JP2005170570A - Recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a medium feeding device equipped with a supporting means for media capable of feeding the media certainly without interference with a guide means for media, a recording device equipped with the feeding device, and a liquid jetting device. <P>SOLUTION: The recording device is equipped with the supporting means 141e to support the leading edge of each medium when it is fed and the guide means 141c movable in the direction perpendicular to the medium feeding for guiding one side edge of the medium being fed. The supporting means is accommodated under the guide means when it makes movement. Accordingly the leading edge of the medium is supported when it is fed, the medium can be prevented from sinking, and no interference is made when the guide means is in movement, which eliminates the labor to remove and facilitates handling. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a feeding device that feeds a medium, a recording apparatus including the feeding device, and a liquid ejecting apparatus.

  When printing on paper as a medium using an ink jet printer that is one of the recording devices, the paper stacked and stored in the paper feed tray is aligned with its leading end abutting against the abutting portion, and is cam-driven. It is lifted by the hopper and brought into contact with the paper feed roller. Then, the uppermost sheet is separated from the lower layer sheet by the separation pad / paper return member and fed to the recording unit by the sheet feeding roller. On the other hand, the lower layer paper is returned to the hopper by the separation pad / paper return member.

JP-A-10-181904

  In the conventional ink jet printer described above, when the paper feed roller pulls the paper onto the separation pad / paper return member, the paper may fall under the hopper and bend and become unusable. Therefore, a sag prevention member may be attached to the hopper, but a guide for guiding the side edge of the paper is movably attached to the hopper so as to be compatible with various sizes of paper. It is necessary to remove the sagging prevention member.

  The present invention has been made in view of the above-described various problems, and an object of the present invention is to provide a feeding device including a medium supporting unit that can reliably feed a medium without interfering with the medium guiding unit. Another object of the present invention is to provide a recording apparatus and a liquid ejecting apparatus including the feeding apparatus and the feeding apparatus.

  In order to achieve the above object, the feeding device according to the present invention is a feeding device for feeding a medium, and supports the leading end of the medium when feeding the medium, and feeds the medium. And a guide means that is movable in the direction orthogonal to the feeding direction to guide one side edge of the medium when feeding, and the support means is stored below the guide means when the guide means moves. It is characterized by that. As a result, since the leading end of the medium is supported when the medium is fed, it is possible to prevent the drop, and since there is no interference during the movement of the guide means, it is not troublesome to remove and easy to handle.

  The support means is pivotably attached to a moving surface of the support means, and is pressed by the guide means and stored below the guide means. This eliminates the need for a drive unit for storing the support means, thereby simplifying the configuration of the support means. Further, the supporting means is characterized by being flush with the moving surface of the guiding means when stored. Thereby, when the support means is not used, the medium can be fed with high accuracy without interfering with the medium.

  In order to achieve the above object, the recording apparatus of the present invention is a recording apparatus for recording on a medium, and is characterized by including each of the feeding devices. The liquid ejecting apparatus of the present invention is a liquid ejecting apparatus that ejects liquid onto an ejection target medium, and includes the above-described feeding devices. Thereby, it is possible to provide a recording apparatus and a liquid ejecting apparatus that exhibit the above-described effects.

  FIG. 1 is a perspective view of an overall appearance configuration of an ink jet printer that is one of recording apparatuses according to an embodiment of the present invention, as viewed obliquely from the front. The ink jet printer 100 is a desktop large-sized printer that can print on so-called cut paper and roll-shaped paper having a relatively large size, for example, JIS standard A4 size to JIS standard A2 size. The housing 101 is covered with a substantially rectangular parallelepiped housing 101 extending in the width direction.

  A rectangular window portion 102 is formed on the upper surface of the housing 101. The window 102 is covered with a transparent or translucent window cover 103. The window cover 103 is attached so as to be rotatable in the direction of the arrow a in the figure around the upper rotation shaft. The user can perform maintenance work of the internal mechanism through the window portion 102 by lifting the window cover 103 and opening the window portion 102.

  On both sides of the front surface of the housing 101, cartridge storage portions 104 into which a plurality of ink cartridges are inserted and removed are formed. Each ink cartridge stores ink of each color for printing. Each cartridge housing portion 104 is covered with a transparent or translucent cartridge cover 105. The cartridge cover 105 is attached so as to be rotatable in the direction of the arrow b shown in the figure around a rotation shaft at the lower part thereof. The user can perform an ink cartridge replacement operation or the like by lightly pressing the cartridge cover 105 to release the locking portion and opening the cartridge storage portion 104.

  An operation unit 110 for instructing a printer operation is disposed on an upper portion of the cartridge housing unit 104 on the right side of the front surface of the housing 101. The operation unit 110 displays buttons 111 such as a power system for turning on / off the power, an operation system for operating a cueing of a paper sheet or operating ink flushing, a processing system for performing image processing, and the like. A liquid crystal panel 112 and the like are provided. The user can operate the button 111 while looking at the liquid crystal panel 112 for confirmation.

  A tank housing portion 106 into which the waste liquid tank 120 is inserted and removed is formed at the lower part of the cartridge housing portion 104 on the right side of the front surface of the housing 101. The waste liquid tank 120 stores waste ink that is discarded when the recording head 162 (see FIG. 5) is cleaned or when the ink cartridge is replaced. By pulling out the waste liquid tank 120, the user can perform a work of discarding the waste ink accumulated inside.

  On the back surface of the housing 101, a paper feed unit 130 that feeds roll-shaped paper is disposed so as to protrude rearward from the upper part. A roll paper holder (not shown) capable of setting one roll-shaped paper is disposed inside the paper supply unit 130, and a flip-up-type openable and rollable roll paper cover 131 is provided on the front surface of the paper supply unit 130. Is attached so as to cover a roll paper holder (not shown). The user can perform operations such as attaching / removing roll paper by lifting the roll paper cover 131 and opening the paper supply unit 130. Note that the upper surface of the roll paper cover 131 is formed as a paper feed guide surface capable of manually feeding the cut paper.

  Between the front center of the housing 101, that is, between the pair of cartridge storage portions 104, a paper supply / discharge tray 200 on which cut sheets before printing and cut sheets after printing or roll-shaped sheets are stacked is inserted and removed. A paper feed / discharge unit 140 including the characteristic part of the present invention is formed. The paper supply / discharge unit 140 is also formed so that thick paper that cannot be bent during conveyance can be manually fed.

  A front portion of the paper supply / discharge tray 200 is inserted into the paper supply / discharge portion 140 and fixed so that the rear portion of the paper supply / discharge tray 200 protrudes. The paper supply / discharge tray 200 is formed in a cassette type, and cut sheets to be fed before printing are stacked and stored therein, and cut sheets to be discharged after printing or roll-shaped are placed on the top. Sheets are stacked and placed. The detailed structure of such a paper supply / discharge tray 200 will be described below with reference to FIGS.

  FIG. 2 is a perspective view of the entire external configuration of the paper feed / discharge tray 200 as viewed obliquely from the front. The paper feed / discharge tray 200 includes a paper feed tray 210 formed in a box shape and a paper discharge tray 230 formed in a lid shape covering the upper surface of the paper feed tray 210. The paper supply / discharge tray 200 is formed to be extendable and retractable in the paper supply / discharge direction, and can be stored compactly when not in use, and corresponds to cut sheets of various sizes when used. It is possible.

  3 and 4 are perspective views showing the paper supply / discharge unit 140 with the paper supply / discharge tray 200 mounted thereon. When the cut sheets are stacked and placed, as shown in FIG. 3, the roll paper guide unit 240 is stored in the upper surface of the paper discharge member 239a, that is, the upper surface of the paper discharge member 239a is flat. As a result, the cut sheet discharged through the sheet discharge roller 155 (see FIG. 5) has a side surface and a bottom surface of the guide portion 145 having an L-shaped cross section and upper surfaces of the sheet discharge members 239a to 239d. Are smoothly stacked and placed on the sheet receiving surface formed by

  Note that a sponge mat 145 a is attached to the bottom surface of the guide portion 145. The sponge mat 145a is configured such that when the second cut sheet is ejected after the first cut sheet is placed, the leading end of the second cut sheet is the first sheet. It has a non-slip function for preventing the cut sheet from sticking out and falling off the sheet receiving surface.

  On the other hand, when stacking roll-shaped sheets, as shown in FIG. 4, on the other long side of the first guide plate 241 of the roll sheet guide 240 stored on the upper surface of the sheet discharge member 239a. The user puts his finger and turns it backward. Then, the second guide plate 242 is pulled by the first guide plate 241, the one end side in the longitudinal direction is lifted, and the other end side in the longitudinal direction is along the groove 239aa formed on the upper surface of the paper discharge member 239a. Slide backwards. Then, the first guide plate 241 is turned until the angle formed by the first guide plate 241 and the second guide plate 242 becomes an acute angle.

  Thus, the second guide plate 242 has a slide-like shape in which one end side in the longitudinal direction is close to the top of the side surface of the guide portion. For this reason, even if the roll-shaped paper discharged through the paper discharge roller is curled, the leading end thereof is not caught in the guide portion side, and the leading end is a slide-like second guide plate. It slides on 242 and is guided to the upper surface side of the paper discharge members 239a to 239d. Therefore, the roll-shaped paper is smoothly stacked and placed on the paper discharge receiving surface formed by the second guide plate 242 and the upper surfaces of the paper discharge members 239a to 239d.

  FIG. 5 is a cross-sectional side view showing an outline of the internal configuration of the ink jet printer 100 of FIG. In the housing 101, a paper feed / discharge unit 140 including a characteristic portion of the present invention, a transport unit 150, a recording unit 160, and the like are disposed. The paper feed / discharge unit 140 is provided with a hopper 141, a paper feed roller 142, a separation unit 43, and the like, which are characteristic parts of the present invention for feeding cut paper.

  The hopper 141 is formed in a flat plate shape on which a cut sheet can be placed. One end of the hopper 141 is located in the vicinity of the paper feed roller 142 and the separation unit 43 and the other end of the paper feed / discharge tray 200 is mounted. It is disposed so as to be located in the vicinity of the bottom surface of the paper feeding unit 210. The hopper 141 has the other end of the compression spring 144 attached at one end to the bottom surface of the housing 101 on the back surface at one end side, and the one end side pivots around the other end side by the expansion and contraction of the compression spring 144. It is arranged like this.

  The paper feed roller 142 is formed in a D shape with a part of a cross section cut out, and rotates intermittently to frictionally convey the cut paper on the hopper 141. The separation unit 43 frictionally separates the lower-layer cut paper from the upper-layer cut paper when the paper cut by the paper feed roller 142 is double-fed. Here, the relationship between the cut sheet placed on the hopper 141 and the paper feed roller 142 will be described with reference to the drawings.

  FIG. 6 is a diagram illustrating a contact state between the cut sheet placed on the hopper 141 and the paper feed roller 142. FIG. 6A shows a case where the maximum number of cut sheets P is placed on the hopper 141. In this case, when the hopper 141 is raised, the uppermost cut sheet P1 is fed to the paper feed roller. It adjusts so that it may not contact the notch part of 142 but may contact at least the circumference after the circular arc start point 142a.

  FIG. 6B shows a case where the minimum number (one) of cut sheets P1 is placed on the hopper 141. In this case, when the hopper 141 is lifted, the cut sheets P1. Is adjusted so as to come into contact with a point 142b slightly rotated from the arc start point 142a of the paper feed roller 142. The contact point 142b has a circumferential length from the contact point 142b to the arc end point 142c equal to the distance a from the leading edge ps of the paper P1 to the contact point 151a between the sub roller 151 and its driven roller 152a. This is the point.

  By adjusting as described above, when the number of the cut sheets P placed on the hopper 141 is equal to or less than the maximum number, the leading edge ps of the uppermost cut sheet P1 is moved to the sub roller 151 and its driven roller 152a. The cut paper P1 is not released from the paper feed roller 142 until it reaches the contact point 151a, so that the cut paper P1 can be reliably delivered to the sub-roller 151, and a paper feed error can be eliminated.

  The transport unit 150 includes a sub roller 151 for transporting paper and its driven rollers 152a, 152b, and 152c, a paper feed roller 153 and its driven roller 154, a paper discharge roller 155, a jagged roller 156, and a detection sensor 157a for detecting the paper. 157b and the like are provided. The sub roller 151 sandwiches the cut sheet together with the driven rollers 152a, 152b, and 152c and reverses it into a U-shape in order to discharge the cut sheet fed from the sheet feeding tray 210 to the sheet discharge tray 230. It is designed to be transported. Further, the sub-roller 151 sandwiches and conveys the roll-shaped paper together with the driven roller 152c in order to eject the roll-shaped paper fed from the paper feeding section 130 to the paper ejection section 230. .

  The paper feed roller 153 sandwiches the cut paper that has been reversely conveyed or the roll-shaped paper that is fed together with the driven roller 154 and feeds it to the platen 163. The paper discharge roller 155 sandwiches the paper passing through the platen 163 together with the jagged roller 156 and discharges the paper onto the paper discharge tray 230. The detection sensor 157a detects the transport amount when the skew of the cut paper that is fed is taken. The detection sensor 157b is configured to detect a conveyance amount when cueing a cut sheet that is reversely conveyed or a roll-shaped sheet that is conveyed.

  In the recording unit 160, a carriage 161, a recording head 162, and the like are disposed. The carriage 161 is connected to a carriage belt (not shown). When the carriage belt is actuated by a carriage driving device (not shown), the carriage 161 is entrained by the movement of the carriage belt and is guided by a guide shaft (not shown) to reciprocate. .

  The recording head 162 is, for example, a plurality of black ink recording heads that eject two types of black ink, and a plurality of color inks that respectively eject six colors of yellow, dark yellow, cyan, light cyan, magenta, and light magenta. And a recording head. The recording head 162 is provided with a pressure generating chamber and a nozzle opening connected to the pressure generating chamber. The size of the recording head 162 is controlled from the nozzle opening toward the sheet by storing ink in the pressure generating chamber and pressurizing the ink with a predetermined pressure. Ink droplets are discharged.

  FIG. 7 is a perspective view showing a detailed configuration of the paper feeding / discharging unit 140 including the characteristic part of the present invention, and FIGS. 8 and 9 are a plan view and a side view thereof. The hopper 141 includes a flat support surface 141a that supports the surface of the cut paper, and a right edge guide having an L-shaped cross section that guides both side edges of the cut paper supported by the support surface 141a. 141b, a left edge guide (guide means) 141c, and a guide lower (support means) 141e for supporting the leading edge of the cut paper supported by the support surface 141a.

  The right edge guide 141b on the right side when viewed from the front is fixedly attached to the right side of the support surface 141a, and the left edge guide 141c on the left when viewed from the front is fixed to the right side from the left side of the support surface 141a. It is slidably attached toward the side. By sliding the left edge guide 141c, it is possible to reliably support sheets from A4 size to A2 size of the JIS standard and accurately guide both side edges thereof.

  Further, the entire edge portion of the bent portion of the right edge guide 141b is guided in contact with the right end portion of the cut sheet, and the edge guide is formed as a step on the back side of the bent portion of the left edge guide 141c. 141d is configured to partially abut on the left end of the cut sheet and guide it. That is, the edge guide 141d is formed on the left side of the sheet cut from the bent portion of the left edge guide 141c so that the left end of the cut sheet does not contact the entire bent portion of the left edge guide 141c. It has a function of separating the end portions.

  When the cut paper is fed by the paper feed roller 142, if the both ends of the cut paper are guided in contact with all the bent portions of the edge guides 141b and 141c, the cut paper is cut. The frictional resistance generated between the both end portions of the paper sheet and the bent portions of both edge guides 141b and 141c becomes too large, and there is a possibility that paper feeding or poor feeding such as jamming may occur. However, by providing such an edge guide 141d, the right edge of the cut sheet is guided in contact with the entire bent portion of the right edge guide 141b, and the left edge of the cut sheet Since the guide is partially in contact with the edge guide 141d, the frictional resistance is reduced, and it is possible to prevent poor feeding such as paper folding and jamming.

  Two guide lowers 141e are attached to the approximate center of the support surface 141a at a predetermined interval. The guide lower 141e is formed in a rectangular flat plate shape. One end of the guide lower 141e is pivotally supported by the lower portion of the support surface 141a and the other end is disposed so as to face the feeding direction. By providing such a guide lower 141e, when the paper is about to fall below the hopper 141, the paper is prevented from being bent. Further, a protrusion is formed on the back surface of the other end of the guide lower 141e, and is higher than the support surface 141a when the other end of the guide lower 141e faces the feeding direction. As a result, the leading edge of the paper can be reliably pressed against the auxiliary roller 147, so that paper can be fed with high accuracy.

  Further, the guide lower 141e is swung left and right around one end and is accommodated in a recess 141f formed in the support surface 141a. A spring is attached to one end of the guide lower 141e so that the other end normally faces the feeding direction. As a result, even if the left edge guide 141c is slid on the support surface 141a when the other end of the guide lower 141e is facing the feeding direction, the side portion of the left edge guide 141c is not moved as shown in FIG. The side portion of the guide lower 141e is pressed and turned to house the guide lower 141e in the recess 141f. After the left edge guide 141c passes through the recess 141f, the guide lower 141e is automatically turned by the spring force and the other end is directed in the feeding direction. Therefore, the left edge guide 141c does not interfere with the guide lower 141e, and the left edge guide 141c can be smoothly slid and positioned on the support surface 141a without removing the guide lower 141e. Further, when the guide lower 141e is housed in the recess 141f, the other end of the guide lower 141e is flush with the support surface 141a. This does not adversely affect the feeding of the paper placed on the support surface 141a.

  Two of the paper feed roller 142 and the separation unit 43 are integrally disposed on the right edge guide 141b and the left edge guide 141c, respectively. That is, each paper feed roller 142 is inserted into both sides of a paper feed roller shaft 146 whose both ends are pivotally supported by the side frame 107, and mounted on the frames 141ba and 141ca extending from the respective edge guides 141b and 141c. Has been. In addition, each separation unit 43 is disposed below each paper feed roller 142 and is mounted on the back side of each edge guide 141b, 141c.

  The paper feed roller 142 and separation unit 43 provided in the right edge guide 141b are fixedly attached to the right side of the support surface 141a, and the paper supply roller 142 and separation unit provided in the left edge guide 141c. 43 is slidably attached from the left side to the right side of the support surface 141a. The conventional paper feed roller is disposed so as to feed only one side of the cut paper and is formed to have a relatively narrow width. However, the paper feed roller 142 is provided on both sides of the cut paper. It is arranged so as to feed paper and has a relatively wide width. As a result, the overall pressure can be increased while lowering the surface pressure per unit area applied from the paper supply roller 142 to the paper surface during paper supply, so a relatively wide cut paper, for example, A2 size paper according to JIS standards. Paper can be fed straight, and damage to the printing-dedicated paper by the paper feed roller 142 can be suppressed.

  In addition, two auxiliary rollers 147 are disposed between the two paper feed rollers 142 at a predetermined interval. Between the three shafts of the rollers 142 and 147, compression springs 148 having at least the same sides are inserted. Since the auxiliary roller 147 can hold down the intermediate portion of the cut paper to be fed, it can be straightened to prevent a relatively wide cut paper, for example, a JIS standard A2 size paper from being bent in the width direction. Paper can be fed.

  In addition, since each compression spring 148 urges each roller 142, 147 in the axial direction, when the left edge guide 141c is slid on the support surface 141a and the left feed roller 142 is moved, Accordingly, each auxiliary roller 147 also moves while linearly changing between the axes of the rollers 142 and 147. Therefore, it is possible to prevent the bending by reliably pressing the intermediate portion of the paper of various sizes.

  10 to 12 are a perspective view, a front view, and a side view showing details of the paper feed roller 142 and the separation unit 43, respectively. The separation unit 43 includes a separation pad 149 having elasticity to be separated by contact with a sheet, and a pad support 143 that supports the separation pad 149. The upper surface 143a of the pad support 143 is formed as an inclined surface that rises from the upstream side of the paper feed toward the downstream side of the paper feed, and a convex portion 143aa is formed on the downstream side of the paper feed.

  The separation pad 149 is placed on the upper surface 143a of the pad support 143, and only the upstream side of the paper feed is pasted with, for example, a double-sided adhesive tape or an adhesive, and the downstream side of the paper feed is supported by the convex portion 143aa, and the tip is a pad It protrudes from the support base 143. A space 149 a is formed between the part of the separation pad 149 that is attached by the double-sided adhesive tape or adhesive and the support part by the convex part 143 aa and the upper surface 143 a of the pad support 143.

  According to such a configuration, as shown in FIG. 12, when the paper feed roller 142 rotates and contacts and presses the separation pad 149 of the separation unit 43, the separation pad 149 curves toward the space 149a and feeds paper. The roller 142 is wound around. Accordingly, since the separation pad 149 can be separated by long contact with the paper that is being fed, the paper can be reliably separated.

  A separation wall 143c is formed at the boundary between the front surface 143b and the upper surface 143a of the pad support 143. When the cut sheet pulled out by the sheet feed roller 142 is double fed, it is separated into one uppermost layer by the separation wall 143c or the separation pad 149 according to the type, that is, the thickness. ing.

  The separation wall 143c is formed such that the right separation pad 149 has a height at the top of the right end side, and the left separation pad 149 has a height at the top of the left end that is slightly higher than the height of the top of the middle. . The reason why it is formed in such a shape is that, at the beginning, the minimum gap between the top of the separation wall 143c and the peripheral surface of the paper feed roller 142 does not allow a large number of plain papers, that is, thin cut sheets, to enter the gap. It was set to be such a distance.

  However, in the case of a stiff cut paper, that is, a thick cut paper, it has been found that a large number of papers enter the gap, so the gap is set to be narrower (about 1 mm). As a result, it was possible to prevent the entry of a large number of thick cut sheets, but there was a problem with thin cut sheets. That is, the thin cut paper often has its both sides curved upward due to its weakness, so that the central portion of the thin cut paper can enter the gap, There are cases where both side portions are obstructed by the paper feed roller 142 and cannot enter the gap. In this case, since only the central portion of the cut sheet is pulled, both sides are bent or cut.

  Therefore, the height of the top portion on the right end side of the separation wall 143c of the right separation pad 147 and the height of the top portion on the left end side of the separation wall 143c of the left separation pad 147 are slightly higher than the height of the top portion on the middle side. By forming the separation wall 143c, the intrusion of a large number of thick cut sheets is prevented on the right end side and the left end side of the separation wall 143c, and both sides of the thin cut sheet are curved upward. It also allows you to get in smoothly.

  An operation when printing on a sheet cut by the ink jet printer 100 in such a configuration will be described. The cut paper P stacked and stored in the paper feed tray 210 of the paper feed / discharge tray 200 attached to the paper feed / discharge unit 140 is a compression spring 144 in which the paper bundle is mechanically synchronized with the rotation of the paper feed roller 142. The hopper 141 is lifted by the restoration and the action of the guide lower 141 e is pressed against the paper feed roller 142, and only the uppermost cut sheet P is separated by the separation unit 43 and fed to the conveyance unit 150.

  Then, as shown in FIG. 13A, when the cut sheet P to be fed reaches the contact point 151a between the sub roller 151 and the driven roller 152a, the cut sheet P is skewed. This skew removing method is different depending on the sheet thickness. That is, in the case of a thin cut sheet of plain paper or less, the front end of the cut sheet is slightly bitten between the sub-roller 151 and its driven roller 152a, and then the rollers 151 and 152a are reversed and cut. By bending the cut paper, a method is adopted in which the front ends of the cut paper are aligned and the skew is removed.

  On the other hand, in the case of paper that has been cut thicker than plain paper, the leading edge of the cut paper is abutted against the contact point 151a between the sub-roller 151 and its driven roller 152a, and the paper feed roller 142 is slipped. A method of removing skew by aligning the leading ends of the paper is employed. The amount of biting and the amount of butting are detected by the detection sensor 157a, and the skew removal is controlled according to the detection amount.

  In this way, the skew removal method varies depending on the paper thickness because the thin cut paper is not stiff, and the paper feed roller 142 sends out the cut paper without slipping on the cut paper. This is because the thick cut paper has a structure in which the thin cut paper is bonded, and may peel off when the rollers 151 and 152a are reversed. is there.

  The cut sheet P after the skew removal is sandwiched between the sub-roller 151 and its driven rollers 152a, 152b, and 152c driven by a paper feed motor (not shown) and reversed in the U-shaped path, that is, opposite to the paper feeding direction. Conveyed in the direction. Then, as shown in FIG. 13B, when the leading edge of the cut paper P reaches the detection position DP of the detection sensor 157b, cueing that is the printing start positioning of the cut paper P is performed.

  That is, the leading edge of the cut paper P is conveyed by the detection sensor 157b from the detection position DP until it reaches the cueing position HP shown in FIG. 14A through the paper feed roller 153 and its driven roller 154. The amount is detected, and cueing is controlled according to the detected amount. The conventional cueing is performed by the detection sensor 157a disposed on the upstream side of the sub-roller 151, but this cueing is performed by the detection sensor 157b disposed on the downstream side of the sub-roller 151. The amount can be reduced, and particularly the cueing error due to the paper thickness can be eliminated and the cueing accuracy can be improved.

  After that, the cut sheet P for which the cueing has been completed is nipped by a paper feed roller 153 driven by a paper feed motor (not shown) and its driven roller 154 and conveyed to the recording unit 160. Therefore, the nipping of the cut paper P by the sub roller 151 and its driven rollers 152a, 152b, and 152c causes the conveyance accuracy to deteriorate, so that each of the driven rollers 152a, 152b, and 152c as shown in FIG. Releases from the sub-roller 151.

  The cut sheet P to be conveyed is sucked and flattened on a platen 163 by a suction pump (not shown), and is printed by a recording head 162 mounted on a carriage 161 scanned by a carriage motor (not shown) and a timing belt. . At this time, the control unit of the ink jet recording apparatus 100 supplies each color ink to the recording head 162 from a total of seven ink cartridges, for example, yellow, dark yellow, magenta, light magenta, cyan, light cyan, and black. By controlling ejection timing and driving of the carriage 161 and the paper feed roller 153, highly accurate ink dot control, halftone processing, and the like are executed. The cut paper P that has been printed is sandwiched between a paper discharge roller 155 and a knurled roller 156 driven by a paper feed motor (not shown), and is discharged to the paper supply / discharge unit 140. The paper is stacked on the paper discharge tray 230.

  As described above, according to the paper feeding / discharging unit 140 of the present embodiment, the guide lower 141e protrudes in the paper feeding direction and supports the leading end of the paper when feeding the paper, thereby preventing the paper from dropping. At the same time, the left edge guide 141c is stored and does not interfere with the movement of the left edge guide 141c. Further, since the guide lower 141e is pivotably attached via a spring, a driving unit for performing a storing operation is unnecessary, and the configuration can be simplified. Further, since the guide lower 141e is flush with the moving surface of the left edge guide 141c when stored, the guide lower 141e does not interfere with the sheet when not in use and can feed the sheet with high accuracy.

  Any recording apparatus provided with a feeding apparatus can be applied to, for example, a facsimile apparatus and a copying apparatus. In addition to the 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 matter 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 of an overall appearance configuration of an ink jet printer that is one of recording apparatuses according to an embodiment of the present invention, viewed obliquely from the front. FIG. FIG. 2 is a perspective view of a paper supply / discharge tray of the printer of FIG. 1. It is a perspective view which shows the usage condition of the paper supply / discharge tray of FIG. It is a perspective view which shows another usage pattern of the paper supply / discharge tray of FIG. FIG. 2 is a cross-sectional side view illustrating an outline of an internal configuration of the printer of FIG. 1. It is a figure which shows the contact state of the paper and paper feed roller on a hopper. FIG. 2 is a perspective view showing details of a paper supply / discharge section of the printer of FIG. 1. FIG. 8 is a first plan view of FIG. 7. FIG. 8 is a second plan view of FIG. 7. It is a perspective view which shows the detail of the principal part of the paper feeding / discharging part of FIG. It is a front view of FIG. It is a side view of FIG. FIG. 2 is a first diagram illustrating a paper conveyance state of the printer of FIG. 1. FIG. 4 is a second diagram illustrating a paper conveyance state of the printer of FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Inkjet printer, 101 Housing, 104 Cartridge storage part, 105 Cartridge cover, 110 Operation part, 111 button, 112 Liquid crystal panel, 130 Paper feed part, 140 Paper supply / discharge part, 141 Hopper, 141c Left edge guide, 141e Guide lower, 141f Concave portion, 142 Feed roller, 143 Pad support base, 143aa Convex portion, 147 Auxiliary roller, 148 Compression spring, 149 Separation pad, 149a Space, 150 Transport portion, 160 Recording portion, 200 Feed / discharge tray, 210 Feed tray , 230 Output tray

Claims (5)

A feeding device for feeding a medium,
A support means for supporting the tip of the medium when feeding the medium;
A guide means that is movable in a feeding orthogonal direction for guiding one side end of the medium when feeding the medium;
The feeder is characterized in that the support means is stored below the guide means when the guide means moves. 2. The feeding device according to claim 1, wherein the support unit is pivotally attached to a moving surface of the support unit, and is pressed by the guide unit and stored below the guide unit. Feeding device. The feeding device according to claim 1, wherein the support unit is flush with a moving surface of the guide unit when stored. A recording device for recording on a medium,
A recording apparatus comprising the feeding device according to claim 1. A liquid ejecting apparatus that ejects liquid onto a medium to be ejected,
A liquid ejecting apparatus comprising the feeding device according to claim 1.

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