The entire disclosure of Japanese Patent Application No. 2016-226676, filed Nov. 22, 2016 is expressly incorporated by reference herein.
The present disclosure relates to a recording apparatus for performing recording onto a transported medium.
A recording apparatus, of which an ink jet printer is a representative example, is equipped with a transport path for transporting a sheet of recording paper, which serves as a medium, and an inversion path provided in the transport path for inverting the sheet. Thus, such a recording apparatuses can perform recording on both sides of the sheet.
In such a recording apparatus, noises are generated in the apparatus body by operating a driving system that includes medium transport devices, etc., and a driving source for the driving system. A transported medium also generates a rustling sound or noise when the medium rubs against guide surfaces of the transport path. Thus, a recording apparatus may include a sound absorber provided near the transport path so as to absorb the sound and reduce the noise level (see, for example, JP-A-10-7288, JP-A-2009-83957, and JP-A-2009-40565).
In JP-A-10-7288, JP-A-2009-83957, and JP-A-2009-40565, a configuration is disclosed in which the sound absorber is provided along the transport path, and path parts constituting the transport path have openings for improving the sound absorption effect of the sound absorber. However, in the known configuration disclosed in JP-A-10-7288, JP-A-2009-83957, and JP-A-2009-40565, the path parts having openings are disposed at positions closer to the outside of the apparatus body with respect to the transport path. Thus, the sound passing through the openings may escape from the apparatus body. There has been a case in which due to the provision of the openings, an increase in the volume of the sound escaping from the openings is considered a trade-off for further improvement in the sound absorption effect of the sound absorber.
An advantage of some aspects of the disclosure is that the escape of sounds generated inside a recording apparatus from the apparatus body is suppressed or reduced.
A recording apparatus according to an aspect of the disclosure includes an apparatus body having a recording device that performs recording onto a medium; a unit body that is accommodated inside the apparatus body and has a path-forming surface formed at least on a portion of a periphery of the unit body, the path-forming surface forming a medium transport path; and a sound absorber disposed inside the unit body. In addition, the unit body further includes a plurality of openings that are in communication with the sound absorber inside the unit body, and the plurality of the openings are provided at least on a portion of the path-forming surface.
According to this configuration, a unit body is accommodated inside the apparatus body and has a path-forming surface formed at least on a portion of a periphery of the unit body, and the path-forming surface forms a medium transport path. The unit body in which a sound absorber is disposed further includes a plurality of openings that are in communication with the sound absorber inside the unit body, and the plurality of the openings are provided at least on a portion of the path-forming surface. Thus, the recording apparatus can be formed such that the sound absorber provided inside the unit body absorbs sound generated around the unit body and the sound does not easily escape from the apparatus body.
It is preferable that in the recording apparatus, the sound absorber be disposed at a position inside the unit body corresponding to positions at which the openings are formed.
According to this configuration, the sound absorber is disposed at a position inside the unit body corresponding to positions at which the openings are formed. As a result, the sound absorption effect of the sound absorber can be obtained efficiently.
It is preferable that in the recording apparatus, the openings be covered with the sound absorber from inside the unit body.
According to this configuration, the openings are covered with the sound absorber from inside the unit body. As a result, the sound absorption effect of the sound absorber can be obtained more efficiently.
It is preferable in the recording apparatus that the path-forming surface include a first path-forming surface that forms a feed path on which the medium is transported from a setting device at which the medium is set toward a recording region of the recording device; and a second path-forming surface that forms a switchback path on which, when the medium onto which the recording device has performed recording is inverted, the medium is switched back from the recording region and transported into the feed path. In addition, it is also preferable that the openings be disposed at least on the first path-forming surface.
When a medium is transported on the medium transport path, the medium comes into contact with the medium transport path, which may generate sound (hereinafter referred to as a “rustling sound”). Such a rustling sound tends to occur when a dry medium before recording is transported. According to this configuration, the openings are disposed at least on the first path-forming surface that forms a feed path on which the medium is transported from a setting device at which the medium is set toward a recording region of the recording device. Thus, the rustling sound on the feed path can be reduced. In particular, the rustling sound generated when the medium before recording is transported can be effectively reduced.
It is preferable that in the recording apparatus, the apparatus body include an insertion device, which is different from the setting device, being capable of inserting the medium into a path region on the first path-forming surface on the feed path, and that the openings be at least disposed at positions near the insertion device on the first path-forming surface.
In the apparatus body, the sound inside the apparatus body tends to escape from the insertion device. According to this configuration, the openings are at least disposed at positions near the insertion device on the first path-forming surface. This can effectively reduce the sound escaping from the insertion device.
It is preferable that in the recording apparatus, the sound absorber be disposed on a back side of the second path-forming surface.
According to this configuration, the sound absorber is disposed on the back side of the second path-forming surface. Thus, the rustling sound of the medium can be reduced when the medium is transported on the feed path or on the switchback path.
It is preferable that in the recording apparatus, the openings are disposed on both the first path-forming surface and the second path-forming surface.
According to this configuration, the openings are disposed on both the first path-forming surface and the second path-forming surface. Thus, the rustling sound of the medium can be effectively reduced on both the feed path and the switchback path.
It is preferable that the recording apparatus further include transport devices that are provided in the medium transport path and that transport the medium; that at least one of the transport devices be formed so as to have an apparatus-side transport roller disposed at a position facing the unit body within the apparatus body and to have a unit body-side transport roller disposed in the unit body; that the unit body have a bearing therein that supports a rotating shaft of the unit body-side transport roller; and that the openings be disposed at positions away from a position at which the bearing is disposed in a direction in which the rotating shaft extends.
When the rotating shaft of the unit body-side transport roller rotates, the bearing may produce sliding sound in conjunction with the rotation of the rotation shaft. According to this configuration, in the unit body, the openings are disposed at positions away from a position at which the bearing is disposed in a direction in which the rotating shaft extends. In other words, the openings are not provided at the positions that correspond to the position of the bearing on the path-forming surface. This reduces the likelihood of the sliding sound of the bearing escaping from the unit body and enables the sound absorber provided inside the unit body to absorb the sliding sound.
It is preferable that in the recording apparatus, the unit body-side transport roller be exposed on both the feed path and the switchback path.
According to this configuration, the unit body-side transport roller can be utilized as a common transport device for the feed path and the switchback path, which can reduce the number of parts.
It is preferable in the recording apparatus that the unit body be capable of being attached to, and detached from, the apparatus body; that the apparatus body include an opening/closing body that opens/closes an accommodation space in which the unit body is accommodated, the opening/closing body having a path-forming wall and forming, in a closed state of the opening/closing body, a portion of the feed path on the path-forming wall and a portion of an exterior of the apparatus body; that the apparatus body further include an opening/closing-body sound absorber disposed on a back side of the path-forming wall; and that the path-forming wall be formed so as to have a continuous surface without openings.
In the description of this configuration, the “openings” mean apertures provided for the purpose of improving the sound absorption effect of the opening/closing-body sound absorber, in other words, apertures for the same noise reduction purpose as for the openings provided in the unit body. Thus, the openings do not include apertures for purposes other than the noise reduction, such as screw holes. According to this configuration, the opening/closing-body sound absorber absorbs the sound generated inside the apparatus body and further reduces the sound escaping from the apparatus body. In this case, the path-forming wall is formed so as to have a continuous surface, which reduces the likelihood of the sound generated inside the apparatus body escaping therefrom.
The disclosure will be described with reference to the accompanying drawings, wherein like numbers reference like elements.
A recording apparatus according to one embodiment of the disclosure will be outlined first. In the present embodiment, an ink jet printer 1 (hereinafter simply referred to as a “printer 1”) will be described as an example of the recording apparatus.
Note that in the X-Y-Z coordinate system indicated in each drawing, the X-axis direction represents the width direction of the recording apparatus and the moving direction of the recording head, the Y-axis direction represents the depth direction of the recording apparatus, and the Z-axis direction represents the height direction of the recording apparatus. Also note that in each drawing, the +X direction is the direction toward the left of the apparatus and the −X direction is the direction toward the right of the apparatus. The +Y direction is the direction toward the front of the apparatus and the −Y direction is the direction toward the rear of the apparatus. The +Z direction is the direction toward the top of the apparatus and the −Z direction is the direction toward the bottom of the apparatus. The direction in which sheets of paper are transported in the printer is referred to as “downstream” and the opposite direction is referred to as “upstream”.
Overall Structure of Printer
The overall structure of a printer 1 will be outlined with reference mainly to
Inside the apparatus body 2, the recording head 7 is mounted in a carriage 8 that is formed so as to be able to move in the X-axis direction in
Sheet Transport Path of Printer.
Next, a transport path P for sheets (medium transport path) in the printer 1 will be described with reference mainly to
Feed Path
The sheet cassette 6 (see also in
The apparatus body 2 has a rear-side cover 11 (
The unit body 20 (
The unit body 20 is detachably mounted in the apparatus body 2. The unit body 20 (
In the unit body 20, as illustrated in
In the embodiment, the transport driving rollers 21a and 21b of the unit body 20 are each rotationally driven in the clockwise direction in
The feed path Q is formed in a curved manner such as to follow the shape of the roller surface of the transport driving roller 21a of the unit body 20. A sheet that has been transported from the sheet cassette 6 toward the rear side of the apparatus (−Y direction) is thereby transported toward the front side of the apparatus (+Y direction) by the transport driving roller 21a.
A transport roller pair 15 is disposed on the upstream side (i.e., the side near the rear side of the apparatus or the side in the −Y direction) of the recording head 7. The sheet is subsequently transported to below the recording head 7 by the transport roller pair 15. The sheet transported toward the front side of the apparatus passes under the recording head 7 while being supported by a support member 16 that is disposed opposing the recording head 7. The recording head 7 ejects ink onto the sheet to perform recording. Discharge roller pairs 17a and 17b, which serve as discharge devices, are disposed on the downstream side (i.e., the side near the front side of the apparatus or the side in the +Y direction) of the recording head 7. The sheet on which recording has been performed is discharged by the discharge roller pairs 17a and 17b into a discharge tray 5 disposed on the front side of the apparatus.
Switchback Path
Next, the switchback path R will be described with reference to
In the switchback path R (see
The sheet transported from the recording region K on the switchback path R in the reverse direction enters the feed path Q at the first junction point M. The sheet is transported again to the recording region K, in which the recording head 7 performs recording on the second side (back side). After recording is completed, the sheet is nipped by the discharge roller pairs 17a and 17b and discharged into the discharge tray 5.
In the unit body 20, the transport driving roller 21b is formed so as to nip the sheet with the transport idler roller 18e, which serves as an apparatus-side transport roller. The transport idler roller 18e is disposed at a position in the apparatus body 2 opposing the second path-forming surface 27 (
The transport driving rollers 21a and 21b, which are exposed on both the first path-forming surface 26 and the second path-forming surface 27, contribute to sheet transport on both the feed path Q and the switchback path R. As a result, the number of parts can be reduced, which leads to the size reduction of the unit body 20 and thus to the size reduction of the printer 1. Note that in the embodiment, one transport idler roller 18e is provided for the transport driving roller 21b on the switchback path R. However, the number of the transport idler rollers 18e is not limited to one but may be two or more. Also note that in the embodiment, no transport idler roller, which serves as the apparatus-side transport roller, is provided for the transport driving roller 21a at a position in the apparatus body 2 opposing the second path-forming surface 27. However, it is possible to provide a transport idler roller for the transport driving roller 21a.
Sheet Transport from Manual Feeder Tray
The printer 1 is formed such that a manual feeder tray 31 (
The topmost sheet of the sheets set into the manual feeder tray 31 from the sheet setting opening 30 is picked up by a second feed roller 19 and sent downstream, along a path indicated by the dash-dot-dot line S in
Unit Body
Next, the structure of the above unit body 20 will be further described with reference to the
The unit body 20 is constituted by a unit-body upper member 42 illustrated in
As illustrated in
The unit body 20 is surrounded by transport paths P (the feed path Q and the switchback path R) as illustrated in
In particular, as illustrated in
All of the through holes 29 are not necessarily covered with the first sound absorbers 40a. However, even in the case that the through holes 29 are not covered with the first sound absorbers 40a, it is preferable that the first sound absorbers 40a be disposed at positions corresponding to the positions at which the through holes 29 are formed. For example, the first sound absorbers 40a may be provided at a distance from the through holes 29, in other words, at positions that can be seen through the through holes 29 from outside the unit body 20.
It is preferable that as in the embodiment, the through holes 29 provided in the unit body 20 be disposed at least on the first path-forming surface 26. When a sheet is transported on the transport path P such as the feed path Q or the switchback path R, the transported sheet rubs against structures of each path and may make a rustling sound. Such a rustling sound tends to occur during transport of a dry sheet before recording.
Thus, by providing the through holes 29 on the first path-forming surface 26 that forms the feed path Q on which dry sheets before recording can be transported, the rustling sound that tends to occur on the feed path Q can be efficiently reduced.
Moreover, the unit body 20 has the first sound absorbers 40a disposed on the interior wall 44 that is the back side of the first path-forming surface 26, which serves as the feed path Q. The unit body 20 also has the second sound absorbers 40b disposed on the interior wall 45 that is the back side of the second path-forming surface 27, which serves as the switchback path R. As a result, the rustling sound of the sheet can be reduced when the sheet is transported on the feed path Q or on the switchback path R. Note that in the embodiment, the second sound absorbers 40b extend in the X-axis direction along the rotating shaft 41a of the transport driving roller 21a and along the rotating shaft 41b of the transport driving roller 21b (
In addition, in the unit body 20 according to the embodiment, the through holes 29 are disposed mainly in a region in the −Y direction of the first path-forming surface 26 (
As in the embodiment, the through holes 29 on the first path-forming surface 26 in the unit body 20 are provided at least at positions near the sheet setting opening 30. This can efficiently reduce the sound escaping from the sheet setting opening 30 when a sheet is fed from the manual feeder tray 31.
Note that in the unit body 20 according to the embodiment, the through holes 29 are provided only on the first path-forming surface 26 but the through holes 29 may be provided also for the second path-forming surface 27. Providing the through holes 29 on the second path-forming surface 27 that forms the switchback path R can reduce the rustling sound generated by the sheet transported on the switchback path R.
The bearings 46 that support the rotating shaft 41a of the transport driving roller 21a and the bearings 47 that support the rotating shaft 41b of the transport driving roller 21b are disposed in the unit-body lower member 43 as is previously described, and the bearings 46 and 47 are located inside the unit body 20. In the unit body 20, the through holes 29 are disposed at positions away from the positions that correspond to the bearings 46 and 47 on the first and second path-forming surface 26 and 27. As illustrated in
The bearings 46 and 47 may produce sliding sound in conjunction with the rotation of the corresponding rotating shafts 41a and 41b. Eliminating the through holes 29 from the positions that correspond to the bearings 46 and 47 on the first path-forming surface 26 reduces the likelihood of the sliding sound of the bearings 46 and 47 escaping from the unit body 20 and enables the sound absorbers 40 provided inside the unit body 20 to absorb the sliding sound.
The unit body 20 (more specifically, the unit-body lower member 43) illustrated in
Other Mechanism of Unit Body
Next, a power transmission mechanism 50 will be described. The power transmission mechanism 50 transmits power from the driving source (not shown) disposed in the apparatus body 2 to the transport driving rollers 21a and 21b. As illustrated in
The driving gear 51 is connected to the transport driving roller 21a via the rotating shaft 41a, and the driving gear 53 is connected to the transport driving roller 21b via the rotating shaft 41b. The intermediate gear 52 are disposed between the driving gear 51 and the driving gear 53 in such a manner that the rotation of one of the driving gears (for example, the driving gear 53) causes the other gear (the driving gear 51) to rotate. In the embodiment, the driving source (not shown) provides the driving gear 53 with a driving force, which cause the driving gear 53 to rotate clockwise in
Other Sound Absorbers Provided in Printer
The housing of the printer 1, which is the apparatus body 2, stands in the Z-axis direction that intersects the medium transport direction (the Y-axis direction). In this orientation, the exterior of the apparatus body 2 is constituted by an apparatus front side 34 (
An opening/closing-body sound absorber 55 (
Providing the path-forming wall 56 with openings causes the opening/closing-body sound absorber 55 to obtain a sound absorption effect more easily but at the same time, tends to cause the internal sound to escape from the apparatus body 2 through the through holes because the opening/closing-body sound absorber 55 is disposed in the apparatus body 2 at a position close to the outside. In the embodiment, the path-forming wall 56 has a continuous surface without openings. This enables the opening/closing-body sound absorber 55 to absorb the sound generated inside the apparatus body 2 while reducing the sound escaping from the apparatus body 2. Note that the “openings” that are not provided on the path-forming wall 56 mean apertures for the purpose of improving the sound absorption effect of the opening/closing-body sound absorber 55. Thus, apertures for other purposes (for example, screw holes, etc.) can be provided on path-forming wall 56.
In addition, a front-side cover 10 (
A front-side sound absorber 57 is disposed along the inside of the front-side cover 10. The front-side cover 10 is formed hollow, and the front-side sound absorber 57 is disposed inside the front-side cover 10. As illustrated in
Note that the sound absorbers described above can be formed of a material having sound absorbing properties, such as, for example, polyurethane foam, sponges, nonwoven fabric, glass wool, synthetic fiber, or natural wool.
Note that the disclosure is not limited to the embodiment described above and various modifications can be made within the scope of the disclosure set forth in the claims. Thus, all such modifications are intended to be included within the scope of this disclosure.
Number | Date | Country | Kind |
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2016-226676 | Nov 2016 | JP | national |
Number | Name | Date | Kind |
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20040175210 | Otaka | Sep 2004 | A1 |
20090026691 | Ishikawa | Jan 2009 | A1 |
Number | Date | Country |
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10-007288 | Jan 1998 | JP |
2009-040565 | Feb 2009 | JP |
2009-083957 | Apr 2009 | JP |
2009-226833 | Oct 2009 | JP |
Number | Date | Country | |
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20180141355 A1 | May 2018 | US |