JP2006225132A - Carrying control method and recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a carrying control method capable of controlling highly accurate carrying without depending on the medium width in a direction perpendicular to the carrying direction, and a recording device and liquid injection device capable of controlling the carrying control method. <P>SOLUTION: A control part 200 of the carrying control method calculates a correction value of the carrying amount, based on the width of the medium in the direction perpendicular to the carrying direction. That is, a ratio of a difference between the width of the medium to be carried and the maximum width of the medium with respect to predetermined length is calculated, and a product of this ratio and a correction ratio of the width of the medium per predetermined length is calculated. In addition, a sum of this product and the maximum correction value of the carrying amount of the media is calculated, to determine the correction value of the carrying amount. Therefore, since the difference of the carrying amount of the media caused by the difference of the width of media in the direction perpendicular to the carrying direction is directly corrected, highly accurate carrying can be performed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a transport control method for controlling transport of a medium, and a recording apparatus and a liquid ejecting apparatus that can control the transport control method.

  As a recording medium, for example, there is an ink jet printer which is one of large recording apparatuses capable of recording even relatively large size paper such as JIS standard A0 size and JIS standard B0 size. This ink jet printer scans a carriage of a recording unit while discharging a sheet by a paper feed roller of a transfer unit, and discharges ink from a recording head for recording. Accordingly, the sheet conveyance accuracy greatly affects the recording accuracy. Normally, there are plain paper, glossy paper, and the like, but since the surface states of these papers are different, the friction coefficient with the paper feed roller also differs. For this reason, a high correction accuracy is maintained by setting a correction value for the conveyance amount for the paper type (see Patent Document 1).

JP 2004-188801 A

  In the above-described ink jet printer, since the width of the recordable paper in the orthogonal direction of conveyance is large, for example, from 13 inches to 44 inches, the conveyance amount by the paper feed roller also varies greatly, and the conveyance amount depends on the type of paper. The recording accuracy cannot be ensured only by setting the correction value.

  The present invention has been made in view of the various problems as described above, and an object thereof is a conveyance control method capable of controlling high-precision conveyance without being influenced by the width of the medium in the orthogonal direction of conveyance, and the method thereof. An object of the present invention is to provide a recording apparatus and a liquid ejecting apparatus that can be controlled by a transport control method.

  In order to achieve the above object, a transport control method for controlling transport of a medium according to the present invention is characterized in that a correction value for a transport amount is obtained based on a width of the medium in a direction perpendicular to the transport. Thereby, since the difference in the conveyance amount of the medium due to the difference in the width in the medium conveyance orthogonal direction is directly corrected, highly accurate conveyance can be performed.

  Further, the conveyance amount correction value is obtained based on a correction ratio of the width of the medium to be conveyed with respect to the reference width of the medium. That is, a ratio of a difference between the width of the medium to be transported with respect to a predetermined length and a reference width of the medium is obtained, and a product of the ratio and a correction factor of the width of the medium per predetermined length is obtained. It is characterized in that a sum with a reference transport amount correction value of the medium is obtained and used as the transport amount correction value. The reference medium is the largest medium. Thereby, an accurate correction value of the conveyance amount of the medium due to the difference in the width in the medium conveyance orthogonal direction can be obtained. The carry amount correction value is set for each type of the medium. Accordingly, it is possible to obtain a more accurate correction value for the transport amount of the medium in consideration of the friction coefficient of the surface which is different for each type of medium. And the conveyance control program which can be performed with the computer provided with each said control step is realizable.

  In order to achieve the above object, a recording apparatus for recording on a recording medium according to the present invention is characterized by comprising conveying means for conveying the recording medium and control means for controlling each control step. Thereby, a recording apparatus that exhibits the above-described actions can be provided. In addition, a liquid ejecting apparatus that ejects liquid onto an ejection target medium includes a transport unit that transports the ejection target medium and a control unit that controls each of the control steps. Thus, a liquid ejecting apparatus that exhibits the above-described actions can be provided. The recording apparatus and the liquid ejecting apparatus include a carriage on which detection means is mounted, and the detection means detects the width of the medium by movement of the carriage.

  FIG. 1 is a perspective view showing a configuration example of a printer that is one of recording apparatuses according to an embodiment of the present invention, FIG. 2 is a perspective view showing an internal configuration example of a main part of the printer, and FIG. FIG. 4 is a schematic cross-sectional side view of the printer, and FIG. A printer 100 shown in FIGS. 1 and 2 is a large-sized ink jet printer capable of recording even on a relatively large size recording sheet such as JIS standard A0 size or JIS standard B0 size. The section 120, the transport section 210, the paper discharge section 130, and the leg section 140 are arranged in this order from the top. And the control part 200 which controls the recording part 120 and the conveyance part 210 is incorporated. The paper feed unit 110 is configured to be separable from the integrated recording unit 120, the transport unit 210, and the paper discharge unit 130, which are configured as a printer body. The printer main body is configured to be separable from the leg 140.

  As shown in FIG. 1, the paper feeding unit 110 is provided so as to protrude to the upper rear side of the recording unit 120. As shown in FIG. 2, a roll paper holder 111 on which two roll papers (paper sheets) can be set is provided obliquely up and down inside the paper feed unit 110. As shown in FIGS. 1 and 2, a flip-up roll paper cover 112 that can be opened and closed is attached so as to cover the roll paper holder 111.

  As shown in FIG. 2, the roll paper holder 111 includes a spindle 113 that holds the roll paper, and a pair of spindle receivers 114 that are attached to the inner surfaces of both side walls of the paper feeding unit 110 so that the spindle 113 can be attached and detached. 115. Then, after the roll paper is mounted at the center, both ends of the spindle 113 are mounted on the spindle receivers 114 and 115 so that the spindle 113 is rotatably supported. As shown in FIGS. 1 and 2, the roll paper cover 112 is rotatably supported at the upper part, and is opened and closed by lifting or pushing down the lower part.

  As shown in FIG. 2, the recording unit 120 includes a carriage 122 on which the recording head 121 is mounted, a flexible flat cable (hereinafter referred to as FFC) 123 that connects the recording head 121 and a control unit (not shown) for performing recording, An ink tube 124 that connects the recording head 121 and an ink cartridge (not shown) containing ink, a paper feed roller (not shown) that conveys the roll paper in the sub-scanning direction, and a paper suction means (not shown) that prevents the roll paper from lifting up are provided. Yes. As shown in FIGS. 1 and 2, an upper lid 125 and a front lid 126 are attached to the upper surface and the front surface of the recording unit 120 so as to cover the recording head 121, the carriage 122, and the like.

  The recording head 121 includes a black ink recording head that discharges black ink and a plurality of color ink recording heads that discharge ink of each color such as yellow, light cyan, cyan, light magenta, and magenta. The recording head 121 is provided with a pressure generation chamber and a nozzle opening connected to the pressure generation chamber. The size of the recording head 121 is controlled from the nozzle opening toward the roll paper by storing ink in the pressure generation chamber and pressurizing it with a predetermined pressure. Ink droplets are discharged.

  As shown in FIG. 2, the carriage 122 is suspended from a rail 127 provided in the main scanning direction via a roller and connected to the carriage belt 128. The carriage belt 128 is operated by a carriage driving device (not shown). Then, it is accompanied by the movement of the carriage belt 128 and is guided by the rail 127 so as to reciprocate. As shown in FIG. 3, the carriage 122 is provided with detection means 129 such as a photo detector, for example, so that the width of the conveyed paper can be detected.

  One end of the FFC 123 is connected to the connector of the control unit and the other end is connected to the connector of the recording head 121, and a recording signal is sent from the control unit to the recording head 121. The ink tube 124 is provided for ink of each color, and one end of each ink tube is connected to the corresponding ink cartridge via an ink pressure supply unit (not shown), and the other end is connected to the corresponding recording head 121 of each color. It is connected.

  The ink tube 124 sends ink of each color pressurized by the ink pressure supply means from the ink cartridge to the recording head 121. As shown in FIGS. 1 and 2, the front lid 126 is rotatably supported at the lower part, and is opened and closed by pushing down or pushing up the upper part.

  As shown in FIG. 3, the transport unit 210 includes a flat sheet feed guide 211 disposed from the sheet feed unit 110 to the recording unit 120, a paper feed roller 212 and a driven roller 213 that are disposed opposite to each other and can be contacted / separated. A flat platen 214 disposed opposite to the recording head 121 mounted on the carriage 122, a flat paper suction unit 215 disposed from the recording unit 120 to the paper discharge unit 130, and a paper discharge disposed on the paper discharge unit 130. A guide 131 is provided.

  Each surface of the paper feed guide 211 and the paper discharge guide 131 functions as a paper transport surface. The surface of the paper suction unit 215 acts as a paper transport surface and a paper suction surface. That is, as shown in FIG. 4, the paper suction unit 215 includes a plurality of suction ports 215a, 215b, and 215c arranged in parallel in the main scanning direction and arranged in three rows in the sub scanning direction, as shown in FIG. As described above, when the outside air is sucked from the suction ports 215a, 215b, and 215c by the fan 217 disposed inside the recording unit 120, the roll paper conveyed on the paper suction unit 215 is adsorbed. ing.

  The surface of the platen 214 functions as a sheet conveyance guide surface and also as a sheet suction surface. That is, as shown in FIG. 4, the platen 214 includes a plurality of suction ports 214 a arranged in parallel in the main scanning direction, and as shown in FIG. 3, by a fan 217 disposed inside the recording unit 120. The outside air is sucked from the suction ports 214a, so that the roll paper conveyed on the platen 214 is sucked. Accordingly, even when the width of the roll paper is particularly wide during recording, the roll paper is reliably sucked and flattened over the entire width on the platen 214, so that the recording accuracy can be maintained with high accuracy.

  Also, as shown in FIG. 4, a gap C is provided between the platen 214 and the suction unit 215, and outside air is sucked from the gap C by a fan 217 disposed inside the recording unit 120 as shown in FIG. By doing so, the roll paper conveyed on the gap C is adsorbed. Accordingly, during recording, the roll paper is also sucked between the platen 214 and the suction unit 215 and becomes flatter by the platen 214, so that the recording accuracy can be maintained at a higher level. The same effect can be obtained by providing a suction port 214a in the platen 214 to suck the roll paper, or providing only one of the gaps C between the platen 214 and the suction unit 215 to suck the roll paper. Play.

  Further, the platen 214 is divided in accordance with the size of the roll paper in the width direction, for example, divided into seven pieces having a width of 4 inches, and an ink absorbing material 216 such as sponge or nonwoven fabric is disposed in each divided portion. ing. In this way, by dividing the platen 214 and disposing the ink absorbing material 216 in each divided portion, the ink that protrudes from the roll paper of all sizes is recorded during borderless recording to be recorded on the entire roll paper. Since it can be absorbed and collected, contamination of the recording head 121 and the roll paper can be prevented.

  As shown in FIGS. 1 and 2, the paper discharge unit 130 includes a paper discharge guide 131 that forms part of a path for transporting roll paper in the sub-scanning direction, and paper discharge (not shown) that transports roll paper in the sub-scanning direction. It has a roller. Further, as shown in FIGS. 1 and 2, a cartridge holder 150 for storing and holding the ink cartridge is disposed on the right side when viewed from the front side of the paper discharge unit 130.

  As shown in FIGS. 1 and 2, the leg portion 140 includes two support columns 142 each having a moving roller 141, and a reinforcing bar (support column) 143 spanned between the support columns 142. It has. The printer main bodies 110, 120, and 130 are placed on the support pillar 142 and fixed with screws.

  As shown in FIG. 3, the control unit 200 includes a main board (not shown) that constitutes a printer controller. The main board is mounted with control elements and storage elements such as CPU, ROM, RAM, and ASIC (not shown) and other various circuit elements. Then, the paper feed unit 110, the recording unit 120, the transport unit 210, and the like constituting the print engine are controlled. Here, as described in the background art, since the large-sized ink jet printer has a large variation in the width of the recordable paper in the direction perpendicular to the conveyance, the conveyance amount by the paper feed roller also greatly varies. If only the correction value of the carry amount is set in the recording accuracy, the recording accuracy may be lowered.

  Therefore, the control unit 200 determines the amount of conveyance by the paper feed roller 212 based on the correction rate of the sheet width to be actually used for the reference sheet width, for example, the maximum sheet width that can be handled by the printer 100. A correction value is obtained and transport control is performed. That is, the control unit 200 obtains the paper width to be transported based on the detection signal from the detection unit 129. Then, the maximum sheet width stored in advance in the ROM or the like is read, and the difference is obtained by subtracting the maximum sheet width from the sheet width to be conveyed.

  Then, the ratio is obtained by dividing the obtained difference by a predetermined length preset in the ROM or the like, for example, 10 inches, and the ratio and the correction ratio of the sheet width per predetermined length stored in the ROM or the like are obtained. To find the product. Then, the calculated product and the maximum paper conveyance amount correction value stored in advance in the ROM or the like are added to obtain a sum to obtain a conveyance amount correction value. Based on this conveyance amount correction value, the conveyance of the paper to be conveyed is performed. To control. It should be noted that the transport amount rounded down when the transport amount is set is taken into consideration for the next transport so that this transport amount does not become a problem during accumulation. Further, the reference paper width is not limited to the maximum paper width, and may be any paper width.

  The maximum sheet width, the predetermined length, the correction ratio of the sheet width per predetermined length, and the maximum sheet conveyance amount correction value are tabulated for each sheet type and stored in advance in a ROM or the like. The conveyance amount correction value may be tabulated for each prescribed sheet width. As a result, the conveyance amount of the sheet can be appropriately corrected according to the sheet and the width, so that highly accurate conveyance can be performed. In particular, since the friction coefficient of the surface which is different for each type of paper is taken into consideration, a more accurate correction value for the conveyance amount of the paper can be obtained.

  In such a configuration, when the ink jet printer 100 is used, first, the spindle 113 constituting the roll paper holder 111 is taken out from the paper supply unit 110, and the roll inserted into the spindle 113 as shown in FIG. The paper presser 113 a is pulled out from one end of the spindle 113.

  Then, as shown in FIG. 6, one end of the spindle 113 is inserted through one end of the shaft hole C of the roll paper R, and one end of the shaft hole C of the roll paper R is inserted into the spindle 113 as shown in FIG. The roll paper presser 113b inserted and fixed on the other end side is fitted and brought into contact therewith. Subsequently, the roll paper presser 113 a is inserted from one end of the spindle 113 and fitted into the other end of the shaft hole C of the roll paper R. Thereby, the roll paper R can be rotated together with the spindle 113.

  Next, as shown in FIG. 8, the both ends of the spindle 113 in which the roll paper R is inserted are inclined with respect to the front-rear direction of the ink jet printer 100, that is, the spindle 113 in which the roll paper R is inserted. The other end side of this is directed to one spindle receiver 114.

  Here, the spindle receiver 114 is configured to be rotatable in the horizontal direction. Normally, the recesses 114a and 115a of the spindle receivers 114 and 115 receiving the end of the spindle 113 are opposed to each other, but the roll paper R is When the inserted spindle 113 is set, as shown in FIG. 9, one spindle receiver 114 is rotated to make an angle of about 45 degrees with respect to the other spindle receiver 115.

  Thereafter, the other end portion of the spindle 113 in which the roll paper R is inserted is put in the recess 114a of one spindle receiver 114, and the spindle receiver 114 is rotated together with the spindle 113 in which the roll paper R is inserted. Then, the recesses 114 a and 115 a of the spindle receivers 114 and 115 are opposed to each other, and one end of the spindle 113 in which the roll paper R is inserted is hung on the recess 115 a of the other spindle receiver 115. Thereby, the spindle 113 with the roll paper R inserted can be easily set in the paper feeding unit 110.

  Next, as shown in FIG. 10, the leading edge of the roll paper R is pulled down and passed through the conveyance path of the recording unit 120, and further, as shown in FIG. 11, to the conveyance path of the paper discharge unit 130. Then, as shown in FIG. 12, the roll paper R is rotated in the winding direction, and the leading end of the roll paper R is positioned at a marker M formed on, for example, the paper discharge guide 131. After that, the ink jet printer 100 is activated, and ink droplets are ejected while moving the recording head 121 in the main scanning direction while feeding the roll paper R in the sub-scanning direction, thereby recording predetermined information on the roll paper R. And then eject it.

  Any recording apparatus that can control the transport control method can be applied to, for example, a facsimile apparatus, a copying apparatus, and the like. In addition to a recording apparatus, the meaning of a liquid ejecting apparatus that ejects a liquid corresponding to its use from a liquid ejecting head onto an ejected medium instead of ink and attaches the liquid to the ejected medium is, for example, a liquid crystal display or the like Color material jet head used for manufacturing color filters, electrode material (conductive paste) jet head used for electrode formation for organic EL display and surface emitting display (FED), bio-organic jet head used for biochip manufacturing, precision pipette The present invention can also be applied to an apparatus equipped with a sample ejection head or the like.

1 is a perspective view illustrating a configuration example of an ink jet printer that is one of recording apparatuses according to an embodiment of the present invention. FIG. 2 is a perspective view illustrating an internal configuration example of a main part of the printer of FIG. 1. FIG. 2 is a schematic sectional side view of the printer of FIG. 1. It is a top view which shows the principal part of FIG. FIG. 2 is a first diagram illustrating a procedure for using the printer of FIG. 1. FIG. 3 is a second diagram illustrating a procedure for using the printer of FIG. 1. FIG. 6 is a third diagram illustrating a procedure for using the printer of FIG. 1. FIG. 6 is a fourth diagram illustrating a procedure for using the printer of FIG. 1. FIG. 10 is a fifth diagram illustrating a procedure for using the printer of FIG. 1. FIG. 7 is a sixth diagram illustrating a procedure for using the printer of FIG. 1. FIG. 9 is a seventh diagram illustrating a procedure for using the printer of FIG. 1. FIG. 9 is an eighth diagram illustrating a procedure for using the printer of FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Inkjet printer, 110 Paper feed part, 111 Roll paper holder, 112 Roll paper cover, 113 Spindle, 114 Roll paper holder, 115 Spindle receiver, 120 Recording part, 121 Recording head, 122 Carriage, 123 FFC, 124 Ink tube, 125 Upper cover, 126 Front cover, 127 Rail, 128 Carriage belt, 129 Detection means, 130 Paper discharge unit, 131 Paper discharge guide, 140 Leg part, 141 Roller, 142 Support pillar, 143 Reinforcing bar, 150 Ink cartridge holder, 200 Control Section, 210 transport section, 212 paper feed roller, 213 driven roller, 214 platen

Claims (9)

A transport control method for controlling transport of a medium,
A transport control method characterized in that a correction value of a transport amount is obtained based on a width of the medium in a transport orthogonal direction. The transport control method according to claim 1, wherein the transport amount correction value is obtained based on a correction rate of the width of the medium to be transported with respect to a reference width of the medium. A ratio of a difference between the width of the medium to be transported with respect to a predetermined length and a width of the reference medium is obtained, and a product of the ratio and a correction factor of the width of the medium per predetermined length is obtained. The transport control method according to claim 1, wherein the transport amount correction value is obtained by calculating a sum of the correction amount and the transport amount correction value of the medium. The transport control method according to claim 2, wherein the reference medium is a maximum medium. The transport control method according to claim 1, wherein the transport amount correction value is set for each type of the medium. A computer-executable transfer control program comprising the control steps according to claim 1. A recording device for recording on a recording medium,
Conveying means for conveying the recording medium;
A recording apparatus comprising: control means for controlling the control step according to claim 1. A liquid ejecting apparatus that ejects liquid onto an ejection target medium,
Conveying means for conveying the ejection target medium;
A liquid ejecting apparatus comprising: control means for controlling the control step according to claim 1. The apparatus according to claim 7 or 8, further comprising a carriage on which detection means is mounted, wherein the detection means detects a width of the medium by movement of the carriage.

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