Medium carrying device and recording device

The medium conveyance device addresses uneven force distribution and wrinkle issues by using a main roller with sub-rollers at varying intervals and a wrinkle removing mechanism, ensuring smooth conveyance and processing of low-rigidity materials.

JP2025110514APending Publication Date: 2025-07-29SEIKO EPSON CORP

Patent Information

Application Number
JP2024004391
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-01-16
Publication Date
2025-07-29

AI Technical Summary

Technical Problem

Existing medium conveyance devices face issues with uneven conveyance force distribution leading to wrinkles and creases, particularly in narrow portions, due to misalignment of rollers and variations in conveyance direction, especially when handling low-rigidity materials like cloth.

Method used

A medium conveyance device with a main roller and a plurality of sub-rollers arranged at varying intervals, including a first and second interval, to stabilize conveyance and reduce wrinkle concentration, accompanied by a wrinkle removing mechanism to further suppress wrinkles.

Benefits of technology

The solution effectively reduces the risk of creases by distributing conveyance forces uniformly and utilizing a wrinkle removing mechanism to ensure smooth processing, even with low-rigidity materials.

✦ Generated by Eureka AI based on patent content.

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Abstract

To reduce the risk that folds may be formed on a medium because wrinkles are intensively caused on a narrow portion.SOLUTION: A medium carrying device comprises: a feeding part that feeds out a medium wound in a roll shape; a main roller that applies feeding force in a conveying direction to the medium; and sub rollers that rotate while holding the medium in a pair with the main roller. The sub rollers are a plurality of rollers constituted of a first roller 91, a second roller 92, a third roller 93, other rollers and an n-th roller N which are alternately lined with intervals D along a longitudinal direction of the main roller. The intervals D have a first interval D1 and a second interval D2 larger than the first interval.SELECTED DRAWING: Figure 5
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Description

Technical Field

[0001] The present invention relates to a medium conveyance device and a recording device.

Background Art

[0002] As an example of this type of device, there is a printing device described in Patent Document 1. Patent Document 1 describes the following. A conveyance unit that conveys a medium such as cut paper or roll paper is configured by a pair of conveyance rollers and a pair of paper feed rollers.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] It is preferable for the pair of conveyance rollers and the pair of paper feed rollers to be a single continuous roller extending in the width direction in terms of conveying the medium. However, since it is costly and it is not easy to achieve the parallelism of one roller with respect to the other roller, it is normal for the other roller to be composed of a plurality of rollers. However, in such a configuration, there is a difference in the conveyance force applied to the medium between the nip portion and the non-nip portion formed by the two rollers. Also, if the orientation of each of the plurality of rollers on the other side is misaligned, there will be variations in the conveyance direction and skew will occur. As a result, when the medium to be conveyed has low rigidity like cloth, wrinkles will occur in the medium. In particular, the wrinkles concentrate in narrow portions such as between the plurality of rollers. When the wrinkles concentrate in a narrow portion, there is a risk of the medium developing creases. However, Patent Document 1 does not mention consideration of the occurrence of the above wrinkles.

Means for Solving the Problems

[0005] To solve the above problems, a medium conveyance device according to the present invention includes a feeding unit that feeds out a medium wound in a roll shape, a main roller that applies a feeding force in the conveyance direction to the medium, and a sub-roller that rotates while sandwiching the medium in a pair with the main roller. The sub-roller is a plurality of rollers including a first roller, a second roller, a third roller, …, an nth roller that are arranged at intervals along the longitudinal direction of the main roller, where n is an integer of 3 or more, and the intervals have a first interval and a second interval that is larger than the first interval.

[0006] Further, a recording device according to the present invention includes a medium conveyance device according to any one of the first to fourth aspects described later, and a recording unit that performs recording on the medium conveyed by the medium conveyance device.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Modes for Carrying Out the Invention

[0008] The present invention will be described below first schematically. The medium conveyance device according to the first aspect of the present invention includes a feeding unit that feeds out a medium wound in a roll shape, a main roller that applies a feeding force in the conveyance direction to the medium, and a sub-roller that rotates while sandwiching the medium in a pair with the main roller. The sub-roller is a plurality of rollers including a first roller, a second roller, a third roller, …, an nth roller (n: an integer of 3 or more) arranged at intervals along the longitudinal direction of the main roller, and the intervals have a first interval and a second interval larger than the first interval.

[0009] The sub-roller is a plurality of rollers including a first roller, a second roller, a third roller, …, an nth roller arranged at intervals along the longitudinal direction of the main roller. If there are variations in the conveyance force and conveyance direction of each of the first roller, the second roller, the third roller, …, the nth roller, wrinkles may occur in the medium. However, according to this aspect, the intervals have a first interval and a second interval larger than the first interval. Thereby, even when wrinkles occur in the medium, since there is a portion of the second interval with a large interval, it is possible to suppress the wrinkles from concentrating on the portion of the first interval with a small interval. Accordingly, it is possible to reduce the risk of the medium being creased due to the wrinkles concentrating on the portion of the first interval with a narrow width.

[0010] The medium conveyance device according to the second aspect of the present invention is an aspect subordinate to the first aspect, and includes a winding unit that winds up the medium conveyed in the conveyance direction, and a processing unit that is disposed between the feeding unit and the winding unit and performs processing on the conveyed medium. The main roller is disposed between the feeding unit and the processing unit. Here, the "processing" in the "processing unit that performs processing on the medium" varies depending on the type of device on which the medium conveyance device is mounted. For example, when mounted on a recording device such as a printer, the processing unit becomes a recording unit having a recording head, and the processing is recording processing. When mounted on a scanner or the like, the processing unit becomes an image reading unit, and the processing is image reading processing.

[0011] According to this aspect, a processing unit that is located between the feeding unit and the winding unit and performs processing on the conveyed medium is provided, and the main roller is located between the feeding unit and the processing unit. Thereby, when the medium is sent to the processing unit for processing, it becomes possible to execute the processing by the processing unit in a state where the generation of wrinkles is suppressed.

[0012] The medium conveyance device according to the third aspect of the present invention is an aspect that depends on the second aspect, and is characterized in that a wrinkle removing mechanism for removing wrinkles generated in the conveyed medium is arranged between the main roller and the processing unit.

[0013] According to this aspect, a wrinkle removing mechanism for removing wrinkles generated in the conveyed medium is arranged between the main roller and the processing unit. Thereby, it becomes possible to execute the processing by the processing unit in a state where the generation of wrinkles is further suppressed by the wrinkle removing mechanism.

[0014] The medium conveyance device according to the fourth aspect of the present invention is an aspect that depends on the third aspect, and the wrinkle removing mechanism includes a first flat plate and a second flat plate, and the first flat plate and the second flat plate are connected to form an obtuse angled bent portion, and the medium is conveyed in contact with the outer surface on the convex side of the bent portion.

[0015] According to this aspect, the medium is conveyed in contact with the outer surface on the convex side of the bent portion in the wrinkle removing mechanism where the first flat plate and the second flat plate are connected to form an obtuse angled bent portion, so that the wrinkles can be removed. Thereby, the wrinkle removing mechanism can be realized with a simple structure.

[0016] The recording apparatus according to the fifth aspect of the present invention includes a medium transport device according to any one of the first to fourth aspects, and a recording unit that performs recording on the medium transported by the medium transport device. According to this aspect, the same effects as those of any one of the second to fourth aspects can be obtained as the recording apparatus.

[0017] [Embodiment] Hereinafter, embodiments of a medium transport device and a recording apparatus equipped with the medium transport device according to the present invention will be described with reference to FIGS. 1 to 9. In the following description, as shown in each figure, three axes orthogonal to each other are defined as the X-axis, Y-axis, and Z-axis, respectively. The directions indicated by the arrows of the three axes (X, Y, Z) are the + directions of the respective directions, and the opposite directions are the - directions. The Z-axis direction corresponds to the vertical direction, that is, the direction in which gravity acts. The +Z direction indicates vertically upward, and the -Z direction indicates vertically downward. The X-axis direction and the Y-axis direction correspond to the horizontal direction. The +Y direction indicates the front direction of the recording apparatus, and the -Y direction indicates the rear direction of the apparatus. The +X direction indicates the right direction of the apparatus, and the -X direction indicates the left direction of the apparatus.

[0018] <Overall schematic description of the recording apparatus> As shown in FIGS. 1 and 2, the recording apparatus 1 of the present embodiment is a digital textile printing machine in which the medium 3 is a fabric. This recording apparatus 1 gives an appropriate tension to the fabric in a conveyance method called the Roll to Reel conveyance method to make the recording range float. The recording apparatus 1 transports the medium 3 fed from the roll body R1 set in the feeding unit 2 in the transport direction F along the transport path 5 by the medium transport device 6. A recording unit 7 having a recording head is arranged along the transport path 5. The medium 3 that has been subjected to the recording process by the recording unit 7 is wound around the roll body R2 of the winding unit 4.

[0019] As one of the constituent members of the medium conveyance device 6, a conveyance roller pair including a main roller 8 and a sub-roller 9 is provided at a position closest to the feeding unit 2 in the conveyance path 5. The main roller 8 applies a feeding force in the conveyance direction F to the medium 3. As shown in FIG. 3, the main roller 8 is composed of a single integral roller, and a portion other than both end portions is rotatably supported by a middle support 15 so as not to drop downward. In the present embodiment, five middle supports 25 are arranged at equal intervals. The sub-roller 9 rotates while sandwiching the medium 3 in a pair with the main roller 8. As other constituent members of the medium conveyance device 6, an upstream conveyance roller pair 10 located upstream of the recording unit 7 and a downstream conveyance roller pair 11 located downstream of the recording unit 7 are provided. Next, the medium conveyance device 6 of the present embodiment will be described in detail although there are some parts that are repeated.

[0020] [Embodiment 1] Based on FIGS. 1 to 5, the medium conveyance device 6 of Embodiment 1 will be described. This medium conveyance device 6 includes a feeding unit 2 that feeds out a medium 2 wound in a roll shape, a main roller 8 that applies a feeding force in the conveyance direction F to the medium 3, and a sub-roller 9 that rotates while sandwiching the medium 3 in a pair with the main roller 8. The sub-roller 9 is a plurality of rollers including a first roller 91, a second roller 92, a third roller 93,..., an nth roller N arranged at intervals D along the X-axis direction which is the longitudinal direction of the single integral main roller 8. Here, n is an integer of 3 or more. In the example shown in FIGS. 3 and 4, the first roller 91 and the second roller 92 are supported by one holder 12. The third roller 93 and the fourth roller 94 are supported by another holder 12. The fifth roller 95 and the sixth roller 96 are supported by another holder 12. The seventh roller 97 and the eighth roller 98 are supported by one holder 12. The ninth roller 99 and the tenth roller 100 are supported by another holder 12. The same applies hereinafter.

[0021] The interval D is configured to have a first interval D1 and a second interval D2 that is larger than the first interval D1. Here, the portion of the interval D2 is created by removing one of the sub-rollers 9 supported by each holder 12. Of course, it is not limited to this structure. For example, one holder 12 may be configured to hold two or three sub-rollers 9, and the portions of the interval D1 and the interval D2 may be created by separating the spaces between the holders 12. Also, the structure may be such that the holder 12 holds one sub-roller 9, and the portions of the interval D1 and the interval D2 may be created. The dimension of the second interval D2 is set by grasping in advance, by means of tests or the like, the state of wrinkles generated with respect to the assumed type of medium.

[0022] As shown in FIG. 1 and as described above, the medium conveyance device 6 of the present embodiment includes a winding unit 4 that winds the medium 3 conveyed in the conveyance direction F, and a recording unit 7 disposed between the feeding unit 2 and the winding unit 4 and serving as a processing unit that performs processing on the conveyed medium 3. The main roller 8 is disposed between the feeding unit 2 and the recording unit 7.

[0023] In the present embodiment, as shown in FIG. 1, a wrinkle removing mechanism 13 for removing wrinkles generated in the conveyed medium 3 is disposed between the main roller 8 and the recording unit 7 which is a processing unit. As shown in FIG. 2, the wrinkle removing mechanism 13 includes a first flat plate 131 and a second flat plate 132. The first flat plate 131 and the second flat plate 132 are connected to form an obtuse angled bent portion 133. As shown in FIG. 1, the medium 3 is conveyed in contact with the outer surface on the convex side of the bent portion 133.

[0024] <Description of the operation of Embodiment 1> Based on FIG. 6, the manner of generation of wrinkles due to the interval D1 and the interval D2 will be described. When a plurality of sub-rollers 9 are arranged at a small interval D1 as shown in the upper position of FIG. 6, the generated wrinkle S enters the portion of the small interval D1 and is pushed in by contact with the periphery of a narrower region, and is likely to become a sharp-shaped wrinkle S as shown in the figure. When in such a state, folds are likely to form in the portion of the wrinkle S. On the other hand, when a plurality of sub-rollers 9 are arranged at an interval D2 greater than the interval D1 as shown in the lower position of FIG. 6, the generated wrinkle S enters the portion of the interval D2, but since there is no contact with the surroundings, it only needs to bend gently. Therefore, there is little risk of creasing.

[0025] <Description of the Effects of Embodiment 1> (1) The sub-rollers 9 are a plurality of rollers including a first roller 91, a second roller 92, a third roller 93,..., an nth roller N arranged at intervals D along the X-axis direction which is the longitudinal direction of the main roller 8. If there are variations in the conveying force and conveying direction of each of the first roller 91, the second roller 92, the third roller 93,..., the nth roller N, wrinkles may occur in the medium 3. However, in this embodiment, the interval D has a first interval D1 and a second interval D2 greater than the first interval D1. Thereby, even when wrinkles S occur in the medium 3, due to the presence of the portion of the second interval D2 with a large interval, it is possible to suppress the concentration of wrinkles in the portion of the first interval D1 with a small interval. Thus, it is possible to reduce the risk of the medium 3 being creased due to the concentration of the wrinkles S in the portion of the narrow first interval D1.

[0026] (2) Further, in this embodiment, a recording unit 7 is provided as a processing unit that is arranged at a position between the feeding unit 2 and the winding unit 4 and performs processing on the conveyed medium 3, and the main roller 8 is arranged between the feeding unit 2 and the recording unit 7. Thereby, when the medium 3 is sent to the recording unit 7 for recording processing, it becomes possible to execute the recording processing by the recording unit 7 in a state where the generation of wrinkles S is suppressed. (3) Further, in this embodiment, a wrinkle removing mechanism 13 for removing wrinkles generated in the conveyed medium 3 is arranged between the main roller 8 and the recording unit 7. Thereby, it becomes possible to execute the recording processing by the recording unit 7 in a state where the generation of wrinkles S is further suppressed by the wrinkle removing mechanism 13. (4) Also, in this embodiment, the medium 3 is conveyed while being in contact with the outer surface on the convex side of the bent portion 133 in the wrinkling mechanism 13 where the first flat plate 131 and the second flat plate 132 are connected to form an obtuse-angled bent portion 133, so that the wrinkle S can be removed. Thereby, the wrinkling mechanism 13 can be realized with a simple structure.

[0027] [Modification Example] Based on FIG. 7, a modification example of the method of providing the second interval D2 will be described. In this modification example, a part of the holder 12 that supports one sub-roller 9 is configured to be rotatable about the proximal end on the side opposite to the sub-roller 9 as a fulcrum. In the case of the medium 3 where wrinkles S are likely to occur, as shown in FIG. 7, the rotatable holder 12 is rotated to form the second interval D2. In the case of the medium 3 where wrinkles S are less likely to occur, the rotatable holder 12 is returned to the position where it contacts the main roller 8. In addition, the rotation angle of the holder 12 when creating the second interval D2 may be such that the sub-roller 9 is not greatly separated from the main roller 8 as shown by the solid line in FIG. 7, or is slightly separated as shown by the broken line.

[0028] [Embodiment 2] Next, based on FIGS. 1 to 3, FIGS. 8 and 9, the medium conveying device 6 of Embodiment 2 will be described. The same parts as those in Embodiment 1 are denoted by the same reference numerals, and the description of their configurations and corresponding effects is omitted. As shown in FIGS. 1 to 3, although it will be a partial repetition of the description, the medium conveying device 6 of this embodiment includes a feeding unit 2, a main roller 8 formed of a single body, and a plurality of sub-rollers 9, 9,... arranged at intervals D along the X-axis direction which is the longitudinal direction of the main roller 8. In this embodiment, each interval D has the same size, but it may have a structure having a first interval D1 and a second interval D2 as in Embodiment 1. The sub-rollers 9, 9,... rotate while sandwiching the medium 3 with the main roller 8 to convey the medium 3.

[0029] As shown in FIG. 8, in the present embodiment, the intermediate portion 17 in the longitudinal direction of the main roller 8 is disposed at a position downstream in the conveying direction F with respect to both end portions 23 and 24. That is, the main roller 8 is attached in a slightly bowed shape. In addition, since this bowed shape is a deformation that cannot be confirmed by the human eye, it is described as a straight line shape instead of a bowed shape in FIG. 3. In FIG. 8, the degree of bowing is exaggerated in order to make it easier to understand that the main roller 8 has a bowed shape.

[0030] As shown in FIG. 8, the bowed shape of the main roller 8 is realized by tilting and installing the first bearing 21 and the second bearing 22 that pivotally support both end portions 23 and 24 of the main roller 8. The state of deformation of the bowed shape is determined by the direction and angle of tilting of the first bearing 21 and the second bearing 22. Thereby, in the main roller 8, the intermediate portion 17 is disposed at a position downstream in the conveying direction F with respect to both end portions 23 and 24.

[0031] As shown in FIG. 3, in the present embodiment, a plurality of intermediate supports 15, 15,... for rotatably supporting the main roller 8 are provided. Among the intermediate supports 15, 15,... disposed at the intermediate portion 17 in the X-axis direction which is the longitudinal direction, those disposed on both end portions 23 and 24 sides in the longitudinal direction are disposed at positions downstream in the conveying direction F. In FIG. 3, since the main roller 8 is described as a straight line shape, the intermediate supports 15, 15,... are also arranged on a straight line. Further, in the present embodiment, the intermediate supports 15, 15,... are configured to be displaceable in the conveying direction F for position adjustment. The main roller 8 shown in FIG. 8 is described with an exaggerated bowed shape as described above. In FIG. 8, although the intermediate supports 15, 15,... are not shown, they are arranged along the bowed main roller 8.

[0032] In this embodiment, the angle at which the first bearing 21 is tilted is set to be larger than the angle at which the second bearing 22 is tilted. That is, the main roller 8 is pivotally supported in a state where it bends more on the first bearing 21 side than on the second bearing 22 side. As a result, as shown in FIG. 8, a bow-shaped configuration is formed in which a portion 19, which is located most downstream in the conveyance direction F within the intermediate portion 17 of the main roller 8, is closer to the first bearing 21. Also, as a result, among the plurality of intermediate supports 15, 15,... the one arranged at the most downstream position in the conveyance direction F is located closer to the first bearing 21, which is one end side in the longitudinal direction of the main roller 8.

[0033] As shown in FIG. 9, in this embodiment, tensions 33 and 34 are applied to the medium 3 being conveyed between the winding unit 4 and the feeding unit 2. These tensions 33 and 34 are generated by setting the winding speed of the winding unit 4 to be slightly faster than the feeding speed of the feeding unit 2, but the method of applying the tension is not limited to a specific one. In this embodiment, since the wrinkling mechanism 13 is provided as described above, the occurrence of wrinkles is suppressed by the synergistic effect with the wrinkling mechanism 13.

[0034] <Explanation of the operation of Embodiment 2> Based on FIG. 8, the suppression of wrinkle generation due to the bow-shaped configuration of the main roller 8 will be described. In this embodiment, the direction of the feeding force applied from the main roller 8 to the medium 3 acts in a direction to spread and flatten the wrinkles generated as a whole, as indicated by arrows A1, A2, A3, and A4, due to the bow-shaped configuration of the main roller 8. Also, when the medium 3 with a small width is positioned and set at the reference position on the first bearing 21 side, it acts in a direction to spread and flatten the wrinkles generated as a whole, as indicated by arrows A2, A3, and A4. As shown in FIG. 9, the narrow-width medium 3 is liable to skew as indicated by arrow 31 due to the feeding force from the main roller 8. In this embodiment, even in this case, as indicated by arrow 32, a force in the direction of correcting the skew is generated by tensions 33 and 34. Thereby, the occurrence of wrinkles and the suppression of skew are achieved.

[0035] <Description of the Effects of Embodiment 2> (1) In this embodiment, the main roller 8 and the sub-roller 9 are provided, and the intermediate portion 17 in the X-axis direction, which is the longitudinal direction of the main roller 8, is arranged at a position downstream in the conveying direction F with respect to the end portions 23 and 24. That is, the main roller 8 is attached in a slightly arched shape. Thereby, the conveying force acts obliquely on the medium 3 to be conveyed in the direction of removing the wrinkle S from the main roller 8, that is, in the direction of spreading and flattening the generated wrinkle S. Therefore, the generation of wrinkles S in the conveyance of the medium 3 with low rigidity such as cloth can be easily suppressed.

[0036] (2) Further, in this embodiment, the middle support 15 arranged at the intermediate portion 17 in the X-axis direction, which is the longitudinal direction, is arranged at a position downstream in the conveying direction F from the middle supports 15 arranged on the end portions 23 and 24 sides in the longitudinal direction. That is, the middle supports 15, 15,... are arranged in the longitudinal direction along the arched shape of the main roller 8. Thereby, the problem of the downward movement of the main roller 8 due to its own weight can be suppressed.

[0037] (3) When conveying media 3 with different widths by the media conveying device 6, the reference position for positioning the media 3 in the X-axis direction, which is the width direction of the media 3 with respect to the media conveying device 6, may be a position on one end side in the width direction instead of the central position in the width direction. In this case, the main roller 8 contacts the medium 3 at a part of the one end side. In this embodiment, among the plurality of intermediate supports 15, 15,..., the one arranged at the most downstream position in the conveyance direction F is arranged at one end side position in the X-axis direction which is the longitudinal direction of the main roller 8, and here it is the intermediate support on the first bearing 21 side. Thereby, even for a medium 3 with a small width, the conveying force can be inclined and applied in a direction to spread and flatten the wrinkle S generated from the main roller 8, and thus the generation of the wrinkle S can be suppressed.

[0038] (4) Further, in this embodiment, the plurality of intermediate supports 15, 15,... are displaceable in the conveyance direction F and the position can be adjusted. Thereby, according to the type of the medium 3, the degree of the bow-shaped of the main roller 8 can be changed to correspond. (5) Further, in this embodiment, a recording unit 7 is provided as a processing unit that is arranged between the feeding unit 2 and the winding unit 4 and performs processing on the conveyed medium 3, and the main roller 8 is arranged between the feeding unit 2 and the recording unit 7. Thereby, when the medium 3 is sent to the recording unit 7 and recording processing is performed, it becomes possible to execute the recording processing by the recording unit 7 in a state where the generation of wrinkles S is suppressed.

[0039] (6) Further, in this embodiment, a wrinkle removing mechanism 13 for removing the wrinkles S generated in the conveyed medium 3 is arranged between the main roller 8 and the recording unit 7. Thereby, it becomes possible to execute the recording processing by the recording unit 7 in a state where the generation of wrinkles S is further suppressed by the wrinkle removing mechanism 13. (7) Further, in this embodiment, the medium 3 is conveyed while contacting the outer surface on the convex side of the bent portion in the wrinkle removing mechanism in which the first flat plate and the second flat plate are connected to form an obtuse-angled bent portion, and thus the wrinkle can be removed. Thereby, the wrinkle removing mechanism can be realized with a simple structure. (8) Further, in this embodiment, tensions 33, 34 are applied to the conveyed medium 3 between the winding unit 4 and the feeding unit 2. Thereby, due to the synergistic effect with the wrinkle removing mechanism 13, the generation of wrinkles S can be further suppressed.

[0040] 〔Other Embodiments〕 The recording apparatus 1 according to the present invention is basically configured as described in the above embodiment, but it is of course possible to make partial configuration changes, omissions, etc. within the scope not departing from the gist of the present invention. In the above embodiment, the bow-shaped configuration of the main roller 8 is not symmetric in the width direction and is shifted toward the first bearing 21 side. However, when the reference position for alignment is at the center, the bow-shaped configuration is preferably symmetric.

Explanation of Reference Numerals

[0041] 1... Recording apparatus, 2... Feeding unit, 3... Medium, 4... Take-up unit, 5... Conveying path, 6... Medium conveying device, 7... Recording unit, 8... Main roller, 9... Sub-roller, 10... Upstream conveying roller pair, 11... Downstream conveying roller pair, 12... Holder, 13... Wrinkle removal mechanism, 15... Intermediate support, 17... Intermediate portion, 19... Portion located most downstream in the conveying direction, 23... End, 24... End, 91... First roller, 92... Second roller, 93... Third roller, 94... Fourth roller, 95... Fifth roller, 96... Sixth roller, 97... Seventh roller, 98... Eighth roller, 99... Ninth roller, 100... Tenth roller, 131... First flat plate, 132... Second flat plate, 133... Bending portion, D... Interval, D1... First interval, D2... Second interval, F... Conveying direction, R1... Roll body, R2... Roll body, S... Wrinkle

Claims

1. A feeding unit that feeds out a medium wound in a roll shape, A main roller that applies a feeding force in the conveying direction to the medium, A sub-roller that rotates while sandwiching the medium in a pair with the main roller, and The sub-roller is a plurality of rollers including a first roller, a second roller, a third roller, …, an nth roller (n: an integer of 3 or more) arranged at intervals along the longitudinal direction of the main roller, The intervals are A first interval, A second interval larger than the first interval, and A medium conveying device characterized by this.

2. In the medium conveying device according to Claim 1, A winding unit that winds up the medium conveyed in the conveying direction, A processing unit that is arranged between the feeding unit and the winding unit and performs processing on the conveyed medium, and The main roller is arranged between the feeding unit and the processing unit, A medium conveying device characterized by this.

3. In the medium conveying device according to Claim 2, A wrinkle removing mechanism that removes wrinkles generated in the conveyed medium is arranged between the main roller and the processing unit, A medium conveying device characterized by this.

4. In the medium conveying device according to Claim 3, The wrinkle removing mechanism Includes a first flat plate and a second flat plate, The first flat plate and the second flat plate are connected to form an obtuse-angled bent portion, The medium is conveyed in contact with the outer surface on the convex side of the bent portion, A medium conveying device characterized by this.

5. A medium conveying device according to any one of Claims 1 to 4, and A recording unit that executes recording on the medium conveyed by the medium conveying device, A recording device characterized by this.

Citation Information

Patent Citations

  • Recording device, and recording method

    JP2016182716A

Cited By

  • Medium transport device and recording device

    EP4592232A1