JP2019053201A - Image formation apparatus, fixation device and heat insulation material - Google Patents

Abstract

To provide an image formation apparatus which can surely insert a heat insulation material into a contact part in comparison to a case of inserting the heat insulation material into the contact part by pressing the heat insulation material using the rigidity of the heat insulation material, and a fixation device and the heat insulation material.SOLUTION: An image formation apparatus 10 includes: an image formation part 120; a main heating roll 210 which heats a continuous sheet P; a heat insulation sheet 300 which is inserted into a contact part N where the continuous sheet P contacts the main heating roll 210; and a movement mechanism 400 which moves the heat insulation sheet 300 between the first position inserted between the main heating roll 210 and the continuous sheet P and the second position separated from the continuous sheet P and the main heating roll 210. The heat insulation sheet 300 is connected with a connection part 380. The movement mechanism 400 moves the heat insulation sheet 300 so as to pull it into the contact part N through the connection part 380.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an image forming apparatus, a fixing device, and a heat insulating material.

  In Patent Document 1, a fixing surface side member disposed on a fixing surface side of a long paper on which a toner image is formed, and the long paper are nipped and conveyed while being pressed against the fixing surface side member. When the long paper is not conveyed in the heated state of the back side member forming the fixing nip portion and / or the fixing surface side member and / or the back side member, the long paper and the An image forming apparatus is provided that includes a heat insulating member insertion portion that inserts a heat insulating member between at least one of the fixing surface side member and between the long paper and the back surface side member.

  Patent Document 2 discloses an image forming unit that forms an image on continuous paper, a fixing unit that fixes the continuous paper on which an image is formed by the image forming unit, and a detection unit that detects the temperature of the fixing unit. A control unit that varies a conveyance speed of the continuous sheet conveyed according to the temperature of the fixing unit at the time of non-image formation of at least one of warm-up and cool-down detected by the detection unit. An image forming apparatus characterized by this is described.

Japanese Patent Laid-Open No. 2006-118631 Japanese Patent Laid-Open No. 2006-95418

  When the heat insulating material is inserted into the contact portion between the heating member and the continuous recording medium, the heat insulating material may not be reliably inserted.

  The present invention uses the rigidity of the heat insulating material so that the heat insulating material is pushed in so that the heat insulating material is reliably inserted into the contact portion as compared with the case where the heat insulating material is inserted into the contact portion between the heating member and the continuous recording medium. It is an object of the present invention to provide an image forming apparatus, a fixing apparatus, and a heat insulating material that can be inserted into the apparatus.

The present invention according to claim 1
An image forming unit for forming a toner image on the surface of the continuous recording medium;
A heating member that contacts the continuous recording medium on which the toner image is formed and heats the continuous recording medium in contact with the toner image;
A heat insulating material inserted into a contact portion where the heating member and the continuous recording medium come into contact;
A moving mechanism for moving the heat insulating material between a first position inserted between the heating member and the continuous recording medium and a second position spaced apart from the continuous recording medium and the heating member;
Have
The heat insulating material is connected to a connecting portion so as to protrude from both end sides in the moving direction,
The moving mechanism is an image forming apparatus that moves the heat insulating material so as to be pulled into the contact portion via the connecting portion.

  The present invention according to claim 2 is the image forming apparatus according to claim 1, wherein the moving mechanism includes a winding unit that winds up the heat insulating material from one end side.

  According to a third aspect of the present invention, the winding unit moves the heat insulating material from the upstream side of the contact portion in the moving direction of the continuous recording medium to the downstream side of the contact portion in the moving direction of the continuous recording medium. The image forming apparatus according to claim 2, wherein the heat insulating material is wound up so that the heat insulating material is wound.

  The present invention according to claim 4 is the image forming apparatus according to any one of claims 1 to 3, wherein the moving mechanism further includes another winding unit that winds the heat insulating material from the other end side.

  The present invention according to claim 5 is characterized in that the other winding unit is configured such that the heat insulating material extends from the downstream side of the contact portion in the moving direction of the continuous recording medium to the upstream side of the contact portion in the moving direction of the continuous recording medium. The image forming apparatus according to claim 4, wherein the heat insulating material is wound up so as to move.

  The present invention according to claim 6 further includes a pressing member that contacts the surface of the continuous recording medium opposite to the surface on which the heating member contacts, and presses the continuous recording medium against the heating member. 5. The image forming apparatus according to any one of 5 above.

  The present invention according to claim 7 is the image forming apparatus according to claim 6, wherein the pressing member moves between a contact position in contact with the heating member and a separated position separated from the heating member.

  The present invention according to claim 8 further includes an auxiliary heating member that contacts the surface of the continuous recording medium opposite to the surface that contacts the heating member and heats the continuous recording medium. The image forming apparatus described.

  The present invention according to claim 9 is the image forming apparatus according to claim 8, wherein the auxiliary heating member moves between a contact position where the auxiliary heating member is in contact with the heating member and a separated position where the auxiliary heating member is separated from the heating member.

The present invention according to claim 10 provides:
The heat insulating material is
A first layer formed from a thermally insulating material;
A second layer that is in contact with the continuous recording medium and has a lower dynamic friction coefficient than the first layer on the surface that contacts the continuous recording medium;
An image forming apparatus according to claim 1, comprising:

  In the eleventh aspect of the present invention, the heat insulating material further includes a third layer in contact with the heating member, and a dynamic friction coefficient of a surface in contact with the heating member is lower than that of the first layer. The image forming apparatus described.

  The present invention according to claim 12 is the image forming apparatus according to any one of claims 1 to 11, further comprising a spraying device that blows air between the continuous recording medium and the heat insulating material.

  The present invention according to claim 13 is the image forming apparatus according to claim 12, wherein the spraying device blows air from the upstream side in the transport direction of the continuous recording medium toward the downstream side in the transport direction of the continuous recording medium. .

  According to a fourteenth aspect of the present invention, in the heat insulating material according to the twelfth or thirteenth aspect, there is provided a guide portion that guides the air blown by the blowing device so as to spread in a direction intersecting with a direction in which the continuous recording medium moves. This is an image forming apparatus.

The present invention according to claim 15 provides:
A heating member that contacts the continuous recording medium on which the toner image is formed and heats the continuous recording medium in contact with the toner image;
A heat insulating material inserted into a contact portion where the heating member and the continuous recording medium come into contact;
A moving mechanism for moving the heat insulating material between a first position inserted between the heating member and the continuous recording medium and a second position spaced apart from the continuous recording medium and the heating member;
Have
The heat insulating material is connected to a connecting portion so as to protrude from both end sides in the moving direction,
The moving mechanism is a fixing device that moves the heat insulating material so as to be drawn into the contact portion via the connecting portion.

The present invention according to claim 16 provides:
Inserted between the continuous recording medium and a heating member that contacts the continuous recording medium on which the toner image is formed and heats the continuous recording medium;
Moving between a first position inserted between the heating member and the continuous recording medium and a second position spaced apart from the continuous recording medium and the heating member;
It is the heat insulating material which the connection part is connected so that it may each protrude from the both ends in a moving direction, and moves so that it may be drawn in to the said contact part via the said connection part.

  According to the first aspect of the present invention, the heat insulating material is pushed into the contact portion by using the rigidity of the heat insulating material, compared with the case where the heat insulating material is inserted into the contact portion. An image forming apparatus that can be inserted can be provided.

  According to the second aspect of the present invention, the moving mechanism can be downsized as compared with the case where the heat insulating material is moved without being wound up.

  According to the third aspect of the present invention, the heat insulating material is continuously moved from the downstream side of the contact portion in the moving direction of the continuous recording medium to the upstream side of the contact portion in the moving direction of the continuous recording medium. It is possible to make the recording medium less likely to sag.

  According to this invention which concerns on Claim 4, compared with the case where it moves without winding up a heat insulating material, a moving mechanism can be reduced in size.

  According to the fifth aspect of the present invention, the heat insulating material can be moved in two directions so as to reciprocate the heat insulating material in the moving direction of the subsequent recording medium.

  According to the sixth aspect of the present invention, the continuous recording medium can be reliably brought into contact with the heating member as compared with the case where the pressing member is not provided.

  According to the seventh aspect of the present invention, it is possible to easily attach the continuous recording medium as compared with the case where the pressing member does not move to the separation position.

  According to the eighth aspect of the present invention, the continuous recording medium can be reliably heated as compared with the case where the auxiliary heating member is not provided.

  According to the ninth aspect of the present invention, the continuous recording medium can be easily attached as compared with the case where the heating member does not move to the separated position.

  According to the tenth aspect of the present invention, as a case where the second layer is not provided, the continuous recording medium can be smoothly moved.

  According to the present invention of the eleventh aspect, it is possible to smoothly move the heat insulating material as compared with the case where the third layer is not provided.

  According to the twelfth aspect of the present invention, the temperature increase of the continuous recording medium can be suppressed as compared with the case where the spraying device is not provided.

  According to the thirteenth aspect of the present invention, continuous recording by blowing air as compared to the case of blowing air from the downstream side in the conveyance direction of the continuous recording medium toward the upstream side in the conveyance direction of the continuous recording medium. It is possible to make it difficult to cause poor conveyance of the medium.

  According to the fourteenth aspect of the present invention, the recording medium can be uniformly cooled in the direction intersecting with the direction in which the continuous recording medium moves, as compared with the case where the guide portion is not provided.

  According to the present invention according to claim 15, the rigidity of the heat insulating material is used so that the heat insulating material is pushed in, and the heat insulating material is reliably inserted into the contact portion as compared with the case where the heat insulating material is inserted into the contact portion. A fixing device that can be inserted can be provided.

  According to the sixteenth aspect of the present invention, the heat insulating material is reliably inserted into the contact portion as compared with the case where the heat insulating material is inserted into the contact portion using the rigidity of the heat insulating material. A heat insulating material that can be inserted can be provided.

1 is a diagram illustrating a schematic configuration of an image forming apparatus used in an embodiment of the present invention. It is a figure which shows a fixing device and a cooling device. FIG. 3 is a diagram illustrating a configuration in the vicinity of a fixing device. It is a figure which shows the surface of the side which contact | connects the main heating roll of the heat insulation sheet of the state expanded. It is a figure which shows the cross section of a heat insulation sheet. It is a figure which shows the state which a heat insulation sheet contacts with a main heating roll. FIG. 7A is a diagram showing the heat insulation sheet in the first position, and FIG. 7B is a diagram showing the heat insulation sheet in the second position. It is a figure which shows the surface of the side which contact | connects the continuous paper of the heat insulation sheet of the state which extended.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an image forming apparatus 10 according to an embodiment of the present invention. As shown in FIG. 1, the image forming apparatus 10 includes a supply unit 50, a collection unit 60, and an image forming unit 100.

  The supply unit 50 is a unit that supplies the continuous paper P wound in a roll shape to the image forming unit 100. Here, the continuous paper P is an example of a continuous recording medium. The supply unit 50 includes a feeding device 52 that feeds the continuous paper P by rotating and a slack prevention device 54 that prevents the continuous paper P from slackening.

  The collection unit 60 is a device that collects the continuous paper P on which an image is formed by the image forming unit 100, and is a winding device 62 that winds up the continuous paper P, and a loosening prevention device 64 that prevents the continuous paper P from being loosened. And have.

  The image forming unit 100 includes an image forming unit main body 112, and an image forming unit 120 that forms a toner image on the surface of the continuous paper P is disposed in the image forming unit main body 112.

  The image forming unit 120 includes a toner image forming unit 130Y that forms a yellow toner image, a toner image forming unit 130M that forms a magenta toner image, a toner image forming unit 130C that forms a cyan toner image, and a black image. A toner image forming unit 130K that forms a toner image.

  The image forming unit 120 further includes a transfer device 140. The transfer device 140 includes an intermediate transfer body 142, and toner images formed respectively by the toner image forming unit 130 </ b> Y, the toner image forming unit 130 </ b> M, the toner image forming unit 130 </ b> C, and the toner image forming unit 130 </ b> K are transferred to the intermediate transfer member 142. The toner image transferred and transferred to the intermediate transfer body 142 is further transferred onto the continuous paper P.

  A fixing device 200 is further disposed in the image forming unit main body 112. The fixing device 200 fixes the toner image transferred onto the continuous paper P onto the continuous paper P using heat. Details of the fixing device 200 will be described later.

  A cooling device 600 is further arranged in the image forming unit main body 112. The cooling device 600 cools the continuous paper P heated by the fixing device 200. Details of the cooling device 600 will be described later.

  In the image forming apparatus main body, conveyance rolls 70, 72, 74, 76, and 80 that support the continuous paper P and convey the continuous paper P are further arranged. Note that the arrows in FIG. 1 indicate the conveyance direction (movement direction) of the continuous paper P.

  FIG. 2 shows the fixing device 200 and the cooling device 600. In FIG. 2, for convenience of illustration, illustration of a heat insulating sheet 300 described later and a moving mechanism 400 described later is omitted. As shown in FIG. 2, the fixing device 200 includes a main heating roll 210. The main heating roll 210 is an example of a heating member, and contacts the surface of the continuous paper P on which the toner image is formed, which is opposite to the surface on which the toner image is transferred, and heats the continuous paper P. A heat source 212 such as a halogen lamp is provided inside the main heating roll 210. The continuous paper P is guided to the surface of the main heating roll 210 by the transport roll 72 and moves so as to be wound around the surface of the main heating roll 210.

  The fixing device 200 further includes an auxiliary heating roll 220. The auxiliary heating roll 220 is an example of an auxiliary heating member, and has a heat source 222 such as a halogen lamp, for example, and the surface of the continuous paper P opposite to the surface on which the main heating roll 210 contacts, that is, continuous paper. The continuous paper P is heated in contact with the surface on which the P toner image is transferred. The auxiliary heating roll 220 is an example of a pressing member. The auxiliary heating roll 220 is in contact with the surface of the continuous paper P on the side opposite to the surface on which the main heating roll 210 is in contact. The continuous paper P is pressed against the main heating roll so as to be sandwiched.

  Further, the auxiliary heating roll 220 is capable of hitting movement between a contact position that contacts the main heating roll 210 shown by a solid line in FIG. 2 and a separation position of the main heating roll 210 shown by a two-dot chain line in FIG.

  The cooling device 600 includes a support member 610 that supports the continuous paper P so as to be wound, and a plurality of cooling units 620 arranged around the support member 610, for example.

  In the following description, a portion where the main heating roll 210 and the continuous paper P are in contact (a portion where the continuous paper P is wound around the main heating roll 210) is referred to as a contact portion N.

  In the image forming apparatus 10 configured as described above, it is necessary to preheat the main heating roll 210 and the auxiliary heating roll 220 until reaching a predetermined temperature before starting image formation. When image formation is started from a state in which the continuous paper P is mounted on the fixing device 200 in advance, the continuous paper P is still wound around the main heating roll 210 and the continuous paper P is stopped. It is necessary to preheat the main heating roll 210 in the state. At this time, since the portion of the continuous paper P that contacts the main heating roll 210 may be excessively heated, it is desirable to block or suppress heat conduction from the main heating roll 210 to the continuous paper P.

  FIG. 3 shows a configuration in the vicinity of the fixing device 200. As illustrated in FIG. 3, the image forming apparatus 10 includes a heat insulating sheet 300. The heat insulating sheet 300 is an example of a heat insulating material, and a contact portion N (see FIG. 2) where the main heating roll 210 and the continuous paper P are in contact is inserted. The heat insulating sheet 300 is movable in the movement direction indicated by the arrows a1 and a2.

  A connecting portion 380 is connected to the heat insulating sheet 300 so as to protrude from both end sides in the moving direction.

  As shown in FIG. 3, the image forming apparatus 10 further includes a moving mechanism 400. The moving mechanism 400 includes a first position where the heat insulating sheet 300 is inserted into the contact portion N which is the position shown in FIG. 3, and a second position which is separated from the contact portion N (see FIG. 7B). And has a first winding part 410 and a second winding part 420.

  The 1st winding part 410 is a mechanism which winds up the heat insulation sheet 300 from one end side, has the rotating shaft 412 to which the connection part 380 was fixed, and the rotation part 412 rotates in the arrow b1 direction, and the connection part 380 is rotated. The heat insulating sheet 300 is moved in the direction of the arrow a1 so as to wind up the heat insulating sheet 300. That is, the first winding unit 410 has the connection part 380 and the heat insulation so as to move the heat insulation sheet 300 from the upstream side of the contact part N in the movement direction of the heat insulation sheet 300 to the downstream side in the movement direction of the heat insulation sheet 300. The sheet 300 is wound up.

  The 2nd winding part 420 is an example of the other winding part which winds up the heat insulation sheet 300 from the other end side, Comprising: It has the rotating shaft 422 to which the connection part 380 was fixed, and the rotating shaft 422 is the arrow b2 direction. The heat insulating sheet 300 is moved in the direction of the arrow a <b> 2 so as to wind up the connecting portion 380 and the heat insulating sheet 300. That is, the second winding unit 420 is configured so that the heat insulating sheet 300 is moved from the downstream side of the contact portion N in the moving direction of the heat insulating sheet 300 to the upstream side in the moving direction of the heat insulating sheet 300. The sheet 300 is wound up.

  As shown in FIG. 3, the image forming apparatus 10 further includes a fan device 500. The fan device 500 is an example of a spray device, and blows air between the continuous paper P and the heat insulating sheet 300. The fan device 500 may be disposed so as to blow air from the upstream side in the conveyance direction of the continuous paper P toward the downstream side in the conveyance direction of the continuous paper P, as indicated by a solid line in FIG. As indicated by a two-dot chain line in FIG. 3, the air may be blown from the downstream side in the transport direction of the continuous paper P toward the upstream side in the transport direction of the continuous paper P.

  FIG. 4 shows a surface on the side in contact with the main heating roll 210 of the heat insulating sheet 300 in the spread state. As described above, the connecting portion 380 is attached to the heat insulating sheet 300. More specifically, one connecting portion 380 is attached to the heat insulating sheet 300 in the vicinity of both end portions in the direction intersecting the moving direction of the heat insulating sheet.

  FIG. 5 shows a cross section of the heat insulating sheet 300. As illustrated in FIG. 3, the heat insulating sheet 300 includes a first layer 310, a second layer 312, and a third layer 314. The first layer 310 is made of a heat insulating material. As a specific material of the first layer 310, for example, a felt-like silicon sponge can be used. The first layer 310 is preferably formed of a flexible material so that it can be deformed following the main heating roll 210. The first layer 310 is preferably formed of a material having heat resistance that can withstand heat of about 160 to 200 degrees which is the surface temperature of the main heating roll 210.

  The second layer 312 is a layer that is in contact with the continuous paper P, and has a lower dynamic friction coefficient than that of the first layer 310 at least on the surface that is in contact with the continuous paper P. Specific examples of the material for the second layer include a fluororesin film, a fluororesin film, and a polyimide sheet.

  The third layer 314 is a layer that is in contact with the main heating roll 210, and has a lower dynamic friction coefficient than that of the first layer 310 at least on the surface that is in contact with the main heating roll 210. Specific examples of the material for the third layer include a fluororesin film, a fluororesin film, and a polyimide sheet. As shown in FIG. 3, the connecting portion 380 is attached to the third layer 314 so as to protrude toward the main heating roll 210.

  The thickness t of the heat insulating sheet 300 is, for example, 5 mm to 10 mm.

  FIG. 6 shows a state where the heat insulating sheet 300 is in contact with the main heating roll 210. As shown in FIG. 6, the main heating roll 210 is formed with step portions 214 and 214 on both ends in the longitudinal direction. And the heat insulation sheet 300 will be in the state which contacts the main heating roll 210 so that the connection parts 380 and 380 may fit in the level | step-difference parts 214 and 214. FIG.

  FIG. 7 illustrates the operation of the moving mechanism 400. FIG. 7 (A) is a diagram showing the heat insulating sheet 300 in the first position, and FIG. 7 (B) is in the second position. It is a figure which shows a certain heat insulation sheet.

  When the rotating shaft 412 rotates in the arrow b1 direction from the first state shown in FIG. 7A, the connecting portion 380 and the heat insulating sheet 300 are wound around the rotating shaft 412, and the connecting portion 380 and the heat insulating sheet 300 are moved to the arrow. It moves to a1 direction and will be in the 2nd state shown to FIG. 7 (B). 7B, when the rotating shaft 422 rotates in the direction of the arrow b2, the connecting portion 380 and the heat insulating sheet 300 are wound around the rotating shaft 422, and the connecting portion 380 and the heat insulating sheet 300 are wound. Moves in the direction of the arrow a2 to be in the first state shown in FIG.

  Further, from the first state shown in FIG. 7A, when the rotation shaft 422 rotates in the arrow b2 direction, the connecting portion 380 and the heat insulating sheet 300 move in the arrow a2 direction, and the connecting portion 380 and the heat insulating sheet 300 are moved. It will be in the state (not shown) wound by the rotating shaft 422. Further, when the rotating shaft 412 rotates in the arrow b1 direction from the state where the connecting portion 380 and the heat insulating sheet 300 are wound around the rotating shaft 422, the connecting portion 380 and the heat insulating sheet 300 move in the arrow a1 direction, and FIG. The first state shown in FIG.

  In FIG. 8, the heat insulating sheet 300 in the unfolded state is shown from the surface on the side in contact with the continuous paper P. As shown in FIG. 8, a groove 330 is formed on the surface of the heat insulating sheet 300 that contacts the continuous paper P. The groove 330 is an example of a guide unit, and guides the air blown by the fan device 500 so as to spread in a direction intersecting with the direction in which the continuous paper P moves.

DESCRIPTION OF SYMBOLS 10 ... Image forming apparatus 120 ... Image forming part 200 ... Fixing device 210 ... Main heating roll 214 ... Step part 220 ... Auxiliary heating roll 300 ... Thermal insulation sheet 310 ... 1st layer 312 ... 2nd layer 314 ... 3rd layer 330 ... Groove 380 ... Connection part 400 ... Moving mechanism 410 ... 1st winding part 412 ... Rotating shaft 420 ... Winding unit 422 ... Rotating shaft 500 ... Fan device

Claims (16)

An image forming unit for forming a toner image on the surface of the continuous recording medium;
A heating member that contacts the continuous recording medium on which the toner image is formed and heats the continuous recording medium in contact with the toner image;
A heat insulating material inserted into a contact portion where the heating member and the continuous recording medium come into contact;
A moving mechanism for moving the heat insulating material between a first position inserted between the heating member and the continuous recording medium and a second position spaced apart from the continuous recording medium and the heating member;
Have
The heat insulating material is connected to a connecting portion so as to protrude from both end sides in the moving direction,
The image forming apparatus in which the moving mechanism moves the heat insulating material so as to be pulled into the contact portion via the connecting portion.   The image forming apparatus according to claim 1, wherein the moving mechanism includes a winding unit that winds up the heat insulating material from one end side.   The winding unit winds up the heat insulating material so as to move the heat insulating material from the upstream side of the contact portion in the moving direction of the continuous recording medium to the downstream side of the contact portion in the moving direction of the continuous recording medium. The image forming apparatus according to claim 2.   The image forming apparatus according to claim 1, wherein the moving mechanism further includes another winding unit that winds the heat insulating material from the other end side.   The other winding unit moves the heat insulating material so as to move the heat insulating material from the downstream side of the contact portion in the moving direction of the continuous recording medium to the upstream side of the contact portion in the moving direction of the continuous recording medium. The image forming apparatus according to claim 4, which is wound up.   6. The image forming apparatus according to claim 1, further comprising a pressing member that contacts a surface of the continuous recording medium opposite to the surface on which the heating member contacts, and presses the continuous recording medium against the heating member.   The image forming apparatus according to claim 6, wherein the pressing member moves between a contact position in contact with the heating member and a separated position separated from the heating member.   6. The image forming apparatus according to claim 1, further comprising an auxiliary heating member that is in contact with a surface of the continuous recording medium that is opposite to a surface that contacts the heating member and that heats the continuous recording medium.   The image forming apparatus according to claim 8, wherein the auxiliary heating member moves between a contact position that contacts the heating member and a separated position that is separated from the heating member. The heat insulating material is
A first layer formed from a thermally insulating material;
A second layer that is in contact with the continuous recording medium and has a lower dynamic friction coefficient than the first layer on the surface that contacts the continuous recording medium;
An image forming apparatus according to claim 1, comprising:   11. The image forming apparatus according to claim 10, wherein the heat insulating material further includes a third layer that contacts the heating member and has a dynamic friction coefficient of a surface that contacts the heating member that is lower than that of the first layer.   The image forming apparatus according to claim 1, further comprising a spraying device that blows air between a continuous recording medium and the heat insulating material.   The image forming apparatus according to claim 12, wherein the spraying device blows air from an upstream side in a conveyance direction of the continuous recording medium toward a downstream side in the conveyance direction of the continuous recording medium.   The image forming apparatus according to claim 12, wherein the heat insulating material has a guide portion that guides the air blown by the blowing device so as to spread in a direction intersecting with a direction in which the continuous recording medium moves. A heating member that contacts the continuous recording medium on which the toner image is formed and heats the continuous recording medium in contact with the toner image;
A heat insulating material inserted into a contact portion where the heating member and the continuous recording medium come into contact;
A moving mechanism for moving the heat insulating material between a first position inserted between the heating member and the continuous recording medium and a second position spaced apart from the continuous recording medium and the heating member;
Have
The heat insulating material is connected to a connecting portion so as to protrude from both end sides in the moving direction,
The moving mechanism is a fixing device that moves the heat insulating material so as to be drawn into the contact portion via the connecting portion. Inserted between the continuous recording medium and a heating member that contacts the continuous recording medium on which the toner image is formed and heats the continuous recording medium;
Moving between a first position inserted between the heating member and the continuous recording medium and a second position spaced apart from the continuous recording medium and the heating member;
The heat insulating material which a connection part is connected so that it may each protrude from the both ends in a moving direction, and moves so that it may be drawn in to the said contact part via the said connection part.

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