JP2009198623A - Image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image forming device which does not cause image degradation or generate noises by a fan, etc. with a simple structure and which restrains temperature rising of a rotated body, such as a photoreceptor, a transfer roller, or a conveyance roller. <P>SOLUTION: This image forming device comprises a development part which develops an electrostatic latent image of the photoreceptor, a transfer part which transfers in paper a toner image formed on the photoreceptor, a transport path for transporting the paper to the transfer part, a fixing part which heats and presses the paper on which the toner image is formed, a rotated body 60 which is provided to the development part, the transfer part, the transport path or the fixing part and which rotates and forms an image or transports the paper, and a rotation shaft 61 which rotates the rotated body 60. A heat dissipating coating material is applied to the rotation shaft 61. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image forming apparatus such as a copying machine, a printer, a facsimile, or a composite machine using an electrophotographic system.

  Conventionally, in an inkjet method as an image forming method on a paper, an ink jet recording head having a plurality of nozzles is arranged facing a transfer drum, and an ink image is written on the transfer drum by the ink jet recording head to transfer the paper. The ink image is transferred onto the paper by being brought into contact with the drum and pressing the paper against the transfer drum by a transfer roller from behind the paper. Here, a heater is provided inside the transfer drum so that the transfer drum is kept at a high temperature and the solvent content is removed from the ink image prior to the transfer from the ink image on the transfer drum to the paper.

  However, the ink jet recording head is disposed in the vicinity of the transfer drum and is affected by the temperature of the transfer drum. There is a problem in that the viscosity of the ink is increased and solidified at the nozzle portion of the ink jet recording head disposed in the vicinity of the ink jet recording head, and ink droplets cannot be ejected from the nozzle portion, resulting in malfunction.

  Therefore, in Patent Document 1, the peripheral surface layer of the transfer drum is configured by laminating a heat-resistant rubber such as silicone rubber, and a black pigment is kneaded into the silicone rubber, whereby a black surface is formed on the peripheral surface of the transfer drum. Even if the heat transfer surface is formed and the transfer drum is heated to a high temperature, the heat is quickly dissipated and the temperature is lowered when the transfer drum is not heated.

  However, in the above-described prior art, since the pigment is kneaded into the transfer drum in order to form the peripheral surface of the transfer drum in black, the transfer efficiency of transferring the ink image from the transfer drum to the paper is reduced, and the paper There was a disadvantage that the transferred image was deteriorated.

  In Patent Document 2, in an electrophotographic system, toner is supplied from a developing unit to a photosensitive member, a toner image is formed from an electrostatic latent image on the photosensitive member, and the toner image is transferred to a sheet and transferred. The toner image is fixed on the paper. In the developing device, heat is generated at the stirring of the toner by the stirring screw, the sliding portion between the stirring screw and the developing roller, and the temperature of the toner supplied to the photoreceptor rises. In order to suppress the temperature rise of the toner, the developing device and a fan for taking in air outside the apparatus are connected by a tube so that the air taken in from the fan flows along the outer surface of the developing device. Is cooling.

  However, in the above-described prior art, since the fan is attached to the apparatus and the fan and the developing device are connected by a tube, the apparatus has a complicated configuration, and the driving sound of the fan becomes noise.

JP-A-6-166177 (paragraphs [0015]-[0017], FIG. 1) JP 2007-41562 A (paragraphs [0026] to [0029], FIG. 3)

  The present invention has been made in order to solve the above-described problems, and has a simple configuration and does not generate image degradation or noise due to a fan or the like, and a rotated body such as a photosensitive member, a transfer roller, or a conveyance roller. An object of the present invention is to provide an image forming apparatus that suppresses the temperature of the toner from becoming high.

To achieve the above object, the present invention provides a developing unit for developing an electrostatic latent image on a photoconductor, a transfer unit for transferring a toner image formed on the photoconductor to a sheet, and conveying the sheet to the transfer unit. And a fixing unit that heats and pressurizes the paper on which the toner image is formed, and is provided in the developing unit, the transfer unit, the transporting unit, or the fixing unit, and rotates to form an image or transport the paper. In an image forming apparatus provided with a rotated body that performs the rotation and a rotating member that rotates the rotated body,
A heat radiation paint is applied to the rotating member.

  According to this configuration, in the developing unit and the transfer unit, the rotating body on which image formation is performed becomes high temperature due to heat generated during image formation. In addition, when the paper is heated by heat generated when the toner image is transferred to the paper by the transfer unit or when the toner image is fixed to the paper by the fixing unit, the heat is conducted from the paper to the rotated body of the transport unit. Is done. The heat of the rotated body is conducted from the rotated body to the rotating member to which the thermal radiation paint is applied, and the temperature of the rotated body is lowered.

  According to a second aspect of the present invention, the rotating member includes a rotating shaft that holds a rotated body, and the thermal radiation paint is applied to an end of the rotating shaft. According to this configuration, when the rotating shaft rotates, the heat of the rotating shaft diverges from the circumferential surface of the rotating shaft and becomes a rotating flow rotating in the same direction as the rotating shaft by the rotating force of the rotating shaft. Due to the force, a radial flow is generated in the radial direction of the shaft, and the heat of the rotating body is conducted along the wind, and is radiated from the end of the rotating shaft to which the thermal radiation coating is applied.

  According to a third aspect of the present invention, a heat radiating member is provided at an end of the rotating shaft, and the thermal radiation paint is applied to the end of the rotating shaft and the heat radiating member. Yes. According to this configuration, the efficiency of radiating heat from the end of the rotating shaft is improved by the radiation member provided at the end of the rotating shaft.

  The invention according to claim 4 is characterized in that the heat dissipating member is a fin formed on a peripheral surface of the rotating shaft. According to this configuration, when the rotating shaft rotates, a wind flow is generated around the rotating shaft by the fins, and the heat of the rotated body is conducted along with the wind flow, and the rotating shaft to which the heat radiation coating is applied. Heat is radiated from the end.

  The invention according to claim 5 is characterized in that the heat dissipating member is a fin spirally formed on the peripheral surface of the rotating shaft. According to this configuration, when the rotating shaft rotates, a wind flow along the axial direction occurs around the rotating shaft due to the helical shape of the fin, and the heat of the rotated body is conducted along with the wind flow, Heat is radiated from the end of the rotating shaft to which the radiation paint is applied.

  The invention according to claim 6 is characterized in that the heat dissipating member is a fin formed side by side in the circumferential direction on the peripheral surface of the rotating shaft. According to this configuration, when the rotating shaft rotates, a wind flow toward the circumferential direction of the rotating shaft is generated around the rotating shaft by the rotating fin, and the heat of the rotated body is conducted along with the wind flow. Then, heat is radiated from the end of the rotating shaft to which the heat radiation paint is applied.

  According to the first aspect of the present invention, in the developing section and the transfer section, the rotating body that forms the image is heated by the heat generated during the image formation. In addition, when the paper is heated by the heat generated when the toner image is transferred to the paper by the transfer unit or when the toner image is fixed to the paper by the fixing unit, the heat is conducted from the paper to the rotated body of the transport unit. Is done. The heat of the rotated body is conducted from the rotated body to the rotating member to which the thermal radiation paint is applied, and the temperature of the rotated body is lowered. This eliminates the need for a fan or other members, has a simple structure, does not generate noise, and does not deteriorate images. The developing unit includes a photoconductor and a developing roller, the transfer unit includes a transfer roller, and the like. It can suppress that the to-be-rotated body of the conveyance part provided with the roller etc. becomes high temperature.

  According to the second aspect of the present invention, when the rotating shaft rotates, the heat of the rotating shaft diverges from the circumferential surface of the rotating shaft, and the rotating flow rotates in the same direction as the rotating shaft by the rotating force of the rotating shaft. Furthermore, due to the centrifugal force of the rotating shaft, it becomes a radiant flow in the radial direction, the heat of the rotated body is conducted along the wind, and is dissipated from the end of the rotating shaft to which the thermal radiation paint is applied. It can suppress that a to-be-rotated body becomes high temperature.

  According to the invention of claim 3, the radiation member provided at the end of the rotating shaft improves the efficiency of heat dissipation from the end of the rotating shaft and further suppresses the temperature of the rotated body from being increased. can do.

  According to the fourth aspect of the present invention, when the rotating shaft rotates, a wind flow is generated around the rotating shaft by the fins, and the heat of the rotated body is conducted along with the wind flow, thereby radiating heat. Since heat is radiated from the end of the rotating shaft to which the paint is applied, it is possible to prevent the rotated body from becoming high temperature.

  According to the fifth aspect of the present invention, when the rotating shaft rotates, a wind flow along the axial direction is generated around the rotating shaft due to the spiral shape of the fin, and along with the wind flow, Since heat is conducted and heat is radiated from the end of the rotating shaft to which the heat radiation coating is applied, it is possible to suppress the rotating body from becoming high temperature.

  According to the sixth aspect of the present invention, when the rotating shaft rotates, a wind flow is generated around the rotating shaft by the rotating fins in the circumferential direction of the rotating shaft, and the wind flow is covered along with the wind flow. Since the heat of the rotating body is conducted and radiated from the end of the rotating shaft to which the heat radiation paint is applied, it is possible to prevent the rotating body from becoming high temperature.

  Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to these embodiments. The embodiment of the present invention shows the most preferable form of the invention, and the use of the invention and the terms shown here are not limited thereto.

(First embodiment)
FIG. 1 is a cross-sectional front view schematically showing an internal configuration of an image forming apparatus according to an embodiment of the present invention. The image forming apparatus 1 is a tandem type color printer. As the photosensitive members 11a to 11d that are rotatable, an organic photosensitive member (OPC photosensitive member) is used as a photosensitive material for forming a photosensitive layer, and black (B), It is arranged corresponding to each color of yellow (Y), cyan (C) and magenta (M). The photosensitive layer may be amorphous silicon. Around the photoreceptors 11a to 11d, developing units 2a to 2d, an exposure unit 12, chargers 13a to 13d, and static eliminators 14a to 14d are disposed.

  The developing units 2a to 2d supply toner to the photoconductors 11a to 11d, and are disposed opposite to the lower right of the photoconductors 11a to 11d. The developing units 2a to 2d are provided with a developing roller, a magnetic roller, and a stirring roller. The developer stirred by the stirring roller is conveyed toward the developing roller as a magnetic brush by the rotation of the magnetic roller. When the developer contacts the developing roller, only the toner of the magnetic brush is supplied to the developing roller. When a developing bias is applied to the developing roller, the toner supplied onto the rotating developing roller flies to the photoconductors 11a to 11d, and the latent images on the photoconductors 11a to 11d are developed.

  The chargers 13a to 13d are disposed upstream of the developing units 2a to 2d in the direction of rotation of the photoconductor and face the surfaces of the photoconductors 11a to 11d, and the surfaces of the photoconductors 11a to 11d are uniformly formed prior to development. Further, the static eliminators 14a to 14d are arranged on the downstream side of the developing units 2a to 2d in the rotation direction of the photosensitive member and opposed to the surfaces of the photosensitive members 11a to 11d, and develop on the surfaces of the photosensitive members 11a to 11d. The remaining charge is removed.

  The exposure unit 12 scans and exposes each of the photoconductors 11a to 11d based on image data such as characters and patterns input to an image input unit (not shown) from a personal computer or the like. The developing unit 2a Is provided downstream of the chargers 13a to 13d in the rotation direction of the photosensitive member. The exposure unit 12 is provided with a laser light source and a polygon mirror, and a reflection mirror and a lens are provided corresponding to each of the photoreceptors 11a to 11d. Laser light emitted from the laser light source is applied to the surfaces of the photoconductors 11a to 11d via a polygon mirror, a reflection mirror, and a lens, and the surfaces of the photoconductors 11a to 11d are electrostatically applied to the surfaces of the photoconductors 11a to 11d. A latent image is formed. This electrostatic latent image is developed into a toner image by each of the developing units 2a to 2d.

  The intermediate transfer belt 17 is stretched around the tension roller 6, the driving roller 25, and the driven roller 27. The photoreceptors 11a to 11d are arranged below the intermediate transfer belt 17 so as to be in contact with the intermediate transfer belt 17 so as to be adjacent to each other from the upstream side in the transport direction (arrow direction in FIG. 1). . The primary transfer rollers 26a to 26d are arranged so as to face the photoreceptors 11a to 11d and contact the intermediate transfer belt 17 with the intermediate transfer belt 17 interposed therebetween, and are movable in the vertical direction in FIG. If necessary, a primary transfer nip portion is formed by being pressed against each of the photoreceptors 11a to 11d via the intermediate transfer belt 17, and is separated. In the primary transfer nip portion, the toner images formed by the photoconductors 11a to 11d are transferred to the surface of the intermediate transfer belt 17. The toner images on the photoconductors 11a to 11d are sequentially transferred to the intermediate transfer belt 17 at a predetermined timing along with the rotation of the intermediate transfer belt 17, whereby cyan, magenta, yellow, and black are transferred onto the surface of the intermediate transfer belt 17. A full color toner image is formed by superimposing the four color toner images. The belt cleaning 31 cleans the toner remaining on the intermediate transfer belt 17 after the transfer.

  The secondary transfer roller 34 is opposed to the driving roller 25 with the intermediate transfer belt 17 interposed therebetween, and presses against the intermediate transfer belt 17 to form a secondary transfer nip portion. In the secondary transfer nip portion, the intermediate transfer belt The toner image on the surface 17 is transferred to the paper P.

  A paper feed cassette 32 that stores paper P is disposed below the image forming apparatus 1, and a stack tray 35 that supplies manual paper is disposed in the middle of the image forming apparatus 1. On the left side of the image forming apparatus 1, a first transport path 33 for transporting the paper P fed from the paper feed cassette 32 to the secondary transfer nip formed by the intermediate transfer belt 17 is disposed. From the right part to the left part, a second transport path 36 for transporting the paper fed from the stack tray 35 to the secondary transfer nip part is provided. Further, in the upper left part of the image forming apparatus 1, a fixing unit 18 that performs a fixing process on the paper P on which an image is formed, and a third transport that transports the paper P on which the fixing process has been performed to the paper discharge unit 37. A path 39 is provided. Reversal that conveys the sheet so that the toner image can be secondarily transferred to the back side of the sheet by connecting the middle of the third conveyance path 39 to the middle of the first conveyance path 33 on the downstream side of the fixing unit 18 in the sheet conveyance direction. A conveyance path 40 is provided.

  The paper feed cassette 32 can be replenished by pulling it out of the apparatus (front side in FIG. 1), and the stored paper P is first fed one by one by the pick-up roller 33b and the separating roller 33a. It is fed out to the conveyance path 33 side.

  The first conveyance path 33 and the second conveyance path 36 are merged before the registration roller 33c, and the registration roller 33c takes the timing of the image forming operation and the paper feeding operation in the intermediate transfer belt 17 to form the sheet P. Is conveyed to the secondary transfer nip portion. The full-color toner image on the intermediate transfer belt 17 is secondarily transferred to the sheet P conveyed to the secondary transfer nip portion by the secondary transfer roller 34 to which a bias potential (a polarity opposite to the toner charging polarity) is applied. Then, it is conveyed to the fixing unit 18.

  The fixing unit 18 includes a fixing belt heated by a heater, a pressure roller disposed in pressure contact with the fixing belt, and the like, and performs fixing processing by heating and pressing the paper P on which the toner image is transferred. Do. After being fixed by the fixing unit 18, the sheet P is reversed by the reverse conveyance path 40 as necessary, and a full-color toner image is secondarily transferred to the back surface of the sheet by the secondary transfer roller 34. After being fixed, the paper passes through the third conveyance path 39 and is discharged to the paper discharge portion 37 by the discharge roller 19a.

  2A is a perspective view showing the photoconductor 11a according to the first embodiment of the present invention, and FIG. 2B is a view of FIG. Since the other photoconductors 11b to 11d have the same configuration, the photoconductor 11a will be described as a representative.

  As shown in FIG. 2A, the photoreceptor 11a includes a photoreceptor drum 60 as a body to be rotated, and a rotating shaft 61 that holds the photoreceptor drum 60 with three flanges 60a on the inner periphery of the photoreceptor drum 60. Is provided.

  The photosensitive drum 60 is an aluminum cylindrical drum, and a photosensitive layer is laminated on the peripheral surface thereof. When the photosensitive drum 60 rotates in the arrow direction S in FIG. 2A, the peripheral surface of the photosensitive drum 60 is charged by the charging unit 13a (see FIG. 1), and then from the exposure unit 12 (see FIG. 1). A latent image is formed on the peripheral surface by the laser beam, and when the toner is supplied from the developing unit 2a (see FIG. 1), the latent image is developed.

  The rotating shaft 61 holds the photosensitive drum 60 at the central portion in the axial direction, is rotatably supported by the apparatus main body, and is rotated by driving means (not shown) such as a motor. In addition, a thermal radiation paint 63 indicated by hatching in FIG. 2A is applied to the peripheral surface and the end surface of both end portions 61a of the rotating shaft 61.

  As the heat radiation coating 63, a silicon resin, a polyamideimide resin, or an alkyd resin mixed with ceramics and a metal oxide can be used. However, in the present embodiment, a silicon resin mixed with ceramics and a metal oxide is used. Radiant paint is used, and this heat radiation paint 63 is applied to both ends 61a by air spray painting. By applying this coating, heat generated in the photosensitive drum 60 during image formation is conducted to the flange 60a and the rotating shaft 61, and is radiated from both ends 61a.

  As shown in FIG. 2B, when the rotating shaft 61 is rotating, the heat of the rotating shaft 61 is dissipated from the circumferential surface of the rotating shaft 61, and in the same direction as the rotating shaft 61 due to the rotational force of the rotating shaft 61. Rotating flow H rotating in the direction of rotation, and further by the centrifugal force of the rotating shaft 61, it becomes a radiating flow R in the radial direction, radiated from the entire circumference of the rotating shaft 61, and further radiated from both ends 61a together with the heat radiation paint. .

(Second Embodiment)
FIG. 3A is a perspective view showing a main part of a rotating shaft provided with a heat dissipating member according to the second embodiment of the present invention, and FIG. 3B is a view of FIG. It is a figure. 3 (a) and 3 (b) show the left end 61a of the rotating shaft 61 in FIG. 2 (a), but there is also a heat dissipation member at the right end 61a in FIG. 2 (a). Is provided. In addition, the heat radiating member different from 1st Embodiment is demonstrated, and description of the same part as 1st Embodiment is abbreviate | omitted hereafter.

  A plurality of heat radiating plates 64 as heat radiating members are provided at the end 61a of the rotating shaft 61 in parallel with each other and inclined with respect to the axial direction of the rotating shaft 61 (inclination angle α is approximately 85 degrees). As shown in 3 (b), when the rotating shaft 61 rotates due to this inclination, a wind flow W toward the end surface of the rotating shaft 61 is generated around the rotating shaft 61. The heat radiating paint is applied to the plurality of heat radiating plates 64 together with the end portions 61a.

  As shown in FIG. 3B, when the rotary shaft 61 is rotating, the heat of the rotary shaft 61 is dissipated from the circumferential surface of the rotary shaft 61 and the rotational force of the rotary shaft 61 is rotated, as in the second embodiment. As a result, a rotating flow that rotates in the same direction as the rotating shaft 61 is generated, and further, a radial flow is generated in the radial direction by the centrifugal force of the rotating shaft 61, and heat is radiated from the entire circumference of the rotating shaft 61. The heat radiated from the entire circumference of the rotating shaft 61 flows toward the end surface of the rotating shaft 61 along the wind flow W generated by the rotating heat sink 64.

  Further, since the heat radiating plate 64 is formed of a metal having a high thermal conductivity such as copper, aluminum, and stainless steel in a semicircular plate shape so as to increase the surface area, the heat radiating plate 64 is conducted from the photosensitive drum 60 to the rotating shaft 61. Heat is radiated from the heat radiating plate 64 together with the end portion 61a.

(Third embodiment)
FIG. 4 is a perspective view showing a main part of a rotating shaft provided with a heat radiating member according to the third embodiment of the present invention. 4 shows the left end 61a of the rotating shaft 61 in FIG. 2, a heat radiating member is also provided on the right end 61a of FIG.

  A fin 65 as a heat radiating member is provided on the peripheral surface of the end 61 a of the rotating shaft 61, and a heat radiation paint is applied to the end 61 a and the fin 65. The fins 65 are made of a metal having a high thermal conductivity such as copper, aluminum, and stainless steel in a spiral plate shape on the peripheral surface of the end portion 61a. The heat conducted from the photosensitive drum 60 to the rotating shaft 61 is radiated from the fins 65 together with the end portions 61a. Further, when the rotating shaft 61 is rotating, the circumferential shape of the rotating shaft 61 is caused by the helical shape of the fins 65. While rotating, a wind flow is generated in the axial direction, and heat conducted from the photosensitive drum 60 to the rotating shaft 61 is radiated from the end portion 61a along the wind.

(Fourth embodiment)
FIG. 5A is a perspective view showing a main part of a rotating shaft provided with a heat dissipating member according to the fourth embodiment of the present invention, and FIG. 5B is a view of FIG. It is a figure. 5 (a) and 5 (b) show the left end 61a of the rotating shaft 61 in FIG. 2 (a), but there is also a heat dissipation member at the right end 61a in FIG. 2 (a). Is provided.

  A fin 66 as a heat radiating member is provided on the peripheral surface of the end 61 a of the rotating shaft 61, and a heat radiation paint is applied to the end 61 a and the fin 66. The fins 66 are made of a metal having a high thermal conductivity such as copper, aluminum, and stainless steel, and four rectangular plates are arranged at equal angles in the circumferential direction on the peripheral surface of the rotating shaft 61. The heat conducted from the photosensitive drum 60 to the rotating shaft 61 is radiated from the fins 66 together with the end portions 61a.

  As shown in FIG. 5B, when the rotating shaft 61 is rotating, the heat of the rotating shaft 61 is dissipated from the circumferential surface of the rotating shaft 61 and the rotational force of the rotating shaft 61 is rotated as in the second embodiment. As a result, a rotating flow that rotates in the same direction as the rotating shaft 61 is generated, and further, a radial flow is generated in the radial direction by the centrifugal force of the rotating shaft 61, and heat is radiated from the entire circumference of the rotating shaft 61. The heat radiated from the entire circumference of the rotating shaft 61 flows in the circumferential direction of the rotating shaft 61 along the wind flow W generated by the rotating fins 66.

  In the first to fourth embodiments, the configuration in which the heat radiation paint is applied to the rotating shaft 61 that rotates the photosensitive drum 60 as the rotated body is shown, but the present invention is not limited to this, and the developing roller Even if the heat radiation paint is applied to the rotating shaft for rotating the rotating body related to image formation such as the primary transfer rollers 26a to 26d and the secondary transfer roller 34 as in the first to fourth embodiments, the same as above. The effect of.

  In the first to fourth embodiments, the configuration in which the heat radiation paint is applied to the rotating shaft 61 that rotates the photosensitive drum 60 as the rotated body is shown. However, the present invention is not limited thereto, and the fixing unit is not limited thereto. The heat radiation paint may be applied to the rotation shaft of the transport roller arranged on the downstream side of the 18th closest paper transport. In this case, the sheet P that has become hot after fixing passes through the transport roller, whereby the heat of the sheet P is transmitted from the transport roller to the rotating shaft, and is radiated from the rotating shaft, thereby fixing the sheet P after fixing. When the toner image is reversed by the reversal conveyance path 40 and secondarily transferred to the back surface of the paper P, a stable toner image is formed on the paper P.

  In the first to fourth embodiments, the example in which the image forming apparatus is applied to a tandem color printer has been described. However, the present invention is not limited to this, and the photosensitive drum is used in a monochrome printer and a monochrome copying machine. Even if the heat radiation paint is applied to the rotating shaft that rotates the rotating body such as the developing roller and the sheet conveying roller as in the first to fourth embodiments, the same effect as described above is obtained.

  The present invention can be used for an image forming apparatus such as a copying machine, a printer, a facsimile, or a composite machine using an electrophotographic system.

1 is a cross-sectional front view illustrating a schematic configuration of an image forming apparatus according to a first embodiment of the present invention. FIG. 2 is a diagram illustrating a photoconductor according to the first embodiment of the present invention. These are figures which show the thermal radiation member which concerns on 2nd Embodiment of this invention. These are perspective views which show the thermal radiation member which concerns on 3rd Embodiment of this invention. These are figures which show the thermal radiation member which concerns on 4th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image forming apparatus 2a-2d Developing part 11a-11d Photoconductor 17 Intermediate transfer belt 18 Fixing part 60 Photosensitive drum (Rotating body)
61 Rotating shaft 61a End 63 Thermal radiation paint 64 Heat radiating plate (heat radiating member)
65, 66 fins (heat dissipating members)
P paper

Claims (6)

A developing unit that develops the electrostatic latent image on the photoconductor, a transfer unit that transfers the toner image formed on the photoconductor to a sheet, a conveyance unit that conveys the sheet to the transfer unit, and the toner image are formed. A fixing unit that heats and pressurizes the sheet, a rotating member that is provided in the developing unit, the transfer unit, the conveying unit, or the fixing unit, and rotates to form an image or convey the sheet, and the rotated member In an image forming apparatus provided with a rotating member that rotates
An image forming apparatus, wherein a heat radiation paint is applied to the rotating member.   The image forming apparatus according to claim 1, wherein the rotating member includes a rotating shaft that holds a rotating body, and the thermal radiation paint is applied to an end of the rotating shaft.   The image forming apparatus according to claim 2, wherein a heat radiating member is provided at an end of the rotating shaft, and the heat radiation paint is applied to the end of the rotating shaft and the heat radiating member.   The image forming apparatus according to claim 3, wherein the heat radiating member is a fin formed on a peripheral surface of the rotating shaft.   The image forming apparatus according to claim 4, wherein the heat radiating member is a fin spirally formed on a peripheral surface of the rotating shaft.   The image forming apparatus according to claim 4, wherein the heat dissipating member is a fin formed in a circumferential direction on a peripheral surface of the rotating shaft.

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