JP2012066897A - Recording medium guide system and image forming system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming system capable of conveying a recording medium to a transfer position in a stable attitude.SOLUTION: The first guide surface 102a of a guide 92 is disposed at a position that intersects with a tangent L6 at a register roll nip position C of a register roll 86. The first guide surface 102a comes in contact with the recording medium conveyed from the register roll 86, and guides the recording medium in the direction of an intermediate transfer surface B. The first guide surface 102a is arranged so that a conveyance distance from the register roll nip position C is made to be a distance M2 which is 1/3 or shorter of a distance M1, the distance M1 being a conveyance distance between the register roll nip position C and a secondary transfer position A.

Description

  The present invention relates to a recording medium guide device and an image forming apparatus.

  Patent Document 1 discloses a lower guide member that contacts a lower surface of a sheet and guides the sheet, and an upper guide member that is located above the lower guide member and contacts the sheet and curves the sheet in a direction along the intermediate transfer member. The at least one of the upper guide member and the lower guide member is coated with resin on at least the contact portion of the upper guide member with the sheet to reduce the frictional force acting on the sheet at the contact portion. An image forming apparatus is disclosed.

  Patent Document 2 discloses an image forming apparatus in which a paper sheet fed from a registration roller is guided to a transfer belt side along a guide member, and is guided to a transfer nip portion via an upper end edge of the guide member. It is disclosed.

JP 2000-112190 A Japanese Patent Laying-Open No. 2005-8391

  An object of the present invention is to provide an image forming apparatus capable of transporting a recording medium in a stable posture.

  The present invention according to claim 1 is the second guide provided so that the recording medium passes between the first guide member and the first guide member and between the first guide member and the first guide member. The first guide member guides one surface of the recording medium, and a contact surface with which the leading end of the transported recording medium hits is upstream of the first guide member in the recording medium transport direction. Provided so that the leading edge of the recording medium crosses the recording medium conveyance direction when the contact surface hits the contact surface and faces in a direction of entering the image holding member, and the second guide member is provided on the recording medium. This is a recording medium guide device that is set so that the other surface of the recording medium comes into contact after the front end enters the image carrier.

  According to a second aspect of the present invention, there is provided the recording according to the first aspect, wherein the second guide member is set such that the other surface of the recording medium hits a leading end portion of the second guide member in the recording medium conveyance direction. It is a medium guidance device.

  According to a third aspect of the present invention, there is provided an image holding member that holds and moves the developer, a transfer unit that transfers the developer held on the image holding member to the recording medium, and a recording medium at a predetermined time. Conveying means, and a recording medium guide device that guides the recording medium conveyed from the conveying means toward the image carrier, the recording medium guide device comprising: a first guide member; A second guide member that faces the first guide member and is provided so that a recording medium passes between the first guide member and the first guide member. In addition to guiding one surface of the medium, a contact surface on which the leading edge of the conveyed recording medium hits is provided on the upstream side in the recording medium transport direction of the first guide member, and the recording medium transport when the contact surface hits the contact surface The tip of the recording medium enters the image carrier crossing the direction That is set to face the direction, the second guide member, the tip of the recording medium is an image forming apparatus that are configured to other surface of the recording medium hits after rush on the image carrier.

  According to a fourth aspect of the present invention, in the image forming apparatus according to the third aspect, the speed at which the transport unit transports the recording medium is faster than the speed at which the image carrier moves.

  According to a fifth aspect of the present invention, the transfer unit is configured such that the transfer member and the backing member are opposed to each other so that the image holding member is sandwiched, and the conveying unit is configured such that the two rotating members are opposed to each other. The recording medium conveyance direction front end portion of the contact surface of the first guide member has a recording medium conveyance distance between the opposite position center of the transfer unit and the opposite position center of the conveyance unit. 5. The image forming apparatus according to claim 3, wherein the image forming apparatus is located closer to the transport unit than a third in the upstream in the transport direction.

  According to a sixth aspect of the present invention, the second guide member is set to come into contact with the recording medium after at least the front end of the recording medium reaches the center of the opposing position of the transfer means. 6. The image forming apparatus according to any one of 5 to 5.

  According to a seventh aspect of the present invention, the first guide member is set so as not to come into contact with the recording medium after the rear end of the recording medium passes through the center of the opposite position of the conveying means. The image forming apparatus according to any one of 3 to 6.

  The present invention according to claim 8 is the image forming apparatus according to any one of claims 3 to 7, wherein the image holding member is an intermediate transfer member.

  According to the first aspect of the present invention, the recording medium can be guided in a stable posture as compared with the case where the present configuration is not provided.

  According to the second aspect of the present invention, the recording medium can be conveyed in a more stable posture as compared with the case where the present configuration is not provided.

  According to the third aspect of the present invention, the recording medium can be guided in a stable posture as compared with the case where the present configuration is not provided.

  According to the fourth aspect of the present invention, in addition to the effect of the third aspect of the invention, it is possible to prevent transfer deviation to the recording medium.

  According to the present invention of claim 5, in addition to the effects of the invention of claim 3 or 4, it is possible to guide the recording medium in a more stable posture as compared to the case where the present configuration is not provided. it can.

  According to the sixth aspect of the present invention, in addition to the effect of the third aspect of the present invention, the recording medium is sufficiently curved toward the transfer member as compared with the case without the present configuration. Can be large.

  According to the present invention of claim 7, in addition to the effects of the invention of any of claims 3 to 6, the recording medium is guided in a more stable posture as compared to the case where the present configuration is not provided. be able to.

  According to the eighth aspect of the present invention, in addition to the effect of the third aspect, the recording medium can be guided to the intermediate transfer member in a stable posture.

1 is a cross-sectional view illustrating an image forming apparatus to which an embodiment of the present invention is applied. It is the schematic of the guide part to which one Embodiment of this invention is applied, and its periphery structure. It is the schematic of the guide part to which one Embodiment of this invention is applied, and its periphery structure. It is explanatory drawing explaining the structure of the guide part to which one Embodiment of this invention is applied. It is explanatory drawing explaining an effect | action of the guide part with which one Embodiment of this invention is applied.

Embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of an image forming apparatus 10 as an embodiment of the present invention.

The image forming apparatus 10 includes a housing 12. The upper surface of the housing 12 is used as a discharge unit 14 from which a recording medium on which an image is formed is discharged.
An image forming unit 20 that forms an image to be transferred to a recording medium and a recording medium supply device 22 that supplies the recording medium to the image forming unit 20 are disposed in the housing 12.

The image forming unit 20 includes, for example, image forming apparatuses 30Y, 30M, 30C, and 30K corresponding to four colors of yellow (Y), magenta (M), cyan (C), and black (K), and an optical writing device 32. And the transfer device 34.
The image forming apparatuses 30Y, 30M, 30C, and 30K and these components are configured similarly except for the color of the image to be formed. Hereinafter, configurations corresponding to the respective colors may be collectively described as “image forming apparatus 30” or the like by omitting Y, M, C, and K.

  The image forming apparatuses 30 are arranged in the order of the image forming apparatuses 30Y, 30M, 30C, and 30K from the rear side (left side in FIG. 1) of the housing 12.

The image forming apparatus 30 is, for example, an electrophotographic system that forms a color image.
Each of the image forming apparatuses 30 includes a drum-shaped photoreceptor 42 as an image carrier that carries a developer image, and a charging device 44 as a charging unit that includes a charging roll that uniformly charges the photoreceptor 42. A developing unit 46 that develops the latent image written on the photoconductor 42 with a developer (toner), and a cleaning device 48 that scrapes and cleans the waste developer remaining on the photoconductor 42, for example.

  The developing device 46 develops the latent images formed on the corresponding photoreceptors 42Y, 42M, 42C, and 42K using Y, M, C, and K developers stored therein.

  The optical writing device 32 is used as a latent image forming device, and irradiates light to each of the photoconductors 42 to form a latent image on the surface of each of the photoconductors 42.

  The transfer device 34 includes an intermediate transfer member 52 used as a transfer member, primary transfer rolls 54Y, 54M, 54C, and 54K used as primary transfer devices, a secondary transfer roll 56 used as a secondary transfer device, and a cleaning device. 58.

  The intermediate transfer body 52 has, for example, an endless belt shape, and is supported by five support rolls 60a, 60b, 60c, 60d, and 60e so that the intermediate transfer body 52 can rotate in the direction indicated by the arrow in FIG. At least one of the support rolls 60a, 60b, 60c, 60d, and 60e is connected to a motor (not shown), and the intermediate transfer member 52 is driven to rotate by rotating by receiving drive transmission from the motor. .

The support roll 60 a is disposed so as to face the secondary transfer roll 56, and functions as a secondary transfer backup roll by the secondary transfer roll 56. The portion (nip portion) sandwiched between the secondary transfer roll 56 and the support roll 60a is the secondary transfer position A.
By the support roll 60a and the support roll 60b, the intermediate transfer body 52 forms a surface (hereinafter sometimes referred to as an intermediate transfer surface B) arranged along a main conveyance path 82 described later.
The support roll 60b is provided so as to overlap the second guide member 104 in the height direction, and is disposed compactly in the height direction while ensuring a sufficient intermediate transfer surface B.

  The primary transfer rolls 54 transfer the developer images formed on the surface of the photoreceptor 42 by the corresponding developing devices 46 to the intermediate transfer body 52.

  The secondary transfer roll 56 transfers the Y, M, C, and K developer images transferred to the intermediate transfer member 52 to the recording medium.

  The cleaning device 58 has a scraping member 62 that scrapes off the developer of each color remaining on the surface of the intermediate transfer body 52 after the developer image of each color is transferred onto the recording medium by the secondary transfer roll 56. The developer scraped off by the scraping member 62 is collected in the main body of the cleaning device 58.

  The recording medium supply device 22 extracts a recording medium storage container 72 that stores recording media in a stacked state, and the uppermost recording medium stored in the recording medium storage container 72, and uses the extracted recording medium as an image forming unit. 20 and a retard roll 76 that prevents the recording medium from being conveyed in a state where a plurality of recording media are overlapped with each other.

In the housing 12, a conveyance path 80 that conveys the recording medium supplied from the recording medium supply device 22 to the discharge unit 14 is provided. The conveyance path 80 includes a main conveyance path 82 and a reverse conveyance path 84.
The main conveyance path 82 conveys the recording medium supplied from the recording medium supply device 22 to the image forming unit 20 and discharges the recording medium on which the image is formed to the discharge unit 14. A transport roll 74, a retard roll 76, a registration roll 86, a transfer device 34, a fixing device 88, and a discharge roll 90 are arranged in this order from the upstream side in the recording medium transport direction along the main transport path 82. Yes.

The registration roll 86 temporarily stops the leading end portion of the recording medium conveyed from the recording medium supply device 22 side, and sends the recording medium toward the transfer device 34 so as to coincide with the image formation timing.
A portion (nip portion) sandwiched between the roll pairs of the resist roll 86 is a resist roll nip position C.
The resist roll 86 is set so as to rotate at a linear velocity higher than that of the intermediate transfer member 52.

In this embodiment, the recording medium conveyed from the recording medium supply device 22 (conveying roll 74 and retard roll 76) is directly conveyed to the resist roll 86 without passing through other rolls. Therefore, a line segment connecting the rotation center of the roll pair of the resist roll 86 and the intermediate transfer surface so that the leading edge of the recording medium fed out by the transport roll 74 is smoothly carried into the resist roll nip position C of the resist roll 86. The angle formed by B is made larger than the configuration in which an intermediate conveyance roll is provided between the registration roll 86 and the conveyance roll 74.
Accordingly, the leading edge of the recording medium is less likely to face the intermediate transfer surface B than the configuration in which the intermediate conveyance roll is provided between the registration roll 86 and the conveyance roll 74.

The fixing device 88 has a heating roll 88a and a pressure roll 88b, and heats and pressurizes the recording medium passing between the heating roll 88a and the pressure roll 88b, thereby fixing the developer image on the recording medium. To do.
The discharge roll 90 discharges the recording medium on which the developer is fixed by the fixing device 88 to the discharge unit 14.

  Between the registration roll 86 and the secondary transfer roll 56 in the main conveyance path 82, a guide portion 92 that guides the recording medium to the secondary transfer position A along the intermediate transfer surface B is disposed.

The reverse conveyance path 84 is a conveyance path that is supplied again to the image forming unit 20 while inverting the recording medium on which the developer image is formed on one surface. For example, two reverse conveyance rolls 98a and 98b are arranged along the reverse conveyance path 84.
The recording medium is conveyed from the main conveyance path 82 to the discharge roll 90, and the discharge roll 90 rotates reversely in a state where the rear end portion of the recording medium is sandwiched between the discharge rolls 90, so that the recording medium is reversed and conveyed. Supplied to the channel 84. The recording medium supplied to the reverse conveyance path 84 is conveyed to a position upstream of the registration roll 86 by the reverse conveyance rolls 98a and 98b.

Next, details of the peripheral structure around the secondary transfer position A will be described.
2 and 3 are schematic views showing the guide portion 92 and its peripheral structure. FIG. 4 is an explanatory diagram illustrating the configuration of the guide unit 92.

The guide part 92 includes a first guide member 102 and a second guide member 104.
The first guide member 102 includes a first guide surface 102a that controls the direction in which the recording medium conveyed from the registration roll 86 enters the intermediate transfer body 52 (intermediate transfer surface B), and the first guide surface 102a. A second guide surface 102b for regulating the posture of the recording medium on the downstream side, and a third guide surface 102c for regulating the posture of the recording medium on the downstream side of the second guide surface 102b. The
The second guide member 104 faces the first guide member 102 and regulates the posture of the recording medium from the intermediate transfer surface B side. The second guide member 104 has a fourth guide surface 104a, and contacts the recording medium through the fourth guide surface 104a.

A connection portion between the first guide surface 102a and the second guide surface 102b of the first guide member 102 is defined as a position P. A connection portion between the second guide surface 102b and the third guide surface 102c is defined as a position Q.
The end of the second guide member 104 on the side farther from the registration roll 86 (upper side in FIG. 2) is defined as a position R.

The first guide surface 102 a is disposed at a position that intersects the tangent L 6 at the registration roll nip position C of the registration roll 86. Therefore, the first guide surface 102a comes into contact with the recording medium conveyed from the registration roll 86 and guides the recording medium in the direction of the intermediate transfer surface B. The first guide surface 102 a constitutes a contact surface on which the leading end of the recording medium conveyed from the registration roll 86 hits.
Further, the first guide surface 102a controls the angle at which the recording medium enters the intermediate transfer surface B until the recording medium comes into contact with the fourth guide surface 104a.

Assuming that the transport distance between the registration roll nip position C and the secondary transfer position A (transport area R1) is a distance M1, the first guide surface 102a has a transport distance of 3 from the registration roll nip position C. It arrange | positions so that it may become the distance M2 below 1 /. Here, the conveyance distance indicates the length of the path through which the leading edge of the recording medium passes.
That is, the recording medium conveyed from the registration roll 86 comes into contact with the first guide surface 102a in a range where the conveyance distance from the registration roll 86 is one third or less of the distance M1 (the entry angle control region R2). It is like that.
The distance M1 is set to be about 50 mm, for example.

  As shown in FIG. 4A, when the entry angle control region R2 is equal to or less than one third of the distance M1, the recording medium conveyed from the registration roll 86 is tangent L6 when guided by the guide unit 92. On the other hand, the sheet is conveyed without curving to the opposite side of the intermediate transfer body 52 (right side in FIG. 4A) (without being curved in an S shape).

On the other hand, as shown in FIG. 4B, when the entry angle control region R2 is larger than one third of the distance M1 (the first guide surface 102a becomes the distance M2 from the registration roll nip position C). When the recording medium conveyed from the registration roll 86 is guided by the guide unit 92, the recording medium conveyed from the registration roll 86 is opposite to the intermediate transfer member 52 with respect to the tangent L6 (right side in FIG. 4A). May be conveyed (curved into an S shape). In this case, since the registration roll 86 rotates at a linear velocity faster than that of the intermediate transfer member 52, the recording medium becomes intermediate as the recording medium is conveyed after the leading end reaches the secondary transfer position A. The curve toward the opposite side (right side in FIG. 4A) of the transfer body 52 gradually increases.
For example, when a thin paper having a paper basis weight of 50 g / m ³ or less is conveyed in an environment of high temperature and high humidity (28 ° C. and 85% Rh), the recording medium is opposite to the intermediate transfer member 52 (right side in FIG. 4A). Is curved and conveyed, and is pressed against the second guide surface 102b by increasing the curvature. For this reason, a conveyance load occurs due to friction with the second guide surface 102b, which may cause a vertical magnification defect or the like.

  In the first guide surface 102a, an extension line L1 extending in the direction of the intermediate transfer surface B along the first guide surface 102a intersects the intermediate transfer surface B, and the extension line L1 and the intermediate transfer surface B have an angle D1. Are arranged to form. The angle D1 is in the range of 40 to 60 degrees, for example.

  In the second guide surface 102b, an extension line L2 extending in the direction of the intermediate transfer surface B along the second guide surface 102b intersects the intermediate transfer surface B, and the extension line L2 and the intermediate transfer surface B have an angle D2. Are arranged to form. The angle D2 is configured to be less than the angle D1. For this reason, the leading edge of the recording medium enters the intermediate transfer surface B without contacting the second guide surface 102b.

  In the third guide surface 102c, an extension line L3 extending in the direction of the intermediate transfer surface B along the third guide surface 102c intersects the intermediate transfer surface B, and the extension line L3 and the intermediate transfer surface B have an angle D3. Are arranged to form. The angle D3 is configured to be less than the angle D2.

  In the fourth guide surface 104a, an extension line L4 extending in the direction of the intermediate transfer surface B along the fourth guide surface 104a intersects the intermediate transfer surface B, and the extension line L4 and the intermediate transfer surface B have an angle D4. Are arranged to form. The angle D4 is configured to be equal to or greater than the angle D5 formed by the straight line L5 connecting the position R and the secondary transfer position A and the intermediate transfer surface B.

  The registration roll 86 is arranged such that the tangent line L6 intersects the intermediate transfer surface B, and the tangent line L6 and the intermediate transfer surface B form an angle D6. The angle D6 is configured to be equal to or smaller than the angle D2, and is, for example, in the range of 20 to 30 degrees.

In the present embodiment, the resist roll 86 is disposed so that the distance M1 is within three times the distance M3. Here, the distance M3 is affected by the electric field from the secondary transfer roll 56 when the recording medium enters the secondary transfer position A without being along the intermediate transfer body 52, and the developer is applied to the recording medium. The distance from the intermediate transfer position A to the range (developer scattering region R3) of the intermediate transfer body 52 that scatters the toner. The distance M3 is about 20 mm, for example.
Thus, when the distance M1 is three times or less of the distance M3, the distance between the secondary transfer roll 56 and the resist roll 86 is shortened compared to the case where the distance M1 is larger than three times the distance M3.

  From the relationship between the distances M1 to M3, the distance M4 that is the transport distance between the rush angle control region R2 and the developer scattering region R3 (curved shape forming region R4) is equal to or greater than the distance M2.

That is, the distance M1 to the distance M4 have the following relationship.
(M1) ≦ (M3) × 3
(M2) ≦ (M1) × (1/3)
(M2) ≦ (M4)

  The angles D1 to D6 can be appropriately changed according to the arrangement of the intermediate transfer member 52, the resist roll 86, and the like. Further, the extension lines L1 to L4, the straight line L5, and the tangent line L6 may intersect with the extension line along the intermediate transfer surface B instead of intersecting with the intermediate transfer surface B.

Next, the conveyance operation of the guide unit 92 with respect to the recording medium will be described.
FIG. 5 is an explanatory diagram for explaining the operation of the guide unit 92 with respect to the recording medium conveyed to the secondary transfer position A. FIG.

  As shown in FIG. 5A, the recording medium conveyed from the registration roll 86 contacts the first guide surface 102 a of the guide unit 92. The recording medium continues to contact the first guide surface 102a (or the second guide surface 102b) until the trailing edge passes the registration roll nip position C.

  As shown in FIG. 5B, the recording medium is guided in the intermediate transfer surface B direction by contacting the first guide surface 102a. The first guide surface 102a guides the recording medium so as to contact the intermediate transfer member 52 on the side farther from the secondary transfer position A (lower side) than the range of the developer scattering distance M3.

  As shown in FIG. 5C, the recording medium guided by the first guide surface 102a is located on the intermediate transfer surface of the intermediate transfer member 52 at a position farther from the secondary transfer position A than the range of the developer scattering distance M3. Contact B.

As shown in FIG. 5D, the recording medium in contact with the intermediate transfer surface B is conveyed in the direction of the secondary transfer position A along the intermediate transfer surface B from the leading end side. At this time, the leading end of the recording medium comes into contact with the intermediate transfer surface B, and the intermediate portion thereof comes into contact with the first guide surface 102a, so that the recording medium starts to bend (loop) toward the intermediate transfer surface B.
The recording medium is restricted by the position Q so as to enter the secondary transfer position A from the intermediate transfer surface B side. That is, the position Q regulates the posture of the recording medium so that the recording medium enters the secondary transfer position A while contacting the intermediate transfer surface B with a predetermined range (length) or more, for example.

As shown in FIG. 5E, the registration roll 86 rotates at a linear velocity faster than that of the intermediate transfer member 52. Therefore, after the leading end of the recording medium reaches the secondary transfer position A, this recording roll is recorded. As the medium is transported, the curve toward the intermediate transfer surface B gradually increases.
The recording medium does not come into contact with the second guide member 104 until the leading end reaches the secondary transfer position A. In other words, the second guide member 104 has a fourth function when the leading edge of the recording medium reaches the secondary transfer position A, and then the curvature of the recording medium toward the intermediate transfer surface B increases to a predetermined range. The guide surface 104a is in contact with the recording medium.

As shown in FIG. 5F, when the curvature of the recording medium toward the intermediate transfer surface B increases to a predetermined range, the recording medium comes into contact with the position R of the second guide member 104. As described above, the recording medium is regulated by the second guide member 104 so that the curvature toward the intermediate transfer surface B side does not increase beyond a predetermined range.
After the trailing edge of the recording medium has passed the registration roll nip position C, the recording medium is separated from the first guide surface 102a and guided to the intermediate transfer surface B along the fourth guide surface 104a, and the secondary transfer position. Enter A.
As described above, after the recording medium comes into contact with the second guide member 104, the angle at which the recording medium enters the intermediate transfer surface B is controlled by the second guide member 104.

  When the recording medium is guided by the guide unit 92, the recording medium is conveyed without curving to the opposite side (right side in FIG. 5) of the intermediate transfer body 52 with respect to the tangent L6. That is, the guide portion 92 is configured to curve the recording medium only to the intermediate transfer member 52 side.

DESCRIPTION OF SYMBOLS 10 Image forming apparatus 12 Housing 20 Image forming part 22 Recording medium supply apparatus 30 Image forming apparatus 34 Transfer apparatus 42 Photoconductor 44 Charging apparatus 46 Developer 48 Cleaning apparatus 52 Intermediate transfer body 54 Primary transfer roll 56 Secondary transfer roll 58 Cleaning apparatus 60a support roll 60b support roll 80 conveyance path 86 resist roll 88 fixing device 90 discharge roll 92 guide part 102 first guide member 102a first guide surface 102b second guide surface 102c third guide surface 104 second guide Member 104a Fourth guide surface

Claims (8)

A first guide member;
A second guide member provided so as to face the first guide member and pass a recording medium between the first guide member;
Have
The first guide member guides one surface of the recording medium, and a contact surface with which the leading end of the conveyed recording medium hits is provided on the upstream side in the recording medium transport direction of the first guide member, and the contact surface is It is set so that the front end of the recording medium crosses the recording medium conveyance direction when hitting the contact surface and faces in the direction of entering the image carrier,
The recording medium guiding apparatus, wherein the second guide member is set so that the other surface of the recording medium hits after the leading end of the recording medium enters the image holding member.   The recording medium guiding apparatus according to claim 1, wherein the second guide member is set so that the other surface of the recording medium hits a leading end portion of the second guide member in the recording medium conveyance direction. An image carrier that moves while holding the developer;
Transfer means for transferring the developer held on the image carrier to a recording medium;
Conveying means for conveying the recording medium at a predetermined time;
A recording medium guiding device for guiding the recording medium conveyed from the conveying means toward the image carrier;
Have
The recording medium guide device includes:
A first guide member;
A second guide member provided so as to face the first guide member and pass a recording medium between the first guide member;
Have
The first guide member guides one surface of the recording medium, and a contact surface with which the leading end of the conveyed recording medium hits is provided on the upstream side in the recording medium transport direction of the first guide member, and the contact surface is It is set so that the front end of the recording medium crosses the recording medium conveyance direction when hitting the contact surface and faces in the direction of entering the image carrier,
The image forming apparatus, wherein the second guide member is set so that the other surface of the recording medium hits after the leading end of the recording medium enters the image carrier. The image forming apparatus according to claim 3, wherein a speed at which the transport unit transports the recording medium is faster than a speed at which the image carrier moves. The transfer means is configured to face each other so that the transfer member and the backing member sandwich the image holding member,
The conveying means is configured such that two rotating members face each other,
The leading edge of the contact surface of the first guide member in the recording medium conveyance direction is 3 minutes upstream in the recording medium conveyance direction of the recording medium conveyance distance between the opposite position center of the transfer means and the opposite position center of the conveyance means. 5. The image forming apparatus according to claim 3, wherein the image forming apparatus is located closer to the conveying unit than 1. 6. The image forming apparatus according to claim 3, wherein the second guide member is set so as to come into contact with the recording medium after at least the front end of the recording medium reaches the center of the opposing position of the transfer unit. . The image forming apparatus according to claim 3, wherein the first guide member is set so as not to come into contact with the recording medium after a rear end of the recording medium passes through a center of the opposite position of the conveying unit. apparatus. The image forming apparatus according to claim 3, wherein the image carrier is an intermediate transfer member.

Images