Patent Grant
10618315
The present invention relates to a medium support unit, a printing apparatus, and an attachment method of friction member.
In the related art, medium support units that cause a medium to be supported by a support portion are used. Among such medium support units, a medium support unit having a configuration in which a medium is fixed to a support portion (so as to immobilize a medium) by a friction member is used.
For example, JP-A-2004-291430 discloses a fabric printing apparatus (a printing apparatus provided with a medium support unit) having a configuration in which a fabric, as a medium, is fixed to a platen, as a support portion, by pasting a cotton cloth, as a friction member, onto a central region of the platen and using a frictional force of the cotton cloth.
A medium support unit such as that disclosed in JP-A-2004-291430, which has a configuration in which a medium is fixed to a support portion by a friction member, can firmly fix the medium to the support portion by the friction member. However, when a medium is set on the support portion, there are cases in which the friction member becomes caught, for example in corner portions of the support portion, due to the medium coming into contact with the friction member (in particular, an end portion of the friction member) with a strong frictional force and the friction member becomes separated.
An advantage of some aspects of the invention is that a medium is firmly fixed to a support portion by a friction member and the friction member is prevented from becoming separated during setting of the medium on the support portion.
According to an aspect of the invention, there is provided a medium support unit that supports, on a support surface, a medium on which printing is to be performed by a printing apparatus, the medium support unit is provided with a support portion that has the support surface and on which it is possible to set the medium in a setting direction that runs parallel to the support surface, and a friction member, which is a member having a higher static friction coefficient with respect to the medium than the support surface and is attached to the support portion to cover the support surface, the support portion has a corner portion at which, when viewed from the support surface side, two different sides intersect, the friction member has, at a position that corresponds to the corner portion, an incision formation portion in which three or more incisions are made, the incision formation portion that covers the corner portion positioned further on an upstream side than a center in the setting direction has a first cover portion, formed between adjacent incisions, and a second cover portion positioned further on a downstream side in the setting direction than the first cover portion and formed between adjacent incisions, and the first cover portion overlaps with the second cover portion such that an end portion of the first cover portion on the downstream side in the setting direction covers an end portion of the second cover portion on the upstream side in the setting direction.
In this case, the incision formation portion that covers the corner portion positioned further on the upstream side in the setting direction than the center is overlapped so that the end portion of the first cover portion on the downstream side in the setting direction covers the end portion of the second cover portion on the upstream side in the setting direction. That is, in a corner portion that is positioned further on the upstream side in the setting direction than the center, the end portion of a cover portion on the upstream side in the setting direction formed between incisions is covered. At the corner portion positioned further on the upstream side than the center in the setting direction, a medium is likely to come into contact with the friction member with a strong frictional force during setting of the medium in the support portion, and therefore, the end portion of the cover portion, which is formed between incisions, on the upstream side in the setting direction is particularly likely to become caught or separated due to the medium moving in the setting direction. However, as a result of adopting such a configuration, the end portion of the friction member is unlikely to become caught on a medium even if the medium is moved in the setting direction. Therefore, it is possible to firmly fix a medium to the support portion by the friction member and it is possible to prevent the friction member from becoming separated during setting of the medium in the support portion.
In this instance, rather than referring exclusively to directly causing a medium to be supported on a support surface, the term “supports on the support surface” has a meaning that includes disposing another member, or the like, on the support surface and indirectly (without coming into direct contact) supporting a medium.
In addition, the term “corner portion” has a meaning that includes arc-like corners (round corners) and portions on which chamfering has been carried out.
In the medium support unit, it is preferable that the incision formation portion that covers the corner portion positioned further on the downstream side than the center in the setting direction have a third cover portion formed between adjacent incisions, and a fourth cover portion positioned further on the downstream side in the setting direction than the third cover portion and formed between adjacent incisions, and the fourth cover portion overlap with the third cover portion such that an end portion of the fourth cover portion on the upstream side in the setting direction covers an end portion of the third cover portion on the downstream side in the setting direction.
In this case, in the incision formation portion that covers the corner portion positioned further on the downstream side than the center in the setting direction, the fourth cover portion overlaps with the third cover portion such that the end portion of the fourth cover portion on the upstream side in the setting direction covers the end portion of the third cover portion on the downstream side in the setting direction. That is, the configuration of the incision formation portion is symmetric in the setting direction with the center in the setting direction as a reference. Therefore, in a case in which the support portion is constituted having a symmetrical structure in the setting direction, or the like, regardless of the direction in which the support portion is set in the setting direction (even if the support portion is set with the upstream side and the downstream side reversed), it is possible to firmly fix a medium to the support portion by the friction member and it is possible to prevent the friction member from becoming separated during setting of the medium in the support portion.
In the medium support unit, it is preferable that the incision formation portion that covers the corner portion positioned further on the downstream side than the center in the setting direction have a third cover portion formed between adjacent incisions, and a fourth cover portion positioned further on the downstream side in the setting direction than the third cover portion and formed between adjacent incisions, and the third cover portion overlap with the fourth cover portion such that an end portion of the third cover portions on the downstream side in the setting direction covers an end portion of the fourth cover portion on the upstream side in the setting direction.
In this case, in the incision formation portion that covers the corner portion positioned further on the downstream side than the center in the setting direction, a third cover portion overlaps with the fourth cover portion such that the end portion of the third cover portion on the downstream side in the setting direction covers the end portion of the fourth cover portion on the upstream side in the setting direction. Therefore, at a corner portion positioned further on the downstream side than the center in the setting direction, it is also possible to effectively prevent the friction member from becoming separated during setting of a medium in the support portion.
In the medium support unit, it is preferable that a fixing portion that fixes the friction member in an attachable and detachable manner be provided to the support portion.
In this case, since the fixing portion that fixes the friction member in an attachable and detachable manner is provided to the support portion, it is possible to easily perform cleaning, replacement, and the like, of the friction member by attaching and detaching the friction member.
In the medium support unit, it is preferable that the fixing portion be provided on a rear surface opposite to the support surface.
In this case, since the fixing portion is provided on a rear surface on a side opposite to the support surface, it is possible to prevent a medium from becoming caught and the friction member from becoming separated at the fixing portion, in the vicinity of the fixing portion, or the like.
In the medium support unit, it is preferable that the incision formation portion be formed by making incisions in a radial manner.
In this case, since the incision formation portion is formed by making incisions in a radial manner, it is possible to suitably form a configuration in which the first cover portion overlaps with the second cover portion such that the end portion of the first cover portion on the downstream side in the setting direction covers the end portion of the second cover portion on the upstream side in the setting direction.
In the medium support unit, it is preferable that a stepped portion be formed in at least one portion of the support portion in the periphery of the support surface by making a step in the support surface in order to bear a frame portion that presses the medium, and that the friction member cover the stepped portion in such a way that an inclined surface is formed above the stepped portion.
In this case, the stepped portion for bearing a frame portion that presses the medium is formed in at least one portion of the support portion in the periphery of the support surface. Therefore, it is possible to use the frame portion that presses the medium according to necessity. In addition, the friction member covers the stepped portion so that an inclined surface is formed above the stepped portion. That is, the inclined surface is formed in the periphery of the support surface. The periphery of the support surface is an area in which the medium is likely to rise from the support portion, but it is possible to prevent rising of the medium as a result of the inclined surface being formed in the periphery of the support surface.
According to another aspect of the invention, there is provided a printing apparatus provided with the medium support unit, and a printing section that performs printing on the medium supported by the medium support unit.
In this case, it is possible to print with a medium firmly fixed to the support portion by the friction member and it is possible to prevent the friction member from becoming separated during setting of the medium in the support portion.
According to still another aspect of the invention, there is provided an attachment method of a friction member in a medium support unit that supports, on a support surface, a medium on which printing is to be performed by a printing apparatus, the medium support unit being provided with a support portion that has the support surface and on which it is possible to set the medium in a setting direction that runs parallel to the support surface, and a friction member, which is a member having a higher static friction coefficient with respect to the medium than the support surface and is attached to the support portion to cover the support surface, in which the support portion has a corner portion at which, when viewed from the support surface side, two different sides intersect, and the friction member has, at a position that corresponds to the corner portion, an incision formation portion in which three or more incisions are made, the method including, when covering the corner portion positioned further on the upstream side than the center in the setting direction by the incision formation portion of the friction member, overlapping a first cover portion formed between adjacent incisions with a second cover portion positioned further on the downstream side in the setting direction than the first cover portion and formed between adjacent incisions such that an end portion of the first cover portion on the downstream side in the setting direction covers an end portion of the second cover portion on the upstream side in the setting direction.
In this case, at the incision formation portion that covers the corner portion positioned further on the upstream side than the center in the setting direction, the first cover portion overlaps the second cover portion such that the end portion of the first cover portion on the downstream side in the setting direction covers the end portion of the second cover portion on the upstream side in the setting direction. That is, in a corner portion positioned further on the upstream side than the center in the setting direction, the end portion of a cover portion on the upstream side in the setting direction formed between incisions is covered. At the corner portion positioned further on the upstream side than the center in the setting direction, a medium is likely to come into contact with the friction member with a strong frictional force during setting of the medium in the support portion, and therefore, the end portion of the cover portion, which is formed between incisions, on the upstream side in the setting direction is particularly likely to become caught or separated due to the medium moving in the setting direction. However, as a result of the friction member being attached by using such a method, the end portion of the friction member is unlikely to become caught on a medium even if the medium is moved in the setting direction. Therefore, it is possible to firmly fix a medium to the support portion by the friction member and it is possible to prevent the friction member from becoming separated during setting of the medium in the support portion.
The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements.
Hereinafter, a printing apparatus 1 according to an embodiment of the invention will be described in detail with reference to the appended drawings.
The printing apparatus 1 is provided with the medium support unit 2. The medium support unit 2 is provided with a tray 4 as a support portion, and the tray 4 has a support surface 8 that supports a medium. Further, the medium support unit 2 moves in a movement direction A in a state in which a medium is supported by the support surface 8 of the tray 4.
In addition, the printing apparatus 1 is provided with a medium transport portion 3 that transports, in the movement direction A, a medium supported by the tray 4. The movement direction A is a direction that includes a direction A1 and a direction A2 that is a direction opposite the direction A1. Additionally, the printing apparatus 1 of the present embodiment has a configuration in which it is possible to print on a medium having cylindrical sections such as a T-shirt, and a setting direction of such a medium into the medium support unit 2 (the tray 4) corresponds to the direction A1. Therefore, hereinafter description will be given treating the setting direction of a medium as a setting direction A1.
In addition, the medium support unit 2 is mounted on a stage 5 in an attachable and detachable manner. In this instance, an attachment and detachment direction C of the medium support unit 2 to the stage 5 is a vertical direction in the printing apparatus 1 of the present embodiment. The medium support unit 2 moves together with the stage 5 in a direction (the vertical direction) that runs parallel to the attachment and detachment direction C as a result of the lever 9 being caused to rotate. Additionally, as represented by
In addition, a printing head 7, as a printing section that is capable of printing on a medium by discharging ink, as an example of a liquid, from a nozzle (not illustrated in the drawings) that is formed on a formation surface 17, is provided inside a main body of the printing apparatus 1. Further, the printing apparatus 1 of the present embodiment forms a desired image by discharging ink from the printing head 7 onto a medium supported by the tray 4 while causing the printing head 7 to reciprocate in a scanning direction B, which intersects the movement direction A, as a result of causing a carriage 6, as a holding portion that holds the printing head 7, to reciprocate in the intersecting direction B.
Additionally, in the printing apparatus 1 of the present embodiment, the front side (lower left direction) in
Next, the medium support unit 2, which is a main portion of the printing apparatus 1 of the present embodiment will be described.
In this instance,
In addition,
In addition,
As shown by
Meanwhile, in a case in which a medium that does slide readily on the support surface 8 is used, in place of using the frame portion, the printing apparatus 1 of the present embodiment can suitably print an image on the medium as a result of disposing the friction member 20 (a member having a higher static friction coefficient with respect to the medium than the support surface 8) in the tray 4. For example, it is possible to use a cloth as the friction member 20. In a case in which the support surface 8 is formed of a resin member, a cloth having a higher static friction coefficient with respect to a medium than the resin member may be used as the friction member 20. However, the member used as the friction member 20 need not necessarily be a cloth, and may be any kind of material as long as the material has a higher static friction coefficient with respect to the medium than the support surface 8.
It is possible to immobilize the medium with respect to the support surface 8 by disposing the friction member 20 in the tray 4. Additionally, in movement of a medium with respect to the support surface 8, there is a case in which a medium moves in an overall manner in one direction with respect to the support surface 8, and for example, a case in which a medium swells in an initial printing step when performing printing on the medium by using two steps and the medium moves (spreads) in all directions with respect to the support surface 8. Further, for example, when a medium swells in an initial printing step (for example, base printing using white ink) when performing printing on the medium by using two steps and the medium moves (spreads) in all directions with respect to the support surface 8, there are cases in which an image is shifted in a subsequent printing step (for example, base printing sections in white ink protrude from the image of the subsequent printing step).
As shown by
In this case, the respective dispositions during attachment (fitting) of the friction member 20 to the tray 4 are as shown in
In this instance, the folding sequence of the folded portions 13a, the folded portions 13b, and the folded portions 13c is an order of the folded portions 13c, the folded portions 13b, and the folded portions 13a. More specifically, firstly, the folded portions 13c are bent. Next, the folded portions 13b are bent so that end portions 23 of the folded portions 13b on the downstream side in the setting direction A1 cover end portions 24 of the folded portions 13c on the upstream side in the setting direction A1. Next, the folded portions 13a are bent so that end portions 21 of the folded portions 13a on the downstream side in the setting direction A1 cover end portions 22 of the folded portions 13b on the upstream side in the setting direction A1. As a result of folding in such an order, as shown in
In summary, in the medium support unit 2 of the present embodiment, the medium support unit 2 of the present embodiment is a medium support unit that supports, on the support surface 8, a medium on which printing is to be performed by the printing apparatus 1, and is provided with the tray 4 that has the support surface 8 and on which it is possible to set the medium in the setting direction A1 that runs parallel to the support surface 8, and the friction member 20, which is a member having a higher static friction coefficient with respect to the medium than the support surface 8, and is attached to the tray 4 so as to cover the support surface 8. Further, the tray 4 has the corner portions 16 at which, when viewed from the support surface 8 side (in a planar manner), two different sides intersect, and the friction member 20 has, at positions that correspond to the corner portions 16, the incision formation portions 13 and 14 in which three or more of the incisions N are made.
In this instance, if description is given using the folded portions 13b and the folded portions 13c, the incision formation portions 13 that cover the corner portions 16a positioned further on the upstream side than the center in the setting direction A1 have the folded portions 13b as the first cover portions formed between adjacent incisions N, and the folded portions 13c as the second cover portions positioned further on the downstream side in the setting direction A1 than the folded portions 13b and formed between adjacent incisions N, and the end portions 23 of the folded portions 13b on the downstream side in the setting direction A1 are overlapped so as to cover the end portions 24 of the folded portions 13c on the upstream side in the setting direction A1.
That is, in the medium support unit 2 of the present embodiment, at the corner portions 16a positioned further on the upstream side in the setting direction A1 than the center, the end portions (the end portions 24 and the end portions 22 which will be mentioned later) of the cover portions (the folded portions 13b and the folded portions 13c), which are formed between incisions, on the upstream side in the setting direction A1 are covered. At the corner portions 16a positioned further on the upstream side than the center in the setting direction A1, a medium is likely to come into contact with the friction member 20 with a strong frictional force during setting of the medium in the tray 4, and therefore, the end portions of the cover portions, which are formed between incisions, on the upstream side in the setting direction A1 are particularly likely to become caught or separated due to the medium moving in the setting direction A1. However, as a result of adopting such a configuration, the end portions of the friction member 20 are unlikely to become caught on a medium even if the medium is moved in the setting direction A1. Therefore, the medium support unit 2 of the present embodiment has a configuration in which it is possible to firmly fix a medium to the tray 4 by the friction member 20 and it is possible to prevent the friction member 20 from becoming separated during setting of the medium in the tray 4.
In this instance, rather than referring exclusively to directly causing a medium to be supported on the support surface 8, the term “supports on the support surface 8” has a meaning that includes disposing another member, or the like, (the friction member 20, or the like) on the support surface 8 and indirectly (without coming into direct contact) supporting a medium. The support surface 8 of the present embodiment indirectly supports a medium via at least the friction member 20.
In addition, the term “corner portion” has a meaning that includes arc-like corners (round corners) and portions on which chamfering has been carried out.
Additionally, the above-mentioned description was given using the folded portions 13b and the folded portions 13c, but it is also possible to describe the configuration using the folded portions 13a and the folded portions 13b. More specifically, the incision formation portions 13 that cover the corner portions 16a positioned further on the upstream side than the center in the setting direction A1 have the folded portions 13a as the first cover portions formed between adjacent incisions N, and the folded portions 13b as the second cover portions positioned further on the downstream side in the setting direction A1 than the folded portions 13a and formed between adjacent incisions N, and the end portions 21 of the folded portions 13a on the downstream side in the setting direction A1 are overlapped so as to cover the end portions 22 of the folded portions 13b on the upstream side in the setting direction A1.
In this instance, if the above-mentioned configuration is described from a different viewpoint, the configuration can be described as an attachment method of the friction member 20 in the medium support unit 2 that supports, on the support surface 8, a medium on which printing is to be performed by the printing apparatus 1, the unit being provided with the tray 4 that has the support surface 8 and on which it is possible to set the medium in the setting direction A1 that runs parallel to the support surface 8, and the friction member 20, which is a member having a higher static friction coefficient with respect to the medium than the support surface 8 and is attached to the tray 4 so as to cover the support surface 8, in which the tray 4 has the corner portions 16 at which, when viewed from the support surface 8 side, two different sides intersect, and the friction member 20 has, at positions that correspond to the corner portions 16, the incision formation portions 13 and 14 in which three or more of the incisions N are made. The attachment method of the friction member 20 is an attachment method in which, when covering the corner portions 16a positioned further on the upstream side than the center in the setting direction A1 by using the incision formation portions 13 of the friction member 20, the end portions (the end portions 23 and the end portions 21) of the first cover portions, which are formed between adjacent incisions N, on the downstream side in the setting direction A1 are overlapped so as to cover the end portions (the end portions 24 and the end portions 22) of the second cover portions, which are positioned further on the downstream side in the setting direction A1 than the first cover portions and formed between adjacent incisions N, on the upstream side in the setting direction A1.
That is, in such an attachment method of the friction member 20, at the corner portions 16a positioned further on the upstream side in the setting direction A1 than the center, the end portions (the end portions 24 and the end portions 22) of the cover portions (the folded portions 13b and the folded portions 13c), which are formed between incisions, on the upstream side in the setting direction A1 are covered. At the corner portions 16a positioned further on the upstream side than the center in the setting direction A1, a medium is likely to come into contact with the friction member 20 with a strong frictional force during setting of the medium in the tray 4, and therefore, the end portions (the end portions 24 and the end portions 22) of the cover portions, which are formed between incisions, on the upstream side in the setting direction A1 are particularly likely to become caught or separated due to the medium moving in the setting direction A1. However, as a result of the friction member 20 being attached by using such a method, the end portions of the friction member 20 are unlikely to become caught on a medium even if the medium is moved in the setting direction A1. Therefore, it is possible to firmly fix a medium to the tray 4 by the friction member 20 and it is possible to prevent the friction member 20 from becoming separated during setting of the medium in the tray 4.
In this instance, if the above-mentioned configuration is described from a different viewpoint, the printing apparatus 1 of the present embodiment is provided with the medium support unit 2 and the printing head 7 as a printing section that performs printing on the medium supported by the medium support unit 2. Therefore, the printing apparatus 1 of the present embodiment has a configuration in which it is possible to print with a medium firmly fixed to the tray 4 by the friction member 20 and it is possible to prevent the friction member 20 from becoming separated during setting of the medium in the tray 4.
While the folding sequence of the folded portions 13a, the folded portions 13b, and the folded portions 13c is as mentioned above, and the folding sequence of the folded portions 14a, the folded portions 14b, and the folded portions 14c is an order of the folded portions 14a, the folded portions 14b, and the folded portions 14c. More specifically, firstly, the folded portions 14a are bent. Next, the folded portions 14b are bent so that end portions 26 of the folded portions 14b on the upstream side in the setting direction A1 cover end portions 25 of the folded portions 14a on the downstream side in the setting direction A1. Next, the folded portions 14c are bent so that end portions 28 of the folded portions 14c on the upstream side in the setting direction A1 cover end portions 27 of the folded portions 14b on the downstream side in the setting direction A1. As a result of folding in such an order, as shown in
In this instance, if description is given using the folded portions 14a and the folded portions 14b, the incision formation portions 14 that cover the corner portions 16b positioned further on the downstream side than the center in the setting direction A1 have the folded portions 14a as the third cover portions formed between adjacent incisions N, and the folded portions 14b as the fourth cover portions positioned further on the downstream side in the setting direction A1 than the folded portions 14a and formed between adjacent incisions N, and the end portions 26 of the folded portions 14b on the upstream side in the setting direction A1 are overlapped so as to cover the end portions 25 of the folded portions 14a on the downstream side in the setting direction A1.
That is, in the medium support unit 2 of the present embodiment, the configuration of the incision formation portions 13 and 14 is symmetric in the setting direction A1 with the center in the setting direction A1 as a reference (refer to
Additionally, the above-mentioned description was given using the folded portions 14a and the folded portions 14b, but it is also possible to describe the configuration using the folded portions 14b and the folded portions 14c. More specifically, the incision formation portions 14 that cover the corner portions 16b positioned further on the downstream side than the center in the setting direction A1 have the folded portions 14b as the third cover portions formed between adjacent incisions N, and the folded portions 14c as the fourth cover portions positioned further on the downstream side in the setting direction A1 than the folded portions 14b and formed between adjacent incisions N, and the end portions 28 of the folded portions 14c on the upstream side in the setting direction A1 are overlapped so as to cover the end portions 27 of the folded portions 14b on the downstream side in the setting direction A1.
However, the configuration of the incision formation portions 14 that cover the corner portions 16b positioned further on the downstream side than the center in the setting direction A1 is not limited to the above-mentioned configuration that is shown by
If description is given using the folded portions 14a and the folded portions 14b, as shown in
Additionally, the above-mentioned description was given using the folded portions 14a and the folded portions 14b, but it is also possible to describe the configuration using the folded portions 14b and the folded portions 14c. More specifically, as shown in
In addition, as shown in
In other words, the double sided tape 35 is provided in the tray 4 of the present embodiment as a fixing portion that fixes the friction member 20 in an attachable and detachable manner. Therefore, the medium support unit 2 of the present embodiment has a configuration in which it is possible to easily perform cleaning and replacement of the friction member 20 by attaching and detaching the friction member 20.
Additionally, in the medium support unit 2 of the present embodiment, the double sided tape 35 is provided as the fixing portion, but the fixing portion is not limited to double-sided tape. For example, it is possible to use a surface fastener, a clip, a hook, a surface fastener, and the like.
In this instance, it is preferable that the fixing portion be provided on the rear surface 18 on the side opposite to the support surface 8. In particular, the reason for this is that, in a case in which a clip, a hook, a snap fastener, or the like, is used as the fixing portion, it is possible to make it more likely that a medium becoming caught and the friction member 20 becoming separated are prevented at the fixing portion, in the vicinity of the fixing portion, or the like.
Additionally, the term “provided to the rear surface 18” has a meaning that includes a configuration in which the fixing portion is provided throughout an area from the support surface 8 to the rear surface 18 in the manner of the present embodiment.
In addition, as shown in
In this manner, as a result of the stepped portion 33 for bearing the frame portion that presses a medium, being formed in the 4 in at least one portion of the periphery of the support surface 8, it is possible to use the frame portion that presses a medium according to necessity. In addition, the inclined surface 34 is formed in the periphery of the support surface 8 as a result of the friction member 20 covering the stepped portion 33 so that the inclined surface 34 is formed above the stepped portion 33. The periphery of the support surface 8 is an area in which a medium is likely to rise from the tray 4, but the medium support unit 2 of the present embodiment has a configuration in which it is possible to prevent rising as a result of the inclined surface 34 being formed in the periphery of the support surface 8 is used. As a result of preventing rising, it is possible to prevent contact between a medium (a risen section) and the printing head 7 during printing.
In addition, as shown in
In this instance, the term “the incisions N are made in a radial manner” refers to a configuration in which the respective intervals between the incisions N narrows toward a central side from an edge side of the friction member 20. For example, a configuration such as that shown by
Additionally, the invention is not limited to the above-mentioned embodiment, various modifications are possible within the scope of the invention disclosed in the claims, and, naturally, such alterations are also included within the scope of the invention.
In the above-mentioned embodiment, a configuration in which there are three (four incisions N) folded portions in the incision formation portions 13 and 14 is used, but a configuration in which there are two or four or more folded portions may also be used.
This application claims priority under 35 U.S.C. § 119 to Japanese Patent Application No. 2017-033551, filed Feb. 24, 2017. The entire disclosure of Japanese Patent Application No. 2017-033551 is hereby incorporated herein by reference.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2017-033551 | Feb 2017 | JP | national |
| Number | Name | Date | Kind |
|---|---|---|---|
| 20040189776 | Niimi et al. | Sep 2004 | A1 |
| 20090265972 | Chang | Oct 2009 | A1 |
| 20150331362 | Azeyanagi | Nov 2015 | A1 |
| Number | Date | Country |
|---|---|---|
| 2004-291430 | Oct 2004 | JP |
| Number | Date | Country | |
|---|---|---|---|
| 20180244074 A1 | Aug 2018 | US |
