JP4066185B2 - Tray feed control device, recording device, liquid ejecting device - Google Patents

Description

  The present invention relates to a tray feed for performing feed control of a tray (conveyed medium) on which the optical disk or the like is set in a recording apparatus capable of recording (printing) on a label surface of an optical disk or the like typified by a DVD (digital versatile disc). The present invention relates to a control device and a recording device including the control device. The present invention also relates to a 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 the liquid corresponding to the application from the liquid ejecting head corresponding to the ink jet recording head to the ejected medium corresponding to the recording material, 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.

Some recording apparatuses represented by inkjet printers are capable of recording by directly ejecting ink droplets onto a label surface such as an optical disk typified by a DVD. In such a recording apparatus, An optical disk or the like as a recording medium is set on a tray having a plate shape, conveyed in the recording apparatus while being set on the tray, and recording is performed.
The tray is nipped by a conveyance roller that conveys a recording medium, and the conveyance roller is driven to rotate by receiving the power of a motor such as a DC motor, thereby moving in the recording apparatus. (For example, refer to Patent Document 1).

JP 2002-96514 A

  Here, the tray may be independent from the recording device, and when performing recording on an optical disc or the like, the tray on which the optical disc or the like is set is fed (inserted) to the recording device, and recording may be performed. Although it is possible (see Patent Document 1), the tray is configured integrally with a recording apparatus, and the tray stored inside the recording apparatus is moved out of the recording apparatus by pressing an operation button when executing recording on an optical disc or the like. It is also possible to configure such that it is ejected, that is, sent to a set position where an optical disk or the like can be set.

  In the case of such a configuration, if there is an obstacle at the tray outlet, the tray tip may collide with the obstacle and the tray may not be discharged. At this time, since the tray is nipped by the transport roller, slip occurs between the tray and the transport roller, thereby deteriorating the surface state of the transport roller, and the subsequent normal transport operation of the recording medium. This will cause a problem such as being unable to perform the operation. In particular, when the conveying roller is formed by covering the surface of the metal shaft body with a coating film, the coating film may be peeled off.

  Therefore, the present invention has been made in view of such a problem, and the problem is to prevent slippage between the tray and the conveyance roller, thereby maintaining the state of the conveyance roller appropriately at all times. is there.

  In order to solve the above-mentioned problems, a first aspect of the present invention is a carriage provided with a recording head for recording on a recording medium, and a carriage provided on the carriage and moved by moving the carriage in the main scanning direction. A side-end detecting unit that detects a side-end position of the recording medium, a conveyance driving 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 the conveyance driving A conveyance roller configured to include a conveyance driven roller that is driven to rotate in pressure contact with the roller; a conveyance motor that rotationally drives the conveyance drive roller; a rotation detection unit that detects a rotation amount of the conveyance drive roller; In a recording apparatus comprising: a tray as the medium to be transported, in which a recording medium can be set and has a plate shape that can be fed by the transport roller A tray feed control device for controlling the feed of the tray by controlling the transport motor, wherein the detected portion that can be detected by the side edge detecting means is disposed at a predetermined interval in the sub-scanning direction on the tray. And a plurality of rotations of the conveyance drive roller detected by the rotation detection unit, and when the side edge detection unit detects the detected portion when the tray is conveyed. Comparing with the presence or absence of the generation of the rectangular wave signal, it has a judging means for judging whether or not the tray is being conveyed.

  According to the first aspect, the tray feed control device that controls the feed of the tray is provided with a plurality of side edge detections for detecting the side edges of the recording medium provided at predetermined intervals in the sub-scanning direction on the tray. Using the detected portion that can be detected by the means, the rotation amount of the transport drive roller is compared with the presence or absence of the generation of the rectangular wave signal that is generated when the side edge detecting means detects the detected portion. Therefore, it is determined whether or not the tray is being conveyed. Therefore, a state in which a rectangular wave signal is not generated even when the conveyance motor, that is, the conveyance drive roller is rotating, that is, a state in which the conveyance roller and the tray are slipping is determined. Can be detected. Accordingly, when the slip state is detected, the rotation driving of the transport driving roller is stopped, so that slip between the tray and the transport roller can be prevented and the surface state of the transport driving roller can be appropriately maintained. At the same time, since the side edge detection means as an existing component for detecting the side edge of the recording medium is used, a dedicated sensor or the like is not provided, and the cost is not increased.

According to a second aspect of the present invention, in the first aspect, the side edge detection unit includes a light emitting unit that emits light to the tray and a light receiving unit that receives reflected light from the tray. The portion is a rack that meshes with a pinion gear that is formed at a side edge of the tray and feeds and drives the tray in the sub-scanning direction.
According to the second aspect, the detected part is a rack that is formed at a side end of the tray and meshes with a pinion gear for feeding and driving the tray in the sub-scanning direction. By using an existing component for transporting a simple tray as the detected portion, it is possible to contribute to cost reduction.

According to a third aspect of the present invention, in the second aspect, a marking having a predetermined reflectance is attached to the rack.
According to the said 3rd aspect, since the marking which has a predetermined reflectance is attached | subjected to the said rack, a to-be-detected part can be detected more reliably.

According to a fourth aspect of the present invention, in the first aspect, the side edge detection unit includes a light emitting unit that emits light to the tray and a light receiving unit that receives reflected light from the tray. The portion is a marking having a predetermined reflectance attached to a surface facing the side edge detection means.
According to the fourth aspect, the side edge detection unit includes a light emitting part that emits light to the tray and a light receiving part that receives reflected light from the tray, and the detected part is configured to detect the side edge. Since it is a marking having a predetermined reflectance applied to the surface facing the means, it is possible to reliably detect the detected portion and reliably generate a rectangular wave signal when the tray is conveyed. .

  According to a fifth aspect of the present invention, in any one of the second to fourth aspects, the tray is nipped by the transport roller so that the rack does not contact the transport roller. The rack is formed with a certain level difference with respect to a surface nipped by the transport roller.

  According to the fifth aspect, the tray is formed with a certain level difference with respect to the surface where the rack is nipped by the transport roller so that the rack does not contact the transport roller while being nipped by the transport roller. Therefore, it is possible to prevent noise generated by the rack coming into contact with the transport roller when the tray is nipped by the transport roller and damage to the peripheral surface of the transport roller.

According to a sixth aspect of the present invention, a carriage having a recording head for recording on a recording medium, and a side edge position of the recording medium is detected by a movement operation of the carriage in the main scanning direction. Nipping and rotating the side edge detecting means and the medium to be transported to convey the medium to be transported to the recording head, and a rotationally driven transport driving roller and a rotationally driven contact with the transport driving roller. A conveyance roller configured to include a conveyance driven roller, a conveyance motor that rotationally drives the conveyance drive roller, a rotation detection unit that detects a rotation amount of the conveyance drive roller, and a recording medium can be set. By controlling the tray as the medium to be transported, which forms a plate shape that can be fed by the transport roller, and the transport motor, the tray A tray feed control device that performs feed control, wherein the tray feed control device is the tray feed control device according to any one of the first to fifth aspects. Features.
According to the sixth aspect, the recording apparatus including the tray for setting the recording medium includes the tray feed control device described in any of the first to fifth aspects described above. The same effects as any of the first to fifth aspects described above can be obtained.

  According to a seventh aspect of the present invention, there is provided a carriage including a liquid ejecting head that ejects liquid onto an ejected medium, and a side end position of the ejected medium by a movement operation of the carriage in the main scanning direction. A side end detecting means for detecting the conveyance medium, and a conveyance drive roller that is driven to rotate and conveys the conveyance medium to the liquid ejecting head by niping and rotating the conveyance medium, and the conveyance drive roller A conveyance roller configured to include a conveyance driven roller that is driven to rotate, a conveyance motor that rotationally drives the conveyance drive roller, a rotation detection unit that detects a rotation amount of the conveyance drive roller, and an ejection medium can be set. And controlling the tray as the medium to be transported and the transporting motor, which form a plate shape that can be fed by the transporting roller. A liquid feed apparatus including a tray feed control device that performs feed control of the tray, wherein the detected portion that can be detected by the side edge detection unit is spaced apart from the tray by a predetermined interval in the sub-scanning direction. A rectangular wave signal that is provided by a plurality of rotation signals detected by the rotation detecting means and generated when the side edge detecting means detects the detected portion when the tray is conveyed. It is characterized by having a judging means for judging whether or not the tray is being transported by comparing with the presence or absence of occurrence.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
First, a schematic configuration of an inkjet printer (hereinafter referred to as “printer”) 1 as an example of a “recording apparatus” and a “liquid ejecting apparatus” according to the present invention will be described with reference to FIGS. Here, FIG. 1 is an external perspective view of the printer 1, FIG. 2 is an external perspective view of the printer 1 with the external housing removed, and FIG. 3 is a schematic side sectional view of the printer 1. FIG. 4 is a block diagram of the control unit 50 that performs various controls of the printer 1.

  As shown in FIG. 1, it is assumed that the printer 1 has a box shape, is approximately the size of a video tape recorder, and is used in a state of being stored in a TV rack or the like. It is configured. As shown in the figure, a front cover 8 is provided on the front surface of the box-shaped housing 3 so as to be roughly configured, and the front cover 8 is opened toward the front side (used state: not shown). A closed state (non-use state) is rotatably provided. In the open state, the recording paper on which recording has been performed can be ejected, and the disk tray 33 (see FIG. 2) can be taken in and out. A paper feed tray 30 is detachably provided at the lower portion of the front cover 8, and the recording paper can be set by being pulled out and removed. An ink cartridge unit 15 is provided above the front cover 8, and a plurality of ink cartridges 16 (see FIG. 3) are detachably provided side by side in the width direction of the printer 1.

  Next, the internal configuration of the printer 1 will be outlined with reference to FIGS. In FIG. 2, the apparatus main body of the printer 1 includes a lower chassis 4, a main frame 5 extending in the width direction (main scanning direction) of the apparatus main body, and a depth direction of the apparatus main body standing on both sides of the main frame 5. The base is constituted by the side frame right 6 and the side frame left 7 which are parallel to the (sub-scanning direction). Between the side frame right 6 and the side frame left 7, a main carriage guide shaft 11 and a sub carriage guide shaft 12 extending in the main scanning direction are pivotally supported at a predetermined interval in the sub scanning direction.

  The main carriage guide shaft 11 and the sub carriage guide shaft 12 are guide shafts for guiding the carriage 13 in the main scanning direction, the main carriage guide shaft 11 is inserted through the rear portion of the carriage 13, and the sub carriage guide shaft 12 is the carriage 13. The distance between the recording head 14 (FIG. 3) and the recording paper P (platen gap: hereinafter referred to as “PG”) is defined.

  Next, the transport path of the recording paper P and the disk D as an example of “recorded medium” and “ejected medium” and the disk tray 33 as an example of “transported medium” will be described with reference to FIG. As described above, the printer 1 includes the paper feed tray 30 that is detachable at the bottom of the apparatus. A plurality of recording papers P can be set in a stacked state on the paper feed tray 30, and a hopper 31 is provided at the bottom thereof. The hopper 31 is provided so as to be swingable about a swing shaft 31a, and presses the set recording paper P from below to press the bundle of recording paper P against the feeding roller 28 provided at the top.

  The feeding roller 28 has a substantially D shape in a side view, and the outer periphery is formed by a high friction member (for example, a rubber material). When the recording paper P is fed, the uppermost recording paper P in pressure contact with the arc portion of the feeding roller 28 is fed to the downstream side (the right side in FIG. 3) by the rotation of the feeding roller 28. In addition, friction separating means (not shown) that presses against the arc portion of the feeding roller 28 is provided below the feeding roller 28, and a recording sheet is provided between the friction separating means and the feeding roller 28. By pinching P, the uppermost recording paper P to be fed is separated from the next and subsequent recording papers P to be fed.

On the downstream side of the feed roller 28, there are provided a transport drive roller 21 that is rotationally driven by a transport (PF) motor 64 (see FIG. 4), and a transport driven roller 22 that is driven to rotate in contact with the roller. A pair of rollers is referred to as a “conveyance roller”). The recording paper P is nipped by the conveyance roller and the conveyance driving roller 21 is rotationally driven, whereby the recording paper P is conveyed below the recording head 14. The recording head 14 and the platen 20 are provided on the downstream side of the transport driving roller 21 so as to face each other in the vertical direction. The transported recording paper P is supported by the recording head 14 from the bottom in a state of being supported from below. Recording is performed by ejecting (ejecting) ink droplets as “liquid”. Although the recording head 14 is provided at the bottom of the carriage 13, no ink cartridge is mounted on the carriage 13 that reciprocates in the main scanning direction, and as described above, on the upper side of the main scanning area of the carriage 13. A plurality of ink cartridges 16 are detachably arranged side by side in the main scanning direction. Then, ink is supplied to the carriage 13 via an ink tube (not shown).
On the downstream side of the recording head 14, there are provided a discharge driving roller 23 that is rotationally driven by a PF motor 64, and a discharge driven roller 24 that is driven to rotate in contact with the roller. When the roller 23 is driven to rotate, the recording paper P is discharged out of the printer 1.

  On the other hand, an optical disc D represented by a DVD (Digital Versatile Disk) or the like as a “recording medium” or “ejection medium” can be set. Is arranged. A rack 33a (see FIGS. 2 and 7) is formed at the side end of the disk tray 33, and the pinion gear 37 (see FIG. 7) that meshes with the rack 33a can be moved substantially horizontally and straightly. It is configured. The pinion gear 37 is configured so that a PF motor 64 that drives the conveyance drive roller 21 is used as a drive source, and power transmission from the PF motor 64 to the pinion gear 37 can be selectively performed by a switching unit (not shown). ing.

  The disc tray 33 is transported until the leading end of the tray is nipped between the transport driving roller 21 and the transport driven roller 22 by the rotation of the pinion gear 37, and thereafter the driving force generated by the rotation of the transport driving roller 21 is applied. In response, it is sent downstream or upstream. Further, when the optical disk D is set or taken out, it is sent to the position (discharge position) indicated by the phantom line in FIG. Note that such a disk tray 33 insertion / removal operation can be performed by pressing the tray SW 36 (FIG. 4).

  Next, the configuration of the control unit 50, that is, the control unit 50 as the “tray feed control device” according to the present invention will be described with reference to FIG. The control unit 50 is configured to be able to transmit and receive data to and from the host computer 150 that transmits print information to the printer 1, and has an interface (IF) 51 with the host computer 150, an ASIC 52, a RAM 53, a PROM 54, and an EEPROM 55. CPU 56, timer IC 57, DC unit 58, transport motor (PF motor) driver 61, carriage motor (CR motor) driver 60, and head driver 59.

  The CPU 56 performs arithmetic processing for executing the control program of the printer 1 and other necessary arithmetic processing, and the timer IC 57 causes the CPU 56 to generate periodic interrupt signals necessary for various processing. The ASIC 52 controls the print resolution and the drive waveform of the recording head 14 based on the print data transmitted from the host computer 150 via the IF 51. The RAM 53 is used as a work area for the ASIC 52 and the CPU 56 and a primary storage area for other data. The PROM 54 and the EEPROM 55 store control programs (firmware) necessary for controlling the printer 1 and data necessary for processing. Has been.

  The DC unit 58 is a control circuit for controlling the speed of the DC motor (the CR motor 63 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 58 is based on control commands sent from the CPU 56 and output signals from detection means such as a rotary encoder 68, a linear encoder 69, a paper detector 19 that detects the passage of the recording paper P, and a PW sensor 27. Various calculations for controlling the speed of the DC motor are performed, and signals are sent to the CR motor driver 60 and the PF motor driver 61.

  The PF motor driver 61 drives and controls the PF motor 64 under the control of the DC unit 58. In this embodiment, the PF motor 64 rotates a plurality of driving objects, that is, the feeding roller 28, the conveyance driving roller 21, and the paper discharge driving roller 23 described above, and is further formed at the side end of the disk tray 33. The disk tray 33 is fed by rotating the pinion gear 37 (FIG. 7) that meshes with the rack 33a (FIG. 2).

  The CR motor driver 60 drives the CR motor 63 under the control of the DC unit 58 to reciprocate the carriage 13 in the main scanning direction, or stop and hold it. The head driver 59 drives and controls the recording head 14 according to the print data transmitted from the host computer 150 under the control of the CPU 56.

  The CPU 56 and the DC unit 58 include a detection signal from the paper detector 19 that detects the start and end of the conveyed paper P, and a rotary encoder 68 for detecting the rotation amount, rotation direction, and rotation speed of the PF motor 64. And an output signal from the linear encoder 69 for detecting the absolute position of the carriage 13 in the main scanning direction. The CPU 56 and the DC unit 58 are also given an output signal from the PW sensor 27 as “side end detection means”.

  The PW sensor 27 is an optical sensor provided at the bottom of the carriage 13, and a light emitting unit (not shown) that emits light toward the recording paper P or the disk tray 33, and reflected light from the recording paper P or the disk tray 33. And a light receiving portion (not shown) for receiving the light, detecting the width of the recording paper P by scanning the carriage 13, and recognizing an identification mark (not shown) attached to the disc tray 33. Is used to detect the position of the disk tray 33 in the feed direction. Further, it is also used for detecting the presence or absence of the disk D on the disk tray 33 and detecting the center position of the disk D.

  A rotary encoder 68 as “rotation detecting means” includes a disk-shaped scale 68b having a large number of light-transmitting portions 68c on the outer peripheral portion attached to the pulley 66, and a light-emitting portion (not shown) that emits light to the light-transmitting portions 68c. ) And a detection unit 68a configured to include a light receiving unit (not shown) that receives light that has passed through the light transmitting unit. Here, the pulley 66 is rotationally driven by the PF motor 64 via the endless belt 65. The pulley 66 is formed integrally with a gear 70 having a shaft 67 as a rotation shaft, and the gear 70 meshes with a gear 71 attached to the shaft end of the transport driving roller 21. Accordingly, the power of the PF motor 64 is thereby transmitted to the transport drive roller 21.

  When the disk-shaped scale 68b rotates, the detection unit 68a outputs a rising signal and a falling signal formed by light passing through the light transmitting unit 68c, and the control unit 50 outputs from such a rotary encoder 68. By receiving the signal, the rotation amount, the rotation speed, and the rotation direction of the transport driving roller 21 (PF motor 64) are detected, and thereby the feed control of the target recording paper P or the disc tray 33 can be executed. It can be done.

  Subsequently, the linear encoder 69 has a code plate (not shown) that is long in the main scanning direction and a light emitting unit (not shown) that emits light to a plurality of light transmitting parts (not shown) formed in the main scanning direction on the code plate. (Not shown) and a light receiving part (not shown) that receives light that has passed through the light transmitting part, and outputs a rising signal and a falling signal formed by the light passing through the light transmitting part, The absolute position of the carriage 13 in the main scanning direction is detected.

  The controller 50 also receives signals from the power supply SW 35 and the tray SW 36. The power source SW 35 is an operation switch for putting the printer 1 in a hibernation state (power off state), and the tray SW 36 is an operation switch for taking in and out the disk tray 33. When these switches are pressed, a signal indicating that the switches are pressed is transmitted to the control unit 50, and necessary control is executed.

The above is the outline of the printer 1, and the control when the tray SW 36 is pressed will be described with reference to FIGS. 5 and 6. Here, FIG. 5 is a flowchart showing the control contents when the tray SW 36 is pressed, and FIG. 6 is an explanatory diagram showing each position of the disc tray 33.
In FIG. 5, when a pressing signal for the tray SW 36 is input (Yes in step S101), the current tray position is determined (step S102). Here, the tray position includes a storage position shown in FIG. 6 (A), a discharge position shown in FIG. 6 (B), and a cueing position shown in FIG. 6 (C). The storage position shown in FIG. 6A is a position where the disk tray 33 is sent to the most upstream side (left side in FIG. 3 / upper side in FIG. 6). When the disk tray 33 is in the storage position, the paper feed cassette Paper feed from 30 (FIG. 2) can be executed. The discharge position shown in FIG. 6B is a position where the disk tray 33 is sent to the most downstream side (the right side of FIG. 3 / the lower side of FIG. 6), and when the disk tray 33 is in the discharge position, The disc D can be set on the tray 33. The cueing position shown in FIG. 6C is the first position when recording on the disk D is started.

Next, when the current position is at the storage position or the cueing position, the disk tray 33 is moved to the ejection position (step S107). Accordingly, the user can set the disk D on the disk tray 33 or take out the set disk D.
On the other hand, when the current position is at the ejection position, disc center detection control is executed (step S103). The disk center detection control uses the PW sensor 27 (FIG. 4) provided at the bottom of the carriage 13 to execute the main scanning by the movement of the carriage 13 and the sub-scanning by the rotation of the transport driving roller 21 while performing the disk D. It is control which calculates | requires the center position. Thus, by directly obtaining the center position of the disk D from the set disk D, the position of the disk D can be accurately grasped, and recording to the disk D can be performed accurately.

  Here, when it is determined that the disk D is not set as a result of executing the disk center detection control (Yes in step S104), it is not necessary to perform the recording operation on the disk D. 33 is moved to the storage position (step S106). On the other hand, when the disc D is set on the disc tray 33 (No in step S104), the disc tray 33 is sent to the cueing position in preparation for the recording operation on the disc D (step S105). Thereby, when the recording data is received later, the recording operation can be started promptly.

  The above is the control when the tray SW 36 (FIG. 4) is pressed. Next, with reference to FIGS. 7 to 12, the determination means for determining whether or not the disk tray 33 is normally conveyed is described in detail. To do. 7 is a plan view of the disk tray 33, FIG. 8 is a diagram showing a rectangular wave (current) generated by the PW sensor 27 and the rotary encoder 68, and FIGS. 9 and 10 are flowcharts showing the control contents of the determination means. 11 and 12 are plan views of a disk tray 33 according to another embodiment.

  FIG. 7 shows a case where the rack 33 a is used as the “detected portion” detected by the PW sensor 27. When the carriage 13 having the PW sensor 27 determines whether or not the disk tray 33 is normally conveyed, the carriage 13 is positioned so that the PW sensor 27 and the rack 33a face each other as shown in FIG. To the position where you want to stop). In this state, when the disc tray 33 is conveyed in the sub-scanning direction (vertical direction in FIG. 7), the tooth portion and the missing tooth portion of the rack 33a alternately pass through the PW sensor 27, so that the PW sensor 27 receives light. The reflected light changes, and a rectangular wave is generated by the rising signal and the falling signal as shown in the conveyance section of FIG. On the other hand, if the disc tray 33 is not transported, the reflected light received by the PW sensor 27 does not change, and no rectangular wave is generated as shown in the transport stop section of FIG.

  On the other hand, the rotary encoder 68 that detects the rotation amount of the transport drive roller 21 also detects the rotation of the transport drive roller 21 (PF motor 64) to generate a rectangular wave as shown in FIG. Here, in a state where the rotary encoder 68 detects the rotation of the transport driving roller 21 to generate a rectangular wave and the PW sensor 27 generates a rectangular wave, the disk tray 33 is rotated by the rotation of the transport driving roller 21. Although the rotary encoder 68 detects the rotation of the transport drive roller 21 to generate a rectangular wave, the PW sensor 27 detects the rectangular wave. When the disk tray 33 does not occur, a slip occurs between the transport driving roller 21 and the disk tray 33 due to a collision with an obstacle, and it can be determined that the disk tray 33 is not transported (see FIG. 8 conveyance stop section). Thus, the control unit 50 as the tray feed control device compares the input signal from the PW sensor 27 with the input signal from the rotary encoder 68 to determine whether or not the disc tray 33 is being conveyed. have. The determination means is constructed by software in this embodiment and stored in the PROM 54 (FIG. 4).

  Hereinafter, the determination unit will be described in detail with reference to FIGS. 9 and 10. First, the rotary encoder pulse counters n1 and n2 are set to zero (steps S201 and 202), the PW sensor pulse interval is set to k (k: constant) (step S203), and the tray error flag flg is set to zero (steps). S204), and the total number of rotary encoder pulses is set to r (r: constant). Here, the rotary encoder pulse counters n1 and n2 are counters that count the pulses shown in FIG. 8B (rising signal and falling signal: hereinafter referred to as “pulses”), and the PW sensor pulse interval k is A predetermined margin is added to the number of pulses of the rotary encoder 68 (number of pulses in FIG. 8B) corresponding to a half period (interval m) of the rectangular wave of the PW sensor 27 shown in FIG. Value. The tray error flag flg is a flag indicating whether or not the disk tray 33 is normally conveyed. “0” indicates a state where the disk tray 33 is normally conveyed, and “1” indicates that the disk tray 33 is conveyed. The figure shows a state in which slip occurs between the transfer drive roller 21 and the conveyance drive roller 21. Further, the total number r of rotary encoder pulses is the number of pulses necessary for transporting the disk tray 33 to the discharge position (FIG. 6B) by the transport driving roller 21. The PW sensor pulse interval k, the rotary encoder total pulse r, and the tray error flag flg are stored in the EEPROM 55, and the tray error flag flg is updated as necessary.

  Next, the PF motor 64 is rotated forward (step S205), the conveyance of the disk tray 33 is started, and a pulse input from the rotary encoder 68 is awaited (step S207). When a pulse is input from the rotary encoder 68 (Yes in step S207), it is determined in step S208 in FIG. 10 whether the pulse counter n1 is smaller than the PW sensor pulse interval k (step S208). Then, it is determined whether or not a pulse from the PW sensor 27 has been input (step S209). When the pulse from the PW sensor 27 is input (Yes in step S210), the rotary encoder pulse counter n1 is reset to zero (step S210), and when the pulse from the PW sensor 27 is not input (in step S210). In the negative branch, “1” is added to the rotary encoder pulse counter n1 (step S211). In this way, every time there is a pulse input from the PW sensor 27, the rotary encoder pulse counter n1 is reset to zero.

  Next, “1” is added to the rotary encoder pulse counter n2 (step S211). Since the rotary encoder pulse counter n2 is a counter for knowing the total rotation amount of the transport driving roller 21, the rotary encoder pulse counter n2 is incremented by 1 in this way and is not reset to zero. When the rotary encoder pulse counter n2 reaches the predetermined value r, it can be determined that the disc tray 33 has been correctly transported to the discharge position (FIG. 6B), and the process returns to the upper control routine.

  On the other hand, returning to step S208, if the pulse counter n1 exceeds the PW sensor pulse interval k (negative branch), the pulse input from the PW sensor 27 is not necessary as shown in the conveyance stop section of FIG. Since it can be determined that the conveyance drive roller 21 is rotating, that is, a slip has occurred between the disk tray 33 and the conveyance drive roller 21, the PF motor 64 is stopped (step S214), and the tray error flag flg is set. It is set to “1” indicating the occurrence of abnormality (step S215), and the process returns to the upper control routine.

  As described above, the control unit 50 as the tray feed control device uses the rack 33a as the detected portion provided in the disk tray 33, and the rotation amount of the transport driving roller 21 (the number of pulses of the rotary encoder 68). It is determined whether or not the disk tray 33 is being transported by comparing the presence or absence of a rectangular wave signal generated by the PW sensor 27 detecting the rack 33a. Since the PF motor 64 is stopped when a slip occurs between the disk tray 33 and the transport driving roller 21, even if the disk tray 33 collides with some obstacle, the disk drive 33 is located between the disk tray 33 and the transport driving roller 21. Slip can be prevented, and the surface state of the transport drive row 21 is not deteriorated. Further, since the PW sensor 27 as an existing component is used, a dedicated sensor or the like is not provided, and the cost is not increased.

  13 is a perspective view of the disk tray 33, and FIG. 14 is an enlarged side view of the printer 1 in a state where the disk tray 33 is nipped between the transport driving roller 21 and the transport driven roller 22.

  A substantially donut-shaped groove 33b for mounting the disk D is formed in the disk tray 33. The conveyance driven roller 22 is pivotally supported so as to be driven to rotate by the conveyance driven roller holder 221, and the conveyance driven roller holder 221 is urged toward the conveyance driving roller 21 by an urging means (not shown). 22 is pressed against the conveyance drive roller 21. The disc tray 33 is nipped between the transport drive roller 21 and the transport driven roller 22 so that the rack 33a formed on the side end portion does not come into contact with the transport drive roller 21 and the transport driven roller 22 as illustrated. Thus, a rack 33a is formed with a certain level difference B on each surface nipped by the transport driving roller 21 and the transport driven roller 22. As a result, when the disk tray 33 is nipped between the transport drive roller 21 and the transport driven roller 22 and transported in the sub-scanning direction Y, the rack 33a comes into contact with the transport drive roller 21 and the transport driven roller 22. It is possible to prevent the generated noise and the peripheral surfaces of the transport driving roller 21 and the transport driven roller 22 from being damaged.

  The discharge driven roller 24 is rotatably supported by a discharge driven roller holder 243, and the discharge driven roller holder 243 is supported to be swingably supported by the shaft 242 as a swing shaft. It is disposed on the frame 241. The discharge driven roller 24 has a plurality of teeth around it, and when the recording paper P is discharged, the tip of each tooth is pointed on the recording surface of the recording paper P while being pressed against the recording surface of the recording paper P. It is a toothed roller sharply sharpened so as to contact and rotate. On the other hand, when the disk tray 33 is transported, if the paper discharge driven roller 24 is driven and rotated while being pressed against the disk D, the teeth of the paper discharge driven roller 24 may damage the disk D. The frame 241 is swung to a position where it is retracted from the conveyance path of the disk tray 33 by a rocking means (not shown) (reference A), and the paper discharge driven roller 24 is moved to the disk D mounted on the disk tray 33 being conveyed. It is designed not to touch.

  In addition, by attaching the marking 38 as shown in FIG. 11 to the rack 33a, the difference in reflectance becomes more remarkable, and the PW sensor 27 can detect it more reliably. Further, as an alternative to the rack 33a, a plurality of markings 39 may be provided at a predetermined interval in the sub-scanning direction (vertical direction in FIG. 12) as shown in FIG. In this case, for example, the disc tray 33 is black and the marking 39 is white. As a result, a difference in reflectance occurs, and the PW sensor 27 can generate a rectangular wave.

  The present invention relates to a tray feed for performing feed control of a tray (conveyed medium) on which the optical disk or the like is set in a recording apparatus capable of recording (printing) on a label surface of an optical disk or the like typified by a DVD (digital versatile disc). The present invention can be used for a control device and a recording device including the control device. Further, the present invention can be used for a liquid ejecting apparatus.

1 is an external perspective view of a printer according to the present invention. 1 is an external perspective view of an apparatus main body of a printer according to the present invention. 1 is a schematic side sectional view of a printer according to the present invention. 3 is a block diagram of a control unit of the printer according to the present invention. FIG. It is a flowchart which shows the control content at the time of tray SW depression. It is explanatory drawing which shows each position of a disk tray. It is a top view of a disk tray. It is a figure which shows a rectangular wave electric current. It is a flowchart which shows the control content of a determination means. It is a flowchart which shows the control content of a determination means. It is a top view of the disc tray concerning other embodiments. It is a top view of the disc tray concerning other embodiments. It is a perspective view of a disk tray. 1 is an enlarged side view of a printer according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inkjet printer, 3 Housing, 4 Lower chassis, 5 Main frame, 6 Side frame right, 7 Side frame left, 8 Front cover, 11 Main carriage guide axis, 12 Subcarriage guide axis, 13 Carriage, 14 Recording head, 15 Ink Cartridge unit, 16 ink cartridge, 19 paper detector, 20 platen, 21 transport drive roller, 22 transport driven roller, 23 paper discharge drive roller, 24 paper discharge driven roller, 27 PW sensor, 28 paper feed roller, 30 paper feed cassette , 31 Hopper, 33 Disc tray, 33a Rack, 35 Power switch, 36 Tray SW, 37 Pinion gear, 38 Marking, 39 Marking, 50 Control part, 51 IF, 52 ASIC, 53 RAM, 54 PROM, 5 5 EEPROM, 56 CPU, 57 Timer IC, 58 DC unit, 59 Head driver, 60 Carriage (CR) motor driver, 61 Conveyance (PF) motor driver, 63 Carriage (CR) motor, 64 Conveyance (PF) motor, 65 Endless belt, 66 pulley, 67 shafts, 68 rotary encoder, 69 linear encoder, 70, 71 gear, D disk, P recording paper

Claims (7)

A carriage having a recording head for recording on a recording medium;
A side edge detecting means provided on the carriage for detecting a side edge position of the recording medium by moving the carriage in the main scanning direction;
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 motor for rotationally driving the transport drive roller;
Rotation detection means for detecting the rotation amount of the conveyance drive roller;
In a recording apparatus that can set a recording medium and that has a plate shape that can be fed by the conveyance roller, and a tray as the conveyance medium, the tray is controlled by controlling the conveyance motor. A tray feed control device for performing the feed control of
The tray is provided with a plurality of detected portions that can be detected by the side edge detection means at a predetermined interval in the sub-scanning direction, and the rotation amount of the transport driving roller detected by the rotation detection means, Judgment to determine whether or not the tray is being transported by comparing the presence or absence of the generation of a rectangular wave signal that is generated when the side edge detection means detects the detected portion when the tray is transported A tray feed control device characterized by comprising means. In Claim 1, the said side edge detection means is equipped with the light-emitting part which light-emits to the said tray, and the light-receiving part which light-receives the reflected light from the said tray, and is comprised,
The tray feed control device according to claim 1, wherein the detected part is a rack that is formed at a side end of the tray and meshes with a pinion gear for feeding and driving the tray in the sub-scanning direction. 3. The tray feed control device according to claim 2, wherein a marking having a predetermined reflectance is attached to the rack. In Claim 1, the said side edge detection means is equipped with the light-emitting part which light-emits to the said tray, and the light-receiving part which light-receives the reflected light from the said tray, and is comprised,
The tray feed control device according to claim 1, wherein the detected portion is a marking having a predetermined reflectance that is applied to a surface facing the side edge detection means. 5. The tray according to claim 2, wherein the tray is in a state where the rack is nipped by the transport roller so that the rack does not come into contact with the transport roller while being nipped by the transport roller. The tray feed control device is characterized by being formed with a certain level difference. A carriage having a recording head for recording on a recording medium;
A side edge detecting means provided on the carriage for detecting a side edge position of the recording medium by moving the carriage in the main scanning direction;
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 motor for rotationally driving the transport drive roller;
Rotation detection means for detecting the rotation amount of the conveyance drive roller;
A tray as the medium to be transported, which is capable of setting a medium to be recorded and has a plate shape that can be fed by the transport roller;
A tray feeding control device that controls the feeding of the tray by controlling the conveying motor, and a recording apparatus comprising:
6. The recording apparatus according to claim 1, wherein the tray feed control device is the tray feed control device according to any one of claims 1 to 5. A carriage including a liquid ejecting head that ejects liquid onto the ejection target medium;
Side end detection means provided on the carriage for detecting the side end position of the ejection target medium by moving the carriage in the main scanning direction;
A conveyance drive roller that is rotated and conveys the medium to be conveyed to the liquid jet head by nipping and rotating the medium to be conveyed, and a conveyance driven roller that is driven to rotate in pressure contact with the conveyance drive roller. A configured transport roller;
A transport motor for rotationally driving the transport drive roller;
Rotation detection means for detecting the rotation amount of the conveyance drive roller;
A tray as the medium to be transported, which is capable of setting a medium to be ejected and has a plate shape that can be fed by the transport roller;
A tray feed control device that controls the feed of the tray by controlling the transport motor, and a liquid ejecting apparatus comprising:
The tray is provided with a plurality of detected portions that can be detected by the side edge detection means at a predetermined interval in the sub-scanning direction, and the rotation amount of the transport driving roller detected by the rotation detection means, Judgment to determine whether or not the tray is being transported by comparing the presence or absence of the generation of a rectangular wave signal that is generated when the side edge detection means detects the detected portion when the tray is transported A liquid ejecting apparatus comprising: means.

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