Medium carrying device and recording device

Abstract

To easily suppress wrinkles from being caused, in carrying a medium with low rigidity such as a cloth.SOLUTION: A medium carrying device 6 comprises: a feeding part 2 that feeds out a medium 3 wound in a roll shape; a main roller 8 formed of a single body that applies feeding force in a carrying direction F to the medium; and a plurality of sub rollers 9, alternately lined up with intervals D along a longitudinal direction of the main roller 8, which rotate while holding the medium in pair with the main roller 8. An intermediate part 17 in the longitudinal direction of the main roller 8 is positioned at a downstream side in the carrying direction F with respect to end parts 23 and 24.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a medium conveying 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 conveying unit that conveys a medium such as cut paper or roll paper is configured by a pair of conveying rollers and a pair of paper feeding 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 conveying rollers and the pair of paper feeding rollers to be a single continuous roller extending in the width direction for 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 conveying 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 conveying 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. However, Patent Document 1 does not consider the above-mentioned potential problems.

Means for Solving the Problems

[0005] In order to solve the above problem, the media transport device of the present invention comprises a feed section that feeds out a rolled-up media, a main roller consisting of a single body that applies a feed force to the media in the transport direction, and a plurality of sub-rollers that are arranged at intervals along the longitudinal direction of the main roller, and the sub-rollers rotate while clamping the media in pairs with the main roller, and are characterized in that the middle part of the main roller in the longitudinal direction is located downstream in the transport direction relative to the end parts.

[0006] Furthermore, the recording device according to the present invention is characterized by comprising a medium conveying device according to any one of the first to eighth aspects described below, and a recording unit that performs recording on the medium conveyed by the medium conveying device. [Brief description of the drawings]

[0007]

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[0008] The present invention will now be briefly described. The media conveyance device according to the first aspect of the present invention includes a feeding unit that feeds out a roll-shaped media, a main roller that is a single unit that applies a feeding force in the conveyance direction to the media, and a plurality of sub-rollers arranged at intervals along the longitudinal direction of the main roller, wherein the sub-roller rotates while sandwiching the media in a pair with the main roller, and an intermediate portion in the longitudinal direction of the main roller is arranged at a position downstream in the conveyance direction with respect to the end portion.

[0009] According to this aspect, it includes the main roller and the sub-roller, and an intermediate portion in the longitudinal direction of the main roller is arranged at a position downstream in the conveyance direction with respect to the end portion. That is, the main roller is attached in a slightly arched shape. As a result, the conveyance force acts obliquely on the conveyed media in a direction to remove wrinkles from the main roller, that is, in a direction to spread and flatten the generated wrinkles, so that the generation of wrinkles in the conveyance of a media with low rigidity such as cloth can be easily suppressed.

[0010] The media conveyance device according to the second aspect of the present invention is an aspect subordinate to the first aspect, and includes a plurality of intermediate supports that rotatably support the main roller, and the intermediate support arranged at the intermediate portion in the longitudinal direction is arranged at a position downstream in the conveyance direction with respect to the intermediate support arranged at the end portion in the longitudinal direction.

[0011] According to this aspect, the intermediate support arranged at the intermediate portion in the longitudinal direction is arranged at a position downstream in the conveyance direction with respect to the intermediate support arranged at the end portion in the longitudinal direction. That is, the intermediate support is arranged in the longitudinal direction along the arched shape of the main roller. Thereby, the problem of the main roller 8 sagging due to gravity can be suppressed.

[0012] The media conveyance device according to the third aspect of the present invention is an aspect that depends on the second aspect, and among the plurality of the middle supports, the one arranged at the most downstream position in the conveyance direction is a middle support arranged at one end side position in the longitudinal direction of the main roller.

[0013] When conveying media with different widths using a media conveyance device, there are cases where the reference position for positioning the media in the width direction with respect to the media conveyance device is set to 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 media at a part of the one end side. According to this aspect, among the plurality of the middle supports, the one arranged at the most downstream position in the conveyance direction is a middle support arranged at one end side position in the longitudinal direction of the main roller. As a result, even for a narrow media, the conveyance force can be inclined and act in a direction to spread and flatten the wrinkles generated from the main roller, thereby suppressing the generation of wrinkles.

[0014] The media conveyance device according to the fourth aspect of the present invention is an aspect that depends on the second aspect, and is characterized in that the plurality of the middle supports are displaceable in the conveyance direction and position adjustable.

[0015] According to this aspect, the plurality of the middle supports are displaceable in the conveyance direction and position adjustable. Thereby, according to the type of the media, it is possible to change the degree of the arch shape of the main roller and respond.

[0016] The media conveyance device according to the fifth aspect of the present invention is an aspect that depends on the first aspect, and includes a winding unit that winds the media conveyed in the conveyance direction, and a processing unit that is arranged between the feeding unit and the winding unit and performs processing on the conveyed media. The main roller is positioned between the feeding unit and the processing unit. Note that this aspect can also be made to depend on any one of the second aspect to the fourth aspect.

[0017] According to this aspect, a processing unit is provided between the feeding unit and the winding unit to perform processing on the conveyed medium, and the main roller is disposed 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 while suppressing the generation of wrinkles.

[0018] The medium conveyance device according to the sixth aspect of the present invention is an aspect subordinate to the fifth aspect, characterized in that a wrinkle removing mechanism for removing wrinkles generated in the conveyed medium is disposed between the main roller and the processing unit.

[0019] According to this aspect, a wrinkle removing mechanism for removing wrinkles generated in the conveyed medium is disposed between the main roller and the processing unit. Thereby, it becomes possible to execute the processing by the processing unit while further suppressing the generation of wrinkles by the wrinkle removing mechanism.

[0020] The medium conveyance device according to the seventh aspect of the present invention is an aspect subordinate to the sixth aspect, characterized in that 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 bending portion, and the medium is conveyed in contact with the outer surface on the convex side of the bending portion.

[0021] According to this aspect, the medium is conveyed in contact with the outer surface on the convex side of the bending portion in the wrinkle removing mechanism where the first flat plate and the second flat plate are connected to form an obtuse bending portion, thereby removing the wrinkles. Thereby, the wrinkle removing mechanism can be realized with a simple structure.

[0022] The medium conveyance device according to the eighth aspect of the present invention is an aspect subordinate to the sixth aspect, characterized in that tension is applied to the conveyed medium between the winding unit and the feeding unit.

[0023] According to this aspect, tension is applied to the transported medium between the winding section and the feeding section, which has a synergistic effect with the wrinkle removal mechanism, thereby further suppressing the occurrence of wrinkles.

[0024] A recording device according to a ninth aspect of the present invention is characterized by comprising a medium conveying device according to any one of the first to eighth aspects, and a recording unit that performs recording on the medium conveyed by the medium conveying device. According to this aspect, the recording device can achieve the same effects as any one of the second to fourth aspects.

[0025] [Embodiment] Hereinafter, an embodiment of a medium transport device according to the present invention and a recording device equipped with the medium transport device will be described with reference to FIGS. In the following explanation, the three mutually orthogonal axes are referred to as the X-axis, Y-axis, and Z-axis, as shown in each figure. The directions indicated by the arrows on the three axes (X, Y, Z) are the + direction of each axis, and the opposite is the - direction. The Z-axis direction corresponds to the vertical direction, i.e., the direction in which gravity acts, the +Z direction indicates a vertically upward direction, and the -Z direction indicates a vertically downward direction. The X-axis and Y-axis directions correspond to horizontal directions. The +Y direction indicates the front direction of the recording device, and the -Y direction indicates the rear direction of the device. The +X direction indicates the right direction of the device, and the -X direction indicates the left direction of the device.

[0026] <Overall overview of the recording device> 1 and 2, the recording apparatus 1 of this embodiment is what is called a digital textile printing machine, and uses fabric as the medium 3. This recording apparatus 1 uses a transport method called a roll-to-reel transport method to apply appropriate tension to the fabric, keeping the recording area in a raised state. In the recording device 1, the medium 3 is fed from a roll R1 set in a feeding unit 2 and conveyed in a conveying direction F along a conveying path 5 by a medium conveying device 6. A recording unit 7 having a recording head is arranged along the conveying path 5. The medium 3 that has been recorded in the recording unit 7 is wound onto a roll R2 in a winding unit 4.

[0027] 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 the 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 integrated 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 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.

[0028] [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 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 an interval D from each other along the X-axis direction that is the longitudinal direction of the single integrated 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.

[0029] 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 structured 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 holder 12 may be structured to hold 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, through tests or the like, the state of wrinkles generated for the assumed type of medium.

[0030] 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 positioned between the feeding unit 2 and the winding unit 4 and serving as a processing unit that processes the conveyed medium 3. The main roller 8 is positioned between the feeding unit 2 and the recording unit 7.

[0031] In the present embodiment, as shown in FIG. 1, a wrinkle removing mechanism 13 that removes wrinkles generated in the conveyed medium 3 is disposed between the main roller 8 and the recording unit 7 which is the 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 that becomes the convex side of the bent portion 133.

[0032] <Description of the operation of Embodiment 1> Based on FIG. 6, the manner of wrinkle generation due to the interval D1 and the interval D2 will be described. When multiple sub-rollers 9 are arranged with a small gap D1 between them as shown in the upper position of Fig. 6, the wrinkles S that have occurred tend to get into the small gap D1 and are pushed in by contact with the surrounding area in a narrower region, resulting in the wrinkles S with a pointed shape as shown in the figure. In this state, the wrinkles S are likely to develop creases. In contrast, when multiple sub-rollers 9 are arranged at a distance D2 larger than the distance D1 as shown in the lower position of Figure 6, the wrinkles S that occur enter the area of the distance D2, but since there is no contact with the surrounding area, they only bend gently. Therefore, there is little risk of creases forming.

[0033] <Explanation of Effects of Embodiment 1> (1) The sub-rollers 9 are a plurality of rollers, namely, a first roller 91, a second roller 92, a third roller 93, ..., an n-th roller N, that are arranged at a distance D from each other along the X-axis direction, which is the longitudinal direction of the main roller 8. If there is variation in the conveying force or conveying direction of the first roller 91, the second roller 92, the third roller 93, ..., the n-th roller N, wrinkles may occur in the medium 3. However, in this embodiment, the distance D has a first distance D1 and a second distance D2 that is larger than the first distance D1. As a result, even if wrinkles S occur in the medium 3, the presence of the larger second distance D2 portion of the wrinkles S can prevent the wrinkles from concentrating in the smaller first distance D1 portion. This reduces the risk of wrinkles S concentrating in the narrow first distance D1 portion, which can cause creases in the medium 3.

[0034] (2) Furthermore, in this embodiment, a recording unit 7 is provided as a processing unit that is located between the unwinding unit 2 and the winding unit 4 and processes the transported medium 3, and the main roller 8 is located between the unwinding unit 2 and the recording unit 7. This makes it possible for the recording unit 7 to perform the recording process while suppressing the occurrence of wrinkles S when the medium 3 is sent to the recording unit 7 for recording processing. (3) Further, in the present embodiment, a wrinkle removing mechanism 13 for removing wrinkles generated in the medium 3 being conveyed is disposed between the main roller 8 and the recording unit 7. Thereby, it becomes possible to execute the recording process by the recording unit 7 in a state where the generation of the wrinkles S is further suppressed by the wrinkle removing mechanism 13. (4) Further, in the present 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 wrinkle removing mechanism 13 where the first flat plate 131 and the second flat plate 132 are connected to form an obtuse bent portion 133, so that the wrinkles S can be removed. Thereby, the wrinkle removing mechanism 13 can be realized with a simple structure.

[0035] [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 a base 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 a position where it contacts the main roller 8. Note that 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 slightly separated as shown by the broken line.

[0036] [Embodiment 2] Next, based on FIGS. 1 to 3, FIGS. 8 and 9, the medium conveyance 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 explanation, the medium conveyance device 6 of the present 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 be structured to have 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.

[0037] As shown in FIG. 8, in this embodiment, the middle portion 17 in the longitudinal direction of the main roller 8 is located on the downstream side 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. Note that since this bowed shape is a deformation that cannot be confirmed by the human eye, in FIG. 3, it is described as a straight line shape instead of a bowed shape. In FIG. 8, the degree of bowing is exaggerated for easy understanding that the main roller 8 is in a bowed shape.

[0038] As shown in FIG. 8, the bowed shape of the main roller 8 is realized by tilting 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 tilting direction and angle of the first bearing 21 and the second bearing 22. Thereby, in the main roller 8, the middle portion 17 is located on the downstream side in the conveying direction F with respect to both end portions 23 and 24.

[0039] As shown in FIG. 3, in this embodiment, a plurality of intermediate supports 15, 15,... for rotatably supporting the main roller 8 are provided. Among the intermediate supports 15, 15,... arranged at the middle portion 17 in the X-axis direction, which is the longitudinal direction, those arranged on both end portions 23 and 24 sides in the longitudinal direction are arranged at positions downstream in the conveying direction F. Note that 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 this embodiment, the intermediate supports 15, 15,... are configured to be displaceable in the conveying direction F for position adjustment. As described above, the main roller 8 shown in FIG. 8 is depicted with an exaggerated bow shape. In FIG. 8, the intermediate supports 15, 15,... are not shown, but are arranged along the bow-shaped main roller 8.

[0040] In this embodiment, the angle at which the first bearing 21 tilts is set to be larger than the angle at which the second bearing 22 tilts. 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, the main roller 8 has a bow shape such that the portion 19 located closest to the first bearing 21 among the intermediate portions 17 of the main roller 8 is in a position closer to the first bearing 21 in the downstream direction F of the conveyance direction. 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 in a position close to the first bearing 21, which is one end side in the longitudinal direction of the main roller 8.

[0041] As shown in FIG. 9, in this embodiment, tensions 33, 34 are applied to the medium 3 being conveyed between the winding unit 4 and the feeding unit 2. These tensions 33, 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.

[0042] <Explanation of the operation of Embodiment 2> Based on FIG. 8, the suppression of wrinkle generation due to the bow shape 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 flatten the wrinkles generated as a whole, as indicated by arrows A1, A2, A3, and A4, due to the bow shape of the main roller 8. Also, when the narrow medium 3 is positioned and set at the reference position on the first bearing 21 side, as shown by the arrows A2, A3, and A4, it acts in a direction to flatten the wrinkles generated as a whole by spreading them. As shown in FIG. 9, the narrow medium 3 is likely to skew as shown by the arrow 31 due to the feeding force from the main roller 8. In this embodiment, even in this case, as shown by the arrow 32, a force in the direction to correct the skew is generated by the tensions 33 and 34. Thereby, the generation of wrinkles and the suppression of skew are achieved.

[0043] <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 conveyance direction F with respect to the end portions 23 and 24. That is, the main roller 8 is attached in a slightly bowed shape. Thereby, the conveyance force acts obliquely on the medium 3 to be conveyed in a direction to remove the wrinkle S from the main roller 8, that is, in a direction to flatten the generated wrinkle S. Therefore, the generation of the wrinkle S in the conveyance of the medium 3 with low rigidity such as cloth can be easily suppressed.

[0044] (2) Also, 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 conveyance direction F from the middle supports 15 arranged on the end portion 23 and 24 sides in the longitudinal direction. That is, the middle supports 15, 15,... are arranged in the longitudinal direction along the bowed shape of the main roller 8. Thereby, the problem of the downward movement due to the gravity of the main roller 8 can be suppressed.

[0045] (3) When conveying media 3 with different widths by the media conveyance 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 conveyance 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 media 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 the medium 3 with a small width, the conveying force can be inclined and acted in a direction to spread and flatten the wrinkles S generated from the main roller 8, and thus the generation of wrinkles S can be suppressed.

[0046] (4) Further, in this embodiment, the plurality of intermediate supports 15, 15, … can be displaced in the conveyance direction F and their positions can be adjusted. Thereby, according to the type of the medium 3, it is possible to change the degree of the arch shape of the main roller 8 and make corresponding adjustments. (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.

[0047] (6) Further, in this embodiment, a wrinkle removing mechanism 13 for removing the wrinkles S generated on 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 where the first flat plate and the second flat plate are connected to form an obtuse bent portion, and thus the wrinkles 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.

[0048] 〔Other Embodiments〕 The recording apparatus 1 according to the present invention is basically configured as described in the above-described embodiments, but it is of course possible to make partial configuration changes, omissions, etc. within a range that does not deviate from the gist of the present invention. In the above embodiment, the bow-shaped shape of the main roller 8 is not a symmetric shape in the width direction and is shifted toward the first bearing 21 side. However, when the reference position for alignment is at the center, it is preferable to make the bow-shaped shape a symmetric shape.

Explanation of Reference Numerals

[0049] 1... Recording apparatus, 2... Pay-out 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 removing mechanism, 15... Middle support, 17... Intermediate part, 19... The part 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 part, 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 composed of a single body that applies a feeding force in the conveying direction to the medium, A plurality of sub-rollers arranged at intervals along the longitudinal direction of the main roller, the sub-rollers rotating while sandwiching the medium in a pair with the main roller, An intermediate portion in the longitudinal direction of the main roller is arranged at a downstream position in the conveying direction with respect to the end portion, A medium conveying device characterized by this.

2. In the medium conveying device according to Claim 1, It includes a plurality of middle supports that rotatably support the main roller, The middle support arranged at the intermediate portion in the longitudinal direction is arranged at a downstream position in the conveying direction with respect to the middle support arranged at the end portion in the longitudinal direction, A medium conveying device characterized by this.

3. In the medium conveying device according to Claim 2, Among the plurality of middle supports, the one arranged at the most downstream position in the conveying direction is the middle support arranged at one end side position in the longitudinal direction of the main roller, A medium conveying device characterized by this.

4. In the medium conveying device according to Claim 2, The plurality of middle supports are displaceable in the conveying direction and position adjustable, A medium conveying device characterized by this.

5. 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 located between the feeding unit and the winding unit and performs processing on the conveyed medium, The main roller is arranged between the feeding unit and the processing unit, A medium conveying device characterized by this.

6. In the medium conveying device according to Claim 5, A wrinkle removing mechanism for removing wrinkles generated in the conveyed medium is arranged between the main roller and the processing unit, A medium conveying device characterized by this.

7. In the medium conveying device according to Claim 6, The wrinkle removing mechanism, Comprises 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.

8. In the medium conveying device according to Claim 6, Tension is applied to the conveyed medium between the winding unit and the feeding unit, A medium conveying device characterized by this.

9. A medium conveyance device according to any one of claims 1 to 8, and a recording unit that performs recording on the medium conveyed by the medium conveyance device, and comprising a recording apparatus characterized by the above.

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