Recording auxiliary device, recording system, recording device, and printing method

Abstract

A recording auxiliary device (5) has an irradiator (9) and a heat dissipation mechanism (11). The irradiator (9) irradiates a recording medium (101) with ultraviolet rays. The heat dissipation mechanism (11) has a component (13) on the side opposite from the irradiator (9) with respect to the recording medium (101), and moves the component (13) so that a portion of the component (13) irradiated with ultraviolet rays leaking without being blocked by the recording medium (101) is changed.

Description

Recording Assistance Device, Recording System, Recording Device, and Printing Method

[0001] The present disclosure relates to a recording assistance device that irradiates a recording medium (e.g., paper with ink attached) with ultraviolet rays (hereinafter sometimes abbreviated as "UV"), a recording system and a recording device including the recording assistance device, and a printing method.

[0002] In a recording device that ejects a liquid (e.g., ink) toward a recording medium (e.g., paper) to perform recording (e.g., printing), a device including a UV irradiation device is known (e.g., Patent Document 1 below). In Patent Document 1, UV is used to raise the temperature of a polymer contained in the ink to melt the polymer. The polymer then solidifies and adheres to the recording medium.

[0003] International Publication No. 2022 / 004486

[0004] A recording assistance device according to an aspect of the present disclosure includes an irradiator and a heat dissipation mechanism. The irradiator irradiates a recording medium with ultraviolet rays. The heat dissipation mechanism has a component on the side opposite to the irradiator with respect to the recording medium, and moves the component so that a portion irradiated with the ultraviolet rays leaked without being blocked by the recording medium in the component is changed.

[0005] A recording system according to an aspect of the present disclosure includes the recording assistance device and a discharge device that discharges a liquid toward the recording medium.

[0006] A recording device according to an aspect of the present disclosure includes the recording system and a conveyance device that conveys the recording medium.

[0007] A printing method according to an aspect of the present disclosure includes ejection of ink toward a recording medium, irradiation of the recording medium with ultraviolet rays by an irradiator, and movement of a component located on the side opposite to the irradiator with respect to the recording medium so that a portion irradiated with the ultraviolet rays leaked without being blocked by the recording medium in the component is changed.

[0008] A schematic perspective view showing a recording device according to an embodiment. A schematic cross-sectional view along line II-II in Figure 1. A schematic cross-sectional view along line III-III in Figure 2. A schematic cross-sectional view showing part of another example of an irradiation unit.

[0009] In the following, for any of the multiple embodiments relating to various devices or components, those described later will generally only be described in terms of their differences from those described earlier. Unless otherwise specified, matters may be treated the same as those described earlier or inferred from those described earlier. Furthermore, for convenience, corresponding components in multiple embodiments may be given the same reference numerals even if there are differences.

[0010] The diagrams used in the following explanation are schematic. Therefore, for example, the dimensional ratios on the drawings do not necessarily match those of reality. Also, the dimensional ratios of the same component do not necessarily match between drawings. Certain shapes and / or dimensions may be exaggerated, or details may be omitted. However, the above does not negate the possibility of extracting characteristic shapes and / or dimensions from drawings.

[0011] Furthermore, in cross-sectional views, a single type of hatching may be applied to a component formed by combining two or more members. A component with a single type of hatching may be formed as a single unit or as a collection of multiple members, provided that no inconsistencies arise. Adjacent members that have different hatching or are marked with boundary lines can generally be considered as being formed separately. However, they may be formed as a single unit, provided that no inconsistencies arise.

[0012] For convenience, the drawings may be labeled with the Cartesian coordinate system D1, D2, and D3, and terms such as the D1 direction, D2 direction, and D3 direction may be used. The recording device or its components according to the embodiment may be used in any orientation. However, for convenience, unless otherwise specified, an example may be taken where the +D3 side is upward, and expressions based on this configuration (such as top surface and bottom surface) may be used.

[0013] (Overview of Embodiments) Figure 1 is a schematic perspective view of a printer 1 (an example of a recording device) according to an embodiment. The printer 1 is configured as an inkjet printer that prints on a medium 101 (an example of a recording medium) such as paper.

[0014] More specifically, in the illustrated example, the media 101 is a roll of paper and is transported in the direction indicated by the white arrow. Then, ink (an example of a liquid) is ejected from the ejection device 3 toward the front surface 101a of the media 101, and printing is performed. After that, the media 101 (more specifically, the printed area of ​​the media 101 in the illustrated example) is transported to the auxiliary device 5 (an example of a recording auxiliary device). The auxiliary device 5 assists, for example, in fixing the ink to the media 101 (for example, drying the ink). When the media 101 passes below the ejection device 3, its front surface 101a is facing upwards, and when it passes through the auxiliary device 5, its back surface 101b is facing upwards.

[0015] Depending on the configuration of the printer 1, as shown in the illustrated example, only a portion of the media 101, rather than the entire media 101, may pass below the ejection device 3 or inside the auxiliary device 5. However, as described above, where it was stated that the media 101 is transported to the auxiliary device 5, the description of the embodiment may use expressions that disregard strict accuracy.

[0016] Figure 2 is a cross-sectional view of the auxiliary device 5, corresponding to the line II-II in Figure 1. The auxiliary device 5 has, for example, an irradiator 9 that irradiates UV light toward the front surface 101a. The UV light contributes, for example, to raising the temperature of the ink and accelerating the drying of the ink.

[0017] Figure 3 is another cross-sectional view of the auxiliary device 5, corresponding to line III-III in Figure 2. In the example in Figure 3, the width (D2 direction) over which the irradiator 9 can irradiate UV is wider than the width of the media 101. This reduces the likelihood of a decrease in UV irradiance in areas such as the edges of the media 101.

[0018] On the other hand, UV light leaks upward from the sides of the media 101. As a result, UV light is irradiated onto a component located above the media 101, causing the temperature of that component to rise. This temperature rise can cause problems. Therefore, in this embodiment, a heat dissipation mechanism 11 is positioned above the media 101 (on the opposite side of the media 101 from the irradiator 9).

[0019] As shown in Figures 2 and 3, the heat dissipation mechanism 11 includes, for example, a belt 13 (an example of a component), a plurality of rollers 15 (two in the illustrated example) on which the belt 13 is stretched, and an electric motor 17 that rotates at least one of the plurality of rollers 15. The belt 13 is located on the opposite side of the media 101 from the irradiator 9, with a portion of it facing the media 101.

[0020] By positioning the belt 13 away from the media 101 and the irradiator 9, the media 101 is less likely to become contaminated than if it were transported in contact with the belt 13. Furthermore, the possibility of the media 101 being cut at the point of contact is reduced. Additionally, since the media 101 and the belt 13 are separated, there is no need to move the belt 13 and the media 101 at the same speed or to synchronize their operation and stopping, thus simplifying the control of the belt 13's operation. Note that even if the transport of the media 101 is stopped, the belt 13 may continue to operate as long as UV irradiation continues.

[0021] In the example shown in Figure 3, the width of the belt 13 is wider than the width over which the irradiator 9 emits UV light, allowing it to receive UV rays. As can be seen from Figure 2, the area of ​​the belt 13 that is irradiated with UV light is changed as the belt 13 is transported by the rollers 15 and the electric motor 17. In other words, the areas that are irradiated with UV light and the areas that are not are swapped.

[0022] Therefore, for example, after UV light is irradiated onto a predetermined part of the belt 13, the conveyance of the belt 13 changes the predetermined part to a part that is not irradiated with UV light, thereby allowing heat to dissipate. This reduces the temperature rise of the predetermined part compared to the case where UV light is continuously irradiated onto the predetermined part. From another perspective, for example, compared to a configuration in which a plate-shaped member is fixed above the media 101, the probability of the temperature of the UV-irradiated area rising can be reduced.

[0023] The auxiliary device 5 according to this embodiment does not necessarily have to achieve the above-described effects. Furthermore, features different from those described above may be extracted from this disclosure. In this case, for example, the irradiator 9 and / or heat dissipation mechanism 11 may not be provided.

[0024] The above is an overview of the printer 1 according to the embodiment. Below, we will provide a general explanation in the following order. 1. Printer 1 (Figure 1) 1.1. Printer 1 in general 1.2. Discharge device 3 1.3. Conveyor device 21 1.4. Controller 23 2. Media 101 and ink 3. Auxiliary device 5 (Figures 1 to 3) 3.1. Auxiliary device 5 in general 3.2. Units (7, 35, 37) in general 3.3. Hot air mechanism 27 3.4. Suction mechanism 29 4. Irradiation mechanism 6 (Figures 2 and 3) 4.1. Irradiation mechanism 6 in general 4.2. Irradiator 9 4.3. Heat dissipation mechanism 11 4.3.1. Heat dissipation mechanism 11 in general 4.3.2. Belt mechanism 4.3.3. Other examples of belt conveying paths (Figure 4) 4.4. Cooling device (Figure 2) 4.4.1. Cooling Systems in General 4.4.2. Air Cooling System (Blower 45) 4.4.3. Other Examples of Air Cooling Systems (Figure 4) 4.4.4. Water Cooling System (Figure 4) 4.5. Temperature Sensor 47 (Figure 2) 4.6. Insulation Material 51 (Figures 2 and 3) 4.7. Partition (Figure 4) 5. Summary of Embodiments

[0025] In describing the embodiments, the configurations shown in Figures 1 to 3 above will be used as examples. However, Figure 4 may be referred to as appropriate. Figure 4 is a cross-sectional view showing a part of another example of the irradiation unit 7 (unit having a heat dissipation mechanism 11) of the auxiliary device 5, and corresponds to a part of Figure 2. For convenience, the irradiation unit in Figure 4 may be denoted as 7A. The irradiation unit 7 may refer to the irradiation unit shown in Figures 1 to 3, or to the irradiation unit shown in the full figure.

[0026] (1. Printer) (1.1. Printer in general) The printer 1 shown in Figure 1 includes, for example, a recording system 19 that applies ink to a media 101, a transport device 21 that transports the media 101, and a controller 23 that controls these. The recording system 19 includes an ejection device 3 and an auxiliary device 5.

[0027] The configuration of printer 1, excluding the auxiliary device 5, can be varied, and may, for example, be a known configuration. Below, we will briefly describe the configuration in general, excluding the auxiliary device 5, using the illustrated configuration as an example.

[0028] (1.2. Dispensing device) The dispensing device 3 may perform color printing or monochrome printing. The dispensing device 3 has at least one head (not shown) that dispenses ink facing the front surface 101a of the media 101.

[0029] The ejection device 3 is configured for use in a so-called line printer. That is, the head (which may consist of multiple small heads arranged along a plane) extends over approximately the entire width (D2 direction) of the media 101. When the media 101 is transported continuously, printing is performed on a strip-shaped area extending in the D2 direction, thereby forming a two-dimensional image.

[0030] However, the ejection device 3 may be for a serial printer. In this case, for example, the operation of printing while moving the head in the D2 direction and the transport of the media 101 are performed alternately (the media 101 is transported intermittently). In describing the embodiments, a line printer may be used as an example for convenience without further explanation.

[0031] Although not specifically shown in the diagram, the head of the ejection device 3 ejects ink droplets from a nozzle facing the media 101, for example. The configuration of the head is arbitrary as long as it is capable of ejecting ink. For example, the actuator that applies pressure to the ink for ejection may be a piezoelectric type that applies pressure to the ink by deforming a piezoelectric element, or a thermal type that applies pressure to the ink by heating the ink and generating bubbles.

[0032] (1.3. Conveying device) The conveying device 21 has, for example, a plurality of rollers 25 that come into contact with the media 101. The media 101 passes between the irradiator 9 and the belt 13 with a constant tension applied by the plurality of rollers 25. This makes it possible to keep the irradiator 9 and the belt 13, etc., away from the media 101.

[0033] Alternatively, a sliding member may be provided on the media 101 instead of the roller 25. Furthermore, the media 101 may be conveyed by a method other than the position facing the belt 13. Other methods include, for example, conveying a belt (separate from the belt 13) that holds the media 101, or rotating a drum around which the media 101 is wound.

[0034] The configuration of the transport path for the media 101 is arbitrary. For example, the transport path may extend in a U-turn (as in the example in Figure 1), or it may extend in a generally straight line (including a gentle curve that does not result in a U-turn in part or in whole). From another perspective, assuming a configuration in which the ejection device 3 ejects ink from top to bottom, the front surface 101a (the side to be printed on) of the media 101 may be facing downwards (as in the illustrated example) or upwards when passing through the auxiliary device 5.

[0035] As can be understood from the above explanation, in the description of auxiliary device 5, the terms "upper" and "lower" may be substituted for each other unless otherwise specified, and as long as no contradictions arise.

[0036] (1.4. Controller) The controller 23 is composed of, for example, a CPU (central processing unit), ROM (read-only memory), RAM (random access memory), and an external storage device, although these are not specifically shown in the diagram. In other words, the controller 23 is composed of, for example, a computer. Various control units that perform various controls are constructed by the CPU executing programs stored in the ROM and / or external storage device. The controller 23 may also include logic circuits that perform only certain operations, or it may be conceptualized to include drivers that supply power to various elements.

[0037] The controller 23 may be appropriately distributed in hardware. For example, the controller 23 may be configured to include lower-level controllers provided in each of the dispensing device 3, auxiliary device 5, and transport device 21, and a higher-level controller that controls (for example, synchronizes) a plurality of lower-level controllers by sending and receiving signals between them.

[0038] As can be understood from the above, the controller 23 shown in Figure 1 does not represent a single hardware component, but rather, for convenience, can be considered as a conceptual representation of the entire control configuration for the printer 1. Furthermore, when focusing on each device (for example, auxiliary device 5), all or part of the controller 23 can be considered as the controller included in that device.

[0039] (2. Media and Ink) The shape of the media 101 is, for example, in the form of a roll of paper. However, the media 101 may be in the form of a single sheet of paper. Also, the size of the media 101 (from another perspective, the size of the printer 1) is arbitrary. For example, the size of the media 101 may be as small as a receipt, may be the size commonly used in offices, or may be as large as a poster.

[0040] The material of the media 101 is arbitrary. For example, the media 101 may be made of paper, resin (e.g., resin film), metal (e.g., metal film), cloth, wood, or ceramic (e.g., ceramic film). Also, the media 101 may be one that does not allow UV to pass through at all or almost at all, or may be one with a relatively high UV transmittance. In the description of the embodiments, for the sake of convenience, and without particular notice, there may be a premise that the media 101 is paper (a mode with an extremely low UV transmittance).

[0041] The ink, for example, contains a medium (solvent or dispersion medium. For example, water or an organic solvent) and a colorant (pigment or dye). And the printer 1 fixes the colorant to the media 101 along with the drying of the ink (evaporation of the medium). In other words, the ink is not a UV-curable ink. However, the auxiliary device 5 (irradiator 9) is also applicable to printers that use UV-curable ink. When the medium is an aqueous solvent, the solvent may contain, for example, 60% by mass or more, or 90% by mass or more (it may be 100% by mass) of water.

[0042] The specific mode of fixing the colorant to the media 101 is arbitrary. For example, the fixing may be due to the penetration of the colorant into the media 101, may be due to the deposition of the colorant on the media 101 accompanying the drying of the medium, may be due to a predetermined polymer melting and solidifying and fixing to the media 101 together with the colorant, or may be a combination of these.

[0043] In addition to the colorant, the ink may contain a component that absorbs UV and generates heat. Such a component may be a UV absorber (ultraviolet absorber). The UV absorber may be dispersed in a medium (e.g., an aqueous solvent). Here, the UV absorber not only simply absorbs UV and generates heat, but can repeat this process. A component (transparent) that imparts gloss to the medium 101 may also be regarded as a type of colorant.

[0044] (3. Auxiliary Device) (3.1. General Auxiliary Device) The auxiliary device 5 shown in FIG. 2 has, for example, an irradiation mechanism 6 including an irradiation unit 7. The irradiation unit 7 has, for example, the aforementioned irradiator 9 and heat dissipation mechanism 11. In addition to the irradiation mechanism 6, the auxiliary device 5 may (or may not) include one or more components (mechanisms) that contribute to the promotion (e.g., drying) of ink fixation.

[0045] In the example of FIG. 2, in addition to the irradiation mechanism 6, the auxiliary device 5 has a hot air mechanism 27 and a suction mechanism 29. The hot air mechanism 27 supplies hot air around the medium 101, thereby promoting the drying of the ink. The suction mechanism 29 sucks gas (e.g., air) from around the medium 101, and thus, for example, removes moisture from around the medium 101 to promote the drying of the ink. Examples of other components, although not particularly shown in the figure, include an irradiator that irradiates the medium 101 with infrared rays and a roller that contacts the medium 101 and heats the medium 101.

[0046] From another perspective, the auxiliary device 5 has, for example, a device body 33 having a conveyance space 31 (an example of a first space) through which the medium 101 passes, and one or more external devices (e.g., a blower 39 described later) arranged away from the device body 33. From another perspective, the device body 33 directly undertakes the process of promoting the fixation of the ink to the medium 101. The one or more external devices supply power, supply hot air, and / or suck gas to the device body 33.

[0047] The main body of the apparatus 33 has one or more units (three in the illustrated example). Each unit is a part of the mechanism that promotes the fixation of ink to the media 101, and is located in the main body of the apparatus 33, and acts directly on the media 101. In the example of Figures 1 and 2, the main body of the apparatus 33 has an irradiation unit 7 of the irradiation mechanism 6, a hot air unit 35 of the hot air mechanism 27, and a suction unit 37 of the suction mechanism 29.

[0048] Contrary to the description of the embodiment, the main unit 33 of the device may be configured so that no external equipment is required. Also, regardless of whether or not external equipment is present, the main unit 33 alone, rather than the auxiliary device 5, may be considered as an example of a recording auxiliary device.

[0049] The shape and dimensions of the transport space 31 are arbitrary. In the illustrated example, it extends linearly with a constant width (in the D2 direction) and height (in the D3 direction) (it is a thin rectangular parallelepiped). As can be understood from the description of the size of the media 101, the specific values ​​of the width and height of the transport space 31 with the shape described above are also arbitrary.

[0050] The temperature of the ink and / or media 101 achieved by the auxiliary device 5 is arbitrary. In other words, the UV intensity (irradiance), the distance to which the UV is irradiated (direction D1, or time from another perspective), the temperature of the hot air, the amount of hot air supplied (airflow rate), the amount of gas drawn in, etc., are also arbitrary. For example, the temperature of the ink and / or media 101 may be raised to 100°C or higher by the auxiliary device 5.

[0051] (3.2. General Units) Each unit (7, 35, 37) surrounds the transport path of the media 101 from all four sides (top, bottom, left, and right). In other words, each unit constitutes a transport space (not shown) through which the media 101 passes. The transport space 31 is formed by the connection of the transport spaces of multiple units (generally without gaps). The transport space 31 is sealed except for the entrance and exit.

[0052] Furthermore, when referring to "sealed," unless otherwise specified, and unless contradictions arise, it is acceptable for minute gaps to exist without specifying "substantial," etc. These minute gaps are, for example, gaps that are practically negligible from the standpoint of airflow related to the drying of the media 101. Unlike the illustrated example, the transport space 31 may be composed of a unit positioned above and a unit positioned below. Also, the transport space 31 does not have to be sealed.

[0053] Each unit has, for example, a housing (only the housing 49 of the irradiation unit 7 is given a reference numeral; an example of a passage member). Each unit (or housing in another view) also has, for example, four plates (only some plates 49a and 49b are given reference numerals) that surround the transport space 31 from above, below, left, and right. Even though it is expressed as four plates, the number of members that make up these four plates may be four, less than four, or five or more.

[0054] The material, shape, and dimensions of the enclosure (and plates) are arbitrary. In the illustrated example, each enclosure is roughly rectangular. One or more of the four plates (for example, the upper and / or lower plates) may be adjustable in position relative to the outer shape of the enclosure in the direction of their normality. In Figures 2 and 3, the plates are shown as relatively thick for illustrative purposes, but they may be thinner than the illustrated example (or conversely, thicker than the illustrated example). The plates may also contain (or do not contain) thermal insulation material 51.

[0055] Multiple units may be fixed in relative positions to one another as appropriate. For example, although not specifically shown in the figures, multiple units may be housed together in a housing, fixed to a common frame, and / or fixed to adjacent units. The main body of the device 33 may or may not be customizable by the user of the printer 1 by changing the number, type, and arrangement of units.

[0056] (3.3. Hot Air Mechanism) As previously described, the hot air mechanism 27 has a hot air unit 35. In addition, as shown in Figure 2, the hot air mechanism 27 has a blower 39 and a heater 41.

[0057] The hot air unit 35 has, for example, at least an outlet (not shown) for blowing out hot air. Its specific configuration is arbitrary. In the illustrated example, the outlets are opened in the upper and lower plates (the surfaces facing the front surface 101a and the back surface 101b) of the four plates (described above) surrounding the transport space 31.

[0058] The hot air supplied to the housing of the hot air unit 35 passes through the housing and is supplied to the conveying space 31 from the outlet. A flow path of an appropriate shape may be configured inside the housing. The outlet is, for example, a slit shape extending in the D2 direction across the width of the media 101. The specific number, shape, and dimensions of the outlet are arbitrary.

[0059] In the illustrated example, the outlets are provided on both the front surface 101a and the back surface 101b of the media 101. Unlike the illustrated example, the outlets may be provided on only one of them. Also, hot air may be supplied to one of the front surface 101a and the back surface 101b, while suction is performed on the other. Two or more hot air units 35 may be provided, in which case the number and position of the outlets may differ from each other.

[0060] In the examples shown in Figures 1 and 2, the hot air unit 35 is located upstream of the irradiation unit 7 in the media 101 transport direction. Unlike the illustrated examples, the hot air unit 35 may be located downstream, or both upstream and downstream. The number of hot air units 35 on the upstream or downstream side is also arbitrary.

[0061] The blower 39 includes, for example, a fan and a motor (not shown). The heater 41 is located, for example, upstream or downstream of the blower 39 and includes a resistor that generates heat when power is supplied to it.

[0062] In the example shown in Figure 2, the blower 39 and heater 41 are located outside the hot air unit 35 (as described above as external equipment). The blower 39 and the hot air unit 35 are connected by a flow path (not shown). The heater 41 is located inside or near the flow path. The hot air unit 35 simply has a flow path for supplying hot air to the conveying space 31. Unlike the illustrated example, the blower 39 and / or heater 41 may be located inside the hot air unit 35.

[0063] In the example shown in Figure 2, a blower 39 and a heater 41 are provided for each of the upper and lower outlets. Unlike the illustrated example, the blower 39 and / or heater 41 may be provided in common for both the upper and lower outlets. Alternatively, the blower 39 and / or heater 41 may be shared by two or more hot air units 35.

[0064] Although not specifically shown in the diagram, the hot air mechanism 27 may utilize the waste heat from the irradiation unit 7. The hot air mechanism 27 may also perform a predetermined treatment on the gas drawn in by the suction mechanism 29 (for example, a gas at a temperature higher than room temperature) and then discharge it. The gas discharged by the hot air mechanism 27 may be air, or it may be a gas other than air.

[0065] The temperature of the gas supplied to the transport space 31 by the hot air mechanism 27 is, for example, at least room temperature (e.g., 20°C) and / or higher than the temperature of the air surrounding the printer 1. In this disclosure, there is no particular distinction between hot air and warm air. The specific temperature of the hot air is arbitrary, as already mentioned. For example, the temperature of the hot air at the outlet may be around 130°C if the media 101 is paper, and 80°C to 90°C if the media 101 is a resin film.

[0066] (3.4. Suction Mechanism) As previously described, the suction mechanism 29 has a suction unit 37. The suction mechanism 29 also has a suction machine 43, as shown in Figure 2.

[0067] The suction unit 37 has, for example, at least a suction port (not shown) for drawing in gas. The configuration of the suction unit 37 may be the same as or similar to that of the hot air unit 35. The description of the hot air unit 35 may be applied to the suction unit 37 by replacing the term "outlet" with the term "suction port," for example.

[0068] In the examples shown in Figures 1 and 2, the suction unit 37 is located downstream of the irradiation unit 7 in the direction of transport of the media 101. Unlike the illustrated examples, the suction unit 37 may be located upstream, or both upstream and downstream. The number of suction units 37 on the upstream or downstream side is also arbitrary.

[0069] From another perspective, in the illustrated example, the hot air unit 35 and the suction unit 37 are located on opposite sides of the irradiation unit 7 in the media 101 transport direction. Unlike the illustrated example, one or more hot air units 35 and one or more suction units 37 may be located on the same side, either partially or entirely.

[0070] The suction device 43 includes, for example, a fan and a motor (not shown). The description of the blower 39 and the hot air unit 35 (for example, whether they are external devices, whether they are shared by two or more units, etc.) may be applied to the suction device 43 and the suction unit 37, provided that no inconsistencies arise.

[0071] (4. Irradiation Mechanism) (4.1. Irradiation Mechanism in General) The UV from the irradiation mechanism 6 contributes to raising the temperature of the ink by being absorbed by the ink, for example. Therefore, the irradiator 9 is positioned on the front surface 101a side. In other words, the heat dissipation mechanism 11 is positioned on the back surface 101b side. However, if the material of the media 101 is a material that transmits UV light, the irradiator 9 and the heat dissipation mechanism 11 may be positioned in the opposite direction to the illustrated example. Also, regardless of the material of the media 101, the irradiator 9 may be positioned on the back surface 101b side to allow the media 101 to absorb the UV light. In describing the embodiment, we will take as an example the case in which the irradiator 9 is located on the front surface 101a side.

[0072] The irradiation mechanism 6 includes, for example, an irradiation unit 7 and a power supply device (not shown) as an external device that supplies power to the irradiation unit 7. However, as previously described, the external device may be included in the irradiation unit 7. Furthermore, the division of roles between the irradiator 9 and the power supply device is arbitrary. For example, in an embodiment in which the auxiliary device 5 is configured to allow adjustment of UV intensity, power control according to the target value of UV intensity may be performed by either the irradiator 9 or the power supply device.

[0073] The dimensions of each part of the irradiation unit 7 are arbitrary. Examples are given below. The height of the transport space 31 (size in the D3 direction) is, for example, 5 mm to 20 mm. The width of the transport space 31 is, for example, 200 mm to 800 mm. The media 101 is, for example, located in the center of the height of the transport space 31. The length of the portion of the transport space 31 of the device body 33 that is composed of the irradiation unit 7 (the transport space of the irradiation unit 7) is, for example, 350 mm to 1500 mm. The width of the aperture (exit aperture) that emits UV in the irradiator 9 (and / or the width of the UV; the same applies hereafter in this paragraph) is, for example, 70 mm to 300 mm, assuming that it is narrower than the width of the transport space 31. The length (D1 direction) of the above-mentioned exit aperture is, for example, 30 mm to 200 mm. In the above-mentioned exit aperture, the width may be, for example, larger than the length.

[0074] As previously described, the irradiation unit 7 includes an irradiator 9, a heat dissipation mechanism 11, and a housing 49 that houses them. The irradiation unit 7 may have other appropriate components (or may not have them). For example, the irradiation unit 7 (or irradiation mechanism 6) may have a cooling device to promote heat dissipation by the heat dissipation mechanism 11. In Figure 2, a blower 45 is shown as an example of a cooling device. The irradiation mechanism 6 may also have a temperature sensor 47. These components will be described in order below.

[0075] (4.2. Irradiator) The irradiator 9 irradiates UV light over the entire width (D2 direction) of the media 101, for example. However, the structure and / or control of the irradiator 9 may be set to irradiate UV light over only a portion of the media 101 in the width direction. Such an irradiator 9 is also effective when printing is intended to be performed only on a portion of the media 101 in the width direction.

[0076] The irradiator 9 irradiates UV light generally uniformly across the width of the media 101. However, upon closer examination, UV light may be emitted in a way that it spreads (scatters) laterally, for example, towards the media 101. In such cases, as described above, by irradiating UV light over a width greater than the width of the media 101 with the irradiator 9, the likelihood of a decrease in UV irradiance at the widthwise edges of the media 101 can be reduced.

[0077] In media 101, the shape of the area irradiated with UV light (irradiation area) is, for example, a rectangle with sides parallel to the D1 and D2 directions. The specific size and aspect ratio of the irradiation area are arbitrary. Also, the configuration shown as a single irradiator 9 in the figure may be configured by arranging multiple irradiators (for example, in the D1 direction). In this case, the irradiation area may be a single area or may be divided into multiple areas.

[0078] The specific configuration of the irradiator 9 is arbitrary. For example, although not shown in the figures, the irradiator 9 has at least a light source (not shown) that generates UV. In addition, the irradiator 9 may have a reflector that reflects UV that leaks from the light source to the side away from the media 101, an aperture that adjusts the shape of the cross-section of the UV from the light source, and / or a lens that focuses the UV. The light source may be composed of an appropriate element such as an LED (light-emitting diode), an incandescent bulb, a fluorescent lamp, or a mercury lamp. The light source may be controlled by the controller 23.

[0079] As previously described, the irradiation unit 7 has plates that constitute the transport space 31. The lower plate 49b has a UV window 49bw that exposes the irradiator 9 to the transport space 31. In Figures 2 and 3, the irradiator 9 is located below the UV window 49bw. However, the upper end of the irradiator 9 may be fitted into the UV window 49bw. The configuration shown as a single UV window 49bw in the figures may schematically represent a configuration in which multiple UV windows are arranged (for example, in the D1 direction).

[0080] The shape and dimensions of the UV window 49bw may or may not define the irradiation area. The UV window 49bw is blocked, for example, by a light-transmitting member (which may or may not be provided) and / or an irradiator 9, and the entry of gas from the UV window 49bw into the housing 49 is substantially prohibited (the lower part of the housing 49 is sealed). In the figure, the lower surface of the transport space 31 is recessed at the position of the UV window 49bw. However, the recess may be eliminated by positioning the light-transmitting member or the irradiator 9 at the UV window 49bw. Also, as previously described, the plate 49b may be relatively thin, and consequently, the recess may be shallow.

[0081] The plate 49b may have a mirrored surface in the area surrounding the UV window 49bw. The mirrored surface contributes to increasing the efficiency of UV irradiation to the ink by, for example, reflecting the UV reflected by the media 101 back towards the media 101.

[0082] As is well known, UV light is light with a shorter wavelength than visible light. The specific wavelength of UV light emitted by the irradiator 9 is arbitrary. UV light may have a narrow wavelength range in which its energy is distributed, like laser light, or it may have a wide wavelength range.

[0083] The UV irradiance (intensity) is also arbitrary. For example, the UV irradiance (for example, the irradiance at the location of media 101; the same applies hereinafter) is 1000 mW / cm². ２ Above, 5000mW / cm ２ Above, 10000mW / cm ２The above may be used. With such illuminance, the ink temperature can be raised in a relatively short time. Also, for example, the illuminance may be set so that the ink can be raised to its boiling point (e.g., 100°C) with irradiation for about 0.3 seconds. Also, for example, the UV illuminance may be 4000 mW / cm². ２ The following may also be used. In this case, for example, the likelihood of increased heat generation when converting electricity to UV can be reduced.

[0084] The length of the irradiator 9 in the direction of transport of the media 101 (D1 direction) (and / or the length of the UV in the D1 direction at the position of the media 101; the same applies hereinafter) is also arbitrary. For example, the length of the irradiator 9 in the D1 direction may be 3 cm or more, 4 cm or more, or 5 cm or more.

[0085] The length of the irradiator 9 in the D1 direction, as used here, is the length of the part that directly contributes to the irradiation length in the D1 direction, and can be said to be the length of the light-emitting part, for example, rather than the length of the outer dimensions of the housing. For example, if UV is emitted directly onto the media 101 from a surface light source, the length of the surface light source may be considered the length of the light-emitting part. If an optical system including a lens is arranged in front of the light source (on the media 101 side), the length of that optical system may be considered the length of the light-emitting part. If there is an aperture (exit aperture) that defines the cross-sectional area of ​​UV in front of the light source, the length of that aperture may be considered the length of the light-emitting part. If the configuration depicted as a single irradiator 9 in Figures 2 and 3 is actually composed of multiple irradiators discretely arranged in the D1 direction, the total length (or conversely, the length excluding the gaps between irradiators) may be considered the length of the irradiator 9.

[0086] (4.3. Heat Dissipation Mechanism) (4.3.1. General Information on Heat Dissipation Mechanisms) As previously described, the heat dissipation mechanism 11 in the illustrated example is a belt mechanism having a belt 13. The heat dissipation mechanism 11 changes the area of ​​the belt 13 that is irradiated with UV light by conveying the belt 13, thereby reducing the temperature rise caused by leaked UV light. This principle can also be realized by mechanisms other than belt mechanisms. Examples are given below, although they are not specifically illustrated. - A disc (an example of a component) is placed facing the media 101. The radius of the disc is greater than the width of the media 101, and only a portion of the area on the outer periphery side from the center faces the media 101. The area of ​​UV light is changed by rotating the disc around a center line parallel to the D3 direction. - A cylinder (an example of a component) is placed with its outer surface facing the media 101. Only a portion of the outer surface located below faces the media 101. The area irradiated with UV light is changed by rotating the cylinder around an axis parallel to the D1 or D2 direction. • Prepare multiple flat plates (multiple flat plates together constitute one component). By moving the flat plates (e.g., sliding), the flat plate facing the media 101 is replaced. This changes the area (flat plate) irradiated with UV light.

[0087] In describing the embodiments, for convenience, a heat dissipation mechanism 11 composed of a belt mechanism will be used as an example. However, the description of the heat dissipation mechanism 11 may be applied to other types of heat dissipation mechanisms, as long as no inconsistencies arise. In this case, for example, the term "belt 13" may be replaced with the term "component".

[0088] In the description of the embodiment, it was stated that the heat dissipation mechanism 11 contributes to receiving UV light that leaks from the side of the media 101 (outward in the D2 direction) to the opposite side of the irradiator 9 (+D3 side). On the other hand, as already mentioned, the media 101 may be UV-transmitting. Also, the width of the UV irradiation area may be narrower than the width of the media 101. As can be understood from this, the heat dissipation mechanism 11 may be used to receive UV light directed directly above the media 101 (+D3 side), in addition to or instead of UV light leaking from the side. In other words, the belt 13 does not need to have an area larger than the width of the media 101 (and, if necessary, the length in the case of a single sheet) facing the media 101.

[0089] Furthermore, in addition to directly receiving UV radiation emitted from the irradiator 9, the heat dissipation mechanism 11 may also contribute to receiving UV radiation reflected by the inner surface of the media 101 and / or the transport space 31. Therefore, the heat dissipation mechanism 11 may be provided, for example, above the media 101, or alternatively, to the side of the media 101 (the belt 13 may face the media 101 from the side). The heat dissipation mechanism 11 may also be provided on the side (below) the irradiator 9.

[0090] (4.3.2. Belt Mechanism) In the heat dissipation mechanism 11 (belt mechanism) illustrated in Figures 2 and 3, the direction of movement of the UV-irradiated region (irradiation region) of the belt 13 is, for example, the same as the transport direction of the media 101. Unlike the illustrated example, the direction of movement of the irradiation region may be opposite to the transport direction of the media 101, or it may be in a direction intersecting the transport direction of the media 101 (D2 direction). However, in the description of the embodiment, for convenience, the orientation of the illustrated example may be assumed without further explanation.

[0091] Of the belt 13, the region facing the media 101 (or, from another perspective, the irradiator 9) (the facing region) is wider than, for example, the region where UV light is irradiated at the position of the belt 13 (excluding the region where unintended scattered light is irradiated) (the latter region is contained within the former region). Furthermore, the facing region is wider than, for example, the UV window 49bw or an unillustrated opening on the media 101 side of the irradiator 9 when viewed in the direction of UV irradiation (when viewed through in the direction of irradiation, the latter is contained within the former). Also, for example, the width of the belt 13 is wider than the width of the media 101. However, as can be understood from the above explanation, it is not necessarily required to be as described above.

[0092] As described above, when the opposing region of the belt 13 that faces the media 101 is larger than various other regions, the difference between the former and the latter is arbitrary. Furthermore, the opposing region referred to above may be, for example, a part intended to be planar. For example, in the illustrated example, the opposing region may be the part between the lowest points of the two rollers 15. The opposing region may be subjected to tension not only by its own weight but also appropriately by the driving force (and / or braking force) of the rollers 15.

[0093] The conveying path of the belt 13 is arbitrary, as long as a portion of it (the opposing region) faces the media 101 (irradiator 9). From another perspective, the number and arrangement (and diameter, etc.) of the rollers 15 over which the belt 13 is carried are arbitrary. Figures 2 and 3 illustrate the simplest conveying path for the belt 13. More specifically, in the illustrated example, two rollers 15 are provided, arranged along the conveying direction of the media 101 and spaced apart from each other. The belt 13 is then carried over these two rollers 15.

[0094] The structure and materials of the belt 13 are arbitrary. For example, the belt 13 may be a flexible component formed as a single unit, or it may be a component constructed by connecting multiple rigid bodies so that they can move relative to each other. The material of the belt 13 may be, for example, paper, resin, rubber, ceramic, or cloth. Flame retardants may be mixed into the various materials. The belt 13 may be a toothed belt that does not slip with the roller 15, or a flat belt that may slip. The belt 13 does not have holes in the area that is irradiated with UV light. However, holes (or alternative uneven shapes, etc.) may be formed to improve heat dissipation when not irradiated with UV light. If the thermal conductivity of the belt 13 is high, the possibility of the temperature of the UV-irradiated area of ​​the belt 13 rising and causing damage can be reduced. Also, heat spreads from the UV-irradiated area along the belt 13, and the heat that has spread to the belt 13 is dissipated, thus improving the heat dissipation of the belt 13. The thermal sheet resistance of the belt 13 is 50,000 m ２ - Below kW, and further 5000m ２ ・Below kW, especially 500m ２ - It may be set to kW or less.

[0095] The belt 13 may have low reflectivity or high reflectivity. In the former case, the likelihood of unintended temperature increases due to UV reflected by the belt 13 is reduced. In the latter case, it is expected that the temperature of the media 101 will rise due to UV reflected by the belt 13, thereby accelerating the drying of the ink. In the former case, the reflectivity of the belt 13 (at least the surface irradiated with UV) may be, for example, 30% or less, 20% or less, or 10% or less. Such reflectivity may be achieved, for example, by using a black material for all or part of the belt 13 (the surface irradiated with UV).

[0096] The mode of transport speed of belt 13 is arbitrary. For example, belt 13 may be transported continuously or intermittently. In the former and latter modes, the transport speed of belt 13 may be constant or may be changed according to conditions such as temperature. In intermittent transport, the travel distance, travel time, and stopping time may be constant or may be changed according to conditions such as temperature. For example, belt 13 may be transported continuously at a constant speed. In this case, for example, the effect of the heat dissipation mechanism 11 on the transport space 31 becomes constant, and the image quality becomes stable.

[0097] Furthermore, in any of the above embodiments, the conveying speed of the belt 13 may be slower, the same as, or faster than, for example, the conveying speed of the media 101. The conveying speed of the belt 13 may be set from the viewpoint of the temperature rise of the belt 13 due to UV, etc. (or, from another viewpoint, heat dissipation), and / or from the viewpoint of the effect of the movement of the belt 13 on the airflow in the conveying space 31. Regarding the former viewpoint, for example, the time that the part located below the belt 13 is exposed to UV, and / or the effect of air cooling due to the movement of the part located above the belt 13 may be considered.

[0098] As previously mentioned, the number, arrangement, and diameter of the rollers 15 are arbitrary. The structure and material of the rollers 15 are also arbitrary. For example, the rollers 15 may be made of a material with high thermal conductivity, or a material with low thermal conductivity, or they may have a double-layered structure with different thermal conductivity on the inside and outside. The configurations (structure, material, and diameter, etc.) of the multiple rollers 15 may be the same as shown in the illustration, or they may be different from each other.

[0099] The electric motor 17 is, for example, a rotary motor that transmits its rotation to the rollers 15. There may be one or more electric motors 17. The number of rollers 15 driven among the multiple rollers 15 may be one, multiple, a part of the total, or all of them. The number of rollers 15 driven by one electric motor 17 may be one or multiple. Which of the multiple rollers 15 is driven is also arbitrary. The placement of the electric motor 17 and the manner in which the electric motor 17 and the rollers 15 are connected (for example, whether or not a gear mechanism is involved) are also arbitrary. Unlike the illustrated example, the electric motor 17 may be located outside the housing 49. The electric motor 17 may be controlled by a controller 23.

[0100] Contrary to the above description, the drive source for the roller 15 may be a pneumatic or hydraulic (e.g., hydraulic) motor. Alternatively, the airflow generated by the blower 45 may be used to move the belt 13 instead of, or in addition to, the drive source such as the electric motor 17. For example, although not specifically shown, air may be blown onto the belt 13, the blades fixed to the belt 13, and / or the blades fixed to the roller 15.

[0101] The plate 49a of the housing 49 separates the transport space 31 from the storage space 32 above it (an example of a second space). The storage space 32 houses at least a part (for example, most or all) of the heat dissipation mechanism 11. The plate 49a has an opening 49aw. The lower part of the belt 13 is exposed to the transport space 31 through the opening 49aw. The heat dissipation mechanism 11 changes the portion of the belt 13 that is exposed to the transport space 31 through the opening 49aw by transporting the belt 13. This changes the portion of the belt 13 that is irradiated with UV light.

[0102] The lower portion of the belt 13 (for example, the opposing region which is intended to be at least planar) is located within the opening 49aw. The surface of the belt 13 that is irradiated with UV light (the lower surface of the opposing region) is flush with the lower surface of the plate 49a. In other words, the height of the transport space 31 is the same in the region where the belt 13 receives UV light and in the region where the opening 49aw of the plate 49a is not located.

[0103] Minor differences in the flushness described above may be ignored. Minor differences are, for example, differences that do not substantially affect the probability of contact between the media 101 and the upper surface of the conveying space 31, and / or the airflow in the conveying space 31. For example, the minor difference may be 1 / 5 or 1 / 10 of the height of the conveying space 31, or, for example, 2 mm or 1 mm or less. If the opposing region of the belt 13 is deflected, for example, its average value may be used as the point of comparison.

[0104] A gap (not shown; a gap extending in the D2 direction shown in Figure 2, and a gap extending in the D1 direction shown in Figure 3) is provided between the heat dissipation mechanism 11 (e.g., belt 13) and the opening 49aw to prevent the belt 13 from sliding against the opening 49aw. The width of this gap is arbitrary and may be relatively small, for example. For example, the width of this gap may be 2 mm or less or 1 mm or less, and / or 1 / 5 or 1 / 10 of the height of the transport space 31. Unlike the illustrated example, a thin plate (e.g., one with relatively low rigidity) may be fixed to the plate 49a and slid against the belt 13 to close the gap.

[0105] Although not specifically shown in the diagram, the opening 49aw may be closed (sealed) with a light-transmitting member that allows UV light to pass through. The light-transmitting member may be rigid or flexible. The lower surface of the light-transmitting member may be flush with the lower surface of the plate 49a.

[0106] The material of the light-transmitting member may be the same as the light-transmitting material used to cover the semiconductor in a UV-emitting LED, and the light-transmitting material used for the cover that closes the opening on the front of the irradiator 9. The light-transmitting material may be, for example, glass (e.g., silica glass, sapphire glass, or borosilicate glass) or resin (e.g., acrylic resin, polycarbonate resin, or epoxy resin). These materials may also be used for UV blocking depending on their specific composition and / or components and combination with other materials. The UV transmittance of the light-transmitting member (e.g., transmittance at the peak wavelength of UV irradiated by the irradiator 9) may be, for example, 50% or more, 80% or more, or 90% or more.

[0107] (4.3.3. Other Examples of Belt Conveyor Paths) As previously described, the conveyor path of the belt 13 is arbitrary. In the example in Figure 4, the belt 13 extends in a meandering manner in the portion that is not irradiated with UV light (the unirradiated portion; from another perspective, the portion above plate 49a). This increases the proportion of the length of the unirradiated portion in the total length of the belt 13. As a result, the heat dissipation of the belt 13 is improved.

[0108] When the non-irradiated portion of the belt 13 is said to meander, the non-irradiated portion extends at least to one side in a predetermined direction, then to the other side, and then back to the same side (making at least one and a half round trips in the predetermined direction). Furthermore, considering that the non-irradiated portion extends from below (one end of the irradiated portion where UV is irradiated) and returns to below (the other end of the irradiated portion), it may extend in two or more round trips. Two or more round trips of meandering may be achieved by five or more rollers 15, including, for example, the two rollers 15 on which the irradiated portion is stretched.

[0109] The predetermined direction in the meandering is arbitrary; for example, it may be in the D3 direction (as in the example in Figure 4), the D1 direction, or a direction that is inclined toward both. Furthermore, the forward and return paths may be parallel (most of the example in Figure 4), or they may be inclined toward each other so that they are closer together (so that the density of the belt 13 in the direction of travel is higher) (see the central part of the example in Figure 4), or conversely, they may be inclined toward each other so that they are further apart.

[0110] Although not specifically shown in the figures, the conveying path of the belt 13 may have a shape between the simplest example in Figure 2 and the example in which the non-irradiated portion meanders. For example, the conveying path of the belt 13 (including the irradiated portion) may be an n-sided polygon realized by (at least) n rollers 15. For example, the conveying path may be triangular or quadrilateral. Furthermore, a polygon with n = 4 or more sides may be a convex polygon or a non-convex polygon.

[0111] If multiple irradiators 9 are arranged in the transport direction, a belt 13 may be placed at the respective irradiation section of each irradiator 9. The belt 13 may be exposed to the transport space 31 across multiple irradiators 9 arranged in the transport direction. Doing so simplifies the structure of the heat dissipation mechanism 11 and makes it less prone to malfunctions. The belt 13 may be exposed to the transport space 31 so as to face each of the multiple irradiators 9 arranged in the transport direction individually. That is, there may be places between multiple irradiators 9 lined up in the transport direction where the belt 13 is not exposed to the transport space 31. An opening 49aw is provided so that the belt 13 is exposed to the transport space 31, but the opening 49aw may affect the airflow in the transport space 31. If the belt 13 is exposed to the transport space 31 so as to face each of the irradiators 9 individually, the area of ​​the opening 49aw (more specifically, the area of ​​the gap between the opening 49aw and the belt 13) can be reduced. This reduces the effect of the opening 49aw on the airflow in the transport space 31. Each irradiator 9 may be provided with a belt 13 and a heat dissipation mechanism 11, or the number of belts 13 and heat dissipation mechanisms 11 may be less than the number of irradiators 9 (for example, one), and the conveying path of the belt 13 may be bent with multiple rollers 15 so that the belt 13 is exposed to the conveying space 31 only at the position facing each irradiator 9. In the latter case, the proportion of the area of ​​the belt 13 exposed to the conveying space 31 can be reduced, thereby improving the heat dissipation from the belt 13.

[0112] When the conveying path of the belt 13 is more complex than the example in Figure 2 (a polygon and / or meandering shape with n being 3 or more sides), the multiple rollers 15 may include, for example, those located at the boundary between the irradiated and non-irradiated areas, and those located in the non-irradiated area (and may also include those located only in the irradiated area). In this case, the configuration of the former (structure, material, diameter, etc.) and the configuration of the latter may be the same or different from each other. Furthermore, the configurations of the rollers 15 located at the boundary and the rollers 15 located in the non-irradiated area may also be the same or different from each other.

[0113] (4.4. Cooling Device) (4.4.1. General Cooling Devices) The cooling device for cooling the belt 13 may be of various types. For example, the cooling device may use a refrigerant (example in Figure 2), a Peltier element, or a combination of both. Also, for example, the refrigerant may be a gas (not limited to air), a liquid, or something that undergoes a change of state. Primary and secondary refrigerants may be used. Furthermore, the cooling device may be air-cooled (usually using air) (example in Figure 2), or water-cooled (not necessarily using water).

[0114] The cooling device may cool any part of the belt 13. For example, the cooling device may contribute to the cooling of the entire belt 13, or it may cool the unirradiated part (part or all of it) that is not irradiated with UV light, or it may cool the irradiated part (part or all of it) that is irradiated with UV light. In any of the above embodiments, the degree of cooling may differ (or be the same) between the parts being cooled. For example, the cooling device may cool the unirradiated part (part or all of it) more than the irradiated part (all of it) (including the embodiment in which the irradiated part is not cooled). In this case, for example, the cooling device may be configured such that the flow rate of gas or liquid per unit area is greater in the unirradiated part than in the irradiated part, or the cooling member through which the refrigerant flows (described later with reference to Figure 4) may be brought into contact only with the unirradiated part.

[0115] (4.4.2. Air Cooling System (Blower)) The blower 45 shown in Figure 2 is located in a containment space 32 separated from the transport space 31 by a plate 49a, for example. It sucks in gas from the containment space 32 and blows it toward the belt 13. More specifically, in the illustrated example, the blower 45 sucks in air from the -D1 side and blows it toward the +D1 side. The air blown from the blower 45 directly hits the portion of the belt 13 located within the containment space 32 (the non-irradiated portion that is not irradiated with UV).

[0116] The number, position, and direction of airflow of the blowers 45 are arbitrary. In the illustrated example, the airflow direction (towards +D1) is opposite to the transport direction of the portion of the belt 13 that is not irradiated with UV (unirradiated portion) and is the same as the transport direction of the media 101. Unlike the illustrated example, the airflow direction may be the same as the transport direction of the unirradiated portion and / or opposite to the transport direction of the media 101, or it may be a direction intersecting the unirradiated portion (for example, towards -D3 or D2), or it may be a direction intersecting any of the three axial directions described above. Two or more blowers 45 may be arranged to realize one of the airflow directions in the above example, or two or more airflow directions in the above example.

[0117] The configuration of the blower 45 is also arbitrary. For example, the blower 45 blows air by rotating an impeller (not shown). However, the blower 45 may also drive a rotor or a piston. Furthermore, fans (e.g., pressure ratio of 1.1 or less) and blowers (e.g., pressure ratio greater than 1.2) may be distinguished by their pressure ratio, and blowers (e.g., pressure ratio less than 2) and compressors (e.g., pressure ratio of 2 or more) may be distinguished, but the blower 45 of this disclosure may include all of these. Also, the suction direction and the blowing direction may be coaxial (as shown in the example) or they may intersect each other. The airflow rate of one blower 45 or all blowers 45 in the irradiation unit 7 is also arbitrary.

[0118] The housing 49 may have one or more vents 49h to allow the housing space 32 to be exposed to the outside (or it may not have any). This allows, for example, the housing space 32 to take in air from around the auxiliary device 5 and bring its internal temperature closer to ambient temperature (for example, 5° to 35°C). The position, number, shape, and dimensions of the vents 49h are arbitrary.

[0119] In the example shown in Figure 2, multiple vents 49h are formed on the upper surface of the housing 49. One or more vents 49h on the left side of the figure (upstream of the blower 45) generally contribute to intake of air into the housing space 32. The vents 49h on the right side of the figure (downstream of the blower 45) generally contribute to exhaust from the housing space 32. In addition to the upper surface of the housing 49, the vents 49h may also be formed on the sides.

[0120] Unlike the example in Figure 2, for example, some or all of the vents 49h may not be distinguishable as either intake or exhaust. That is, the structure, number, position, size, and orientation of the blower 45, as well as the number, position, shape, and dimensions of the vents 49h, may be set in such a manner. Conversely, the accommodation space 32 may be partitioned by the blower 45 or a partition wall containing the blower 45, making the distinction between intake and exhaust clearer than in the illustrated example.

[0121] In the example shown in Figure 2, multiple vents 49h are arranged in a two-dimensional manner (see also Figure 3). Such multiple vents 49h may be realized, for example, by forming a mesh (including perforated metal) on part or all of the top surface (and / or side surface) of the housing 49.

[0122] Unlike the illustrated example, slit-shaped vents 49h extending in the D1 or D2 direction may be arranged in parallel with each other, or one or two relatively large vents 49h may be provided. The vents 49h (for example, the relatively large ones) may be connected to a duct (not shown) to perform intake and / or exhaust from a position away from the irradiation unit 7.

[0123] The intake (and / or exhaust) ducts described above may be open to the atmosphere or connected to a cooling system including a chiller utilizing a refrigeration cycle. In the latter case, the temperature of the gas (e.g., air) supplied to the containment space 32 by the cooling system may be ambient temperature (e.g., 5°C to 35°C), lower, or higher.

[0124] Furthermore, the storage space 32 may be open to the outside in a manner that makes it difficult to identify the ventilation opening 49h. For example, the housing 49 may have a shape in which most (e.g., 80% or more) or all of the top surface and / or most (e.g., 80% or more) of at least the portion of one or both sides above the transport space 31 is eliminated.

[0125] (4.4.3. Other Examples of Air Cooling Systems) Figure 4 shows another example of an air cooling system. In this example, the focus is not on directly blowing air from the blower 45 onto the belt 13, but rather on ventilating the containment space 32 (part or all of it) where the belt 13 (e.g., the part that is not irradiated with UV light) is located. Note that the example in Figure 2 can achieve both of the above effects.

[0126] Specifically, in the example shown in Figure 4, the belt 13 is not located in the region extending in the direction of airflow from the air outlet of the blower 45 (which in the illustrated example is not the blower 45 itself, but the vent 49h). Therefore, it can be assumed that the wind does not directly hit the belt 13. However, in reality, the spread-out wind does hit the belt 13. In the example shown in Figure 2, the belt 13 is located in the region extending in the direction of airflow from the air outlet.

[0127] Ventilation of the containment space 32 may be promoted by providing the blower 45, the intake vent 49h, and the exhaust vent 49h in an appropriate positional relationship. In the illustrated example, the blower 45 and the intake vent 49h are adjacent to each other. The intake vent 49h and the exhaust vent 49h are separated on opposite sides on the upper surface of the air-cooling chamber 32a (described later), which is part of the containment space 32. As a result, as indicated by the arrows, the gas blown downward from the blower 45 flows in a U-shape along the inner surface of the air-cooling chamber 32a and is discharged from the exhaust vent 49h.

[0128] In Figure 4, two relatively large vents 49h are shown as an example. One or both of these vents 49h may be connected to a duct (not shown), as previously mentioned. Also, as previously stated, multiple intake vents 49h and / or multiple exhaust vents 49h may be provided.

[0129] In the example shown in Figure 4, the blower 45 is located on the outside of the housing 49. This arrangement may be applied to a configuration in which air is blown directly onto the belt 13. In this case, the belt 13 may be located in a region extending from the blower 45 in the direction of airflow, or a duct (not shown) extending from the blower 45 to guide the airflow may open toward the belt 13. Conversely, the configuration in which the blower 45 is located inside the housing 49 may be applied to a configuration in which air from the blower 45 is not blown directly onto the belt 13.

[0130] In the example shown in Figure 4, the blower 45 is fixed to the housing 49 (or adjacent to it, from another viewpoint). Unlike the illustrated example, the blower 45 may be located away from the housing 49. Air may also be supplied into the housing 49 via a duct (not shown). This air may or may not be blown directly onto the belt 13.

[0131] (4.4.4. Water Cooling System) Figure 4 also illustrates a water cooling system. Specifically, among the multiple rollers 15, the roller 15 marked "W / C" has liquid coolant flowing inside it. This cools the belt 13. The liquid coolant may be, for example, water at room temperature (e.g., 5°C to 35°C) or a liquid (water or other liquid) supplied by a cooling system including a chiller.

[0132] Unlike the illustrated example, the water cooling system may directly immerse the belt 13 in a coolant (e.g., water). In this case, for example, the portion immersed in the coolant may be dried before it reaches the position where UV light is applied. This may reduce the likelihood of the coolant adhering to the media 101. An air cooling system may be used for this drying.

[0133] (4.5. Temperature Sensor) The temperature sensor 47 shown in Figure 2 detects the temperature of the belt 13 and outputs it to the controller 23. The controller 23 controls the irradiator 9 (more specifically, the driver that supplies power to the light source, although not shown in particular) based on the detected temperature. For example, when the detected temperature exceeds a predetermined threshold, the controller 23 stops the irradiator 9 from generating UV. This reduces the likelihood that the temperature of the belt 13 may rise excessively due to some abnormality.

[0134] The temperature sensor 47 may directly detect the temperature of the belt 13, or it may detect a temperature correlated with the temperature of the belt 13. Examples of the latter include the temperature of the roller 15, the temperature of the gas in the containment space 32, the temperature of the housing 49, and / or the temperature of the refrigerant or appropriate part of the cooling device that cools the belt 13. Furthermore, the temperature of the belt 13 may be the temperature of the part that is not irradiated with UV light (unirradiated part), the temperature of the part that is irradiated with UV light (irradiated part), or the average temperature of both. Two or more temperature sensors 47 or a thermograph, etc., may be used to detect the temperatures of both the unirradiated and irradiated parts, or to detect the temperatures of multiple locations in the unirradiated and / or irradiated parts.

[0135] The temperature sensor 47 may be a contact type or a non-contact type. A contact type sensor may be, for example, a thermocouple, a resistance thermometer, or a thermistor. A non-contact type sensor may be, for example, an infrared temperature sensor. The object of contact or non-contact may be the belt 13 or something else, as can be understood from the above description. Also, as can be understood from this, the position of the temperature sensor 47 is arbitrary, and may be fixed to the housing 49, the roller 15, or the cooling device. In Figure 2, an example is shown of an infrared temperature sensor fixed to the housing 49 directly above the belt 13, which non-contactively detects the temperature of the non-irradiated portion of the belt 13.

[0136] The method for determining whether or not to stop UV generation in the controller 23 is also arbitrary. For example, the temperature compared with the threshold described above may be the temperature at one location, a representative value (e.g., average or maximum value) at multiple locations, the temperature at each sampling period, or a representative value (e.g., average value) at a predetermined number of sampling periods.

[0137] The values ​​detected by the temperature sensor 47 may be used for other purposes in addition to, or instead of, stopping UV generation. For example, they may be used to change the operation of the heat dissipation mechanism 11 (e.g., the electric motor 17) and / or the operating state of the cooling device (e.g., the blower 45).

[0138] (4.6. Thermal insulation material 51) As shown in Figures 2 and 3, at least one of the multiple plates (49a and 49b, etc.) that make up the transport space 31 may have thermal insulation material 51. The thermal insulation material 51 makes it easier to maintain the temperature of the transport space 31 at a target temperature, for example.

[0139] The thermal insulation material 51 may be present in all units (7, 35, 37) of the main body of the device 33 (as shown in the illustration), or in only some units. An example of the latter is a configuration in which only the irradiation unit 7 has the thermal insulation material 51.

[0140] Furthermore, the thermal insulation material 51 may be present on all four surrounding plates (as in the example in Figure 3), or on only some of the plates. An example of the latter is a configuration in which only one or both of the upper and lower plates (49a and 49b) have the thermal insulation material 51.

[0141] The thermal insulation material 51 may constitute the surface of the plate on the transport space 31 side (as shown in the illustration), the surface on the opposite side, the intermediate layer of the plate, or the entire plate. Furthermore, the thermal insulation material 51 may be placed on both the transport space 31 side and the opposite side of the base plate that ensures the rigidity of the plate.

[0142] The material of the insulation material 51 is arbitrary. For example, the material may be a fibrous material that holds gas (e.g., air) with fibers, a foamed material having multiple air bubbles, or any other material (e.g., paint containing hollow beads). Specific fibrous materials may be, for example, glass wool, rock wool, cellulose fiber, carbonized cork, sheep's wool insulation, or wood fiber. Specific foamed materials may be, for example, urethane foam, phenolic foam, polystyrene foam, or foamed rubber.

[0143] The thermal conductivity and other properties of the insulation material 51 are also arbitrary. For example, the thermal conductivity of the insulation material 51 is lower than that of the rigid component of the housing 49 (for example, the upper layer of the plate 49a). Furthermore, the thermal conductivity of the insulation material 51 may be, for example, 0.1 W / m·K or less or 0.05 W / m·K or less.

[0144] (4.7. Partitions) In the example of Figure 4, the storage space 32 is divided into two or more spaces (three in the example) by one or more partitions 53A and 53B (two in the illustrated example). One space (direct access space 32d, an example of a third space) leads directly to an opening 49aw for exposing the belt 13 to the conveying space 31. The other spaces (water cooling chamber 32w and / or air cooling chamber 32a, each or a combination of which is an example of a fourth space) house, for example, at least a portion of the belt 13 that is not irradiated with UV light (non-irradiated portion). Furthermore, the other spaces (32w and / or 32a) do not lead directly to the opening 49aw (they lead to the opening 49aw via the direct access space 32d). This reduces, for example, the influence of the temperature and / or airflow of the other spaces on the temperature and / or airflow of the conveying space 31.

[0145] The opening 49aw has a relatively large opening area because it exposes the belt 13. Part of the area of ​​the opening 49aw is covered by the belt 13, but the actual opening area of ​​the opening 49aw, excluding the belt 13, is also relatively large. Therefore, the airflow passing through the opening 49aw may affect the temperature and / or airflow of the conveying space 31. By restricting the airflow between the direct space 32d and the other space (fourth space), the airflow passing through the opening 49aw is reduced, thus reducing the impact on the conveying space 31. The restriction of airflow between the direct space 32d and the other space (fourth space) may also be achieved by providing openings 53a and / or 53b through which the belt 13 passes and blocking the other parts. The openings 53a and / or 53b only need to allow the belt 13 to pass, so the opening area can be made relatively small. If the effective opening area between the direct passage space 32d and the other space (the fourth space) (total of the opening area in one partition 53A or 53B) is made smaller than the effective opening area of ​​the opening 49aw, the impact on the transport space 31 can be reduced. In particular, if the other space (the fourth space) is the air-cooling chamber 32a, the airflow for air cooling from the air-cooling chamber 32a may affect the transport space 31 through the opening 49aw, but this impact can be reduced by providing the direct passage space 32d. This impact can be further reduced by narrowing the openings 53a and / or 53b.

[0146] The number of partitions (53A and 53B) is arbitrary. Unlike the illustrated example, there may be only one partition or three or more. One or more partitions may form two or more (number of partitions + 1) spaces connected in series from the opening 49aw to the outside of the accommodation space 32 (or the ventilation opening 49h from another viewpoint), as shown in the illustrated example. However, although not specifically shown, one or more of the two or more partitions may contribute to forming two or more spaces connected in parallel to each other with respect to the opening 49aw.

[0147] The space to which the air cooling system is applied (air-cooled chamber 32a) can be described as, for example, a space to which air from a blower 45 is supplied directly or via a duct (not shown) (in other words, without going through other spaces within the containment space 32). Alternatively, the air-cooled chamber 32a can be described as a space having a blower 45, as in the example in Figure 2. The direct-access space 32d is not to which the air cooling system is applied. Between the air-cooled chamber 32a and the direct-access space 32d, there may or may not be one or more buffer spaces (water-cooled chamber 32w) to which the air cooling system is not applied (as shown in the example).

[0148] In the illustrated example, the buffer space is a water-cooled chamber 32w to which a water-cooling system is applied. However, the buffer space may be used for a cooling system other than a water-cooling system, or it may be a space to which no cooling system is applied. In the former embodiment, the cooling system may, for example, not generate airflow within the buffer space. For example, a Peltier element and / or heat sink constituting the housing 49 may be provided. In the embodiment to which no cooling system is applied, the buffer space may be ventilated relatively slowly by airflow from the air-cooled chamber 32a, and may also contribute to (or not contribute to) relatively slow heat dissipation from the belt 13.

[0149] The configuration of the partitions is arbitrary. For example, if only one partition is provided, that partition, or if multiple partitions are provided, some or all of the partitions may be configured to cover the opening 43aw, as exemplified by partition 53A, or not to cover the opening 43aw, as exemplified by partition 53B. In another view, the accommodation space 32 may be partitioned vertically, horizontally, both vertically and horizontally (simultaneously), or sequentially vertically and horizontally.

[0150] In the partition, the configuration of the hole through which the belt 13 passes is arbitrary. For example, the partition may have two holes (e.g., slits), as in partition 53A, or it may have one hole, as in partition 53B. In either case, only the belt 13 may be located in the hole of partition 53A, or the roller 15 may be located in the hole of partition 53B. In addition, partitions without a hole for the belt 13 to pass through may be provided. Such partitions contribute, for example, to the configuration of an insulated space that improves the heat insulation between the housing 49 and the outside.

[0151] The configuration of the partitions (53A and 53B) is arbitrary. For example, the partitions may be rigid or flexible. Rigid partitions may be plate-shaped (e.g., flat) (as shown in the illustration) or block-shaped. The material of the partitions may be the same as or different from the material of the housing 49. In any case, the description of the material of the housing 49 (including the description of the insulation material 51) may be applied to the partitions, as long as no contradictions arise.

[0152] (5. Summary of Embodiments) As described above, the auxiliary device 5 (an example of a recording auxiliary device) according to the embodiment includes an irradiator 9 and a heat dissipation mechanism 11. The irradiator 9 irradiates the media 101 (an example of a recording medium) with ultraviolet (UV) light. The heat dissipation mechanism 11 has a belt 13 (component) on the side of the media 101 opposite to the irradiator 9 (+D3 side). The heat dissipation mechanism 11 moves the belt 13 so that the portion of the belt 13 that is irradiated by UV light that leaks through the media 101 without being blocked is changed. In other words, the heat dissipation mechanism 11 moves the belt 13 so that the portion of the belt 13 facing the media 101 (or the irradiator 9 in other words) is changed. UV light that leaks through the media 101 without being blocked refers to, for example, UV light that passes outside the media 101 and / or UV light that penetrates the media 101. If the media 101 has a low UV transmittance, such as plain paper, the heat dissipation mechanism 11 may be provided only in the area where UV rays passing through the outside of the media 101 strike it. If the media 101 is a resin film or the like with a high UV transmittance, the heat dissipation mechanism 11 may be provided in the area where UV rays passing through the outside of the media 101 strike it and in the area where UV rays passing through the media 101 strike it.

[0153] Furthermore, the recording system 19 according to this embodiment includes the auxiliary device 5 described above and an ejection device 3 that ejects ink (an example of a liquid) toward the media 101.

[0154] The printer 1 (an example of a recording device) according to this embodiment includes a recording system 19 as described above and a transport device 21 for transporting media 101.

[0155] The printing method according to this embodiment includes: ejecting ink toward the media 101; irradiating the media 101 with ultraviolet light by the irradiator 9; and moving the belt 13 (component) located on the opposite side of the media 101 from the irradiator 9 so that the portion of the belt 13 that is irradiated by UV light that has leaked out without being blocked by the media 101 is changed.

[0156] Therefore, as described in the overview of the embodiment, for example, the probability of the temperature of the component located behind the media 101 as seen from the irradiator 9 rising can be reduced.

[0157] The heat dissipation mechanism 11 may include a belt 13 as a component to which leaked UV light is irradiated, and a plurality of rollers 15 on which the belt 13 is stretched.

[0158] In this case, for example, the overall configuration of the heat dissipation mechanism 11 is simpler compared to a configuration using multiple plates. Also, for example, compared to a configuration using a disc, it is advantageous for miniaturization in the width direction (D2 direction). Furthermore, unlike the case using a cylinder, for example, heat dissipation can be improved by lengthening the transport path of the belt 13 (by increasing the size in two dimensions), thus reducing the likelihood of the size increasing in three dimensions. Also, unlike the case using a cylinder, for example, even if deformation occurs due to heat, applying tension to eliminate the bending of the part irradiated with UV light reduces the likelihood of a change in the positional relationship between the belt 13 and the media 101.

[0159] The multiple rollers 15 may include three or more rollers 15 that are not located on the same straight line as viewed in the axial direction (Figure 4).

[0160] In this case, for example, compared to the configuration in which the belt 13 is stretched over only two rollers 15 (Figure 2), the length of the belt 13 can be eliminated, thereby improving heat dissipation.

[0161] The auxiliary device 5 may have a cooling device for cooling the belt 13. Note that since the cooling device is a "device," it does not include a cooling system that only has a heat sink.

[0162] In this case, for example, heat dissipation from the belt 13 can be actively promoted to improve the effects described above.

[0163] The cooling system may include a blower 45. In other words, the cooling system may perform air cooling.

[0164] In this case, for example, the cooling system is simplified and / or miniaturized compared to water cooling. Maintenance is also easier because there is no need to manage liquid leaks, and the likelihood of corrosion caused by liquid is low.

[0165] The auxiliary device 5 may have a housing 49 (or a housing for all units, an example of a passage member) that constitutes a transport space 31 through which the media 101 passes (part or all of which may be an example of a first space). The housing 49 may have a plate 49a facing the transport space 31. The plate 49a may have an opening 49aw. The heat dissipation mechanism 11 may change the portion of the belt 13 that is exposed to the transport space 31 through the opening 49aw. Here, exposure refers to whether or not UV light is irradiated onto the belt 13 (a light-transmitting member that blocks the opening 49aw may be present).

[0166] In this case, for example, the heat and / or airflow around the media 101 is kept constant by the transport space 31, which is isolated to a certain extent from the outside of the housing 49 in terms of heat and / or airflow. The belt 13 is exposed to the transport space 31 only as needed by the opening 49aw. As a result, for example, the drying state of the media 101 is stabilized.

[0167] The auxiliary device 5 may include partitions 53A and / or 53B and a blower 45. Partitions 53A and / or 53B divide the storage space 32 (an example of a second space), located on the opposite side of the transport space 31 from the plate 49a, into a direct passage space 32d (an example of a third space) and a water-cooled chamber 32w and / or an air-cooled chamber 32a (each or a combination thereof, an example of a fourth space). The direct passage space 32d is connected to the opening 49aw. The water-cooled chamber 32w and / or the air-cooled chamber 32a are connected to the opening 49aw via the direct passage space 32d, and a portion of the belt 13 is located there. The blower 45 air-cools the portion of the belt 13 (an air-cooling system is applied to the fourth space).

[0168] In this case, for example, the influence of the airflow from the blower 45 on the pressure and / or airflow near the opening 49aw is reduced. As a result, the pressure and / or airflow in the conveying space 31 becomes stable.

[0169] The auxiliary device 5 may have a hot air mechanism 27 that sends hot air into the transport space 31.

[0170] In this case, for example, the burden on the irradiation unit 7 can be reduced compared to a method in which the ink temperature is raised by UV light alone. As a result, for example, the intensity of the UV light emitted by the irradiator 9 can be reduced, or the length in the D1 direction from which the irradiator 9 emits UV light can be shortened. Consequently, the heat dissipation mechanism 11 can also be miniaturized.

[0171] The auxiliary device 5 may have a suction mechanism 29 for sucking gas from the transport space 31.

[0172] In this case, for example, the drying of the ink is accelerated by removing moisture from the transport space 31. As a result, the burden on the irradiation unit 7 can be reduced compared to, for example, a method in which the ink is dried by UV light alone. Consequently, the heat dissipation mechanism 11 can also be miniaturized.

[0173] Plate 49a may contain the insulating material 51.

[0174] The transport space 31 is intended to be maintained at a temperature higher than room temperature by UV light or the like to promote drying. On the other hand, the containment space 32 is intended to be at a lower temperature than the transport space 31 to allow heat dissipation from the belt 13. In other words, a temperature difference is intended between the two spaces. Because the plate 49a contains the insulating material 51, the degree of heat exchange between the two spaces can be reduced. As a result, for example, maintaining the temperature of each of the two spaces becomes easier.

[0175] The auxiliary device 5 may include a temperature sensor 47 (an example of a sensor) for detecting the temperature of the belt 13, and a controller 23 that stops the irradiator 9 from generating UV based on the detection result of the temperature sensor 47.

[0176] In this case, for example, the likelihood of the belt 13 temperature rising excessively due to some abnormality can be reduced. Also, for example, if the user's settings related to the operation of the auxiliary device 5 are outside the appropriate range, it can prompt the user to reset them.

[0177] The UV reflectivity of belt 13 may be 30% or less.

[0178] In this case, for example, the amount of UV light reflected from the belt 13 and irradiated onto components (including the irradiator 9) located around the media 101 can be reduced. As a result, for example, the likelihood of unintended temperature increases is reduced.

[0179] As the ink, a solution in which a UV absorber is dispersed in an aqueous solvent may be used. The ink may also be dried by generating heat from the UV absorber in the ink during UV irradiation.

[0180] In this case, for example, by using UV light and UV absorbers, non-UV-curable inks can be dried in a short time (short distance). As a result, for example, it becomes easier to reduce the size of the printer 1 that uses water-based ink.

[0181] The UV irradiance is 1000 mW / cm². ２ The length of the irradiator 9 in the media transport direction (D1 direction) of the media 101 may be 3 cm or more.

[0182] In this case, for example, UV light is being used at a relatively high illuminance over a relatively long distance. As a result, heat from leaked UV light tends to increase. In such situations, heat dissipation by belt 13 is effective.

[0183] The technology relating to this disclosure is not limited to the embodiments described above and may be implemented in various forms.

[0184] For example, the recording device is not limited to those generally classified as printers. For instance, the recording device may be a plotter. Furthermore, the recording auxiliary device may be operated and controlled completely independently of the ejection device and transport device (a higher-level controller, as mentioned in the embodiment, may not be provided).

[0185] 1...Printer (recording device), 3...Ejector, 5...Auxiliary device (recording auxiliary device), 9...Irradiator, 11...Heat dissipation mechanism, 13...Belt (component), 19...Recording system, 21...Conveyor device, 101...Media (recording medium).

Claims

1. A recording assist device comprising: an irradiator for irradiating a recording medium with ultraviolet light; and a heat dissipation mechanism having a component on the opposite side of the recording medium from the irradiator, which moves the component such that the portion of the component that is irradiated by the ultraviolet light that leaks through without being blocked by the recording medium is changed.

2. The recording assistance device according to claim 1, wherein the heat dissipation mechanism comprises a belt as a component and a plurality of rollers on which the belt is stretched.

3. The recording assist device according to claim 2, wherein the plurality of rollers include three or more rollers that are not located on the same straight line as viewed in the axial direction.

4. A recording assistance device according to any one of claims 1 to 3, further comprising a cooling device for cooling the component.

5. The recording assistance device according to claim 4, wherein the cooling device includes a blower.

6. A recording assist device according to any one of claims 1 to 5, comprising a passage member that constitutes a first space through which the recording medium passes, the passage member having a plate facing the first space, the plate having an opening, and the heat dissipation mechanism modifying the portion of the component exposed to the first space through the opening.

7. A recording assistance device according to claim 6, comprising: a partition that divides a second space located on the opposite side of the plate from the first space into a third space that is connected to the opening and a fourth space that is connected to the opening via the third space and in which a part of the component is located; and a blower for air-cooling the part of the component.

8. The recording assistance device according to claim 6 or 7, further comprising a hot air mechanism for supplying hot air to the first space.

9. A recording assistance device according to any one of claims 6 to 8, having a suction mechanism for drawing gas from the first space.

10. The recording assistance device according to any one of claims 6 to 9, wherein the plate includes an insulating material.

11. A recording assistance device according to any one of claims 1 to 10, further comprising: a sensor for detecting the temperature of the component; and a controller for stopping the generation of ultraviolet light by the irradiator based on the detection result of the sensor.

12. The recording assist device according to any one of claims 1 to 11, wherein the ultraviolet reflectance of the component is 30% or less.

13. A recording system comprising: a recording assist device according to any one of claims 1 to 12; and a dispensing device for dispensing liquid toward the recording medium.

14. A recording device comprising: a recording system according to claim 13; and a transport device for transporting the recording medium.

15. A printing method comprising: ejecting ink toward a recording medium; irradiating the recording medium with ultraviolet light by an irradiator; and moving a component located on the opposite side of the recording medium from the irradiator such that the portion of the component irradiated by the ultraviolet light that leaks through the recording medium without being blocked is changed.

16. The printing method according to claim 15, wherein the ink is a solution in which an ultraviolet absorber is dispersed in an aqueous solvent, and the ultraviolet absorber in the ink is heated by irradiation with ultraviolet light to dry the ink.

17. The irradiance of the ultraviolet light is 1000 mW / cm². ２ The printing method according to claim 15 or 16, wherein the length of the irradiator in the transport direction of the recording medium is 3 cm or more.

Images