JP5384215B2 - Printer device - Google Patents

Description

  The present invention relates to a printer apparatus that performs printing by discharging ink from a printer head.

  In general, the printer apparatus (inkjet printer) is supported by a platen in a predetermined pattern by ejecting ink from ejection nozzles formed on the lower surface of the printer head while moving the printer head relative to the print medium. It is configured to perform printing by adhering to a print medium. As a printer that prints on a long sheet-like print medium, printing is performed by ejecting ink from the ejection nozzle while combining the action of moving the printer head to the left and right and the action of feeding the print medium back and forth. There is something to apply. In recent years, there is a demand for printing on print media made of various materials such as paper, cloth, and vinyl chloride. In order to meet this demand, a printer device corresponding to the material of the print medium has been developed.

  By the way, in the printer apparatus, the configuration of the platen is particularly important in order to make the lower surface of the printer head and the print medium face each other in parallel. For example, FIG. 3 of Patent Document 1 discloses a configuration in which a first position restricting member 20 and a second position restricting member 21 are provided on the downstream side in the transport direction and the upstream side in the transport direction near the recording head 15. . With this configuration, it is possible to suppress the influence of a phenomenon (hereinafter referred to as cockling) in which a portion where ink is attached undulates locally.

  FIG. 5 shows a printer device 500 (partially omitted) that performs printing on a printing medium made of cloth (hereinafter referred to as cloth medium). The printer device 500 feeds the cloth medium N forward by the feed roller 540 and combines the operation of positioning the printer medium 510 below the printer head 510 with the action of reciprocating the printer head 510 in the depth direction of the paper surface. It is configured to print by discharging ink toward N. When printing is performed on the cloth medium N, a part of the ink ejected from the printer head 510 and attached thereto may drop downward and drop. Therefore, the printer device 500 is provided with a receiving member 520 that opens upward so that the dropped ink can be received instead of a flat platen (not shown) for adsorbing and fixing the print medium. . At the bottom of the receiving member 520, a porous member 530 made of, for example, a sponge that absorbs the received ink is provided.

  As a method of performing desired printing on the cloth medium N, apart from the above-described method of ejecting and adhering direct ink, a printing process of once performing desired printing on the sublimation transfer paper S, and the sublimation transfer paper S There is a sublimation transfer method including a transfer process in which the cloth medium N is dyed by heating in a state where the cloth medium N is overlaid. This sublimation transfer method has an advantage that a bright and vivid printed matter can be obtained while leaving the texture of the cloth itself, compared to the method of directly attaching the ink. Therefore, the sublimation transfer method is used for printing banners, T-shirts, uniforms, and the like.

JP-A-9-193374

  By the way, there is a case where it is desired to print on the sublimation transfer paper S using the printer device 500. In this case, the sublimation transfer paper S does not drop and drop ink, but cockling may occur in a portion where the ink is attached (see FIG. 5). In particular, in the printer device 500, the sublimation transfer paper S positioned below the printer head 510 is in a floating state in the air, so that the cock ring is not compared with a state where it is adsorbed and fixed to a flat platen. Remarkably easy to appear. If cockling appears conspicuously, the sublimation transfer paper S and the printer head 510 may interfere with each other and affect print quality. Therefore, for example, when printing is performed on the sublimation transfer paper S, a method of removing the receiving member 520 and replacing the sublimation transfer paper S with a platen (not shown) configured to be adsorbable and fixed can be considered. According to this method, it is possible to reduce the influence of cockling by adsorbing and fixing the sublimation transfer paper S to the platen. On the other hand, it is necessary to prepare a platen having an expensive adsorption mechanism composed of many parts, and this replacement work. Takes a lot of work time and is not realistic. For this reason, there is a problem that it is difficult to perform printing on a print medium such as the sublimation transfer paper S that is liable to generate cockling using a printer device configured to be able to print on the cloth medium N.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a printer device capable of printing on a print medium in which cockling such as cloth media and sublimation transfer paper is likely to occur.

  In order to achieve the above object, a printer apparatus according to the present invention is provided movably along a guide rail extending in the scanning direction, and a printer head that discharges ink downward, and is positioned below the printer head. A platen (for example, the ink receiving member 30 and the convex platen 50 in the embodiment) and a long print medium (for example, the sublimation transfer paper S in the embodiment) are placed and supported. A medium transport mechanism (for example, a feed roller 12a, a pinch roller 15c, and a support roller 16 in the embodiment) that feeds in a transport direction orthogonal to the scanning direction and is positioned between the printer head and the platen. The platen protrudes upward with respect to the medium transport mechanism and faces the lower surface of the printer head (for example, In the embodiment, a support portion 51) is formed, the print medium fed by the medium transport mechanism is supported by the platen, and the print head supports the portion of the print medium supported by the opposing support surface. Printing is performed by discharging ink.

  The platen includes an upper platen (for example, the convex platen 50 in the embodiment) on which the opposing support surface is formed, and ink ejected from the printer head provided below the upper platen. A lower platen (for example, the ink receiving member 30 in the embodiment) that can receive ink, and the upper platen is configured to be detachable from the lower platen so that the attached ink is transmitted therethrough. When printing is performed using (for example, the cloth medium N in the embodiment), printing is performed in a state where the upper platen is removed from the lower platen, and a print medium (for example, capable of receiving attached ink) When printing is performed using the sublimation transfer paper S) in the embodiment, the upper platen is attached to the lower platen. It is preferable to carry out the printing.

  In the above-described printer apparatus, a configuration including a head position adjusting mechanism that adjusts the height position of the printer head with respect to the guide rail is preferable.

  Furthermore, the medium transport mechanism is disposed upstream of the platen in the transport direction and extends in the scanning direction, and is disposed downstream of the platen in the transport direction. A downstream support roller extending in the scanning direction, and the upstream support roller and the downstream support roller are preferably arranged so that the medium support surfaces for supporting the print medium are substantially horizontal. .

  In the above-described printer device, a tension in a direction opposite to the transport direction is applied to a print medium that is disposed upstream of the upstream support roller in the transport direction and supported by the medium transport mechanism. An upstream tension applying member (for example, the tension arm 24 and the roller 25 in the embodiment) and the print medium disposed on the downstream side in the transport direction with respect to the downstream support roller and supported by the medium transport mechanism. It is preferable that a downstream tension applying member (for example, the tension arm 26 and the roller 27 in the embodiment) that applies tension in the transport direction to the transport direction is provided.

  The printer device according to the present invention has a platen that protrudes upward with respect to the medium transport mechanism and has an opposing support surface that is opposed to the lower surface of the printer head. In this way, printing is performed by ejecting ink from the printer head. With this configuration, for example, when printing is performed on sublimation transfer paper, where cockling is likely to occur, the printing is performed with the sublimation transfer paper supported on the opposing support surface that protrudes upward. Thus, high quality printing can be performed without causing the printer head and the sublimation transfer paper to interfere with each other.

  Further, it is preferable that the platen includes an upper platen having an opposing support surface and a lower platen that can receive ink, and the upper platen can be attached to and detached from the lower platen. In such a configuration, when printing on, for example, a cloth medium through which the attached ink is transmitted, printing is performed with the upper platen removed, and the transmitted ink is received by the lower platen so that the ink is received. Printing is possible without splashing around. On the other hand, when printing on sublimation transfer paper that can accept attached ink, for example, printing is performed with the upper platen attached, so that the sublimation transfer paper is supported on the opposite support surface to suppress the occurrence of cockling. Printing can be performed without causing interference between the printer head and the sublimation transfer paper. In this way, by a simple method of attaching and detaching the upper platen according to the printing medium, both the printing medium through which ink such as cloth media permeates and the printing medium such as sublimation transfer paper that easily causes cockling are generated. High quality printing is possible.

  Note that the printer device preferably includes a head position adjusting mechanism that adjusts the height position of the printer head with respect to the guide rail. With this configuration, it is possible to bring the print medium and the printer head as close as possible without interfering with each other regardless of whether or not the upper platen is attached. By bringing the print medium and the printer head close to each other, the ink ejected from the printer head can be reliably attached to the print medium without floating in the air. Therefore, the print quality can be improved and the contamination caused by the ink floating in the air can be reduced.

  It is preferable that the medium transport mechanism includes an upstream support roller and a downstream support roller, and the medium support surfaces that support these print media are disposed so as to be substantially horizontal. In this configuration, although the upstream and downstream support rollers are arranged in a substantially horizontal manner, the print medium can be positioned substantially horizontally below the printer head, and the positional accuracy is high. Secured high-quality printing is possible.

  In addition, the configuration includes an upstream tension applying member that applies tension in the direction opposite to the transport direction to the print medium, and a downstream tension applying member that applies tension in the transport direction to the print medium. preferable. With this configuration, the print medium supported by the medium transport mechanism can be tensioned in the opposite direction so that the print medium can be reliably positioned substantially horizontally below the printer head. High-quality printing can be ensured.

1 is a front view of a printer apparatus to which the present invention is applied. It is the perspective view which showed the head unit periphery. It is sectional drawing which showed the III-III part in FIG. It is sectional drawing of the state which mounted | wore the convex platen. It is sectional drawing of the conventional printer apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. For convenience of explanation, the arrow directions shown in the drawings are defined as front and rear, left and right, and up and down. First, the basic configuration of the printer apparatus 10 to which the present invention is applied will be described with reference to FIGS. The printer device 10 described below is basically configured to print on a sheet-like cloth medium N, and a sheet-like sublimation transfer is performed by mounting a convex platen 50 described later. The configuration allows high-quality printing on the paper S.

  As shown in FIG. 1, the printer device 10 is provided on a left side of the support body 11 having left and right support legs 11 a and 11 b, a center body part 12 supported by the support legs 11, and the center body part 12. A left body portion 13, a right body portion 14 provided on the right side of the central body portion 12, an upper body portion 15 that connects the left and right body portions 13, 14, and is spaced parallel to the upper side of the central body portion 12. It is configured with.

  On the front side of the left body portion 13, an operation portion 13 a composed of operation switches, display devices, and the like is provided. In addition, an operation signal from the operation unit 13 a is input inside the left body unit 13, and a controller 13 b that performs operation control by outputting an operation signal to each component of the printer device 10 is mounted. Inside the upper body portion 15, a guide rail 15 a that extends to the left and right is provided. A head unit 20 to be described later is attached to the guide rail 15a, and the head unit 20 is movable to the left and right along the guide rail 15a (see FIG. 2).

  As shown in FIG. 2, the head unit 20 is mainly composed of a carriage 21 and a printer head 22. The rear surface of the carriage 21 is fitted with the guide rail 15a, and is movable right and left along the guide rail 15a. The carriage 21 is a mounting base for the printer head 22. The printer head 22 is composed of, for example, a plurality of printer heads 22M, 22Y, 22C, and 22K for each color of magenta (M), yellow (Y), cyan (C), and black (K). A plurality of ejection nozzles (not shown) for ejecting ink downward are formed on the lower surfaces of the printer heads 22.

  The head unit 20 is mounted with a vertical movement mechanism (not shown) that moves the head unit 20 up and down with respect to the guide rail 15a. By this vertical movement mechanism, the print medium and the printer head 22 can be adjusted to face each other with a predetermined distance depending on the thickness of the print medium.

  A plurality of clamping devices 15b are attached to the lower portion of the upper body portion 15 side by side. A pinch roller 15c is rotatably attached to the front end portion of the clamp device 15b. Below the pinch roller 15c, a cylindrical feed roller 12a that is exposed on the upper surface of the central body portion 12 and extends to the left and right is provided. The feed roller 12a is rotationally driven by a front / rear drive motor (not shown). The clamp device 15b can be set to a clamp position where the pinch roller 15c is pressed against the feed roller 12a and an unclamp position where the pinch roller 15c is separated from the feed roller 12a. With this configuration, the sheet-like cloth media N that is the printing object is sandwiched between the pinch roller 15c and the feed roller 12a, and the feed roller 12a is rotated after the clamp device 15b is set at the clamp position. The cloth media N can be fed forward or backward by a predetermined distance (see FIG. 3).

  By the way, when printing is performed by attaching the ink discharged from the printer head 22 to the cloth medium N, depending on the material of the cloth medium N and the amount (density) of the attached ink, a part of the attached ink may cause the cloth medium N to be attached. May be transparent. If the transmitted ink scatters around, it may adhere to the cloth media N, for example, and affect the print quality. Therefore, an ink receiving member 30 for receiving and collecting ink dropped from the cloth medium N is provided below the printer head 22.

  As shown in FIGS. 2 and 3, the ink receiving member 30 is configured mainly by a main body tray 31 that opens upward and extends left and right, and an absorbent sponge 39 accommodated in the main body tray 31. . The main body tray 31 is formed, for example, by bending a plate-shaped metal material. Edge portions 33 and 33 are formed at the front and rear end portions, and a bottom portion 32 is formed so as to connect the edge portions 33 and 33. Yes. The main body tray 31 has a receiving space 34 opened upward by the edges 33 and 33 and the bottom 32. The absorption sponge 39 is formed to extend from side to side using, for example, a resin material, and can absorb ink. The absorbent sponge 39 is attached to the bottom 32 of the main body tray 31. Since the ink receiving member 30 configured in this way is formed widely in the front and rear, it is possible to collect not only ink dripped from the cloth medium N but also ink mist scattered around.

  FIG. 3 shows a state in which the fabric media N that has not been printed (the state in which the ink ejected from the printer head 22 is not attached) is fed out and printed, and then wound up. The feeding portion 23 is a roll of unprinted cloth media N and is provided on the rear side of the support leg 11. The tension arm 24 is attached to the support leg 11 and can swing downward by its own weight. A roller 25 is rotatably attached to the tip of the tension arm 24. The winding portion 28 is a roll of the printed fabric media N wound in a roll shape, and is provided at a position symmetrical to the feeding portion 23 (on the front side of the support leg 11). The tension arm 26 has the same configuration as the tension arm 24 and is provided at a position symmetrical to the tension arm 24 (on the front side of the support leg 11). A roller 27 is rotatably attached to the tip of the tension arm 26.

  In front of the ink receiving member 30, a support roller 16 extending left and right for supporting the printed fabric medium N is rotatably provided. The surface of the support roller 16 is formed of, for example, a porous member that can absorb ink. A cleaning roller 17 is provided so as to abut on the surface of the support roller 16, and the cleaning roller 17 rotates with the rotation of the support roller 16. The surface of the cleaning roller 17 is covered with a member that can absorb ink such as cloth. Therefore, when the transmitted ink is attached to the lower surface side of the printed fabric medium N, the ink on the lower surface side is absorbed by the support roller 16 and removed. Further, the ink absorbed by the support roller 16 is absorbed by the cleaning roller 17. Therefore, when the paper is taken up by the take-up unit 28, the ink attached to the lower surface side of the cloth medium N is not contaminated, and the print quality can be ensured.

  As can be seen from FIG. 3, the fabric medium N is supported substantially horizontally by the feed roller 12 a and the support roller 16. The printer head 22 and the ink receiving member 30 are provided so as to sandwich the cloth medium N supported substantially horizontally from above and below. Further, the tension arm 24 and the tension arm 26 are configured to apply tension to the cloth medium N by its own weight. With this configuration, the cloth medium N is stretched substantially horizontally below the printer head 22.

  The basic configuration of the printer device 10 that can print on the fabric medium N has been described above. Hereinafter, an operation when printing is performed on the cloth medium N using the printer device 10 will be described with reference to FIG.

  At the time of printing, the unprinted cloth medium N is fed from the feeding unit 23 and is supported substantially horizontally by the feed roller 12a and the support roller 16. The clamp device 15b is set at the clamp position, and combines the operation of rotating the feed roller 12a to feed the cloth medium N forward by a predetermined distance and the operation of moving the head unit 20 left and right along the guide rail 15a. Ink is ejected from the printer head 22. By doing so, printing is performed on the substantially horizontally supported portion of the cloth medium N. By repeating the above operation, printing can be performed on the entire cloth medium N. The printed fabric medium N is wound up in a roll shape at the winding unit 28.

  At the time of printing, since the cloth medium N is stretched (pulled downward) by the tension arms 24 and 26, the cloth medium N is straightly stretched below the printer head 22. In addition, the cloth media N generally does not cause local cockling due to ink adhesion. Therefore, by the above operation, it is possible to perform high-quality printing in which positional accuracy is ensured for the cloth media N.

  By the way, when desired printing is performed on the cloth medium N, the printing method in which the ink ejected from the printer head 22 is directly adhered as described above is taken into consideration in consideration of the material of the cloth medium N, the finishing state of the printing, and the like. A sublimation transfer method may be employed in which desired printing is performed on the sublimation transfer paper S, and the sublimation transfer paper S and the cloth media N are heated to dye the cloth media N.

  When printing is performed on the sublimation transfer sheet S in the same manner as the cloth medium N using the printer device 10 having the above-described configuration, the ink receiving member 30 is opened upward. In FIG. 2, the sublimation transfer paper S cannot be adsorbed and fixed to the platen, for example, and is in a floating state in the air. Unlike the cloth media N, the sublimation transfer paper S does not allow the attached ink to pass therethrough, but is liable to cause cockling (wrinkles) locally when the ink is attached. This local cockling is difficult to be completely straight below the printer head 22 even when tension is applied by the tension arms 24 and 26. For this reason, when printing is performed on the sublimation transfer paper S using the printer 10 as it is, for example, the printer head 22 and the sublimation transfer paper S waved up and down by cockling interfere with each other. The print quality may be deteriorated.

  Therefore, when printing is performed on the sublimation transfer paper S using the printer device 10, the convex platen 50 shown in FIG. 4 is mounted on the printer device 10. The convex platen 50 is formed, for example, by bending a plate-shaped metal material, and extends to the left and right as much as the ink receiving member 30. Further, the convex platen 50 has edge portions 52 and 52 formed at the front and rear end portions, and connects the edge portions 52 and 52, and the support portion 51 protrudes upward with respect to the edge portions 52 and 52. Is formed. The convex platen 50 formed in this way is attached to the printer device 10 such that the edges 52 and 52 are placed on the edges 33 and 33. In a state where the convex platen 50 is mounted on the printer apparatus 10, the support portion 51 and the printer head 22 face each other in the vertical direction.

  Hereinafter, an operation when printing is performed on the sublimation transfer paper S using the printer device 10 on which the convex platen 50 is mounted will be described. The sublimation transfer sheet S fed out from the feeding unit 43 is supported by the support unit 51 below the printer head 22 in a state where it is lifted upward by the height of the support unit 51, for example. At this time, the vertical position of the head unit 20 with respect to the guide rail 15a is adjusted by the vertical movement mechanism, for example, according to the height of the support portion 51, and the vertical distance between the printer head 22 and the sublimation transfer paper S is adjusted. . FIG. 4 illustrates a state in which the sublimation transfer sheet S positioned between the support unit 51 and the feed roller 12a (between the support unit 51 and the support roller 16) is inclined by about 15 degrees with respect to the horizontal direction. However, the inclination angle is not limited to about 15 degrees, and may be about 5 degrees, for example. The sublimation transfer paper S printed under the printer head 22 is taken up by the take-up unit 48.

  In this way, by supporting the sublimation transfer paper S with the convex platen 50 (supporting part 51), the tension applied to the sublimation transfer paper S by the tension arms 24 and 26 is applied to the part supported by the support part 51. It is possible to effectively act on the sublimation transfer paper S. Therefore, it is possible to make the sublimation transfer paper S supported by the support portion 51 straight (a state in which wrinkles are stretched) along the surface of the support portion 51. Therefore, interference between the sublimation transfer sheet S and the printer head 22 due to cockling can be prevented, and high-quality printing can be performed on the sublimation transfer sheet S.

  Furthermore, the support unit 51 is more inclined to the sublimation transfer paper S positioned between the support unit 51 and the feed roller 12a (between the support unit 51 and the support roller 16) as much as possible with respect to the horizontal direction. Tension can be applied more effectively to the supported sublimation transfer paper S, and cockling can be reliably prevented. For this purpose, for example, it is preferable that the support portion 51 protrudes upward as much as possible and the front-rear width of the support portion 51 is formed as narrow as possible.

  As described above, it is possible to print on the sublimation transfer paper S by attaching the convex platen 50 having a simple configuration to the printer device 10. Printing can be performed on both the cloth media N and the sublimation transfer paper S using the printer device 10. Therefore, although it is a simple and inexpensive method, it is possible to print on print media of various materials, and the versatility of the printer apparatus 10 can be improved. Further, as described above, since the sublimation transfer sheet S can be supported in a straight state by the support portion 51, the printer head can be used without considering interference between the printer head 22 and the sublimation transfer sheet S due to cockling. The interval between the sublimation transfer sheet S and the sublimation transfer sheet S can be set to be narrower. Accordingly, it is possible to improve the adhesion position accuracy of the ink ejected from the printer head 22 and reduce the occurrence of floating mist that does not adhere to the sublimation transfer paper S. Therefore, for example, the floating ink does not adhere to the sublimation transfer paper S and becomes dirty, and high-quality printing is possible.

  By the way, as another method of printing on the sublimation transfer paper S while suppressing the influence of cockling using the printer device 10, the ink receiving member 30 is removed when printing on the sublimation transfer paper S. Then, a method of replacing the printing medium (sublimation transfer paper S) with a platen (not shown) configured to be adsorbable and fixed can be considered. According to this method, it is possible to reduce the influence of cockling by adsorbing and fixing the sublimation transfer paper S to the platen, but on the other hand, it is necessary to prepare a platen having a separate adsorption mechanism, and this exchanging work requires a great amount of work time. Therefore, work efficiency will be reduced. As apparent from comparison with this method, the configuration in which the convex platen 50 is attached / detached according to the material of the printing medium is very advantageous in terms of manufacturing cost and work efficiency.

  In the above-described embodiment, the case where the convex platen 50 is mounted and printing is performed on the sublimation transfer paper S is exemplified, but the present invention is not limited to this. By mounting the convex platen 50, the printer device 10 can print on a printing medium (for example, paper or vinyl chloride) made of a material that does not transmit ink other than the sublimation transfer paper S.

  In the above-described embodiment, the configuration using the type of ink that is ejected from the printer head 22 and then cured by contacting (drying) with air is exemplified, but the configuration is not limited thereto. For example, the present invention can also be applied to a printer apparatus using another type of ink such as an ultraviolet curable ink that is cured by being irradiated with ultraviolet light.

  In the above-described printer device 10, the configuration in which the convex platen 50 is attached and detached according to the material of the print medium is illustrated, but the configuration is not limited thereto. For example, when printing is performed on a print medium that does not transmit ink and does not easily cause cockling, a flat plate (not shown) is provided to cover the receiving space 34 of the ink receiving member 30 instead of the convex platen 50. )) Is recommended. Then, by performing printing in a state where the printing medium is supported on the flat plate, printing with relatively high positional accuracy is possible although the printing medium is not attracted and fixed to the flat plate.

  In the above-described embodiment, the configuration example in which the magenta, yellow, cyan, and black printer heads 22 are mounted on the carriage 21 has been described, but the configuration is not limited thereto. For example, the head unit 20 may be configured by additionally mounting, for example, a printer head 22 that discharges white ink for base. In the case of such a configuration, for example, while feeding the unprinted cloth medium N forward, only the white ink is adhered and wound up once by the winding unit 28, and the wound cloth medium N is fed out again to magenta, Printing methods are also possible in which yellow, cyan and black inks are deposited.

N Fabric media (print media)
S Sublimation transfer paper (printing medium)
10 Printer device 12a Feed roller (medium transport mechanism)
15a guide rail 15c pinch roller (medium transport mechanism)
16 Support roller (medium transport mechanism)
22 Printer head 24 Tension arm (upstream tension applying member)
25 Roller (Upstream tension applying member)
26 Tension arm (downstream tension applying member)
27 Roller (downstream tension applying member)
30 Ink receiving member (platen, lower platen)
50 Convex platen (platen, upper platen)
51 Support (opposite support surface)

Claims (4)

A printer head that is movably provided along a guide rail extending in the scanning direction and that discharges ink downward;
A platen located below the printer head;
In a printer apparatus having a medium transport mechanism that places and supports a long print medium, and sends the print medium in a transport direction orthogonal to the scanning direction and is positioned between the printer head and the platen ,
The platen is formed with an opposing support surface that protrudes upward with respect to the medium transport mechanism and faces the lower surface of the printer head,
The print media sent by the media transport mechanism is supported by the platen, and facilities printing by ejecting ink from the printer head to the facing supporting surface by a supporting portion of the print medium,
The platen includes an upper platen on which the opposing support surface is formed, and a lower platen that is provided below the upper platen and can receive ink ejected from the printer head.
The upper platen is configured to be detachable with respect to the lower platen,
When printing using a printing medium through which the attached ink passes, printing is performed with the upper platen removed from the lower platen,
When printing is performed using a printing medium capable of receiving attached ink, the printing is performed with the upper platen attached to the lower platen .   The printer apparatus according to claim 1, further comprising a head position adjusting mechanism that adjusts a height position of the printer head with respect to the guide rail.   The medium transport mechanism is
  An upstream support roller disposed upstream of the platen in the transport direction and extending in the scanning direction;
  A downstream support roller disposed downstream of the platen in the transport direction and extending in the scanning direction;
  The printer apparatus according to claim 1, wherein the upstream support roller and the downstream support roller are disposed so that medium support surfaces for supporting a print medium are substantially horizontal. .   An upstream tension applying member that is disposed upstream of the upstream support roller in the transport direction and applies a tension in a direction opposite to the transport direction to the print medium supported by the medium transport mechanism; ,
  A downstream tension applying member disposed on the downstream side in the transport direction with respect to the downstream support roller and configured to apply tension in the transport direction to the print medium supported by the medium transport mechanism. The printer apparatus according to claim 3.

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