JP2014185675A - Transfer roll, fixation device, and image formation apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transfer roll which inhibits a volatile organic compound (VOC) from being emitted from an elastic layer, and to provide a fixation device and an image formation apparatus.SOLUTION: In a conventional heating roll structure, an end part of an elastic layer is exposed and thus a volatile organic compound is emitted from the end part by heat generated from a halogen lamp. However, an end part of an elastic layer 110 of a heating roll 102 according to one embodiment is covered by a contact part 112B of an inhibition layer 112. Thus, the volatile organic compound is inhibited from being emitted from the elastic layer 110 compared to a conventional example.

Description

  The present invention relates to a conveyance roll, a fixing device, and an image forming apparatus.

  The fixing roll used in the image forming apparatus of Patent Document 1 is composed of a rubber material having a three-layer structure in which an elastic layer, a conductive layer, and a release layer are sequentially laminated from the inside of the roll toward the outside. And a mold release layer consists of fluororubber which does not contain a filler substantially as a compounding agent.

JP 09-022212 A

  An object of the present invention is to suppress the release of volatile organic compounds (VOC) from the elastic layer.

  The transport roll according to claim 1 of the present invention is laminated on the outer periphery of the rotating shaft, and is laminated on the outer circumference of the elastic layer including an elastic layer containing a volatile organic compound, and the end of the elastic layer. And a suppression layer that covers the portion and contacts the rotating shaft and suppresses permeation of volatile organic compounds.

  A fixing device according to a second aspect of the present invention includes the conveyance roll according to the first aspect, and includes a heating member that contacts the toner image transferred to the recording medium and heats the toner image, and the recording medium And a pressurizing member that pressurizes toward the heating member.

  A fixing device according to a third aspect of the present invention includes a heating member that contacts a toner image formed on a recording medium and heats the toner image, and a conveyance roll according to the first aspect, and the recording medium And a pressurizing member that pressurizes toward the heating member.

  According to a fourth aspect of the present invention, there is provided a fixing device that contacts a toner image formed on a recording medium and heats the toner image, and is provided with a rotatable heating member, a base material, and a heating member side of the base material. A laminated elastic layer comprising a volatile organic compound, and laminated on the elastic layer and covering the end of the elastic layer and contacting the substrate to suppress permeation of the volatile organic compound And a pressure member that presses the recording medium toward the heating member through the elastic layer and the suppression layer by being pressed toward the heating member. And

  An image forming apparatus according to a fifth aspect of the present invention includes the transport roll according to claim 1 that transports a recording medium, and an image forming unit that forms an image on the recording medium transported by the transport roll. It is characterized by.

  An image forming apparatus according to a sixth aspect of the present invention includes an image forming unit that forms a toner image on a recording medium, and the toner image formed by the image forming unit is fixed to the recording medium. And a fixing device according to item 1.

  According to the transport roll of the first aspect of the present invention, it is possible to suppress the release of the volatile organic compound from the elastic layer as compared with the case where the end of the elastic layer is exposed.

  According to the fixing device of the second aspect of the present invention, the volatile organic compound is released from the elastic layer as compared with the case where the heating member is not configured to include the conveying roll according to the first aspect. Can be suppressed.

  According to the fixing device of the third aspect of the present invention, the volatile organic compound is released from the elastic layer as compared with the case where the pressure member is not configured to include the conveying roll according to the first aspect. Can be suppressed.

  According to the fixing device of the fourth aspect of the present invention, it is possible to suppress the release of the volatile organic compound from the elastic layer as compared with the case where the elastic layer is partially exposed.

  According to the image forming apparatus of the fifth aspect of the present invention, it is possible to suppress the release of the volatile organic compound as compared with the case where the conveyance roll according to the first aspect is not provided.

  According to the image forming apparatus of the sixth aspect of the present invention, the emission of the volatile organic compound is suppressed as compared with the case where the fixing device according to any one of the second to fourth aspects is not provided. can do.

FIG. 3 is a cross-sectional view showing a heating roll used in the fixing device according to the first embodiment of the present invention. (A) (B) (C) (D) It is process drawing which showed the process for manufacturing the heating roll used for the fixing apparatus which concerns on 1st Embodiment of this invention. 1 is a side view illustrating an image forming unit provided in an image forming apparatus according to a first embodiment of the present invention. 1 is a schematic configuration diagram illustrating an image forming apparatus according to a first embodiment of the present invention. It is sectional drawing which showed the heating roll as a comparative example with respect to the heating roll used for the fixing apparatus which concerns on 1st Embodiment of this invention. FIG. 6 is an enlarged cross-sectional view showing an elastic layer and the like of a pressure member used in a fixing device according to a second embodiment of the present invention. It is sectional drawing which showed the fixing device which concerns on 2nd Embodiment of this invention.

<First Embodiment>
An example of a conveyance roll, a fixing device, and an image forming apparatus according to the first embodiment of the present invention will be described with reference to FIGS. When the image forming apparatus is viewed from the front, the arrow X direction shown in each figure is the right direction, the arrow -X direction is the left direction, the arrow Y direction is the upward direction, the arrow -Y direction is the downward direction, and the arrow Z direction is the depth. The direction and the arrow-Z direction correspond to the front direction.

(overall structure)
As shown in FIG. 4, the image forming apparatus 10 includes a sheet storage unit 12 that stores a sheet member P as an example of a recording medium from the lower side to the upper side in the vertical direction (Y direction), and the sheet storage. A main operation unit 14 that forms an image on a sheet member P that is provided on the upper side of the unit 12 and that is supplied from the paper storage unit 12; The transport unit 18 transports the sheet member P to each unit, and a control unit 20 that is provided in the main operation unit 14 and controls the operation of each unit of the image forming apparatus 10. The image forming apparatus 10 includes an apparatus main body 10A as a casing made up of a plurality of frame members.

[Paper compartment]
The sheet storage unit 12 includes a first storage unit 22, a second storage unit 24, a third storage unit 26, and a fourth storage unit 28 that can store sheet members P having different sizes. The 1st accommodating part 22, the 2nd accommodating part 24, the 3rd accommodating part 26, and the 4th accommodating part 28 are the delivery roll 32 which sends out the accommodated sheet member P sheet by sheet, and the sent sheet member P is an image. And a transport roll 34 that transports the transport path 30 provided in the forming apparatus 10. The configuration of the transport roll 34 will be described later in detail.

[Transport section]
The conveyance unit 18 includes a plurality of conveyance rolls 36 that are arranged on the downstream side of the conveyance path 30 with respect to the conveyance roll 34 and convey the sheet member P one by one. Further, the sheet member P is stopped at one end downstream of the conveying roll 36 in the conveying direction of the sheet member P, and the image is transferred by sending the sheet member P to a secondary transfer position described later at a predetermined timing. An alignment roll 38 for performing the alignment is disposed. The configuration of the transport roll 36 will be described later in detail.

  The upstream portion of the conveyance path 30 is linear from the −X direction side of the sheet storage unit 12 to the −X direction side lower portion of the main operation unit 14 in the arrow Y direction in the front view of the image forming apparatus 10. Yes. Further, the downstream portion of the transport path 30 extends from the lower portion on the −X direction side of the main operation portion 14 to the paper discharge portion 13 provided at the lower portion on the X direction side of the main operation portion 14.

  Further, a double-sided conveyance path 31 through which the sheet member P is conveyed and reversed in order to form an image on both sides of the sheet member P is connected to the conveyance path 30. The conveyance direction of the sheet member P when the double-sided conveyance is not performed is indicated by an arrow A.

  The double-sided conveyance path 31 includes a reversing unit 33 that is linearly provided in the arrow Y direction from the lower portion in the X direction of the main operation unit 14 to the X direction side of the sheet storage unit 12 in a front view of the image forming apparatus 10, The rear end of the sheet member P conveyed to the section 33 enters, and a conveyance section 35 that conveys the sheet member P to the illustrated −X direction side (indicated by an arrow B) is provided. The downstream end of the transport unit 35 is connected to the transport path 30 by a guide member (not shown) on the upstream side of the alignment roll 38 of the transport path 30. In FIG. 4, the illustration of a switching member that switches between the conveyance path 30 and the double-sided conveyance path 31 and a switching member that switches between the reversing unit 33 and the conveyance unit 35 are omitted.

[Original reading section]
The document reading unit 16 has a document table 41 on which a plurality of documents (not shown) can be placed, a platen glass 42 on which a single document is placed, and a document reading device 44 that reads a document placed on the platen glass 42. And a document discharge section 43 for discharging the read document.

  The document reading device 44 irradiates light on a document placed on the platen glass 42, and reflects reflected light emitted from the light irradiation unit 46 and reflected from the document in a direction parallel to the platen glass 42. One full-rate mirror 48 and two half-rate mirrors 52 folded back, an imaging lens 54 on which the reflected light reflected by the full-rate mirror 48 and the half-rate mirror 52 enters, and an image formed by the imaging lens 54 And a photoelectric conversion element 56 that converts the reflected light into an electric signal.

  The electric signal converted by the photoelectric conversion element 56 is subjected to image processing by an image processing apparatus (not shown) and used for image formation. The full rate mirror 48 moves at a full rate along the platen glass 42, and the half rate mirror 52 moves at a half rate along the platen glass 42.

[Main operation part]
The main operation unit 14 fixes the toner image formed on the sheet member P formed by the image forming unit 60 to the sheet member P by heat and pressure. And a fixing device 100.

[Image forming unit]
The image forming unit 60 includes image forming units 64K, 64C including image holding bodies 62K, 62C, 62M, 62Y corresponding to yellow (Y), magenta (M), cyan (C), and black (K) toners. 64M, 64Y, exposure units 66K, 66C, 66M, 66Y that perform exposure by emitting a light beam L toward the outer peripheral surfaces of the image carriers 62K, 62C, 62M, 62Y, and image forming units 64K, 64C, And a transfer unit 68 that transfers a toner image formed of 64M and 64Y onto the sheet member P.

  In the following description, if it is necessary to distinguish Y, M, C, and K, an alphabetic letter Y, M, C, or K will be added after the numeral, and the same configuration will be used. , M, C, and K need not be distinguished from each other, description of Y, M, C, and K is omitted.

[Exposure unit (image forming unit)]
The exposure unit 66 scans a light beam emitted from a light source (not shown) with a rotating polygon mirror (polygon mirror: unsigned) and reflects it with a plurality of optical components including a reflection mirror to correspond to each color toner. The light beam L is emitted toward the image carrier 62. Further, the image carrier 62 is provided on the lower side (−Y direction side) of the exposure unit 66.

[Image forming unit (image forming unit)]
As shown in FIG. 3, the image forming unit 64 has a cylindrical image holding body 62 that can be rotated in the arrow + R direction (clockwise direction in the figure), and an outer peripheral surface of the image holding body 62. The charging unit 72, the developing unit 74, and the cleaning member 76 are sequentially arranged from the upstream side to the downstream side in the rotation direction.

  The charging device 72 and the developing device 74 are arranged so that the light beam L is irradiated to a position between the charging device 72 and the developing device 74 on the outer peripheral surface of the image carrier 62. Further, an intermediate transfer belt 82 described later is in contact with a position between the developing device 74 and the cleaning member 76 on the outer peripheral surface of the image carrier 62.

  The image holding body 62 can be rotated in the arrow + R direction by driving a motor (not shown). The charger 72 includes, for example, a corotron charging unit that applies a voltage to the wire and charges the outer peripheral surface of the image holding member 62 with the same polarity as the toner by corona discharge. Here, the latent image (electrostatic latent image) is formed by irradiating the outer peripheral surface of the charged image carrier 62 with the light beam L based on the image data.

  As an example, the developing device 74 contains a developer G in which carrier particles made of a magnetic material and negatively charged toner are mixed, and a magnet roll (not shown) having a plurality of magnetic poles in the circumferential direction is disposed inside. A provided cylindrical developing sleeve 75 is provided. The developing device 74 is configured such that a magnetic brush is formed at a portion facing the image carrier 62 as the developing sleeve 75 rotates. Further, the developing device 74 applies a developing bias to the developing sleeve 75 by a voltage applying means (not shown), thereby revealing the latent image on the outer peripheral surface of the image holding body 62 with toner, thereby developing a toner image (developer). Image). Each developing device 74 is supplied with toner from each toner cartridge 79 (see FIG. 4) provided above the image forming unit 60.

  The cleaning member 76 includes a cleaning blade 77 that comes into contact with the outer peripheral surface of the image carrier 62, and the toner remaining on the outer peripheral surface of the image carrier 62 is scraped off and collected by the cleaning blade 77. Further, an intermediate transfer belt 82 to which the toner image developed by the developing device 74 is primarily transferred is provided downstream of the developing device 74 in the rotation direction of the image holding body 62.

[Transfer unit (image forming unit)]
As shown in FIG. 4, the transfer unit 68 includes an endless intermediate transfer belt 82, a primary transfer roll 84 that primarily transfers a toner image from the image carrier 62 onto the intermediate transfer belt 82, and the intermediate transfer belt 82. And a secondary transfer roll 86 and an auxiliary roll 88 that secondarily transfer the toner images sequentially stacked on the sheet member P to the sheet member P.

  Inside the intermediate transfer belt 82, a driving roll 92 that is driven to rotate and a plurality of conveying rolls 94 that are rotatably provided are arranged. The intermediate transfer belt 82 is wound around primary transfer rolls 84K, 84C, 84M, and 84Y, a drive roll 92, a transport roll 94, and an auxiliary roll 88. As a result, the intermediate transfer belt 82 rotates in the direction of arrow C (counterclockwise direction in the figure) when the drive roll 92 rotates counterclockwise in the figure.

  As an example, the primary transfer roll 84 has a configuration in which an elastic layer (not shown) is formed around a cylindrical shaft made of a metal such as stainless steel, and both ends of the shaft are supported by bearings. Can be rotated. Further, the primary transfer roll 84 is configured such that a voltage (positive voltage) having a polarity opposite to the polarity of the toner is applied to the shaft from a power source (not shown).

  As an example, the secondary transfer roll 86 has the same configuration as the primary transfer roll 84, and is disposed downstream of the alignment roll 38 in the transport path 30 and is rotatably provided. The secondary transfer roll 86 is in contact with the outer peripheral surface of the intermediate transfer belt 82 at the secondary transfer position so that the intermediate transfer belt 82 is sandwiched between the auxiliary roll 88.

  The secondary transfer roll 86 is grounded. The auxiliary roll 88 forms a counter electrode of the secondary transfer roll 86, and a secondary transfer voltage is applied via a metal power supply roll (not shown) arranged in contact with the outer peripheral surface of the auxiliary roll 88. It has come to be. Here, when a secondary transfer voltage (negative voltage) is applied to the auxiliary roll 88 and a potential difference is generated between the auxiliary roll 88 and the secondary transfer roll 86, the secondary transfer roll 86 and the intermediate transfer belt 82 are The toner image on the intermediate transfer belt 82 is secondarily transferred onto the sheet member P conveyed to the contact portion.

  On the downstream side of the secondary transfer roll 86 in the moving direction of the sheet member P, a conveyance belt 96 that conveys the sheet member P, on which the secondary transfer of the toner image has been completed, to the fixing device 100 is provided. The conveyance belt 96 is wound around a support roll 97 and a drive roll 98 and is moved so as to circulate the sheet member P to the fixing device 100.

[Fixing device]
The fixing device 100 includes a heating roll 102 as an example of a heating member that heats the toner image transferred (formed) to the sheet member P, and pressurization that pressurizes the conveyed sheet member P toward the heating roll 102. A pressure roll 104 as an example of a member is provided. Details of the fixing device 100 will be described later.

(Operation of the overall configuration)
Next, the operation of this embodiment will be described.

  When an image is formed on the sheet member P, as shown in FIG. 3, each image carrier 62 is charged by a charger 72 and light beams emitted from each exposure unit 66 according to image data. The electrostatic latent image is formed on the image carrier 62 by being exposed by L.

  Subsequently, the electrostatic latent image formed on the outer peripheral surface of each image carrier 62 is subjected to toner of each color of yellow (Y), magenta (M), cyan (C), and black (K) by the developing device 74, respectively. Developed as an image.

  Subsequently, each toner image formed on the surface of each image holding member 62 is sequentially multiplex-transferred onto the intermediate transfer belt 82 by each primary transfer roll 84 at the primary transfer position, as shown in FIG. . The toner image that has been multiplex-transferred onto the intermediate transfer belt 82 is secondarily transferred by the secondary transfer roll 86 and the auxiliary roll 88 onto the sheet member P that has been transported through the transport path 30 at the secondary transfer position. .

  Subsequently, the sheet member P to which the toner image has been transferred is conveyed toward the fixing device 100 by the conveyance belt 96. In the fixing device 100, the toner image on the sheet member P is fixed by being heated and pressed. For example, the sheet member P on which the toner image is fixed is discharged to the paper discharge unit 13. In this way, a series of image forming steps are performed.

  When a toner image is formed on a non-image surface on which no image is formed (in the case of double-sided image formation), after fixing the image on the surface with the fixing device 100, the sheet member P is fed into the double-sided conveyance path 31. The back side image is formed and fixed.

(Main part configuration)
Next, the configuration and the like of the fixing device 100 and the transport rollers 34 and 36 will be described.

[Fixing device]
As described above, the fixing device 100 includes the heating roll 102 that heats the toner image transferred to the sheet member P and the pressure roll 104 that pressurizes the sheet member P toward the heating roll 102.

[Heating roll: Fixing device]
The heating roll 102 is arrange | positioned so that it may extend in a Z direction, as FIG. 1 shows. The heating roll 102 is provided with a cylindrical rotating shaft 108 made of aluminum, in which a halogen lamp (not shown) as a heating source is disposed. Furthermore, the heating roll 102 includes an elastically deformable elastic layer 110 stacked on the outer periphery of the rotating shaft 108 and a suppression layer 112 that is a surface layer stacked on the outer periphery of the elastic layer 110.

  Specifically, the elastic layer 110 is formed from a silicone rubber containing a volatile organic compound (hereinafter sometimes referred to as “VOC”), and has a thickness of 0.42 [mm]. .

  On the other hand, the suppression layer 112 is formed from a fluorine-based resin (for example, PFA) that suppresses the transmission of VOC and has a thickness of 0.03 [mm]. The suppression layer 112 includes a stacked portion 112A that is stacked on the elastic layer 110, and a contact portion that extends from the end of the stacked portion 112A toward the rotating shaft 108 and covers the end of the elastic layer 110 and contacts the rotating shaft 108. 112B and an outer peripheral portion 112C extending in the axial direction of the rotary shaft 108 from the end of the contact portion 112B and covering a part of the outer peripheral surface of the rotary shaft 108.

  Further, a rotational force is transmitted from a drive source (not shown) to the rotation shaft 108 of the heating roll 102 so that the heating roll 102 rotates.

  Here, a part of manufacturing process of the heating roll 102 will be described with reference to FIG.

  First, as shown in FIGS. 2A and 2B, the elastic layer 110 is formed on the cylindrical rotating shaft 108.

  Next, as shown in FIG. 2C, a PFA tube 116 whose diameter is larger than the outer diameter of the elastic layer 110 is disposed so as to cover the elastic layer 110. Note that the length of the PFA tube 116 in the rotation axis direction is longer than the length of the elastic layer 110 in the rotation axis direction.

  Next, the PFA tube 116 is heated and contracted to form the suppression layer 112 as shown in FIG.

[Pressure roll: Fixing device]
The pressure roll 104 is rotatably supported by a frame member (not shown). The pressure roll 104 has the same configuration as the heating roll 102 except that the heating roll 102 does not have a halogen lamp and the rotational force is not transmitted from the drive source to the rotation shaft. ing.

  Then, as shown in FIG. 4, the pressure roller 104 contacts and rotates with the rotating heating roller 102, so that the sheet member P to which the toner image is transferred becomes the heating roller 102 and the pressing roller 104. And the toner image is fixed to the sheet member P.

[Transport roll]
The transport rolls 34 and 36 are rotatably supported by a frame member (not shown). The conveyance rolls 34 and 36 have the same configuration as the heating roll 102 except that the heating roll 102 does not have a halogen lamp and the rotational force is not transmitted from the drive source to the rotation shaft. Yes.

(Effects of main components)
Next, the operation of the main configuration will be described.

  When fixing the toner image transferred (formed) on the sheet member P to the sheet member P, for example, the heating member 102 having a surface temperature of 200 ° C. and the pressure roller 104 are used to fix the sheet member P. Nipped and conveyed.

  By the way, in the structure of the conventional heating roll 130 shown in FIG. 5, since the edge part of the elastic layer 110 is exposed, VOC may be discharge | released from this edge part by heat_generation | fever of a halogen lamp.

  However, as shown in FIG. 1, the end portion of the elastic layer 110 of the heating roll 102 according to the present embodiment is covered with the contact portion 112 </ b> B of the suppression layer 112. , The release of VOC from the elastic layer 110 is suppressed.

  Further, since the pressure roll 104 has the same configuration as that of the heating roll 102, the release of VOC from the elastic layer of the pressure roll 104 is suppressed.

  Further, since the transport rolls 34 and 36 have the same configuration as the heating roll 102, VOC is released from the elastic layers of the transport rolls 34 and 36 when the transport rolls 34 and 36 are arranged at a high temperature. Is suppressed.

  In addition, since the ends of the elastic layers of the heating roll 102, the pressure roll 104, and the transport rolls 34 and 36 are covered with the contact portion of the suppression layer, soaking into the elastic layer such as oil floating in the apparatus is suppressed. Is done.

Second Embodiment
Next, an example of the fixing device and the image forming apparatus according to the second embodiment of the present invention will be described with reference to FIGS. In addition, about the same member as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. Moreover, the different part from 1st Embodiment is mainly demonstrated and description of another part is abbreviate | omitted.

  As shown in FIG. 7, the fixing device 200 according to the second embodiment includes a heating roll 202 as an example of a heating member, and a pressing member 210 that presses the sheet member P toward the heating roll 202. Yes.

[Heating member]
The heating roll 202 includes a cylindrical cylindrical body 202A extending in the Z direction and a halogen lamp 202B disposed inside the cylindrical body 202A. Then, a rotational force is transmitted to the heating roll 202 from a driving source (not shown), so that the heating roll 202 rotates.

[Pressure member]
The pressure member 210 is an endless (annular) pressure belt 212 extending in the Z direction, and a support mechanism 214 that is disposed inside the pressure belt 212 and supports the pressure belt 212 so as to be rotatable (rotatable). And.

[Support mechanism]
The support mechanism 214 includes a frame 216 that extends in the Z direction and has an L-shaped cross section that extends in the Y direction. The support mechanism 214 is a holding member as an example of a base material in which the base end side is fitted to the distal end side (the heating roll 202 side) of the frame 216 and the attachment surface 218A facing the heating roll 202 side is formed on the distal end side. 218.

  Further, an elastic layer 220 that extends in the Z direction and has a quadrangular cross section is attached (stacked) to the mounting surface 218A of the holding member 218, and a suppression layer 224 is stacked on the elastic layer 220.

  The frame 216 presses the sheet member P to the heating roll 202 via the holding member 218, the elastic layer 220, the suppression layer 224, and the pressure belt 212. The elastic layer 220 and the suppression layer 224 will be described later.

  Further, in the frame 216, a base end surface 216 </ b> A facing the inner peripheral surface of the pressure belt 212 is formed on the base end side of the frame member 216. A felt 230 extending in the Z direction is attached to the base end face 216A. The felt 230 is soaked with a lubricant such as oil, and the lubricant is applied to the inner peripheral surface of the pressure belt 212 that rotates (circulates).

  Further, the support mechanism 214 is disposed on the X direction side of the frame 216 and is disposed on the −X direction side of the frame 216 and a semi-cylindrical semicircular member 232 that supports the inner peripheral surface of the circulating pressure belt 212. And a semi-cylindrical semicircular member 234 that supports the inner peripheral surface of the rotating pressure belt 212.

  Support members (not shown) for supporting the semicircular members 232 and 234 and the frame 216 are provided at both ends of the semicircular members 232 and 234 and the frame 216 in the Z direction.

  With the above configuration, when the heating roll 202 rotates, the pressure belt 212 that contacts the heating roll 202 circulates around the support mechanism 214. The sheet member P is nipped and conveyed between the heating roll 202 and the pressure belt 212 so that the toner image transferred to the sheet member P is fixed to the sheet member P.

(Main part configuration)
Next, the elastic layer 220 and the suppression layer 224 will be described.

  The elastic layer 220 is formed from silicone rubber that contains a volatile organic compound.

  On the other hand, the suppression layer 224 is formed of a fluorine-based resin (for example, PFA) that suppresses transmission of VOC. Then, as shown in FIG. 6, the suppression layer 224 includes a laminated portion 224A laminated on the elastic layer 220, and extends from the end of the laminated portion 224A toward the mounting surface 218A and covers the end of the elastic layer 220. The contact portion 224B is in contact with the attachment surface 218A, and the attachment portion 224C extends from the end of the contact portion 224B along the attachment surface 218A and covers a part of the attachment surface 218A. In addition, about the contact part 224B and the attachment part 224C, although it demonstrated using the cross section (refer FIG. 6) which cut | disconnected the elastic layer 220 in the direction orthogonal to the longitudinal direction, the cross section which cut | disconnected the elastic layer 220 to the longitudinal direction is also, It has the same configuration as a cross section cut in a direction orthogonal to the longitudinal direction. That is, the four end portions of the elastic layer 220 are covered with the contact portion 224B.

  As described above, since the laminated portion 224A of the suppression layer 224 is laminated on the elastic layer 220 and the contact layer 224B of the suppression layer 224 covers the end of the elastic layer 220, VOC is released from the elastic layer 220. Is suppressed.

  Although the present invention has been described in detail using specific embodiments, the present invention is not limited to such embodiments, and various other embodiments can be taken within the scope of the present invention. It will be apparent to those skilled in the art. For example, in the first embodiment, the case where the fixing device 100 includes the heating roll 102 has been described as an example. However, a case where a fixing belt is used may be used. That is, the configuration of the heating roll 102 may be used for the roll around which the fixing belt is wound.

  Moreover, in the said 1st Embodiment, although this invention was implemented about the heating roll 102, the pressurization roll 104, and the conveyance rolls 34 and 36, it should just be implemented to any one member.

  Moreover, although not specifically described in the first embodiment, the elastic layers may be divided into a plurality of portions in the axial direction in the transport rollers 34 and 36.

  In the first embodiment, the case where the configuration of the present application is used for the transport rolls 34 and 36 provided in the image forming apparatus 10 has been described as an example. However, the transport roll provided in a fax machine, a scanner, a bank ATM, or the like is used. The configuration of the present application may be used.

  Moreover, you may implement this invention in the heating roll 202 of the said 2nd Embodiment.

DESCRIPTION OF SYMBOLS 10 Image forming apparatus 34 Conveyance roll 36 Conveyance roll 60 Image forming part 100 Fixing apparatus 102 Heating roll (an example of a heating member)
104 Pressure roll (an example of a pressure member)
108 Rotating shaft 110 Elastic layer 112 Suppression layer 200 Fixing device 202 Heating roll (an example of a heating member)
210 Pressure member (an example of a pressure member)
218 Holding member (an example of a base material)
220 Elastic layer 224 Suppression layer

Claims (6)

An elastic layer laminated on the outer periphery of the rotating shaft and comprising a volatile organic compound;
A suppression layer that is laminated on the outer periphery of the elastic layer, covers an end of the elastic layer, contacts the rotating shaft, and suppresses permeation of volatile organic compounds;
A transport roll comprising A heating member configured to include the transporting roll according to claim 1 and heating the toner image in contact with the toner image transferred to the recording medium;
A pressure member that pressurizes the recording medium toward the heating member;
A fixing device. A heating member for heating the toner image in contact with the toner image formed on the recording medium;
A pressurizing member configured to include the transport roll according to claim 1 and pressurizing the recording medium toward the heating member;
A fixing device. Heating the toner image in contact with the toner image formed on the recording medium, and a rotatable heating member;
A base material, an elastic layer that is laminated on the heating member side of the base material and includes a volatile organic compound, and is laminated on the elastic layer and covers an end of the elastic layer; And a suppression layer that suppresses permeation of volatile organic compounds, and is pressed toward the heating member so that the recording medium is directed toward the heating member via the elastic layer and the suppression layer. A pressure member for pressurization;
A fixing device. The conveyance roll according to claim 1 which conveys a recording medium,
An image forming unit that forms an image on a recording medium conveyed by the conveyance roll;
An image forming apparatus comprising: An image forming unit for forming a toner image on a recording medium;
The fixing device according to claim 2, wherein the toner image formed by the image forming unit is fixed on a recording medium.
An image forming apparatus comprising:

Images