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    • 21. 发明专利
    • Fixing device and image forming device
    • 固定装置和图像形成装置
    • JP2013044763A
    • 2013-03-04
    • JP2011180197
    • 2011-08-22
    • Ricoh Co Ltd株式会社リコー
    • GOTO SOIWATANI NAOKIIKEFUCHI YUTAKAYOSHIURA ARINOBUTAKAGI HIROTADAFUJIMOTO IPPEIYOSHINAGA HIROSHIISHII KENJIIMADA TAKAHIROSESHIMO TAKUYAYAMAGUCHI YOSHINORIARAI YUJIYOSHIKAWA MASAAKISHIMOKAWA TOSHIHIKO
    • G03G15/20
    • PROBLEM TO BE SOLVED: To keep a gap between a planar heating body and an inner peripheral portion of a heated member arranged with the planar heating body, small and constant.SOLUTION: A fixing device includes: a fixing sleeve 21 which is a rotating endless belt; a pressurizing roller 31 disposed so as to press the fixing sleeve 21 on an outer peripheral side of the fixing sleeve 21; an abutting member 26 disposed on an inner peripheral side of the fixing sleeve 21, and abutting on the pressurizing roller 31 through the fixing sleeve 21 by the pressing of the pressurizing roller 31 to form a nip portion; and a planar heating body 22 disposed on the inner peripheral side of the fixing sleeve 21, and having a resistance heating layer 22b for heating the fixing sleeve 21. In the planar heating body 22, the resistance heating layer 22b has a laminated structure sandwiched by insulation layers 22f and 22g. The insulation layer 22f opposing to the inner peripheral side of the fixing member of the insulation layers 22f and 22g, has a higher thermal expansion coefficient than that of the insulation layer 22g formed on the opposite side to the insulation layer 22f through the resistance heating layer 22b.
    • 要解决的问题:为了保持平面加热体与布置在平面加热体上的加热部件的内周部分之间的间隙小且恒定。 解决方案:固定装置包括:作为旋转环形带的定影套筒21; 设置成在定影套筒21的外周侧按压定影套筒21的加压辊31; 设置在定影套筒21的内周侧的抵接构件26,通过加压辊31的按压而通过定影套筒21抵接在加压辊31上,形成压合部; 以及设置在定影套筒21的内周侧的平面加热体22,具有用于加热定影套筒21的电阻加热层22b。在平面加热体22中,电阻加热层22b具有被 绝缘层22f和22g。 与绝缘层22f和22g的固定构件的内周侧相对的绝缘层22f具有比通过电阻加热层在与绝缘层22f相反的一侧形成的绝缘层22g的热膨胀系数更高的热膨胀系数 22b。 版权所有(C)2013,JPO&INPIT
    • 22. 发明专利
    • Fixing device and image forming apparatus
    • 固定装置和图像形成装置
    • JP2012208456A
    • 2012-10-25
    • JP2011122251
    • 2011-05-31
    • Ricoh Co Ltd株式会社リコー
    • YOSHINAGA HIROSHIYOSHIKAWA MASAAKIISHII KENJIARAI YUJITAKAGI HIROTADAIWATANI NAOKITOKUDA TETSUOFUJIMOTO IPPEIYAMAGUCHI YOSHINORIIKEFUCHI YUTAKASESHIMO TAKUYAYOSHIURA ARINOBUIMADA TAKAHIROGOTO SOSHIMOKAWA TOSHIHIKO
    • G03G15/20
    • G03G15/2039G03G15/2053G03G2215/2035
    • PROBLEM TO BE SOLVED: To provide a fixing device having such a configuration that the warm-up start temperature of an endless belt can be always maintained to a predetermined temperature, even when the temperature of a resistance heating element has a variation, in a nod to the problem of a fixing device adopting such a configuration that the endless belt is wound on a roller used as a heat conductor or a heat generation source.SOLUTION: The fixing device includes a flexible endless fixing member 121 traveling in a predetermined direction, to heat and melt a toner image, a contact member 122 individually provided on the inner circumferential surface side of the fixing member 121 and coming into contact with a pressure member 131 through the fixing member 121, to form a nip part, a support member 125 supporting a pressing force by the pressure member 131 on the non-contact surface side of the contact member 122, to prevent the deformation of the contact member 122, and a heating element 123 in a position except the nip part on the inner circumferential surface side of the fixing member 121. The fixing member 121 has contact with a gap of a predetermined distance or less or a predetermined pressure or more between the fixing member 121 and the heating element 123, when the fixing member 121 is rotated and is maintained with a gap of a predetermined distance or more between the fixing member 121 and the heating element 123, when the fixing member 121 is not rotated.
    • 要解决的问题:为了提供具有这样的结构的定影装置,即即使在电阻加热元件的温度具有变化的情况下,环形带的预热开始温度也可以始终保持在预定温度, 指出采用这样的结构的定影装置的问题,即环形带缠绕在用作导热体或发热源的辊上。 解决方案:定影装置包括沿预定方向行进的柔性环形固定构件121,以加热和熔化调色剂图像;接触构件122,其独立地设置在固定构件121的内周面侧并接触; 通过固定构件121的压力构件131形成夹持部,支撑构件125,其支撑由接触构件122的非接触表面侧上的压力构件131施加的压力,以防止接触部的变形 构件122和除了固定构件121的内周面侧上的夹持部之外的位置的加热元件123.固定构件121与第二固定构件121的内周面侧之间的预定距离或预定压力以上的间隙接触 固定构件121和加热元件123,当固定构件121旋转并且在固定构件121和加热体之间保持预定距离或更大的间隙时 当固定构件121不旋转时。 版权所有(C)2013,JPO&INPIT
    • 23. 发明专利
    • Fixing device and image forming device
    • 固定装置和图像形成装置
    • JP2012141328A
    • 2012-07-26
    • JP2010282692
    • 2010-12-20
    • Ricoh Co Ltd株式会社リコー
    • YOSHIKAWA MASAAKITOKUDA TETSUOIKEFUCHI YUTAKASESHIMO TAKUYAYOSHINAGA HIROSHIGOTO SOYAMAGUCHI YOSHINORISHIMOKAWA TOSHIHIKOISHII KENJIIMADA TAKAHIROIWATANI NAOKIARAI YUJIYOSHIURA ARINOBUTAKAGI HIROTADAFUJIMOTO IPPEI
    • G03G15/20F16C13/00
    • G03G15/2053G03G2215/2035
    • PROBLEM TO BE SOLVED: To provide a fixing device and an image forming device improving the separating property of a recording medium.SOLUTION: A fixing device includes a fixing belt; a pressurizing roller; a nip forming member disposed on an inner peripheral side of the fixing belt; a reinforcing member for supporting the nip forming member from the opposite side to the nip portion; heating means for heating a predetermined area on a nip portion upstream side in the fixing belt; and a flange member 28 composed of a cylinder portion 28a inserted in an inner peripheral portion of an axial end portion of the fixing belt and having an outer peripheral surface rotatably holding a part near the end portion of the fixing belt, and a flange portion 28b. As a cross-sectional shape of the outer peripheral surface of the cylinder portion 28a in the flange member 28, a heating corresponding area 63' corresponding to an area in which the fixing belt is heated by the heating means, has an arc shape of a predetermined radius corresponding to the radius of the fixing belt, and a center 63a' of the arc is positioned on the upstream side in a recording medium carrying direction in regard to a center line 26c in the recording medium carrying direction of the nip forming member.
    • 要解决的问题:提供一种改善记录介质的分离性能的定影装置和图像形成装置。 解决方案:定影装置包括定影带; 加压辊; 设置在所述定影带的内周侧的辊隙形成部件; 加强构件,用于从夹持部的相对侧支撑夹持形成构件; 加热装置,用于加热定影带中的夹持部上游侧的预定区域; 以及凸缘部件28,其由插入定影带的轴向端部的内周部的圆筒部28a构成,具有可旋转地保持定影带的端部附近的部分的外周面,凸缘部28b 。 作为凸缘部件28中的圆筒部28a的外周面的截面形状,与加热装置对定影带进行加热的区域对应的加热对应区域63'具有圆弧状 对应于定影带的半径的预定半径,并且弧的中心63a'位于相对于夹持形成构件的记录介质输送方向上的中心线26c的记录介质传送方向的上游侧。 版权所有(C)2012,JPO&INPIT
    • 25. 发明专利
    • Fixing device and image forming device
    • 固定装置和图像形成装置
    • JP2012128331A
    • 2012-07-05
    • JP2010281661
    • 2010-12-17
    • Ricoh Co Ltd株式会社リコー
    • ARAI YUJIYOSHIKAWA MASAAKIISHII KENJIYOSHINAGA HIROSHITAKAGI HIROTADAYAMAGUCHI YOSHINORIIWATANI NAOKITOKUDA TETSUOIKEFUCHI YUTAKASESHIMO TAKUYAFUJIMOTO IPPEIIMADA TAKAHIROGOTO SOSHIMOKAWA TOSHIHIKOYOSHIURA ARINOBU
    • G03G15/20
    • PROBLEM TO BE SOLVED: To provide a fixing device capable of obtaining stable nip characteristics in a nip section, and further to provide an image forming device.SOLUTION: A fixing device comprises: a fixing belt 21; a pressure roller 31; a nip forming member 26 being brought into pressure contact with a pressure roller 31 through the fixing belt 21 so as to form a nip section; a reinforcement member 23 fixed to an inner diameter section of the fixing belt 21 for supporting the nip forming member 26 from a side opposite to the nip section; a supporting member 60 supporting rotation of the fixing belt 21 from an inner peripheral side of the fixing belt 21 and having a substantially cylindrical shape; heating means 25 for heating the supporting member 60; a flange member 28 holding an axial direction end of the supporting member 60 and being fixed to a side plate 42 of the fixing device; and a reinforcing member supporting section 42a being different from the flange member 28, comprising a member with high temperature strength higher than that of the flange member 28 and supporting an axial direction end of the reinforcement member 23 with reference to the side plate 42 of the fixing device.
    • 要解决的问题:提供一种能够在夹持部中获得稳定的压区特性的定影装置,并且还提供一种图像形成装置。 解决方案:定影装置包括:定影带21; 加压辊31; 夹持部形成部件26通过定影带21与加压辊31进行压力接触,形成辊隙部; 固定在定影带21的内径部分上的加强构件23,用于从夹持部分相对的一侧支撑夹持形成构件26; 支撑构件60,其从定影带21的内周侧支撑定影带21的旋转,并具有大致圆筒形状; 用于加热支撑构件60的加热装置25; 保持支撑构件60的轴向端部并固定到定影装置的侧板42的凸缘构件28; 以及与凸缘构件28不同的加强构件支撑部42a,其包括高于凸缘构件28的高温强度的构件,并且相对于所述凸缘构件28的侧板42支撑加强构件23的轴向端。 固定装置。 版权所有(C)2012,JPO&INPIT
    • 26. 发明专利
    • Fixing device and image forming device
    • 固定装置和图像形成装置
    • JP2012128220A
    • 2012-07-05
    • JP2010280118
    • 2010-12-16
    • Ricoh Co Ltd株式会社リコー
    • YAMAGUCHI YOSHINORIYOSHIKAWA MASAAKIISHII KENJIYOSHINAGA HIROSHIARAI YUJITAKAGI HIROTADAIWATANI NAOKITOKUDA TETSUOFUJIMOTO IPPEIIKEFUCHI YUTAKASESHIMO TAKUYAYOSHIURA ARINOBUIMADA TAKAHIROGOTO SOSHIMOKAWA TOSHIHIKO
    • G03G15/20
    • PROBLEM TO BE SOLVED: To provide a fixing device capable of obtaining uniform nip pressure while maintaining a low heat capacity of the fixing device without reducing heating efficiency of a supporting member, and further to provide an image forming device.SOLUTION: A fixing device comprises: a fixing belt 21; a pressure roller 31; a nip forming member 26 being disposed on an inner peripheral side of the fixing belt 21 and being brought into pressure contact with the pressure roller 31 through the fixing belt 21 so as to form a nip section; a reinforcement member 23 fixed to an inner diameter section of the fixing belt 21 for supporting the nip forming member 26 from a side opposite to the nip section; a supporting member 60 being fixed to the inner peripheral side of the fixing belt 21 and supporting rotation of the fixing belt 21 with an outer peripheral surface thereof; and heating means 25 being disposed inside of a cylinder of the supporting member 60 and heating the supporting member 60. The reinforcement member 23 comprises: a supporting projection 23b being brought into contact with the nip forming member 26 and supporting the nip forming member 26; and a main body 23a being disposed extending from the supporting projection 23b in a pressure direction of the pressure roller 31 and having thickness larger than that of the supporting projection 23b at a side opposite to the side on which the heating means 25 is disposed.
    • 解决问题:提供一种能够在不降低支撑构件的加热效率的同时保持定影装置的低热容量的同时获得均匀的压区压力的定影装置,并且还提供图像形成装置。 解决方案:定影装置包括:定影带21; 加压辊31; 夹持形成构件26设置在定影带21的内周侧,并通过定影带21与加压辊31压力接触,以形成夹持部; 固定在定影带21的内径部分上的加强构件23,用于从夹持部分相对的一侧支撑夹持形成构件26; 固定在定影带21的内周侧并支撑定影带21的旋转的支撑构件60的外周面; 并且加热装置25设置在支撑构件60的圆筒内部并加热支撑构件60.加强构件23包括:支撑突起23b与夹持形成构件26接触并支撑夹持形成构件26; 以及主体23a,其从压力辊31的压力方向从支撑突起23b延伸,并且在与设置有加热装置25的一侧相反的一侧具有比支撑突起23b的厚度更大的厚度。 版权所有(C)2012,JPO&INPIT
    • 27. 发明专利
    • Fixing device and image forming apparatus
    • 固定装置和图像形成装置
    • JP2012108189A
    • 2012-06-07
    • JP2010254842
    • 2010-11-15
    • Ricoh Co Ltd株式会社リコー
    • IWATANI NAOKIYOSHIKAWA MASAAKIISHII KENJIYOSHINAGA HIROSHIARAI YUJITAKAGI HIROTADATOKUDA TETSUOYAMAGUCHI YOSHINORIIKEFUCHI YUTAKASESHIMO TAKUYAFUJIMOTO IPPEIIMADA TAKAHIROGOTO SOYOSHIURA ARINOBUSHIMOKAWA TOSHIHIKO
    • G03G15/20
    • PROBLEM TO BE SOLVED: To reduce components costs and cost of a fixing device.SOLUTION: A fixing device 20 has: a fixing belt 21 which is an endless belt having flexibility; a pressure roller 31 disposed at the outer peripheral side of the fixing belt 21 so that it can press the fixing belt 21; a nip forming member 23 that is disposed at the inner peripheral side of the fixing belt 21 and forms a nip part by coming into contact with the pressure roller 31 through the fixing belt 21 when pressed by the pressure roller 31; a pipe-like metal thermal conductor 22 fixed close to the inner peripheral side of the fixing belt 21; and a reinforcement member (stay, supporting member) 25 that is fixed at the inner peripheral side of the fixing belt 21 and reinforces strength of the contacting member. The reinforcement member 25 comprises: a positioning member 26 as means for positioning the reinforcement member 25 to the nip forming member 23; and a load bearing member 27 as load bearing means for bearing a load from the side of the pressure roller 31.
    • 要解决的问题:降低固定装置的部件成本和成本。 解决方案:定影装置20具有:具有柔性的环形带的定影带21; 设置在定影带21的外周侧的加压辊31,以便能够按压定影带21; 夹持形成构件23,其设置在定影带21的内周侧,并且在被加压辊31按压时通过定影带21与加压辊31接触而形成咬合部; 靠近定影带21的内周侧的管状金属导热体22; 以及固定在定影带21的内周侧的加强构件(支撑构件)25,并且增强了接触构件的强度。 加强构件25包括:定位构件26,其作为用于将加强构件25定位到辊隙形成构件23的装置; 以及承载构件27作为承载装置,用于承载来自加压辊31侧的负载。版权所有(C)2012,JPO&INPIT
    • 28. 发明专利
    • Fixing device and image forming apparatus
    • 固定装置和图像形成装置
    • JP2012103609A
    • 2012-05-31
    • JP2010253984
    • 2010-11-12
    • Ricoh Co Ltd株式会社リコー
    • TOKUDA TETSUOYOSHIKAWA MASAAKIISHII KENJIYOSHINAGA HIROSHIARAI YUJITAKAGI HIROTADAIWATANI NAOKIIKEFUCHI YUTAKASESHIMO TAKUYAFUJIMOTO IPPEIYAMAGUCHI YOSHINORIYOSHIURA ARINOBUIMADA TAKAHIROGOTO SOSHIMOKAWA TOSHIHIKO
    • G03G15/20
    • G03G15/2039G03G2215/2035
    • PROBLEM TO BE SOLVED: To provide a fixing device that prevents recording media from being rolled into a fixing member and a pressuring member without decreasing the quality of a fixed image, and an image forming apparatus.SOLUTION: A fixing device 20 comprises: a flexible, endless fixing belt; a pressuring roller 31 that is disposed to face opposite to the fixing belt; and a nip forming member 26 that is disposed at the inner peripheral side of the fixing belt, and comes into pressure contact with the pressuring roller 31 via the fixing belt so as to form a fixing nip part 28, where the fixing belt and the pressuring roller 31 fix unfixed images to recording media. The nip forming member 26 comprises: an arc-shaped part 26b that extends along the outer peripheral surface of the pressuring roller 31 on the downstream side at the fixing nip part 28 in the recording medium conveyance direction; and a protrusion 26a that protrudes toward the pressuring roller 31 without a contact therewith on the downstream side than the fixing nip part 28 in the recording medium conveyance direction.
    • 解决的问题:提供一种防止记录介质卷入固定构件和加压构件而不降低固定图像的质量的定影装置和图像形成装置。 解决方案:定影装置20包括:柔性的环形定影带; 设置成与定影带相对的加压辊31; 以及设置在定影带的内周侧的辊隙形成构件26,并且经由定影带与加压辊31压力接触,以形成定影夹持部28,其中定影带和加压 辊31将未固定的图像固定到记录介质。 辊隙形成构件26包括:在记录介质输送方向上在定影夹持部28的下游侧沿加压辊31的外周面延伸的弧形部26b; 以及在记录介质输送方向上与定影夹持部28相比在下游侧与加压辊31突出的突起26a。 版权所有(C)2012,JPO&INPIT
    • 29. 发明专利
    • Fixing device and image forming apparatus
    • 固定装置和图像形成装置
    • JP2012098362A
    • 2012-05-24
    • JP2010243927
    • 2010-10-29
    • Ricoh Co Ltd株式会社リコー
    • FUJIMOTO IPPEIARAI YUJITAKAGI HIROTADAYAMAGUCHI YOSHINORIYOSHIURA ARINOBUSHIMOKAWA TOSHIHIKOTOKUDA TETSUOIKEFUCHI YUTAKAISHII KENJIIWATANI NAOKIIMADA TAKAHIROYOSHINAGA HIROSHISESHIMO TAKUYAGOTO SOYOSHIKAWA MASAAKI
    • G03G15/20
    • PROBLEM TO BE SOLVED: To shorten a warm-up time by reducing the loss of the quantity of heat in warming up.SOLUTION: A fixing device includes a fixing belt 21, a pressure roller 31 arranged so as to press the fixing belt 21, a nip forming member 23 arranged on the inner circumferential side of the fixing belt 21 and coming into contact with the pressure roller 31 through the fixing belt 21, to form a nip portion, a pipe-like metallic thermal conductor 22 fixed close to the inner circumferential side of the fixing belt 21, and heating means arranged on the inner circumferential side of the metallic thermal conductor 22 and heating the metallic thermal conductor 22. The fixing device further includes a reinforcement member 24 fixed on the inner circumferential side of the fixing belt 21 and reinforcing the strength of the nip forming member 23 and the heating means comprises a first halogen heater 25 generating heat in the whole area of the first halogen heater 25 in its longitudinal direction and a second halogen heater 26 arranged across the reinforcement member 24 with respect to the first halogen heater 25 and mainly generating heat in a part of the second halogen heater 26 in its longitudinal direction. One of the first halogen heater 25 and the second halogen heater 26 is lighted to perform a warming-up operation.
    • 要解决的问题:通过减少预热中的热量损失来缩短预热时间。 解决方案:定影装置包括定影带21,设置成按压定影带21的加压辊31,设置在定影带21的内周侧上并与定影带21接触的夹持形成部件23。 加压辊31通过定影带21,以形成夹持部,靠近定影带21的内周侧固定的管状金属导热体22,以及配置在金属导热体的内周侧的加热装置 并且加热金属热导体22.定影装置还包括固定在定影带21的内圆周侧上的加强件24,并加强了辊隙形成件23的强度,并且加热装置包括产生 第一卤素加热器25在其纵向方向的整个区域中的热量以及相​​对于第一卤素加热器25布置在加强构件24上的第二卤素加热器26 第一卤素加热器25,并且主要在第二卤素加热器26的一部分沿其纵向方向产生热量。 第一卤素加热器25和第二卤素加热器26中的一个被点亮以进行预热操作。 版权所有(C)2012,JPO&INPIT
    • 30. 发明专利
    • Image forming apparatus
    • 图像形成装置
    • JP2011197117A
    • 2011-10-06
    • JP2010061266
    • 2010-03-17
    • Ricoh Co Ltd株式会社リコー
    • HONJO KENJIITO CHIKASHITAWADA TAKAAKIARAI YUJITOMITA DAISUKE
    • G03G21/00G03G21/10
    • PROBLEM TO BE SOLVED: To utilize the capacity of a storage container at a maximum without causing a user to confuse a timing of replacement because of an increase in the calculated number of remaining days up to fullness of the storage container.SOLUTION: A control unit 40 calculates the number of remaining usable days up to fullness of a waste toner bottle 20 based on: the number of days up to the present calculated from a date stored in a detection date memory 46; a preset fullness threshold Mth from when a waste toner amount detector 30 detects that an amount of waste toner recovered in the waste toner bottle 20 reaches a predetermined filling amount, until when it is determined that the storage amount in the waste toner bottle 20 reaches the fullness; and an accumulated amount of waste toner Mn stored in a waste toner amount accumulating memory 45. The control unit does not update the number of remaining days when the calculated number of remaining usable days becomes a value larger than the last calculated number of remaining days.
    • 要解决的问题:为了最大限度地利用存储容器的容量,而不会导致用户因为计算出的存储容器充满度的剩余天数的增加而混淆更换的时间。解决方案:控制单元 40计算出根据从检测日期存储器46中存储的日期计算的迄今为止的天数到废墨粉瓶20的充满度的剩余可用天数; 从废粉调色剂量检测器30检测到在废调色剂瓶20中回收的废调色剂的量达到预定填充量的预设丰度阈值Mth,直到确定废调色剂瓶20中的储存量达到 丰满; 以及存储在废调色剂量累积存储器45中的累积量的废调色剂Mn。当计算出的剩余使用天数为比最后计算的剩余天数大的值时,控制单元不更新剩余天数。