JP6548421B2 - Sheet conveying apparatus and image forming apparatus - Google Patents

Description

  The present invention relates to a sheet conveying apparatus for conveying a sheet in an image forming apparatus such as a copying machine, a printer, and a facsimile, and an image forming apparatus provided with the sheet conveying apparatus.

  In recent years, when printing is performed by an image forming apparatus such as a printer or a copier, a wide variety of sheets are used according to the purpose. Thick paper is one of them, and the demand for conveying a sheet having higher rigidity (rigidity) is also increasing. On the other hand, in order to miniaturize the apparatus, it is required to make the curvature radius of the curved conveyance path as small as possible. Therefore, an image forming apparatus has been proposed that has a configuration capable of stably conveying a sheet such as thick paper in a curved conveyance path with a small radius of curvature (see Patent Document 1).

  Generally, in the image forming apparatus, if the radius of curvature of the curved conveyance path is reduced in order to feed a high-rigidity sheet such as a thick sheet or a high-rigidity special sheet such as an envelope The conveyance resistance to the inner guide member forming the conveyance path is increased. Therefore, the sheet can not be advanced along the transport path that constitutes the bent portion, and a stable transport operation becomes difficult. In the technique described in Patent Document 1, in order to solve this problem, a part of the first conveyance guide plate inside the curved conveyance path is changed, and the second conveyance guide plate is received by the force received from the thick sheet fed. The movable guide plate is disposed so as to be displaced in the direction in which the opening interval of.

JP 2007-131455 A

  For example, in an image forming apparatus in which a paper deck capable of storing a large volume of sheets is connected to the image forming apparatus main body, the transport path for feeding the sheet from the paper deck to the image forming apparatus main body has a small curvature radius as described above. In the case of the transport path, the following problems occur. When the curved transport paths are arranged to pass the sheet by two transport guide pairs arranged upstream and downstream, the transport guide pairs are configured to intersect at a large angle in order to reduce the radius of curvature. Ru. With this configuration, the leading end of the sheet transported from the upstream transport guide pair abuts on the downstream transport guide pair at a large angle. When this sheet is a thick paper or envelope with high rigidity, when it comes in contact with the guide surface of the conveyance guide, the conveyance resistance increases, and a large sheet conveyance force is required.

  In order to avoid this, it is necessary to increase the size of the transport drive motor to exert a transport force that overcomes the transport resistance at the time of contact, resulting in an increase in the cost of the apparatus.

  The present invention is a sheet conveying apparatus capable of stably conveying a high-rigidity sheet such as a thick paper or an envelope in a configuration having a curved conveyance path arranged to bend and deliver two pairs of conveyance guides. And providing an image forming apparatus.

According to the present invention, in the sheet conveying apparatus, a curved conveyance path is formed by the first conveyance guide pair disposed to face the sheet in a guideable manner and the first conveyance guide pair, and the first conveyance guide pair is guided by the first conveyance guide pair. and a second conveying guide pair disposed with guidable opposite the sheet coming is, the first conveyance guide pair, a first outer guide located outside the curvature of the curved conveying path, wherein A first inner guide positioned opposite to the first outer guide, the first outer guide being opposed to the second outer guide positioned outside the curve of the curved transport path in the second transport guide pair And an elastic guide member disposed in the bending and extending portion and extending downstream in the sheet conveying direction, and the first outer guide , Can be rotated relative to the device body Are supported, said first inner guide has a transport surface in a position facing the conveying surface of the first outer guide from the bending point of the bent extending portion extending toward the upstream of the sheet conveyance direction, The downstream end of the bending extension portion in the sheet conveying direction is a position where the extension portion linearly extending on the downstream side of the sheet conveying direction along the conveying surface of the first inner guide intersects the bending extension portion The elastic guide member is extended to the second outer guide side, and the elastic guide member is elastically deformed when the first outer guide is rotationally moved .

  According to the present invention, in a configuration having a curved conveyance path arranged to bend and deliver two pairs of conveyance guides, a sheet having high rigidity such as a thick paper or an envelope can be stabilized without impairing the downsizing of the apparatus. Can be transported.

FIG. 1 is a cross-sectional view showing a schematic configuration of an image forming apparatus according to an embodiment of the present invention. (A) is a conveyance direction sectional view of the sheet conveying apparatus according to the present embodiment, and (b) is a conveyance direction sectional view of the sheet conveying apparatus showing a state different from (a). (A), (b) is a conveyance direction sectional view of the sheet conveyance device showing a different state. (A), (b) is a detailed view of the curved part vicinity of Fig.2 (a) in this embodiment. (A) is a conveyance direction sectional view of a sheet conveyance device in a comparative example, and (b) is a conveyance direction sectional view of the sheet conveyance device showing a state different from (a). (A) is a conveyance direction sectional view of a sheet conveyance device in a comparative example, and (b) is a conveyance direction sectional view of the sheet conveyance device showing a state different from (a).

  Hereinafter, an image forming apparatus such as a copying machine or a printer will be described as an example with reference to the drawings. However, the dimensions, materials, shapes, relative positions, etc. of components described in the following embodiments should be appropriately changed according to the configuration of the apparatus to which the present invention is applied and various conditions, The scope of the invention is not intended to be limited thereto.

  FIG. 1 is a cross-sectional view showing a schematic configuration of an image forming apparatus 90 according to the present embodiment. In the present embodiment, a color image forming apparatus using an electrophotographic method is used. In this color image forming apparatus, four color image forming units 1 (1Y, 1M, 1C, 1K) are arranged on an intermediate transfer belt in recent years because of their advantages in adaptability to various sheets and excellent print productivity. The arranged intermediate transfer tandem system is the mainstream.

  As shown in FIG. 1, the image forming apparatus 90 is connected to the image forming apparatus main body 100 in order to load the image forming apparatus main body 100 and a large-capacity sheet S and feed the sheet S to the image forming apparatus main body 100. A paper deck 101 is provided. The paper deck 101 constitutes a sheet feeding unit for feeding sheets. A reader unit 21 having a scanning optical system for reading an image is disposed at an upper portion in the image forming apparatus main body 100. Image forming units 1Y, 1M, 1C, and 1K arranged along the rotational direction of the intermediate transfer belt 31 are disposed below the leader unit 21. The image forming units 1Y, 1M, 1C and 1K correspond to yellow (Y), magenta (M), cyan (C) and black (Bk), respectively.

  On the lower side in the image forming apparatus main body 100, the paper feed cassettes 61, 62, 63, 64 arranged in the vertical direction of FIG. 1 and the pickup rollers 71 arranged corresponding to the respective paper feed cassettes 61 to 64. , 72, 73, 74 and separating and conveying means 86, 87, 88, 89. The sheet feeding cassettes 61 to 64 are configured in a front loading type that accommodates the sheet S and is detachably mounted from the front side (the front side in FIG. 1) of the image forming apparatus main body 100.

Sheet transport process
In the image forming apparatus 90, the sheet S is stored so as to be respectively stacked on the sheet feeding cassettes 61 to 64 of the image forming apparatus main body 100, and by the corresponding pickup rollers 71 to 74 in the image forming units 1Y to 1K. The sheet is fed according to the image formation timing of The sheet S fed out by the pickup rollers 71 to 74 passes through the conveying vertical path 81 and is conveyed to the registration roller pair 76.

  The registration roller pair 76 has a function of correcting the skew feeding by causing the leading edge of the sheet S to conform to the sheet S by abutting the sheet S conveyed from the sheet feeding cassettes 61 to 64 to form a loop. Furthermore, the registration roller pair 76 has a function of conveying the sheet S to the secondary transfer portion at a predetermined timing in accordance with the toner image carried on the intermediate transfer belt 31 after the skew feeding correction. The secondary transfer portion is a secondary transfer nip portion N2 formed by the opposing secondary transfer inner roller 32 and the secondary transfer outer roller 41, and a sheet is applied by applying a predetermined pressure and an electrostatic load bias. The toner image is secondarily transferred onto the top.

  Thereafter, the sheet S is conveyed to the fixing device 5 by the pre-fixing conveyance device 42. The fixing device 5 is configured to melt and fix the toner image on the sheet S by adding a predetermined pressure force by the opposing roller or belt and a heating effect generally by a heat source such as a heater. The image forming unit 1 forms an image on the sheet S conveyed by the image forming unit 1 (1Y, 1M, 1C, 1K), the secondary transfer nip portion (secondary transfer portion) N2, the fixing device 5 and the like. Configured

  In the single-sided image forming mode, the image is discharged from the discharge port 50 out of the apparatus according to the user's designation. On the other hand, in the case of the double-sided image forming mode, the sheet S is sent again to the image forming units 1Y to 1K through the reverse path 52 and the double-sided conveying path 85 by the path switching unit 51. Reference numeral 77 in FIG. 1 denotes a conveyance roller pair which sends the sheet S fed from the pickup rollers 71 to 74 to the registration roller pair 76.

  On the other hand, as shown in FIG. 1, the paper deck 101 includes sheet storage sections 92, 93, 94 arranged vertically in the deck, and suction conveyance sections arranged corresponding to the respective sheet storage sections 92 to 94. 201, 202, 203 and a drawing roller pair 95, 96, 97. In the present embodiment, as the suction conveyance unit, a method is employed in which the sheet S is adsorbed to the conveyance belt by the negative pressure of air and separated and conveyed. The paper deck 101 is provided with a transport roller pair 301 which further transports the sheet S which has been drawn and conveyed via the drawing roller pairs 95 to 97 further downstream. The paper deck 101 further includes a discharge roller pair 302 that sends the sheet S fed by the conveyance roller pair 301 to the apparatus main body entrance roller pair 91 on the image forming apparatus main body 100 side. A sheet conveying device 65 having a curved conveying path 80 communicating with a portion of the apparatus main body inlet roller pair 91 of the image forming apparatus main body 100 is provided downstream of the discharge roller pair 302. The sheet conveying device 65 is located in the vicinity of a connection point between the paper deck (sheet supply unit) 101 and the image forming apparatus main body 100.

[Sheet conveying device]
Next, the sheet conveying device 65 according to the present embodiment will be described with reference to FIGS. 2 (a) and 2 (b) and FIGS. 3 (a) and 3 (b). FIGS. 2A and 2B are cross-sectional views of the sheet conveying apparatus 65 according to the present embodiment taken along the sheet conveying direction, and are used in the apparatus main body inlet roller pair 91 of the image forming apparatus main body 100 shown in FIG. 5 shows a conveyance path for delivering a sheet fed from a feeding unit of a paper deck 101. FIGS. 3A and 3B are cross-sectional views of the sheet conveying device 65 according to the present embodiment, taken along different conveying directions, in different states.

  As shown in FIGS. 2A and 2B, the sheet conveying device 65 in the present embodiment includes a first conveying guide pair 310 disposed on the upstream side in the sheet conveying direction and a second conveying guide disposed on the downstream. A pair 320 is provided. In the first conveyance guide pair 310, the first outer guide 311 and the first inner guide 312 are disposed to face each other with a gap between them so as to guide the sheet S. Further, in the second conveyance guide pair 320, the second outer guide 321 and the second inner guide 322 are disposed to face each other with a gap. The second conveyance guide pair 320 is in communication with the first conveyance guide pair 310 at a predetermined angle α, and the second conveyance guide pair 320 forms a curved conveyance path 80 with the first conveyance guide pair 310 to perform the first conveyance. The sheet S guided by the pair of guides 310 can be guided. A sheet delivery unit 84 is configured between the first conveyance guide pair 310 and the second conveyance guide pair 320.

  As shown in FIG. 2A, the second conveyance guide pair 320 is provided to the sheet discharge portion of the paper deck 101 so as to correspond to the apparatus main body entrance roller pair 91 disposed in the sheet reception portion on the image forming apparatus main body 100 side. Is arranged. On the paper deck 101 side, a curved guide pair 330 composed of a curved lower guide 331 and a curved upper guide 332 fixedly supported at mutually opposing positions is provided between the conveying roller pair 301 and the discharge roller pair 302. It is arranged.

  The conveying roller pair 301 is composed of a lower roller 301a and an upper roller 301b. The discharge roller pair 302 is composed of an inner roller 302a and an outer roller 302b. In the present embodiment, a stainless steel material with high wear resistance is used as the material of the guides such as the curved guide pair 330, the first conveyance guide pair 310, and the second conveyance guide pair 320.

  As shown in FIG. 3A, the second conveyance guide pair 320 is provided in the vicinity of the sheet delivery unit 84 between the first conveyance guide pair 310 (provided on the paper deck side). It is being fixed to the support plate 53 rotatably supported by the moving shaft 401 as a fulcrum. Thus, the second conveyance guide pair 320 is rotatably supported with respect to the paper deck (apparatus main body) 101. For this reason, the second conveyance guide pair 320 is rotated from the paper deck 101 to the image forming apparatus main body by rotating the second conveyance guide pair 320 according to the variation in height when the image forming apparatus main body 100 and the paper deck 101 connected thereto are installed. Smooth delivery of sheets to 100 is possible. The pivoting range of the support plate 53 is limited to a fixed angle by a stopper (not shown).

  As shown in FIG. 3B, the door portion 54 is rotatably supported around the sheet delivery portion 84 with the second pivot shaft 402 provided on the paper deck 101 as a fulcrum. The door portion 54 is provided with a first outer guide 311, a curved lower guide 331, and an outer roller 302 b of the discharge roller pair 302. As a result, when a jam (paper jam) occurs in the curved conveyance path 80, the user opens the door 54 to move the first outer guide 311 and the lower curved guide 331, and the first conveyance guide pair 310 is moved. And the curved guide pair 330 is opened, allowing the sheet to be removed.

The sheet S fed by any of the suction conveyance units 201, 202, and 203 shown in FIG. 1 is conveyed to the discharge roller pair 302 through the conveyance roller pair 301, and is passed through the first conveyance guide pair 310. The leading end of the sheet S reaches the second conveyance guide pair 320 (not shown in FIG. 1). As shown in FIG. 2A, the first outer guide 311 is located outside the curvature of the curved conveyance path 80 in the first conveyance guide pair 310. The first outer guide 311 bends from the upstream portion of the first outer guide 311 at a predetermined angle α with respect to the second outer guide 321 located outside the curvature of the curved conveyance path 80 in the second conveyance guide pair 320. It has the bending extension part 311a which extends. Incidentally, as shown in FIG. 4 (b), the bent extended portion 311a of the first outer guide 311 is bent at a bending angle alpha _1.

  As shown in FIGS. 2A and 2B, the first inner guide 312 is located inside the curvature of the curved conveyance path 80 in the first conveyance guide pair 310. The downstream end in the sheet conveying direction A in the bending extension portion 311 a is extended to the second outer guide 321 side beyond a position intersecting the extension line B linearly extending along the inner surface of the first inner guide 312 . The extension line B is a conveyance locus of the sheet when the sheet having high rigidity such as thick paper is conveyed by the discharge roller pair 302. That is, a highly rigid sheet such as cardboard is conveyed along the inner surface of the first inner guide 312.

  The bending extension portion 311 a of the first outer guide 311 is bent and extended so as to have a predetermined angle α with respect to the second outer guide 321 positioned outside the curve of the curved conveyance path 80 of the second conveyance guide pair 320. It will be set up. As a result, a sheet having high rigidity, such as a thick paper or an envelope, is conveyed while being bent stepwise, so that the sheet can be stably conveyed.

Here, as shown in FIG. 4 (a), (b) , the angle formed between the bending angle alpha ₁ of the bent extended portion 311a of the first outer guide 311, and the elastic guide member 313 and the second outer guide 321 The angles α ₂ and α ₂ are set to be substantially equal to each other. As a result, the leading end of the conveyed sheet S always contacts the bending and extending portion 311 a, and the traveling direction thereof is changed along the conveying surface of the sheet delivery portion 84.

  An elastic guide member 313 which is capable of elastically contacting (elastically contactable) on the inner surface of the second outer guide 321 is attached to the bending extension portion 311 a, which extends downstream in the sheet conveying direction A. The elastic guide member 313 is fixed to the downstream end portion of the bending and extending portion 311 a in the sheet conveying direction A. In the present embodiment, the elastic guide member 313 is made of a spring stainless steel thin plate having a rigidity lower than that of the stainless steel used for each conveyance guide.

  Further, as shown in FIGS. 4A and 4B, the second outer guide further extends to the downstream end of the sheet conveyance direction A on the surface (back surface) opposite to the conveyance surface of the elastic guide member 313. A sheet member 314 made of resin (plastic) is attached to the inner surface of the sheet 321. The downstream end of the sheet-like member 314 in the sheet conveying direction A protrudes more toward the second outer guide than the downstream end of the elastic guide member 313.

  Therefore, when the support plate 53 for supporting the second conveyance guide pair 320 shown in FIG. 3A and the door 54 for supporting the first outer guide 311 etc. shown in FIG. It will be. That is, at the time of this rotation, the elastic guide member 313 comes into contact with the second outer guide 321 via the sheet-like member 314 and is elastically deformed. Thus, the sheet S such as a thick sheet or an envelope can be more stably and smoothly delivered from the first conveyance guide pair 310 to the second conveyance guide pair 320 by the elastic guide member 313. Furthermore, since the elastic guide member 313 does not directly abut on the second outer guide 321 by the sheet-like member 314, damage to the second outer guide 321 is reduced, and conveyance defects due to scratches on the second outer guide 321, etc. It will be possible to prevent.

  In this case, the front end of the sheet S is in contact with the second outer guide 321 in the order of the bending extension portion 311a and the elastic guide member 313 in order, and the sheet S is further gently bent via the sheet-like member 314. 2 Contact the outer guide 321. Since the predetermined angle α (see FIG. 2A) when the sheet S abuts on the second outer guide 321 is a small angle, the impact at the time of contact of the sheet S being conveyed can be sufficiently mitigated.

  Here, with reference to FIGS. 5A and 5B and FIGS. 6A and 6B, a comparative example to the present embodiment will be described. 5A is a cross sectional view of the sheet conveying apparatus in the comparative example in the conveyance direction, and FIG. 5B is a cross sectional view of the sheet conveying apparatus in the state different from FIG. 5A. FIG. 6A is a cross-sectional view of the sheet conveyance device in the conveyance direction in the comparative example, and FIG. 6B is a cross-sectional view of the sheet conveyance device in the conveyance direction in a state different from FIG.

  That is, as shown in FIG. 5A, the curved conveyance path 80 has the delivery of the first conveyance guide pair 310 and the second conveyance guide pair 320, and the curved conveyance path 80 is formed as shown in FIG. In the configuration in which the guide of (1) is rotatably provided with the shaft as a fulcrum, the following is required. That is, it is necessary to position the guide end of the bending extension portion 311 a or the like in the sheet delivery portion in a range in which the guides do not interfere with each other at the time of swinging.

  Therefore, as shown in FIG. 5A, the leading end of the sheet S conveyed in the sheet conveyance direction A comes in contact with the second outer guide 321 at a relatively large contact angle β. For this reason, when the sheet S is a thick paper or envelope having high rigidity, the conveyance resistance is rapidly increased, and a problem arises that the conveyance drive motor (not shown) is enlarged.

  Further, as shown in FIG. 6A, when the elastic guide member 313 is simply attached to extend the lower end portion 311b in order to allow interference between the guides in the curved conveyance path 80, the following occurs. That is, as shown in FIG. 6B, since the elastic guide member 313 is deformed so as to be simply bent by the high rigidity of the sheet S at the time of conveyance, the contact angle γ between the sheet front end portion and the elastic guide member 313. Becomes large. For this reason, it becomes inadequate as a countermeasure which makes contact angle (gamma) small.

  On the other hand, in the present embodiment, the problems as described in FIGS. 5A and 5B and FIGS. 6A and 6B can be solved. That is, with regard to the conveyance of a sheet such as thick paper having high rigidity, in a configuration in which there is sheet delivery in the curved conveyance path 80, sheet conveyance with a relatively low conveyance load is possible with a bending angle that allows conveyance of plain paper. It becomes. This makes it possible to provide a compact and stable sheet conveying device 65. Then, it is possible to suppress the conveyance load of the sheet S at the time of sheet conveyance, to prevent conveyance failure in the curved conveyance path 80, and to avoid enlargement of the conveyance motor (not shown). Become. Furthermore, it is possible to prevent the collision noise of the front end of the seat.

  Therefore, according to the present embodiment, the sheet can be conveyed with a relatively low conveyance load at a bending angle at which conveyance of plain paper having a stiffness lower than that of thick paper is possible, and a stable sheet conveyance device 65 can be provided.

  In this embodiment, the material of the conveyance guides such as the first conveyance guide pair 310, the second conveyance guide pair 320, and the curved guide pair 330 is stainless steel, and the material of the elastic guide member 313 is stainless steel thin plate for spring. Is possible, but not limited thereto. For example, the same effect can be realized by making the material of the transport guide the electrogalvanized steel plate and making the material of the elastic guide member 313 a polyester film. The sheet-like member 314 can also be made of a polyester film or the like.

  1, 5, N 2 ... image forming unit, fixing device, secondary transfer nip (image forming means) / 65 ... sheet conveying device / 80 ... curved conveyance path / 84 ... sheet delivery unit / 90 ... image forming device / 100 ... Image forming apparatus main body / 101: paper deck (apparatus main body, sheet supply unit) / 310: first conveyance guide pair / 311: first outer guide / 311 a: bending extension portion / 312: first inner guide / 313: elastic Guide member / 314 ... sheet-like member / 320 ... second conveyance guide pair / 321 ... second outer guide / 401 ... first rotation axis / 402 ... second rotation axis / B ... extension line / S ... sheet / α ... predetermined angle

Claims (9)

A first transport guide pair disposed oppositely to guide the sheet;
A curved conveyance path is formed by the first conveyance guide pair, and the second conveyance guide pair is disposed so as to be able to guide the sheet guided by the first conveyance guide pair,
The first transport guide pair has a first outer guide located outside the curve of the curved transport path, and a first inner guide located opposite to the first outer guide.
The first outer guide is
A bending and extending portion that bends and extends so as to have a predetermined angle with respect to a second outer guide positioned outside the curvature of the curved conveyance path in the second conveyance guide pair ;
And an elastic guide member disposed in the bending and extending portion and extending downstream in the sheet conveying direction ,
The first outer guide is rotatably supported relative to the device body,
The first inner guide includes a conveyance surface at a position opposite to the conveyance surface of the first outer guide that extends from the bending point of the bending and extending portion toward the upstream of the sheet conveyance direction.
The downstream end of the bending extension portion in the sheet conveying direction is a position where the extension portion linearly extending on the downstream side of the sheet conveying direction along the conveying surface of the first inner guide intersects the bending extension portion Extended beyond the second outer guide side ,
The elastic guide member elastically deforms when the first outer guide pivots.
Sheet conveying apparatus characterized in that. The second conveyance guide pair is rotatably supported with respect to the apparatus main body with a first rotation axis provided in the vicinity of the sheet delivery unit between the first conveyance guide pair and the second conveyance guide pair as a fulcrum.
The sheet conveying apparatus according to claim 1, The first outer guide is pivotable relative to the apparatus main body with a second pivot shaft provided in the vicinity of the sheet delivery portion between the second transport guide pair and the first transport guide pair as a fulcrum Supported,
The sheet conveying apparatus according to claim 1 or 2, wherein The elastic guide member further includes a resin-made sheet-like member which is extended to the downstream end in the sheet conveying direction and which can elastically contact the inner surface of the second outer guide.
The sheet conveying apparatus according to any one of claims 1 to 3, wherein A sheet conveying apparatus according to any one of claims 1 to 4 .
An image forming unit that forms an image on a sheet to be conveyed;
An image forming apparatus characterized by A sheet feeding unit for feeding sheets;
An image forming apparatus main body connected to the sheet supply unit and having an image forming unit for forming an image on a sheet;
A sheet conveying apparatus is provided in the vicinity of a connection point between the sheet supply unit and the image forming apparatus main body, and the sheet conveying apparatus
A first transport guide pair disposed oppositely to guide the sheet;
A curved conveyance path is formed by the first conveyance guide pair, and the second conveyance guide pair is disposed so as to be able to guide the sheet guided by the first conveyance guide pair,
The first transport guide pair has a first outer guide located outside the curve of the curved transport path, and a first inner guide located opposite to the first outer guide.
The first outer guide is
A bending and extending portion that bends and extends so as to have a predetermined angle with respect to a second outer guide positioned outside the curvature of the curved conveyance path in the second conveyance guide pair ;
And an elastic guide member disposed in the bending and extending portion and extending downstream in the sheet conveying direction ,
The first outer guide is rotatably supported relative to the device body,
The first inner guide includes a conveyance surface at a position opposite to the conveyance surface of the first outer guide that extends from the bending point of the bending and extending portion toward the upstream of the sheet conveyance direction.
The downstream end of the bending extension portion in the sheet conveying direction is a position where the extension portion linearly extending on the downstream side of the sheet conveying direction along the conveying surface of the first inner guide intersects the bending extension portion Extended beyond the second outer guide side ,
The elastic guide member elastically deforms when the first outer guide pivots.
An image forming apparatus characterized by The second conveyance guide pair is rotatably supported with respect to the apparatus main body with a first rotation axis provided in the vicinity of the sheet delivery unit between the first conveyance guide pair and the second conveyance guide pair as a fulcrum .
The image forming apparatus according to claim 6 , The first outer guide is pivotable relative to the apparatus main body with a second pivot shaft provided in the vicinity of the sheet delivery portion between the second transport guide pair and the first transport guide pair as a fulcrum Supported ,
The image forming apparatus according to claim 6 or 7, wherein The elastic guide member further includes a sheet-like member extending to a downstream end in the sheet conveying direction and capable of elastically contacting the inner surface of the second outer guide.
The image forming apparatus according to any one of claims 6 to 8, wherein

Images