JP2005121726A - End processing device for image carrier transfer body and image forming apparatus using the device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an end processing device for an image carrier transfer body, by which a resin swelling from the peripheral end of the surface of the transfer body can easily be removed, and to provide an image forming apparatus using the end processing device. <P>SOLUTION: The end processing device comprises: a holding board 105 which holds the image carrier transfer body 20 conveyed from a fixing device 50, 50A, 200, and has many through-holes 105a along a peripheral area where at least the peripheral end 20e of the image carrier transfer body 20 is located; a suction means 109 for sucking the image carrier transfer body 20 onto the holding board 105 by sucking air via the through-holes 105a; a jet nozzle 101 which jets compressed air 102 to the peripheral end 20e of the image carrier transfer body 20. A resin 22 extruding from the the peripheral end 20e of the image carrier transfer body 20 conveyed onto the holding board 105 from the fixing device 50, 50A, 200 is separated and removed from the image carrier transfer body 20 by the suction means 109 and the jet nozzle 101. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an image forming apparatus such as a copying machine, a printer, or a facsimile that forms an image on a transfer body using powder toner by an image forming method such as an electrophotographic method or an electrostatic recording method. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an end processing apparatus for an image-carrying transfer body that performs processing on the end of a transfer body that has been manufactured, and an image forming apparatus using the end processing apparatus. The present invention relates to an edge processing apparatus for an image-carrying transfer body in which a transparent resin is preliminarily coated over the entire surface, or the transparent resin is coated when an unfixed toner image is fixed, and an image forming apparatus using the same. .

Japanese Patent Laid-Open No. 04-278967 Japanese Patent Laid-Open No. 04-362960 JP 09-200551 A JP-A-10-213942 JP-A-63-92964 JP 63-92965 A JP 2002-91051 A JP 2002-341619 A

  Conventionally, when a color image forming apparatus that forms a color image by an electrophotographic method or an electrostatic recording method is used, for example, when an image is produced by the above-described electrophotographic method using a silver salt photograph as a document, The toner adhesion amount is increased or decreased according to the density of the photographic document. Therefore, the toner adhesion amount increases and the glossiness increases in the portion where the document density is high, and conversely the toner adhesion amount decreases and the glossiness decreases in the portion where the document density is low. Is proportional to the image density of the color original. As a result, an image surface having a glossiness different from that of a silver salt photographic paper photograph used as an original is generated.

  Therefore, in order to solve such problems, the toner heating temperature at the time of fixing is increased to lower the toner melt viscosity at the time of fixing, or the pressure at the time of fixing is increased to increase the image. The surface is smoothed.

  As another method, there is disclosed a method for improving smoothness and glossiness of an image surface by transferring and fixing a transparent toner on a transfer body in addition to a color toner (for example, Patent Document 1). To 4).

  However, even when fixing is performed by such a method, the toner melts too much and the transfer member (for example, non-coated paper) penetrates, and the glossiness of the surface of the image formed on the transfer member is uniform. It may not be the case.

  Therefore, in order to solve the problem caused by the soaking of the toner, so-called coated paper in which white particles are coated on the surface of high-quality paper or medium-quality paper is used as a transfer body, or a resin layer is coated on the surface. It has been proposed to use a processed transfer body (hereinafter referred to as “resin-coated paper”) (see, for example, Patent Documents 5 and 6).

  However, in the case of producing an image using this coated paper or resin-coated paper, since the toner does not permeate, the above-mentioned problem that the glossiness of the image surface is not uniform does not occur. Since the entire surface is coated, the transparent resin protrudes in the range of about 50 to 500 μm from the peripheral edge of the surface of the transfer member due to the heat and pressure of the fixing device.

  Since the protruding resin is as thin as several tens of μm, it can be easily dropped off by film contact with the transfer path of the transfer body or bundling multiple images with human hands. In other words, it has a problem that the conveyance path and the work place are soiled, and further, it adheres to the image front surface and the back surface and is soiled.

  As a technique that can solve such a problem, a sheet in which the shape of the peripheral edge of the transfer sheet is further processed, as further disclosed in Patent Document 5, has been proposed. Since it is necessary to perform special processing on the peripheral edge portion, when commercially available paper is used, the effect of preventing the transparent resin from protruding still cannot be obtained.

  In addition, in order to solve such problems, transfer the surface of the transfer body to which the powder toner is transferred so that it is inside the peripheral edge of the transfer body in anticipation of the protruding amount of resin after fixing. Although it is conceivable to transfer the image by making it smaller than the area of the body, in this case, considering the accuracy of the apparatus for producing the image, the dimensional accuracy of the paper, and the amount of change in the paper size when the temperature and humidity change, There was a problem that it was difficult to realize.

  Further, as a means for making the glossiness of the image formed on the transfer body uniform, a belt type transparent resin layer transfer fixing device is used, and the unfixed color toner formed on the transfer body on the fixing belt. A method of transferring and fixing a transparent resin layer heated and melted on an image has also been proposed (see, for example, Patent Document 8).

  However, in the case of transferring and fixing a transparent resin layer heated and melted on the entire surface of a transfer body on which an unfixed color toner image is formed on this fixing belt, the image is the same as in the case of using coated paper or resin-coated paper. In consideration of the accuracy of the apparatus for manufacturing the paper, the dimensional accuracy of the paper, and the amount of change in the paper size when the temperature and humidity change, it is difficult to form and transfer and fix a transparent resin layer having the same dimensions as the transfer body. Therefore, the transparent resin layer must be transferred and fixed in a dimension area longer than the length and width of the transfer body by several mm or more. As a result, the transferred and fixed transparent resin layer protrudes from the transfer body. In the resulting image, the transparent resin protrudes with a width of several mm or more from the peripheral edge of the surface of the transfer body.

  For this reason, coated paper or resin-coated paper is used even when the heated and melted transparent resin layer is transferred and fixed onto the unfixed color toner image formed on the transfer body on the fixing belt described above. As in the case of the image transfer, there is a problem due to the resin protruding from the peripheral edge of the surface of the image transfer body.

  In view of the above-described problems of the prior art, the present invention is an image that can easily remove the resin protruding from the peripheral edge of the surface of the transfer body in an image produced by an electrophotographic method or the like. It is an object of the present invention to provide an end processing apparatus for a carrier transfer member and an image forming apparatus using the end processing apparatus.

  In order to achieve the above-mentioned object, the edge processing apparatus for an image bearing transfer member of the present invention is mounted on an image forming apparatus that forms an image having excellent gloss using a transparent resin, and the fixing device of this image forming apparatus For the image-carrying transfer body that has been fixed in step and the fixing toner image is carried on the transfer body, the protruding resin that protrudes outside beyond the peripheral edge of the image-carrying transfer body is separated from the image-carrying transfer body. An image bearing transfer member end processing apparatus to be removed, which holds the image bearing transfer member transferred from the fixing device, and has a large number along at least a peripheral region where a peripheral edge of the image bearing transfer member is located. A holding plate having a through-hole, and a suction means disposed on the back side of the holding plate and sucking the image-carrying transfer member onto the holding plate by sucking air through the through-hole, Against holding plate The image-carrying transfer body, which is disposed on the opposite side of the suction means and has an ejection nozzle that ejects compressed air to the peripheral edge of the image-carrying transfer body, and is transferred from the fixing device onto the holding plate The protruding resin present at the peripheral edge of the image is separated and removed from the image bearing transfer member by the suction means and the ejection nozzle.

  In the image bearing transfer member end processing apparatus of the present invention configured as described above, the holding plate having a plurality of through holes along at least the peripheral region where the peripheral edge of the image bearing transfer member is located, An image transported from the fixing device onto the holding plate, comprising suction means for adsorbing the image carrying transfer member onto the holding plate through the hole and an injection nozzle for jetting compressed air to the peripheral edge of the image holding transfer member. The protruding resin present at the peripheral edge of the carrying transfer body is removed by separating it from the image carrying transfer body by the suction means and the jet nozzle, so that the resin protruding from the end of the transferring body is surely removed to prevent contamination. In addition, it is possible to eliminate the subsequent cutting process of the edge of the formed image.

  Here, the holding plate may have a large number of through holes corresponding to the peripheral region where the peripheral edge portions of the transfer bodies of a plurality of sizes used in the image forming apparatus are located.

  In this case, it is possible to provide a holding plate capable of suction fixing and discharging corresponding to a transfer body (A4, A3 plate, etc.) having a predetermined size.

  In addition, the holding plate is a roll formed on the surface side of the cylindrical body longer than the width or length of the image-carrying transfer member held on the surface of the holding plate, and having an elastic layer on the surface. A press member is provided, and the image-carrying transfer member held on the holding plate is transferred under pressure to separate the protruding resin existing at the peripheral edge of the image-carrying transfer member from the image-carrying transfer member. May be.

  In this case, a roll press member that is formed of a cylindrical body longer than the width or length of the image carrying transfer body and has an elastic layer on the surface is disposed on the surface side of the holding plate. Since the roll press member is transferred onto the image carrying transfer body under pressure and the protruding resin is separated from the image carrying transfer body, the elastic body formed on the surface of the roll press member protrudes from the peripheral edge of the transfer body. Since the resin is pressed and removed and the surface of the image is not damaged, it is possible to remove the protruding resin more effectively and efficiently in combination with the compressed air injected from the injection nozzle. .

  Further, the spray nozzle is a spot spray nozzle that sprays compressed air in a spot shape within a predetermined size range, and a moving means is provided so that the entire circumference can be moved along the peripheral edge of the image carrying transfer body. You may have.

  In this case, the spray nozzle is a spot spray nozzle that sprays compressed air in a spot shape within a range of a predetermined size, and the moving means is capable of moving the entire circumference along the peripheral edge of the image bearing transfer body. Therefore, it is possible to reduce the number of nozzles, thereby realizing more efficient peripheral edge processing.

  The ejection nozzle is a slit ejection nozzle that blows compressed air in a slit shape longer than the width or length of the image-carrying transfer body held on the surface of the holding plate, and one of the image-carrying transfer bodies You may provide a moving means so that it can move toward the peripheral edge part of the other side which opposes from the peripheral edge part of this edge | side.

  In this case, the ejection nozzle is a slit ejection nozzle that blows compressed air in a slit shape longer than the width or length of the image-carrying transfer body, and is opposed to the peripheral edge of one side of the image-carrying transfer body. Since the moving means is provided so as to move toward the peripheral edge of the other side, it is possible to reduce the number of nozzles and to provide an injection nozzle suitable for use in combination with a roll press member. it can.

  Further, the spray nozzle may move after the roll press member to be transferred following the roll press member.

  In this case, since the spray nozzle moves following the roll press member to be transferred, removal of the protruding resin can be carried out synergistically and efficiently.

  The image carrier transfer member edge processing apparatus of the present invention holds the image carrier transfer member transferred from the fixing device, and at least along the peripheral region where the peripheral edge of the image carrier transfer member is located. A holding plate having a through hole; a suction means disposed on the back side of the holding plate and sucking the image-carrying transfer member onto the holding plate by sucking air through the through hole; and the holding It is formed of a cylindrical body that is longer than the width or length of the image-carrying transfer member held on the surface of the plate, and has an elastic layer on the surface, and is disposed on the surface side of the holding plate. A roll press member that transfers under pressure the image carrying transfer member transferred onto the holding plate, and is present at the peripheral edge of the image carrying transfer member transferred from the fixing device onto the holding plate. Extruded resin and the suction means By the Rupuresu member is separated from the image bearing transfer body and removing it.

  In the image bearing transfer member end processing apparatus of the present invention configured as described above, the holding plate having a plurality of through holes along at least the peripheral region where the peripheral edge of the image bearing transfer member is located, A suction means for adsorbing the image-carrying transfer body onto the holding plate through the hole, and a cylindrical body longer than the width or length of the image-carrying transfer body, and having an elastic layer on the surface, the image A roll press member that transfers under pressure on the carrying transfer body, and the protruding resin existing at the peripheral edge of the image carrying transfer body is separated and removed from the image carrying transfer body by the suction means and the roll press member. Therefore, it is possible to reduce the number of components and contribute to cost reduction.

  The holding plate has a plurality of suction chambers formed in accordance with the size of the transfer body on the back side thereof, and suction paths connecting the suction chambers to the suction means. A switching means for switching the connection between each suction chamber and the suction means may be provided.

  In this case, a plurality of suction chambers divided according to the size of the transfer body are formed on the holding plate, and each suction chamber and suction are connected to the suction path connecting between each suction chamber and the suction means. Since the switching means for switching the connection with the means is provided, the suction means can be used efficiently by switching the suction path according to the size of the transfer body.

  In the image forming apparatus of the present invention, the above-described edge processing apparatus, an image forming unit that forms an unfixed toner image on the transfer body based on the image information, and an undetermined image formed by the image forming unit. And a fixing unit for fixing the received toner image.

  In the image forming apparatus of the present invention configured as described above, the above-described transfer member end processing device, an image forming unit for forming an unfixed toner image on the transfer member based on image information, and the image forming unit And fixing means for fixing the unfixed toner image formed by the means, so that the resin protruding from the end of the transfer member is surely removed to prevent the stain and to cut the formed image in the subsequent stage. Therefore, it is possible to provide an image forming apparatus that is environmentally friendly.

  According to the present invention, in an image produced by an electrophotographic method or the like, an edge processing apparatus for an image-carrying transfer body capable of easily removing the resin protruding from the surface of the transfer body, and an image forming apparatus using the same Can be provided.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, an outline of an image forming apparatus to which the present invention is applied will be described with reference to FIG. FIG. 1 is a functional configuration diagram illustrating an outline of an image forming unit of an image forming apparatus according to an embodiment of the present invention.

  As shown in FIG. 1, the image forming unit of the color image forming apparatus 1 is roughly divided into a document reading device 2 that reads an image of a color document, a color image read by the document reading device 2, and a personal computer (not shown). And an image output device 3 for outputting an image based on image data sent from the network. As will be described later, the color image forming apparatus 1 further includes a fixing device that performs a fixing process in a state where gloss is imparted to the transfer body on which the color image output from the image output device 3 is formed, and the fixed image. And an end portion processing device for processing the peripheral end portion of the transfer body.

  The image output device 3 further develops the ROS 9 as an image exposure unit, the photosensitive drum 10 as an image carrier on which an electrostatic latent image is formed, and the electrostatic latent image formed on the photosensitive drum 10. The rotary developing device 11 is a developing unit that can form a plurality of toner images of different colors.

  Here, in the color image forming apparatus 1 according to the present embodiment, a color image is formed on the base material of the transfer body, and further, from the transparent toner on the base material of the transfer body on which the color image is formed. The toner image is transferred and fixed on the entire surface of the transfer body to form a glossy color image.

  Next, the above-described components of the image forming apparatus 1 will be described.

  The document reading device 2 illuminates a document 5 placed on a platen glass (not shown) with an illumination lamp 6, and reflects a reflected light image from the document with a color scanner 7 with a predetermined dot density (for example, 16 dots / mm). ). The reflected light image of the document read by the document reading device 2 is, for example, the image processing device 8 as document reflectance data of three colors of red (R), green (G), and blue (B) (each 8 bits). In this image processing apparatus 8, the color separation is performed into three color image signals of yellow (Y), magenta (M), and cyan (C) (each 8 bits), and the difference in toner development amount between adjacent pixels After image detection, the image signal is subjected to predetermined image processing such as shading correction, position shift correction, brightness / color space conversion, gamma correction, frame deletion, color / moving editing, etc., and one color for each color. In order, they are output to ROS 9.

  The ROS 9 modulates the laser diode 12 in accordance with the image data. The laser diode 12 emits a laser beam LB modulated in accordance with the image data. The laser beam LB is further emitted by a rotating polygon mirror (not shown). The beam is deflected and scanned, and scanned and exposed on a photosensitive drum 10 as an image carrier through an optical system including an f · θ lens and a reflection mirror.

  The photosensitive drum 10 is rotationally driven at a predetermined speed in the direction of the arrow by a driving unit (not shown). The surface of the photosensitive drum 10 is charged in advance with a predetermined polarity (for example, a negative polarity) and a potential by a corotron charger 13 for primary charging, and then yellow (Y) and magenta (M ) And laser light LB corresponding to each color of Sian (C) are sequentially scanned and exposed to form an electrostatic latent image. The electrostatic latent image formed on the photosensitive drum 10 is developed by a rotary developing device 11 including three color developing devices 11Y, 11M, and 11C of yellow (Y), magenta (M), and cyan (C). For example, the toner image T is reversely developed with toner charged to a negative polarity that is the same as the charged polarity of the photosensitive drum 10, and a toner image T of a predetermined color is obtained. The toner image T formed on the photosensitive drum 10 is charged with a predetermined polarity by a pre-transfer charger (not shown) as necessary, and the amount of charge is adjusted. In this way, the above-described yellow (Y), magenta (M), and cyan (C) toner images are sequentially formed on the photosensitive drum 10.

  In the present embodiment, the rotary developing device 11 further includes a transparent toner developing device 11T that contains transparent toner. For example, the transparent toner is transferred over the entire surface of the transfer body onto which the color toner image is transferred. The transparent toner image is formed by the same process as the color toner image. The rotary developing device 11 may further include a black (K) developing device (a total of five developing devices).

  Then, the toner images of the respective colors sequentially formed on the photosensitive drum 10 as described above are transferred onto the transfer sheet 14 which is carried on the surface of the transfer drum 14 serving as a transfer body carrying member disposed below the photosensitive drum 10. The images are transferred onto the transfer body 20 such as the like by the transfer corotron 15 while being superimposed on each other. The order of the toner images transferred onto the transfer body 20 carried on the transfer drum 14 is such that the color toner images such as yellow (Y), magenta (M), and cyan (C) are transferred first, and the transparent toner image is transferred. Is transferred to the uppermost layer, that is, the uppermost layer, and the transparent toner image is formed so as to cover the entire surface of the transfer body 20. In this embodiment, the transfer drum 14 is used as a transfer member carrier, but an intermediate transfer member such as an intermediate transfer belt or an intermediate transfer drum may be used.

  The transfer body 20 on which the color toner image such as yellow (Y), magenta (M), and cyan (C) is transferred as the uppermost layer with the transparent toner image as the uppermost layer as described above is separated from the transfer drum 14 and will be described later. The toner image is fixed on the transfer body 20 (electrophotographic transfer paper).

  Next, toner used in the developing device 11 of the image forming apparatus 1 according to the present invention will be described below.

  First, the transparent toner according to the present invention is configured to contain at least a thermoplastic binder resin. Here, “transparent toner” means toner particles that do not contain color materials (color pigments, colored dyes, black carbon particles, black magnetic powder, etc.) for the purpose of coloring by light absorption or light scattering. . Further, this transparent toner is usually colorless and transparent, but the transparency may be slightly lower depending on the type and amount of the fluidizing agent and the release agent contained therein, but substantially, It is colorless and transparent.

  The binder resin may be substantially transparent and can be appropriately selected depending on the purpose. For example, polyester resin, polystyrene resin, polyacrylic resin, other vinyl resins, polycarbonate resin Examples thereof include known resins used for general toners such as resins, polyamide resins, polyimide resins, epoxy resins, polyurea resins, and copolymers thereof. Among these, polyester resins are preferable because they can satisfy toner characteristics such as low-temperature fixability, fixing strength, and storage stability at the same time. The binder resin preferably has a weight average molecular weight of 5000 or more and 40000 or less and a glass transition point of 55 ° C. or more and less than 75 ° C. in order to increase the fixing speed and lower the fixing temperature.

  Note that it is desirable to control the fluidity and chargeability of the toner in order to obtain a high gloss level evenly using such a transparent toner. From the viewpoint of controlling the fluidity and chargeability of the transparent toner, it is preferable that inorganic fine particles and / or organic fine particles are externally added or adhered to the toner surface of the transparent toner.

  The inorganic fine particles are not particularly limited as long as they do not impair the effects of the present invention, and can be appropriately selected from known fine particles used as external additives according to the purpose. , Titanium dioxide, tin oxide, molybdenum oxide and the like. Further, in consideration of stability such as charging property, those obtained by subjecting these inorganic fine particles to a hydrophobic treatment using a silane coupling agent, a titanium coupling agent or the like can also be used.

  The organic fine particles are not particularly limited as long as the effects of the present invention are not impaired, and can be appropriately selected from known fine particles used as external additives according to the purpose. Resin, polystyrene resin, polyacrylic resin, vinyl resin, polycarbonate resin, polyamide resin, polyimide resin, epoxy resin, polyurea resin, fluorine resin, and the like.

  When the average particle size of the above-mentioned inorganic fine particles and organic fine particles is less than 0.005 μm, aggregation occurs when inorganic fine particles and / or organic fine particles are adhered to the surface of the transparent toner, and a desired effect is obtained. On the other hand, when the thickness exceeds 1 μm, it becomes difficult to obtain a higher gloss image. Therefore, the average particle size is particularly preferably 0.005 to 1 μm.

  The particle size of the transparent toner is not particularly limited, but may be about 15 μm, for example. Furthermore, such a transparent toner is used after being combined with an appropriately selected carrier known per se to be a developer. Furthermore, as a one-component developer, a unit that is triboelectrically charged with a developing sleeve or a charging member to form a charged toner and develops it according to the electrostatic latent image can be applied.

  Next, examples of the color toner include insulative particles containing at least a binder resin and a colorant, and include cyan toner, magenta toner, and yellow toner. The composition, average particle size, and the like of the color toner are appropriately selected within the scope of the present invention.

  Examples of the binder resin include those exemplified as the binder resin in the transparent toner described above, and the colorant is not particularly limited as long as it is a colorant usually used for toner, and is known per se. The cyan pigment or dye, magenta pigment or dye, yellow pigment or dye, black pigment or dye can be appropriately selected. In order to enhance the effect of obtaining high gloss, it is important to suppress irregular reflection at the interface between the pigment of the colorant and the binder. For example, a combination with a colorant in which a pigment having a small particle diameter is highly dispersed is preferable.

  The particle size of the color toner is not particularly limited, but is preferably 4 μm or more and 8 μm or less considering that it has a function capable of faithfully reproducing the electrostatic latent image by the exposure device.

In the present invention, the color toner is used after being appropriately combined with a carrier known per se and used as a developer, and the color toner may be appropriately prepared or commercially available. May be. Further, as a one-component developer, a charged toner may be formed by frictional charging with a developing sleeve or a charging member, and development may be performed according to the electrostatic latent image.
<Fixing device>

  Next, a fixing device according to the present invention will be described with reference to the drawings.

  First, a belt-type fixing device which is a first embodiment of a fixing device applicable to the present invention will be described with reference to FIGS.

  As shown in FIG. 2, the belt-type fixing device 50 includes a heating roll 61, a fixing belt 64 rotatably supported by a plurality of rolls 62 and 63 including the heating roll 61, and fixing to the heating roll 61. And a pressure roll 65 disposed so as to be in pressure contact with the belt 64.

  As the heating roll 61, for example, as shown in FIG. 3, an elastic body layer 67 made of silicon rubber or the like having a rubber hardness of 20 to 60 ° is formed on the surface of a metal core 66 made of aluminum, stainless steel or the like with a thickness 1. A coating having a predetermined outer diameter (for example, 50 mm) is used by covering approximately 3 mm and further covering the surface of the elastic layer 67 with a release layer 68 made of a PFA tube or the like. Inside the heating roll 61, a 300 to 350 W halogen lamp 69 is disposed as a heating source, and the inside temperature of the heating roll 61 is set to a predetermined temperature (about 130 ° C. to 195 ° C.). Is heated from.

  Moreover, as the pressure roll 65, what was comprised similarly to the above-mentioned heating roll 61 is used, and the rubber hardness is 20-60 degrees silicon rubber etc. on the surface of the metal core 66 which consists of aluminum, stainless steel, etc. The elastic body layer 67 is coated to a thickness of about 1 to 3 mm, and the surface of the elastic body layer 67 is further coated with a release layer 68 made of a PFA tube or the like to form a predetermined outer diameter (for example, 50 mm). Is used. Inside the pressure roll 65, a 300 to 350 W halogen lamp 69 is disposed as a heating source so that the surface temperature of the pressure roll 65 becomes a predetermined temperature (about 80 ° C. to 180 ° C.). Heated from inside.

  The heating roll 61 and the pressure roll 65 are configured to come into pressure contact with each other with a load of 75 kg to 200 kg by a pressure unit (not shown) via the fixing belt 64.

  The fixing belt 64 is rotatably supported by a plurality of rolls including a heating roll 61, a peeling roll 62, and a walk control roll 63, and is heated by a heating roll 61 that is rotationally driven by a driving source (not shown). It is rotationally driven at a predetermined moving speed (30 to 100 mm / sec). As the fixing belt 64, for example, an endless film made of polyimide having a thickness of 80 μm and a silicon rubber layer having a thickness of 50 μm is used.

  Further, on the inner surface side of the fixing belt 64, a cooling heat sink 70 for forcibly cooling the fixing belt 64 is disposed between the heating roll 61 and the peeling roll 62. Thus, a cooling / sheet conveying unit for cooling the transfer sheet 20 and conveying the sheet 20 is configured. The fixing belt 64 is cooled to about 50 ° C. to 80 ° C. in the vicinity of the peeling roll 62. A small-diameter tension roll 71 that applies a certain tension to the fixing belt 64 is disposed between the cooling heat sink 70 and the heating roll 61.

  Next, the operation of such a belt-type fixing device 50 will be described with reference to FIGS.

  In the belt-type fixing device 50, as shown in FIG. 2, the electrophotographic transfer paper 20 on which the color toner image T is transferred and fixed is transferred to the heating roll 61 and the heating roll 61 via a fixing belt 64. The color toner image T is introduced into a pressure contact portion 72 (nip portion) with the pressure roll 65 that is in pressure contact so that the color toner image T is positioned on the heating roll 61 side. The pressure contact portion 72 between the heating roll 61 and the pressure roll 65 is provided. While passing, the color toner image T is heated and melted and fixed on the electrophotographic transfer paper 20. At that time, when the electrophotographic transfer paper 20 provided with the transparent resin layer 21 (see FIG. 4) as the image receiving layer on the surface of the electrophotographic transfer paper 20 is used, the image receiving layer (transparent) formed on the surface is used. The resin layer 21 is also heated and softened, and is in close contact with the surface of the fixing belt 64.

  Thereafter, the electrophotographic transfer paper 20 on which the color toner image T is fixed on the transfer layer 21 is heated and melted at the press contact portion 72 between the heating roll 61 and the pressure roll 65. The sheet is conveyed together with the fixing belt 64 while keeping in close contact with the surface of the fixing belt 64. In the meantime, the fixing belt 64 is forcibly cooled by the cooling heat sink 70 and the color toner image T and the transfer layer 21 are cooled and solidified, and then peeled off by the waist (rigidity) of the transfer sheet 20 by the peeling roll 62. Is done. The surface of the fixing belt 64 after the peeling process is completed is prepared for the next fixing process by removing residual toner and the like by the cleaner 73.

  Next, a belt-type transparent resin layer transfer fixing device which is a second embodiment of a fixing device applicable to the present invention will be described with reference to FIG.

  The belt-type transfer fixing device 50A transfers the transparent toner onto the fixing belt of the belt-type fixing device 50 in the first embodiment described above, and transfers the transparent toner transferred by the heating roll and the pressure roll onto the transfer body. A transfer fixing function is added, and the configuration is the same as that of the belt-type fixing device in the first embodiment described above except for the portion where the transparent toner layer is formed on the belt. Are denoted by the same reference numerals, and detailed description thereof is omitted. As the transparent toner, the same transparent toner as described above can be used.

  In this belt-type transfer fixing device 50A, the portion where the transparent toner layer 178 is formed on the fixing belt 64 is an application of the image output device 3 of the color image forming device 1 described above, and is developed on the photoreceptor 175. The transferred transparent toner is transferred to the fixing belt 64 by the transfer auxiliary roll 177 with electrostatic force and pressure. The transparent toner layer 178 transferred onto the fixing belt 64 is conveyed to the heating roll 61 by the rotation of the belt 64, and melted on the belt by the heat of the heating roll 61 to become a transparent resin layer 178. This transparent resin layer 178 is formed so as to cover the entire surface of the transfer body 20 over a region several mm or more larger than the four sides of the transfer body (electrophotographic transfer paper) 20.

  Specifically, the color toner image T is positioned on the heating roll 61 side at the pressure contact portion 72 (nip portion) between the heating roll 61 and the pressure roll 65 that is pressed against the heating roll 61 via the fixing belt 64. In addition, the transparent resin layer 178 on the fixing belt 64 was formed on the electrophotographic transfer paper 20 while the transfer body 20 was introduced and passed through the pressure contact portion 72 between the heating roll 61 and the pressure roll 65. It is melted and fixed together with the color toner image T.

  At that time, in order to transfer the transparent resin layer 178 to the entire surface of the transfer paper 20 on which the color toner image T is formed, the timing for aligning the transparent resin layer 178 and the transfer paper 20 to the nip portion 72 is adjusted.

  Thereafter, the surface of the transparent resin layer 178 is fixed to the electrophotographic transfer paper 20 on which the heat-melted transparent resin layer 178 and the color toner image T are fixed at the press contact portion 72 between the heating roll 61 and the pressure roll 65. The sheet is conveyed together with the fixing belt 64 in a state of being in close contact with the surface of the belt 64. During this time, the fixing belt 64 is forcibly cooled by the cooling heat sink 70, and after the transparent resin layer 178 and the color toner image T are cooled and solidified, the transfer sheet 20 itself is elastic (rigid) by the peeling roll 62. It is peeled off. The surface of the fixing belt 64 after the peeling process is completed is prepared for the next fixing process by removing residual toner and the like by the cleaner 73.

  Next, a roll type fixing device which is a third embodiment of a fixing device that can be similarly applied to the present invention will be described with reference to FIG.

  As shown in FIG. 6, the roll-type fixing device 200 includes a heating roll 201 and a pressure roll 202 that constitute the main part.

  The heating roll 201 includes a substrate roll 204 formed of an aluminum core material having an outer diameter of 43 mm and having a 500 W Colts lamp 203 inside, and a silicone compound (SH841U, manufactured by Toray Industries, Inc.) 100 weight provided thereon. Part is formed by filling 100 parts by weight of crystalline silica and 0.8 part of a vulcanizing agent (RC-4 manufactured by Toray Industries, Inc.), and its thermal conductivity λ is 0.0017 cal / cm · sec. Deg, an inner elastic body 205 having a rubber hardness of 60 ° in JIS hardness and an approximate thickness t of 3.0 mm, and Viton rubber (manufactured by DuPont: E-60C) provided on the inner elastic body 205 100 parts by weight, 2 parts by weight of carbon (manufactured by Tokyo Materials Co., Ltd.) and 10 parts by weight of magnesium oxide (MgO: # 30 manufactured by Kyowa Chemical Co., Ltd.) are filled and mixed. The outer elastic body 206 has a conductivity λ of 0.0005 cal / cm · sec · deg and a thickness t of 20 μm.

  On the other hand, the pressure roll 202 includes a substrate roll 207 formed of an aluminum core material having an outer diameter of 49 mm and having a 500 W Colts lamp 218 therein, and a silicone compound (manufactured by Toray Industries, Inc .: SH841U). ) 100 parts by weight, formed by filling and mixing 50 parts by weight of crystalline silica and 0.8 part of a vulcanizing agent (Toray Industries, Inc .: RC-4), with a thermal conductivity λ of 0.0015 cal / An inner elastic body 208 having a cm · sec · deg rubber hardness of 70 ° in JIS hardness and an approximate thickness t of 1.0 mm, and Viton rubber (manufactured by DuPont: E) provided on the inner elastic body 208 -60C) 100 parts by weight, 2 parts by weight of carbon (manufactured by Tokyo Materials Co., Ltd.) and 10 parts by weight of magnesium oxide (MgO: Kyowa Chemical Co., Ltd .: 30) are mixed and formed. The outer elastic body 209 has a thermal conductivity λ of 0.0005 cal / cm · sec · deg and a thickness t of 20 μm.

  The heating roll 201 and the pressure roll 202 are pressed against each other by a pressure mechanism (not shown), a nip width of 6.0 mm is formed at the center, and the surface temperature of the heating roll 201 is 155 ° C. The surface temperature of the pressure roll 202 is set to 150 ° C., and they are rotated at a predetermined surface speed in the directions of arrows. In the figure, reference numeral 213 denotes a release agent supply means for applying the silicone composition 214 to the heating roll 201. Here, 215 is an oil pan, 216 is a supply roll, and 217 is an application roll. The transfer body 20 carrying the toner image T is inserted between the heating roll 201 and the pressure roll 202 to be fixed.

By the fixing device 50 / 50A / 200 as described above, the transfer body (image-carrying transfer body) 20 on which the fixed image has been formed is conveyed to the following end processing apparatus of the transfer body.
<Transfer end processing apparatus>

  Next, a transfer body end processing apparatus according to the present invention will be described with reference to the drawings.

  First, the state of the resin protruding from the transfer body will be described with reference to FIG. FIG. 7A is a schematic view showing the resin protruding from the transfer body, and FIG. 7B is a schematic cross-sectional view thereof. In FIG. 7, reference numeral 20 denotes a transfer body, 21 denotes a transfer image, 22 denotes a resin protruding from the transfer body, 23 denotes a fixing direction, 24 denotes a front end portion, 25 denotes a rear end portion, and 26 denotes a side end portion.

  The resin 22 that protrudes from the transfer body 20 as shown in FIGS. 7A and 7B is made of toner constituting the image or a transparent resin formed on the transfer body, and the amount of protrusion from the transfer body 20 is as follows. Depending on the production method and conditions, the length of the image obtained by transferring and fixing the transparent resin layer heated and melted on the fixing belt to the entire surface of the transfer body onto which the unfixed color toner image has been transferred is generally based on the edge of the transfer body. The thickness is 2 to 20 mm and the thickness is several tens of μm. Further, a color toner and a transparent toner are transferred onto a transfer body, and a fixed image has a length of 50 to 500 μm and a thickness of several tens of μm from the edge of the transfer body as a base point.

  In this way, the resin 22 protruding from the transfer body is very brittle in a normal office temperature and humidity environment, so it easily falls off even with a slight external force, and becomes a film or powder. This causes a problem that the work place is soiled and, further, the work place adheres to the image front and back surfaces and is soiled.

  Accordingly, a first embodiment of the end processing apparatus for separating and removing the resin protruding from the peripheral edge of the transfer body will be described with reference to FIGS. FIG. 8 is a schematic diagram showing the configuration of the main part of the first embodiment of the end processing apparatus according to the present invention, FIG. 9A is a plan view of the holding plate, and FIG. 8B is its AA line. FIG. FIG. 10A is a plan view of each component device when the transfer body is disposed at a predetermined position on the holding plate, and FIG. 10B is a cross-sectional view taken along the line BB.

  As shown in FIG. 8, in the transfer body end processing apparatus 100 according to this embodiment, a transparent resin 21 is coated on the entire surface of a holding plate 105 having a plurality of through holes 105a. The transfer body 20 on which the image is formed is arranged at a predetermined position, and the transfer body 20 is spot-shaped within a predetermined size range so as to face the plurality of through holes 105a of the holding plate 105 through the transfer body 20. A spot injection nozzle 101 for injecting compressed air 102 is provided. The transfer body 20 is sucked and fixed through a plurality of through-holes 105a provided in the holding plate 105 by suction means (not shown), and the resin protrudes from the transfer body 20 beyond the peripheral edge portion 20e of the transfer body 20. No. 22 is dropped by the compressed air 102 jetted from the spot jet nozzle 101, and the resin 22a that has been dropped and separated and removed is removed from the apparatus through a plurality of through holes 105a connected to suction means (not shown). Discharged.

  In the transfer member end processing apparatus 100 configured as described above, the resin 22 protruding from the end 20e of the transfer member 20 is surely removed to prevent contamination, and further, a subsequent formed image cutting process is performed. Can be made unnecessary.

  Details of the constituent members of the above-described transfer member end processing apparatus 100 will be described below.

  As shown in detail in FIGS. 9A and 9B, the holding plate 105 is made of a metal plate such as stainless steel having a plurality of through holes 105 a and has a size larger than that of the transfer body 20. Yes. The plurality of holes 105a correspond to the peripheral area where the peripheral edge portion 20e is located according to the size of the transfer body (for example, A4, A3 plate, etc.) 20 of a plurality of sizes used in the image forming apparatus 1. The holding plate 105 is formed so as to penetrate from the front surface to the back surface in the thickness direction. For example, an exhaust pump, which is a suction means (not shown), is connected to the communication path formed by the plurality of through holes 105a. Further, the larger the number of through holes 105a provided in the holding plate 105, the larger the suction force of an exhaust pump or the like that is a suction means needs to be set. Therefore, the transfer body 20 is sucked and fixed, and the transfer body peripheral edge 20e is used. An appropriate number necessary for sucking and discharging the separated and removed resin 22a is provided along the peripheral region of the peripheral edge 20e of the transfer body.

  Here, the diameter of the through hole 105a formed in the holding plate 105 is preferably 2 mm or more and 10 mm or less. If it is less than 2 mm, the removed resin 22a blocks the through-hole 105a, and the efficiency of suction and discharge becomes poor. If the diameter of the through-hole 105a exceeds 10 mm, the transfer member 20 is sucked when the edge of the transfer member 20 is sucked. This is because there is a risk of deforming. Further, since the resin 22a removed by the compressed air 102 becomes a film piece smaller than the original size due to the pressure of the compressed air 102, the diameter of the through hole 105a is the same as the length of the resin 22 protruding from the transfer body 20. There is no need.

  Further, at the center of the holding plate 105, a transfer roll 106 for moving the transfer member 20 from the left to the right in the drawing along the arrow and transferring the transfer member 20 to a predetermined position of the holding plate 105 is provided. Is provided. The transfer body 20 conveyed by the conveyance roll 106 is arranged at a predetermined position on the holding plate 105 as shown in FIG. 10 and is illustrated through a plurality of through holes 105 a formed in the holding plate 105. The back surface of the transfer body 20 is sucked and held and fixed on the holding plate 105 by the suction device that does not.

  Next, the compressed air 102 is jetted from the spot jet nozzle 101 arranged so as to face the holding plate 105 and having a circular opening toward the peripheral edge portion 20e of the transfer body. The resin layer 22 that protrudes from the portion 20e is detached from the peripheral edge 20e of the transfer body as a base point and separated and removed.

  The resin layer 22a separated and removed in this manner is sucked from a plurality of through holes 105a formed on the holding plate 105 and not holding the transfer body 20, and is discharged out of the end processing apparatus 100 through the plurality of through holes 105a. It is discharged and collected by a collecting means (not shown).

  Further, as shown in FIG. 10, the spot injection nozzle 101 for injecting the compressed air 102 is supported by a nozzle moving means (not shown) so as to be movable along the peripheral edge 20e of the transfer body 20. For example, it moves in the order of arrows X1, Y1, X2, and Y2, and is configured to inject compressed air 102 to all peripheral edge portions 20e of the transfer body 20. With this configuration, the number of nozzles can be reduced, and more efficient peripheral edge processing can be realized.

Here, the pressure of the compressed air 102 injected from the nozzle 101 is preferably 1 kg / cm ² or more and 5 kg / cm ² or less. If it is less than 1 kg / cm ² , the protruding resin cannot be removed, and if it exceeds 5 kg / cm ² , there is a possibility that the edge of the paper is deformed.

  Note that the number of nozzles 101 that eject the compressed air 102 is not limited to one, and a plurality of nozzles 101 may be used. For example, four nozzles 101 may be arranged at four corners of the transfer body 20, and each nozzle 101 may be moved along each arrow direction to inject compressed air 102.

  After the removal of the resin 22 protruding from the peripheral edge 20e of the transfer body 20 is finished, the suction by the suction means is stopped, the fixed holding of the transfer body 20 on the holding plate 105 is released, and the transfer at the center of the holding plate 105 is transferred. The transfer body 20 is carried out toward the outside of the apparatus by the body conveyance roll 106. Note that the transfer direction of the transfer body 20 is not limited, and the transfer body 20 can be transferred from any direction on the holding plate 105 by changing the position of the discharge roll 106. Similarly, the transfer body 20 can be unloaded in any direction on the holding plate 105 by combining a plurality of transport rolls.

  Next, a second embodiment 110 of the transfer member end processing apparatus according to the present invention will be described with reference to FIGS. In the second embodiment 110 of this transfer body end processing apparatus, a roll press member is further added to the end processing apparatus 100 in the first embodiment, and a nozzle for injecting compressed air is used as a width dimension of the transfer body. Alternatively, a slit spray nozzle that blows compressed air in a slit shape longer than the length dimension is configured to be movable integrally with the roll press member, and similar members are denoted by the same reference numerals for simplicity. Shall. FIG. 11A is a plan view of an end processing apparatus 110 for a transfer body, FIG. 11B is a side view, and FIG. 12 is a schematic diagram for explaining how the protruding resin 22 is separated and removed by a roll press member. It is.

  As shown in FIGS. 11A and 11B, the end treatment apparatus 110 for the transfer body in this embodiment has a transparent resin 21 on the entire surface of a holding plate 105 having a plurality of through holes 105a. The transfer body 20 that is covered and has an image formed thereon is disposed at a predetermined position by the transport roll 106, and is in contact with the surface of the transfer body 20 substantially in parallel with one side 20a of the transfer body 20. A roll press member 80 having an outer diameter of 20 mm is disposed. This roll press member 80 is a cylindrical body that is longer than one side 20a and extends beyond both ends of one side 20a. On the surface of the aluminum metal pipe 81, silicon having a rubber hardness of 2 mm and a rubber hardness of 20 degrees is formed. An elastic layer 82 made of rubber is formed. The aluminum metal pipe 81 is configured to be movable along the other side 20b of the transfer body 20 by a moving means (not shown) via bearings attached to both ends of the pipe. The slit injection nozzle 101 </ b> A is disposed on the downstream side in the moving direction of the roll press member 80, has a slit-shaped opening extending substantially parallel to the roll press member 80, and follows the roll press member 80. And can be moved together.

  Next, the detaching action of the above-described roll press member will be described with reference to FIG.

  The transfer body 20 is sucked and fixed through a plurality of through holes 105a provided in the holding plate 105 by suction means (not shown), and then the roll press member 80 having the elastic layer 82 provided on the surface and the nozzle 101A are transferred. The pressure transfer is performed over the entire surface of the body 20, and the compressed air 102 is ejected from the nozzle 101A, so that the resin 22 protruding from the transfer body 20 beyond the peripheral edge 20e of the transfer body 20 is dropped and dropped. The separated and removed resin 22a is discharged out of the apparatus through a plurality of through holes 105a connected to a suction means (not shown). Note that the degree of pressurization of the roll press member 80 is sufficient to bring the elastic layer 82 into contact with the surface of the transfer body 20.

  As schematically shown in FIG. 12, when the roll press member 80 moves in a predetermined direction and reaches the peripheral edge 20e of the transfer body 20, the elastic body layer 82 covered with the roll press member 80 is formed. The deformed elastic body layer 82 comes into contact with and presses the resin portion 22 protruding from the transfer body 20, thereby dropping the resin portion 22.

  The dropped resin 22a is collected by being sucked from a plurality of holes 105a provided in the holding plate 105, and once dropped, the resin 22a does not adhere to the removed image again.

  As described above, in addition to the nozzle 101 that ejects the compressed air 102 in the first embodiment, a roll press member 80 having an elastic layer 82 that contacts the surface of the transfer body 20 is further provided. By following the press member 80, the roll press member 80 and the nozzle 101 are moved together, and the elastic layer 82 provided on the surface of the roll press member 80 is brought into contact with the transfer member end portion 20e, thereby protruding the resin. The layer 22 can be removed more efficiently. Further, by making the surface of the roll press member 80 in contact with the surface of the transfer body 20 an elastic body 82, the protruding resin 22 can be reliably removed without damaging the image surface.

  Furthermore, the resin adhering to the image surface of the transfer body 20 and the surface of the roll press member 80 by injecting the compressed air 102 from the slit injection nozzle 101A to the part where the roll press member 80 and the transfer body peripheral edge 20e are brought into contact with each other. 22 can be removed synergistically and more efficiently.

  Next, a third embodiment 120 of the transfer member end processing apparatus according to the present invention will be described with reference to FIG. In the second embodiment 120 of the transfer member end processing apparatus, the slit spray nozzle 101A in the second embodiment is omitted, the configuration of the end processing apparatus 110 is simplified, and the transfer body 20 to be processed is processed. Depending on the size, the suction system of the protruding means of the protruding resin 22 is configured to be switchable. For the sake of simplicity, similar members are denoted by the same reference numerals, and detailed description thereof is omitted. FIG. 11A is a plan view showing the configuration of an end processing apparatus 120 for a transfer body, and FIG. 11B is a side view schematically showing the configuration of the end processing apparatus 120 for a transfer body.

  As shown in FIG. 13, the transfer body end processing apparatus 120 in this embodiment is provided with a roll press member 80 similar to that in the second embodiment, and has a plurality of through holes provided in the holding plate 105. The suction path 107 is connected to 105a, and the suction path 107 is connected to a suction pump 109 as a suction means via a switching valve 108 as a switching means.

  Here, the suction path 107 further has a suction chamber and a suction path corresponding to a plurality of through holes corresponding to a predetermined size of the transfer body. Specifically, for example, when processing an A4 size transfer body, a frame shape that partitions only the through hole 105a (A4) provided in a region corresponding to the peripheral edge of the A4 size transfer body. The suction chamber 107 </ b> A (R) and the suction passage 107 </ b> A communicating with the suction chamber 107 </ b> A (R) are provided on the back surface of the holding plate 105. Similarly, when processing an A3 size transfer body, a frame-like suction chamber 107B that partitions only the through hole 105a (A3) provided in a region corresponding to the peripheral edge of the A3 size transfer body. (R) and a suction path 107 </ b> B communicating therewith are provided on the back surface of the holding plate 105.

  The suction chamber 107A (R) and the suction path 107A and the suction chamber 107B (R) and the suction path 107B are connected to the suction pump 109 via the switching valve 108, respectively, and the switching valve 108 is controlled. Thus, the suction path 107A and the suction chambers 107A (R) and 107B and the suction chamber 107B (R) can be switched. Then, the transfer body 20 is sucked and fixed by a suction path 107 according to the paper size, and then a roll press member 80 having an elastic layer 82 provided on the surface is pressure-transferred over the entire surface of the transfer body 20. The resin 22a protruding from the transfer body 20 beyond the peripheral edge 20e of the transfer body 20 is dropped, and the resin 22a separated and removed is removed by the suction pump 109 via the plurality of through holes 105a. It is discharged outside.

  Note that the suction paths need not be limited to the two suction paths as described above, and an appropriate number of suction paths can be provided according to the paper size of the transfer body, and a plurality of suction pumps can be provided for each suction path. The suction and discharge may be performed independently from the road. Of course, the present invention can also be applied to the first embodiment and the second embodiment described above.

  In the case of such a configuration, it is possible to reduce the number of constituent members, thereby contributing to cost reduction and switching the suction path 107A / 107B according to the paper size. It is possible to set and use the suction pump 109 efficiently without setting the output excessively.

  In addition, it is preferable to use a surface treatment or a material that prevents the protruding resin 22 from adhering to the elastic body layer 82 of the roll press member 80 that contacts the protruding resin 22.

  Next, specific verification results when using the transfer member end processing apparatus and the image forming apparatus according to the present invention configured as described above will be shown as examples.

  First, a sample image was created when performing verification and evaluation of the edge processing apparatus for a transfer body according to the present invention.

  In the preparation of the sample image, the amount of toner on the transfer body is the weight of the transfer body 20 before and after transferring each color toner, cutting out the unfixed image portion together with the transfer body, and removing the unfixed image with compressed air. The difference was defined as the transfer amount. Further, as the length of the resin 22 protruding from the image, an average value of 10 positions measured by observing the four sides of the transfer body 20 with an optical microscope was used.

In the case of coated paper coated with white particles as the transfer body 20, mirror coated paper (basis weight 203 g / m ² ) manufactured by Oji Paper Co., Ltd. is used, and in the case of paper coated with the transparent resin layer 21. The digital coated paper gloss type (basis weight 170 g / m 2) manufactured by Fuji Xerox Co., Ltd. was cut into A6 size (89 × 127 mm), respectively.

  As the toner, Sian, magenta, and yellow toners for Acolor manufactured by Fuji Xerox Co., Ltd. were used. Further, as a binder resin for producing the toner, linear polyester obtained from terephthalic acid / bisphenol A ethylene oxide adduct / cyclohexanedimethanol (Tg = 62 ° C., Mn = 4000, Mw = 35000, specific gravity 1.2) Was used.

Sample images 1 to 3 created using the members as described above are shown below.
<Sample image 1>

Using the image forming apparatus 1 (see FIG. 1) described above, a powder toner image having a toner transfer amount of 22.1 (g / m ² ) was created on mirror coated paper manufactured by Oji Paper Co., Ltd., and the belt shown in FIG. A sample image 1 was prepared by pressurizing with a fixing roller 50 at a temperature of 170 ° C. of the heating roll 61, a temperature of 170 ° C. of the pressure roll 65, a fixing speed of 30 mm / sec, and a fixing load of 240 kg. The amount of protrusion in this sample image 1 was 252 μm.
<Sample image 2>

A powder toner image having a toner transfer amount of 14.0 (g / m ² ) is created on a digitally coated paper manufactured by Fuji Xerox Co., Ltd. using the image forming apparatus 1, and the heating roll 201 is used with the roll type fixing device shown in FIG. A sample image 2 was created by pressurizing at a temperature of 155 ° C., a pressure of a pressure roll 202 of 150 ° C., a fixing speed of 60 mm / sec, and a fixing load of 140 kg. The amount of protrusion in the sample image 2 was 90 μm.
<Sample image 3>

  In forming an image, only the cyan, magenta, and yellow toners were transferred onto the transfer body 20 without using transparent toner, and the belt type transfer fixing device 50A shown in FIG. 5 was used for fixing the transparent toner.

A powder color toner image having a toner transfer amount of 12.1 (g / m ² ) was formed on mirror-coated paper manufactured by Oji Paper Co., Ltd. that had been cut into 127 × 178 mm using the image forming apparatus 1, and the belt type shown in FIG. A sample image 3 was prepared by applying pressure at a temperature of 170 ° C. of the heating roll 61, 170 ° C. of the pressure roll 65, a fixing speed of 30 mm / sec, and a fixing load of 240 kg with the transparent resin layer transfer fixing device 50A. The transfer amount of the transparent toner formed on the fixing belt 64 was 12.0 (g / m ² ). The amount of protrusion of this sample image 3 was 5 mm.

  The results of specific verification and evaluation of the edge processing apparatus for a transfer body according to the present invention processed using the above sample images are shown below as examples.

  In this example, verification evaluation was performed under the following conditions using the first embodiment 100 (see FIG. 10) of the transfer-body edge processing apparatus.

The plurality of hole diameters of the holding plate 105 constituting the end processing apparatus 100 for the transfer body was 4 mm, and the compressed air pressure ejected from the nozzle 101 was 4 kg / cm ² . The suction by the suction pump 109 was performed from the entire back surface of the holding plate 105.

  When the above-described sample images 1 to 3 were processed by the edge processing apparatus 100 of such a transfer body, it was confirmed that all of the protruding resin 22 was removed in any of the sample images 1 to 3.

  In this example, verification evaluation was performed under the following conditions using the second embodiment 110 (see FIG. 11) of the edge processing apparatus of the transfer body.

The plurality of hole diameters of the holding plate 105 constituting the end processing apparatus 110 of the transfer body was 8 mm, and the compressed air pressure ejected from the nozzle 101A was 2 kg / cm ² . The suction by the suction pump 109 was performed from the entire back surface of the holding plate 105.

  When the above-described sample images 1 to 3 were processed by the edge processing device 110 of the transfer body, any of the sample images 1 to 3 protruded with a compressed air pressure lower than the compressed air pressure in Example 1. It was confirmed that all the resin 22 was removed.

  In this example, verification evaluation was performed under the following conditions using the third embodiment 120 (see FIG. 13) of the edge processing apparatus of the transfer body.

  The plurality of hole diameters of the holding plate 105 constituting the edge processing apparatus 120 of the transfer body was 8 mm. The suction by the suction pump 109 was performed by controlling the switching valve 108 and switching the suction paths 107A / 107B according to the size of the transfer body.

  When the above-described sample images 1 to 3 were processed by the edge processing apparatus 120 of the transfer body, it was confirmed that all of the protruding resin 22 was removed in any of the sample images 1 to 3.

  As described above, in various sample images, the effectiveness of the end treatment apparatus for a transfer body according to the present invention can be confirmed, thereby reliably removing the resin protruding from the peripheral edge of the surface of the transfer body. In addition, it is possible to provide an edge processing apparatus for an image bearing transfer member that is environmentally friendly and an image forming apparatus using the same. Become.

1 is a functional configuration diagram illustrating an outline of an image forming apparatus according to the present invention. 1 is a configuration diagram illustrating a first embodiment of a fixing device according to the present invention. It is a cross-sectional block diagram which shows the heating roll of a belt-type fixing apparatus. It is a figure which shows typically the fixing state in a belt-type fixing device. FIG. 3 is a configuration diagram illustrating a second embodiment of a fixing device according to the present invention. FIG. 6 is a configuration diagram illustrating a third embodiment of a fixing device according to the present invention. FIG. 4 is a diagram showing the state of the resin protruding from the transfer body, (a) is a schematic view showing the resin protruding from the transfer body, and (b) is a schematic sectional view thereof. FIG. 3 is a schematic diagram illustrating a configuration of a main part of the first embodiment of the transfer body end processing apparatus according to the present invention. It is a figure which shows the holding | maintenance board which comprises the edge part processing apparatus of a transcription | transfer body, (a) is a top view, (b) is sectional drawing along the AA line. It is a figure which shows each apparatus structure when a transcription | transfer body is arrange | positioned in the predetermined position on a holding | maintenance board, (a) is a top view, (b) is sectional drawing along the BB line. It is a figure which shows the structure of 2nd embodiment of the edge part processing apparatus of the transfer body which concerns on this invention. It is a schematic diagram which shows a mode that the resin which protruded is removed by the roll press member. It is a figure which shows the structure of 3rd embodiment of the edge part processing apparatus of the transfer body which concerns on this invention.

Explanation of symbols

1: color image forming device, 2: document reading device, 3: image output device, 10: photosensitive drum, 11: developing device, 12: laser diode, 13: corotron charger, 14: transfer drum, 15: transfer corotron 20: transfer paper, 20e: peripheral edge of transfer body, 21: transparent resin layer, 22: protruding resin, 50: belt type fixing device, 50A: belt type transfer fixing device, 61: heating roll, 62: peeling roll 63: Walk control roll, 64: Fixing belt, 65: Pressure roll, 66: Metal core, 67: Elastic layer, 68: Release layer, 69: Halogen lamp, 70: Heat sink for cooling, 71: Tension Roll, 72: pressure contact part, 73: cleaner, 80: roll press member, 81: metal pipe made of aluminum, 82: elastic body layer, 100: end treatment apparatus, 101 Spot spray nozzle, 101A: slit spray nozzle, 102: compressed air, 105: holding plate, 105a: through hole, 106: transport roll, 107A, 107B: suction path, 107A (R), 107B (R): suction chamber, 108: switching valve, 109: suction pump, 178: transparent toner layer, 200: roll-type fixing device, 201: heating roll, 202: pressure roll, 203: Colts lamp, 204: substrate roll, 205: inner elastic body, 206: Outer elastic body, 207: Substrate roll, 218: Colts lamp

Claims (10)

Mounted on an image forming apparatus that forms an image having excellent gloss using a transparent resin, and fixed on the fixing device of the image forming apparatus, and a fixed toner image is carried on the transfer body. An image bearing transfer body end processing apparatus that separates and removes the protruding resin that protrudes beyond the peripheral edge of the image bearing transfer body from the image bearing transfer body,
A holding plate that holds the image-carrying transfer member transferred from the fixing device and has a plurality of through holes along at least a peripheral region where a peripheral edge of the image-carrying transfer member is located;
A suction means disposed on the back side of the holding plate, and sucking the image carrying transfer body onto the holding plate by sucking air through the through hole;
An ejection nozzle that is disposed on the opposite side of the suction unit with respect to the holding plate, and that injects compressed air to a peripheral edge of the image bearing transfer member;
The protruding resin present at the peripheral edge of the image carrying transfer body transferred from the fixing device onto the holding plate is separated and removed from the image carrying transfer body by the suction means and the ejection nozzle. An edge processing apparatus for an image bearing transfer member.   2. A plurality of through holes are formed in the holding plate corresponding to a peripheral region where peripheral edge portions of a plurality of sizes of transfer members used in the image forming apparatus are located. An edge processing apparatus for an image bearing transfer member according to the description.   A roll having a cylindrical body longer than the width or length of the image-carrying transfer member held on the surface of the holding plate and having an elastic layer on the surface of the holding plate. A pressing member is provided, and the image-carrying transfer member is transferred onto the image-carrying transfer member held on the holding plate under pressure to remove the protruding resin present at the peripheral edge of the image-carrying transfer member. The edge processing apparatus for an image bearing transfer body according to claim 1 or 2, wherein the edge processing apparatus is separated from the body.   The spray nozzle is a spot spray nozzle that sprays compressed air in a spot shape within a predetermined size range, and includes a moving unit so that the entire periphery can be moved along the peripheral edge of the image carrying transfer body. The edge processing apparatus for an image bearing transfer member according to claim 1, wherein   The ejection nozzle is a slit ejection nozzle that blows compressed air in a slit shape longer than a width dimension or a length dimension of the image-carrying transfer body held on the surface of the holding plate, and one side of the image-carrying transfer body 4. The end of the image bearing transfer body according to claim 1, further comprising a moving means so as to be movable from the peripheral edge of the other side toward the peripheral edge of the other side opposite to each other. Processing unit.   6. The edge processing apparatus for an image bearing transfer member according to claim 5, wherein the jet nozzle moves following the roll press member to be transferred following the roll press member. A holding plate that holds the image carrying transfer body transferred from the fixing device and has a large number of through holes along a peripheral region where at least a peripheral edge of the image carrying transfer body is located;
A suction means disposed on the back side of the holding plate, and sucking the image carrying transfer body onto the holding plate by sucking air through the through hole;
It is formed of a cylindrical body that is longer than the width or length of the image-carrying transfer member held on the surface of the holding plate, has an elastic layer on the surface, and is disposed on the surface side of the holding plate. A roll press member for transferring the image bearing transfer member transferred onto the holding plate under pressure,
The protruding resin present at the peripheral edge of the image carrying transfer body transferred from the fixing device onto the holding plate is separated from the image carrying transfer body by the suction means and the roll press member and removed. An edge processing apparatus for an image bearing transfer member.   8. The holding plate is provided with a plurality of through holes corresponding to a peripheral region where peripheral edge portions of a plurality of sizes of transfer members used in the image forming apparatus are located. An edge processing apparatus for an image bearing transfer member according to the description.   A plurality of suction chambers divided according to the size of the transfer body are formed on the rear surface side of the holding plate, and a suction path connecting the suction chambers to the suction means is provided on the holding plate. 9. An end portion of the image bearing transfer member according to claim 1, further comprising a switching unit that switches a connection between each of the suction chambers and the suction unit. Processing equipment. An edge processing apparatus for an image bearing transfer member according to any one of claims 1 to 9,
Image forming means for forming an unfixed toner image on the transfer body based on the image information;
An image forming apparatus comprising: a fixing unit that fixes an unfixed toner image formed by the image forming unit.

Images