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1. 发明专利

JP2005062654A Fixing device and image forming apparatus 审中-公开
标题翻译：固定装置和图像形成装置
公开(公告)号：JP2005062654A
公开(公告)日：2005-03-10
申请号：JP2003294990
申请日：2003-08-19
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NAGAFUJI HIDEO
IPC分类号： G03G15/20 , F16C13/00
摘要： PROBLEM TO BE SOLVED: To provide a fixing device which can enhance the mechanical strength of a core bar without using a special reinforcing member without sacrificing the startup time of the device and an image forming apparatus equipped with the fixing device.
SOLUTION: The fixing device is equipped with a fixing roller 12 and a pressure roller 13. The pressure roller 13 has the cylindrical core bar 21 and is provided with a plurality of projections 27 on the inner peripheral surface of the core bar 21.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：解决的问题：提供一种可以在不牺牲设备的启动时间的情况下提高芯棒的机械强度而不使用特殊的加强构件的定影装置和配备有定影装置的图像形成装置。解决方案：定影装置配备有定影辊12和加压辊13.加压辊13具有圆筒形芯棒21，并且在芯棒21的内周面上设置有多个突起27 （C）2005，JPO＆NCIPI

2. 发明专利

JP2005004133A Fixing device and image forming apparatus 审中-公开
标题翻译：固定装置和图像形成装置
公开(公告)号：JP2005004133A
公开(公告)日：2005-01-06
申请号：JP2003170460
申请日：2003-06-16
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NAGAFUJI HIDEO
IPC分类号： G03G15/20
摘要： PROBLEM TO BE SOLVED: To provide a fixing device and an image forming device capable of preventing the occurrence of a jam in a sheet material after the end of fixing.
SOLUTION: The fixing device is equipped with a fixing roller 12 which is rotationally driven, a pressure roller 13 which comes in press-contact with the fixing roller 12, a paper delivery roller pair 22 which delivers the sheet material S after the end of fixing, and a transport guide 23. A nip 14 is formed between the fixing roller 12 and the pressure roller 13 and the transport guide 23 guides the sheet material S past the nip 14 toward the paper delivery roller pair 22. The angle formed by a straight line connecting the nip 14 formed between the fixing roller 12 and the pressure roller 13 and a nip 26 of the paper delivery roller pair 22 and the transport surface of the transport guide 23 is so set as to fall within a range from 15 to 30°.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种能够防止在固定结束后在片材中发生卡纸的定影装置和图像形成装置。解决方案：定影装置配备有旋转驱动的定影辊12，与定影辊12压接的加压辊13，在其后传送片材S的送纸辊对22 固定端部和输送引导件23.在定影辊12和加压辊13之间形成有辊隙14，并且输送引导件23将片材S经过辊隙14朝向纸张输送辊对22引导。形成的角度通过将形成在定影辊12和加压辊13之间的辊隙14和送纸辊对22的辊隙26和输送导向件23的输送面连接的直线设定为15° 至30°。版权所有（C）2005，JPO＆NCIPI

3. 发明专利

JP2004270847A Image forming device 审中-公开
公开(公告)号：JP2004270847A
公开(公告)日：2004-09-30
申请号：JP2003064243
申请日：2003-03-10
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NAGAFUJI HIDEO
IPC分类号： G03G15/20 , F16B25/00 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To provide an image forming device achieving favorable gear sliding performance without enlarging the diameter of a resin shaft in a gear sliding range even in tightening a screw, in constitution using the resin shaft for a gear shaft, in which a part is fastened to the resin shaft while self-tapping.
SOLUTION: This image forming device comprises a constitution in which the resin shaft 18 is used for the gear shaft to be incorporated with a resin part, and in which the part is fastened to the resin shaft 18 by the screw 20 that is fastened while self-tapping. Hole diameter of a hole 18b in the resin shaft 18 to which the screw 20 is driven is set to be larger than outer diameter of the screw 20 in the gear sliding range, and in such size that the screw can be fastened on the depth side of the gear sliding range.
COPYRIGHT: (C)2004,JPO&NCIPI

4. 发明专利

JP2017083520A 定着装置及び画像形成装置审中-公开
公开(公告)号：JP2017083520A
公开(公告)日：2017-05-18
申请号：JP2015208824
申请日：2015-10-23
申请人：株式会社リコー , Ricoh Co Ltd
发明人： YOSHIURA ARINOBU , NAGAFUJI HIDEO , UTSUNOMIYA KOICHI , IKEBUCHI YUTAKA , YAMANO MOTOYOSHI
IPC分类号： G03G15/20
CPC分类号： G03G15/2025 , G03G15/2075
摘要：【課題】低摩擦部材からの潤滑剤の枯渇を防止して、定着部材の搬送不良や寿命低下を抑制する。【解決手段】定着装置は、定着ベルト201と、定着ベルトの内部に配設されたニップ形成部材206と、加圧ローラ203と、潤滑剤を含浸した低摩擦シート210を備えている。定着ベルト201の内面には吸熱剤220が塗装されており、定着ベルト201からの潤滑剤の流出を抑制する凹凸部221が吸熱剤220に設けられている。低摩擦シート210から漏出した潤滑剤が凹凸部221によってせき止められる。これにより、潤滑剤の枯渇が抑制され、定着ベルトの搬送不良や寿命の低下を抑えることができる。【選択図】図8

5. 发明专利

JP2005001862A Roller unit and fixing device 有权
标题翻译：滚动单元和固定装置
公开(公告)号：JP2005001862A
公开(公告)日：2005-01-06
申请号：JP2003169424
申请日：2003-06-13
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NAGAFUJI HIDEO
IPC分类号： B65H5/06
摘要： PROBLEM TO BE SOLVED: To provide a roller unit preventing a driven roller from slipping out of a bearing in simple constitution even when load is applied to the driven roller, and a fixing device.
SOLUTION: This roller unit includes: a paper delivery roller 20; the driven roller 21 abutting on the paper delivery roller 20; and bearings 23, 25 bearing both ends of a shaft 22 of the driven roller 21. Two or more bearings 23, 25 are provided, and the respective bearings 23, 25 are adapted to support the shaft 22 of the driven roller 21 in different directions.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种滚子单元，即使在向从动辊施加载荷时也能以简单的结构防止从动辊从轴承滑出，以及定影装置。
解决方案：该辊单元包括：送纸辊20; 从动辊21抵靠在纸张输送辊20上; 以及轴承23,25，其承载从动辊21的轴22的两端。设置有两个或更多个轴承23,25，并且相应的轴承23,25适于以不同的方向支撑从动辊21的轴22 。版权所有（C）2005，JPO＆NCIPI

6. 发明专利

JP2004271549A Electrophotographic system 审中-公开
公开(公告)号：JP2004271549A
公开(公告)日：2004-09-30
申请号：JP2003057860
申请日：2003-03-04
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NAGAFUJI HIDEO
IPC分类号： G03G15/20 , B65H5/38 , G03G15/00
摘要： PROBLEM TO BE SOLVED: To provide an electrophotographic system having high image quality, which does not form an abnormal image such as scattering or a black stripe without causing irregularity in a halftone image (graphic image) even when a carrying guide plate rubs transfer paper by setting mold temperature in molding to be high and the surface roughness of the carrying surface of the carrying guide plate to Ra≤0.8μm. SOLUTION: In the electrophotographic system equipped with a fixing device 10 having the carrying guide plate 17 as a fixing entrance guide plate, the plate 17 is made of heat resistant resin and the surface roughness of the carrying surface 17a of the plate 17 is Ra≤0.8μm. COPYRIGHT: (C)2004,JPO&NCIPI

7. 发明专利

JP2004086092A Printer device 审中-公开
公开(公告)号：JP2004086092A
公开(公告)日：2004-03-18
申请号：JP2002250145
申请日：2002-08-29
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NAGAFUJI HIDEO
IPC分类号： B41J29/38 , G03G15/20 , G03G21/00
摘要： PROBLEM TO BE SOLVED: To provide a printer device which uses toner and reduces power consumption while maintaining the fixing property of an image. SOLUTION: The printer device is equipped with an ambient temperature detection means (first thermistor 12) for detecting ambient temperature, an image data amount decision means (print data lightness and heaviness decision part 31) for deciding the amount of image data to be printed out, a heating means (halogen heater 8d) for heating a fixing device for heating and fixing a toner image on transfer paper, and a heating temperature control means (fixing roller heating control part 34) for controlling the heating temperature of the heating means in accordance with the ambient temperature detected by the ambient temperature detection means and the amount of the image data decided by the image data amount decision means. COPYRIGHT: (C)2004,JPO

8. 发明专利

JP2014081473A Image forming apparatus 审中-公开
标题翻译：图像形成装置
公开(公告)号：JP2014081473A
公开(公告)日：2014-05-08
申请号：JP2012228850
申请日：2012-10-16
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： YUASA SHUTARO , NAGAFUJI HIDEO , OGAWA SADAFUMI , UCHITANI TAKESHI , KAWADA TEPPEI , YOSHIURA ARINOBU , HASE TAKAMASA , SHIMOKAWA TOSHIHIKO , YAMAJI KENSUKE
IPC分类号： G03G15/20
摘要： PROBLEM TO BE SOLVED: To provide an image forming apparatus configured to properly maintain separability of a recording medium from a fixing member, without reducing productivity of the recording medium with an image formed thereon even the recording medium having small thermal capacity.SOLUTION: A control part is provided for changing an image forming condition, which has an influence on separability of a tip end part in a conveyance direction of a recording sheet P separating from a surface of a heating roller 20, on the basis of thickness-related information related to a thickness of the recording sheet P. On the basis of a value of mass (basis weight) per unit area of the recording sheet P, at least one of the amount of toner adhered to an image part at the tip in the conveyance direction of the recording sheet P and fixing temperature in a fixing apparatus 19 is controlled.
摘要翻译：要解决的问题：提供一种图像形成装置，其被配置为适当地保持记录介质与定影部件的分离性，而不降低其上形成的图像的记录介质的生产率，即使是具有小热容量的记录介质。解决方案：控制提供了一种改变影像形成条件，其对基于与加热辊20的表面分离的记录片材P的输送方向上的前端部分的分离性的影响，基于与记录片材P的厚度。基于记录片材P的每单位面积的质量（单位面积重量）的值，附着在输送方向上的尖端处的图像部分的调色剂中的至少一个记录纸P和定影装置19中的定影温度被控制。

9. 发明专利

JP2008203905A Fixing device and image forming apparatus 审中-公开
标题翻译：固定装置和图像形成装置
公开(公告)号：JP2008203905A
公开(公告)日：2008-09-04
申请号：JP2008144834
申请日：2008-06-02
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： NAGAFUJI HIDEO
IPC分类号： G03G15/20
CPC分类号： G03G15/2053
摘要： PROBLEM TO BE SOLVED: To provide a fixing device configured to prevent increase of processing cost and falling of a reinforcing part, quicken the temperature rise to fixing temperature and suppress faulty fixing.
SOLUTION: This fixing device 1 is equipped with a fixing roller 12 incorporating a heat source 12A and a pressure roller 13 opposed to the roller 12 and interlocked therewith. In the fixing device 1, an unfixed image carried on recording paper is thermally fixed while the recording paper is held and fed between both rollers. The fixing roller 12 is provided with a plurality of ribs 15 and 15' projecting from its inner peripheral wall toward the center of its cross section of the fixing roller 12 inside, and the installed number of ribs 15 and 15' is made different between a center part and spots other than it in the shaft direction in the paper passing area.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种定影装置，其配置为防止加工成本的增加和加强部件的下降，将温度升高到定影温度，并抑制错误的固定。解决方案：该固定装置1装有一个定影辊12，该定影辊12包括热源12A和与辊12相对并与之互锁的加压辊13。在定影装置1中，将记录纸上携带的未定影图像热固定，同时记录纸被保持并在两个辊之间进给。定影辊12设置有从其内周壁朝向定影辊12的横截面的中心突出的多个肋15和15'，并且肋15和15'的安装数量在在纸张通过区域中的中心部分和除了它在轴方向上的点之外的其他部分。版权所有（C）2008，JPO＆INPIT

10. 发明专利

JP2006293287A Fixing device and image forming apparatus 审中-公开
标题翻译：固定装置和图像形成装置
公开(公告)号：JP2006293287A
公开(公告)日：2006-10-26
申请号：JP2005287815
申请日：2005-09-30
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： OKAMOTO JUN , YAMAGUCHI YOSHINORI , NAGAFUJI HIDEO , KIKUCHI TOSHIYUKI , SEKI TAKAYUKI , OKAMOTO MASAMI , TAKAGI HIROTADA
IPC分类号： G03G15/20
摘要： PROBLEM TO BE SOLVED: To provide a fixing device which is constituted so that the warming-up time is shortened by suppressing a temperature drop, the damage of a fixing roller is prevented and further, the space is saved. SOLUTION: The fixing device which heats/fixes a toner image on a recording medium S while the recording medium S is passed through between a heating member 30 and a pressure member 32 and transported is provided with an external heat generating member 101 arranged along the surface of the heating member 30. The heating member 30 has projecting shape and the external heat generating member 101 performs heating in recessed shape along the surface of the heat generating member 101 and is in non-contact with the heating member 30. When fixing for a first paper is performed in the case that a power is supplied, recovery from a stand-by state is obtained or the like, an on-state is maintained even if the heating member 30 is in an off-state. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种通过抑制温度下降而使预热时间缩短的定影装置，防止了定影辊的损坏，并且进一步节省了空间。解决方案：当记录介质S在加热构件30和压力构件32之间通过并被运送时，将记录介质S上的调色剂图像加热/固定的定影装置设置有外部发热构件101，其布置沿着加热构件30的表面。加热构件30具有突出形状，并且外部发热构件101沿着发热构件101的表面进行凹形加热，并且与加热构件30不接触。当在供电的情况下，在获得等待状态的恢复等的情况下进行第一纸张的固定，即使加热部件30处于断开状态也能够保持接通状态。版权所有（C）2007，JPO＆INPIT

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