recording device

Abstract

The present application provides a recording device which solves the problem that the negative pressure of the negative pressure chamber can be insufficient at the end portion in the width direction of the medium when suction is performed at the central portion in the width direction of the recording medium. The printer is provided with a recording portion, a support portion, a negative pressure chamber, a first division chamber and a second division chamber, a first suction port and a second suction port. The support portion has a support surface opposite to the recording portion and supporting the paper. The negative pressure chamber is arranged on the side opposite to the recording portion with respect to the support portion. The first division chamber and the second division chamber have a first bottom surface and a second bottom surface. The first suction port and the second suction port communicate the space outside with the negative pressure chamber. The opening area of the second suction port is smaller than that of the first suction portion. The second suction port arranged at the most upstream in the first division chamber is arranged at the upstream in the conveying direction compared with the first suction port arranged at the most upstream in the second division chamber.

Description

Technical Field

[0001] This invention relates to a recording device. Background Technology

[0002] The liquid jetting device described in Patent Document 1 includes a suction device and an imprint plate having multiple grooves arranged in the width direction of the medium. In each of the multiple grooves, holes are formed for suctioning the medium.

[0003] In the case of a liquid jetting device like the one in Patent Document 1, where suction is performed at the center of the medium in the width direction, the negative pressure in the negative pressure chamber may be insufficient at the ends of the medium in the width direction.

[0004] Patent Document 1: Japanese Patent Application Publication No. 2013-22897 Summary of the Invention

[0005] The recording apparatus according to the present invention, for solving the aforementioned problems, is characterized by comprising: a recording section for recording a recording medium conveyed in a conveying direction; a support section disposed opposite to the recording section and having a support surface for supporting the recording medium; a negative pressure chamber disposed on the side opposite to the recording section relative to the support section; a plurality of partitioned chambers formed on the support section and having a bottom surface recessed from the support surface, and disposed in a width direction intersecting the conveying direction; and a plurality of suction ports formed on the support section, communicating a space on the outer side of the support surface with the negative pressure chamber, wherein the plurality of partitioned chambers have at least one first slit. The recording medium is divided into a first partition chamber and at least one second partition chamber. The first partition chamber is positioned inside the recording medium and closest to its end in the width direction. The second partition chamber is positioned inside the first partition chamber in the width direction. The plurality of suction ports have at least one first suction port and at least one second suction port. The second suction port has a second opening area smaller than the first opening area of ​​the first suction port. The second suction port positioned upstream in the transport direction in the first partition chamber is positioned upstream in the transport direction compared to the first suction port positioned upstream in the transport direction in the second partition chamber. Attached Figure Description

[0006] Figure 1 This is an overall structural diagram of the printer involved in the implementation method.

[0007] Figure 2 This is a perspective view showing the interior of the printing plate unit in the printer according to the embodiment.

[0008] Figure 3 A top view illustrating a portion of the printing platen unit in the printer according to the embodiment.

[0009] Figure 4 A perspective view showing an enlarged portion of the printing platen unit in the printer according to the embodiment.

[0010] Figure 5 This is a longitudinal sectional view showing the internal structure of the printing plate unit in the printer according to the embodiment.

[0011] Figure 6 This is a perspective view showing the interior of the printing plate unit in the printer according to the embodiment.

[0012] Figure 7 This is a partial top view of a portion of the printing platen unit in the printer involved in the modified example, magnified. Detailed Implementation

[0013] Hereinafter, the recording apparatus of the first to fourteenth embodiments of the present invention will be described in summary.

[0014] The recording apparatus according to the first aspect of the present invention for solving the above-mentioned problems is characterized by comprising: a recording section for recording a recording medium conveyed in a conveying direction; a support section disposed opposite to the recording section and having a support surface for supporting the recording medium; a negative pressure chamber disposed on the side opposite to the recording section relative to the support section; a plurality of partitioned chambers formed on the support section and having a bottom surface recessed from the support surface and disposed in a width direction intersecting the conveying direction; and a plurality of suction ports formed on the support section, communicating a space on the outer side of the support surface with the negative pressure chamber, wherein the plurality of partitioned chambers have at least one first... The recording medium is provided with a first partition chamber and at least one second partition chamber. The first partition chamber is positioned opposite the recording medium at a location that is inside and closest to the end of the recording medium in the width direction. The second partition chamber is positioned inside the first partition chamber in the width direction. The plurality of suction ports have at least one first suction port and at least one second suction port. The second suction port has a second opening area that is smaller than the first opening area of ​​the first suction port. The second suction port positioned upstream in the transport direction in the first partition chamber is positioned upstream in the transport direction compared to the first suction port positioned upstream in the transport direction in the second partition chamber.

[0015] According to this method, air located on the outer side of the support portion flows into the negative pressure chamber through at least one first suction port and at least one second suction port. This airflow causes the recording medium to be drawn towards the support portion and transported.

[0016] Here, even if the negative pressure of the negative pressure chamber is sometimes insufficient at the end of the width direction of the support, since the second suction port in the first partition chamber is positioned upstream of the first suction port in the second partition chamber, the end of the recording medium in the width direction is suctioned first compared to the central portion, thus the insufficient suction at the end of the width direction of the recording medium can be suppressed.

[0017] Furthermore, by making the opening area of ​​the second suction port, located upstream of the first suction port, smaller than the opening area of ​​the first suction port, the inflow velocity of air into the second suction port is higher than that into the first suction port. This further suppresses insufficient suction at the width-direction end of the recording medium.

[0018] The recording device involved in the second method is characterized in that, in the first method, the number of the second suction ports is greater than the number of the first suction ports.

[0019] According to this method, since the portion of the recording medium that is drawn in the width direction is increased compared to the central portion, it is possible to suppress the floating of the end of the recording medium in the width direction in the support portion.

[0020] The recording device involved in the third method is characterized in that, in the first or second method, the bottom surface has at least one column that rises vertically from the bottom surface, the height of the upper surface of the column in the vertical direction is lower than the height of the support surface in the vertical direction, and the plurality of suction ports are through holes that penetrate the column in the vertical direction.

[0021] According to this method, each of the plurality of suction ports is formed as a cylindrical shape extending in the vertical direction. Therefore, since the frequency of the sound produced is lower than that of a structure with the plurality of suction ports formed on the support surface, it is difficult to produce the so-called whistling phenomenon, thereby suppressing noise. Furthermore, since the height of the upper surface is lower than the height of the support surface, it is possible to prevent a portion of the recording medium supported on the support surface from being adsorbed onto the upper surface of the column portion.

[0022] The recording device involved in the fourth method is characterized in that, in any one of the first to third methods, the bottom surface has at least one rib, the rib being disposed at a position different from the suction port in the conveying direction and extending in the conveying direction.

[0023] According to this method, since the recording medium is supported by contacting the rib before contacting the bottom surface, it is possible to prevent a portion of the transported recording medium from sagging onto the bottom surface.

[0024] The recording device according to the fifth method is characterized in that, in the fourth method, the center of the suction port in the width direction and the center of the rib in the width direction are arranged side by side in the conveying direction.

[0025] According to this method, when a portion of the recording medium is drawn in by the suction port, the ribs upstream or downstream of the suction port in the transport direction support the recording medium, thus preventing a portion of the transported recording medium from sagging to the bottom surface.

[0026] The recording device according to the sixth method is characterized in that, in the fourth or fifth method, the height of at least a portion of the top of the rib is aligned with the height of the support surface.

[0027] According to this method, since a portion of the recording medium opposite to the partition chamber is supported by the rib in the same way as the portion supported by the support surface, it is possible to prevent the recording medium from falling into the partition chamber.

[0028] The recording device according to the seventh method is characterized in that, in any one of the fourth to sixth methods, the upstream end of the rib in the conveying direction has an inclined surface that rises toward the downstream.

[0029] According to this method, even if a portion of the recording medium falls toward the bottom surface of the partition chamber, the height of the recording medium is raised because the portion of the recording medium is guided by contact with the inclined surface, thus preventing the portion of the recording medium from getting stuck on the rib.

[0030] The recording device according to the eighth method is characterized in that, in any one of the fourth to seventh methods, the wall portion of the suction port and the rib portion are integrally formed.

[0031] According to this method, when an external force is applied to the wall portion of the suction port, the strength of the wall portion of the suction port can be increased because the ribs support the wall portion.

[0032] The recording device according to the ninth aspect is characterized in that, in the eighth aspect, the support portion has an inner wall surface that forms part of the wall surface of the negative pressure chamber, and the inner wall surface in the support portion is a flat surface corresponding to the position of the wall portion where the support surface, the suction port and the rib are formed.

[0033] According to this method, by making a portion of the inner wall surface of the negative pressure chamber flat, the pressure loss in the negative pressure chamber is reduced compared to a structure with protrusions formed on the inner wall surface, thus suppressing the decrease in suction force at the suction port.

[0034] Furthermore, since the portion of the support that is opposite to the flat surface becomes a protrusion protruding from the bottom surface, the support can be easily shaped.

[0035] The recording apparatus according to the tenth method is characterized in that, in any one of the first to ninth methods, the recording unit performs recording by ejecting droplets onto the recording medium, and a droplet receiving portion is provided at the end of the recording medium in the width direction on the support surface, the droplet receiving portion receiving the droplets when performing borderless recording on the recording medium, and the first dividing chamber is adjacent to the droplet receiving portion in the width direction.

[0036] The recording device according to the eleventh method is characterized in that, in the tenth method, the droplet receiving portion is disposed in the support surface at a reference position located at one end of the recording medium in the width direction.

[0037] According to this method, since one end of the recording medium in the width direction is attracted to the support at the reference position, the support can support one end of the recording medium in the width direction even if the size of the recording medium is changed.

[0038] The recording apparatus according to the twelfth aspect is characterized in that, in the eleventh aspect, the recording unit is configured to be capable of recording on a plurality of recording media of different sizes in the width direction, and the droplet receiving portion, which is provided at a position other than the reference position, is provided in a plurality of positions according to the position of the other end of the recording medium in the width direction.

[0039] According to this method, even if the size of the recording medium is changed, both ends of the recording medium in the width direction can be supported.

[0040] The recording device according to the thirteenth method is characterized in that, in any one of the first to twelfth methods, a discharge part for discharging air from the negative pressure chamber is provided at one end of the negative pressure chamber in the width direction.

[0041] According to this method, when the smaller recording medium is conveyed biased towards one side of the width direction, a discharge section is provided in the negative pressure chamber on one side of the width direction, thereby enabling effective suction of the end of the smaller recording medium.

[0042] The recording apparatus according to the fourteenth aspect is characterized in that, in the thirteenth aspect, a movable wall is provided in the negative pressure chamber on the side opposite to the side where the discharge portion is located in the width direction. The movable wall is capable of dividing the negative pressure chamber into a first negative pressure chamber provided with the discharge portion and a second negative pressure chamber not provided with the discharge portion. When the width of the recording medium in the width direction is less than or equal to the width of the first negative pressure chamber in the width direction, the movable wall divides the negative pressure chamber into the first negative pressure chamber and the second negative pressure chamber. When the width of the recording medium in the width direction is greater than the width of the first negative pressure chamber in the width direction, the division between the first negative pressure chamber and the second negative pressure chamber is released.

[0043] According to this method, when the width of the recording medium in the width direction is less than or equal to the width of the first negative pressure chamber in the width direction, the pressure drop in the first negative pressure chamber is suppressed because the negative pressure chamber is divided by the movable wall, thus suppressing the possibility of the recording medium floating.

[0044] On the other hand, when the width of the recording medium in the width direction is greater than the width of the first negative pressure chamber, since the division of the negative pressure chamber by the movable wall is removed, the suction of the recording medium can be performed even at the part corresponding to the second negative pressure chamber. Therefore, even if the recording medium is large in size, the floating of the end of the recording medium in the width direction can be suppressed.

[0045] Hereinafter, an example of the recording device of the present invention will be specifically described.

[0046] In the accompanying figures, the X-direction along the X-axis is an example of the device width direction of the printer 10 and the width direction of the recording medium, as described below. The -X-direction becomes the left direction when viewed from the user's perspective with the front surface of the device facing the user, and the +X-direction becomes the right direction.

[0047] The Y-direction along the Y-axis is an example of the longitudinal direction of the printer 10. The +Y-direction is an example of the direction from the back of the device toward the front surface, and is also an example of the transport direction of the paper P and the roll paper PR in the impression plate unit 30, as described later. The -Y-direction is the direction from the front surface of the device toward the back. The X and Y directions are horizontal directions.

[0048] The Z-axis is the vertical direction along the height of the printer 10, with the +Z direction pointing vertically upwards and the -Z direction pointing vertically downwards. The X, Y, and Z directions are orthogonal to each other. Paper P is an example of a recording medium. In the following description, regarding paper P, a roll of paper will be designated as roll paper PR, and a sheet of paper to be cut will be designated as single sheet paper PS, thus distinguishing between them.

[0049] exist Figure 1 The image shows a printer 10 as an example of a recording device in an embodiment. A loading device (not shown) loaded with single sheets of paper PS is provided in the +Y direction relative to the printer 10.

[0050] Printer 10 has a rectangular box 12. Furthermore, as an example, printer 10 is configured as an inkjet printer capable of printing on paper P ranging from A4 to A0 size. Printer 10 can also print on plain paper and photo paper.

[0051] Specifically, the printer 10 includes a storage section 14, a conveying section 16, a recording section 18, a cutting section 22, an ejection unit 24, and an impression plate unit 30 inside the housing 12. Furthermore, the printer 10 includes a control unit 26 that controls the operation of each part of the printer 10. As an example of the control unit 26, and also as an example of the movable wall 94 described later, the control unit 26... Figure 5 The control unit functions by controlling the rotational movement of the object.

[0052] The basket 12 has a sidewall 13 forming a wall portion in the +Y direction. An outlet 19 extending through in the Y direction is formed on the sidewall 13. The outlet 19 is sized to allow all paper P usable in the printer 10 to pass through.

[0053] The storage section 14 stores the roll of paper PR that is rotated around the central axis along the X direction.

[0054] The conveying section 16 has multiple conveying roller pairs 17. Furthermore, the conveying section 16 conveys the roll of paper PR pulled from the receiving section 14 downstream along the conveying path K, which is shown by double-dotted lines.

[0055] The recording unit 18 performs recording by spraying ink Q, as an example of droplets, onto the roll of paper PR being conveyed in the +Y direction by the transport unit 16. Furthermore, the roll of paper PR is conveyed in the +Y direction within the area opposite to the recording unit 18. Additionally, the recording unit 18 is located in the +Z direction relative to the roll of paper PR. In other words, recording is performed on the upper surface of the roll of paper PR in the +Z direction.

[0056] Furthermore, the recording unit 18 is capable of performing borderless recording on the roll paper PR. Borderless recording means recording by spraying ink Q onto the entire surface of the roll paper PR opposite to the recording unit 18.

[0057] The cutting section 22 cuts the roll of paper PR that has been recorded by the recording section 18 to form a single sheet of paper PS.

[0058] The discharge unit 24 has a support platform 25 disposed downstream of the cutting section 22 and a discharge roller pair 28. The support platform 25 supports the sheet paper PS and guides the sheet paper PS toward the discharge port 19. The discharge roller pair 28 feeds the cut sheet paper PS into the support platform 25. The sheet paper PS discharged from the discharge port 19 is conveyed to a loading device (not shown).

[0059] Next, the imprint plate unit 30 will be described.

[0060] like Figures 1 to 5 As shown, as an example, the imprint plate unit 30 includes: a support portion 32 extending in the X direction; a negative pressure chamber 38 disposed on the side opposite to the recording portion 18; a dividing portion 52 formed on the support portion 32; and a suction portion 84 formed on the support portion 32. Furthermore, the imprint plate unit 30 is provided with a discharge portion 92 for discharging air from the negative pressure chamber 38.

[0061] Support part 32 and recording part 18 Figure 1 The support portion 32 is positioned opposite the recording portion 18 in the -Z direction. As an example, the support portion 32 has a predetermined thickness in the Z direction and is formed as a rectangular plate extending in the X direction. Furthermore, as an example, the support portion 32 is made of resin. The length of the support portion 32 in the X direction is longer than the length of the largest roll of paper PR used in the printer 10 in the X direction. The length of the support portion 32 in the Y direction is longer than the length of the recording portion 18 in the Y direction. The support portion 32 constitutes the upper part of the impression plate unit 30 in the +Z direction. The support portion 32 has a support surface 34 that forms the end face of the support portion 32 in the +Z direction and an inner wall surface 36 that forms the end face of the support portion 32 in the -Z direction.

[0062] As an example, support surface 34 is a plane along the XY plane. Support surface 34 supports the roll of paper PR from the -Z direction. When viewed from the +Z direction, the shape of support surface 34 is set as a rectangle with a dimension in the X direction greater than that in the Y direction.

[0063] The inner wall surface 36 is an example of a surface that forms part of the wall surface of the negative pressure chamber 38, which will be described later, and is a flat surface along the XY plane. Furthermore, the inner wall surface 36 is formed in the support portion 32 with the support surface 34, the column portions 56 and 58 (described later), and the ribs 62, 66, 78, and 79 (which will be described later). Figure 4 The inner wall surface 36 is the surface corresponding to the position of the support surface 34, the column portions 56 and 58, and the rib portions 62, 66, 78 and 79 in the support portion 32. When viewed from the -Z direction, the inner wall surface 36 is designed to be a rectangular shape in which the dimension in the X direction is greater than the dimension in the Y direction.

[0064] As an example, the negative pressure chamber 38 is a hollow portion consisting of a bottom wall 42, a front side wall 46, a rear side wall 48, and a support portion 32, and is formed into a cylindrical shape when viewed from the X direction. The top surface of the negative pressure chamber 38 in the +Z direction is the inner wall surface 36. In this way, as an example, the negative pressure chamber 38 is constructed in a manner that includes the support portion 32. In addition, the negative pressure chamber 38 is divided into a first negative pressure chamber 39 and a second negative pressure chamber 41. Figure 5 The first negative pressure chamber 39 and the second negative pressure chamber 41 will be described later.

[0065] The bottom wall 42 is positioned in the -Z direction relative to the support portion 32. As an example, the bottom wall 42 has an upper bottom wall 43, a lower bottom wall 44 located in the -Z direction relative to the upper bottom wall 43, and a stepped portion 45. The stepped portion 45 connects the upper bottom wall 43 and the lower bottom wall 44 together in the Z direction. In other words, the central portion of the bottom wall 42 is recessed in the -Z direction.

[0066] The front side wall 46 is located at the end of the upper bottom wall 43 in the +Y direction and rises vertically in the +Z direction.

[0067] The rear sidewall 48 stands vertically in the +Z direction at the end of the upper bottom wall 43 in the -Y direction.

[0068] like Figure 3As shown, as an example of multiple dividing chambers, the dividing section 52 has a first dividing chamber 54 and a second dividing chamber 76. The first dividing chamber 54 is located in the Z direction opposite to the end of the roll of paper PR, closer to the end in the X direction than the end of the roll of paper PR. The second dividing chamber 76 is disposed in the X direction closer to the first dividing chamber 54 than the first dividing chamber 54. Furthermore, multiple first dividing chambers 54 and multiple second dividing chambers 76 are provided. Figure 3 In this diagram, only two first division chambers 54 and two second division chambers 76 are shown, while the remaining second division chambers 76 are omitted.

[0069] A recess 51 is provided at the X-direction end of the roll of paper PR in the support surface 34. Additionally, Figure 3 The diagram shows a recess 51 in the +X direction at one end of the paper roll PR and a recess 51 in the -X direction at the other end of the paper roll PR. Multiple recesses 51 in the -X direction are provided according to the length of the paper roll PR in the X direction. In other words, multiple recesses 51 provided at positions other than the reference position E described later are provided according to the position of the other end of the paper roll PR in the X direction.

[0070] The following is about... Figure 3 The dividing section 52A, which is disposed at one end, will be described. The recessed section 51 is an example of a droplet receiving section, and is a portion that is recessed from the support surface 34 in the -Z direction. As an example, the length of the recessed section 51 in the Y direction is longer than the length of the first dividing chamber 54 in the Y direction. The recessed section 51 receives ink Q when the borderless recording described above is performed on the roll paper PR.

[0071] Regarding the paper roll PR, a paper roll PR of the first size is designated as paper roll P1, and a paper roll PR of the second size with a width in the X direction greater than the first size is designated as paper roll P2, thus distinguishing them. Furthermore, in this embodiment, in the support surface 34, the position in the X direction where one end of paper roll P1 is located in the +X direction is the same as the position in the X direction where one end of paper roll P2 is located. This position in the X direction is designated as the reference position E. In this way, the conveying method in which one end of the paper roll PR is aligned with the reference position E regardless of its size is called the side alignment method.

[0072] As an example, a plurality of first dividing chambers 54 are arranged in an X-direction configuration such that the positions of their respective ends in the Y-direction are aligned in the X-direction. One of the plurality of first dividing chambers 54 is adjacent to the recess 51 in the X-direction. Specifically, it is located on the inner side in the X-direction compared to the recess 51. Furthermore, the recess 51 is positioned in the X-direction at a location including the reference position E.

[0073] The first dividing chamber 54 disposed inside the recess 51 in the X direction among the plurality of first dividing chambers 54 is designated as first dividing chamber 54A. Furthermore, as an example, the first dividing chamber 54 disposed inside first dividing chamber 54A in the X direction is designated as first dividing chamber 54B. That is, the number of first dividing chambers 54 disposed in dividing portion 52A is plurality. Figure 3 In the middle, the first partition chambers 54A and 54B are shown one by one.

[0074] As an example, the dividing section 52B is set according to the position of the end of the roll paper P1 in the X direction that becomes the other side in the -X direction.

[0075] As an example, the dividing section 52C is set according to the position of the end of the roll paper P2 in the -X direction.

[0076] As an example, the divisions 52B and 52C are structures that are symmetrical to the line of division 52A, centered on a line (not shown) along the Y direction.

[0077] like Figure 3 As shown, the first dividing chamber 54 is formed into a rectangular shape with a dimension in the Y direction larger than that in the X direction when viewed from the +Z direction. R-surfaces are formed at the four corners of the first dividing chamber 54. Furthermore, the first dividing chamber 54 has a first bottom surface 55 formed on the support portion 32 and recessed from the support surface 34 in the -Z direction.

[0078] The first bottom surface 55 is an example of a bottom surface. When viewed from the +Z direction, the shape of the first bottom surface 55 is approximately the same as the shape of the first dividing chamber 54. Furthermore, as... Figure 4 As shown, as an example, the first bottom surface 55 has two pillars 56, one pillar 58, and one rib 62, 66.

[0079] like Figure 4As shown, an inclined surface 74 is formed at the +Y end of the first dividing chamber 54. The inclined surface 74 is inclined such that its height in the +Z direction increases as it moves towards the +Y direction. Furthermore, the +Y end of the inclined surface 74 is connected to the support surface 34. As an example, the angle formed by the inclined surface 74 with respect to the first bottom surface 55 is approximately 45°. The inclined surface 74 guides the top end of the roll paper PR in the transport direction toward the support surface 34.

[0080] Two pillars 56 and one pillar 58 rise vertically from the first base 55 in the +Z direction. The +Z direction is an example of the vertical direction.

[0081] One column 56 is located upstream of the center in the Y direction in the first dividing chamber 54 in the -Y direction. The other column 56 is located downstream of the center in the Y direction in the first dividing chamber 54 in the +Y direction.

[0082] The end face of the column 56 in the +Z direction is designated as the upper surface 56A. The height of the upper surface 56A in the +Z direction is lower than the height of the support surface 34 in the +Z direction.

[0083] The column portion 58 is located in the first dividing chamber 54, in the +Y direction relative to the other column portion 56, and upstream of the downstream end in the Y direction of the first dividing chamber 54. The end face of the column portion 58 in the +Z direction is designated as the upper surface 58A. The height of the upper surface 58A in the +Z direction is lower than the height of the support surface 34 in the +Z direction. Furthermore, the column portion 58 is cylindrical by forming a first suction port 86 (described later), and the column portion 56 is cylindrical by forming a second suction port 88 (described later). In other words, the column portion 58 is an example of the wall portion of the first suction port 86. The column portion 56 is an example of the wall portion of the second suction port 88.

[0084] The outer diameter of each column 56 is smaller than the outer diameter of column 58.

[0085] The height of column 56 in the +Z direction and the height of column 58 in the +Z direction are set to approximately the same height, for example, set to about two-thirds of the depth of the first dividing chamber 54 in the Z direction.

[0086] Rib 62 is positioned in the +Y direction at a different location from the first suction port 86 and the second suction port 88 described later, and extends in the +Y direction. Specifically, rib 62 is formed as a plate with a predetermined thickness in the X direction. Furthermore, rib 62 is located closer to the -Y direction than the center of the first bottom surface 55 in the Y direction. Further, as an example, rib 62 has a ridge 63, a flat portion 64, and a ridge 65 in sequence facing the +Y direction.

[0087] The hill 63 is formed into a trapezoidal shape when viewed from the X direction. An upper surface 63A is formed at the +Z end of the hill 63. The upper surface 63A is an example of a top and is a plane along the XY plane. Furthermore, as an example, the height of the upper surface 63A in the +Z direction is aligned with the height of the support surface 34 in the +Z direction. The upper surface 63A is connected to the support surface 34.

[0088] The hill 65 is formed into a trapezoidal shape when viewed from the X direction. An upper surface 65A is formed at the +Z end of the hill 65. The upper surface 65A is an example of a top and is a plane along the XY plane. Furthermore, as an example, the height of the upper surface 65A in the +Z direction is aligned with the height of the support surface 34 in the +Z direction.

[0089] The flat portion 64 connects the mountain portion 63 and the column portion 56 in the Y direction, and connects the column portion 56 and the mountain portion 65 in the Y direction. In other words, the column portion 56 and the rib portion 62 are integrally formed. An upper surface 64A is formed at the end of the flat portion 64 in the +Z direction. The upper surface 64A is a plane along the XY plane. Furthermore, the height of the upper surface 64A in the +Z direction is the same as the height of the upper surface 56A in the +Z direction.

[0090] Rib 66 is arranged at a distance from rib 62 in the Y direction. Furthermore, rib 66 is positioned in the +Y direction at a different location from the first suction port 86 and the second suction port 88 described later, and extends in the +Y direction. Specifically, rib 66 is formed as a plate with a predetermined thickness in the X direction. Furthermore, rib 66 is located closer to the center of the first bottom surface 55 in the Y direction than in the +Y direction. Further, as an example, rib 66 has a ridge 67, a flat portion 68, a ridge 69, and a flat portion 71 sequentially facing the +Y direction.

[0091] The hill 67 is formed into a trapezoidal shape when viewed from the X direction. An upper surface 67A is formed at the +Z end of the hill 67. The upper surface 67A is an example of a top and is a plane along the XY plane. Furthermore, as an example, the height of the upper surface 67A in the +Z direction is aligned with the height of the support surface 34 in the +Z direction. The upstream end of the hill 67 in the Y direction has an inclined surface 67B.

[0092] The inclined surface 67B rises downstream in the Y direction. In other words, the +Y end of the inclined surface 67B is located in the +Z direction compared to the -Y end.

[0093] The flat portion 68 connects the hill portion 67 and another pillar portion 56 in the Y direction, and connects the other pillar portion 56 and the hill portion 69 in the Y direction. An upper surface 68A is formed at the end of the flat portion 68 in the +Z direction. The upper surface 68A is a plane along the XY plane. Furthermore, the height of the upper surface 68A in the +Z direction is the same as the height of the upper surface 56A in the +Z direction.

[0094] The hill 69 is formed into a trapezoidal shape when viewed from the X direction. An upper surface 69A is formed at the +Z end of the hill 69. The upper surface 69A is an example of a top surface and is a plane along the XY plane. Furthermore, as an example, the height of the upper surface 69A in the +Z direction is aligned with the height of the support surface 34 in the +Z direction.

[0095] The flat section 71 connects the hill section 69 and the column section 58 in the Y direction, and also connects the column section 58 and the inclined surface 74 in the Y direction. An upper surface 71A is formed at the end of the flat section 71 in the +Z direction. The upper surface 71A is a plane along the XY plane. Furthermore, the height of the upper surface 71A in the +Z direction is the same as the height of the upper surface 58A in the +Z direction.

[0096] The second dividing chamber 76 is formed into a rectangular shape with a dimension in the Y direction larger than that in the X direction when viewed from the +Z direction. As an example, the size of the second dividing chamber 76 is approximately the same as that of the first dividing chamber 54. R-surfaces are formed at the four corners of the second dividing chamber 76. Furthermore, the second dividing chamber 76 has a second bottom surface 77 formed on the support portion 32 and recessed from the support surface 34 in the -Z direction. The second bottom surface 77 is an example of a bottom surface. When viewed from the +Z direction, the shape of the second bottom surface 77 is approximately the same as that of the second dividing chamber 76. Furthermore, as an example, the second bottom surface 77 faces downstream in the Y direction and has two pillars 58 and ribs 78, 79, and 66.

[0097] An inclined surface 81 is formed at the +Y end of the second dividing chamber 76. The inclined surface 81 is inclined such that its height in the +Z direction increases as it moves towards the +Y direction. Furthermore, the +Y end of the inclined surface 81 is connected to the support surface 34. As an example, the angle formed by the inclined surface 81 relative to the second bottom surface 77 is approximately 45°. The inclined surface 81 guides the top end of the roll paper PR in the conveying direction toward the support surface 34.

[0098] Ribs 78, 79, and 66 are arranged at intervals in the Y direction.

[0099] Rib 78 is formed into a trapezoidal shape when viewed from the X direction. An upper surface 78A is formed at the +Z end of rib 78. Upper surface 78A is an example of a top surface and is a plane along the XY plane. Furthermore, as an example, the height of upper surface 78A in the +Z direction is aligned with the height of support surface 34 in the +Z direction. Upper surface 78A is connected to support surface 34.

[0100] Rib 79 is formed as an isosceles trapezoid when viewed from the X direction. An upper surface 79A is formed at the +Z end of rib 79. Upper surface 79A is an example of a top surface and is a plane along the XY plane. Furthermore, as an example, the height of upper surface 79A in the +Z direction is aligned with the height of support surface 34 in the +Z direction. The upstream end of rib 79 in the Y direction has an inclined surface 79B.

[0101] The inclined surface 79B rises downstream in the Y direction. In other words, the +Y end of the inclined surface 79B is located in the +Z direction compared to the -Y end.

[0102] The ribs 66 in the second partition chamber 76 are identical in structure to the ribs 66 in the first partition chamber 54, except that a column 58 is provided instead of the column 56 provided in the first partition chamber 54. In other words, there is no column 56 in the second partition chamber 76.

[0103] The suction section 84 connects the space S in the +Z direction, which is on the outer side compared to the support surface 34, and the negative pressure chamber 38. Furthermore, as an example of multiple suction ports, the suction section 84 has multiple first suction ports 86 and multiple second suction ports 88.

[0104] As an example, for the plurality of first suction ports 86, one is formed in the first dividing chamber 54 and two are formed in the second dividing chamber 76. The first suction port 86 is formed in the column portion 58. Furthermore, the first suction port 86 is a through hole penetrating the column portion 58 in the +Z direction. When viewed from the Z direction, which is the through direction, the shape of the first suction port 86 is set to circular. Furthermore, when viewed from the Z direction, the area of ​​a first opening of the first suction port 86 is set to SA (…). Figure 3 ).

[0105] As an example, for a plurality of second suction ports 88, two are formed in the first partition chamber 54, but none are formed in the second partition chamber 76. In the first partition chamber 54, the number of second suction ports 88 is greater than the number of first suction ports 86.

[0106] A second suction port 88 is formed in the column portion 56. Furthermore, the second suction port 88 is a through hole penetrating the column portion 56 in the +Z direction. When viewed from the Z direction, which is the through direction, the shape of the second suction port 88 is set to circular. Furthermore, when viewed from the Z direction, the area of ​​a second opening of the second suction port 88 is set to SB( Figure 3 The area of ​​the second opening, SB, is smaller than the area of ​​the first opening, SA.

[0107] The second suction port 88, which is located at the uppermost point in the +Y direction in the first dividing chamber 54, is positioned upstream in the Y direction compared to the first suction port 86, which is located at the uppermost point in the +Y direction in the second dividing chamber 76. In other words, when the X-direction end of the roll paper PR is conveyed such that it covers both the first dividing chamber 54 and the second dividing chamber 76 from the +Z direction, the second suction port 88 at the uppermost point of the first dividing chamber 54 suctions the roll paper PR before the first suction port 86 at the uppermost point of the second dividing chamber 76.

[0108] In the first partition chamber 54, when viewed from the +Z direction, the center of the first suction port 86 and the center of the second suction port 88 in the X direction, and the center of the ribs 62 and 66 in the X direction, are side by side in the +Y direction and are arranged on the same straight line (not shown).

[0109] like Figure 5 As shown, a discharge section 92 is provided at one end in the +X direction, which is one direction of the X direction of the negative pressure chamber 38. The discharge section 92 discharges air from the negative pressure chamber 38 to the outside of the negative pressure chamber 38. Additionally, as an example, the discharge section 92 has a structure in which a fan 93 is rotated by a motor (not shown). A movable wall 94 is provided in the negative pressure chamber 38 in the -X direction, which is the opposite direction to the discharge section in the X direction.

[0110] As an example, the movable wall 94 is positioned approximately at the center of the negative pressure chamber 38 in the X direction, so as to be able to rotate about an axis along the Y direction. Furthermore, the movable wall 94 is configured to stand vertically in the +Z direction by means of rotation, thereby dividing the negative pressure chamber 38 into a first negative pressure chamber 39 provided with a discharge section 92 and a second negative pressure chamber 41 without a discharge section 92.

[0111] like Figure 6 As shown, a cutout 42A extending through the bottom wall 42 in the Z direction is formed in the bottom wall 42. The cutout 42A is formed into a rectangular shape in which the dimension in the Y direction is longer than the dimension in the X direction.

[0112] The movable wall 94 is housed within the cutout portion 42A without dividing the negative pressure chamber 38. Specifically, as an example, the movable wall 94 has a shaft portion 95 and a longitudinal wall portion 96.

[0113] The shaft 95 is formed as a cylinder with the Y direction as the axis, and is configured to rotate about an axis along the Y direction by using bearings (not shown) to support both ends in the Y direction.

[0114] The longitudinal wall portion 96 is integral with the shaft portion 95 and is formed in a plate shape. Specifically, the longitudinal wall portion 96 is formed as a plate with a predetermined thickness in the Z direction when in the stored state. A protrusion 97 is formed at the +Y direction end of the longitudinal wall portion 96, protruding from the longitudinal wall portion 96 in the +Z direction. The protrusion 97 is positioned according to the Y direction position of the stepped portion 45. An R-surface 98 is formed on a portion of the bottom wall 42 to avoid contact with the rotated longitudinal wall portion 96.

[0115] like Figure 5 As shown, the movable wall 94 is implemented by the control unit 26 ( Figure 1 The rotation control is performed to switch between the storage position housed in the cutout 42A and the division position that divides the negative pressure chamber 38 which is vertically erected along the +Z direction.

[0116] Specifically, when the width of the movable wall 94 in the X direction of the roll paper PR is less than the width of the first negative pressure chamber 39 in the X direction, it rotates to the dividing position and stands upright along the +Z direction, thereby dividing the negative pressure chamber 38 into the first negative pressure chamber 39 and the second negative pressure chamber 41.

[0117] Furthermore, when the width of the movable wall 94 in the X direction of the roll paper PR is greater than the width of the first negative pressure chamber 39 in the X direction, the division between the first negative pressure chamber 39 and the second negative pressure chamber 41 is released by rotating it to the storage position.

[0118] exist Figure 5 The diagram shows a length L1 corresponding to the width of the first negative pressure chamber 39 in the X direction, a length L2 corresponding to the width of the second negative pressure chamber 41 in the X direction, and a length L3 corresponding to the width of the negative pressure chamber 38 in the X direction. L3 = L1 + L2. As an example, when the length of the roll paper PR in the X direction is shorter than the length L1, the movable wall 94 is rotated to the dividing position, thereby dividing the negative pressure chamber 38 by the movable wall 94. Furthermore, when the length of the roll paper PR in the X direction is greater than or equal to the length L1, the division of the negative pressure chamber 38 by the movable wall 94 is released by rotating the movable wall 94 to the storage position.

[0119] Next, the operation of the printer 10 in the embodiment will be explained. Furthermore, regarding the various structures of the printer 10, reference will be made to... Figures 1 to 6 Furthermore, the description of individual figure numbers is omitted.

[0120] According to the printer 10, air located on the outer side of the support portion 32 flows into the negative pressure chamber 38 through the first suction port 86 and the second suction port 88. This airflow causes the roll paper PR to be conveyed while being drawn towards the support portion 32.

[0121] Here, even if the negative pressure of the negative pressure chamber 38 is insufficient at the end of the support portion 32 in the X direction, the insufficient suction at the end of the web paper PR can be suppressed because the second suction port 88 in the first dividing chamber 54 is positioned upstream of the first suction port 86 in the second dividing chamber 76, so that the end portion is suctioned first compared to the central portion of the web paper PR in the X direction.

[0122] Furthermore, by making the opening area SB of the second suction port 88, located upstream of the first suction port 86, smaller than the opening area SA of the first suction port 86, the inflow velocity of air into the second suction port 88 is higher than that into the first suction port 86. This further suppresses insufficient suction at the X-direction end of the roll paper PR.

[0123] According to the printer 10, since the number of second suction ports 88 is greater than the number of first suction ports 86, the area where the X-direction end of the roll paper PR is sucked is increased compared to the central portion, thus suppressing the floating of the X-direction end of the roll paper PR on the support portion 32.

[0124] According to printer 10, the first suction port 86 and the second suction port 88 are each formed as a cylindrical shape extending in the +Z direction. Therefore, compared to a structure where the first suction port 86 and the second suction port 88 are formed on the support surface 34, the frequency of the generated sound is lower, making it difficult to produce a so-called whistling sound, thereby suppressing noise. Furthermore, since the height of the upper surfaces 56A and 58A in the +Z direction is lower than the height of the support surface 34 in the +Z direction, it is possible to prevent a portion of the roll of paper PR supported by the support surface 34 from being adsorbed onto the upper surfaces 56A and 58A of the columns 56 and 58.

[0125] According to the printer 10, since the roll paper PR is supported by contacting the ribs 62, 66, 78, and 79 before contacting the first bottom surface 55 and the second bottom surface 77, it is possible to prevent a portion of the conveyed roll paper PR from sagging down to the first bottom surface 55 and the second bottom surface 77.

[0126] According to the printer 10, when a portion of the roll paper PR is drawn through the first suction port 86 and the second suction port 88, since the ribs 62, 66, 78, and 79 support the roll paper PR upstream or downstream of the first suction port 86 and the second suction port 88 in the +Y direction, it is possible to prevent the portion of the conveyed roll paper PR from sagging down to the first bottom surface 55 and the second bottom surface 77.

[0127] According to the printer 10, since a portion of the roll paper PR opposite to the first dividing chamber 54 and the second dividing chamber 76 is supported by ribs 62, 66, 78, and 79 in the same way as the portion supported by the support surface 34, it is possible to suppress the roll paper PR from falling into the first dividing chamber 54 and the second dividing chamber 76.

[0128] According to the printer 10, even if a portion of the roll paper PR falls toward the first bottom surface 55 and the second bottom surface 77, the roll paper PR is guided by contact with the inclined surfaces 67B and 79B, thereby raising the height position of the roll paper PR. Therefore, it is possible to prevent the portion of the roll paper PR from getting stuck on the ribs 62, 66, and 79.

[0129] According to the printer 10, when an external force is applied to the columns 56 and 58, the strength of the columns 56 and 58 can be improved because the ribs 62 and 66 support the columns 56 and 58.

[0130] According to the printer 10, by making a portion of the inner wall surface 36 of the negative pressure chamber 38 flat, the pressure loss in the negative pressure chamber 38 is reduced compared to a structure with protrusions formed on the inner wall surface 36, thus suppressing the decrease in suction force in the first suction port 86 and the second suction port 88.

[0131] Furthermore, since the portion of the support portion 32 that is on the outer side of the portion opposite to the inner wall surface 36 becomes a protrusion protruding from the first bottom surface 55 and the second bottom surface 77, the support portion 32 can be easily formed.

[0132] According to the printer 10, since one end of the roll paper PR in the X direction is attracted to the support portion 32 at the reference position E, the support portion 32 can support one end of the roll paper PR in the X direction even if the size of the roll paper PR is changed.

[0133] According to the printer 10, since the first dividing chamber 54 is provided in multiple ways according to the position of the other end of the roll paper PR in the X direction, it is possible to support both ends of the roll paper PR in the X direction even if the size of the roll paper PR is changed.

[0134] According to the printer 10, when a small roll of paper PR is being conveyed in one direction biased towards the X direction, by providing a discharge section 92 in one direction of the X direction in the negative pressure chamber 38, the end of the small roll of paper PR can be effectively sucked up.

[0135] According to the printer 10, when the width of the roll paper PR in the X direction is less than or equal to the width of the first negative pressure chamber 39 in the X direction, the pressure drop in the first negative pressure chamber 39 is suppressed because the negative pressure chamber 38 is divided by the movable wall 94, thus suppressing the roll paper PR from floating.

[0136] On the other hand, when the width of the roll paper PR in the X direction is greater than the width of the first negative pressure chamber 39 in the X direction, since the division of the negative pressure chamber 38 by the movable wall 94 is released, the suction of the roll paper PR can also be performed at the part corresponding to the second negative pressure chamber 41. Therefore, even if the roll paper PR is a large size, the floating of the end of the roll paper PR in the X direction can be suppressed.

[0137] Variations

[0138] Next, with reference to the accompanying drawings, a modified example of a recording device, the printer 100, will be described. Furthermore, parts common to the printer 10 will be marked with the same symbols, and their descriptions will be omitted.

[0139] exist Figure 7 The image shows a portion of the printing plate unit 110 of the printer 100. Additionally, in... Figure 7 The image shows a portion of the printing plate unit 110 corresponding to the other end of the roll paper PR, for example, the position corresponding to the dividing section 52B. As an example, the dividing section 52B has a structure that is symmetrical to the dividing section 52A about a line (not shown) along the Y direction.

[0140] Printer 100 is set to be in printer 10 ( Figure 1 In the printer 100, the imprint plate unit 110 is replaced by the imprint plate unit 30. That is to say, in the printer 100, the structure other than the imprint plate unit 110 is the same as that of the printer 10.

[0141] The imprint plate unit 110 differs in that, in the imprint plate unit 30 ( Figure 1 The unit also includes a third partition chamber 112 and a fourth partition chamber 122. The other structures are the same as those of the imprint plate unit 30.

[0142] As an example, the third dividing chamber 112 is positioned downstream in the Y direction relative to the first dividing chamber 54 adjacent to the recess 51. The length of the third dividing chamber 112 in the Y direction is shorter than the length of the first dividing chamber 54 in the Y direction. Furthermore, the third dividing chamber 112 has a bottom surface 114 that is recessed from the support surface 34 in the -Z direction. An inclined surface 74 is formed at the end of the third dividing chamber 112 in the +Y direction.

[0143] As an example, the bottom surface 114 has two pillars 116 and one rib 118.

[0144] The two pillars 116 are formed as cylinders that stand vertically from the bottom surface 114 in the +Z direction. The two pillars 116 are located at both ends in the Y direction of the third dividing chamber 112. Furthermore, the two pillars 116 are offset in the -X direction relative to the extension line (not shown) of the rib 66 extending in the Y direction.

[0145] The end face of the column portion 116 in the +Z direction is designated as the upper surface 116A. The height of the upper surface 116A in the +Z direction is the same as the height of the support surface 34 in the +Z direction. A third suction port 117 is formed in the column portion 116, penetrating the column portion 116 in the Z direction.

[0146] When viewed from the Z direction, as an example, the opening area SC of the third suction port 117 is the same as the opening area SB of the second suction port 88.

[0147] Rib 118 is formed as a plate with a predetermined thickness in the X direction and extends along the Y direction. Furthermore, rib 118 connects two pillars 116 in the Y direction. Further, rib 118 is offset in the -X direction relative to the aforementioned extension line of rib 66.

[0148] In this manner, the two pillars 116 and the ribs 118 are offset in the -X direction relative to the center of the third dividing chamber 112. In other words, the two pillars 116 and the ribs 118 are arranged in the third dividing chamber 112 in a manner close to the X-direction end of the recess 51 or the roll paper PR.

[0149] As an example, the fourth dividing chamber 122 is positioned downstream in the Y direction relative to the first dividing chamber 54 and the second dividing chamber 76, which are not adjacent to the recess 51. The length of the fourth dividing chamber 122 in the Y direction is approximately equal to the length of the third dividing chamber 112 in the Y direction. Furthermore, the fourth dividing chamber 122 has a bottom surface 124 that is recessed from the support surface 34 in the -Z direction. An inclined surface 74 is formed at the end of the fourth dividing chamber 122 in the +Y direction.

[0150] As an example, the bottom surface 124 has two pillars 116 and one rib 118 with a third suction port 117 formed thereon. Furthermore, in the fourth partition chamber 122, the two pillars 116 and the rib 118 are arranged on the extension line of the rib 62 described above. That is, the X-direction arrangement of the two pillars 116 and the rib 118 differs in the third partition chamber 112 and the fourth partition chamber 122.

[0151] In the printer 100, by positioning the third suction port 117 in the third dividing chamber 112 close to the X-direction end of the roll paper PR, it is easy to draw the X-direction end of the roll paper PR passing through the first dividing chamber 54 onto the support portion 32.

[0152] Although the printers 10 and 100 described in the embodiments and variations of the present invention are printers based on the structure described above, it is self-evident that some structural changes or omissions can be made without departing from the spirit of the present invention.

[0153] In printers 10 and 100, the number of second suction ports 88 may be less than or equal to the number of first suction ports 86. On each of the first bottom surface 55 and the second bottom surface 77, the total number of pillars 56 and 58 may be one or four. The height of the upper surfaces 56A and 58A may be equal to the height of the support surface 34. On each of the first bottom surface 55 and the second bottom surface 77, the number of ribs formed may be one or more. Furthermore, multiple ribs may be arranged in the X direction. Alternatively, no ribs may be formed on the first bottom surface 55 and the second bottom surface 77.

[0154] The center of the first suction port 86 and the second suction port 88 in the X direction, and the center of the ribs 62, 66, 78, and 79 in the X direction, may also be offset in the X direction. The height of the top of the ribs 62, 66, 78, and 79 may also be lower than the height of the support surface 34. Rib 66 may also not have an inclined surface 67B. Rib 79 may also not have an inclined surface 79B.

[0155] The columns 56 and 58 and the ribs 62 and 66 can also be formed separately.

[0156] A portion of the inner wall surface 36 may also be formed with a protruding part facing inward.

[0157] The first dividing chamber 54 may also be non-adjacent to the recess 51 in the X direction. Furthermore, the first dividing chamber 54 may be offset in the X direction relative to the reference position E. The number of first dividing chambers 54 disposed on the other side relative to the reference position E may also be one.

[0158] The discharge section 92 can also be disposed on the side wall of the negative pressure chamber 38.

[0159] The movable wall 94 only needs to ensure the suction state of the roll paper PR, and even small roll paper PR can be arranged in the storage position. In addition, the movable wall 94 is not limited to a rotating movable wall, but can also be a movable wall that slides in the Z direction.

[0160] The recording unit 18 can be either a serial recording head or a line recording head. The arrangement of the paper P is not limited to a side alignment arrangement that positions the paper P close to the +X or -X direction, but can also be a center alignment arrangement that aligns the center of the device in the X direction with the center of the paper P.

[0161] Symbol Explanation

[0162] 10…Printer; 12…Carrier; 13…Side wall; 14…Storage section; 16…Conveying section; 17…Conveying roller pair; 18…Recording section; 19…Discharge port; 22…Cutting section; 24…Discharge unit; 25…Support platform; 26…Control section; 28…Discharge roller pair; 30…Impression plate unit; 32…Support section; 34…Support surface; 36…Inner wall surface; 38…Negative pressure chamber; 39…First negative pressure chamber; 41…Second negative pressure chamber; 42…Bottom wall; 42A…Slit section; 43…Upper bottom wall; 44… 45…lower bottom wall; 46…stepped section; 48…front side wall; 51…rear side wall; 52A…recess; 52B…division section; 52C…division section; 54…first division chamber; 54A…first division chamber; 54B…first division chamber; 55…first bottom surface; 56…column; 56A…upper surface; 58…column; 58A…upper surface; 62…rib; 63…mountain; 63A…upper surface; 64…flat section; 64A…upper surface; 65…mountain; 65A…upper surface; 6 6…rib; 67…mountain; 67A…upper surface; 67B…sloping surface; 68…flat section; 68A…upper surface; 69…mountain; 69A…upper surface; 71…flat section; 71A…upper surface; 74…sloping surface; 76…second dividing chamber; 77…second bottom surface; 78…rib; 78A…upper surface; 79…rib; 79A…upper surface; 79B…sloping surface; 81…sloping surface; 84…suction section; 86…first suction port; 88…second suction port; 92…discharge section; 93… Fan; 94…Modible wall; 95…Shaft; 96…Vertical wall; 97…Protrusion; 98…R surface; 100…Printer; 110…Impression plate unit; 112…Third dividing chamber; 114…Bottom surface; 116…Column; 116A…Upper surface; 117…Third suction port; 118…Rib; 122…Fourth dividing chamber; 124…Bottom surface; L1…Length; L2…Length; L3…Length; P…Paper; P1…Roll paper; P2…Roll paper; PR…Roll paper; PS…Single sheet paper.

Claims

1. A recording apparatus characterized by comprising: Possessing: a recording section that performs recording on a recording medium being conveyed in a conveying direction; a supporting section that is disposed in opposition to the recording section and has a supporting surface that supports the recording medium; a negative pressure chamber that is disposed on the opposite side from the recording section with respect to the supporting section; a plurality of divided chambers that are formed on the supporting section and have a bottom surface that is recessed from the supporting surface and are disposed in a width direction that intersects the conveying direction; a plurality of suction ports that are formed on the supporting section and communicate a space on the outer side compared to the supporting surface with the negative pressure chamber, the plurality of divided chambers have at least one first divided chamber that opposes the recording medium at a position on the inner side compared to an end portion of the recording medium in the width direction and closest to the end portion and at least one second divided chamber that is disposed on the inner side compared to the first divided chamber in the width direction, the plurality of suction ports have at least one first suction port and at least one second suction port that has a second opening area that is smaller compared to a first opening area of the first suction port, the second suction port that is disposed at the most upstream in the conveying direction in the first divided chamber is disposed at the upstream in the conveying direction compared to the first suction port that is disposed at the most upstream in the conveying direction in the second divided chamber.

2. The recording apparatus according to claim 1, wherein the number of the second suction ports is greater than the number of the first suction ports.

3. The recording apparatus according to claim 1 or claim 2, wherein the bottom surface has at least one column portion that vertically stands up from the bottom surface, an upper surface of the column portion in a vertical standing direction has a height that is lower than a height of the supporting surface in the vertical standing direction, the plurality of suction ports are through holes that pass through the column portion in the vertical standing direction.

4. The recording apparatus according to claim 1, wherein the bottom surface has at least one rib portion that is disposed at a position different from the suction port in the conveying direction and extends in the conveying direction.

5. The recording apparatus according to claim 4, wherein a center in the width direction of the suction port and a center in the width direction of the rib portion are disposed side by side in the conveying direction.

6. The recording apparatus according to claim 4 or claim 5, wherein at least a portion of a top of the rib portion has a height that aligns with a height of the supporting surface.

7. The recording apparatus according to claim 4, wherein an end portion of the rib portion on the upstream in the conveying direction has an inclined surface that rises toward the downstream.

8. The recording apparatus according to claim 4, wherein a wall portion of the suction port and the rib portion are integrally formed.

9. The recording apparatus according to claim 8, wherein the supporting section has an inner wall surface that is a portion of a wall surface that forms the negative pressure chamber, In the support portion, the inner wall surface corresponding to the positions of the wall portion in which the support surface and the suction port are formed and the rib portion is a flat surface.

10. The recording apparatus according to claim 1, wherein the recording section performs recording by ejecting a liquid droplet toward the recording medium, a liquid droplet receiving portion is provided at a position of an end portion of the recording medium in the width direction in the support surface, the liquid droplet receiving portion receiving the liquid droplet in a case where the recording medium is subjected to borderless recording, the first division chamber is adjacent to the liquid droplet receiving portion in the width direction.

11. The recording apparatus according to claim 10, wherein the liquid droplet receiving portion is provided at a reference position at which one end of the recording medium in the width direction is located in the support surface.

12. The recording apparatus according to claim 11, wherein the recording section is configured to be capable of performing recording on the recording medium of a plurality of sizes different in width in the width direction, the liquid droplet receiving portion provided at a position other than the reference position is provided with a plurality of liquid droplet receiving portions according to the position of the other end of the recording medium in the width direction.

13. The recording apparatus according to claim 1, wherein one discharge portion that discharges air of the negative pressure chamber is provided at one end portion of the negative pressure chamber in the width direction.

14. The recording apparatus according to claim 13, wherein a movable wall that divides the negative pressure chamber into a first negative pressure chamber in which the discharge portion is provided and a second negative pressure chamber in which the discharge portion is not provided is provided at a side opposite to the side in which the discharge portion is present in the negative pressure chamber in the width direction, the movable wall divides the negative pressure chamber into the first negative pressure chamber and the second negative pressure chamber in a case where the width of the recording medium in the width direction is equal to or smaller than the width of the first negative pressure chamber in the width direction, the division of the first negative pressure chamber and the second negative pressure chamber is released in a case where the width of the recording medium in the width direction is greater than the width of the first negative pressure chamber in the width direction.

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