JP2012166510A - Liquid ejecting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid ejecting apparatus that can obtain high printing quality by stabilizing the posture of a recording medium even in performing marginless printing.SOLUTION: The liquid ejecting apparatus includes: a medium supporting member 214 for supporting the recording medium 214; a liquid ejecting head for ejecting liquid to the recording medium R supported by the medium supporting member 214; and a liquid receivable unit that is provided at a side of a supporting surface 214a of the recording medium R in the medium supporting member 214 and can switch a liquid receiving state for receiving the liquid existing outside an edge of the recording medium R and a medium supporting state for supporting a back surface of the recording medium R.

Description

  The present invention relates to a liquid ejecting apparatus.

  The ink jet recording apparatus includes a recording head that ejects ink droplets onto a recording sheet that is a recording medium, and a platen that supports the recording sheet and defines the position of the recording sheet with respect to the recording head. Among such ink jet recording apparatuses, there is an ink jet recording apparatus that can perform so-called borderless recording in which recording is performed on a recording sheet without a margin (for example, see Patent Document 1). The platen for performing borderless recording has a structure including a rib that supports recording paper and a groove that receives the discarded ink at the time of marginless recording, for example, an absorbing material that absorbs ink or a channel for discarding ink. . Also, the ribs that support the recording paper stabilize the posture of the paper by sucking the recording paper.

JP 2007-237664 A

  However, the platen of the above-described recording apparatus cannot provide the rib in the portion where the ink discard groove is present, and cannot stably support the recording paper. For this reason, when the portion corresponding to the ink discarding groove is located on the back side of the recording paper, the recording paper cannot be supported, and the recording paper swells due to the ink ejected from the recording head, causing the paper to be undulated called cockling. End up. The swollen recording paper has a problem that the flatness of the ink landing surface is lowered, so that the landing accuracy of the ink ejected from the recording head is disturbed and the printing quality is lowered. Therefore, in particular, in the platen that supports borderless printing on a plurality of types of recording paper, cockling occurs at a plurality of locations, and there is a risk that printing unevenness may become significant.

  The present invention has been made in view of such circumstances, and provides a liquid ejecting apparatus capable of obtaining high recording quality by stabilizing the posture of a recording medium even when performing borderless recording. For the purpose.

  In order to solve the above problems, a liquid supply system of the present invention includes a medium support member that supports a recording medium, a liquid ejecting head that ejects liquid onto the recording medium supported by the medium support member, and the medium. A liquid receiver provided on a support surface side of the recording medium in the support member and capable of switching between a liquid receiving state for receiving the liquid removed from an edge of the recording medium and a medium supporting state for supporting the back surface of the recording medium. And a possible portion.

  According to the liquid ejecting apparatus of the present invention, the liquid receivable portion can switch between the liquid receiving state and the medium supporting state when performing borderless recording of the recording medium. Therefore, when the liquid receivable portion corresponds to the edge of the recording medium, it can receive the liquid that is off the edge. Further, when the liquid receivable portion corresponds to the back surface of the recording medium, the recording medium can be stably supported. Accordingly, the liquid receivable portion receives the liquid at the edge of the roll paper, and stably supports the recording medium on the back surface of the recording medium to suppress the occurrence of cockling, and the liquid landing accuracy on the recording medium. Can be improved. Thereby, obtaining a good print quality is highly reliable.

In the liquid ejecting apparatus, the medium support member can be supported in a state in which the recording medium is sucked, and the liquid receivable portion can be supported in the state in which the recording medium is sucked in the medium support state. It is preferable.
According to this configuration, since the liquid receivable portion can support the recording medium in a sucked state, the recording medium can be supported in a more stable state.

In the liquid ejecting apparatus, the liquid receivable portion includes a rotation portion that is rotatably provided on the medium support member. The support state is preferably switchable.
According to this configuration, the liquid receiving state and the medium support state can be reliably switched by a simple configuration in which the rotating unit is rotated.

Further, in the liquid ejecting apparatus, the rotating portion can support the liquid receiving port that receives the liquid separated from the edge of the recording medium in the liquid receiving state, and the recording medium in the medium supporting state. It is preferable to have a medium support portion.
According to this configuration, it is possible to reliably switch between a state in which the liquid receiving port can receive the liquid and a state in which the medium support unit can support the recording medium by rotating the rotating unit.

Further, in the liquid ejecting apparatus, the liquid receivable portion includes the liquid collection portion capable of collecting the liquid received by the liquid reception port, and the recording medium via a suction port provided in the medium support portion. A first connecting path that communicates with the liquid receiving port and connects the liquid receiving port and the liquid recovery unit when in the liquid receiving state. Preferably, a second connection path is formed which communicates with the suction port and connects the suction port and the suction device when the medium is supported.
According to this configuration, by rotating the rotation unit, the recording medium is sucked through the suction port in the medium supporting state while discharging the liquid received in the liquid receiving port in the liquid receiving state to the liquid recovery unit. It can be supported in a state.

In the liquid ejecting apparatus, the suction device sucks the recording medium on the medium supporting member and the medium supporting portion when the medium supporting member can support the recording medium in a sucked state. It is preferable to do this.
According to this configuration, the suction device can also be used as a means for sucking the recording medium on the medium support member and the medium support portion, and the apparatus can be reduced in size and cost.

The liquid ejecting apparatus preferably includes a plurality of the liquid receivable portions.
According to this configuration, since a plurality of liquid receivable portions are provided, the medium support portion can cope with borderless recording on a plurality of types of recording media. Further, among the plurality of liquid receivable portions, those corresponding to the edge of the recording medium are switched to the liquid receiving state, and other portions are switched to the medium supporting state. Thereby, a plurality of types of sizes of recording media can be stably held, and good print quality can be obtained.

FIG. 3 is a perspective view illustrating a configuration example of a printer. FIG. 3 is a perspective view illustrating an internal configuration example of a main part of the printer. The side view which shows the detail of a conveyance part. The perspective view which shows the structure of a platen. (A), (b) is a figure which shows the principal part structure of an ink receivable part. The figure which shows the periphery structure of the platen which concerns on 2nd embodiment. The figure which shows the principal part cross-section structure of the liquid receivable part which concerns on 2nd embodiment.

(First embodiment)
FIG. 1 is a perspective view illustrating a configuration example of an ink jet printer that is one of liquid ejecting apparatuses according to an embodiment of the present invention, and FIG. 2 illustrates an internal configuration example of a main part of the ink jet printer. It is a perspective view. An ink jet printer 100 (hereinafter referred to as a printer 100) shown in FIGS. 1 and 2 is a large printer capable of recording even on a relatively large size recording sheet such as JIS standard A1 size or JIS standard B1 size. The sheet feeding unit 10, the conveyance unit 20, the sheet discharge unit 30, and the leg unit 40 are arranged in this order from the top.

  That is, the roll paper fed from the paper feeding unit 10 arranged at the uppermost part is conveyed obliquely downward between the conveying unit 20 and the paper discharging unit 30 arranged at an inclination in the lower part, The sheet is discharged to a sheet receiving tray (not shown) disposed between the leg portions 40 disposed at the lowermost portion. The transport unit 20 and the paper discharge unit 30 are integrated as a main body, and are configured to be separable from the paper feed unit 10 and the leg unit 40, respectively.

  As shown in FIG. 1, the paper feed unit 10 is provided so as to protrude to the upper rear of the main bodies 20 and 30. As shown in FIG. 2, a roll paper holder 11 on which one roll paper can be set is provided inside the paper supply unit 10, and the front surface of the paper supply unit 10 is shown in FIGS. 1 and 2. As shown, a flip-up roll paper cover 12 that can be opened and closed is attached to cover the roll paper holder 11.

  As shown in FIG. 2, the roll paper holder 11 is attached to a spindle 13 for holding the roll paper and a pair of flange-shaped roll paper pressers 14 and inner surfaces of both side walls of the paper feeding unit 10. A pair of spindle receivers 15 that can be suspended are provided. The spindle 13 is placed on the spindle receiver 15 and is rotatably supported on the spindle 13 with the roll paper inserted in the center and sandwiched between the roll paper pressers 14. As shown in FIGS. 1 and 2, the roll paper cover 12 is rotatably supported as a whole, and is opened and closed when the user lifts or pushes down the lower part.

  As shown in FIG. 2, the transport unit 20 includes a carriage 22 on which a recording head (liquid ejecting head) 21 is mounted, and a flexible flat cable that electrically connects the recording head 21 and a control unit (not shown) for performing recording. (Hereinafter referred to as FFC) 23, and an ink tube 24 and the like for connecting the recording head 21 and the ink cartridge 5 containing ink. As shown in FIGS. 1 and 2, an upper lid 25 and a front lid 26 are attached to the upper surface and the front surface of the transport unit 20 so as to cover the recording head 21, the carriage 22, and the like.

  The recording head 21 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 light yellow, yellow, light cyan, cyan, light magenta, and magenta. . The recording head 21 is provided with a pressure generating chamber and a nozzle opening connected to the pressure generating chamber. The size of the recording head 21 is controlled from the nozzle opening toward the roll paper by storing ink in the pressure generating chamber and pressurizing it with a predetermined pressure. Ink droplets are discharged.

  As shown in FIG. 2, the carriage 22 is suspended from a rail 27 provided in the main scanning direction via a roller and connected to the carriage belt 28. The carriage belt 28 is operated by a carriage driving device (not shown). Then, it is accompanied by the movement of the carriage belt 28 and is guided by the rail 27 so as to reciprocate.

  The FFC 23 has one end connected to the connector of the control unit and the other end connected to the connector of the recording head 21, and sends a recording signal from the control unit to the recording head 21. The ink tubes 24 are provided for the inks of the respective colors, and one end of each ink tube is connected to the corresponding ink cartridge 5 via an ink pressurizing supply unit (not shown), and the other end of each color recording head. 21 is connected. The ink tube 24 is configured to send the ink of each color pressurized by the ink pressure supply means from the ink cartridge 5 to the recording head 21.

  As shown in FIGS. 1 and 2, the lower part of the front lid 26 is rotatably supported, and the user opens and closes when the user holds the upper part and pushes down or pushes up. Since the user can open the transport unit 20 by opening the front lid 26, maintenance work for the recording head 21, the carriage 22, and the like can be easily performed. Here, details of the transport unit 20 will be described with reference to the drawings.

  FIG. 3 is a side view showing details of the transport unit 20. The transport unit 20 is disposed so as to face the flat sheet feed guide 211 extending from the sheet feed unit 10, the contact / separable paper feed rollers 212 a and 212 b and the driven roller 213, and the recording head 21 mounted on the carriage 22. The platen (medium support member) 214 including the flat and characteristic portion of the present invention, and the paper guide 215 arranged on the downstream side of the conveyance immediately below the platen 214, the platen 214, and the roll paper on the paper guide 215 are sucked. A suction device 50 is provided. The carriage 22 is provided with a cutter 29 for cutting the roll paper that has been recorded.

  The paper feed rollers 212a and 212b are formed as one long roller, and the peripheral surface portion slightly larger than the maximum recordable paper width is coated with ceramic powder or the like. Thereby, since the slip at the time of paper feeding can be prevented, roll paper can be sent out with high precision. Although not shown, both ends of the paper feed rollers 212a and 212b are axially supported on the side frame via bearings, and are driven to rotate forward and backward by a driving force transmitted from the paper feed motor via a pulley and a belt. It is supposed to be.

  The driven roller 213 is formed as a plurality of short rollers, and is rotatably supported by driven roller support members 213a arranged in parallel in the axial direction above the paper feed rollers 212a and 212b. The driven roller 213 is pressed against the paper feed rollers 212a and 212b by a biasing member 213b such as a spring attached to the driven roller support member 213a, and follows the forward and reverse rotation driving of the paper feed rollers 212a and 212b. It is designed to rotate forward and reverse. Accordingly, the roll paper can be firmly pressed from both sides and sent out, so that highly accurate recording can be performed.

  The paper guide 215 is formed in a rectangular flat plate shape having a length slightly larger than the maximum recordable paper width, and is disposed in the immediate vicinity of the transport downstream side of the platen 214. The paper guide surface of the paper guide 215 is disposed so as to be lower than the platen surface 214a, and a cutter step 215b extending substantially in the center in the main scanning direction is formed on the paper guide surface. The cutter step 215b is formed in such a size that the cutting edge of the cutter 29 protruding from the lower surface of the roll paper can enter so as not to damage the paper guide 215 when the cutter 29 cuts the roll paper in the width direction. Yes. As a result, the recorded portion and the unrecorded portion of the roll paper can be reliably separated.

  Further, a plurality of rail-like ribs (not shown) for supporting the roll paper are disposed on the paper guide surface (the surface facing the roll paper) of the paper guide 215, and each rib is a main one. A plurality of suction holes for sucking the roll paper are formed in the center of the paper guide surface between the ribs in a row at predetermined intervals in the scanning direction.

  The cutter 29 is arranged to be movable up and down in the vertical direction and movable in the main scanning direction so that the cutting edge faces downward. The cutter 29 is moved up and down by, for example, a solenoid and moved in the main scanning direction together with the carriage 22. Therefore, it is not necessary to provide a separate means for moving the cutter 29, so that space can be saved and costs can be reduced. The cutter 29 may be separated from the carriage 22 and moved in the main scanning direction by a unique belt mechanism, a motor, or the like.

  As shown in FIGS. 1 and 2, the paper discharge unit 30 includes a paper discharge guide 31 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. The paper discharge guide 31 is formed as a flat inclined surface protruding to the front surface side, and can smoothly guide the roll paper conveyed from above downward.

  As shown in FIGS. 1 and 2, the leg portion 40 includes two support columns 42 each having a moving roller 41, and a reinforcing bar 43 spanned between the support columns 42. Yes. Then, the paper feed unit 10 and the main bodies 20 and 30 are placed on the upper portion of the support column 42 and fixed with screws. Since the moving roller 41 is disposed on the support column 42, the heavy paper feeder 10 and the main bodies 20 and 30 can be smoothly moved to desired positions and installed. . A paper discharge receiving device that receives roll paper discharged from the paper discharge unit 30 can be installed between the support columns 42 of the leg portions 40.

  Further, on the left side when viewed from the front side of the main bodies 20 and 30, as shown in FIGS. 1 and 2, as shown in FIGS. A holder 70 is provided. The lower part of the cover 72 is rotatably supported with respect to the holder main body 71, and the ink cartridge holder 70 is opened and closed when the user holds the upper part and pushes it down or pushes it up. The storage portion provided in the holder main body 71 allows the ink cartridges 5 of a total of seven colors of black, light yellow, yellow, light cyan, cyan, light magenta, and magenta to be individually drawn out and pushed in from the left side in the drawing. It is partitioned.

  Further, as shown in FIGS. 1 and 2, an operation panel 60 for a user to operate recording control and the like is disposed on the upper right side when viewed from the front side of the main bodies 20 and 30. The operation panel 60 is provided with a liquid crystal screen and various buttons so that the user can operate the buttons while checking the liquid crystal screen.

  FIG. 4 is a perspective view showing the configuration of the platen 214. As shown in FIG. 4, the platen 214 is formed in a rectangular flat plate shape having a length slightly larger than the maximum recordable paper width, and is disposed in the immediate vicinity of the conveyance downstream side of the paper feed rollers 212a and 212b. On the platen surface (support surface) 214a of the platen 214, a plurality of rectangular suction grooves 214b for adsorbing the roll paper R are arranged in a row at predetermined intervals in the main scanning direction. The suction groove 214b is formed so that four sides of a flat bottom surface are surrounded by inclined side walls. A plurality of suction holes 214d are formed in the bottom surface of each suction groove 214b and the top surface of a partition wall (medium support portion) 214c provided between the suction grooves 214b. Is connected to a suction device 50 (see FIG. 3) to suck the roll paper R. Accordingly, the partition wall 214c is configured to be supported in a state where the roll paper R is sucked.

  The suction device 50 includes a pressure chamber 50a disposed below the platen 214 and the paper guide 215, and a fan (not shown) disposed below the pressure chamber 50a. The pressure chamber 50a is formed in a box shape in which a part of the upper surface is opened, a platen 214 and a paper guide 215 are attached to the open part of the upper surface, and a fan is attached via a pipe joint 50b attached to the bottom surface. It has been.

  By rotating the fan of the suction device 50, air is sucked into the pressure chamber 50a from a suction hole 214d formed in the platen 214 and a suction hole (not shown) formed in the paper guide, and passes through the fan to the outside. Exhausted. Accordingly, when the roll paper R is supplied to the upper surfaces of the platen 214 and the paper guide 215, negative pressure is generated on the lower surface side of the roll paper R, so that the roll paper R is attracted to the upper surfaces of the platen 214 and the paper guide 215. The roll posture of the roll paper R can be completely prevented and the paper posture can be stabilized.

  The platen 214 according to the present embodiment can perform borderless recording on a plurality of sizes of roll paper R according to JIS standards. As shown in FIG. 4, an ink receivable portion (liquid receptive portion) 250 is provided at a position corresponding to the side edge portion of each size of roll paper R on the platen surface 214 a of the platen 214. In FIG. 4, the illustration is simplified and only one ink receivable portion 250 is shown. However, it is assumed that a plurality of ink receivable portions 250 are received in the paper width direction of the roll paper. The ink receivable portion 250 is for receiving ink droplets that deviate from the edge of the roll paper R during borderless recording of the roll paper and for supporting the back surface of the roll paper R by suction.

  FIG. 5 is a diagram showing a configuration of a main part of the ink receivable portion 250, FIG. 5 (a) is a diagram showing a state of the ink receivable portion 250 in an ink receiving state described later, and FIG. It is a figure which shows the state of the ink receivable part 250 at the time of the support state mentioned later.

  The ink receivable portion 250 includes a rotating member (rotating portion) 251 that is rotatably attached to the platen 214 via a rotating mechanism (not shown), a waste ink collecting portion (liquid collecting portion) 252, and a suction device 50. Is provided with another suction device 51.

  The ink receivable portion 250 can switch between an ink receiving state (see FIG. 5A) for receiving ink droplets and a supporting state (see FIG. 5B) for supporting roll paper. The ink receivable portion 250 is rotatably attached to the platen 214 via a rotation mechanism (not shown) so that the ink receiving state and the supporting state can be switched.

  The rotating member 251 is formed of a disk-shaped member, and supports an ink receiving port (liquid receiving port) 254 that receives ink droplets that are detached from the edge of the roll paper when the roll paper is borderlessly recorded in the ink receiving state. And a support portion 255 for supporting the back surface of the roll paper. The ink receiving port 254 and the support portion 255 are arranged on the platen surface 214a of the platen 214 as the rotating member 251 rotates about the rotating shaft 251a (see FIG. 4). The waste ink collection unit 252 includes a first collection unit 252a used in the ink receiving state and a second collection unit 252b used in the support state.

  Further, a first connection path 256 and a second connection path 257 are formed in the rotating member 251. One end side of the first connection path 256 communicates with the ink receiving port 254. The first connection path 256 is configured such that the other end side is connected to the first recovery part 252a when the ink receiving port 254 is disposed on the platen surface 214a. The first recovery unit 252a is configured to be movable back and forth with respect to the first connection path 256, and does not hinder the rotation operation of the rotating member 251.

  As shown in FIG. 5A, the first connection path 256 has a shape that extends downward at one end and then bends toward the side. The first connection path 256 has an ink receiving surface 256a for receiving the ink received by the ink receiving port 254, and the ink receiving surface 256a is in a state where the first connection path 256 is connected to the first recovery portion 252a. An inclined surface that gradually descends toward the first recovery part 252a in the ink receiving state (that is, in an ink receiving state) is formed. As a result, the ink adhering to the ink receiving surface 256a is well collected by flowing through the ink receiving surface 256a to the first collecting unit 252a.

  In the ink receiving portion 250, in the ink receiving state, the ink receiving port 254 is arranged on the platen surface 214a, so that when the roll paper is borderlessly recorded, ink droplets that have come off the edge of the roll paper are received by the ink receiving port 254. The waste ink is collected by the waste ink collecting unit 252 through the first connection path 256.

  On the other hand, as shown in FIG. 5B, the second connection path 257 is formed so as to penetrate the central portion of the rotating member 251, and one end side communicates with the suction hole 255 a formed in the support portion 255. ing. The second connection path 257 is configured such that the other end side is connected to the suction device 51 when the support portion 255 is disposed on the platen surface 214a. The connection surface of the rotating member 251 with the suction device 51 is a flat surface, and the suction device 51 and the second connection path 257 can be reliably connected.

  When the ink receivable portion 250 is in the support state, the support portion 255 is disposed on the platen surface 214a, so that the support portion 255 reliably supports the back side of the roll paper. Furthermore, as described above, since the support portion 255 applies the suction force of the suction device 51 to the back side of the roll paper through the suction hole 255a, the support portion 255 can stably support the roll paper in a sucked state. .

  Based on such a configuration, each ink receivable portion 250 can easily and reliably switch between the ink receiving state and the medium supporting state by rotating the rotating member 251 with respect to the platen 241.

  When the rotating member 251 is in the support state, the other end side of the first connection path 256 is connected to the second recovery unit 252b. As a result, even when the remaining waste ink adhering to the first connection path 256 (ink receiving surface 256a) falls from the first connection path 256, the second collection unit 252b can reliably collect the waste ink. It has become.

  The suction device 51 includes a pressure chamber 51a disposed below the rotating member 251 and a fan (not shown) disposed below the pressure chamber 51a. The pressure chamber 51a is formed in a box shape in which a part of the upper surface is opened, the second connection path 257 can be connected to the open portion of the upper surface, and the fan can be connected via the pipe joint 51b attached to the bottom surface. It is attached.

  Further, when the suction device 51 is connected to the second connection path 257, the back side of the roll paper can be sucked through the second connection path 257 and the suction hole 255a. Specifically, the suction device 51 is sucked into the pressure chamber 253a from the suction hole 255a formed in the support portion 255 by rotating the fan, and is exhausted to the outside through the fan. Therefore, when roll paper is supplied to the upper surface of the support portion 255, negative pressure is generated on the lower surface side of the roll paper, so that the roll paper is attracted to the upper surface of the support portion 255 to completely prevent the roll paper from floating. The paper posture can be stabilized.

  Next, the operation of the printer 100 according to the present embodiment will be described. In this description, the operation of the ink receivable unit 250, which is a characteristic configuration of the printer 100, will be mainly described.

  When performing borderless recording on the roll paper fed from the paper supply unit 10, the printer 100 switches the two ink receivable units 250 corresponding to the paper edges on both sides of the roll paper to the ink receiving state. Specifically, the ink receivable portion 250 rotates the rotating member 251 by a rotation mechanism (not shown), and the ink receiving port 254 is disposed on the platen surface 214 a of the platen 214.

  In addition, the printer 100 switches the ink receivable portion 250 corresponding to the back surface of the roll paper, that is, in the region covered with the roll paper, to the support state. Specifically, the ink receivable portion 250 rotates the rotating member 251 by a rotation mechanism (not shown), and the support portion 255 is disposed on the platen surface 214 a of the platen 214.

  For example, when the size of the roll paper for borderless recording is small, there is an ink receivable portion 250 arranged in a region that does not correspond to the back surface or paper edge of the roll paper, that is, does not overlap with the roll paper in a plane. It is possible. In this case, in the present embodiment, such an ink receivable portion 250 that does not overlap with the roll paper in a planar manner is switched to an ink receivable state.

  In the ink receivable portion 250 switched to the ink receivable state, the second connection path 257 is not connected to the suction device 51 as will be described later, and therefore the platen surface 214a side is not sucked through the suction hole 255a. Therefore, the suction force by the suction device 51 can be efficiently applied only to the supported ink receivable portion 250, and a stable negative pressure can be generated on the lower surface side of the roll paper.

  The printer 100 starts borderless recording on the roll paper after switching each ink receivable portion 250 to either the ink receiving state or the support state according to the size of the roll paper. At this time, on the platen surface 214a, the fan of the suction device 51 rotates to generate a negative pressure on the lower surface side of the roll paper, and the roll paper is attracted to the upper surface of the platen 214 to completely prevent the roll paper from being lifted. Thus, ink droplets can be ejected onto the roll paper while the paper posture is stabilized.

  Further, when borderless recording on the roll paper starts, a part of the ink droplets ejected from the nozzle openings of the recording head 21 at the edge of the roll paper may come off the edge and be ejected toward the platen surface 214a. is there. On the other hand, since the ink receivable portion 250 corresponding to the edge of the roll paper is switched to the ink receiving state, as shown in FIG. It can be satisfactorily collected in the first collection part 252a through the ink receiving surface 256a of the mouth and the first connection path 256. Therefore, borderless recording can be satisfactorily performed on the roll paper without staining the platen surface 214a.

  On the other hand, in the ink receivable portion 250 switched to the support state, the suction hole 255a is connected to the suction device 51 via the second connection path 257 as shown in FIG. The suction device 51 rotates the fan to generate a negative pressure on the lower surface side of the roll paper supplied to the upper surface of the support portion 255, and the roll paper is lifted by adsorbing the roll paper to the upper surface of the support portion 255. The paper posture can be stabilized completely.

  As described above, according to the present embodiment, the ink receivable portion 250 can switch between the liquid receiving state and the medium supporting state when performing borderless recording of roll paper. Therefore, when the ink receivable portion 250 corresponds to the edge of the roll paper, the ink that has been removed from the edge can be reliably received via the ink receiving port 254 and the first connection path 256. Further, when the ink receivable portion 250 corresponds to the back surface of the roll paper, it can be stably supported by sucking the lower surface of the roll paper through the suction holes 255a formed in the support portion 255.

  The platen 214 provided with such an ink receivable portion 250 can reliably receive the ink that has come off from the edge of the roll paper of different sizes and can stably support the back side of the roll paper. Therefore, even if it is a configuration capable of borderless recording, it is possible to suppress the occurrence of cockling on the roll paper and improve the ink landing accuracy on the roll paper. Therefore, the printer 100 is highly reliable and can obtain good print quality.

(Second embodiment)
Next, a configuration according to the second embodiment of the printer will be described. The difference between the present embodiment and the first embodiment is that it also serves as a suction device that sucks the platen and the roll paper on the support portion, and the other configurations are the same. Therefore, in the following description, the same reference numerals are given to the same members or configurations as those in the above embodiment, and the description is simplified.

  FIG. 6 is a diagram showing a peripheral configuration of the platen 214 according to the present embodiment, and FIG. 7 is a diagram showing a cross-sectional configuration of a main part of an ink receivable portion 350 provided on the platen 214. FIG. 7A is a diagram illustrating a state of the ink receivable portion 350 in the ink receiving state, and FIG. 7B is a diagram illustrating a state of the ink receivable portion 350 in the supporting state.

  As shown in FIG. 6, the suction hole 214 d formed in the platen surface 214 a of the platen 214 is connected to the suction device 60 provided in the lower part of the platen 214. The suction device 60 includes a pressure chamber 60a communicating with the suction hole 214d, and a fan (not shown) disposed at the lower portion of the pressure chamber 60a. The pressure chamber 60a communicates with a suction hole 214d formed in the platen surface 214a, and a fan is attached via a pipe joint 60b attached to the bottom surface. By rotating the fan and exhausting it to the outside, A negative pressure is generated on the lower surface side of the roll paper.

  As shown in FIGS. 7A and 7B, the ink receivable portion 350 according to this embodiment is attached to the platen 214 via a rotation mechanism (not shown) so as to be rotatable about a rotation shaft 351a. A member 351 and a waste ink recovery unit (liquid recovery unit) 352 are provided. A first connection path 356 and a second connection path 357 are formed in the rotating member 351.

  The first connection portion 356 has a shape having a branch end branched into three, and one of the branch ends is connected to the ink receiving port 354. Further, when the ink receiving port 354 is disposed on the platen surface 214a, the remaining one branch end 356a is connected to the waste ink collecting portion 352, and when the support portion 355 is disposed on the platen surface 214a, the remaining other branch end 356a is connected. The branch end 356 b is connected to the waste ink collection unit 352. The inner surface of the first connection path 356 constitutes an ink receiving surface 356 c that receives the ink received by the ink receiving port 354.

  The first connecting portion 356 has a branch end 356b connected to the waste ink collecting portion 352 at the time of ink reception when the support portion 355 is disposed on the platen surface 214a. It is located above. Therefore, the waste ink attached in the vicinity of the branch end 356a is collected by the waste ink collection unit 352 through the branch end 356b along the inner surface of the first connection portion 356. The waste ink collection unit 352 is configured to be able to advance and retreat with respect to the rotating member 351 so as not to hinder the rotating operation of the rotating member 351.

  In the ink receiving portion 350, in the ink receiving state, the ink receiving port 354 is arranged on the platen surface 214a, so that the ink receiving port 354 removes ink droplets that are detached from the edge of the roll paper when the roll paper is recorded without a border. The waste ink is collected in the waste ink collecting unit 352 through the first connection path 356.

  On the other hand, as shown in FIG. 7B, the second connection path 357 is formed to the vicinity of the central portion of the rotating member 251, and one end side communicates with the suction hole 355a formed in the support portion 355. The other end side communicates with the widened portion 357a. The widened portion 357a is formed so as to penetrate the rotating member 351 in the thickness direction. When the support portion 355 is disposed on the platen surface 214a, the widened portion 357a is disposed in the pressure chamber 60a of the suction device 60 disposed on the lower surface side of the platen 214. It is designed to communicate. As a result, the suction force of the suction device 60 is applied to the back side of the roll paper on the support portion 355 through the suction hole 355a formed in the support portion 355.

  When the ink receivable portion 350 is in the support state, the support portion 355 is disposed on the platen surface 214a so that the support portion 355 reliably supports the back side of the roll paper.

  Further, when the suction device 60 is connected to the second connection path 357 through the widened portion 357a, the back side of the roll paper can be sucked through the second connection path 357 and the suction hole 255a. Specifically, the suction device 60 sucks air into the pressure chamber 353a from the suction hole 355a formed in the support portion 355 by rotating the fan, and is exhausted to the outside through the fan. Accordingly, when roll paper is supplied to the upper surface of the support portion 355, negative pressure is generated on the lower surface side of the roll paper, so that the roll paper is attracted to the upper surface of the support portion 355 and the roll paper is completely prevented from being lifted. The paper posture can be stabilized.

  As described above, the configuration according to the present embodiment also includes the ink receivable portion 350. Therefore, even in the configuration capable of borderless recording, the occurrence of cockling on the roll paper is suppressed, and the ink for the roll paper is suppressed. The landing accuracy can be improved.

  In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of invention, it can change suitably. For example, in the above embodiment, the configuration in which the support portion 255 of the ink receivable portion 250 sucks the back side of the roll paper has been described, but the support portion 255 has a configuration that supports only the back side of the roll paper without sucking. It doesn't matter. Even with this configuration, the above-described cockling can be prevented from occurring.

  Further, the liquid ejecting apparatus of the present invention is a liquid ejecting apparatus that ejects a liquid corresponding to the application instead of ink from a liquid ejecting head to an ejected medium and attaches the liquid to the ejected medium. Color material ejection heads used for manufacturing color filters such as displays, electrode material (conductive paste) ejection heads used for electrode formation such as organic EL displays and surface-emitting displays (FEDs), bioorganic matter ejection heads used for biochip production, The present invention can also be applied to an apparatus including a sample ejection head as a precision pipette.

R ... roll paper (recording medium), 21 ... recording head (liquid ejecting head), 51, 60 ... suction device 100 ... printer (liquid ejecting apparatus), 214 ... platen (medium support member), 214a ... platen surface (support surface) , 214b... Partition wall (medium support part), 250, 350... Ink receiving part (liquid receiving part), 251... Rotating member (rotating part), 252 .. waste ink collecting part (liquid collecting part), 254 ... ink receiving port (liquid receiving port), 256, 356 ... first connection path, 257, 357 ... second connection path

Claims (7)

A medium support member for supporting the recording medium;
A liquid ejecting head that ejects liquid onto the recording medium supported by the medium supporting member;
Provided on the support surface side of the recording medium in the medium support member, and is capable of switching between a liquid receiving state for receiving the liquid removed from the edge of the recording medium and a medium supporting state for supporting the back surface of the recording medium. A liquid ejecting apparatus comprising: a liquid receivable portion. The medium support member can support the recording medium in a sucked state;
The liquid ejecting apparatus according to claim 1, wherein the liquid receivable portion can be supported in a state where the recording medium is sucked in the medium supporting state. The liquid receivable portion has a rotation portion that is rotatably provided on the medium support member,
The liquid ejecting apparatus according to claim 1, wherein the liquid receiving state and the medium support state can be switched by a turning operation of the turning unit.   The rotation unit includes a liquid receiving port that receives the liquid that is separated from an edge of the recording medium in the liquid receiving state, and a medium support unit that can support the recording medium in the medium supporting state. Item 4. The liquid ejecting apparatus according to Item 3. The liquid receivable part includes: a liquid recovery part capable of recovering the liquid received by the liquid reception opening; and a suction device capable of sucking the recording medium via a suction opening provided in the medium support part. Including
A first connection path that communicates with the liquid receiving port and connects the liquid receiving port and the liquid recovery unit when in the liquid receiving state, and is connected to the suction port and the medium. The liquid ejecting apparatus according to claim 4, wherein a second connection path that connects the suction port and the suction device in a supported state is formed. In the case where the medium support member can support the recording medium in a sucked state,
The liquid ejecting apparatus according to claim 5, wherein the suction device sucks the recording medium on the medium support member and the medium support unit.   The liquid ejecting apparatus according to claim 1, comprising a plurality of the liquid receivable portions.

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