Media drying device and recording device

Abstract

To shorten a dry time of a liquid applied onto a transported long medium efficiently.SOLUTION: A medium dry device 1 dries a liquid applied onto a transported long medium M and includes: a front surface part 111 which contacts with the medium M on a first surface 111A; a heat source unit 120 provided at the second surface 111B side; a take-up unit 5 which takes up the medium M; and a control unit 31 which controls driving of the take-up unit 5. The front surface part 111 is provided with multiple curved parts 130 each of which curves so that the first surface 111 forms a convex shape when viewed in a width direction B. A medium M transport path extending from a downstream side end 21 as seen in a transport direction A of the front surface part 111 and reaching the take-up unit 5 is formed so that the medium M curves at the downstream side end 21 as seen in the width direction B. The control unit 31 controls driving of the take-up unit 5 so that the medium M is crimped to the front surface part 111 at the multiple curved parts 130 and the downstream side end 21 when the medium M is transported.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a medium drying device and a recording device. [Background technology]

[0002] Various media drying devices have been used in the past. Among these, there are those that dry liquid applied to a long medium being transported. Such media drying devices are required to efficiently shorten the drying time. For example, Patent Document 1 discloses an inkjet recording device that includes a heater and a fixing and transport roller that presses a long recording paper being transported against the heater. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 05-104706 Summary of the Invention [Problem to be solved by the invention]

[0004] The inkjet recording device of Patent Document 1 presses the recording paper against a heater using a fixing and transporting roller to shorten the drying time. However, with this configuration, there is a risk that the ink on the recording paper will be transferred to the fixing and transporting roller, or that the recording paper will be damaged by the fixing and transporting roller. For this reason, it is often not possible to adopt a technology like that of the inkjet recording device of Patent Document 1. As such, with conventional medium drying devices, it has been difficult to efficiently shorten the drying time of the liquid applied to the long medium being transported. [Means for solving the problem]

[0005] The medium drying device of the present invention, which solves the above problem, is a medium drying device that dries a liquid applied to a long medium being transported, and includes a surface portion that contacts the medium on a first surface, a heat source portion provided on a second surface side of the surface portion that is the back side of the first surface, a winding portion that is provided downstream of the surface portion in the transport direction of the medium and winds up the medium, and a control unit that controls the drive of the winding portion, wherein the surface portion has a plurality of curved portions that curve so that the first surface is convex when viewed from a width direction that intersects the transport direction, and the transport path of the medium from the downstream end of the surface portion in the transport direction to the winding portion is configured so that the medium is curved at the downstream end when viewed from the width direction, and the control unit controls the drive of the winding portion so that the medium is pressed against the surface portion at the plurality of curved portions and the downstream end when the medium is transported. [Brief explanation of the drawings]

[0006] [Figure 1] 1 is a schematic diagram of a recording apparatus according to an embodiment of the present invention. [Figure 2] FIG. 2 is a block diagram showing the electrical configuration of the recording apparatus shown in FIG. [Figure 3] FIG. 2 is a side view of a heater unit of the recording apparatus shown in FIG. [Figure 4] 2 is a flowchart of an embodiment of a method for driving the recording apparatus of FIG. 1. [Figure 5] 5 is a flowchart of an embodiment of a method for driving the recording apparatus of FIG. 1, different from that of FIG. 4; DETAILED DESCRIPTION OF THE INVENTION

[0007] First, the present invention will be briefly described. In order to solve the above problem, a first aspect of the present invention provides a medium drying device that dries a liquid applied to a long medium being transported, and includes a surface portion that contacts the medium on a first side, a heat source portion that is provided on a second side of the surface portion that is the back side of the first side, a winding portion that is provided downstream of the surface portion in the transport direction of the medium and winds up the medium, and a control unit that controls the drive of the winding portion, wherein the surface portion has a plurality of curved portions that curve so that the first surface is convex when viewed from a width direction that intersects the transport direction, and the transport path of the medium from the downstream end of the surface portion in the transport direction to the winding portion is configured so that the medium is curved at the downstream end when viewed from the width direction, and the control unit controls the drive of the winding portion so that the medium is pressed against the surface portion at the plurality of curved portions and the downstream end when the medium is transported.

[0008] According to this aspect, the surface portion that contacts the medium is provided with multiple curved portions, and the medium transport path is configured so that the medium is curved at the downstream end of the surface portion. Then, as the medium is transported, the medium is pressed against the surface portion at the multiple curved portions and the downstream end. Therefore, the medium is strongly pressed against the curved portions and the downstream end, allowing the transported long medium to be dried efficiently. Therefore, the drying time of the liquid applied to the medium can be efficiently shortened.

[0009] A second aspect of the medium drying device of the present invention is characterized in that, in the first aspect, the curved portion has a planar upstream flat surface portion and a planar downstream flat surface portion that is located downstream in the conveying direction from the upstream flat surface portion.

[0010] According to this aspect, the curved portion has a flat upstream flat portion and a flat downstream flat portion, so that heating can be performed not only at the curved portion between the upstream flat portion and the downstream flat portion, but also at both the flat upstream flat portion and the flat downstream flat portion, thereby enabling particularly efficient drying of the transported long medium.

[0011] The third aspect of the media drying device of the present invention is characterized in that, in the second aspect, the curved portion has a curved surface portion between the upstream flat surface portion and the downstream flat surface portion that forms a curved surface when viewed from the width direction.

[0012] According to this aspect, the curved portion has a curved surface between the upstream flat portion and the downstream flat portion, which increases the contact area with the medium at the curved portion between the upstream flat portion and the downstream flat portion, thereby improving the efficiency of drying the medium at the curved portion.

[0013] The fourth aspect of the media drying device of the present invention is characterized in that, in the second or third aspect, the angle that the downstream flat portion makes on the first surface side with respect to the upstream flat portion when viewed from the width direction in at least one of the multiple curved portions is greater than or equal to 20° and less than 180°.

[0014] According to this aspect, the curved portion has an angle of 20° to 180° between the upstream flat portion and the downstream flat portion on the first surface side when viewed from the width direction. By setting the angle to 20° to 180°, the medium can be pressed particularly strongly against the curved portion. This increases the drying efficiency of the medium at the curved portion.

[0015] A fifth aspect of the medium drying device of the present invention is characterized in that, in any one of the first to fourth aspects, the control unit controls the drive of the winding unit so that, when the medium is transported, a pressure greater than the weight of the medium is applied to the surface portion at the multiple curved portions and the downstream end.

[0016] According to this aspect, when the medium is transported, a pressure greater than the weight of the medium is applied to the surface at the curved portions and the downstream end, which allows the medium to be pressed particularly strongly against the curved portions and the downstream end, thereby improving the drying efficiency of the medium.

[0017] A sixth aspect of the medium drying device of the present invention is characterized in that, in any one of the first to fifth aspects, multiple types of medium can be used, and the control unit controls the pressure with which the medium is pressed against the surface portion at multiple curved portions and the downstream end portion when the medium is transported, depending on the type of medium used.

[0018] According to this aspect, the pressure at which the medium is pressed against the surface portion at the multiple curved portions and the downstream end portion is controlled depending on the type of medium being used. This allows the medium to be pressed against the surface portion with an appropriate pressure depending on the type of medium being used, making it possible to dry long media being transported particularly efficiently.

[0019] A seventh aspect of the medium drying device of the present invention is characterized in that, in any one of the first to sixth aspects, it is provided with a pressure detection unit that detects the pressure at which the medium is pressed against the surface portion, and the control unit feeds back the detection result of the pressure detection unit and controls the pressure at which the medium is pressed against the surface portion at the multiple curved portions and the downstream end portion when the medium is transported.

[0020] According to this aspect, the pressure sensor is provided, and the pressure at which the medium is pressed against the surface portion at the multiple curved portions and the downstream end portion is controlled by feeding back the detection results of the pressure sensor. This allows the medium to be continuously pressed against the surface portion at an appropriate pressure, making it possible to dry long media being transported particularly efficiently.

[0021] The eighth aspect of the medium drying device of the present invention is characterized in that, in any one of the first to seventh aspects, it is provided with a temperature detection unit that detects the temperature of the surface portion, and the control unit controls the pressure with which the medium is pressed against the surface portion at the multiple curved portions and the downstream end portion when the medium is transported, depending on the detection result of the temperature detection unit.

[0022] According to this aspect, a temperature detector is provided, and the pressure at which the medium is pressed against the surface portion at the multiple curved portions and the downstream end portion is controlled based on the detection result of the temperature detector as the medium is transported. This allows the medium to be pressed against the surface portion with an appropriate pressure depending on the temperature of the surface portion, making it possible to dry long media being transported particularly efficiently.

[0023] A recording apparatus according to a ninth aspect of the present invention is characterized by comprising a recording unit that ejects ink as the liquid onto the medium, and any one of the first to eighth medium drying devices.

[0024] According to this aspect, the recording unit that ejects ink is provided, and the medium onto which the ink is applied can be dried, thereby efficiently shortening the drying time of the ink applied to the medium.

[0025] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. First, an overview of a recording device 1 according to an embodiment of the present invention will be described with reference to FIG. 1. Note that in FIG. 1, some components are omitted to make the configuration easier to understand. Here, the X-axis direction in the figure is the horizontal direction in which the shaft portion 3 of the medium setting portion 2 extends, the Y-axis direction is the horizontal direction perpendicular to the X-axis direction, and the Z-axis direction is the vertical direction. In the following, the direction of the arrow is referred to as the + direction, and the direction opposite to the arrow direction is referred to as the - direction. For example, the vertically upward direction is referred to as the +Z direction, and the vertically downward direction is referred to as the -Z direction.

[0026] The recording device 1 of this embodiment includes a medium setting unit 2 that supports a roll R1 around which a sheet-like medium M for recording is wound. In the recording device 1 of this embodiment, when the medium M is transported in the transport direction A, the shaft 3 of the medium setting unit 2 rotates in a rotation direction C. Note that this embodiment uses a roll R1 that is wound so that the recording surface on which recording is performed faces outward; however, if a roll R1 that is wound so that the recording surface faces inward is used, the shaft 3 can rotate in the direction opposite to the rotation direction C to feed the medium M from the roll R1.

[0027] The recording device 1 of this embodiment also includes a transport path for the medium M, which includes a medium support unit 20 that supports the medium M. The recording device 1 also includes a transport roller pair 15, which includes a drive roller 17 and a driven roller 18, for transporting the medium M in the transport path in the transport direction A. In the recording device 1 of this embodiment, the drive roller 17 is configured as a roller that extends in a width direction B that intersects with the transport direction A, and multiple driven rollers 18 are arranged in the width direction B opposite the drive roller 17. However, the configuration of the transport unit for the medium M is not particularly limited.

[0028] The medium support unit 20 is also provided with a heater unit 100 that forms part of the medium support unit 20 and is attached to the recording device 1. Here, the heater unit 100 can be considered to be a component of the recording device 1, and can also be considered to be a medium drying device that dries the medium M. Furthermore, the recording device 1 itself can also be considered to be a medium drying device that includes the heater unit 100 as a component of the recording device 1. Details of the heater unit 100 in this embodiment will be described later. Furthermore, in addition to the heater unit 100 that heats the medium M, the recording device 1 may also be configured to include a medium drying unit that dries the medium M, such as a blower or another heater unit.

[0029] The recording device 1 of this embodiment is also provided with a head 19 as a recording unit that has a plurality of nozzles provided inside the housing 11 and that records by ejecting ink from the nozzles, and a carriage 16 that carries the head 19 and can move back and forth in the width direction B. In the recording device 1 of this embodiment, the transport direction A at the position facing the head 19 on the medium support part 20 is the +Y direction, the movement direction of the head 19 is along the X-axis direction, and the ink ejection direction is the -Z direction.

[0030] Here, a plurality of frames 14 are formed inside the housing 11, and a guide rail 13 is attached to one of the frames and extends along the X-axis direction. A carriage 16 on which a head 19 is provided is attached to the guide rail 13.

[0031] With the above-described configuration, the head 19 can eject ink from nozzles (not shown) onto the transported medium M while moving back and forth in a width direction B that intersects with the transport direction A, thereby performing recording. The recording device 1 of this embodiment can form a desired image on the medium M by repeatedly transporting the medium M in the transport direction A by a predetermined transport amount and ejecting ink while moving the head 19 in the width direction B while the medium M is stopped. However, instead of a head configured in this way, a configuration may be used that includes a so-called line head in which nozzles that eject ink are provided over the entire X-axis direction.

[0032] Further, downstream of the head 19 in the transport direction A, there is provided a winding unit 5 capable of winding up the medium M as a roll R2. Here, the winding unit 5 can also be considered part of the medium drying device. In this embodiment, the medium M is wound up so that the recording surface faces outward, so when winding up the medium M, the shaft 4 of the winding unit 5 rotates in a rotation direction C. On the other hand, when winding up the medium M so that the recording surface faces inward, the shaft 4 can rotate in the opposite direction to the rotation direction C to wind up the medium M.

[0033] Furthermore, a tension bar 21 is provided at the downstream end of the surface portion 111 of the heater unit 100 in the transport direction A, the contact portion with the medium M extending in the width direction B and capable of applying a desired tension to the medium M. Here, as shown in FIG. 1 , the tension bar 21 and the winding unit 5 are arranged such that the transport path of the medium M from the downstream end of the surface portion 111 in the transport direction A to the winding unit 5 curves the medium M at the downstream end of the surface portion 111 in the transport direction A when viewed from the width direction B.

[0034] In the recording device 1 of this embodiment, the tension bar 21 is provided at the downstream end of the surface portion 111 so as to be continuous with the surface portion 111. As such, the tension bar 21 may be provided so as to be continuous with the surface portion 111, or it may be provided at a distance from the surface portion 111. In a configuration in which the tension bar 21 is provided at a distance from the surface portion 111, if the transport direction A seen from the width direction B changes between the surface portion 111 and the tension bar 21, the downstream end of the surface portion 111 becomes the leading edge of the surface portion 111. However, even in a configuration in which the tension bar 21 is provided at a distance from the surface portion 111, if the transport direction A seen from the width direction B does not change between the surface portion 111 and the tension bar 21, the tension bar 21 can be considered to be provided at the downstream end of the surface portion 111.

[0035] Next, the electrical configuration of the recording device 1 of this embodiment will be described. Figure 2 is a block diagram showing the electrical configuration of the recording device 1 of this embodiment. The control unit 31 is provided with a CPU 32 that is responsible for overall control of the recording device 1. The CPU 32 is connected to a storage unit 34 via a system bus 33. The storage unit 34 may include a ROM that stores various control programs executed by the CPU 32 and tables such as Tables 1 to 3 described below, a RAM that can temporarily store data, and an EEPROM, which is a non-volatile memory that can rewrite and store data.

[0036] Here, the CPU 32 is connected via the system bus 33 to a pressure detection unit 35 that detects the pressure with which the medium M is pressed against the surface portion 111. The CPU 32 is also connected via the system bus 33 to a temperature detection unit 36 ​​that detects the temperature of the surface portion 111. The CPU 32 is also connected via the system bus 33 to a head driving unit 37 that drives the head 19.

[0037] The CPU 32 is also connected via the system bus 33 to a motor drive unit 38, which is connected to a carriage motor 39, a transport motor 40, a delivery motor 41, and a winding motor 42. The carriage motor 39 is a motor for moving the carriage 16 carrying the head 19 in the width direction B. The transport motor 40 is a motor for driving the drive roller 17 that constitutes the pair of transport rollers 15. The delivery motor 41 is a rotation mechanism for the shaft 3, and is a motor that drives the shaft 3 to deliver the medium M to the pair of transport rollers 15. The winding motor 22 is a drive motor for rotating the shaft 4 of the winding unit 5.

[0038] The CPU 32 is also connected via the system bus 33 to a heat source driving unit 45 that drives the heat source unit 120 that is the heat source of the heater unit 100. The CPU 32 is also connected via the system bus 33 to an input / output unit 43 that is connected to a PC 44 for transmitting and receiving data such as recording data and signals.

[0039] With this configuration, the control unit 31 of this embodiment is able to control the head 19, drive roller 17, carriage 16, heat source unit 120, winding unit 5, etc. The control unit 31 controls the head 19, drive roller 17, carriage 16, heat source unit 120, winding unit 5, etc., so that the recording device 1 of this embodiment is able to perform recording by heating the surface unit 111 and winding the medium M around the shaft unit 4, while alternately repeating transport of a predetermined amount of the medium M and ejecting ink while moving the head 19 in the width direction B.

[0040] Next, with reference to Figures 1 and 2, as well as Figure 3, the specific configuration of the heater unit 100, which is a main part of the recording apparatus 1 of this embodiment, and its function as a medium drying device in the recording apparatus 1 of this embodiment will be described. The heater unit 100 of this embodiment is a medium drying device that dries ink, which is a liquid, ejected onto the medium M from the head 19 of the recording apparatus 1. However, the heater unit 100 may be used in devices other than the recording apparatus 1 as long as it is intended to dry the long medium M being transported, and may also be used as a medium drying device that dries liquid other than ink applied to the medium M.

[0041] As shown in Fig. 3, the recording device 1 serving as a medium drying device of this embodiment includes a surface portion 111 that contacts the medium M at a first surface 111A. Also, as shown in Fig. 3, the recording device 1 includes a heat source portion 120 provided on a second surface 111B side of the surface portion 111 that is the opposite side to the first surface 111A. Also, as shown in Fig. 1, the recording device 1 includes a winding unit 5 that is provided downstream of the surface portion 111 in the transport direction A of the medium M and winds up the medium M. Also, as shown in Fig. 2, the recording device 1 includes a control unit 31 that controls the driving of the winding unit 5.

[0042] 3, the surface portion 111 is provided with a plurality of curved portions 130, including curved portion 130A and curved portion 130B, that are curved so that the first surface 111A is convex when viewed from the width direction B. As shown in FIG. 1, the medium transport path from the downstream end of the surface portion 111 in the transport direction A to the winding portion 5 is configured so that the medium M is curved at the downstream end when viewed from the width direction B. Here, in the recording device 1 of this embodiment, the control unit 31 controls the driving of the winding portion 5 so that, when the medium M is transported, the medium M is pressed against the surface portion 111 at each of the plurality of curved portions 130, that is, curved portion 130A and curved portion 130B, and at the tension bar 21 provided at the downstream end.

[0043] In this way, the recording device 1 of this embodiment is configured such that a plurality of curved portions 130 are provided on the surface portion 111 that comes into contact with the medium M, and the transport path of the medium M is configured so that the medium M is curved at the downstream end (tension bar 21) of the surface portion 111. Then, as the medium M is transported, the medium M is pressed against the surface portion 111 at the plurality of curved portions 130 and the tension bar 21. Because the recording device 1 of this embodiment is configured in this way, the medium M is strongly pressed against the curved portions 130 and the tension bar 21, and the long medium M being transported can be dried efficiently. Therefore, the recording device 1 of this embodiment can efficiently shorten the drying time of the liquid applied to the medium M.

[0044] Now, from the perspective of the recording device, the recording device 1 of this embodiment is equipped with a head 19 that ejects ink as a liquid onto the medium M, and a heater unit 100 as a medium drying device having the above-described configuration. As described above, the recording device 1 of this embodiment is equipped with the head 19, which is a recording unit that ejects ink, and further equipped with the heater unit 100, and therefore can efficiently shorten the drying time of the ink applied to the medium M.

[0045] 3, the curved portion 130A is configured such that the curved portion 111b is sandwiched between the flat surface portion 111a and the flat surface portion 111c in the transport direction A. Similarly, as shown in FIG. 3, the curved portion 130B is configured such that the curved portion 111d is sandwiched between the flat surface portion 111c and the flat surface portion 111e in the transport direction A. That is, each of the two curved portions 130 has a flat upstream flat portion and a flat downstream flat portion that is provided downstream of the upstream flat portion in the transport direction A. Because the recording device 1 of this embodiment has this configuration, in addition to the curved surface portion 111b and the curved surface portion 111d, which are curved portions between the upstream flat portion and the downstream flat portion, the recording device 1 can heat the upstream flat portion and the downstream flat portion, both of which are flat, and can dry the long medium M being transported particularly efficiently.

[0046] Furthermore, the curved portion 130A has a curved surface portion 111b between the upstream flat portion 111a and the downstream flat portion 111c, forming a curved surface when viewed from the width direction B. Similarly, the curved portion 130B has a curved surface portion 111d between the upstream flat portion 111c and the downstream flat portion 111e, forming a curved surface when viewed from the width direction B. Because the recording device 1 of this embodiment has this configuration, the curved surface portions 111b and 111d, which are curved portions between the upstream flat portion and the downstream flat portion, can have a larger contact area with the medium M, thereby improving the drying efficiency of the medium M in the curved portions. Here, the "curved surface portion" may be a curved surface with a constant curvature or a curved surface with multiple curvatures. As described above, in this embodiment, a curved surface portion is provided between the upstream flat portion and the downstream flat portion, but the present invention is not limited to this configuration. For example, a planar member having a slight curvature may be used in place of the upstream flat portion and the downstream flat portion, or a configuration may be adopted in which a sharp corner portion at the tip is used in place of the curved portion when viewed from the width direction B.

[0047] In at least one of the curved portions 130, the angle that the downstream flat portion makes with respect to the upstream flat portion on the first surface 111A side as viewed from the width direction B is preferably 20° or more and 180° or less. By setting the angle to 20° or more and 180° or less, the medium M can be pressed particularly strongly against the curved portion 130, thereby improving the drying efficiency of the medium M at the curved portion 130. In particular, the angle is preferably 30° or more, and in this embodiment, the angles Θ1 and Θ2 shown in FIG. 3 are both 31°.

[0048] Furthermore, it is preferable that the control unit 31 controls the driving of the winding unit 5 so that, when the medium M is transported, a pressure greater than the weight of the medium M is applied to the surface portion 111 between the multiple curved portions 130 and the tension bar 21, which is the downstream end of the surface portion 111. This is because such control allows the medium M to be pressed particularly strongly against the curved portions 130 and the tension bar 21, thereby improving the drying efficiency of the medium M.

[0049] Next, a driving method that can be executed by the recording device 1 of this embodiment will be described. Fig. 4 is a flowchart of one embodiment of a driving method that can be executed by the recording device 1 of this embodiment. In the flowchart of Fig. 4, first, in step S110, preparations are made for starting recording in the recording device 1. Specifically, this corresponds to the user turning on the power of the recording device 1 and setting the medium M in the recording device 1.

[0050] Next, in step S120, the user inputs the medium M to be used from the PC 44 or an operation panel (not shown), etc. Next, in step S140, winding of the medium M by the winding unit 5 begins. This control is performed by the control unit 31 controlling the winding motor 42 via the motor drive unit 38.

[0051] Next, in step S150, the control unit 31 determines the pressure to be applied to the medium M based on the detection result of the pressure of the medium M pressed against the surface portion 111 by the pressure detection unit 35 and the detection result of the temperature of the surface portion 111 by the temperature detection unit 36. Specifically, the recording apparatus 1 of this embodiment can use multiple types of medium M, and for example, determines the pressure to be applied to the medium M from the detection result of the temperature of the surface portion 111 by the temperature detection unit 36 ​​based on the tables shown in Tables 1, 2, and 3 below. Here, Table 1 corresponds to the case of a thin and soft medium M, Table 2 corresponds to the case of a medium M that is medium thick and medium soft, and Table 3 corresponds to the case of a thick and hard medium M.

[0052] [Table 1]

[0053] [Table 2]

[0054] [Table 3]

[0055] In step S150, the pressure to be applied to the medium M is determined based on the detection result of the temperature of the surface portion 111 by the temperature detection unit 36. However, instead of step S150, a step of determining the temperature of the heat source unit 120 based on the detection result of the pressure of the medium M pressed against the surface portion 111 by the pressure detection unit 35 may be executed.

[0056] Next, in step S190, the winding unit 5 is driven so that the pressure determined in step S150 is applied to the medium M. Specifically, this control is performed by the control unit 31 controlling the winding motor 42 via the motor driving unit 38. Note that steps S150 and S190 continue to be executed as feedback control until the recording that started in step S210, which will be described later, is completed.

[0057] Next, in step S200, a message indicating that recording is now possible is displayed on a monitor or an operation panel (not shown) provided on the PC 44. Then, in step S210, recording begins. Specifically, as described above, the control unit 31 controls the head 19, drive roller 17, carriage 16, heat source unit 120, winding unit 5, and the like, so that the recording device 1 of this embodiment heats the surface unit 111 and winds up the medium M around the shaft unit 4, while alternately conveying the medium M by a predetermined distance and ejecting ink while moving the head 19 in the width direction B, thereby performing recording. As described above, feedback control in steps S150 and S190 continues to be executed while recording is being performed.

[0058] Next, a driving method that can be executed by the recording apparatus 1 of this embodiment, which is different from the driving method shown in the flowchart of Fig. 4, will be described with reference to the flowchart of Fig. 5. In the flowchart of Fig. 5, the same steps as those in the flowchart of Fig. 4 are designated by the same step numbers, and their explanation will be omitted below.

[0059] 5, after step S120, the process proceeds to step S140 via step S130. In step S130, the control unit 31 controls the heat source unit driving unit 45 to drive the heat source unit 120 and start heating the surface unit 111. Furthermore, following step S140, the process proceeds to step S160.

[0060] In step S160, control unit 31 determines whether the heating temperature of heat source unit 120 is appropriate based on the temperature of surface unit 111 detected by temperature detection unit 36. Whether the heating temperature of heat source unit 120 is appropriate can be determined, for example, by comparing it with a set value input by the user via PC 44 or an operation panel (not shown). If control unit 31 determines in step S160 that the heating temperature of heat source unit 120 is appropriate, the process proceeds to step S180. On the other hand, if control unit 31 determines in step S160 that the heating temperature of heat source unit 120 is not appropriate, the process proceeds to step S170, where it changes the heating temperature of heat source unit 120 and returns to step S160, repeating steps S160 and S170 until control unit 31 determines that the heating temperature of heat source unit 120 is appropriate.

[0061] In step S180, the control unit 31 determines whether the tension applied to the medium M by the winding unit 5 is appropriate based on the detection result of the pressure of the medium M pressed against the surface portion 111 by the pressure detection unit 35. Whether the tension applied to the medium M is appropriate can be determined, for example, by comparing it with a setting value input by the user via the PC 44 or an operation panel (not shown). If the control unit 31 determines in step S180 that the detection result of the pressure of the medium M is appropriate, the process proceeds to step S210. On the other hand, if the control unit 31 determines in step S180 that the detection result of the pressure of the medium M is not appropriate, the process proceeds to step S190, where the winding unit 5 is driven in step S190 to change the tension applied to the medium M, and the process returns to step S180. Steps S180 and S190 are repeated until the control unit 31 determines that the detection result of the pressure of the medium M is appropriate.

[0062] As described above, the recording device 1 of this embodiment can use multiple types of medium M. As shown in step S150 of the flowchart in Fig. 4, the control unit 31 can control the pressure with which the medium M is pressed against the surface portion 111 at the multiple curved portions 130 and the tension bar 21 at the downstream end when the medium M is transported, depending on the type of medium M being used. Therefore, the recording device 1 of this embodiment can press the medium M against the surface portion 111 with an appropriate pressure depending on the type of medium M being used, and can dry long-sized medium M being transported particularly efficiently.

[0063] As described above, the recording apparatus 1 of this embodiment is also equipped with a pressure detection unit 35 that detects the pressure with which the medium M is pressed against the surface portion 111. The control unit 31 then feeds back the detection results of the pressure detection unit 35, as shown in steps S150 and S190 of the flowchart in FIG. 4, for example, and can control the pressure with which the medium M is pressed against the surface portion 111 at the multiple curved portions 130 and the tension bar 21 at the downstream end as the medium M is transported. Therefore, the recording apparatus 1 of this embodiment can keep the medium M pressed against the surface portion 111 with an appropriate pressure, and can dry long-sized media M being transported particularly efficiently.

[0064] As described above, the recording device 1 of this embodiment is also equipped with a temperature detection unit 36 ​​that detects the temperature of the surface portion 111. The control unit 31 can control the pressure with which the medium M is pressed against the surface portion 111 at the multiple curved portions 130 and the tension bar 21 at the downstream end when the medium M is transported, in accordance with the detection results of the temperature detection unit 36, as represented, for example, in steps S150 and S190 of the flowchart in FIG. 4. Therefore, the recording device 1 of this embodiment can press the medium M against the surface portion 111 with an appropriate pressure in accordance with the temperature of the surface portion 111, and can dry long-sized media M being transported particularly efficiently.

[0065] The present invention is not limited to the above-described embodiments, and can be realized in various configurations without departing from the spirit of the present invention. Furthermore, the technical features in the embodiments corresponding to the technical features in each aspect described in the Summary of the Invention section can be appropriately replaced or combined to solve some or all of the above-described problems or achieve some or all of the above-described effects. Furthermore, if a technical feature is not described as essential in this specification, it can be deleted as appropriate. [Explanation of symbols]

[0066] 1...recording device (medium drying device), 2...medium setting section, 3...shaft section, 4...shaft section, 5...winding section, 11...casing section, 12...mounting section, 13...guide rail, 14...frame, 15...transport roller pair, 16...carriage, 17...drive roller, 18...followed roller, 19...head (recording section), 20...medium support section, 21...tension bar (downstream end), 31...control section, 32...CPU, 33...system bus, 34...memory section, 35...pressure detection section, 36...temperature detection section, 37...head drive section, 38...motor - drive unit, 39... carriage motor, 40... transport motor, 41... feed motor, 42... take-up motor, 43... input / output unit, 44... PC, 45... heat source drive unit, 100... heater unit, 111... surface unit, 111a... flat unit, 111b... curved unit, 111c... flat unit, 111d... curved unit, 111e... flat unit, 111A... first surface, 111B... second surface, 120... heat source unit, 130... curved unit, 130A... curved unit, 130B... curved unit, 131... downstream end, M... medium, R1... roll body, R2... roll body

Claims

1. A medium drying device for drying a liquid applied to a conveyed long medium, comprising: a surface portion on a first side that contacts the medium; a heat source unit provided on a second surface side of the front surface portion, the second surface being an opposite surface to the first surface; a take-up section that is provided downstream of the surface section in the transport direction of the medium and that takes up the medium; a control unit that controls the driving of the winding unit; a temperature detection unit for detecting the temperature of the surface portion, the surface portion is provided with a plurality of curved portions that are curved so that the first surface has a convex shape when viewed in a width direction that intersects with the conveying direction, a transport path of the medium from a downstream end of the surface portion in the transport direction to the winding portion is configured such that the medium is curved at the downstream end as viewed in the width direction; the control unit controls the driving of the winding unit so that the medium is pressed against the surface portion at the plurality of curved portions and the downstream end portion when the medium is transported; The control unit controls the driving of the winding unit to change the pressure at which the medium is pressed against the surface portion at the multiple curved portions and the downstream end portion when the medium is transported, depending on the detection results of the temperature detection unit.

2. The media drying device according to claim 1, A medium drying device characterized in that the curved portion has a flat upstream flat portion and a flat downstream flat portion that is provided downstream of the upstream flat portion in the conveying direction.

3. 3. The media drying device according to claim 2, The medium drying device according to claim 1, wherein the curved portion has a curved surface portion that forms a curved surface when viewed in the width direction between the upstream flat surface portion and the downstream flat surface portion.

4. The media drying device according to claim 2 or 3, A media drying device characterized in that the angle that the downstream flat portion forms on the first surface side with respect to the upstream flat portion when viewed from the width direction in at least one of the multiple curved portions is greater than or equal to 20° and less than 180°.

5. The media drying device according to any one of claims 1 to 4, The control unit controls the driving of the winding unit so that, when the medium is transported, a pressure greater than the pressure per unit area due to the medium's own weight is applied to the surface portion at the multiple curved portions and the downstream end.

6. The media drying device according to any one of claims 1 to 5, Multiple types of media can be used, A medium drying device characterized in that the control unit changes the pressure at which the medium is pressed against the surface portion at the multiple curved portions and the downstream end portion when the medium is transported, depending on the type of medium used, by controlling the drive of the winding unit.

7. The media drying device according to any one of claims 1 to 6, a pressure detection unit that detects the pressure with which the medium is pressed against the surface portion, The control unit feedback-controls the detection results of the pressure detection unit, and changes the pressure at which the medium is pressed against the surface portion at the multiple curved portions and the downstream end portion when the medium is transported by controlling the drive of the winding unit.

8. a recording unit that ejects ink as the liquid onto the medium; A recording apparatus comprising: the medium drying device according to claim 1 .

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