CN1148612C - Image forming device - Google Patents

Image forming device Download PDF

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CN1148612C
CN1148612C CN 98105962 CN98105962A CN1148612C CN 1148612 C CN1148612 C CN 1148612C CN 98105962 CN98105962 CN 98105962 CN 98105962 A CN98105962 A CN 98105962A CN 1148612 C CN1148612 C CN 1148612C
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intermediate transfer
image
transfer
charge
member
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CN 98105962
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Chinese (zh)
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CN1199877A (en )
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行方伸一
俞英雄
内田智
高桥充
川越克哉
小野博司
本桥俊昭
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株式会社理光
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    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/01Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
    • G03G15/0105Details of unit
    • G03G15/0131Details of unit for transferring a pattern to a second base
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/14Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/1605Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support
    • G03G15/161Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support with means for handling the intermediate support, e.g. heating, cleaning, coating with a transfer agent
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00Apparatus for electrophotographic processes
    • G03G2215/01Apparatus for electrophotographic processes for producing multicoloured copies
    • G03G2215/0167Apparatus for electrophotographic processes for producing multicoloured copies single electrographic recording member
    • G03G2215/0174Apparatus for electrophotographic processes for producing multicoloured copies single electrographic recording member plural rotations of recording member to produce multicoloured copy
    • G03G2215/0177Rotating set of developing units

Abstract

本发明涉及使用中间转印体的图像形成装置,设有中间转印体、一次转印电荷赋与装置、中间转印体消电装置,使消电电荷与中间转印体的表面电位成正比。 The present invention relates to an image forming apparatus of an intermediate transfer body, provided with an intermediate transfer member, first transfer charge-imparting means, a discharging means intermediate transfer member, so that the surface potential is proportional to the electrical charge consumption of the intermediate transfer body . 例如,设置控制部,根据中间转印带的表面电位,切换带消电充电器的消电条件,如根据墨像转印次数,切换从消电用电源施加在带消电充电器上的直流电压。 For example, a control unit, in accordance with the surface potential of the intermediate transfer belt, consumption condition switching electric charge elimination with a charger, such as according to the number of ink transfer, with the switching current on the power consumption of the charger power source is applied from the charge elimination Voltage. 这样能对中间转印带均一消电,以备进行后面的墨像转印。 This can uniformly erasing the intermediate transfer belt, the toner image transferred to prepare for the latter.

Description

图像形成装置 The image forming apparatus

技术领域 FIELD

本发明涉及复印机、打印机、传真机等图像形成装置,详细地说,涉及使用中间转印体的图像形成装置。 The present invention relates to a copier, a printer, a facsimile image forming apparatus, and more particularly, relates to using image forming apparatus of an intermediate transfer body.

背景技术 Background technique

以往,这种图像形成装置设有载置从像载体转印的墨像的中间转印体、利用静电力将用于上述像载体使墨像转印在上述中间转印体的电荷赋与上述中间转印体的一次电荷赋与装置、利用静电力将用于从该中间转印体使墨像转印在转印材上的电荷赋与该转印材或转印材载体的二次电荷赋与装置、对将墨像转印在转印材上的上述中间转印体的表面消电的中间转印体的消电装置,上述图像形成装置为人们所知。 Conventionally, such an image formed from the image carrier onto the mounting of the toner image of the intermediate transfer body, using electrostatic image carrier to be used for the above-described ink image onto the intermediate transfer member forming a charge in the above-described apparatus is provided with It means a charge-imparting intermediate transfer body, using electrostatic force from the intermediate transfer member used in the ink image is transferred to the charge-imparting material transfer carrier or a transfer material on the transfer material of the second charge-imparting means , the ink image on the intermediate transfer body erasing means erasing a surface of a transfer material is transferred onto the intermediate transfer member, the image forming apparatus are known. 在该图像形成装置中,通过用中间转印体消电装置使中间转印体的表面在墨像转印到转印材上之后消电,使中间转印体的表面电位均一化,除去附在中间转印体上的残留墨粉等附着物,以进行后面的从像载体往中间转印体的一次转印。 In the image forming apparatus by a discharging apparatus using the intermediate transfer body surface of the intermediate transfer body is transferred onto the ink image on the transfer sheet after the erasing, the surface potential of the intermediate transfer body homogenization, removing attached deposits such as residual toner on the intermediate transfer member to perform a primary transfer from the image carrier to the intermediate transfer body behind.

但是,在上述以往图像形成装置中,即使用上述中间转印体消电装置使中间转印体消电,有时还会存在中间转印体的表面电位不成为所定电位、电位不均残留等现象,若存在这种消电不良现象,会对后面的从像载体往中间转印体的转印工序带来坏影响。 However, in the conventional image forming apparatus, i.e., using the electrical elimination apparatus of intermediate transfer member of the intermediate transfer body erasing, and sometimes the presence of the surface potential of the intermediate transfer body does not become a potential, residual potential unevenness phenomenon predetermined If this undesirable phenomenon erasing, it will adversely affect transfer step to an intermediate transfer body from the back of the image carrier.

本发明的发明人对上述中间转印体的消电不良原因进行了研究,发现消电前的中间转印体的表面电位很离散是上述消电不良的主要原因。 The inventors of the present invention, the improper cancellation of the intermediate transfer member is electrically conducted studies, we found that the surface potential of the intermediate transfer body before the discrete charge elimination is the main reason is a poor charge elimination above.

尤其当进行若干次的一次转印,以便将像载体上形成的各色墨像叠合在上述中间转印体、然后将中间转印体上的叠合墨像一次转印在转印材的图像形成装置场合,用上述中间转印体消电装置消电前的中间转印体的表面电位很离散,其与叠合在中间转印体上的墨像数、即对中间转印体的一次转印的次数有关。 Especially when the primary transfer several times, so as to form a color ink image on the image carrier is superimposed on the intermediate transfer member, and then the primary transfer toner images superimposed on the intermediate transfer body in the transfer image forming material means the case, it is the surface potential of the discrete intermediate transfer body before the electrical charge elimination means eliminating intermediate transfer member, with the number of toner images superimposed on the intermediate transfer member, i.e., the intermediate transfer body one turn the number of printed about.

另外,在上述以往图像形成装置中,由于分别设置对上述中间转印体的表面消电的电晕放电器等中间转印体消电装置及清除中间转印体表面附着物的清洁装置,所以要实现低成本化很难。 Further, in the above conventional image forming apparatus, since the corona are provided intermediate the intermediate transfer body surface charge removing discharger charge elimination device and the like transfer body attachment and removal surface of the intermediate transfer body cleaning device, so to achieve cost reduction difficult.

在上述以往图像形成装置中,将中间转印体的墨像转印在转印材上时的转印条件通常定为使往转印材的转印效率成为所定值以上的合适转印范围的大致中央。 In the conventional image forming apparatus, the toner image transfer intermediate transfer body condition on the transfer material is generally set as the transfer efficiency to a transfer material is substantially above the center of the range of values ​​suitable transfer a predetermined . 该转印条件的设定值与上述合适转印范围的上下限的差和将中间转印体的墨像转印在转印材上时的转印容限相对应,该差越大转印容限越大。 The set value of the ink transfer condition suitable transfer image is transferred to the above-described range and the difference between the upper and lower limits of the intermediate transfer body at the upper margin of the transfer material corresponds to the difference between the larger transfer capacity The larger the limit.

这里,若从像载体往中间转印体墨像的一次转印通过后的墨像包含墨粉附着量不同的部分,在该中间转印体上的墨像内会产生带电量的离散。 Here, if the amount of toner adhering containing different portions from the image carrier after the toner image to the intermediate transfer body by transferring a toner image, will produce discrete charge amount within toner images on the intermediate transfer body. 例如,上述中间转印体上的墨像包含全色调部及半色调部时,全色调部的带电量比半色调部小。 For example, the toner image on the intermediate transfer member comprises a portion at full tone and half-tone portion, smaller than the charging portion full color halftone portion. 另外,若例如彩色图像形成装置场合,中间转印体上的墨像叠合部分的带电量比仅有单色墨粉附着的部分小。 Further, when the color image forming apparatus, for example, the case, the charging ratio of the toner image superimposed on the intermediate portion of the transfer member only a small portion of the monochromatic toner adhering.

从像载体往中间转印体转印墨像的一次转印部通过后的墨像内的带电量离散有时还会因该中间转印体的表面移动方向的上述一次转印部的邻接下流侧产生的剥离放电而发生。 After passing through the primary transfer portion from the image carrier to an intermediate image transfer member with the ink transfer amount in the ink as discrete and sometimes also adjacent to the downstream portion of the primary transfer due to the movement direction of the surface side of the intermediate transfer body exfoliation discharge occurs.

这样,若中间转印体上的墨像内带电量发生离散,转印特性相互不同部分会存在于同一墨像内。 Thus, if the charge amount of the toner image on the intermediate transfer member occurs discrete, transfer characteristics from each other the various parts of the ink present in the same image. 若在相同转印条件下将该转印特性不同的所有部分转印在转印材上,则由于能以所定值以上转印率转印墨像整体的转印条件的范围变狭,所以对于墨像整体的转印容限降低,不能稳定地将墨像转印在转印材上。 If under the same transfer condition of the transfer characteristics of different portions of all transferred onto a transfer material, since the ink can be transferred to a predetermined value or more as the transfer rate of the entire range of transfer conditions becomes narrow, so the ink image transfer tolerances reduced overall, not on the transfer sheet stably in the ink image is transferred.

图10中曲线a和曲线b分别表示对于全色调部及半色调部的转印电流与转印率的关系,模式地显示了转印特性。 10 curve a and the curve b respectively represent the relationship between the transfer current and the transfer to the full tone of a halftone portion and the portion, schematically shows the transfer characteristics. 图中的符号A及B表示的宽度是能以转印率80%以上将各部转印在转印材上的转印电流的范围,转印容限较大。 FIG symbols A and B represents the width of the energy transfer of 80% or more in the range of transfer current departments transferred onto the transfer material, the transfer margin larger. 但是,由于两转印特性曲线有偏离,上述二部分都能以转印率80%以上进行转印的转印电流的范围变狭,如图中符号C所示,转印容限降低。 However, since there are two transfer characteristic curve deviates from the above two parts can be transferred to a range of 80% for transfer of the transfer current becomes narrow, as shown in the symbol C, a lowering of transfer margin.

发明内容 SUMMARY

本发明是鉴于上述先有技术所存在的问题而提出来的,其目的在于,提供一种墨像转印在转印材上后能对中间转印体均一消电、以备后面的从像载体进行墨像转印的图像形成装置。 The present invention is made in view of the problems the prior art proposed by the above-described first object thereof is to provide an ink image is transferred on the transfer sheet after the intermediate charge elimination can transfer the homogenization, to prepare the latter from the image carrier transferring the ink image image forming apparatus.

本发明的另一个目的在于,提供一种通过设置能兼用作中间转印体消电装置与中间转印体清洁装置的导电性刷部件、能实现比分别设置上述两装置场合成本低的图像形成装置。 Another object of the present invention is to provide a setting by the intermediate transfer body can be also used as the charge elimination device and the conductive brush member is an intermediate transfer body cleaning device can achieve a low cost than the case where two are provided above the image forming apparatus device.

本发明的再一个目的在于,提供一种即使从像载体转印的中间转印体上的墨像内带电量发生离散也能抑制该墨像转印在转印材上时的转印容限的降低、能将该墨像稳定地转印在转印材上的图像形成装置。 A further object of the present invention is to provide a charge amount occurs even if discrete from the ink image on the image carrier onto the intermediate transfer body can be suppressed in the ink image is transferred at a transfer margin on the transfer material decreases, the ink can be stably transferred image on the transfer material is an image forming apparatus.

为了实现上述目的,本发明提出一种图像形成装置,其包括:载置从像载体转印的墨像的中间转印体;将用于从像载体往中间转印体转印墨像的电荷赋与该中间转印体的一次转印电荷赋与装置;中间转印体消电装置,将消电电荷赋与中间转印体,以对已将墨像转印在转印材上的上述中间转印体的表面进行消电;其特征在于:上述消电电荷的电压与中间转印体的表面电位成正比。 To achieve the above object, the present invention provides an image forming apparatus, comprising: placing the image carrier onto the intermediate transfer member of the toner image; will be used to charge the intermediate transfer member transferring the ink image from the image carrier first transfer charge imparting means imparting the intermediate transfer body; intermediate transfer member charge elimination means to eliminate the electric charge forming the intermediate transfer member to the intermediate transfer image on the transfer of ink has material surface of the transfer member is a discharging; characterized in that: a voltage proportional to the surface potential of the intermediate transfer body the electrical charge dissipation.

根据本发明的图像形成装置,其特征还在于:将已形成在上述像载体上的墨像若干次叠合转印在上述中间转印体上;根据上述往中间转印体的墨像转印次数,切换上述中间转印体消电装置所得到的消电电荷的电压。 Image forming apparatus according to the present invention is further characterized in that: several superimposed toner image formed on the image carrier is transferred on said intermediate transfer body; according to the above-described ink image to the intermediate transfer body is transferred frequency switching voltage electrostatic charge dissipation of the charge elimination means intermediate transfer body obtained in the above.

根据本发明的图像形成装置,其特征还在于:根据上述往中间转印体的墨像转印次数,切换由上述一次转印电荷赋与装置所赋与的电荷的电压。 Image forming apparatus according to the present invention is further characterized in that: the above-described ink to the intermediate transfer body as the number of transfers, the voltage by the charge switching primary transfer charge-imparting means imparting the above.

根据本发明的图像形成装置,其特征还在于:设有将用于从上述中间转印体往转印材转印墨像的电荷赋与上述转印材体载体的二次转印电荷赋与装置;根据在充电操作期间上述中间转印体是否面对上述二次转印电荷赋与装置切换从上述中间转印体消电装置所得到的消电电荷的电压。 Image forming apparatus according to the present invention is characterized in further comprising: a charge provided to the transfer sheet for transferring the ink image from the intermediate transfer member forming a secondary transfer charge-imparting means and the transfer member carrier member; the face of the intermediate transfer member if the charge voltage of the secondary transfer device switches impart electrostatic charge dissipation from the intermediate transfer member a discharging means is obtained during the charging operation.

根据本发明的图像形成装置,其特征还在于:设有移动速度控制装置,根据转印材的厚度,切换中间转印体的移动速度;根据上述中间转印体的移动速度切换从上述中间转印体消电装置所得到的消电电荷的电压。 The image forming apparatus according to the invention, which is characterized in further comprising: a moving speed controlling device is provided, in accordance with the thickness of the transfer sheet, the switching of the moving speed of the intermediate transfer body; switching from the intermediate transfer according to moving speed of the intermediate transfer body electrical elimination apparatus body obtained voltage electrostatic charge dissipation.

根据本发明的图像形成装置,其特征还在于:使用电晕消电器作为上述中间转印体消电装置,施加包括直流成分和交流成分的电压;上述消电电荷改变施加在上述电晕消电器上的直流成分大小。 Image forming apparatus according to the present invention is characterized in further comprising: a corona discharger as the intermediate transfer member erasing means applies a voltage comprising AC component and a DC component; and the charge elimination is applied to the above charge alteration corona discharger the DC component size.

根据本发明的图像形成装置,其特征还在于,中间转印体是一至少具有第一和第二层的带。 The image forming apparatus according to the invention, further characterized in that the intermediate transfer body having at least a first and a second belt layer.

根据本发明的图像形成装置,其特征还在于,设有:导电性刷部件,该刷部件与将墨像转印在上述转印材上后的上述中间转印体相接触,进行中间体的消电以及清洁;电源,该电源将与中间转印体的表面电位相反极性的偏压施加在上述导电性刷部件上。 The image forming apparatus according to the invention, further characterized in that a: the conductive brush member, with the brush member in contact with the ink image is transferred on the intermediate transfer member after the transfer of the material to de intermediate and a cleaning power; a power supply is applied on the conductive member and the brush bias polarity opposite to the surface potential of the intermediate transfer body.

根据本发明的图像形成装置,其特征还在于,使用可回转的导电性刷辊作为上述导电性刷部件。 Image forming apparatus according to the present invention, further characterized in that a conductive brush roller rotatably as the conductive brush member.

根据本发明的图像形成装置,其特征还在于,设有预转印带电装置,使转印到上述转印材前的上述中间转印体上的墨像带电。 Image forming apparatus according to the present invention, further characterized in that a pre-transfer charging device, so that the charged toner image transferred to the intermediate transfer member on the transfer material before.

根据本发明的图像形成装置,其特征还在于,设有控制装置,该控制装置根据通过上述预转印带电装置的带电位置的中间转印体的表面移动速度,控制上述预转印带电装置的输出。 Image forming apparatus according to the present invention, further characterized in that a control means, the control means in accordance with a surface moving speed of the charging member through the intermediate transfer position of the pre-transfer charging device, for controlling the pre-transfer charging device output.

下面说明本发明的效果。 The effects of the present invention.

按照本发明,即使消电前的中间转印体的表面电位离散也能对中间转印体均一消电,以备进行后面的从像载体的墨像转印。 According to the present invention, even if the surface potential of the intermediate transfer body before the dispersion of erasing charge elimination can be an intermediate transfer body to a uniform, to prepare for later ink image from the transfer image carrier.

按照本发明,即使因往中间转印体转印次数不同而引起消电前的中间转印体的表面电位离散,也能对中间转印体均一消电,以备进行后面的从像载体的墨像转印。 According to the present invention, even if the intermediate transfer body to a different frequency and to cause the surface potential of the intermediate transfer body before erasing discrete homogenization erasing can be transferred to an intermediate, to prepare for later from the image carrier the ink image is transferred.

按照本发明,即使因中间转印体是否与电荷赋与动作中的二次转印电荷赋与装置对向而引起消电前的中间转印体的表面电位离散,也能对中间转印体均一消电,以备进行后面的从像载体的墨像转印。 According to the present invention, the surface potential of the intermediate transfer body before even if the intermediate transfer member and the secondary transfer if the charge-imparting means imparting a charge operation of the electrical dispersion induced elimination, but also the intermediate transfer member erasing uniformly to prepare an ink image is transferred from the image carrier behind.

按照本发明,即使因中间转印体的移动速度不同而引起消电前的中间转印体的表面电位离散,也能对中间转印体均一消电,以备进行后面的从像载体的墨像转印。 According to the present invention, the surface potential of the intermediate transfer body before even if the moving speed of the intermediate transfer body different caused discrete erasing, charge elimination can be an intermediate transfer body to a uniform, to prepare for later ink from the image carrier like the transfer.

按照本发明,使用电晕消电器作为中间转印体消电装置,通过切换施加在上述电晕消电器上的电压之中的容易控制的直流成分,能很容易对中间转印体进行消电控制。 According to the present invention, a corona discharger as an intermediate transfer member a discharging means, a DC component is applied in an easily controllable voltage on the corona discharger by switching, can easily eliminate the intermediate transfer body electrically control.

按照本发明,仅使用一个导电性刷部件与中间转印体接触就能进行对该中间转印体的消电及清洁,与分别设置中间转印体的消电装置和清洁装置相比,能实现低成本化。 According to the present invention, only one conductive brush member in contact with the intermediate transfer body cleaning and charge elimination can be carried out on the intermediate transfer body, are provided as compared with the charge elimination means and cleaning means intermediate transfer body, can the cost.

按照本发明,即使从像载体转印的中间转印体上的墨像内的带电量离散,也能抑制该中间转印体上的墨像往转印材转印时的转印容限的低下,能稳定地转印该墨像。 According to the present invention, even if the charge amount from the toner image on the image carrier onto the intermediate transfer body discrete, tolerance can be suppressed when the transfer of the ink on the intermediate transfer member to a transfer material transferred image is low , the ink can be stably transferred image.

按照本发明,即使在上述预转印带电装置使中间转印体上的墨像带电途中、中间转印体的表面移动速度变化,也能使该中间转印体上的墨像整体均一带电,确实防止转印容限的低下。 According to the present invention, even in the pre-transfer charging means charging the way ink image on the intermediate transfer member, a surface moving speed of the intermediate transfer body changes, the ink can be uniformly charged as a whole on the intermediate transfer member, transferred reliably prevent low tolerance.

附图说明 BRIEF DESCRIPTION

图1是涉及本发明第一实施例的彩色复印机的概略构成图;图2是用于上述彩色复印机的中间转印带的截面图;图3是上述彩色复印机的一次转印部的放大图;图4是上述彩色复印机的带消电充电器的控制方框图;图5a-c分别表示中间转印带的表面电位的变化、带消电充电器的开/关时间及一次转印偏压装置的输出图;图6是涉及本发明第二实施例的彩色复印机的概略构成图;图7是涉及变型例的导电性刷部件的概略构成图;图8是控制PTC的带电条件的控制系统的方框图;图9a-b分别表示厚纸模式的中间转印带的驱动马达及PTC的栅压控制的时间图;图10是表示二次转印部的转印电流和转印率的关系的显示转印特性的模式图。 FIG 1 is a schematic configuration diagram of a color copying machine involving the first embodiment of the present invention; FIG. 2 is a sectional view of a color copying machine of the above-described intermediate transfer belt; FIG. 3 is a enlarged view of a transfer unit of the color copying machine; FIG 4 is a block diagram of the battery charger with elimination control the color copying machine; FIG. 5a-c indicate changes in the surface potential of the intermediate transfer belt, band elimination battery charger ON / oFF time and the primary transfer bias means output FIG; schematic block diagram of Figure 6 relates to a second embodiment of the present invention is a color copier; a block diagram of FIG. 8 is a control system controlling PTC charging condition; Figure 7 is an schematic configuration of FIG conductive brush member modification ; Figure 9a-b, respectively, a time chart showing the driving motor of the intermediate transfer belt of the thick paper mode, and the control gate voltage of PTC; FIG. 10 is a display showing the relationship between the transfer current and the transfer rate of the secondary transfer portion of the transfer FIG printed pattern characteristics.

具体实施方式 detailed description

下面,说明本发明的实施例,其是将本发明适用在作为图像形成装置的电子照相式彩色复印机(以下简称为“彩色复印机”)中。 Next, embodiments of the present invention, which is applicable to the present invention is an electrophotographic type color copying machine (hereinafter referred to as "color copying machine") as an image forming apparatus.

图1是涉及本发明实施例的彩色复印机主要部分的图像形成部的概略构成图,该彩色复印机除了图1所示图像形成部之外,还有没有图示的彩色图像读取部(以下简称为“彩色扫描器”)、供纸部及控制部等。 FIG 1 is a schematic configuration diagram relates to an image forming section of a main part of a color copying machine of the embodiment of the present invention, the color copying machine in addition to the image forming unit shown in FIG. 1, as well as a color image reading portion (not shown) (hereinafter referred to as as "color scanner"), a paper feed unit and a control unit and the like.

上述彩色扫描器以例如红、绿、蓝(以下分别简记为“R、G、B”)色分解光读取原稿的彩色图像情报,变换成图像的电气信号。 In the color scanner such as red, green, and blue (hereinafter simply referred to as "R, G, B") color separation optical information reading an original color image, the image is converted into an electric signal. 并且以用该彩色扫描器所得的R、G、B的色分解图像信号强度电平为基础,在没有图示的图像处理部进行色变换处理,得到黑、青、品红、黄(以下分别简记为“Bk、C、M、Y)的彩色图像数据。 And in the color scanner with the resulting R, G, B of the color separation image signal strength levels as the basis for color conversion processing in the image processing unit (not shown), to give the black, cyan, magenta, yellow (hereinafter color image data is abbreviated as "Bk, C, M, Y) is.

图1的图像形成部由作为像载体的感光体鼓100、作为带电装置的带电充电器200、清洁刮片及毛刷组成的感光体清洁装置300、作为曝光装置的没有图示的写入光学组件、作为显影装置的旋转式显影组件400、中间转印组件500、纸转印组件600、使用一对定影辊701的定影组件等构成。 The image forming unit of FIG. 1 by the cleaning device 300 is a photoreceptor as an image carrier is a photoreceptor drum 100, a charging device as a charging charger 200, a cleaning blade and a brush composed of the exposure apparatus is not shown optical writing assembly, a rotary developing assembly developing device 400, the intermediate transfer unit 500, a paper transfer unit 600, a pair of fixing roller 701 and the like constituting the assembly.

上述感光体鼓100沿箭头反时针方向回转、在其周围配置有带电充电器200、感光体清洁装置300、旋转式显影组件400所选择的显影器、中间转印组件500的作为中间转印体的中间转印带501等。 The photosensitive drum 100 in a counterclockwise direction of arrow rotation, around which is disposed a charger as an intermediate transfer body 200, a photoreceptor cleaning device 300, a rotary developing assembly 400 of the selected developing unit, an intermediate transfer assembly 500 intermediate transfer belt 501 and the like.

另外,上述写入光学组件将来自彩色扫描器的彩色图像数据变换成光信号,在通过带电充电器被均一带电的感光体鼓100的表面上进行与原稿图像对应的光写入,在感光体鼓100上形成静电潜像。 Further color image data, the writing component from the color optical scanner is converted into an optical signal, the optical writing corresponding to the original image on the surface is uniformly charged by the charging charger photoreceptor drum 100, the photoreceptor on the drum 100 to form an electrostatic latent image. 该写入光学组件以例如作为光源的半导体激光器、激光发光驱动控制部、多角棱镜及其回转用马达、f/θ透镜、反射镜等构成。 The write optical assembly, for example a semiconductor laser light source, a laser light emission control driving unit, and the turning motor polygon prism, f / θ lens, a mirror or the like.

上述旋转式显影组件400由使用Bk墨粉的Bk显影器401、使用C墨粉的C显影器402、使用M墨粉的M显影器403、使用Y墨粉的Y显影器404以及使组件整体作反时针回转的显影旋转驱动部等构成。 The rotary type developing assembly 400 used by the Bk Bk toner developing unit 401, the C developing device 402 toner C, M using M toner developing unit 403, using the Y toner in the Y developing unit 404, and the entire assembly counterclockwise rotation of the developing rotary drive unit and the like. 设置在该旋转式显影组件400中的各显影器由显影套筒、显影剂搅拌器、显影辊驱动部等构成,显影套筒作为显影剂载体,为使静电潜像显影,使显影剂的磁穗接触感光体鼓100的表面而回转,显影剂搅拌器为汲起显影剂加以搅拌而回转,显影辊驱动部使显影辊朝顺时针箭头方向回转。 Each developing device provided in the rotary developing unit 400 is constituted by the developing sleeve, the developer agitator, and the like developing roller driving unit, a developing sleeve as a developer carrier for developing an electrostatic latent image, the developer magnetic the surface of revolution 100 of the ear contacts the photosensitive drum, developer agitator to be pumped from the developer stirring and rotates, the developing roller driving section direction of the developing roller rotation clockwise arrow.

在本实施例中,各显影器内的墨粉通过与铁氧体载体的搅拌而带负电,通过没有图示的作为显影偏压施加装置的显影偏压电源将交流电压Vac(交流成分)重叠在负的直流电压Vdc(直流成分)上的显影偏压施加在各显影套筒上,显影套筒对于感光体鼓100的金属基体层被施偏压到所定电位。 In the present embodiment, each of the toner in the developing unit negatively charged by stirring with a ferrite carrier by a developing bias power source (not shown) as a developing bias applying means to an AC voltage Vac (alternating current component) superimposed developing bias Vdc of the negative DC voltage (DC component) is applied to each developing sleeve, the developing sleeve to the photosensitive drum 100 is a metal base layer is applied to a predetermined biasing potential.

在彩色复印机本体的待机状态下,旋转显影组件400在Bk显影器401位于显影位置的原来位置停止,复印动作一开始,从所定时间起彩色扫描器1开始读取Bk彩色图像数据,根据该彩色图像数据,通过激光进行光写入,形成静电潜像(以下,将根据Bk图像数据所形成的静电潜像称为“Bk静电潜像”,对于C、M、Y也相同)。 , The developing assembly 400 stops rotating in a standby state in the original color copying machine main body 401 is located at the developing position of the Bk development position, a copying operation starts, since the predetermined time from the color scanner 1 starts reading Bk color image data, based on the color image data writing by laser light to form an electrostatic latent image (hereinafter, referred to as "Bk electrostatic latent image" according to the electrostatic latent image formed by the Bk image data for C, M, Y are the same). 在静电潜像前端部到达可显影的Bk显影位置前,使Bk显影套筒开始回转,用Bk墨粉使Bk静电潜像显影。 Before the front end portion of the electrostatic latent image reaches the developing position of the Bk may be developed, so that Bk developing sleeve starts rotating, so that the toner with the Bk Bk electrostatic latent image. 此后,Bk静电潜像区域的显影动作继续进行,在Bk静电潜像的后端部通过Bk显影位置时,旋转显影组件400回转,后面颜色的显影器快速来到显影位置。 Thereafter, the electrostatic latent image region Bk developing operation proceeds, the rear end portion of the Bk electrostatic latent image passes the developing position of the Bk, the rotation of the developing rotary assembly 400, behind the color developer to the developing position quickly. 该动作至少在根据后面的图像数据所形成的静电潜像前端部到达前结束。 The operation ends at least before reaching the distal end portion of the electrostatic latent image according to image data later formed.

上述中间转印组件500由作为中间转印体的中间转印带501等构成,该中间转印带由若于辊架设着。 The intermediate transfer unit 500 is composed of the intermediate transfer belt 501 as an intermediate transfer body and the like, the intermediate transfer belt by the roller when in the erected. 在上述中间转印带501的周围配置有作为转印前带电装置的预转印充电器(以下简记为“PTC”)502、纸转印组件600的作为转印材载体的二次转印带601、作为二次转印电荷赋与装置的二次转印偏压辊605、作为中间转印体消电装置的带电充电器503、作为中间转印体清洁装置的带清洁刮片504、作为润滑剂涂布装置的润滑剂刷505等。 Around 501 in the intermediate transfer belt pre-transfer charger is arranged as the pre-transfer charging device (hereinafter referred to as "PTC") 502, a paper transfer unit 600 as a transfer material of the carrier with the secondary transfer 601, as the secondary transfer bias of the secondary transfer roller 605 and a charge forming apparatus as an intermediate transfer drum charger 503 charge elimination apparatus body, as an intermediate transfer belt cleaning blade of the cleaning apparatus 504, as lubricant lubricant applicator brush 505 and the like.

中间转印带501由作为一次转印电荷赋与装置的一次转印偏压辊507、带驱动辊508、带张紧辊509、二次转印对向辊510、清洁对向辊511及作为一次转印前消电装置的带消电辊512所架设着。 Intermediate transfer belt 501 as primary transfer bias roller transfer charge-imparting apparatus 507, by the belt driving roller 508, a belt tension roller 509, secondary transfer opposing roller 510, a cleaning opposed roller 511 and a a pre-transfer charge elimination with a charge elimination device 512 to set up the roll. 各辊由导电性材料形成,一次转印偏压辊507以外的各辊接地。 Each roller is formed of a conductive material, the rollers other than the ground first transfer bias rollers 507. 通过以定电流或定电压控制的一次转印电源801,将根据墨像叠合数控制为所定大小的电流或电压的转印偏压供给一次转印偏压辊507。 Primary transfer power source 801 through a constant current or constant voltage control, according to the number of superposed toner image transfer bias is controlled to supply a predetermined current or voltage magnitude of the primary transfer bias roller 507. 另外,通过没有图示的驱动马达驱动回转的带驱动辊508驱动中间转印带501沿箭头方向转动。 Further, by driving the driving motor (not shown) rotating with the drive roller 508 drives the direction of the intermediate transfer belt 501 is rotated in the arrow.

如图2截面图所示,上述中间转印带501由表层501a,中间层501b、基层501c组成的多层结构带材构成。 Cross section shown in FIG 2, the intermediate transfer belt 501 from the multilayer structure of the strip surface layer 501a, intermediate layer 501b, 501c composed of the base layer configuration. 与感光体鼓100接触的外周面侧是表层501a,内周面侧是基层501c。 100 in contact with the photoreceptor drum outer peripheral surface side surface layer 501a, the base layer is the inner circumferential side 501c. 中间层501b和基层501c之间有用于粘接上述两层的粘接层501d。 An adhesive layer 501d is used for bonding the two layers between the intermediate layer and the base layer 501b 501c.

在将感光体鼓100上的墨像转印在中间转印带501上的转印部(以下称为“一次转印部”),通过架设着一次转印偏压辊507及带消电辊512使中间转印带501接触感光体鼓100侧,在感光体鼓100和中间转印带501之间形成所定宽度的接触(nip)部。 In transferring the toner image on the photosensitive drum 100 is transferred on the intermediate transfer belt unit 501 (hereinafter referred to as "primary transfer portion"), set up by the primary transfer bias roller 507 and the roller with the charge elimination 512 intermediate transfer belt 501 contacts the photosensitive drum 100 side, in the middle of the photoreceptor drum 100 and the transfer contact with a predetermined width (NiP) portion 501 is formed between belt. 使作为一次转印部消电装置的接地的带消电刷513与该接触部的中间转印带501的内周面相接。 Serving as the primary transfer portion of the ground charge elimination means eliminating brush 513 with the contacting portion with the intermediate transfer belt 501 in contact with the inner circumferential surface.

如图3所示,上述一次转印部的接触宽度Wn与上述接触部的从带转动方向下流端到带消电刷513的相接位置的距离L设定为能得到所定的转印条件。 3, the primary direction of rotation from the tape strip from the downstream end 513 of the brush arc contact position L is set to a predetermined transfer condition can be obtained a contact width Wn of the transfer portion to the contact portion.

在上述一次转印部已从感光体鼓100转印的中间转印带501上的墨像转印到作为转印材的复印纸之前,上述PTC502使该墨像均一带电。 In the primary transfer from the photosensitive portion of the ink image on the intermediate transfer belt 501 before transfer drum 100 as the copy sheet is transferred to a transfer material the toner image so that the PTC502 uniformly charged.

使用仅施加AC电压或施加AC+DC电压的放电器作为上述带消电充电器503。 Examples of the use of the charger 503 is applied with only the erasing AC voltage or AC + DC voltage applied to the arrester. 另外,上述带清洁刮片504相对架设在清洁对向辊511的部分的中间转印带501以逆方式相接,通过没有图示的接离机构能够进行切换,使该带清洁刮片相对中间转印带501相接或离开。 Further, the belt cleaning blade 504 relative to the erection of the intermediate transfer cleaning roller 511 to the intermediate portion of the belt 501 engaged in a reverse manner, can be switched off by the contact mechanism not shown, so that the belt cleaning blade relative contact 501 or away from the transfer belt.

上述带消电充电器503及带清洁刮片504按如下所述控制开关,例如,形成一张全彩色图像时,二次转印结束后,至少中间转印带501运行全一周结束前,使带消电充电器513设于接通位置,带清洁刮片504与中间转印带501相接。 The belt 503 and the charge removing charger belt cleaning blade 504 follows the control switch, for example, forming a full-color image, after the end of secondary transfer, the intermediate transfer belt 501 runs at least before the end of the whole week so with elimination battery charger 513 is provided to a closed position with the cleaning blade 504 in contact with the intermediate transfer belt 501. 当重复形成全彩色图像时,二次转印结束后,在随后的墨像的前端分别到达消电位置及清洁位置之前,使带消电充电器503设于接通位置,带清洁刮片504与中间转印带501相接。 When forming a full color image is repeated after the secondary transfer ends, the front end of a subsequent toner image, respectively, before erasing the cleaning position and the arrival position, the tape erasing charger 503 is provided to a closed position, the belt cleaning blade 504 in contact with the intermediate transfer belt 501. 当形成一张单彩色图像时,一次转印结束后,至少中间转印带501运行全一周结束前,使带消电充电器503设于接通位置,带清洁刮片504与中间转印带501相接。 When forming a single color image, the rear end of the primary transfer, the intermediate transfer belt 501 runs at least one week before the end of the whole, the tape erasing charger 503 is provided to a closed position with the cleaning blade 504 and the intermediate transfer belt 501 in contact. 当重复形成单彩色图像时,一次转印结束后,在随后的墨像的前端分别到达消电位置及清洁位置之前,使带消电充电器503设于接通位置,带清洁刮片504与中间转印带501相接。 When forming a single color image is repeated, after the primary transfer ends, the front end of a subsequent toner image, respectively, before erasing the cleaning position and the arrival position, the tape erasing charger 503 is provided to a closed position, and the belt cleaning blade 504 intermediate transfer belt 501 in contact.

上述润滑剂涂布刷505研磨成型为板状、作为润滑剂的硬脂酸锌506,将研磨而得的微粒涂布在中间转印带501上。 Polishing of the lubricant application brush 505 molded into sheet, zinc stearate as a lubricant 506, milled particles obtained by coating on the intermediate transfer belt 501. 该润滑剂涂布刷505也设置成可相对中间转印带501接离,控制其在所定时间与中间转印带501接触。 The lubricant application brush 505 disposed so as to be opposite from the intermediate transfer belt 501 contact, controlled at a predetermined time in contact with the intermediate transfer belt 501.

上述纸转印组件600由二次转印带601等构成,该二次转印带601由三个支承辊602-604架设着,支承辊602、603间所架设着的二次转印带601相对上述二次转印对向辊510上的中间转印带501可压接。 Said paper transfer means 600 is constituted by the secondary transfer belt 601. The secondary transfer belt 601 by the erection of the three support rollers 602-604, the erection of the support rollers 602, 603 between the secondary transfer belt 601 relative to the secondary transfer to the intermediate transfer belt 501 on roller 510 can be pressed. 三个支承辊602-604中之一是驱动辊,其由没有图示的驱动装置回转,通过该驱动辊,二次转印带601被驱动运转。 One of the three support rollers 602-604 is a drive roller, which is driven by the rotation means (not shown), through which the driving roller, a secondary transfer belt 601 is driven and rotated. 上述二次转印偏压辊605与上述二次转印对向辊510之间挟持着中间转印带501、复印纸及二次转印带601,通过定电流控制的二次转印电源802施加所定电流的转印偏压。 The secondary transfer bias roller 605 and the secondary transfer roller 510 between the pair of sandwiching the intermediate transfer belt 501, the copy sheet 601 and the secondary transfer belt, the secondary transfer power source 802 controlled by the constant current applying a predetermined transfer bias currents. 另外,设有没有图示的接离机构,其驱动支承辊602及二次转印偏压辊605,使得上述二次转印带601及二次转印偏压辊605具有相对上述二次转印对向辊510压接的位置和离开的位置。 Further, a contact and separation mechanism (not shown) which drives the support roller 602 and the secondary transfer bias roller 605, so that the secondary transfer belt 601 and the secondary transfer bias roller 605 relative to the secondary transfer the position of the printing roller 510 and a position pressed away. 处于上述离开位置的二次转印带601在图1中用双点划线表示。 The secondary transfer belt 601 is in a position away from above is shown in FIG. 1 by a two-dot chain line.

在上述二次转印带601的朝着定影辊卷绕在支承辊603的部分对向配置着作为转印材消电装置的复印纸消电充电器606及作为转印材载体消电装置的带消电充电器607。 In the secondary transfer belt 601 is wound toward the fixing roller pair disposed to a discharging charger 606 copy sheet as a transfer material and charge removing means as a transfer material carrier charge elimination means eliminating a portion of the belt support rollers 603 battery charger 607. 另外,二次转印带601的卷绕在图中下侧的支承辊604上的部分与作为转印材载体清洁装置的清洁刮片608相接。 Further, the secondary transfer belt 601 is wound on the lower portion side of the support roller 604 as a transfer material of the carrier cleaning means in contact with the cleaning blade 608 in FIG.

上述复印纸消电充电器606通过对复印纸上电荷消电使复印纸能以复印纸本身的强度与二次转印带601良好地分离。 Erasing the above-described paper copy of the copy sheet by the charger 606 charges the copy sheet so that charge elimination can be well separated to the copy paper itself and the intensity of the secondary transfer belt 601. 上述带消电充电器607能对在二次转印偏压辊605被赋与的残留在二次转印带601上的电荷进行消电。 The belt charger 607 capable of erasing charge elimination bias to the secondary transfer roller 605 is endowed with the residual charge on the secondary transfer belt 601. 上述清洁刮片608除去附着在二次转印带601表面的附着物进行清洁处理。 The cleaning blade 608 in the cleaning process to remove the deposit adhering the secondary transfer belt 601 surface.

在上述结构的彩色复印机中,图像形成周期一开始,通过没有图示的驱动马达,感光体鼓100朝如箭头所示的反时针方向回转,通过驱动辊,中间转印带501朝如箭头所示的顺时针方向回转。 In the color copying machine of the above-described configuration, the image forming beginning of the cycle, by a drive motor (not shown), the photoreceptor drum 100 rotatable in the counterclockwise as shown by an arrow direction by the drive roller, the intermediate transfer belt 501 toward the arrow clockwise rotation shown. 随着中间转印带501的回转,形成Bk墨像、C墨像、M墨像、Y墨像,按Bk、C、M、Y顺序叠合在中间转印带501上最终形成墨像。 With the rotation of the intermediate transfer belt 501, Bk toner image is formed, C toner image, toner images M, Y toner image, by Bk, C, M, Y toner images sequentially formed on the final laminated on the intermediate transfer belt 501.

上述Bk墨像形成按如下方式进行,带电充电器200通过电晕放电使感光体鼓100均一带负电到所定电位。 The above-described Bk ink image formation is performed as follows, by corona discharge charger 200 charging the photosensitive drum 100 are negatively charged area to a predetermined potential. 通过写入光学组件,根据Bk彩色图像信号进行光栅曝光时,当初均一带电的感光体鼓100的被曝光的部分的电荷与曝光光量成比例地消失,形成Bk静电潜像。 When the raster written by the optical exposure assembly according to Bk color image signal, the exposure light amount of electric charge of the exposed portion 100 initially uniformly charged photoreceptor drum is in proportion to disappear, Bk electrostatic latent image is formed. 随后,通过Bk显影辊上的带负电的Bk墨粉与该Bk静电潜像接触,墨粉不附着在感光体鼓100的残留有电荷的部分,Bk墨粉吸附在没有电荷的部分、即被曝光的部分,形成与静电潜像相似的Bk墨像。 Then, negatively charged by the developing roller belt Bk Bk Bk toner into contact with the electrostatic latent image, the residual toner does not adhere to portions of the photoreceptor drum 100 are charged Bk toner holding portion is not in charge, i.e. the exposed portion, forming an electrostatic latent image with Bk toner image is similar. 形成在感光体鼓100上的Bk墨像被转印在与感光体鼓100处于接触状态下等速驱动着的中间转印带501的表面上。 Bk ink is formed on the photoreceptor drum 100 in the image is transferred to the photosensitive drum 100 is in constant contact with the drive surface of the intermediate transfer belt 501. 下面,将从感光体鼓100往中间转印带501的墨像转印称为“带转印”。 Next, the photoreceptor drum 100 from the intermediate transfer belt to transfer the toner image 501 is called "transfer tape."

上述带转印后残留在感光体鼓100表面的若于未转印残留墨粉用上述感光体清洁装置300清扫,以备感光体鼓100的再使用。 With the rear transfer residual surface of the photoreceptor drum 100 by the photosensitive body cleaning device 300 to clean if the untransferred residual toner to prepare for reuse of the photoreceptor drum 100.

在感光体鼓100上,Bk图像形成工序之后,进行C图像形成工序,在所定时间开始读取由彩色扫描器所得到的C图像数据,根据该C图像数据进行激光写入,形成C静电潜像。 On the photosensitive drum 100, after the Bk image forming step, the image forming process C starts reading C image data obtained by the color scanner in a predetermined time, the laser written image data based on the C, forming an electrostatic latent C like. 然后,在前面的Bk静电潜像的后端部通过之后、且C静电潜像的前端部到达之前,进行旋转显影组件的回转动作,C显影器402被设置到显影位置,用C墨粉使C静电潜像显影。 Then, after the rear end of the front portion of the electrostatic latent image through Bk, and the distal portion C of the electrostatic latent image before it reaches, for the turning operation of the rotary developing unit, developing unit C 402 is provided to the developing position, the toner using C C electrostatic latent image. 以后,继续C静电潜像区域的显影,在C静电潜像后端部通过时,与前面的Bk显影器401场合一样,进行旋转显影组件的回转动作,将后面的M显影器403移动到显影位置。 After continued developing the electrostatic latent image area C, when a rear end portion C by the electrostatic latent image, as in the previous case Bk developing device 401, a rotary motion of the rotary developing unit, the M developing unit will be later moved to the developing 403 position. 这个动作在后面的M静电潜像的前端部到达显影位置前结束。 Before the end of the developing position of the end portion in the back of the operation M electrostatic latent image arrives.

在M及Y的图像形成工序中,各自的读取彩色图像数据、形成静电潜像、显影与上述Bk、C工序相同,说明省略。 M and Y image forming step, each of the read color image data, an electrostatic latent image, developing the Bk described above, the same as step C, description thereof will be omitted.

将顺序形成在感光体鼓100上的Bk、C、M、Y的墨像顺序对位在同一面上转印在中间转印带501上。 The Bk are sequentially formed on the photoreceptor drum 100, C, M, Y ink image sequence of bits transferred on the same surface of the intermediate transfer belt 501. 这样,在中间转印带501上形成四色叠合的墨像。 Thus, four color superimposed toner image formed on the intermediate transfer belt 501. 叠合在该中间转印带501上的墨像在PTC502均一带电后,在随后的二次转印工序中一次性地转印在复印纸上。 Superimposed toner image on the intermediate transfer belt 501 after PTC502 uniformly charged, a secondary transfer process in the subsequent one-time transferred onto a paper sheet.

在上述图像形成动作开始时期,从没有图示的复印纸供纸盒或手送纸托盘等的供纸部供纸,在没有图示的一对阻纸辊的接触部待机。 In the image forming operation start time, the copy paper feed cassette (not shown) or the like for hand feed tray paper feed unit, a pair of contact portions (not shown) in a standby paper roll resistance. 然后,在由二次转印对向辊510及二次转印偏压辊形成接触部的二次转印部,当中间转印带501上的墨像的前端到来时,驱动阻纸辊进行复印纸与墨像对合,使复印机前端正好与该墨像前端一致。 Then, at the secondary transfer portion to form a secondary transfer portion in contact with the secondary transfer bias roller 510 and the roller, when the arrival of the front end of the ink image on the intermediate transfer belt 501, a driving roller for resistance copy paper together with the ink image on the toner image exactly coincides with the front end of the front end of the copier. 然后,复印纸与中间转印带501上的墨像叠合,通过二次转印部。 Then, the toner image superimposed on the copy sheet and the intermediate transfer belt 501, the secondary transfer portion. 这时,通过施加在二次转印偏压辊上的转印偏压,中间转印带501上的四色叠合墨像一次性地转印在复印纸上。 In this case, by a transfer bias applied to the secondary transfer bias roller, four color toner images superimposed on the intermediate transfer belt 501 is transferred onto a paper sheet once. 此后,当二次转印带沿着二次转印带移动方向通过配置在二次转印部下流侧的复印纸消电充电器606的对向部时,复印纸被消电,剥离中间转印带501,由没有图示的一对排出辊送向装置本体外,表面朝上地码放在没有图示的复印件托盘中,得到全彩色复印件。 Thereafter, when the secondary transfer belt along a moving direction by the secondary transfer belt disposed downstream of the secondary transfer portion of the copy paper consumption battery charger 606 when the portion of the copying paper is erasing, the intermediate transfer peeling print ribbon 501, a pair of discharge rollers (not shown) is sent to the apparatus of the present in vitro, surface facing upward code on a copy tray (not shown), to obtain a full-color copy.

另一方面,墨像转印在复印纸上之后残留在中间转印带501表面上的墨粉由带清洁刮片504进行清洁,用没有图示的接离机构,该清洁刮片被推压到中间转印带501上。 On the other hand, after the toner image transferred on the copy paper remaining surface of the intermediate transfer belt 501 toner cleaned by the belt cleaning blade 504, by means not shown toward and away from, the cleaning blade is pressed to the intermediate transfer belt 501.

这里,重复复印时,彩色扫描器的动作及往感光体鼓100形成图像是继第一张的第四色(Y)的图像形成工序之后,在所定时间,进行第二张的第一色(Bk)的图像形成工序。 Here, when copying is repeated, and the operation of the color scanner to the photosensitive drum 100 is formed after the first image of the fourth color (Y) image forming step, at a predetermined time, a second sheet of a first color ( Bk) image forming step. 中间转印带501则当第一张的四色叠合墨像往复印纸的一次性转印工序之后,在上述带清洁刮片504已清洁区域表面,进行第二张的Bk墨像的带转印。 Intermediate transfer belt 501 when the four-color ink image to overlap the first step after a single transfer of copy paper, in the belt cleaning blade 504 has a surface cleaning area, the second band-like ink of Bk transfer. 此后,与第一张动作相同。 Thereafter, the same as the first operation.

上面所述是得到四色全彩色复印件的复印模式,但是,三色复印模式、二色复印模式场合,其动作原理与四色模式相同。 The above was a four-color full-color copy of copy mode, however, three-color copy mode, two-color copy mode case, the operation principle which is the same as with the four-color mode. 单色复印模式场合,所定张数结束前,仅使旋转显影组件400的所定色的显影器设为显影动作状态,在将带清洁刮片504推压在中间转印带501上状态下连续进行复印动作。 Monochrome copying mode where, before the end of a predetermined number of sheets, only the rotation of the developing assembly of the developing fixer 400 to the developing operation state, the belt cleaning blade 504 is pressed against the intermediate transfer belt 501 in a state continuously copying operation.

下面,对使上述二次转印后的中间转印带501消电的带消电充电器503的控制进行说明。 Next, the control of the intermediate transfer belt 501 so that the power consumption of the secondary transfer charger 503 after the charge elimination band will be described.

图4是作为控制上述带消电充电器503的消电条件的控制装置的控制部900等构成的控制系统的方框图。 FIG 4 is a control system including a control unit 900 and the like of the control device controlling the consumption of electrical condition of the charger 503 charge elimination with a block diagram. 在图4中,控制部900由CPU901、ROM902、RAM903、I/O接口904等构成、驱动马达508a、消电用电源804及标记传感器905等连接在I/O接口904上,驱动马达508a与中间转印带501的带驱动辊508相连接,标记传感器905用于检测设在中间转印带501内周面的回转置检测用记号(没有图示)。 In FIG. 4, the control unit 900 consists of CPU901, ROM902, RAM903, I / O interface 904 and the like, the drive motor 508a, erasing power source 804 and the mark sensor 905 and the like connected to the I / O interface 904, the drive motor 508a and with the intermediate transfer belt drive roller 508,501 is connected, a sensor 905 for detecting a mark provided on the intermediate transfer belt 501 opposing the inner circumferential surface of the rotation detection mark (not shown).

作为上述消电用电源804,使用能将包括直流成分和交流成分的电压施加在带消电充电器503上的装置。 Power dissipation means on the belt charger 503 as the erasing voltage power source 804, can include the use of a DC component and an AC component is applied. 为了切换该带消电充电器503的消电条件,可以使施加电压的直流成分及交流成分中至少一个变化,但在本实施例中,从容易控制观点考虑,在上述控制部900切换直流成分大小。 In order to eliminate the switching condition of the electric charge elimination with charger 503, the DC component and allows the AC component of the applied voltage of at least a change, but in the present embodiment, from the viewpoint of easy control, switching DC component of the control unit 900 size.

另外,将电压施加在上述带消电充电器503上的消电用电源804的接通/断开时间根据上述标记传感器905的输出信号进行设定。 Further, an electrical voltage is applied on said band elimination charge elimination by the charger 503 is set on / off time of the power supply 804 in accordance with output signal of the mark sensor 905.

图5是在中间转印带501上叠合四色墨像的全彩色复印动作二次连续进行时显示中间转印带501的表面电位的变化及带消电充电器503的接通/断开时间一例的时间图。 FIG 5 is superposed on the intermediate transfer belt 501 shows the change of the surface potential of the intermediate transfer belt 501 and the charger 503 is turned on with power dissipation during full-color copying operation of the four-color toner image is secondary continuous / OFF timing chart showing an example of the time. 图中上侧的图线是在图1的PTC对向位置用电位传感器测定的中间转印带501的表面电位,符号①、②、③、④分别表示第一色、第二色、第三色及第四色的一次转印部分的表面电位。 FIG upper line in FIG. 1 to FIG PTC intermediate position potentiometer measured the surface potential of the transfer belt sensor 501, the symbols ①, ②, ③, ④ denote the first color, second color, the first primary transfer portion of the surface potential and the fourth three-color color. 从图5可以明白,每进行一次转印,从一次转印偏压辊507将正电荷赋与中间转印带501的背面,中间转印带501的感光体鼓侧的表面电位朝负极性方向变大。 As apparent from FIG. 5, each of the primary transfer, a primary transfer bias roller 507 from the positive charge-imparting back surface 501 of the intermediate transfer toward the negative direction of tape, the surface potential of the photosensitive drum side of the intermediate transfer belt 501 of the body larger. 尤其如本实施例那样,当使用电阻比较高的中间转印带501时,暂被赋与的电荷易保持在中间转印带501上,上述表面电位上升很显著。 In particular, as in this embodiment, when a relatively high resistance of the intermediate transfer belt 501, temporarily assigned to the charge easily held on the intermediate transfer belt 501, of the surface potential increases very significantly. 这样,每进行一次转印,中间转印带501的表面电位往负极性方向变大,所以,与一次转印次数、即中间转印带501上的墨像叠合次数有关,中间转印带501的表面电位发生离散。 Thus, once for each transfer, the surface potential of the intermediate transfer belt 501 to the negative direction becomes large, so that the number of primary transfer, the toner image that is related to frequency and superimposed on the intermediate transfer belt 501, an intermediate transfer belt 501 discrete surface potential occurs.

更具体地说,如图5c所示,从一次转印偏压辊507输出的电压V可以控制为随墨像转印次数而增加。 More specifically, as shown in FIG 5c, the output from the primary transfer bias roller 507 can be controlled with the voltage V of the ink increases as the number of transfers. 根据本发明的具体实施例,当第一墨像例如Bk墨像从感光体鼓100转印到中间转印带501上时,通过电源801的控制,一次转印偏压辊507的转印偏压输出可以是1000V,然后,在彩色图像形成中的下一墨像例如C墨像从感光体鼓100被转印到中间转印带501上时,从一次转印偏压辊507输出的转印偏压可以增加到1500V;以后,对于M、Y墨像,从一次转印偏压辊507输出的转印偏压可分别增加到2000V、2500V。 According to a particular embodiment of the present invention, when the first toner image, for example, the Bk ink image is transferred from the photosensitive drum 100 onto the intermediate transfer belt 501, by controlling the power supply 801, a primary transfer bias roller transfer bias 507 output voltage can be 1000V, and then, the next toner image in the color image formation, for example, the C ink image from the photosensitive drum 100 is transferred onto the intermediate transfer belt 501, the output from the primary transfer bias roller 507 revolutions bias may increase to 1500V printing; later, for M, Y toner image, a primary transfer bias from a transfer bias roller 507 output may be respectively increased to 2000V, 2500V. 由此可见,在本发明的上述工序中,从一次转印偏压辊507输出的转印偏压可根据从感光体鼓100转印到中间转印带501的墨像顺序号而增加。 Thus, in the process of the present invention, the primary transfer bias from a transfer bias roller 507 output may be increased as the ink ribbon 501 in accordance with the sequence transferred from the photosensitive drum 100 to the intermediate transfer member.

因此,在本实施例中,通过上述控制部900,根据中间转印带501的表面电位,切换带消电充电器503所产生的消电条件,以便能均一消电。 Accordingly, in the present embodiment, by the control unit 900, the surface potential of the intermediate transfer belt 501, the erasing condition switching battery charger 503 with arc generated in order to uniformly charge elimination. 具体地说,根据往中间转印带501的墨像叠合次数,控制切换上述消电用电源803的输出电压的直流成分大小。 Specifically, according to the number of superimposed intermediate toner image transfer belt 501, a discharging control switch the DC component of the output voltage of the power supply 803 size. 墨像叠合次数多时,通过使上述直流成分变大,提高消电能力进行消电。 Number of superimposed toner image is large, by making the DC component becomes large, the ability to increase the erasing power consumption. 墨像叠合次数少时,通过使上述直流成分变小,降低消电能力进行消电,不使中间转印带501带上逆极性的电荷。 Number of superimposed toner image is small, by making the DC component becomes smaller, the ability to reduce the power consumption charge elimination, the intermediate transfer belt 501 does not take charge of reverse polarity.

另外,使用厚纸作为复印纸时,实行厚纸模式,控制带驱动辊508的驱动马达508a,将中间转印带501的移动速度切换为普通纸场合的大致二分之一。 Further, when thick paper is used as copy paper, the implementation of the thick paper mode, controls the belt driving roller 508 driving motor 508a, the moving speed of the intermediate 501 approximately one-half of the paper transfer belt is switched to the normal occasions. 这样,中间转印带501的移动速度变慢,容易通过带消电充电器503进行消电。 Thus, the moving speed of the intermediate transfer belt 501 becomes slow, easily erasing by band elimination battery charger 503. 因此,在本实施例中,实行厚纸模式使中间转印带501的移动速度变慢时,通过使施加的电压直流成分调整成比普通纸场合小,降低消电能力进行消电,不使中间转印带501带上逆极性的电荷。 Accordingly, in the present embodiment, the implementation of the thick paper mode, the moving speed of the intermediate belt transfer 501 becomes slow, by applying a voltage of the DC component is adjusted to be smaller than the case of plain paper, reducing the ability to eliminate the electric power consumption, without belt 501 charges of opposite polarities intermediate transfer belt.

上面,若根据本实施例,即使是往中间转印带501的转印次数不同从而引起带消电前的中间转印带501表面电位离散场合,也可根据其转印次数,切换施加在带电消电充电器503上的电压(直流成分)的大小,所以能对中间转印带501均一消电。 Above, when the embodiment according to the present embodiment, even if the number is transferred to the intermediate transfer belt 501 to cause different pre intermediate transfer belt 501 with a surface charge elimination potential discrete case, the transfer may be based on their frequency, switching the charging applied magnitude of the voltage (DC component) of the erasing charger 503, 501 so that a uniform electric energy dissipation intermediate transfer belt. 当实行厚纸模式切换中间转印带501的移动速度,因该移动速度不同,消电前的中间转印带501的表面电位发生离散,对于这种场合,根据本发明的上述实施例,也能对中间转印带501进行均一消电。 When the moving speed of the implementation of the thick paper mode is switched to the intermediate transfer belt 501, the movement speed varies, the charge elimination before the intermediate transfer belt 501 surface potential occurrence of variation, for this case, according to the embodiment of the present invention, also uniformly charge elimination can be performed on the intermediate transfer belt 501. 这样,能通过上述均一消电,以便用于后面的从感光体鼓100转印墨像。 Thus, by the above-described homogeneous charge elimination, for later transfer to the ink image from the photosensitive drum 100.

在上述实施例中,有时会因中间转印带501与赋与电荷动作中的二次转印电荷赋与装置是否对向而发生中间转印带501的表面电位离散。 In the above embodiment, the secondary transfer because the charge sometimes imparting means 501 and the intermediate transfer belt forming operation of the charge occurs whether the surface potential of the intermediate transfer belt 501 discrete. 在这种场合,最好根据中间转印带501与动作中的二次转印电荷赋与装置是否对向,切换施加在带消电充电器503上的电压(直流成分)的大小,使中间转印体均一消电。 In this case, it is preferable if the voltage applied to the band elimination battery charger 503 (a DC component) of the switching means and the second transfer charge forming the intermediate transfer belt 501 in accordance with operation of the size of the intermediate homogenization transfer charge elimination.

尤其如图1那样不使用较高电阻的二次转印带601,施加有正极性偏压的中电阻的二次转印偏压辊和二次转印对向辊之间之间直接挟持复印纸场合,中间转印带501上的图像部、即与施加有所定转印偏压的二次转印偏压辊对向部分的表面电位的绝对值比非图像部低,容易发生表面电位离散。 In particular, FIG. 1 is not used as a high resistance of the secondary transfer belt 601, a secondary transfer bias applied to the secondary transfer roller and the resistance of the positive polarity bias voltage to copy directly sandwiched between the roller paper case, the image on the intermediate transfer belt unit 501, i.e. the non-image portion of the lower absolute value than the surface potential of the portion of the applied transfer bias has given a secondary transfer bias roller, the surface potential of the dispersion easily occurs . 这时,根据与施加有转印偏压的二次转印偏压辊对向的是图像部还是非图像部,切换施加在带消电充电器503上的电压(直流成分)的大小。 At this time, the magnitude of the voltage on the charger 503 with charge elimination (DC component) in accordance with the application roller is applied with a secondary transfer bias to the transfer bias is on the image or non-image portion, the switching. 例如,对与施加有转印偏压的二次转印偏压辊对向的图像部消电时,将施加在带消电充电器503上的电压的直流成分大小切换为比非图像部小。 For example, when the image erasing unit for applying a secondary transfer bias to a transfer bias roller, applying a DC component with a magnitude of the voltage at the charge removing charger 503 is switched to the non-image portion is smaller than the . 切换的时间可以根据上述标记传感器905的输出信号而定。 The switching time may be determined according to the output signal of the mark sensor 905.

下面,说明涉及上述实施例的彩色复印机的更具体的实施数据。 Next, a more specific embodiment of the data pertaining to the above-described embodiments of the color copying machine.

使用厚0.15mm、宽368mm及内周长565mm的中间转印带作为上述中间转印带501,该中间转印带的移动速度设定为200mm/sec。 Thick 0.15mm, width of 368mm and 565mm inner perimeter of the intermediate transfer belt as the intermediate transfer belt 501, the moving speed of the intermediate transfer belt was set to 200mm / sec.

上述中间转印带501的表层501a形成厚1μm程度的绝缘层,上述中间层501b形成由PVDF(聚偏二氟乙烯)构成的厚75μm程度的绝缘层(体积电阻率约1013Ωm),上述基层501c形成由PVDF(聚偏二氟乙烯)及氧化钛构成的厚75μm程度的中电阻层(体积电阻率108-1011Ωcm)。 The surface 501 of the intermediate transfer belt 501a formed 1μm thick insulating layer level, the intermediate layer 501b is formed 75μm thick insulating layer level (volume resistivity of about 1013Ωm) of PVDF (polyvinylidene fluoride) configuration, said base layer 501c formed of PVDF and titanium oxide in a thickness of 75μm degree of resistance layer (volume resistivity 108-1011Ωcm) (polyvinylidene fluoride). 测定这种材质所形成的中间转印带整体的体积电阻率为107-1012Ωcm。 Overall volume resistivity of the intermediate transfer belt formed of such a material is measured 107-1012Ωcm. 上述各体积电阻率是用JISK6911(日本工业标准K6911)中记载的测定方法施加电压100v保持10秒钟测定的。 Voltage is applied to each of the volume resistivity is measured by the method described in 100v (Japanese Industrial Standard K6911) measured in JISK6911 held for 10 seconds. 另外,用油化电子制的电阻测定器“HighRester IP”测定上述中间转印带501的表层501a侧的表面电阻率为107-1012Ω/□。 Further, electronic system oil resistance measuring "HighRester IP" measurement of the surface resistivity of the intermediate transfer belt 501 of the side surface 501a 107-1012Ω / □. 该表面电阻率除了用上述电阻测定器进行测定,也可以用JISK6911中记载的表面电阻测定法测定。 The surface resistivity was measured by the above except that a resistance measuring instrument, the surface resistivity may be measured using the assay described in JISK6911.

使用镀镍金属辊作为一次转印偏压辊507,使用金属辊作为带消电辊512,使用金属辊或导电性树脂辊作为其他辊。 Nickel-plated metal roll as the primary transfer bias roller 507, used as a metal roll with a discharging roller 512, a metal roll or a conductive resin roller as another roller. 在一次转印偏压辊507上施加适当大小的直流转印偏压,例如对第一色墨像施加1.0kv,对第二色墨像施加1.3-1.4kv,对第三色墨像施加1.6-1.8kv,对第四色墨像施加1.9-2.2kv。 DC transfer bias is applied on an appropriately sized primary transfer bias roller 507, for example, 1.0kv is applied to the first color ink image, the second color ink is applied to the 1.3-1.4kv image, the third color ink is applied as 1.6 pairs -1.8kv, a fourth color ink is applied 1.9-2.2kv image.

上述一次转印部的接触宽Wn设定为10mm,上述接触部的从带移动方向下流端到带消电刷513的相接位置的距离L设定为7mm(参照图3)。 Contact with the primary transfer portion of the width Wn is set to 10mm, with the contact portion of the moving direction from the downstream end 513 of the brush from contact with extinction position L is set to 7mm (see FIG. 3). 使用植设含碳树脂纤维的导电性件作为上述带消电刷513。 Implanting a conductive member containing carbon fibers as the resin tape eliminate brushes 513.

使用带栅电极的充电器作为上述PTC502,通过PTC用电源803对该PTC502施加与中间转印带501上的墨像的带电极性相同的直流偏压。 With charger using the gate electrode as the PTC502, applied to the charged polarity of the toner image on the intermediate transfer belt 501 by the same DC bias voltage power supply 803 to the PTC PTC502. 更具体地说,对PTC502的主电线502a施加定电流控制为-500μA的直流电压,对栅电极502b施加设定在0--3kv范围内的直流电压。 More particularly, the main wires 502a is applied to the constant current control PTC502 DC voltage -500μA applying a DC voltage within a set range 0--3kv gate electrode 502b.

施加在带消电充电器503上的电压的直流成分设定为如下表1所示,交流成分的波峰间电压设定为6KVp-p,频率数为500HZ。 Charge elimination is applied to the belt charger 503 is set to a voltage of a DC component shown in the following Table 1, among the peaks of the AC component voltage is set to 6KVp-p, the number of frequency of 500HZ.

表1 Table 1

使用包括表面层和芯层的辊作为上述二次转印偏压辊605,上述表面层由导电性海棉或导电性橡胶构成,上述芯层由金属或导电性树脂构成,将定电流控制为10-20μA的转印偏压施加在该辊上。 Comprising a surface layer and the core layer using a roll as the secondary transfer bias roller 605, the surface layer of an electrically conductive sponge or conductive rubber, the core layer of a metal or a conductive resin, the constant current control is 10-20μA transfer bias is applied to the roller. 使用PVDF(聚偏二氟乙烯)形成的厚度100μm、体积电阻率1013Ωcm的带材作为上述二次转印带601。 Using PVDF (polyvinylidene fluoride) formed in a thickness of 100μm, a volume resistivity of the strip 1013Ωcm as the secondary transfer belt 601.

使用通过没有图示的电源仅施加AC电压或AC+DC电压的放电器作为上述复印纸消电充电器606,使用通过没有图示的电源仅施加AC电压或AC+DC电压的放电器作为上述带消电充电器607。 Applying an AC voltage or use AC + DC voltage power source (not shown) by electrical discharge only as the copy paper consumption battery charger 606, using only applied AC voltage or AC + DC voltage power source (not shown) by electrical discharge, as described above with elimination battery charger 607. 上述清洁刮片608相对由支承辊604架设部分的二次转印带601以逆角度方向相接。 The cleaning blade 608 relative to the secondary transfer belt 601 by the contact support rollers 604 of the erected part in reverse angular direction.

在上述实施例中,以使用感光体鼓100作为像载体为例进行了说明,但是,本发明也能适用于使用其他形状的像载体,例如也能使用于张设在二辊之间、无端移动的感光体带。 In the above embodiment, the photoreceptor drum 100 to use as an image carrier has been described as an example, but the present invention is also applicable to other shapes using the image carrier, for example, it can be stretched between the two rollers, endless moving the photoreceptor belt.

在上述实施例中,以使用中间转印带501作为中间转印体为例进行了说明,但是,本发明也能适用于使用其他形状的中间转印体。 In the above embodiment, the intermediate transfer belt 501 using an example has been described as an intermediate transfer body, however, the present invention is also applicable to other shapes of the intermediate transfer body. 另外,上述中间转印带501的电气特性(体积电阻率、表面电阻率)、厚度、结构(单层、二层、......)、材料、材质等可以根据成像条件等进行各种选择,采用合适的中间转印带。 Further, the electrical characteristics of the intermediate transfer 501 (volume resistivity, surface resistivity) with a thickness, structure (single, two, ......), materials, and other materials may be in accordance with the respective imaging conditions, etc. choices, using the appropriate intermediate transfer belt.

在上述实施例中,以使用消电刷作为上述一次转印部的接触部中的一次转印部消电装置为例进行了说明,但是,本发明也能适用于使用刮片、辊等其他形状部件作为上述一次转印部消电装置。 In the above embodiments, to eliminate the use of a brush as a contact portion of the primary transfer portion of the primary transfer unit charge elimination apparatus has been described as an example, but the present invention is also applicable to the use of a doctor blade, rollers and other as the shape of the primary transfer member unit charge elimination apparatus. 另外,用上述消电装置消电的位置并不限定为上述实施例中所图示的位置,也可以沿中间转印带移动方向在一次转印偏压辊507上的上流侧位于一次转印部的接触部内。 Further, with the position of the erasing charge elimination apparatus is not limited to the position illustrated in the above embodiments, the tape may be moving direction of the intermediate transfer upstream side of the primary transfer bias on the primary transfer roller 507 is located the contact portion of the inner portion. 上述转印部的接触部内的消电位置并不限定为一处,也可以在若干处消电。 Decharging position in the contact portion of the transfer portion is not limited to one, it may be at a plurality of erasing. 在本实施例中是将消电刷接地,但是,在不对上述接触部必要的转印电荷产生影响的范围内,也可以施加与转印电荷的极性相反的偏压。 In the present embodiment, it is the elimination brush ground, however, in the range of the contact portion does not need to transfer charge impact, may be biased with a polarity opposite to the transfer charge.

在上述实施例中,以使用一次转印偏压辊作为一次转印电荷赋与装置为例进行了说明,但是,本发明也能使用于采用其他形状的一次转印电荷赋与装置。 In the above embodiment, the primary transfer bias roller to use as a primary transfer charge-imparting device described as an example, however, the present invention also enables the primary transfer charge-imparting device for other shapes. 另外,沿中间转印带移动方向,上述消电刷等一次转印部消电装置的消电位置的下流侧,也可以在上述一次转印部的接触部内赋与一次转印电荷。 Further, a position downstream side of the charge removing brush like the primary transfer portion cancellation charge elimination device, may be assigned the primary inner contact portion and the primary transfer along the charge transfer portion of the intermediate transfer belt in the moving direction.

在上述实施例中,施加在上述一次转印偏压辊507等的一次转印电荷赋与装置上的一次转印偏压的电压、电流等值并不局限于上述实施例中记载,可以根据各种成像条件设定合适的值。 In the above embodiment, applied to the primary transfer charge-imparting device of the primary transfer bias roller 507 and the like of the primary transfer bias voltage, the current contour is not limited to the embodiments described, can various imaging condition setting appropriate values.

在上述实施例中,以使用带消电辊512作为一次转印前消电装置为例进行了说明,但是,本发明也可使用刮片、刷等其他形状部件以代替该辊。 In the above embodiment, the tape using a discharging roller 512 as a first pre-transfer charge removing means has been described as an example, but the present invention may also use a blade, brush-shaped member instead of the other roller.

在上述实施例中,以使用二次转印偏压辊作为二次转印电荷赋与装置为例进行了说明,但是,本发明也可使用刮片、刷等其他形状部件以代替该辊。 In the embodiment described above, using the secondary transfer bias to the secondary transfer roller as a charge imparting device described as an example, but the present invention may also use a blade, brush-shaped member instead of the other roller.

在上述实施例中,在二次转印部使用二次转印带601作为载置转印材的转印材载体,但是,本发明也可使用筒等其他形状部件以代替该带。 In the above embodiment, a secondary transfer belt 601 as a transfer material carrier placing the transfer material in the secondary transfer unit, however, the present invention may also use other shapes and other members in place of the tape cartridge.

在上述实施例中,对感光体鼓100带负电,使用双成分系显影剂、采用反转显影方式的显影器进行了说明,但是,本发明并不局限于上述感光体鼓100的带电电位,而且,对于使用单成分系显影剂、采用正规显影方式的显影器也同样适用。 In the above embodiment, the photoreceptor drum 100 is negatively charged, using a two-component developer, a developing device using the reversal development mode has been described, but the present invention is not limited to the charging potential of the photosensitive drum 100, Further, using a single-component developer, a developing method using a regular developer is also applicable.

下面说明本发明第二实施例,与第一实施例相同部分说明从略。 Next, a second embodiment of the present invention, the same parts as the first embodiment description is omitted.

如图6所示,在中间转印带501的周围,对向配置着作为转印前带电装置的预转印充电器502、作为纸转印组件600的转印材载体的二次转印带601、作为二次转印电荷赋与装置的二次转印偏压辊605、兼用作中间转印体消电装置和中间转印体清洁装置的作为导电性刷部件的刷辊514、作为润滑剂涂布装置的润滑剂涂布刷505等。 6, around the intermediate transfer belt 501, is disposed on the pre-transfer charger as a pre-transfer charging device 502, a secondary transfer sheet transfer support assembly 600 with the transfer paper 601 , as the secondary transfer bias of the secondary transfer roller 605 charge-imparting means, also serves as an electrically conductive brush elimination member brush roller means intermediate transfer body and an intermediate transfer cleaning device 514, as a lubricant a lubricant coating brush coating device 505 and the like.

上述导电性刷辊514在二次转印后进行中间转印带501的消电及清洁,通过消电用电源804被施加与二次转印后的中间转印带501的表面电位同极性的直流电压。 The conductive brush roller 514 and a discharging cleaning intermediate transfer belt 501 after the secondary transfer, the same polarity is applied to the intermediate transfer belt after the secondary transfer surface 501 of the power supply potential by erasing 804 DC voltage. 为提高消电效率,也可以将交流电压叠合在该直流电压上。 To improve the efficiency of electricity consumption, an AC voltage may be superposed on the DC voltage. 另外,通过没有图示的接离机构,可以将上述导电性刷辊514切换为相对中间转印带501接触或离开。 Further, the contact and separation mechanism (not shown), may be the conductive brush roller 514 relative to switch contacts 501 and away from the intermediate transfer belt.

控制上述刷辊514接下述方式接通或断开。 Controlling the contact brush roller 514 on or off in the following manner. 例如,当形成一张全彩色图像时,二次转印结束后,至少中间转印带501运行一周结束前,使刷辊514接触。 For example, when forming a full color image, the rear end of the secondary transfer, the intermediate transfer at least one week before the end of the belt 501 running, the contact brush roller 514. 当重复形成全彩色图像时,二次转印结束后,后面的墨像前端到达消电清洁位置前,使刷辊514接触。 When the full-color image formation is repeated, the end of the secondary transfer, the toner image reaches behind the front end of the front erasing cleaning position, the contact brush roller 514. 当形成一张单彩色图像时,一次转印结束后,至少中间转印带501运行一周结束前,使刷辊514接触。 When forming a single color image, the primary transfer ends, at least before the end of the intermediate transfer belt 501 runs a circle, the contact brush roller 514. 当重复形成单彩色图像时,一次转印结束后,后面的墨像前端到达消电清洁位置前,使刷辊514接触。 When forming a single color image is repeated, after a completion of transfer, the toner image reaches behind the front end of the front erasing cleaning position, the contact brush roller 514.

在本实施例中,将墨像转印在上述复印纸上后,上述中间转印体501的表面通过刷辊514消电,同时进行清洁,该刷辊514由没有图示的接离机构推压在中间转印带501上。 In the present embodiment, the ink image is transferred after said copy sheet, the surface of the intermediate transfer member 501 while being cleaned by the brush roller 514 erasing, the brush roller 514 by a contact and separation mechanism (not shown) to push pressed against the intermediate transfer belt 501.

重复复印时,彩色扫描器的动作及往感光体鼓100形成图像是继第一张的第四色(Y)的图像形成工序之后,在所定时间进行第二张的第一色(Bk)的图像形成工序。 When copying is repeated, and the operation of the color scanner to the photosensitive drum 100 is formed after the first image of the fourth color (Y) image forming step, a first color in a second predetermined time (Bk) of The image forming process. 中间转印工序之后,在上述刷辊514已清洁区域表面进行第二张的Bk墨像的带转印。 After the intermediate transfer process, a second band Bk toner image is transferred in the area of ​​the cleaned surface of the brush roller 514. 此后,与第一张动作相同。 Thereafter, the same as the first operation.

上面所述是得到四色全彩色复印件的复印模式,但是,三色复印模式、二色复印模式场合,其动作原理与四色模式相同。 The above was a four-color full-color copy of copy mode, however, three-color copy mode, two-color copy mode case, the operation principle which is the same as with the four-color mode. 单色复印模式场合,所定张数结束前,仅使旋转显影组件400的所定色的显影器设为显影动作状态,在将刷辊514推压在中间转印带501上状态下连续进行复印动作。 Monochrome copying mode where, before the end of a predetermined number of sheets, only the rotation of the developing assembly of the developing unit 400 fixer developing operation state is set, the continuous copying operation under the brush roller 514 is pressed against the intermediate transfer belt 501 state .

根据本实施例,仅使一个刷辊514接触中间转印带501,能进行中间转印带501的消电及清洁,所以,与分别设置使中间转印带进行消电的装置及清洁装置场合相比,能实现低成本化。 According to the present embodiment, only one of the intermediate transfer belt 514 contacting the brush roller 501, the intermediate transfer belt can be cleaned and electric arc 501, thus, are provided with the intermediate transfer belt charge elimination means and cleaning means where compared to achieve cost reduction.

以往使用电晕放电器作为中间转印体消电装置,尽管在刚消电后中间转印带表面电位为0V前后,但一会儿后消电前极性的电位就会出现,但在本实施例中,若采用将电压施加在刷辊514上进行消电的结构,上述消电前极性的电位不会出现,能得到良好的消电效果。 Corona discharger conventionally used as an intermediate transfer member a discharging means, although the surface potential immediately after the charge elimination before and after the intermediate transfer belt is 0V, but after a while before polarity charge elimination potential occurs, the present embodiment , when a voltage is applied using a discharging structural brush roller 514 in the power consumption does not occur before the polarity of the potential, power consumption can be obtained a good effect.

在本实施例中,使用刷辊514作为进行中间转印带501消电及清洁的导电性刷部件,但是也可以如图7所示,使用包括刷516a的导电性刷部件516,该刷516a沿清洁对向辊511的轴向延伸。 In the present embodiment, a brush roller 514 as the intermediate transfer belt 501 and the charge elimination cleaning conductive brush member, it is also shown in Figure 7, including the use of conductive brush member 516a of the brush 516, the brush 516a in the cleaning of the roller 511 extends axially. 在这种结构场合,最好如图7所示,配设或使金属辊517接触该刷516a,以便更有效地回收附着在刷部件516的刷516a上的墨粉等。 In case this arrangement, best shown in Figure 7, is provided with a metal or a brush 516a contacts the roller 517, in order to more efficiently recovering the toner adhering to the brush 516 of the brush member 516a and the like. 在该金属辊517上施加比部件516高的电压,用静电力将附着在刷部件516的刷516a上的墨粉等吸附到金属辊517的表面上的附着物通过没有图示的刮片等回收。 Applying a voltage higher than member 516 on the metal roller 517, the electrostatic force such as toner adhering to the brush 516 of the brush member 516a adsorbed to deposit on the surface of the metal roller 517 by a blade (not shown), etc. recycling.

在上述实施例中,也可以根据二次转印后的中间转印带501的表面电位切换刷辊514的消电条件,以便能对中间转印带501均一消电。 In the above-described embodiments, the belt surface may be the intermediate potential 501 of the second transfer charge elimination transfer condition switching brush roller 514, 501 in order to uniformly charge elimination with the intermediate transfer. 例如,根据往中间转印带501的墨像叠合次数,切换上述消电用电源804的输出电压的直流成分的大小。 For example, according to the number of superimposed toner image of the intermediate transfer belt 501, a discharging switch the magnitude component of the output voltage of the DC power source 804.

在本实施例的具体实例中,一刷辊514代替第一实施例的具体实例中的带消电充电器503及带清洁刮片504,其他条件与第一实施例的具体实例相同,将导电性刷纤维植设在金属制轴体上,作为对二次转印后的中间转印带501进行消电及清洁的刷辊514。 In a specific example of the present embodiment, instead of a brush roller 514 with a first charge removing charger 503 in the specific example embodiment and the belt cleaning blade 504, the same as the specific examples of other conditions of the first embodiment, the conductive brush fibers implanted on the metal shaft, as the intermediate transfer belt after the secondary transfer 501 and charge elimination brush cleaning roller 514. 施加与消电前的中间转印带501的表面电位相反极性的直流电压(正电压),通过使用施加该所定电压的导电性的刷辊514,即使象本实施例那样,使用包括高电阻的中间层501b的多层结构的中间转印带501场合,也不会发生已消电的电荷再次出现在表面上的现象,能良好地进行二次转印后的中间转印带501的消电。 Is applied to the intermediate transfer belt before the erasing surface potential of the opposite polarity DC voltage 501 (positive voltage), the conductive brush roller is applied to a predetermined voltage by using a 514, even if, as in this embodiment, including the use of a high-resistance elimination of the intermediate 501 after intermediate layer of the multilayer structure of the intermediate transfer belt 501b of the case 501, the electric charge has disappeared reappears on the surface of the phenomenon does not occur, it can be favorably secondary transfer belt transfer Electricity.

下面说明本发明的第三实施例,涉及本实施例的彩色复印机主要部分的图像形成部的概略构成图请参照图1。 Next, a third embodiment of the present invention, a schematic configuration view of an image forming section of a main part of a color copying machine according to the present embodiment Referring to FIG.

下面对于作为转印前带电装置的PTC502进行说明。 For PTC502 below as the pre-transfer charging device will be described.

从感光体鼓100已转印的中间转印带501上的墨像有时由于包含半色调部及全色调部、或包含墨粉叠合量不同部分,带电量呈离散状态。 From the photosensitive drum 100 is transferred to the intermediate transfer belt 501 due to the ink may contain a halftone image portion and a full-color portions, or containing different amounts of toner overlap portion with the form of discrete charge state. 另外,还存在因沿中间转印带移动方向邻接上述一次转印部的下流侧的空隙所发生的剥离放电,在一次转印后的中间转印带501上的墨像内发生带电量离散的现象。 Further, there is also adjacent to a moving direction of peeling discharge gap due to the primary transfer portion of the downstream side along the intermediate transfer belt occur, the primary intermediate transfer belt after transfer of the toner image on the charge occurs in a discrete band 501 phenomenon. 这种同一墨像内带电量离散会使二次转印部的转印容限降低。 Discrete will transfer charge amount of the secondary transfer portion tolerance reduce this ink inside the same image.

因此,在本实施例中,通过使在PTC502往复印纸转印前的墨像均一带电,解决同一墨像内带电量离散问题,提高二次转印的转印容限。 Accordingly, in the present embodiment, by making the ink image to the copy sheet PTC502 uniformly charged before transfer, to solve the problem of discrete charge amount within the same toner image, transfer of the secondary transfer improve tolerance.

如上所述,根据本实施例,通过使已从感光体鼓100转印的中间转印带501上的墨像均一带电,即使该中间转印带501上的墨像内带电是离散,也能使中间转印带501上的墨像各部的转印特性大致一定。 As described above, according to the present embodiment, the intermediate transfer 100 from the photoreceptor drum by the transfer belt 501 as an ink uniformly charged, even though the intermediate transfer belt charging the ink image on a discrete 501, it can be the intermediate transfer belt 501 as an ink transfer properties of each part is substantially constant. 因此,能抑制往复印纸转印时的转印容限低下,稳定地转印该墨像。 Thus, the transfer margin can be suppressed low when the copy sheet to the transfer, the transferred toner image stably.

在上述实施例中,在PTC502被带电的带电量根据作为带电对象的中间转印带501的移动速度而变化。 In the embodiment described above, vary with the charged amount PTC502 the moving speed of the object 501 as an intermediate transfer belt charging. 例如,中间转印带501的移动速度慢的话,中间转印带501上的墨像的同一部分通过PTC502的带电区域时间变长,带电量就变多。 For example, the moving speed of the intermediate transfer belt 501 is slow, the toner image on the intermediate transfer belt 501 by the charging area becomes longer with time PTC502 part, on the charge amount increases. 与此相反,若中间转印带501的移动速度快,中间转印带501上的墨像带电量变少。 On the contrary, if the moving speed of the intermediate transfer belt 501 is faster, less charged toner image on the intermediate transfer belt 501 is decreased. 因此,中间转印带501上的墨像通过PTC502的带电位置途中,当中间转印带501的移动速度变化时,最好根据移动速度控制PTC,使得墨像带电量在途中不变化。 Thus, the toner image on the intermediate transfer belt 501 by the charging of the middle position PTC502, when the moving speed of the intermediate transfer belt 501 changes, the moving speed is preferably controlled PTC, such as with an ink amount does not change in the middle.

上述实施例在彩色图像形成装置中,当复印纸使用厚纸时,通过选择实行厚纸模式,在尽可能不降低复印速度(每分钟复印张数条件下,在图像形成动作途中切换装置整体的动作速度,以使往复印纸的二次转印及此后的定影良好地进行。具体地说,感光体鼓100上的墨像后端被转印在中间转印带501上之后,且中间转印带501上的墨像前端到达二次转印部之前,将中间转印带501的移动速度切换为1/2程度。若实行这样的厚纸模式,中间转印带501上的墨像通过PTC502的带电位置途中,中间转印带501上的移动速度变化。因此,最好根据中间转印带501的移动速度控制PTC,以使得墨像带电量在途中不变化。 Means, when the copy paper thick paper, thick paper mode by selecting the implementation of the above-described embodiment, a color image is formed, the number of copies per minute under the conditions as much as possible without reducing the copying speed (switching device is in the middle of the entire image forming operation operation speed, so that the secondary transfer performed favorably to the copy sheet and thereafter fixing. in particular, the rear end of the toner image on the photosensitive drum 100 is transferred onto the intermediate transfer belt 501 after the transfer and the intermediate the toner image on the front end of the print ribbon 501 before it reaches the secondary transfer portion, the moving speed of the intermediate transfer belt 501 is shifted to the 1/2 degree. when the thick paper mode to implement this, the toner image on the intermediate transfer belt 501 PTC502 way charging position, the change in the moving speed of the intermediate transfer belt 501. Thus, the moving speed is preferably controlled PTC intermediate transfer belt 501, so that the charge amount of the ink image is not changed in the middle.

图8是作为根据上述中间转印带501的移动速度控制PTC502的栅压的控制装置以控制部900等构成的控制系统的方框图。 FIG 8 is a control means controlling the gate voltage PTC502 moving speed of the intermediate transfer belt 501 according to the control system including a block diagram of control unit 900 and the like. 在图8中,控制部900由CPU901、ROM902、RAM903、I/O接口904等构成,驱动马达508a、PTC用电源803及标记传感器905等连接在I/O接口904上,驱动马达508a与中间转印带501的带驱动辊508相连接,标记传感器905用于检测设在中间转印带501内周面的回转位置检测用记号(没有图示)。 In FIG. 8, the control unit 900 consists of CPU901, ROM902, RAM903, I / O interface 904 and the like, the drive motor 508a, the PTC power supply 803 and the mark sensor 905 and the like connected to the I / O interface 904, the drive motor 508a of the intermediate transfer tape drive roller 508,501 is connected, provided the mark sensor 905 for detecting the rotational position of the intermediate transfer belt 501 weeks inner surface of the detection mark (not shown).

图9表示上述厚纸模式时中间转印带用的驱动马达及PTC的栅压控制的时间图,在图中符号A表示的时间开始复印动作,中间转印带501上的墨像前端到达PTC502的带电位置前(符号B),开始由PTC502所实行的带电。 9 shows a time chart of the driving motor when said thick-paper mode and the intermediate transfer belt with PTC gate voltage control, the copying operation starts at a time indicated by reference numeral A, the front end of the toner image on the intermediate transfer belt 501 reaches PTC502 before the charging position (symbol B), starting from the charging PTC502 practiced. 根据上述标记传感器905检测中间转印带上标记的结果,判断使否感光体鼓100上的墨像前端到达二次转印部之前的时间(符号C)。 According to the above-described intermediate transfer belt mark sensor 905 detects the flag result, NO is determined that the toner image photoreceptor drum 100 on the distal end before the arrival time of the secondary transfer portion (symbol C). 在该时间,控制带驱动马达508a将中间转印带501的移动速度控制到大约为1/2。 In this time, the control belt drive motor 508a moving speed of the intermediate transfer belt 501 is controlled to about 1/2. 与此同时,控制PTC用电源803,使施加在PTC502的栅极502b上的栅压大致为1/2,降低带电能力。 At the same time, controlling PTC power supply 803, the gate voltage applied to the gate 502b PTC502 of substantially 1/2, to reduce the charging capability. 这样,在PTC502被带电的中间转印带501上的墨像带电量随着中间转印带移动速度的降低而不会变化。 Thus, in the middle of the charged toner image PTC502 charge amount decreases as the moving speed of the intermediate transfer belt 501 without a change in the transfer belt. 中间转印带501上的墨像后端通过PTC502的带电位置时(符号D),停止往PTC502施加偏压。 The rear end of the toner image on the intermediate transfer belt 501 by the charged position PTC502 (symbol D), is stopped to PTC502 biased.

如上所述,实行上述厚纸模式等时,在PTC502使中间转印带501上的墨像带电途中,即使中间转印带移动速度变化,也能使该中间转印带501上的墨像整体均一带电,能确实防止转印容限的低下。 As described above, when implementing the above thick paper mode or the like, in the way PTC502 ink image on the charged intermediate transfer belt 501, even when the moving speed of the intermediate transfer belt changes, also make the whole ink image on the intermediate transfer belt 501 uniformly charged, a transfer can be reliably prevented low tolerance.

Claims (11)

  1. 1.一种图像形成装置,包括:载置从像载体转印的墨像的中间转印体;将用于从像载体往中间转印体转印墨像的电荷赋与该中间转印体的一次转印电荷赋与装置;中间转印体消电装置,将消电电荷赋与中间转印体,以对已将墨像转印在转印材上的上述中间转印体的表面进行消电;其特征在于:上述消电电荷的电压与中间转印体的表面电位成正比。 An image forming apparatus, comprising: a mounting member from the image carrier onto the intermediate transfer of toner image; for from the charge image carrier to the intermediate transfer member transferring the ink image to the intermediate transfer body and forming first transfer charge-imparting means; intermediate transfer member erasing means erasing the charge-imparting intermediate transfer body to extinguish of the ink image surface has the intermediate transfer member is transferred onto the transfer material power; characterized in that: a voltage proportional to the surface potential of the intermediate transfer body the electrical charge dissipation.
  2. 2.根据权利要求1中所述的图像形成装置,其特征在于:将已形成在上述像载体上的墨像若干次叠合转印在上述中间转印体上;根据上述往中间转印体的墨像转印次数,切换上述中间转印体消电装置所得到的消电电荷的电压。 2. the image forming apparatus according to claim 1, wherein: the several superimposed toner image formed on the image carrier is transferred on said intermediate transfer body; according to the above-described intermediate transfer body transferring the toner image frequency switching voltage of the erasing member electrically charges the intermediate transfer charge elimination device obtained in the above.
  3. 3.根据权利要求1中所述的图像形成装置,其特征在于,根据上述往中间转印体的墨像转印次数,切换由上述一次转印电荷赋与装置所赋与的电荷的电压。 The image in the forming apparatus according to claim 1, characterized in that, based on the number of the intermediate transfer body to transfer toner image, the switching voltage by the primary transfer charge-imparting means imparting charge.
  4. 4.根据权利要求1中所述的图像形成装置,其特征在于:设有将用于从上述中间转印体往转印材转印墨像的电荷赋与上述转印材体载体的二次转印电荷赋与装置;根据在充电操作期间上述往中间转印体是否面对上述二次转印电荷赋与装置切换从上述中间转印体消电装置所得到的消电电荷的电压。 4. The image forming apparatus according to claim 1, wherein: the secondary transfer is provided for the transfer charge-imparting material carrier to a transfer member transferring the ink material from said intermediate image transfer body charge-imparting means; according to the above-described intermediate transfer body facing whether the voltage of the secondary transfer charge-imparting means for switching electric charge elimination from the intermediate transfer member a discharging means is obtained during the charging operation.
  5. 5.根据权利要求1中所述的图像形成装置,其特征在于:设有移动速度控制装置,根据转印材的厚度,切换中间转印体的移动速度;根据上述中间转印体的移动速度切换从上述中间转印体消电装置所得到的消电电荷的电压。 The image according to claim 1. The forming apparatus, comprising: a moving speed control means is provided, according to the thickness of the transfer material, the switching of the moving speed of the intermediate transfer body; switched in accordance with the moving speed of the intermediate transfer body charge removing means from the intermediate transfer member electrostatic charge dissipation of the obtained voltage.
  6. 6.根据权利要求1-5中任一项所述的图像形成装置,其特征在于:使用电晕消电器作为上述中间转印体消电装置,施加包括直流成分和交流成分的电压;上述消电电荷改变施加在上述电晕消电器上的直流成分大小。 The image claimed in any one of the claims forming apparatus, wherein: a corona discharger as the intermediate transfer member erasing means applies a voltage comprising AC component and a DC component; and the elimination changing the size of direct current component electrostatic charge applied to said corona discharger is.
  7. 7.根据权利要求1中所述的图像形成装置,其特征在于,中间转印体是一至少具有第一和第二层的带。 The image in the forming apparatus according to claim 1, wherein the intermediate transfer member having at least a first and a second belt layer.
  8. 8.根据权利要求1中所述的图像形成装置,其特征在于,设有:导电性刷部件,该刷部件与将墨像转印在上述转印材上后的上述中间转印体相接触,进行中间转印体的消电以及清洁;电源,该电源将与中间转印体的表面电位相反极性的偏压施加在上述导电性刷部件上。 8. The image forming apparatus according to claim 1, characterized in that a: the conductive brush member, with the brush member in contact with the ink image is transferred on the intermediate transfer member after said transfer member, an intermediate transfer body cleaning and charge elimination; power supply which will be applied to the conductive brush member and the surface potential of a polarity opposite to the bias of the intermediate transfer body.
  9. 9.根据权利要求8中所述的图像形成装置,其特征在于,使用可回转的导电性刷辊作为上述导电性刷部件。 The image of claim 8 forming apparatus according to claim, characterized in that a conductive brush roller rotatably as the conductive brush member.
  10. 10.根据权利要求1中所述的图像形成装置,其特征在于,设有预转印带电装置,使转印到上述转印材前的上述中间转印体上的墨像带电。 The image in the forming apparatus according to claim 1, characterized in that a pre-transfer charging device, so that the charged toner image transferred to the intermediate transfer member on the transfer material before.
  11. 11.根据权利要求10中所述的图像形成装置,其特征在于,设有控制装置,该控制装置根据通过上述预转印带电装置的带电位置的中间转印体的表面移动速度,控制上述预转印带电装置的输出。 The image in the forming apparatus according to claim 10, characterized in that a control means, the control means in accordance with the surface movement speed of the intermediate transfer body charging position of the pre-transfer charging device, the pre-control output transfer charging device.
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US7142803B2 (en) 2003-12-19 2006-11-28 Ricoh Printing Systems, Ltd. Fixing device and image forming apparatus
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US5732310A (en) * 1995-04-21 1998-03-24 Canon Kabushiki Kaisha Image forming apparatus having cleaning device for cleaning intermediate transfer member
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