JP5136753B2 - Recording material support device, recording device - Google Patents

Description

  In the present invention, a plurality of ridges formed along the conveyance direction of the recording material are arranged side by side in a direction intersecting the conveyance direction, and the recording material that supports the recording material at the top of the ridge. The present invention relates to a recording material support device and a recording device including the recording material support device.

  In a recording apparatus such as an ink jet printer, a plurality of ridges (platen ribs, etc.) formed along the conveyance direction of a recording material are arranged side by side in a direction crossing the conveyance direction. A recording apparatus including a recording material support device such as a so-called platen that supports the recording material at the top is known (see, for example, Patent Document 1). In the recording apparatus, the following two objects can be given as the main object of adopting the recording material supporting apparatus having such a configuration.

  The first object is that the recording surface of the recording material is caused by the wavy deformation of the recording material called so-called cockling, which occurs when ink or the like is ejected onto the recording surface of the recording material such as recording paper. This is to reduce the possibility of floating and coming into contact with ink ejecting means such as a recording head. In other words, by appropriately arranging the protrusions in accordance with the uneven shape of the wavy deformation of the recording material due to cockling, the back side of the convex part of the wavy deformation can be supported by the protrusions, and the wavy deformation Part can escape between the ridges. Accordingly, the recording material can be prevented from being lifted due to the undulation deformation, so that the possibility that the recording surface of the recording material contacts the ink ejecting means such as a recording head can be reduced.

  The second purpose is to perform so-called marginless recording that performs recording on the recording material without any margin. Ink that has been discarded outside the recording material adheres to the back surface of the recording material. This is to prevent the recording material from being stained. In order to eject ink onto the recording material without margin, in consideration of skew, conveyance error, dimensional error, etc. of the recording material, an ink ejection area sufficiently larger than the recording material is set, and the outside of the recording material is set. However, it is necessary to execute recording while ejecting ink. At this time, the ink ejected to the outside of the recording apparatus is discarded between the ridge portion supporting the recording material and the ridge portion outside the recording material. As a result, it is possible to prevent the ink from being ejected to the portion where the recording material is slidably supported from the back surface side, so that the ink discarded on the outside of the recording material adheres to the back surface of the recording material. (For example, refer to Patent Document 1).

The following is known as an example of the prior art relating to such a recording material support device (platen or the like).
For example, in a recording apparatus capable of recording on both sides of a recording material, a recording apparatus provided with moving means for moving the entire platen having a plurality of protrusions in a direction intersecting the recording material conveyance direction is known. is there. The unevenness of the wavy deformation of the recording material caused by cockling during front surface recording is reversed during backside recording. May arise. In the conventional technique, when the back side recording is performed, the entire platen is moved in a direction crossing the recording material conveyance direction by a distance that is half the distance between the protrusions. As a result, the back side of the convex portion of the undulating deformation is in contact with the top of the ridge portion even when the back surface recording is performed, so that the recording material can be prevented from being lifted during the back surface recording. (For example, see Patent Document 2).

  Similarly, as a conventional technique for moving the entire platen in a direction intersecting with the conveyance direction of the recording material, a recording head having a large number of nozzles for ejecting ink onto the recording material is half the nozzle interval. A recording apparatus having a fine movement mechanism that slightly moves the entire platen by an interval is known. By providing such a fine movement mechanism, it is possible to realize image recording with a resolution higher than the resolution corresponding to the original nozzle interval (see, for example, Patent Document 3).

Further, as another conventional technique related to a recording material support apparatus (platen or the like), a recording apparatus having means for moving all the ridges up and down simultaneously is known. In the recording apparatus, after the ink is ejected onto the recording material, the platen rib retracts in a direction away from the back surface of the recording material only while the recording material is conveyed in the conveyance direction. Platen ribs do not touch. Accordingly, frictional noise generated on the sliding contact surface between the recording material and the platen rib can be reduced, and wear of the platen rib can be prevented (see, for example, Patent Document 4).
JP 2004-322635 A JP 2006-192838 A JP 2007-130777 A JP 2007-144723 A

  In order to effectively prevent the recording material from lifting due to the wavy deformation of the recording material due to cockling (first object), the recording material having a size that can be used in the recording device in the recording material support device. It is necessary to appropriately set the arrangement and interval of each protrusion so as to be able to handle all of the above. In other words, the arrangement and interval of the protrusions are inevitably determined depending on the type of recording material having a size usable in the recording apparatus, and the degree of freedom is low. In recent years, there are recording materials of various sizes as recording materials that can be used in the recording apparatus. For this reason, the degree of freedom of the arrangement and interval of the protrusions in the recording material support device tends to be lower.

  In addition, as described above, in order to eject ink onto the recording material without margin, it is necessary to set a larger ink ejection area than the recording material and execute recording while ejecting ink to the outside of the recording material. There is. At this time, if a protrusion corresponding to the recording material having a size larger than that size is arranged in the ink ejection area of a recording material of a certain size, the ink is ejected to the top of the protrusion. It will be done. That is, the purpose (second purpose) of preventing the so-called back contamination of the recording material cannot be achieved.

  In particular, in a recording material having a relatively small size (L size, postcard size, KG size, etc.) used for digital photographic prints, the dimensional difference between recording materials of different sizes is relatively small. For this reason, interference is likely to occur between the ink ejection area when performing borderless recording on a recording material of a certain size and the protrusion corresponding to the recording material of a size slightly larger than that size. In addition, if the protrusions are arranged so as not to interfere with the ink ejection area when performing borderless recording on a recording material of a certain size, this time, the recording material having a size slightly larger than that size is added to the protrusions. There is a possibility that it cannot be properly supported by the part. As a result, a part of the recording material hangs down between the ridges, and the back surface of the recording material comes into contact with the ink discarded between the ridges, causing back stain.

  For this reason, there has been a problem that recording media that can use recording materials of a wide variety of sizes in recent years tend to easily cause stains on the recording material. Such a problem cannot be solved by any of the above-described conventional techniques.

  The present invention has been made in view of such a situation, and the problem is that it is possible to increase the degree of freedom of the arrangement and spacing of the protruding portions of the recording material support device and to perform borderless recording. In the recording apparatus, there is a reduction in the possibility that the recording material will be stained.

  In order to achieve the above object, according to a first aspect of the present invention, a plurality of protrusions formed along a recording material conveyance direction are arranged side by side in a direction intersecting the conveyance direction, A recording material support device for supporting the recording material at the top of the ridge, wherein at least one of the plurality of ridges is displaceable in a direction intersecting the transport direction. It is a recording material support device characterized by being a movable ridge portion disposed.

  In this way, by providing the movable ridge portion disposed so as to be displaceable in a direction intersecting the conveyance direction of the recording material, according to the size of the recording material supported by the recording material support device, The arrangement and interval of the ridges in the direction intersecting the recording material conveyance direction can be changed. Therefore, in the recording apparatus provided with this recording material support apparatus, the ideal arrangement and spacing of the protrusions in the direction intersecting the recording material conveyance direction can be realized for each different recording material size. Is possible. That is, by providing a movable ridge that is arranged to be displaceable in a direction intersecting the recording material conveyance direction, the degree of freedom of the arrangement and interval of each ridge of the recording material support device is increased. Can do.

  In addition, for example, when an ink ejection area when performing borderless recording on a recording material of a certain size and a protrusion corresponding to a recording material of a size larger than that size interfere with each other. The protrusion may be a movable protrusion. As a result, when performing borderless recording on a recording material of a certain size, if the ridge is displaced outward from its original position, interference between the ink ejection area and the ridge is facilitated. It can be avoided reliably. Therefore, it is possible to reliably prevent the ink from being ejected onto the top of the ridge, so that it is possible to prevent the recording material from being stained by the ink ejected onto the top of the ridge. Can be prevented.

  When recording is performed on a recording material having a size that is slightly larger than the size, if the ridges are displaced to their original positions, recording is performed with the original ideal ridge arrangement and spacing. Recording can be performed while supporting the material. Therefore, it is possible to reliably prevent a part of the recording material from dripping between the protrusions and causing the back surface of the recording material to come into contact with the ink discarded between the protrusions to cause back stain. it can.

  Thereby, according to the recording material support device described in the first aspect of the present invention, there is obtained an operational effect that the degree of freedom of the arrangement and interval of the protrusions of the recording material support device can be increased. . Further, according to the recording material supporting apparatus described in the first aspect of the present invention, it is possible to reduce the possibility that the recording material will be stained in the recording apparatus capable of performing borderless recording. The effect is obtained.

  According to a second aspect of the present invention, in the recording material support device according to the first aspect described above, an ink absorbing material is disposed around the protrusion and the movable protrusion, and the movable member is movable. The protrusion is supported so that the top of the movable protrusion is displaced in a direction intersecting the transport direction while deforming the ink absorbing material at the side of the movable protrusion. This is a recording material support device.

  When performing borderless recording, recording is performed while ink is discarded between the protrusions. Therefore, by disposing the ink absorbing material around the protrusions and the movable protrusions, it is possible to prevent the discarded ink from being accumulated between the protrusions. Accordingly, it is possible to reduce the possibility that the ink that has been discarded between the protrusions when performing borderless recording adheres to the back side of the recording material and causes back stain.

  Since the movable ridge portion is displaced while deforming the ink absorbing material at the side portion of the movable ridge portion, there is almost no gap between the side portion of the movable ridge portion and the ink absorbing material. can do. Accordingly, it is possible to reduce a possibility that a part of the ink discarded between the protrusions leaks into the recording apparatus from the gap between the ink absorbing material and the movable protrusion.

According to a third aspect of the present invention, there is provided a recording material support apparatus according to the first aspect or the second aspect described above, and ink on a recording surface of the recording material supported by the recording material support apparatus. The recording apparatus includes: an ink ejecting unit that ejects; and a conveying unit that conveys the recording material supported by the recording material supporting device in the conveying direction.
According to the recording apparatus of the third aspect of the present invention, the ink ejecting means for ejecting ink onto the recording surface of the recording material supported by the recording material supporting device, and the recording material supporting device support the recording material. In the recording apparatus provided with the conveying means for conveying the recording material being conveyed in the conveying direction, it is possible to obtain the effects of the invention described in the first aspect or the second aspect.

According to a fourth aspect of the present invention, there is provided the recording apparatus according to the third aspect, further comprising a displacement means for displacing the movable protrusion.
By providing a displacement means for displacing the movable ridge, the user can displace the movable ridge without directly operating the movable ridge by hand.

  According to a fifth aspect of the present invention, in the recording apparatus according to the fourth aspect described above, the displacement means displaces the movable protrusion by rotating an elastic shaft. The recording device.

  In this way, by engaging the movable protrusion and the displacement means via the elastic shaft body, the assembly error of the displacement means with respect to the recording apparatus, rattling or the like is absorbed by the elastic deformation of the shaft body. Is possible. As a result, it is possible to prevent the position accuracy of the movable ridge portion from being lowered due to an assembly error of the displacement means with respect to the recording apparatus, rattling or the like. Also, even if the movement of the displacement means exceeds the movable width of the movable ridge, it can be absorbed to some extent by the elastic deformation of the shaft body, so that the parts of the displacement means or the movable ridge are damaged or dropped off. It is possible to reduce the risk of being lost.

  According to a sixth aspect of the present invention, in the recording apparatus according to the fourth aspect or the fifth aspect described above, the recording apparatus includes a feeding device that feeds a recording material to the transport unit. It has a restricting means for restricting both end positions in the direction intersecting the transport direction of the recording material to be fed placed on the placement surface, and should be fed placed on the placement surface. The recording apparatus is characterized in that, depending on the size of the recording material, the restricting means engages with the displacing means and the movable ridge portion is displaced.

  As described above, the movable ridge portion is displaced when the regulating means engages with the displacing means according to the size of the recording material to be fed placed on the placement surface. That is, the recording apparatus according to the sixth aspect of the present invention is controlled by the user operating the restricting means according to the size of the recording material to be fed placed on the placing surface. The displacement means operates in conjunction with the operation of the means, and the ideal arrangement and interval of the protrusions of the recording material are automatically set. Therefore, it is possible to prevent the user from forgetting the manual operation for displacing the movable ridge portion or performing the wrong operation in advance, so that the backside of the recording material can be prevented in borderless recording. It is possible to reliably reduce the risk of occurrence.

  According to a seventh aspect of the present invention, in the recording apparatus according to any one of the third to sixth aspects described above, the movable protrusion is supported by the recording material support device and transported in the transport direction. A first displacement position for retreating to the outside of the ink ejection area when ink is ejected onto the recording material of the first size without margin, and the recording material of the first size. And a second displacement position capable of supporting a recording material having a second size larger than the recording material.

  By causing the displacement position of the movable ridge portion to be the first displacement position, the movable ridge portion is retracted to the outside of the ink ejection area when performing borderless recording on the recording material of the first size. Can do. Thus, when performing borderless recording on the recording material of the first size, it is possible to reliably prevent ink from being ejected onto the top of the movable protrusion. Therefore, after performing borderless recording on the first size recording material, and when recording on the second size recording material, the second size recording material is contaminated. Can be prevented from occurring.

  Further, by setting the displacement position of the movable ridge portion as the second displacement position, the movable ridge portion can be arranged at a position where the recording material of the second size can be supported. That is, it becomes possible to dispose the movable protrusion at an ideal position for supporting the recording material of the second size. Accordingly, it is possible to reliably prevent a part of the second size recording material from hanging between the protrusions during recording on the recording material of the second size. . That is, it is possible to reliably prevent the ink that has been discarded between the protrusions from being contacted and adhered to the back surface of the recording material when performing borderless recording. Therefore, when recording is performed on the recording material having the second size, it is possible to prevent the back-side stain from being generated on the recording material having the second size.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Schematic configuration of inkjet printer>
First, a schematic configuration of an inkjet printer 50 as a “recording apparatus” according to the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is a perspective view of an essential part of the ink jet printer 50. FIG. 2 is a side sectional view of the inkjet printer 50.

  The ink jet printer 50 includes a transport driving roller 51 and a transport as “transport means” for transporting the recording paper P as the “recording material” supported in the platen 53 as the “recording material support device” in the transport direction Y. A driven roller 52, a discharge drive roller 54, and a discharge driven roller 55 are provided. Further, the ink jet printer 50 includes a recording head 63 as “ink ejecting means” that ejects ink onto the recording surface of the recording paper P supported by the platen 53. Further, the ink jet printer 50 includes an automatic feeding device 70 as a “feeding unit” for feeding the recording paper P to the “conveying unit”.

  The automatic feeding device 70 includes a hopper 71, a left edge guide 72, a right edge guide 73, a feeding roller 74, and a separation pad 75. The recording sheet P to be fed is placed on the placement surface 711 of the hopper 71. The hopper 71 swings toward the feed roller 74 by a swing mechanism (not shown) that operates in conjunction with the rotation of the feed roller 74. Accordingly, the recording paper P placed on the placement surface 711 can be urged and engaged with the outer peripheral surface of the feeding roller 74.

  Further, on the hopper 71, a left edge guide 72 and a right edge guide 73 serving as a pair of symmetrical “regulating means” are slidable in the width direction X of the recording paper P (direction intersecting the transport direction Y). It is arranged. The automatic feeding device 70 includes an interlocking mechanism (not shown) that moves the other one of the left edge guide 72 and the right edge guide 73 in the opposite direction with the same movement amount. . In other words, the automatic paper feeder 70 operates the left edge guide 72 or the right edge guide 73 to operate the recording to place the interval between the left edge guide 72 and the right edge guide 73 on the placement surface 711. The center position of the recording paper P in the width direction X is always a predetermined position regardless of the size of the recording paper P that can be adjusted according to the size of the paper P and placed on the placement surface 711. As described above, both end positions in the width direction X of the recording paper P placed on the placement surface 711 can be restricted.

  The feeding roller 74 is disposed integrally with the feeding roller shaft 741, and rotates when the feeding roller shaft 741 is rotated by the rotational force of the feeding motor 76. The separation pad 75 is a known separation means. The plurality of recording papers P sandwiched between the outer peripheral surface of the feeding roller 74 and the separation pad 75 are in contact with the outer peripheral surface of the feeding roller 74 due to the frictional resistance of the separation surface of the separation pad 75. Are separated from other recording paper P. The uppermost recording sheet P is fed toward the contact surface between the transport driving roller 51 and the transport driven roller 52 by the rotation of the feed roller 74.

  The transport driving roller 51 has a high friction coating on the surface thereof, and rotates in the transport direction Y when a driving force of a transport motor (not shown) is transmitted. The conveyance driven roller 52 is pivotally supported by a driven roller holder 521 and is urged against the outer peripheral surface of the conveyance driving roller 52 by an urging means (not shown). The recording paper P fed by the automatic feeding device 70 is sandwiched between the transport driving roller 51 and the transport driven roller 52, and moves on the platen 53 by a predetermined transport amount in the transport direction Y by the driving rotation of the transport driving roller 51. Be transported.

  The recording head 63 is disposed at the bottom of the carriage 62. A large number of ejection nozzles for ejecting ink are disposed on the head surface of the recording head 63. The carriage 62 is capable of reciprocating in the width direction X of the recording paper P while maintaining a state in which the head surface of the recording head 63 and the recording surface of the recording paper P on the platen 53 are substantially parallel to the carriage guide shaft 61. It is supported.

  The platen 53 has a large number of platen ribs 531 as “ridges”, and a left movable rib 533 and a right movable rib 534 as “movable ridges”. The platen rib 531, the left movable rib 533, and the right movable rib 534 are formed along the conveyance direction Y of the recording paper P. The plurality of platen ribs 531 are arranged side by side in the width direction X as illustrated, and a left movable rib 533 and a right movable rib 534 are provided as a part thereof.

  The recording paper P conveyed on the platen 53 is supported from the back side by the tops of the platen rib 531, the left movable rib 533, and the right movable rib 534. The distance between the head surface of the recording head 63 and the recording surface of the recording paper P is defined by the top portions of the platen rib 531, the left movable rib 533, and the right movable rib 534. Details of the left movable rib 533 and the right movable rib 534 will be described later.

  An ink absorbing material 532 is disposed around the platen rib 531, the left movable rib 533, and the right movable rib 534. The ink absorbing material 532 absorbs and retains ink that has been discarded from the recording head 63 to the outside of the recording paper P when recording is performed on the four sides of the recording paper P without any margin. As described above, by disposing the ink absorbing material 532 between the ribs, it is possible to prevent ink discarded between the ribs during the borderless recording from being accumulated between the ribs. Accordingly, it is possible to reduce the possibility that the ink discarded between the ribs at the time of executing the borderless recording adheres to the back side of the recording paper P and the back stain is generated.

  The recording paper P transported on the platen 53 ejects ink from the head surface of the recording head 63 to the recording surface of the recording paper P while the carriage 62 reciprocates in a direction substantially perpendicular to the transport direction Y, and transport. Recording on the recording surface is executed by alternately repeating the operation of transporting the recording paper P by a predetermined transport amount in the transport direction Y by the driving rotation of the driving roller 51. The recording paper P after ink ejection is sandwiched between the discharge driving roller 54 and the discharge driven roller 55, conveyed in the conveyance direction Y by the driving rotation of the discharge driving roller 54, and discharged.

<First embodiment of the present invention>
Next, a first embodiment of the ink jet printer 50 according to the present invention will be described in detail with reference to FIGS.

3 and 4 are perspective views illustrating the main part of the inkjet printer 50. FIG. 5 and 6 are plan views illustrating the main part of the inkjet printer 50. FIG. 7 and 8 are enlarged perspective views of a part of the platen 53. FIG.
3, 5, and 7 illustrate states when recording is performed on the L-size recording paper P, and FIGS. 4, 6, and 8 illustrate postcard size or KG size. The state when recording on the recording paper P is illustrated.

  The right movable rib 534 is disposed on the platen 53 so as to be displaceable in the width direction X. The ink jet printer 50 includes a rotating lever 21 and a shaft body 22 as “displacement means” for displacing the right movable rib 534. The rotation lever 21 is pivotally supported around a rotation shaft portion 211 provided on one end side so as to be rotatable. The rotating shaft portion 211 has irregularities formed on the outer peripheral surface at substantially equal intervals. The shaft body 22 is pivotally supported so as to be rotatable about the shaft center. A gear 221 that meshes with the rotation shaft portion 211 of the rotation lever 21 is provided on one end side of the shaft body 22, and a right movable rib 534 is integrally disposed on the other end side of the shaft body 22. ing.

  Here, it is preferable that the shaft body 22 is configured to be elastically deformable to some extent. In other words, by engaging the right movable rib 534 and the rotation lever 21 via the elastic shaft body 22, an assembly error or backlash of the rotation lever 21 or the shaft body 22 with respect to the inkjet printer 50 can be reduced. It can be absorbed by elastic deformation of the shaft body 22. Accordingly, it is possible to prevent the position accuracy of the right movable rib 534 from being lowered due to an assembly error or rattling of the rotation lever 21 or the shaft body 22 with respect to the inkjet printer 50. Further, even if the pivoting operation of the pivoting lever 21 exceeding the movable width of the right movable rib 534 can be absorbed to some extent by the elastic deformation of the shaft body 22, the pivoting lever 21, the shaft body 22 or the right The possibility that the movable rib 534 is damaged or dropped off can be reduced.

  The right movable rib 534 is biased by a biasing means (not shown) in a direction away from the protrusion 531 adjacent to the left side (rightward direction). The right edge guide 73 restricts the right end position in the width direction X of the recording paper P placed on the placement surface 71. In this state, when the recording paper P is an L-size recording paper P as the “first size recording material”, the lower end portion 731 of the right edge guide 73 is moved from the rotating lever 21. It will be in the state separated (FIG. 3, FIG. 5). Therefore, when recording is performed on the L-size recording paper P, the right movable rib 534 is displaced in a direction away from the protrusion portion 531 on the left side in the drawing (toward the right) as illustrated. (FIGS. 3, 5, and 7).

  On the other hand, when the recording paper P placed on the placement surface 71 is a postcard size or KG size recording paper P as a “second size recording material” larger than the L size, the recording is performed. Depending on the size of the paper P, the lower end portion 731 of the right edge guide 73 is engaged with the turning lever 21 and the right movable rib 534 is displaced. That is, when the right edge guide 73 is moved in the direction indicated by the symbol A so as to correspond to the right end position of the postcard size or KG size recording paper P, the lower end portion 731 of the right edge guide 73 moves the tip of the rotating lever 21. By pushing, the turning lever 21 turns in the direction indicated by the symbol B. As a result, the shaft body 22 rotates in the direction indicated by symbol C (FIGS. 4 and 6), and the right movable rib 534 approaches the ridge portion 531 on the left side as shown in the drawing (reference symbol D). (Direction shown by) (FIGS. 6 and 8).

  The left movable rib 533 is arranged to be bilaterally symmetric with the same structure as the right movable rib 534, and the “displacement means” similar to the right movable rib 534 is bilaterally symmetric with the same structure. The detailed description will be omitted. When the left edge guide 72 is moved in correspondence with the left end position of the recording paper P of postcard size or KG size, the left movable rib 533 moves in the direction in which the left movable rib 533 approaches the ridge 531 adjacent to the right side. (Fig. 1).

  As described above, when the user operates the left edge guide 72 or the right edge guide 73 according to the size of the recording paper P to be fed placed on the placement surface 711, the operation is interlocked with the operation. The left movable rib 533 and the right movable rib 534 are displaced, and the ideal arrangement and interval of the platen ribs 531 of the recording paper P are automatically set. Therefore, it is possible to prevent the user from forgetting or performing a manual operation for displacing the left movable rib 533 and the right movable rib 534 in advance.

Here, the function and action of the left movable rib 533 and the right movable rib 534 as the “movable protrusion” will be described in more detail with reference to FIGS. 9 and 10 by taking the right movable rib 534 as an example. To do.
9 and 10 are plan views schematically showing a portion of the platen 53 where the right movable rib 534 is disposed. FIG. 9 illustrates the execution time of recording on the L-size recording paper P, and FIG. 10 illustrates the execution time of recording on the postcard-size or KG-size recording paper P.

  The right movable rib 534 is a rib that is not necessary when recording is performed on a recording sheet P having an L size (width: 89 mm × length: 127 mm). However, the right movable rib 534 is a rib that is necessary when recording on the recording paper P having a postcard size (width 100 mm × length 148 mm) or KG size (width 102 mm × length 152 mm). In other words, the right movable rib 534 is originally fixed at the position shown by the one-dot chain line in FIG. 9 from the viewpoint of preventing the recording paper P from being lifted by cockling and preventing the back dirt from being partially dropped. It is a rib to be provided.

  However, the difference between the width of the L size and the width of the postcard size is only about 11 mm. In particular, as in the case of the ink jet printer 50 in the embodiment, when the configuration is such that the center of the recording paper P in the width direction X is the reference position, the difference is only about 5.5 mm. For this reason, when a sufficiently wide borderless recording area is set in consideration of the dimensional error and transport error of the recording paper P, the right end position of the borderless ink ejection area of the L size recording paper P and the postcard size or KG As shown in the figure, there is a possibility that there is almost no margin between the right end position of the size recording paper P.

  In such a state, if a rib (protrusion) is fixedly provided at the position shown by the one-dot chain line in FIG. 9, an ink ejection area when performing borderless recording on L-size recording paper P It will interfere with (the borderless ink ejection region). For this reason, when borderless recording is performed on L-size recording paper P, ink is ejected onto the top of the rib, and when recording is performed on postcard- or KG-size recording paper P, the rib Ink jetted onto the top of the recording medium adheres to the back surface of the recording paper P, causing back stains.

  On the other hand, if the ribs are provided outside the borderless ink ejection area of the L-size recording paper P, it is possible to avoid such back contamination of the recording paper P. However, the rib that should originally support the vicinity of the right end of the postcard size or KG size recording paper P is arranged outside the right end of the postcard size or KG size recording paper P. That is, when recording is performed on a postcard-size or KG-size recording paper P, there is no rib to support the right edge of the recording paper P. As a result, the vicinity of the right edge of the recording paper P is The ink hangs down and comes into contact with the ink absorbing material 532, and the ink adheres to the back surface, resulting in back stain.

  In the platen 53 according to the present invention, the first movable rib 534 is retracted to the outside of the borderless ink ejection area of the L-size recording paper P with respect to the recording paper P transported in the transport direction Y. (FIG. 9) and a second displacement position (FIG. 10) capable of supporting the vicinity of the right end of the postcard-size or KG-size recording paper P.

  When performing borderless recording on the L size recording paper P, the right movable rib 534 is placed outside the borderless ink ejection area of the L size recording paper P by setting the right movable rib 534 to the first displacement position. Can be evacuated (FIG. 9). Thus, when performing borderless recording on the L-size recording paper P, it is possible to reliably prevent ink from being ejected onto the top of the right movable rib 534. Therefore, after performing borderless recording on the L-size recording paper P, it is possible to prevent the occurrence of back stains when recording is performed on the postcard-size or KG-size recording paper P.

  When recording on a postcard size or KG size recording paper P, the right movable rib 534 is moved to a position where the postcard size or KG size recording paper P can be supported by setting the right movable rib 534 to the second displacement position. Can be arranged (FIG. 10). Accordingly, it is possible to reliably prevent a part of the recording paper P from hanging between the platen ribs 531 during execution of recording on the postcard size or KG size recording paper P. That is, it is possible to reliably prevent the ink that has been discarded by the ink absorbing material 532 from contacting and adhering to the back surface of the recording paper P when performing borderless recording. Accordingly, it is possible to prevent the recording paper P from being stained when recording is performed on the postcard size or KG size recording paper P.

  In this way, the platen 53 according to the present invention is provided with the left movable rib 533 and the right movable rib 534 that are displaceable in the direction intersecting the transport direction Y, so that the size of the recording paper P supported by the platen 53 is obtained. Accordingly, the arrangement and interval of the platen ribs 531 in the direction crossing the transport direction Y can be changed. That is, in the inkjet printer 50 including the platen 53 according to the present invention, it is possible to realize an ideal arrangement and interval of the platen ribs 531 in the direction intersecting the transport direction Y for each size of the different recording paper P. Become.

  Furthermore, the inkjet printer 50 according to the present invention preferably includes “displacement means” for displacing the left movable rib 533 and the right movable rib 534 as described above. Thereby, the left movable rib 533 and the right movable rib 534 can be displaced without the user directly operating the hand.

  This “displacement means” may be operated in conjunction with, for example, the left edge guide 72 and the right edge guide 73 as described above, or an operation lever or the like is provided separately, and the operation lever is operated by the user. You may comprise so that the left movable rib 533 and the right movable rib 534 can be manually displaced by operating. Thereby, the operability of the inkjet printer 50 can be improved. Alternatively, the left movable rib 533 and the right movable rib 534 may be automatically displaced by the driving force of a driving force source such as a motor according to the size of the recording paper P detected by a sensor or the like. This eliminates the need for the user to move the left movable rib 533 and the right movable rib 534, so that the convenience of the inkjet printer 50 can be improved.

  The “movable protrusion” in the platen 53 according to the present invention is not particularly limited to the left movable rib 533 and the right movable rib 534, and any one of the many platen ribs 531 provided on the platen 53. Is also applicable. Needless to say, the number of “movable protrusions” is not particularly limited to a specific number. That is, all of the platen ribs 531 provided on the platen 53 may be “movable protrusions”, and they may be individually displaced individually. Furthermore, a plurality of “movable protrusions” can be made to have different displacement amounts depending on the size of the recording paper P and the like so that each of them has an ideal arrangement and spacing. .

<Second embodiment of the present invention>
Next, a second embodiment of the inkjet printer 50 according to the present invention will be described with reference to FIGS.

FIG. 11 is a perspective view illustrating “displacement means” in the second embodiment. 12 and 13 are perspective views illustrating the main part of the ink jet printer 50 according to the second embodiment. FIG. 12 illustrates a state when recording is performed on the L-size recording paper P, and FIG. 13 illustrates a state when recording is performed on the postcard-size or KG-size recording paper P. Is.
Since the second embodiment is the same as the first embodiment except that the configuration of the “displacement means” is different, the illustration and description of common parts are omitted. Similarly to the first embodiment, the right movable rib 534 is described as an example, and the description of the left movable rib 533 is omitted.

  In the second embodiment, the right movable rib 534 is configured as an independent component separate from the shaft body 22, and a rack is provided at the bottom (not shown). The right movable rib 534 is supported by a guide rail (not shown) provided at a predetermined position of the platen 53, and the top of the right movable rib 534 forms a support surface having the same height as the tops of the other platen ribs 531. Displaceable so as to slide in the width direction X. Similarly to the first embodiment, the right movable rib 534 is urged in a direction away from the ridge 531 on the left side by the urging means (not shown) (toward the right). Yes.

  The rotation lever 21 is pivotally supported around a rotation shaft portion 211 provided on one end side so as to be rotatable. The rotating shaft portion 211 has irregularities formed on the outer peripheral surface at substantially equal intervals. The shaft body 22 is pivotally supported so as to be rotatable about the shaft center. A gear 221 that meshes with the pivot shaft 211 of the pivot lever 21 is provided on one end side of the shaft body 22, and a pinion that meshes with the rack of the right movable rib 534 on the other end side of the shaft body 22. A gear 222 is provided.

  When the rotation lever 21 is rotated in the direction indicated by the symbol B, the shaft body 22 is rotated in the direction indicated by the symbol C. As a result, the right movable rib 534 is slid and displaced in the direction indicated by the symbol D. As described above, the configuration in which the right movable rib 534 is slid and displaced by the rack and pinion mechanism allows the top portion of the right movable rib 534 to form a support surface having the same height as the top portions of the other platen ribs 531 with high accuracy. The right movable rib 534 can be displaced in the width direction X while maintaining. Accordingly, the interval between the recording surface of the recording paper P supported by the platen 53 and the head surface of the recording head 63 can be defined with higher accuracy regardless of the displacement position of the right movable rib 534.

<Third embodiment of the present invention>
Next, a third embodiment of the inkjet printer 50 according to the present invention will be described with reference to FIG.

FIG. 14 is a front view schematically showing the support state of the right movable rib 534 of the platen 53 in the third embodiment.
Since the third embodiment is the same as the first embodiment except that the shape of the ink absorbing material 532 is different, illustration and description of common portions are omitted. Similarly to the first embodiment, the right movable rib 534 is described as an example, and the description of the left movable rib 533 is omitted.

  The ink absorbing material 532 disposed around the right movable rib 534 is formed so as to be in contact with the right side portion 24R and the left side portion 24L of the right movable rib 534 with almost no gap as shown in the figure. The right movable rib 534 is provided integrally with the shaft body 22 and is displaced in the width direction X by the rotation of the shaft body 22. When the right movable rib 534 is displaced to one side in the width direction X (in the direction indicated by reference sign D), the left side portion 24L is deformed so that a part of the ink absorbing material 532 is pushed down in the direction indicated by reference sign E. Displacement is performed (FIG. 14A). Further, when the right movable rib 534 is displaced to the other side in the width direction X (in the direction indicated by the symbol F), the right side portion 24R pushes down a part of the ink absorbing material 532 in the direction indicated by the symbol G. It is displaced while being deformed (FIG. 14B).

  As described above, it is preferable that almost no gap is generated between the right side 24R and the left side 24L of the right movable rib 534 and the ink absorbing material 532 regardless of the displacement position of the right movable rib 534. As a result, a part of the ink discarded by the ink absorbing material 532 around the right movable rib 534 may leak into the inkjet printer 50 from the gap between the ink absorbing material 532 and the right movable rib 534. Can be reduced.

  As described above, according to the platen 53 according to the present invention, the degree of freedom of the arrangement and interval of the platen ribs 531 can be increased. Further, in the ink jet printer 50 capable of performing borderless recording, the possibility that the recording paper P may become dirty on the back can be reduced.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say.

FIG. 1 is a side sectional view of an ink jet printer. The perspective view which expanded and illustrated the principal part of the inkjet printer. The perspective view which expanded and illustrated the principal part of the inkjet printer. The top view which expanded and illustrated the principal part of the inkjet printer. The top view which expanded and illustrated the principal part of the inkjet printer. The perspective view which expanded and illustrated a part of platen. The perspective view which expanded and illustrated a part of platen. The top view which illustrated a part of platen typically. The top view which illustrated a part of platen typically. The perspective view which illustrated the "displacement means" in 2nd Example. The principal part perspective view of the inkjet printer in 2nd Example. The principal part perspective view of the inkjet printer in 2nd Example. The front view which illustrated typically the principal part of the platen in 3rd Example.

Explanation of symbols

  21 Rotating lever, 22 Shaft, 23 Top, 50 Inkjet printer, 51 Conveying drive roller, 52 Conveying driven roller, 53 Platen, 54 Discharging driving roller, 55 Discharging driven roller, 61 Carriage guide shaft, 62 Carriage, 63 Recording head , 70 Automatic feeding device, 71 Hopper, 72 Left edge guide, 73 Right edge guide, 74 Feeding roller, 75 Separation pad, 531 Platen rib, 532 Ink absorbent, 533 Left movable rib, 534 Right movable rib, P recording Paper, X recording paper width direction, Y recording paper feeding direction and conveyance direction

Claims (6)

A plurality of protrusions formed along the conveyance direction of the recording material are arranged side by side in a direction intersecting with the conveyance direction, and support the recording material at the top of the protrusions A support device ;
Ink ejecting means for ejecting ink onto the recording surface of the recording material supported by the recording material support device;
A recording apparatus comprising: a conveying unit configured to convey the recording material supported by the recording material support apparatus in the conveyance direction;
In the recording material support device, at least one of the plurality of protrusions is a movable protrusion that is disposed so as to be displaceable in a direction intersecting the transport direction.
The movable protrusion is supported by the recording material support device and is conveyed in the conveyance direction with respect to the recording material.
A first displacement position that retracts to the outside of the ink ejection area when ejecting ink onto a first size recording material;
It said first magnitude and a second displacement position capable of supporting the recording material is larger than the second size of the recording material was characterized by capable of taking the recording apparatus. The recording apparatus according to claim 1, wherein an ink absorbing material is disposed around the ridge portion and the movable ridge portion,
The movable ridge portion is supported so that the top portion of the movable ridge portion is displaced in a direction intersecting the transport direction while deforming the ink absorbing material at a side portion of the movable ridge portion. A recording device characterized by. The recording apparatus according to claim 1 , further comprising a displacement unit that displaces the movable protrusion. 4. The recording apparatus according to claim 3 , wherein the movable means displaces the displacement means by rotating an elastic shaft body. The recording apparatus according to claim 3 or 4, comprising a feeding device for feeding the recording material to said transport means,
The feeding device has a regulation means for regulating both end positions in a direction intersecting the transport direction of the recording material to be fed placed on the placement surface,
According to the size of the recording material to be fed placed on the placement surface, the restricting means engages with the displacement means, and the movable protrusion is displaced. Recording device. In the recording device according to any one of claims 1 to 5 ,
The first displacement position that can be taken by the movable protrusion is a position for retreating to the outside of the ink ejecting area when ejecting ink without margin to the recording material of the first size ,
Wherein the second displacement position in which the movable protrusions can take the recording apparatus, wherein the first is capable of supporting positions the recording material of the size of the recording material is larger than the second size .

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