MEDIUM CONVEYING APPARATUS, RECORDING APPARATUS, AND POST-PROCESSING APPARATUS

Abstract

A medium conveying apparatus includes a housing in which a paper feeding port is provided, a paper feeding roller configured to convey paper through the paper feeding port, a drive shaft to which the paper feeding roller is attached, the drive shaft extending in a ±Y direction intersecting a conveying direction of the paper, and an elastic roller attached to the drive shaft and configured to prevent sound occurring on the inside of the housing from leaking to the outside of the housing through the paper feeding port. The elastic roller comes into contact with the paper conveyed by the paper feeding roller and removes electric charges of the paper.

Description

The present application is based on, and claims priority from JP Application Serial Number 2023-083735, filed May 22, 2023, the disclosure of which is hereby incorporated by reference herein in its entirety.

BACKGROUND

1. Technical Field

The present disclosure relates to a medium conveying apparatus that conveys a medium, a recording apparatus, and a post-processing apparatus.

2. Related Art

JP-A-2016-137995 describes a paper feeding device of an image forming apparatus that feeds paper with a paper feeding roller through an opening provided in a housing. The paper feeding device includes an elastic roller attached coaxially with the paper feeding roller and, by covering the opening with the paper feeding roller and the elastic roller, prevents noise occurring in the housing from leaking through the opening.

JP-A-2016-137995 is an example of the related art.

However, in JP-A-2016-137995, removal of electricity of paper is not considered at all. When paper set in the paper feeding device is charged or the paper is charged at the time of paper feeding, it is likely that the paper cannot be normally conveyed in the device. For this reason, it is necessary to separately dispose, near the opening, a device for removing electricity of the paper. There is a problem in that the device is increased in size.

SUMMARY

A medium conveying apparatus includes: a housing in which an opening is provided; a conveying roller configured to convey a medium through the opening; a rotating shaft to which the conveying roller is attached, the rotating shaft extending in a medium width direction intersecting a conveying direction of the medium; and a soundproof member attached to the rotating shaft and configured to prevent sound occurring on an inside of the housing from leaking to an outside of the housing through the opening, wherein the soundproof member comes into contact with the medium conveyed by the conveying roller and removes electric charges of the medium.

A recording apparatus includes: a housing in which an opening is provided; a conveying roller configured to convey a medium through the opening; a rotating shaft to which the conveying roller is attached, the rotating shaft extending in a medium width direction intersecting a conveying direction of the medium; a soundproof member attached to the rotating shaft and configured to prevent sound occurring on an inside of the housing from leaking to an outside of the housing through the opening; and a recording unit configured to perform recording on the medium, wherein the soundproof member comes into contact with the medium conveyed by the conveying roller and removes electric charges of the medium.

A post-processing apparatus includes: a housing in which an opening is provided; a conveying roller configured to convey a medium through the opening; a rotating shaft to which the conveying roller is attached, the rotating shaft extending in a medium width direction intersecting a conveying direction of the medium; a soundproof member attached to the rotating shaft and configured to prevent sound occurring on an inside of the housing from leaking to an outside of the housing through the opening; and a post-processing unit configured to perform post-processing on the medium, wherein the soundproof member comes into contact with the medium conveyed by the conveying roller and removes electric charges of the medium.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a configuration diagram illustrating a schematic configuration of a printer according to a first embodiment.

FIG. 2 is an enlarged view illustrating the vicinity of a paper feeding port of the printer according to the first embodiment.

FIG. 3 is a diagram of the paper feeding roller according to the first embodiment viewed from a −X side.

FIG. 4 is an enlarged view illustrating the vicinity of a paper feeding port of a printer according to a second embodiment.

FIG. 5 is a perspective view illustrating a soundproof sheet member according to the second embodiment.

FIG. 6 is an enlarged view illustrating the vicinity of a paper feeding port of another printer according to the second embodiment.

FIG. 7 is a diagram of a paper feeding roller according to a modification viewed from the −X side.

FIG. 8 is a diagram of the paper feeding roller according to the modification viewed from the −X side.

FIG. 9 is a configuration diagram illustrating a schematic configuration of a printer according to the modification.

FIG. 10 is a view illustrating a soundproof sheet member according to the modification.

DESCRIPTION OF EMBODIMENTS

1. First Embodiment

A printer 10 according to a first embodiment is explained below with reference to the drawings.

FIG. 1 is a configuration diagram illustrating a schematic configuration of the printer 10 according to the first embodiment.

The printer 10 is a liquid ejection apparatus that, while conveying a recording target medium, ejects ink Q, which is an example of liquid, onto the medium to thereby record an image on the medium. The printer 10 is an example of the medium conveying apparatus and is also an example of the recording apparatus. The printer 10 in the present embodiment records an image on paper P such as plain paper, thick paper, or photographic paper, which is an example of the medium.

In the figures including FIG. 1, an X axis, a Y axis, and a Z axis intersecting one another are illustrated. Typically, the X axis, the Y axis, and the Z axis are orthogonal to one another. A ±X direction parallel to the X axis is parallel to an installation surface of the printer 10 and corresponds to the left-right direction of the printer 10. A ±Y direction parallel to the Y axis is parallel to the installation surface of the printer 10 and corresponds to the front-rear direction of the printer 10. A ±Z direction parallel to the Z axis is perpendicular to the installation surface of the printer 10 and corresponds to the up-down direction of the printer 10. In the figures, a ±X direction is the left direction when facing the front surface of the printer 10, a ±Y direction is a direction from the front surface to the back surface of the printer 10, and a ±Z direction is the upward direction, that is, the vertically upward direction. Note that the ±Y direction also corresponds to the width direction of the paper P in the printer 10, that is, the medium width direction. In the printer 10, the paper P is conveyed in a direction intersecting the medium width direction. That is, the ±Y direction corresponding to the medium width direction is a direction intersecting a conveying direction of the paper P.

As illustrated in FIG. 1, the printer 10 includes a housing 12 configuring an exterior. In addition, the printer 10 includes, on the inside of the housing 12, a plurality of paper storage cassettes 13 respectively capable of storing a plurality of pieces of paper P. The paper storage cassettes 13 are disposed on the lower side of the printer 10 and is detachably attached from the front surface side of the printer 10.

In the housing 12, a paper discharge port 14 through which the paper P subjected to recording is discharged and a discharged medium placing section 15 on which the paper P discharged from the paper discharge port 14 is placed are formed above the paper storage cassette 13. Although not illustrated, an operation panel is provided on the front surface side of the printer 10. The operation panel includes display means such as a liquid crystal panel and input means for inputting various instructions and the like to the printer 10.

The printer 10 includes, on the inside of the housing 12, a recording head 16 that executes recording and a support base 17 that supports the paper P at a position facing the recording head 16. The recording head 16 ejects the ink Q onto the paper P based on print data input from an external device or the like to thereby record an image based on the print data on the paper P. The recording head 16 is an example of the recording unit.

The paper P is conveyed along a conveying path T in the housing 12. Specifically, the paper P is conveyed from the paper storage cassette 13 to the paper discharge port 14 through the recording head 16 along the conveying path T. Note that, although not partially illustrated in FIG. 1, a plurality of roller pairs are disposed halfway in the conveying path T. The roller pairs include drive rollers that rotate by being driven by a drive source such as a not-illustrated motor and driven rollers that rotate following the rotation of the drive roller. The paper P is conveyed along the conveying path T while being nipped by the roller pairs.

The paper P stored in the paper storage cassette 13 is conveyed in the −X direction by a pick roller 18 and a roller pair 19 and thereafter is conveyed in the +Z direction along the inner surface of a side wall 20 on the −X side of the housing 12. Thereafter, a route of the paper P is changed in the +X direction. Recording is performed on the paper P by the recording head 16 halfway in being conveyed in the +X direction. Then, the route of the paper P after the recording is turned approximately 180°. The paper P is discharged in the −X direction from the paper discharge port 14 toward the discharged medium placing section 15.

A reversing path T1 for reversing the paper P when recording on both sides of the paper P, that is, duplex recording is performed is coupled to the conveying path T. When the duplex recording is performed, the paper P recorded on one side is switched back from downstream of the recording head 16 and enters the reversing path T1. Then, the paper P is returned from upstream of the recording head 16 to the conveying path T in a state in which the front and rear of the paper P are reversed. Recording on the opposite surface is executed.

In addition, a paper feeding port 21 to which the paper P is supplied from the outside of the housing 12 is provided in the side wall 20 on the −X side of the housing 12. A feeding path T2 for feeding the paper P supplied from the paper feeding port 21 to the recording head 16 is coupled to the conveying path T upstream of the recording head 16. The paper feeding port 21 has a rectangular shape elongated in the ±Y direction. The length of the paper feeding port 21 is longer than the width of the paper P. The paper feeding port 21 is an example of the opening.

A supplied medium placing section 22 configured to be capable of moving up and down according to driving of a not-illustrated drive source is disposed on the −X side of the side wall 20 on the outer side of the housing 12. The supplied medium placing section 22 is a placement table on which a plurality of pieces of paper P can be placed. The paper P placed on the supplied medium placing section 22 is sent to the feeding path T2 by a paper feeding roller 23. The paper feeding roller 23 is disposed to close the paper feeding port 21 and is configured to be rotatable with an axis in the ±Y direction as a rotation axis according to driving of a not-illustrated drive source. The lower surface of the paper feeding roller 23 comes into contact with the upper surface of the paper P at the top among the plurality of pieces of paper P placed on the supplied medium placing section 22. Then, the paper feeding roller 23 conveys the paper P at the top in the +X direction through the paper feeding port 21 with its own rotation and sends the paper P to the feeding path T2. Note that, when the number of pieces of paper P on the supplied medium placing section 22 decreases, the supplied medium placing section 22 rises such that the paper feeding roller 23 and the paper P at the top come into contact with each other.

The printer 10 includes a control unit 24. The control unit 24 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and a storage, which are not illustrated. The control unit 24 controls operations such as conveyance of the paper P, recording by the recording head 16, and raising and lowering of the supplied medium placing section 22.

FIG. 2 is an enlarged view illustrating the vicinity of the paper feeding port 21 of the printer 10 according to the first embodiment. FIG. 3 is a view of the paper feeding roller 23 according to the first embodiment viewed from the −X side. Note that, in FIG. 3, the paper feeding port 21 is indicated by an alternate long and two short dashes line.

As illustrated in FIG. 2, on the inside of the housing 12, a pair of conveyance guide plates 25 is disposed downstream in the conveying direction of the paper feeding port 21, that is, on the +X side. A roller pair 26 is disposed downstream of the conveyance guide plates 25. The pair of conveyance guide plates 25 is disposed on the upper side and the lower side of a path on which the paper P is conveyed by the paper feeding roller 23 and guide the paper P on both the upper and lower sides of the paper P such that the conveyed paper P is nipped by the roller pair 26. Both of the pair of conveyance guide plates 25 are long in the ±Y direction. The length of the pair of conveyance guide plates 25 is larger than the width of the paper P. The roller pair 26 sends the paper P conveyed by the paper feeding roller 23 to the feeding path T2.

The paper feeding roller 23 is a cylindrical roller and is attached to a drive shaft 27 extending in the ±Y direction. More specifically, the paper feeding roller 23 is fixed to the drive shaft 27. The drive shaft 27 is driven by a not-illustrated drive source to rotate clockwise when viewed from the −Y side. The paper feeding roller 23 fixed to the drive shaft 27 also rotates clockwise together with the drive shaft 27. Consequently, the paper P at the top in contact with the paper feeding roller 23 is conveyed in the +X direction. The paper feeding roller 23 is an example of the conveying roller. The drive shaft 27 is an example of the rotating shaft.

As illustrated in FIG. 3, the paper feeding roller 23 is disposed substantially at the center of the drive shaft 27 in the ±Y direction. Elastic rollers 28 are attached to the drive shaft 27 on both of the ±Y side and the −Y side of the paper feeding roller 23. That is, the paper feeding roller 23 is disposed between two elastic rollers 28 in the ±Y direction. The elastic rollers 28 are cylindrical rollers long in the ±Y direction and are configured by an elastic member having conductivity and elastically deformable by a relatively small force. As the material of the elastic rollers 28, for example, conductive sponge made by foam-molding synthetic resin such as polyurethane or polyethylene in which a conductive material such as carbon is kneaded can be used. Since the elastic rollers 28 have conductivity, the elastic rollers 28 can remove at least a part of electric charges charged in the paper P by coming into contact with the paper P conveyed by the paper feeding roller 23. The elastic rollers 28 are fixed to the drive shaft 27 and rotate together with the paper feeding roller 23.

The elastic rollers 28 are formed long to cover a space S between the pair of conveyance guide plates 25. The elastic rollers 28 are disposed to close most of the paper feeding port 21 in conjunction with the paper feeding roller 23. For this reason, the elastic rollers 28 prevent sound occurring on the inside of the housing 12 from leaking to the outside of the housing 12 through the paper feeding port 21. The elastic rollers 28 are an example of the soundproof member. Of the two elastic rollers 28, the elastic roller 28 on the ±Y side is an example of the first soundproof member and the elastic roller 28 on the −Y side is an example of the second soundproof member.

The diameter of the elastic rollers 28 are slightly larger than the diameter of the paper feeding roller 23. For this reason, when the paper feeding roller 23 comes into contact with the paper P on the supplied medium placing section 22, the elastic rollers 28 are slightly deformed such that the lower side is crushed. By setting the diameter of the elastic rollers 28 larger than the diameter of the paper feeding roller 23 as explained above, since the elastic rollers 28 securely come into contact with the paper P, electric charges of the paper P is easily removed. In addition, by setting the diameter of the elastic rollers 28 larger than the diameter of the paper feeding roller 23, since no gap is present between the elastic rollers 28 and the paper P, a soundproof effect by the elastic rollers 28 can be increased. The electric charges removed from the paper P are discharged into the air from the elastic rollers 28. However, a grounded conductive member may be brought into contact with the surface of the elastic rollers 28.

Note that the elastic rollers 28 are not limited to be fixed to the drive shaft 27 and may be attached to the drive shaft 27 to be capable of idling. In this case, the elastic rollers 28 may be attached to the outer surface of a tubular member having an inner diameter larger than the diameter of the drive shaft 27 and may be attached to the drive shaft 27 by inserting the drive shaft 27 into the tubular member. Alternatively, the elastic rollers 28 may be attached to the drive shaft 27 via a bearing. When the elastic rollers 28 are configured to be capable of idling, it is easy to remove the paper P when a jam or the like of the paper P occurs in the paper feeding port 21.

As explained above, with the printer 10 in the present embodiment, the following effects can be obtained.

With the printer 10 of the present embodiment, the elastic rollers 28 close most of the paper feeding port 21 to thereby reduce the noise leaking from the paper feeding port 21 and come into contact with the paper P to remove electric charges of the paper P. For this reason, it is possible to suppress a conveyance failure due to electric charges of the paper P supplied from the paper feeding port 21 without separately providing an electricity removing device in the vicinity of the paper feeding port 21.

In addition, according to the printer 10 of the present embodiment, since the diameter of the elastic rollers 28 is larger than the diameter of the paper feeding roller 23, the elastic rollers 28 are crushed when the paper P is conveyed by the paper feeding roller 23. For this reason, the elastic rollers 28 and the paper P adhere to each other. It is possible to efficiently remove the electric charges of the paper P. Further, since no gap is present between the elastic rollers 28 and the paper P, it is possible to effectively reduce noise.

With the printer 10 of the present embodiment, since the elastic rollers 28 are disposed on both the sides in the ±Y direction of the paper feeding roller 23, it is possible to more effectively reduce noise.

With the printer 10 of the present embodiment, the elastic rollers 28 are formed long to cover the space S between the pair of conveyance guide plates 25 long in the ±Y direction. For this reason, it is possible to effectively reduce noise leaking to the outside through the space S and noise that can occur when the conveyance guide plates 25 themselves vibrates.

2. Second Embodiment

The printer 10 according to a second embodiment is explained below with reference to the drawings.

The printer 10 according to the second embodiment is different from the printer 10 according to the first embodiment in that the printer 10 according to the second embodiment includes, instead of the elastic rollers 28, soundproof sheet members 30 explained below. The soundproof sheet members 30 are an example of the soundproof member.

FIG. 4 is an enlarged view illustrating the vicinity of the paper feeding port 21 of the printer 10 according to the second embodiment. FIG. 5 is a perspective view illustrating the soundproof sheet members 30 according to the second embodiment.

As illustrated in FIGS. 4 and 5, the soundproof sheet members 30 are disposed on the ±Y side and the −Y side of the paper feeding roller 23 and include conductive sheets 31 having conductivity and support members 32. The conductive sheets 31 are sheet-shaped members having conductivity and flexibility and can be configured by, for example, electricity removing cloth obtained by impregnating nonwoven fabric with conductive polymer. The conductive sheets 31 are formed in a rectangular shape and attached to the outer surfaces of the support members 32. The conductive sheets 31 are an example of the first member.

The support members 32 are cylindrical and have an inner diameter larger than the diameter of the drive shaft 27. The soundproof sheet members 30 are rotatably attached to the drive shaft 27 by inserting the drive shaft 27 through the support members 32. That is, the soundproof sheet members 30 are provided to be capable of idling with respect to the drive shaft 27. The outer diameter of the support members 32 is smaller than the diameter of the paper feeding roller 23. The paper P conveyed by the paper feeding roller 23 and the support members 32 do not adhere to each other. For this reason, even when the drive shaft 27 rotates and the paper P is conveyed by the paper feeding roller 23, the support members 32 do not rotate following the conveyance of the paper P and the soundproof sheet members 30 do not greatly change the posture. Note that the support members 32 may be fixed to the housing 12 or the like in a state in which the support members 32 are attached to the drive shaft 27.

The conductive sheets 31 are attached to hang down from upper portions of the support members 32 along curved surfaces on the −X side. In a state in which the paper P on the supplied medium placing section 22 is in contact with the paper feeding roller 23, parts on the lower side of the conductive sheets 31 come into contact with the paper P on the outer side of the housing 12 and extend in the −X direction along the upper surface of the paper P. Electric charges charged in the paper P are removed when the paper P comes into contact with the conductive sheets 31. Note that the conductive sheets 31 may be coupled to a grounded conductive member.

In the present embodiment as well, the soundproof sheet members 30 are disposed to close most of the paper feeding port 21 in conjunction with the paper feeding roller 23. For this reason, the soundproof sheet members 30 prevent noise or the like occurring on the inside of the housing 12 from leaking to the outside of the housing 12 through the paper feeding port 21.

Note that, as illustrated in FIG. 6, the conductive sheet 31 may be attached to hang down from an upper portion of the support member 32 along a curved surface on the +X side. In this case, a part on the lower side of the conductive sheet 31 comes into contact with the paper P on the inner side of the housing 12.

As explained above, with the printer 10 in the present embodiment, the following effects can be obtained.

With the printer 10 of the present embodiment, the soundproof sheet members 30 close most of the paper feeding port 21 to thereby reduce noise leaking from the paper feeding port 21 and come into contact with the paper P to remove electric charges of the paper P. For this reason, it is possible to suppress a conveyance failure due to electric charges of the paper P supplied from the paper feeding port 21 without separately providing an electricity removing device in the vicinity of the paper feeding port 21.

3. Modification

The embodiments explained above may be modified as follows.

In the first embodiment explained above, the paper feeding roller 23 is disposed at the center in the ±Y direction of the drive shaft 27 and the elastic rollers 28 are disposed on the ±Y side and the −Y side of the paper feeding roller 23. However, disposition of the paper feeding roller 23 and the elastic rollers 28 is not limited thereto. For example, as illustrated in FIG. 7, two paper feeding rollers 23 may be disposed on both the sides of the drive shaft 27 in the ±Y direction and the elastic roller 28 may be disposed between the two paper feeding rollers 23 in the ±Y direction. With this configuration, since the elastic roller 28 is disposed between the two paper feeding rollers 23, it is possible to more effectively reduce noise. Further, by conveying the paper P with the plurality of paper feeding rollers 23, it is possible to reduce skew of the paper P, that is, oblique conveyance of the paper P. In this case, of the two paper feeding rollers 23, the paper feeding roller 23 on the ±Y side is an example of the first conveying roller and the paper feeding roller 23 on the −Y side is an example of the second conveying roller. As illustrated in FIG. 8, three paper feeding rollers 23 may be disposed on both the sides and at the center in the ±Y direction of the drive shaft 27 and the elastic rollers 28 may be disposed among the paper feeding rollers 23. Note that the paper feeding rollers 23 and the soundproof sheet members 30 in the second embodiment can also be disposed in the same manner as illustrated in FIGS. 7 and 8.

In the embodiments explained above, the supplied medium placing section 22 configured to be capable of moving up and down is disposed outside the paper feeding port 21. However, the supplied medium placing section 22 is not limited to be capable of moving up and down. For example, as illustrated in FIG. 9, the supplied medium placing section 22 may be formed in a tray shape that is incapable of moving up and down and is capable of being extended and retracted. A user may be capable of manually placing one or a plurality of pieces of paper P on the supplied medium placing section 22. In addition, in this configuration, when paper feeding from the paper feeding port 21 is not performed, as indicated by a broken line in FIG. 9, the supplied medium placing section 22 may be capable of closing the paper feeding port 21 by being folded up. However, when the user manually places the paper P, in the configuration illustrated in FIG. 4 in the second embodiment, it is necessary to insert the paper P under the conductive sheet 31. Therefore, as illustrated in FIG. 6, it is preferable that the conductive sheet 31 is hung down to the +X side.

In the embodiments explained above, a mode in which noise is suppressed and electricity is removed in the paper feeding port 21 to which the paper P is supplied from the outside of the housing 12 is explained. However, the present disclosure is not limited to this mode. For example, the same configuration may be provided in the paper discharge port 14 from which the paper P after the recording is discharged to the outside of the housing 12. Specifically, a paper discharge roller that conveys the paper P to the outside of the housing 12 through the paper discharge port 14 may be provided in the vicinity of the paper discharge port 14. A soundproof member such as the elastic roller 28 or the soundproof sheet member 30 may be attached to a rotating shaft of the paper discharge roller. In this case, the paper discharge port 14 is an example of the opening and the paper discharge roller is an example of the conveying roller. With this configuration, it is possible to reduce noise leaking from the paper discharge port 14. Therefore, it is possible to reduce noise heard by a user waiting for discharge of the paper P in the vicinity of the paper discharge port 14. It is possible to discharge the paper P after the recording in a state in which electricity is removed.

In the second embodiment explained above, a sheet-shaped member 33 (see FIG. 10) having flexibility may be stuck to one surface or both surfaces of the conductive sheet 31. In FIG. 10, the sheet-shaped member 33 is indicated by a broken line. The sheet-shaped member 33 does not need to have conductivity if the sheet-shaped member 33 is stuck not to hinder contact of the conductive sheet 31 and the paper P. The sheet-shaped member 33 is suitably, for example, a sheet-shaped sponge member but may be a member made of another material such as cloth or felt. With this configuration, since the paper feeding port 21 is closed by a plurality of members stuck to one other, it is possible to more effectively reduce noise. The sheet-shaped member 33 is an example of the second member.

In the embodiments explained above, the printer 10 may be an apparatus that discharges liquid other than the ink Q. The printer 10 is not limited to a liquid discharge apparatus that discharges liquid. For example, the printer 10 may be a recording apparatus of a thermal type, a dot impact type, or a laser type.

In the embodiments explained above, the printer 10 that is the recording apparatus is explained as an example. However, the medium conveying apparatus is not limited to the printer 10. That is, the medium conveying apparatus only has to include the housing 12, the paper feeding roller 23, the drive shaft 27, and the soundproof members such as the elastic roller 28 and the soundproof sheet members 30 and may not include the recording head 16. The medium conveying apparatus may include a post-processing unit that performs post-processing on a medium. That is, the medium conveying apparatus may be a post-processing apparatus including the post-processing unit. Examples of the post-processing include punching processing of punching a hole in a medium and end-binding processing of aligning a plurality of media and binding end portions of the media.

Claims

1. A medium conveying apparatus comprising: a housing in which an opening is provided;a conveying roller configured to convey a medium through the opening;a rotating shaft to which the conveying roller is attached, the rotating shaft extending in a medium width direction intersecting a conveying direction of the medium; anda soundproof member attached to the rotating shaft and configured to prevent sound occurring on an inside of the housing from leaking to an outside of the housing through the opening, whereinthe soundproof member comes into contact with the medium conveyed by the conveying roller and removes electric charges of the medium.

2. The medium conveying apparatus according to claim 1, wherein the soundproof member is an elastic roller having conductivity.

3. The medium conveying apparatus according to claim 2, wherein a diameter of the elastic roller is larger than a diameter of the conveying roller.

4. The medium conveying apparatus according to claim 1, wherein the soundproof member includes a sheet-shaped first member having conductivity.

5. The medium conveying apparatus according to claim 4, wherein a sheet-shaped second member is stuck to the first member.

6. The medium conveying apparatus according to claim 1, wherein the soundproof member includes a first soundproof member and a second soundproof member, andthe conveying roller is disposed between the first soundproof member and the second soundproof member in the medium width direction.

7. The medium conveying apparatus according to claim 1, wherein the conveying roller includes a first conveying roller and a second conveying roller, andthe soundproof member is disposed between the first conveying roller and the second conveying roller in the medium width direction.

8. The medium conveying apparatus according to claim 1, wherein the soundproof member is attached to the rotating shaft to be configured to idle.

9. The medium conveying apparatus according to claim 1, further comprising a pair of conveyance guide plates disposed downstream of the opening in the conveying direction and configured to guide the medium on both upper and lower sides of the medium, wherein the soundproof member is formed long to cover a space between the pair of conveyance guide plates.

10. The medium conveying apparatus according to claim 1, wherein the opening is a paper feeding port to which the medium is supplied.

11. The medium conveying apparatus according to claim 1, wherein the opening is a paper discharge port from which the medium is ejected.

12. A recording apparatus comprising: a housing in which an opening is provided;a conveying roller configured to convey a medium through the opening;a rotating shaft to which the conveying roller is attached, the rotating shaft extending in a medium width direction intersecting a conveying direction of the medium; anda soundproof member attached to the rotating shaft and configured to prevent sound occurring on an inside of the housing from leaking to an outside of the housing through the opening; anda recording unit configured to perform recording on the medium, whereinthe soundproof member comes into contact with the medium conveyed by the conveying roller and removes electric charges of the medium.

13. A post-processing apparatus comprising: a housing in which an opening is provided;a conveying roller configured to convey a medium through the opening;a rotating shaft to which the conveying roller is attached, the rotating shaft extending in a medium width direction intersecting a conveying direction of the medium; anda soundproof member attached to the rotating shaft and configured to prevent sound occurring on an inside of the housing from leaking to an outside of the housing through the opening; anda post-processing unit configured to perform post-processing on the medium, whereinthe soundproof member comes into contact with the medium conveyed by the conveying roller and removes electric charges of the medium.