JP2005162354A - Sheet carrying device and image forming device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To decrease impulsive sound generated when a sheet passes a stepped portion formed on an outside guide of a bent sheet guiding passage. <P>SOLUTION: The sheet carrying device 81 comprises a carrying passage 27 having the arc-shaped outside guide 16 and an inside guide for guiding a carried sheet; the stepped portion 30 formed on the outside guide 16 and wherein a downstream side is lower than an upstream side; and an elastic member 32 provided on the outside guide 16 upstream to the stepped portion 30 at one end, extending to the downstream side, and having a second bending portion 32b press-contacted on the inside guide 33 and a tip end 32c press-contacted on the outside guide 16. The elastic member 32 presses the carried sheet on the inside guide 33 by a second bending portion 32e. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a sheet conveying apparatus that conveys a sheet, and more particularly to a sheet conveying apparatus that reduces sheet conveying noise and an image forming apparatus that forms an image on a sheet.

  2. Description of the Related Art Conventionally, a color laser printer, which is an example of an image forming apparatus provided with a sheet conveying device, is a material for reducing noise (such as a sound insulating material and a sound absorbing material) as a countermeasure against noise such as gear driving and sheet rubbing noise. Often, parts using materials, damping materials, etc. are attached inside the exterior or near the vibration source.

  In particular, if there is a step or a gap in the sheet conveying path of the sheet conveying apparatus, the trailing edge of the sheet may be flipped when the sheet passes through that portion, and noise is likely to occur. For this reason, the flexible board member which fills a level | step difference and a clearance gap is attached to a part with a level | step difference or a clearance gap, and the noise produced when a sheet | seat passes a level | step difference or a clearance gap was made low (for example, refer patent document 1). ).

  A laser printer which is an example of a conventional image forming apparatus provided with a conventional sheet conveying apparatus having a step or a gap will be described with reference to FIGS.

  The sheet conveying apparatus conveys the sheet P stacked on the middle plate 141 of the sheet feeding cassette 140 and separated one by one by the sheet feeding roller 142 through a curved conveying path 155 that is a sheet guide path. ing. A step portion (step) 156 and a gap 163 are formed in the outer guide 158 of the transport path 155. The step portion 156 and the gap 163 are covered with an elastic member 157 that is disposed substantially in parallel with the outer guide 158. The sheet P is conveyed through the curved conveyance path 155 to the intermediate conveyance roller pair 143 that is a pair of rotating bodies while being guided by the elastic member 157, and is sent to the registration roller pair 144 and then conveyed to the secondary transfer unit T <b> 2. Is done.

  On the other hand, in a color image forming system, a latent image is formed on an image carrier (145Y, 145M, 145C, 145K) corresponding to a plurality of color components by laser exposure. This latent image is developed with toner into each color by a toner as a developer by a developing roller. A toner image corresponding to a plurality of color component images formed on the image carrier 145 of each color is a primary transfer portion sandwiched between the image carrier 145 and primary transfer counter rollers (148Y, 146M, 146C, 146K). At T1, the images are sequentially superimposed and transferred onto the intermediate transfer belt 147. As a result, a target full-color toner image is formed on the intermediate transfer belt 147. The full-color toner image on the intermediate transfer belt 147 is collectively transferred in an unfixed state to a sheet P as a recording material by a secondary transfer portion T2 configured by a secondary transfer roller 148 and a secondary transfer counter roller 149. .

  The sheet on which the full-color toner image is not fixed is introduced into the fixing device 150 and is heated and pressed to fix the full-color toner image. Thereafter, the sheet P is conveyed to a plurality of discharge roller pairs 151, 152, and 153 and discharged to a discharge tray 154.

JP-A-2002-94721 (P2002-94721A) (refer to claim 18)

  However, in the conventional sheet conveying apparatus, the nip 162 of the intermediate conveying roller pair 143 is located in the conveying path 155 constituted by the curved outer guide 158 and the inner guide 161, and the step formed in the outer guide 158. The elastic member 157 having flexibility is attached to the portion having the portion 156 and the gap 163 so as to cover the step portion 156 and the gap 163 almost in parallel with the conveyance direction. When the rear end becomes free, starting from the surface where the sheet is in contact with the inner guide 161, the rear end of the sheet jumps according to the strength of the waist of the sheet and hits the outer guide 153 to generate an impact sound. was there.

  FIG. 11 is a graph showing a result of measuring the magnitude of the impact sound generated with the passage of time when the sheet passes through the conveyance path 155.

  As shown in FIG. 11, the impact sound is generated at the step 159 between the intermediate conveyance roller pair 143 and the elastic member 157 and at the step 160 between the tip 167 a of the elastic member 157 and the outer guide 158, and is generated from the paper feed cassette 140. It can be seen that it occurs irregularly each time the sheet P is conveyed. As described above, the conventional sheet conveying apparatus has a problem that the sound pressure level at the time of occurrence is about 55 dB or more, or about 65 dB or more, and the noise level is deteriorated and the variation in measurement is increased.

  Further, when the conveyance path 155 is reversely fed in order to remove the jammed sheet, the reverse feeding tip of the jam sheet enters between the tip 157a of the elastic member 157 and the outer guide 158, and the jam sheet is easily There was also a problem that could not be removed.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet conveying apparatus in which an impact sound generated when a sheet passes through a step formed on an outer guide of a curved sheet guide path is reduced.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet conveying apparatus in which an impact sound generated when a sheet passes through a nip of a rotating body pair positioned on a curved sheet guide path is reduced.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an image forming apparatus that includes a sheet conveying device that reduces an impact sound generated when a sheet passes through a sheet guide path and that has a low operating sound.

  In order to achieve the above object, a sheet conveying apparatus according to the present invention has a sheet guide path having an arcuate outer guide and an inner guide for guiding a conveyed sheet, and a downstream side lower than an upstream side formed in the outer guide. One end of the stepped portion and the outer guide on the upstream side of the stepped portion is extended to the downstream side, the downstream intermediate portion is pressed against the inner guide, and the other end is pressed against the outer guide. The elastic member presses the conveyed sheet against the inner guide at the intermediate portion.

  In order to achieve the above object, a sheet conveying apparatus according to the present invention includes a pair of rotating bodies that nipped and rotated a sheet at a nip, an arc-shaped outer guide that guides the sheet conveyed by the rotating body pair, and an inner side. One end of the sheet guide path having a guide and the outer guide on the upstream side of the nip is extended to the downstream side, the downstream intermediate portion is pressed against the inner guide, and the other end is pressed against the outer guide. And the elastic member is configured to press the conveyed sheet against the inner guide at the intermediate portion.

  In the sheet conveying apparatus of the present invention, the outer guide includes an upstream guide member and a downstream guide member, and the step portion is formed at a boundary between the upstream guide member and the downstream guide member.

  In the sheet conveying apparatus of the present invention, the one end of the elastic member is bent so that the intermediate portion is pressed against the inner guide.

  In the sheet conveying apparatus of the present invention, the intermediate portion of the elastic member is bent so that the other end is pressed against the outer guide.

  In the sheet conveying measure of the present invention, the downstream portion of the elastic member from the intermediate portion is a sheet rear end guide portion that guides the rear end of the sheet that has passed through the intermediate portion from the inner guide to the outer guide.

  In order to achieve the above object, an image forming apparatus according to the present invention includes an image forming unit that forms an image on a sheet, and the sheet conveying apparatus according to any one of the above that guides the sheet.

  The sheet conveying apparatus according to the present invention has an elastic structure in which one end is provided on the outer guide upstream from the stepped portion and extends downstream, the downstream intermediate portion is pressed against the inner guide, and the other end is pressed against the outer guide. Since the member presses the conveyed sheet against the inner guide at the intermediate portion, the occurrence of jamming during sheet conveyance is reduced, the impact sound coming into contact with the outer guide, and the outer guide when passing through the sheet, The generation of rubbing noise can be prevented and noise can be reduced.

  The sheet conveying apparatus according to the present invention has an elastic structure in which one end is provided on the outer guide upstream from the stepped portion and extends downstream, the downstream intermediate portion is pressed against the inner guide, and the other end is pressed against the outer guide. When the sheet is jammed, the jammed sheet is guided by the portion between the downstream intermediate portion of the elastic member that is in pressure contact with the inner guide and the other end that is in pressure contact with the outer guide. And the elastic member can be guided, and the jam sheet can be easily removed.

  In the sheet conveying apparatus of the present invention, one end is provided on the outer guide on the upstream side of the nip of the rotating body pair and extends downstream, the downstream intermediate portion is pressed against the inner guide, and the other end is pressed against the outer guide. The elastic member that presses the conveyed sheet against the inner guide at the intermediate portion reduces the occurrence of jamming during sheet conveyance, the impact sound that contacts the outer guide, and the outer side when the sheet passes Generation of rubbing noise with the guide can be prevented and noise can be reduced.

  In the sheet conveying apparatus of the present invention, one end is provided on the outer guide on the upstream side of the nip of the rotating body pair and extends downstream, the downstream intermediate portion is pressed against the inner guide, and the other end is pressed against the outer guide. When a jam occurs in the sheet, the jam sheet is formed by a portion between the downstream intermediate portion of the elastic member that is in pressure contact with the inner guide and the other end that is in pressure contact with the outer guide. Can be guided between the inner guide and the elastic member, and the jam sheet can be easily removed.

  Hereinafter, a sheet conveying apparatus according to an embodiment of the present invention and a color laser printer which is an example of an image forming apparatus including the sheet conveying apparatus in an apparatus main body will be described. In addition to the color laser printer, the image forming apparatus includes a monochrome laser printer, a copying machine, a facsimile, and a complex machine of these, and is not limited to a color laser printer. Further, the sheet conveying device is not provided only in the color laser printer.

(Color laser printer)
FIG. 1 is a schematic configuration diagram of a color laser printer 91 according to an embodiment of the present invention. The color laser printer 91 includes a sheet conveying device 81 according to a first embodiment described later.

  The color laser printer 91 is configured to form a color image on a sheet with each color of yellow (Y), magenta (M), cyan (C), and black (K).

  The color laser printer 91 includes a photosensitive drum (1Y, 1M, 1C, 1K) that is an image carrier, a charging roller (2Y, 2M, 2C, 2K) that is a charging unit, and a development that visualizes an electrostatic latent image. Roller (3Y, 3M, 3C, 3K), cleaning means (4Y, 4M, 4C, 4K) for removing residual toner on the photosensitive drum, and the like are collected in one container for each color, so-called all-in-one cartridge (18Y, 18M, 18C, 18K).

  The color laser printer 91 includes a yellow cartridge 18Y filled with yellow toner in a developing device, a magenta cartridge 18M filled with magenta toner in the developing device, a cyan cartridge 18C filled with cyan toner in the developing device, and a black toner filled in the developing device. The four black cartridges 18K are provided.

  A color laser printer 91 irradiates a photosensitive drum (1Y, 1M, 1C, 1K) with laser light, which is an operation light and exposure, to form an electrostatic latent image on the photosensitive drum (5Y, 5M, 5C, 5K) are provided corresponding to the four color toner cartridges. A laser scanning exposure optical system is used as the optical system.

  Scanning light based on image data is irradiated from the optical system (5Y, 5M, 5C, 5K) to the photosensitive drum (1Y, 1M, 1C, 1K). The photosensitive drums (1Y, 1M, 1C, 1K) are uniformly charged in advance by charging means (2Y, 2M, 2C, 2K). Therefore, an electrostatic latent image corresponding to the image is formed on the surface of the photosensitive drum (1Y, 1M, 1C, 1K) by the scanning light.

  By setting the developing bias applied to the developing rollers (3Y, 3M, 3C, 3K) by a bias power source (not shown) to an appropriate value between the charged potential and the latent image (exposed rear) potential, the negative polarity The toner charged on the photosensitive drum selectively adheres to the electrostatic latent image on the photosensitive drum (1Y, 1M, 1C, 1K), and the photosensitive drum is developed with toner. That is, a color toner image is formed on the photosensitive drum.

  The single color toner image developed on each photosensitive drum (1Y, 1M, 1C, 1K) is an intermediate transfer member that circulates at substantially constant speed in synchronization with the photosensitive drum (1Y, 1M, 1C, 1K). Is transferred to the intermediate transfer belt 5. In this embodiment, an endless intermediate transfer belt 6 is used as an intermediate transfer member. The intermediate transfer belt 6 is driven by a driving roller 7 and is stretched by a tension roller 8. The color laser printer 91 according to the present embodiment has primary transfer rollers (9Y, 9C, 9M) as primary transfer means for transferring the color toner images on the photosensitive drums (1Y, 1M, 1C, 1K) to the intermediate transfer belt 6. 9K). A toner image is primarily transferred to the intermediate transfer belt 6 by applying a primary transfer bias having a polarity opposite to that of the toner to a primary transfer roller (9Y, 9C, 9M, 9K) by a bias power source (not shown).

  After the primary transfer, residual toner remaining on the photosensitive drum (1Y, 1M, 1C, 1K) is removed by the cleaning means (4Y, 4M, 4C, 4K). A urethane blade is used as the cleaning means. By performing the above process for each color of yellow, magenta, cyan, and black in synchronization with the circulation of the intermediate transfer belt 6, the primary transfer toner images of the respective colors are sequentially superimposed on the intermediate transfer belt 6. Is done. Note that when forming an image of only a single color (single color mode), only the target color is performed.

  On the other hand, the sheet P set in the sheet cassette 10 serving as a sheet supply unit is fed by the feeding roller 11, passes through the curved sheet conveyance path 27, and is registered by the registration roller pair 12 at a predetermined timing. It is sent to the secondary transfer portion T2. That is, the sheet P is conveyed to the nip portion between the intermediate transfer belt 6 and the secondary transfer roller 13.

  The primary transfer color toner image formed on the intermediate transfer belt 6 is transferred onto the sheet P by a bias having a polarity opposite to that of the toner applied to the secondary transfer roller 13 as a secondary transfer unit by a bias applying unit (not shown). Are collectively transferred. The inner side of the intermediate transfer belt 6 is received by the secondary transfer roller facing roller 14.

  The secondary transfer residual toner remaining on the intermediate transfer belt 6 after the secondary transfer is removed by the intermediate transfer belt cleaning unit 15. As the intermediate transfer belt cleaning unit 15, for example, a urethane blade is used in the same manner as the photosensitive drum cleaning unit.

  The color toner image secondarily transferred onto the sheet P passes through a fixing device 50 serving as a fixing unit, and is heated and pressurized and fixed onto the sheet P. The sheet P on which the color toner image is fixed is conveyed to the paper discharge rollers 22, 23, 24, and is discharged to the paper discharge tray 25 and stacked. Photosensitive drum (1Y, 1M, 1C, 1K), charging roller (2Y, 2M, 2C, 2k), developing roller (3Y, 3M, 3C, 3k), intermediate transfer belt 6, primary transfer roller (9Y, 9M) , 9C, 9K), the secondary transfer roller 13 and the like constitute image forming means.

(Sheet Conveying Device of First Embodiment)
2 and 3 are detailed views of the sheet conveying apparatus 81 according to the first embodiment. The conveyance path 27 which is a sheet guide path guides the sheet conveyed by the feeding roller 11 and is formed by an outer guide 16 and an inner guide 33 which are curved substantially parallel to each other.

  The outer guide 16 is formed by an upstream outer guide 28 and a downstream outer guide 29. A gap 17 is formed between the upstream outer guide 28 and the downstream outer guide 29. Further, the downstream outer guide 29 is lower than the upstream outer guide 28, and a step (step) 30 is formed between the guides 28 and 29. The curved conveyance path 27 has a substantially straight linear conveyance path 31 directed toward the secondary transfer portion T2 on the downstream side.

  The elastic member 32 has elasticity and is provided in the transport path 27 in a state where one end is fixed to the upstream outer guide 28 on the upstream side of the stepped portion 30 and is extended to the downstream side. The elastic member 32 is in contact with the first bent portion 32 a bent at the upstream side of the step portion 30 and the gap 17 and the inner guide 33 at the downstream side of the step portion 30 and the gap 17. The tip part (the other end, the downstream end part) 32 c is in pressure contact with the downstream outer guide 29, and is bent by the second refracting part 32 b that is an intermediate part.

  Immediately before passing through the stepped portion 30 and the gap 17, the sheet P moving through the curved portion in the conveyance path 27 is urged to the inner guide 33 by the guide portion 32 d extending from the first refracting portion 32 a to the downstream side. In this state, the transport path 27 is moved. The sheet P has a repulsive force that becomes linear in the curved conveyance path 27 by the restoring force (strength of stiffness) of the sheet itself. However, since the elastic member 32 cancels the repulsive force by the elastic force urging the inner guide 33, the rear end of the sheet P always abuts against the elastic member 32 and does not go out of control. That is, since the rear end (upstream end portion) of the sheet is conveyed by being pressed against the inner guide 33 by the second bent portion 32b, the impact sound is reduced without jumping by the step portion 30 or the gap 17. It is transported along the transport path 27.

  Further, the rear end of the sheet P when passing through the curved conveyance path 27 is the rear end of the sheet from the second refracting portion 32b toward the front end portion 32c as shown by a broken line in FIG. While being always in contact with the end guide portion 32e, the sheet is smoothly delivered along the downstream outer guide 29.

  Therefore, as shown in FIG. 4, the elastic member 32 has an impact sound generated when the rear end of the sheet P hits the downstream outer guide 29 and a sliding generated by rubbing against the downstream outer guide 29 when the sheet P passes. Generation of frictional noise can be prevented and noise can be reduced.

  Further, even if the conveying path 27 is reversely fed in order to remove the jammed sheet, the backward feeding leading edge of the jammed sheet is guided between the inner guide 33 and the elastic member 32 by the sheet rear end guiding portion 32e. Unlike the prior art, the jam sheet can be easily removed without guiding the jam sheet between the outer guide 16 and the elastic member 32 and making it difficult to remove the jam sheet. It becomes like this.

(Sheet Conveying Device of Second Embodiment)
FIG. 5 is a schematic configuration diagram of a color laser printer 92 which is an example of an image forming apparatus including the sheet conveying device 82 according to the second embodiment. 6 and 7 are detailed views of the sheet conveying device 82 according to the second embodiment. The color laser printer 92 shown in FIG. 5 differs from the color laser printer 91 shown in FIG. 1 only in the portion of the sheet conveying apparatus. Therefore, the same parts as those in FIG. A description of the operation is omitted. Therefore, only the sheet conveying device 82 of the second embodiment will be described.

  A conveyance path 34 that is a sheet guide path guides a sheet conveyed by the feeding roller 11 and a conveyance roller pair 42 that is a pair of rotating bodies, and an outer guide 41 that is curved substantially parallel to each other. The inner guide 40 is formed. The conveyance roller pair 42 is disposed so that the nip 26 is positioned within the width of the conveyance path 34.

  The outer guide 41 is formed by an upstream outer guide 35 and a downstream outer guide 36. A gap 43 is formed between the upstream outer guide 35 and the downstream outer guide 36. Further, the downstream outer guide 36 is lower than the upstream outer guide 35, and a step portion (step) 37 is formed between the guides 35 and 36. The curved conveyance path 34 has a substantially linear straight conveyance path 38 toward the secondary transfer portion T2 on the downstream side.

  The elastic member 39 has elasticity and is provided in the conveyance path 27 in a state in which one end is fixed to the upstream outer guide 28 on the upstream side of the nip 26 and the stepped portion 30 of the conveyance roller pair 42 and extended to the downstream side. ing. The elastic member 39 includes the first refracting portion 32a bent upstream of the nip 26, the step portion 37, and the gap 43 of the conveyance roller pair 42, the nip 26, the step portion 37, and the conveyance roller pair 42. It is formed in a bent shape by a second refracting portion 39b that is an intermediate portion that is bent and in contact with the inner guide 40 on the downstream side of the gap 43, and a distal end portion (the other end, the downstream end portion) 39c. Is in pressure contact with the downstream outer guide 36.

  The sheet P moving along the curved portion in the conveyance path 34 is conveyed while being urged by the inner guide 40 by the guide portion 39d extending downstream from the first refracting portion 39a immediately before passing through the conveyance roller nip 26. Move along the road 34. The sheet P is nipped and conveyed between the registration roller pair 12 and the nip 26 of the conveyance roller pair 42. The nip 26 of the conveyance roller pair 42 conveys the sheet at a sheet conveyance speed faster than the sheet conveyance speed of the registration roller pair 12. Due to the difference in sheet conveying speed, the sheet P passes through the elastic member 39 while forming a loop between the registration roller pair 12 and the nip 26 of the conveying roller pair 42. Since the formed loop receives an elastic force from the first refracting portion 39a by the elastic member 39 having elasticity, the loop becomes large and is not rubbed against the outer guide 41. The sheet P has a repulsive force that becomes linear in the curved conveyance path 34 by the restoring force (strength of stiffness) of the sheet itself. However, when the trailing end of the sheet P passes through the nip 26 of the conveying roller pair 42 and becomes free, even if a restoring force that is linear on the sheet P is generated, the elastic member 39 does not move to the inner guide. Since the restoring force is canceled out by the elastic force biased to 40, the rear end of the sheet P always abuts against the elastic member 39 and does not run out. That is, since the rear end (upstream end portion) of the sheet is conveyed while being pressed against the inner guide 33 by the second bent portion 32b, when the sheet passes through the nip of the conveying roller pair 42, unlike the conventional case, the sheet jumps. Thus, there is no contact with the elastic member 39, and the impact sound is reduced accordingly.

  Further, the trailing end of the sheet P when passing through the curved conveyance path 34 is guided by the elasticity of the sheet P itself from the second refracting portion 39b toward the leading end portion 39c as indicated by a broken line in FIG. While being always in contact with the portion 39e, it is smoothly delivered along the downstream side outer guide 36.

  Therefore, as shown in FIG. 8, the elastic member 39 has an impact sound generated when the rear end of the sheet P hits the downstream outer guide 36, and a sliding generated by rubbing against the downstream outer guide 36 when the sheet P passes. Generation of frictional noise can be prevented and noise can be reduced.

  Further, even if the conveyance path 34 is reversely fed in order to remove the jammed sheet, the leading edge of the jammed sheet is guided between the inner guide 40 and the elastic member 39 by the sheet rear end guide portion 32e. Unlike the prior art, the jam sheet can be easily removed without guiding the jam sheet between the outer guide 41 and the elastic member 39 to make it difficult to remove the jam sheet. It becomes like this.

1 is a schematic configuration diagram of a color laser printer according to an embodiment of the present invention. FIG. 1 is a detailed view of the periphery of the sheet conveying apparatus according to the first embodiment. FIG. 2 is a detailed view of the vicinity of the conveyance path of the sheet conveyance apparatus in FIG. 1. It is a graph of the impact sound measurement data of the sheet conveyed by the sheet conveying apparatus of the first embodiment. It is a schematic block diagram of the color laser printer in other embodiment of this invention. FIG. 5 is a detailed view of the periphery of the sheet conveying apparatus according to the second embodiment. FIG. 5 is a detailed view of the vicinity of the conveying path of the sheet conveying apparatus in FIG. It is a graph of the impact sound measurement data of the sheet conveyed by the sheet conveying apparatus of the second embodiment. It is a schematic block diagram of the conventional color laser printer. FIG. 10 is a detailed view of the vicinity of the conveyance path of the sheet conveyance apparatus in FIG. 9. 10 is a graph of impact sound measurement data of a sheet conveyed by the conventional sheet conveying apparatus shown in FIG.

Explanation of symbols

P sheet T1 Primary transfer portion T2 Secondary transfer portion 1Y, 1M, 1C, 1k Photosensitive drum (image forming means)
2Y, 2M, 2C, 2k charging roller (image forming means)
3Y, 3M, 3C, 3k developing roller (image forming means)
6 Intermediate transfer belt (image forming means)
9Y, 9M, 9C, 9Bk primary transfer roller (image forming means)
12 registration roller pair 13 secondary transfer roller (image forming means)
14 Secondary transfer roller facing roller 16 Outer guide 17 Gap 26 Conveyance roller nip 27 Conveyance path (sheet guide path)
28 Upstream Outer Guide 29 Downstream Outer Guide 30 Step 32 Elastic Member 32a First Bent 32b Second Bent (Intermediate)
32c Tip (other end)
32d guide section 32e sheet rear end guide section 33 inner guide 34 transport path (transport path)
35 upstream outer guide 36 downstream outer guide 37 step portion 39 elastic member 39a first bent portion 39b second refracting portion (intermediate portion)
39c Tip (other end)
39d guide section 39e sheet rear end guide section 40 inner guide 41 outer guide 42 conveying roller pair (rotating body pair)
43 Gap 81 Sheet conveying device of the first embodiment 82 Sheet conveying device of the second embodiment 91 Color laser printer (image forming apparatus) of the first embodiment
92 Color Laser Printer (Image Forming Apparatus) of Second Embodiment

Claims (7)

A sheet guide path having an arcuate outer guide and an inner guide for guiding a conveyed sheet;
A stepped portion having a lower downstream side than an upstream side formed in the outer guide; and
An elastic member having one end provided on the outer guide on the upstream side of the stepped portion and extending downstream, the downstream intermediate portion being in pressure contact with the inner guide, and the other end being in pressure contact with the outer guide; Prepared,
The elastic member presses the conveyed sheet against the inner guide at the intermediate portion. A pair of rotating bodies that sandwich and rotate the sheet and convey it;
A sheet guide path having an arcuate outer guide and an inner guide for guiding a sheet conveyed by the pair of rotating bodies;
An elastic member having one end provided on the outer guide upstream from the nip and extending downstream, the downstream intermediate portion being in pressure contact with the inner guide, and the other end being in pressure contact with the outer guide. ,
The elastic member presses the conveyed sheet against the inner guide at the intermediate portion.   2. The outer guide includes an upstream guide member and a downstream guide member, and the step is formed at a boundary between the upstream guide member and the downstream guide member. The sheet conveying apparatus according to the description.   4. The sheet conveying device according to claim 1, wherein the one end of the elastic member is bent to press the intermediate portion against the inner guide. 5.   4. The sheet conveying device according to claim 1, wherein the intermediate portion of the elastic member is bent and the other end is pressed against the outer guide. 5.   2. The sheet rear end guide portion that guides the rear end of the sheet that has passed through the intermediate portion from the inner guide to the outer guide, on the downstream portion of the elastic member. The sheet conveying apparatus according to any one of 5. Image forming means for forming an image on a sheet;
The sheet conveying device according to any one of claims 1 to 6, which guides the sheet;
An image forming apparatus comprising:

Images