JPH04184459A - Recording sheet cooling device of image recorder - Google Patents
Recording sheet cooling device of image recorderInfo
- Publication number
- JPH04184459A JPH04184459A JP2314702A JP31470290A JPH04184459A JP H04184459 A JPH04184459 A JP H04184459A JP 2314702 A JP2314702 A JP 2314702A JP 31470290 A JP31470290 A JP 31470290A JP H04184459 A JPH04184459 A JP H04184459A
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- temperature
- recording sheet
- guide plate
- cooling guide
- 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 104
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 230000000694 effects Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 210000000078 claw Anatomy 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
Landscapes
- Fixing For Electrophotography (AREA)
- Paper Feeding For Electrophotography (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
この発明はプリンタ、ファクシミリ等の熱定着装置を有
する画像記録機の記録シート冷却装置に関する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a recording sheet cooling device for an image recording machine having a heat fixing device, such as a printer or a facsimile machine.
従来の技術
従来の熱定着装置を有する画像記録機を、第１図に示す
この発明の実施例を参照して説明すると、１は熱定着装
置を示し、熱定着装置ｌには、記録シート６が図示され
ていない転写部で転写された未定着トナー像を坦持して
、定着ローラ３と加圧ローラ５とのニップ部に搬入され
、図示されていない加圧手段で加圧ローラ５を定着ロー
ラ３に押圧する二とによって加熱加圧されて、未定着ト
ナー像は記録シート６に定着される。定着ローラ３はヒ
ータ・二を内蔵して、サーミスタフによって通常１８５
°Ｃに温度コントロールされ、加圧ローラ５は表面に５
Ｍ厚のシリコーンゴム層が設けられている。2. Description of the Related Art A conventional image recording machine having a heat fixing device will be described with reference to an embodiment of the present invention shown in FIG. is carried to the nip between the fixing roller 3 and the pressure roller 5, carrying the unfixed toner image transferred by a transfer section (not shown), and presses the pressure roller 5 by a pressure means (not shown). The unfixed toner image is fixed onto the recording sheet 6 by being heated and pressurized by the fixing roller 3 and the fixing roller 3 . The fixing roller 3 has a built-in heater 2 and is normally heated to 185 mm by a thermistough.
The temperature is controlled at °C, and the pressure roller 5 is placed on the surface of the
A silicone rubber layer with a thickness of M is provided.
このような熱定着装置〕によって画像が定着された記録
シート６は熱をもっているので、機外に排出されてスタ
ックされると蓄熱が発生して、記録シート６上のトナー
が粘性をもって、次のスタックされた記録シート６の裏
面に貼り付き、いわゆるブロッキング現象がおこる場合
かある。これは特に高速機等で定着後の記録シート６か
充分に冷えきらないうちに、連続通紙されてスタックさ
れた場合によくみられる現象である。このようにして貼
り付いた記録シート６を剥離しようとすると、騒音を発
生するば力叫ノでなく、ｊ枚ｊ枚無傷で取り呂す二とが
困難であるという問題がある。The recording sheet 6 on which the image has been fixed by such a heat fixing device has heat, so when it is ejected from the machine and stacked, heat is accumulated, and the toner on the recording sheet 6 becomes viscous, causing it to become viscous. In some cases, the recording sheet 6 may stick to the back side of the stacked recording sheets 6, causing a so-called blocking phenomenon. This phenomenon is particularly common when the recording sheets 6 after fixing are continuously fed and stacked before they have sufficiently cooled down in a high-speed machine or the like. If an attempt is made to peel off the recording sheets 6 stuck in this manner, there is a problem in that it is difficult to remove the recording sheets 6 without causing any damage, rather than making noise with force.
そこで二のような問題を解消するために、熱定着装置１
において画像を定着され、分離爪ｌＯで分離されて］
２０ ’Ｃ前後となっている記録シート６が、カイト板
１１を経て排紙ころ１２゜１３に搬送され、その後中継
ガイド板上を搬送される際、図示しない送風手段によっ
て送られる空気によって、この記録シート６を冷却する
記録シート冷却装置が提案された。Therefore, in order to solve the second problem, the heat fixing device 1
The image is fixed at the holder and separated by the separating claw lO.]
When the recording sheet 6, which has a temperature of around 20'C, is conveyed through the kite plate 11 to the paper discharge rollers 12 and 13, and then conveyed on the relay guide plate, this air is blown by the air sent by a blowing means (not shown). A recording sheet cooling device for cooling the recording sheet 6 has been proposed.
発明が解決しようとする課題
ところでこのような記録シート冷却装置は冷却効率が悪
く、特にニップ部から冷却場所までの距離か画像記録機
の全体の構成上充分に長くとれない場合には、きわめて
不充分な冷却しか行う二とができず、従って満足できる
冷却を行うためには、広いスペースを必要とするという
問題かある。Problems to be Solved by the Invention However, such recording sheet cooling devices have poor cooling efficiency, and are extremely inefficient, especially when the distance from the nip to the cooling location cannot be sufficiently long due to the overall structure of the image recording machine. The problem is that it is only possible to provide sufficient cooling, and therefore a large amount of space is required to provide satisfactory cooling.
そこでこの発明の目的は、前記のような従来の記録シー
ト冷Ｈ装置のもつ開運を解消し、冷却効率か良くて、冷
却場所がニップ部より長い距離をおいて設けなくとも、
満足できる冷却を行う二とができて、省スペースを実現
することのできる記録シート冷却装置を提供するにある
。Therefore, an object of the present invention is to eliminate the disadvantages of the conventional recording sheet cooling device as described above, to achieve good cooling efficiency, and to provide a system that does not require the cooling location to be located at a distance longer than the nip portion.
To provide a recording sheet cooling device capable of performing satisfactory cooling and realizing space saving.
課題を解決するための手段
この発明は前記のような目的を達成するために、前記の
ような従来の熱定着装置を有する画像記録機の記録シー
ト冷却装置において、請求項１の発明は熱定着装置から
排出された記録シートをガイドしながら冷却する冷却ガ
イド板と、この冷却ガイド板の温度を検知する温度検知
手段と、この温度検知手段によって検知した温度が設定
温度以上となったとき、前記冷却カイト板を冷却する冷
却手段とを設けたことを特徴とするものである。Means for Solving the Problems In order to achieve the above object, the present invention provides a recording sheet cooling device for an image recording machine having a conventional heat fixing device as described above. A cooling guide plate that guides and cools the recording sheet ejected from the apparatus, a temperature detection means that detects the temperature of the cooling guide plate, and when the temperature detected by the temperature detection means exceeds the set temperature, The cooling kite plate is characterized by being provided with a cooling means for cooling the cooling kite plate.
つきに請求項２の発明は同じ〈従来の熱定着装置を有す
る画像記録機の記録シート冷却装置において、熱定着装
置から排出された記録シートを搬送しなから冷却する冷
却ローラと、二の冷却ローラの温度を検知する温度検知
手段と、この温度検知手段によって検知した温度が設定
温度以上となったとき、前記冷却ローラを冷却する冷却
手段とを設けたことを特徴とするものである。Accordingly, the invention of claim 2 is the same <In a recording sheet cooling device of an image recording machine having a conventional thermal fixing device, a cooling roller that cools the recording sheet discharged from the thermal fixing device before being conveyed, and a second cooling roller. The apparatus is characterized in that it includes a temperature detection means for detecting the temperature of the roller, and a cooling means for cooling the cooling roller when the temperature detected by the temperature detection means exceeds a set temperature.
また請求項３の発明は同じ〈従来の熱定着装置を有する
画像記録機の記録シート冷却装置において、熱定着装置
から排出された記録シートを搬送しながら冷却する冷却
ベルトと、この冷却ベルトの温度を検知する温度検知手
段と、この温度検知手段によって検知した温度が設定温
度以上となったとき、前記冷却ベルトを冷却する冷却手
段とを設けたことを特徴とするものである。In addition, the invention of claim 3 is the same <In a recording sheet cooling device of an image recording machine having a conventional thermal fixing device, there is provided a cooling belt that cools the recording sheet discharged from the thermal fixing device while conveying it, and a temperature of the cooling belt. The present invention is characterized in that it is provided with a temperature detecting means for detecting the temperature, and a cooling means for cooling the cooling belt when the temperature detected by the temperature detecting means exceeds a set temperature.
作 用
前記のようなこの発明において、請求項１の冷却装置は
熱定着装置から排出された記録シートか冷却カイト板上
を移動する際、この冷却ガイド板が記録シートから吸熱
してこれを冷却し、これによって冷却ガイド板の温度が
温度検知手段に設定した温度になると、二の検知信号に
よって冷却手段が作動して冷却ガイド板を冷却すること
となる。請求項２゜３の冷却装置は熱定着装置から排量
された記録シートが、それぞれ冷却ローラまたは冷却ベ
ルト上を移動する際、前記と全く同様にして冷却される
こととなる。Function: In this invention as described above, the cooling device according to claim 1 is configured such that when the recording sheet discharged from the heat fixing device moves on the cooling kite plate, the cooling guide plate absorbs heat from the recording sheet and cools it. However, when the temperature of the cooling guide plate reaches the temperature set in the temperature detection means, the cooling means is activated by the second detection signal to cool the cooling guide plate. In the cooling device of the second aspect, when the recording sheet discharged from the heat fixing device moves on the cooling roller or the cooling belt, it is cooled in exactly the same manner as described above.
実施例
第１．２図に示す請求項１の冷却装置の実施例において
、熱定着装置ｌは前記従来のものと同様に構成されてお
り、この熱定着装置１の排紙ころ１２．１３の下流に、
上方に中継ガイド板１６をまた下方に冷却ガイド板１７
を設け、この冷却ガイド板１７の上方に搬送ローラ１８
をこれに接触させて配置する。この冷却ガイド板Ｊ７に
は第２図に示すように温度検知素子２６が設けられ、ま
た下面にはペルチェ２５、放熱面２７、放熱フィン２８
及びファン１９が設けられている。この場合温度検知素
子２６は図示の位置以外に冷却カイト板１７の表面を検
知する位置に設けてもよく、またペルチェ２５に代えて
冷却カイト板】７にヒートパイプを埋め込んだり、直接
送風ファンによる冷風によって冷却し、送風ファンを温
度検知素子２６によってオン、オフ制御をするようにし
てもよい。なお第１図において、２１．２２は排紙ロー
ラ、２３は排紙トレーを示す。Embodiment In the embodiment of the cooling device of claim 1 shown in FIG. downstream,
A relay guide plate 16 is placed above and a cooling guide plate 17 is placed below.
A transport roller 18 is provided above the cooling guide plate 17.
Place it in contact with this. This cooling guide plate J7 is provided with a temperature detection element 26 as shown in FIG.
and a fan 19 are provided. In this case, the temperature detection element 26 may be provided at a position other than the position shown in the figure to detect the surface of the cooling kite plate 17, and instead of the Peltier 25, a heat pipe may be embedded in the cooling kite plate 7, or a heat pipe may be installed directly on the cooling kite plate 7. Cooling may be performed using cold air, and the blower fan may be turned on and off using the temperature detection element 26. In FIG. 1, reference numerals 21 and 22 indicate paper discharge rollers, and 23 indicates a paper discharge tray.
前記のような記録シート冷却装置２の作用について説明
する。The operation of the recording sheet cooling device 2 as described above will be explained.
定着装置１において、画像が定着された記録シート６が
排紙ころ１２．１３によって中継ガイド板１６と冷却ガ
イド板１７との間を経て、冷却カイト板１７と搬送ロー
ラ１８との圧接部へ搬送され、冷却ガイド板１７上を移
動している際、この冷却ガイド板１７によって冷却され
たうえ、排紙ローラ２１．２２を経て排紙トレー２３に
排紙される。この際冷却ガイド板１７の温度が温度検知
素子２６によって検知され、それが設定された温度より
高くなると、ペルチェ２５を作動させて設定温度まで低
下させ、このようにして冷却ガイド板１７を設定温度に
保つことにより、記録シート６を最適温度にして排紙ト
レー２３に排紙することとなる。なお必要に応じてファ
ン１９、放熱フィン２８及び放熱面２７を利用すること
となる。In the fixing device 1, the recording sheet 6 on which the image has been fixed is conveyed by paper ejection rollers 12, 13 between the relay guide plate 16 and the cooling guide plate 17 to the pressure contact area between the cooling kite plate 17 and the conveying roller 18. While moving on the cooling guide plate 17, the sheet is cooled by the cooling guide plate 17 and is discharged onto the sheet discharge tray 23 via the sheet discharge rollers 21,22. At this time, the temperature of the cooling guide plate 17 is detected by the temperature detection element 26, and when it becomes higher than the set temperature, the Peltier 25 is activated to lower the temperature to the set temperature, and in this way, the temperature of the cooling guide plate 17 is lowered to the set temperature. By keeping the recording sheet 6 at the optimum temperature, the recording sheet 6 is discharged onto the paper discharge tray 23. Note that the fan 19, heat radiation fins 28, and heat radiation surface 27 may be used as necessary.
第３図に示す第２実施例は第１実施例の冷却ガイド板１
７に代えて、冷却ローラ３０を採用し、３１はこれに対
向して設けられた搬送ローラを示す。第４図に示す第３
実施例は第１実施例の冷却ガイド板１７に代えて、冷却
ベルト３２を採用し、３３はこれに対向して設けられた
搬送ベルト、３４．３５．３６．３７はそれぞれ搬送ベ
ルトローラを示す。これらの第２，３実施例には第１実
施例における各部材２５．２６．２７゜２８を図示する
ことを省略したが、同様に設けられるものである。この
ような第２，３実施 ・例の作用は第１実施例と同様で
あるので、その説明を省略する。The second embodiment shown in FIG. 3 is a cooling guide plate 1 of the first embodiment.
In place of 7, a cooling roller 30 is employed, and 31 indicates a conveyance roller provided opposite to this. 3 shown in Figure 4.
In this embodiment, a cooling belt 32 is used instead of the cooling guide plate 17 of the first embodiment, 33 is a conveyor belt provided opposite to this, and 34, 35, 36, and 37 are conveyor belt rollers, respectively. . In these second and third embodiments, although illustrations of the members 25, 26, 27° 28 in the first embodiment are omitted, they are provided in the same way. Since the operations of the second and third embodiments are similar to those of the first embodiment, their explanation will be omitted.
発明の効果
この発明は前記のようであって、熱定着装置から排出さ
れた記録シートを冷却カイト板でガイドしな力・・ら冷
却し、冷却ガイド板の温度を温度検知手で検知しながら
、検知した温度が設定温度以上となったとき、冷却手段
によって冷却ガイド板を冷却するようにしたので、記録
シートのもつ熱を冷却カイト板を介して効率良く放熱し
、簡単な構成で冷却効果を高めることができて、その結
果記録シートの冷却のために、広いスペースを設ける必
要がなくて、省スペースを可能にするという効果がある
。また冷却ローラまたは冷却ベルトによって記録シート
を搬送しながら冷却することによって、冷却ガイド板の
場合と全く同様な効果を奏する。Effects of the Invention The present invention is as described above, in which a recording sheet discharged from a heat fixing device is cooled by a cooling kite plate while being guided by force, and the temperature of the cooling guide plate is detected by a temperature sensor hand. When the detected temperature exceeds the set temperature, the cooling guide plate is cooled by the cooling means, so the heat of the recording sheet is efficiently radiated through the cooling kite plate, and the cooling effect is achieved with a simple configuration. As a result, there is no need to provide a large space for cooling the recording sheet, resulting in the effect of saving space. Further, by cooling the recording sheet while conveying it using a cooling roller or a cooling belt, the same effect as that of the cooling guide plate can be obtained.
第１図はこの発明の第１実施例の正面図、第２図は同上
の要部の正面図、第３図はこの発明の第２実施例の正面
図、第４図はこの発明の第３実施例の正面図である。
］・熱定着装置
２・・記録シート冷却装置
３・・定着ローラ ５・加圧ローラ１７・・冷却
カイト板 １８・搬送ローラ１９・・・冷却ファン
２５・・・ペルチェ２６・・・温度検出素子
２７・・・放熱面特許出願人 株式会社 リ コ
−Fig. 1 is a front view of a first embodiment of the present invention, Fig. 2 is a front view of the main parts of the same as above, Fig. 3 is a front view of a second embodiment of the invention, and Fig. 4 is a front view of a second embodiment of the invention. It is a front view of 3rd Example. ]・Thermal fixing device 2・・Recording sheet cooling device 3・・Fixing roller 5・Pressure roller 17・・Cooling kite plate 18・Transport roller 19・・Cooling fan 25・・Peltier 26・・Temperature detection element
27... Heat dissipation surface patent applicant Rico Co., Ltd.
−
Claims (1)
置において、前記熱定着装置から排出された記録シート
をガイドしながら冷却する冷却ガイド板と、この冷却ガ
イド板の温度を検知する温度検知手段と、この温度検知
手段によって検知した温度が設定温度以上となったとき
、前記冷却ガイド板を冷却する冷却手段とを設けたこと
を特徴とする記録シート冷却装置。 ２、熱定着装置を有する画像記録機の記録シート冷却装
置において、前記熱定着装置から排出された記録シート
を搬送しながら冷却する冷却ローラと、この冷却ローラ
の温度を検知する温度検知手段と、この温度検知手段に
よって検知した温度が設定温度以上となったとき、前記
冷却ローラを冷却する冷却手段とを設けたことを特徴と
する記録シート冷却装置。 ３、熱定着装置を有する画像記録機の記録シート冷却装
置において、前記熱定着装置から排出された記録シート
を搬送しながら冷却する冷却ベルトと、この冷却ベルト
の温度を検知する温度検知手段と、この温度検知手段に
よって検知した温度が設定温度以上となったとき、前記
冷却ベルトを冷却する冷却手段とを設けたことを特徴と
する記録シート冷却装置。[Scope of Claims] 1. In a recording sheet cooling device of an image recording machine having a thermal fixing device, a cooling guide plate that guides and cools the recording sheet discharged from the thermal fixing device, and a temperature of this cooling guide plate. 1. A recording sheet cooling device comprising: a temperature detecting means for detecting the temperature; and a cooling means for cooling the cooling guide plate when the temperature detected by the temperature detecting means exceeds a set temperature. 2. In a recording sheet cooling device of an image recording machine having a thermal fixing device, a cooling roller that cools the recording sheet discharged from the thermal fixing device while conveying it, and a temperature detection means that detects the temperature of the cooling roller; A recording sheet cooling device comprising a cooling means for cooling the cooling roller when the temperature detected by the temperature detection means exceeds a set temperature. 3. In a recording sheet cooling device of an image recording machine having a thermal fixing device, a cooling belt that cools the recording sheet discharged from the thermal fixing device while conveying it, and a temperature detection means that detects the temperature of the cooling belt; A recording sheet cooling device comprising a cooling means for cooling the cooling belt when the temperature detected by the temperature detection means exceeds a set temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2314702A JPH04184459A (en) | 1990-11-20 | 1990-11-20 | Recording sheet cooling device of image recorder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2314702A JPH04184459A (en) | 1990-11-20 | 1990-11-20 | Recording sheet cooling device of image recorder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04184459A true JPH04184459A (en) | 1992-07-01 |
Family
ID=18056524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2314702A Pending JPH04184459A (en) | 1990-11-20 | 1990-11-20 | Recording sheet cooling device of image recorder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04184459A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6788905B2 (en) | 2001-12-20 | 2004-09-07 | Fuji Xerox Co., Ltd. | Image forming apparatus with sheet discharging device and discharge control unit |
| JP2006258953A (en) * | 2005-03-15 | 2006-09-28 | Fuji Xerox Co Ltd | Cooling conveyance device and image forming apparatus using same |
| JP2011013326A (en) * | 2009-06-30 | 2011-01-20 | Ricoh Co Ltd | Image forming device and sheet material conveying device |
| JP2014115490A (en) * | 2012-12-11 | 2014-06-26 | Konica Minolta Inc | Image forming apparatus |
| US9188912B2 (en) | 2013-01-08 | 2015-11-17 | Ricoh Company, Ltd. | Sheet guiding unit separating mechanism, fixing device with sheet guiding unit separating mechanism, and image forming apparatus with fixing device with sheet guiding unit separating mechanism |
-
1990
- 1990-11-20 JP JP2314702A patent/JPH04184459A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6788905B2 (en) | 2001-12-20 | 2004-09-07 | Fuji Xerox Co., Ltd. | Image forming apparatus with sheet discharging device and discharge control unit |
| JP2006258953A (en) * | 2005-03-15 | 2006-09-28 | Fuji Xerox Co Ltd | Cooling conveyance device and image forming apparatus using same |
| JP2011013326A (en) * | 2009-06-30 | 2011-01-20 | Ricoh Co Ltd | Image forming device and sheet material conveying device |
| JP2014115490A (en) * | 2012-12-11 | 2014-06-26 | Konica Minolta Inc | Image forming apparatus |
| US9188912B2 (en) | 2013-01-08 | 2015-11-17 | Ricoh Company, Ltd. | Sheet guiding unit separating mechanism, fixing device with sheet guiding unit separating mechanism, and image forming apparatus with fixing device with sheet guiding unit separating mechanism |
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