JP2009183868A - Fluid jetting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fluid jetting apparatus can preventing damages on a filter. <P>SOLUTION: The fluid jetting apparatus includes a jetting head for jetting a fluid obtained by dissolving or dispersing a photo-curable material to be cured by receiving first light irradiation in an organic solvent toward a medium, a first light source for irradiating the medium with the first light, a discharge mechanism for discharging the ambient gas around the jetting head and the first light source, a filter installed in a discharge path and adsorbing molecules of the organic solvent by the discharge mechanism, and a polymerization means installed in the filter to cause polymerization reaction among the adsorbed molecules of the organic solvent. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fluid ejecting apparatus.

  The ultraviolet curable ink has a preferable characteristic as a printing ink, in which the curing is very slow until it is irradiated with ultraviolet rays, and it is rapidly cured when irradiated with ultraviolet rays. In addition, since the solvent is not volatilized during curing, there is also an advantage that the environmental load is small.

  In addition, UV curable inks exhibit high adhesion to various media depending on the composition of the vehicle, and are chemically stable after curing, such as adhesion, chemical resistance, weather resistance, and friction resistance. And has excellent characteristics such as withstanding outdoor environments.

  For this reason, an image can be formed not only on a thin sheet-like medium such as paper, a resin film, or a metal foil, but also on an optical recording medium having a three-dimensional surface shape such as a label surface or a textile product.

  As a method for attaching the ultraviolet curable ink to the medium, there may be coating, printing, and the like, but use of an ink jet recording apparatus that can form an arbitrary image or pattern with high accuracy without a printing plate is expected. In addition, a structure in which main scanning for moving the recording head for ejecting ink and sub scanning for moving the medium in a direction crossing the main scanning direction is combined, so that a long or narrow nozzle is used. An image can be recorded in an arbitrary area even on a medium having a large area.

  Japanese Patent Application Laid-Open No. 2004-228561 describes that in an ink jet recording apparatus, an ink contains an ultraviolet curing agent, and the recording surface immediately after recording is irradiated with ultraviolet rays to improve the quick drying property of the recording surface. More specifically, in an inkjet printer, ultraviolet curable ink is used as the ink, and the ink attached to the medium is immediately cured and fixed by ultraviolet lamps installed at both ends of the recording head in the main scanning direction. It is described.

When the ultraviolet curable ink is jetted onto the medium, there is a problem that the solvent of the ultraviolet curable ink is scattered and mist is easily generated. For this reason, a configuration has been proposed in which an exhaust mechanism such as a fan is disposed, a filter is provided on the exhaust path of the fan, and the mist is adsorbed by the filter.
JP 2004-1555046 A

  However, the organic solvent constituting the mist is often in a monomer state, and the ignition temperature is low. For this reason, there is a possibility that the mist may be ignited by the heat generated by the ultraviolet lamp. In particular, in the filter that adsorbs mist, the molecules of the organic solvent may be ignited, and there is a possibility that the filter may be damaged by the ignition.

  In view of the circumstances described above, an object of the present invention is to provide a fluid ejecting apparatus capable of preventing damage to a filter.

  In order to solve the above-described problems, a fluid ejecting apparatus according to the present invention ejects a fluid, in which a photocurable material that is cured by irradiation with first light, is dissolved or dispersed in an organic solvent, toward a medium. A first light source that irradiates the first light toward the medium, an exhaust mechanism that exhausts the gas including the fluid droplets around the ejection head and around the first light source, and the exhaust mechanism And a filter for adsorbing the molecules of the organic solvent, and a polymerization means for causing a polymerization reaction between the molecules of the organic solvent adsorbed on the filter.

  According to the present invention, a filter for adsorbing organic solvent molecules is provided on the exhaust system path of the exhaust mechanism, and a polymerization means for causing a polymerization reaction between the organic solvent molecules adsorbed on the filter is provided. Therefore, the molecules of the organic solvent are polymerized in the filter to become a polymer. When the organic solvent molecule is polymerized, the ignition temperature becomes high, and it becomes difficult to ignite against the heat generated by the first light source. Thereby, it can prevent that the molecule | numerator of an organic solvent ignites in a filter, and can prevent the damage to a filter reliably.

The fluid ejecting apparatus includes a support drum that rotates while supporting the medium on a support surface, a plurality of guide shafts extending in parallel with a rotation axis direction of the support drum, and a first of the plurality of guide shafts. Guided by a guide shaft and reciprocally moved along the support surface. The first carriage on which the ejection head is mounted and the second guide shaft among the plurality of guide shafts are guided along the support surface. And a second carriage on which the light source is mounted.
In the present invention, in the configuration having the support drum that rotates while supporting the medium on the support surface, the polymerization means is provided. In the configuration having the support drum, the mist easily spreads as the support drum rotates, and a lot of mist is easily adsorbed to the filter. According to the present invention, in a filter that adsorbs more mist, molecules of the organic solvent constituting the mist can be polymerized to be polymerized. Thereby, it can prevent reliably damaging a filter.

In the fluid ejecting apparatus, the polymerization means is a polymerization initiator provided on the surface of the filter and inside the filter to start a polymerization reaction between molecules of the organic solvent.
According to the present invention, since the polymerization means is a polymerization initiator provided on the surface of the filter and inside the filter to initiate the polymerization reaction between the molecules of the organic solvent, the molecules of the organic solvent are the surfaces of the filter. And it polymerizes inside the filter and polymerizes. Thereby, the molecules of the organic solvent can be effectively polymerized.

In the fluid ejecting apparatus, the organic solvent includes a molecule that starts a polymerization reaction when irradiated with the second light, and the polymerization unit is a second light source that emits the second light toward the filter. It is characterized by that.
According to the present invention, the organic solvent includes a molecule that initiates a polymerization reaction when irradiated with the second light, and the polymerization means is a second light source that emits the second light toward the filter. In the second light irradiation region of the filter, the organic solvent molecules are polymerized by the second light irradiation. Thereby, the molecules of the organic solvent can be effectively polymerized.

The fluid ejecting apparatus includes a plurality of the filters.
According to the present invention, since a plurality of filters are provided, different polymerization means can be provided for each filter. For example, it is possible to design such that some of the plurality of filters are provided with a polymerization initiator as a polymerization means, and other filters are provided with a second light source as the polymerization means. As described above, according to the present invention, the design range of the fluid ejecting apparatus is widened.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
FIG. 1 is a perspective view schematically showing a schematic structure of an ink jet recording apparatus 100 according to an embodiment of the present invention.

  As shown in the figure, an ink jet recording apparatus (fluid ejecting apparatus) 100 includes a recording unit 120 provided between a pair of upright frames 130 so as to be parallel to each other, a sheet feeding unit 112, and a sheet discharging unit. And a paper supply / discharge unit 110 including 114. As shown in the figure, the paper supply / discharge unit 110 and the recording unit 120 are provided close to each other. The ink jet recording apparatus 100 includes an exhaust mechanism 50 and a filter 52.

The recording unit 120 includes a support drum 140 supported between a pair of frames 130 and guide shafts 132, 134, 136, and 138.
The support drum 140 has a rotation shaft 142 that is pivotally supported by the frame 130. The support drum 140 rotates about the rotation shaft 142 in the direction of arrow R shown in FIG. The rotation of the support drum 140 is controlled by a drum driving unit (not shown). The surface of the support drum 140 is a support surface 144 that supports the recording paper (medium) 150, and is rotatable with the recording paper 150 held on the support surface 144.

  The recording unit carriage 170 is a housing on which the recording head 180 is mounted, and is provided so as to be close to the support surface 144 of the support drum 140. The recording unit carriage 170 is provided with two through holes along the direction of the rotation shaft 142 of the support drum 140. Of the four guide shafts 132, 134, 136, and 138 that are parallel to each other, the two guide shafts 132 and 134 are provided so as to penetrate the through holes of the recording unit carriage 170, respectively. The recording unit carriage 170 is supported by the guide shafts 132 and 134 in this through hole. The recording unit carriage 170 is provided with a driving mechanism (not shown), and is movable in the axial direction of the guide shaft while being supported by the guide shafts 132 and 134 by the driving mechanism. When the recording unit carriage 170 moves in the axial direction of the guide shaft, the recording head 180 is conveyed in the same direction.

  The irradiation unit carriage 160 is a housing on which the ultraviolet irradiation unit (first light source) 162 is mounted, and is provided along the support surface 144 of the support drum 140. The irradiation unit carriage 160 is provided with two through holes along the direction of the rotation shaft 142 of the support drum 140. Of the four guide shafts, the remaining two guide shafts 136 and 138 are provided so as to penetrate the through holes of the irradiation unit carriage 160, respectively. The irradiation unit carriage 160 is supported by the guide shafts 136 and 138 in the through holes. Further, the irradiation unit carriage 160 is provided with a drive mechanism (not shown), and is movably provided in the axial direction of the guide shaft while being supported by the guide shafts 136 and 138 by the drive mechanism. As the irradiation unit carriage 160 moves in the axial direction of the guide shaft, the ultraviolet irradiation unit 162 is conveyed in the same direction.

  The sheet feeding unit 112 stores a plurality of stacked sheet-like recording sheets 150 and supplies the recording sheets 150 one by one toward the support drum 140. The recording paper 150 supplied toward the support drum 140 is wound around the support surface 144 of the support drum 140 and rotates together with the support drum 140.

  The recording head 180 mounted on the recording unit carriage 170 discharges and adheres ultraviolet curable ink to the recording paper 150 held on the rotating support drum 140. The ultraviolet irradiation unit 162 mounted on the irradiation unit carriage 160 irradiates the ultraviolet curable ink attached to the recording paper 150 with ultraviolet rays to cure the ultraviolet curable ink. The cured ultraviolet curable ink is fixed on the surface of the recording paper 150 as an image.

  When the support drum 140 is rotated once, when an image is recorded on the recording paper 150 in a partial region in the longitudinal direction of the support drum 140 with respect to the recording summary 150, the recording unit carriage 170 moves along the guide shafts 132 and 134. A similar recording operation is performed on an area adjacent to the area.

  Thereafter, an operation is performed in which the recording unit carriage 170 moves each time the support drum 140 makes one rotation or more while the recording head 180 performs a recording operation, whereby an image is formed on the entire surface of the recording sheet 150.

  In other words, in the ink jet recording apparatus 100, the rotation direction of the support drum 140 is the main scanning direction, and the moving direction of the recording unit carriage 170 is the sub-scanning direction. In other words, the moving direction of the carriage is the main scanning direction, and this is different from many recording apparatuses in which the conveyance direction of the recording paper 150 matches the sub-scanning direction of the carriage.

  The irradiation unit carriage 160 that conveys the ultraviolet irradiation unit 162 moves in accordance with the movement of the recording unit carriage 170 and irradiates the ultraviolet curable ink immediately after being ejected from the recording head 180 onto the recording paper 150 with ultraviolet rays. To do.

  Preferably, the peak of load on the power supply unit of the inkjet recording apparatus 100 is reduced by slightly shifting the timing of starting movement of the irradiation unit carriage 160 and the recording unit carriage 170.

  That is, when the irradiation unit carriage 160 and the recording unit carriage 170 are integrated, the inertial mass to be accelerated when the movement of the carriage is started is remarkably increased, so that the load on the driving mechanism is remarkably increased. Further, in order to stably accelerate and decelerate a large mass, a frame 130 having a high strength and a large weight is required. Therefore, the structure that separates the irradiation unit carriage 160 and the recording unit carriage 170 reduces the capacity of the power supply device, thereby reducing the scale of the device and reducing the cost.

  The recording paper 150 on which the image is recorded in this manner is peeled off from the support drum 140 and sent to the paper discharge unit 114 to be accumulated.

FIG. 2 is a cross-sectional view showing the structure of the recording unit 120.
In the recording unit 120, the recording unit carriage 170 is supported by the pair of guide shafts 132 and 134 and includes an ink tank 174 to support the recording head 180.

  The ink tank 174 holds a predetermined amount of ink supplied from an ink cartridge (not shown) and stably supplies a fixed amount of ink to the recording head 180.

  The recording head 180 is disposed to face the recording paper 150 held on the support surface 144 of the support drum 140 and ejects ink toward the recording paper 150.

  The ultraviolet irradiation unit 162 includes a plurality of lamp units 161 aligned along the rotation direction of the support drum 140. Thus, a plurality of lamp units 161 are arranged along the rotational movement direction of the recording paper 150 that moves according to the rotation of the support drum 140. Therefore, even when the output of each lamp unit 161 is small, a sufficient amount of ultraviolet irradiation can be obtained while the recording paper 150 rotates.

  In such a recording unit 120, the recording paper 150 to which the ink ejected from the recording head 180 adheres rotates in the direction indicated by the arrow R in the drawing as the support drum 140 rotates.

  The ultraviolet irradiation unit 162 supported by the irradiation unit carriage 160 is disposed on the downstream side of the recording head 180 in the rotation direction. Accordingly, the ultraviolet curable ink discharged from the recording head 180 and attached to the recording paper 150 is immediately irradiated with ultraviolet rays and cured.

FIG. 3 is a perspective view showing a recording unit carriage 170 on which the recording head 180 is mounted.
The recording unit carriage 170 includes a carriage body 172 including a pair of horizontal through holes 176 through which the guide shafts 132 and 134 are inserted, and an ink tank 174. The recording head 180 is mounted on the upper surface of the carriage body 172.

FIG. 4 is a front view showing the recording head 180 as seen from the direction indicated by the arrow F in FIG.
The recording head 180 includes five head units (ejection heads) 181, 182, 183, 184, and 185. Each of the head units 181 to 185 is adapted to eject different types of ink. Specifically, for example, each of white W, magenta M, yellow Y, cyan C, and clear CR ink is ejected from one of the head units 181 to 185.

  In each of the head units 181 to 185, nozzle plates 191 to 195 are arranged on the surface facing the support drum 140. In each of the nozzle plates 191 to 195, nozzle holes for discharging ultraviolet curable ink are formed in a row. Specifically, two nozzle rows L1 and L2 are formed on each nozzle plate 191 to 195, and each nozzle row L1 and L2 is formed from, for example, 180 nozzles N (# 1 to # 180). The

  The drive structure for ejecting ink from the head units 181 to 185 includes various methods such as a method of sucking ink droplets by electrostatic force or the like, and a method of ejecting ink using a crystal resonator, a piezoelectric element, or the like. It is already known and can be appropriately selected according to the application.

FIG. 5 is a perspective view showing the ultraviolet irradiation unit 162 mounted on the irradiation unit carriage 160.
The ultraviolet irradiation unit 162 includes a plurality of lamp units 161, 163, 165, 167, and 169 mounted on a common irradiation unit frame 164. The lamp units 161 to 169 are arranged in five rows corresponding to the head units 181 to 185 of the recording head 180 while a plurality of lamp units 161 to 169 are aligned in the longitudinal direction.

  The width of the individual irradiation ranges of the lamp units 161 to 169 is preferably wider than the individual recording widths of the head units 181 to 185. Thereby, even when the timing of movement of the irradiation unit carriage 160 and the recording unit carriage 170 is shifted, a sufficient irradiation amount of ultraviolet rays can be applied to the ultraviolet curable ink attached to the recording paper 150.

  Examples of the lamp units 161 to 169 include metal halide lamps, xenon lamps, carbon arc lamps, chemical lamps, low-pressure mercury lamps, and high-pressure mercury lamps. More specifically, commercially available products such as H lamp, D lamp, and V lamp manufactured by Fusion System can be used.

  Furthermore, a lamp unit can be formed using LEDs that emit light in the ultraviolet band. In addition, since the lamp units 161 to 169 inevitably generate heat, it is preferable to provide a facility for forcibly cooling the lamp units 161 to 169 in addition to providing a heat radiating portion.

  The ultraviolet curable ink is prepared by adding an auxiliary agent such as an antifoaming agent or a polymerization inhibitor to a mixture of a vehicle, a photopolymerization initiator and a pigment, and is dissolved or dispersed in an organic solvent. ing. The vehicle is prepared by adjusting the viscosity of an oligomer, monomer or the like having photopolymerization curability with a reactive diluent. Therefore, the solvent is not volatilized for the purpose of curing the ink.

  As the vehicle, monofunctional or polyfunctional polymerizable compounds can be used. More specifically, oligomers (prepolymers) such as polyester acrylate, epoxy acrylate, and urethane acrylate can be exemplified, and these materials can also be used as a reactive diluent for adjusting the viscosity as an ink.

  As the photopolymerization initiator, benzophenone series, benzoin series, acetophenone series, and thioxanthone series are widely used. More specifically, 4-benzoyl-N, N, N-trimethyl benzene methanenannium chloride, 2-hydroxy 3- (4-benzoyl-phenoxy) -N, N, N-trimethyl 1-propylene benzene l -N, N-dimethyl N- [2- (1-oxo-2-propenyloxy) ethyl] A quaternary ammonium salt-type water-soluble organic substance such as benzene methanol bromide can be used.

  This type of photopolymerization initiator has different ultraviolet absorption characteristics, reaction initiation efficiency, yellowing, and the like depending on its composition, so that it is properly used depending on the color of the ink.

  As the polymerization inhibitor, any compound that has radical scavenging ability and inhibits radical polymerization can be used. However, in consideration of ejection suitability and the like in the ink jet recording apparatus, at least one compound selected from hydroquinones, catechols, hindered amines, phenols, phenothiazines, and condensed aromatic ring quinones is preferable.

  Examples of hydroquinones include hydroquinone, hydroquinone monomethyl ether, 1-o-2,3,5-trimethylhydroquinone, 2-tert-butylhydroquinone and the like. Examples of catechols include catechol, 4-methylcatechol, 4-tert-butylcatechol and the like. Examples of hindered amines include compounds having a tetramethylpiperidinyl group.

  Examples of phenols include phenol, butylhydroxytoluene, butylhydroxyanisole, pyrogallol, gallic acid, gallic acid alkyl ester, and the like. Examples of phenothiazines include phenothiazine. Examples of the condensed aromatic ring quinones include naphthoquinone and the like.

  Further, the polymerization inhibitor may be carbon black or inorganic / organic fine particles having a polymerization-inhibiting functional group introduced on the surface. Examples of the polymerization-preventing functional group include a hydroxyphenyl group, a dihydroxyphenyl group, a tetramethylpiperidinyl group, and a condensed aromatic ring.

  Returning to FIG. 2, the exhaust mechanism 50 and the filter 52 provided in the ink jet recording apparatus 100 will be described. The exhaust mechanism 50 is provided with an exhaust fan 51 and a control mechanism (not shown) that controls the rotation of the exhaust fan 51. The exhaust fan 51 is provided in the ink jet recording apparatus 100 at a position in contact with the outside of the apparatus. By rotating the exhaust fan 51, the atmosphere inside the ink jet recording apparatus 100, in particular, the atmosphere around the recording unit carriage 170 and the irradiation unit carriage 180 is discharged to the outside along a discharge path as indicated by broken line arrows in the drawing. It is like that.

  The filter 52 is provided in the ink jet recording apparatus 100 at a position on the exhaust path of the exhaust mechanism 50, for example, a position close to the inside of the exhaust fan 51. When ink is ejected onto the recording paper 150 by the head units 181 to 185, for example, an organic solvent or the like out of the ink becomes mist and scatters in the atmosphere. The filter 52 adsorbs the organic solvent in the atmosphere moved on the exhaust path by the exhaust fan 51 so that the exhausted atmosphere does not contain the organic solvent. The surface and the inside of the filter 52 contain a polymerization initiator 53 that polymerizes molecules of the organic solvent.

As the polymerization initiator 53 contained in the filter 52, for example, a chemically amplified photoresist, a compound used for photocationic polymerization, or the like is used (Organic Materials Research Group, “Organic Materials for Imaging”, Bunshin Publishing (1993). Year), pages 187-192). Specifically, diazonium, ammonium, iodonium, sulfonium, aromatic _B of onium compounds _(C 6 _F ⁵⁾ _4, such as phosphonium ^{_{-, PF 6 -, AsF 6}} -, SbF 6 -, CF 3 SO 3 - salt Can be mentioned. Moreover, the sulfonated substance which generate | occur | produces a sulfonic acid, the halide which photogenerates a hydrogen halide, an iron allene complex, etc. are mentioned. The polymerization initiator contained in the filter 52 causes the molecules of the organic solvent adhering to the filter 52 to polymerize by causing a polymerization reaction.

  According to the present embodiment, the filter 52 for adsorbing organic solvent molecules is provided on the exhaust system path of the exhaust mechanism 50, and a polymerization reaction occurs between the adsorbed organic solvent molecules in the filter 52. Since the polymerization initiator 53 is provided, the molecules of the organic solvent are polymerized in the filter 52 to become a polymer. When the organic solvent molecules are polymerized, the ignition temperature becomes high, and it is difficult to ignite the heat generated by the ultraviolet irradiation unit 162. Thereby, it can prevent that the molecule | numerator of an organic solvent ignites in the filter 52, and can prevent the damage to the filter 52 reliably.

  In this embodiment, the support drum 140 that rotates while supporting the recording paper 150 on the support surface 144 is provided with a filter 52 containing a polymerization initiator. In the configuration having the support drum 140, the mist easily spreads with the rotation of the support drum 140, and a lot of mist is easily adsorbed to the filter 52. According to this embodiment, in the filter 52 that adsorbs more mist, the molecules of the organic solvent constituting the mist can be polymerized to be polymerized. Thereby, it is possible to reliably prevent the filter 52 from being damaged.

  Further, according to the present embodiment, since the polymerization initiator for initiating the polymerization reaction between the molecules of the organic solvent is provided on the surface of the filter 52 and inside the filter 52, the molecules of the organic solvent are Polymerization can be performed by polymerizing the surface of the filter 52 and the inside of the filter 52. Thus, the molecules of the organic solvent can be effectively polymerized.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the present embodiment, since the configuration of the filter is different from that of the first embodiment, the difference will be mainly described. Further, the same components as those in the first embodiment are denoted by the same reference numerals as those in the first embodiment, and the description thereof is simplified or omitted.

FIG. 6 is a cross-sectional view showing a schematic configuration of the recording unit 220 in the ink jet recording apparatus 200 according to the present embodiment, and corresponds to FIG. 2 in the first embodiment.
As shown in the figure, in the recording unit 220 of the zinc jet recording apparatus 200, the recording unit carriage 170 is provided close to the support drum 140 and supported by a pair of guide shafts 132 and 134. The recording unit carriage 170 includes an ink tank 174 and supports the recording head 180. The irradiation unit carriage 160 is equipped with an ultraviolet irradiation unit 162 and is provided along the support surface 144 of the support drum 140.

  The ink jet recording apparatus 200 is provided with an exhaust mechanism 250 and a filter 252. The exhaust mechanism 250 is provided with an exhaust fan 251 and a control mechanism (not shown) that controls the rotation of the exhaust fan 251. The exhaust fan 251 is provided in the ink jet recording apparatus 200 at a position in contact with the outside of the apparatus. As the exhaust fan 251 rotates, the atmosphere inside the ink jet recording apparatus 200, particularly around the recording unit carriage 170 and the irradiation unit carriage 180, is discharged to the outside along a discharge path as indicated by broken line arrows in the drawing. It is like that.

  The filter 252 is provided in the ink jet recording apparatus 200 at a position on the exhaust path of the exhaust mechanism 250, for example, a position close to the inside of the exhaust fan 251. The filter 252 adsorbs the organic solvent in the atmosphere moved on the exhaust path by the exhaust fan 251 so that the exhausted atmosphere does not contain the organic solvent. A polymerization lamp (second light source) 253 for irradiating the surface of the filter 252 with ultraviolet light L is provided in the vicinity of the filter 252. The superposition lamp 253 includes a light source 253 a that emits ultraviolet light and a reflector 253 b that reflects the ultraviolet light from the light source 253 toward the filter 252.

  The organic solvent may contain a material that causes a polymerization reaction between molecules by irradiation of ultraviolet rays, or may contain a polymerization initiator. Light from the polymerization lamp 253 is applied to the surface 252a of the filter 252 where the molecules of the organic solvent are adsorbed. By the irradiation of the ultraviolet rays, a polymerization reaction is caused between the molecules of the organic solvent, and the molecules of the organic solvent are polymerized.

  According to the present embodiment, the organic solvent contains molecules that start a polymerization reaction when irradiated with ultraviolet rays, and the polymerization light source 253 that emits ultraviolet rays toward the filter 252 is provided. Among them, in the irradiation region of the ultraviolet ray L, the molecules of the organic solvent are polymerized by the irradiation of the ultraviolet ray. Thereby, the molecules of the organic solvent can be effectively polymerized.

  According to such a configuration, since it is a polymerization light source that emits the ultraviolet rays toward the filter 252, in the ultraviolet irradiation region of the filter 252, the organic solvent molecules are polymerized by the ultraviolet irradiation. It will be. Thereby, the molecules of the organic solvent can be effectively polymerized.

The technical scope of the present invention is not limited to the above-described embodiment, and appropriate modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, only one filter 52, 252 is arranged for one support drum 140. However, the present invention is not limited to this, and as shown in FIG. , 252 may be arranged. Although FIG. 7 shows an example in which two filters 52 and 252 are provided, a configuration in which three or more filters 52 and 252 are provided may be used. Further, FIG. 7 shows an example in which the filters 52 are doubled along the exhaust path. However, if the filters 52 are on the exhaust path, for example, positions 52A and 52B indicated by alternate long and short dash lines in the figure. It does not have to be doubled.

  Moreover, when arrange | positioning a some filter, you may apply any structure of the structure which includes a polymerization initiator and the structure which irradiates an ultraviolet-ray about each of the several filters 52 and 252. FIG. In the configuration shown in FIG. 7, one of the two filters may include a polymerization initiator and the other filter may be irradiated with ultraviolet rays.

  In the second embodiment, the position where the filter 252 is irradiated is the upstream surface 252a of the exhaust path. However, the present invention is not limited to this. For example, the filter 252 is separated from the exhaust mechanism 250. The arrangement may be such that ultraviolet light is irradiated to the downstream surface of the exhaust path with respect to the filter 252.

  In each of the above embodiments, the drum type (cylindrical) support member supports the medium, and the drum type ink jet recording apparatus that performs recording while rotating the support member is described as an example. The present invention is not limited to this, and the present invention can be applied to other configurations as long as it is an inkjet recording apparatus that records using ultraviolet curable ink.

  In the first embodiment, the configuration in which the polymerization initiator 53 is included in the filter 52 is described, and in the second embodiment, the configuration in which the filter 252 is irradiated with ultraviolet rays is described as an example. A combined structure, that is, a structure in which a polymerization initiator is included in one filter and the filter is irradiated with ultraviolet rays may be used.

  In the above embodiment, the atmosphere containing mist passes through the filters 52 and 252 as it is. However, the present invention is not limited to this. For example, after removing a certain amount of mist from the atmosphere containing mist in advance. You may comprise so that the filters 52 and 252 may pass.

1 is a diagram illustrating a configuration of an ink jet recording apparatus according to a first embodiment of the present invention. The figure which shows the cross-section of a recording part. FIG. 3 is a perspective view illustrating a recording unit carriage. The front view of a recording head (arrow F of FIG. 3). The perspective view which shows an ultraviolet irradiation part. The figure which shows the cross-section of the inkjet recording device which concerns on 2nd Embodiment of this invention. FIG. 4 is a diagram showing another configuration of the ink jet recording apparatus of the present invention.

Explanation of symbols

  50, 250 ... Exhaust mechanism 51, 251 ... Exhaust fan 52, 252 ... Filter 100 ... Inkjet recording device (fluid ejecting device) 150 ... Recording paper (medium) 162 ... Ultraviolet irradiation unit (first light source) 181 to 185 ... Head Unit (jet head) 253... Polymerization lamp (second light source)

Claims (5)

An ejection head that ejects a fluid, which is obtained by dissolving or dispersing a photocurable material that is cured by receiving the first light, in an organic solvent, toward the medium;
A first light source that irradiates the first light toward the medium;
An exhaust mechanism for exhausting a gas including droplets of the fluid around the ejection head and around the first light source;
A filter provided on an exhaust path by the exhaust mechanism to adsorb molecules of the organic solvent;
A fluid ejecting apparatus comprising: a polymerization unit that causes a polymerization reaction between molecules of the organic solvent adsorbed on the filter. A support drum that rotates while supporting the medium on a support surface;
A plurality of guide shafts extending in parallel with the rotation axis direction of the support drum;
A first carriage that is guided by a first guide shaft among the plurality of guide shafts and is reciprocally movable along the support surface, and on which the ejection head is mounted;
2. A second carriage that is guided by a second guide shaft among the plurality of guide shafts and is provided so as to be reciprocally movable along the support surface, and further mounted with the light source. Fluid ejection device. The polymerization means includes
The fluid ejecting apparatus according to claim 1, wherein the fluid ejecting apparatus is a polymerization initiator provided on a surface of the filter and inside the filter to start a polymerization reaction between molecules of the organic solvent. The organic solvent includes a molecule that initiates a polymerization reaction upon irradiation with the second light,
4. The fluid ejecting apparatus according to claim 1, wherein the superimposing unit is a second light source that emits the second light toward the filter. 5. The fluid ejecting apparatus according to claim 1, wherein a plurality of the filters are provided.

Images