JP6590959B2 - Sheet conveying apparatus and image forming apparatus - Google Patents

Description

  The present invention relates to a sheet conveying apparatus that conveys a sheet, and an image forming apparatus including the sheet conveying apparatus.

In an image forming apparatus such as a printer or a copying machine, a sheet is conveyed by a conveyance roller.

Further , a driven roller is pressed against the transport roller . Driven roller is pressing the conveying roller by a pressure spring.

Japanese Patent Laid-Open No. 06-144633

However, it has been desired to stabilize the pressure force of the pressure spring.

An object of the present invention is to provide an image forming apparatus provided with pressurized possible sheet conveying apparatus and which the conveying roller driven roller at a stable pressure.

In order to achieve the above object, a typical configuration of the present invention includes a conveyance roller that conveys a sheet in the sheet conveyance direction, a driven roller that rotates following the conveyance roller, and rotatably supports the driven roller. A shaft, a first spring for pressing the driven roller against the conveying roller, a second spring for pressing the driven roller against the conveying roller, and one end of the shaft are supported on the frame. A first support member disposed in the groove or hole, a second support member that supports the other end of the shaft and disposed in the groove or hole provided in the frame, and a direction along the axis of the shaft Between the driven roller and the first support member at a distance from the first support member and supported by the shaft so as to be rotatable about the axis of the shaft, First subject to pressure And Ne receiving member, disposed at a second support member and the spacing between the driven roller and the second support member in a direction along the axis of the shaft, and can be rotated about the axis of said shaft A second spring receiving member that is supported by the shaft and receives a pressure force of the second spring, and the first spring receiving member can rotate about the axis, and the second spring receiving member cross ready to rotate about the axis, the driven roller, the shaft, the first spring bearing member and the second spring receiving member, said axis in a direction which integrally, intersecting the sheet conveying direction in a relationship permitting them to move relative to the frame in a direction, wherein the relation between the first support member and the second supporting member and the groove or hole is.

ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the apparatus which can pressurize a driven roller to a conveyance roller with the stable pressurization force .

Image forming apparatus provided with sheet conveying apparatus of the present invention Schematic explaining the sheet conveying apparatus of the present invention (opening and closing guide is closed) Schematic explaining the sheet conveying apparatus of the present invention (opening and closing guide is in an open state) Schematic sectional view for explaining the driven roller portion of the sheet conveying apparatus of the present invention (A) (b) (c) (d) (e) is a schematic diagram for explaining the states of the driving roller and the driven roller of the sheet conveying apparatus of the present invention. Schematic explaining the fluctuation of the conveying pressure of the sheet conveying apparatus of the present invention Schematic explaining another embodiment of the sheet conveying apparatus of the present invention Schematic explaining another embodiment of the sheet conveying apparatus of the present invention Schematic explaining another embodiment of the sheet conveying apparatus of the present invention

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, and relative arrangements of the 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. Therefore, unless specifically stated otherwise, the scope of the present invention is not intended to be limited thereto.

  An image forming apparatus including a sheet conveying apparatus according to the present embodiment will be described with reference to FIG. FIG. 1 is a schematic sectional view of an image forming apparatus provided with a sheet conveying apparatus employing the present invention.

  First, the document is automatically sent to the reading position by the document conveying unit 120, and the image information is read by the image reading unit 130. The read image information is processed by a controller (not shown), and laser light is emitted from the laser scanner unit 111 by a signal based on the processing result, and an electrostatic latent image is formed on the photosensitive drum 112.

  A sheet feeding device is disposed below and on the right side of the image forming apparatus. The sheet feeding apparatus includes a storage 11 that can be pulled out from the apparatus main body, and an air feeding type sheet feeding mechanism that includes a conveyance belt 21 and the like. The sheets stored in the storage 11 are fed to the image forming unit by the sheet feeding mechanism.

  In the image forming unit, the electrostatic latent image on the photosensitive drum is developed by the developing unit 113, and the developed toner image on the photosensitive drum is transferred in the transfer unit 118 to a sheet synchronized in the registration unit 117. The Further, the sheet is guided to the fixing roller pair 114, heated and pressurized, fixed, and discharged.

  Next, a vertical path conveyance unit 200 as a sheet conveyance device provided in the image forming apparatus will be described. 2 to 5 are detailed views of the vertical path transport unit 200. FIG. 2 and 3 are perspective views of the vertical path transport unit, FIG. 4 is a sectional view of the driven roller portion, and FIGS. 5A to 5E are schematic views of the roller pair. In the following description, the back side and the near side are the one side and the other side in the width direction perpendicular to the sheet conveying direction, respectively.

  2 and 3, the vertical path transport unit 200 includes a fixed guide unit 210 and an open / close guide unit 220, and the open / close guide unit 220 can be opened and closed with respect to the fixed guide unit 210 by an open / close hinge 227. It has become. The fixed guide unit 210 is provided with a fixed guide 211 as a conveyance guide for guiding sheets, positioning pins 212 and 213 on the front side and the back side, and a magnet 214. The open / close guide unit 220 includes an open / close guide 221 as a conveyance guide for guiding a sheet, a handle 222, front and rear positioning bearings 223 and 224, a magnet attracting unit 225, a guide abutting unit 226, and a follower A roller unit 230 is provided.

  Thus, in this embodiment, one roller (here, the driving roller 215) is provided in the fixed guide unit, and the other roller (here, the driven roller 233 of the driven roller portion 230) facing the one roller is opened and closed. It is provided in the guide unit. Accordingly, the driven roller 233 and the drive roller 215 can be brought into contact with or separated from each other by opening and closing the open / close guide unit with respect to the fixed guide unit.

  2, when the opening / closing guide unit 220 is closed, the positioning pins 212, 213 on the near side and the back side and the positioning bearings 223, 224 on the near side and the back side of the opening / closing guide 221 with respect to the fixed guide unit 210 are provided. The position in the vertical direction (sheet conveyance direction) is determined. Further, the open / close guide 221 is fixed to the fixed guide unit 210 by the magnet 214 and the magnet attracting portion 225. At this time, the position of the magnet 214 is adjusted so that the guide abutting portion 226 is abutted against the fixed guide 211.

  The fixed guide unit 210 is provided with a driving roller 215 as a conveying roller having two rubber portions 215a and 215b on the metal shaft 215c. The driving roller 215 is supported by the fixed guide unit 210 so as to be rotationally driven. Yes. The drive roller 215 is rotated by a drive force from a drive motor (drive source) (not shown).

  As shown in FIG. 4, a driven roller shaft 232 is supported by a driven roller section 230 of the opening / closing guide unit 220 so as to be rotatable by a bearing 234. The driven roller shaft 232 is moved in a direction in which the driven roller 233 comes into contact with or separates from the driving roller 215 in a direction orthogonal to the sheet conveying direction by a bearing 231 fitted in a U groove or a long hole formed in the frame. It is supported movably. On the driven roller shaft 232 of the driven roller 233, a spring holder 235 that receives the pressure force of the pressure spring 236 is rotatably supported. The pressure spring 236 is a coil spring in the present embodiment, and both ends thereof are attached to the spring hook portion 237 and the coil portion is attached so as to be partially wound around the spring holder 235. Therefore, the driven roller 233 is pressed toward the driving roller (pressing direction) by the pressing spring 236 via the spring holder 235. The driven roller 233 is disposed so as to face the driving roller 215, and can be rotated by being driven by the driving roller 215 in a state where the driven roller 233 is pressed by the pressure spring 236 and pressed against the driving roller 215. The bearing 231 supports the driven roller 233 so that the driven roller 233 can move in a direction in contact with or away from the driving roller 215, and functions as a support unit that restricts the movement of the driven roller 233 in the sheet conveyance direction. In this embodiment, the spring holder 235 is rotatably supported by the driven roller shaft 232. However, the spring holder 235 may be rotatably supported by the driven roller 233. That is, the spring holder 235 may be provided so as to be rotatable about the axis X of the driven roller 233.

  FIG. 6 shows a variation in the applied pressure with respect to a variation in the position of the driven roller when the pressure spring 236 in this embodiment is used with respect to the conventional pressure spring 256. FIG. 10 shows the positions of the conventional driving roller and driven roller with respect to the guide. FIG. 5A shows the ideal positions of the driving roller and the driven roller with respect to the guide.

  Compared with the conventional configuration in which the driven roller shaft 252 is pressed by the pressure spring 256, in this embodiment, a spring holder 235 is rotatably provided on the driven roller shaft 232, and the spring holder 235 is applied to the pressure spring 236. In response, the driven roller 233 is pressed toward the drive roller. Therefore, when the nip pressure with the drive roller is increased, the spring length can be increased by the above-described spring holder 235 as compared with the conventional configuration, so that the spring constant can be reduced. Further, a component force is generated in the angle θ direction smaller than the conventional angle θ0 with respect to the pressure force F0 direction, and the component force becomes a component force f smaller than the conventional component force f0. It becomes possible to suppress pressure fluctuations. Further, since the spring holder 235 does not affect the bearing 231, the frictional resistance does not change in the pressurizing direction, and the applied pressure is stabilized.

  FIG. 5B shows a case where the driving roller 215 moves closer to the driven roller portion 230 and the pressure spring 236 extends to increase the applied pressure. Assuming that the amount of deviation ΔD1 at this time is as shown in FIG. 6, the amount of deviation Δf1 of the pressing force of the pressure spring 236 of the present embodiment is greatly reduced with respect to the amount of deviation ΔF1 of the pressing force of the conventional pressure spring 256. I understand that.

  On the other hand, FIG. 5C shows a case where the driving roller 215 is shifted to the side away from the driven roller portion 230 due to the bending of the driving roller shaft 215c, the pressure spring 236 is contracted, and the pressing force is reduced. Assuming that the amount of deviation ΔD2 at this time is as shown in FIG. 6, the amount of deviation Δf2 of the pressing force of the pressure spring 236 of the present embodiment is significantly reduced with respect to the amount of deviation ΔF2 of the pressing force of the conventional pressure spring 256. I understand that.

  Further, as shown in FIG. 5A, the spring holder 235 is formed in a circular arc shape that receives the pressing force of the flat facing portion 235a facing the open / close guide 221, the relief surface 235b of the spring hooking portion, and the pressure spring 236. A spring receiving portion 235c. In the spring holder 235, the facing portion 235a is provided opposite to the open / close guide 221 on the opposite side to the spring receiving portion 235c that is an arcuate portion via the center of rotation (the shaft 232). Here, the facing portion 235a is a plane along the back surface of the facing opening / closing guide 221 (the surface on the back side of the guide surface for guiding the sheet), and is formed by a surface substantially parallel to the back surface of the opening / closing guide 221. The spring holder 235 has a first dimension 235d from the rotation center of the spring holder 235 to the relief surface 235b in the sheet conveyance direction, and the circumference of the spring receiving portion 235c from the rotation center in a direction (pressure direction) perpendicular to the sheet conveyance direction. Assuming that the second dimension 235e up to the top of the surface is a dimensional relationship of “235e> 235d”.

  FIG. 5D shows a state in which the spring holder 235 has been rotated in the direction of arrow A due to sheet jamming (sheet jam) or the like. From this state, when the opening / closing guide 221 is opened in the direction of arrow B as shown in FIG. 5E, the driven roller 233 is separated from the driving roller. At that time, the spring holder 235 is pressed toward the driving roller by the pressure spring 236, and the facing portion 235 a is rotated and aligned in the direction of the arrow A ′ with respect to the opening / closing guide 221. When the opening / closing guide 221 is closed again from the state shown in FIG. 5 (e), the opposing portion 235a is substantially brought into contact with the opening / closing guide 221 by the frictional force between the spring holder 235 and the pressure spring 236 as shown in FIG. 5 (a). The pressure is maintained while maintaining parallelism.

  As described above, by providing the driven roller 233 with the spring holder 235 that receives the pressure force of the pressure spring 236, the spring constant of the pressure spring 236 can be reduced while reducing the size, and the pressure fluctuation is suppressed and the spring is reduced. The pressure can be stabilized. In addition, this configuration with little pressure fluctuation can prevent clogging and skewing of the sheet and improve the operability of the open / close guide. Further, the facing portion 235 a of the spring holder 235 contacts the opening / closing guide 221, so that the facing portion 235 a of the spring holder 235 is in a substantially parallel state along the opening / closing guide 221 by the frictional force between the spring holder 235 and the pressure spring 236. Can keep.

  In the above-described embodiment, the planar portion facing the open / close guide 221 of the spring holder 235 is the facing portion, but the present invention is not limited to this. For example, as shown in FIG. 7, two protrusions 235 f that contact the opening / closing guide 221 may be provided as the facing portion. The number of the protrusions 235f is not limited to two, but may be at least two. In the case of three or more, the protrusions 235f may be formed so that the tips of the protrusions abut against the open / close guide 221. . That is, when the opening / closing guide 221 is opened, the projection 235f comes into contact with the opening / closing guide 221 and returns to the state shown in FIG. 5 (e) when the opening / closing guide 221 is in the state shown in FIG. 5 (d). Just do it. Further, the dimensional relationship “235e> 235d” of the first dimension 235d from the rotation center of the spring holder 235 to the circumferential surface in the sheet conveying direction and the second dimension 235e from the rotation center to the circumferential surface in the pressing direction is The spring constant can be further reduced by drastically changing. Further, since the component force is generated in the direction of the angle θ ′ smaller than the conventional angle θ0 with respect to the direction of the applied pressure F0 and becomes the component force f ′ smaller than the conventional component force f0, the pressure fluctuation is greatly suppressed. be able to.

  In the above-described embodiment, the open / close guide unit 220 has been described as an example, but the present invention is not limited to this. For example, as shown in FIG. 8, the present invention can also be applied to a conveyance unit (sheet conveyance device) configured to fasten a detachable guide unit 260 that can be attached to and detached from a fixed guide unit with a fixed screw 262. The attachment / detachment guide unit 260 has a driven roller portion 230 having the same configuration as that of the above-described embodiment. The attachment / detachment guide unit 260 is assembled so that the facing portion 235 a of the driven roller portion 230 faces the attachment / detachment guide 261. In this case, before the serviceman assembles the attachment / detachment guide unit 260, the state shown in FIG. 5E, that is, the opposed portion 235 a of the spring holder 235 is in close contact with the attachment / detachment guide 261. When the attachment / detachment guide unit 260 is fixed to the screw, the state shown in FIG. 5A, that is, the facing portion 235 a is pressed while being substantially parallel to the attachment / detachment guide 261 by the frictional force between the spring holder 235 and the pressure spring 236. . For this reason, also in this embodiment, the same effect as the above-described embodiment can be obtained.

  In the above-described embodiments, the configuration in which the open / close guide side moves has been described, but the present invention can also be applied to a configuration in which the drive roller side moves as shown in FIG. The driving roller 300 includes a driving roller shaft 301, a roller conveyance surface 302 that is a peripheral surface facing the driven roller, and a notch 303 provided in a part of the roller conveyance surface 302. As shown in FIG. 9A, when the driven roller portion 230 faces the notch portion 303 of the driving roller 300, the driven roller portion 230 is pressed toward the driving roller 300 side. Therefore, the facing portion 235a of the spring holder 235 is brought into close contact with the open / close guide 221. On the other hand, when the driving roller 300 rotates in the direction of arrow C as shown in FIG. 9B, the driven roller portion 230 is pushed up by the roller conveying surface 302 to the opposite side of the pressure direction, and the spring holder 235 and the pressure spring The opposing portion 235 a is in a pressurized state while being substantially parallel to the open / close guide 221 due to the frictional force with 236. For this reason, also in this embodiment, the same effect as the above-described embodiment can be obtained.

  In the above-described embodiments, the copying machine is exemplified as the image forming apparatus, but the present invention is not limited to this. For example, it may be another image forming apparatus such as a scanner, a printer, a facsimile machine, or another image forming apparatus such as a multi-function machine combining these functions. Similar effects can be obtained by applying the present invention to a sheet conveying apparatus used in these image forming apparatuses.

  In the above-described embodiments, the vertical path conveyance unit 200 as the sheet conveyance device provided in the image forming apparatus has been described as an example. However, the present invention is not limited to this, and the image forming apparatus is provided. The present invention is effective even when applied to other sheet conveying apparatuses.

  Further, in the above-described embodiments, the sheet conveying apparatus that conveys a sheet such as a recording sheet as a recording target is exemplified, but the present invention is not limited to this. For example, the same effect can be obtained even if the present invention is applied to a sheet conveying apparatus that conveys a sheet such as a document to be read.

200 ... vertical path transport unit 210 ... fixed guide unit 211 ... fixed guides 212 and 213 ... positioning pins 214 ... magnets 215 ... drive rollers 215a and 215b ... rubber part 215c ... metal shaft 220 ... open / close guide unit 221 ... open / close guide 222 ... handle 223, 224 ... Bearing 225 ... Magnet attracting part 226 ... Guide abutting part 227 ... Opening / closing hinge 231 ... Bearing 232 ... Followed roller shaft 233 ... Followed roller 234 ... Bearing 235 ... Spring holder 235a ... Opposing part 235b ... Flank 235c ... Spring Hook 235f ... Projection 236 ... Pressure spring 237 ... Spring hook 260 ... Removable guide unit 261 ... Removable guide 300 ... Drive roller 301 ... Drive roller shaft 302 ... Roller conveying surface 303 ... Notch

Claims (16)

A transport roller for transporting the sheet in the sheet transport direction;
A driven roller that rotates following the conveying roller;
A shaft that rotatably supports the driven roller;
A first spring for pressing the driven roller against the transport roller;
A second spring for pressing the driven roller against the transport roller;
A first support member that supports one end of the shaft and is disposed in a groove or hole provided in the frame;
A second support member that supports the other end of the shaft and is disposed in a groove or hole provided in the frame;
The shaft is disposed between the driven roller and the first support member in a direction along the axis of the shaft so as to be spaced from the first support member and is rotatable about the axis of the shaft. A first spring receiving member that is supported and receives a pressure force of the first spring;
The shaft is disposed so as to be spaced from the second support member between the driven roller and the second support member in a direction along the axis of the shaft, and is rotatable about the axis of the shaft. A second spring receiving member that is supported and receives the pressure of the second spring;
The driven roller, the shaft, the first spring receiving member, and the second spring receiving member in a state where the first spring receiving member can rotate about the axis and the second spring receiving member can rotate about the axis. member is integrally, in a relationship permitting them to move relative to the frame in a direction crossing the sheet conveying direction in a direction crossing the axis, wherein the first support member and the second supporting member There is a relationship between the groove and the hole . The first spring receiving member is supported by the shaft so that the driven roller can rotate around the axis of the shaft in a state where the driven roller is pressed against the transport roller by the force from the first and second springs. And
The second spring receiving member is supported by the shaft so that the driven roller can rotate around the axis of the shaft in a state where the driven roller is pressed against the transport roller by the force from the first and second springs. The sheet conveying apparatus according to claim 1, wherein: The frame is movable with respect to the apparatus main body on which the transport roller is disposed,
3. The sheet conveying apparatus according to claim 1, wherein the frame can move from a position where the conveying roller and the driven roller contact each other to a position where the conveying roller and the driven roller are separated from each other. The shaft includes a first roller as the driven roller and a second roller as the driven roller disposed on the other end side of the shaft in a direction along the axis line with respect to the first roller. Supported rotatably,
The first spring receiving member is disposed between the first support member and the first roller in a direction along the axis;
The said 2nd spring receiving member is arrange | positioned between the said 2nd supporting member and the said 2nd roller in the direction along the said axis line, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. Sheet transport device. The transport roller includes a metal shaft, and a first rubber portion and a second rubber portion provided on the metal shaft,
The first driven roller is in contact with the first rubber part,
The sheet conveying apparatus according to claim 4, wherein the second driven roller is in contact with the second rubber portion.   The sheet conveying apparatus according to any one of claims 1 to 4, wherein a conveyance guide that guides a sheet to be conveyed is disposed in the frame. The first spring includes a portion attached to the frame and a portion in contact with the first spring receiving member;
The sheet conveying apparatus according to claim 1, wherein the second spring includes a portion attached to the frame and a portion in contact with the second spring receiving member. The body,
A conveying roller provided in the main body;
An opening / closing unit provided with a guide surface that opens and closes the main body and guides a conveyed sheet;
A driven roller that is provided in the opening and closing unit and that rotates following the conveyance roller;
A shaft provided in the opening / closing unit and rotatably supporting the driven roller;
A first support member that supports one end of the shaft and is disposed in a groove or hole provided in the opening and closing unit;
A second support member that supports the other end of the shaft and is disposed in a groove or hole provided in the opening / closing unit;
A first spring provided in the opening / closing unit;
A second spring provided in the opening / closing unit;
The first spring provided between the first support member and the driven roller in a direction along the axis of the shaft and spaced from the first support member, and pressurizes the driven roller against the transport roller. A first spring receiving member that is supported by the shaft so as to be rotatable about the axis of the shaft;
The second spring provided between the second support member and the driven roller in a direction along the axis of the shaft and spaced from the second support member, and pressurizes the driven roller against the transport roller. A second spring receiving member that is supported by the shaft so as to be rotatable about the axis of the shaft,
The driven roller, the shaft, the first spring receiving member, and the second spring receiving member in a state where the first spring receiving member can rotate about the axis and the second spring receiving member can rotate about the axis. member is integrally, in a relationship permitting them to move relative to the opening and closing unit in a direction intersecting the guide surface, there is the relationship between said first support member and the second support member and the groove or hole ,
In the state where the opening / closing unit is closed, the driven roller is brought into pressure contact with the conveying roller by the pressing force of the first and second springs,
The sheet conveying apparatus, wherein the driven roller is separated from the conveying roller when the opening / closing unit is opened. The shaft includes a first roller as the driven roller and a second roller as the driven roller disposed on the other end side of the shaft in a direction along the axis line with respect to the first roller. Supported rotatably,
The first spring receiving member is disposed between the first support member and the first roller in a direction along the axis;
The sheet conveying apparatus according to claim 7 or 8, wherein the second spring receiving member is disposed between the second support member and the second roller in a direction along the axis. The first spring includes a portion attached to the opening / closing unit and a portion in contact with the first spring receiving member,
10. The sheet conveying apparatus according to claim 8, wherein the second spring includes a portion attached to the opening / closing unit and a portion in contact with the second spring receiving member. 11. The first spring receiving member includes a first arc portion in contact with an outer periphery of the shaft,
11. The sheet conveying apparatus according to claim 1, wherein the second spring receiving member includes a second circular arc portion in contact with an outer periphery of the shaft. The first spring is in contact with a side of the first spring receiving member that is far from the rotation center of the transport roller,
12. The sheet conveying apparatus according to claim 1, wherein the second spring is in contact with a side of the second spring receiving member that is far from a rotation center of the conveying roller. A transport roller;
A driven roller that rotates following the conveyance roller and conveys the sheet in the sheet conveyance direction with the conveyance roller interposed therebetween;
A shaft that rotatably supports the driven roller;
A first support member that supports the shaft on one side of the driven roller in the axial direction of the shaft and is disposed in a groove or slot provided in the frame;
A second support member that supports the shaft on the other side of the driven roller in the axial direction of the shaft and is disposed in a groove or a slot provided in the frame;
A spring for pressing the driven roller against the transport roller;
A spring receiving member that is disposed at a distance from the first support member and the second support member in the axial direction, is supported by the shaft so as to be rotatable about the axis of the shaft, and receives a force from the spring And having
In a state where the spring receiving member can rotate around the axis of the shaft, the driven roller, the shaft, and the spring receiving member are integrally in a direction intersecting the sheet conveying direction and on the axis of the shaft. The sheet conveying apparatus according to claim 1, wherein the first support member, the second support member, and the groove or the hole have a relationship that allows the frame to move relative to the frame. The body,
A conveying roller provided in the main body;
An opening / closing unit provided with a guide surface that opens and closes the main body and guides a conveyed sheet;
A driven roller that is provided in the opening and closing unit and that rotates following the conveyance roller;
A shaft provided in the opening / closing unit and rotatably supporting the driven roller;
A first support member that supports the shaft on one side of the driven roller in the axial direction of the shaft and is disposed in a groove or a slot provided in the opening / closing unit;
A second support member that supports the shaft on the other side of the driven roller in the axial direction of the shaft and is disposed in a groove or a slot provided in the opening / closing unit;
A spring provided in the opening and closing unit;
A spring receiving member that receives a force from the spring for pressurizing the driven roller to the conveying roller;
The spring receiving member is provided at a distance from the first support member and the second support member in the axial direction, and is supported by the shaft so as to be rotatable about the axis of the shaft,
Ready to rotate the spring receiving member about the axis of the shaft, the driven roller, the shaft, the spring receiving member, integrally moves relative to the opening and closing unit in a direction intersecting the guide surface There is a relationship between the first support member and the second support member and the groove or the hole ,
In the state where the opening / closing unit is closed, the driven roller is pressed against the conveying roller by the pressure of the spring,
The sheet conveying apparatus, wherein the driven roller is separated from the conveying roller when the opening / closing unit is opened.   The spring receiving member is supported by the shaft so as to be rotatable about the axis of the shaft in a state where the driven roller is pressed against the transport roller by a force from the spring. Item 15. The sheet conveying apparatus according to Item 13 or 14. The sheet conveying apparatus according to any one of claims 1 to 15, which conveys a sheet;
An image forming unit for forming an image on a sheet;
An image forming apparatus comprising:

Images