JP2004077728A - Image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the occurrence of separating failure that a paper sheet is wrapped up in secondary transfer of a toner image from an intermediate transfer body to the paper sheet when carrying out both sides printing by using various kinds of paper sheets. <P>SOLUTION: In the image forming apparatus, an image is formed by superposing and nipping a toner image on an intermediate transfer body, moving while carrying the toner image on/with the recording medium, and passed through a fixing position by carrying the recording medium on which the toner image is transferred by a transporting member. A transfer roll 28 forming a nip part 33 by having an intermediate transfer body 21 inserted between a specified roll 25 among a plurality of rolls and a guiding member 35 in which one side is expanded in a close vicinity of the transfer roll are provided. In guiding member 35, the space formed between the transfer roll 28 is narrower in both end parts than in the central part when installed in the specified position. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electrophotographic image forming apparatus used for a copying machine, a printer, and the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in an electrophotographic image forming apparatus used for a copying machine or a printer capable of forming a color image, a direct transfer in which an unfixed toner image is directly multiplex-transferred to a recording medium conveyed by conveying means such as a conveying belt. The method is disadvantageous in that the image quality of a color image that is multiplex-transferred onto a recording medium is affected by various factors such as the thickness and surface characteristics of the recording medium. An image forming apparatus of the intermediate transfer type, in which a multi-color toner image is temporarily transferred once and then re-transferred from the intermediate transfer member to a recording medium to eliminate those instability factors, is widely used.
[0003]
This image forming apparatus of the intermediate transfer system temporarily superimposes the toner images of the respective colors formed on the photoreceptor on an intermediate transfer belt or an intermediate transfer drum and performs primary transfer, and the intermediate transfer belt or the intermediate transfer drum The paper conveyed from the paper tray is superimposed on the multi-color toner image multi-transferred thereon, conveyed to the secondary transfer position, and the multi-color toner image is secondarily transferred onto the paper at the secondary transfer position. Further, the multi-color toner image is heated and pressed to be fixed on a sheet to form a color image.
[0004]
However, at the secondary transfer position, the paper and the intermediate transfer body are generally pressed by the secondary transfer roll and the opposing roll with the multicolor toner image interposed therebetween, and a bias voltage is applied from the secondary transfer roll to the paper. Is applied, the sheet often sticks to the intermediate transfer member, and it is necessary to peel the sticking sheet from the intermediate transfer member.
[0005]
As a method for peeling the paper, a mechanical peeling method in which a peeling claw is slid in contact with the intermediate transfer body to forcibly peel off the paper, and a peeling static eliminator is arranged downstream of the secondary transfer position to prevent corona discharge or the like 2. Description of the Related Art A charge removing and peeling method of removing a sheet to remove the sheet and reducing the electrostatic attraction force between the intermediate transfer member and the sheet to peel the sheet is widely used.
[0006]
The mechanical peeling method may damage the paper and the intermediate transfer member, and the charge removing peeling method loses the electrostatic attraction of the multicolor toner image transferred onto the paper when the paper is discharged, and the toner is removed. There is a risk of scattering.
[0007]
In order to solve this problem, Japanese Unexamined Patent Application Publication No. 11-305555 discloses a method in which a separation electrode member facing the sheet is provided downstream of the secondary transfer position and extends in the width direction of the sheet. There has been disclosed a technique for avoiding disturbance of a toner image due to toner scattering by applying a bias voltage for peeling, and avoiding poor peeling of paper.
[0008]
[Problems to be solved by the invention]
However, according to the mechanical peeling method, the charge removing peeling method, or the technique disclosed in Japanese Patent Application Laid-Open No. H11-305555, the method is effective for the peeling failure in which the paper sticks to the intermediate transfer body. When double-sided printing is performed on thin paper of a size that requires transfer using the entire width, there is a problem that there is no improvement effect.
[0009]
In other words, when printing is performed on one surface and the toner image is fixed by heating and pressing, curling occurs in which both ends of the paper face upward. At the time of transfer, curls at both ends of the sheet which face downward this time are wrapped around the secondary transfer roll, or are caught by the guide member provided at the exit of the secondary transfer position, thereby causing poor sheet separation. .
[0010]
The present invention has been made in view of the above circumstances, and when performing double-sided printing using various types of paper, when the toner image is secondarily transferred from the intermediate transfer member to the paper, the peeling defect that the paper is wound around the secondary transfer roll. It is an object of the present invention to provide an image forming apparatus capable of preventing the occurrence of an image.
[0011]
[Means for Solving the Problems]
A first image forming apparatus of the present invention that achieves the above object is to overlap a recording medium with a toner image on an intermediate transfer body that is stretched on a plurality of rolls and carries a toner image, and nips the recording medium. An image forming apparatus that transfers the toner image by using a recording medium having the transferred toner image on a conveying member and passes the fixing position to form an image composed of the toner image fixed on the recording medium. ,
A transfer roll that forms a nip portion with the intermediate transfer body interposed between a predetermined roll of the plurality of rolls,
A guide member that guides the recording medium that has come out of the nip portion to the transport member, and has a guide member having one side that spreads close to the transfer roll,
The guide member is characterized in that a gap formed between the guide member and the transfer roll when disposed at a predetermined position is narrower at both ends than at the center of the one side.
[0012]
As described above, when the guide member is incorporated, the gap formed between the transfer member and the transfer roller has a shape in which both ends are narrower than the center of one side of the guide member. During operation, the gap between the center and both ends becomes almost uniformly narrow due to thermal expansion, and the recording medium that comes out of the nip is guided by the guide member, preventing peeling defects such as winding around the transfer roll. Can be.
[0013]
A second image forming apparatus according to the present invention, which achieves the above object, overlaps a recording medium on a toner image on an intermediate transfer member which is stretched around a plurality of rolls and carries a toner image, and nips the recording medium. An image forming apparatus that transfers the toner image by using a recording medium having the transferred toner image on a conveying member and passes the fixing position to form an image composed of the toner image fixed on the recording medium. ,
A transfer roll that forms a nip portion with the intermediate transfer body interposed between a predetermined roll of the plurality of rolls,
A guide member that guides the recording medium coming out of the nip portion to the transport member, and a guide member that has one side that spreads close to the transfer roll;
The guide member is characterized in that a film member for closing a gap formed between the guide member and the transfer roll is attached.
[0014]
As described above, the film member is stuck to the guide member, and the gap formed between the film member and the transfer roll is closed, so that the peeling failure such as the recording medium coming out of the nip portion is wound around the transfer roll. Can be prevented.
[0015]
According to a third image forming apparatus of the present invention, which achieves the above object, a recording medium is overlapped with a toner image on an intermediate transfer member which is stretched around a plurality of rolls and carries a toner image, and is nipped. An image forming apparatus that transfers the toner image by using a recording medium having the transferred toner image on a conveying member and passes the fixing position to form an image composed of the toner image fixed on the recording medium. ,
A transfer roll that forms a nip portion with the intermediate transfer body interposed between a predetermined roll of the plurality of rolls,
A guide member that guides the recording medium coming out of the nip portion to the transport member, and a guide member that has one side that spreads close to the transfer roll;
The guide member is a member to which a film member that closes each gap formed between both ends of the one side and the transfer roll among the gaps formed between the transfer roll and the transfer roll is attached. It is characterized by.
[0016]
As described above, the film members are stuck to both ends of the guide member, and a part of the gap formed between the guide member and the transfer roll is closed at two places. It is possible to prevent peeling failure such as winding around the transfer roll and to minimize the accumulation of fog toner, so that the stain on the back surface of the paper can be minimized.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described.
[0018]
FIG. 1 is a schematic configuration diagram showing a first embodiment of a color copying machine to which the image forming apparatus of the present invention is applied.
[0019]
The image forming apparatus shown in FIG. 1 includes photoconductor drums 11Y, 11M, which rotate in the A direction on which yellow (Y), magenta (M), cyan (C), and black (K) toner images are formed, respectively. Four 11C and 11K are juxtaposed. Further, the intermediate transfer belt 21, which is stretched over the drive roll 22, the driven roll 23, the tension roll 24, and the opposing roll 25, circulates in the B direction while contacting each of the four photosensitive drums 11Y, 11M, 11C, and 11K. Have. Around each photoconductor drum 11, each of chargers 12Y, 12M, 12C, and 12K for charging the photoconductor drum 11 exposes the photoconductor drum 11 charged based on image data decomposed for each color. Exposure devices (not shown) that form an electrostatic latent image by irradiating the electrostatic latent image, and developing devices that form the toner image by developing the electrostatic latent image with toner of each color of Y, M, C, and K from a close position Devices 14Y, 14M, 14C, and 14K, each primary transfer that opposes each photoconductor drum 11 with the intermediate transfer belt 21 interposed therebetween, and primarily transfers the toner image formed on the photoconductor drum 11 to the intermediate transfer belt 21 Rolls 27Y, 27M, 27C, and 27K, and blade-type cleaning devices 16Y, 16M, 16C, and 16K that clean the toner remaining on the photosensitive drum 11 after transfer with a blade are provided. It is gills. Further, a secondary transfer roll 28 for secondary-transferring the toner image onto the paper P, which is opposed to the opposing roll 25 with the intermediate transfer belt 21 interposed therebetween and is superimposed on the toner image on the intermediate transfer belt 21, is provided from a paper tray (not shown). A chute 34 for feeding the conveyed sheet P to the secondary transfer roll 28, a guide member 35 for guiding the sheet P, on which the toner image has been secondarily transferred, coming out of the secondary transfer roll 28, to a conveying belt 36, a toner image A transport belt 36 that transports the paper P on which the secondary transfer is performed to the fixing device 30, and a heating roll 31 and a pressure roll 32 that fix the toner image on the paper P transported by the transport belt 36 onto the paper P. A fixing device 30 is provided.
[0020]
The secondary transfer roll 28 is provided with a peeling electrode member 28a for removing electricity from the sheet, and the intermediate transfer belt is provided with a belt cleaning device 38.
[0021]
The surface of the photosensitive drum 11 uniformly charged by the charger 12 is irradiated with a pulse width-modulated exposure light from an exposure device (not shown) based on image data decomposed for each color. An image is formed, and the electrostatic latent image is developed with each color toner of the developing device 14 to form a toner image of each color on the surface of the photosensitive drum 11. The respective color toner images on the photosensitive drum 11 are sequentially multiplex-transferred onto the intermediate transfer belt 21 by the primary transfer roll 27, and the multiplex-transferred color toner images are transferred onto the paper P by the secondary transfer roll 28. The toner image on the sheet P is further fixed on the sheet by the fixing device 30 to form an image including the fixed toner image.
[0022]
FIG. 2 is a diagram illustrating the relationship between the secondary transfer roll and the opposing roll.
[0023]
As shown in FIG. 2, the secondary transfer roll 28 and the opposing roll 25 oppose each other with the intermediate transfer belt 21 interposed therebetween to form a transfer nip portion 33. The normal Y of the surface of the intermediate transfer belt 21 in the transfer nip 33 is 12 degrees with respect to the line X connecting the center of the secondary transfer roll 28 and the center of the opposing roll 25, and the moving direction of the intermediate transfer belt 21 is It is inclined to the B side. For this reason, the sheet P that has passed through the transfer nip 33 is easily peeled off from the intermediate transfer belt 21. However, in order to fix the toner image on the first side when printing on both sides, the paper P heated and pressed by a fixing device (not shown) curls upward, and the toner image is secondarily transferred to another side. For this reason, when the sheet is reversed and passes through the transfer nip portion 33, the sheet curls downward, so that thin paper or the like is wrapped around the secondary transfer roll 28 and peeling failure easily occurs. The curl of the sheet P occurs remarkably at the end of the sheet P.
[0024]
FIG. 3 is an enlarged schematic view of the periphery of the secondary transfer roll.
[0025]
In FIG. 3, the secondary transfer roll 28 faces the opposing roll 25 with the intermediate transfer belt 21 interposed therebetween, and forms a transfer nip 33. Upstream of the transfer nip 33, a chute 41 for superposing the paper P conveyed from a paper tray (not shown) on the intermediate transfer belt 21 and sending it to the transfer nip 33 is provided. A guide member 35 is provided, which guides the sheet P passing through the nip portion 33 to a transport belt (not shown), and one side of which spreads close to the secondary transfer roll 28. The guide member 35 has a shape in which both ends of one side protrude like a bow toward the secondary transfer roll 28, and when incorporated in the image forming apparatus, a gap formed between the guide member 35 and the secondary transfer roll 28 is located at the center of one side. Both ends are narrower. However, at the time of operation, the center gap is reduced due to thermal expansion, and is substantially equal to the gap at both ends.
[0026]
Therefore, the sheet curled downward cannot pass through the narrow gap, and is guided along the guide member and sent to a transport belt (not shown).
[0027]
FIG. 4 is a schematic front view showing the relationship between the secondary transfer roll and the guide member.
[0028]
4, when incorporated in the image forming apparatus, a guide member 35 having a shape in which both ends of one side 35a protrude like a bow toward the secondary transfer roll 28 is disposed close to the secondary transfer roll 28. Therefore, in the gap 34 formed between the guide member 35 and the secondary transfer roll 28, both ends 35c of one side are narrower than the center 35b of one side. However, at the time of operation, the central gap is narrowed due to thermal expansion, and is substantially equal to the gap at both ends. Therefore, the paper P sent from the unillustrated chute at the top of the figure passes through the unillustrated transfer nip portion. Is sent to the lower side of the figure, but the gap 34 formed between the secondary transfer roll 28 and one side 35a of the guide member 35 is narrow. It is sent to a transport roll (not shown) below.
[0029]
Next, the reason why the gap formed between the transfer roll and one side of the guide member when it is incorporated in the image forming apparatus becomes narrower at both ends of one side than at the center will be described.
[0030]
5 to 7 are diagrams schematically illustrating a gap formed by the secondary transfer roll and one side of the guide member. FIG. 5 is a diagram illustrating the gap between one side of the guide member and the secondary transfer roll of the present embodiment. FIG. 6 shows a guide member of a comparative example in which one side is linear, and FIG. 7 shows a guide member of the present embodiment in which both ends of one side are overhanging.
[0031]
In FIG. 5, the gap 34 formed between the secondary transfer roll 28 and one side 35a of the guide member 35 is narrower at both ends 35c than at the center 35b of one side. The gap interval is, for example, 1.0 mm at the center and 0.5 mm or less at both ends, preferably 0.2 mm to 0.3 mm.
[0032]
Here, since the change amount of the diameter φ of the secondary transfer roll 28 is as small as 1/10 or less as compared with the gap interval, the gap interval is the interval between the axis 28b of the secondary transfer roll and one side 35a. The center is set so as to have an interval difference of 0.5 mm or more compared to both ends. For example, the center is (φ / 2 + 1.0) mm, and both ends are (φ / 2 + 0.5) mm. Is also good.
[0033]
In FIG. 6, the dotted line shows the shape when the guide member thermally expands.
[0034]
In the image forming apparatus of the present embodiment, the secondary transfer roll 28, the peeling electrode member, and the guide member 39 constitute a secondary transfer roll unit, and the secondary transfer roll 28 having a metal shaft and the metal peeling electrode member The plastic guide member 39 is housed in a plastic housing, and is integrated with the housing. The secondary transfer roll unit expands under the influence of heat exceeding 100 degrees of the fixing device, but the plastic guide member is deformed due to the difference in the thermal expansion coefficient between metal and plastic, and the secondary transfer roll 28 and one side are expanded. The gap between and changes. As shown by the dotted line in the figure, the guide member 39 is deformed so that the center is bent with both ends of the secondary transfer roll 28 as fulcrums, so that the change in the gap is small at both ends and large at the center. Therefore, in the guide member 39 of the comparative example in which one side is formed in a straight line, in order to prevent the secondary transfer roll 28 from being damaged by deformation, the gap interval must be increased, and the paper curled downward. Cannot be prevented from winding around the secondary transfer roll 28.
[0035]
In FIG. 7, the dotted line shows the shape when the guide member thermally expands.
[0036]
The guide member 35 of the present embodiment has a shape in which both ends of one side protrude like a bow so that a gap formed at the center of one side is larger than a gap formed at both ends in anticipation of thermal expansion. . Therefore, as shown by the dotted line in the figure, even if the center is bent so that both ends of the secondary transfer roll are fulcrums, the gap interval at both ends hardly changes, but the gap interval at the center becomes small. When the curled paper is peeled, it is possible to prevent a peeling defect that is caught on the guide member.
[0037]
Next, a second embodiment of the present invention will be described.
[0038]
The second embodiment is different from the first embodiment in that one side of the guide member has a linear shape, and the entire gap formed by the one side of the linear shape and the transfer roll is a film adhered to the guide member. The difference is that it is closed by a member. However, since other points are common, differences will be described.
[0039]
FIG. 8 is a schematic front view showing the relationship between the secondary transfer roll and the guide member according to the second embodiment.
[0040]
As shown in FIG. 8, a guide member 40 is arranged close to the secondary transfer roll 28. A film member 37 that covers the entire gap 34 between one side 40a of the guide member and the secondary transfer roll 28 is attached to the guide member 40.
[0041]
Here, when the guide member 40 is made of plastic and the shaft of the transfer roll is made of metal, as shown in FIG. 6 as a comparative example, the guide member 40 made of plastic is formed due to the difference in the coefficient of thermal expansion between metal and plastic. As shown by a dotted line, a gap 34 between the secondary transfer roll 28 and one side 40a is deformed so that the center is bent with both ends of the secondary transfer roll 28 as fulcrums. At that time, in order to prevent the secondary transfer roll 28 from being damaged by deformation, the gap interval must be increased.
[0042]
When the guide member 40 is made of metal, the deformation due to the difference in the coefficient of thermal expansion is reduced. However, if one side of the metal of the guide member 40 comes into contact with the secondary transfer roll, the secondary transfer current leaks and transfer failure occurs. Therefore, it is not possible to make the gap interval too small.
[0043]
In the guide member 40 of the present embodiment, one side 40a has a linear shape, and the gap between the gaps must be widened so that the secondary transfer roll 28 is not damaged. By closing, the curl of the sheet curled downward is prevented from being wound around the secondary transfer roll 28.
[0044]
The film member 37 is, for example, a PET film having a thickness of about 0.5 mm, and presses the secondary transfer roll 28 with a small force of about 0.5 mm at maximum at the center of the secondary transfer roll 28 during thermal expansion. It is attached to such a position. The paper that has passed through the transfer nip and curled downward is prevented from being caught by the guide member 40 when the paper is peeled off and thus causing poor peeling because the gap is closed by such a film member 37. Can be.
[0045]
Here, the guide member 40 of the present embodiment has a shape such that one side 40a is linear, but the one side 40a does not necessarily have to be linear, and the side 40a is not necessarily linear. Similarly, when assembled into the image forming apparatus, both ends may be formed in a shape protruding like a bow.
[0046]
Next, a third embodiment of the present invention will be described.
[0047]
The third embodiment is different from the second embodiment in that a film member for closing both ends of the gap is attached to both ends of the guide member, but the other points are common. The points will be described.
[0048]
FIG. 9 is a schematic front view showing the relationship between the secondary transfer roll and the guide member according to the third embodiment.
[0049]
As shown in FIG. 9, a guide member 40 is arranged near the secondary transfer roll 28. Film members 37a and 37b that close both ends of one side 40a of the gap 34 between the one side 40a of the guide member and the secondary transfer roll 28 are attached to both ends of the guide member 40.
[0050]
The guide member 40 of the present embodiment has a linear shape on one side 40a similarly to the guide member 40 of the second embodiment. , A gap between both ends of one side is set. However, since both ends of the gap must be wider than the gaps at both ends in the first embodiment, the second transfer of the sheet P curled downward by closing the ends of the gap with the film members 37a and 37b, respectively. This prevents winding around the roll 28.
[0051]
Here, the positions where the film members 37a and 37b are attached to both ends of the guide member 40 are determined by the size of the paper P used in the image forming apparatus. It is desirable to attach to the guide member 40 so as to contact the film members 37a and 37b.
[0052]
In the image forming apparatus of the present embodiment, since the center of the gap 34 formed by the one side 40a of the guide member and the secondary transfer roll 28 is not closed, the fog toner adheres to the secondary transfer roll 28, When the film members 37a and 37b scrape the toner, the toner is less likely to accumulate on the film members 37a and 37b, so that the stain on the back surface of the paper can be minimized.
[0053]
Here, the guide member 40 of this embodiment has a shape such that one side 40a is linear, but the one side 40a does not necessarily have to be linear, and is similar to one side of the first embodiment. May have a shape with both ends protruding.
[0054]
【The invention's effect】
As described above, according to the first image forming apparatus of the present invention, the guide member provided at the secondary transfer position has a shape such that the gap between the guide members is uniformly reduced during operation. Even in the case of performing double-sided printing using various types of paper, it is possible to prevent a peeling failure in which the paper is wound around the secondary transfer roll and a peeling failure in which the peeled paper is caught on the guide member. Further, according to the second image forming apparatus of the present invention, since the film member for closing the gap is adhered to the guide member provided at the secondary transfer position, when performing double-sided printing using various types of paper. In addition, it is possible to prevent the peeling failure in which the paper is wound around the secondary transfer roll. Further, according to the third image forming apparatus of the present invention, since the film members for closing both ends of the gap are respectively adhered to the guide member provided at the secondary transfer position, double-sided printing can be performed using various types of paper. Even in the case of performing, it is possible to prevent the peeling failure that the paper is wound around the secondary transfer roll, and it is possible to minimize the accumulation of fog toner, so that the stain on the back surface of the paper can be minimized.
.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram showing a first embodiment of a color copying machine to which an image forming apparatus of the present invention is applied.
FIG. 2 is a diagram illustrating a relationship between a secondary transfer roll and an opposing roll.
FIG. 3 is an enlarged schematic view of the periphery of a secondary transfer roll.
FIG. 4 is a schematic front view showing a relationship between a secondary transfer roll and a guide member.
FIG. 5 is a diagram schematically illustrating a gap formed by a secondary transfer roll and one side of a guide member.
FIG. 6 is a diagram schematically illustrating a gap formed by a secondary transfer roll and one side of a guide member of a comparative example in which one side is linear.
FIG. 7 is a diagram schematically illustrating a gap formed by a secondary transfer roll and one side of a guide member of the present embodiment having a shape in which both ends of one side are protruded.
FIG. 8 is a schematic front view illustrating a relationship between a secondary transfer roll and a guide member according to a second embodiment.
FIG. 9 is a schematic front view illustrating a relationship between a secondary transfer roll and a guide member according to a third embodiment.
[Explanation of symbols]
11, 11Y, 11M, 11C, 11K Photoconductor drums 12, 12y, 12M, 12C, 12K Chargers 14, 14Y, 14M, 14C, 14K Developing units 16, 16Y, 16M, 16C, 16K Cleaning device 21 Intermediate transfer belt 22 Driving roll 23 Follower roll 24 Tension roll 25 Opposing rolls 27, 27Y, 27M, 27C, 27K Primary transfer roll 28 Secondary transfer roll 28a Stripping electrode member 28b Transfer roll shaft 30 Fixing device 31 Heating roll 32 Pressure roll 33 Transfer Nip portions 35, 39, 40 Guide members 35a, 40a One side 35b One side 35c Center 35c One side 36 Both ends 36 Conveyor belt 37 Film members 37a, 37b Film members 38 closing both ends Belt cleaning device 41 Chute

Claims (3)

The toner image is transferred by superimposing and nipping a recording medium on the toner image on an intermediate transfer member that is stretched on a plurality of rolls and carries the toner image, and the toner image is transferred. An image forming apparatus that carries a medium on a conveying member and passes through a fixing position to form an image including a toner image fixed on the recording medium,
A transfer roll that forms a nip portion with the intermediate transfer body interposed between a predetermined roll of the plurality of rolls,
A guide member that guides the recording medium coming out of the nip portion to the transport member, and a guide member that has one side that spreads close to the transfer roll;
An image forming apparatus wherein a gap formed between the guide member and the transfer roll when the guide member is disposed at a predetermined position is narrower at both ends than at the center of the one side. . The toner image is transferred by superimposing and nipping a recording medium on the toner image on an intermediate transfer member that is stretched on a plurality of rolls and carries the toner image, and the toner image is transferred. An image forming apparatus that carries a medium on a conveying member and passes through a fixing position to form an image including a toner image fixed on the recording medium,
A transfer roll that forms a nip portion with the intermediate transfer body interposed between a predetermined roll of the plurality of rolls,
A guide member that guides the recording medium coming out of the nip portion to the transport member, and a guide member that has one side that spreads close to the transfer roll;
The image forming apparatus according to claim 1, wherein the guide member is attached with a film member for closing a gap formed between the guide member and the transfer roller. The toner image is transferred by superimposing and nipping a recording medium on the toner image on an intermediate transfer member that is stretched on a plurality of rolls and carries the toner image, and the toner image is transferred. An image forming apparatus that carries a medium on a conveying member and passes through a fixing position to form an image including a toner image fixed on the recording medium,
A transfer roll that forms a nip portion with the intermediate transfer body interposed between a predetermined roll of the plurality of rolls,
A guide member that guides the recording medium coming out of the nip portion to the transport member, and a guide member that has one side that spreads close to the transfer roll;
The guide member has a film member affixed to each of the gaps formed between the transfer roll and the both ends of the one side of the gap formed between the transfer roll and the transfer roll. An image forming apparatus comprising:

Images