WO2018061746A1 - Inkjet recording device - Google Patents

Abstract

An inkjet recording device (10) includes a conveying unit (20), inkjet heads (30K, 30M, 30Y, 30C), a carriage (40), an image capturing unit (70), and an illumination unit (80). The image capturing unit (70) is provided on the upstream side of the inkjet heads (30K, 30M, 30Y, 30C) in the conveyance direction. The image capturing unit (70) captures the image of the surface of the recording medium conveyed by the conveying unit (20). The illumination unit (80) is provided on the upstream side of the inkjet heads (30K, 30M, 30Y, 30C) in the conveyance direction. The illumination unit (80) illuminates an image capture range (R1) of the image capturing unit (70) with predetermined light.

Description

Inkjet recording device

The present invention relates to an ink jet recording apparatus.

Technology related to inkjet recording devices has been proposed. For example, Patent Document 1 discloses an ink jet printer. In the ink jet printer, the carriage is provided in a state in which the carriage can reciprocate in the main scanning direction. The carriage is provided with a recording head and an optical sensor. As the carriage moves on the paper, the paper edge is detected by the optical sensor. In the ink jet printer, the conveyance driving roller, the conveyance driven roller, the paper discharge driving roller, and the paper discharge driven roller are rotationally driven, and the paper is conveyed in the sub-scanning direction. The ink jet printer is provided with a paper detection sensor. The paper detection sensor detects the paper at a position upstream of the transport driving roller in the transport direction. In the ink jet printer, the skew direction and skew amount of the paper are obtained, and the first raster position and the final raster position of the print area are determined.

Patent Document 2 discloses a full-color ink jet recording apparatus. In the ink jet recording apparatus, rectangular tile-shaped dividing lines are formed on the fabric together with the image. Thereafter, the fabric is conveyed in a state where the front and back are reversed. Furthermore, the dividing line previously formed on the fabric is read by the optical area sensor. In the ink jet recording apparatus, the amount of distortion of the fabric that is turned upside down is determined, and a correction value is calculated. Subsequently, the shape correction process using the calculated correction value is executed for the next image area. The aforementioned image area is an image area corresponding to the detected recording position of the square tile dividing line area. Next, the region subjected to the shape correction process is reversed left and right. Further, the image is formed on the surface of the fabric opposite to the surface on which the image is formed.

Patent Document 3 discloses a method for producing a calami fabric having a three-dimensional pattern. In this manufacturing method, a blank paper is fixed in the traveling range of the print head of the inkjet dyeing machine, and a pattern is printed out on the blank paper. The blank paper on which the pattern is printed becomes the original drawing. The calami fabric is placed on the original drawing, and the calami fabric is fixed on the original drawing. At this time, the pattern of the blank paper matches the pattern of the calami fabric. In an ink jet dyeing machine, the printer head moves up, down, left, and right, and ejects ink droplets based on registered pattern information. Along with this, a print pattern matching the pattern is formed on all or part of the pattern of the calami fabric.

In addition, the applicant has proposed an ink jet recording apparatus shown in Patent Document 4. In the ink jet recording apparatus, an identification mark position detection sensor is disposed in the carriage in the vicinity of the ink jet recording head. The identification mark position detection sensor moves on the knitted fabric together with the ink jet recording head, and detects the position of the identification mark knitted on the knitted fabric. The identification marks are arranged in the main scanning direction corresponding to the plurality of patterns arranged in the main scanning direction. In the ink jet recording apparatus, the shift amount of each pattern in the sub-scanning direction is calculated based on the detection signal from the identification mark position detection sensor. Accordingly, the recording start position of each pattern image is adjusted.

JP 2008-221748 A Japanese Patent Laid-Open No. 11-315484 JP 2003-336146 A JP 2008-248437 A

In order to decorate the recording medium, a predetermined pattern may be recorded on the recording medium using an ink jet recording apparatus. According to the ink jet recording apparatus, a high-definition pattern can be recorded on a recording medium. Various recording media are used as recording media to be decorated. For example, a recording medium having a design on the surface on which a predetermined pattern is recorded is employed. Examples of the design applied to the surface of the recording medium include an uneven pattern or a hole pattern formed on the recording medium itself. When the recording medium has an uneven pattern or a hole pattern, such decoration of the recording medium may be performed in the following state. The aforementioned state is a state in which a specific area of the pattern is aligned with the uneven pattern or the hole pattern.

In the ink jet recording apparatus, the recording medium is placed on the transport surface of the transport unit during pattern recording. The recording medium may have low rigidity. In this case, the recording medium with low rigidity may be wrinkled or twisted in a state where the recording medium is placed on the conveyance surface. Therefore, in the ink jet recording apparatus, a tensile force may be applied to the recording medium placed on the transport surface. For example, when a recording medium having low rigidity and extending further has a design property, it is assumed that the elongation generated in the recording medium due to tension is not uniform. For example, in a recording medium on which a concavo-convex pattern is formed, a concave portion with a small thickness is easier to extend than a convex portion with a large thickness. Similarly, in a recording medium on which a hole pattern is formed, the periphery of the hole is easier to extend than the part separated from the hole. That is, when a tensile force is applied to the recording medium while the recording medium is placed on the transport surface, the next position on the recording medium may be displaced from the assumed position. The aforementioned position is a position of a specific part in the design applied to the recording medium. It is assumed that the above-described misregistration amount is different for each part of the recording medium. Therefore, the inventor detects the state of the recording medium before recording the pattern so that a specific area of the decorative pattern can be recorded on a specific design portion of the surface of the recording medium having design properties. We examined possible configurations.

It is an object of the present invention to provide an ink jet recording apparatus that can detect the state of a recording medium on which a decorative pattern is recorded.

One aspect of the present invention is a conveyance unit that conveys a recording medium, an inkjet head that includes a plurality of nozzles that eject ink to the recording medium that is conveyed by the conveyance unit, a carriage on which the inkjet head is mounted, An imaging unit that is provided upstream of the inkjet head in the conveyance direction in which the recording medium is conveyed by the conveyance unit, and that images the surface of the recording medium conveyed by the conveyance unit; and the conveyance direction from the inkjet head And an illuminating unit that illuminates the imaging range of the imaging unit with predetermined light.

According to this ink jet recording apparatus, the surface of the recording medium on which the pattern is recorded can be imaged before the pattern is recorded. The imaging range can be illuminated with predetermined light.

In the ink jet recording apparatus, the imaging unit may include an image sensor having sensitivity to infrared rays, and the illumination unit may irradiate infrared rays as the light and illuminate the imaging range with infrared rays. According to this configuration, a specific portion of the surface of the recording medium can be accurately detected from the captured image. For example, it is assumed that a mark as an index for detecting the state of the recording medium is formed in advance on the recording medium. In this case, the contour of the mark becomes clear in the captured image. Accordingly, the mark can be detected with high accuracy.

The inkjet recording apparatus relatively rotates the imaging unit and the illuminating unit, and a first imaginary straight line along an imaging direction by the imaging unit and a second along the irradiation direction of the light by the illuminating unit. You may make it provide the adjustment part which adjusts the angle which a virtual straight line makes. According to this configuration, the irradiation angle of light from the illumination unit can be adjusted according to the surface state of the recording medium. The imaging range by the imaging unit can be illuminated in a state suitable for imaging.

In the ink jet recording apparatus, the imaging unit is provided upstream of the ink jet head in the transport direction in a state where the first virtual straight line is perpendicular to a transport surface on which the recording medium is placed in the transport unit. The illumination unit is provided upstream of the inkjet head in the transport direction with the second virtual straight line tilted with respect to the first virtual straight line and tilted with respect to the transport surface. The illumination unit may be rotated to adjust the angle formed by the first virtual line and the second virtual line. According to this configuration, the imaging unit can be in a state of facing the surface of the recording medium. The surface of the recording medium can be imaged while illuminating the imaging range by the imaging unit in a state suitable for imaging.

The inkjet recording apparatus includes a moving unit that reciprocates the carriage in a main scanning direction orthogonal to the transport direction, and the carriage includes the adjustment unit and supports the imaging unit and the illumination unit. The imaging unit and the illumination unit may be supported by the support unit in a state of being aligned in the main scanning direction, and reciprocate in the main scanning direction together with the carriage. The inkjet recording apparatus includes a moving unit that reciprocates the carriage in a main scanning direction orthogonal to the transport direction, and the carriage includes a support unit that supports the imaging unit and the illumination unit. The imaging unit and the illumination unit may be supported by the support unit in a state of being aligned in the main scanning direction and reciprocate in the main scanning direction together with the carriage. According to this configuration, the imaging unit and the illumination unit can be moved in the same direction in accordance with the reciprocating movement of the carriage in the main scanning direction. The surface of the recording medium can be imaged by the imaging unit while being illuminated with light from the illumination unit.

In the inkjet recording apparatus, the imaging unit may include a line image sensor in which the imaging range is a direction along the transport direction. According to this configuration, each time the carriage is moved from one side to the other side in the main scanning direction, a predetermined area in the main scanning direction and the direction along the transport direction is imaged on the surface of the recording medium. be able to. The above-described area that can be imaged is, for example, an area corresponding to the length of the line image sensor in the direction along the transport direction and corresponding to the entire width of the recording medium in the main scanning direction.

According to the present invention, an ink jet recording apparatus capable of detecting the state of a recording medium on which a decorative pattern is recorded can be obtained.

It is a perspective view which shows an example of schematic structure of an inkjet recording device. It is a perspective view which shows an example of schematic structure of a support part. The state which the imaging part and the illumination part were supported by the support part is shown. The upper row is a captured image showing the experimental result of the first experiment. The upper left side shows a captured image captured in a state where the angle θ shown in FIG. The upper right side shows a captured image captured in a state where the angle θ is 80 ° and the infrared ray is irradiated. The lower row is a captured image showing the result of the second experiment. The lower left side shows a captured image captured in a state where the imaging direction is a direction from the upper side to the lower side in the vertical direction and infrared rays are irradiated. The lower right side shows a captured image captured in a state where the imaging direction is inclined in the vertical direction and the horizontal direction and irradiated with infrared rays. Each captured image shows a specific portion of the surface of the fabric as a recording medium. It is a captured image which shows the experimental result of 3rd experiment. The left side shows a captured image captured in a state where infrared rays are irradiated. The right side shows a captured image captured in a state where white light is irradiated. Each captured image shows a specific portion of the surface of the fabric as a recording medium. It is a perspective view which shows the other example of schematic structure of a support part. The state which the imaging part and the illumination part were supported by the support part is shown.

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.

<Inkjet recording apparatus>
The ink jet recording apparatus 10 will be described with reference to FIG. The ink jet recording apparatus 10 conveys a recording medium and records a predetermined pattern on the recording medium. The recording medium is formed of, for example, a material having low rigidity and extending. In the embodiment, a case where the recording medium is the fabric 15 will be described as an example. As described above, the fabric 15 has a characteristic that it is low in rigidity and easily stretches in the direction in which a force acts when tension is applied to the fabric 15. Furthermore, the fabric 15 has an uneven pattern on the surface. This uneven | corrugated pattern contains a rectangular-shaped convex part and a recessed part. The surface of the fabric 15 is the surface of the fabric 15 on which the pattern is recorded. In the embodiment, a plurality of marks 16 are formed on the surface of the fabric 15 on the first side and the second side in the main scanning direction at regular intervals in the transport direction. The plurality of marks 16 are formed by a woven structure or a knitted structure constituting the fabric 15. When the mark 16 is formed of a woven structure or a knitted structure, the mark 16 has a three-dimensional shape. In FIG. 1 and FIGS. 2 and 5 described later, the mark 16 is illustrated as a rhombus (square) shape. However, the position, formation method, or shape of the mark 16 may be different from the configuration described above. The position, formation method, or shape of the mark 16 is appropriately determined in consideration of various conditions. In each of the above-described drawings, the mark 16 is shown in a state where the inside is painted black. This is to make it easy to distinguish the mark 16 from the other parts shown in the above-described drawings. The main scanning direction and the conveyance direction will be described later. The ink colors used for pattern recording are black, magenta, yellow, and cyan. The ink color may be a color other than these. The number of ink colors may be 3 colors or less or 5 colors or more. The inkjet recording apparatus 10 includes a transport unit 20, inkjet heads 30 </ b> K, 30 </ b> M, 30 </ b> Y, and 30 </ b> C, a carriage 40, a moving unit 60, an imaging unit 70, an illumination unit 80, and a control device 90.

The transport unit 20 transports the fabric 15. In the embodiment, the direction in which the fabric 15 is transported by the transport unit 20 is referred to as “transport direction”. In the inkjet recording apparatus 10, the transport unit 20 transports the fabric 15 intermittently. The description regarding this point will be described later. The conveyance unit 20 is a belt conveyor. The transport unit 20 includes a pair of transport rollers 21 and 22, an endless belt 23, and a first motor 25. The transport roller 21 is provided downstream of the carriage 40 in the transport direction. The conveyance roller 22 is provided upstream of the carriage 40 in the conveyance direction. The endless belt 23 is an annular belt. The endless belt 23 is stretched around the transport rollers 21 and 22 in a state where tension is applied. In a state where the endless belt 23 is stretched over the transport rollers 21 and 22, the transport surface 24 is in a horizontal state between the transport rollers 21 and 22. The conveying surface 24 is formed by the outer peripheral surface of the endless belt 23. The fabric 15 is placed on the transport surface 24.

The first motor 25 is connected to the transport roller 21. As the first motor 25, for example, a servo motor having an encoder is employed. The first motor 25 rotates the transport roller 21 in a direction corresponding to the transport direction. The endless belt 23 rotates in a direction corresponding to the transport direction as the transport roller 21 rotates. The conveyance roller 22 is rotated in a direction corresponding to the conveyance direction following the rotation of the endless belt 23. In FIG. 1, an arrow shown inside the conveyance roller 21 indicates the rotation direction of the conveyance roller 21.

The ink jet recording apparatus 10 may include an adhesive portion, a pressing portion, and a peeling portion, similarly to a known ink jet recording device. The adhesive portion is provided on the entire conveyance surface 24 over the entire circumference. The pressing unit is provided at an upstream end of the transport unit 20 in the transport direction. The pressing unit presses the fabric 15 supplied to the transport unit 20 against the transport surface 24 provided with the adhesive unit. The transport unit 20 transports the fabric 15 in the transport direction in a state where the fabric 15 is fixed to the transport surface 24 by the adhesive unit. The peeling portion is provided downstream of the carriage 40 in the transport direction. The peeling unit peels the fabric 15 from the transport surface 24. In FIG. 1, illustration of the adhesive portion, the pressing portion, and the peeling portion is omitted. In the ink jet recording apparatus 10, the same adhesive part, pressing part, and peeling part as those of a known ink jet recording apparatus can be employed. Therefore, the other description regarding an adhesion part, a press part, and a peeling part is abbreviate | omitted.

The inkjet head 30K is an inkjet head that discharges black ink. The inkjet head 30M is an inkjet head that ejects magenta ink. The inkjet head 30Y is an inkjet head that discharges yellow ink. The inkjet head 30C is an inkjet head that discharges cyan ink. The inkjet heads 30K, 30M, 30Y, and 30C include a plurality of nozzles that eject ink of corresponding colors. According to the inkjet heads 30K, 30M, 30Y, and 30C, a full-color image can be recorded on the surface of the fabric 15. The image recorded on the surface of the fabric 15 becomes a decorative pattern. In FIG. 1, the pattern given to the portion of the fabric 15 illustrated on the downstream side in the transport direction from the ink jet heads 30 </ b> K, 30 </ b> M, 30 </ b> Y, and 30 </ b> C corresponds to the decorative pattern recorded on the surface of the fabric 15. The ink of each color is stored in an ink tank for each color, flows through the ink flow path for each color, and is supplied to the inkjet heads 30K, 30M, 30Y, and 30C. In FIG. 1, illustration of the nozzles, the ink tanks for each color, and the ink flow path is omitted.

The carriage 40 is mounted with inkjet heads 30K, 30M, 30Y, and 30C. On the carriage 40, the inkjet heads 30K, 30M, 30Y, and 30C are adjacent to each other in the main scanning direction. The main scanning direction coincides with the width direction of the endless belt 23 in which the conveying surface 24 is in a horizontal state and is orthogonal to the conveying direction. The arrangement order of the inkjet heads 30K, 30M, 30Y, and 30C in the main scanning direction may be different from that shown in FIG. These arrangement orders are appropriately determined in consideration of various conditions. In the embodiment, a portion of the carriage 40 on which the inkjet heads 30K, 30M, 30Y, and 30C are mounted is referred to as a “first base portion 41”. The carriage 40 includes a support portion 42 in addition to the first base portion 41. The support part 42 is provided on the upstream side in the transport direction from the first base part 41. In the carriage 40, the support portion 42 is fixed to the first base portion 41. The support unit 42 supports the imaging unit 70 and the illumination unit 80. The imaging unit 70 and the illumination unit 80 are supported above the transport surface 24 by the support unit 42 in a state of being aligned in the main scanning direction. The other description regarding the support part 42 is mentioned later.

The moving unit 60 reciprocates the carriage 40 in the main scanning direction. The moving unit 60 includes two pulleys 61 and 62, a timing belt 63, and a second motor 64. The pulley 61 is provided on the first side in the main scanning direction with the transport unit 20 as a reference. The pulley 62 is provided on the second side in the main scanning direction with the transport unit 20 as a reference. The pulley 62 is rotatably supported. The timing belt 63 is stretched around pulleys 61 and 62 in a state where tension is applied. The second motor 64 is connected to the pulley 61. The second motor 64 rotates the pulley 61. In FIG. 1, an arrow shown inside the pulley 61 indicates the rotation direction of the pulley 61. The carriage 40 is attached to the timing belt 63 via a stay 65.

The imaging unit 70 images the surface of the fabric 15 conveyed by the conveyance unit 20 from above the conveyance surface 24. The imaging unit 70 includes an image sensor 71. In the imaging unit 70, an image sensor having sensitivity to infrared rays is employed as the image sensor 71. In this case, the image sensor 71 has an image sensor that detects infrared rays. Further, the image sensor 71 is a line image sensor. The line image sensor is sometimes referred to as a linear image sensor or a one-dimensional image sensor. That is, the imaging unit 70 includes a line image sensor having sensitivity to infrared rays as the image sensor 71. In the embodiment, a range along the conveyance direction captured by one imaging (imaging for one scan) by the imaging unit 70 is referred to as “imaging range R1”. The imaging range R1 corresponds to the length of the image sensor 71 in the direction along the transport direction. In the direction along the transport direction, the imaging range R1 is a range wider than the next distance. The above-described distance is a conveyance amount for one time of the fabric 15 that is intermittently conveyed in the conveyance direction by the conveyance unit 20. In FIG. 1 and FIGS. 2 and 5 described later, the imaging range R1 is indicated by a two-dot chain line. In each of the above-described drawings, a portion shown for convenience showing the relationship between the imaging unit 70 and the imaging range R1 is indicated by a two-dot chain line.

The illumination unit 80 illuminates the imaging range R1 with predetermined light from above the transport surface 24. The irradiation light from the illumination unit 80 has a predetermined wavelength. In the embodiment, the range illuminated by the illumination unit 80 is referred to as “illumination range R2”. The illumination range R2 is a predetermined range including the imaging range R1 on the surface of the fabric 15. The illumination unit 80 includes a line illumination 81 that emits infrared rays. However, the illuminating device of the illuminating unit 80 may be an illuminating device that can emit infrared rays of a type different from that of the line illumination 81. In FIG. 1 and FIGS. 2 and 5 described later, the illumination range R2 is indicated by a two-dot chain line. In each of the above-described drawings, a portion shown for convenience showing the relationship between the illumination unit 80 and the illumination range R2 is indicated by a two-dot chain line. In addition, the broken lines indicating predetermined parts in the above-described drawings are hide lines. In each of these drawings, for example, the image sensor 71 and the line illumination 81 are indicated by a hidden line.

In the inkjet recording apparatus 10, the positional relationship between the inkjet heads 30K, 30M, 30Y, and 30C, the imaging unit 70, and the illumination unit 80 in the transport direction is as follows. That is, as described above, in the carriage 40, the support portion 42 is provided on the upstream side in the transport direction from the first base portion 41. Therefore, the imaging unit 70 and the illumination unit 80 are provided on the upstream side in the transport direction from the inkjet heads 30K, 30M, 30Y, and 30C.

The control device 90 includes a connection interface 91 and a control unit 92. In the embodiment, the connection interface 91 is described as “connection I / F 91”. For example, the first motor 25, the second motor 64, the imaging unit 70, and the illumination unit 80 are connected to the connection I / F 91. The detection signal output from the encoder of the first motor 25 is input to the control device 90 via the connection I / F 91. The detection signal output from the encoder of the second motor 64 is input to the control device 90 via the connection I / F 91. In the control device 90, the connection I / F 91 outputs detection signals from the encoders of the first motor 25 and the second motor 64 to the control unit 92. An imaging signal corresponding to the captured image captured by the imaging unit 70 is input to the control device 90 via the connection I / F 91. In the control device 90, the connection I / F 91 outputs an imaging signal from the imaging unit 70 to the control unit 92. In FIG. 1, the illustration of the electrical wiring that connects the first motor 25, the second motor 64, the imaging unit 70, the illumination unit 80, and the connection I / F 91 is omitted.

The control unit 92 includes, for example, a CPU, a storage unit, and a RAM. The CPU executes arithmetic processing. The storage unit is, for example, one or both of a nonvolatile memory and a hard disk. The storage unit stores programs for various operations executed by the inkjet recording apparatus 10. The RAM serves as a work area when the CPU executes the program stored in the storage unit. The control unit 92 controls various operations executed by the inkjet recording apparatus 10. For example, the control unit 92 controls the recording of the pattern on the fabric 15.

When a pattern is recorded on the fabric 15 by the inkjet recording apparatus 10, the moving unit 60 and the conveying unit 20 operate as follows. That is, in the moving unit 60, the second motor 64 connected to the pulley 61 reciprocates in the clockwise and counterclockwise directions. As the second motor 64 rotates, the pulley 61 rotates back and forth on both the left and right sides. When the pulley 61 rotates counterclockwise as the second motor 64 rotates in a predetermined direction, the timing belt 63 also rotates counterclockwise. The pulley 62 rotates following the timing belt 63 that rotates counterclockwise. Accordingly, the carriage 40 moves from the second side in the main scanning direction to the first side. When the carriage 40 reaches the first moving end in the main scanning direction, the rotation direction of the second motor 64 is reversed, and the pulley 61 rotates to the right. When the pulley 61 rotates to the right, the timing belt 63 also rotates to the right. The pulley 62 rotates following the timing belt 63 that rotates clockwise. Accordingly, the carriage 40 moves from the first side in the main scanning direction to the second side. When the carriage 40 reaches the second moving end in the main scanning direction, the rotation direction of the second motor 64 is reversed again, and the pulley 61 rotates left again.

The transport unit 20 transports the fabric 15 in the transport direction in correspondence with each movement of the next carriage 40. The above-described movements of the carriage 40 are movement of the carriage 40 from the second side to the first side in the main scanning direction and movement of the carriage 40 from the first side to the second side in the main scanning direction. That is, the conveyance of the fabric 15 by the conveyance unit 20 is performed intermittently according to each movement of the carriage 40 described above. The ink jet heads 30K, 30M, 30Y, and 30C eject inks of corresponding colors from the respective nozzles toward the fabric 15 at a predetermined timing when the carriage 40 moves in the main scanning direction. The inks of the respective colors ejected from the nozzles of the inkjet heads 30K, 30M, 30Y, and 30C land on the surface of the fabric 15. A pattern is recorded on the surface of the fabric 15 by the landed ink of each color.

The imaging unit 70 repeats imaging in the imaging range R1 while the carriage 40 moves between the first side and the second side in the main scanning direction in response to a command signal from the control unit 92. At that time, the illumination unit 80 starts irradiation of infrared rays according to a command signal from the control unit 92, and illuminates the illumination range R2. Accordingly, in the inkjet recording apparatus 10, the imaging unit 70 includes the surface of the fabric 15 every time the carriage 40 moves from the second side in the main scanning direction to the first side or from the first side to the second side. The next partial area is imaged. Along with this, imaging data corresponding to this area is generated. The partial area of the fabric 15 described above corresponds to the imaging range R1 in the direction along the conveyance direction, and corresponds to the entire width of the fabric 15 in the main scanning direction.

The control unit 92 executes image processing. This image processing is image processing in which the next imaging data and pattern data are processed. The above-described imaging data is image data generated by imaging by the imaging unit 70 described above. The pattern data described above is image data corresponding to the pattern recorded on the fabric 15. The pattern data is generated in advance using a predetermined application program. In this image processing, the control unit 92 detects a plurality of marks 16 included in the captured image from the captured image corresponding to the captured data. Subsequently, the control unit 92 specifies position information indicating each position of the detected plurality of marks 16. For example, the position information is indicated by a two-dimensional coordinate value based on the direction along the transport direction and the main scanning direction. The storage unit of the control unit 92 stores the next position information. The position information described above is position information indicating each position of the plurality of marks 16 in a state where the fabric 15 is not deformed. In other words, the above-described position information is design (theoretical) position information indicating each position of the plurality of marks 16 on the fabric 15. In the inkjet recording apparatus 10, an origin position serving as a reference for position information is set in advance. For example, the origin position is a two-dimensional coordinate value that indicates the position of the carriage 40 that has been moved to the first or second moving end in the main scanning direction.

Next, the control unit 92 transforms the pattern data in accordance with each position information of the specified plurality of marks 16 and each position information on the design of the plurality of marks 16 corresponding to the specified marks 16. For example, it is assumed that the cloth 15 is detected to have been extended by a first amount in the direction along the transport direction from the position information of each of the specified marks 16 and the position information on the design. In this case, the control unit 92 expands the data portion corresponding to the imaging data in the pattern data generated using the predetermined application program in the direction along the transport direction by an amount corresponding to the first amount. To do. In the ink jet recording apparatus 10, the control unit 92 controls the ejection of ink to the area of the fabric 15 corresponding to the imaging data to be processed according to the data portion of the pattern data after deformation.

<Supporting part>
The support part 42 is demonstrated with reference to FIG.1 and FIG.2. In FIG. 2 and FIG. 5 described later, hatching indicates a cross-sectioned portion. The support part 42 includes a second base part 43, a first column part 44, and an adjustment part 45. The second base portion 43 is provided integrally with the first base portion 41. In the carriage 40, the second base portion 43 is provided on the upstream side in the transport direction of the first base portion 41 and on the second side in the main scanning direction of the first base portion 41 (see FIG. 1). However, the second base portion 43 may be provided at a position different from the second side in the main scanning direction with respect to the first base portion 41. For example, the second base portion 43 may be provided at the center or the first side of the first base portion 41 in the main scanning direction. The arrangement of the second base portion 43 with respect to the first base portion 41 is appropriately determined in consideration of various conditions.

The first base portion 44 and the adjustment portion 45 are provided on the second base portion 43 (see FIG. 2). The first support column portion 44 is fixed to the upper surface of the second base portion 43 in the vertical direction. The imaging unit 70 is provided on the first support column 44 in the following state. The state described above is a state above the transport surface 24 and in which the imaging range R1 by the imaging unit 70 is in the direction along the transport direction. Furthermore, the imaging unit 70 is supported by the first support column 44 in a state in which the image sensor 71 faces the conveyance surface 24 that is a horizontal plane and the imaging direction is a direction from the upper side to the lower side in the vertical direction. The first support column 44 may include a first mechanism. The first mechanism is a mechanism that adjusts the position of the imaging unit 70 in the vertical direction. 1 and 2, the first mechanism is not shown.

The adjustment unit 45 relatively rotates the imaging unit 70 and the illumination unit 80 to adjust the angle θ formed by the first virtual line L1 and the second virtual line L2. The first virtual straight line L1 is a virtual straight line along the imaging direction by the imaging unit 70. Therefore, the first virtual straight line L1 is also a virtual straight line perpendicular to the transport surface 24. The second virtual straight line L2 is a virtual straight line along the direction of infrared irradiation by the illumination unit 80. The second virtual straight line L2 is also a virtual straight line that is inclined with respect to the first virtual straight line L1 and inclined with respect to the transport surface 24. In other words, the second virtual straight line L2 is a virtual straight line inclined with respect to the vertical direction and the horizontal direction. In the inkjet recording apparatus 10, the adjustment of the angle θ by the adjustment unit 45 is performed by rotating the illumination unit 80.

The adjustment unit 45 includes a holder unit 46, a first shaft 49, a rotating body 50, and a second shaft 53. The holder part 46 is fixed to the upper surface of the second base part 43 in the vertical direction. The first shaft 49 is attached to the holder portion 46 in a state where the downstream end portion in the transport direction is inserted into a through hole 47 formed in the holder portion 46. The rotating body 50 is fixed to the upstream end of the first shaft 49 in the transport direction. An illuminating unit 80 is attached to the rotating body 50 via the second shaft 53 at the end opposite to the first shaft 49 side.

In the adjustment part 45, the first shaft 49 inserted into the through hole 47 can be rotated by loosening the screw 48 screwed into the holder part 46. Along with the rotation of the first shaft 49, the rotating body 50 fixed to the first shaft 49 rotates. Accordingly, the illumination unit 80 connected to the rotating body 50 via the second shaft 53 rotates on the circumference around the center line L3. The center line L3 is a straight line that matches the center line (center axis) of the first shaft 49. In the adjustment unit 45, the screw 48 is tightened in a state where the illumination unit 80 is rotated and disposed at a predetermined position. By tightening the screw 48, the first shaft 49 is fixed to the holder part 46. Accordingly, the illumination unit 80 can be positioned at a predetermined position above the transport surface 24. The adjustment unit 45 may include a second mechanism. The second mechanism is provided in the rotating body 50, for example. The second mechanism is a mechanism that adjusts the position of the illumination unit 80 in the radial direction. The aforementioned radial direction is a direction that coincides with the radial direction of the first shaft 49 centered on the center line L3.

The adjustment unit 45 includes a third mechanism. The third mechanism is a mechanism that rotates the illumination unit 80 around the center line L4. The third mechanism has, for example, a structure in which a second shaft 53 connected to the illumination unit 80 is inserted into a through hole 51 formed in the rotating body 50. A screw hole leading to the through hole 51 is provided on the side surface of the rotating body 50. A screw 52 is screwed into this screw hole. The rotation of the illumination unit 80 accompanying the rotation of the second shaft 53 is restricted by bringing the tip of the screw 52 into contact with the outer peripheral surface of the second shaft 53. In this state, the illumination unit 80 illuminates the illumination range R2 from the above-described positioned position. Furthermore, the imaging unit 70 images the imaging range R1 illuminated by the illumination unit 80. The center line L4 is a straight line that coincides with the center line (center axis) of the second shaft 53 and is parallel to the center line L3. 1 and 2, the second mechanism is not shown. The arrow shown on the outer periphery of the center line L4 in FIG. 2 indicates the rotation direction of the illumination unit 80 by the third mechanism.

<Effect of embodiment>
According to the embodiment, the following effects can be obtained.

(1) In the inkjet recording apparatus 10, the imaging unit 70 and the illumination unit 80 are provided on the upstream side in the transport direction from the inkjet heads 30K, 30M, 30Y, and 30C (see FIG. 1). In the inkjet recording apparatus 10, the carriage 40 reciprocates in the main scanning direction as the moving unit 60 operates. The carriage 40 includes a support portion 42. The support unit 42 supports the imaging unit 70 and the illumination unit 80. The support unit 42 supports the imaging unit 70 in a state where the first virtual straight line L1 is perpendicular to the transport surface 24 (see FIG. 2). The support part 42 supports the illumination part 80 in a state where the second virtual straight line L2 is inclined with respect to the first virtual straight line L1 and is inclined with respect to the transport surface 24 (see FIG. 2). The support part 42 includes an adjustment part 45. The adjustment unit 45 adjusts an angle θ formed by the first virtual line L1 and the second virtual line L2.

Therefore, the imaging unit 70 and the illumination unit 80 can be moved in the same direction corresponding to the reciprocating movement of the carriage 40 in the main scanning direction. Before the pattern is recorded, the surface of the fabric 15 on which the pattern is recorded can be imaged. The imaging unit 70 can be in a state of facing the surface of the fabric 15. The imaging range R1 can be illuminated with infrared rays. The irradiation angle of infrared rays from the illumination unit 80 can be adjusted according to the surface state of the fabric 15. The surface of the fabric 15 can be imaged while illuminating the imaging range R1 in a state suitable for imaging. The aforementioned irradiation angle is an angle formed by the conveyance surface 24 (horizontal line in the main scanning direction) and the second virtual straight line L2.

The inventor conducted a first experiment for confirming the angle θ (see FIG. 2) and the state of the captured image. Through the first experiment, the inventor confirmed that the angle θ affects the state of the captured image (see the upper part of FIG. 3). The imaging direction was a direction from the upper side to the lower side in the vertical direction (see FIG. 2). Irradiation light was infrared. In the first experiment, the following events were observed. That is, when the angle θ is increased and the above-described irradiation angle is set to be almost horizontal (angle θ: 80 °, irradiation angle: 10 °), a shadow is generated in a three-dimensional portion that can be the mark 16 (FIG. 3). (See the upper right). As a result, as shown in the upper right side of FIG. 3, it was confirmed that the captured image is not suitable for detecting the three-dimensional shape. On the other hand, when the angle θ is reduced and the above-described irradiation angle is set to be close to the vertical state (angle θ: 10 °, irradiation angle: 80 °), generation of a shadow is recognized in a solid shape portion that can be the mark 16. (Refer to the upper left side of FIG. 3). As a result, as shown in the upper left of FIG. 3, the three-dimensional shape could be recognized in a suitable state. The captured images shown on the left and right sides in the upper part of FIG. 3 are images captured under the same conditions except for the angle θ and the irradiation angle. Although the detailed description is omitted, the inventor also conducted an experiment in which the irradiation light was white light with respect to the relationship between the angle θ and the state of the captured image. As a result, the inventor confirmed that the same result as that obtained when the irradiation light was infrared was obtained.

Furthermore, the inventor conducted a second experiment for confirming the imaging direction and the state of the captured image. Through the second experiment, the inventor confirmed that the imaging direction affects the state of the captured image (see the lower part of FIG. 3). The conveyance surface 24 was a horizontal plane. Irradiation light was infrared. In the second experiment, the following events were observed. That is, when the imaging direction is a direction inclined in the vertical direction and the horizontal direction (an angle formed by the conveyance surface 24 and the first virtual straight line L1: 20 °), it was confirmed that the contrast of the concave portion in the three-dimensional shape is low. (Refer to the lower right side of FIG. 3). It is considered that this is because the concave portion is hidden in the state described above, and the concave portion is difficult to be seen. On the other hand, when the imaging direction is a direction from the upper side to the lower side in the vertical direction (an angle formed by the conveyance surface 24 and the first virtual line L1: 90 °), a state in which the contrast of the concave portion becomes low is not recognized. (See the left side of the lower part of FIG. 3) As a result, as shown on the left side of the lower part of FIG. 3, the three-dimensional shape that can be the mark 16 was recognized in a suitable state. The captured images shown on the left and right sides in the lower part of FIG. 3 are images captured under the same conditions except for the angle θ and the irradiation angle.

(2) The imaging unit 70 includes an image sensor 71 (see FIG. 2). In the imaging unit 70, an image sensor having sensitivity to infrared rays is employed as the image sensor 71. An imaging range R1 by the imaging unit 70 is a direction along the transport direction. The illumination unit 80 includes a line illumination 81 that emits infrared rays, and illuminates the illumination range R2 with infrared rays.

Therefore, the movement of the carriage 40 in one direction such as the second side to the first side or the first side to the second side in the main scanning direction causes the surface of the fabric 15 to have a predetermined direction in the direction along the conveyance direction and the main scanning direction. Can be imaged. The above-described area where imaging can be performed corresponds to the imaging range R1 in the direction along the conveyance direction, and corresponds to the entire width of the fabric 15 in the main scanning direction. In the captured image, the outline of the mark 16 becomes clear. Accordingly, the mark 16 can be detected with high accuracy. As a result, it is possible to improve the accuracy of the position information of the mark 16.

This is clear, for example, from FIG. 4 showing the experimental results of the third experiment conducted by the inventor. That is, in the captured image (irradiation light: infrared light) shown on the left side of FIG. 4, the contrast of the three-dimensional edge portion that can be the mark 16 is higher than the captured image (irradiation light: white light) shown on the right side of FIG. As a result, in the captured image shown on the left side of FIG. 4, the outline of the three-dimensional shape could be clearly recognized. The captured images shown on the left and right sides of FIG. 4 are images captured under the same conditions except for irradiation light. The imaging direction is a direction from the upper side to the lower side in the vertical direction (see FIG. 2), and the angle θ is set to 10 °.

<Modification>
The embodiment can also be performed as follows. Some configurations of the modifications shown below can be appropriately combined and employed. Hereinafter, points different from the above will be described, and description of similar points will be omitted as appropriate.

(1) In the inkjet recording apparatus 10, the pattern is recorded on the fabric 15 while the carriage 40 is reciprocated in the main scanning direction by the moving unit 60 (see FIG. 1). As the ink jet recording apparatus, an apparatus of a type different from the ink jet recording apparatus 10 has been put into practical use. This different type of ink jet recording apparatus includes an ink jet head called a line type. In an ink jet recording apparatus including a line type ink jet head, the ink jet heads for the respective colors are mounted on a carriage portion corresponding to the first base portion 41 in a state of being adjacent to each other in the transport direction. In a line-type inkjet head, a plurality of nozzles are arranged in a direction orthogonal to the transport direction. The direction orthogonal to the transport direction is a direction corresponding to the main scanning direction described above. The direction orthogonal to the transport direction coincides with the width direction of the endless belt 23. In this description, the direction orthogonal to the transport direction is referred to as “orthogonal direction”. In an inkjet recording apparatus including a line-type inkjet head, the carriage does not move in the orthogonal direction. Accordingly, the moving unit 60 is omitted. The transport unit 20 continuously transports the fabric 15 in the transport direction.

The configuration of the embodiment in which the imaging unit 70 and the illumination unit 80 are provided upstream of the inkjet heads 30K, 30M, 30Y, and 30C in the transport direction can also be employed in an inkjet recording apparatus that includes a line-type inkjet head. In this case, the imaging unit 70 and the illumination unit 80 are provided on the upstream side in the transport direction with respect to the ink jet head provided on the most upstream side in the transport direction among the ink jet heads for each color. The imaging unit 70 is supported by the carriage support unit in a state where the imaging range R1 is in the orthogonal direction. The illumination unit 80 is supported by the support unit in a state in which the illumination unit 80 is aligned with the imaging unit 70 in the direction along the conveyance direction. The arrangement order of the imaging unit 70 and the illumination unit 80 in the transport direction is appropriately determined in consideration of various conditions. For example, the illumination unit 80 is provided on the upstream side in the transport direction from the imaging unit 70. The support unit includes an adjustment unit. The adjustment unit relatively rotates the imaging unit 70 and the illumination unit 80 to adjust the angle θ formed by the first virtual line L1 and the second virtual line L2. For example, the adjustment unit rotates the illumination unit 80 as described above. The irradiation angle of infrared rays from the illumination unit 80 can be adjusted according to the surface state of the fabric 15. The aforementioned irradiation angle is an angle formed by the conveyance surface 24 (horizontal line along the conveyance direction) and the second virtual straight line L2. The imaging direction is the direction from the upper side to the lower side in the vertical direction, as described above. The 1st virtual straight line L1 turns into a virtual straight line perpendicular | vertical to the conveyance surface 24 which is a horizontal surface.

In an inkjet recording apparatus including a line-type inkjet head, the carriage does not move in the orthogonal direction as described above. Therefore, the imaging range R1 by the imaging unit 70 is set to a range that is equal to or larger than the entire width of the fabric 15 in the orthogonal direction. In this case, the illumination range R2 by the illumination unit 80 is a predetermined range including the imaging range R1 in a range that is equal to or greater than the entire width of the fabric 15 in the orthogonal direction. It is assumed that the above-described imaging range R1 that is equal to or larger than the entire width of the fabric 15 cannot be captured by one image sensor 71. In this case, the imaging unit may be an imaging unit including a plurality of image sensors. The plurality of image sensors are arranged in a state of crossing the fabric 15 in the orthogonal direction. It is assumed that the above-described illumination range R2 that is equal to or greater than the entire width of the fabric 15 cannot be illuminated by one line illumination 81. In this case, the illumination unit may be an illumination unit including a plurality of line illuminations. The plurality of line illuminations are arranged in a state of crossing the fabric 15 in the orthogonal direction. An inkjet recording apparatus including a line-type inkjet head is a known inkjet recording apparatus. Therefore, the other description regarding an inkjet recording device provided with a line-type inkjet head is abbreviate | omitted. The inkjet recording apparatus 10 may also be an imaging unit including a plurality of image sensors and an illumination unit including a plurality of line illuminations. The plurality of image sensors and the plurality of line illuminations are arranged in a direction along the conveyance direction. When a plurality of image sensors are arranged in the direction along the conveyance direction or in the orthogonal direction, the imaging range R1 in the direction along the conveyance direction or the orthogonal direction captured by one imaging (imaging for one scan) is: This corresponds to the overall length of the plurality of image sensors in the direction along the conveyance direction or in the orthogonal direction.

(2) The adjustment unit 45 includes a holder unit 46, a first shaft 49, a rotating body 50, and a second shaft 53 (see FIG. 2). In the adjustment part 45, the first shaft 49 can be rotated by loosening the screw 48 of the holder part 46. Therefore, the adjusting unit 45 can rotate the rotating body 50. The illumination unit 80 rotates around the center line L3 as the rotating body 50 rotates. In the adjustment unit 45, the screw 48 is tightened in a state where the illumination unit 80 is rotated and disposed at a predetermined position. The illumination unit 80 is positioned at a predetermined position above the transport surface 24. Accordingly, the angle θ formed by the first virtual line L1 and the second virtual line L2 is adjusted.

The adjustment unit may have a configuration different from the above as long as the angle θ formed by the first virtual straight line L1 and the second virtual straight line L2 can be adjusted. For example, the adjustment unit may be configured by combining a fourth mechanism, a fifth mechanism, and a sixth mechanism. The fourth mechanism is a mechanism that moves the illumination unit 80 in the main scanning direction. The fifth mechanism is a mechanism that moves the illumination unit 80 in the vertical direction. The sixth mechanism is a mechanism that rotates the illumination unit 80 around the axis in the direction along the transport direction (see “center line L4” in FIG. 2), similarly to the third mechanism of the adjustment unit 45 described above. The illumination unit 80 can be moved to a predetermined position in a two-dimensional plane by the fourth mechanism whose moving direction is the main scanning direction and the fifth mechanism whose vertical direction is the vertical direction. The illumination mechanism 80 positioned by the fourth mechanism and the fifth mechanism can be rotated by the sixth mechanism to adjust the irradiation direction and the position of the illumination range R2. The illumination range R2 can be a range including the imaging range R1. The angle θ formed by the first virtual line L1 and the second virtual line L2 may be adjusted by rotating the imaging unit 70. In this case, the adjustment unit is provided on the imaging unit 70 side.

(3) The support part 42 includes an adjustment part 45 (see FIG. 2). In the support part 42, the adjustment part 45 may be omitted. In this case, the illumination part 80 is supported by the support part 42 as shown in FIG. 5, for example. In the description based on FIG. 5, in order to clarify the correspondence with the ink jet recording apparatus 10 illustrated in FIG. 1, common or corresponding parts are denoted by the symbols used above. FIG. 5 is a view shown in the same manner as FIG. The support part 42 shown in FIG. 5 includes a second base part 43, a first support part 44, a second shaft 53, and a second support part 54. The second strut portion 54 is provided with the illumination portion 80 in the following state. The state described above is a state in which the second imaginary straight line L2 is inclined with respect to the first imaginary straight line L1 above the transport surface 24 and by an angle θ at which the illumination range R2 overlaps the imaging range R1. In the support part 42 shown in FIG. 5, the angle θ formed by the first virtual line L1 and the second virtual line L2 is fixed to a predetermined value.

The support part 42 shown in FIG. 5 includes a mechanism for rotating the illumination part 80 around the center line L4, similarly to the third mechanism of the adjustment part 45 described above. That is, the second shaft 53 connected to the illumination unit 80 is inserted into the through hole 55 formed in the second support column 54. A screw hole leading to the through hole 55 is provided on the side surface of the second support column 54. A screw 56 is screwed into this screw hole. The rotation of the illumination unit 80 accompanying the rotation of the second shaft 53 is restricted by bringing the tip of the screw 56 into contact with the outer peripheral surface of the second shaft 53. Further, in the support portion 42 shown in FIG. 5, the first mechanism of the first support column portion 44 described above may be provided in the same manner as the support portion 42 shown in FIGS. 1 and 2. In addition, the support portion 42 shown in FIG. 5 may be provided with a mechanism corresponding to the second mechanism of the adjustment portion 45 described above, similarly to the support portion 42 shown in FIGS. 1 and 2. This mechanism adjusts the position of the illumination unit 80 in the direction corresponding to the radial direction described above, as in the second mechanism. In FIG. 5, as in FIGS. 1 and 2, illustration of mechanisms corresponding to the first mechanism and the second mechanism is omitted. An arrow shown on the outer periphery of the center line L4 in FIG.

(4) In the control device 90, the control unit 92 executes image processing on the imaging data and the pattern data as processing targets. This image processing may be executed in the same manner as described above by an external device connected to the control device 90 so as to be able to perform data communication. A personal computer is exemplified as the external device. Imaging data is input to the external device. The external device stores the positional information (designed positional information) of the plurality of marks 16 for the state in which the fabric 15 is not deformed in the storage unit of the control unit of the own device. In the external device, the control unit executes the image processing described above. That is, the control unit of the external device detects the first amount, for example, as the amount that the fabric 15 extends in the direction along the transport direction. Further, the control unit of the external device expands the data portion corresponding to the imaging data in the pattern data by an amount corresponding to the first amount in the direction along the transport direction. As described above, the pattern data is generated using a predetermined application program. The external device transmits the deformed pattern data to the control device 90. In the control device 90, the control unit 92 controls the pattern recording on the fabric 15 with the pattern data after deformation as a target. Accordingly, the inkjet heads 30K, 30M, 30Y, and 30C discharge ink of the corresponding colors from the respective nozzles toward the fabric 15 as described above.

DESCRIPTION OF SYMBOLS 10 Inkjet recording device, 15 cloth, 16 mark 20 conveyance part, 21 and 22 conveyance roller, 23 endless belt 24 conveyance surface, 25 1st motor 30K, 30M, 30Y, 30C inkjet head 40 carriage, 41 1st base part, 42 Support part 43 Second base part 44 First support part 45 Adjusting part 46 Holder part 47 Through hole 48 Screw 49 Screw 50 49 Rotating body 51 Through hole 52 Screw 53 Second shaft 54 Second Supporting part, 55 through hole, 56 screw, 60 moving part 61, 62 pulley, 63 timing belt, 64 second motor 65 stay, 70 imaging part, 71 image sensor 80 illumination part, 81 line illumination, 90 control device 91 connection interface (Connection I / F), 92 control unit L1 first virtual straight line, 2 Second imaginary straight line, L3, L4 centerline R1 imaging range, R2 illumination range, theta angle

Claims (7)

A transport unit for transporting the recording medium;
An inkjet head including a plurality of nozzles that eject ink onto the recording medium conveyed by the conveyance unit;
A carriage on which the inkjet head is mounted;
An imaging unit that is provided upstream of the inkjet head in the conveyance direction in which the recording medium is conveyed by the conveyance unit, and that images the surface of the recording medium conveyed by the conveyance unit;
An inkjet recording apparatus comprising: an illumination unit that is provided upstream of the inkjet head in the transport direction and illuminates an imaging range of the imaging unit with predetermined light. The imaging unit includes an image sensor having sensitivity to infrared rays,
The inkjet recording apparatus according to claim 1, wherein the illumination unit irradiates infrared rays as the light, and illuminates the imaging range with infrared rays. The imaging unit and the illumination unit are relatively rotated, and a first virtual line along the imaging direction by the imaging unit and a second virtual line along the irradiation direction of the light by the illumination unit, The inkjet recording apparatus according to claim 1, further comprising an adjustment unit that adjusts an angle formed. The imaging unit is provided upstream of the inkjet head in the transport direction, with the first virtual straight line being perpendicular to a transport surface on which the recording medium is placed in the transport unit,
The illumination unit is provided upstream of the inkjet head in the transport direction with the second virtual straight line tilted with respect to the first virtual straight line and tilted with respect to the transport surface.
The inkjet recording apparatus according to claim 3, wherein the adjustment unit rotates the illumination unit to adjust an angle formed by the first virtual line and the second virtual line. A moving unit that reciprocally moves the carriage in a main scanning direction orthogonal to the conveying direction;
The carriage includes the adjustment unit, and is provided with a support unit that supports the imaging unit and the illumination unit.
The imaging unit and the illumination unit are:
In a state aligned in the main scanning direction, supported by the support portion,
The ink jet recording apparatus according to claim 3, wherein the ink jet recording apparatus reciprocates in the main scanning direction together with the carriage. A moving unit that reciprocally moves the carriage in a main scanning direction orthogonal to the conveying direction;
The carriage is provided with a support unit that supports the imaging unit and the illumination unit,
The imaging unit and the illumination unit are:
In a state aligned in the main scanning direction, supported by the support portion,
The ink jet recording apparatus according to claim 1, wherein the ink jet recording apparatus reciprocates in the main scanning direction together with the carriage. The inkjet recording apparatus according to claim 5 or 6, wherein the imaging unit includes a line image sensor in which the imaging range is a direction along the transport direction.

Images