WO2022059351A1 - 画像形成装置 - Google Patents
画像形成装置 Download PDFInfo
- Publication number
- WO2022059351A1 WO2022059351A1 PCT/JP2021/027605 JP2021027605W WO2022059351A1 WO 2022059351 A1 WO2022059351 A1 WO 2022059351A1 JP 2021027605 W JP2021027605 W JP 2021027605W WO 2022059351 A1 WO2022059351 A1 WO 2022059351A1
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- Prior art keywords
- paper
- roll
- unit
- blower
- image forming
- Prior art date
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Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2017—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means
- G03G15/2028—Structural details of the fixing unit in general, e.g. cooling means, heat shielding means with means for handling the copy material in the fixing nip, e.g. introduction guides, stripping means
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
- G03G15/657—Feeding path after the transfer point and up to the fixing point, e.g. guides and feeding means for handling copy material carrying an unfused toner image
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6529—Transporting
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
- G03G15/6558—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/65—Apparatus which relate to the handling of copy material
- G03G15/6555—Handling of sheet copy material taking place in a specific part of the copy material feeding path
- G03G15/6558—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point
- G03G15/6561—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point for sheet registration
- G03G15/6564—Feeding path after the copy sheet preparation and up to the transfer point, e.g. registering; Deskewing; Correct timing of sheet feeding to the transfer point for sheet registration with correct timing of sheet feeding
Definitions
- the present invention relates to an image forming apparatus.
- Patent Document 1 discloses a configuration in which a transfer material is conveyed by a transfer member made of an endless wire, and an unfixed toner image transferred to the transfer material is heated and melted by radiant heat.
- the image forming apparatus transports the recording medium while holding the image forming unit that forms an image at the image forming position on one surface of the recording medium and the front end side of the recording medium, and passes the recording medium through the image forming position. It is conceivable to include a unit and a transport body that transports the recording medium together with the transport unit while supporting the other surface of the recording medium on which the image is formed by the image forming unit. In this configuration, the recording medium may flutter in a configuration in which the other surface of the recording medium whose rear end is separated from the carrier by the transfer by the transfer unit is supported after the separation.
- At least one embodiment of the present invention suppresses fluttering of the recording medium as compared with a configuration in which the other surface of the recording medium whose rear end is separated from the carrier by the transfer by the transfer unit is supported after the separation.
- the recording medium is conveyed while holding the image forming portion that forms an image at the image forming position on one surface of the recording medium and the front end side of the recording medium, and is passed through the image forming position.
- the transport unit that transports the recording medium together with the transport unit while supporting the other surface of the transport unit and the recording medium on which the image is formed by the image forming unit is separated from the transport body by the transport by the transport unit.
- An image forming apparatus including a support portion that supports the other surface of the recording medium before separation.
- the carrier carries the recording medium in a state of being sandwiched between the image forming section, and the supporting section is the carrier and the image forming section. Before the rear end of the recording medium finishes passing through the sandwiching position with, the support of the other surface is started.
- the support portion supports the other surface on the rear end side of the holding position where the transport portion holds the front end side of the recording medium. do.
- the support portion supports the other surface in a non-contact manner.
- the support portion is a blower portion that blows air to the other surface.
- the fluttering of the recording medium is suppressed as compared with the configuration in which the other surface of the recording medium whose rear end is separated from the carrier by the transfer by the transfer unit is supported after the separation.
- the support portion starts to support the other surface of the recording medium after the rear end of the recording medium has passed through the sandwiching position between the carrier and the image forming portion. In comparison, the fluttering of the recording medium is suppressed.
- the fluttering of the recording medium is suppressed as compared with the configuration in which the support portion supports the other surface at the same position as the holding position where the transport portion holds the front end side of the recording medium.
- the support portion is prevented from interfering with the transport portion as compared with the configuration in which the support portion contacts the other surface of the recording medium to support the recording medium.
- the degree of freedom of the material used for the recording medium is higher than that of the configuration in which the support portion supports the other surface of the recording medium in a non-contact manner by magnetic force or electrostatic force.
- FIG. 1 is a schematic view showing a configuration of an image forming apparatus according to the present embodiment.
- FIG. 2 is a schematic view showing the configuration of the toner image forming portion according to the present embodiment.
- FIG. 3 is a schematic view showing the configuration of the fixing device according to the present embodiment.
- FIG. 4 is a plan view showing the configuration of the fixing device according to the present embodiment.
- FIG. 5 is an enlarged schematic view showing a part of the fixing unit according to the present embodiment.
- FIG. 6 is a plan view showing a fixing unit according to the present embodiment.
- FIG. 7 is a perspective view showing a modified example of the chain gripper.
- FIG. 8 is a side view showing a modified example of the blower.
- FIG. 9 is a schematic view showing the configuration of the modified example 1.
- FIG. 10 is a schematic view showing the configuration of the modified example 2.
- the arrow H shown in each figure is a vertical direction and indicates the vertical direction of the device
- the arrow W is the horizontal direction and indicates the width direction of the device
- the arrow D is the front-rear direction of the device (the depth direction of the device).
- FIG. 1 is a schematic view showing the configuration of the image forming apparatus 10 according to the present embodiment.
- the image forming apparatus 10 shown in FIG. 1 is an example of an image forming apparatus that forms an image on a recording medium.
- the image forming apparatus 10 is an electrophotographic image forming apparatus that forms a toner image on paper P as an example of a recording medium.
- the image forming apparatus 10 includes an accommodating portion 50, a discharging portion 52, an image forming unit 12, an opposed roll 36, a transport mechanism 60, and an inversion mechanism 80. It has a fixing device 100, a blowing mechanism 170, and a cooling unit 90.
- the accommodating portion 50 shown in FIG. 1 has a function of accommodating the paper P.
- a plurality (for example, two) of the accommodating portions 50 are provided. Paper P is selectively sent out from the plurality of accommodating portions 50.
- the paper P as an example of the recording medium, a sheet of paper (cut paper) having a predetermined size is used. Further, the paper P has a front surface PA (see FIG. 5) as an example of one side and a back surface PB (see FIG. 5) as an example of the other side.
- the surface PA of the paper P has an image region GR on which the toner image is transferred (see FIG. 4), that is, an image region GR on which an unfixed image is formed.
- the ejection unit 52 shown in FIG. 1 is a portion where the paper P on which the image is formed is ejected. Specifically, after the image is fixed by the fixing device 100, the paper P cooled by the cooling unit 90 is discharged to the discharging unit 52.
- the image forming unit 12 shown in FIG. 1 is an example of an image forming unit that forms an image on one surface of a recording medium. Specifically, the image forming unit 12 has a function of forming a toner image on the surface PA of the paper P by an electrophotographic method. More specifically, as shown in FIG. 1, the image forming unit 12 transfers the toner image forming unit 20 that forms the toner image and the toner image formed by the toner image forming unit 20 to the paper P. It has a device 30 and.
- the facing roll 36 (also referred to as a transfer cylinder or a transfer body) is an example of a carrier. The configuration of the opposed roll 36 will be described together with the configuration of the transfer device 30.
- Toner image forming unit 20 A plurality of toner image forming units 20 are provided so as to form a toner image for each color.
- the image forming apparatus 10 includes a toner image forming unit 20 having a total of four colors of yellow (Y), magenta (M), cyan (C), and black (K).
- Y), (M), (C), and (K) shown in FIG. 1 indicate components corresponding to the above colors.
- the toner image forming unit 20 of each color is basically configured in the same manner except for the toner to be used. Specifically, as shown in FIG. 2, the toner image forming unit 20 of each color has a photoconductor drum 21 (photoreceptor) rotating in the direction of arrow A in FIG. 2 and a charger for charging the photoconductor drum 21. 22 and. Further, the toner image forming unit 20 of each color exposes the photoconductor drum 21 charged by the charger 22 to form an electrostatic latent image on the photoconductor drum 21, and the photoconductor drum 21 is formed by the photographic device 23. It has a developing device 24 that develops an electrostatic latent image formed in 21 to form a toner image.
- the transfer device 30 shown in FIG. 1 has a function of superimposing a toner image of a photoconductor drum 21 of each color on an intermediate transfer body for primary transfer, and for secondary transfer of the superimposed toner image to paper P. ing.
- the transfer device 30 includes a transfer belt 31 as an intermediate transfer body, a primary transfer roll 33, and a secondary transfer unit 34.
- the primary transfer roll 33 has a function of transferring the toner image formed on the photoconductor drum 21 to the transfer belt 31 at the primary transfer position T (see FIG. 2) between the photoconductor drum 21 and the primary transfer roll 33. is doing.
- the transfer belt 31 has an endless shape and is wound around a plurality of rolls 32 to determine its posture.
- the transfer belt 31 is rotated in the direction of arrow B by rotationally driving at least one of the plurality of rolls 32, and conveys the primary transferred image to the secondary transfer position NT.
- the facing roll 36 is arranged on the lower side of the transfer belt 31 so as to face the transfer belt 31.
- the secondary transfer unit 34 is arranged inside the transfer belt 31 so that the transfer belt 31 is arranged between the secondary roll 36 and the counter roll 36.
- the secondary transfer unit 34 is composed of a corotron.
- the space between the secondary transfer unit 34 and the counter roll 36 is set as the secondary transfer position NT.
- the opposing roll 36 and the transfer belt 31 are in contact with each other.
- the secondary transfer unit 34 and the opposed roll 36 constitute a transfer unit 35 that transfers the toner image transferred to the transfer belt 31 onto the paper P.
- the secondary transfer position NT is an example of an image forming position.
- the paper P to be conveyed while the front end portion is held by the chain gripper 66 described later of the conveying mechanism 60 is arranged on the outer peripheral surface of the opposed roll 36, and the paper is arranged by the chain gripper 66 and the opposed roll 36.
- P is conveyed and passed through the secondary transfer position NT. That is, the opposed roll 36 conveys the paper P while supporting the back surface PB of the paper P on the outer peripheral surface.
- the paper P that has passed through the secondary transfer position NT is further conveyed by the chain gripper 66, and the rear end thereof is separated from the facing roll 36.
- the toner image transferred to the transfer belt 31 is transferred to the paper P passing through the secondary transfer position NT by the electrostatic force generated by the discharge of the secondary transfer unit 34.
- the secondary transfer position NT the opposing roll 36 and the transfer belt 31 are conveyed with the paper P sandwiched between them. Therefore, it can be said that the secondary transfer position NT is a sandwiching position in which the paper P is sandwiched between the facing roll 36 and the transfer belt 31.
- the transport mechanism 60 shown in FIG. 1 is a mechanism for transporting the paper P. Specifically, the transport mechanism 60 has a function of transporting the paper P accommodated in the accommodating portion 50 and allowing the paper P to pass through the secondary transfer position NT. Further, the transport mechanism 60 has a function of transporting the paper P from the secondary transfer position NT to the fixing unit 120 (heated roll 130 and pressure roll 140 described later) described later. In other words, the transport mechanism 60 has a function of transporting the paper P on which the toner image is transferred in the fixing device 100.
- the transport mechanism 60 has a delivery roll 62, a plurality of transport rolls 64, and a chain gripper 66.
- the delivery roll 62 is a roll that sends out the paper P stored in the storage unit 50.
- the plurality of transport rolls 64 are rolls for transporting the paper P delivered by the delivery roll 62 to the chain gripper 66.
- the chain gripper 66 is a transport unit that holds the front end side (tip side) of the paper P and transports the paper P.
- the chain gripper 66 includes a pair of chains 72 and a gripper 76 as a holding member (grip member).
- the pair of chains 72 are formed in an annular shape as shown in FIG.
- the pair of chains 72 are arranged at intervals in the front-rear direction of the device (direction D in FIG. 1) (see FIG. 4).
- the pair of chains 72 are spaced apart from a pair of sprockets (not shown) arranged on one end side and the other end side in the axial direction with respect to each of the facing roll 36 and the pressure roll 140 described later, respectively, in the front-rear direction of the device. It is wound around a pair of sprockets 74, which are arranged so as to be separated from each other. When any one of these pairs of sprockets rotates, the chain 72 orbits in the direction of arrow C (see FIG. 1).
- a mounting member 75 to which the gripper 76 is mounted is hung on the pair of chains 72 along the front-rear direction of the device.
- a plurality of mounting members 75 are fixed to a pair of chains 72 at predetermined intervals along the circumferential direction (circumferential direction) of the chain 72.
- the components of the chain 72 are shown in a block shape.
- a plurality of grippers 76 are attached to the attachment member 75 at predetermined intervals along the front-rear direction of the device.
- the gripper 76 has a function of holding (grasping) the front end portion of the paper P. By holding the front end portion of the paper P, the position of the paper P in the paper transport direction can be easily determined, and the alignment (registration alignment) between the paper P and the image can be easily performed in the transfer unit 35.
- the gripper 76 has a claw 76A and a claw base 76B, as shown in FIGS. 3 and 5.
- the gripper 76 is configured to hold the paper P by sandwiching the front end portion of the paper P between the claw 76A and the claw stand 76B.
- the gripper 76 holds the front end portion of the paper P outside the image region GR (see FIG. 4) on which the toner image on the surface PA is transferred. Further, in the present embodiment, the gripper 76 arranged on the downstream side in the transport direction with respect to the paper P holds the front end portion of the paper P from the downstream side in the transport direction of the paper P.
- the claw 76A is pressed against the claw base 76B by a spring or the like, and the claw 76A is opened and closed against the claw base 76B by the action of a cam or the like.
- a position for cutting to the finished size and a mark for registering multicolor printing may be formed.
- Such an image may be formed at an overlapping position with the gripper 76 in the top view shown in FIG. Further, the gripper 76 may partially overlap with the image region GR, but the formed image should not overlap.
- the paper P is conveyed by the chain 72 rotating in the direction of the arrow C while the gripper 76 holds the front end portion of the paper P.
- the chain gripper 66 conveys the paper P to the secondary transfer position NT with the surface PA facing upward, and passes the paper P through the secondary transfer position NT. Further, the chain gripper 66 passes the paper P through the heating unit 102 described later, and then conveys the paper P to the fixing unit 120 described later. Since the chain gripper 66 holds the front end portion but does not hold the rear end side of the paper P, the paper P in a state of being conveyed only by the chain gripper 66 is in a free state on the rear end side.
- the chain gripper 66 is a portion having a function of passing the paper P through the heating unit 102 and transporting the paper P from the heating unit 102 to the fixing unit 120, and also serves as the fixing device 100.
- a part of the transport path in which the paper P is transported by the transport mechanism 60 is shown by a chain double-dashed line in FIG.
- the upstream in the transport direction in which the transport mechanism 60 transports the paper P may be simply referred to as “upstream”, and the downstream in the transport direction may be simply referred to as “downstream”.
- the inversion mechanism 80 shown in FIG. 1 is an example of an inversion mechanism that inverts the front and back of a recording medium on which an image is fixed by a fixing device.
- the reversing mechanism 80 is a mechanism for reversing the front and back of the paper P on which the toner image is fixed by the fixing device 100.
- the reversing mechanism 80 includes a plurality of (for example, two) transport rolls 82, a reversing device 84, and a plurality of (for example, seven) transport rolls 86. is doing.
- the plurality of transport rolls 82 are rolls for transporting the paper P sent from the fixing device 100 to the reversing device 84.
- the reversing device 84 twists the paper P like a Mobius strip by transporting the paper P while folding back a plurality of sheets so that the transport direction of the paper P changes by, for example, 90 degrees. It is said to be a device that reverses the front and back.
- the plurality of transport rolls 86 are rolls for transporting the paper P whose front and back sides have been reversed by the reversing device 84 to the chain gripper 66. That is, the plurality of transport rolls 86 have a function of delivering the paper P whose front and back sides are reversed to the chain gripper 66.
- the reversing mechanism 80 reverses the front and back of the paper P and delivers it to the chain gripper 66, so that the chain gripper 66 has the delivered paper P on the back surface PB of the fixed toner image. Transport as.
- the reversing mechanism 80 may be a mechanism for reversing by switching back the paper P.
- the fixing device 100 shown in FIG. 3 is an example of a fixing device for fixing an image formed by an image forming unit on a recording medium. Specifically, the fixing device 100 is a device for fixing the toner image transferred by the transfer device 30 to the paper P.
- the fixing device 100 is arranged on the downstream side of the secondary transfer position NT in the transport direction of the paper P. As shown in FIG. 3, the fixing device 100 has a heating unit 102, the above-mentioned chain gripper 66, and a fixing unit 120 (fixing unit).
- the heating unit 102 shown in FIG. 3 is an example of a heating unit that heats the surface of the recording medium in a non-contact manner. Specifically, the heating unit 102 has a function of non-contactly heating the surface PA of the paper P conveyed by the chain gripper 66.
- the heating unit 102 is arranged on the downstream side of the secondary transfer position NT (see FIG. 1) in the transport direction of the paper P so as to face the surface PA of the paper P transported by the chain gripper 66. .. Specifically, the heating unit 102 includes a reflector 104, a plurality of heaters 106 (heating sources), and a wire mesh 112.
- the reflector 104 has a function of reflecting infrared rays from the heater 106 to the lower side of the device (the paper P side conveyed by the chain gripper 66).
- the reflector 104 is formed by using a metal plate such as an aluminum plate.
- the reflector 104 is formed in a box shape in which the lower side of the device is open.
- the heater 106 is a columnar infrared heater having a length in the front-rear direction of the device.
- a plurality (for example, 40) of heaters 106 are arranged inside the reflector 104 along the width direction of the device.
- the heater 106 includes a carbon filament 109 and a cylindrical quartz tube 108 in which the carbon filament 109 is housed.
- a black infrared radiation film is formed on the surface of the quartz tube 108. As described above, by forming the black infrared radiation film on the surface of the quartz tube 108, for example, the heater 106 emits infrared rays more efficiently than in the case where the white film is formed. It has become.
- the heater 106 is enlarged and shown on the upper left side of the heating unit 102.
- the infrared heater 106 in this embodiment has a wavelength peak of the infrared radiation wavelength set to 2 [ ⁇ m] or more and 5 [ ⁇ m] or less, which is a so-called far infrared region.
- the surface temperature of the heater 106 of the heating unit 102 is set to a predetermined temperature of 300 [° C.] or more and 1175 [° C.] or less. Further, in the present embodiment, the length of the reflector 104 in the device width direction is 1 [m], and the heaters 106 that efficiently radiate far infrared rays are arranged in the device width direction at a density of 20 or more and 100 or less. , Good heating distribution is obtained.
- the number of far-infrared heaters 106 per meter is less than 20.
- the carbon filament can predominantly emit far-infrared rays, so that 20 far-infrared rays, which are less dependent on the distance from the radioactive source for toner melting, are used. Since it can be used effectively as compared with the case of less than, the melting unevenness between the heaters 106 is reduced. If the number is larger than 100, excessive far infrared rays are radiated, which makes it difficult to control the temperature of the irradiated object to the extent that the toner melts. In addition, the fixing device in the subsequent stage heats the toner. It is heated by the above and it becomes difficult to control the temperature, so 100 or less is preferable. In particular, when transporting a recording medium of B2 size or larger so that the transport direction of the recording medium is on the long side, 30 or more and 50 or less are preferable.
- wire mesh 112 The wire mesh 112 is fixed to the edge of the lower opening of the reflector 104. As a result, the wire mesh 112 separates the inside of the reflector 104 from the outside of the reflector 104. The wire mesh 112 prevents the paper P conveyed by the chain gripper 66 from coming into contact with the heater 106.
- the chain gripper 66 shown in FIG. 3 is an example of a transport unit that conveys the recording medium while facing the surface of the recording medium to the heating unit.
- the gripper 76 provided in the chain gripper 66 is an example of a holding portion that holds at least the front end side of the recording medium.
- the front end side of the recording medium is a portion of the recording medium on the downstream side (front side) from the center in the transport direction.
- the paper P is attached to the heater 106 of the heating unit 102 by the chain 72 rotating in the direction of arrow C while the gripper 76 holds the front end portion of the paper P. Paper P is conveyed while facing the surface PAs of the above. That is, the chain gripper 66 has a function of passing the paper P through the heating region of the heating unit 102. In the transport by the chain gripper 66, the rear end side of the paper P is not held and is in a free state.
- the chain gripper 66 has a function of transporting the paper P from the heating unit 102 to the fixing unit 120.
- the chain gripper 66 functions as an example of the transport unit of the fixing device 100 in the portion having the function of passing the paper P through the heating region of the heating unit 102 and transporting the paper P from the heating unit 102 to the fixing unit 120. is doing.
- the fixing unit 120 shown in FIG. 3 is a fixing unit for fixing the image of the paper P to the paper P.
- the fixing unit 120 has a function of fixing the toner image to the paper P by contacting the paper P to heat and pressurize the paper P.
- the heating unit 102 for heating and pressurizing will be used, but heating is not always necessary, and the surface property of the toner melted in the heating unit 102 in the previous step is improved, for example, the gloss is adjusted.
- it can be applied only in the form in which pressurization is performed by the pressurizing portion.
- the fixing unit 120 is arranged on the downstream side of the heating unit 102 in the transport direction of the paper P. Specifically, the fixing unit 120 has a heating roll 130, a pressure roll 140, and a driven roll 150.
- the heating roll 130 shown in FIG. 3 is an example of a heating member that is arranged on the downstream side in the transport direction with respect to the heating unit and heats the recording medium. Specifically, the heating roll 130 is arranged on the downstream side in the transport direction with respect to the heating unit 102, and has a function of contacting the paper P to heat the paper P. The heating roll 130 is arranged with the front-rear direction of the device as the axial direction so as to come into contact with the surface PA of the paper P.
- the heating roll 130 is provided inside the cylindrical base material 132, the rubber layer 134 formed on the outer periphery of the base material 132, the release layer 136 formed on the outer periphery of the rubber layer 134, and the base material 132. It has a housed heater 138 (heating source).
- the heater 138 is composed of, for example, a single or a plurality of halogen lamps.
- the heating roll 130 is provided with an abutting portion 139 that is abutted against the abutting portion 149 provided on the pressure roll 140, which will be described later.
- the abutted portion 139 is an example of the abutted portion provided on the heating roll.
- the abutted portion 139 is formed in a cylindrical shape having an outer diameter equivalent to that of the heating roll 130.
- the abutted portion 139 is provided at one end and the other end in the axial direction of the heating roll 130 so as to rotate coaxially with the heating roll 130 and integrally with the heating roll 130.
- the driven roll 150 shown in FIG. 3 is arranged with the front-rear direction of the device as the axial direction so as to come into contact with a region other than the contact region with respect to the paper P on the outer peripheral surface of the heating roll 130. Further, the driven roll 150 has a cylindrical base material 152 and a heater 154 (heating source) housed inside the base material 152. The driven roll 150 rotates in accordance with the heating roll 130 to heat the heating roll 130. Since the heating roll 130 is heated by the driven roll 150 and the heating roll 130 itself has the heater 138, the surface temperature of the heating roll 130 becomes a predetermined temperature.
- the pressure roll 140 shown in FIG. 3 is an example of a pressure member in which a recording medium is pressed between the pressure roll and the heating roll and a recess into which the holding portion enters is formed on the outer peripheral surface.
- the pressurizing roll 140 has a function of sandwiching the paper P with the heating roll 130 to pressurize the paper P.
- the pressure roll 140 is arranged below the heating roll 130 with the device front-rear direction as the axial direction.
- the pressure roll 140 has a cylindrical base material 142, a rubber layer 144 formed on the outer periphery of the base material 142, and a release layer 146 formed on the outer periphery of the rubber layer 144.
- the circumference of the pressure roll 140 is the same as the arrangement interval in which the gripper 76 is arranged on the chain 72. Further, as shown in FIGS. 5 and 6, a recess 148 extending in the front-rear direction of the device is formed on the outer peripheral surface of the pressure roll 140.
- the gripper 76 holding the front end side of the paper P passes between the pressure roll 140 and the heating roll 130, the gripper 76 is configured to enter the recess 148.
- the pressure roll 140 is provided with an abutting portion 149 that abuts against the abutting portion 139 of the heating roll 130.
- the abutting portion 149 is an example of an abutting portion which is provided on the outer side in the axial direction with respect to the concave portion of the pressure roll and abuts against the abutted portion 139 to maintain the axial distance between the heating roll 130 and the pressure roll 140.
- the abutting portion 149 is formed in a cylindrical shape having an outer diameter equivalent to that of the pressure roll 140.
- the abutting portion 149 is provided on the outer side in the axial direction with respect to the recess 148 of the pressure roll 140.
- the abutting portion 149 is provided at one end and the other end in the axial direction of the pressure roll 140 so as to rotate coaxially with the pressure roll 140 and integrally with the pressure roll 140. ..
- the heating roll 130 and the pressure roll 140 By rotating the heating roll 130 and the pressure roll 140 while the abutting portion 149 is abutting against the abutting portion 139, even if the recess 148 faces the heating roll 130, it is added to the heating roll 130.
- the distance between the shafts with the pressure roll 140 is maintained.
- the surface pressure of the load in which the pressure roll 140 is urged toward the heating roll 130 by the urging member (not shown) falls within a certain range.
- the surface pressure in a conventional general fuser is about 400 [kPa].
- the pressure roll 140 is rotationally driven by a drive unit (not shown), the heating roll 130 is rotated according to the pressure roll 140, and the heating roll 130 is driven by the driven roll 130. 150 rotates.
- the blower mechanism 170 shown in FIG. 3 is an example of a support portion and also an example of a blower portion.
- the blowing mechanism 170 is a mechanism for blowing air to the back surface PB of the paper P.
- the blower mechanism 170 includes a blower 160 and a ventilation plate 180.
- the blower 160 shown in FIG. 3 is a device that blows air toward the back surface PB of the paper P.
- a plurality of the blowers 160 are arranged inside the chain 72 (inner peripheral side) when viewed in the front-rear direction of the device, and below the heating unit 102.
- the plurality of blowers 160 are arranged in a two-dimensional shape (matrix shape) along the transport direction of the paper P and the front-rear direction of the device. In FIG. 4, some blades of the blower 160 are omitted in order to simplify the illustration of the blower 160.
- the blower 160 faces upward and is configured to blow air upward. That is, the configuration is such that air is blown in the thickness direction of the paper P only to the back surface PB of the paper P facing the heating unit 102.
- the blower 160 is arranged so as to face the back surface PB of the paper P conveyed by the chain gripper 66.
- the chain gripper 66 is configured to convey the paper P while facing the back surface PB of the paper P to the blower 160.
- an axial blower that blows air in the axial direction is used as the blower 160.
- a centrifugal blower that blows air in the centrifugal direction such as a multi-blade blower (for example, a sirocco fan), may be used.
- the paper P is lifted by blowing air to the back surface PB of the paper P conveyed by the chain gripper 66.
- the back surface PB of the paper P is in a non-contact state.
- at least the back surface PB in the image area GR of the paper P is in a non-contact state.
- at least the back surface PB in the image region GR of the paper P is in a non-contact state with respect to the ventilation plate 180. Therefore, the blower 160 has a function of maintaining the non-contact state so that the paper P is conveyed by the chain gripper 66 in the non-contact state of the back surface PB in the image region GR of the paper P.
- the back surface PB outside the image area GR of the paper P is allowed to come into contact with the ventilation plate 180. It is necessary to prevent the air blown from the blower port of the blower 160 from being directly supplied to the surface PA of the paper P.
- the image forming apparatus 10 of the present embodiment is an image forming apparatus of a type that forms an image using dry toner, and when air is supplied directly to the surface of the paper P from the air outlet, an unfixed toner image is produced. This is because there is a risk of disturbance. Further, by supplying air only to the back surface PB, cooling of the toner transferred to the front surface PA is suppressed.
- the ventilation plate 180 shown in FIG. 3 is an example of a ventilation portion having a plurality of ventilation holes for passing air blown from the ventilation portion toward the back surface of the recording medium.
- the ventilation plate 180 is composed of a plate having a plurality of ventilation holes 182 through which air blown from the blower 160 toward the back surface PB of the paper P is passed.
- the ventilation plate 180 is arranged inside the chain 72 (inner peripheral side) when viewed in the front-rear direction of the device, below the heating unit 102 and above the blower 160, with the device vertical direction as the thickness direction. That is, it is arranged so as to cover the blower 160 on the blower direction side of the blower 160.
- the ventilation plate 180 can be said to be an example of an arrangement member arranged so as to face the back surface PB of the paper P conveyed by the chain gripper 66.
- Each ventilation hole 182 penetrates in the thickness direction of the ventilation plate 180.
- the plurality of ventilation holes 182 are arranged in a two-dimensional shape (matrix shape) along the transport direction of the paper P and the front-rear direction of the device.
- a part of the ventilation hole 182 is omitted in order to simplify the illustration of the ventilation plate 180.
- this ventilation plate 180 the air blown from the blower 160 is passed through a plurality of ventilation holes 182 and is applied to the back surface PB of the paper P conveyed by the chain gripper 66.
- the blower 160 is configured to blow air to the back surface PB of the paper P conveyed by the chain gripper 66 via the ventilation plate 180 in which a plurality of ventilation holes 182 are formed.
- the ventilation plate 180 is made of a metal plate.
- the ventilation plate 180 also has a function as a reflector that reflects infrared rays from the heater 106 to the upper side of the device (the paper P side conveyed by the chain gripper 66).
- the blower 160 blows air to the back surface PB of the paper P conveyed by the chain gripper 66 via the ventilation plate 180 in which a plurality of ventilation holes 182 are formed.
- the blower mechanism 170 supports the paper P from the back surface PB.
- blower mechanism 170 As shown in FIG. 3, the upstream end 170X of the blower region set by the blower 160 and the vent plate 180 is located between the secondary transfer position NT and the holding position 66X shown in FIG. Have been placed. Specifically, the upstream end portion 170X is arranged on the downstream side with respect to the secondary transfer position NT and on the upstream side with respect to the holding position 66X.
- the upstream end 170X of the blowing region of the blowing mechanism 170 is arranged between the separation position 36X and the holding position 66X shown in FIG. Specifically, the upstream end portion 170X is arranged on the downstream side with respect to the separation position 36X and on the upstream side with respect to the holding position 66X.
- the separation position 36X is a position where the rear end of the paper P conveyed by the chain gripper 66 is separated from the facing roll 36.
- the separation position 36X can be said to be the downstream end of the region where the paper P comes into contact with the outer peripheral surface of the facing roll 36.
- the separation position 36X is located on the downstream side with respect to the secondary transfer position NT.
- the rear end of the paper P is separated by the downstream end portion 36Z of the opposing roll 36 (clockwise at an angle of 270 degrees from the upper end of the opposing roll 36). That is, the separation position 36X may be located at the downstream end portion 36Z of the facing roll 36.
- the holding position 66X is a position where the chain gripper 66 holds the paper P when the rear end of the paper P conveyed by the chain gripper 66 is located at the separation position 36X.
- the paper P here is the smallest size paper P used in the image forming apparatus 10.
- the holding position 66X may be at least a holding position defined by the maximum size paper P used in the image forming apparatus 10.
- the blower mechanism 170 the back surface PB is started to be supported by the blower before the rear end of the paper P passes through the separation position 36X. That is, the blowing mechanism 170 starts supporting the back surface PB by blowing before the rear end of the paper P is separated from the facing roll 36. Specifically, the blowing mechanism 170 starts supporting the back surface PB by blowing before the rear end of the paper P finishes passing through the secondary transfer position NT. That is, the blast mechanism 170 starts supporting the back surface PB by blasting while the paper P has passed through the secondary transfer position NT.
- the blower mechanism 170 blows air to the back side PB of the paper P that has passed through the secondary transfer position NT until the rear end of the paper P reaches the downstream side with respect to the blower region, and supports the back side PB of the paper P. do.
- the blower mechanism 170 supports the back surface PB of the paper P whose rear end is separated from the facing roll 36 by the transfer by the chain gripper 66 from before the separation. Since the airflow tends to be unstable at the start of blowing, it can be said that it is preferable to start blowing when the facing roll 36 and the back surface PB of the paper P are in contact (before separation).
- the upstream end portion 170X of the blowing region of the blowing mechanism 170 is arranged between the separation position 36X and the holding position 66X shown in FIG. 3, the holding position of the paper P on the back surface PB.
- the rear end of the paper P is separated from the facing roll 36 in a state where the air is blown toward the rear end side of the 66X. That is, in a state where the blower mechanism 170 supports the back surface PB on the rear end side of the holding position 66X, the rear end of the paper P is separated from the facing roll 36.
- the blower region set by the blower 160 and the ventilation plate 180 is set longer toward the upstream in the transport direction of the paper P than the heating region set by the heating unit 102 described above. That is, the paper P after passing through the transfer unit 35 is blown on the back surface PB by the blower 160 before rushing into the heating unit 102. As a result, the paper P is carried to the heating unit 102 in a stable posture. More preferably, the blowing region is set immediately after the transfer unit 35 and toward the downstream side in the transport direction of the paper P, starting from a position that does not overlap with the transfer belt 31 in the gravity direction.
- the blower region set by the blower 160 and the ventilation plate 180 is set longer toward the downstream in the transport direction of the paper P than the heating region set by the heating unit 102 described above. That is, the blowing mechanism 170 blows air to the back surface PB of the paper P even after passing through the heating region of the heating unit 102. As a result, the paper P is carried to the fixing unit 120 in a stable posture.
- the cooling unit 90 is arranged on the downstream side of the fixing unit 120 in the transport direction of the paper P. Further, the cooling unit 90 includes a plurality of (for example, two) cooling rolls 92 arranged in the width direction of the device.
- the cooling roll 92 is composed of a cylindrical roll made of metal or the like.
- the cooling roll 92 is configured to cool the paper P by air cooling (heat exchange with air) by circulating air inside the cooling roll 92.
- the length of the paper P used in the image forming apparatus 10 in the transport direction is 570 mm or more and 680 mm or less.
- the distance along the circumferential direction (transport direction) between the plurality of grippers 76 arranged along the circumferential direction of the chain 72 is 840 mm as an example.
- the distance along the circumferential direction (conveying direction) between the papers P held by each of the plurality of grippers 76 is, for example, 160 mm or more and 270 mm or less.
- the distance L1 from the upstream end 170Z of the blower mechanism 170 to the downstream end 36Z of the facing roll 36 is, for example, 230 mm or more and 260 mm or less.
- the diameter of the opposing roll 36 is, for example, 285 mm.
- the distance L2 from the secondary transfer position NT to the downstream end portion 36Z of the opposed roll 36 is set to 140 mm as an example.
- the distance L3 from the upstream end of the heating portion 102 (upstream end of the heating region) to the downstream end 36Z of the opposing roll 36 may be longer than the maximum paper length of 680 mm. If the paper P is in contact with the facing roll 36 when the paper P is burned in the heating unit 102, the facing roll 36 may burn, but in this configuration, burning is avoided.
- At least the upstream end of the upper surface of the ventilation mechanism 170 (the upper surface of the ventilation plate 180 in the present embodiment) or the upper surface of the ventilation mechanism 170 (the upper surface of the ventilation plate 180 in the present embodiment) and at least the upstream end of the ventilation region thereof. Is located below the upper end of the opposing roll 36 in the direction of gravity.
- the upstream end 170Z of the blower mechanism 170 and the upstream end 170X of the blower region are arranged between the separation position 36X and the holding position 66X shown in FIG. 3, and the rear end of the paper P is arranged. It may be configured to start blowing air after being separated from the facing roll 36 and before coming into contact with the blowing mechanism 170 (blower 160 or ventilation plate 180). The contact of the paper P with the blower mechanism 170 occurs when the paper P hangs down.
- This configuration may be executed, for example, by starting blowing air at the timing when the rear end of the paper P is detected by the sensor arranged downstream of the separation position 36X, or the sensor arranged at a predetermined position. It may be executed by starting the ventilation after a predetermined time has elapsed from the time when it is detected by. The predetermined time is measured by a timer or the like.
- the paper P may be separated from the facing roll 36, before the rear end of the paper P falls between the upstream end portion 170Z of the blowing mechanism 170 and the facing roll 36 below the upper surface of the blowing mechanism 170 in the direction of gravity.
- it may be configured to start blowing air. Also in this configuration, for example, it may be executed by starting blowing air at the timing when the rear end of the paper P is detected by the sensor arranged downstream of the separation position 36X, or it may be executed at a predetermined position. It may be executed by starting the ventilation after a predetermined time has elapsed from the time when the sensor detects it. The predetermined time is measured by a timer or the like.
- the reflector 104 and the heat insulating cover are integrated. Further, the upstream end 170Z of the blower mechanism 170 and the upstream end 170X of the blower region are located on the upstream side of the heating unit 102, and the blower mechanism 170 and its blower region upstream of the reflector 104 and the heat insulating cover. Exists.
- the paper P may burn. Further, the contact of the paper P may cause the toner image to be distorted.
- the blower mechanism 170 and its blower region exist upstream of the reflector 104 and the heat insulating cover, the paper P is non-contact and stable before passing through the reflector 104 and the heat insulating cover. Support for P is done.
- the ventilation mechanism 170 and its ventilation region also exist downstream of the reflector 104 and the heat insulating cover. Therefore, after the paper P has passed through the reflector 104 and the heat insulating cover, the paper P is stably supported until it is conveyed to the fixing unit 120.
- the reflector 104 and the heat insulating cover may be formed separately.
- the paper P sent out from the accommodating portion 50 shown in FIG. 1 is conveyed by a plurality of conveying rolls 64 and delivered to the chain gripper 66.
- the paper P delivered to the chain gripper 66 is conveyed to the secondary transfer position NT by the chain gripper 66 with the front end held by the gripper 76, and the toner image is transferred from the transfer belt 31 to the surface PA. ..
- the paper P on which the toner image is transferred is conveyed by the chain gripper 66 with the surface PA facing the heater 106 of the heating unit 102, and the toner image is heated.
- the paper P whose toner image is heated by the heating unit 102 is further conveyed to the fixing unit 120 by the chain gripper 66, sandwiched between the heating roll 130 and the pressure roll 140, and pressurized and heated. As a result, the toner image is fixed on the paper P.
- the paper P on which the toner image is fixed is cooled by the cooling roll 92 of the cooling unit 90 shown in FIG. 1 and then discharged to the discharge unit 52.
- the back surface PB of the paper P whose rear end is separated from the facing roll 36 by the transfer by the chain gripper 66 is supported from before the separation by the blowing by the blowing mechanism 170. That is, the blower mechanism 170 starts supporting the back surface PB of the paper P by blowing before the rear end of the paper P separates from the facing roll 36.
- the back surface of the paper P is supported in the configuration in which the back surface PB of the paper P whose rear end is separated from the facing roll 36 by the transfer by the chain gripper 66 is supported after the separation by the blowing by the blowing mechanism 170 (hereinafter referred to as the configuration A), the back surface of the paper P is supported. Only the front end portion of the paper P is held by the chain gripper 66 from the time when the end is separated from the facing roll 36 until the end is supported by the blower mechanism 170. Therefore, the paper P may flutter. In particular, when the paper P is thin paper, it tends to hang down and flutter more easily than thick paper.
- the unfixed image of the toner which is an example of the powder
- the unfixed image forms an image. Since it is easy to come into contact with other members in the apparatus 10 and vibration due to fluttering is likely to occur, the unfixed toner image may be distorted, or the paper P may be scratched or broken. Further, when the paper P flutters, it becomes easy to come into contact with the heating unit 102, so that not only the toner image on the surface of the paper P is distorted, but also the paper P may burn.
- the fluttering of the paper P is suppressed as compared with the configuration A.
- the distortion of the toner image and the contact of the paper P with the heating unit 102 are suppressed.
- the blowing mechanism 170 starts supporting the back surface PB by blowing before the rear end of the paper P finishes passing through the secondary transfer position NT. That is, in the present embodiment, the back surface PB is started to be supported from the state where the paper P is sandwiched between the facing roll 36 and the transfer belt 31. Therefore, the fluttering of the paper P is suppressed as compared with the configuration in which the blowing mechanism 170 starts supporting the back surface PB by blowing after the rear end of the paper P has passed through the secondary transfer position NT.
- the blower mechanism 170 supports the back surface PB on the rear end side of the holding position where the chain gripper 66 holds the paper P. Therefore, the fluttering of the paper P is suppressed as compared with the configuration in which the blower mechanism 170 supports the back surface PB at the same position as the holding position where the chain gripper 66 holds the paper P.
- the blower mechanism 170 supports the back surface PB of the paper P in a non-contact manner, the blower mechanism 170 supports the recording medium in contact with the back surface PB of the paper P, and the blower mechanism 170 supports the chain gripper 66. Interference with is suppressed.
- the degree of freedom of the material used as the recording medium is higher than that of the configuration in which the back surface PB of the paper P is supported by magnetic force or electrostatic force in a non-contact manner. ..
- the blower 160 blows air to the back surface PB of the paper P conveyed by the chain gripper 66, so that the blower 160 is made of the paper P.
- the non-contact state is maintained so that the paper P is conveyed in the non-contact state of the back surface PB in the image region GR.
- the paper P is used.
- the component for example, the ventilation plate 180
- the paper P is heated by the component and the toner is melted.
- the degree of melting of the toner varies between the initial operation of the fixing device 100 and the continuous operation of the fixing device 100. Therefore, it is necessary to change the heating temperature of the heating unit 102 and the heating roll 130 between the initial operation of the fixing device 100 and the continuous operation of the fixing device 100, which complicates the control of the heating temperature.
- the blower 160 maintains the non-contact state so that the paper P is conveyed in the non-contact state with the back surface PB in the image region GR of the paper P in the non-contact state.
- the back surface PB of the paper P is not heated, and the influence of heat (for example, conduction heat) received from the back surface PB of the paper P is reduced.
- the control of the heating temperature of the heating unit 102 and the heating roll 130 is suppressed from becoming complicated, and the toner on the back surface PB of the paper P during double-sided printing melts due to the influence of heat, while the back surface PB of the paper P melts. It is possible to prevent the toner image from being distorted by coming into contact with the blower mechanism 170.
- the back surface PB of the paper P is heated even when the paper P having the fixed toner image on the back surface PB is conveyed by the chain gripper 66 in the heating unit 102.
- melting of the fixed toner image is suppressed.
- the paper P having the fixed toner image on the back surface PB passes through the heating unit 102 for the purpose of suppressing melting of the fixed toner image when forming an image on both sides of the paper P.
- the transport unit and the blower unit are controlled so that the back surface PB is in a non-contact state. If the back surface PB of the paper P does not have a fixed toner image and only the front surface PA has an unfixed toner image, the ventilation plate 180 or the like is always in contact with the back surface PB to convey the toner. You may.
- the blower 160 blows air to the back surface PB of the paper P conveyed by the chain gripper 66 through the ventilation plate 180 having a plurality of ventilation holes 182 formed therein. Therefore, as compared with the configuration (second configuration) in which the air blown from the blower 160 directly hits the back surface PB of the paper P without passing through the ventilation hole 182, it is suppressed that the air hits the back surface PB of the paper P unevenly. Will be done. As a result, the posture of the paper P is less likely to change as compared with the second configuration described above.
- the gripper 76 holding the front end side of the paper P passes between the pressure roll 140 and the heating roll 130, the gripper 76 is placed in the recess 148. Get in. Therefore, the gripper 76 is less likely to get in the way when the paper P is pressed, as compared with the configuration in which the paper P is pressed between the pressure roll 140 and the heating roll 130 in which the recess 148 is not formed.
- the recess 148 faces the heating roll 130 by rotating the heating roll 130 and the pressure roll 140 in a state where the abutting portion 149 shown in FIG. 6 abuts against the abutting portion 139. Even in this state, the distance between the shafts of the heating roll 130 and the pressure roll 140 is maintained. Therefore, the fluctuation of the pressure for pressing the paper P is suppressed as compared with the configuration in which the paper P is pressed between the pressure roll 140 and the heating roll 130 in which the distance between the shafts is not maintained.
- the gripper 76 arranged on the downstream side in the transport direction with respect to the paper P holds the front end portion of the paper P from the downstream side in the transport direction of the paper P, but this is limited to this. I can't.
- a gripper 761 which is arranged on the side end sides of both sides of the paper P and holds the front end side portion of the paper P from the side end side with respect to the paper P may be used. ..
- paper P is used as an example of the recording medium, but the present invention is not limited to this.
- a film or the like may be used, and as an example of the recording medium, a sheet material formed in a sheet shape (paper shape, film shape) other than the paper P may be used.
- the image forming unit 12 has a configuration having a transfer belt 31 as an intermediate transfer body, but the present invention is not limited to this.
- a direct transfer type image forming unit may be used.
- an inkjet type image forming unit that forms an image by ejecting ink onto the paper P may be used.
- the carrier is the facing roll 36 of the transfer unit 35, but the transport body is not limited to this.
- the facing roll 36 may be a support roll or a support block that supports the back surface PB of the paper P conveyed from the transfer unit 35. At that time, it is better that the support roll is arranged at a position that supports the paper P with the paper P sandwiched between the transfer portions 35. Further, it is preferable that the surface of the paper P does not come into contact with other members between the transfer unit 35 and the heating unit 102, or between the transfer unit 35 and the fixing unit 120.
- the separation position 36X is located on the downstream side with respect to the secondary transfer position NT, but the present invention is not limited to this.
- the separation position 36X may be located at the downstream end of the secondary transfer position NT. That is, when the rear end of the paper P finishes passing through the secondary transfer position NT, the rear end of the paper P may be separated from the facing roll 36.
- the secondary transfer position NT (sandwiching position) does not exist, and the paper P is arranged on the outer peripheral surface of the facing roll 36. After that, the rear end is separated from the facing roll 36 without being pinched.
- the blower mechanism 170 has a blower 160 and a ventilation plate 180, but the present invention is not limited to this.
- the blower mechanism 170 may be configured to have only the blower 160 without the vent plate 180.
- the blowing mechanism 170 has started to support the back surface PB by blowing before the rear end of the paper P has passed through the secondary transfer position NT, but the present invention is not limited to this. If the rear end of the paper P is before the rear end of the paper P is separated from the facing roll 36, the blower mechanism 170 may start supporting the back surface PB by blowing after the rear end of the paper P has passed through the secondary transfer position NT. good. Alternatively, the air may be started before the paper P enters the secondary transfer position NT during the image formation, or the air may be constantly blown during the image formation.
- the blower mechanism 170 supports the back surface PB on the rear end side of the holding position where the chain gripper 66 holds the paper P, but the present invention is not limited to this.
- the blower mechanism 170 has the back surface PB at the same position as the holding position where the chain gripper 66 holds the paper P. It may be configured to support.
- the blower mechanism 170 supports the back surface PB of the paper P in a non-contact manner, but the present invention is not limited to this.
- the configuration may be such that the back surface PB of the paper P is contacted to support the recording medium.
- the back surface PB of the paper P is supported by blowing air, but the present invention is not limited to this.
- the back surface PB of the paper P may be supported in a non-contact manner by a magnetic force or an electrostatic force.
- the blower 160 blows air to the back surface PB of the paper P in the thickness direction of the paper P, but the present invention is not limited to this.
- the blower 160 may blow air diagonally with respect to the thickness direction of the paper P.
- the blower 160 is configured to blow air diagonally (to the upper right in FIG. 3) toward the upstream side in the transport direction of the paper P with respect to the back surface PB of the paper P.
- the blower 160 may be arranged outside the width direction of the paper P, and air may be blown from the side edges on both sides of the paper P to the back surface PB of the paper P. ..
- the configuration may be such that air is supplied to the back surface PB of the paper P so that the paper P floats.
- air is supplied only to the back surface PB of the paper P, but the present invention is not limited to this.
- air is supplied to the surface PA of the paper P, it is acceptable from the following viewpoints.
- the example shown in FIG. 9 is a modification 1 in which air is supplied to the surface PA from the viewpoint of stable transportation of the paper P.
- a blower 190 is arranged so as to face the surface PA side of the paper P and for supplying air to the surface PA.
- the posture of the paper P is kept parallel to the transport direction.
- the air volume of the blower 190 is set to be smaller than the air volume of the blower 160, and the toner is not scattered by the air from the blower 190.
- the blower 200 is provided so as to face the direction orthogonal to the blowing direction of the blower 160 in order to ventilate the air around the heating unit 102. That is, the blower port of the blower 200 is opened in the direction along the surface PA of the paper P, and is provided so as not to face the surface PA of the paper P. Then, the air blown from the blower 200 flows in the direction along the surface PA of the paper P, and the air from the blower 200 may be supplied to the surface PA of the paper P. In this case as well, it is desirable that the air volume is set to such an extent that the toner does not scatter as in the modified example 1.
- the blower 160 has been described by using a form in which air is blown to the back surface PB of the paper P in the thickness direction of the paper P. If there is no recording medium between the heating unit 102 and the blower 160 and the air is blown by the blower 160, the warm air around the heating unit 102 may be diffused into the apparatus. As such a measure, if the blower 160 is set to blow air at the timing when the recording medium faces the blower 160, the blown air is blocked by the recording medium. In other words, by weakening or stopping the air blow between the preceding recording medium and the succeeding recording medium, the air from the blower 160 supplied to the heating unit 102 is reduced, and as a result, the warmed air is used. Is prevented from being diffused in the device. In this way, the drive control of the blower 160 may be performed, or the plurality of blower 160s may be individually driven and controlled.
- Image forming device 12 Image forming unit 36 Opposing roll (an example of a carrier) 66 Chain gripper (an example of a transport unit) 170 Blower mechanism (an example of a support part, an example of a blower part) NT Secondary transfer position NT (an example of image formation position) P paper (an example of recording medium) PA surface (an example of one side) Back side of PB (an example of the other side)
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Paper Feeding For Electrophotography (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
- Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
Abstract
Description
図2は、本実施形態に係るトナー像形成部の構成を示す概略図である。
図3は、本実施形態に係る定着装置の構成を示す概略図である。
図4は、本実施形態に係る定着装置の構成を示す平面図である。
図5は、本実施形態に係る定着ユニットの一部を拡大して示す概略図である。
図6は、本実施形態に係る定着ユニットを示す平面図である。
図7は、チェーングリッパの変形例を示す斜視図である。
図8は、送風機の変形例を示す側面図である。
図9は、変形例1の構成を示す概略図である。
図10は、変形例2の構成を示す概略図である。
本実施形態に係る画像形成装置10の構成を説明する。図1は、本実施形態に係る画像形成装置10の構成を示す概略図である。
図1に示される収容部50は、用紙Pを収容する機能を有している。画像形成装置10では、収容部50は、複数(例えば2つ)が備えられている。この複数の収容部50から選択的に用紙Pが送り出される構成とされている。記録媒体の一例としての用紙Pとしては、予め定められた大きさ(サイズ)とされた枚葉紙(カット紙)が用いられる。また、用紙Pは、一方の面の一例としての表面PA(図5参照)と、他方の面の一例としての裏面PB(図5参照)と、を有している。用紙Pの表面PAは、トナー像が転写される画像領域GR(図4参照)、すなわち、未定着画像が形成される画像領域GRを有している。
図1に示される排出部52は、画像が形成された用紙Pが排出される部分である。具体的には、定着装置100で画像が定着された後に、冷却部90で冷却された用紙Pが排出部52に排出される構成とされている。
図1に示される画像形成部12は、記録媒体の一方の面に画像を形成する画像形成部の一例である。具体的には、画像形成部12は、電子写真方式により用紙Pの表面PAにトナー像を形成する機能を有している。さらに具体的には、画像形成部12は、図1に示されるように、トナー像を形成するトナー像形成部20と、トナー像形成部20で形成されたトナー像を用紙Pに転写する転写装置30と、を有している。対向ロール36(もしくは、転写胴、転写体と呼ぶ)は、搬送体の一例である。なお、対向ロール36の構成については、転写装置30の構成と共に説明する。
トナー像形成部20は、色ごとにトナー像を形成するように複数備えられている。画像形成装置10では、イエロー(Y)、マゼンタ(M)、シアン(C)、ブラック(K)の計4色のトナー像形成部20が備えられている。図1に示す(Y)、(M)、(C)、(K)は、上記各色に対応する構成部分を示している。
図1に示される転写装置30は、各色の感光体ドラム21のトナー像を、中間転写体に重畳して一次転写し、該重畳されたトナー像を用紙Pに二次転写する機能を有している。具体的には、転写装置30は、図1に示されるように、中間転写体としての転写ベルト31と、一次転写ロール33と、二次転写部34と、を備えている。
図1に示される搬送機構60は、用紙Pを搬送する機構である。具体的には、搬送機構60は、収容部50に収容された用紙Pを搬送し、二次転写位置NTを通過させる機能を有している。さらに、搬送機構60は、二次転写位置NTから後述の定着ユニット120(後述の加熱ロール130及び加圧ロール140)へ用紙Pを搬送する機能を有している。換言すれば、搬送機構60は、トナー像が転写された用紙Pを定着装置100において搬送する機能を有している。
図1に示される反転機構80は、定着装置によって画像が定着された記録媒体の表裏を反転させる反転機構の一例である。具体的には、反転機構80は、定着装置100によってトナー像が定着された用紙Pの表裏を反転させる機構である。さらに具体的には、反転機構80は、図1に示されるように、複数(例えば、2つ)の搬送ロール82と、反転装置84、複数(例えば、7つ)の搬送ロール86と、有している。
図3に示される定着装置100は、画像形成部によって形成された画像を記録媒体に定着させる定着装置の一例である。具体的には、定着装置100は、転写装置30で転写されたトナー像を用紙Pへ定着する装置である。
図3に示される加熱部102は、記録媒体の表面を非接触で加熱する加熱部の一例である。具体的には、加熱部102は、チェーングリッパ66で搬送される用紙Pの表面PAを非接触で加熱する機能を有している。
反射板104は、ヒータ106からの赤外線を装置下側(チェーングリッパ66によって搬送される用紙P側)へ反射する機能を有している。反射板104は、例えばアルミニウム板等の金属板を用いて形成されている。反射板104は、装置下側が開放された箱状に形成されている。
ヒータ106は、装置前後方向に長さを有する円柱状の赤外線ヒータである。ヒータ106は、反射板104の内部に装置幅方向に沿って、複数(例えば、40本)並べられている。ヒータ106は、具体的には、カーボンフィラメント109と、内部にカーボンフィラメント109が収容された円筒状の石英管108と、を備えて構成されている。石英管108の表面には、黒色の赤外線放射膜が形成されている。このように、石英管108の表面に黒色の赤外線放射膜が形成されていることで、例えば、白膜が形成されている場合と比して、ヒータ106は、赤外線を効率よく放射するようになっている。ここで、本実施形態において、黒色とは、無彩色点(x=0.333,y=0.333、Y=0)からの色度のズレが色差ΔEで100以内である色である。なお、図3では、ヒータ106の具体的な構成を示すため、加熱部102の左上側にヒータ106を拡大して示している。また、本実施例における赤外線ヒータ106は、赤外線の放射波長の波長ピークが、2〔μm〕以上5〔μm〕以下に設定されており、いわゆる遠赤外線の領域である。そして加熱部102のヒータ106の表面温度は、300〔℃〕以上1175〔℃〕以下の予め定められた温度とされている。さらに、本実施形態では反射板104の装置幅方向の長さが1〔m〕に対し、遠赤外線を効率よく放射するヒータ106を装置幅方向に20本以上100本以下の密度で並べることで、良好な加熱分布が得られている。
金網112は、反射板104の下側の開口における縁部に固定されている。これにより、金網112は、反射板104の内部と、反射板104の外部とを仕切っている。そして、金網112は、チェーングリッパ66によって搬送される用紙Pとヒータ106とが接触するのを防止している。
図3に示されるチェーングリッパ66は、加熱部に記録媒体の表面を対向させながら記録媒体を搬送する搬送部の一例である。チェーングリッパ66に備えられたグリッパ76は、少なくとも記録媒体の前端側を保持する保持部の一例である。なお、記録媒体の前端側とは、記録媒体における搬送方向の中央より下流側(前側)の部分である。
図3に示される定着ユニット120は、用紙Pの画像を用紙Pに定着する定着部である。具体的には、定着ユニット120は、用紙Pに接触して用紙Pを加熱及び加圧することで、トナー像を用紙Pに定着する機能を有している。本実施の形態では、加熱及び加圧を行う加熱部102を用いて説明するが、加熱は必ずしも必要でなく、前工程の加熱部102で溶融したトナーの表面性の向上、例えばグロスの調整を目的とすれば、加圧部による加圧が行われる形態のみでも適用可能である。
図3に示される加熱ロール130は、加熱部に対する搬送方向下流側に配置され、記録媒体を加熱する加熱部材の一例である。具体的には、加熱ロール130は、加熱部102に対する搬送方向下流側に配置され、用紙Pに接触して用紙Pを加熱する機能を有している。この加熱ロール130は、用紙Pの表面PAに接触するように、装置前後方向を軸方向として配置されている。
図3に示される従動ロール150は、加熱ロール130の外周面における用紙Pに対する接触領域以外の領域に接触するように、装置前後方向を軸方向として配置されている。また、従動ロール150は、円筒状の基材152と、基材152の内部に収容されたヒータ154(加熱源)と、を有している。この従動ロール150は、加熱ロール130に従動して回転し、加熱ロール130を加熱する。加熱ロール130が従動ロール150によって加熱されること、及び加熱ロール130自身がヒータ138を有していることで、加熱ロール130の表面温度は、予め定められた温度となる。
図3に示される加圧ロール140は、加熱ロールとの間で記録媒体を加圧し、保持部が入り込む凹部が外周面に形成された加圧部材の一例である。具体的には、加圧ロール140は、加熱ロール130との間に用紙Pを挟んで用紙Pを加圧する機能を有している。この加圧ロール140は、加熱ロール130の下側に装置前後方向を軸方向として配置されている。
図3に示される送風機構170は、支持部の一例であり、送風部の一例でもある。この送風機構170は、用紙Pの裏面PBに空気を送風する機構である。具体的には、送風機構170は、送風機160と、通気板180と、を有している。
図3に示される送風機160は、用紙Pの裏面PBへ向けて空気を送風する機器である。この送風機160は、装置前後方向に見てチェーン72の内側(内周側)であって、加熱部102の下側に複数が配置されている。複数の送風機160は、図3及び図4に示されるように、用紙Pの搬送方向及び装置前後方向に沿って、二次元状(マトリックス状)に配置されている。なお、図4では、送風機160の図示を簡略化するため、一部の送風機160の羽根を省略している。
図3に示される通気板180は、送風部から記録媒体の裏面へ向けて送風される空気を通過させる複数の通気穴を有する通気部の一例である。具体的には、通気板180は、送風機160から用紙Pの裏面PBへ向けて送風される空気を通過させる複数の通気穴182が形成されたプレートで構成されている。
送風機構170では、図3に示されるように、送風機160及び通気板180により設定される送風領域の上流端部170Xは、二次転写位置NTと図3に示される保持位置66Xとの間に配置されている。具体的には、該上流端部170Xは、二次転写位置NTに対する下流側であって、保持位置66Xに対する上流側に配置されている。
冷却部90は、図1に示されるように、用紙Pの搬送方向において、定着ユニット120の下流側に配置されている。また、冷却部90は、装置幅方向に並んでいる複数(例えば2つ)の冷却ロール92を備えている。
画像形成装置10で用いられる用紙Pの搬送方向長さは、一例として、570mm以上680mm以下とされる。また、チェーン72の周方向に沿って複数配置されたグリッパ76間の該周方向(搬送方向)に沿った距離は、一例として、840mmとされる。また、該複数のグリッパ76の各々に保持された用紙Pの間の該周方向(搬送方向)に沿った距離は、一例として、160mm以上270mm以下とされる。
図1に示される収容部50から送り出された用紙Pは、複数の搬送ロール64で搬送され、チェーングリッパ66へ受け渡される。チェーングリッパ66へ受け渡された用紙Pは、チェーングリッパ66によって、グリッパ76で前端部が保持された状態で二次転写位置NTへ搬送され、転写ベルト31からトナー像が表面PAに転写される。トナー像が転写された用紙Pは、図3に示されるように、チェーングリッパ66によって、加熱部102のヒータ106に表面PAが対向した状態で搬送され、トナー像が加熱される。
本実施形態では、チェーングリッパ66では、用紙Pに対する搬送方向の下流側に配置されたグリッパ76が、用紙Pの搬送方向の下流側から用紙Pの前端部を保持していたが、これに限られない。保持部の一例としては、図7に示されるように、用紙Pの両側の側端側に配置され、用紙Pに対する側端側から用紙Pの前端側部分を保持するグリッパ761を用いてもよい。
本実施形態では、記録媒体の一例として用紙Pを用いたが、これに限られない。記録媒体の一例としては、例えばフィルムなどであってもよく、記録媒体の一例として、用紙P以外の、シート状(紙状、膜状)に形成されたシート材を用いてもよい。
本出願は、2020年9月16日出願の日本特許出願である特願2020-155743に基づくものであり、それらの内容はここに参照として取り込まれる。
12 画像形成部
36 対向ロール(搬送体の一例)
66 チェーングリッパ(搬送部の一例)
170 送風機構(支持部の一例、送風部の一例)
NT 二次転写位置NT(画像形成位置の一例)
P 用紙(記録媒体の一例)
PA 表面(一方の面の一例)
PB 裏面(他方の面の一例)
Claims (5)
- 記録媒体の一方の面に画像形成位置で画像を形成する画像形成部と、
前記記録媒体の前端側を保持した状態で該記録媒体を搬送し、前記画像形成位置を通過させる搬送部と、
前記画像形成部によって画像が形成される記録媒体の他方の面を支持しながら、該記録媒体を前記搬送部と共に搬送する搬送体と、
前記搬送部による搬送によって前記搬送体から離間した記録媒体の前記他方の面を、離間前から支持する支持部と、
を備える画像形成装置。 - 前記搬送体は、前記記録媒体を前記画像形成部とで挟み込んだ状態で搬送し、
前記支持部は、前記搬送体と前記画像形成部との挟込位置を前記記録媒体の後端が通過し終える前に、前記他方の面の支持を開始する
請求項1に記載の画像形成装置。 - 前記支持部は、前記搬送部が前記記録媒体の前端側を保持した保持位置よりも後端側で前記他方の面を支持する
請求項1又は2に記載の画像形成装置。 - 前記支持部は、非接触で前記他方の面を支持する
請求項1~3のいずれか1項に記載の画像形成装置。 - 前記支持部は、前記他方の面に対して空気を送風する送風部である
請求項4に記載の画像形成装置。
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Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002148973A (ja) | 2000-11-10 | 2002-05-22 | Ricoh Co Ltd | 画像形成装置 |
JP2003195586A (ja) * | 2001-12-27 | 2003-07-09 | Canon Inc | 画像形成装置 |
JP2008070554A (ja) * | 2006-09-13 | 2008-03-27 | Katsuragawa Electric Co Ltd | 画像形成装置 |
JP2011175064A (ja) * | 2010-02-24 | 2011-09-08 | Seiko Epson Corp | 画像形成装置および画像形成方法 |
JP2013107760A (ja) * | 2011-11-22 | 2013-06-06 | Mitsubishi Heavy Industries Printing & Packaging Machinery Ltd | 見当装置および電子写真印刷装置 |
US20180264725A1 (en) * | 2017-03-17 | 2018-09-20 | Impossible Objects, Inc. | Method and apparatus for platen module for automated composite-based additive manufacturing machine |
JP2020134929A (ja) * | 2019-02-13 | 2020-08-31 | 富士ゼロックス株式会社 | 画像形成装置 |
JP2020155743A (ja) | 2019-03-22 | 2020-09-24 | 株式会社タムラ製作所 | リアクトル |
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2024
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Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002148973A (ja) | 2000-11-10 | 2002-05-22 | Ricoh Co Ltd | 画像形成装置 |
JP2003195586A (ja) * | 2001-12-27 | 2003-07-09 | Canon Inc | 画像形成装置 |
JP2008070554A (ja) * | 2006-09-13 | 2008-03-27 | Katsuragawa Electric Co Ltd | 画像形成装置 |
JP2011175064A (ja) * | 2010-02-24 | 2011-09-08 | Seiko Epson Corp | 画像形成装置および画像形成方法 |
JP2013107760A (ja) * | 2011-11-22 | 2013-06-06 | Mitsubishi Heavy Industries Printing & Packaging Machinery Ltd | 見当装置および電子写真印刷装置 |
US20180264725A1 (en) * | 2017-03-17 | 2018-09-20 | Impossible Objects, Inc. | Method and apparatus for platen module for automated composite-based additive manufacturing machine |
JP2020134929A (ja) * | 2019-02-13 | 2020-08-31 | 富士ゼロックス株式会社 | 画像形成装置 |
JP2020155743A (ja) | 2019-03-22 | 2020-09-24 | 株式会社タムラ製作所 | リアクトル |
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