JP4900626B2 - Recording device - Google Patents

Description

  The present invention relates to a tray on which a thin plate-like body represented by an optical disk can be set. The present invention also relates to a recording apparatus configured to be able to transport a tray on which a thin plate-like body represented by an optical disk can be set.

  An ink jet printer as an example of a recording apparatus is configured to be able to record by directly ejecting ink droplets onto a label surface of an optical disk as a thin plate such as a compact disc or a DVD (Digital Versatile Disc). There is something that was done. In such an ink jet printer, generally, a thin plate-like body such as an optical disc is set on a tray having a plate shape, and is transported (sub-scan feed) along a transport path in the ink jet printer in a state of being set on the tray. Recording is then performed.

  Here, a method for detecting the center position (printing reference position) of the optical disk has been proposed in order to perform printing on the label surface (printing area) of the optical disk with high accuracy so as not to cause a printing position shift. As one example, in Patent Document 1, an identification mark is provided on the tray, and an optical sensor is provided on a bottom portion of the carriage that is reciprocated in the main scanning direction, that is, a portion facing the tray, and the identification mark is sensed by the sensor. Thus, a method for obtaining the center position of the optical disc is disclosed.

JP 2002-127530 A

However, in the method described in Patent Document 1, after the entire optical disk is sensed in the main scanning direction by the optical sensor, this time, the carriage for obtaining the center position is similarly sensed in the sub-scanning direction. As a result, the amount of movement and the sub-scan feed amount of the tray are increased, and thus sensing takes time.
Further, when the tray is sub-scan fed, slip easily occurs between the tray and the transport roller. Therefore, the tray sub-scan feed amount at the time of sensing is preferably as small as possible in order to improve the detection accuracy of the center position. Further, the smaller the amount of movement of the carriage, the better in order to improve the detection accuracy.

  Accordingly, the present invention has been made in view of such a situation, and an object thereof is to shorten the sensing time by an optical sensor when obtaining the reference position of the recording medium set on the tray, and further to the reference position. This is to further improve the detection accuracy of the above.

  In order to solve the above problems, a first aspect of the present invention is a tray having a plate shape that can be sub-scanned and fed by a conveyance roller that conveys a recording medium to a region facing a recording head that records on the recording medium. A tray having a main body and a set portion formed on the tray main body and capable of setting a thin plate-like body as a recording medium, the tray being formed on the recording medium. A fitting portion that is fitted to the fitting hole, and a first detected line that is formed by a boundary line of a region having a different light reflectance and is orthogonal to the main scanning direction; A second detected line that is formed by a boundary line between regions having different reflectivities and that is orthogonal to the sub-scanning direction is formed.

  According to this aspect, the first detected line and the second detected line are orthogonal to the main scanning direction and the sub-scanning direction, respectively. The distance between the position (hereinafter referred to as “reference position xc”) and the first detected line, the reference position in the sub-scanning direction when executing recording (hereinafter referred to as “reference position yc”) and the first By obtaining the distance to the second detected line in advance, the reference position xc can be obtained regardless of the location of the first detected line, and the second detected line. The reference position yc can be obtained by sensing any place in. That is, the first detected line and the second detected line are orthogonal to the main scanning direction and the sub-scanning direction, respectively, so that when the reference position xc and the reference position yc are obtained, It is sufficient to detect the detected line and the second detected line, thereby shortening the sensing time.

Further, since the sub-scan feed amount of the tray when detecting the second detected line can be small, the detection of the reference position yc due to the occurrence of slip between the transport roller for transporting the tray and the tray. A decrease in accuracy can be reduced or prevented.
In particular, a trace line of the sensor when detecting the first detected line and the second detected line by a sensor can be prevented from crossing the fitting portion, and further, the first After crossing the detected line (or the second detected line), the second detected line (or the first detected line) is continuously traversed without detaching from the fitting portion. Therefore, the amount of sub-scan feed of the tray when determining the reference position yc can be extremely small, and a decrease in the detection accuracy of the reference position yc can be prevented more reliably, and the reference position xc and the reference position can be prevented. Sensing time for obtaining yc can be greatly shortened.

According to a second aspect of the present invention, in the first aspect, the set portion has a symmetrical shape in the main scanning direction and the sub-scanning direction, and the fitting portion is in the main scanning direction and sub-scanning of the set portion. It is provided in the center position in the direction.
According to this aspect, the set portion has a symmetrical shape in the main scanning direction and the sub-scanning direction, and the fitting portion is provided at the center position of the set portion in the main scanning direction and the sub-scanning direction. When the reference position xc and the reference position yc are set to the center position of the recording medium, the operational effect of the first aspect can be obtained.

According to a third aspect of the present invention, in the first or second aspect, each of the first detected line and the second detected line is a side constituting one figure. To do.
According to this aspect, in the first or second aspect, each of the first detected line and the second detected line is a side that constitutes one figure. The detected line and the second detected line can be formed easily and at low cost.

According to a fourth aspect of the present invention, in the third aspect, the one figure is a right triangle.
According to this aspect, since the one figure is a right triangle, the one figure can have a necessary and minimum area, and the degree of freedom of the arrangement of the one figure in the fitting portion can be increased. In addition, when the one figure is formed by a hole, it is possible to prevent a decrease in strength of the fitting portion.

According to a fifth aspect of the present invention, in the third aspect, the one figure further includes a third detected line perpendicular to the main scanning direction, which is formed by a boundary line between regions having different light reflectances. It is characterized by that.
According to this aspect, since the one figure further includes the third detected line that is formed by the boundary lines of the regions having different light reflectivities and orthogonal to the main scanning direction, the optical sensor is mainly used. When sensing along the scanning direction, the detected line (the first detected line or the third detected line) on the near side, regardless of which side the sensor is located on the fitting portion. Sensing can be performed, sensing time can be further shortened, and the degree of freedom of control can be improved.

According to a sixth aspect of the present invention, in the fifth aspect, the method further includes a fourth detected line that is formed by a boundary line between regions having different light reflectances and that is orthogonal to the sub-scanning direction. Features.
According to this aspect, since the one figure further includes the fourth detected line that is formed by the boundary lines of the regions having different light reflectivities and orthogonal to the sub-scanning direction, When sensing along the scanning direction, the detected line (second detected line or fourth detected line) on the near side is detected regardless of which side the sensor is on the fitting portion. Sensing can be performed, sensing time can be further shortened, and the degree of freedom of control can be improved.

According to a seventh aspect of the present invention, in the fifth or sixth aspect, the one figure is a quadrangle.
According to this aspect, since the one figure is a quadrangle, the reference position xc and the reference position yc can be obtained using any detected line that forms the quadrangle, and the sensing time can be further shortened. In addition, the degree of freedom of control can be improved.

  According to an eighth aspect of the present invention, there is provided a tray main body having a plate shape that can be sub-scanned and fed by a conveying roller that conveys the recording medium to a region facing a recording head that performs recording on the recording medium, and formed on the tray main body. And a set part capable of setting a thin plate-like body as a recording medium, wherein the thin plate-like body has a disk shape and the set part has a circular shape, A sub-scanning direction formed in the tray main body by a first detection line orthogonal to the main scanning direction, which is formed by a boundary line of a region having different light reflectance, and a boundary line of a region having a different light reflectance. A second detected line orthogonal to the first detected line and the second detected line are sides constituting one figure, and the one figure is the set unit. On the outside And the position thereof is a position deviating from the center position in the main scanning direction and the center position in the sub-scanning direction of the set portion, and within the formation range of the set portion and / or sub-scanning in the main scanning direction. It is located in the formation range of the said set part in a direction.

  According to this aspect, in addition to being able to obtain the same functions and effects as those of the first and third aspects described above, the set part having a circular shape when the one figure is disposed outside the set part. Therefore, when the one figure is arranged outside the set portion, it is not necessary to enlarge the tray in order to arrange the one figure.

  According to a ninth aspect of the present invention, there is provided a tray main body having a plate shape that can be sub-scanned and fed by a conveying roller that conveys the recording medium to an area facing a recording head that performs recording on the recording medium, and formed on the tray main body. And a set part capable of setting a thin plate-like body as a recording medium, wherein the thin plate-like body has a disk shape and the set part has a circular shape, A sub-scanning direction formed in the tray main body by a first detection line orthogonal to the main scanning direction, which is formed by a boundary line of a region having different light reflectance, and a boundary line of a region having a different light reflectance. A second detected line orthogonal to the first detected line and the second detected line are sides constituting one figure, and the one figure is the set unit. On the outside With the location, the position, characterized in that located in the center in the center or the sub-scanning direction in the main scanning direction of the set portion.

  According to this aspect, in addition to being able to obtain the same operational effects as those of the first and third aspects described above, when placing the one figure outside the set unit, the one figure is the set. When the reference position xc and the reference position yc are set at the center of the set unit, the one figure is set in the main scan direction of the set unit. When placed in the center, the distance between the first detected line and the reference position xc is shortened, or when the one figure is placed in the center of the set unit in the sub-scanning direction, the second covered line is detected. The distance between the detection line and the reference position yc is shortened, thereby preventing a decrease in detection accuracy of the reference position xc or the reference position yc.

  According to a tenth aspect of the present invention, there is provided a carriage having a recording head for recording on a recording medium, a carriage motor for driving the carriage, and a position on the carriage facing the recording medium. A sensor for detecting a difference in light reflectivity of the medium, a conveyance drive roller that is driven to rotate and conveys the medium to be conveyed to the recording head by nipping and rotating the medium to be conveyed, and a pressure contact with the conveyance drive roller And a conveyance roller configured to include a conveyance driven roller that is driven to rotate, a conveyance drive roller motor that rotationally drives the conveyance drive roller, and a controller that controls the carriage motor and the conveyance drive roller motor; , And a tray main body having a plate shape and a thin plate-like body as a recording medium can be set on the tray main body A recording apparatus configured to be capable of transporting a tray having a set portion to be formed by the transport roller, wherein the main body is formed on the tray body by boundary lines of regions having different light reflectivities. A first detected line that intersects the scanning direction and a second detected line that intersects with the sub-scanning direction and is formed by a boundary line between regions having different light reflectivities are formed. The detection line and the second detected line are lines that form one figure, respectively, and the control unit controls the motor for the conveyance drive roller and the motor for the carriage, so that the sensor is the first line. The trace line that crosses the detected line and the sensor is configured to form a trace line that crosses the second detected line.

  According to this aspect, the first detected line and the second detected line are lines forming one figure, and the control unit controls the conveyance drive roller motor and the carriage motor. Therefore, since the sensor is configured to form a trace line crossing the first detected line and a trace line crossing the second detected line, the reference positions xc and yc are The amount of movement of the carriage and the amount of sub-scan feed of the tray at the time of obtaining can be extremely small, and it is possible to more reliably prevent the detection accuracy of the reference positions xc and yc from being lowered, and to greatly reduce the sensing time. Can do.

  In an eleventh aspect of the present invention, a carriage having a recording head for recording on a recording medium, a carriage motor for driving the carriage, and a position on the carriage facing the recording medium are provided. A sensor for detecting a difference in light reflectivity of the medium, a conveyance drive roller that is driven to rotate and conveys the medium to be conveyed to the recording head by nipping and rotating the medium to be conveyed, and a pressure contact with the conveyance drive roller And a conveyance roller configured to include a conveyance driven roller that is driven to rotate, a conveyance drive roller motor that rotationally drives the conveyance drive roller, and a controller that controls the carriage motor and the conveyance drive roller motor; , And a tray main body having a plate shape and a thin plate-like body as a recording medium can be set on the tray main body A recording apparatus configured to be able to convey a tray configured to include a set portion to be formed by the conveyance roller, and the set portion is fitted with a fitting hole formed in the recording medium A fitting portion is provided, and the fitting portion includes a first detected line that is formed by a boundary line between regions having different light reflectivities, and a region having different light reflectivities. A second detected line orthogonal to the sub-scanning direction formed by the boundary line is formed, and the trace line of the sensor when the sensor detects the first detected line is the main scanning direction And the trace line of the sensor when the second detected line is detected by the sensor in the sub-scanning direction so as to cross the first detected line without crossing the fitting portion along Along As crossing the second detected line without crossing the serial fitting portion, wherein the control unit controls the motor for the transport driving roller motor and the carriage.

  According to this aspect, the conveyance drive roller motor and the carriage motor are controlled so that the trace line of the sensor when the sensor detects the first detected line does not cross the fitting portion. Therefore, the amount of movement of the carriage and the amount of sub-scan feed of the tray when determining the reference positions xc and yc can be extremely small, and a decrease in the detection accuracy of the reference positions xc and yc can be prevented more reliably. Sensing time can be greatly reduced.

  According to a twelfth aspect of the present invention, a carriage having a recording head for recording on a recording medium, a carriage motor for driving the carriage, and a position facing the recording medium in the carriage are provided. A sensor for detecting a difference in light reflectivity of the medium, a conveyance drive roller that is driven to rotate and conveys the medium to be conveyed to the recording head by nipping and rotating the medium to be conveyed, and a pressure contact with the conveyance drive roller And a conveyance roller configured to include a conveyance driven roller that is driven to rotate, a conveyance drive roller motor that rotationally drives the conveyance drive roller, and a controller that controls the carriage motor and the conveyance drive roller motor; , And a tray main body having a plate shape and a thin plate-like body as a recording medium can be set on the tray main body A recording apparatus configured to be able to convey a tray configured to include a set portion to be formed by the conveyance roller, and the set portion is fitted with a fitting hole formed in the recording medium A fitting portion is provided, and the fitting portion includes a first detected line that is formed by a boundary line between regions having different light reflectivities, and a region having different light reflectivities. A second detection line that is formed by a boundary line and that is perpendicular to the sub-scanning direction, and the sensor detects the first detection line and the second detection line by the sensor. The trace line crosses the first detected line and then crosses the second detected line without detaching from the fitting portion, or after crossing the second detected line. The fitting part So that subsequently without departing et crossing the first detected line, characterized in that the control unit controls the motor for the transport driving roller motor and the carriage.

  According to this aspect, the fitting after the trace line of the sensor when the first detected line and the second detected line are detected by the sensor crosses the first detected line. The first detected line is continuously crossed without crossing the second detected line without detaching from the fitting section, or after crossing the second detected line without detaching from the fitting section. As described above, since the control unit controls the conveyance drive roller motor and the carriage motor, the amount of movement of the carriage and the amount of sub-scan feed of the tray when determining the reference positions xc and yc can be extremely small. A reduction in the detection accuracy of xc and yc can be prevented more reliably, and the sensing time can be greatly shortened.

In a thirteenth aspect of the present invention, in any one of the tenth to twelfth aspects, the first detected line is orthogonal to the main scanning direction, and the second detected line is in the sub-scanning direction. The sensors are orthogonal, and the sensor detects the first detected line orthogonal to the main scanning direction and the second detected line orthogonal to the sub-scanning direction.
According to this aspect, since the first detected line is orthogonal to the main scanning direction and the second detected line is orthogonal to the sub-scanning direction, the first detected line and the The second detected line can be detected easily and reliably.

A fourteenth aspect of the present invention is the recording apparatus according to any one of the tenth to thirteenth aspects, wherein the recording is performed based on the detection results of the first detected line and the second detected line. The reference position is calculated.
According to this aspect, the reference position for executing the recording can be accurately obtained in a short time.

According to a fifteenth aspect of the present invention, in the fourteenth aspect, the recording medium has a symmetrical shape in the main scanning direction and the sub-scanning direction, and the reference position is in the main scanning direction and the sub-scanning direction of the recording medium. It is the center position in the scanning direction.
According to this aspect, when the reference position for executing recording is set to the center position of the recording medium, the center position can be accurately obtained in a short time.

1 is an external perspective view of an apparatus main body of a printer according to the present invention. 1 is a side sectional view of a printer according to the present invention. FIG. 3 is a block diagram of a control unit of the printer according to the present invention. The top view of the tray which concerns on this invention. The perspective view of the front-end | tip of the tray which concerns on this invention. The top view of a to-be-detected part (1st Embodiment). The top view of a to-be-detected part (2nd Embodiment). The top view of a to-be-detected part (modification of 2nd Embodiment). The top view of a to-be-detected part (3rd Embodiment). The top view of a to-be-detected part (modification of 3rd Embodiment). The top view of a to-be-detected part (modification of 3rd Embodiment). The top view of a to-be-detected part (4th Embodiment). The top view of a to-be-detected part (modification of 4th Embodiment). The flowchart which shows the content of the sequence which calculates | requires the center coordinate of a setting part. The flowchart which shows the content of the sequence which calculates | requires the center coordinate of a setting part. The flowchart which shows the content of the sequence which calculates | requires the center coordinate of a setting part. The top view of the tray which concerns on this invention. The top view of the tray which concerns on this invention. The top view of the tray which concerns on this invention. The top view of the tray which concerns on this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following, an outline of an ink jet printer (hereinafter referred to as “printer”) 1 as an example of a recording apparatus according to the present invention will be described first with reference to FIGS. Here, FIG. 1 is an external perspective view of the main body of the printer 1 (with the exterior case removed), FIG. 2 is a sectional side view thereof, and FIG. 3 is a block diagram centering on the drive control unit 60. Hereinafter, the right direction (front side of the printer) in FIG. 2 is referred to as “downstream side” of the paper or tray conveyance path, and the left direction (back side of the printer) is referred to as “upstream side”.

  The printer 1 includes a feeding device 2 capable of setting a recording sheet (mainly cut sheet paper: hereinafter referred to as “sheet P”) as an example of “recording medium” and “ejection medium” in an inclined posture at the rear part, The paper P is fed from the feeding device 2 toward the downstream conveying roller 4. The fed paper P is transported to the recording means 3 on the downstream side by the transport roller 4 and recording is performed. The conveyance roller 4 also conveys a tray 100 described later, and the recording unit 3 performs recording on the label surface of the optical disk D as a thin plate (recording medium) set on the tray 100. The paper P and the optical disk D (tray 100) on which recording has been performed by the recording means 3 are discharged to the front of the apparatus by the discharge rollers 5 on the downstream side.

Hereinafter, components on the paper conveyance path of the printer 1 will be described in more detail. The feeding device 2 includes a hopper 11, a feeding roller 12, a retard roller 13, and a return lever 14.
The hopper 11 is formed of a plate-like body, and is configured to be swingable around an upper swing fulcrum (not shown). By swinging, the paper P supported in an inclined posture is fed onto the hopper 11. The roller 12 is pressed against or separated from the feeding roller 12. The feeding roller 12 has a substantially D shape when viewed from the side, and feeds the uppermost sheet P in pressure contact with its arc portion to the downstream side, while the feeding roller 4 after the sheet P is fed. During the conveyance of the paper P, the flat portion is controlled so as to face the paper P as shown in the figure so as not to cause a conveyance load.

  The retard roller 13 is provided so as to be in press contact with the arc portion of the feeding roller 12. When only one sheet P is fed without the double feeding of the sheet P, the retard roller 13 contacts the sheet P and rotates (clockwise in FIG. 2) to feed the sheet P. When there are a plurality of sheets between the feed roller 12 and the retard roller 13, the friction coefficient between the sheets is lower than the friction coefficient between the sheet P and the retard roller 13. Become. Therefore, this prevents the next and subsequent sheets P, which are to be double-fed by the uppermost sheet P to be fed, from traveling from the retard roller 13 to the downstream side, thereby preventing double feeding. The return lever 14 is provided so as to be rotatable, and has the effect of returning the next and subsequent sheets P about to be double fed onto the hopper 11.

  Between the feeding device 2 and the conveying roller 4, a paper detector 81 (FIG. 3) that detects the passage of the paper P and a feeding posture of the paper P are formed and the paper P is fed to the feeding roller 12 A guide roller 26 is provided for preventing contact and reducing the transport load. In the present embodiment, the guide roller 26 is pivotally supported at the upstream end of the paper guide top 24 so as to be freely rotatable.

  The conveyance roller 4 provided on the downstream side of the feeding device 2 includes a conveyance driving roller 30 that is rotationally driven by a motor, and a conveyance driven roller 31 that is driven to rotate while being pressed against the conveyance driving roller 30. ing. The transport driving roller 30 is provided with an adhesion layer formed by substantially uniformly dispersing wear-resistant particles on the outer peripheral surface of a metal shaft extending in the paper width direction, and the transport driven roller 31 has a low friction material such as an elastomer on the outer peripheral surface. A plurality of the drive driving rollers 30 are arranged in the axial direction.

  Further, in the present embodiment, two transport driven rollers 31 are pivotally supported at the downstream end portion of one paper guide upper 24 so as to be freely rotatable, and three of the paper guide upper 24 are in the paper width direction, as shown in FIG. It is provided as shown. In addition, the paper guide upper 24 is provided so as to be swingable about the shaft 24 a when the shaft 24 a is pivotally supported by the main frame 23, as viewed from the side of the paper conveyance path. Is urged in a direction in pressure contact with the conveyance drive roller 30.

The transport driving roller 31 is rotationally driven by the sub-scanning driving unit 59. That is, the sub-scan driving unit 59 performs sub-scan feed of the paper P (and a tray 100 described later).
The paper P that has reached the transport roller 4 is transported to the recording means 3 on the downstream side when the transport drive roller 30 rotates while being nipped by the transport drive roller 30 and the transport driven roller 31. Further, the tray 100 described later is also transported to the recording unit 3 on the downstream side when the transport driving roller 30 rotates while being nipped by the transport driving roller 30 and the transport driven roller 31.

  The recording unit 3 includes an inkjet recording head (hereinafter referred to as “recording head”) 36 and a paper guide lower portion 37 provided to face the recording head 36. The recording head 36 is provided at the bottom of the carriage 33, and the carriage 33 is disposed so as to be guided by a carriage guide shaft 34 extending in the main scanning direction (front and back direction in FIG. 2), and the main scanning driving unit 57. Is driven to reciprocate in the main scanning direction. That is, the main scanning drive unit 57 performs main scanning of the recording head 36 (and a PW sensor 80 described later). Further, the head drive unit 58 drives the recording head 36 during the main scanning to execute recording on the paper P (and an optical disk D described later). The carriage 33 is equipped with an independent ink cartridge 35 for each of a plurality of colors, and ink is supplied from the ink cartridge 35 to the recording head 36.

  In the paper guide 37 that defines the distance between the paper P and the recording head 36, a rib extending in the sub-scanning direction is formed on the surface facing the recording head 36, and a recess 37a for discarding ink is formed. Thus, by ejecting the ink ejected to the area off the edge of the paper P into the concave portion 37a, so-called borderless printing is performed in which printing is performed without margins on the edge of the paper P.

  Subsequently, a guide roller 43 and a discharge roller 5 are provided on the downstream side of the recording head 36. The guide roller 43 functions to prevent the paper P from being lifted from the paper guide bottom 37 and to keep the distance between the paper P and the recording head 36 constant. The discharge roller 5 includes a discharge drive roller 41 that is rotationally driven by a PF motor 64 (FIG. 3), and a discharge driven roller 42 that is driven to rotate in contact with the discharge drive roller 41. In the present embodiment, a plurality of discharge driving rollers 41 are provided in the axial direction of a shaft body that is made of a rubber roller and is rotationally driven.

  Further, the discharge driven roller 42 is formed by a toothed roller having a plurality of teeth on the outer periphery, and a plurality of discharge driven rollers 42 are provided on the discharge frame Assy 45 having a long shape in the main scanning direction so as to correspond to the plurality of discharge driving rollers 41. . The paper P on which recording has been performed by the recording means 3 is driven forward by the discharge drive roller 41 while being nipped by the discharge drive roller 41 and the discharge driven roller 42, so that the paper P is directed toward the front of the apparatus (not shown). Discharged.

The paper discharge frame Assy 45 is provided so as to be displaceable by a release means (not shown) so that a contact position where the discharge driven roller 42 contacts the discharge driving roller 41 and a separation position where the discharge driven roller 42 is separated from the discharge driving roller 41 can be taken. ing.

  The above are the components on the paper transport path. The printer 1 is configured to be capable of ink jet recording directly on the label surface of an optical disc (thin plate-like body) such as a CD-R in addition to a cut sheet as a recording medium. Has been. As shown in FIG. 1, an optical disk D as a recording medium is conveyed on a linear tray conveyance path in the printer 1 while being set on a tray 100 having a plate shape. The tray 100 is configured separately from the printer 1 and is manually inserted into the tray conveyance path toward the rear side (upstream side) of the printer 1 while being supported by a tray guide 7 provided in front of the printer 1. Then, it is sub-scan fed by the conveying roller 4. The configuration of the tray 100 will be described in detail later.

  Subsequently, referring to FIG. 3, the drive control unit 60 that executes a predetermined recording method by controlling the drive units of the main scanning drive unit 57, the head drive unit 58, and the sub-scanning drive unit 59, and the surroundings. The configuration will be described. The drive control unit 60 is configured to be able to transmit and receive data to and from the host computer 150 that transmits print information (print data) to the printer 1, and includes an IF 61, an ASIC 62, and a RAM 63 that are interfaces with the host computer 150. , PROM 64 and EEPROM 65, CPU 66, timer IC 67, DC unit 68, transport motor (PF motor) driver 71, carriage motor (CR motor) driver 70, and head driver 69.

  The CPU 66 performs arithmetic processing for executing the control program of the printer 1 and other necessary arithmetic processing, and the timer IC 67 causes the CPU 66 to generate periodic interrupt signals necessary for various processing. The ASIC 62 controls the print resolution, the drive waveform of the ink jet recording head 25, and the like based on the print data transmitted from the host computer 150 via the IF 61. The RAM 63 is used as a work area for the ASIC 62 and the CPU 66 and a primary storage area for other data. The PROM 64 and the EEPROM 65 have various control programs (firmware) necessary for controlling the printer 1 and data necessary for processing. Is stored.

  The DC unit 68 is a control circuit for controlling the speed of the DC motor (the CR motor 73 and the PF motor 64), and includes a PID control unit, an acceleration control unit, a PWM control circuit, etc., not shown. The DC unit 68 is based on control commands sent from the CPU 66 and output signals from detection means such as a rotary encoder 78, a linear encoder 79, a paper detector 81 that detects the passage of the recording paper P, and a PW sensor 80. Various calculations for controlling the speed of the DC motor are performed, and signals are sent to the CR motor driver 70 and the PF motor driver 71.

  The PF motor driver 71 drives and controls the PF motor 64 as a “conveyance drive roller motor” under the control of the DC unit 68. In the present embodiment, the PF motor 64 rotates a plurality of driving objects, that is, the feeding roller 13, the conveyance driving roller 30, and the discharge driving roller 41 described above.

  The CR motor driver 70 drives the CR motor 73 as a “carriage motor” under the control of the DC unit 68 to reciprocate the carriage 33 in the main scanning direction, or stop and hold the carriage 33. The head driver 69 drives and controls the recording head 25 according to the print data transmitted from the host computer 150 under the control of the CPU 66.

  The CPU 66 and the DC unit 68 include a detection signal from a paper detector 81 that detects the start and end of the conveyed paper P, and a rotary encoder 78 for detecting the rotation amount, rotation direction, and rotation speed of the PF motor 64. And an output signal from a linear encoder 79 that detects an absolute position of the carriage 33 in the main scanning direction. Further, an output signal from the PW sensor 80 is also given to the CPU 66 and the DC unit 68.

  The PW sensor 80 is an optical sensor provided at the bottom of the carriage 33, and a light emitting unit (not shown) that emits light toward the paper P or the tray 100 and a light receiving unit that receives reflected light from the paper P or the tray 100. And a difference in reflectance on the recording paper P or a difference in reflectance on the tray 100 is detected. As a result, the control unit 60 detects the presence or absence of the paper P and the width of the paper P as the PW sensor 80 senses.

  In addition, the control unit 60 calculates the center position of the set unit 102 (described later) in the tray 100 by sensing the detected portion (described later) provided on the tray 100 by the PW sensor 80 as described later. Based on the center position information thus detected, the position of the recording area when the main scanning direction and the sub-scanning direction are used as a coordinate system is determined.

  The rotary encoder 78 includes a disk-like scale (not shown) having a large number of light transmitting parts on the outer peripheral part, a light emitting part that emits light to the light transmitting part, and a light receiving part that receives light that has passed through the light transmitting part. A detection unit (not shown), and a drive control unit that outputs a rising signal and a falling signal formed by the light passing through the light-transmitting unit according to the rotation of the disc scale. 60 receives the output signal from the rotary encoder 78 and detects the rotation amount, rotation speed, and rotation direction of the conveyance drive roller 30 and the like, and thereby feeds the target paper P or tray 100. Control (sub-scan feed) can be executed.

The linear encoder 79 receives a code plate 79b that is long in the main scanning direction, a light emitting unit that emits light to a plurality of light transmitting units that are formed in the main scanning direction on the code plate 79b, and light that has passed through the light transmitting unit. A detection unit 79a including a light receiving unit is provided. The detection unit 79a outputs a rising signal and a falling signal formed by the light passing through the light transmitting unit, and the drive control unit 60 receives the output signal from the detection unit 79a. The position of the carriage 33 (that is, the PW sensor 80) in the main scanning direction is detected.
The PF motor driver 71 and the PF motor 64 constitute the sub-scanning drive unit 59 shown in FIG. 1, the CR motor driver 70 and the CR motor 73 constitute the main scanning drive unit 57, and the head driver 69 is the head driver 69. The drive part 58 is comprised.

The above is the outline of the printer 1, and the configuration of the tray 100 will be described in detail below with reference to FIGS. 4 and 5. 4 is a plan view of the tray 100, and FIG. 5 is an external perspective view of the front end of the tray 100. FIG.
As shown in FIG. 4, the tray 100 has a rectangular shape in plan view, forms a plate shape that can be nipped by the transport driving roller 30 and the transport driven roller 31, and rotates along with the rotation of the transport driving roller 30. Scan feed is possible.

  The tray 100 is integrally formed of a resin material so as to include the tray main body 101 and the set unit 102. The set part 102 is comprised by the recessed part which comprises circular shape in planar view so that it may show in figure. A convex portion 103 as a “fitting portion” is formed at the center of the set portion 102, and when the optical disc D is set on the set portion 102, a fitting hole (center hole) Dh (FIG. 1) of the optical disc D is formed. The projection 103 is fitted, and thereby the position of the optical disc D in the set portion 102 (tray 100) is determined. Incidentally, holes 104 and 104 formed around the set portion 102 are holes for ejecting the optical disc D.

  4 is the transport direction (sub-scanning direction) of the tray 100, and when the tray 100 is inserted into the transport path of the tray 100 via the tray guide 7 as described above (feeding), The top of FIG. 4 is inserted as a tip. That is, reference numeral 106 indicates the front end of the tray 100. As shown in FIG. 5, tongue pieces 107 and 107 are formed integrally with the tray 100 at the front end of the tray 100 so as to protrude in the insertion direction of the tray 100.

As shown in FIG. 5, the tongue piece 107 is tapered toward the tip, and its bottom surface forms a flat surface together with the bottom surface of the tray main body 101. Further, the front end 106 of the tray 100 is formed so as to taper toward the front end in the same manner as the tongue piece 107.
The tongue piece 107 has the following operational effects. That is, when the tray 100 is inserted into the conveyance path of the tray 100, the front end 106 of the tray 100 is used as a head, and the tray 100 is inserted toward the rear side of the printer 1 through the tray guide 7.

  Here, in order to perform sub-scan feeding of the tray 100 by the transport driving roller 30 and the transport driven roller 31, it is necessary to make the leading end 106 of the tray 100 enter between the transport driving roller 30 and the transport driven roller 31. Since the tongue piece 107 is formed at the front end 106 of the tray 100, when the tray 100 is fed toward the conveyance roller 4 by a feeding means (not shown), the tongue piece 107 is conveyed to the conveyance driving roller 30 and conveyed. The leading edge 106 of the tray 100 enters the space between the transport driving roller 30 and the transport driven roller 31, and the tray 100 is eventually nipped by both rollers.

  That is, since the area of the front end of the tray 100 (as viewed in plan) is extremely reduced by the tongue 107, the front end 106 of the tray 100 can be easily inserted between the transport driving roller 30 and the transport driven roller 31 with a small force. Can do. Accordingly, this makes it possible to allow the tray 100 to enter between the transport driving roller 30 and the transport driven roller 31 without using a means for separating (releasing) the transport driven roller 31 from the transport driving roller 31. .

  Subsequently, as shown in FIGS. 4 and 5, a detected portion 105 </ b> A detected by the PW sensor 80 is formed on the convex portion 103. The detected portion 105A (the same applies to the detected portions 105B, 105C, and 105D described later) is formed by a hole penetrating the tray main body 101, and thereby the inner side and the outer side (convex portion 103) of the detected portion 105A. Then, there is a difference in the light reflectance. That is, the detected portion 105A is formed by a boundary line between regions having different light reflectivities (inside and outside of the hole) as shown in FIG. 6, and in the main scanning direction (FIGS. 4, 6 to 13, and 17). The first detected line 108A and the third detected line 108C orthogonal to the horizontal direction in FIG. 20 to FIG. 20, and the sub-scanning direction (vertical direction in FIG. 4, FIG. 6 to FIG. 13, FIG. 17 to FIG. 20). The second detected line 108B and the fourth detected line 108D that are orthogonal to each other form a square or rectangle (one figure). The “detected line” means a boundary line of a region having a different light reflectance that can be detected by the PW sensor 80.

  Further, since the tray 100 is restricted in position in the main scanning direction by the tray guide 7, the control unit 60 (FIG. 3) holds in advance the position information of the detected portion 105 </ b> A (convex portion 103) in the main scanning direction. In addition, for example, by detecting a change in reflectance when the front end 106 of the tray 100 passes through the PW sensor 80, position information in the sub-scanning direction of the detected portion 105A (the convex portion 103) can be obtained. It has become. Note that a dedicated detection target (a reflection mark or the like) for knowing the position of the detection target 105A in the sub-scanning direction may be separately provided on the tray 100. Further, since the control unit 60 can hold in advance the position information of the detected portion 105A (the convex portion 103) in the main scanning direction, the PW sensor 80 is positioned at that position, and the tray 100 is sub-scanned. In addition, it is also possible to directly detect the detected part 105A and obtain the position information of the detected part 105A in the sub-scanning direction.

  Hereinafter, the role of the detected part 105A will be described in detail with reference to FIGS. 6, 7, 9, 12, and 13 are plan views of the detected portion 105 </ b> A, and FIGS. 8, 10, and 11 are detected portions that are modifications of the detected portion 105 </ b> A. It is a top view which shows 105B, 105C, 105D. 14 to 16 are flowcharts showing the contents of a sequence for obtaining the position coordinates of the center c of the set unit 102.

  When recording is performed on the label surface of the optical disc D set on the tray 100, based on the position coordinates of the center of the set portion 102 (the convex portion 103) (indicated by reference numeral c in FIGS. 6 to 13), Set the area for recording. The position coordinates are determined by driving the carriage 33 (CR motor 73), so that the PW sensor 80 traces the detected portion 105A (or detected portions 105B to 105D described later) in the main scanning direction, and also carries the conveyance. When the roller 30 (PF motor 64) is driven, the PW sensor 80 traces the detected portion 105A (or detected portions 105B to 105D described later) in the sub-scanning direction, and is thus obtained. . In the following, the coordinates of the center c in the main scanning direction (hereinafter also referred to as “x direction” as appropriate) are denoted as xc, and the sub-scanning direction (hereinafter also referred to as “y direction” as appropriate) coordinates are denoted as yc.

6 to 13, the arrows indicated by (1) to (4) indicate the trace line and the direction when sensing by the PW sensor 80.
In the first embodiment shown in FIG. 6, the trace line when the PW sensor 80 senses the first detected line 108A as shown by the arrow (1) crosses the convex portion 103 along the x direction. So that the trace line when the PW sensor 80 senses the second detected line 108B does not cross the convex portion 103 along the y direction as indicated by the arrow (2). 33 and the conveyance drive roller 31 are driven and controlled.

  In the second embodiment shown in FIG. 7, as indicated by arrows (1) and (2), the trace line of the PW sensor 80 does not cross the convex portion 103 as in the first embodiment, and this embodiment In particular, the carriage 33 is set so that the trace line of the PW sensor 80 does not deviate from the convex portion 103 (further, the detected portion 105A) after the trace line of the PW sensor 80 crosses the second detected line 108B. And the conveyance drive roller 31 are driven and controlled.

  FIG. 14 shows a procedure for obtaining the coordinates xc and the coordinates yc by the sensing of the PW sensor 80, and the main scanning direction of the first detected line 108A by sensing in the x direction (1) (step S101). Is detected, and the coordinate yd in the sub-scanning direction of the second detected line 108B is detected by sensing in the y direction (step S102).

  As shown in FIGS. 6 and 7, the coordinate xd and the center c are separated by a distance x1 in the x direction, and the coordinate yd and the center c are separated by a distance y1 in the y direction. These values x1, y1 Is previously written in the ROM 64 or the EEPROM 65 (FIG. 3). Therefore, by detecting the coordinates xd and yd, the x-direction coordinate xc of the center c can be obtained by xd-x1 as shown in step S103 of FIG. 14, and the y-direction coordinate yc of the center c is represented by yd-y1. Can be sought.

  Here, as described above, in the first and second embodiments shown in FIGS. 6 and 7, the carriage 33 and the conveyance drive roller 31 are driven and controlled so that the trace line of the PW sensor 80 does not cross the convex portion 103. The Further, in the second embodiment shown in FIG. 7, after crossing the first detected line 108 </ b> A, the second detected line 108 </ b> B is continuously crossed without deviating from the convex portion 103 (further, the detected portion 105 </ b> A). The carriage 33 and the conveyance drive roller 31 are driven and controlled.

  Therefore, in any case, the movement amount of the carriage 33 and the sub-scan feed amount of the tray 100 can be reduced, and the deterioration of the detection accuracy of the x-direction coordinate xc and the y-direction coordinate yc of the center c can be more reliably prevented. In addition, the sensing time of the PW sensor 80 when determining the position of the center c can be shortened. In particular, in the second embodiment, since the trace line of the PW sensor 80 can be extremely short, the sensing time can be further shortened.

  In the first and second embodiments, since two lines of the first detected line 108A and the second detected line 108B are detected, the detected part 105A is indicated by reference numeral 105B in FIG. It can also be formed by a right triangle. Thereby, the area of the detected part (hole) can be small, and the strength of the convex part 103 can be improved.

  In the first and second embodiments, similar sensing can be performed using the other two detected lines, that is, the third detected line 108C and the fourth detected line 108D. As described above, since the third detected line 108C and the fourth detected line 108D are further provided in addition to the first detected line 108A and the second detected line 108B, the degree of freedom of control is increased. Can be improved.

  Next, in the third embodiment shown in FIG. 9, the x-direction coordinate xc of the center c is calculated using the x-direction coordinate xd1 of the first detected line 108A and the x-direction coordinate xd2 of the third detected line 108C. Ask. More specifically, as shown in FIG. 15, the first x-direction sensing (1) (step S201) detects the coordinate xd1 in the x-direction of the first detected line 108A, and the second x-direction sensing ( 2) The coordinate xd2 in the x direction of the third detected line 108C is detected by (step S202). Thereafter, the coordinate yd in the y direction of the second detected line 108B is detected by sensing (3) in the y direction (step S203).

Accordingly, by detecting the coordinates xd1, xd2, and yd, the x-direction coordinate xc of the center c can be obtained by (xd1 + xd2) / 2 as shown in step S204 of FIG. 15, and the y-direction coordinate yc of the center c is obtained. It can be obtained by yd-y1.
Here, as described above, the x-direction coordinate xc of the center c is obtained on the basis of two positions, that is, the position of the first detected line 108A and the position of the third detected line 108C. Even when the detection accuracy when detecting either the detected line 108A or the third detected line 108C is lowered, the error can be reduced (halved).

  In this way, in the present embodiment, since the center c is positioned between the first detected line 108A and the third detected line 108C, the first in terms of manufacturing the tray 100 is used. Management is performed so that the center c is positioned between the detected line 108A and the third detected line 108C.

  Further, the detected portion 105A can be formed in a semi-elliptical shape as indicated by reference numeral 105C in FIG. 10 or an isosceles triangle shape as indicated by reference numeral 105D in FIG. Therefore, the detected line is not necessarily perpendicular to the main scanning direction or the sub-scanning direction. Moreover, it does not necessarily need to be a straight line.

  Next, in the fourth embodiment shown in FIG. 12, the x-direction coordinate xc of the center c is calculated using the x-direction coordinate xd1 of the first detected line 108A and the x-direction coordinate xd2 of the third detected line 108C. The y-direction coordinate yc of the center c is obtained using the y-direction coordinate yd1 of the second detected line 108B and the y-direction coordinate yd2 of the fourth detected line 108D. More specifically, as shown in FIG. 16, the y-direction coordinate yd2 of the fourth detected line 108D is detected by sensing (1) in the y-direction of the PW sensor 80 (step S301), and then the x-direction of the PW sensor 80 is detected. The x-direction coordinates xd1 of the first detected line 108A and the x-direction coordinates xd2 of the third detected line 108C are detected by the sensing (2) and (3) (steps S302 and 303). Then, the y-direction coordinate yd1 of the second detected line 108B is detected by sensing (4) in the y-direction (step S304).

Accordingly, by detecting the coordinates xd1, xd2, yd1, and yd2, the x-direction coordinate xc of the center c can be obtained by (xd1 + xd2) / 2 as shown in step S305 of FIG. yc can be obtained by (yd1 + yd2) / 2.
Here, as described above, the x-direction coordinate xc of the center c is obtained on the basis of the two positions of the position of the first detected line 108A and the position of the third detected line 108C. The y-direction coordinate yc of c is obtained on the basis of the two positions of the position of the fourth detected line 108D and the position of the second detected line 108B, so that when detecting each detected line, Even when the detection accuracy is lowered, the error can be reduced (halved).

  Further, since the sub-scan feed of the tray 100 is unidirectional, the amount of sub-scan feed is small, and it is not necessary to switch the forward / reverse rotation of the transport drive roller 30, so the gear in the power transmission system Therefore, the position of the second detected line 108B or the fourth detected line 108D can be detected more accurately. However, the present invention is not limited to this, and it is of course possible to detect the position of the second detected line 108B or the fourth detected line 108D by sub-scan feed in two directions as shown in FIG.

  In this way, in this embodiment, the center c is located between the first detected line 108A and the third detected line 108C, and the second detected line 108B and the fourth detected line 108 Since the center c is located between the detected line 108D and the tray 100, the center c is located between the first detected line 108A and the third detected line 108C. In addition, management is performed so that the center c is positioned between the second detected line 108B and the fourth detected line 108D.

  In both cases of the third and fourth embodiments described above, the carriage 33 and the carriage 33 are transported so that the trace line of the PW sensor 80 does not cross the projection 103 as in the first and second embodiments already described. Since the drive roller 31 is driven and controlled, the movement amount of the carriage 33 and the sub-scan feed amount of the tray 100 can be reduced, and the detection accuracy of the x-direction coordinate xc and the y-direction coordinate yc of the center c can be further reduced. And the sensing time for obtaining the x-direction coordinate xc and the y-direction coordinate yc of the center c can be greatly shortened.

  The detected portions 105 </ b> A to 105 </ b> D described above are formed on the convex portion 103 in the present embodiment, but may be provided at any location on the tray main body 101. However, since the detected portions 105A to 105D are provided on the convex portion 103, the distance between the center c and the detected portions 105A to 105D is shortened. Can be prevented.

[Other Embodiments of Tray]
Hereinafter, another embodiment of the tray 100 will be described with reference to FIGS. 17 to 20. Here, FIGS. 17 to 20 are plan views of trays according to other embodiments. 17 to 20, the same components as those of the tray 100 described above are denoted by the same reference numerals, and description thereof will be omitted below.
In the trays 100A to 100H shown in FIGS. 17 to 20, the detected part 105A is arranged outside the set part 102, not inside the set part 102 (fitting part 103).

  Among them, the trays 100A, 100B, 100C, and 100D shown in FIGS. 17A and 17B and FIGS. 18A and 18B, respectively, have a position of the detected portion 105A in the main scanning direction of the set portion 102. A position deviating from the center position and the center position in the sub-scanning direction and within the formation range of the set portion 102 in the main scanning direction (the trays 100B and 100C correspond) or within the formation range of the set portion 102 in the sub-scanning direction ( Trays 100A, 100B, 100C, and 100D), or in the forming range of the set portion 102 in both the main scanning direction and the sub-scanning direction (the trays 100B and 100C correspond).

  That is, since the tray 100 has a square shape in plan view and the set portion 102 has a circular shape in plan view, the tray 100 has a circular shape in plan view. A surplus space is formed within the formation range of the set portion 102 in the scanning direction. Therefore, by arranging the detected portion 105A using such surplus space, it is possible to prevent an increase in the size of the tray when the detected portion 105A is disposed outside the set portion 102.

  On the other hand, in the trays 100E, 100F, 100G, and 100H shown in FIGS. 19A and 19B and FIGS. 20A and 20B, the position of the detected portion 105A is in the main scanning direction of the set portion 102. It is located at the center (corresponding to the trays 100E and 100F) or the center in the sub-scanning direction (corresponding to the trays 100G and 100H).

  Therefore, when the detected portion 105A is the tray 100E or 100F located at the center of the set portion 102 in the main scanning direction, the x-direction coordinate xc of the center c, the first detected line 108A, and the third detected line. The distance to 108C (see FIG. 6) is shortened, and a decrease in detection accuracy of the x-direction coordinate xc of the center c can be prevented.

  When the detected portion 105A is the tray 100G or 100H positioned at the center of the set portion 102 in the sub-scanning direction, the y-direction coordinate yc of the center c, the second detected line 108B, and the fourth detected amount The distance to the line 108D is shortened, and a decrease in detection accuracy of the y-direction coordinate yc of the center c can be prevented.

In the embodiment described above, an example in which the present invention is applied to an ink jet printer has been described. However, the present invention can also be applied to a general liquid ejecting apparatus.
Here, the liquid ejecting apparatus uses an ink jet recording head, and is not limited to a recording apparatus such as a printer, a copying machine, and a facsimile machine that discharges ink from the recording head to perform recording on a recording medium. And a device that ejects a liquid corresponding to the application from a liquid ejecting head corresponding to the ink jet recording head to an ejected medium corresponding to a recording medium, and adheres the liquid to the ejected medium. .
In addition to the recording head, as a liquid ejecting head, a color material ejecting head used for manufacturing a color filter such as a liquid crystal display, and an electrode material (conductive paste) used for forming an electrode such as an organic EL display or a surface emitting display (FED) Examples thereof include an ejection head, a bioorganic matter ejection head used for biochip production, and a sample ejection head as a precision pipette.

DESCRIPTION OF SYMBOLS 1 Inkjet printer, 3 recording means, 4 conveyance roller, 5 discharge roller, 7 tray guide, 30 conveyance drive roller, 31 conveyance driven roller, 33 carriage, 36 recording head, 57 main scanning drive unit, 58 head drive unit, 59 sub Scan drive unit, 60 drive control unit, 64 PF motor, 73 CR motor, 100 tray, 101 tray body, 102 set unit, 103 convex portion, 105A to 105D detected unit, 108A first detected line, 108B second Detected line, 108C third detected line, 108D fourth detected line, P recording paper

Claims (11)

A carriage having a recording head for recording on a recording medium;
A carriage motor for driving the carriage;
A sensor provided at a position facing the recording medium in the carriage and detecting a difference in light reflectance of the recording medium;
A conveyance drive roller that is rotated and conveys the conveyance medium to the recording head by nipping and rotating the conveyance medium, and a conveyance driven roller that is driven to rotate while being pressed against the conveyance drive roller. Transported rollers,
A transport drive roller motor that rotationally drives the transport drive roller;
A controller for controlling the carriage motor and the conveyance drive roller motor,
The tray which to forming a plate shape, a recording apparatus that is configured to be able to transport by the transport roller,
The tray is formed by a boundary line between regions having different light reflectances, and a first detected line that intersects the main scanning direction;
A second detected line that intersects the sub-scanning direction and is formed by a boundary line between regions having different light reflectances,
The first detected line and the second detected line are sides constituting one figure, respectively.
When the sensor detects the first detected line and the second detected line, a trace line of the sensor is directed from the outside to the inside of the one figure and crosses the first detected line. Later, so as to cross the second detected line by going from the inside to the outside of the one figure without going out of the area of the one figure .
Or, toward the inside from the outside of the plane figure, after crossing the second detected line, the first from the inside of subsequently said plane figure without departing from the plane figure in the region by outward The control unit controls the conveyance drive roller motor and the carriage motor so as to cross the detected line.
A recording apparatus. 2. The recording apparatus according to claim 1, wherein a distance from a center coordinate of the one figure to the first detected line and a distance to the second detected line are stored in a memory in advance. A recording device. A carriage having a recording head for recording on a recording medium;
A carriage motor for driving the carriage;
A sensor provided at a position facing the recording medium in the carriage and detecting a difference in light reflectance of the recording medium;
A conveyance drive roller that is rotated and conveys the conveyance medium to the recording head by nipping and rotating the conveyance medium, and a conveyance driven roller that is driven to rotate while being pressed against the conveyance drive roller. Transported rollers,
A transport drive roller motor that rotationally drives the transport drive roller;
A controller for controlling the carriage motor and the conveyance drive roller motor,
A recording apparatus configured to be able to convey a tray having a plate shape by the conveyance roller,
In the tray, a first detected line and a third detected line that intersect with the main scanning direction, which are formed by boundaries between regions having different light reflectances,
A second detected line and a fourth detected line that intersect with the sub-scanning direction and are formed by boundary lines of regions having different light reflectances;
The first to fourth detected lines are sides constituting one figure,
The trace line of the sensor when detecting the first to fourth detected lines by the sensor does not go through the rotation direction switching of the transport drive roller motor, the fourth detected line, The control unit controls the transport drive roller motor and the carriage motor so as to cross the first detected line, the third detected line, and the second detected line in this order.
A recording apparatus. 4. The recording apparatus according to claim 3, wherein a center coordinate in the main scanning direction of the figure is obtained based on coordinates of the first detected line and the third detected line, and the second detected line. And a center coordinate in the sub-scanning direction of the one figure based on the coordinates of the fourth detection line. The recording apparatus according to any one of claims 1 to 4,
The tray includes a tray main body and a set portion formed on the tray main body on which a thin plate-like body as a recording medium can be set.
The set portion is provided with a fitting portion that fits into a fitting hole formed in the recording medium,
The recording apparatus according to claim 1, wherein the one figure is formed in the fitting portion. The recording apparatus according to any one of claims 1 to 4,
The tray includes a tray main body and a set portion formed on the tray main body on which a thin plate-like body as a recording medium can be set.
The recording apparatus according to claim 1, wherein the one figure is formed outside the set portion. A carriage having a recording head for recording on a recording medium;
A carriage motor for driving the carriage;
A sensor provided at a position facing the recording medium in the carriage and detecting a difference in light reflectance of the recording medium;
A conveyance drive roller that is rotated and conveys the conveyance medium to the recording head by nipping and rotating the conveyance medium, and a conveyance driven roller that is driven to rotate while being pressed against the conveyance drive roller. Transported rollers,
A transport drive roller motor that rotationally drives the transport drive roller;
A controller for controlling the carriage motor and the conveyance drive roller motor,
A tray configured to include a tray main body having a plate shape and a set portion formed on the tray main body capable of setting a thin plate-like body as a recording medium, and configured to be transportable by the transport roller. A device,
The set portion is provided with a fitting portion that fits into a fitting hole formed in the recording medium,
In the fitting portion, a first detected line and a third detected line that intersect with the main scanning direction, which are formed by boundary lines of regions having different light reflectances,
A second detected line that intersects the sub-scanning direction and is formed by a boundary line between regions having different light reflectances,
The first to third detected lines are sides constituting one figure,
From the inside of the one figure, the trace line of the sensor when the first to third detected lines are detected by the sensor does not come off from the fitting portion, and starts from the inside of the one figure. Crossing the first detected line and the third detected line by going to both sides,
Next, the control unit returns to the inside of the one figure without detaching from the fitting part and crosses the second detected line by going from the inside to the outside of the one figure, and the controller drives the transport drive roller motor and Controlling the carriage motor;
A recording apparatus. 8. The recording apparatus according to claim 5 , wherein the set portion has a symmetrical shape in the main scanning direction and the sub-scanning direction, and the fitting portion is a center position of the set portion in the main scanning direction and the sub-scanning direction. Provided in the
Tray characterized by that. The recording apparatus according to any one of claims 1 8, detected line is orthogonal to the main scanning direction intersecting the main scanning direction, and orthogonal detected line intersecting the sub-scanning direction and the subscanning direction Have
A recording apparatus. The recording apparatus according to any one of claims 1 to 9 , wherein the recording apparatus is configured to calculate a reference position for executing recording based on a detection result of each detected line.
A recording apparatus. The recording apparatus according to claim 10 , wherein the recording medium has a symmetrical shape in a main scanning direction and a sub-scanning direction, and the reference position is a central position in the main scanning direction and the sub-scanning direction of the recording medium. is there,
A recording apparatus.

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