JP2019155753A - Drier and droplet discharge device - Google Patents

Abstract

To provide a drier capable of suppressing generation of dew condensation on a radiation part for evaporating moisture content of droplets adhered to a recording medium by radiating laser beam to the recording medium.SOLUTION: A drier 4 comprises: a radiation part 50 for radiating laser beam to a recording medium 9 transported in a prescribed transport direction A for evaporating moisture content of droplets adhered to the recording medium; a supply part 60 for supplying air to a space between the radiation part 50 and the recording medium 9, from one of a downstream side position and an upstream side position of the transport direction A relative to the radiation part 50; and an absorption part 70 for absorbing at least some of air flowing to the upstream or downstream side of the transport direction A along the recording medium 9 at the upstream or downstream side position of the transport direction A relative to the radiation part 50. The supply part 60 is configured so that, a blowout hole 62 for blowing the air has a width W3 wider than a dimension W2 in a width direction B crossing the transport direction A of the radiation part 50, and the blowout hole extends to outside position of both end parts 50a, 50b in a width direction of the radiation part 50.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a drying device and a droplet discharge device.

  Conventionally, a drying apparatus that irradiates a recording medium with laser light to evaporate moisture of droplets adhering to the recording medium and a droplet discharge apparatus using the drying apparatus are described in, for example, Patent Documents 1 and 2 shown below. What is known.

  Patent Document 1 includes a plurality of light emitting units that are arranged at intervals along a transport direction in which a transported body including droplets is transported, and that irradiates the transported body with light to evaporate the liquid droplets. The supply unit that supplies air toward the transported body along the irradiation direction of the light to the upstream and downstream spaces in the transport direction and the space between the light emitting units with respect to the plurality of light emitting units as a whole. And a ventilating mechanism in which discharge portions from which air is discharged in the direction opposite to the irradiation direction from the transported object side are alternately arranged along the transport direction.

  Patent Document 2 discloses a discharge head that discharges droplets onto a recording medium, and a liquid that is disposed on the downstream side of the discharge head in the transport direction of the recording medium and that lands on the recording medium by irradiating the recording medium with infrared laser light. An irradiating unit for evaporating the moisture of the droplets, and a rectifying unit arranged upstream of the irradiating unit in the transport direction of the recording medium and along the transport direction, and above the recording medium from the rectifying unit A supply unit that supplies air that flows downstream in the conveyance direction of the recording medium, and at least a portion of the air that is disposed downstream of the irradiation unit in the conveyance direction of the recording medium and that has flowed above the recording medium downstream in the conveyance direction And a liquid droplet ejection device including an exhaust unit for exhausting the gas.

JP 2017-133774 A JP 2018-1509 A

  This invention relates to the fact that dew condensation occurs in the irradiation unit that irradiates the recording medium with laser light and evaporates the moisture of the droplets adhering to the recording medium. Compared to the case where the air outlet does not have a width wider than the widthwise dimension of the irradiation part and does not exist outside the both ends of the irradiation part in the widthwise direction. The present invention provides a drying apparatus that can perform the above and a droplet discharge apparatus using the drying apparatus.

The drying device of this invention (A1)
An irradiation unit that irradiates a recording medium conveyed in a predetermined conveyance direction with laser light to evaporate the moisture of droplets attached to the recording medium;
A supply unit for supplying air between the irradiation unit and the recording medium from one of the downstream side and the upstream side in the transport direction from the irradiation unit;
An absorber that absorbs at least a portion of the air flowing upstream or downstream in the transport direction along the recording medium at a position upstream or downstream in the transport direction from the irradiation unit;
With
The supply unit has an outlet that blows out the air having a width that is wider than a dimension in the width direction intersecting the transport direction of the irradiation unit, and is located outside both ends of the irradiation unit in the width direction. It exists even in the position.

The drying device of this invention (A2) is the drying device of the above-mentioned invention A1, wherein the supply unit has an end portion located outside both ends of the irradiation unit in the outlet, and the irradiation unit supplies the air to the irradiation unit. It is provided so that it blows out toward the side where there is and in the direction parallel to the recording medium.
The drying device of this invention (A3) is the drying device of the above-mentioned invention A2, in which the supply unit includes an inner portion of the air outlet along the width direction of the irradiating unit, and the irradiating unit Between the recording medium and the recording medium so as to blow in a direction obliquely intersecting the recording medium.
In the drying device of the invention (A4), in the drying device of the invention A2 or A3, the opening height of the end portion in the blowout port exists along the width direction of the irradiation unit in the blowout port. It is comprised so that it may become a dimension smaller than the opening height of an inner side part.
The drying apparatus according to the present invention (A5) is the drying apparatus according to the above-described invention A1, wherein at least the irradiation section extends from an end portion outside the both ends of the irradiation section of the outlet of the supply section. A facing surface portion facing the recording medium is disposed in a range and at a position opposite to the supply portion with the recording medium interposed therebetween.
The drying device of this invention (A6) is the drying device of the above-mentioned invention A5, wherein the facing surface portion is arranged so as to exist also in a range outside the both end portions of the irradiation unit.
The drying device according to the present invention (A7) is the drying device according to any one of the above-described inventions A1 to A6, wherein the absorption part has a width in which the suction port for sucking the air is narrower than the widthwise dimension of the irradiation part. It is formed with the dimension of.

In addition, the droplet discharge device of the present invention (B1)
A droplet discharge unit that discharges droplets onto a recording medium that is transported in a predetermined transport direction, and a position downstream of the droplet discharge unit in the transport direction, and irradiates the recording medium with laser light. And a drying unit that evaporates and dries the moisture of the droplets adhering to the recording medium,
The drying section is configured by the drying device according to any one of the inventions A1 to A7.

  According to the drying apparatus of the invention A1, condensation occurs in the irradiation unit that irradiates the recording medium with laser light and evaporates the moisture of the droplets attached to the recording medium. When the air outlet in the supply unit for supplying air does not have a width wider than the widthwise dimension of the irradiating part and does not exist at positions corresponding to the outside of both ends in the widthwise direction of the irradiating part Can be suppressed compared to

According to the drying apparatus of the invention A2, it is possible to prevent the air blown from the end of the outlet in the supply section from passing outside the both ends in the width direction of the recording medium.
According to the drying apparatus of the invention A3, the air blown from the inner side of the outlet in the supply unit is blown to the surface layer of the recording medium, and the air layer containing water vapor generated from the droplets can be efficiently eliminated.
According to the drying device of the invention A4, the wind speed of the air blown out from the end of the outlet in the supply unit is relatively increased, and the air curtain (air) is positioned outside the irradiation unit and both ends in the width direction of the recording medium. Can be formed.
According to the drying apparatus of the invention A5, it is possible to prevent the air blown out from the end of the outlet in the supply section from passing outside the both ends in the width direction of the recording medium.
According to the drying apparatus of the invention A6, the air blown from the end portion of the outlet in the supply portion can be efficiently supplied to positions outside both end portions in the width direction of the irradiation portion.
According to the drying apparatus of the invention A7, it is possible to reduce the width of the absorption part while ensuring that the occurrence of dew condensation in the irradiation part is suppressed.

  Further, according to the droplet discharge device of the invention B1, it is possible to suppress the occurrence of dew condensation in the irradiation unit that irradiates the recording medium with laser light and evaporates the moisture of the droplets adhering to the recording medium in the drying device. Therefore, there is no possibility that the condensation forms water droplets and adheres to the recording medium.

1 is a conceptual diagram illustrating a configuration of a droplet discharge device according to Embodiment 1. FIG. It is a conceptual diagram which shows the structure of the drying apparatus which concerns on Embodiment 1 in a partial cross section. It is a conceptual diagram which shows the structure of the drying apparatus of FIG. 2 in the state seen from upper direction. It is a conceptual diagram which shows the operation state of the drying apparatus of FIG. 2 in the state seen from upper direction. It is a conceptual diagram which shows the structure of the drying apparatus which concerns on Embodiment 2 in a partial cross section. (A) is a schematic end elevation which shows the part which follows the Q1-Q1 line of the drying apparatus of FIG. 5, (b) is a schematic end view which shows the part which follows the Q2-Q2 line of the drying apparatus. It is a conceptual diagram which shows the operating state of the drying apparatus of FIG. 5 in the state seen from upper direction. It is a conceptual diagram which shows the structure of the drying apparatus which concerns on Embodiment 3 in a partial cross section. (A) is a schematic end view which shows the part which follows the Q1-Q1 line of the drying apparatus of FIG. 8, (b) is a schematic end view which shows the part which follows the Q2-Q2 line of the drying apparatus. It is a conceptual diagram which shows the operating state of the drying apparatus of FIG. 8 in the state seen from upper direction. It is a conceptual diagram which shows the structure of the drying apparatus which concerns on Embodiment 4 and its modification in a partial cross section. It is a conceptual diagram which shows the structure of the drying apparatus of FIG. 11 in a partial cross section. It is a conceptual diagram which shows the operation state of the drying apparatus of FIG. 11 in the state seen from upper direction. It is a conceptual diagram which shows the structure of the drying apparatus which concerns on Embodiment 5 in a partial cross section. It is a conceptual diagram which shows the operation state of the drying apparatus of FIG. 14 in the state seen from upper direction. It is a conceptual diagram which shows the structure of the drying apparatus of a comparison object in the state seen from upper direction.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

[Embodiment 1]
1 to 3 show a droplet discharge device provided with a drying device according to the first embodiment. FIG. 1 shows the overall configuration of the droplet discharge device, and FIGS. 2 and 3 show the configuration of the drying device, respectively.
Arrows indicated by reference signs X, Y, and Z in each drawing indicate the width, height, and depth directions of the three-dimensional space assumed in each drawing. In FIG. 1, FIG. 2, etc., a circle at the intersection of the X and Y directions indicates that the Z direction is directed vertically downward in the drawing.

<Configuration of droplet discharge device>
The droplet discharge device 1 according to Embodiment 1 is an inkjet that forms images such as characters, figures, patterns, and photographs by discharging ink droplets that are examples of droplets onto continuous paper 9 that is an example of a recording medium. It is configured as a recording device.

  As shown in FIG. 1, the liquid droplet ejection apparatus 1, which is an ink jet recording apparatus, includes an image forming unit 10 that forms an image by ejecting ink droplets onto a continuous paper 9, and a continuous paper 9 on the image forming unit 10. And a winding unit 25 that winds the continuous paper 9 after the image is formed by the image forming unit 10.

  The delivery unit 20 is configured by a rotatable delivery roll 22, a support roll 23, and the like on which the continuous paper 9 is wound in a roll shape. The sending unit 20 feeds a necessary amount (length) of the continuous paper 9 and feeds it from the roll 22, and then sends it to the image forming unit 10 through the support roll 23. Incidentally, the actual conveyance of the continuous paper 9 is performed using, for example, the winding power of the winding unit 25.

  The winding unit 25 includes a winding roll 27, a support roll 28, and the like that wind up the continuous paper 9 after the image is formed. The take-up unit 25 is configured to take up the continuous paper 9 fed from the image forming unit 10 through the support roll 28 when the take-up roll 27 is rotationally driven.

  Further, inside the image forming unit 10, the continuous paper 9 is conveyed at a required speed while passing through a required position along a conveyance path formed by a plurality of support rolls 12 and the like. An arrow A in the drawing indicates the conveyance direction of the continuous paper 9.

The image forming unit 10 includes a housing 11 that also serves as a storage chamber, a droplet discharge unit 30 that is disposed in the housing 11, a drying unit 40, and the like.
Of these, the housing 11 includes an opening / closing door (not shown) that opens and closes to allow access to the inside when performing maintenance and inspection work.

The droplet discharge unit 30 is a part related to a configuration that discharges ink droplets onto the conveyed continuous paper 9 according to image information.
The droplet discharge unit 30 includes four ink recording heads 32Y, 32M, 32C, and 32K that individually discharge ink droplets of four colors, yellow (Y), magenta (M), cyan (C), and black (K). A driving device (not shown) that drives each ink recording head 32 (Y, M, C, K) based on image information and the like, and each ink recording head 32 (Y, M, C, K) has ink of each color. Ink replenishing device (not shown) for replenishing each of the above.

  The ink recording heads 32 (Y, M, C, K) are arranged in a line in the order of Y, M, C, K along the transport direction A of the continuous paper 9 at a position above the continuous paper 9. Has been placed. Further, each of the ink recording heads 32 (Y, M, C, K) has a configuration in which a plurality of nozzles that eject ink droplets with a predetermined size are arranged in a predetermined pattern. The ink recording heads 32 (Y, M, C, K) are driven by a driving device (not shown) based on image information input to the droplet discharge device 1.

  The droplet discharge unit 30 is provided for each nozzle in the ink recording head 32 (Y, M, C, K) with respect to one side of the continuous paper 9 that is supported and conveyed so as to be in a substantially horizontal state in the housing 11. Ink droplets of a predetermined color are ejected in accordance with image information. As a result, ink droplets of some or all of the four colors are attached to one side of the continuous paper 9 so as to form an image, thereby forming an image made of ink.

  The drying unit 40 is arranged at a position downstream of the droplet discharge unit 30 in the transport direction A of the continuous paper 9 and irradiates the continuous paper 9 after passing through the droplet discharge unit 30 with laser light. This is a portion related to the configuration in which the moisture of the ink droplets ejected by the droplet ejection unit 30 on the continuous paper 9 is evaporated and dried.

<Configuration of drying device>
As shown in FIGS. 1 to 3, the drying unit 40 includes a drying device 4 </ b> A including at least an irradiation unit 50, a supply unit 60, and an absorption unit 70.

The irradiation unit 50 is a part that irradiates the continuous paper 9 that passes through the droplet discharge unit 30 and is conveyed in the conveyance direction A with a laser beam for evaporating the moisture of the ink droplets.
The irradiation unit 50 includes a laser light source 51 that emits laser light, a cooling device 54 that cools the laser light source 51, a light shielding unit 55 that blocks or absorbs unnecessary laser light that has passed through the continuous paper 9 and the like. Yes.

Of these, the laser light source 51 may be any laser light source that can irradiate a desired laser beam suitable for drying. In the first embodiment, for example, a vertical cavity surface emitting laser (VCSEL) unit is applied. is doing.
Further, the laser light source 51 is configured to irradiate a laser beam on the entire region in the width direction B intersecting the transport direction A of the continuous paper 9 to be used. Further, the laser light source 51 has a light exit surface 52 having a width dimension W2 that is the same as or slightly wider than the width dimension W1 in the width direction B of the continuous sheet 9 at a portion facing the continuous sheet 9 (in this example, a lower surface portion). For example, a glass plate is disposed on the light exit surface 52. Further, the laser light source 51 is arranged so that its light exit surface 52 is spaced from the continuous paper 9 by a predetermined distance.

As the cooling device 54, for example, a water cooling jacket or the like is applied. The cooling device 54 may be omitted when the laser light source 51 does not need to be cooled.
The laser light source 51, the cooling device 54, the glass plate constituting the light exit surface 52, and the like are held by a holding member 53. The holding member 53 is held in a state of surrounding the side portions of the laser light source 51, the cooling device 54, the glass plate, and the like, for example.

  The light shielding portion 55 is a portion that is disposed at a position where laser light irradiation, such as a position opposite to the laser light source 51, with the continuous paper 9 interposed therebetween should be avoided. The light shielding portion 55 is configured by arranging a member having at least a portion made of a material such as aluminum or nickel plating in a state of a required size and shape. Further, the light shielding portion 55 is arranged in a non-contact state with the continuous paper 9.

The supply unit 60 is a portion that supplies air from the position downstream of the irradiation unit 50 in the transport direction A of the continuous paper 9 to the irradiation unit 50 and the continuous paper 9.
The supply unit 60 includes a supply duct 61 disposed at a position downstream of the irradiation unit 50 in the conveyance direction A of the continuous paper 9, a blower device 66 that generates and sends the necessary air to the supply duct 61, and a supply duct. The connection pipe 67 etc. which connect between 61 and the air blower 66 and send the air generated with the air blower 66 to the supply duct 61 are comprised.

Among these, the supply duct 61 is a hollow structure and is arranged in a state of being close to the continuous paper 9. Further, the supply duct 61 is provided with an air outlet 62 </ b> A for blowing out air at an end portion on the side approaching the continuous paper 9. Further, the supply duct 61 is connected to a connection pipe 67 at a substantially central portion at the end opposite to the continuous paper 9.
The blower device 66 is disposed, for example, in a part of the housing 11, takes in outside air, generates necessary air, and sends it to the supply duct 61.

The absorption unit 70 is a part that absorbs at least a part of the air flowing along the continuous paper 9 upstream in the transport direction A at a position upstream of the irradiation unit 50 in the transport direction A of the continuous paper 9.
The absorption unit 70 includes an absorption duct 71 disposed at a position upstream of the irradiation unit 50 in the transport direction A of the continuous paper 9, and an intake device 76 that intakes air to generate a suction force necessary for the absorption duct 71. The suction duct 71 and the intake device 76 are connected to each other, and a connection pipe 77 that applies the suction force generated by the intake device 76 to the suction duct 71 is formed.

Among these, the absorption duct 71 is a hollow structure, and is arranged in a state of being close to the continuous paper 9. Further, the absorption duct 71 is provided with a suction port 72 for sucking air at an end portion on the side approaching the continuous paper 9. Further, the absorption duct 71 is connected to the connection pipe 77 at a substantially central portion at the end opposite to the continuous paper 9.
The intake device 76 is disposed in a part of the casing 11 of the image forming unit 10, and exhausts the sucked air to the outside of the casing 11.
If necessary, the absorption unit 70 may be a filter unit 78 for capturing unnecessary substances contained in the sucked air at a required position such as a connecting pipe 77 as shown by a two-dot chain line in FIG. You may provide the moisture absorption part 79 which absorbs the water | moisture content contained in the air. When providing such a filter part 78 and the moisture absorption part 79, you may make it recycle, for example by sending the air absorbed by the absorption duct 71 of the absorption part 70 to the ventilation apparatus 66 etc. of the supply part 60. FIG.

  In the drying device 4A, as shown in FIG. 3, the outlet 62A of the supply duct 61 in the supply unit 60 has a width W3 wider than the width W2 in the width direction B of the irradiation unit 50. It is comprised so that it may exist even in the position of the outer side rather than the both ends 50a and 50b of the width direction B of the irradiation part 50. FIG.

Here, both end portions 50 a and 50 b in the width direction B of the irradiation unit 50 are portions at both ends in the width direction B of the portion including the holding member 53 that holds the laser light source 51. However, for example, when the both end portions in the width direction B of the holding member 53 have a shape that protrudes significantly outside the both end portions 9a and 9b in the width direction B of the continuous paper 9, or the portions at both ends are unclear. In some cases, the light emitting surfaces 52 of the irradiating unit 50 are located at both ends in the width direction B.
Further, the position of the air outlet 62A outside the both end portions 50a, 50b of the irradiation unit 50 is, for example, the wind speed when the air supplied from the supply duct 61 flows through the space between the irradiation unit 50 and the continuous paper 9. It may be set from the viewpoint that the position becomes farther away as the value of becomes larger. Specifically, when the wind speed is 8 to 16 m / sec, the outer position is set to a position about 15 cm away from both ends 50a and 50b of the irradiation unit 50, and the wind speed is 16 In the case of ˜25 m / sec, the irradiation unit 50 is positioned about 25 cm away from both ends 50a and 50b. Reference numerals m1 and m2 in FIG. 3 indicate the protruding amounts of both end portions that protrude outward from the both end portions 50a and 50b of the irradiation unit 50 of the air outlet 62, respectively. The protrusion amounts m1 and m2 are set to the same value, but may be set to different values as necessary.

  On the other hand, as shown in FIG. 3, the suction port 72 of the absorption duct 71 in the absorption part 70 has substantially the same width dimension as the width dimension W2 in the width direction B of the irradiation part 50. It arrange | positions so that it may become a position substantially corresponded with the both ends 50a and 50b of the width direction B of the irradiation part 50. FIG.

Further, the air outlet 62A of the supply duct 61 according to the first embodiment is configured in the same shape in the entire region in the width direction B as shown in FIGS. Specifically, the air outlet 62A has a shape and a structure capable of blowing air in a direction substantially parallel to the continuous paper 9 toward the side where the irradiation unit 50 is located.
Hereinafter, as shown in FIG. 3, portions of the air outlet 62A that are present outside the both end portions 50a and 50b of the irradiation unit 50 are referred to as air outlet ends 62Aa and 62Ab. Of these, a portion (a portion excluding the end portions 62Aa and 62Ab) existing along the width direction B of the irradiation unit 50 may be referred to as an inner portion 62Ac of the air outlet.

  On the other hand, the suction port 72 of the absorption duct 71 in the first embodiment is configured in the same shape in the entire region in the width direction B as shown in FIGS. Specifically, the suction port 72 has a shape and a structure opened toward the side where the irradiation unit 50 is located.

<Operation of the droplet discharge device and the drying device>
In the droplet discharge device 1, when an instruction for requesting an image forming operation is received by a control unit (not shown), the image forming unit 10, the sending unit 20, and the winding unit 25 are started.
As a result, the continuous paper 9 is conveyed from the sending unit 20 so as to be fed into the image forming unit 10, and is conveyed so as to be taken up by the winding unit 25 after passing through the image forming unit 10.

At this time, in the image forming unit 10, the droplet discharge unit 30 has a predetermined color from the ink recording head 32 (Y, M, C, K) necessary for one side of the continuous paper 9 that is conveyed and passed. Ink droplets are ejected in accordance with image information.
As a result, ink droplets 35 (FIG. 2) of a color mixed with the discharged color are attached to one side of the continuous paper 9 in a state of constituting an image, and an image made of ink is formed.

At this time, in the image forming unit 10, the drying device 4 </ b> A of the drying unit 40 passes through the droplet discharge unit 30 and is conveyed with the ink droplets 35 attached as shown in FIG. 2. 9 is irradiated with laser light from a laser light source 51 of the irradiation unit 50.
Moreover, in the drying device 4A at this time, as shown in FIG. 2 and FIG. 4, air (broken line or double line) extends from the outlet 62A of the supply duct 61 in the supply unit 60 to between the irradiation unit 50 and the continuous paper 9. (Dotted line arrow) is supplied, and at least part of the air (broken arrow) flowing upstream in the transport direction A along the continuous paper 9 is absorbed by the suction port 72 of the absorption duct 71 in the absorption unit 70. .

As a result, the ink droplets 35 adhering to the continuous paper 9 are evaporated by instantaneously raising the water contained in the ink to a temperature at which the water is boiled by the irradiation of the laser beam from the irradiation unit 50.
As a result, in the continuous paper 9, bleeding due to penetration of moisture due to the adhesion of the ink droplets 35 is reduced, and an image made of ink (coloring material) 35A in which moisture is evaporated as shown in FIG. Is formed.

Further, in the drying device 4 </ b> A, the supply of air by the supply unit 60 and the absorption of air by the absorption unit 70 are performed before and after the conveyance direction A of the continuous paper 9 with the irradiation unit 50 interposed therebetween. As a result, an air flow that flows toward the upstream side in the transport direction A of the continuous paper 9 (see FIG. 4) in a gap existing between the irradiation unit 50 that is irradiated with the laser light and the continuous paper 9. ) Is formed.
As a result, the water vapor evaporated from the ink droplets 35 by the laser light irradiation and floating on the continuous paper 9 is transported so as to be peeled off from the continuous paper 9 by the air flow flowing in the upstream direction of the conveying direction A. At the same time, it is absorbed by the absorption duct 71 of the absorber 70 together with the air of the air flow. At this time, the air containing water vapor absorbed by the absorption unit 70 is finally exhausted to the outside of the housing 11.

  Therefore, in the drying device 4A, the water vapor generated by the evaporation of the water in the ink droplet 35 is suppressed from staying in the gap between the irradiation unit 50 and the continuous paper 9. This suppresses or prevents water vapor from re-adhering to the continuous paper 9, and water vapor from adhering to the light exit surface 52 and the holding member 53 of the irradiating unit 50 to cause dew condensation.

  Moreover, in this drying apparatus 4A, since the blower outlet 62A of the supply duct 61 in the supply part 60 exists in the position outside the both ends 50a and 50b of the irradiation part 50, FIG. As illustrated in FIG. 5, air (Ea, Eb) is also blown out from the end portions 62Aa, 62Ab of the outlets.

  As a result, the air blown out from the outlet 62A of the supply duct 61 is in a substantially uniform state in the entire area in the width direction B of the continuous paper 9 as illustrated by the two-dot chain arrow in FIG. It flows toward the upstream side in the conveyance direction A. In other words, the air blown out from the blowout port 62A at this time is particularly the end portion in the width direction B of the continuous paper 9 due to the presence of air (Ea, Eb) blown out from the end portions 62Aa and 62Ab of the blowout port. The air (Ec1, Ec2) flowing so as to pass through the vicinity of 9a, 9b flows almost linearly along the conveying direction A as illustrated in FIG.

  As a result, the air blown out from the air outlet 62A of the supply duct 61 is an air flow that uniformly passes through the portion facing the continuous paper 9 of the irradiation unit 50 including the regions near both end portions 50a and 50b of the irradiation unit 50. The flow surely flows so as to pass not only the central portion in the width direction B of the irradiation unit 50 but also the vicinity of both end portions 50a and 50b.

  Thus, according to the drying device 4A, the staying water vapor adheres to the vicinity of both end portions 50a and 50b (including part of the holding member 53) in the portion of the irradiation unit 50 facing the continuous paper 9. Occurrence of condensation is suppressed. In addition, for example, there is no possibility that dew condensation generated in the vicinity of both end portions 50a and 50b of the portion of the irradiation unit 50 facing the continuous paper 9 will drop and adhere to the continuous paper 9 as water droplets. In addition, there is no possibility that a part of the irradiation unit 50 is damaged due to the occurrence of dew condensation on a part of the irradiation unit 50 in the vicinity of both ends 50a and 50b.

  On the other hand, as a supply duct of the supply unit 60, instead of the supply duct 61, the air outlet 620 has a dimension W4 having substantially the same width as the width dimension W2 of the irradiation unit 50, as illustrated in FIG. However, the comparative drying apparatus 400 to which the supply duct 610 configured so as not to exist outside the both end portions 50a and 50b of the irradiation unit 50 has the following problems.

That is, in this comparative drying apparatus 400, the air blown out from the outlet 620 of the supply duct 610 flows in the state illustrated by the two-dot chain arrow in FIG. That is, a part of the air blown out from the outlet 620 is bent and flows so as to pass inside the both end portions 50a and 50b in the width dimension W2 of the irradiation unit 50, and both end portions 50a of the irradiation unit 50 are flown. , 50b and the continuous paper 9 in the region surrounded by the broken line in the figure, the vortex stays as illustrated by the broken arrow in the figure.
As a result, water vapor in the staying air adheres to the vicinity of both end portions 50a and 50b in the portion of the irradiation unit 50 facing the continuous paper 9, and condensation occurs. Further, at least a part of the continuous paper 9 may be deformed so as to be loosened due to the influence of water vapor contained in the staying air, and may become wrinkles.

  In this regard, according to the drying device 4A according to the first embodiment, as described above, water vapor contained in the air staying in the vicinity of both end portions 50a and 50b of the portion facing the continuous paper 9 of the irradiation unit 50 adheres. As a result, the occurrence of condensation is suppressed.

[Embodiment 2]
5 and 6 show a drying device 4B according to the second embodiment.
The drying device 4B according to the second embodiment has the same configuration as that of the drying device 4A according to the first embodiment except that the outlet of the supply duct 61 in the supply unit 60 is changed to an outlet 62B having another configuration. It will be.

As shown in FIG. 6 (b), the supply duct 61 in the second embodiment allows air to flow through the air outlets 62B and 62Bb existing outside the both ends 50a and 50b of the irradiation unit 50 in the air outlet 62B. It is provided so as to blow toward the side where the irradiation unit 50 exists and in a direction parallel to the continuous paper 9, in other words, in a direction parallel to the light exit surface 52 of the irradiation unit 50. The parallel direction is a direction included in a range of ± 2 ° with respect to the surface of the continuous paper 9, for example.
The end portions 62Ba and 62Bb of the air outlets in the second embodiment have a passage having an inner wall surface extending in a direction parallel to the light exit surface 52 of the continuous paper 9 or the irradiation unit 50 at the lower end portion facing the continuous paper 9 of the supply duct 61. It has a prepared structure.

In addition, in the supply duct 61, as shown in FIG. 6A, air is applied to the irradiation unit 50 and the continuous paper in the inner portion 62Bc existing along the width direction B of the irradiation unit 50 in the outlet 62B. 9 and is blown out in a direction that obliquely intersects the continuous paper 9. The direction intersecting obliquely is the direction when the crossing angle on the side close to the surface of the continuous paper 9 is in the range of 5 to 85 °.
The inner portion 62Bc of the air outlet in the second embodiment is inclined at the lower end facing the continuous paper 9 of the supply duct 61 and is inclined to approach the irradiation unit 50 as it approaches the continuous paper 9, and to the lower end side of the inclined surface. It has a structure with an existing opening.

<Operation of drying device>
In the droplet discharge device 1 provided with the drying device 4B, air is supplied by the supply unit 60 of the drying device 4B to a gap that exists between the irradiation unit 50 that is irradiated with laser light and the continuous paper 9. Supplying and air absorption by the absorption unit 70 of the drying device 4B are performed before and after the irradiation unit 50 in the conveyance direction A of the continuous paper 9, so that the continuous paper 9 is substantially the same as in the first embodiment. An air flow (see FIG. 6A) that flows toward the upstream side in the transport direction A is formed.

At this time, in the supply duct 61 of the supply unit 60, as shown in FIG. 6A, the air Ec is blown out in an obliquely intersecting direction with respect to the continuous paper 9 from the inner portion 62Bc of the outlet 62B. .
Accordingly, in the drying device 4B, the air Ec blown from the inner portion 62Bc of the blowout outlet in the supply duct 61 is first blown to the surface of the continuous paper 9, and the air flow is conveyed in the conveying direction A of the continuous paper 9. Combined with the flow in the upstream direction, the air layer containing water vapor generated by the evaporation of the water in the ink droplet 35 by the irradiation of the laser beam in the irradiation unit 50 is efficiently stripped off. Further, the air in the peeled air layer is also absorbed by the absorption duct 71 of the absorption unit 70.

Further, in the supply duct 61 of the supply unit 60, as shown in FIG. 6B, air Ed and Ee are directed from the end portions 62Ba and 62Bb of the air outlet 62B toward the side where the irradiation unit 50 is located and continuous paper. 9 is blown out in a direction parallel to 9.
As a result, in the drying device 4B, the air Ed and Ee blown from the outlet ends 62Ba and 62Bb of the supply duct 61 are disposed between the irradiation unit 50 and the continuous paper 9 as shown in FIG. 6B. For example, as illustrated by the two-dot chain line arrow Ex in the figure, it is prevented that the paper passes through both ends 9a and 9b of the continuous paper 9 and is wasted. .
Moreover, the air Ed and Ee blown from the outlet ends 62Ba and 62Bb of the supply duct 61 are irradiated until part of the air Ed and Ee is absorbed by the absorption duct 71 of the absorber 70 as illustrated in FIG. For example, the air Ec blown out from the inner side 62Bc of the air outlet closes to both ends 50a, 50b of the portion facing the continuous paper 9 of the irradiation unit 50. Also flows to ensure passage.

  Thus, according to the drying device 4B, the air supplied from the inner portion 62Bc of the outlet 62B of the supply unit 60 surely flows between the irradiation unit 50 and the continuous paper 9 over the entire region in the width direction B. Therefore, it is even more likely that the staying water vapor adheres to the vicinity of both end portions 50a and 50b (including part of the holding member 53) in the portion of the irradiation unit 50 facing the continuous paper 9 to cause dew condensation. It is suppressed.

[Embodiment 3]
8 and 9 show a drying device 4C according to the third embodiment.
The drying device 4C according to the third embodiment is the case of the drying devices 4A and 4B according to the first and second embodiments except that the drying device 4C is changed to the outlet 62C having another configuration as the outlet of the supply duct 61 in the supply unit 60. It consists of the same composition.

  As shown in FIG. 9 (b), the supply duct 61 in the third embodiment has both ends 62Ca and 62Cb existing outside the both ends 50a and 50b of the irradiation unit 50 in the outlet 62C. The opening height h2 is configured to be smaller than the opening height h1 of the inner portion 62Cc existing along the width direction B of the irradiation unit 50 in the outlet 62C. For example, the opening height h2 of the end portions 62Ca and 62Cb of the air outlet 62C is set to a size of about 0.3 to 0.7 times the opening height h1 of the inner portion 62Cc of the air outlet 62C.

  Moreover, in this supply duct 61, as shown in FIG. 9A, the supply duct 61 in Embodiment 1 is provided for the inner portion 62Cc that exists along the width direction B of the irradiation unit 50 in the outlet 62C. Similarly to the case of the inner portion 62Ac of the air outlet 62A (FIG. 2), the shape and the structure are open toward the side where the irradiation unit 50 is located.

<Operation of drying device>
In the droplet discharge device 1 provided with the drying device 4C, the supply of air by the supply unit 60 of the drying device 4C and the absorption of air by the absorption unit 70 of the drying device 4C are performed on the continuous paper 9 across the irradiation unit 50. It is performed before and after the conveyance direction A. As a result, in the gap existing between the irradiation unit 50 where the laser beam is irradiated and the continuous paper 9, the upstream side in the transport direction A of the continuous paper 9 is almost the same as in the first embodiment. An air flow (refer to FIG. 9A) flowing toward the head is formed.

At this time, in the supply duct 61 of the supply unit 60, the air E is blown out in the direction substantially parallel to the continuous paper 9 from the inner portion 62Cc of the blowout port 62C (FIG. 9A). Air Ed2 and Ee2 are blown out from the end portions 62Ca and 62Cb of 62C toward the side where the irradiation unit 50 is located and in a direction parallel to the continuous paper 9 (FIG. 9B).
In addition, the air speeds Ed2 and Ee2 blown from the end portions 62Ca and 62Cb of the air outlet 62C at this time are relatively higher than the air speed of the air E blown from the inner portion 62Cc of the air outlet 62C. .

  As a result, in the drying device 4C, the air Ed2 and Ee2 blown out from the end portions 62Ca and 62Cb of the outlet 62C in the supply duct 61, as illustrated in FIG. A so-called air curtain, which is a curtain of airflow that flows at a relatively higher speed than the air blown from the inner part 62Cc of the outlet 62C, is formed at a position outside the both ends 9a, 9b of the paper 9.

  As a result, according to the drying device 4C, the air supplied from the inner portion 62Cc of the outlet 62C of the supply unit 60 surely flows between the irradiation unit 50 and the continuous paper 9 over the entire region in the width direction B. Therefore, it is suppressed that the staying water vapor adheres to the vicinity of both end portions 50a and 50b (including a part of the holding member 53) in the portion of the irradiation unit 50 facing the continuous paper 9 to cause dew condensation. The In addition to this, the formation of the air curtain suppresses or prevents unnecessary dust and outside air from flowing into the space between both ends 50a and 50b of the irradiation unit 50 and the continuous paper 9, in particular. A black circle and a two-dot chain line arrow in FIG. 10 indicate an example of an unnecessary object such as unnecessary dust and outside air and its moving state.

[Embodiment 4]
11 and 12 show a drying device 4D according to the fourth embodiment.
The drying device 4D according to the fourth embodiment is different from the drying device 4D according to the first embodiment except that a facing surface portion 80 facing the continuous paper 9 is disposed at a position opposite to the supply unit 60 with the continuous paper 9 interposed therebetween. The configuration is the same as in 4A.

  As shown in FIGS. 11 and 12, the facing surface portion 80 is at a position opposite to the supply portion 60 as described above, and from the end portions 62 </ b> Aa and 62 </ b> Ab of the outlet 62 </ b> A of the supply duct 61 in the supply portion 60. It is arranged in a range up to at least the irradiation unit 50. The facing surface portion 80 only needs to have a facing surface 80a that faces at least a position opposite to the supply portion 60 in a state substantially parallel to the continuous paper 9 within a required range.

In the fourth embodiment, the opposing surface portion 80 is configured by a flat plate member. The opposing surface portion 80 made of a flat plate-like member is configured as two opposing surface portions 81 and 82 that are separately arranged so as to correspond to the end portions 62Aa and 62Ab of the air outlet 62A.
Further, the facing surface portion 80 (81, 82) is downstream of the conveyance direction A of the continuous paper 9 from the end portions 62Aa, 62Ab of the air outlet 62A to the downstream side in the conveyance direction A on the light exit surface 52 of the irradiation unit 50. The width and shape exist up to the range up to the one end 52d. Further, the opposing surface portion 80 (81, 82) is arranged with respect to the width direction B of the continuous paper 9 from both ends 9a, 9b of the continuous paper 9 from positions outside the end portions 62Aa, 62Ab of the outlet 62A. It has a width and shape that exist up to the overlapping position.
11 and 12, the reference symbol L1 indicates the distance between the end portions 62Aa and 62Ab of the air outlet 62A and the one end portion 52d of the light exit surface 52 of the irradiation unit 50, and the reference symbol L2 indicates the end portions 62Aa and 62Ab of the air outlet 62A. And the one end portion 53d on the downstream side in the transport direction A of the holding member 53 in the irradiation unit 50 are shown.

Further, in the fourth embodiment, as shown in FIG. 12, the facing surface portion 80 is configured as a separate member from the light shielding portion 55 in the irradiation portion 50, and exists between the continuous paper 9 and the light shielding portion 55. Is arranged. The facing surface portion 80 at this time is arranged in a state where the facing surface 80a is spaced from the back surface of the continuous paper 9 (the surface opposite to the surface facing the irradiation unit 50), but the continuous paper 9 You may arrange | position so that the back surface of 9 may be contacted.
The facing surface portion 80 only needs to be made of, for example, the same material as the light shielding portion 55, and may be configured integrally with the light shielding portion 55 (a part of the light shielding portion 55 is used as the facing surface portion 80). Good.

<Operation of drying device>
In the droplet discharge device 1 provided with the drying device 4D, the supply of air by the supply unit 60 of the drying device 4D and the absorption of air by the absorption unit 70 of the drying device 4D are continuous paper 9 across the irradiation unit 50. This is performed before and after the conveyance direction A. As a result, in the gap existing between the irradiation unit 50 where the laser beam is irradiated and the continuous paper 9, the upstream side in the transport direction A of the continuous paper 9 is almost the same as in the first embodiment. A flow of air (see FIG. 12) is formed.

At this time, in the supply duct 61 of the supply unit 60, as shown in FIGS. 2 and 12, air is irradiated from the entire area in the width direction B of the outlet 62A (all of the inner part 62Ac and the end parts 62Aa, 62Ab). It blows out in the direction parallel to the continuous paper 9 toward the side where the part 50 is located.
In the drying device 4D, the facing surface portion 80 (81, 82) is disposed.

For this reason, in the drying device 4D, as shown in FIG. 12 and FIG. 13, the air blown from the air outlet 62A of the supply duct 61 is substantially the same as in the case of the actual form 1, and the irradiation unit 50 and the continuous paper 9 It will begin to pass toward you.
In addition to this, in the drying device 4D, the air Ef and Eg blown out from the end portions 62Aa and 62Ab of the air outlet 62A in particular flows in the direction of flow to the irradiation unit 50 due to the presence of the opposing surface portion 80 (81 and 82). As shown by the two-dot chain line arrow Ex in FIG. 12, it passes through the direction away from the irradiation unit 50 outside the both ends 9a and 9b of the continuous paper 9, and is wasted. Is reliably prevented. Further, when the air Ef, Eg flows without passing through, the air blown out from the inner portion 62Ac of the blowout port 62A passes between the irradiation unit 50 and the continuous paper 9, and the absorption unit 70 (the suction port 72). To flow efficiently.

  As a result, in the drying device 4D, the air supplied from the supply unit 60 surely flows between the irradiation unit 50 and the continuous paper 9 including the regions near both end portions 50a and 50b of the irradiation unit 50. In addition, it is possible to suppress wasteful generation of dew condensation due to adhering water vapor in the vicinity of both end portions 50a and 50b (including part of the holding member 53) in the portion of the irradiation unit 50 facing the continuous paper 9. And efficiently suppressed.

<Modification of Embodiment 4>
In the drying apparatus 4D according to Embodiment 4, in addition to the opposing surface portions 81 and 82 provided in the above range, the opposing surface portion 80 has both ends of the irradiation unit 50 as shown by two-dot chain lines in FIG. 11 and FIG. You may comprise so that the additional opposing surface part 83 (84, 85) which exists also in the range which becomes an outer side from the part 50a, 50b may be included.

  In this modified example, the additional facing surface portion 83 (84, 85) has one end portion 52d on the light exit surface 52 of the irradiation unit 50 in the conveyance direction A of the continuous paper 9 as shown in FIGS. To a range beyond the other end 52e on the upstream side in the transport direction A. Further, the additional facing surface portion 83 (84, 85) has a width and a width that exists up to the same range as the facing surface portions 81, 82 in the width direction B of the continuous paper 9 as shown in FIG. It has a shape.

  According to the drying device 4D of this modified example, the air Ef and Eg blown out from the end portions 62Aa and 62Ab of the air outlet 62A as shown in FIG. 13 flows in the direction of the opposing surface portion 80 (81 and 82). The presence of the additional facing surface portion 83 (84, 85) is restricted until the irradiation portion 50 is exceeded, so that the continuous paper 9 passes through the direction away from the irradiation portion 50 outside the both end portions 9a, 9b. Is more reliably prevented. As a result, the air Ef, Eg flows through the vicinity of both ends 50a, 50b of the irradiation unit 50 and the outside thereof efficiently and reliably.

[Embodiment 5]
FIG. 14 shows a drying device 4E according to the fifth embodiment.
The drying device 4E according to the fifth embodiment has the same configuration as that of the drying device 4A according to the first embodiment, except that an absorption duct 71B having a part of the configuration that is different as the absorption duct of the absorption unit 70 is employed. It will be.

  As shown in FIG. 14, the absorption duct 71 </ b> B in the fifth embodiment has a suction port 72 </ b> B having a width W <b> 5 that is narrower than the width W <b> 2 in the width direction B of the irradiation unit 50. The width dimension W5 of the suction port 72B is smaller than the width dimension W1 of the continuous paper 9.

<Operation of drying device>
In the droplet discharge device 1 provided with the drying device 4E, as shown in FIG. 15, the entire area of the air outlet 62A of the supply duct 61 in the supply portion 60 of the drying device 4E (the inner portion 62Ac and the end portions 62Aa, 62Ab). Air) is blown out in a direction parallel to the continuous paper 9 toward the side where the irradiation unit 50 is located.
Thereby, especially the air blown out from the inner part 62Ac of the outlet 62A flows so as to pass between the irradiation part 50 and the continuous paper 9 in the entire width direction B.

  In the drying device 4E, as shown in FIG. 15, most of the air after passing between the irradiation unit 50 and the continuous paper 9 has an absorption width W5 that is narrower than the width W2 of the irradiation unit 50. It is absorbed so as to be collected in the suction port 72B of the duct 71B. In particular, the air Eh, Ej flowing in the vicinity of both end portions 50a, 50b of the irradiation unit 50 flows while being bent so as to be brought close to the suction port 72B of the absorption duct 71B having the narrow width dimension W5 by the suction force, and finally sucked. Absorbed through mouth 72B.

Accordingly, also in the drying device 4E, the air supplied from the supply unit 60 surely flows between the irradiation unit 50 and the continuous paper 9. Therefore, both end portions of the irradiation unit 50 at the portions facing the continuous paper 9 In the vicinity of 50a and 50b (including a part of the holding member 53), it is possible to prevent the staying water vapor from adhering to cause dew condensation.
In addition, in the drying device 4E, the absorption duct 71B in the absorption section 70 can be narrowed in the width direction B. As a result, the installation space and manufacturing cost of the absorption duct 71B can be reduced. Become.

[Other embodiments]
In the drying apparatuses 4 </ b> A to 4 </ b> E according to Embodiments 1 to 5, the supply unit 60 is disposed on the upstream side of the irradiation unit 50 in the conveyance direction A of the continuous paper 9, and the absorption unit 70 is conveyed from the irradiation unit 50 to the continuous paper 9. It is also possible to arrange in the direction A downstream side.
However, the air containing water vapor generated by evaporation of the water droplets 35 attached to the continuous paper 9 by the air supplied from the supply unit 60 is transported so as to be peeled off from the surface of the continuous paper 9 and then absorbed by the absorption unit 70. The effect of absorbing is more easily obtained in the arrangement configuration of the supply unit 60 and the absorption unit 70 in the drying apparatuses 4A to 4E.

  In the drying device 4B according to the second embodiment, the continuous paper 9 is supplied to the inner portion 62Bc in the outlet 62B of the supply duct 61 as in the inner portion 62Ac of the outlet 62A of the supply duct 61 in the first embodiment. You may change to the structure (refer FIG. 2 etc.) which blows off in the direction parallel to the direction.

In the drying device 4D according to the fourth embodiment, air is continuously supplied to the end portions 62Aa and 62Ab at the outlet 62A of the supply duct 61 as in the inner portion 62Bc of the outlet 62B of the supply duct 61 in the second embodiment. You may change into the structure (refer FIG. 6A) which blows off in the direction which cross | intersects the paper 9 diagonally.
Even when the above-described configuration is adopted for the end portions 62Aa and 62Ab in the air outlet 62A, air is blown from the changed end portions 62Aa and 62Ab in a direction obliquely intersecting the continuous paper 9 as in the inner portion 62Bc of the air outlet 62B. The air at this time leaves the outer sides of both end portions 9a and 9b of the continuous paper 9 away from the irradiation unit 50 due to the presence of the opposing surface portion 80 (81, 82) and the additional opposing surface portion 83 (84, 85). It is prevented from passing in the direction, and flows so as to pass through the vicinity of both ends 50a and 50b of the irradiation unit 50 or the outside thereof.

  In Embodiment 1-5, although the application example which dries with respect to the continuous paper 9 in the state conveyed in the horizontal direction was shown as drying apparatus 4A-4E, it is not limited to this, For example, drying The apparatuses 4A to 4E may be arranged and used so as to dry the continuous paper 9 that is conveyed in a vertical direction or a tilted direction.

  In the first to fifth embodiments, the ink jet recording apparatus is exemplified as the droplet discharge apparatus 1 provided with the drying apparatus 4 (A to E). However, the drying apparatus represented by the drying apparatus 4 (A to E). As a droplet discharge device provided with the above, if it is necessary to discharge droplets onto a medium such as continuous paper 9 and irradiate the medium with laser light to evaporate the moisture of the droplets and dry it, A liquid droplet ejection device of a type may be used.

1. Inkjet recording apparatus (an example of a droplet discharge apparatus)
4 (4A-4E) ... Drying device 9 ... Continuous paper (an example of a recording medium)
30: Droplet discharge unit 35 ... Ink droplet (an example of a water droplet)
40 ... Drying section 60 ... Supply section 62A, 62B ... Outlet 62Aa, 62Ba, 62Ab, 62Bb ... Outlet end 62Ac, 62Bc ... Outlet inner part 70 ... Absorbing section 80, 83 ... Opposing surface section A ... Conveying direction B ... Width direction E ... Air h1 ... Opening height h2 at the inner side of the blowout port ... Opening height at the end of the blowout port

Claims (8)

An irradiation unit that irradiates a recording medium conveyed in a predetermined conveyance direction with laser light to evaporate the moisture of droplets attached to the recording medium;
A supply unit for supplying air between the irradiation unit and the recording medium from one of the downstream side and the upstream side in the transport direction from the irradiation unit;
An absorber that absorbs at least a portion of the air flowing upstream or downstream in the transport direction along the recording medium at a position upstream or downstream in the transport direction from the irradiation unit;
With
The supply unit has an outlet that blows out the air having a width that is wider than a dimension in the width direction intersecting the transport direction of the irradiation unit, and is located outside both ends of the irradiation unit in the width direction. Drying equipment that exists up to the position.   The supply unit is provided such that an end portion outside the both ends of the irradiation unit out of the outlets blows out the air toward a side where the irradiation unit is present and in a direction parallel to the recording medium. The drying apparatus according to claim 1.   In the supply unit, an inner portion of the air outlet that exists along the width direction of the irradiation unit crosses the air obliquely between the irradiation unit and the recording medium and with respect to the recording medium. The drying apparatus according to claim 2, which is provided so as to blow out in a direction.   The opening height of the said edge part in the said blower outlet is comprised so that it may become a dimension smaller than the opening height of the inner part which exists along the said width direction of the said irradiation part among the said blower outlets. 4. The drying apparatus according to 3.   In the range of the outlet of the supply unit from the end portion outside the both ends of the irradiation unit to at least the irradiation unit, and at a position opposite to the supply unit across the recording medium The drying apparatus according to claim 1, wherein an opposing surface portion facing the recording medium is disposed.   The drying apparatus according to claim 5, wherein the facing surface portion is disposed so as to exist also in a range outside the both end portions of the irradiation unit.   The drying device according to any one of claims 1 to 6, wherein the absorption section has a suction port for sucking the air having a width that is narrower than the width of the irradiation section. A droplet discharge unit that discharges droplets onto a recording medium that is transported in a predetermined transport direction, and a position downstream of the droplet discharge unit in the transport direction, and irradiates the recording medium with laser light. And a drying unit that evaporates and dries the moisture of the droplets adhering to the recording medium,
The droplet discharge device configured by the drying device according to any one of claims 1 to 7, wherein the drying unit.

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