JP4558364B2 - Image forming apparatus - Google Patents

Image forming apparatus Download PDF

Info

Publication number
JP4558364B2
JP4558364B2 JP2004091637A JP2004091637A JP4558364B2 JP 4558364 B2 JP4558364 B2 JP 4558364B2 JP 2004091637 A JP2004091637 A JP 2004091637A JP 2004091637 A JP2004091637 A JP 2004091637A JP 4558364 B2 JP4558364 B2 JP 4558364B2
Authority
JP
Japan
Prior art keywords
heat
image forming
forming apparatus
exhaust
image
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 - Fee Related
Application number
JP2004091637A
Other languages
Japanese (ja)
Other versions
JP2005275253A (en
Inventor
潤也 瀧川
泰明 飯嶋
賢一 竹原
圭亮 内田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP2004091637A priority Critical patent/JP4558364B2/en
Publication of JP2005275253A publication Critical patent/JP2005275253A/en
Application granted granted Critical
Publication of JP4558364B2 publication Critical patent/JP4558364B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Control Or Security For Electrophotography (AREA)
  • Color Electrophotography (AREA)

Description

本発明は、電子写真方式の画像形成装置に関する。   The present invention relates to an electrophotographic image forming apparatus.

特許文献１，２には、電子写真方式の画像形成装置において、定着装置から作像部への断熱を行う手段について開示されている。   Patent Documents 1 and 2 disclose means for heat insulation from a fixing device to an image forming unit in an electrophotographic image forming apparatus.

特開２０００−２２７７３０公報JP 2000-227730 A 特開２００１−１８３９５９公報JP 2001-183959 A

今日の電子写真装置は、市場からの要求にともない、カラー複写機やカラープリンタなど、カラー画像が形成できる機種が多い。このようなカラー電子写真装置には、１つの感光体のまわりに複数色の現像装置を備え、これらの現像装置でトナーを付着させて感光体上に合成トナー画像を形成し、そのトナー画像を転写してシートにカラー画像を記録する、いわゆる１ドラム型のものと、並べて配置された複数の感光体にそれぞれ個別に現像装置を備え、各感光体上にそれぞれ単色トナー画像を形成し、それらの単色トナー画像を順次転写してシートに合成カラー画像を記録する、いわゆるタンデム型のものとが知られている。   Many of today's electrophotographic apparatuses can form color images, such as color copiers and color printers, in accordance with market demands. Such a color electrophotographic apparatus is provided with a developing device of a plurality of colors around one photosensitive member, and a toner is attached by these developing devices to form a composite toner image on the photosensitive member. A so-called one-drum type that transfers and records a color image on a sheet, and a plurality of photoconductors arranged side by side are each provided with a developing device, and a monochromatic toner image is formed on each photoconductor. A so-called tandem type is known in which a single color toner image is sequentially transferred to record a composite color image on a sheet.

このような１ドラム型とタンデム型とを比較すると、前者には、感光体が１つであるから、比較的容易に装置を小型化でき、製造コストも低減できる利点はあるものの、単一の感光体を用いて複数回（通常は４回）の画像形成を繰り返してフルカラー画像を形成するため、画像形成の高速化には困難であるという不具合がある。また、後者は、逆に装置が大型化し、製造コストが高くなる不具合はあるものの、画像形成の高速化が容易である利点がある。   Comparing such a one-drum type and a tandem type, since the former has one photoconductor, there is an advantage that the apparatus can be reduced in size relatively easily and the manufacturing cost can be reduced. Since a full-color image is formed by repeating image formation a plurality of times (usually four times) using a photoconductor, there is a problem that it is difficult to increase the speed of image formation. On the other hand, the latter has the advantage that it is easy to speed up image formation, although there is a problem that the apparatus becomes large and the manufacturing cost increases.

そして、最近は、フルカラーもモノクロ画像形成の際と同様の高速化が要求されていることから、タンデム型が注目されてきている。   In recent years, tandem type has been attracting attention because full-color is required to have the same high speed as monochrome image formation.

タンデム型の電子写真装置には、各感光体上の画像を転写装置により、シート搬送ベルトで搬送するシートに順次転写する直接転写方式のものと、各感光体上の画像を１次転写装置によりいったん中間転写ベルトに順次転写して後、その中間転写ベルト上の画像を２次転写装置によりシートに一括転写する間接転写方式のものとがある。この場合の二次転写装置は一般にはローラ形状であるが、転写搬送ベルト形状のものも用いられている。   The tandem type electrophotographic apparatus includes a direct transfer system in which images on each photoconductor are sequentially transferred to a sheet conveyed by a sheet conveying belt by a transfer device, and an image on each photoconductor by a primary transfer device. There is an indirect transfer type in which images are sequentially transferred to an intermediate transfer belt once, and then images on the intermediate transfer belt are collectively transferred to a sheet by a secondary transfer device. The secondary transfer device in this case is generally in the shape of a roller, but a transfer transfer belt shape is also used.

この直接転写方式のものと間接転写方式のものとを比較すると、前者は、搬送シートに対して直接各感光体から転写させるために搬送シートがシート搬送ベルト上で変動してしまうと各感光体で書き込まれた画像がずれてしまう不具合がある。これに対し、後者は、２次転写位置を比較的自由に設置することができ、また、搬送するシートが変動してもシートに対して画像を転写する際は各感光体によって書かれた画像は既に合致しており、シートが変動しても画像がずれない長所がある。   Comparing the direct transfer type and the indirect transfer type, the former is the case where the conveyance sheet fluctuates on the sheet conveyance belt in order to transfer the conveyance sheet directly from each photosensitive element. There is a problem that the image written in is shifted. On the other hand, in the latter, the secondary transfer position can be set relatively freely, and even when the conveyed sheet fluctuates, the image written by each photoconductor is used when transferring the image to the sheet. Already match, and there is an advantage that the image does not shift even if the sheet fluctuates.

以上の点から、最近は、タンデム型の電子写真装置の中でも間接転写方式のものが注目されている。   In view of the above, recently, an indirect transfer type of tandem type electrophotographic apparatus has attracted attention.

このような間接転写方式の電子写真装置においては、装置の横方向のサイズを小型化するために、装置内部の高密度化を図るとともに定着装置を中間転写ベルトの下側にもぐりこませるような構成とされており、中間転写ベルトに対して定着装置が近接してしまうことになる。また、電子写真装置の高速化に伴って装置内部の発熱量も増大している。そのため、発熱体である定着装置によって中間転写ベルトが熱的影響を受けてしまうことになる。そのため、定着装置から発生する熱により各色のトナー画像を中間転写ベルトに転写する際に、各色の画像を作成する各作像装置（感光体を中心に各色の画像を形成する装置）において中間転写ベルトの伸び縮みが生じるので、各色の画素の伸び率に不一致が生じ、タンデム型のカラー画像形成装置の画像劣化の一つである色ずれ及びバンディングの要因になるという不具合がある。   In such an indirect transfer type electrophotographic apparatus, in order to reduce the lateral size of the apparatus, the internal density of the apparatus is increased and the fixing device is also pulled under the intermediate transfer belt. The fixing device comes close to the intermediate transfer belt. In addition, the amount of heat generated inside the apparatus is increasing as the speed of the electrophotographic apparatus increases. Therefore, the intermediate transfer belt is thermally affected by the fixing device that is a heating element. Therefore, when transferring the toner image of each color to the intermediate transfer belt by the heat generated from the fixing device, the intermediate transfer is performed in each image forming device (device that forms the image of each color around the photosensitive member). Since the belt stretches and contracts, there is a problem in that the elongation ratio of the pixels of each color does not match, which causes color misregistration and banding, which is one of the image degradations of the tandem color image forming apparatus.

本発明の目的は、中間転写ベルトなどの像担持体を備えた電子写真方式の画像形成装置において、定着装置から像担持体に熱的要因が及ばないようにすることである。   An object of the present invention is to prevent thermal factors from being applied to an image carrier from a fixing device in an electrophotographic image forming apparatus having an image carrier such as an intermediate transfer belt.

本発明は、トナー画像が形成される像担持体と、前記像担持体上のトナー画像を媒体上
に転写する転写装置と、前記像担持体の下側に配置され前記媒体上で前記トナー画像を定
着する定着装置と、前記定着装置が発する熱を所定位置にある放熱部に導いて排出するヒ
ートパイプからなる第１の排熱部材と、前記定着装置を通過した後の前記媒体が発する熱
及び水蒸気を、前記所定位置の放熱部に隣接した排出口に導いて排出する排出流路を形成
する第２の排熱部材と、前記第１の排熱部材と前記排出流路とを断熱する第１の断熱部材
と、前記第２の排熱部材の前記第１の排熱部材側とは反対側の外壁に設けた第２の断熱部
材と、を備え、前記排出流路に面している前記第１の断熱部材の内壁及び前記第２の断熱
部材の内壁それぞれぞれの下部に、前記定着装置を通過した後の前記媒体が発した水蒸気
が結露して生じた水滴を受け止める受止部材が設けられている電子写真方式の画像形成装
置である。 The present invention provides an image carrier on which a toner image is formed, a transfer device that transfers the toner image on the image carrier onto a medium, and the toner image on the medium that is disposed below the image carrier. A fixing device for fixing the heat, a first heat exhaust member comprising a heat pipe for discharging the heat generated by the fixing device to a heat radiating portion at a predetermined position, and heat generated by the medium after passing through the fixing device. And the second exhaust heat member that forms an exhaust flow path that guides and discharges water vapor to an exhaust port adjacent to the heat radiating portion at the predetermined position, and insulates the first exhaust heat member and the exhaust flow path. A first heat insulating member, and a second heat insulating member provided on an outer wall of the second heat exhausting member opposite to the first heat exhausting member side, facing the exhaust flow path No, respectively inner walls respectively of the first inner wall of the heat insulating member and the second insulation <br/> members are In part, a electrophotographic image forming apparatus wherein the medium after passing through the fixing device is emitted steam is receiving member for receiving the water droplets generated by dew condensation are provided.

本発明によれば、第１の排熱部材と第２の排熱部材との間を断熱することにより、装置を大型化することなく定着装置からの熱が像担持体に与える影響を低減し、熱を持ち去りたい定着装置以外の熱負荷が第１の排熱部材に加わり、熱運搬効率が悪化してしまうことを低減することができる。   According to the present invention, by insulating the space between the first heat exhaust member and the second heat exhaust member, the influence of heat from the fixing device on the image carrier can be reduced without increasing the size of the device. It can be reduced that the heat load other than the fixing device that wants to carry away heat is applied to the first exhaust heat member and the heat carrying efficiency is deteriorated.

本発明を実施するための最良の一形態について説明する。   The best mode for carrying out the present invention will be described.

図１は本実施の形態の画像形成装置１の概略構成を示す説明図であり、図２は画像形成装置１の要部の斜視図、図３は画像形成装置１の要部の正面図である。   FIG. 1 is an explanatory diagram illustrating a schematic configuration of an image forming apparatus 1 according to the present embodiment, FIG. 2 is a perspective view of a main part of the image forming apparatus 1, and FIG. 3 is a front view of a main part of the image forming apparatus 1. is there.

この画像形成装置１は、間接転写方式を用いたタンデム型の電子写真装置である。画像形成装置１は、Ｙ（イエロー），Ｃ（シアン），Ｍ（マゼンダ），Ｋ（ブラック）の各色のトナー画像を周知の電子写真方式により形成する作像装置２Ｙ，２Ｃ，２Ｍ，２Ｋが並べて設けられている。作像装置２Ｙ，２Ｃ，２Ｍ，２Ｋの下部には中間転写ベルト３が設けられ、作像装置２Ｙ，２Ｃ，２Ｍ，２Ｋの各感光体ドラム４Ｙ，４Ｃ，４Ｍ，４Ｋに形成されたトナー画像は、それぞれ無端状の中間転写ベルト３に対して一次転写され、中間転写ベルト３上で複数の色のトナーが重ね合わされてカラー画像が形成される。そして、このカラー画像は、対向回転体５とその対向回転体５に対して加圧された最終転写体６とのニップ部で転写紙などの媒体Ｐに転写され、その後、定着装置７で画像の定着が行われる。   The image forming apparatus 1 is a tandem type electrophotographic apparatus using an indirect transfer method. The image forming apparatus 1 includes image forming apparatuses 2Y, 2C, 2M, and 2K that form toner images of each color of Y (yellow), C (cyan), M (magenta), and K (black) by a known electrophotographic method. It is provided side by side. An intermediate transfer belt 3 is provided below the image forming devices 2Y, 2C, 2M, and 2K, and toner images formed on the respective photosensitive drums 4Y, 4C, 4M, and 4K of the image forming devices 2Y, 2C, 2M, and 2K. Are primarily transferred to the endless intermediate transfer belt 3, and a plurality of color toners are superimposed on the intermediate transfer belt 3 to form a color image. The color image is transferred to a medium P such as transfer paper at the nip portion between the counter rotator 5 and the final transfer body 6 pressurized against the counter rotator 5. Is fixed.

画像形成装置１は、装置の横方向サイズの制約から、その定着装置７が最終転写体６により近づく方向に配置され、中間転写ベルト３の下部にもぐりこむように構成されている。従って定着装置７で発生した熱は対流によって真上に上昇し、中間転写ベルト３の方向に向かって伝わりやすい構成となっている。   The image forming apparatus 1 is configured such that the fixing device 7 is arranged in a direction closer to the final transfer body 6 due to the limitation of the lateral size of the apparatus, and is recessed under the intermediate transfer belt 3. Accordingly, the heat generated in the fixing device 7 rises directly above by convection and is easily transmitted in the direction of the intermediate transfer belt 3.

そのため、定着装置７の近傍で中間転写ベルト３が熱せられて膨張し、定着装置７から遠ざかるにつれて冷却することにより中間転写ベルト３が縮むため、中間転写ベルト３上で画像の伸縮が発生する。さらに、ある画像位置における各色の一次転写時の中間転写ベルト３の膨張率が異なるため、各色のトナーで中間転写ベルト３に対する一次転写位置が変動するため色ずれが発生する。   Therefore, the intermediate transfer belt 3 is heated and expanded in the vicinity of the fixing device 7, and the intermediate transfer belt 3 is contracted by being cooled as the distance from the fixing device 7 is increased. Furthermore, since the expansion rate of the intermediate transfer belt 3 at the time of primary transfer of each color at a certain image position is different, the primary transfer position with respect to the intermediate transfer belt 3 varies with the toner of each color, and color misregistration occurs.

そこで、定着装置７と中間転写ベルト３との間に第１の排熱部材となるヒートパイプ１１を設け、定着装置７から発生し、放射および対流により中間転写ベルト３方向に向かう熱を雰囲気温度の高い定着装置７と中間転写ベルト３との間の空間から、雰囲気温度の低い図３における装置の左側まで導き、そこに設けられた放熱部１２で放熱を行うことにより、効率よく装置外部への定着装置７の熱の拡散を行う。   Therefore, a heat pipe 11 serving as a first exhaust heat member is provided between the fixing device 7 and the intermediate transfer belt 3, and heat generated in the direction of the intermediate transfer belt 3 by radiation and convection is generated from the fixing device 7. 3 is led from the space between the high fixing device 7 and the intermediate transfer belt 3 to the left side of the device in FIG. The heat of the fixing device 7 is diffused.

また、定着装置７により熱せられ、転写紙などの媒体Ｐから発生した熱気、水蒸気を多く含んだ空気Ａを排出するため第２の排熱部材となる流路１３を設け、熱気や水蒸気を含む空気を流路１３で導き、強制排気装置である冷却ファン１４によって強制的に機外に排出させる。   Further, a flow path 13 serving as a second heat exhaust member is provided to discharge the air A containing a large amount of hot air and water vapor generated from the medium P such as transfer paper, which is heated by the fixing device 7, and includes hot air and water vapor. Air is guided through the flow path 13 and forcedly discharged outside the apparatus by a cooling fan 14 that is a forced exhaust device.

この際、媒体Ｐから発生した熱、水分を多く含んだ空気Ａが流通する流路１３と、ヒートパイプ１１とは、第１の断熱部材となる断熱部材１５により断熱されている。これにより本来運ばなければならない定着装置７から発生した熱を運搬する効率が、ヒートパイプ１１が熱運搬の途中経路で熱せられるために低下してしまうのを防ぐことができる。   At this time, the flow path 13 through which the air A containing a large amount of heat and moisture generated from the medium P and the heat pipe 11 are insulated by the heat insulating member 15 serving as the first heat insulating member. As a result, it is possible to prevent the efficiency of transporting the heat generated from the fixing device 7 that should be transported originally from being lowered because the heat pipe 11 is heated in the course of heat transport.

断熱部材１５は、熱、水蒸気を多く含んだ空気Ａが流れる流路１３のヒートパイプ１１側の隔壁であり、断熱効果を持った素材で構成されている。この断熱効果を持った素材としては、硬質ウレタン、ポリスチレンなどがあげられる。これにより、装置サイズを大きくすることなく、また、新たに部品を追加せずに効果的に断熱を行うことができ、低製造コスト、省スペースで効率的に媒体Ｐの排熱を行うことができる。   The heat insulating member 15 is a partition wall on the heat pipe 11 side of the flow path 13 through which air A containing a large amount of heat and water vapor flows, and is made of a material having a heat insulating effect. Examples of the material having the heat insulating effect include hard urethane and polystyrene. Accordingly, it is possible to effectively insulate without increasing the size of the apparatus and without newly adding parts, and to efficiently exhaust the medium P with low manufacturing cost and space saving. it can.

また、熱、水蒸気を多く含んだ空気Ａが流れる流路１３のヒートパイプ１１側の隔壁（断熱部材）１５とヒートパイプ１１の間には真空の空間１６が設けられている。これにより隔壁１５とヒートパイプ１１との接触面積が小さくなり、熱伝導が行われる接触面積が小さくなる。従って流路１３を流れる熱せられた空気Ａの熱が断熱材である隔壁１５及びその周囲の空気を通して、わずかにヒートパイプ１１へ伝導してしまうことをさらに低減することができる。   A vacuum space 16 is provided between the heat pipe 11 and the partition wall (heat insulating member) 15 on the heat pipe 11 side of the flow path 13 through which the air A containing a large amount of heat and water vapor flows. Thereby, the contact area of the partition 15 and the heat pipe 11 becomes small, and the contact area where heat conduction is performed becomes small. Therefore, it can be further reduced that the heat of the heated air A flowing through the flow path 13 is slightly conducted to the heat pipe 11 through the partition wall 15 which is a heat insulating material and the surrounding air.

さらに、冷却ファン１４によって流路１３流れる媒体Ｐの冷却を行う気流１９を装置の下側から上側に流れる上昇気流とすることで、定着装置７によって媒体Ｐが熱せられた際の熱による気体の密度低下が引き起こす浮力を用いて媒体Ｐの流路１３内に気流を流す力の補助として作用させることが可能となり、より効率のよい排熱を行うことができる。   Further, the airflow 19 for cooling the medium P flowing through the flow path 13 by the cooling fan 14 is changed to an upward airflow flowing from the lower side to the upper side of the apparatus, so that the gas due to heat when the medium P is heated by the fixing device 7 is changed. The buoyancy caused by the decrease in density can be used to assist the force of flowing the air flow in the flow path 13 of the medium P, so that more efficient exhaust heat can be performed.

媒体Ｐの冷却のための流路１３のヒートパイプ１１側とは反対側の外壁１７は断熱効果を持った素材で構成され、第２の断熱部材となる。断熱効果を持った素材としては、硬質ウレタン、ポリスチレンなどがあげられる。これにより、水蒸気を含んだ熱せられた空気Ａが流路１３を通る際に外気によって冷却される流路１３の装置外側の外壁１７によって急速に冷やされて、結露により水滴が発生し、媒体Ｐに落下してしまうのを未然に防ぐことができる。   The outer wall 17 on the side opposite to the heat pipe 11 side of the flow path 13 for cooling the medium P is made of a material having a heat insulating effect and serves as a second heat insulating member. Examples of the material having a heat insulating effect include hard urethane and polystyrene. As a result, the heated air A containing water vapor is rapidly cooled by the outer wall 17 outside the apparatus of the flow path 13 cooled by the outside air when passing through the flow path 13, and water droplets are generated due to condensation. Can be prevented from falling.

媒体Ｐの冷却のための流路１３の下部には、水滴の受止部材１８が設けられており（図４）、結露によって発生した水滴が媒体Ｐに落下するのを防止することができる。   A water drop receiving member 18 is provided below the flow path 13 for cooling the medium P (FIG. 4), and it is possible to prevent water drops generated by condensation from falling on the medium P.

なお、本実施の形態では、間接転写方式の電子写真装置を例に説明したが、本発明はこれに限定されるものではなく、定着装置の上部に感光体ドラムその他の像担持体が配置される様々な機種の画像形成装置に適用することができる。   In the present embodiment, an indirect transfer type electrophotographic apparatus has been described as an example. However, the present invention is not limited to this, and a photosensitive drum or other image carrier is disposed above the fixing device. The present invention can be applied to various types of image forming apparatuses.

本発明の一実施の形態である画像形成装置の概略構成を示す説明図である。1 is an explanatory diagram showing a schematic configuration of an image forming apparatus according to an embodiment of the present invention. 画像形成装置の要部の斜視図である。1 is a perspective view of a main part of an image forming apparatus. 画像形成装置の要部の正面図である。2 is a front view of a main part of the image forming apparatus. FIG. 流路の縦断面図である。It is a longitudinal cross-sectional view of a flow path.

符号の説明Explanation of symbols

１ 画像形成装置
２Ｙ，２Ｃ，２Ｍ，２Ｋ 作像装置
３ 像担持体、中間転写ベルト
４Ｙ，４Ｃ，４Ｍ，４Ｋ 感光体
７ 定着装置
１１ 第１の排熱部材
１３ 流路
１４ 強制排気装置
１５ 第１の断熱部材
１６ 空間
１７ 第２の断熱部材
１８ 受止部材 DESCRIPTION OF SYMBOLS 1 Image forming apparatus 2Y, 2C, 2M, 2K Image forming apparatus 3 Image carrier, intermediate transfer belt 4Y, 4C, 4M, 4K Photoconductor 7 Fixing apparatus 11 First heat exhausting member 13 Flow path 14 Forced exhaust apparatus 15 First 1 heat insulating member 16 space 17 second heat insulating member 18 receiving member

Claims (6)

トナー画像が形成される像担持体と、
前記像担持体上のトナー画像を媒体上に転写する転写装置と、
前記像担持体の下側に配置され前記媒体上で前記トナー画像を定着する定着装置と、
前記定着装置が発する熱を所定位置にある放熱部に導いて排出するヒートパイプからなる第１の排熱部材と、
前記定着装置を通過した後の前記媒体が発する熱及び水蒸気を、前記所定位置の放熱部に隣接した排出口に導いて排出する排出流路を形成する第２の排熱部材と、
前記第１の排熱部材と前記排出流路とを断熱する第１の断熱部材と、
前記第２の排熱部材の前記第１の排熱部材側とは反対側の外壁に設けた第２の断熱部材と、
を備え、
前記排出流路に面している前記第１の断熱部材の内壁及び前記第２の断熱部材の内壁それぞれぞれの下部に、前記定着装置を通過した後の前記媒体が発した水蒸気が結露して生じた水滴を受け止める受止部材が設けられている電子写真方式の画像形成装置。 An image carrier on which a toner image is formed;
A transfer device for transferring a toner image on the image carrier onto a medium;
A fixing device that is disposed below the image carrier and fixes the toner image on the medium;
A first heat exhaust member comprising a heat pipe that guides and discharges the heat generated by the fixing device to a heat radiating portion at a predetermined position;
A second heat exhaust member that forms a discharge flow path that guides and discharges heat and water vapor generated by the medium after passing through the fixing device to a discharge port adjacent to the heat radiating portion at the predetermined position;
A first heat insulating member that insulates the first heat exhaust member and the exhaust flow path;
A second heat insulating member provided on an outer wall opposite to the first heat exhausting member side of the second heat exhausting member;
With
The lower inner wall, respectively each of the inner wall and the second insulating member of the first heat insulating member facing the discharge passage, the medium is water vapor condensing emitted after passing through the fixing device An electrophotographic image forming apparatus provided with a receiving member for receiving water droplets generated in this manner. 複数の感光体にそれぞれ異なる色のトナー画像を形成する作像装置をさらに備え、
前記像担持体は、前記各トナー画像が重ね合わせて転写される無端状の中間転写ベルトである、請求項１に記載の画像形成装置。 An image forming device that forms toner images of different colors on a plurality of photoconductors;
The image forming apparatus according to claim 1, wherein the image carrier is an endless intermediate transfer belt onto which the toner images are transferred in an overlapping manner. 前記第２の排熱部材の熱及び水蒸気の排出流路内から前記排出口外に強制排気する強制排気装置を、さらに備えている請求項１又は２に記載の画像形成装置。   The image forming apparatus according to claim 1, further comprising a forced exhaust device that forcibly exhausts the heat and water vapor discharge flow path from the second exhaust heat member to the outside of the discharge port. 前記第１の断熱部材は、前記第２の排熱部材の前記第１の排熱部材側の隔壁である、請求項１〜３のいずれかの一に記載の画像形成装置。   The image forming apparatus according to claim 1, wherein the first heat insulating member is a partition wall on the first heat exhausting member side of the second heat exhausting member. 前記第２の排熱部材と前記第１の排熱部材との間に真空の空間が設けられている、請求項１〜４のいずれかの一に記載の画像形成装置。   The image forming apparatus according to claim 1, wherein a vacuum space is provided between the second heat exhaust member and the first heat exhaust member. 前記排出流路は上昇経路をとっている、請求項１〜５のいずれかの一に記載の画像形成装置。   The image forming apparatus according to claim 1, wherein the discharge flow path takes a rising path.
JP2004091637A 2004-03-26 2004-03-26 Image forming apparatus Expired - Fee Related JP4558364B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004091637A JP4558364B2 (en) 2004-03-26 2004-03-26 Image forming apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2004091637A JP4558364B2 (en) 2004-03-26 2004-03-26 Image forming apparatus

Publications (2)

Publication Number Publication Date
JP2005275253A JP2005275253A (en) 2005-10-06
JP4558364B2 true JP4558364B2 (en) 2010-10-06

Family

ID=35174957

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004091637A Expired - Fee Related JP4558364B2 (en) 2004-03-26 2004-03-26 Image forming apparatus

Country Status (1)

Country Link
JP (1) JP4558364B2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5298591B2 (en) * 2008-03-25 2013-09-25 富士ゼロックス株式会社 Image fixing and solidifying device and image forming apparatus
JP5585054B2 (en) * 2009-11-12 2014-09-10 富士ゼロックス株式会社 Exhaust device and image forming apparatus
JP7029673B2 (en) * 2018-05-14 2022-03-04 株式会社リコー Channel forming device and image forming device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01251072A (en) * 1988-03-31 1989-10-06 Toshiba Corp Image forming device
JPH0990855A (en) * 1995-09-22 1997-04-04 Canon Inc Fixing device and image forming device
JPH11338332A (en) * 1998-05-22 1999-12-10 Fuji Xerox Co Ltd Heat insulating device for image forming device
JP2000259064A (en) * 1999-03-10 2000-09-22 Fuji Xerox Co Ltd Heat discharging device and image forming device provided with the same
JP2003091189A (en) * 2001-09-17 2003-03-28 Ricoh Co Ltd Image forming apparatus
JP2003271044A (en) * 2002-03-13 2003-09-25 Canon Inc Image forming apparatus
JP2003337522A (en) * 2002-05-21 2003-11-28 Fuji Xerox Co Ltd Image forming apparatus

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01251072A (en) * 1988-03-31 1989-10-06 Toshiba Corp Image forming device
JPH0990855A (en) * 1995-09-22 1997-04-04 Canon Inc Fixing device and image forming device
JPH11338332A (en) * 1998-05-22 1999-12-10 Fuji Xerox Co Ltd Heat insulating device for image forming device
JP2000259064A (en) * 1999-03-10 2000-09-22 Fuji Xerox Co Ltd Heat discharging device and image forming device provided with the same
JP2003091189A (en) * 2001-09-17 2003-03-28 Ricoh Co Ltd Image forming apparatus
JP2003271044A (en) * 2002-03-13 2003-09-25 Canon Inc Image forming apparatus
JP2003337522A (en) * 2002-05-21 2003-11-28 Fuji Xerox Co Ltd Image forming apparatus

Also Published As

Publication number Publication date
JP2005275253A (en) 2005-10-06

Similar Documents

Publication Publication Date Title
JP4542729B2 (en) Image forming apparatus
US20060110172A1 (en) Image forming apparatus
JP5257753B2 (en) Image forming apparatus
JP2009103822A (en) Recording material cooling unit and image forming apparatus using the same
JP2012098677A (en) Cooler and image forming device
JP2008145636A (en) Fixing device and image forming apparatus
JP4801924B2 (en) Induction coil cooling device and image heating device
JP2005148290A (en) Image forming apparatus
JP5194457B2 (en) Cooling device for image forming apparatus
JP4715357B2 (en) Image forming apparatus
JP6965120B2 (en) Recording material cooling device
JP4558364B2 (en) Image forming apparatus
JP2012048058A (en) Image forming apparatus
JP5929380B2 (en) Paper cooling device and image forming apparatus
JP2007086310A (en) Image forming apparatus
JP2006285151A (en) Cooling device and image forming apparatus
JP5818131B2 (en) Cooling device and image forming apparatus
JP2009180759A (en) Air flow device for image forming apparatus and image forming apparatus equipped therewith
JP4360946B2 (en) Image forming apparatus
JP2005017762A (en) Fixing device and image forming apparatus
JP6032538B2 (en) Cooling device and image forming apparatus
JP2006276252A (en) Image forming apparatus
JP2005308844A (en) Image forming apparatus
JP4434878B2 (en) Image forming apparatus cooling apparatus and image forming apparatus
JP2006113344A (en) Image forming apparatus

Legal Events

Date Code Title Description
RD01 Notification of change of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7421

Effective date: 20051021

A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20061023

RD01 Notification of change of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7421

Effective date: 20070201

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20091109

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20091113

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100107

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100226

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100427

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100709

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100721

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130730

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees