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    • 1. 发明专利
    • 定着装置及び画像形成装置
    • 固定装置和图像形成装置
    • JP2015041045A
    • 2015-03-02
    • JP2013172955
    • 2013-08-23
    • 株式会社リコーRicoh Co Ltd
    • YAMAMOTO TAKESHIKISHI KAZUTOSAMEI MASAHIROFUJIMOTO IPPEIKAWABATA KEISUKESHIMIZU MISAKIISHIGAYA YASUNORI
    • G03G15/20
    • 【課題】加熱手段と押圧部材との位置決め精度を高めて加熱効率の低下を低減することができる定着装置、及び、その定着装置を備えた画像形成装置を提供する。【解決手段】回転可能に設けられた無端状の定着ベルト38と、定着ベルトの外周面に接触させて定着ベルトとの間にニップ部を形成する接触部材30と、定着ベルトのニップ部を形成している部分以外に接触させて設けられ定着ベルトを加熱する加熱手段56と、定着ベルトを介して加熱手段と対向する位置に設けられ定着ベルトを押圧する押圧部材40とを備え、前記ニップ部に通過させた記録材上の未定着画像を少なくとも熱によって記録材に定着させる定着装置12において、加熱手段と押圧部材とを単一の位置決め部材54に取り付けた。【選択図】図1
    • 要解决的问题:提供一种可以提高加热装置和压力构件的定位精度以降低加热效率的定影装置,以及包括定影装置的图像形成装置。解决方案:定影装置12包括 可旋转地设置的环形定影带38,与定影带的外周面接触以在定影带和接触构件之间形成咬合部的接触构件30,与定影带和接触构件之间形成咬合部的加热装置56, 除了形成夹持部分的部分之外的定影带的一部分以加热定影带;以及压力构件40,其设置在与加热装置相对的位置处,其间具有定影带以按压定影带; 并将至少通过加热装置和压力构件附接到单个定位构件54上的经过夹持部分的记录材料上的未定影图像固定到记录材料上。
    • 3. 发明专利
    • 定着装置及び画像形成装置
    • 固定装置和图像形成装置
    • JP2015014704A
    • 2015-01-22
    • JP2013141323
    • 2013-07-05
    • 株式会社リコーRicoh Co Ltd
    • NAKAJIMA YUKIKOKISHI KAZUTOYAMAMOTO TAKESHIFUJIMOTO IPPEISAMEI MASAHIROSHIMIZU MISAKIKAWABATA KEISUKE
    • G03G15/20
    • 【課題】定着ベルトの昇温速度が遅くなるのを抑制できる定着装置及び画像形成装置を提供する。【解決手段】回転可能に設けられた無端状の定着ベルトと、回転可能に設けられ定着ベルトの外周面に接触させて定着ベルトとの間にニップ部を形成する接触部材と、基材と、基材に設けられ電力が供給されることで発熱する発熱体とを有し、定着ベルトを加熱する加熱手段と、定着ベルトを介して加熱手段と対向する位置に設けられ定着ベルトを押圧する押圧部材とを備え、前記ニップ部に通過させた記録材上の未定着画像を少なくとも熱によって記録材に定着させる定着装置において、加熱手段の定着ベルト回転方向で発熱体領域以外の領域に、定着ベルトと押圧部材との間での伝熱を阻害する伝熱阻害手段を設けた。【選択図】図1
    • 要解决的问题:提供一种能够抑制定影带的升温速度降低的定影装置,并提供图像形成装置。解决方案:定影装置包括:可旋转环形定影带; 可旋转接触构件,其通过接触所述定影带的外周表面与所述定影带形成辊隙; 加热装置,其具有设置在基座上的基座和发热体,并且在供给电力时加热定影带而产生热量; 设置在与所述加热装置相对的位置处的定影带,其间插入有所述定影带以按压所述定影带; 以及传热防止装置,其在所述定影带的旋转方向上设置在所述加热装置的发热体区域以外的区域中,以防止所述定影带与所述压力构件之间的热传递。 在定影装置中,通过压区的记录材料上的未定影图像至少通过热固定到记录材料上。
    • 6. 发明专利
    • Fixing device and image forming apparatus
    • 固定装置和图像形成装置
    • JP2014170225A
    • 2014-09-18
    • JP2014021239
    • 2014-02-06
    • Ricoh Co Ltd株式会社リコー
    • YAMAMOTO TAKESHIKISHI KAZUTOWAIDA TAKUMISAMEI MASAHIROONO HIROSHIFUJIMOTO IPPEISEO HIROSHIYAMASHINA RYOTAISHIGAYA YASUNORIYOSHINAGA HIROSHIARAI YUJIMINBU RYUICHIYAMAGUCHI YOSHINORIIKEFUCHI YUTAKANAKAJIMA YUKIKOYUASA SHUTAROKAWABATA KEISUKEHATTORI YOSHIOSAITO KAZUYASHIMOKAWA TOSHIHIKO
    • G03G15/20
    • G03G15/2042G03G2215/2035
    • PROBLEM TO BE SOLVED: To provide a fixing device which is capable of saving power by reducing the amount of heat radiated from the surface of a fixing belt and to provide an image forming apparatus.SOLUTION: A fixing device 12 includes an endless fixing belt 38 rotatably provided, a contact member 30 rotatably provided and brought into contact with the outer peripheral surface of the fixing belt, to form a nip part SN between the contact member 30 and the fixing belt, and heating means 56 provided in contact with the inner peripheral surface of the fixing belt and heating the fixing belt. The heating means includes a plurality of heat sources 55 in the width direction of a recording material orthogonal to the conveyance direction of the recording material, and changes a heating region by each heat source, to heat the fixing belt, according to an unfixed image on the recording material, based on image data, so that the unfixed image on the recording material passed through the nip part is fixed to the recording material by at least the heat. In the fixing device 12, the heating means is provided in a part excluding the part of the fixing belt forming the nip part.
    • 要解决的问题:提供一种定影装置,其能够通过减少从定影带的表面辐射的热量来节省电力并提供图像形成装置。解决方案:定影装置12包括环形定影带38 可旋转地设置有可旋转地设置并与定影带的外周面接触的接触构件30,以在接触构件30和定影带之间形成咬合部SN,以及与内周面接触的加热装置56 定影带的表面并加热定影带。 加热装置包括在与记录材料的传送方向正交的记录材料的宽度方向上的多个热源55,并且根据每个热源改变加热区域,以根据未定影的图像加热定影带 记录材料基于图像数据,使得通过夹持部分的记录材料上的未定影图像至少被热固定到记录材料上。 在定影装置12中,加热装置设置在除了形成压区部分的定影带的部分之外的部分中。
    • 7. 发明专利
    • Fixing device and image forming apparatus
    • 固定装置和图像形成装置
    • JP2014170217A
    • 2014-09-18
    • JP2013261337
    • 2013-12-18
    • Ricoh Co Ltd株式会社リコー
    • SAMEI MASAHIROWAIDA TAKUMIONO HIROSHIYAMAMOTO TAKESHIFUJIMOTO IPPEISEO HIROSHIISHIGAYA YASUNORIKISHI KAZUTOYAMASHINA RYOTA
    • G03G15/20
    • G03G15/2039G03G2215/2035
    • PROBLEM TO BE SOLVED: To achieve a fixing device with improved multifunctionality.SOLUTION: A heating member 23 is constituted of a plurality of heating elements 32 arranged in a width direction of a recording medium P. When an unfixed image on the sheet P supplied to a nip part N has an image area and a non-image area, heating control means 26 controls power supplied to the respective heating elements 32 so that, of the plurality of heating elements 32, the heating element 32 corresponding to the image area X becomes high temperature, and the heating element 32 corresponding to the non-image area Y becomes low temperature. The heating control means 26 temporarily shifts an area on a fixing belt 21 corresponding to the non-image area to a temperature different from its normal temperature on the basis of information other than image information.
    • 要解决的问题:实现具有改进的多功能性的定影装置。解决方案:加热构件23由沿记录介质P的宽度方向布置的多个加热元件32构成。当片材P上的未定影图像被提供给 夹持部分N具有图像区域和非图像区域,加热控制装置26控制供应到各个加热元件32的电力,使得多个加热元件32中对应于图像区域X的加热元件32变为 对应于非图像区域Y的加热元件32变为低温。 加热控制装置26基于除图像信息之外的信息,临时将对应于非图像区域的定影带21上的区域移动到与其常温不同的温度。
    • 8. 发明专利
    • Fixing device, and image forming apparatus
    • 固定装置,以及图像形成装置
    • JP2013130891A
    • 2013-07-04
    • JP2013077011
    • 2013-04-02
    • Ricoh Co Ltd株式会社リコー
    • YAMAMOTO TAKESHI
    • G03G15/20G03G21/14
    • PROBLEM TO BE SOLVED: To provide a fixing device that achieves both high accuracy in feedback control of a fixing temperature and prevention of a flicker phenomenon of a lighting device such as a fluorescent light without slowing down a reduction in warm-up time of the device, even in the case where a fixing member is heated with a first heater and a pressure member is heated with a second heater; and an image forming apparatus.SOLUTION: A fixing device comprises: a fixing member 21 heated by a first heater 25; and a pressure member 31 heated by a second heater 34. The first heater 25 is controlled by a PID controller 51, and the second heater 34 is controlled by an on/off controller 53.
    • 要解决的问题:提供一种定影装置,其能够实现定影温度的反馈控制的高精度和防止诸如荧光灯的照明装置的闪烁现象,而不会减缓装置的预热时间的减少 即使在用第一加热器加热固定构件并且用第二加热器加热压力构件的情况下, 和图像形成装置。解决方案:定影装置包括:由第一加热器25加热的固定构件21; 以及由第二加热器34加热的压力构件31.第一加热器25由PID控制器51控制,第二加热器34由开/关控制器53控制。
    • 9. 发明专利
    • Image forming apparatus
    • 图像形成装置
    • JP2013057859A
    • 2013-03-28
    • JP2011196993
    • 2011-09-09
    • Ricoh Co Ltd株式会社リコー
    • YAMAMOTO TAKESHIHIROSE FUMIHIRO
    • G03G15/20
    • PROBLEM TO BE SOLVED: To reduce waiting time required for decreasing temperature of a fixing member to suppress a reduction in productivity.SOLUTION: A fixing heater 64 is controlled so that surface temperature of a fixing belt 61 becomes predetermined temperature on the basis of an output value of temperature detection means 70 arranged near a heating roller 63. When the surface temperature of the fixing belt 61 detected by the temperature detection means 70 is higher than target temperature (preset temperature) in a state where a sheet sensor 71 has not detected a sheet, compression air is injected toward a fixing member from a nozzle 80 to reduce time for the surface temperature to become the predetermined temperature (to be decreased to the preset temperature).
    • 解决的问题:减少固定部件的温度降低所需的等待时间,以抑制生产率的降低。 解决方案:根据设置在加热辊63附近的温度检测装置70的输出值,定影加热器64被控制成使定影带61的表面温度成为预定温度。当定影带的表面温度 在片材传感器71未检测到片材的状态下,由温度检测装置70检测出的温度(61)高于目标温度(预设温度),压缩空气从喷嘴80向固定部件注入,以减少表面温度的时间 成为预定温度(降低到预设温度)。 版权所有(C)2013,JPO&INPIT
    • 10. 发明专利
    • Fixing device and image forming device
    • 固定装置和图像形成装置
    • JP2012163752A
    • 2012-08-30
    • JP2011023780
    • 2011-02-07
    • Ricoh Co Ltd株式会社リコー
    • YAMAMOTO TAKESHISUZUKI NAOTOHIROSE FUMIHIRO
    • G03G15/20G03G21/00G03G21/14
    • PROBLEM TO BE SOLVED: To provide a non-contact separation fixing device allowing removal of jammed paper without damaging or contaminating a separation member or a fixing member when jammed paper is removed at the occurrence of a multi-feed, the fixing device blowing compressed gas between toner-fixed paper and a fixing member to separate the paper.SOLUTION: A fixing device includes a fixing member with a heating source and a pressure member configured to move close to or away from the fixing member to press the fixing member, and conveys a recording medium with an unfixed toner image carried thereon to a fixing nip formed by the fixing member and the pressure member to fix the toner image on the recording medium. At least one compressed gas jetting means is provided for jetting the compressed gas from a fixing nip outlet-side in the fixing nip direction along the fixing member. When the recording medium is jammed during fixing, the pressure member is separated from the fixing member, and the compressed gas is jetted for predetermined time from the compressed gas jetting means.
    • 要解决的问题:为了提供一种非接触分离固定装置,当多次进给发生时,当卡住的纸被去除时,允许去除卡住的纸而不损坏或污染分离部件或固定部件,固定装置 在调色剂固定纸和固定构件之间吹送压缩气体以分离纸张。 解决方案:固定装置包括具有加热源的固定构件和构造成移动靠近或远离固定构件的压力构件以按压固定构件,并将其上承载有未定影调色剂图像的记录介质输送到 由固定构件和压力构件形成的定影夹持件,用于将调色剂图像定影在记录介质上。 提供至少一个压缩气体喷射装置,用于沿着固定构件在定影夹紧方向上从定影辊隙出口侧喷射压缩气体。 当记录介质在固定期间卡住时,压力构件与固定构件分离,压缩气体从压缩气体喷射装置喷射预定时间。 版权所有(C)2012,JPO&INPIT