Recording device

Abstract

To solve the problem of shortage of negative pressure in a negative pressure chamber in an end part in a width direction of a recording medium when suction is performed in a central portion in the width direction of the recording medium.SOLUTION: A printer 10 includes a recording portion 18, a support portion 32, a negative pressure chamber 38, a first compartment 54, a second compartment 76, a first suction port 86 and a second suction port 88. The support part 32 lies opposite the recording portion 18 and has a supporting surface 34 for supporting a roll sheet PR. The negative pressure chamber 38 is arranged on the opposite side of the recording portion 18 side with respect to the support portion 32. The first compartment 54 and the second compartment 76 have a first bottom surface 55 and a second bottom surface 77. The first suction port 86 and the second suction port 88 connects an outside space and the negative pressure chamber 38 in communication. An opening area SB of the second suction port 88 is smaller than an opening area SA of the first suction part 88. The second suction port 88 positioned furthest upstream in the first compartment 54 is positioned on the upstream side, in the carrying direction, of the first suction port 86, which is positioned furthest upstream in the second compartment 76.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a recording apparatus. [Background technology]

[0002] The liquid ejecting device described in Patent Document 1 includes a suction device and a platen having a plurality of grooves aligned in the width direction of the medium. Each of the grooves has a hole formed therein for sucking the medium. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-22897 A Summary of the Invention [Problem to be solved by the invention]

[0004] When suction is performed in the center of the medium in the width direction, as in the liquid ejecting device of Patent Document 1, there is a risk that the negative pressure in the negative pressure chamber will be insufficient at the ends of the medium in the width direction. [Means for solving the problem]

[0005] In order to solve the above problem, a recording device according to the present invention includes a recording unit that records on a recording medium transported in a transport direction, a support unit that is arranged opposite the recording unit and has a support surface that supports the recording medium, a negative pressure chamber that is arranged on the opposite side of the support unit from the recording unit side, a plurality of partitioned chambers that are formed in the support unit and have bottom surfaces recessed from the support surface and are arranged in a width direction that intersects with the transport direction, and a plurality of suction ports that are formed in the support unit and connect a space outside the support surface to the negative pressure chamber, and the plurality of partitioned chambers are arranged inside an end of the recording medium in the width direction. the recording medium is conveyed by a conveyor belt having a conveying direction that is inversely proportional to the width of the recording medium; and at least one second chamber arranged inward in the width direction from the first chamber, the plurality of suction ports having at least one first suction port and at least one second suction port having a second opening area smaller than a first opening area of ​​the first suction port, and the second suction port arranged most upstream in the first chamber in the conveying direction is arranged upstream in the conveying direction from the first suction port arranged most upstream in the second chamber in the conveying direction. [Brief description of the drawings]

[0006] [Figure 1] FIG. 1 is a diagram showing the overall configuration of a printer according to an embodiment. [Diagram 2] FIG. 4 is a perspective view showing the inside of a platen unit in the printer according to the embodiment. [Diagram 3] FIG. 4 is a plan view illustrating a schematic view of a portion of a platen unit in the printer according to the embodiment. [Figure 4] FIG. 2 is an enlarged perspective view of a portion of a platen unit in the printer according to the embodiment. [Diagram 5] FIG. 2 is a vertical cross-sectional view showing the internal structure of a platen unit in the printer according to the embodiment. [Figure 6] FIG. 4 is a perspective view showing the inside lower part of a platen unit in the printer according to the embodiment. [Figure 7] FIG. 11 is an enlarged partial plan view of a platen unit in a printer according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] Hereinafter, recording devices according to the first to fourteenth aspects of the present invention will be briefly described. A recording device according to a first aspect of the present invention for solving the above problem includes a recording unit which records on a recording medium transported in a transport direction, a support unit which is disposed opposite the recording unit and has a support surface which supports the recording medium, a negative pressure chamber which is disposed on the opposite side of the support unit from the recording unit side, a plurality of partitioned chambers which are formed in the support unit and have bottom surfaces recessed from the support surface and which are disposed in a width direction which intersects with the transport direction, and a plurality of suction ports which are formed in the support unit and which connect a space outside the support surface with the negative pressure chamber, The recording medium has at least one first compartment facing the recording medium at a position on the inside closest to the end, and at least one second compartment arranged on the inside in the width direction of the first compartment, the multiple suction ports have at least one first suction port and at least one second suction port having a second opening area smaller than a first opening area of ​​the first suction port, and the second suction port arranged most upstream in the transport direction in the first compartment is arranged upstream in the transport direction of the first suction port arranged most upstream in the transport direction in the second compartment. According to this aspect, air outside the support portion flows into the negative pressure chamber through at least one of the first suction ports and at least one of the second suction ports. The recording medium is transported while being attracted to the support portion by this air flow. Here, even if the negative pressure in the negative pressure chamber is insufficient at the widthwise end of the support portion, since the second suction port in the first compartment is positioned upstream of the first suction port in the second compartment, suction begins at the end before the center of the widthwise portion of the recording medium, thereby preventing insufficient suction at the widthwise end of the recording medium. Furthermore, since the opening area of ​​the second suction port located upstream of the first suction port is smaller than the opening area of ​​the first suction port, the inflow speed of the air flowing into the second suction port is higher than the inflow speed of the air flowing into the first suction port, which further prevents insufficient suction at the ends of the recording medium in the width direction.

[0008] The recording apparatus according to a second aspect is the recording apparatus according to the first aspect, wherein the number of the second suction ports is greater than the number of the first suction ports. According to this aspect, the number of areas where the ends in the width direction of the recording medium are sucked is increased compared to the central portion, so that it is possible to suppress lifting of the ends in the width direction of the recording medium from the support portion.

[0009] The recording device of the third aspect is characterized in that, in the first or second aspect, the bottom surface has at least one pillar portion standing upright from the bottom surface, the height of the upper surface of the pillar portion in the upright direction is lower than the height of the support surface in the upright direction, and the multiple suction ports are through holes that penetrate the pillar portion in the upright direction. According to this aspect, the plurality of suction ports are each formed in a cylindrical shape extending in the upright direction. This reduces the frequency of the generated sound compared to a configuration in which the plurality of suction ports are formed on the support surface, making it difficult for the so-called whistling phenomenon to occur and reducing noise. Furthermore, since the height of the upper surface is lower than the height of the support surface, it is possible to prevent a part of the recording medium supported on the support surface from being adsorbed to the upper surface of the column.

[0010] The recording device of the fourth aspect is any one of the first to third aspects, characterized in that the bottom surface has at least one rib that is provided at a position different from the suction port in the transport direction and extends in the transport direction. According to this aspect, the recording medium is supported by contacting the ribs before contacting the bottom surface, so that it is possible to prevent a portion of the recording medium being transported from sagging down to the bottom surface.

[0011] A recording apparatus according to a fifth aspect is the recording apparatus according to the fourth aspect, characterized in that a center of the suction port in the width direction and a center of the rib in the width direction are arranged side by side in the transport direction. According to the present aspect, when a portion of the recording medium is sucked by the suction port, the rib supports the recording medium upstream or downstream of the suction port in the transport direction, thereby preventing the portion of the recording medium being transported from sagging down to the bottom surface.

[0012] The recording device according to a sixth aspect is the recording device according to the fourth or fifth aspect, characterized in that the height of at least a part of the top of the rib is aligned with the height of the support surface. According to this aspect, the portion of the recording medium facing the compartment is supported by the rib in the same manner as the portion supported by the support surface, thereby preventing the recording medium from falling into the compartment.

[0013] The recording device according to the seventh aspect is any one of the fourth to sixth aspects, characterized in that the upstream end of the rib in the transport direction has an inclined surface that rises toward the downstream. According to this aspect, even if a portion of the recording medium falls toward the bottom surface of the compartment, the portion of the recording medium is guided by contact with the inclined surface and the height position of the recording medium rises, thereby preventing the portion of the recording medium from getting caught on the rib.

[0014] The recording device according to an eighth aspect is any one of the fourth to seventh aspects, characterized in that a wall portion of the suction port and the rib are integrally formed. According to this aspect, when an external force acts on the wall portion of the suction port, the ribs support the wall portion, thereby increasing the strength of the wall portion of the suction port.

[0015] A ninth aspect of the recording device 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 in the support portion, the inner wall surface corresponding to the position where the support surface, the wall portion of the suction port, and the rib are formed is a flat surface. According to the present aspect, by forming a portion of the inner wall surface of the negative pressure chamber as a flat surface, the pressure loss in the negative pressure chamber is reduced compared to a configuration in which a convex portion is formed on the inner wall surface, thereby preventing a decrease in the suction force at the suction port. Furthermore, in the support portion, the portion opposite the flat surface becomes a convex portion protruding from the bottom surface, which makes it easier to mold the support portion.

[0016] The recording device of the 10th aspect is any one of the 1st to 9th aspects, characterized in that the recording unit performs recording by ejecting droplets onto the recording medium, and a droplet receiving unit is provided at an end portion of the recording medium in the width direction on the support surface for receiving the droplets when borderless recording is performed on the recording medium, and the first compartment is adjacent to the droplet receiving unit in the width direction.

[0017] The recording device according to an eleventh aspect is the recording device according to the tenth aspect, characterized in that the droplet receiving portion is provided at a reference position on the support surface where one end of the recording medium in the width direction is located. According to this aspect, at the reference position, one end of the recording medium in the width direction is attracted to the support portion, so that even if the size of the recording medium is changed, the one end of the recording medium in the width direction can be supported by the support portion.

[0018] The recording device of the 12th aspect is characterized in that, in the 11th aspect, the recording unit is capable of recording on a plurality of sizes of recording media having different widths in the width direction, and the droplet receiving unit is provided at a position other than the reference position, and is provided in plurality to match the position of the other end of the recording medium in the width direction. According to this aspect, even if the size of the recording medium is changed, both ends of the recording medium in the width direction can be supported.

[0019] The recording device according to the thirteenth aspect is any one of the first to twelfth aspects, characterized in that an exhaust section for exhausting air from the negative pressure chamber is provided at one end of the negative pressure chamber in the width direction. According to this aspect, when the small-sized recording medium is transported with a bias to one side in the width direction, by providing one discharge section on one side of the width direction of the negative pressure chamber, the end of the small-sized recording medium can be efficiently sucked in.

[0020] A recording device according to a 14th aspect is the 13th aspect, wherein a movable wall is provided on the other side of the discharge portion in the width direction of the negative pressure chamber, capable of dividing 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, and 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 equal to or less than the width of the first negative pressure chamber, and releases the partition between 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. According to this aspect, when the width in the width direction of the recording medium is equal to or less than the width in the width direction of the first negative pressure chamber, the negative pressure chamber is partitioned by the movable wall, thereby suppressing a drop in pressure in the first negative pressure chamber, and thereby preventing the recording medium from floating up. On the other hand, when the width of the recording medium in the width direction is larger than the width of the first negative pressure chamber, the partition of the negative pressure chamber by the movable wall is released and the recording medium can be sucked even in the portion corresponding to the second negative pressure chamber, so that even if the recording medium is large in size, the ends of the recording medium in the width direction can be prevented from floating up.

[0021] An example of the recording apparatus of the present invention will now be described in detail. In each figure, the X direction along the X axis is an example of the device width direction of the printer 10 and the width direction of a recording medium, which will be described later. The -X direction is the left direction as seen by a user when the front of the device faces the user, and the +X direction is the right direction. The Y direction along the Y axis is an example of the device depth direction of the printer 10. The +Y direction is the direction from the rear to the front of the device, and is an example of the transport direction of paper P and roll paper PR in the platen unit 30, which will be described later. The -Y direction is the direction from the front to the rear of the device. The X and Y directions are horizontal directions. The Z direction along the Z axis is the device height direction and vertical direction of the printer 10, the +Z direction is vertically upward, and the -Z direction is vertically downward. The X direction, Y direction, and Z direction are perpendicular to each other. Paper P is an example of a recording medium. In the following description, paper P in a roll state will be referred to as roll paper PR, and cut sheets will be referred to as cut papers PS.

[0022] 1 shows a printer 10 as an example of a recording apparatus in an embodiment. A loading device (not shown) on which cut papers PS are loaded is provided in the +Y direction relative to the printer 10. The printer 10 has a rectangular parallelepiped housing 12. The printer 10 is configured as an inkjet printer capable of printing on paper P ranging in size from A4 to A0, for example. The printer 10 is capable of recording on both plain paper and photo paper.

[0023] Specifically, the printer 10 includes, inside the housing 12, a storage unit 14, a transport unit 16, a recording unit 18, a cutting unit 22, a discharge unit 24, and a platen unit 30. The printer 10 is also provided with a control unit 26 that controls the operation of each unit of the printer 10. As an example, the control unit 26 also functions as a control unit that controls the rotational operation of a movable wall 94 (FIG. 5) described below.

[0024] The housing 12 has a side wall 13 that constitutes the +Y direction wall of the housing 12. An outlet 19 that penetrates the side wall 13 in the Y direction is formed. The outlet 19 has a size that allows all paper sheets P that can be used in the printer 10 to pass through. The storage section 14 stores roll paper PR which is rotated around a central axis along the X direction. The transport section 16 has a plurality of transport roller pairs 17. The transport section 16 also transports the roll paper PR pulled out of the storage section 14 downstream along a transport path K indicated by a two-dot chain line.

[0025] The recording unit 18 performs recording by ejecting ink Q, an example of liquid droplets, onto the roll paper PR that is transported in the +Y direction by the transport unit 16. The roll paper PR is transported in the +Y direction in an area facing the recording unit 18. The recording unit 18 is located in the +Z direction relative to the roll paper PR. In other words, recording is performed on the top surface of the roll paper PR in the +Z direction. The recording unit 18 is also capable of performing borderless recording on the roll paper PR. Borderless recording refers to recording in which ink Q is ejected onto the entire surface of the roll paper PR that faces the recording unit 18.

[0026] The cutting unit 22 cuts the roll paper PR recorded by the recording unit 18 into cut papers PS. The discharge unit 24 has a support table 25 located downstream from the cutting section 22, and a pair of discharge rollers 28. The support table 25 supports the cut sheets PS and guides the cut sheets PS to the discharge outlet 19. The pair of discharge rollers 28 feed the cut cut sheets PS into the support table 25. The cut sheets PS discharged from the discharge outlet 19 are transported to a loading device (not shown).

[0027] Next, the platen unit 30 will be described. 1 to 5, the platen unit 30, for example, includes a support portion 32 extending in the X direction, a negative pressure chamber 38 disposed on the opposite side of the recording portion 18 from the recording portion 18 side, a partition portion 52 formed in the support portion 32, and a suction portion 84 formed in the support portion 32. Furthermore, the platen unit 30 is provided with an exhaust portion 92 that exhausts air from the negative pressure chamber 38.

[0028] The support part 32 faces the recording part 18 (FIG. 1) and is disposed in the -Z direction from the recording part 18. As an example, the support part 32 has a certain thickness in the Z direction and is formed in the shape of a rectangular plate extending in the X direction. As an example, the support part 32 is made of resin. The length in the X direction of the support part 32 is longer than the length in the X direction of the largest size roll paper PR among the roll papers PR used in the printer 10. The length in the Y direction of the support part 32 is longer than the length in the Y direction of the recording part 18. The support part 32 constitutes the upper part of the platen unit 30 in the +Z direction. The support part 32 has a support surface 34 that is the end face of the support part 32 in the +Z direction, and an inner wall surface 36 that is the end face of the support part 32 in the -Z direction.

[0029] As an example, the support surface 34 is a flat surface along the XY plane. The support surface 34 supports the roll paper PR from the -Z direction. When viewed from the +Z direction, the outer shape of the support surface 34 is a rectangle whose dimension in the X direction is greater than its dimension in the Y direction. The inner wall surface 36 is an example of a surface forming a part of the wall surface of the negative pressure chamber 38 described later, and is a flat surface along the XY plane. The inner wall surface 36 is a surface of the support portion 32 corresponding to the position where the support surface 34, the pillar portions 56, 58, and the ribs 62, 66, 78, 79 (FIG. 4) described later are formed. In other words, the inner wall surface 36 is a surface of the support portion 32 located on the opposite side to the portion where the support surface 34, the pillar portions 56, 58, and the ribs 62, 66, 78, 79 are formed. When viewed from the -Z direction, the outer shape of the inner wall surface 36 is a rectangle whose dimension in the X direction is larger than its dimension in the Y direction.

[0030] The negative pressure chamber 38 is, for example, a hollow portion composed of a bottom wall 42, a front wall 46, a rear wall 48, and a support portion 32, and is formed in a rectangular tube shape when viewed from the X direction. The ceiling surface of the negative pressure chamber 38 in the +Z direction is the inner wall surface 36. Thus, the negative pressure chamber 38 is, for example, configured to include the support portion 32. The negative pressure chamber 38 is divided into a first negative pressure chamber 39 and a second negative pressure chamber 41 (FIG. 5). The first negative pressure chamber 39 and the second negative pressure chamber 41 will be described later.

[0031] The bottom wall 42 is disposed in the -Z direction relative to the support portion 32. The bottom wall 42 has, as an example, an upper bottom wall 43, a lower bottom wall 44 located in the -Z direction from the upper bottom wall 43, and a step portion 45. The step portion 45 connects the upper bottom wall 43 and the lower bottom wall 44 in the Z direction. In other words, the center portion of the bottom wall 42 is recessed in the -Z direction. The front side wall 46 stands upright in the +Z direction at the end of the upper bottom wall 43 in the +Y direction. The rear side wall 48 stands upright in the +Z direction at the end of the upper bottom wall 43 in the -Y direction.

[0032] 3, the partition section 52 has, as an example of multiple partitions, a first partitioned chamber 54 that faces the roll paper PR in the Z direction at a position closest to and inside the end of the roll paper PR in the X direction, and a second partitioned chamber 76 that is positioned inside the first partitioned chamber 54 in the X direction. There are multiple first partitioned chambers 54 and multiple second partitioned chambers 76. In FIG. 3, only two first partitioned chambers 54 and two second partitioned chambers 76 are shown, and the remaining second partitioned chambers 76 are not shown.

[0033] A recess 51 is provided on the support surface 34 at the end of the roll paper PR in the X direction. Note that Fig. 3 shows a recess 51 at one end of the roll paper PR in the +X direction, and a recess 51 at the other end of the roll paper PR in the -X direction. Multiple recesses 51 at the -X direction end are provided according to the length of the roll paper PR in the X direction. In other words, multiple recesses 51 are provided at positions other than reference position E, which will be described later, to match the position of the other end of the roll paper PR in the X direction. The partition 52A located at one end will be described below with reference to Fig. 3. The recess 51 is an example of a droplet receiving portion, and is a portion recessed in the -Z direction from the support surface 34. As an example, the length of the recess 51 in the Y direction is longer than the length of the first partition chamber 54 in the Y direction. The recess 51 receives ink Q when the previously described borderless recording is performed on the roll paper PR.

[0034] The roll paper PR is classified into a first size as roll paper P1 and a second size, which is wider in the X direction than the first size, as roll paper P2. In this embodiment, the position in the X direction where one end of the +X direction of roll paper P1 is located and the position in the X direction where one end of the +X direction of roll paper P2 is located are the same on the support surface 34. This position in the X direction is referred to as the reference position E. This transport method in which one end of the X direction is aligned to the reference position E regardless of the size of the roll paper PR is referred to as a side registration method.

[0035] As an example, the multiple first compartments 54 are arranged side by side in the X direction such that both ends in the Y direction are aligned in the X direction. Of the multiple first compartments 54, one first compartment 54 is adjacent to the recessed portion 51 in the X direction. Specifically, the recessed portion 51 is located inside the recessed portion 51 in the X direction. The recessed portion 51 is provided at a position including the reference position E in the X direction.

[0036] Of the multiple first compartments 54, the one provided inside the recessed portion 51 in the X direction is referred to as a first compartment 54A. As an example, the one provided at a position inside the first compartment 54A in the X direction is referred to as a first compartment 54B. That is, a plurality of first compartments 54 are provided in the compartment 52A. In FIG. 3, one each of the first compartments 54A and 54B are shown. As an example, the partition section 52B is provided to align with the position of the other end of the roll paper P1 in the -X direction, which is the other end in the X direction. As an example, the partition section 52C is provided to align with the position of the end of the roll paper P2 in the -X direction. As an example, the partitions 52B and 52C are configured to be line-symmetrical to the partition 52A with respect to a line (not shown) extending in the Y direction.

[0037] 3, the first compartment 54 is formed in a rectangular shape with a dimension in the Y direction greater than a dimension in the X direction when viewed from the +Z direction. R-shaped surfaces are formed at four corners of the first compartment 54. The first compartment 54 also has a first bottom surface 55 that is formed in the support portion 32 and recessed from the support surface 34 in the -Z direction. The first bottom surface 55 is an example of a bottom surface. When viewed from the +Z direction, the outer shape of the first bottom surface 55 is substantially the same as the outer shape of the first compartment 54. As shown in FIG. 4, the first bottom surface 55 has, as an example, two pillar portions 56, one pillar portion 58, and one each of ribs 62 and 66.

[0038] 4, a slope 74 is formed at the end of the first compartment 54 in the +Y direction. The slope 74 is inclined so that its height in the +Z direction increases as it approaches the +Y direction. The end of the slope 74 in the +Y direction is connected to the support surface 34. The angle that the slope 74 makes with the first bottom surface 55 is, for example, about 45°. The slope 74 guides the leading end of the roll paper PR in the transport direction to the support surface 34.

[0039] The two pillars 56 and the one pillar 58 stand upright in the +Z direction from the first bottom surface 55. The +Z direction is an example of an upright direction. One pillar portion 56 is located in the -Y direction, i.e., upstream in the Y direction, from the center in the Y direction of the first compartment 54. The other pillar portion 56 is located in the +Y direction, i.e., downstream in the Y direction, from the center in the Y direction of the first compartment 54. The end surface in the +Z direction of the column portion 56 is defined as an 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.

[0040] In the first compartment 54, the pillar portion 58 is located in the +Y direction relative to the other pillar portion 56 and upstream of the downstream end of the first compartment 54 in the Y direction. The end face of the pillar portion 58 in the +Z direction is defined as an 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. The pillar portion 58 is cylindrical in shape due to the formation of a first suction port 86 (described later), and the pillar portion 56 is cylindrical in shape due to the formation of a second suction port 88 (described later). In other words, the pillar portion 58 is an example of a wall portion of the first suction port 86. The pillar portion 56 is an example of a wall portion of the second suction port 88. The outer diameter of each post 56 is smaller than the outer diameter of post 58 . The height of pillar portion 56 in the +Z direction and the height of pillar portion 58 in the +Z direction are approximately the same height, and as an example, are approximately 2 / 3 of the depth of first compartment 54 in the Z direction.

[0041] The rib 62 is provided at a position in the +Y direction different from a first suction port 86 and a second suction port 88 described below, and extends in the +Y direction. Specifically, the rib 62 is formed in a plate shape having a predetermined thickness in the X direction. The rib 62 is located in the -Y direction from the center in the Y direction of the first bottom surface 55. Furthermore, the rib 62 has, as an example, a peak portion 63, a flat portion 64, and a peak portion 65, in that order toward the +Y direction.

[0042] The peaks 63 are formed in a trapezoidal shape when viewed from the X direction. An upper surface 63A is formed at the end of the peaks 63 in the +Z direction. The upper surface 63A is an example of a top, and is a flat surface along the XY plane. In addition, the height of the upper surface 63A in the +Z direction is, for example, aligned with the height of the support surface 34 in the +Z direction. The upper surface 63A is connected to the support surface 34. The peaks 65 are formed in a trapezoidal shape when viewed from the X direction. An upper surface 65A is formed at an end of the peaks 65 in the +Z direction. The upper surface 65A is an example of a top, and is a flat surface along the XY plane. In addition, the height of the upper surface 65A in the +Z direction is, for example, aligned with the height of the support surface 34 in the +Z direction. The flat portion 64 connects the peak portion 63 and one of the pillar portions 56 in the Y direction, and also connects the one of the pillar portions 56 and the peak portion 65 in the Y direction. In other words, the pillar portion 56 and the rib 62 are integrally formed. An upper surface 64A is formed at the end in the +Z direction of the flat portion 64. The upper surface 64A is a flat surface along the XY plane. 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.

[0043] The rib 66 is disposed at an interval from the rib 62 in the Y direction. The rib 66 is provided at a position in the +Y direction different from a first suction port 86 and a second suction port 88 described below, and extends in the +Y direction. Specifically, the rib 66 is formed in a plate shape having a predetermined thickness in the X direction. The rib 66 is located in the +Y direction from the center of the first bottom surface 55 in the Y direction. The rib 66 further has, as an example, a peak portion 67, a flat portion 68, a peak portion 69, and a flat portion 71, in that order in the +Y direction.

[0044] The peaks 67 are formed in a trapezoidal shape when viewed from the X direction. An upper surface 67A is formed at an end of the peaks 67 in the +Z direction. The upper surface 67A is an example of a top, and is a flat surface along the XY plane. In addition, the height of the upper surface 67A in the +Z direction is, for example, aligned with the height of the support surface 34 in the +Z direction. An upstream end of the peaks 67 in the Y direction has an inclined surface 67B. The inclined surface 67B rises toward the downstream in the Y direction. In other words, the +Y direction end of the inclined surface 67B is located further in the +Z direction than the -Y direction end.

[0045] The flat portion 68 connects the peak portion 67 and the other column portion 56 in the Y direction, and also connects the other column portion 56 and the peak 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 flat surface along the XY plane. 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. The peaks 69 are formed in a trapezoidal shape when viewed from the X direction. An upper surface 69A is formed at an end of the peaks 69 in the +Z direction. The upper surface 69A is an example of a top, and is a flat surface along the XY plane. In addition, the height of the upper surface 69A in the +Z direction is, for example, aligned with the height of the support surface 34 in the +Z direction. The flat portion 71 connects the peak portion 69 and the column portion 58 in the Y direction, and also connects the column portion 58 and the slope 74 in the Y direction. An upper surface 71A is formed at the end of the flat portion 71 in the +Z direction. The upper surface 71A is a flat surface along the XY plane. 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.

[0046] The second compartment 76 is formed in a rectangular shape with a dimension in the Y direction larger than a dimension in the X direction when viewed from the +Z direction. The size of the second compartment 76 is, for example, approximately the same as the size of the first compartment 54. R-shaped surfaces are formed at four corners of the second compartment 76. The second compartment 76 also has a second bottom surface 77 formed in 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 outer shape of the second bottom surface 77 is substantially the same as the outer shape of the second partitioned chamber 76. In addition, the second bottom surface 77 has, as an example, two pillar portions 58 and ribs 78, 79, and 66 toward the downstream in the Y direction.

[0047] A slope 81 is formed at the end of the second chamber 76 in the +Y direction. The slope 81 is inclined so that its height in the +Z direction increases as it approaches the +Y direction. The +Y end of the slope 81 is connected to the support surface 34. The angle that the slope 81 makes with the second bottom surface 77 is, for example, approximately 45°. The slope 81 guides the leading end of the roll paper PR in the transport direction to the support surface 34.

[0048] The ribs 78, 79, 66 are spaced apart in the Y direction. The rib 78 is formed in a trapezoidal shape when viewed from the X direction. An upper surface 78A is formed at an end of the rib 78 in the +Z direction. The upper surface 78A is an example of a top, and is a flat surface along the XY plane. Moreover, the height of the upper surface 78A in the +Z direction is, for example, aligned with the height of the support surface 34 in the +Z direction. The upper surface 78A is connected to the support surface 34. The rib 79 is formed in an isosceles trapezoidal shape when viewed from the X direction. An upper surface 79A is formed at an end of the rib 79 in the +Z direction. The upper surface 79A is an example of a top, and is a flat surface along the XY plane. In addition, the height of the upper surface 79A in the +Z direction is, for example, aligned with the height of the support surface 34 in the +Z direction. The upstream end of the rib 79 in the Y direction has an inclined surface 79B. The inclined surface 79B rises toward the downstream in the Y direction. In other words, the +Y direction end of the inclined surface 79B is located further in the +Z direction than the -Y direction end. The rib 66 in the second compartment 76 has a configuration similar to that of the rib 66 in the first compartment 54, except that a pillar portion 58 is arranged in place of the pillar portion 56 arranged in the first compartment 54. In other words, the second compartment 76 is not provided with a pillar portion 56.

[0049] The suction unit 84 communicates the space S in the +Z direction outside the support surface 34 with the negative pressure chamber 38. The suction unit 84 also has a plurality of first suction ports 86 and a plurality of second suction ports 88 as an example of a plurality of suction ports.

[0050] As an example, the multiple first suction ports 86 are formed one in the first compartment 54 and two in the second compartment 76. The first suction port 86 is formed in the column portion 58. 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 penetration direction, the shape of the first suction port 86 is circular. When viewed from the Z direction, the first opening area of ​​one of the first suction ports 86 is designated SA (FIG. 3).

[0051] As an example, two second suction ports 88 are formed in the first chamber 54, and none are formed in the second chamber 76. In the first chamber 54, the number of second suction ports 88 is greater than the number of first suction ports 86. The second suction port 88 is formed in the column portion 56. 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 penetrating direction, the shape of the second suction port 88 is circular. When viewed from the Z direction, the second opening area of ​​one of the second suction ports 88 is designated as SB (FIG. 3). The second opening area SB is smaller than the first opening area SA.

[0052] The second suction port 88 located most upstream in the +Y direction in the first compartment 54 is located upstream in the Y direction of the first suction port 86 located most upstream in the +Y direction in the second compartment 76. In other words, when the X direction end of the roll paper PR is transported so that it covers the first compartment 54 and the second compartment 76 from the +Z direction, the most upstream second suction port 88 of the first compartment 54 will suck in the roll paper PR before the most upstream first suction port 86 of the second compartment 76. In the first compartment 54, when viewed from the +Z direction, the centers of the X-direction of the first suction port 86 and the second suction port 88 and the centers of the X-direction of the ribs 62, 66 are aligned in the +Y direction and are disposed on the same straight line (not shown).

[0053] 5, one exhaust portion 92 is provided at one end of the negative pressure chamber 38 in the +X direction, which is one side in the X direction. The exhaust portion 92 exhausts air from the negative pressure chamber 38 to the outside of the negative pressure chamber 38. Note that, as an example, the exhaust portion 92 has a configuration in which a fan 93 is rotated by a motor (not shown). A movable wall 94 is provided on the other side of the negative pressure chamber 38 in the -X direction from the exhaust portion in the X direction.

[0054] As an example, the movable wall 94 is disposed rotatably about an axis along the Y direction at approximately the center in the X direction of the negative pressure chamber 38. The movable wall 94 is also configured to be able to partition the negative pressure chamber 38 into a first negative pressure chamber 39 in which the exhaust portion 92 is provided and a second negative pressure chamber 41 in which the exhaust portion 92 is not provided, by being rotated to stand upright in the +Z direction.

[0055] 6, the bottom wall 42 has a notch 42A that penetrates the bottom wall 42 in the Z direction. The notch 42A is formed in a rectangular shape whose dimension in the Y direction is longer than its dimension in the X direction. The movable wall 94 is housed in the cutout portion 42A when the movable wall 94 does not define the negative pressure chamber 38. Specifically, the movable wall 94 has a shaft portion 95 and a vertical wall portion 96, for example.

[0056] The shaft portion 95 is formed in a cylindrical shape with its axial direction in the Y direction, and is supported at both ends in the Y direction by bearings (not shown) so as to be rotatable around an axis along the Y direction. The vertical wall portion 96 is formed integrally with the shaft portion 95 and in a plate shape. Specifically, the vertical wall portion 96 is formed in a plate shape having a predetermined thickness in the Z direction in the stored state. A protrusion 97 that protrudes from the vertical wall portion 96 in the +Z direction is formed at the end of the vertical wall portion 96 in the +Y direction. The protrusion 97 is disposed in accordance with the position of the step portion 45 in the Y direction. A rounded surface 98 is formed in a part of the bottom wall 42 to avoid contact with the vertical wall portion 96 that is rotated.

[0057] As shown in FIG. 5, the movable wall 94 is rotated and controlled by the control unit 26 (FIG. 1) to switch between a stored position in which it is stored in the cutout portion 42A and a partitioning position in which it stands upright along the +Z direction to partition the negative pressure chamber 38. Specifically, when the X-direction width of the roll paper PR is equal to or less than the X-direction width of the first negative pressure chamber 39, the movable wall 94 is rotated to a partition position and stands upright along the +Z direction, thereby partitioning the negative pressure chamber 38 into the first negative pressure chamber 39 and the second negative pressure chamber 41. Furthermore, 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, the movable wall 94 rotates to the storage position, thereby releasing the partition between the first negative pressure chamber 39 and the second negative pressure chamber 41.

[0058] 5 shows length L1 corresponding to the width of the first negative pressure chamber 39 in the X direction, length L2 corresponding to the width of the second negative pressure chamber 41 in the X direction, and 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 length L1, the movable wall 94 rotates to the partitioning position, causing the movable wall 94 to partition the negative pressure chamber 38. When the length of the roll paper PR in the X direction is equal to or greater than length L1, the movable wall 94 rotates to the storage position, causing the movable wall 94 to release the partition of the negative pressure chamber 38.

[0059] Next, the operation of the printer 10 according to the embodiment will be described. Note that for each component of the printer 10, please refer to Figures 1 to 6, and the description of individual figure numbers will be omitted.

[0060] According to the printer 10, air outside the support section 32 flows into the negative pressure chamber 38 through the first suction port 86 and the second suction port 88. This air flow causes the roll paper PR to be attracted to the support section 32 while being transported. Here, even if the negative pressure in the negative pressure chamber 38 is insufficient at the X-direction end of the support portion 32, because the second suction port 88 in the first compartment 54 is positioned upstream of the first suction port 86 in the second compartment 76, suction begins at the end of the roll paper PR in the X-direction before it begins at the center of the roll paper PR in the X-direction, it is possible to prevent insufficient suction at the end of the roll paper PR in the X-direction. Furthermore, because the opening area SB of the second suction port 88 located upstream of the first suction port 86 is smaller than the opening area SA of the first suction port 86, the inflow speed of the air flowing into the second suction port 88 is higher than the inflow speed of the air flowing into the first suction port 86. This makes it possible to further prevent insufficient suction at the end of the roll paper PR in the X direction.

[0061] According to the printer 10, because the number of second suction ports 88 is greater than the number of first suction ports 86, more areas are sucked in at the ends of the X-direction of the roll paper PR compared to the center, so that lifting up of the ends of the X-direction of the roll paper PR at the support portion 32 can be suppressed. According to the printer 10, the first suction port 86 and the second suction port 88 are each formed in a cylindrical shape extending in the +Z direction. This reduces the frequency of the generated sound compared to a configuration in which the first suction port 86 and the second suction port 88 are formed in the support surface 34, making it less likely for the so-called whistling phenomenon to occur and reducing noise. Furthermore, because the height of the top surfaces 56A, 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 paper PR supported by the support surface 34 from being adsorbed to the top surfaces 56A, 58A of the pillars 56, 58.

[0062] According to the printer 10, the roll paper PR is supported by contacting the ribs 62, 66, 78, and 79 before coming into contact with the first bottom surface 55 and the second bottom surface 77, thereby preventing a portion of the roll paper PR from drooping down to the first bottom surface 55 and the second bottom surface 77 as it is transported. According to the printer 10, when a portion of the roll paper PR is sucked by the first suction port 86 and the second suction port 88, 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, thereby preventing the portion of the roll paper PR being transported from sagging down to the first bottom surface 55 and the second bottom surface 77.

[0063] According to the printer 10, a portion of the roll paper PR facing the first compartment 54 and the second compartment 76 is supported by the ribs 62, 66, 78, and 79 in the same manner as the portion supported by the support surface 34, so that the roll paper PR is prevented from falling into the first compartment 54 and the second compartment 76. According to printer 10, even if a portion of roll paper PR falls toward first bottom surface 55 or second bottom surface 77, the portion of roll paper PR is guided by contact with inclined surfaces 67B, 79B, and the height position of the roll paper PR rises, thereby preventing the portion of roll paper PR from getting caught on ribs 62, 66, 79.

[0064] According to the printer 10, when an external force is applied to the pillars 56, 58, the ribs 62, 66 support the pillars 56, 58, thereby increasing the strength of the pillars 56, 58. According to the printer 10, a portion of the inner wall surface 36 of the negative pressure chamber 38 is flat, which reduces the pressure loss in the negative pressure chamber 38 compared to a configuration in which a convex portion is formed on the inner wall surface 36, thereby preventing a decrease in the suction force at the first suction port 86 and the second suction port 88. Furthermore, in the support portion 32, the outer portion opposite the inner wall surface 36 becomes a protrusion protruding from the first bottom surface 55 and the second bottom surface 77, so that the support portion 32 can be easily molded.

[0065] According to the printer 10, one end of the roll paper PR in the X direction is attracted to the support portion 32 at the reference position E, so that even if the size of the roll paper PR is changed, the one end of the roll paper PR in the X direction can be supported by the support portion 32. According to the printer 10, multiple first compartments 54 are provided in accordance with the position of the other end of the roll paper PR in the X direction, so that both ends of the roll paper PR in the X direction can be supported even if the size of the roll paper PR is changed.

[0066] According to the printer 10, when small-sized roll paper PR is transported with a bias to one side in the X direction, a single discharge section 92 is provided on one side of the negative pressure chamber 38 in the X direction, so that the end of the small-sized roll paper PR can be efficiently sucked in. According to the printer 10, when the width in the X direction of the roll paper PR is equal to or less than the width in the X direction of the first negative pressure chamber 39, the negative pressure chamber 38 is partitioned by the movable wall 94, thereby suppressing a drop in pressure in the first negative pressure chamber 39 and preventing the roll paper PR from floating up. On the other hand, when the width in the X direction of the roll paper PR is larger than the width in the X direction of the first negative pressure chamber 39, the partition of the negative pressure chamber 38 by the movable wall 94 is released, and the roll paper PR can also be sucked in at the portion corresponding to the second negative pressure chamber 41, so that even if the roll paper PR is large, the end portion in the X direction of the roll paper PR can be prevented from floating up.

[0067] [Variations] Next, a modified printer 100, which is an example of a recording device, will be described with reference to the accompanying drawings. Note that parts common to the printer 10 are given the same reference numerals and descriptions thereof will be omitted.

[0068] Fig. 7 shows a part of the platen unit 110 of the printer 100. Note that Fig. 7 also shows a position corresponding to the other end of the roll paper PR in the platen unit 110, for example, a position corresponding to partition 52B. As an example, partition 52B is configured symmetrically to partition 52A with respect to a line (not shown) along the Y direction. The printer 100 is configured such that a platen unit 110 replaces the platen unit 30 of the printer 10 (FIG. 1). In other words, the configuration of the printer 100 other than the platen unit 110 is the same as that of the printer 10.

[0069] The platen unit 110 differs from the platen unit 30 (FIG. 1) in that it further includes a third compartment 112 and a fourth compartment 122. The other configurations are similar to those of the platen unit 30. As an example, the third compartment 112 is disposed downstream in the Y direction with respect to the first compartment 54 adjacent to the recess 51. The length of the third compartment 112 in the Y direction is shorter than the length of the first compartment 54 in the Y direction. The third compartment 112 has a bottom surface 114 recessed in the -Z direction from the support surface 34. A slope 74 is formed at the end of the third compartment 112 in the +Y direction.

[0070] The bottom surface 114 has, by way of example, two posts 116 and one rib 118 . The two pillars 116 are formed in a cylindrical shape standing upright in the +Z direction from the bottom surface 114. The two pillars 116 are located at both ends in the Y direction of the third compartment 112. The two pillars 116 are also positioned offset in the -X direction with respect to an extension line (not shown) of the rib 66 extended in the Y direction. The end face of column portion 116 in the +Z direction is defined as upper surface 116A. The height of upper surface 116A in the +Z direction is the same as the height of support surface 34 in the +Z direction. A third suction port 117 is formed in column portion 116, penetrating column portion 116 in the Z direction. When viewed from the Z direction, the opening area SC of the third suction port 117 is approximately the same as the opening area SB of the second suction port 88, for example.

[0071] The rib 118 is formed in a plate shape having a predetermined thickness in the X direction, and extends along the Y direction. The rib 118 also connects the two pillar portions 116 in the Y direction. The rib 118 is also positioned offset in the -X direction with respect to the extension line of the rib 66 described above. In this way, the two pillars 116 and the rib 118 are positioned offset in the -X direction with respect to the center of the third chamber 112. In other words, the two pillars 116 and the rib 118 are positioned in the third chamber 112 toward the end of the recess 51 or the roll paper PR in the X direction.

[0072] As an example, the fourth compartment 122 is disposed downstream in the Y direction with respect to the first compartment 54 and the second compartment 76 which are not adjacent to the recess 51. The length of the fourth compartment 122 in the Y direction is substantially equal to the length of the third compartment 112 in the Y direction. The fourth compartment 122 has a bottom surface 124 recessed in the -Z direction from the support surface 34. A slope 74 is formed at the end of the fourth compartment 122 in the +Y direction. The bottom surface 124 has, for example, two pillar portions 116 in which the third suction port 117 is formed, and one rib 118. In the fourth compartment 122, the two pillar portions 116 and the one rib 118 are disposed on the above-mentioned extension line of the rib 62. In other words, the third compartment 112 and the fourth compartment 122 have different arrangements of the two pillar portions 116 and the one rib 118 in the X direction.

[0073] In the printer 100, the position of the third suction port 117 in the third chamber 112 is close to the X-direction end position of the roll paper PR, making it easier to attract the X-direction end of the roll paper PR that has passed through the first chamber 54 to the support portion 32.

[0074] The printers 10, 100 according to the embodiments and variations of the present invention are based on the configuration described above, but it is of course possible to modify or omit parts of the configuration without departing from the spirit of the present invention.

[0075] In the 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. The total number of pillar portions 56 and pillar portions 58 on each of the first bottom surface 55 and the second bottom surface 77 may be one or four or more. The height of the upper surfaces 56A and 58A may be equal to the height of the support surface 34. The number of ribs formed on each of the first bottom surface 55 and the second bottom surface 77 may be one or four or more. Furthermore, a plurality of each rib may be arranged in the X direction. Alternatively, no ribs may be formed on the first bottom surface 55 or the second bottom surface 77.

[0076] The centers in the X direction of the first suction port 86 and the second suction port 88 and the centers in the X direction of the ribs 62, 66, 78, and 79 may be disposed so as to be shifted in the X direction. The height of the tops of the ribs 62, 66, 78, and 79 may be lower than the height of the support surface 34. The rib 66 may not have the inclined surface 67B. The rib 79 may not have the inclined surface 79B. The posts 56, 58 and the ribs 62, 66 may be formed as separate pieces. A portion of the inner wall surface 36 may be formed to protrude inward.

[0077] The first compartment 54 does not have to be adjacent to the recess 51 in the X direction. Moreover, the first compartment 54 may be disposed offset in the X direction with respect to the reference position E. The number of first compartments 54 disposed on the other side of the reference position E may be one. The exhaust port 92 may be located in a side wall of the negative pressure chamber 38 . As long as the suction state of the roll paper PR can be ensured, the movable wall 94 may be placed in the storage position even for a small-sized roll paper PR. Also, the movable wall 94 is not limited to being a rotating wall, but may be a wall that slides in the Z direction.

[0078] The recording unit 18 may be either a serial type recording head or a line head. The arrangement method of the paper P is not limited to the side registration method in which the paper P is arranged in the +X or -X direction, but may be a center registration method in which the center of the device in the X direction and the center of the paper P are aligned. [Explanation of symbols]

[0079] 10... printer, 12... housing, 13... side wall, 14... storage section, 16... transport section, 17: conveying roller pair; 18: recording section; 19: discharge port; 22: cutting section; 24: discharge unit, 25: support stand, 26: control unit, 28: discharge roller pair, 30: platen unit; 32: support portion; 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: notch; 43: upper bottom wall; 44...lower bottom wall, 45...step portion, 46...front wall, 48...rear wall, 51...recess portion, 52A: partition, 52B: partition, 52C: partition, 54: first partition, 54A...first compartment, 54B...first compartment, 55...first bottom surface, 56...column portion, 56A...upper surface, 58... column portion, 58A... upper surface, 62... rib, 63... mountain portion, 63A... upper surface, 64... flat portion, 64A...upper surface, 65...ridge portion, 65A...upper surface, 66...rib, 67...ridge portion, 67A...upper surface, 67B... inclined surface, 68... flat portion, 68A... upper surface, 69... mountain portion, 69A... upper surface, 71...flat portion, 71A...upper surface, 74...slope, 76...second compartment, 77...second bottom surface, 78...rib, 78A...upper surface, 79...rib, 79A...upper surface, 79B...inclined surface, 81...inclined surface, 84 ... suction part, 86 ... first suction port, 88 ... second suction port, 92 ... exhaust part, 93 ... fan, 94...Movable wall, 95...Shaft part, 96...Vertical wall part, 97...Protrusion part, 98...R surface, 100: printer; 110: platen unit; 112: third compartment; 114: bottom surface; 116: column portion, 116A: upper surface, 117: third suction port, 118: rib, 122...fourth compartment, 124...bottom surface, L1...length, L2...length, L3...length, P...paper, P1...Roll paper, P2...Roll paper, PR...Roll paper, PS...Cut paper

Claims

1. a recording unit that records on a recording medium conveyed in a conveying direction; a support section disposed opposite the recording section and having a support surface for supporting the recording medium; a negative pressure chamber disposed on an opposite side of the recording unit with respect to the support unit; a plurality of compartments formed in the support portion, each compartment having a bottom surface recessed from the support surface, and each compartment arranged in a width direction intersecting with the conveying direction; a plurality of suction ports formed in the support portion and connecting a space outside the support surface to the negative pressure chamber; the plurality of compartments include at least one first compartment facing the recording medium at a position inside an end of the recording medium in the width direction and closest to the end, and at least one second compartment disposed inside the first compartment in the width direction, the plurality of suction ports include at least one first suction port and at least one second suction port having a second opening area smaller than a first opening area of ​​the first suction port; The second suction port is disposed in the first compartment at a most upstream position in the conveying direction, The first suction port is disposed at the most upstream side in the conveying direction in the second compartment, the second suction port arranged at the most upstream side in the first compartment in the transport direction is arranged at a position upstream in the transport direction of the first suction port arranged at the most upstream side in the second compartment in the transport direction. A recording apparatus comprising:

2. 2. The recording apparatus according to claim 1, One or more of the first suction ports and one or more of the second suction ports are arranged in the first compartment, In the first compartment, the number of the second suction ports is greater than the number of the first suction ports. A recording apparatus comprising:

3. 3. The recording apparatus according to claim 1, the bottom surface has at least one post upstanding therefrom; The height of the upper surface of the column portion in the upright direction is lower than the height of the support surface in the upright direction, The plurality of suction ports are through holes penetrating the column portion in the upright direction. A recording apparatus comprising:

4. 4. The recording apparatus according to claim 1, the bottom surface has at least one rib that is provided at a position different from the suction port in the conveying direction and extends in the conveying direction; A recording apparatus comprising:

5. 5. The recording apparatus according to claim 4, a center of the suction port in the width direction and a center of the rib in the width direction are arranged side by side in the conveying direction; A recording apparatus comprising:

6. 6. The recording apparatus according to claim 4, At least a portion of the height of the rib at the top is aligned with the height of the support surface. A recording apparatus comprising:

7. 7. The recording apparatus according to claim 4, an upstream end of the rib in the conveying direction has an inclined surface that rises toward the downstream; A recording apparatus comprising:

8. 8. The recording apparatus according to claim 4, The wall of the suction port and the rib are integrally formed. A recording apparatus comprising:

9. 9. The recording apparatus according to claim 8, the support portion has an inner wall surface that forms a part of a wall surface of the negative pressure chamber, In the support portion, the support surface, the wall portion of the suction port, and the inner wall surface corresponding to the position where the rib is formed are flat surfaces. A recording apparatus comprising:

10. 10. The recording apparatus according to claim 1, the recording unit performs recording by ejecting droplets onto the recording medium; a droplet receiving section for receiving the droplets when borderless recording is performed on the recording medium, the droplet receiving section being provided at an end section of the support surface in the width direction of the recording medium; The first compartment is adjacent to the droplet receiving section in the width direction. A recording apparatus comprising:

11. 11. The recording apparatus according to claim 10, the droplet receiving portion is provided at a reference position on the support surface where one end of the recording medium in the width direction is located; A recording apparatus comprising:

12. 12. The recording apparatus according to claim 11, the recording unit is capable of recording on the recording medium of a plurality of sizes having different widths in the width direction, a plurality of droplet receiving sections are provided at positions other than the reference position, the droplet receiving sections being aligned with the positions of the other end portions of the recording medium in the width direction; A recording apparatus comprising:

13. 13. The recording apparatus according to claim 1, A discharge portion for discharging air from the negative pressure chamber is provided at one end of the negative pressure chamber in the width direction. A recording apparatus comprising:

14. 14. The recording apparatus according to claim 13, a movable wall is provided on the other side of the discharge portion in the width direction in the negative pressure chamber, the movable wall being capable of dividing 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, The movable wall is When 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 negative pressure chamber is divided into the first negative pressure chamber and the second negative pressure chamber, When the width of the recording medium in the width direction is larger than the width of the first negative pressure chamber in the width direction, the partition between the first negative pressure chamber and the second negative pressure chamber is released. A recording apparatus comprising:

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