JP2013242398A5 - Image forming apparatus - Google Patents
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- JP2013242398A5 JP2013242398A5 JP2012114820A JP2012114820A JP2013242398A5 JP 2013242398 A5 JP2013242398 A5 JP 2013242398A5 JP 2012114820 A JP2012114820 A JP 2012114820A JP 2012114820 A JP2012114820 A JP 2012114820A JP 2013242398 A5 JP2013242398 A5 JP 2013242398A5
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- 230000002093 peripheral Effects 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000003287 optical Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 230000003746 surface roughness Effects 0.000 claims description 3
- 230000001678 irradiating Effects 0.000 claims 1
- 239000002344 surface layer Substances 0.000 description 2
- 210000000078 Claw Anatomy 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- SCKXCAADGDQQCS-UHFFFAOYSA-N performic acid Chemical compound OOC=O SCKXCAADGDQQCS-UHFFFAOYSA-N 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Description
この発明は、電子写真プロセスで形成されるトナー画像を記録媒体に定着する定着装置を備えた画像形成装置に関する。 The present invention relates to an image forming apparatus including a fixing device that fixes a toner image formed by an electrophotographic process to a recording medium .
転写紙以外のシート状記録媒体としてしばしば用いられるオーバヘッドプロジェクタ用のプラスチックシートの場合にも勿論「筋状の傷」が発生し易い。 Of course, even in the case of a plastic sheet for an overhead projector that is often used as a sheet-like recording medium other than transfer paper, “striated scratches” are likely to occur.
これら特許文献に記載された対処方法のうち、特許文献１に開示された方法は、「表面状態の情報」を光学的に特定し、傷の発生した箇所において「トナーの付着量が多くなる」ように露光手段を制御するものである。 Among the countermeasures described in these patent documents, the method disclosed in Patent Document 1 optically specifies the “surface state information” and “increases the amount of toner attached” at the point where the scratch occurs. Thus, the exposure means is controlled.
この発明は、上述した事情に鑑みてなされたものであって、筋状の傷等を的確に検出し、検出された筋状の傷等の程度に応じて、定着部材の表面状態を改善することにより、定着部材の寿命を有効に延ばすことができる画像形成装置の実現を課題とする。 The present invention has been made in view of the above-described circumstances, and accurately detects streak-like scratches and improves the surface condition of the fixing member according to the degree of the detected streak-like scratches. Accordingly, an object of the present invention is to realize an image forming apparatus capable of effectively extending the life of the fixing member.
この発明の画像形成装置は、回転する定着部材と、該定着部材の外周面と当接し、通過する記録媒体上の未定着トナーを該記録媒体に定着させるニップ部を形成する加圧部材と、前記定着部材を加熱する加熱手段と、を有する定着装置を備えた画像形成装置であって、前記定着部材の表面状態情報を検出する表面状態情報検出装置と、前記定着部材の表面状態を変更する表面状態変更手段と、該表面状態変更手段を制御する表面状態変更制御装置と、を有し、前記表面状態情報検出装置は、前記定着部材の外周面に、当該定着部材の回転移動方向に交わる方向に複数の光スポットを形成し、各光スポットにおける反射光を受光して検知した複数の検知結果に基づいて、前記定着部材の外周面の表面状態情報を検出し、前記表面状態変更制御装置は、前記検出された前記表面状態情報に基づき前記表面状態変更手段を制御することを特徴する。 An image forming apparatus according to the present invention includes a rotating fixing member, a pressure member that contacts an outer peripheral surface of the fixing member, and forms a nip portion that fixes unfixed toner on the recording medium passing therethrough to the recording medium; An image forming apparatus including a fixing device including a heating unit that heats the fixing member, and a surface state information detecting device that detects surface state information of the fixing member; and a surface state of the fixing member. A surface state change control unit that controls the surface state change unit, and the surface state information detection device intersects the outer peripheral surface of the fixing member in the rotational movement direction of the fixing member. forming a plurality of light spots in the direction, based on a plurality of detection results detected by receiving the reflected light at each light spot, and detects the surface state information of the peripheral surface of the fixing member, the surface condition change control instrumentation It is characterized by controlling the surface state change means based on the detected the surface status information.
上記の如く、画像形成装置が備える定着装置は、回転する定着部材と、該定着部材の外周面と当接し、通過する記録媒体上の未定着トナーを該記録媒体に定着させるニップ部を形成する加圧部材と、前記定着部材を加熱する加熱手段と、を有する。 As described above, the fixing device included in the image forming apparatus forms a rotating fixing member and a nip portion that contacts the outer peripheral surface of the fixing member and fixes unfixed toner on the recording medium passing therethrough to the recording medium. A pressure member; and heating means for heating the fixing member.
この発明の画像形成装置は、電子写真プロセスにより１種以上のトナー画像を形成し、上記トナー画像をシート状記録媒体上に転写し、上記シート状記録媒体に担持されたトナー画像を、定着装置により上記シート状記録媒体に定着する画像形成装置であることができる。 The image forming apparatus of the present invention forms at least one toner image by an electrophotographic process, transfers the toner image onto a sheet-like recording medium, and fixes the toner image carried on the sheet-like recording medium to the fixing device. Thus, the image forming apparatus can be fixed to the sheet-like recording medium .
上記のように、この発明の画像形成装置によれば、表面状態情報検出装置により検出された表面状態情報に基づき、表面状態変更手段を制御するので、定着部材表面の傷を修復して、傷による短寿命化を有効に軽減するとともに、表面状態変更手段による定着部材表面の「摺擦による磨耗量」を必要に応じた量とすることにより「上記摺擦による定着部材の短寿命化」を有効に軽減して、定着部材の延命を図ることができる。 As described above, according to the image forming apparatus of the present invention, based on the surface condition information detected by the surface state information detecting device, and controls the surface state changing means, to repair the wound surface of the fixing member, scratches Effectively reduce the life of the fixing member by the surface condition changing means, and by setting the amount of wear on the surface of the fixing member by the surface condition changing means as required, it is possible to reduce the life of the fixing member by rubbing. It is possible to effectively reduce the life of the fixing member.
従って、かかる画像形成装置では、定着装置を長寿命化できるため、長期にわたって良好な画像形成を行なうことができる。 Accordingly, in such an image forming apparatus , since the life of the fixing device can be extended, good image formation can be performed over a long period of time.
定着装置１９は、図１（ｃ）に示すように所謂「ベルト定着方式」であり、定着を行なう部分は、図示の如く、定着部材としての定着ベルト６１とともに、加熱手段としての加熱ローラ６２、定着用ローラ６４、加圧部材としての加圧ローラ６３、テンションローラ６５、剥離爪６６、表面状態変更ローラ６７等を有している。 The fixing device 19 is a so-called “belt fixing method” as shown in FIG. 1 (c), and a fixing portion includes a fixing belt 61 as a fixing member , a heating roller 62 as a heating means, as shown in FIG . It has a fixing roller 64, a pressure roller 63 as a pressure member , a tension roller 65, a peeling claw 66, a surface state changing roller 67, and the like.
従って、定着ベルト６１の表面は「離型層をなすＰＦＡやＰＴＦＥなどの樹脂」であり、その表面の情報（表面状態情報）が検出の対象である。
表面状態情報は、以下において単に「表面情報」とも言う。
Therefore, the surface of the fixing belt 61 is “resin such as PFA or PTFE forming a release layer”, and information on the surface (surface state information) is a detection target.
The surface state information is also simply referred to as “surface information” below.
加圧手段である加圧ローラ６３は、定着用ローラ６４と対向する位置で、定着ベルト６１に圧接する。この圧接は、定着用ローラ６４を変形させ「ニップ部」を形成する。このニップ部が定着部となる。 The pressure roller 63 as a pressure unit is in pressure contact with the fixing belt 61 at a position facing the fixing roller 64. This pressure contact deforms the fixing roller 64 to form a “nip portion”. This nip portion becomes a fixing portion.
表面状態変更手段としての表面状態変更ローラ６７は、金属の芯金に「所定の粗さを有する表層」を有するものである。「表層」は、例えば数１０μｍオーダの凹凸形状を有しており、その表面粗さは定着ベルト６１の表面粗さより大きく、表面状態変更ローラ６７を定着ローラ６１の表面に接触させて回転させると、表面状態変更ローラ６７による摺擦により、定着ローラ６７の表面は粗らされて表面部分が削られ「新たな面」が露呈する。 The surface state change roller 67 as the surface state change means has a “surface layer having a predetermined roughness” on a metal cored bar. The “surface layer” has a concavo-convex shape on the order of several tens of μm, for example, and the surface roughness is larger than the surface roughness of the fixing belt 61, and when the surface state changing roller 67 is brought into contact with the surface of the fixing roller 61 and rotated. By the rubbing by the surface state changing roller 67, the surface of the fixing roller 67 is roughened and the surface portion is scraped to expose a “new surface”.
さて、図１に示す画像形成装置（カラープリンタ１００）は、定着装置１９が、定着部材（定着ベルト６４）の表面情報を検出する「表面状態情報検出装置」を有する。
「表面状態情報検出装置」は、以下において「表面情報検出装置」とも言う。
The image forming apparatus (color printer 100) shown in FIG. 1 has a “surface state information detecting device” in which the fixing device 19 detects surface information of the fixing member (fixing belt 64).
The “surface state information detection device” is also referred to as “surface information detection device” below.
表面状態情報検出装置は「定着部材の外周面に、定着部材の回転移動方向に交わる方向に複数の光スポットを形成し、各光スポットにおける反射光を受光して検知した複数の検知結果に基づき、定着部材の外周面の表面状態情報を検出する」もので、「反射型光学検知装置」と「複数の検知結果に基づき定着部材表面の表面情報を検出する表面情報検出部」とを有する。 The surface state information detection device “ based on a plurality of detection results formed by forming a plurality of light spots on the outer peripheral surface of the fixing member in a direction crossing the rotational movement direction of the fixing member and receiving reflected light at each light spot. ”Detects surface state information on the outer peripheral surface of the fixing member”, and includes a “reflective optical detection device ” and a “surface information detection unit for detecting surface information on the surface of the fixing member based on a plurality of detection results”.
表面状態変更ローラ６７は、図１（ｃ）には示されていない駆動手段により「転写ベルト６１への接離と摺擦駆動」を行なうようになっている。
図示されない駆動手段と表面状態変更ローラ６７とは「表面状態変更手段」を構成し、上記駆動手段は表面状態変更制御装置４００により制御されるようになっている。
The surface state changing roller 67 is configured to perform “contact / separation with the transfer belt 61 and sliding driving” by driving means not shown in FIG.
The driving means (not shown) and the surface state changing roller 67 constitute “ surface state changing means ”, and the driving means is controlled by the surface state changing control device 400.
このような「傷やオフセットの生じた表面の状態」、即ち、オフセットの有無や程度、傷の状態や位置」が表面状態であり「表面状態情報（表面情報）」である。 Such a “surface state in which scratches and offsets have occurred”, that is, the presence / absence and degree of offset, and the state and position of scratches, is a surface state and is “ surface state information (surface information) ”.
図２の例では、検出領域Ａは、余裕幅：Ｗ１、Ｗ２のうち「余裕幅：Ｗ２を含む」ように設定され、余裕幅：Ｗ１のある側には設けられていない。これは、筋状の傷の発生は、余裕幅：Ｗ１の領域と余裕幅：Ｗ２の領域とで、略同様に起こるであろうと考えられ、一方の余裕幅内での検出で実用上は十分であると考えられるからである。 In the example of FIG. 2, the detection area A is set to “ include the margin width: W2 ” out of the margin widths: W1 and W2, and is not provided on the side where the margin width: W1 is present. It is considered that the occurrence of streak-like scratches will occur in substantially the same manner in the margin width: W1 region and the margin width: W2 region, and detection within one margin width is practically sufficient. This is because it is considered.
次に、表面状態変更手段による「定着ベルト表面状態の変更」を説明する。 Next, “change of fixing belt surface state” by the surface state changing means will be described.
また、表面状態変更手段を「定着部材表面に接して表面を摺擦する時間を制御」することで「傷レベルに応じた表面状態変更」が可能になる。 Further, the “surface state change according to the scratch level” can be performed by controlling the time during which the surface state changing means is in contact with the fixing member surface and rubs the surface.
Claims (14)
前記定着部材の表面状態情報を検出する表面状態情報検出装置と、
前記定着部材の表面状態を変更する表面状態変更手段と、
該表面状態変更手段を制御する表面状態変更制御装置と、を有し、
前記表面状態情報検出装置は、前記定着部材の外周面に、当該定着部材の回転移動方向に交わる方向に複数の光スポットを形成し、各光スポットにおける反射光を受光して検知した複数の検知結果に基づいて、前記定着部材の外周面の表面状態情報を検出し、
前記表面状態変更制御装置は、前記検出された前記表面状態情報に基づき前記表面状態変更手段を制御することを特徴する画像形成装置。 A rotating fixing member; a pressure member that forms a nip portion that abuts the outer peripheral surface of the fixing member and fixes unfixed toner on the passing recording medium to the recording medium; and a heating unit that heats the fixing member An image forming apparatus including a fixing device having
A surface state information detecting device for detecting surface state information of the fixing member;
Surface state changing means for changing the surface state of the fixing member;
A surface state change control device for controlling the surface state change means,
The surface condition information detection device forms a plurality of light spots on the outer peripheral surface of the fixing member in a direction intersecting the rotational movement direction of the fixing member, and receives a plurality of detections by detecting reflected light at each light spot. Based on the result, the surface state information of the outer peripheral surface of the fixing member is detected,
The image forming apparatus, wherein the surface state change control device controls the surface state change unit based on the detected surface state information.
前記表面状態変更手段は、前記定着部材の表面の粗さよりも粗い表面を持ち、前記定着部材の外周面に接離可能に設けられ、前記定着部材の外周面を摺擦することにより表面状態を変更することを特徴とする画像形成装置。The surface state changing means has a surface rougher than the surface roughness of the fixing member, is provided so as to be able to contact and separate from the outer peripheral surface of the fixing member, and the surface state is changed by rubbing the outer peripheral surface of the fixing member. An image forming apparatus that is changed.
表面状態情報検出装置により検出される定着部材表面の表面状態情報が、筋状の傷の傷レベルと搬送方向に直交する方向の位置に関する情報であることを特徴とする画像形成装置。 The image forming apparatus according to claim 2.
An image forming apparatus , wherein the surface state information on the surface of the fixing member detected by the surface state information detection device is information on a flaw level of a line-shaped flaw and a position in a direction orthogonal to the conveyance direction.
表面状態変更制御手段が、検出された傷レベルに関する情報に応じて、表面状態変更手段の定着部材表面への接触時間を制御することを特徴とする画像形成装置。 The image forming apparatus according to claim 3.
An image forming apparatus , wherein the surface state change control unit controls a contact time of the surface state change unit with the surface of the fixing member in accordance with information on the detected scratch level.
表面状態変更手段が、少なくとも筋状の傷の、搬送方向に直交する方向の位置の近傍において、定着部材の表面状態を変更することを特徴とする画像形成装置。 The image forming apparatus according to any one of claims 2 to 4, wherein
An image forming apparatus , wherein the surface state changing means changes the surface state of the fixing member at least in the vicinity of the position of the streak-like scratch in the direction perpendicular to the conveying direction.
表面状態変更手段が、定着部材表面の搬送方向に直交する方向の全域に亘って、定着部材の表面状態を変更することを特徴とする画像形成装置。 The image forming apparatus according to claim 5.
An image forming apparatus , wherein the surface state changing means changes the surface state of the fixing member over the entire region in the direction orthogonal to the conveying direction of the surface of the fixing member.
表面状態変更制御装置が、表面状態情報検出装置を制御する機能を有し、表面状態変更手段による表面状態変更と同時もしくは変更ののちに、さらに表面状態情報検出装置による定着部材の表面情報の検出を行なうことを特徴とする画像形成装置。 The image forming apparatus according to any one of claims 1 to 6,
The surface state change control device has a function of controlling the surface state information detection device , and at the same time or after the surface state change by the surface state change means , further detects the surface information of the fixing member by the surface state information detection device. An image forming apparatus .
表面状態変更手段による表面状態変更ののちに、さらに表面状態情報検出装置による定着部材の表面情報の検出を行ない、検出された表面情報に応じて、表面状態の変更を行なうことを特徴とする画像形成装置。 The image forming apparatus according to claim 7.
On after the surface state change by the surface state changing means further performs detection of the surface information of the fixing member by the surface state information detecting device, in accordance with the detected surface information, images, characterized in that to change the surface state Forming equipment .
表面状態情報検出装置において、複数の光スポットを定着部材表面に照射する反射型光学検知装置が、上記定着部材における搬送方向に交わる方向へ複数の光スポットを順次に照射することを特徴とする画像形成装置。 The image forming apparatus according to any one of claims 2 to 8,
In surface state information detecting device, an image reflective optical sensing device for irradiating a plurality of light spots on the surface of the fixing member, characterized in that illuminating the plurality of light spots in the direction intersecting the conveying direction sequentially in the fixing member Forming equipment .
表面状態情報検出装置において、複数の光スポットを定着部材表面に照射する反射型光学検知装置が、上記定着部材における搬送方向に直交する横行と異なる方向へ複数の光スポットを照射することを特徴とする画像形成装置。 The image forming apparatus according to any one of claims 2 to 9,
In the surface state information detection device , the reflection type optical detection device that irradiates the surface of the fixing member with a plurality of light spots irradiates the plurality of light spots in a direction different from the transverse direction perpendicular to the conveying direction in the fixing member. Image forming apparatus .
搬送方向に幅の異なる複数サイズのシート状記録媒体へのトナー画像の定着が可能であり、表面状態情報検出装置による検出部位を、最大サイズでないシート状記録媒体の幅方向端部を含む該幅方向端部近傍に設定したことを特徴とする画像形成装置。 The image forming apparatus according to any one of claims 2 to 10, wherein
The toner image can be fixed on a plurality of sizes of sheet-like recording media having different widths in the transport direction, and the detection portion by the surface state information detection device includes the width-direction end of the sheet-like recording medium that is not the maximum size. An image forming apparatus characterized in that it is set in the vicinity of a direction end.
表面状態情報検出装置が１つの反射型光学検知手段を有することを特徴とする画像形は成装置。 The image forming apparatus according to any one of claims 2 to 11,
An image shape forming apparatus characterized in that the surface state information detecting device has one reflection type optical detecting means .
定着部材が定着ベルトであることを特徴とする画像形成装置。 The image forming apparatus according to any one of claims 2 to 12,
An image forming apparatus , wherein the fixing member is a fixing belt.
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| JP6167618B2 (en) * | 2012-11-15 | 2017-07-26 | 株式会社リコー | Image forming apparatus |
| JP6051807B2 (en) * | 2012-11-22 | 2016-12-27 | コニカミノルタ株式会社 | Image forming apparatus |
| JP5832598B2 (en) | 2013-09-03 | 2015-12-16 | キヤノン株式会社 | Image heating apparatus and image forming apparatus |
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| JP6458450B2 (en) * | 2014-05-09 | 2019-01-30 | 株式会社リコー | Fixing apparatus and image forming apparatus |
| JP6270620B2 (en) | 2014-05-16 | 2018-01-31 | キヤノン株式会社 | Image forming apparatus |
| JP2015219456A (en) * | 2014-05-20 | 2015-12-07 | 株式会社リコー | Fixation system and image forming apparatus |
| JP2016004171A (en) * | 2014-06-17 | 2016-01-12 | 株式会社リコー | Fixing apparatus and image forming apparatus |
| US9431445B2 (en) | 2014-08-01 | 2016-08-30 | Ricoh Company, Ltd. | Reflective optical sensor, image forming apparatus, and surface information detecting method |
| JP6406543B2 (en) * | 2014-10-16 | 2018-10-17 | 株式会社リコー | Image forming apparatus and object processing apparatus. |
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| JPH05113739A (en) * | 1991-03-15 | 1993-05-07 | Canon Inc | Image forming device |
| JP3065798B2 (en) * | 1992-07-10 | 2000-07-17 | キヤノン株式会社 | Image forming device |
| JPH06118007A (en) * | 1992-10-08 | 1994-04-28 | Fuji Xerox Co Ltd | Method and device for inspecting defect on cylinder surface |
| JP4632820B2 (en) * | 2005-03-09 | 2011-02-16 | 株式会社リコー | Image forming apparatus |
| JP2007034068A (en) * | 2005-07-28 | 2007-02-08 | Ricoh Co Ltd | Fixing device and image forming apparatus |
| JP2008268524A (en) * | 2007-04-19 | 2008-11-06 | Canon Inc | Image heating device |
| JP5262496B2 (en) * | 2008-03-18 | 2013-08-14 | 株式会社リコー | Toner concentration detection method, reflection type optical sensor device, and image forming apparatus |
| JP5063438B2 (en) * | 2008-03-27 | 2012-10-31 | シャープ株式会社 | Fixing apparatus and image forming apparatus |
| JP2010191275A (en) * | 2009-02-19 | 2010-09-02 | Canon Inc | Image heating device |
| JP2010262023A (en) * | 2009-04-30 | 2010-11-18 | Konica Minolta Business Technologies Inc | Image forming apparatus |
| JP5515695B2 (en) * | 2009-12-02 | 2014-06-11 | コニカミノルタ株式会社 | Image forming apparatus and image forming system |
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