JP5770299B2 - Inkjet recording device - Google Patents

Description

  The present invention relates to an ink jet recording apparatus in which an image is recorded on a cloth by a recording unit including a drop-on-demand type and a line type ink jet head, and the cloth on which the image is recorded is dried by a drying unit. .

  Techniques related to ink jet recording have been proposed. Patent Document 1 discloses a printing apparatus. The printing apparatus includes an introduction unit, a conveyance unit, a printing unit, a preliminary drying unit, a drying unit, a shake-off unit, and the like. The introduction part is a part that introduces a roll or a cloth housed in a box into a predetermined position of the conveyance part while performing wrinkle stretching. The conveyance unit is a portion that is arranged adjacent to the introduction unit and conveys the introduced fabric to the print unit side by the conveyance belt. The print part is a part for drawing a pattern, a character, or the like on the cloth by a continuous ink jet method. The print unit has a plurality of lines of heads that are opposed to each other in the direction perpendicular to the transport direction more than the width of the fabric and correspond to the number of colors of ink to be used. The print unit may be an on-demand ink jet system. The preliminary drying part is a part that dries at least 20% or more of the evaporation component in the ink from the fabric subjected to the printing process by a heater or the like. The drying part is a part that further evaporates, for example, 85% or more of the evaporation component in the ink from the fabric dried in the preliminary drying part. In the printing apparatus, automatic adjustment is performed so that the ink droplets adhere to an appropriate position. The automatic adjustment is performed by drawing a test pattern on a film, reading the test pattern with a CCD camera, performing image processing, and feedback-controlling the operation of each line head using the image processed information as various control information.

Japanese Patent Laid-Open No. 9-240022

It should be noted that an inkjet recording apparatus that records an image on a fabric is different from an image recording on a paper or the like. One of them is a decrease in quality after recording an image. Therefore, in an inkjet recording apparatus for a fabric, a drying unit that dries the fabric (ink on the fabric) is provided continuously to a recording unit that records an image on the fabric.

  When a drying unit is provided near the recording unit, drying of the nozzles formed on the ink jet head included in the recording unit may be a problem. That is, the nozzle is easily dried under the influence of elements (heat, dehumidification, etc.) for drying the fabric. According to an ink jet recording apparatus having a recording unit including a drop-on-demand type and a line type ink jet head, a suitable image can be recorded at high speed. However, when the nozzles are dried, the nozzles are clogged with ink, and stable ink ejection is hindered, and this function may not be exhibited. Therefore, drying of the nozzle is one problem to be solved in the above-described inkjet recording apparatus in order to record an image on a fabric at a high speed and maintain the quality of the recorded image. .

  SUMMARY OF THE INVENTION An object of the present invention is to provide an ink jet recording apparatus having a recording unit including a drop on demand type and a line type ink jet head capable of recording a high-quality image at high speed on a fabric. To do.

An ink jet recording apparatus according to one aspect of the present invention is an ink jet recording apparatus that transports a fabric, discharges ink onto the transported fabric, and records an image on the fabric, and transports the fabric in the first direction. And nozzles that are drop-on-demand type and that eject ink onto the fabric conveyed by the conveyance unit are arranged in a range equal to or greater than the width of the fabric in the second direction intersecting the first direction. A plurality of line-type inkjet heads arranged in the first direction, a drying unit that dries a fabric on which an image is recorded in the recording unit, and air for blowing out humidified air. from the air outlet, wherein comprises a humidifying unit for supplying humidified air against the ink jet head, and a heating unit for heating the ink jet head, the humidifier, the air outlet is a plurality formed A plurality of supply parts arranged between the inkjet heads arranged in the first direction, and the first air outlet of the plurality of air outlets has a blowing direction of humidified air to the supply part. On the other hand, in the state that becomes the upstream side of the first direction and the side of the inkjet head, formed in the supply unit, the second air outlet of the plurality of air outlets, the blowing direction of the humidified air, wherein in a state where the side of the ink jet head on the downstream side of the first direction with respect to the supply part, is formed in the supply unit, the heating unit, that is built into the ink jet head. In this ink jet recording apparatus, the nozzles can be suitably humidified, and ink clogging associated with drying of the nozzles can be suppressed. The nozzle can be efficiently humidified. The ink jet head can be suitably heated. It is possible to suppress the occurrence of a state in which the inkjet head is condensed due to humidification. Therefore, an ink jet recording apparatus including a recording unit including a drop-on-demand type and a line type ink jet head capable of recording a high-quality image at high speed on the fabric can be provided.

This ink jet recording apparatus can also be configured as follows. You may make it provide the shielding part which shields the flow of the air from the said drying part to the said recording part side. According to this, the influence of the drying unit on the recording unit can be suppressed. In this case, the shielding unit may cover and accommodate the recording unit. According to this, the influence of the drying unit on the recording unit can be further suppressed. In addition, the recording unit may be provided with a shielding unit that accommodates the recording unit, and the humidification unit may supply humid air to an internal space of the shielding unit in which the recording unit is accommodated. According to this, by making the internal space filled with the humidified air, it is possible to supply the humidified air to the inkjet head and to further suppress the influence of the drying unit on the recording unit. Furthermore, you may make it provide the air-conditioning part which air-conditions the internal space of the said shielding part in which the said recording part was accommodated. According to this, the internal space of the shielding part in which the recording part is accommodated can be an environment suitable for humidification. As the humidification occurs, the ink-jet head is likely to condense, but the occurrence of this dew condensation can be suppressed.

  The cloth has an elongated shape, and includes an introduction section that feeds the cloth toward the transport section, and the transport section transports the cloth fed from the introduction section in the first direction. Also good. According to this, in the inkjet recording apparatus which records an image continuously with respect to a long fabric, a suitable function as described above can be obtained.

  The fabric may be long and may include a collection unit that collects the fabric dried by the drying unit. According to this, in the ink jet recording apparatus that continuously records an image on a long fabric, the long fabric on which a suitable image is recorded can be collected.

  Any of the above-described inkjet recording apparatuses includes a storage unit that stores reference image data corresponding to a reference image, an imaging unit that captures an image recorded on a fabric by the recording unit, and an image that is captured by the imaging unit. When the captured image data corresponding to the captured image and the reference image data are compared with the image analysis unit, and the captured image data is not image data within a reference range predetermined for the reference image data, A recording control unit that controls to stop the ejection of ink from the inkjet head. According to this, ink clogging associated with the drying of the nozzles can be suitably found and dealt with. For example, it is possible to take measures such as resetting the supply of humidified air by the humidifying unit to a suitable state. In addition, in an inkjet recording apparatus provided with an air conditioning unit, it is possible to take measures such as resetting the air conditioning unit so that the temperature and humidity of the internal space by the air conditioning unit are in a suitable state.

It is a figure which shows an example of schematic structure of an inkjet recording device. It is a figure which shows an example of schematic structure of a recording part and a humidification part. It is an example of schematic structure of the supply part contained in a humidification part, Comprising: It is a Z direction arrow directional view of FIG. It is the MM sectional view taken on the line shown in FIG. It is a flowchart of a discharge determination process.

  Embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to the configurations described below, and various configurations can be employed in the same technical idea. For example, some of the configurations shown below may be omitted or replaced with other configurations. Other configurations may be included. The hatching shown in FIGS. 1 and 4 shows a cross section.

<Inkjet recording apparatus>
The ink jet recording apparatus 1 will be described with reference to FIGS. The ink jet recording apparatus 1 includes an introduction unit 10, a conveyance unit 20, a recording unit 40, a humidification unit 50, a shielding unit 60, an air conditioning unit 70, a drying unit 80, and a collection unit 90. The ink jet recording apparatus 1 is an ink jet recording apparatus for the fabric 3 among various recording media on which an image (pattern pattern) is recorded. That is, in the inkjet recording apparatus 1, ink is ejected to the fabric 3 in accordance with image data input from an external device such as a personal computer connected to the inkjet recording apparatus 1, and the image data input to the fabric 3 is supported. The recorded image is recorded. The fabric 3 includes fiber fabrics made of various materials. In the example illustrated in FIG. 1, the fabric 3 has a long shape with a predetermined width. The long fabric 3 is sequentially fed from the introduction unit 10 side to the collection unit 90 side. The feeding of the fabric 3 is realized by the plurality of feeding rollers 5 and the conveying unit 20 provided in the inkjet recording apparatus 1.

  The introduction unit 10 feeds the long fabric 3 and supplies it to the transport unit 20 via the plurality of feed rollers 5. The long fabric 3 is set in the introduction portion 10 while being accommodated in the introduction carriage 13. For example, the fabric 3 accommodated in the carriage 13 is folded alternately on the left and right. In the introduction part 10, the state of the fabric 3 is corrected, for example, wrinkles generated in the fabric 3 are stretched. The introduction unit 10 may include a centering roller and a position detection sensor. The centering roller adjusts the position in the width direction of the cloth 3 being fed out from the carriage 13. The position detection sensor detects at least one side portion of the fabric 3 passing through the centering roller. In the ink jet recording apparatus 1, it is monitored whether the side portion of the fabric 3 that has passed through the centering roller and whose position in the width direction has been adjusted is in a predetermined position in accordance with a detection signal from the position detection sensor. The fabric 3 that has passed through the centering roller is further supplied to the conveying unit 20 via the feed roller 5. The route of the fabric 3 in the introduction part 10 is appropriately set in consideration of various conditions.

  The transport unit 20 transports the fabric 3 supplied from the introduction unit 10 through the recording unit 40 to the drying unit 80 side. The transport unit 20 includes a pair of first roller 21 and second roller 23, and a transport belt 25. The first roller 21 is provided on the upstream side in the first direction from the recording unit 40. The first direction is a direction that coincides with the transport direction in which the fabric 3 is transported by the transport unit 20. The second roller 23 is provided downstream of the recording unit 40 in the first direction. The conveyor belt 25 is an endless belt having an annular shape, and is stretched around the first roller 21 and the second roller 23. For example, the second roller 23 on the downstream side in the first direction is rotated in a direction corresponding to the first direction by a driving force of a driving unit (not shown), so that the transport belt 25 is rotated in the same direction. . Based on FIG. 1, the second roller 23 rotates counterclockwise (see the arrow in the second roller 23). At this time, the first roller 21 on the upstream side in the first direction is driven to rotate.

  An adhesive portion is formed over the entire circumference of the conveyance surface 27 that is the surface of the conveyance belt 25. A pressure roller 30 is provided at the upstream end of the transport unit 20 in the first direction so as to face the transport surface 27 (adhesive unit). The pressing roller 30 presses the fabric 3 supplied from the introduction unit 10 against the conveyance surface 27 on which the adhesive unit is formed. The fabric 3 is fixed to the conveyance surface 27 by the adhesive portion, and is conveyed in the first direction in a fixed state. A peeling roller 32 is provided above the downstream end of the transport unit 20 in the first direction. The peeling roller 32 rotates in a direction corresponding to the first direction by a driving force of a driving unit (not shown). Based on FIG. 1, the peeling roller 32 rotates counterclockwise (see the arrow shown on the outer periphery of the peeling roller 32). The peeling roller 32 rotates in synchronization with the rotation of the transport belt 25 (second roller 23). The outer peripheral surface of the peeling roller 32 that is in contact with the fabric 3 is in a state in which a predetermined frictional force is generated with the fabric 3. When the peeling roller 32 rotates, the fabric 3 conveyed by the conveying unit 20 is pulled toward the peeling roller 32 side. As a result, the fabric 3 being conveyed in a state where an image is recorded is peeled from the adhesive portion at a predetermined position after passing through the imaging unit 100 described later.

  The recording unit 40 includes ink jet heads 41C, 41M, 41Y, and 41K as shown in FIG. Ink jet heads 41C, 41M, 41Y, and 41K are formed with nozzles that eject ink. The ink jet head 41C is an ink jet head that discharges cyan ink. The inkjet head 41M is an inkjet head that ejects magenta ink. The inkjet head 41Y is an inkjet head that discharges yellow ink. The ink jet head 41K is an ink jet head that discharges black ink. According to the recording unit 40 including the inkjet heads 41C, 41M, 41Y, and 41K, a full-color image can be recorded on the fabric 3 (applied to the fabric 3 shown on the downstream side in the first direction in FIG. 2). (See Mesh pattern).

  In the case of using light cyan, light magenta, light yellow, and / or clear light cyan, magenta, and yellow colors for image recording, the recording unit 40 uses an inkjet head that ejects ink of these colors, Includes each. The inkjet heads 41C, 41M, 41Y, and 41K all have the same configuration (when other colors are used, the same applies to inkjet heads that eject ink of other colors). In the present embodiment, the inkjet heads 41C, 41M, 41Y, and 41K are simply referred to as “inkjet heads 41” when they are not distinguished or collectively referred to.

  Various inks are used for image recording. For example, a water-based ink containing a colorant and an additive and using water as a medium is used. Examples of the colorant used in the ink include dyes such as reactive dyes, acid dyes, direct dyes, and disperse dyes. A pigment can also be used as a colorant. If necessary, a dispersant, an antifoaming agent, a penetrating agent, a deep dyeing agent, a pH adjusting agent, and the like may be added to the ink. In the ink jet recording apparatus 1, each color ink is stored in an ink tank (not shown) for the corresponding color ink, and is supplied to each color ink jet head 41 via each color ink supply line.

  As shown in FIG. 2, the inkjet heads 41C, 41M, 41Y, and 41K are arranged in the first direction. The arrangement order is set as appropriate. For example, in the recording unit 40 illustrated in FIG. 2, the inkjet head 41K, the inkjet head 41C, the inkjet head 41M, and the inkjet head 41Y are arranged in this order from the upstream side in the first direction. The inkjet head 41 is provided so as to cross the fabric 3 in the width direction of the fabric 3. The ink jet head 41 is a drop-on-demand ink jet head. In the drop-on-demand type inkjet head 41, the fabric 3 is conveyed by the conveyance unit 20, and ink is ejected from the nozzles formed on the inkjet head 41 at the timing of recording an image. There are two types of ink ejection methods for the drop-on-demand type inkjet head 41: a piezo method and a thermal method. The inkjet head 41 is also a line-type inkjet head in which nozzles that eject ink to the fabric 3 conveyed by the conveyance unit 20 are arranged in a range equal to or larger than the width of the fabric 3 in the second direction. The second direction is a direction that intersects, specifically, is orthogonal to the first direction that coincides with the conveyance direction of the fabric 3 and coincides with the width direction of the fabric 3.

  The humidifying unit 50 supplies humidified air to the inkjet head 41. According to the humidified air supplied from the humidifying unit 50, drying of the nozzles formed on the inkjet head 41 can be suppressed. As shown in FIG. 2, the humidifying unit 50 includes a humidifying main body 51 and a plurality of supply units 55. The humidification main body 51 and the plurality of supply units 55 are connected by a supply flow path 53. The humidification main body 51 is a generation source that generates humidified air. As the humidifying body 51, various types of humidifiers such as an ultrasonic type, a steam type, or a vaporization type can be adopted. The supply flow channel 53 is a flow channel for flowing the humid air generated in the humidification main body 51 to each of the plurality of supply units 55. The supply unit 55 is configured to supply humidified air that has reached the flow path 53 through the supply flow path 53 to the inkjet head 41. The plurality of supply units 55 are provided between the inkjet heads 41 in the first direction, upstream in the first direction of the inkjet head 41K, and downstream in the first direction of the inkjet head 41Y. The plurality of supply units 55 have the same configuration.

  As shown in FIGS. 3 and 4, a plurality of air outlets 57 that penetrate the outer periphery of the supply unit 55 are formed in the supply unit 55. Humidified air that has passed through the supply channel 53 and reached the internal space 59 (see FIG. 4) of the supply unit 55 is blown out from the plurality of outlets 57. The blower outlet 57 is formed in the outer periphery of the supply part 55 used as the downward direction of a perpendicular direction in the state in which the supply part 55 was provided as shown in FIG. In such a region, the plurality of air outlets 57 are formed in a second direction, for example, in a zigzag shape (see FIG. 3). In the present embodiment, the air outlet 57 (see “air outlet 57” on the alternate long and short dash line “L1” shown in FIG. 3) formed side by side in the second direction at the upstream position in the first direction is referred to as “upstream”. It is referred to as “side outlet 57”. An outlet 57 (see “blower 57” on the alternate long and short dash line “L2” shown in FIG. 3) formed side by side in the second direction at a position downstream of the first direction is referred to as “downstream outlet 57. " The upstream outlet 57 and the downstream outlet 57 have the same angle θ in opposite directions with respect to the center line “L3” in the vertical direction (the Z direction is the direction above the vertical direction). Just open with an inclination.

  Therefore, humid air blows out from the upstream outlet 57 to the upstream side in the first direction. Humidified air from the upstream outlet 57 is supplied to the inkjet head 41 provided side by side on the upstream side of each supply unit 55. Humidified air blows out from the downstream outlet 57 to the downstream side in the first direction. Humidified air from the outlet 57 on the downstream side is supplied to the inkjet head 41 provided side by side on the downstream side of each supply unit 55. When the supply unit 55 is provided on the upstream side in the first direction of the inkjet head 41 </ b> K, the upstream air outlet 57 formed in the supply unit 55 may be omitted. When the supply unit 55 is provided on the downstream side in the first direction of the inkjet head 41Y, the downstream outlet 57 formed in the supply unit 55 may be omitted.

  The shielding part 60 is a box having an internal space 61 for covering and accommodating the recording part 40. Of the side walls 63 and 65 that intersect (orthogonal) the first direction of the shielding part 60, an opening 67 through which the fabric 3 supplied from the introduction part 10 can pass is formed in the side wall 63 on the upstream side in the first direction. Yes. On the downstream side wall 65 in the first direction, an opening 69 is formed through which the fabric 3 peeled from the adhesive portion of the transport belt 25 can pass by the peeling roller 32. The opening 69 formed in the side wall 65 is formed in a size (area) capable of suppressing the inflow of air at a position where the air flow from the drying unit 80 can be blocked.

  The air conditioning unit 70 air-conditions the internal space 61 of the shielding unit 60 in which the recording unit 40 is accommodated. The air conditioning unit 70 is configured by, for example, an air conditioner. According to the air conditioning unit 70, the temperature and humidity of the internal space 61 of the shielding unit 60 can be managed in a predetermined state. The air conditioning unit 70 is attached to the upper surface of the shielding unit 60, for example, as shown in FIG. The air conditioning unit 70 may be attached to any of the outer side walls of the shielding unit 60.

  The drying unit 80 includes a heater, a blower, and the like serving as a heat source, and dries the fabric 3 (ink on the fabric 3) on which an image is recorded and peeled from the adhesive portion of the transport belt 25. The fabric 3 is sent inside the drying unit 80 to the collection unit 90 side. The drying unit 80 may be configured by a drying mechanism such as a temporary drying unit and a main drying unit, and may dry the fabric 3 in two stages. Drying by the drying unit 80 may be performed by dehumidification in addition to drying by heat. In this case, the drying unit 80 includes a dehumidifying device.

  The collection unit 90 collects the fabric 3 that has been dried by the drying unit 80. The collection unit 90 includes a shake-off unit 91. The swing-down unit 91 swings in the first direction and the opposite direction with the upper part in the vertical direction as a fulcrum at a drive unit (not shown) (the double arrow described in the vicinity of the swing-down unit 91 in FIG. 1). The fabric 3 sent from the drying unit 80 side is collected in a collection carriage 93. The elongate fabric 3 is accommodated in the cart 93 in a state of being folded alternately on the left and right as before supply. The fabric 3 collected by the collection unit 90 and accommodated in the carriage 93 is moved to the next step, for example, the color development step.

  In addition, the inkjet recording apparatus 1 includes an imaging unit 100, a control unit 110, and a storage unit 112. The imaging unit 100 is provided at a position downstream of the recording unit 40 in the first direction so as to be able to image the conveyance surface 27 side from above the conveyance unit 20. The imaging unit 100 captures an image recorded on the fabric 3 by the recording unit 40. The controller 110 includes, for example, a CPU, a ROM, and a RAM in terms of hardware. The control unit 110 controls various operations and processes executed by the inkjet recording apparatus 1. At that time, the CPU appropriately executes computer programs for various operations and processes stored in the ROM on the RAM. For example, the control unit 110 performs control so that ink of each color is ejected from each nozzle of the inkjet heads 41C, 41M, 41Y, and 41K in accordance with image data input from an external device. As a result, a predetermined image is recorded on the fabric 3 being transported by the transport unit 20. The control unit 110 controls the discharge determination process shown in FIG. The storage unit 112 stores various data. For example, reference image data corresponding to the reference image used in the ejection determination process is stored. The reference image (reference image data) serves as a determination reference for determining whether or not the image recorded on the fabric 3 is in a state where a predetermined quality is maintained.

<Discharge determination process>
The discharge determination process will be described with reference to FIG. The ejection determination process is executed at a predetermined timing when an image is recorded on the fabric 3 by the inkjet recording apparatus 1. For example, it is started when the image recording is started, and continuously executed while the image is being recorded. In addition, when adjustment before starting the image recording is started, an instruction instructing the start of the processing input by the operator of the inkjet recording apparatus 1 to the external apparatus is input to the inkjet recording apparatus 1. The control part 110 which started this process acquires the captured image data which imaged the image recorded on the fabric 3 by the recording part 40 (S10). At this time, the control unit 110 controls the imaging unit 100. The imaging unit 100 captures an image recorded on the fabric 3 being transported by the transport unit 20. Subsequently, the control unit 110 reads the reference image data from the storage unit 112 and acquires the reference image data (S12). Both the captured image data and the reference image data are stored in the RAM in the control unit 110.

  Next, the control unit 110 analyzes the captured image data and the reference image data stored in the RAM, and compares the two image data (S14). In S14, the previously proposed image analysis method is used. Subsequently, the control unit 110 determines whether the captured image data is image data within a reference range predetermined with respect to the reference image data (S16). For example, it is assumed that the nozzles formed on the inkjet head 41 are dried and ink is not ejected from the dried nozzles. In such a case, it is determined that the captured image data is not image data within the reference range with respect to the reference image data (S16: No). In this case, the control unit 110 performs control so as to stop ink ejection from the inkjet head 41 (S18). Thereafter, a maintenance operation is performed on the recording unit 40. In the maintenance operation, ink clogging is eliminated by forcibly ejecting ink from the nozzles formed on the inkjet head 41.

  When the nozzle is not dried and the ink is suitably ejected, it is determined that the captured image data is image data within the reference range with respect to the reference image data (S16: Yes). ). When determination of S16 is affirmed (S16: Yes) or when S18 is performed, the control part 110 complete | finishes a discharge determination process.

<Effect of this embodiment>
According to this embodiment, in order to dry the fabric 3 on which an image is recorded by the recording unit 40, the ink jet recording apparatus 1 in which the drying unit 80 is provided continuously to the recording unit 40 is formed on the inkjet head 41. Further, it is possible to suppress drying of the nozzles, and it is possible to suppress the occurrence of ink clogging. Therefore, the ink discharge from the drop-on-demand type and line type inkjet head 41 can be stabilized, and an image of suitable quality can be recorded on the long fabric 3.

<Modification>
This embodiment can also be performed as follows. The configuration of the modification shown below can be applied to other modifications as appropriate.

  (1) In the above, the case where an image is recorded on the long fabric 3 has been described as an example. The cloth 3 as the recording medium is not long, but may be cut to a size that allows the whole to be placed on the upstream side in the first direction of the transport unit 20. In the case where an image is recorded on the fabric having such a shape, in the inkjet recording apparatus 1, the introduction unit 10 and the collection unit 90 may be omitted. When recording an image, the fabric is placed on the upstream side in the first direction of the transport unit 20 and is transported to the recording unit 40 side by the transport unit 20. In the recording unit 40, an image is recorded on the fabric conveyed by the conveyance unit 20. The fabric on which the image is recorded passes through the recording unit 40 and is introduced into the drying unit 80. The fabric on which the image is recorded passes through the drying unit 80 and is then removed from the inkjet recording apparatus 1 by an operator or the like. The fabric is transported in a state where the outer peripheral portion is fixed by a predetermined frame or the like so as not to cause wrinkles or the like on the surface on which the image is recorded during transport by the transport unit 20. When the fabric fixed by the frame or the like passes through the recording unit 40 and reaches the downstream side of the conveyance unit 20, the conveyance unit 20 and the drying unit are arranged so that the fabric is smoothly introduced into the drying unit 80. The height of the portion 80 is adjusted. For example, the height of the conveyance surface 27 of the conveyance unit 20 and the height of the conveyance surface in the drying unit 80 are set to the same height.

  (2) In the above description, the configuration in which the long fabric 3 that is folded alternately on the left and right is fed out by the introduction unit 10 has been described as an example. The long fabric 3 may be wound in a coil shape. In this case, the introduction part includes a supply roller for feeding out the fabric 3 wound up in a coil shape. Regarding the collection of the fabric 3 dried by the drying unit 80, the collection unit 90 including the shake-off unit 91 is made to fold the fabric 3 alternately left and right. Also in this case, the fabric 3 dried in the drying unit 80 may be wound into a roll and collected. In this case, the collection unit does not include the swing-down unit 91 but includes a winding unit for winding the long fabric 3.

  (3) In the above, the supply unit 55 is provided between the inkjet heads 41, upstream in the first direction of the inkjet head 41K, and downstream in the first direction of the inkjet head 41Y (see FIG. 2), and the humidifying body The humidifying unit 50 that supplies the humidified air to the inkjet head 41 by blowing the humidified air from the air outlet 51 from the air outlet 57 formed in the supply unit 55 has been described as an example. Any of the plurality of supply units 55 provided at each position may be omitted. For example, the supply unit 55 provided on the upstream side in the first direction of the inkjet head 41K and / or the supply unit 55 provided on the downstream side in the first direction of the inkjet head 41Y may be omitted. When the supply unit 55 is provided at least at one of the upstream side in the first direction of the inkjet head 41K and the downstream side in the first direction of the inkjet head 41Y, the supply unit 55 provided between the inkjet heads 41 is , May be omitted.

  In addition, in the second direction, humidified air may be blown out toward the inkjet head 41 so as to supply the humidified air to the inkjet head 41. In this case, the supply part having the shape as shown in FIGS. 2 to 4 is provided so as to be parallel to the first direction. At that time, the air outlet is directed toward the ink jet head 41 in the second direction.

  Further, as with the air conditioning unit 70, the humidifying main body 51 may be attached to the outer surface of the shielding unit 60 and may be a humidifying unit having a configuration in which an air outlet is provided in an opening formed in the shielding unit 60. In this case, humidified air is supplied to the internal space 61 of the shielding part 60, and the internal space 61 will be in the state filled with humidified air. The humidified air is supplied to the inkjet head 41 so that the flow of the humidified air does not hinder the flying of the ink ejected from the nozzles formed on the inkjet head 41. For example, the supply direction and / or supply timing of the humidified air are set as appropriate. Regarding the supply timing of the humidified air, the control unit 110 controls the humidifying unit 50 so that the supply of the humidified air does not become excessive at the timing when the ink is discharged. As shown in FIG. 2, if the humidifying unit 50 includes a plurality of supply units 55, a valve mechanism such as an electromagnetic valve is provided in the middle of the supply flow path 53 to switch the supply unit 55 to which humidified air is supplied. Thus, the supply of humidified air may not be excessive.

  (4) In the above description, the shielding unit 60 covers and accommodates the recording unit 40, in other words, the shielding unit 60 has a box shape, and the recording unit 40 is accommodated in the internal space 61 of the shielding unit 60. As explained. The shielding part may have a curtain shape. The curtain-shaped shielding part (shielding curtain) is provided in the first direction at a position between the recording unit 40 and the drying unit 80, for example, at a position where the side wall 65 is provided. The curtain-like shielding part can also shield the air flow from the drying part 80 to the recording part 40 side.

  (5) A configuration may be adopted in which a heating unit is attached to the inkjet head 41. The heating unit is constituted by, for example, an electric heater. The heating unit is built in the inkjet head 41. In addition, an electric heater as a heating unit may be attached to the outer peripheral side surface of the inkjet head 41. By heating the inkjet head 41, the occurrence of condensation on the inkjet head 41 can be more suitably suppressed.

  (6) In the above description, the inkjet recording apparatus 1 including the humidifying unit 50 and the air conditioning unit 70 has been described as an example. The air conditioning unit 70 may be omitted. In this case, a countermeasure against dew condensation that occurs in the inkjet head 41 is performed by adjusting the amount of humidified air supplied from the humidifying unit 50 and / or the amount of moisture contained in the humidified air. In addition, when the inkjet head 41 contains a heating part, a countermeasure against dew condensation can also be performed by the heating part. In addition, the humidification part 50 can also be abbreviate | omitted. In this case, drying of the nozzles formed on the inkjet head 41 is performed by temperature and humidity management by the air conditioning unit 70.

DESCRIPTION OF SYMBOLS 1 Inkjet recording apparatus 3 Cloth 5 Feed roller 10 Introduction part 20 Conveyance part 21 1st roller 23 2nd roller 25 Conveyance belt 27 Conveyance surface 30 Pressing roller 32 Peeling roller 40 Recording part 41, 41C, 41M, 41Y, 41K Inkjet head 50 Humidification part 51 Humidification main body 53 Supply flow path 55 Supply part 57 Outlet 60 Shielding part 61 Internal space 63, 65 Side wall 67, 69 Opening 70 Air-conditioning part 80 Drying part 90 Recovery part 91 Shaking part 100 Imaging part 110 Control part 112 Storage Part

Claims (8)

An inkjet recording apparatus that conveys a fabric, discharges ink onto the conveyed fabric, and records an image on the fabric,
A transport unit for transporting the fabric in the first direction;
The drop-on-demand type nozzles that eject ink to the fabric conveyed by the conveyance unit are formed in a second direction intersecting the first direction and arranged in a range that is greater than the width of the fabric. A recording unit formed by arranging a plurality of line-type inkjet heads in the first direction;
A drying unit for drying the fabric on which the image is recorded in the recording unit;
A humidifying unit that supplies humidified air to the inkjet head from a blowout port for blowing out the humidified air;
A heating unit for heating the inkjet head ,
The humidifying unit is provided between the inkjet heads in which a plurality of supply units in which a plurality of the outlets are formed are arranged in the first direction,
The first air outlet of the plurality of air outlets is configured so that the supply direction of the humidified air is in the state where the ink jet head is on the upstream side of the first direction with respect to the supply unit. Formed into
The second air outlet of the plurality of air outlets is configured such that the supply direction of the humidified air is in a state where the ink jet head is on the downstream side of the first direction with respect to the supply portion. Formed into
The heating unit, that is built into the ink jet head, an ink jet recording apparatus. The inkjet recording apparatus according to claim 1, further comprising a shielding unit that shields an air flow from the drying unit toward the recording unit. The inkjet recording apparatus according to claim 2 , wherein the shielding unit covers and accommodates the recording unit. A shielding part for covering and accommodating the recording part;
The inkjet recording apparatus according to claim 1, wherein the humidifying unit supplies humidified air to an internal space of the shielding unit in which the recording unit is accommodated. Comprising an air conditioning unit for conditioning an interior space of the shield portion to which the recording unit is accommodated, the ink jet recording apparatus according to claim 3 or claim 4. The fabric has a long shape,
An introduction section for feeding the fabric to the transport section side;
The transport unit transports the fabric fed from the inlet section to the first direction, the ink jet recording apparatus according to claims 1 to 5. The fabric has a long shape,
Comprising a recovery unit for recovering the dried fabric at the drying section, the ink jet recording apparatus according to claims 1 to 6. A storage unit for storing reference image data corresponding to the reference image;
An imaging unit that captures an image recorded on the fabric by the recording unit;
An image analysis unit that compares captured image data corresponding to an image captured by the imaging unit and the reference image data;
A recording control unit that controls to stop the ejection of ink from the inkjet head when the captured image data is not image data within a predetermined reference range with respect to the reference image data. The ink jet recording apparatus according to any one of claims 1 to 7 .

Images