JP2005231235A - Ink jet recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ink jet recorder capable of attaining a high quality image stably by stabilizing emission efficiency of a light source and irradiating a quantity of light suitable for curing ink thereby curing ink well. <P>SOLUTION: The ink jet recorder comprises a Peltier module 23 for cooling or heating the base part 20 of a light source 17, and a section 29 for controlling heat transfer by the Peltier module 23 such that the temperature at the base part 20 has a predetermined level. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an inkjet recording apparatus, and more particularly to an inkjet recording apparatus that records an image using a photocurable ink that is cured by irradiation with light.

  In recent years, inkjet recording apparatuses have come to be used more frequently because images can be formed easily and inexpensively compared to methods that require plate making, such as gravure printing methods and flexographic printing methods. Yes.

  In the field of recording an image on a product or product packaging using an inkjet recording apparatus, a material having no ink absorbability such as resin or metal is often used for the product or product packaging. In order to fix the ink on the recording medium using such a non-ink-absorbing material as a recording medium, a nozzle for discharging ink that is cured by irradiating light such as ultraviolet rays is provided. A recording head and a light irradiation device provided with a light source that generates light for curing the ink. After the ink ejected from the nozzles is landed on the recording medium, the light irradiation device applies light to the recording medium. An ink jet recording apparatus that cures ink by irradiation to form an image is known (see, for example, Patent Document 1).

  Here, if the time from when the ink lands on the recording medium until the light is irradiated is long, the dot diameter of the ink that has landed on the recording medium increases, causing blurring and color mixing, resulting in a decrease in image quality. To do. Therefore, in order to shorten the time from when the ink lands on the recording medium until the light is irradiated, in the conventional ink jet recording apparatus, the light irradiation apparatus is provided close to the recording head. For this reason, in order to prevent the light emitted from the light source from reaching the nozzle forming surface of the recording head and the ink adhering to the nozzle forming surface from being cured, the light irradiation device is a cover member that covers the light source. It has.

  In addition, since light such as ultraviolet rays emitted from the light irradiation device may adversely affect the human body, an ink jet recording apparatus including such a light irradiation device that emits light can be safely used in a room such as an office. In order to prevent the light irradiated from the light irradiation device from leaking to the outside, a cover member is provided on the light irradiation device.

  As described above, when the light source is placed in the space surrounded by the cover member, since the heat generated from the light source or the like is not radiated, the temperature near the light source rises and the ink that has landed on the recording medium May deteriorate. As a conventional ultraviolet light source, a high-power / high-power type such as a high-pressure mercury lamp or a metal halide lamp is used, and its heat generation temperature is as high as 650 to 900 ° C., and this tendency is particularly remarkable.

By the way, in recent years, an energy storage type cation curable ink that can be cured by irradiation for a long time even at low illuminance has been proposed. In order to cure this cation curable ink, an exothermic temperature is 70 to 130 °. Low power and low output ultraviolet light sources such as low-pressure mercury lamps and cold cathode tubes, which are kept as low as C, can be used.
JP-A-60-132767

  However, since the light emission efficiency of the low-power type light source has a property that depends on the temperature of the base part of the light source that performs discharge, when the temperature in the cover member rises due to heat generation of the light source and the temperature of the base part fluctuates, There has been a disadvantage that the light emission efficiency of the light source changes and it becomes difficult to stably maintain a light amount suitable for curing the ink.

  Therefore, the present invention can stabilize the light emission efficiency of the light source and stably cure the ink by irradiating light with a light amount suitable for curing the ink, thereby obtaining a stable and high-quality image. It is an object of the present invention to provide an ink jet recording apparatus that can be used.

  According to the first aspect of the present invention, a recording head formed with a nozzle that discharges ink that is cured by irradiating light to a recording medium, and light that discharges at the base and cures the ink is emitted. Inkjet recording for recording an image by irradiating light from the light irradiation device onto the ink ejected from the recording head and landing on the recording medium to cure the ink In the apparatus, a Peltier module that cools or heats the base part and a control unit that controls heat transfer by the Peltier module so that the temperature of the base part becomes a predetermined temperature are provided.

  According to the first aspect of the present invention, since the heat transfer by the Peltier module is controlled and the temperature of the base part is adjusted to a predetermined temperature, the light emission efficiency of the light source is stable and suitable for ink curing. Light intensity is maintained.

  According to a second aspect of the present invention, in the ink jet recording apparatus according to the first aspect, a temperature detection unit that detects a temperature of the base unit is provided, and the control unit is configured to detect the base unit detected by the temperature detection unit. The heat transfer by the Peltier module is controlled based on the temperature of the Peltier module.

  According to the second aspect of the present invention, the heat transfer by the Peltier module is controlled based on the temperature of the base part detected by the temperature detecting means, and the temperature of the base part is adjusted to a predetermined temperature. Therefore, the light emission efficiency of the light source is stabilized, and the light quantity suitable for ink curing is maintained.

  According to a third aspect of the present invention, in the ink jet recording apparatus according to the first or second aspect, the control unit is configured to heat the Peltier module so that the temperature of the base unit is within 40 ± 5 ° C. It is characterized by controlling movement.

  According to the third aspect of the present invention, since the heat transfer by the Peltier module is controlled and the temperature of the base is adjusted to be within 40 ± 5 ° C., the light emission efficiency of the light source is stabilized, and the ink The amount of light suitable for curing is maintained.

  According to a fourth aspect of the present invention, in the ink jet recording apparatus according to the first or second aspect, the light source is a low-pressure mercury lamp, and the control unit is configured such that the temperature of the base unit is 40 ° C. Further, the heat transfer by the Peltier module is controlled.

  According to the invention described in claim 4, the heat transfer by the Peltier module is controlled and the temperature of the base part is adjusted to 40 ° C. In the low-pressure mercury lamp, the temperature of the base part is 40 ° C. In this case, the light emission efficiency is the highest, so that the light emission efficiency of the light source is stable and the light quantity suitable for ink curing is maintained at low cost.

  According to a fifth aspect of the present invention, in the ink jet recording apparatus according to the first aspect of the present invention, a light amount detection unit that detects a light amount of light emitted from the light irradiation device is provided, and the control unit includes the light amount detection unit. According to the detected light quantity, the heat transfer by the Peltier module is controlled.

  According to the fifth aspect of the present invention, the heat transfer by the Peltier module is controlled based on the amount of light detected by the light amount detecting means and irradiated from the light irradiation device. Therefore, by controlling the heat transfer of the Peltier module based on the amount of light, it is possible to adjust the temperature of the base part to a predetermined temperature, thereby stabilizing the light emission efficiency of the light source and curing the ink. A suitable amount of light is maintained.

  According to a sixth aspect of the present invention, in the ink jet recording apparatus according to any one of the first to fifth aspects, the base portion is formed of aluminum.

  According to the invention described in claim 6, it is possible to efficiently perform heat transfer between the base part by the Peltier module while preventing weight increase, and to easily adjust the temperature of the base part. Become.

  According to a seventh aspect of the present invention, in the ink jet recording apparatus according to any one of the first to sixth aspects, between the base part and the Peltier module, the base part and the Peltier module are arranged. It is characterized by the provision of a heat conduction part for transferring heat between the two.

  According to the seventh aspect of the present invention, the heat transfer between the base part by the Peltier module can be performed efficiently, and the temperature adjustment of the base part can be facilitated.

  According to an eighth aspect of the present invention, in the ink jet recording apparatus according to the seventh aspect, the heat conducting portion is formed of aluminum.

  According to the eighth aspect of the present invention, it is possible to easily adjust the temperature of the base portion by the Peltier module while preventing weight increase.

  According to a ninth aspect of the present invention, in the ink jet recording apparatus according to the seventh or eighth aspect, the thermal conductive grease that conducts heat to a contact portion between the thermal conductive portion and the Peltier module and the base portion, respectively. It is characterized by having applied.

  According to the ninth aspect of the present invention, the heat transfer between the base part by the Peltier module can be performed efficiently, and the temperature adjustment of the base part can be facilitated.

  A tenth aspect of the present invention is the ink jet recording apparatus according to any one of the first to ninth aspects, wherein the base storage portion in which the base portion is stored is formed of a heat insulating material, and the base storage portion It is characterized by providing a heat insulating portion for preventing heat transfer with the outside.

  According to the tenth aspect of the present invention, the heat transfer between the base portion by the Peltier module can be performed efficiently, and the temperature adjustment of the base portion can be facilitated.

  The invention according to claim 11 is the ink jet recording apparatus according to any one of claims 1 to 10, wherein the ink is a cation polymerization ink containing a cation polymerizable compound. .

  According to the eleventh aspect of the invention, since the heat transfer by the Peltier module is controlled and the temperature of the base is adjusted to a predetermined temperature, the light emission efficiency of the light source is stabilized, and the cationic polymerization ink is cured. A suitable amount of light is maintained.

  According to the first aspect of the invention, by controlling the heat transfer by the Peltier module and adjusting the temperature of the base part to be a predetermined temperature, the light emission efficiency of the light source is stabilized and suitable for ink curing. Therefore, the ink can be cured satisfactorily by irradiating with a sufficient amount of light, and as a result, a stable high quality image can be obtained.

  According to the invention described in claim 2, the light emission efficiency of the light source is stabilized by adjusting the temperature of the base part to be a predetermined temperature based on the temperature of the base part detected by the temperature detection unit, The ink can be cured satisfactorily by irradiating light with a light amount suitable for curing the ink, and as a result, a stable high quality image can be obtained.

  According to the third aspect of the present invention, by controlling the heat transfer by the Peltier module and adjusting the temperature of the base part to be within 40 ± 5 ° C., the light emission efficiency of the light source is stabilized, and the ink The ink can be cured satisfactorily by irradiating light with a light amount suitable for curing, and as a result, a stable and high-quality image can be obtained.

  According to the fourth aspect of the present invention, the heat transfer by the Peltier module is controlled so that the temperature of the base is adjusted to 40 ° C., so that the light emission efficiency of the light source is stable in the highest state, and the ink Can be cured efficiently and satisfactorily, and as a result, an efficient and stable high-quality image can be obtained.

  According to the fifth aspect of the present invention, the light emission efficiency of the light source is stabilized by adjusting the temperature of the base portion to a predetermined temperature based on the light amount, and the light amount suitable for ink curing is obtained. Irradiation can be stably performed, and the ink can be cured well. As a result, a stable and high-quality image can be obtained.

  According to the invention described in claim 6, by forming the base portion from aluminum, the temperature of the base portion can be easily adjusted while preventing the weight increase, the luminous efficiency of the light source is stabilized, and the stable high A quality image can be obtained.

  According to the invention described in claim 7, by providing the heat conducting portion between the base portion and the Peltier module, the temperature of the base portion can be easily adjusted, the luminous efficiency of the light source can be stabilized, and the stable high A quality image can be obtained.

  According to the invention described in claim 8, by forming the heat conducting portion with aluminum, the temperature of the base portion is easily adjusted while preventing the weight, and the light emission efficiency of the light source is stabilized, thereby being stable. High quality images can be obtained.

  According to the ninth aspect of the present invention, the heat transfer between the base part by the Peltier module is efficiently performed by the heat conduction grease, so that the temperature of the base part can be easily adjusted and the light emission efficiency of the light source can be stabilized. Stable and high quality images can be obtained.

  According to the invention described in claim 10, by preventing the heat transfer between the base housing part and the outside, the temperature of the base part can be adjusted efficiently, the luminous efficiency of the light source can be stabilized, and stable high quality can be achieved. An image can be obtained.

  According to the eleventh aspect of the present invention, by controlling the heat transfer by the Peltier module and adjusting the temperature of the base part to be a predetermined temperature, the light emission efficiency of the light source is stabilized and suitable for ink curing. The cationic polymerization ink can be cured satisfactorily by irradiating with a sufficient amount of light, and as a result, a stable high quality image can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 5.

  The ink jet recording apparatus 1 according to the present embodiment is a serial head type ink jet recording apparatus 1. As shown in FIG. 1, the inkjet recording apparatus 1 includes a printer main body 2 and a support base 3 that supports the printer main body 2. The printer body 2 is provided with a rod-shaped guide rail 4, and a carriage 5 is supported on the guide rail 4. The carriage 5 reciprocates along the guide rail 4 in the main scanning direction X by a carriage drive mechanism 6 (see FIG. 4).

  As shown in FIG. 2, the carriage 5 is provided with nozzles for ejecting yellow (Y), magenta (M), cyan (C), and black (K) inks to the recording medium 7. A head 8 is mounted. Each recording head 8 communicates with an intermediate tank 9 for storing ink of each color via an ink supply pipe 10.

  The ink used in the present embodiment is an ultraviolet curable ink that is cured by irradiating ultraviolet rays. Ultraviolet curable inks are roughly classified into radically polymerizable inks containing radically polymerizable compounds and cationically polymerizable inks containing cationically polymerizable compounds as polymerizable compounds, but have little inhibitory effect on the polymerization reaction due to oxygen. In addition, an energy storage type cationic polymerization ink that can be cured by irradiating with low-intensity ultraviolet rays for a long time is preferably used.

    As the recording medium 7, a recording medium 7 made of various papers such as plain paper, recycled paper, glossy paper, various fabrics, various non-woven fabrics, resin, metal, glass and the like is applicable. In particular, as the recording medium 7 used in the present embodiment, a transparent or opaque non-absorbing resin film used for so-called soft packaging can be applied.

  As shown in FIG. 1, the central part of the movable range of the carriage 5 is a recording area for recording on the recording medium 7. An ink supply unit 11 that supplies ink to an intermediate tank 9 mounted on the carriage 5 via an ink supply path (not shown) is provided at one end outside the recording area, which is a movable range of the carriage 5. . In addition, a maintenance unit 12 for cleaning the recording head 8 is provided at the other outer end of the recording area which is a movable range of the carriage 5.

  The printer main body 2 is provided with a transport mechanism 13 (see FIG. 4) for feeding the recording medium 7 in the sub-scanning direction Y orthogonal to the main scanning direction X. The transport mechanism 13 includes, for example, a transport motor and a transport roller (not shown), and transports the recording medium 7 in the sub-scanning direction Y by rotating the transport roller by driving the transport motor. Further, the transport mechanism 13 is configured to transport the recording medium 7 intermittently by repeating the transport and stop of the recording medium 7 in accordance with the operation of the carriage 5 during image recording.

  A platen 14 that supports the recording medium 7 from the non-recording surface is provided in the recording area below the carriage 5. This platen 14 is comprised by the flat member.

  On both sides of the recording head 8 in the main scanning direction X, there are provided ultraviolet irradiation devices 15 as light irradiation devices for irradiating the ink discharged from the nozzles onto the recording medium 7 with ultraviolet rays and curing it. As shown in FIG. 2, the ultraviolet irradiation device 15 has a box-shaped cover member 16 that opens toward the recording medium 7. The inside of the cover member 16 is irradiated with ultraviolet rays that cure the ink. A low-pressure mercury lamp 17 is provided as a light source to perform. The light source is not limited to the low-pressure mercury lamp 17, and a black light, a cold cathode tube, or the like may be used.

  As shown in FIG. 2B, the low-pressure mercury lamp 17 includes a bent arc tube 19 and a cylindrical cap part 20 attached to both ends of the arc tube 19. It emits light. Note that the shape of the arc tube 19 of the low-pressure mercury lamp 17 is not limited to that shown in FIG. 2B. For example, a configuration in which the base 20 is attached to both ends of the U-shaped arc tube is used. May be.

  As shown in FIG. 3, a cap housing portion 21 in which the cap portion 20 is housed in the cover member 16 is formed in a rectangular parallelepiped shape so as to cover the periphery of the two cap portions 20 and the Peltier module. The heat conduction part 22 which performs heat conduction between the heat conduction parts 23 and 23 is provided. The heat conduction part 22 and the base part 20 are preferably made of aluminum from the viewpoint of efficiently performing heat transfer between the base part 20 and the Peltier module 23 while preventing the weight of the ultraviolet irradiation device 15 from being increased. . Note that the base part 20 formed integrally with the heat conduction part 22 may be used.

  An opening facing the heat conducting portion 22 is provided on the upper surface of the cover member 16 at a position corresponding to the base housing portion 21, and a plurality of Peltier elements as thermoelectric cooling elements are provided in the opening. A Peltier module 23 electrically connected in series is provided in contact with the heat conducting unit 22. The Peltier module 23 has a power supply unit (not shown). By supplying a direct current to the Peltier element by the power supply unit, the Peltier module 23 absorbs heat from one surface and dissipates heat from the other surface. The Peltier module 23 can switch between the cooling surface and the heating surface by changing the direction of the current flowing through the Peltier element.

  A heat conduction grease for conducting heat conduction between the base part 20 and the Peltier module 23 is applied to the joint part between the base part 20 and the Peltier module 23 and the heat conduction part 22.

  When the heat conduction part abutment surface is a cooling surface, the surface that is opposed to the heat conduction part abutment surface that abuts the heat conduction part 22 of the Peltier module 23 absorbs the heat absorbed and transmitted from the cooling surface. A heat sink 24 for radiating heat is joined. A cooling fan 25 that dissipates heat radiated from the heat sink 24 is provided above the heat sink 24.

  In addition, a bottom plate 26 that covers the base housing part 21 is attached to a position corresponding to the base storage part 21 on the recording medium facing surface of the cover member 16 that faces the recording medium 7.

  Between the cover member 16 and the bottom plate 26 and the heat conducting portion 22, a heat insulating portion 27 that is formed of a heat insulating material and prevents heat transfer between the base housing portion 21 and the outside is provided.

  Further, a temperature sensor 28 is provided in the heat conducting unit 22 as temperature detecting means for detecting the temperature of the base unit 20 by detecting the temperature of the heat conducting unit 22.

  FIG. 4 shows a control device for controlling the ink jet recording apparatus 1 according to the present embodiment. This control device includes, for example, a CPU, a RAM, and a ROM (all not shown). It has a control unit 29 that expands the recorded processing program in the RAM and executes the processing program by the CPU.

  The control unit 29 is configured according to the processing program described above, based on the status of the carriage drive mechanism 6, the transport mechanism 13, the recording head 8, the ultraviolet irradiation device 15, the Peltier module 23, the cooling fan 25, and the like. It is designed to control the operation.

  In particular, in the inkjet recording apparatus 1, the temperature sensor 28 is connected to the control unit 29, and the control unit 29 sets the temperature of the base unit 20 to a predetermined temperature according to the detection result of the temperature sensor 28. The Peltier module 23 is controlled.

  Since the low-power light source has a characteristic that the energy generated by ultraviolet rays varies depending on the temperature of the base part 20, the temperature of the base part 20 that generates ultraviolet rays in a state where the light emission efficiency is good is obtained in advance. It is good to be kept at. In general, in a low output light source, when the temperature of the base part 20 is 40 ± 5 ° C., the output is stable and the light emission efficiency is good, so that the temperature of the base part 20 is 40 ± 5 ° C. 23 is preferably controlled.

  For example, in the low-pressure mercury lamp 17, as shown in FIG. 5, when the temperature of the base part 20 is 40 ° C., the mercury vapor pressure of the low-pressure mercury lamp 17 becomes 0.8 Pa, and the ultraviolet light emission efficiency is the best. Therefore, in the present embodiment, the control unit 29 controls the Peltier module 23 so that the temperature of the base unit 20 becomes 40 ° C. while measuring the temperature of the base unit 20 with the temperature sensor 28 as needed. ing.

  Specifically, when the temperature of the base part 20 detected by the temperature sensor 28 is higher than 40 ° C., the control part 29 is arranged in a direction in which the heat conduction part contact surface of the Peltier module 23 becomes the cooling surface. While controlling a power supply part so that a direct current may be sent through an element, the cooling fan 25 is rotationally driven.

  On the other hand, when the temperature of the base part 20 detected by the temperature sensor 28 is lower than 40 ° C., the control part 29 directs the Peltier element in the direction in which the heat conduction part contact surface of the Peltier module 23 becomes the heating face. The power supply unit is controlled so that a current flows.

  Next, the operation of the ink jet recording apparatus 1 in the present embodiment will be described.

  When the image recording operation is started, the recording medium 7 is transported in the transport direction Y by the transport mechanism 13, and when the recording medium 7 reaches a predetermined position of the platen 4, the carriage 5 reciprocates along the guide rail 4 and the recording head 8. Necessary ink is ejected from the nozzles based on predetermined image data. At the same time, the low-pressure mercury lamp 17 of the ultraviolet irradiation device 15 is turned on, and the ultraviolet rays are irradiated to the ink ejected on the recording medium 7, whereby the ink is cured and fixed, and on the recording surface of the recording medium 7. An image is recorded.

  At this time, the temperature sensor 28 detects the temperature of the base part 20 of the low-pressure mercury lamp 17 at any time. Based on the detected temperature, the Peltier module 23 is controlled by the control part 29 so that the base part 20 is 40 ° C. It is adjusted to become. Thereby, ultraviolet rays are always emitted with the best luminous efficiency, and a stable amount of ultraviolet rays is applied to the ink that has landed on the recording medium 7.

  Specifically, when the temperature of the base part 20 detected by the temperature sensor 28 is higher than 40 ° C., the power supply part and the cooling fan 25 are controlled by the control part 29, and the heat conduction part contact surface of the Peltier module 23. As a result, the heat of the base part 20 is absorbed via the heat conduction part 22 and the heat conduction grease, and is dissipated from the heat sink 24 and is dissipated by the cooling fan 25. Thereby, the temperature of the nozzle | cap | die part 20 falls.

  On the other hand, when the temperature of the base part 20 detected by the temperature sensor 28 is lower than 40 ° C., the power source part is controlled by the control part 29, and heat is radiated from the heat conduction part contact surface of the Peltier module 23, Heat is transmitted to the base part 20 through the conductive part 22 and the thermal conductive grease. Thereby, the temperature of the base part 20 rises.

  As described above, according to the ink jet recording apparatus 1, since the light emission efficiency can be maintained in a good state and the ink can be cured with high-output ultraviolet light stably, a good image can be stably obtained.

  Further, between the base part 20 and the Peltier module 23, there is provided a heat conduction part 22 for transferring heat between the base part 20 and the Peltier module 23, and the base part 20 and the heat conduction part 22 are formed of aluminum. In addition, since the heat conduction grease that conducts heat is applied to the contact portion between the heat conduction part 22 and the Peltier module 23 and the base part 20, the temperature of the base part 20 can be easily set while preventing weight. Can be adjusted.

  Further, since the heat insulating portion 27 is provided between the cover member 16 and the bottom plate 26 and the heat conducting portion 22, heat transfer between the base housing portion 21 and the outside is prevented, and the temperature of the base portion 20 is efficiently increased. Can be adjusted.

  In this embodiment, the temperature sensor 28 detects the temperature of the base portion 20 of the low-pressure mercury lamp 17, and the control unit 29 controls the Peltier module 23 based on the detected temperature, so that the base portion 20 Although the adjustment is made so as to be the predetermined temperature, other methods may be adopted as long as the temperature of the base part 20 can be maintained at the predetermined temperature.

  For example, instead of using the temperature sensor 28, an ultraviolet sensor is provided as a light amount detecting means for detecting the amount of ultraviolet light within the irradiation range of the low-pressure mercury lamp 17, and the control unit 29 is based on the amount of ultraviolet light detected by the ultraviolet sensor. Thus, the Peltier module 23 may be controlled. The ultraviolet sensor includes, for example, a filter that transmits only ultraviolet light and a photoelectric conversion element that photoelectrically converts the ultraviolet light transmitted through the filter according to its intensity.

  As described above, since the light emission efficiency of the low-pressure mercury lamp 17 is highly temperature-dependent, it is considered that a temperature change occurs particularly in the base portion 20 of the low-pressure mercury lamp 17 when the amount of detected ultraviolet light varies. good. Therefore, from the start of lighting of the low-pressure mercury lamp 17 until the amount of ultraviolet light exceeds the peak, the control unit 29 causes a direct current to flow through the Peltier element in a direction in which the heat conduction unit contact surface of the Peltier module 23 becomes the heating surface. When the power supply unit is controlled and the UV light intensity exceeds the peak, the power supply unit is controlled so that a direct current flows through the Peltier element in the direction in which the heat conduction unit contact surface of the Peltier module 23 becomes the cooling surface, and cooling is performed. The fan 25 may be driven to rotate. After that, it is preferable to control the power supply unit so as to reverse the direction of the current flowing through the Peltier element every time the amount of ultraviolet light exceeds the peak.

1 is a perspective view illustrating a configuration of an embodiment of an ink jet recording apparatus according to the present invention. FIG. 2A is a perspective view showing a carriage and an ultraviolet irradiation device provided in the ink jet recording apparatus of FIG. FIG. 2B is a bottom view of the carriage and the ultraviolet irradiation device of the ink jet recording apparatus shown in FIG. It is sectional drawing which shows the periphery structure of the nozzle | cap | die storage part of the inkjet recording device of FIG. It is a block diagram which shows the structure of the inkjet recording device of FIG. It is a diagram which shows the relationship between the temperature of a nozzle | cap | die part, and luminous efficiency.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inkjet recording device 7 Recording medium 8 Recording head 15 Ultraviolet irradiation device (light irradiation device)
16 Cover member 17 Low-pressure mercury lamp (light source)
20 base part 21 base storage part 22 heat conduction part 23 Peltier module 27 heat insulation part 28 temperature sensor (temperature detection means)
29 Control unit

Claims (11)

A recording head formed with a nozzle that discharges ink that is cured by irradiating light to a recording medium; and a light irradiation device that includes a light source that emits light that discharges at the base and cures the ink. An ink jet recording apparatus that records an image by irradiating light from the light irradiation apparatus to the ink ejected from the recording head and landing on the recording medium to cure the ink,
A Peltier module for cooling or heating the base part;
An ink jet recording apparatus comprising: a control unit configured to control heat transfer by the Peltier module so that the temperature of the base unit becomes a predetermined temperature. Providing a temperature detecting means for detecting the temperature of the base part;
2. The ink jet recording apparatus according to claim 1, wherein the control unit controls heat transfer by the Peltier module based on the temperature of the base unit detected by the temperature detecting unit.   3. The ink jet recording apparatus according to claim 1, wherein the control unit controls heat transfer by the Peltier module so that a temperature of the base unit is within 40 ± 5 ° C. 4. The light source is a low-pressure mercury lamp;
3. The ink jet recording apparatus according to claim 1, wherein the control unit controls heat transfer by the Peltier module so that a temperature of the base unit is 40 ° C. 4. A light amount detecting means for detecting the light amount of light emitted from the light irradiation device is provided,
The ink jet recording apparatus according to claim 1, wherein the control unit controls heat transfer by the Peltier module according to the light amount detected by the light amount detection unit.   The ink jet recording apparatus according to claim 1, wherein the base portion is made of aluminum.   The heat conduction part which performs heat transfer between the base part and the Peltier module is provided between the base part and the Peltier module. The inkjet recording apparatus according to Item.   The inkjet recording apparatus according to claim 7, wherein the heat conducting portion is formed of aluminum.   9. The ink jet recording apparatus according to claim 7, wherein heat conduction grease for conducting heat is applied to a contact portion between the heat conduction portion and the Peltier module and the base portion.   The heat insulating part formed of a heat insulating material and preventing heat transfer between the base storing part and the outside is provided in the base storing part in which the base part is stored. The inkjet recording apparatus according to Item.   The ink jet recording apparatus according to claim 1, wherein the ink is a cationic polymerization ink containing a cationic polymerizable compound.

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