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1. 发明专利

JP2014178634A Image forming apparatus 审中-公开
标题翻译：图像形成装置
公开(公告)号：JP2014178634A
公开(公告)日：2014-09-25
申请号：JP2013054109
申请日：2013-03-15
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： YUASA SHUTARO , OGAWA SADAFUMI , YAMAJI KENSUKE
IPC分类号： G03G15/20 , G03G15/00 , G03G21/00
摘要： PROBLEM TO BE SOLVED: To suppress a toner once melted on a recording medium due to excessive heat quantity from being re-melted at a position in a fixing device where filaments are overlapped with each other.SOLUTION: Since a temperature detection element cannot be provided at a position f' where filaments f of a central heater 12 and end heaters 13 are overlapped with each other, and a fixing device has a small thermal capacity, the fixing device is susceptible to turn-on of the heaters. In order to prevent abnormal images as an influence of excessive temperature rise, when a temperature of the temperature detection element is higher to some extent than a default preset temperature of the temperature detection element used for temperature control of the central heater 12 and the end heaters 13, the present temperature itself is decreased. When a temperature of the temperature detection element is higher than the preset temperature in feeding A3-size paper during which the central heater 12 and the end heaters 13 are used, the present temperature is decreased so as to suppress excessive temperature rise at the position f' where the filaments f are overlapped with each other.
摘要翻译：要解决的问题：为了抑制由于在长丝彼此重叠的定影装置中的位置处由于过度热量再次熔化而在记录介质上熔化的调色剂。解决方案：由于不能提供温度检测元件在中央加热器12和端部加热器13的丝线f彼此重叠的位置f'处，并且定影装置具有小的热容量，所以定影装置易受加热器的接通。为了防止异常图像作为过度升温的影响，当温度检测元件的温度比用于中央加热器12和末端加热器的温度控制的温度检测元件的默认预设温度高一定程度时如图13所示，当前温度本身下降。当使用中央加热器12和端部加热器13的A3尺寸纸的温度检测元件的温度高于预设温度时，降低当前温度，以便抑制位置f处的过度温度升高 '灯丝f彼此重叠。

2. 发明专利

JP2014174440A Fixing device and image forming apparatus 有权
标题翻译：固定装置和图像形成装置
公开(公告)号：JP2014174440A
公开(公告)日：2014-09-22
申请号：JP2013048951
申请日：2013-03-12
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ARAI YUJI , SEKI TAKAYUKI , MINBU RYUICHI , YAMAGUCHI YOSHINORI , TAMAKI TOSHITARO , SHIMOKAWA TOSHIHIKO , IKEBUCHI YUTAKA , YOSHINAGA HIROSHI , SAITO KAZUYA , YUASA SHUTARO
IPC分类号： G03G15/20
摘要： PROBLEM TO BE SOLVED: To provide a fixing device with a simple configuration capable of achieving energy saving and a reduction in first print time, and suppressing an increase in temperature at end parts without reducing productivity.SOLUTION: A fixing device includes a fixing rotating body, a heat source that heats the fixing rotating body, a non-rotatable nip forming member that is brought into contact with the fixing rotating body inside the fixing rotating body, a pressure rotating body that forms a nip with the nip forming member with the fixing rotating body therebetween, and a support member that receives a pressure applied to the nip forming member. The fixing device further includes a shield member that can be moved between an inner surface of the fixing rotating body and the heat source, and the shield member is constantly in contact with the support member.
摘要翻译：要解决的问题：提供具有能够实现节能并且缩短第一打印时间的简单配置的定影装置，并且在不降低生产率的情况下抑制端部温度的升高。解决方案：一种定影装置，包括固定旋转体，加热固定旋转体的热源，与固定旋转体内的固定旋转体接触的不可旋转的夹持形成部件，与固定旋转体的固定旋转体形成辊隙的压力旋转体旋转体，以及承受施加到辊隙形成构件的压力的支撑构件。定影装置还包括能够在固定旋转体的内表面和热源之间移动的屏蔽构件，并且屏蔽构件不断地与支撑构件接触。

3. 发明专利

JP2014174358A Fixing device and image forming apparatus including the same 审中-公开
标题翻译：固定装置和图像形成装置，包括它们
公开(公告)号：JP2014174358A
公开(公告)日：2014-09-22
申请号：JP2013047448
申请日：2013-03-11
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： ISHII KENJI , YOSHINAGA HIROSHI , UCHITANI TAKESHI , OGAWA SADAFUMI , IWATANI NAOKI , SESHIMO TAKUYA , IMADA TAKAHIRO , GOTO SO , HASE TAKAMASA , SHIMOKAWA TOSHIHIKO , YUASA SHUTARO , KAWADA TEPPEI , YAMAJI KENSUKE , SUZUKI AKIRA , TAKAGI HIROTADA , YOSHIURA ARINOBU
IPC分类号： G03G15/20
摘要： PROBLEM TO BE SOLVED: To improve slidability of a fixing belt to extend the life of a fixing device.SOLUTION: A rotatable fixing belt 104 (fixing member) heated by a halogen heater 116 (heat source) and held by a flange 114 (holding member) at both right and left ends is applied with pressure by a pressure roller 102 (pressure member). Inside the fixing belt 104, the pressure roller 102 forms a nip part 122 with a nip forming member 106, and between the nip forming member 106 and the fixing belt 104, a cloth-like slide sheet 108b (slide member) is installed, which contains lubricant 112 and is molded so that a fiber recessed groove direction 130b (groove direction) becomes identical to a slide direction of the fixing belt 104. A lubricant circulation member 110a holds the lubricant 112 to be applied to the slide sheet 108b on the upstream side of the nip part 122, and applies the lubricant 112 to the fixing belt 104 to supply the lubricant 112 to the downstream side of the nip part 122.
摘要翻译：要解决的问题：提高定影带的滑动性以延长定影装置的使用寿命。解决方案：由卤素加热器116（热源）加热并由凸缘114保持的可旋转定影带104（固定构件）（保持构件）通过加压辊102（压力构件）施加压力。在定影带104的内部，加压辊102与辊隙形成部件106形成夹持部122，并且在辊隙形成部件106和定影带104之间，安装有布状的滑动片108b（滑动部件）包含润滑剂112并且被模制成使得纤维凹槽方向130b（槽方向）变得与定影带104的滑动方向相同。润滑剂循环构件110a将润滑剂112保持在上游的滑动片108b上并将润滑剂112施加到定影带104，以将润滑剂112供给到夹持部122的下游侧。

4. 发明专利

JP2014098737A Image forming apparatus 审中-公开
标题翻译：图像形成装置
公开(公告)号：JP2014098737A
公开(公告)日：2014-05-29
申请号：JP2012249077
申请日：2012-11-13
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： SESHIMO TAKUYA , SATO MASAHIKO , YOSHIKAWA MASAAKI , YOSHINAGA HIROSHI , IWATANI NAOKI , TAKAGI HIROTADA , IMADA TAKAHIRO , GOTO SO , SUZUKI AKIRA , ISHII KENJI , OGAWA SADAFUMI , KAWADA TEPPEI , YOSHIURA ARINOBU , SHIMOKAWA TOSHIHIKO , YAMAJI KENSUKE , UCHITANI TAKESHI , HASE TAKAMASA , YUASA SHUTARO
IPC分类号： G03G15/20
CPC分类号： G03G15/205 , G03G2215/2035
摘要： PROBLEM TO BE SOLVED: To suppress power consumption required to maintain a fixing temperature, which is unnecessary, until other operating units are started up.SOLUTION: An image forming apparatus acquires, in returning from a stand-by mode or a sleep mode, image data as warm-up time estimation information for estimating a warm-up time required to increase a temperature of a fixing belt 121 to a target fixing temperature, and when the acquired image data is monochrome image data, performs control to delay a timing to start heating the fixing belt.
摘要翻译：要解决的问题：为了抑制维持不需要的定影温度所需的功率消耗，直到其他操作单元启动为止。解决方案：图像形成装置在从待机模式或睡眠模式返回时获取图像数据作为用于估计将定影带121的温度升高到目标定影温度所需的预热时间的预热时间估计信息，并且当获取的图像数据是单色图像数据时，执行控制以延迟开始的定时加热定影带。

5. 发明专利

JP2013195862A 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：JP2013195862A
公开(公告)日：2013-09-30
申请号：JP2012064642
申请日：2012-03-22
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： YUASA SHUTARO , ISHII KENJI , OGAWA SADAFUMI , KAWADA TEPPEI , YOSHIURA ARINOBU , SHIMOKAWA TOSHIHIKO , YAMAJI KENSUKE , UCHITANI TAKESHI , HASE TAKAMASA , YOSHIKAWA MASAAKI , TAKAGI HIROTADA , IWATANI NAOKI , IMADA TAKAHIRO , GOTO SO , SUZUKI AKIRA , SESHIMO TAKUYA
IPC分类号： G03G15/20
摘要： PROBLEM TO BE SOLVED: To provide a fixing device and an image forming apparatus, which effectively prevent a failure due to a local increase in a surface temperature of a fixing roller after transporting a sheet, causing an abnormal image such as hot-offset to a fixed image on a recording medium in the following series of transport actions.SOLUTION: If a detected temperature detected by temperature detection means exceeds a predetermined threshold when a series of sheet transport actions are finished, an idle rotation mode of rotating a fixing roller and a pressure roller is executed in the state of stopping heating the fixing roller with heating means (a step S7). Further, the executing time of the idle rotation mode is varied (steps S14, 16, 17, 19, 21, and 22) on the basis of information of a recording medium related to the series of transporting actions (a step S2) and information of the recording medium related to a following series of transporting actions (a step S10).
摘要翻译：要解决的问题：提供一种定影装置和图像形成装置，其有效地防止由于传送片材之后定影辊的表面温度的局部增加而导致的故障，导致诸如热偏移的异常图像到固定图像在记录介质上的一系列传送动作。解决方案：如果在一系列纸张传送动作结束时由温度检测装置检测到的检测到的温度超过预定阈值，则转动定影辊和在加热装置停止加热定影辊的状态下执行加压辊（步骤S7）。此外，基于与一系列传送动作相关的记录介质的信息（步骤S2）和信息，改变空闲旋转模式的执行时间（步骤S14,16,17,19,21和22）与步骤S10相关的记录介质。

6. 发明专利

JP2013195858A Fixing device, and an image forming apparatus 有权
标题翻译：固定装置和图像形成装置
公开(公告)号：JP2013195858A
公开(公告)日：2013-09-30
申请号：JP2012064614
申请日：2012-03-22
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： IWATANI NAOKI , SATO MASAHIKO , YOSHIKAWA MASAAKI , YOSHINAGA HIROSHI , ISHII KENJI , OGAWA SADAFUMI , TAKAGI HIROTADA , UCHITANI TAKESHI , SESHIMO TAKUYA , IMADA TAKAHIRO , GOTO SO , SUZUKI AKIRA , KAWADA TEPPEI , SHIMOKAWA TOSHIHIKO , YOSHIURA ARINOBU , HASE TAKAMASA , YUASA SHUTARO , YAMAJI KENSUKE
IPC分类号： G03G15/20
CPC分类号： G03G15/2064 , G03G15/2053 , G03G2215/2035
摘要： PROBLEM TO BE SOLVED: To provide a fixing device and an image forming apparatus in which, when a pressure rotating body is moved to a fixing belt in the separation direction by a pressure reducing mechanism, engagement of a pressure rotating body gear with a counterpart gear engaging with that gear is likely to be maintained without enlarging a moving range of the pressure rotating body so much.SOLUTION: In a fixing device, a pressure rotating body 31 is provided which is rotated and driven by a driving force inputted from a driving source 71, and pressure reducing mechanisms 63, 68, 69 are also provided in which the pressure rotating body 31 is moved against a fixing belt 21 in the separating direction to reduce a pressure contact force of the pressure rotating body 31 to the fixing belt 21. Then, the pressure rotating body 31 is held by a first holding member 43 having a notch 43a whose one end side in the width direction extending to the fixing belt 21 in the direction in the pressure contact direction is formed, and also held by a second holding member 63 having a slot 63b whose other end side in the width direction extending in the direction of intersecting with the pressure contact direction is formed.
摘要翻译：要解决的问题：提供一种定影装置和图像形成装置，其中当压力旋转体通过减压机构沿分离方向移动到定影带时，压力旋转体齿轮与对应齿轮的接合在不增加压力旋转体的移动范围的情况下，可能维持与该齿轮的接合。解决方案：在定影装置中，设置有压力旋转体31，该压力旋转体31由从驱动源输入的驱动力旋转和驱动 71还设有减压机构63,68,69，其中压力旋转体31沿分离方向抵靠定影带21移动，以减小压力旋转体31对定影带21的压力接触力。然后，压力旋转体31被第一保持构件43保持，该第一保持构件43具有切口43a，该切口43a的宽度方向的一端侧沿着压榨方向延伸至定影带21 形成再接触方向，并且还由具有狭缝63b的第二保持构件63保持，第二保持构件63形成沿与压接方向交叉的方向延伸的宽度方向上的另一端侧。

7. 发明专利

JP2013186352A 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：JP2013186352A
公开(公告)日：2013-09-19
申请号：JP2012052373
申请日：2012-03-08
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： SUZUKI AKIRA , YOSHIKAWA MASAAKI , ISHII KENJI , OGAWA SADAFUMI , UCHITANI TAKESHI , TAKAGI HIROTADA , IWATANI NAOKI , SESHIMO TAKUYA , YOSHIURA ARINOBU , KAWADA TEPPEI , IMADA TAKAHIRO , GOTO SO , HASE TAKAMASA , SHIMOKAWA TOSHIHIKO , ARAI YUJI , YAMAGUCHI YOSHINORI , YUASA SHUTARO , YAMAJI KENSUKE
IPC分类号： G03G15/20
摘要： PROBLEM TO BE SOLVED: To provide a fixing device of simple configuration that restricts an endless belt skew by a method without using a belt skew restricting member.SOLUTION: A fixing device has a pressure member 31 that forms a pressing area 41 disposed in firm contact with a pressure rotor 21 from the inner circumferential side of an endless belt 11. In the pressing area 41, the endless belt 11 and pressure rotor 21 conveys a recording medium P while sandwiching it between them. A pressing member 31 is fixed to a support member 51, and an endless belt 11 slides over the pressing member 31. A fixing area 42 is made narrower than the pressing area 41 formed by the pressing member 31, and an area where the pressure rotor 21 does not sandwich the endless belt 11 is located at the end of the pressing area 41. The rotating speed at which the endless belt 11 is rotated following the pressure rotor 21 at the end of the pressure area 41 is made lower than that in almost all areas other than the pressing area 41. The endless belt 11 obtains from the pressure rotor 21 rotation drive force sufficient for slide friction resistance acting on the pressing member 31 side face of it during the rotation thereof.
摘要翻译：要解决的问题：提供一种简单结构的定影装置，其通过不使用带歪斜限制构件的方法限制环形带歪斜。解决方案：定影装置具有压力构件31，压力构件31形成紧密配合的按压区域41 具有来自环形带11的内周侧的压力转子21.在按压区域41中，环形带11和压力转子21将记录介质P夹在它们之间。按压部件31固定在支撑部件51上，环形带11在按压部件31上滑动。固定区域42比由按压部件31形成的按压区域41窄， 21不夹住环形带11位于按压区域41的端部。环形带11在压力区域41的端部处的压力转子21之后旋转的转速比几乎除了按压区域41之外的所有区域。环形带11在其旋转期间从压力转子21获得足够的作用于其按压构件31侧面上的滑动摩擦阻力的旋转驱动力。

8. 发明专利

JP2013164475A Fixing device and image forming device 有权
标题翻译：固定装置和图像形成装置
公开(公告)号：JP2013164475A
公开(公告)日：2013-08-22
申请号：JP2012026647
申请日：2012-02-09
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： YUASA SHUTARO , UCHITANI TAKESHI , HASE TAKAMASA , SESHIMO TAKUYA , YOSHINAGA HIROSHI , ISHII KENJI , OGAWA SADAFUMI , YOSHIURA ARINOBU , KAWADA TEPPEI , SHIMOKAWA TOSHIHIKO , YAMAJI KENSUKE , YOSHIKAWA MASAAKI , SATO MASAHIKO , TAKAGI HIROTADA , IMADA TAKAHIRO , GOTO SO , SUZUKI AKIRA , NAMEKATA SHINICHI , SAITO KAZUYA
IPC分类号： G03G15/20
CPC分类号： G03G15/2064 , G03G15/205 , G03G2215/2035
摘要： PROBLEM TO BE SOLVED: To provide a fixing device configured to control cold offset during the second fixation after power-on of a main power source, and to provide an image forming device.SOLUTION: A control part 200 of control means checks whether a series of fixing operation is the first fixing operation after power-on of a main power source or not (S3). When it is the first fixing operation after the power-on of the main power source, the control part sets a setting time A for the setting time of post-operation which is performed after a rear end of the last sheet passes through a nip part N in a series of fixing operation and rotates a fixing belt 121 and a pressure roller 122 as a pressure member while maintaining the fixing belt 121 being surface endless moving body at a predetermined temperature (S4), and performs longer post-operation than those after the second and subsequent fixing operations.
摘要翻译：要解决的问题：提供一种被配置为在主电源通电之后的第二次固定期间控制冷偏移并且提供图像形成装置的定影装置。解决方案：控制装置的控制部分200检查系列固定操作是主电源接通后的第一次定影操作（S3）。当在主电源通电之后的第一次定影操作时，控制部分设定在最后一个纸张的后端经过夹持部分之后执行的后期操作的设定时间的设定时间A N进行一系列定影操作，并且将定影带121和作为压力构件的加压辊122旋转，同时将定影带121保持在表面循环移动体的预定温度（S4），并且执行比后者更长的后期操作第二次和随后的定影操作。

9. 发明专利

JP2013164474A Fixation device and image formation apparatus 有权
标题翻译：固定装置和图像形成装置
公开(公告)号：JP2013164474A
公开(公告)日：2013-08-22
申请号：JP2012026635
申请日：2012-02-09
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： SAITO KAZUYA , UCHITANI TAKESHI , HASE TAKAMASA , YUASA SHUTARO , FUJIMOTO IPPEI , NAMEKATA SHINICHI , YAMASHINA RYOTA , SEO HIROSHI , WAIDA TAKUMI
IPC分类号： G03G15/20
CPC分类号： G03G15/2078 , G03G15/2007 , G03G15/2039 , G03G15/2042 , G03G15/2082 , G03G2215/2035
摘要： PROBLEM TO BE SOLVED: To provide a fixation device and an image formation apparatus capable of suppressing a fixation failure at printing on a small size sheet while suppressing power consumption in an entire apparatus.SOLUTION: A fixation device 100 includes: a surface endless moving body 121 formed hollow inside; a pressure member 122 making contact with an outer peripheral surface of the surface endless moving body; a nip formation member 124 making contact with the pressure member through the surface endless moving body and forming a nip part; heating means 123 arranged at the inner peripheral side and heating the surface endless moving body; and power supply means 51 for supplying electric power to the heating means. In the fixation device 100, the heating means includes: a first heat source 123A for heating an area of the surface endless moving body according to a width of a small size sheet; and a second heat source 123B for heating areas corresponding to both end portions in a width direction of a large size sheet. At printing a small size sheet, the power supplied to the first heat source is set so as not to exceed an upper limit of usable power as well as larger than the power supplied to the first heat source at printing a large size sheet.
摘要翻译：要解决的问题：提供一种能够抑制打印在小尺寸片材上的定影失败的定影装置和图像形成装置，同时抑制整个装置中的功率消耗。解决方案：固定装置100包括：表面无端移动体 121形成中空; 与表面无端移动体的外周面接触的压力部件122; 辊隙形成构件124通过表面无端移动体与压力构件接触并形成咬合部; 加热装置123，其布置在内周侧并加热表面无端移动体; 以及用于向加热装置供电的供电装置51。在固定装置100中，加热装置包括：第一热源123A，用于根据小尺寸片材的宽度加热表面无端移动体的区域; 以及第二热源123B，用于加热与大尺寸片材的宽度方向上的两个端部对应的区域。在打印小尺寸片材时，提供给第一热源的功率被设定为不超过可用功率的上限以及大于在打印大尺寸片材时提供给第一热源的功率。

10. 发明专利

JP2013164451A 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：JP2013164451A
公开(公告)日：2013-08-22
申请号：JP2012026165
申请日：2012-02-09
申请人： Ricoh Co Ltd , 株式会社リコー
发明人： HASE TAKAMASA , SATO MASAHIKO , NAMEKATA SHINICHI , ISHII KENJI , UCHITANI TAKESHI , OGAWA SADAFUMI , KAWADA TEPPEI , YOSHIURA ARINOBU , SHIMOKAWA TOSHIHIKO , YUASA SHUTARO , YAMAJI KENSUKE , YOSHIKAWA MASAAKI , YOSHINAGA HIROSHI , TAKAGI HIROTADA , IWATANI NAOKI , IMADA TAKAHIRO , GOTO SO , SESHIMO TAKUYA , SUZUKI AKIRA , SAITO KAZUYA
IPC分类号： G03G15/20
摘要： PROBLEM TO BE SOLVED: To provide a fixing device capable of suppressing the occurrence of plastic deformation in which the central part of a fixing member is depressed toward inside, and an image forming apparatus.SOLUTION: A control unit 200 being control means carries power equal to or more than a predetermined value to a halogen heater 123 as a heat source to heat a fixing belt 121, when a pressure roller 122 as a pressure member is in a rotating state, and a position detection sensor 180 is outputting a signal (Low signal) that is output when pressure applied between the fixing belt 121 as a fixing member and the pressure roller 122 is equal to or more than applied pressure exerted by rotation of the fixing belt 121 along with the pressure roller 122.
摘要翻译：要解决的问题：提供一种能够抑制固定构件的中心部向内侧压缩的塑性变形的固定装置和图像形成装置。解决方案：作为控制装置的控制单元200承载功率相等当作为加压构件的加压辊122处于旋转状态时，作为加热定影带121的热源的卤素加热器123达到或大于预定值，位置检测传感器180输出信号（低信号），其作为固定构件的定影带121和加压辊122之间施加的压力等于或大于通过定影带121与加压辊122的旋转而施加的施加压力。

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