現像剤を充分攪拌するようにしているの
で、摩擦により発熱する。Conventional technology In the developing section of an electrostatic recording device such as an electrostatic printer or an electrophotographic copying machine that performs magnetic brush development, as shown in FIG.
Since a stirring member 2t is provided inside the housing to sufficiently stir the two-component developer consisting of toner and carrier, heat is generated due to friction.
この熱が現像部内にこもると、現像中のキャリアが軟化
（溶融し始めの状Ｍ）しはじめ、軸受は等に入り込みロ
ックされるいわゆるトナーフィルミングが発生する場合
がある０又、現像部の発熱が感光体３の温度を上昇させ
、感光体の電位を変化させる等の不具合を生じさせる場
合もある。これらの不具合を回避するため、従来より現
像部を冷却することが行なわれているが、従来一般に実
施されている冷却方法は、現像部のハウジング１を熱伝
達率の高′い材料゛で作、リヘファン４によりその表面
に送風して冷却を行なっていた０しかし、スペースの関
係上発熱部である攪拌部材の近傍にファンを配置できな
い場合が多く、離れた箇所にファン４１ｒ：設け、外気
を取入れ、冷却部迄風を誘導する風路を構造部材５によ
り設けていたがスペースの関係で広い風路をとることは
困難であり、通風時の圧力損失が大きくなり、必要な冷
却効果を得るにはファンの容量を大きくすることを余儀
なくされ高価゛につく欠点があった。If this heat accumulates in the developing section, the carrier being developed will begin to soften (to the state where it begins to melt), and the bearings may get stuck and become locked, resulting in so-called toner filming. The heat generated may raise the temperature of the photoreceptor 3, causing problems such as changing the potential of the photoreceptor. In order to avoid these problems, the developing section has traditionally been cooled, but the conventional cooling method generally involves making the housing 1 of the developing section from a material with a high heat transfer coefficient. However, due to space limitations, it is often not possible to place a fan near the stirring member, which is the heat generating part, and a fan 41r is installed at a distant location to cool the surface. An air path was provided using the structural member 5 to guide the air to the intake and cooling section, but it was difficult to create a wide air path due to space constraints, and the pressure loss during ventilation was large, making it difficult to obtain the necessary cooling effect. had the disadvantage that it required a larger fan capacity and was expensive.
目 的
本発明は１磁気ブラシ式現像部の従来の冷却装置の上記
の欠点を除去した効率の良い冷却装置を提供することを
目的とする。OBJECTS It is an object of the present invention to provide an efficient cooling device that eliminates the above-mentioned drawbacks of the conventional cooling device for a single magnetic brush type developing section.
構 成
本発明は、上記の目的を達成させるため１上記構成の現
像部ハウジングに一方の端部が接し、他方の端部が冷却
用ファンの排気口近傍に配置された熱伝導性材料より成
るカード部材を設けたことを特徴とする。Structure: In order to achieve the above objects, the present invention provides a card made of a thermally conductive material, one end of which is in contact with the developer housing having the above structure, and the other end of which is disposed near the exhaust port of a cooling fan. It is characterized by the provision of a member.
以下、本発明の実施例を図面に基づいて詳細に説明する
。Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図は、本発明を先に第５図により説明した現像部の
冷却装置に適用した実施例を示す図である。したがって
同一の部材には同一の符号を付して説明する。FIG. 1 is a diagram showing an embodiment in which the present invention is applied to the cooling device for the developing section previously explained with reference to FIG. 5. Therefore, the same members will be described with the same reference numerals.
本実施例の装置では、現像部の現像剤攪拌部材２、現像
ローラ６を内蔵するハウジング１はアルミニウム合金で
作られているが、現像部ノ１ウジング１内の現像剤にト
ナーを補給するためのトナー補給部７のケーシング８．
９は合成樹脂で作られている。トナー補給部７は特に発
熱しない。現像部ハウジングｌの外面には鉄板製のカー
ド部材１０の一端部が面接触するように固着されており
１カード部材１０は上記のトナー補給部９のケーシング
８の下部及び側部に沿って冷却ファン４の排気側に対向
する位置迄延びている。これ以外の構成は第５図に示し
た従来の装置と異るところはない。In the apparatus of this embodiment, the housing 1 containing the developer stirring member 2 and the developing roller 6 in the developing section is made of aluminum alloy. The casing 8 of the toner supply section 7.
9 is made of synthetic resin. The toner supply section 7 does not particularly generate heat. One end of a card member 10 made of an iron plate is fixed to the outer surface of the developing unit housing l so as to make surface contact with the outer surface of the developing unit housing l. It extends to a position facing the exhaust side of the fan 4. Other than this, the configuration is the same as the conventional device shown in FIG.
この装置は以上の如く構成てれているので＼冷却ファン
４より排出された冷却風は、鉄板製のカード部材１０と
構造用部材５との間に形成される送風路を流れ、これに
より現像部での発熱は熱伝導性材料で作られたハウジン
グ１、カード部材１０に伝導され、カード部材１０の送
風路に向いた広い面より送風路を流れる風に伝達され、
現像部は冷却される。Since this device is constructed as described above, the cooling air discharged from the cooling fan 4 flows through the air passage formed between the card member 10 made of iron plate and the structural member 5, thereby allowing the developing The heat generated in the area is conducted to the housing 1 and the card member 10 made of a thermally conductive material, and is transmitted to the wind flowing through the air passage from the wide surface of the card member 10 facing the air passage.
The developing section is cooled.
なお、この実施例では現像部ハウジングの下部は直接冷
却風の流路に面しているので、ハウジング１は直接冷却
風に・二２に効率よく冷却される。In this embodiment, since the lower part of the developing unit housing directly faces the flow path of the cooling air, the housing 1 is efficiently cooled directly by the cooling air.
実測した結果によれば、この構造により同一の冷却ファ
ンを使用して従来より約８ｃ現像部の温度を低下させる
ことができた。換言すれば、現像部の温度を同じだけ低
下させるには従来よりも小型で安価なファンを使用する
ことができる。According to the results of actual measurements, this structure made it possible to lower the temperature of the developing section by about 8C compared to the conventional method using the same cooling fan. In other words, a fan smaller and cheaper than the conventional fan can be used to lower the temperature of the developing section by the same amount.
ところで、感光体ドラム３に沿って、その回転方向に現
像部の上流側には第２図に示す如くイレーザ１１が設け
られ、又画像濃度調整のため現像部の下流側に画像濃度
センサ１２を設けることが行なわれている。その場合、
現像部冷却ファン４を前記の位置に設けた場合は、機器
の配置及び間隙が第２図に示すようなものであれば、冷
却ファン４の排気口から排出される冷却風は、第２図に
連続した複数個の矢印で示すように、前記のカード部材
１０に沿って現像部の下方を流れるＥで示す風とトナー
補給部７及び現像部の上方を経てイレーザ１１の下部に
至るＤで示す風になる。Incidentally, as shown in FIG. 2, an eraser 11 is provided along the photosensitive drum 3 on the upstream side of the developing section in the direction of rotation thereof, and an image density sensor 12 is provided on the downstream side of the developing section for image density adjustment. It is being established. In that case,
When the developing section cooling fan 4 is installed in the above position, if the equipment arrangement and gaps are as shown in Figure 2, the cooling air discharged from the exhaust port of the cooling fan 4 will be as shown in Figure 2. As shown by a plurality of consecutive arrows, the wind shown as E flows along the card member 10 below the developing section, and the wind shown as D flows above the toner replenishing section 7 and the developing section to reach the lower part of the eraser 11. It becomes a wind that shows.
感光体の回りには、感光体自体の回転や帯電チャージャ
１３のワイヤ汚れ防止のため、作像時には図示せぬ手段
により矢印Ｇで示す方向に流れた後イレーザ１１の下部
と現像部の間より抜ける風が流されている。そこで、前
述の如くイレーザ１１の下部に風りが流れ込むと、風Ｇ
はイレーザ１１と感光体３の間で停滞して、風り中に含
まれているトナーがイレーザ１１の表面に付着し、光量
が低下する０又、風Ｅは、現像部と画像濃度センサ１２
の間を抜けて感光体３に当り、感光体表面に形成された
トナー像を乱し翫かつ濃度センサ１２の受光面にトナー
が付着して感度が低下し、異常画像発生の原因となる。In order to prevent the rotation of the photoconductor itself and the wire contamination of the charger 13, during image formation, a non-illustrated means is used to circulate around the photoconductor in the direction shown by arrow G, and then between the lower part of the eraser 11 and the developing section. A passing wind is being carried away. Therefore, as mentioned above, when the wind flows into the lower part of the eraser 11, the wind G
The air stagnates between the eraser 11 and the photoreceptor 3, and the toner contained in the air adheres to the surface of the eraser 11, reducing the amount of light.
The toner passes through the gaps and hits the photoreceptor 3, disturbing the toner image formed on the surface of the photoreceptor, and the toner adheres to the light receiving surface of the density sensor 12, reducing sensitivity and causing abnormal images.
第３図は、このような問題を解決した本発明の実施例を
示す図である０第３図に示す実施例では、冷却ファ゛ン
゛４の排出口から吹出す風がトナー補給部７及び現像部
の上部を経てイレーザの方に流れないように装置の全幅
（感光体ドラムの軸方向全長）に亘ってシール部材１４
をカード部材１０の上端と光学ペース１５との間を塞い
で設けである。FIG. 3 is a diagram showing an embodiment of the present invention that solves such problems. In the embodiment shown in FIG. A sealing member 14 is installed over the entire width of the device (the entire axial length of the photoreceptor drum) to prevent the flow from flowing toward the eraser through the upper part of the developing section.
This is provided by closing the space between the upper end of the card member 10 and the optical space 15.
又、シール部材１０に沿って流れ現像部の発熱を奪った
風が画像濃度センサ１２の方に流れないように、現像部
ハウジング１の概ね最下部付近と構造部材５との間にも
全幅に亘ってシール部材１６が設けられている。た寸し
、シール部材、１６で塞がれた通風路の手前側の装置ノ
１ウジング１７には開口１８が設けられており、カード
部材１０に沿って流れ、現像部を冷却した風は開口１８
より装置外に吹出すようにされている。なお、符号１９
は側部シール部材である。Further, in order to prevent the wind that flows along the sealing member 10 and takes heat away from the developing section from flowing toward the image density sensor 12, a gap is provided across the entire width between approximately the lowest part of the developing section housing 1 and the structural member 5. A sealing member 16 is provided throughout. An opening 18 is provided in the housing 17 of the device on the front side of the ventilation passage blocked by the sealing member 16, and the air that flows along the card member 10 and cools the developing section passes through the opening. 18
The air is blown out of the device. In addition, the code 19
is a side seal member.
これによって、現像部を充分冷却することができるとと
もに、イレーザ及び画像濃度センサのトナー汚れや感光
体上に形成されたトナー像の風による乱れを防止するこ
とができる。As a result, the developing section can be sufficiently cooled, and it is also possible to prevent toner stains on the eraser and image density sensor and to prevent the toner image formed on the photoreceptor from being disturbed by wind.
効 果
以上の如く、本発明によれば効率良く現像部を冷却する
ことができる。Effects As described above, according to the present invention, the developing section can be efficiently cooled.
第１図は本発明の実施例を示す側断面図、第２図はその
実施例の冷却ファンによる風の流れによって生ずること
のある問題点を説明する側断面図、第３図はその問題点
を解決する本発明の第２実施例を示す側断面図、第４図
は第３図における■−■線による断面図、第５図は従来
の装置の側断面図である。
ｌ・・・現像部ノ・ウジング、Fig. 1 is a side sectional view showing an embodiment of the present invention, Fig. 2 is a side sectional view illustrating problems that may occur due to the flow of air by the cooling fan of the embodiment, and Fig. 3 is the problem. FIG. 4 is a sectional view taken along the line ■--■ in FIG. 3, and FIG. 5 is a side sectional view of a conventional device. l...Developing section no-Using,
Claims (1)
装置の外部より空気を吸引する冷却用ファンとを有する
静電記録装置の現像部の冷却装置において、一方の端部
が上記の現像部ハウジングに接し、他方の端部が上記の
冷却用ファンの排気口近傍に配置された熱伝導性材料よ
り成るカード部材を有することを特徴とする現像部の冷
却装置。In a cooling device for a developing section of an electrostatic recording device having a developing section having a housing formed of a thermally conductive material and a cooling fan that sucks air from outside the device, one end of the developing section housing has the above-mentioned developing section housing. 1. A cooling device for a developing section, comprising a card member made of a thermally conductive material, the other end of which is in contact with the cooling fan and is disposed near the exhaust port of the cooling fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62016245A JPS63184774A (en) | 1987-01-28 | 1987-01-28 | Device for cooling developing part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62016245A JPS63184774A (en) | 1987-01-28 | 1987-01-28 | Device for cooling developing part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63184774A true JPS63184774A (en) | 1988-07-30 |
Family
ID=11911170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62016245A Pending JPS63184774A (en) | 1987-01-28 | 1987-01-28 | Device for cooling developing part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63184774A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002365888A (en) * | 2001-06-12 | 2002-12-18 | Ricoh Co Ltd | Image forming apparatus |
| EP1821159A2 (en) | 2006-02-20 | 2007-08-22 | Ricoh Company, Ltd. | Cooling structure and image forming apparatus |
| US7469111B2 (en) | 2005-04-08 | 2008-12-23 | Oce Printing Systems Gmbh | Printer or copier with a refrigerator for generation of cold |
| EP2053467A3 (en) * | 2007-10-24 | 2009-10-14 | Konica Minolta Business Technologies, Inc. | Image Forming Apparatus |
| JP2017203942A (en) * | 2016-05-13 | 2017-11-16 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus |
-
1987
- 1987-01-28 JP JP62016245A patent/JPS63184774A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002365888A (en) * | 2001-06-12 | 2002-12-18 | Ricoh Co Ltd | Image forming apparatus |
| US7469111B2 (en) | 2005-04-08 | 2008-12-23 | Oce Printing Systems Gmbh | Printer or copier with a refrigerator for generation of cold |
| EP1821159A2 (en) | 2006-02-20 | 2007-08-22 | Ricoh Company, Ltd. | Cooling structure and image forming apparatus |
| JP2007219398A (en) * | 2006-02-20 | 2007-08-30 | Ricoh Co Ltd | Cooling structure and image forming apparatus |
| EP1821159A3 (en) * | 2006-02-20 | 2008-02-27 | Ricoh Company, Ltd. | Cooling structure and image forming apparatus |
| EP2053467A3 (en) * | 2007-10-24 | 2009-10-14 | Konica Minolta Business Technologies, Inc. | Image Forming Apparatus |
| JP2017203942A (en) * | 2016-05-13 | 2017-11-16 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus |
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