Liquid ejection device and blower

Abstract

This application relates to a liquid ejection device and a blower device, wherein the airflow acting on the ejected liquid is from a fan, thus potentially altering the liquid's flight path. The printer includes: a printhead for ejecting ink; a tape having a support surface; and a blower unit capable of blowing air onto a medium upstream of the printhead. The blower unit includes a first fan and a second fan that blow air onto the support surface, and a counter-part opposite a portion of the first fan and a portion of the second fan. The counter-part has an opening opening in the Z direction. When viewed from the Z direction, the opening is located between the first fan and the second fan in the X direction. When a first gap in the X direction at a first position in the +Y direction and a second gap in the X direction at a second position upstream in the +Y direction are provided, the second gap is larger than the first gap.

Description

Technical Field

[0001] This invention relates to a liquid ejection device and a blower device. Background Technology

[0002] The recording apparatus of Patent Document 1 includes: a recording head that sprays ink onto a recording medium; a drive roller configured to contact a first surface of the recording medium and apply a conveying force to the first surface; and a fan configured to blow air onto a second surface of the recording medium from a position opposite to the drive roller.

[0003] Patent Document 1: Japanese Patent Application Publication No. 2015-137164

[0004] In the configuration described in Patent Document 1, when a portion of the airflow that is emitted from the fan and diffuses in multiple directions due to collision with any surface flows toward the nozzle from which the liquid is ejected, the airflow acts on the ejected liquid, thereby creating the possibility that the flight state of the liquid may change. Summary of the Invention

[0005] The liquid ejection device according to the present invention for solving the above-mentioned technical problems is characterized by comprising: an ejection section capable of ejecting liquid to a conveyed medium; a support section having a support surface capable of supporting the medium; and a blower section capable of blowing air onto the medium upstream of the ejection section in the conveying direction of the medium, the blower section comprising: a first fan blowing air onto the support surface; a second fan arranged side by side with the first fan in a width direction intersecting the conveying direction, the second fan blowing air onto the support surface; and an opposing member facing the support surface in a height direction intersecting the conveying direction and the width direction, the opposing member facing a portion of the first fan and a portion of the second fan in the height direction, the opposing member having an opening opening in the height direction, the opening being located between the first fan and the second fan in the width direction when viewed from the height direction, and the second interval being greater than the first interval when the interval of the opening in the width direction is set as a first interval at a first position in the conveying direction and the interval of the opening in the width direction is set as a second interval at a second position upstream of the conveying direction than the first position.

[0006] The present invention relates to a blower device for solving the above-mentioned technical problems, characterized in that it comprises: a support portion having a support surface capable of supporting a medium; and a blower portion capable of blowing air onto the medium upstream of the ejector portion in the conveying direction of the medium, the ejector portion being capable of ejecting liquid onto the medium, the blower portion comprising: a first fan blowing air onto the support surface; a second fan arranged alongside the first fan in a width direction intersecting the conveying direction, the second fan blowing air onto the support surface; and an opposing member facing the support surface in a height direction intersecting the conveying direction and the width direction, the opposing member facing a portion of the first fan and a portion of the second fan in the height direction, the opposing member having an opening opening in the height direction, the opening being located between the first fan and the second fan in the width direction when viewed from the height direction, and the second interval being greater than the first interval when the interval of the opening in the width direction is set as a first interval at a first position in the conveying direction and the interval of the opening in the width direction is set as a second interval at a second position upstream of the conveying direction than the first position. Attached Figure Description

[0007] Figure 1 This is a diagram showing the overall configuration of the printer involved in the embodiment.

[0008] Figure 2 This is a perspective view showing the blower unit involved in the embodiment.

[0009] Figure 3 This is a top view showing a unit cell of the blower unit involved in the embodiment.

[0010] Figure 4 This is a perspective view of a portion of the blower unit involved in the implementation method.

[0011] Figure 5 This is a perspective view of the first airflow direction component of the blower unit involved in the embodiment.

[0012] Figure 6 This is a side view showing the blower unit and the peripheral portion of the printer according to the embodiment.

[0013] Figure 7 This is a perspective view showing the airflow generated in the blower unit according to the embodiment.

[0014] Figure 8 This is a top view showing the airflow generated in the blower unit according to the embodiment.

[0015] Figure 9This is a schematic diagram showing the airflow generated in the periphery of the first fan and the first airflow direction member of the blower unit according to the embodiment.

[0016] Figure 10 This is a schematic diagram showing the airflow generated in the periphery of the opening of the blower unit according to the embodiment.

[0017] Figure 11 This is a general diagram showing the results of simulating the airflow state when the blower unit according to this embodiment is used in a configuration with an interval of d3A.

[0018] Figure 12 This is a general diagram showing the results of simulating the airflow state when the blower unit according to this embodiment is used in a configuration with an interval of d3B.

[0019] Figure 13 This is a schematic diagram showing the state in which the medium being transported is pressed against the support surface and blown by air in the printer according to this embodiment.

[0020] Figure 14 This is a summary diagram showing the results of simulating the airflow state when using the blower unit involved in the comparative example with the configuration of interval DA.

[0021] Figure 15 This is an overview diagram showing the results of simulating the airflow state when using the blower unit involved in the comparative example with the configuration of interval DB.

[0022] Explanation of reference numerals in the attached figures

[0023] 2…Floor section, 10…Printer, 12…Main unit, 13…Main frame, 14…Side plate, 16…First support frame, 18…Second support frame, 20…Conveyor unit, 21…Drive roller, 22…Driven roller, 24…Conveying device, 25…Blower, 26…Belt, 27…Inner circumferential surface, 28…Outer circumferential surface, 28A…Support surface, 30…Recording unit, 32…Print head, 33…Space section, 34…Carriage, 38…Control unit, 40…Pressing unit, 42…Pressing roller, 44…Roller support, 46…Frame component, 47…Lower surface, 48…Sliding part, 48A…Modible part, 48B…Arm, 48C…Protective part, 50…Suction unit, 5 2…lower duct, 53…lower surface, 54…exhaust pipe, 55…space section, 60…blowing unit, 62…retaining frame, 63…upper wall, 63A…slit, 64…front wall, 65…rear wall, 66…cutout, 67…mounting frame, 67A…upper surface, 68…bracket, 68A…upper surface, 69…magnet, 70…unit unit, 72…first fan, 73…main body, 74…outlet, 76…second fan, 77…main body, 78…outlet, 82…opposing part, 84…first airflow component, 86…bottom plate, 87…opposing surface, 88…side plate, 89…connecting hole, 92…folding part, 93…end face, 94…second extension, 96… 1. Extension, 98… Second ridge section, 99… Recess, 102… First ridge section, 103… Recess, 104… Second wind direction component, 106… Base plate section, 107… Opposing surface, 108… Side plate section, 112… Folding section, 114… Second extension, 116… First extension, 118… Second ridge section, 119… Recess, 122… First ridge section, 123… Recess, 125… Gap section, 126… Hinge section, 127… Plate section, 128… Plate section, 129… Shaft section, 132… Opening section, 200… Blower unit, 204… Opposing plate, 205… End, C1… Centerline, CA… Rotation center, CB… Rotation center, d1… Interval Interval, d2…interval, d3…interval, d3A…interval, d3B…interval, DA…interval, DB…interval, E1…blowing range, E2…blowing range, G…point, K1…airflow, K2…airflow, K3…airflow, K4…airflow, K5…airflow, K6…airflow, K7…airflow, K8…airflow, K9…airflow, K10…airflow, K11…airflow, K12…airflow, KA…airflow, KB…airflow, KC…airflow, KD…airflow, KE…airflow, KF…airflow, L1…length, M…medium, P1…first position, P2…second position, Q…ink, S1…blowing area, S2…blowing area, W1…first interval, W2…second interval. Detailed Implementation

[0024] The present invention will now be briefly described.

[0025] The liquid ejection device according to the first method is characterized by comprising: an ejection section capable of ejecting liquid to a conveyed medium; a support section having a support surface capable of supporting the medium; and a blower section capable of blowing air onto the medium upstream of the ejection section in the conveying direction of the medium, the blower section comprising: a first fan blowing air onto the support surface; a second fan arranged side by side with the first fan in a width direction intersecting the conveying direction, the second fan blowing air onto the support surface; and an opposing member facing the support surface in a height direction intersecting the conveying direction and the width direction, the opposing member facing a portion of the first fan and a portion of the second fan in the height direction, the opposing member having an opening opening in the height direction, the opening being located between the first fan and the second fan in the width direction when viewed from the height direction, and the second interval being greater than the first interval when the interval of the opening in the width direction is set as a first interval at a first position in the conveying direction and the interval of the opening in the width direction is set as a second interval at a second position upstream of the conveying direction than the first position.

[0026] According to this method, in the portion of the first and second fans not opposed to the opposing component in the height direction, the airflow delivered from the first and second fans directly reaches the medium. Therefore, dust and other foreign matter adhering to the medium can be removed by the airflow.

[0027] The airflow that collides with the medium or the support surface diffuses radially from the point of collision along the medium or the support surface. Therefore, a portion of the airflow that collides with the medium or the support surface may sometimes flow toward the ejector.

[0028] Here, when viewed from the height direction, the shape of the opening of the opposing component is such that the upstream of the conveying direction is more open than the downstream in the width direction. Therefore, a portion of the airflow passing through the edge of the opening and toward the medium or the support surface has a component in a direction that intersects the conveying direction.

[0029] Furthermore, the downstream of the opening in the conveying direction is narrower in the width direction compared to the upstream of the opening in the conveying direction, making it easier for a portion of the airflow to collide with each other.

[0030] Through these functions, the airflow passing through the edge of the opening and toward the medium or the support surface can function as an air curtain, thus effectively reducing the airflow toward the ejection part after colliding with the medium or the support surface.

[0031] Furthermore, by reducing the airflow toward the ejector, changes in the flight state of the liquid ejected from the ejector toward the medium can be suppressed.

[0032] The liquid ejection device according to the second method is characterized in that, in the first method, the opening has a first ridge portion and a second ridge portion, the first ridge portion and the second ridge portion are opposite to each other in the width direction, constituting at least a part of the opening portion, and when viewed from the height direction, the first ridge portion is located within the blowing range of the first fan in the conveying direction, and when viewed from the height direction, the second ridge portion is located within the blowing range of the second fan in the conveying direction.

[0033] According to this method, compared to a configuration in which the first fan and the second fan in the conveying direction do not have the first ridge portion and the second ridge portion, a portion of the airflow from the first fan and the second fan respectively toward the width direction can be efficiently used as an air curtain.

[0034] The liquid ejection device involved in the third method is characterized in that, in the second method, the first ridge portion and the second ridge portion are respectively inclined relative to the width direction such that the second interval is greater than the first interval.

[0035] According to this method, the first ridge portion and the second ridge portion are respectively inclined relative to the width direction such that the second interval is greater than the first interval, thereby enabling the size of the opening in the width direction to continuously decrease from upstream to downstream in the conveying direction.

[0036] The liquid ejection device according to the fourth method is characterized in that, in the second or third method, the opposing member has an opposing surface opposite to the first fan and the second fan respectively, and when the direction intersecting the opposing surface and moving from the opposing member toward the first fan and the second fan is set as the first direction, the opposing member is provided with a first extension extending from the first ridge portion toward the first direction and a second extension extending from the second ridge portion toward the first direction.

[0037] According to this method, a portion of the airflow along the opposing surface collides with the first extension or the second extension and moves upward in the height direction. Additionally, the upward-moving airflow crosses the first extension or the second extension and moves downward in the height direction. Thus, by colliding with the first extension or the second extension, the directional component of the airflow coincides with the downward-moving component in the height direction. Therefore, even if the distance between the opposing member and the medium in the height direction changes, the directional component of the airflow toward the medium can remain consistent. Furthermore, by ensuring that the directional component of the airflow toward the medium is consistent, changes in the flight state of the liquid ejected from the ejector into the medium can be suppressed.

[0038] The liquid ejection device according to the fifth method is characterized in that, in any one of the first to fourth methods, the blower section has a holding section for holding both the first fan and the second fan, the blower section is provided with a connecting section, the connecting section connecting the holding section and the opposing member in such a way that the opposing member can change its position relative to the support surface according to an external force.

[0039] According to this method, the connecting portion connects the retaining portion and the opposing member in such a way that the opposing member can change its position relative to the support surface according to an external force. Here, during the operation of placing the medium on the support portion, when the medium or the like comes into contact with the opposing member, the opposing member changes its position relative to the support surface according to the applied external force. As a result, at least a portion of the opposing member can be made to avoid the support surface, that is, the distance between the opposing member and the support surface can be increased, thus improving the workability of placing the medium on the support portion.

[0040] The liquid ejection device according to the sixth method is characterized in that, in any one of the first to fifth methods, the liquid ejection device has a frame component, the frame component is made of a strongly magnetic material and supports the ejection part, and the blower part has a mounting part including a permanent magnet and can be disassembled and assembled relative to the frame component by means of the magnetic force of the permanent magnet.

[0041] According to this method, the blower unit is removed from the frame member by applying an external force greater than the magnetic force of the permanent magnet to the mounting part. Furthermore, the blower unit is mounted to the frame member using the magnetic force of the permanent magnet. This allows for the installation of the blower unit with a simple configuration.

[0042] The liquid ejection device according to the seventh method is characterized in that, in any one of the first to sixth methods, the support portion includes: a plurality of rotatable rollers; and a conveyor belt having the support surface and wound around the plurality of rollers, wherein a pressing roller for pressing the medium against the support surface is positioned upstream of the ejection portion in the conveying direction, the pressing roller being capable of reciprocating in the conveying direction and in the opposite direction to the conveying direction, and the blower portion is positioned downstream of the pressing roller and upstream of the ejection portion in the conveying direction.

[0043] It is clear that when foreign matter such as dust adheres to the surface of the medium, it is easily separated from the surface after passing through the reciprocating pressing roller.

[0044] Here, according to this method, the medium in which foreign matter is easily separated from the surface is blown by the blower section, thus further improving the ability to remove foreign matter.

[0045] The blower device according to the eighth method is characterized by comprising: a support portion having a support surface capable of supporting a medium; and a blower portion capable of blowing air onto the medium upstream of a jet portion capable of spraying liquid onto the medium in the transport direction of the medium, the blower portion comprising: a first fan blowing air onto the support surface; a second fan arranged alongside the first fan in a width direction intersecting the transport direction, the second fan blowing air onto the support surface; and an opposing member facing the support surface in a height direction intersecting the transport direction and the width direction, the opposing member facing a portion of the first fan and a portion of the second fan in the height direction, the opposing member having an opening opening in the height direction, the opening being located between the first fan and the second fan in the width direction when viewed from the height direction, and the second interval being greater than the first interval when the interval of the opening in the width direction is set as a first interval at a first position in the transport direction and the interval of the opening in the width direction is set as a second interval at a second position upstream in the transport direction than the first position.

[0046] According to this method, in the portion of the first and second fans not opposed to the opposing component in the height direction, the airflow delivered from the first and second fans directly reaches the medium. Therefore, dust and other foreign matter adhering to the medium can be removed by the airflow.

[0047] The airflow that collides with the medium or the support surface diffuses radially from the point of collision along the medium or the support surface. Therefore, a portion of the airflow that collides with the medium or the support surface may sometimes flow toward the ejector.

[0048] Here, when viewed from the height direction, the shape of the opening of the opposing component is such that the upstream of the conveying direction is more open than the downstream in the width direction. Therefore, a portion of the airflow passing through the edge of the opening and toward the medium or the support surface has a component in a direction that intersects the conveying direction.

[0049] Furthermore, the downstream of the opening in the conveying direction is narrower in the width direction compared to the upstream of the opening in the conveying direction, making it easier for a portion of the airflow to collide with each other.

[0050] Through these functions, the airflow passing through the edge of the opening and toward the medium or the support surface can function as an air curtain, thus effectively reducing the airflow toward the ejection part after colliding with the medium or the support surface.

[0051] The blower device according to the ninth method is characterized in that, in the eighth method, the opening has a first ridge portion and a second ridge portion, the first ridge portion and the second ridge portion are opposite to each other in the width direction, constituting at least a part of the opening portion, and when viewed from the height direction, the first ridge portion is located within the blowing range of the first fan in the conveying direction, and when viewed from the height direction, the second ridge portion is located within the blowing range of the second fan in the conveying direction.

[0052] According to this method, compared to a configuration in which the first fan and the second fan in the conveying direction do not have the first ridge portion and the second ridge portion, a portion of the airflow from the first fan and the second fan respectively toward the width direction can be efficiently used as an air curtain.

[0053] The blower device according to the tenth method is characterized in that, in the ninth method, the first ridge portion and the second ridge portion are respectively inclined relative to the width direction such that the second interval is greater than the first interval.

[0054] According to this method, the first ridge portion and the second ridge portion are respectively inclined relative to the width direction such that the second interval is greater than the first interval, thereby enabling the size of the opening in the width direction to continuously decrease from upstream to downstream in the conveying direction.

[0055] Hereinafter, as an embodiment, an example of a liquid ejection device, namely a printer 10, will be specifically described.

[0056] Figure 1 The overall configuration of a printer 10 installed on a floor section 2, which is an example of the installation location, is shown. The printer 10 records on a medium M. Examples of medium M include cloth and paper. In this embodiment, cloth is used as an example of medium M. It should be noted that the XYZ coordinate system shown in each figure is an orthogonal coordinate system.

[0057] An exhaust device (not shown) is installed on the floor section 2. The exhaust device is connected to the exhaust pipe 54 (described later) for intake.

[0058] The X direction is an example of the device depth direction of the printer 10. The base of the arrow representing the X direction is designated as the -X direction, and the tip of the arrow representing the X direction is designated as the +X direction. Furthermore, the X direction is an example of the width direction.

[0059] The Y direction is an example of the width direction of the printer 10. The leading edge of the arrow representing the Y direction is designated as the +Y direction, and the base edge is designated as the -Y direction. Furthermore, the +Y direction is an example of the transport direction of the medium M.

[0060] The Z-direction is an example of the height direction of the printer 10, and it is orthogonal to both the X and Y directions. The leading edge of the arrow representing the Z-direction is designated as the +Z direction, and the base edge is designated as the -Z direction. In the following description, the +Z direction will sometimes be referred to as "up" and the -Z direction as "down."

[0061] As an example, printer 10 is configured to include a main body unit 12, a transport unit 20, a recording unit 30, a cleaning unit (not shown), a control unit 38, a pressing unit 40, a frame component 46, an air suction unit 50, and a blower unit 60. Furthermore, as an example, printer 10 performs inkjet recording.

[0062] The main body unit 12 is configured as a base for mounting various parts of the printer 10. The main body unit 12 is configured to include a main frame 13 forming part of the skeleton of the main body unit 12, a side plate 14 mounted on the main frame 13, a first support frame 16 located in the -Y direction relative to the main frame 13, and a second support frame 18 located in the +Y direction relative to the main frame 13.

[0063] The first support frame 16 contacts the inner circumferential surface 27 of the tape 26 (described later). The first support frame 16 bears the load from the pressing roller 42 (described later), thereby supporting the tape 26 and the medium M.

[0064] The second support frame 18 contacts the inner circumferential surface 27. The second support frame 18 is located below the nozzle 32 (described later) and supports the tape 26 and the medium M.

[0065] The conveying unit 20 includes a drive roller 21, a driven roller 22, and a conveyor belt 26. The conveyor belt 26 is an example of a support portion for the medium M.

[0066] In the +Y direction, the drive roller 21 is positioned downstream of the driven roller 22. Furthermore, both the drive roller 21 and the driven roller 22 have a rotation axis in the X direction. The rotation of the drive roller 21 is controlled by the control unit 38, described later. The drive roller 21 and the driven roller 22 are an example of multiple rollers capable of rotation.

[0067] The conveyor belt 26 is an example of a conveyor belt having a support surface 28A (described later) and wound around the drive roller 21 and the driven roller 22. The conveyor belt 26 is configured as an annular belt obtained by joining the two ends of an elastic flat plate. The conveyor belt 26 can convey the medium M in the +Y direction by moving in a loop. In this way, the conveying unit 20 can convey the medium M in the +Y direction as the conveyor belt 26 moves in a loop due to the rotation of the drive roller 21.

[0068] As an example, the outer peripheral surface 28 of the tape 26 is adhesive, capable of supporting and adsorbing the medium M. Adhesiveness refers to the property of being able to temporarily bond to other components and being able to peel off from the bonded state.

[0069] In the outer peripheral surface 28, the flat portion located between the drive roller 21 and the driven roller 22 in the +Z direction is the support surface 28A. In other words, the tape 26 has a support surface 28A capable of supporting the medium M. A portion of the support surface 28A is opposite the recording unit 30, which will be described later, in the Z direction.

[0070] The cleaning unit (not shown) is located further downstream than the drive roller 21 in the direction in which the tape 26 moves in circles, and cleans the outer peripheral surface 28.

[0071] The recording unit 30 is configured to record on a medium M conveyed in the +Y direction. Specifically, the recording unit 30 includes a nozzle 32, which is an example of an ejector section, and a carriage 34 that supports the nozzle 32 in a manner that allows it to reciprocate in the X direction. Furthermore, the recording unit 30 is positioned above the tape 26.

[0072] The printhead 32 has a plurality of nozzles (not shown) positioned above the support surface 28A. The printhead 32 is configured to eject ink Q, an example of a liquid, from the plurality of nozzles onto the recording surface of the medium M, enabling recording of the medium M. Air can circulate through the space 33 between the printhead 32 and the support surface 28A or the medium M.

[0073] The control unit 38 is configured to include a CPU (Central Processing Unit), ROM (Read Only Memory), RAM (Random Access Memory), and a storage device (not shown), and controls the operation of various parts of the printer 10.

[0074] As an example, the pressing unit 40 has a pressing roller 42 and a roller support 44.

[0075] As an example, the pressing roller 42 is a roller with an elastic portion including silicone rubber formed on the outer peripheral surface of the core constituting the shaft portion. The shaft portion (not shown) of the pressing roller 42 extends in the X direction. The pressing roller 42 is positioned upstream of the nozzle 32 in the +Y direction, which is the conveying direction of the medium M, and is an example of a pressing member that presses the medium M from a position in the +Z direction toward a position in the -Z direction relative to the support surface 28A.

[0076] The roller support 44 is configured to include a bearing (not shown) to support the press roller 42 so that it can rotate. Furthermore, the roller support 44 also functions as a linear slider, allowing the shaft of the press roller 42 to reciprocate in the +Y and -Y directions while maintaining contact between the press roller 42 and the medium M. In other words, the press roller 42 can reciprocate in the +Y direction, which is an example of a conveying direction, and in the -Y direction, which is an example of the opposite conveying direction.

[0077] Furthermore, the roller support 44 is actuated by a cam (not shown), which causes the pressing roller 42 to move away from the support surface 28A and the medium M.

[0078] The frame component 46 is positioned upstream of the nozzle 32 and downstream of the press roller 42 in the +Y direction. The frame component 46 is made of a metal including iron, which is an example of a strongly magnetic material. In this embodiment, a strongly magnetic material means a material with a relative magnetic permeability of 10 or higher.

[0079] The frame component 46 is configured as a square cylindrical component extending in the X direction. A sliding part 48, described later, is provided on the frame component 46. The frame component 46 supports the carriage 34 and the nozzle 32 via the sliding part 48.

[0080] The exhaust pipe 54, described later, is located inside the frame component 46.

[0081] The lower surface 47 of the frame component 46 is a plane along the XY plane. The lower surface 47 is an example of a frame surface opposite the support surface 28A or the medium M in the Z direction. The distance between the lower surface 47 and the support surface 28A in the Z direction is defined as distance d1 (mm). Figure 6 ).

[0082] As an example, the sliding part 48 has: a movable part 48A, which is mounted on the frame member 46 and can move back and forth in the X direction; an arm part 48B, which is mounted on the +Y end of the movable part 48A and supports the recording unit 30; and a protective part 48C, which is mounted on the -Y end of the movable part 48A and protects wiring and pipes (not shown).

[0083] As an example, the intake unit 50 is configured to include a lower duct 52, an exhaust duct 54, and an intake fan (not shown). The intake unit 50 is disposed between the lower surface 47 and the support surface 28A. The intake unit 50 is an example of a spacing-changing portion that reduces the distance in the Z direction between the lower surface 47 and the support surface 28A. A space 55 is formed between the intake unit 50 and the support surface 28A.

[0084] like Figure 6 As shown, as an example, the lower pipe 52 has a length in the X direction approximately equal to the length of the tape 26. The +Y end of the lower pipe 52 faces the nozzle 32. Figure 1 The lower surface 53 of the lower pipe 52 is a plane along the XY plane. The lower surface 53 is opposite the support surface 28A or the medium M in the Z direction. The distance between the lower surface 53 and the support surface 28A in the Z direction is defined as distance d2 (mm). The size of distance d2 is smaller than the size of distance d1.

[0085] The exhaust duct 54 is connected to the lower duct 52 via the frame member 46. An intake fan (not shown) is mounted at one end of the exhaust duct 54.

[0086] like Figure 1 As shown, the suction unit 50 draws air into the lower duct 52 by rotating a suction fan (not shown). Mist, dust, and other particles remaining between the nozzle 32 and the medium M or support surface 28A are drawn in by the suction unit 50. The suction direction in the suction unit 50 is as shown by arrow N. Figure 13 As shown in the figure.

[0087] The blower unit 60 is an example of a blower section capable of blowing air onto the medium M which is located upstream of the nozzle 32 in the +Y direction. The blower unit 60 is positioned downstream of the press roller 42 and upstream of the nozzle 32 in the +Y direction. Furthermore, the blower unit 60 is positioned upstream of the frame member 46 in the +Y direction.

[0088] It should be noted that, in this embodiment, as an example, the blower device 25 is constituted by the tape 26 and the blower unit 60. Furthermore, the conveyor device 24 is constituted by the tape 26, the pressing roller 42, the frame member 46, and the blower unit 60.

[0089] like Figure 2 As shown, as an example, the blower unit 60 has a retaining frame 62, a mounting frame 67, a bracket 68, a magnet 69, and five sets of unit units 70 arranged in the X direction.

[0090] The retaining frame 62 holds the first fan 72 and the second fan 76, which will be described later. Figure 3 This is an example of the retaining part of both. The retaining frame 62 is a long component in the X direction. The length of the retaining frame 62 in the X direction is longer than that of the tape 26. Figure 1 The length in the X direction is longer. A virtual line extending in the Y direction and maintaining the center of frame 62 in the X direction is designated as centerline C1.

[0091] As an example, the various parts of the blower unit 60 are configured to be approximately linearly symmetrical in the X direction with respect to the center line C1.

[0092] like Figure 6 As shown, when viewed from the X direction, the retaining frame 62 has an upper wall 63, a front wall 64, and a rear wall 65, and has a U-shaped cross-sectional shape with an opening in the -Y direction and the -Z direction.

[0093] In the following description, the first fan 72 and the second fan 76 will be referred to as the first fan 72 and the second fan 76 (hereinafter referred to as the first fan 72). Figure 3 Let the direction of each rotation center axis be defined as direction A. Let the base of the arrow representing direction A be defined as direction -A, and the tip of the arrow representing direction A be defined as direction +A.

[0094] Furthermore, the direction orthogonal to the A direction when viewed from the X direction is designated as the B direction. The base of the arrow representing the B direction is designated as the -B direction, and the tip of the arrow representing the B direction is designated as the +B direction.

[0095] The upper wall 63 extends in a direction intersecting the +Y direction, with its upstream end in the +Y direction positioned further in the +Z direction than its downstream end. Multiple slits 63A are spaced apart on the upper wall 63 in the X direction. Figure 2 At the upper wall 63, the first fan 72 and the second fan 76 (described later) Figure 3 It is mounted on the upper wall 63 using screws not shown and is held in place on the upper wall 63.

[0096] The front wall 64 extends from the upstream end of the upper wall 63 in the +Y direction towards the A direction.

[0097] The rear wall 65 extends from the downstream end of the upper wall 63 in the +Y direction toward the A direction. As an example, the length of the rear wall 65 in the A direction is longer than the length of the front wall 64 in the A direction. A cutout 66 opening toward the A direction is provided on the rear wall 65.

[0098] The cutout 66 mates with the first wind direction component 84 and the second wind direction component 104, which will be described later. Figure 3 It is set according to the position of ).

[0099] like Figure 2 As shown, the mounting frame 67 extends from both ends of the retaining frame 62 in the X direction toward the +Y direction. The mounting frame 67 has an upper surface 67A along the XY plane.

[0100] The bracket 68 is located at the center of the retaining frame 62 in the X direction. The bracket 68 has an upper surface 68A along the XY plane.

[0101] Magnet 69 is an example of a mounting section including permanent magnets, with five magnets 69 disposed on the mounting frame 67. As an example, the magnet 69 has a predetermined thickness in the Z direction and a circular plate shape. As an example, two magnets 69 are disposed on each upper surface 67A, and one magnet 69 is disposed on the upper surface 68A. The lower surface of the magnet 69 in the Z direction is fixed to the mounting frame 67.

[0102] The upper surface of magnet 69 in the Z direction is mounted to the lower surface 47 of frame component 46 by magnetic force. Figure 6 The magnet 69 is removed from the frame component 46 when an external force greater than the magnetic force is applied. In this way, the blower unit 60 can be assembled and disassembled relative to the frame component 46 by the magnetic force of the permanent magnet.

[0103] like Figure 3 As shown, as an example, unit 70 includes a first fan 72, a second fan 76, an opposing part 82, and two hinge parts 126. Figure 4 ).

[0104] The first fan 72 is powered by a power source (not shown) and rotates. This is achieved via control unit 38. Figure 1 The rotation of the first fan 72 is controlled by ) . The first fan 72 moves towards the support surface 28A ( Figure 1 Blowing air.

[0105] Specifically, the first fan 72 is configured to include a main body 73 and blades (not shown). An outlet 74 is formed on the main body 73, which is composed of annular holes divided into eight equal parts in the rotational direction of the blades and extends through the main body 73 in the A direction. A circular area formed by connecting the outer periphery of the outlet 74 is designated as a virtual blowing area S1. Inside the blowing area S1, when the first fan 72 operates, an airflow K1 is generated. Figure 7 ).

[0106] The second fan 76 is powered by a power source (not shown) and rotates. This is achieved via control unit 38. Figure 1 The rotation of the second fan 76 is controlled by the first fan 72. The second fan 76 is parallel to the first fan 72 in the X direction, which intersects the +Y direction, and blows air onto the support surface 28A.

[0107] Specifically, the second fan 76 is configured to include a main body 77 and blades (not shown). An outlet 78 is formed on the main body 77, which is composed of annular holes divided into eight equal parts in the rotational direction of the blades and extends through the main body 77 in the A direction. The circular area formed by the arc connecting the outer periphery of the outlet 78 is designated as a virtual blower region S2. Inside the blower region S2, when the second fan 76 operates, an airflow K8 is generated. Figure 7 ).

[0108] In this embodiment, as an example, the first fan 72 and the second fan 76 are constructed from the same components. That is, the first fan 72 and the second fan 76 are made of the same material, have the same size and mass, and have the same blowing capacity.

[0109] Furthermore, the first fan 72 and the second fan 76 are positioned in a position where they overlap when they move parallel to each other in the X direction. Let the length L1 be the distance in the X direction between the rotation center CA of the first fan 72 and the rotation center CB of the second fan 76.

[0110] The opposing part 82 is perpendicular to the support surface 28A in the Z direction, which intersects the +Y and X directions. Figure 1 Opposing portion 82 is an example of an opposing member that is opposed to a portion of the first fan 72 and a portion of the second fan 76 in the Z direction. As an example, a portion of the first fan 72 is located further in the +Y direction than the rotation center CA of the first fan 72. As an example, a portion of the second fan 76 is located further in the +Y direction than the rotation center CB of the second fan 76.

[0111] As an example, the opposing portion 82 has a first airflow component 84, a second airflow component 104, and an opening 132. In addition, the opposing portion 82 has opposing surfaces 87 and 107, described later, which are opposite to the first fan 72 and the second fan 76, respectively.

[0112] The direction intersecting the opposing surfaces 87 and 107 and extending from the opposing portion 82 toward the first fan 72 and the second fan 76 is defined as direction D, which is an example of the first direction. Figure 5 Set the base of the arrow representing the D direction to the -D direction, and set the tip of the arrow representing the D direction to the +D direction.

[0113] Furthermore, the direction orthogonal to both the X and D directions when viewed from the D direction is defined as the C direction. Figure 5 The C direction is the direction extending towards the position in the +Y and +Z directions. The base of the arrow representing the C direction is designated as the -C direction, and the tip of the arrow representing the C direction is designated as the +C direction.

[0114] The distance between the lowest part of the opposing part 82, i.e., the end of the opposing part 82 in the -C direction, and the distance between the supporting surface 28A in the Z direction is set as distance d3 (mm). Figure 6 ).

[0115] like Figure 5 As shown, as an example, the first wind direction component 84 has a base plate portion 86, a side plate portion 88, and a folding portion 92. Furthermore, the first wind direction component 84 is provided with a first extension portion 96 and a second extension portion 94. Moreover, the first wind direction component 84 has a first ridge portion 102 and a second ridge portion 98. It should be noted that, in this embodiment, as an example, the first wind direction component 84 and the second wind direction component 104 (… Figure 3 They have the same composition.

[0116] The base plate portion 86 is formed as a plate having a predetermined thickness in the D direction and extends in the X direction. The base plate portion 86 has an opposing surface 87. The opposing surface 87 is the end face of the base plate portion 86 in the +D direction, and is opposite to the first fan 72 ( Figure 3 Opposite. Used for connecting the hinge part 126 described later. Figure 4 The connecting hole 89 is provided on the bottom plate 86.

[0117] The side plate portion 88 rises from the end of the base plate portion 86 in the +C direction towards the +D direction.

[0118] A folded portion 92 is formed at the center of the end portion of the base plate portion 86 in the -C direction. The folded portion 92 is a portion that is thicker than the base plate portion 86 in the D direction by folding towards the connecting hole 89. The end face 93 along the X direction is located at the end of the folded portion 92 in the -C direction.

[0119] The second ridge portion 98 is located in the -X direction relative to the folded portion 92 at its end in the -C direction of the base plate portion 86. The second ridge portion 98 is adjacent to the folded portion 92. The second ridge portion 98 extends in an inclined direction intersecting the X direction with its +X direction end located in the -C direction relative to its -X direction end. The +X direction end of the second ridge portion 98 is located further in the -C direction than the folded portion 92.

[0120] At the end of the base plate portion 86 in the -C direction, a recessed portion 99 is formed in the -X direction relative to the second ridge portion 98. The recessed portion 99 is a portion that is recessed in the +C direction relative to the second ridge portion 98.

[0121] The second extension 94 is a plate-shaped portion that extends from the second ridge portion 98 in the +D direction. The height of the second extension 94 in the +D direction is set such that airflow along the opposing surface 87 toward the -C direction can pass over the second extension 94 and flow toward the -C direction.

[0122] The first ridge portion 102 is located in the +X direction relative to the folded portion 92 at its end in the -C direction of the base plate portion 86. The first ridge portion 102 is adjacent to the folded portion 92. The first ridge portion 102 extends in an inclined direction intersecting the X direction with its end in the +X direction located in the +C direction relative to its end in the -X direction. The end of the first ridge portion 102 in the -X direction is located further in the -C direction than the folded portion 92.

[0123] At the end of the base plate portion 86 in the -C direction, a recessed portion 103 is formed in the +X direction relative to the first ridge portion 102. The recessed portion 103 is a portion that is recessed in the +C direction relative to the first ridge portion 102.

[0124] The first extension 96 is a plate-shaped portion extending from the first ridge portion 102 in the +D direction. The height of the first extension 96 in the +D direction is set such that airflow along the opposing surface 87 towards the -C direction can pass over the first extension 96 and flow in the -C direction. Furthermore, as an example, the height of the first extension 96 in the +D direction is the same as the height of the second extension 94 in the +D direction.

[0125] like Figure 3 As shown, as an example, the second wind direction component 104 has a base plate portion 106, a side plate portion 108, and a folding portion 112. Furthermore, the second wind direction component 104 is provided with a second extension portion 114 and a first extension portion 116. Moreover, the second wind direction component 104 has a second ridge portion 118 and a first ridge portion 122. It should be noted that in Figure 3 In the text, the arrows pointing in the C and D directions are omitted.

[0126] The base plate 106 is formed as a plate with a predetermined thickness in the D direction and extends in the X direction. The base plate 106 has an opposing surface 107. The opposing surface 107 is the end face of the base plate 106 in the +D direction, and is opposite to the second fan 76. A hinge portion 126 (described later) is provided for connection. Figure 4 (Not shown) Connecting holes are provided on the base plate 106.

[0127] The side plate portion 108 rises from the end of the base plate portion 106 in the +C direction toward the +D direction.

[0128] The folded portion 112 is formed at the center of the end portion in the -C direction of the base plate portion 106 in the X direction. The folded portion 112 is a portion that is thicker than the base plate portion 106 in the D direction by folding towards the connecting hole.

[0129] The second ridge portion 118 is located in the -X direction relative to the folded portion 112 at its end in the -C direction of the base plate portion 106. The second ridge portion 118 is adjacent to the folded portion 112. The second ridge portion 118 extends in an inclined direction intersecting the X direction with its end in the +X direction located in the -C direction relative to its end in the -X direction. The end of the second ridge portion 118 in the +X direction is located further in the -C direction than the folded portion 112.

[0130] At the end of the base plate portion 106 in the -C direction, a recess 119 is formed in the -X direction relative to the second ridge portion 118. The recess 119 is a portion that is recessed in the +C direction relative to the second ridge portion 118.

[0131] The second extension 114 is a plate-shaped portion that extends from the second ridge portion 118 in the +D direction. The height of the second extension 114 in the +D direction is set such that airflow along the opposing surface 107 toward the -C direction can pass over the second extension 114 and flow toward the -C direction.

[0132] The first ridge portion 122 is located in the +X direction relative to the folded portion 112 at its end in the -C direction of the base plate portion 106. The first ridge portion 122 is adjacent to the folded portion 112. The first ridge portion 122 extends in an inclined direction intersecting the X direction with its end in the +X direction located in the +C direction relative to its end in the -X direction. The end of the first ridge portion 122 in the -X direction is located further in the -C direction than the folded portion 112.

[0133] At the end of the base plate portion 106 in the -C direction, a recess 123 is formed in the +X direction relative to the first ridge portion 122. The recess 123 is a portion that is recessed in the +C direction relative to the first ridge portion 122.

[0134] The first extension 116 is a plate-shaped portion extending from the first ridge portion 122 in the +D direction. The height of the first extension 116 in the +D direction is set such that airflow along the opposing surface 107 towards the -C direction can pass over the first extension 116 and flow in the -C direction. Furthermore, as an example, the height of the first extension 116 in the +D direction is the same as the height of the second extension 114 in the +D direction.

[0135] The base plate portion 86 and the base plate portion 106 are located at a distance from each other in the X direction. That is, a gap portion 125 is formed between the first airflow component 84 and the second airflow component 104. The gap portion 125 is a space extending in the Y direction, which allows air to pass through, which is an example of a gas.

[0136] The positions of the first wind direction component 84 and the second wind direction component 104 in the Y direction are aligned.

[0137] The opening 132 is a space formed by the first airflow component 84 and the second airflow component 104, and it opens in the Z direction. When viewed from the Z direction, the opening 132 is located between the first fan 72 and the second fan 76 in the X direction, and has a shape in which the upstream portion in the +Y direction is more open in the X direction than the downstream portion. That is, as an example, when viewed from the Z direction, the opening 132 is configured as a trapezoid with the upper base in the +Y direction and the lower base in the -Y direction. Thus, the portion corresponding to the upper base and the portion corresponding to the lower base are open in the Y direction.

[0138] Specifically, the opening 132 has a first ridge portion 102 and a second ridge portion 118 that are opposite to each other in the X direction. The first ridge portion 102 of the first wind direction member 84 and the second ridge portion 118 of the second wind direction member 104 form the hypotenuse of the trapezoid described above. In other words, the first ridge portion 102 and the second ridge portion 118 constitute at least a portion of the opening 132.

[0139] When viewed from the Z direction, the first ridge portion 102 is located within the blowing range E1 of the first fan 72 in the +Y direction. The blowing range E1 is the range in the Y direction that includes the position from the -Y direction end of the blowing region S1 to the +Y direction end. Being located within the blowing range E1 means that when viewed from the X direction, the blowing range E1 overlaps with the first ridge portion 102.

[0140] When viewed from the Z direction, the second ridge portion 118 is located within the blowing range E2 of the second fan 76 in the +Y direction. The blowing range E2 is the range in the Y direction encompassing the position from the -Y direction end of the blowing region S2 to the +Y direction end. Being located within the blowing range E2 means that when viewed from the X direction, the blowing range E2 overlaps with the second ridge portion 118.

[0141] The position of the end of the second ridge portion 118 in the +Y direction and the position of the end of the first ridge portion 102 in the +Y direction are set as the first position P1. At the first position P1 in the +Y direction, the distance between the second ridge portion 118 and the first ridge portion 102 in the X direction is set as the first distance W1 (mm).

[0142] The position P2 is defined as the position of the end of the second ridge portion 118 in the -Y direction and the position of the end of the first ridge portion 102 in the -Y direction. That is, the second position P2 is located upstream in the +Y direction, which is higher than the first position P1. At the second position P2, the distance between the second ridge portion 118 and the first ridge portion 102 in the X direction is defined as the second distance W2 (mm).

[0143] The second ridge portion 118 and the first ridge portion 102 are inclined relative to the X direction with the second interval W2 being greater than the first interval W1.

[0144] In other words, at the first position P1 in the +Y direction, the spacing of the openings 132 in the X direction is set as the first spacing W1, and at the second position P2, which is upstream in the +Y direction, the spacing of the openings 132 in the X direction is set as the second spacing W2, the second spacing W2 is greater than the first spacing W1.

[0145] like Figure 4 As shown, a hinge portion 126 is provided on the blower unit 60. The hinge portion 126 is designed to allow the opposing portion 82 to change relative to the support surface 28A according to external force. Figure 1 This is an example of a connection between the retaining frame 62 and the opposing part 82, arranged in a specific manner.

[0146] like Figure 9 As shown, when viewed from the X direction, the hinge portion 126 has: a shaft portion 129 having a central axis along the X direction; a plate portion 127 extending from the shaft portion 129 along the opposing surface 87; and a plate portion 128 extending from the shaft portion 129 along the rear wall 65. The plate portion 127 is connected to the first wind direction member 84. The plate portion 128 is connected to the rear wall 65.

[0147] The hinge portion 126 rotates relative to the plate portion 127 and the plate portion 128 about the shaft portion 129, thereby adjusting the angle between the first wind direction component 84 and the rear wall 65.

[0148] In this embodiment, as an example, the first wind direction member 84 is tilted relative to the Y direction by the side plate portion 88 passing through the cut portion 66 and being located in the +Y direction relative to the rear wall 65 and in contact with the rear wall 65.

[0149] It should be noted that regarding the second wind direction component 104 ( Figure 4 The hinge part 126 of the ) has the same structure, so the description is omitted.

[0150] <Comparative Example>

[0151] The following describes a comparative example of the blower unit 200 of the blower unit 60 of this embodiment.

[0152] exist Figure 14 In the diagram, arrows indicate the direction of the airflow K as a simulation result during blowing in the comparative example blower unit 200. It should be noted that the arrows are only roughly summarized together, and the length of the arrows does not represent the velocity or pressure of the airflow K.

[0153] The comparative example blower unit 200 has a retaining frame 62, a first fan 72, and an opposing plate 204.

[0154] When viewed from the X direction, the opposing plate 204 and the first wind direction component 84 ( Figure 3 It is tilted at the same angle and opposed to a portion of the first fan 72 in the Z direction. The end 205 of the opposing plate 204 in the -Y direction is not bent. It should be noted that in Figure 14 In the middle, the distance between the end 205 and the support surface 28A in the Z direction is the distance DA (mm).

[0155] In the comparative example blower unit 200, with interval DA, the airflow K is generally oriented in the -Y direction at a position relative to the end 205 in the -Y direction.

[0156] On the other hand, at a position relative to the end 205 in the +Y direction and below the opposing plate 204, directional turbulence can be seen in a portion of the airflow K.

[0157] exist Figure 15 In the comparative example, the arrows indicate that the blower unit 200 moves in the +Z direction, causing the distance DB (mm) between the end 205 and the support surface 28A in the Z direction to be greater than the distance DA (mm). Figure 14 The direction of the airflow K at that time.

[0158] When the interval is DB, the direction of the airflow K at the periphery of the end 205 is different from that when the interval is DA. In addition, the state of the airflow K flowing in the +Y direction at a position lower than the opposing plate 204 is different from that when the interval is DA.

[0159] Thus, it can be understood that when using the comparative example blower unit 200, since the distance between the opposing plate 204 and the support surface 28A changes from the distance DA to the distance DB, the airflow towards the nozzle 32 ( Figure 1 The direction and flow rate of the airflow K are more likely to change.

[0160] <The function of this implementation method>

[0161] The functions of the printer 10, conveying unit 20, and blower unit 60 in this embodiment will now be explained. For details regarding the components of the printer 10, please refer to... Figures 1 to 6 Sometimes, the recording of individual drawing numbers may be omitted.

[0162] It should be noted that, as already explained, the airflow generated from the first fan 72 toward the first airflow direction component 84 is designated as airflow K1, and the airflow generated from the second fan 76 toward the second airflow direction component 104 is designated as airflow K8.

[0163] like Figure 7 As shown, by generating airflow K1, airflow K2 with a component moving from the first airflow direction member 84 toward the -Y direction and airflow K3 with a component moving toward the +X direction are generated. In the space where airflow K1 and airflow K2 merge, airflow K4 with a component moving toward the -Y direction and airflow K5 with a component moving toward the +X direction are generated.

[0164] On the other hand, by generating airflow K8, airflow K9 with a component moving from the second airflow direction member 104 toward the -Y direction and airflow K10 with a component moving toward the -X direction are generated. In the space where airflow K8 and airflow K9 merge, airflow K11 with a component moving toward the -Y direction and airflow K12 with a component moving toward the -X direction are generated.

[0165] It should be noted that the diagrams and descriptions of the airflow located in the -X direction relative to airflow K1 and the airflow located in the +X direction relative to airflow K8 are omitted.

[0166] exist Figure 8 In the diagram, the position in the X direction, indicated by lines 9-9 and 10-10, represents the position where the assumed airflow K is likely to flow towards the nozzle 32. Figure 1 The position of ).

[0167] At the position indicated by line 10-10, airflow K3 collides with airflow K10, generating airflow KA with a -Y component. Furthermore, airflow K5 collides with airflow K12, generating airflow KE with a +Y component and airflow KD with a -Y component. Also, a portion of airflow K3 crosses the first extension 96 to become airflow KB towards the opening 132. A portion of airflow K10 crosses the second extension 114 to become airflow KC towards the opening 132.

[0168] Here, airflow KF is generated by combining airflow KA, airflow KB, airflow KC, and airflow KD.

[0169] On the other hand, airflow KE is reduced by having at least one of a portion of airflow KA, airflow KB, and airflow KC collide with airflow KE.

[0170] like Figure 8 9-9 line and Figure 9 As shown, in the portion where the first fan 72 is located in the X direction, the airflow K4 towards the support surface 28A is the main component. Therefore, the magnitude of the airflow K6, which has a component in the -Y direction, is greater than the magnitude of the airflow K7, which has a component in the +Y direction. In other words, it is possible to reduce the airflow towards the nozzle 32 ( Figure 1 (K7) airflow.

[0171] like Figure 8 10-10 line and Figure 10 As shown, at the opening 132, a flow of air KE with a +Y component is intended to flow; however, a portion of the airflow KA flows into this airflow KE. In other words, the airflow KE functions as an air curtain. Thus, the airflow KE is reduced by colliding with the airflow KA.

[0172] It should be noted that, although the illustrations are omitted, as a comparative example of this embodiment, when the second extension 114 and the first extension 96 are both straight wall sections extending along the X direction, the confluence point of the airflow KA is... Figure 10 The location of point G shown is deviated from the -Y direction, therefore, it is difficult to reduce the airflow KE.

[0173] exist Figure 11 In the image, arrows indicate the spacing d3 in the blower unit 60. Figure 6 The direction of the airflow K is the result of the simulation when the interval is set to d3A (mm) and the blower is blown.

[0174] exist Figure 12 In the diagram, arrows indicate the direction of the airflow K as a result of a simulation in blower unit 60 where the interval d3 is set to interval d3B (mm) and blowering is performed. Interval d3B > Interval d3A. It should be noted that the arrows are only roughly summarized together, and the length of the arrows does not represent the velocity or pressure of the airflow K.

[0175] like Figure 11 and Figure 12As shown, in the first airflow direction member 84, where the second extension 94 is provided, the airflow K rises in the +Z direction along the second extension 94. Furthermore, after rising, the airflow K descends in the -Z direction after passing the second extension 94. Thus, due to the provision of the second extension 94, the periphery of the second extension 94 exhibits a state of rising and then descending airflow K. Therefore, compared to a configuration where the first airflow direction member 84 does not have the second extension 94, the flow state of the airflow K at the periphery of the second extension 94 is stable. Consequently, even if the distance between the first airflow direction member 84 and the support surface 28A or the medium M changes, the flow towards the nozzle 32 ( Figure 1 The possibility of changes in the direction and flow rate of the airflow K.

[0176] It should be noted that the same airflow K state can be obtained for the second wind direction component 104, therefore, its illustration and description are omitted.

[0177] like Figure 13 As shown, the case where the medium M is placed on the support surface 28A and is being conveyed will be explained. When the pressing roller 42 rotates and moves back and forth, the medium M is subjected to pressing force from the pressing roller 42 and frictional force generated between it and the outer peripheral surface of the pressing roller 42, thereby making it easy to peel off the thin sheet MA, which is part of the component.

[0178] The flake MA is an example of a foreign object. In this embodiment, the medium M is fabric, therefore, the flake MA means fluff. In particular, the flake MA that was attached to the medium M before the pressing roller 42 pressed it off from the medium M due to the pressing roller 42, and is then conveyed in a state of being attached to the medium M due to the action of electrostatic force, etc.

[0179] Here, when air is blown into the medium M in the blower unit 60, the fine particles MA of the medium M are detached from the medium M due to the air pressure. In other words, the fine particles MA are removed.

[0180] When the fine film MA is removed by the blowing of the blower unit 60, there is a possibility that a portion of the airflow K may flow downstream in the +Y direction. Here, due to the presence of the suction unit 50, the space for the airflow K to advance on the support surface 28A is narrowed compared to a configuration without the suction unit 50, and the flow resistance acting on the airflow K is increased. Therefore, the airflow K flowing between the nozzle 32 and the support surface 28A can be reduced. As a result, changes in the flight state of the ink Q ejected from the nozzle 32 to the medium M can be suppressed.

[0181] As explained above, according to printer 10, in the Z-direction portion where the first fan 72 and the second fan 76 are not opposed to the opposing portion 82, the airflow K delivered from the first fan 72 and the second fan 76 directly reaches the medium M. Therefore, airflow can be used to remove dust and other foreign matter adhering to the medium M.

[0182] The airflow K that collides with the medium M or the support surface 28A extends radially from the point of collision along the medium M or the support surface 28A. Therefore, a portion of the airflow K that collides with the medium M or the support surface 28A may sometimes flow toward the nozzle 32.

[0183] Here, when viewed from the Z direction, the shape of the opening 132 of the opposing part 82 is such that the upstream of the +Y direction is more open in the X direction than the downstream. Therefore, a portion of the airflow K passing through the edge of the opening 132 and toward the medium M or the support surface 28A has a component in a direction that intersects with the +Y direction.

[0184] Moreover, the opening 132 is narrower in the X direction downstream in the +Y direction compared to upstream in the +Y direction, making it easier for a portion of the airflow K to collide with each other.

[0185] Through these actions, the airflow K passing through the edge of the opening 132 and toward the medium M or the support surface 28A can function as an air curtain. Therefore, the airflow K toward the nozzle 32 after colliding with the medium M or the support surface 28A can be effectively reduced.

[0186] In addition, by reducing the airflow K toward the nozzle 32, it is possible to suppress changes in the flight state of the ink Q ejected from the nozzle 32 toward the medium M.

[0187] According to the printer 10, compared to a configuration in which the second ridge portion 118 and the first ridge portion 102 are not present in the blowing range E1 of the first fan 72 and the blowing range E2 of the second fan 76 in the +Y direction, a portion of the airflow K from the first fan 72 and the second fan 76 toward the X direction can be efficiently used as an air curtain.

[0188] According to the printer 10, the second ridge portion 118 and the first ridge portion 102 are respectively tilted relative to the X direction in such a way that the second interval W2 is greater than the first interval W1, so that the size of the opening portion 132 in the X direction can be continuously reduced from upstream to downstream in the +Y direction.

[0189] According to the printer 10, a portion of the airflow K along the opposing surfaces 87, 107 collides with the second extensions 94, 114 or the first extensions 96, 116, thus moving upwards in the Z direction. Then, the upward-moving airflow K passes over the second extensions 94, 114 or the first extensions 96, 116 and moves downwards in the Z direction. Thus, by colliding with the second extensions 94, 114 or the first extensions 96, 116, the directional component of the airflow K is aligned with the downward-moving component in the Z direction. Therefore, even if the distance between the opposing portion 82 and the medium M in the Z direction changes, the directional component of the airflow K toward the medium M can remain consistent. Therefore, by ensuring the consistent directional component of the airflow K toward the medium M, changes in the flight state of the ink Q ejected from the nozzle 32 to the medium M can be suppressed.

[0190] According to the printer 10, the hinge portion 126 connects the retaining frame 62 and the opposing portion 82 in such a way that the position of the opposing portion 82 relative to the support surface 28A can be changed according to an external force. Here, during the operation of placing the medium M in the conveying unit 20, when the medium M or the like comes into contact with the opposing portion 82, the opposing portion 82 changes its position relative to the support surface 28A according to the applied external force. As a result, at least a portion of the opposing portion 82 can be made to avoid the support surface 28A, that is, the distance between the opposing portion 82 and the support surface 28A is increased, thus improving the workability of placing the medium M in the conveying unit 20.

[0191] According to printer 10, the blower unit 60 is removed from frame member 46 by applying an external force to magnet 69 that is greater than the magnetic force of a permanent magnet. Furthermore, the blower unit 60 is mounted to frame member 46 using the magnetic force of a permanent magnet. In this way, the blower unit 60 can be mounted with a simple configuration.

[0192] It is clear that when foreign objects such as dust adhere to the surface of the medium M, they can easily separate from the surface of the medium M after passing through the reciprocating pressing roller 42.

[0193] Here, according to the printer 10, the blower unit 60 blows air onto the medium M, which is in a state where foreign matter can be easily separated from the surface, thereby further improving the ability to remove foreign matter.

[0194] According to the blower unit 60, by performing the same function as described above for the printer 10, the airflow K passing through the edge of the opening 132 and toward the medium M or the support surface 28A can function as an air curtain. Therefore, the airflow K toward the nozzle 32 after colliding with the medium M or the support surface 28A can be effectively reduced.

[0195] According to the blower unit 60, compared to a configuration in which the second ridge portion 118 and the first ridge portion 102 are not present in the blower range E1 of the first fan 72 and the blower range E2 of the second fan 76 in the +Y direction, a portion of the airflow K from the first fan 72 and the second fan 76 toward the X direction can be efficiently used as an air curtain.

[0196] According to the blower unit 60, the second ridge portion 118 and the first ridge portion 102 are inclined relative to the X direction in such a way that the second interval W2 is greater than the first interval W1, so that the size of the opening portion 132 in the X direction can be continuously reduced from upstream to downstream in the +Y direction.

[0197] It is clear that when foreign objects such as dust adhere to the surface of medium M, they can easily separate from the surface of medium M after passing through the pressing roller 42, which moves back and forth in the +Y and -Y directions.

[0198] Here, according to the printer 10, the blower unit 60 blows air onto the medium M, which is in a state where the fine particles MA can easily separate from the surface, thereby further improving the ability to remove the fine particles MA.

[0199] Furthermore, in the +Y direction, the frame member 46 is disposed between the blower unit 60 and the nozzle 32, so that the size of the space between the blower unit 60 and the nozzle 32, where air, as an example of gas, can flow, is smaller than the size of the space without the frame member 46. In other words, the flow resistance in the space formed by the support surface 28A and the lower surface 47 is greater than the flow resistance without the frame member 46. As a result, the downstream component of the airflow K sent from the blower unit 60 to the support surface 28A in the +Y direction is reduced, that is, the airflow K toward the nozzle 32 is reduced, thereby suppressing changes in the flight state of the ink Q ejected from the nozzle 32 to the medium M.

[0200] According to the printer 10, by setting the suction unit 50, the gap between the lower surface 47 and the support surface 28A is narrowed. As a result, the flow path resistance for the airflow K flowing downstream in the +Y direction on the support surface 28A is further increased, and thus, the airflow K toward the nozzle 32 can be further reduced.

[0201] It is clear that when foreign objects such as dust adhere to the surface of the medium M, they can easily separate from the surface of the medium M after passing through the pressing roller 42, which moves back and forth in the +Y and -Y directions.

[0202] Here, according to the conveying unit 20, the medium M, which is in a state where the fine particles MA can easily separate from the surface, is blown by the blowing unit 60, thus further improving the ability to remove the fine particles MA.

[0203] Furthermore, in the +Y direction, the frame member 46 is disposed between the blower unit 60 and the nozzle 32, so that the size of the space between the blower unit 60 and the nozzle 32, where air, as an example of gas, can flow, is smaller than the size of the space without the frame member 46. In other words, the flow resistance in the space formed by the support surface 28A and the lower surface 47 is greater than the flow resistance without the frame member 46. As a result, the downstream component of the airflow K sent from the blower unit 60 to the support surface 28A in the +Y direction is reduced, that is, the airflow K toward the nozzle 32 is reduced, thereby suppressing changes in the flight state of the ink Q ejected from the nozzle 32 to the medium M.

[0204] The printer 10, blower 25 and conveyor 24 involved in the embodiments of the present invention are based on the configuration described above. However, it is undeniable that some configuration changes, omissions, combinations, etc. can be made without departing from the spirit of the present invention.

[0205] In the printer 10, the blower 25, and the conveyor 24, an opening 132 may be provided between adjacent unit units 70 in the X direction. That is, the space between the first ridge portion 122 and the second ridge portion 98 may also be regarded as the opening 132.

[0206] The number of unit 70 is not limited to five; it can be one or more other than five.

[0207] The gap 125 may not be formed between the first wind direction component 84 and the second wind direction component 104. The recesses 99, 103, 119, and 123 may not be formed in the first wind direction component 84 and the second wind direction component 104. Furthermore, the folds 92 and 112 may not be formed in the first wind direction component 84 and the second wind direction component 104.

[0208] The first ridge portion 102 and the second ridge portion 118 are not limited to inclined straight lines; they can also be portions with curves. The opening portion 132 may also not have the first extension portion 96 and the second extension portion 114.

[0209] Alternatively, a latching mechanism can be provided instead of the hinge portion 126, thereby enabling the position of the opposing portion 82 relative to the support surface 28A to be changed.

[0210] The frame component 46 may not be made of a strongly magnetic material. In this case, instead of using magnets 69 as mounting parts, bolts and nuts may be used to mount the blower unit 60 to the frame component 46. The number of magnets 69 may also be more than five.

[0211] A pressing pad can also be used instead of the pressing roller 42. The medium M can also be paper.

[0212] When removing fine MA flakes, a recovery unit that uses electrostatic force to recover the fine MA flakes can also be installed.

[0213] The suction unit 50 may not be provided between the lower surface 47 and the support surface 28A. Alternatively, other units or components may be provided instead of the suction unit 50.

Claims

1. A liquid discharge apparatus characterized by comprising: Possessing: an ejection section capable of ejecting liquid toward a conveyed medium; a support section having a support surface capable of supporting the medium; and a blast section capable of blowing air toward the medium further upstream than the ejection section in a conveying direction of the medium, the blast section possesses: a first fan that blows air toward the support surface; a second fan that is side by side with the first fan in a width direction intersecting the conveying direction, the second fan blowing air toward the support surface; and a facing member that faces the support surface in a height direction intersecting the conveying direction and the width direction, the facing member facing a portion of the first fan and a portion of the second fan in the height direction, the facing member has an opening section that is open toward the height direction, when viewed from the height direction, the opening section is positioned between the first fan and the second fan in the width direction, when a gap of the opening section in the width direction is set to a first gap at a first position in the conveying direction and is set to a second gap at a second position further upstream than the first position in the conveying direction, the second gap is larger than the first gap.

2. The liquid ejection apparatus according to claim 1, wherein the opening section has a first ridge line section and a second ridge line section that are opposite each other in the width direction, constituting at least a portion of the opening section, when viewed from the height direction, the first ridge line section is positioned within a blowing range of the first fan in the conveying direction, when viewed from the height direction, the second ridge line section is positioned within a blowing range of the second fan in the conveying direction.

3. The liquid ejection apparatus according to claim 2, wherein the first ridge line section and the second ridge line section are respectively inclined with respect to the width direction in a manner such that the second gap is larger than the first gap.

4. The liquid ejection apparatus according to claim 2 or 3, wherein the facing member has a facing surface that faces each of the first fan and the second fan, when a direction intersecting the facing surface and facing from the facing member toward the first fan and the second fan is set as a first direction, the facing member is provided with a first extension section extending from the first ridge line section toward the first direction and a second extension section extending from the second ridge line section toward the first direction.

5. The liquid ejection apparatus according to claim 1, wherein the blast section has a holding section that holds both the first fan and the second fan, the blast section is provided with a linking section that links the holding section and the facing member in a manner such that the facing member can change a position with respect to the support surface in accordance with an external force.

6. The liquid ejection apparatus according to claim 1, wherein the liquid ejection apparatus has a frame member that is composed of a material having strong magnetism and supports the ejection section, ​ The air blowing portion has a mounting portion including a permanent magnet and is detachable with respect to the frame member by a magnetic force of the permanent magnet.

7. The liquid discharge apparatus according to claim 1, wherein the support portion includes: a plurality of rollers that are rotatable; and a conveyance belt that has the support surface and is wound around the plurality of rollers, a press roller that presses the medium to the support surface is provided at a position more upstream than the discharge portion in the conveyance direction, the press roller is reciprocally movable in the conveyance direction and a conveyance opposite direction opposite to the conveyance direction, the air blowing portion is provided at a position more downstream than the press roller and more upstream than the discharge portion in the conveyance direction.

8. A blast device, characterized in that provided with: a support portion having a support surface that is capable of supporting a medium; and an air blowing portion that is capable of blowing air to the medium at a position more upstream than a discharge portion in a conveyance direction of the medium, the discharge portion being capable of discharging liquid to the medium, the air blowing portion is provided with: a first fan that blows air to the support surface; a second fan that is arranged side by side with the first fan in a width direction intersecting the conveyance direction, the second fan blowing air to the support surface; and a facing member that faces the support surface in a height direction intersecting the conveyance direction and the width direction, the facing member facing a portion of the first fan and a portion of the second fan in the height direction, the facing member has an opening portion that is open to the height direction, when viewed from the height direction, the opening portion is located between the first fan and the second fan in the width direction, when a gap of the opening portion in the width direction is set to a first gap at a first position in the conveyance direction and is set to a second gap at a second position more upstream than the first position in the conveyance direction, the second gap is larger than the first gap.

9. The air blowing apparatus according to claim 8, wherein the opening portion has a first ridge line portion and a second ridge line portion that are opposite to each other in the width direction and constitute at least a portion of the opening portion, when viewed from the height direction, the first ridge line portion is located within a blowing range of the first fan in the conveyance direction, when viewed from the height direction, the second ridge line portion is located within a blowing range of the second fan in the conveyance direction.

10. The air blowing apparatus according to claim 9, wherein the first ridge line portion and the second ridge line portion are respectively inclined with respect to the width direction in such a manner that the second gap is larger than the first gap. ​

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