Recording device

Abstract

To solve the problem that there is room for improvement in a standpoint that a printing surface has to be dried efficiently, since a surface at the opposite side of a printing surface of a paper is contacted with a heat sink, in a conventional inkjet recording device.SOLUTION: A recording device comprises: a liquid discharge head that discharges liquid to a medium to perform recording on the medium; a discharging path through which a surface of the medium having the recording performed thereon by the liquid discharge head is curved inward to reverse the medium; an inside path forming part that is a member forming the inside of the discharging path, which is formed in a curved shape; and a heat generating part that generates heat by electric power consumption. A plurality of holes are formed in the inside path forming part, and the heat generating part is arranged to face the inside path forming part, inside the discharging path.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a recording device for recording on a medium. [Background technology]

[0002] In an inkjet recording device, if the paper that has been printed and discharged is not dried, the next paper to be discharged may rub against the paper on the discharge tray, causing a deterioration in recording quality. Also, if the paper is discharged and not dried, the curl of the paper may increase as the paper dries, and the next paper to be discharged may collide with the paper that has already been discharged, causing a loss of alignment. For this reason, a technique has been proposed for drying the paper before it is discharged. In the inkjet recording device described in Patent Document 1, the heat sink is configured to also serve as a guide for sending out paper after printing has been completed. The carrier motor is in contact with the heat sink, and the heat of the carrier motor is transferred to the heat sink to dry the paper. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-108326 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the inkjet recording device described in Patent Document 1, the paper is configured so that the surface opposite to the printed surface is in contact with the heat sink, and there is room for improvement in terms of efficiently drying the printed surface. [Means for solving the problem]

[0005] In order to solve the above problems, the recording device of the present invention comprises a liquid ejection head which ejects liquid onto a medium to record, a discharge path which inverts the medium by curving the surface of the medium recorded by the liquid ejection head so that it faces inward, an inner path forming portion which is a member that forms the inside of the discharge path and has a curved shape, and a heating portion which generates heat by consuming power, wherein a plurality of holes are formed in the inner path forming portion, and the heating portion is positioned inside the discharge path facing the inner path forming portion. [Brief description of the drawings]

[0006] [Figure 1] FIG. [Diagram 2] A view of the printer's media transport path from the left side of the device. [Diagram 3] FIG. 4 is a block diagram showing a control system of the printer. [Figure 4] A view of the printer's media transport path from the right side of the device. [Diagram 5] FIG. 2 is a diagram illustrating the components of the printer. [Figure 6] FIG. 4 is a plan view showing an arrangement of each component relative to a first path forming member. [Figure 7] A diagram showing part of the printer's media transport path from the right side of the device. [Figure 8] FIG. 13 is a perspective view of an eighth path forming portion. [Figure 9] A diagram showing part of the printer's media transport path from the right side of the device. [Figure 10] 13 is a diagram showing the positional relationship between a second substrate, a power supply unit, and an eighth path formation portion. FIG. [Figure 11] A diagram showing part of the printer's media transport path from the right side of the device. [Figure 12] 4 is a flowchart showing a flow of control executed by a control unit. [Figure 13] A diagram showing temperature and humidity classifications. [Figure 14] Table showing the relationship between environmental classification and release rate. [Figure 15]A diagram showing part of the printer's media transport path from the right side of the device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] The present invention will now be briefly described. The recording device of the first aspect comprises a liquid ejection head which ejects liquid onto a medium to record, a discharge path which inverts the medium by curving the surface of the medium recorded by the liquid ejection head so that it faces inward, an inner path forming portion which is a member that forms the inside of the discharge path and has a curved shape, and a heating portion which generates heat by consuming power, wherein a plurality of holes are formed in the inner path forming portion, and the heating portion is positioned inside the discharge path facing the inner path forming portion.

[0008] According to this aspect, the inner path forming portion is formed with a plurality of holes, and the heat generating portion is disposed inside the discharge path facing the inner path forming portion, so that the heat generated in the heat generating portion can be transferred to the medium transported along the discharge path by radiation or convection via the holes. The medium is then curved in the discharge path with the surface of the medium on which recording has been performed facing inward, so that the heat generated in the heat generating portion acts directly on the surface of the medium on which recording has been performed, and the surface on which recording has been performed can be effectively dried. In addition, since the discharge path is curved, the path length is increased, and the heat generating section is disposed inside the discharge path, a path length for drying can be secured, and the heat generated by the heat generating section can be utilized efficiently. In addition, the space inside the discharge path can be effectively utilized, which contributes to miniaturization of the device. In addition, when recording is performed on both sides of a medium, curving the medium with the recorded side facing inward means curving the medium with the side on which recording was last performed facing inward.

[0009] A second aspect is an aspect dependent on the first aspect, characterized in that the heat generating portion includes a substrate having electronic components. According to this aspect, since the heat generating portion includes a substrate having electronic components, a good amount of heat can be generated.

[0010] A third aspect is an aspect dependent on the first or second aspect, characterized in that the heat generating portion includes a power supply unit that supplies electric power. According to this aspect, since the heat generating portion includes a power supply unit that supplies electric power, a good amount of heat can be generated.

[0011] A fourth aspect is an aspect dependent on the second aspect, and is characterized in that the electronic component is provided on a surface of the substrate facing the inner path formation portion. According to this aspect, since the electronic component is provided on the surface of the substrate facing the inner path forming portion, heat generated by the electronic component can be efficiently transferred to the medium. In addition, the space between the inner path forming portion and the substrate can be effectively utilized, which contributes to miniaturization of the device. Incidentally, this aspect is not limited to the above-mentioned second aspect, and may be subordinate to the above-mentioned third aspect.

[0012] A fifth aspect is an aspect dependent on the first aspect, and is characterized in that it comprises a medium transport path facing the liquid ejection head, the medium transport path being a recording time transport path that transports the medium in a first direction, a guide path that is located below the recording time transport path and receives the medium from the discharge path that connects to the recording time transport path and guides it in a second direction opposite to the first direction, a medium transport path that connects to the guide path and has an inversion path that inverts the medium and merges with the recording time transport path, a lower path forming portion that forms a lower surface of the recording time transport path, and an upper path forming portion that forms an upper surface of the guide path, the heat generating portion being a first heat generating portion, and further comprising a second heat generating portion that generates heat by consuming power, the second heat generating portion being positioned at a position sandwiched between the lower path forming portion and the upper path forming portion.

[0013] According to the present aspect, the second heating section is positioned at a position sandwiched between the lower path forming section and the upper path forming section, so that the heat generated by the second heating section can be transmitted to the medium guided along the guide path via the upper path forming section, thereby enabling the medium to be dried in the guide path. Furthermore, since the guide path receives the medium from the discharge path which is connected to the recording time transport path and guides it in a second direction opposite to the first direction, the medium can be dried continuously on the discharge path and the guide path, thereby making it possible to dry the medium even more reliably. Furthermore, the space between the recording transport path and the reversing path can be effectively utilized, and the device can be made compact. Incidentally, this aspect is not limited to the above-mentioned first aspect, and may be subordinate to any of the above-mentioned second to fourth aspects.

[0014] A sixth aspect is an aspect dependent on the fifth aspect, characterized in that the second heat generating portion includes a plurality of motors. According to this aspect, since the second heat generating portion includes a plurality of motors, a better amount of heat can be obtained.

[0015] A seventh aspect is an aspect dependent on the first aspect, and is characterized in that the distance between the heat generating portion and the liquid ejection head is longer than the distance between the heat generating portion and the inner path forming portion.

[0016] According to the present aspect, the distance between the heating portion and the liquid ejection head is longer than the distance between the heating portion and the inner path forming portion, so that the medium transported through the ejection path can be dried well while preventing the heat generated by the heating portion from adversely affecting the liquid ejection head. The distance between the heat generating portion and the liquid ejection head means the shortest distance between the heat generating portion and the liquid ejection head. Similarly, the distance between the heat generating portion and the inner path forming portion means the shortest distance between the heat generating portion and the inner path forming portion. Incidentally, this aspect is not limited to the above-mentioned first aspect, and may be subordinate to any of the above-mentioned second to sixth aspects.

[0017] An eighth aspect is an aspect dependent on the first aspect, and is characterized in that the device further includes a fan that causes gas containing heat generated in the heat generating portion to flow toward the inner path forming portion. According to this aspect, since a fan is provided that flows gas containing heat generated in the heat generating portion toward the inner path forming portion, the medium transported through the discharge path can be dried satisfactorily. Incidentally, this aspect is not limited to the above-mentioned first aspect, and may be subordinate to any of the above-mentioned second to seventh aspects.

[0018] A ninth aspect is an aspect dependent on the first aspect, and is characterized in that it includes a control unit that controls the transport of the medium in the discharge path, and the control unit controls the transport of the medium in the discharge path in accordance with recording conditions.

[0019] According to the present aspect, a control unit is provided that controls the transport of the medium in the discharge path, and the control unit controls the transport of the medium in the discharge path in accordance with the recording conditions, thereby making it possible to appropriately dry the medium using the discharge path. Incidentally, this aspect is not limited to the above-mentioned first aspect, and may be subordinate to any of the above-mentioned second to eighth aspects.

[0020] A tenth aspect is an aspect dependent on the ninth aspect, and is characterized in that it includes a temperature and humidity detection unit that detects temperature and humidity, and the recording conditions include whether or not to record on both sides of the medium, a recording duty value, and temperature and humidity, and the control unit performs recording on only one side of the medium, and when the recording duty value exceeds a predetermined value and the temperature and humidity are in accordance with the predetermined conditions, performs drying wait control to stop the medium in the discharge path and dry it.

[0021] According to this aspect, the control unit records on only one side of the medium, and when the recording duty value exceeds a predetermined value and the temperature and humidity are in accordance with predetermined conditions, performs drying wait control to stop the medium in the discharge path and dry it, thereby making it possible to more reliably dry the medium using the discharge path under conditions in which curling of the medium is likely to occur, and ultimately to effectively suppress curling of the medium.

[0022] An eleventh aspect is an aspect dependent on the ninth aspect, and is characterized in that it includes a temperature and humidity detection unit that detects temperature and humidity, the recording conditions include temperature and humidity, the control unit holds information related to a first conveying speed corresponding to the temperature and humidity, and information related to a second conveying speed corresponding to the recording mode, and when the recording mode is a high image quality mode, the control unit compares the first conveying speed with the second conveying speed, and adopts the second conveying speed when the first conveying speed exceeds the second conveying speed, and adopts the first conveying speed when the first conveying speed is equal to or lower than the second conveying speed.

[0023] When the recording mode is a high image quality mode, if the medium feed speed is faster than the speed corresponding to the recording mode, damage may be formed on the medium along the medium transport path, and the desired recording quality may not be obtained. According to this aspect, when the recording mode is a high image quality mode, the control unit compares the first conveying speed with the second conveying speed, and when the first conveying speed exceeds the second conveying speed, adopts the second conveying speed according to the recording mode, thereby obtaining appropriate recording quality. Furthermore, when the first transport speed is equal to or lower than the second transport speed, the first transport speed is adopted, so that the medium can be appropriately dried in the discharge path.

[0024] The present invention will be specifically described below. The following describes an inkjet printer 1, which is a recording device that records on a medium such as recording paper. Hereinafter, the inkjet printer 1 will be referred to simply as the printer 1. In the XYZ coordinate system shown in each drawing, the X-axis direction is the width direction of the device, which is the width direction of the medium on which recording is performed. As seen by the operator of the printer 1, the +X direction is the left direction and the -X direction is the right direction. The Y axis direction is the depth direction of the device, and is the direction along the medium transport direction during recording. The -Y direction is the direction from the front of the device to the rear of the device, and is the medium transport direction during recording, and is an example of a first direction. The +Y direction is the direction from the rear of the device to the front of the device, and is an example of a second direction opposite to the first direction. In this embodiment, of the sides that make up the periphery of the printer 1, the side in the +Y direction is the front of the device, and the side in the -Y direction is the rear of the device. The Z-axis direction is the vertical direction, which is the device height direction. The +Z direction is the vertically upward direction, and the -Z direction is the vertically downward direction. In the following description, the direction in which the medium is transported may be referred to as "downstream" and the opposite direction may be referred to as "upstream."

[0025] 1, the printer 1 has an outer shell formed by a housing 30. The housing 30 has a front surface 30a, a right side surface 30b, a left side surface 30c, a top surface 30d, and a rear surface 30e. The front portion of the medium storage cassette 2 is exposed on the front surface 30a. The medium storage cassette 2 is an example of a medium storage section, and is configured to be able to store media before feeding. The medium storage cassette 2 can be removed from the printer 1 by pulling it out in the +Y direction, and can be installed in the printer 1 by pushing it in the -Y direction. In FIG. 1, the symbol Pt indicates the media stored in the medium storage cassette 2.

[0026] A recess 30f is provided on the top surface 30d. The bottom surface of the recess 30f is configured as the discharge tray 29. The discharge tray 29 is formed so as to be inclined upward in the +Y direction. An outlet 30g is provided inside the recess 30f so as to open in the +Y direction. The medium on which recording has been performed is discharged from the outlet 30g in the +Y direction and is supported by the discharge tray 29 and the top surface 30d.

[0027] A waste liquid tray 33, which is an example of a waste liquid storage section, is provided on the top surface 30d. The waste liquid tray 33 is a tray that stores waste ink generated during maintenance of the line head 40, which will be described later, and can be removed from the printer 1 by lifting it up from the top surface 30d in the +Z direction, and can be attached to the printer 1 by dropping it in the -Z direction.

[0028] Next, the medium transport path of the printer 1 will be described with reference to FIG. The printer 1 has a first feeding path R1a, a second feeding path R1b, a reversing path R2, a recording transport path R3, a guide path R4, and a discharge path R5 as medium transport paths for transporting the medium. In FIG. 2, these paths are indicated by two-dot chain lines. The first feeding path R1a is a path from the pick roller 3 at the bottom to the first nip roller 9. The second feeding path R1b is a path from the medium support unit 12 at the top to the first conveying roller pair 15 via the feeding roller 13. The reversing path R2 is a path from the first nip roller 9 to the second nip roller 10. The recording conveying path R3 is a path from the second nip roller 10 to the third conveying roller pair 27. The guide path R4 is a path from the third conveying roller pair 27 to the first nip roller 9 via the fourth conveying roller pair 65. The discharge path R5 is a path from the third conveying roller pair 27 to the discharge port 30g.

[0029] Among these, the transport path R3 during recording is a path facing the line head 40, and guides the medium in the -Y direction, which is an example of the first direction. Note that guiding the medium in the -Y direction does not necessarily mean that the medium transport direction is straight along the -Y direction, but rather means that it includes a -Y direction component. The guide path R4 is a medium transport path located below the recording transport path R3, and guides the medium that has exited from the recording transport path R3 in the +Y direction, which is an example of the second direction. Note that guiding the medium in the +Y direction does not necessarily mean that the medium transport direction is straight along the +Y direction, but rather means that it includes a +Y direction component. The reversing path R2 is a medium transport path that connects with the guide path R4, and turns the medium over to join the recording transport path R3. The discharge path R5 is located downstream of the recording transport path R3, and is a path for discharging the medium on which recording has been performed from a discharge port 30g.

[0030] A more detailed explanation is given below. The printer 1 is provided with the above-mentioned medium storage cassette 2 at the bottom of the device. A pick roller 3 is provided on the upper part of the medium storage cassette 2. The pick roller 3 can advance and retreat with respect to the medium Pt stored in the medium storage cassette 2, and rotates in contact with the medium Pt stored in the medium storage cassette 2 to send the medium out of the medium storage cassette 2 in the +Y direction.

[0031] A rotationally driven feed roller 5 and a separation roller 6 to which a rotational torque is applied by a torque limiter (not shown) are provided downstream of the pick roller 3. The medium sent out from the medium storage cassette 2 is nipped between the feed roller 5 and the separation roller 6, whereby the medium is separated and sent further downstream.

[0032] A reversing roller 8 that is driven to rotate is provided downstream of the feeding roller 5 and the separation roller 6. A first nip roller 9, a second nip roller 10, and a third nip roller 11 are provided around the reversing roller 8. Each nip roller is a roller that can be rotated by being driven. The medium is nipped between the reversing roller 8 and the first nip roller 9, and is further nipped between the reversing roller 8 and the second nip roller 10 and transported. The medium is reversed by the reversing roller 8 and transported downstream. In this embodiment, the reversing roller 8 is a large diameter roller whose outer periphery forms the inside of the reversing path R2, but is not limited to this. The outside and inside of the reversing path R2 may be formed by a path forming member, and the reversing roller 8 may be a small diameter roller arranged opposite each nip roller.

[0033] A first transport roller pair 15 is provided downstream of the reversing roller 8, and includes a first drive roller 16 that is driven to rotate, and a first driven roller 17 that is rotatable in response to the first drive roller 16. The medium is transported by a first transport roller pair 15 to a position facing the line head 40 . Incidentally, the printer 1 is capable of feeding a medium from the medium storage cassette 2, i.e., feeding using the first feeding path R1a, as well as feeding a medium from the medium support unit 12, i.e., feeding using the second feeding path R1b. The medium support unit 12 supports the medium in an inclined position, and the supported medium is transported by the feeding roller 13 to the first transport roller pair 15. Reference numeral 14 denotes a separation roller to which a rotational torque is applied by a torque limiter (not shown).

[0034] The line head 40 is a liquid ejection head that ejects ink, which is an example of a liquid, onto a medium to record, and is an example of a recording unit. The line head 40 is a liquid ejection head in which a plurality of nozzles 44 that eject ink are arranged to cover the entire area in the width direction of the medium. The line head 40 is long in the width direction of the medium, and is configured as a liquid ejection head that can record over the entire width of the medium without moving in the width direction of the medium. The head surface 42 faces the medium and can also be called a liquid ejection surface or a nozzle surface. The printer 1 includes an ink storage section 47 (see FIG. 5), and the ink ejected from the line head 40 is supplied from the ink storage section 47 to the line head 40 via an ink tube (not shown).

[0035] A second transport roller pair 19 including a second drive roller 20 that is driven to rotate and a second driven roller 21 that can be driven to rotate is provided downstream of the line head 40. The medium on which recording has been performed is sent downstream by the second transport roller pair 19.

[0036] Here, the lower surface of the recording-time transport path R3 is formed by a first path forming part 51, which is an example of a lower path forming part. In this embodiment, the first path forming part 51 is formed by a single member having a shape extending in the -Y direction from a position facing the line head 40, and extending in the +Y direction from a position facing the line head 40. In the transport path R3 during recording, a portion of the upper surface upstream of the first transport roller pair 15 is formed by a third path forming portion 53, and the medium is guided to the first transport roller pair 15 by the third path forming portion 53 and the first path forming portion 51. In the transport path R3 during recording, the upper surface downstream of the second transport roller pair 19 is formed by a fourth path forming portion 54, and the medium on which recording has been performed is guided to the third transport roller pair 27 by the fourth path forming portion 54 and the first path forming portion 51. Incidentally, the first path forming portion 51, the third path forming portion 53, and the fourth path forming portion 54 may each be formed of one member or a plurality of members.

[0037] A shutter 46 is provided at a position facing the line head 40 on the recording transport path R3. The shutter 46 can take a blocking position ( FIG. 2 ) facing the head surface 42 and an open position (not shown) retracted from the position facing the head surface 42 by sliding along the Y-axis direction. When in the blocking position, the shutter 46 supports the medium, thereby defining a gap between the medium and the head surface 42. Hereinafter, the gap between the shutter 46 and the head surface 42 may be referred to as a platen gap.

[0038] The line head 40 is provided so as to be movable toward and away from the shutter 46, i.e., in the direction of adjusting the platen gap. In this embodiment, the direction of adjusting the platen gap is parallel to the Z-axis direction. Hereinafter, movement of the line head 40 in the +Z-axis direction may be referred to as "rising," and movement in the -Z direction may be referred to as "descending."

[0039] The cap unit 38 is provided below the shutter 46. The cap unit 38 includes a cap portion 39. The cap portion 39 is switchable between a state in which it covers the head surface 42 and a state in which it is spaced apart from the head surface 42. The cap unit 38 is disposed so as to be displaceable between an elevated position and a lowered position.

[0040] When recording on the medium, the control unit 80 (see FIG. 3) maintains the shutter 46 and the cap unit 38 in the state shown in FIG. 2, that is, the shutter 46 in the closed position and the cap unit 38 in the lowered position. When the head surface 42 is to be covered by the cap portion 39 from this state, the control unit 80 moves the shutter 46 from the shielding position to the open position. Then, the cap unit 38 is raised. This causes the cap portion 39 to cover the head surface 42. When performing maintenance on the line head 40, the control unit 80 covers the head surface 42 with the cap portion 39 when the device is powered off, when the device is powered on and in a recording standby state, etc. In this embodiment, the cap unit 38 moves up and down to cause the cap section 39 to cover the head surface 42, but the cap unit 38 may be fixedly provided, and the cap section 39 may cover the head surface 42 when the line head 40 moves down from the recording position. Alternatively, the cap section 39 may cover the head surface 42 when the line head 40 moves down and the cap unit 38 moves up.

[0041] Next, a flap 22 is provided downstream of the recording transport path R3. The flap 22 is provided so as to be swingable around a swing shaft 22a by a power source (not shown), such as a power source such as a solenoid. When the -Y direction tip of the flap 22 descends, the medium transported along the recording transport path R3 is sent to the discharge path R5. When the -Y direction tip of the flap 22 ascends, the medium transported in reverse along the discharge path R5 can be sent to the guide path R4. The flap 22 is not limited to being driven by a power source, and may be biased by a spring so as to maintain a posture in which the -Y direction tip ascends. In this case, the tip of the medium proceeding downstream from the recording transport path R3 pushes aside the flap 22 and enters the discharge path R5.

[0042] In this embodiment, the ejection path R5 is a path for curving the medium so that the side on which recording has been performed faces inward, inverting it, and ejecting it from the ejection port 30g. When recording is performed on both sides of the medium, curving the side on which recording has been performed faces inward means curving the medium so that the side on which recording has been performed last faces inward. At the same time, the ejection path R5 is also a path for switching back the medium in order to feed the medium to the guide path R4.

[0043] The inside of the discharge path R5 is formed by an eighth path forming portion 58 having a curved shape convex in the -Y direction, and the outside of the discharge path R5 is formed by a ninth path forming portion 59 having a curved shape convex in the -Y direction. The eighth path forming portion 58 is an example of an inner path forming portion. The eighth path forming portion 58 and the ninth path forming portion 59 may each be formed of one member or multiple members.

[0044] The discharge path R5 is provided with a third transport roller pair 27 including a third drive roller 27a that is driven to rotate and a third driven roller 27b that is rotatable in response to the third drive roller 27a. Further, downstream of the third transport roller pair 27 in the discharge path R5, a fifth transport roller pair 28 including a fifth drive roller 28a that is driven to rotate and a fifth driven roller 28b that is rotatable in response to the rotation of the fifth drive roller 28a is provided.

[0045] When the third transport roller pair 27 and the fifth transport roller pair 28 rotate forward, the medium is discharged from the discharge port 30g. After the rear end of the medium passes the third transport roller pair 27, when the third transport roller pair 27 and the fifth transport roller pair 28 rotate in the reverse direction while the leading end of the flap 22 in the -Y direction is raised, the end that was the rear end of the medium becomes the leading end, and the medium is sent into the guide path R4.

[0046] The guide path R4 is provided with a fourth transport roller pair 65 including a fourth drive roller 66 that is driven to rotate and a fourth driven roller 67 that is rotatable in response to the rotation of the fourth drive roller 66. The medium sent into guide path R4 is guided between reversing roller 8 and third nip roller 11 by fourth transport roller pair 65, and is sent into reversing path R2 by reversing roller 8 and third nip roller 11.

[0047] Reference numeral 52 denotes a second path forming portion, which is an example of an upper path forming portion, that forms the upper surface of the guide path R4, and reference numeral 55 denotes a fifth path forming portion that forms the lower surface of the guide path R4. The second path forming portion 52 has its -Y direction end facing the flap 22, and slopes downward from its -Y direction end toward the +Y direction, then extends horizontally toward the +Y direction, before slopes upward so that its +Y direction end faces the reversing roller 8. The fifth path forming portion 55 has its -Y direction end facing the third drive roller 27a, and slopes downward from its -Y direction end toward the +Y direction, then extends horizontally toward the +Y direction, after which it slopes upward so that its +Y direction end faces the third nip roller 11. The second path forming portion 52 and the fifth path forming portion 55 may be formed of one member or a plurality of members.

[0048] Next, a control system including a motor provided in the printer 1 will be described with reference to FIG. The control unit 80 includes a CPU, non-volatile memory, and the like (not shown), and executes various control programs stored in the non-volatile memory to perform various controls of the printer 1. The control unit 80 also controls a number of motors that the printer 1 is equipped with. The reversing motor 81 controlled by the control unit 80 is a power source for the pick roller 3, the feed roller 5, the reversing roller 8, and the feed roller 13. The reversing motor 81 transmits power to the pick roller 3 via a power transmission unit m1a. Unless otherwise specified, the power transmission unit m1a and other power transmission units described later can be configured with known power transmission means such as gears and drive belts. The reversing motor 81 also transmits power to the feed roller 5 via a power transmission unit m1b. The reversing motor 81 also transmits power to the reversing roller 8 via a power transmission unit m2. The reversing motor 81 also transmits power to the feed roller 13 via a power transmission unit m3.

[0049] The transport motor 82 controlled by the control unit 80 is the power source for the first drive roller 16 , the second drive roller 20 , and the fourth drive roller 66 . The transport motor 82 transmits power to the first drive roller 16 via a power transmission unit m4. The transport motor 82 also transmits power to the second drive roller 20 via a power transmission unit m5. The transport motor 82 also transmits power to the fourth drive roller 66 via a power transmission unit m6.

[0050] The discharge motor 83 controlled by the control unit 80 is a power source for the third drive roller 27a and the fifth drive roller 28a. The discharge motor 83 transmits power to the third drive roller 27a via a power transmission unit m7, and also transmits power to the fifth drive roller 28a via a power transmission unit m8.

[0051] The pump motor 84 controlled by the control unit 80 drives the pump unit 32. The pump unit 32 sends ink from the cap portion 39 of the cap unit 38 to the waste liquid tray 33. Therefore, the cap portion 39 and the pump unit 32 are connected by an ink tube (not shown), and the pump unit 32 and the waste liquid tray 33 are also connected by an ink tube (not shown). The pump motor 84 transmits power to the pump unit 32 via a power transmission section m9.

[0052] The head drive motor 85 controlled by the control unit 80 is a power source for raising and lowering the line head 40 in the direction of adjusting the platen gap. The head drive motor 85 raises and lowers the line head 40 via a power transmission unit m10. The power transmission unit m10 can be configured, for example, by a rack and pinion mechanism including a rack (not shown) provided on the line head 40 and a pinion (not shown) that meshes with the rack, and the head drive motor 85 rotates the pinion. A guide frame 31 (see FIG. 2) is disposed in the +Y direction relative to the line head 40, and the line head 40 is guided by the guide frame 31 in the Z-axis direction.

[0053] The shutter drive motor 86 controlled by the control unit 80 is a power source for moving the shutter 46 in the Y-axis direction. The shutter drive motor 86 moves the shutter 46 via a power transmission unit m11. The power transmission unit m11 can be configured, for example, by a rack and pinion mechanism including a rack (not shown) provided on the shutter 46 and a pinion (not shown) that meshes with the rack, and the shutter drive motor 86 rotates the pinion. The power source for the shutter 46 is not limited to the dedicated shutter drive motor 86, and power may be obtained from another motor, for example, the transport motor 82.

[0054] The cap drive motor 87 controlled by the control unit 80 is a power source for raising and lowering the cap unit 38 along the Z-axis direction. The cap drive motor 87 raises and lowers the cap unit 38 via a power transmission unit m12. The power transmission unit m12 can be configured, for example, by a rack and pinion mechanism including a rack (not shown) provided on the cap unit 38 and a pinion (not shown) that meshes with the rack, and the cap drive motor 87 rotates the pinion. The power source for the cap unit 38 is not limited to the dedicated cap drive motor 87, and power may be obtained from another motor, for example, the head drive motor 85.

[0055] The wiper drive motor 88 controlled by the control unit 80 is a power source for moving the wiper unit 36 ​​along the X-axis direction. Here, the wiper unit 36 ​​includes a wiper 37 formed of an elastic material such as rubber as shown in FIG. 5. The wiper unit 36 ​​can move in the X-axis direction by the power of the wiper drive motor 88, and at that time, the wiper 37 wipes the head surface 42 of the line head 40. The wiper unit 36 ​​has a home position at the end in the -X direction. Reference numeral 36-1 denotes the wiper unit 36 ​​moving from the home position toward the end in the +X direction, and reference numeral 37-1 denotes the wiper 37 at that time.

[0056] A first board 90 is provided at the home position of the wiper unit 36 ​​(see also FIG. 1). The first board 90 constitutes a part of the control unit 80, and is equipped with electronic components such as integrated circuits, capacitors, diodes, and transistors (not shown). An opening 90a is provided in this first substrate 90, and when the wiper unit 36 ​​is located at the home position, the wiper unit 36 ​​is located inside the opening 90a so as not to interfere with the wiper unit 36 ​​and the first substrate 90. With this configuration, the dimension of the printer 1 in the X-axis direction can be reduced.

[0057] Returning to FIG. 3, the wiper drive motor 88 moves the wiper unit 36 ​​by means of a power transmission unit m13. The power transmission unit m13 is configured to include, for example, a drive pulley (not shown) provided at one end in the X-axis direction, a driven pulley (not shown) provided at the other end, and an endless belt (not shown) that is wound around the drive pulley and the driven pulley. The wiper unit 36 ​​is fixed to a part of the endless belt. The wiper drive motor 88 rotates the drive pulley.

[0058] Of the above motors, the reversing motor 81, the transport motor 82, and the ejection motor 83 are motors involved in transporting the medium, and are the motors that operate for the longest period of time among the multiple motors equipped in the printer 1, and therefore generate the most heat.

[0059] Next, the arrangement of the reversing motor 81, the conveying motor 82, and the ejection motor 83 will be described with reference to FIGS. First, a description will be given of the arrangement of the reversing motor 81. As shown in Fig. 2, the reversing motor 81 is arranged at a position sandwiched between the first path forming portion 51 and the second path forming portion 52. The position sandwiched between the first path forming portion 51 and the second path forming portion 52 can also be rephrased as a position sandwiched between the recording-time transport path R3 and the guide path R4. As a result, the first path forming portion 51 is located between the reversing motor 81 and the line head 40, which can prevent heat generated in the reversing motor 81 from being transmitted to the line head 40 by radiation, and can prevent heat generated by the reversing motor 81 from adversely affecting the line head 40. Hereinafter, this is referred to as a first effect related to the reversing motor 81.

[0060] In addition, since the reversing motor 81 is disposed at a position sandwiched between the first path forming portion 51 and the second path forming portion 52 and is covered by the first path forming portion 51, the operating sound of the reversing motor 81 is less likely to leak from the top surface of the device. Hereinafter, this is referred to as a second effect related to the reversing motor 81. In addition, the heat generated by the reversing motor 81 acts on the guide path R4, thereby increasing the temperature inside the guide path R4 and promoting the drying of the medium onto which the ink has been ejected. Hereinafter, this is referred to as the third effect of the reversing motor 81. It is possible to obtain any one, two, or all of the first, second, and third operational effects related to the reversing motor 81. Furthermore, by disposing the reversing motor 81 at a position sandwiched between the first path forming portion 51 and the second path forming portion 52, it is possible to effectively utilize the space between the recording transport path R3 and the guide path R4, and it is possible to miniaturize the device.

[0061] In this embodiment, as shown in Fig. 6, at least the motor body 81a of the reversing motor 81 does not protrude in the X-axis direction, i.e., in the width direction, beyond the first path forming part 51 when viewed in the Z-axis direction, i.e., in the normal direction to the surface of the medium transported along the recording transport path R3. In Fig. 6, the symbol X1 indicates the range in the width direction occupied by the first path forming part 51, and the symbol X2 indicates the range occupied by the motor body 81a. With this configuration, the device dimensions in the width direction can be effectively reduced. The symbol 81b indicates the motor shaft. In addition, since the entire motor main body 81a is covered by the first path forming portion 51, the first effect or the second effect related to the reversing motor 81 can be effectively obtained.

[0062] In the present embodiment, the reversing motor 81 has the motor body 81a entirely covered by the first path forming part 51, but only a part of the motor body 81a may be covered by the first path forming part 51. In the present embodiment, the motor shaft 81b is partially covered by the first path forming part 51, but only the motor shaft 81b may be entirely covered by the first path forming part 51.

[0063] The reversing motor 81 may be configured to be in contact with the second path forming portion 52. This configuration allows the heat generated by the reversing motor 81 to be effectively transferred to the second path forming portion 52, and the drying of the medium transported through the guide path R4 can be further promoted. In this case, the second path forming portion 52 is formed from a material with good thermal conductivity, such as a metal material, so that the heat generated by the reversing motor 81 can be more effectively transferred to the second path forming portion 52. Furthermore, by forming the second path forming portion 52 from a material with good thermal conductivity, such as a metal material, and at the same time forming the first path forming portion 51 from a material with low thermal conductivity, such as a resin material, the drying of the medium transported through the guide path R4 can be further promoted, and the adverse effect of heat generated by the reversing motor 81 on the line head 40 can be effectively suppressed.

[0064] Next, the arrangement of the discharge motor 83 will be described. The discharge motor 83 is arranged at a position sandwiched between the first path forming portion 51 and the second path forming portion 52 as shown in Fig. 2. This positions the first path forming portion 51 between the discharge motor 83 and the line head 40, making it possible to suppress the heat generated by the discharge motor 83 from being transmitted to the line head 40 by radiation, and to suppress the heat generated by the discharge motor 83 from adversely affecting the line head 40. Hereinafter, this is referred to as a first effect related to the discharge motor 83.

[0065] In addition, the discharge motor 83 is disposed at a position sandwiched between the first path forming portion 51 and the second path forming portion 52, and is covered by the first path forming portion 51, so that the operating sound of the discharge motor 83 is less likely to leak from the top surface of the device. Hereinafter, this is referred to as a second effect related to the discharge motor 83. In addition, the heat generated by the discharge motor 83 acts on the guide path R4, thereby increasing the temperature inside the guide path R4 and promoting the drying of the medium onto which the ink has been ejected. Hereinafter, this is referred to as the third effect of the discharge motor 83. It is possible to obtain any one, two, or all of the first, second, and third operational effects related to the ejection motor 83. Furthermore, by disposing the ejection motor 83 at a position sandwiched between the first path forming portion 51 and the second path forming portion 52, it is possible to effectively utilize the space between the recording transport path R3 and the guide path R4, and it is possible to miniaturize the device.

[0066] In this embodiment, as shown in Fig. 6, at least the motor main body 83a of the discharge motor 83 does not protrude in the X-axis direction, i.e., in the width direction, beyond the first path forming portion 51 when viewed in the Z-axis direction, i.e., in the normal direction to the surface of the medium transported along the recording transport path R3. In Fig. 6, the symbol X3 indicates the area occupied by the motor main body 83a. With this configuration, the device dimension in the width direction can be effectively reduced. The symbol 83b indicates the motor shaft. In addition, since the entire motor main body 83a is covered by the first path forming portion 51, the first effect or the second effect related to the discharge motor 83 can be effectively obtained. In the present embodiment, the discharge motor 83 has the motor body 83a entirely covered by the first path forming portion 51, but only a portion of the motor body 83a may be covered by the first path forming portion 51. In the present embodiment, the motor shaft 83b is partially covered by the first path forming portion 51, but only a portion of the motor shaft 83b may be covered by the first path forming portion 51.

[0067] The discharge motor 83 may be configured to be in contact with the second path forming portion 52. This configuration allows the heat generated by the discharge motor 83 to be effectively transferred to the second path forming portion 52, and the drying of the medium transported through the guide path R4 can be further promoted. In this case, the second path forming portion 52 is formed from a material with good thermal conductivity, such as a metal material, so that the heat generated by the discharge motor 83 can be more effectively transferred to the second path forming portion 52. Furthermore, by forming the second path forming portion 52 from a material with good thermal conductivity, such as a metal material, and at the same time forming the first path forming portion 51 from a material with low thermal conductivity, such as a resin material, the drying of the medium transported through the guide path R4 can be further promoted, and the heat generated by the discharge motor 83 can be effectively prevented from adversely affecting the line head 40.

[0068] Next, the arrangement of the feed motor 82 will be described. The feed motor 82 is arranged at a position sandwiched between the first path forming part 51 and the second path forming part 52 as shown in Fig. 4. This positions the first path forming part 51 between the feed motor 82 and the line head 40, making it possible to prevent heat generated by the feed motor 82 from being transmitted to the line head 40 by radiation, and to prevent heat generated by the feed motor 82 from adversely affecting the line head 40. Hereinafter, this is referred to as a first effect related to the feed motor 82.

[0069] In addition, since the conveyor motor 82 is disposed at a position sandwiched between the first path forming portion 51 and the second path forming portion 52 and is covered by the first path forming portion 51, the operating sound of the conveyor motor 82 is less likely to leak from the top surface of the device. Hereinafter, this is referred to as a second effect related to the conveyor motor 82. In addition, the heat generated by the transport motor 82 acts on the guide path R4, thereby increasing the temperature inside the guide path R4 and promoting the drying of the medium onto which the ink has been ejected. Hereinafter, this is referred to as the third effect of the transport motor 82. It is possible to obtain any one, two, or all of the first, second, and third operational effects related to the transport motor 82. Furthermore, by disposing the transport motor 82 at a position sandwiched between the first path forming portion 51 and the second path forming portion 52, it is possible to effectively utilize the space between the recording transport path R3 and the guide path R4, and it is possible to miniaturize the device.

[0070] 6, the motor body 82a of the transport motor 82 protrudes slightly in the X-axis direction, i.e., in the width direction, from the first path forming portion 51 when viewed in the Z-axis direction, i.e., in the normal direction to the surface of the medium transported along the transport path R3 during recording. In FIG. 6, the reference symbol X4 indicates the range occupied by the motor body 82a. Also, the reference symbol 82b indicates the motor shaft. However, at least the motor body 82a may be disposed so as not to protrude in the X-axis direction, i.e., the width direction, beyond the first path forming portion 51. With such a configuration, the device dimension in the width direction can be effectively reduced. In addition, since a portion or all of the motor main body 82a is covered by the first path forming portion 51, the first or second functional effect related to the conveyor motor 82 can be effectively obtained. In this embodiment, the entire motor shaft 82b protrudes from the first path forming portion 51 in the X-axis direction, i.e., the width direction, but a portion of the motor shaft 82b may be covered by the first path forming portion 51, or the entire motor shaft 82b may be covered by the first path forming portion 51.

[0071] The conveyor motor 82 may be configured to be in contact with the second path forming portion 52. This configuration allows the heat generated by the conveyor motor 82 to be effectively transferred to the second path forming portion 52, and the drying of the medium conveyed through the guide path R4 can be further promoted. In this case, the second path forming portion 52 is formed from a material with good thermal conductivity, such as a metal material, so that the heat generated by the conveyor motor 82 can be more effectively transferred to the second path forming portion 52. Furthermore, by forming the second path forming portion 52 from a material with good thermal conductivity, such as a metal material, and at the same time forming the first path forming portion 51 from a material with low thermal conductivity, such as a resin material, the drying of the medium conveyed through the guide path R4 can be further promoted, and the heat generated by the conveyor motor 82 can be effectively prevented from adversely affecting the line head 40.

[0072] Next, the arrangement of the waste liquid tray 33, the pump motor 84, and the pump unit 32 will be described. 2 and 4, a guide frame 31 that guides the line head 40 in the Z-axis direction is provided in the +Y direction with respect to the line head 40. The guide frame 31 is a frame that forms a surface parallel to the XZ plane, and is made of a metal material. The waste liquid tray 33, the pump motor 84, and the pump unit 32 are arranged in the +Y direction relative to the guide frame 31.

[0073] The pump motor 84 is disposed below the waste liquid tray 33. As a result, heat generated by the pump motor 84 is transferred to the waste liquid tray 33 by radiation and convection, and drying inside the waste liquid tray 33 can be promoted without using a separate component such as a heat sink, thereby suppressing an increase in the cost of the device. By promoting drying inside the waste liquid tray 33, the amount of waste liquid that can be stored in the waste liquid tray 33 can be increased. In this embodiment, the pump motor 84 is disposed directly below the waste liquid tray 33 in a position facing the lower surface of the waste liquid tray 33 . 6, reference symbol X5 denotes an area in the width direction occupied by the waste liquid tray 33, and reference symbol X7 denotes an area in the width direction occupied by the pump motor 84. As shown in the figure, the pump motor 84 does not protrude in the width direction from the waste liquid tray 33 when viewed from the Z axis direction. In addition, the pump motor 84 does not protrude in the Y axis direction from the waste liquid tray 33 when viewed from the Z axis direction. However, a part of the pump motor 84 may protrude from the waste liquid tray 33 in the width direction, or in the Y-axis direction.

[0074] The pump unit 32 is disposed alongside the pump motor 84 below the waste liquid tray 33. This allows the power transmission section m9 (see FIG. 3) that transmits power from the pump motor 84 to the pump unit 32 to be made compact. 6, the symbol X6 indicates an area in the width direction that is occupied by the pump unit 32. As shown in the figure, the pump unit 32 does not protrude in the width direction from the waste liquid tray 33 when viewed in the Z axis direction. In addition, the pump unit 32 does not protrude in the Y axis direction from the waste liquid tray 33 when viewed in the Z axis direction. However, a part of the pump unit 32 may protrude from the waste liquid tray 33 in the width direction or in the Y-axis direction. Also, the waste liquid tray 33 and the pump unit 32 do not have to overlap when viewed from the Z-axis direction.

[0075] In addition, the guide frame 31 separates the pump motor 84 from the line head 40. This makes it possible to prevent heat generated by the pump motor 84 from adversely affecting the line head 40.

[0076] 1 and 5, a first substrate 90 is provided on the side of the waste liquid tray 33. The first substrate 90 is a heat source, and is configured so that heat generated on the first substrate 90 is transferred to the waste liquid tray 33 by radiation and convection. Therefore, drying inside the waste liquid tray 33 can be further promoted without using a separate component such as a heat sink.

[0077] A power supply unit 91, which is a power supply source for the device, is provided at the bottom of the device, facing the first substrate 90. The power supply unit 91 is also a heat source, and is configured so that heat generated by the power supply unit 91 is transferred to the waste liquid tray 33 by convection. This can further promote drying inside the waste liquid tray 33.

[0078] 5, the first substrate 90 and the power supply unit 91 are disposed at the end in the -X direction in the device width direction, and the ink containing section 47 is disposed at the end in the +X direction in the device width direction. In other words, the ink containing section 47 is disposed at a distance from the first substrate 90 and the power supply unit 91, which are heat sources that generate significant heat. Here, when the ink ejected from the line head 40 is heated, the viscosity of the ink may deviate from the range of suitable viscosity for ejection, which may result in problems such as ejection defects. However, since the ink storage section 47 is disposed at a distance from the first substrate 90 and the power supply unit 91 as described above, it is possible to prevent the above-mentioned problems such as ejection defects from occurring.

[0079] The pump motor 84 may be in contact with the lower surface of the waste liquid tray 33. This allows the heat generated by the pump motor 84 to be transferred to the waste liquid tray 33 by conduction in addition to radiation and convection, further accelerating drying inside the waste liquid tray 33.

[0080] 2 and 4, a heat generating part He that generates heat by consuming electric power is provided inside the discharge path R5 at a position facing the eighth path forming part 58. The heat generating part He may be any type that generates heat by consuming electric power. Specific examples of the heat generating part He will be described later. 8, a plurality of holes 58a are formed in the eighth path formation portion 58. The holes 58a are provided at intervals along the medium transport direction and also provided at intervals along the medium width direction.

[0081] Since the heat generating part He is disposed inside the curvature of the eighth path forming part 58 and facing the eighth path forming part 58, the heat generated in the heat generating part He can be transferred to the medium transported along the discharge path R5 by radiation or convection via the holes 58a. Then, since the medium is curved in the discharge path R5 with the surface of the medium on which recording has been performed facing inward, the heat generated in the heat generating part He acts directly on the surface of the medium on which recording has been performed, and the surface on which recording has been performed can be effectively dried. In addition, the discharge path R5 is curved, which increases the path length, and the heat generating part He is disposed inside the discharge path R5. Therefore, the path length required for drying can be secured, and the heat generated by the heat generating part He can be utilized efficiently. In addition, the space inside the discharge path R5 can be effectively utilized, which contributes to the miniaturization of the device.

[0082] 2 and 4, reference symbol D1 is the distance between the heat generating portion He and the line head 40, and reference symbol D2 is preferably longer than the distance between the heat generating portion He and the eighth path forming portion 58. In this embodiment, distance D1 is longer than distance D2. The distance D1 between the heat generating part He and the line head 40 means the shortest distance between the heat generating part He and the line head 40, and is not necessarily the distance along the Y-axis direction. Similarly, the distance between the heat generating part He and the eighth path forming part 58 means the shortest distance between the heat generating part He and the eighth path forming part 58, and is not necessarily the distance along the Y-axis direction. In this way, the distance D1 is longer than the distance D2, so that the heat generated by the heat generating portion He can be prevented from adversely affecting the line head 40, and the medium transported through the discharge path R5 can be dried satisfactorily.

[0083] Next, a first embodiment of the heat generating portion He will be described with reference to FIG. The heat generating part He can be configured to include a second substrate 92 having an electronic component 93. The electronic component 93 is an electronic component such as an integrated circuit, a capacitor, a diode, or a transistor. The second substrate 92 constitutes the control unit 80 (see FIG. 3) together with the first substrate 90 (see FIG. 5). Note that the first substrate 90 may be omitted, and the control unit 80 may be constituted by the second substrate 92 alone. In this manner, by configuring the heat generating portion He to include the second substrate 92 having the electronic components 93, a good amount of heat can be obtained.

[0084] Furthermore, in this embodiment, the electronic component 93 is provided on the surface of the second substrate 92 in the -Y direction, i.e., the surface facing the eighth path formation portion 58. This allows the heat generated by the electronic component 93 to be efficiently transferred to the medium. In addition, the electronic component 93 can be disposed by effectively utilizing the space between the eighth path formation portion 58 and the second substrate 92, which contributes to miniaturization of the device.

[0085] In this embodiment, as described above, the reversing motor 81, the conveying motor 82, and the discharging motor 83 are disposed at a position sandwiched between the first path forming portion 51 and the second path forming portion 52. If the above-mentioned heat generating portion He is regarded as the first heat generating portion, and each of the above motors is regarded as the second heat generating portion, then the second heat generating portion is disposed at a position sandwiched between the first path forming portion 51 and the second path forming portion 52. In a configuration in which the second heat generating portion is arranged at a position sandwiched between the first path forming portion 51 and the second path forming portion 52, the heat generated in the second heat generating portion can be transmitted to the medium guided along the guide path R4 via the second path forming portion 52, thereby enabling the medium to be dried along the guide path R4. Furthermore, since the guide path R4 is a path that receives the medium from the discharge path R5 that connects to the recording-time transport path R3 and guides it in the +Y direction, the medium can be dried continuously on the discharge path R5 and the guide path R4, making it possible to more reliably dry the medium. In this configuration, it is also preferable to provide the second path forming portion 52 with a hole 58a (see FIG. 8) similar to the eighth path forming portion 58. This allows the heat generated in the second heat generating portion to be transferred to the medium guided through the guide path R4 by radiation or convection.

[0086] Furthermore, when the second heat generating portion is composed of a plurality of motors as in this embodiment, a better amount of heat can be obtained.

[0087] As shown in Fig. 9, the heat generating unit He is a unit that supplies power to each part of the printer 1 that consumes power, and can be configured to include a power supply unit 91 that itself consumes power. This makes it possible to obtain a good amount of heat generation. The configuration in Fig. 9 is a modified version of the power supply unit 91 shown in Fig. 5. In the embodiment shown in Fig. 9, the heat generating part He includes a second substrate 92 and a power supply unit 91, which can be arranged side by side in the X-axis direction, i.e., the medium width direction, as shown in Fig. 10. In Fig. 10, the symbol Wp indicates the area through which the largest medium in the medium width direction passes, and by arranging the second substrate 92 and the power supply unit 91 side by side, the heat generating part He is provided over the entire area Wp. This allows the medium to be dried well regardless of the size of the medium. The heat generating portion He may be provided so as to cover the entire area Wp without any gaps. Also, only the second substrate 92 may be provided so as to cover the entire area Wp, or only the power supply unit 91 may be provided so as to cover the entire area Wp.

[0088] 11, a fan 95 may be provided to flow gas containing heat generated in the heat generating portion He toward the eighth path forming portion 58. This allows the medium transported through the discharge path R5 to be satisfactorily dried.

[0089] In this embodiment, the heat generating part He is a member that forms the inside of the discharge route R5, which is a curved route, and is disposed at a position facing the curved eighth route forming part 58, but is not limited to this, and may be disposed at a position facing a route forming part that faces the nearest recording surface, for example, a route forming part that forms a straight line. Also, the route forming part may be provided with a hole similar to the hole 58a shown in FIG.

[0090] Next, the control executed by the control unit 80 will be described. The control unit 80, which controls the transport of the medium on the discharge path R5, controls the transport of the medium on the discharge path R5 in accordance with the recording conditions. This allows the medium to be appropriately dried using the discharge path R5. This will be described in more detail below.

[0091] The printer 1 is equipped with a temperature and humidity detection unit 89 (see FIG. 7), and the control unit 80 can acquire temperature and humidity information from the temperature and humidity detection unit 89. Although the temperature and humidity detection unit 89 is provided inside the device, it may be provided outside the device, or it may be provided both inside and outside the device and the values ​​may be averaged, for example. The control unit 80 performs the control shown in Fig. 12 according to the acquired temperature and humidity information and other information. Fig. 12 shows the control for drying the medium by using the discharge path R5. First, if the recording mode is a mode other than the high-speed mode (No in step S101), the control unit 80 proceeds to step S102, and if the recording mode is the high-speed mode (Yes in step S101), the control unit 80 skips steps S102 and onwards and ends the process.

[0092] Here, the printer 1 according to this embodiment has three recording modes: high-quality mode, normal mode, and high-speed mode. These recording modes are merely examples, and it goes without saying that other recording modes may be provided. The user can select the recording mode at the time of printing via a user interface (not shown). At least the recording-time transport path R3 and the medium transport speed downstream thereof differ depending on the recording mode. The high-quality mode has the slowest medium transport speed, and the high-speed mode has the fastest medium transport speed. The medium transport speeds corresponding to these recording modes are stored as information in a non-volatile memory (not shown) constituting the control unit 80.

[0093] Next, in step S102, the control unit 80 determines whether the medium type is a medium to be dried. A medium to be dried is a medium that is prone to curling when ink is ejected, and for which it is preferable to perform a drying process even more, and an example of this is plain paper. The user can select the medium type at the time of printing via a user interface (not shown). If the medium type is a medium to be dried (Yes in step S102), the process proceeds to step S103, and if the medium type is not a medium to be dried (No in step S102), steps S103 and after are omitted and the process ends.

[0094] Next, the control unit 80 determines whether or not double-sided recording is to be performed in step S103, and if double-sided recording is to be performed (Yes in step S103), the process ends without performing steps S104 and onward. This is because when double-sided recording is performed, the difference in moisture amount between the first and second sides of the medium is small, and curling is unlikely to occur. On the other hand, in the case of single-sided recording (No in step S103), the difference in moisture amount between the first and second sides of the medium is large and curling is likely to occur, so the process proceeds to step S104.

[0095] Next, the control unit 80 obtains the recording duty value (step S104). Here, the print duty value is the ratio of ink coverage per unit area of ​​the print surface, and for example, a print duty value of 50% means that 50% of the unit area of ​​the print surface is covered with ink. Also, as an example, the print duty value in step S104 is the highest print duty value when printing multiple pages. However, instead of using the highest print duty value, the print duty values ​​of the multiple pages may be averaged and used. Then, the control unit 80 judges whether the recording duty value is equal to or greater than the drying target value (step S105). The drying target value is stored as information in a non-volatile memory (not shown) constituting the control unit 80. If the print duty value is equal to or greater than the drying target value (Yes in step S105), in other words if a large amount of ink is ejected and the medium is noticeably wet, the control unit 80 proceeds to step S106. However, if the print duty value is less than the drying target value (No in step S105), the control unit 80 skips steps S106 and onward and ends the process.

[0096] Next, the control unit 80 acquires temperature and humidity information in step S106. FIG. 13 shows regions divided according to temperature and humidity, with the vertical axis H representing humidity (%) and the horizontal axis T representing temperature (° C.). 13, the humidity is divided into those below humidity H1 and those below humidity H2, and the temperature is divided into those below temperature T1 and those below temperature T2. As an example, the humidity H1 can be set to 35%, the humidity H2 can be set to 45%, the temperature T1 can be set to 18°, and the temperature T2 can be set to 25°C. As described above, according to the temperature and humidity, area RA, area RB, area RC, area RD, area RE, area RF, area RG, area RH, and area RJ are partitioned as area R.

[0097] Next, the control unit 80 acquires a first transport speed Va corresponding to the temperature and humidity information (step S107). The first transport speed Va corresponding to the temperature and humidity information is stored as information in a non-volatile memory (not shown) constituting the control unit 80. Here, the first transport speed Va is the medium transport speed when recording is performed on the medium and the medium is discharged to the discharge tray 29 via the discharge path R5, in other words, the discharge speed.

[0098] Fig. 14 shows an example of the first conveying speed Va corresponding to the temperature and humidity information. The first conveying speed Va corresponding to the temperature and humidity information is set for each region R. In the example of Fig. 14, a speed V1 is set for the regions RG and RH, a speed V2 is set for the regions RA, RB, RC, and RJ, and a speed V3 is set for the regions RD, RE, and RF. In this embodiment, speed V1 is the slowest and speed V3 is the fastest. In a low temperature and low humidity environment, the difference in moisture content between the first and second sides is likely to be the largest and curling is likely to be significant, so the slowest speed V1 is set for areas RG and RH.

[0099] Next, the control unit 80 acquires the second transport speed Vb corresponding to the recording mode (step S108). The second transport speed Vb corresponding to the recording mode is stored as information in a non-volatile memory (not shown) constituting the control unit 80. Normally, when the temperature and humidity information is not taken into consideration, the medium is discharged to the discharge tray 29 via the discharge path R5 at the second transport speed Vb corresponding to the recording mode. Among the high-quality mode, normal mode, and high-speed mode, the high-quality mode has the slowest second transport speed Vb, and the high-speed mode has the fastest second transport speed Vb. If the recording mode is the high-quality mode, and the first transport speed Va is faster than the second transport speed Vb, damage may be formed on the medium on the discharge path R5, and the desired recording quality may not be obtained.

[0100] Therefore, when the recording mode is the high-quality mode (No in step S101), the control unit 80 compares the first transport speed Va with the second transport speed Vb, and adopts the second transport speed Vb when the first transport speed Va exceeds the second transport speed Vb, and adopts the first transport speed Va when the first transport speed Va is equal to or less than the second transport speed Vb. That is, the lower of the first transport speed Va and the second transport speed Vb is selected, and transport is performed at that speed (step S109). Of course, when the first transport speed Va and the second transport speed Vb are equal, either one may be adopted. In this way, the first transport speed Va and the second transport speed Vb are compared, and when the first transport speed Va exceeds the second transport speed Vb, the second transport speed Vb according to the recording mode is adopted, thereby making it possible to obtain appropriate recording quality. Furthermore, when the first transport speed Va is equal to or lower than the second transport speed Vb, the first transport speed Va is adopted, so that the medium can be appropriately dried on the discharge path R5.

[0101] Next, the control unit 80 determines whether the temperature and humidity acquired in step S106 are the temperature and humidity for waiting for drying (step S110). As described above, curling of the medium is most likely to occur in a low temperature and low humidity environment, and as an example, the region RG is set as the target temperature and humidity for waiting for drying. Information on which of the regions is the target temperature and humidity for waiting for drying is stored in a non-volatile memory (not shown) constituting the control unit 80. If the acquired environmental temperature and humidity are the drying wait target temperature and humidity (Yes in step S110), the control unit 80 performs drying wait control (step S111).

[0102] Drying wait control is performed by stopping transport of the medium when the rear end Pe of the medium is located slightly downstream of the third transport roller pair 27 as shown in Fig. 15, and inserting a predetermined wait time. This wait time is stored as information in a non-volatile memory (not shown) that constitutes the control unit 80. Note that only one wait time may be set, or the wait time may be set according to the recording duty value. In this case, the higher the recording duty value, the longer the wait time. This allows the rear end region of the medium to remain on the discharge path R5, allowing the rear end region of the medium to be dried well. By drying the rear end region of the medium well, curling of the rear end region of the medium when the medium is discharged to the discharge tray 29 is suppressed, and it is possible to suppress obstruction to the discharge of subsequent media.

[0103] As described above, when the control unit 80 controls the transport of the medium on the discharge path R5 according to the recording conditions, the recording conditions include whether or not to record on both sides of the medium, the recording duty value, and temperature and humidity, and the control unit 80 records on only one side of the medium, and if the recording duty value exceeds a predetermined value (Yes in step S105) and the temperature and humidity are in accordance with the predetermined conditions (Yes in step S110), the control unit 80 performs drying wait control to stop the medium on the discharge path R5 and dry it (step S111). This makes it possible to more reliably dry the medium using the discharge path R5 under conditions in which the medium is likely to curl, and ultimately makes it possible to suitably suppress curling of the medium.

[0104] The present invention is not limited to the embodiments and modifications described above, but various modifications are possible within the scope of the invention described in the claims, and it goes without saying that these modifications are also included in the scope of the present invention. [Explanation of symbols]

[0105] 1...inkjet printer, 2...media storage cassette, 3...pick roller, 5...feed roller, 6...separation roller, 8...reversal roller, 9...first nip roller, 10...second nip roller, 11...third nip roller, 12...media support section, 13...feed roller, 14...separation roller, 15...first conveying roller pair, 16...first driving roller, 17...first driven roller, 19...second conveying roller pair, 20...second driving roller, 21...second driven roller, 22...flap, 22a...oscillating shaft, 27...third conveying roller pair, 27a...third driving roller, 27b...third driven roller, 28...fifth conveying roller pair, 28a...fifth driving roller, 28b...fifth driven roller, 29...discharge tray, 30...casing, 30a...front, 30b...right side, 30c...left side, 30d...top, 30e...rear, 30f...recess, 30g...discharge port, 31...guide frame, 32...pump unit, 33...waste liquid tray, 36...wiper unit, 37...wiper, 38...cap unit, 39...cap portion, 40...ra In-head, 42...head surface, 44...nozzle, 46...shutter, 47...ink storage section, 51...first path forming section, 51a...guide hole, 51b...upstream end, 51c...downstream end, 52...second path forming section, 53...third path forming section, 54...fourth path forming section, 55...fifth path forming section, 56...sixth path forming section, 57...seventh path forming section, 58...eighth path forming section, 58a...hole, 59...ninth path forming section, 65...fourth conveying roller pair, 66...fourth driving roller, 67...fourth driven roller, 80...control section, 81...reverse Repurposed motor, 81a...motor main body, 81b...motor shaft, 82...transport motor, 82a...motor main body, 82b...motor shaft, 83...ejection motor, 83a...motor main body, 83b...motor shaft, 84...pump motor, 85...head drive motor, 86...shutter drive motor, 87...cap drive motor, 88...wiper drive motor, 89...temperature and humidity detection unit, 90...first board, 90a...opening, 91...power supply unit, 92...second board, 93...electronic components, 95...fan, He...heat generating portion, R1a...first feeding path, R1b...second feeding path, R2...reversing path, R3...transport path during recording, R4...guiding path, R5...ejection path

Claims

1. a liquid ejection head that ejects liquid onto a medium for recording; a discharge path that turns over the medium by curving the medium with the surface of the medium recorded by the liquid ejection head facing inward; An inner path forming portion that is a member that forms the inside of the discharge path and has a curved shape; A heat generating unit that generates heat by consuming power; Equipped with A plurality of holes are formed in the inner passage forming portion, The heat generating portion is disposed inside the discharge path so as to face the inner path forming portion. A recording device comprising:

2. 2. The recording apparatus according to claim 1, The heat generating portion includes a substrate having electronic components. A recording device comprising:

3. 3. The recording apparatus according to claim 1, The heat generating unit includes a power supply unit for supplying power. A recording device comprising:

4. 3. The recording apparatus according to claim 2, The electronic component is provided on a surface of the substrate facing the inner path forming portion. A recording device comprising:

5. 2. The recording apparatus according to claim 1, a recording transport path that faces the liquid ejection head and transports a medium in a first direction; a guide path that is a medium transport path located below the transport path during recording, the guide path receiving the medium from the discharge path that is connected to the transport path during recording and guiding the medium in a second direction opposite to the first direction; a medium transport path connected to the guide path, the medium being transported in a reverse direction so that the medium is transported in a reverse direction to be transported in a reverse direction to be transported in a recording mode; a lower path forming portion that forms a lower surface of the recording transport path; an upper path forming portion that forms an upper surface of the guide path; Equipped with The heat generating portion is a first heat generating portion, and a second heat generating portion is further provided which generates heat by consuming electric power, The second heat generating portion is disposed at a position sandwiched between the lower path forming portion and the upper path forming portion. A recording device comprising:

6. 6. The recording apparatus according to claim 5, The second heating unit includes a plurality of motors. A recording device comprising:

7. 2. The recording apparatus according to claim 1, a distance between the heat generating portion and the liquid ejection head is longer than a distance between the heat generating portion and the inner path forming portion; A recording device comprising:

8. 2. The recording apparatus according to claim 1, a fan for blowing gas containing heat generated in the heat generating portion toward the inner path forming portion; A recording device comprising:

9. 2. The recording apparatus according to claim 1, a control unit for controlling the transport of the medium in the ejection path; the control unit controls the transport of the medium in the ejection path in accordance with a recording condition. A recording device comprising:

10. 10. The recording apparatus according to claim 9, A temperature and humidity detection unit is provided for detecting temperature and humidity, The recording conditions include whether or not to record on both sides of the medium, a recording duty value, and temperature and humidity. the control unit performs a drying wait control to stop the medium in the discharge path and dry the medium when the recording duty value exceeds a predetermined value and the temperature and humidity are in accordance with predetermined conditions, A recording device comprising:

11. 10. The recording apparatus according to claim 9, A temperature and humidity detection unit is provided for detecting temperature and humidity, The recording conditions include temperature and humidity, the control unit holds information relating to a first transport speed corresponding to the temperature and humidity, and information relating to a second transport speed corresponding to a recording mode, When the recording mode is a high image quality mode, the control unit compares the first transport speed with the second transport speed, When the first conveying speed exceeds the second conveying speed, the second conveying speed is adopted; When the first conveying speed is equal to or lower than the second conveying speed, the first conveying speed is adopted. A recording device comprising:

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