JP4872843B2 - Recording device - Google Patents

Description

The present invention relates to a recording apparatus having a recording material discharge device you discharge the recording material after the recording execution.

  Inkjet printers, laser printers, thermal transfer printers, and the like are known as recording apparatuses having a recording execution unit capable of executing recording on a recording material. These general recording apparatuses are provided with a recording material discharge device for discharging the recording material after execution of recording. The recording material after recording is discharged out of the recording device by the recording material discharge device and stacked on a discharge tray or the like (see, for example, Patent Document 1).

  Incidentally, in a recording apparatus, warping of a recording material may be a problem. The warp of the recording material here means a state in which the recording material which is essentially flat and straight is deformed into a concave shape or a convex shape. From the viewpoint of the cause of warping, the warping of the recording material is caused by the structure of the recording material, the storage environment, etc., and the warpage occurring in the unused recording material before recording, and the recording of the recording material It can be roughly divided into warpage occurring in a recording material during recording due to the formation of dots on the surface.

  The warping that occurs in the recording material during recording is, for example, that the recording surface is wetted and expanded by jetting ink onto the recording surface of the recording material, and the recording material that is discharged in that state is being discharged. It occurs when it hangs down under its own weight. In this case, the recording material is warped toward the back side of the recording surface (the recording surface is warped in a convex shape). Such warpage of the recording surface to the back side of the recording material during execution of recording causes a discharge failure or a paper jam at the time of discharging the recording material.

As a conventional technique for reducing such discharge failure, for example, a regulation unit is provided on the downstream side of the discharge unit such as a discharge roller to direct the traveling direction of the recording material to be discharged toward the mounting surface of the discharge stacker. A recording material discharging apparatus is known (see, for example, Patent Document 1).
In addition, in order to prevent the recording material from drooping downward due to its own weight during discharge, a support portion which increases the apparent rigidity by giving the curved recording deformation in the width direction to the recording material to be discharged is provided. A recording device provided on the mounting surface is known (see, for example, Patent Document 2).

On the other hand, the warp that occurs in the recording material before execution of recording due to the structure of the recording material, the storage environment, and the like is, for example, when the user performs the operation of removing the curl near the leading edge when feeding the roll paper There is a warping that occurs. Specifically, in order to remove the curl near the leading edge of the roll paper, when the vicinity of the leading edge of the roll paper is rolled in the direction opposite to the winding direction, the leading edge is warped in the direction opposite to the winding direction due to excessive rounding. May end up. When recording is performed on the roll paper in this state, there is a possibility that the leading edge of the roll paper hits the discharge frame or the like at the time of discharge to cause a paper jam. As an example of a conventional technique capable of solving such a problem, a recording apparatus provided with a paper discharge guide that guides the leading end of a roll paper that is warped backward to a downstream side of the discharge means is known (for example, see Patent Document 3). reference).
JP 2002-68554 A JP 2004-106278 A JP 2003-104604 A

  However, warping that occurs in the recording material before execution of recording due to the structure of the recording material, storage environment, and the like may occur in addition to the above-described excessive winding operation of the roll paper. For example, in a multi-layered recording material such as photographic paper, depending on the storage environment, depending on the storage environment, the surface (recording surface) and the back surface have different shrinkage rates due to moisture absorption and desorption. Warpage may occur over the entire surface of the material. In this case, the recording material is often warped toward the recording surface (the recording surface is warped concavely).

  Such warpage toward the recording surface before the recording is performed causes a so-called head rubbing or the like during recording on the recording material. Here, the head rubbing means that a recording material being recorded that should not originally come into contact comes into contact with a recording head or the like that forms dots on the recording surface of the recording material. When such head rubbing occurs, the recording surface of the recording material is scratched or excessive ink or the like adheres to the recording image quality, and the recording head or the like is damaged. There is a fear.

  The present invention has been made in view of such a situation, and the problem is that, in the recording apparatus, when recording is performed on a recording material warped to the recording surface side, the head caused by the warpage is provided. The object is to reduce the possibility of deterioration of the recording image quality due to rubbing or the like and damage to the recording head.

  To achieve the above object, according to a first aspect of the present invention, there is provided a discharge means for discharging a recording material after execution of recording, a recording material discharged from the discharge means, and a discharge direction downstream of the discharge means. And a restricting means that engages and restricts warping of the recording material toward the recording surface.

  As described above, particularly in a multi-layered recording material such as photographic paper, the surface (recording surface) and the back surface have different shrinkage rates due to temperature and moisture absorption and desorption. The entire surface may be warped toward the recording surface. Such warpage of the recording material tends to be in a state of warping in a concave shape with the four corners of the recording material raised. In this way, the recording material in a state of being concavely warped toward the recording surface side, when one end side is warped toward the back surface side of the recording surface, the other end side is also warped toward the back surface side of the recording surface so as to follow it. Become. In other words, just by bending one end of the recording material to the back side, the entire surface of the recording material that has been warped to the recording surface (warped in a concave shape) is warped to the back side (warped in a convex shape). State).

  The recording material discharge device according to the first aspect of the present invention is engaged with the recording material discharged from the discharge means and on the downstream side in the discharge direction from the discharge means to the recording surface side of the recording material. There is a regulation means to regulate the warpage of This restricting means may restrict the warping of the recording-executed portion (one end side) on the recording surface side, which is discharged downstream from the discharging means, toward the recording surface with respect to the recording material discharged while the recording is being executed. it can. As a result, the recording material discharged while the recording is being performed is restricted from warping toward the recording surface over the entire surface. That is, the recording material that is discharged while recording is performed is recorded on the recording surface (the other end side) where recording is being performed on the upstream side of the discharging unit by the regulating unit on the downstream side of the discharging unit. The warping to the side is indirectly regulated.

  Thereby, according to the recording material discharging apparatus according to the first aspect of the present invention, when recording is performed on the recording material warped to the recording surface side in the recording apparatus, the discharging direction from the discharging means. Since it is possible to indirectly restrict the warping of the recording portion on the upstream side toward the recording surface, there is a possibility that the recording image quality may be deteriorated due to head rubbing or the like due to the warp or the recording head may be damaged. The effect that it can be reduced is obtained.

  According to a second aspect of the present invention, in the recording material discharge apparatus according to the first aspect described above, the restricting unit has a direction that intersects the discharge direction with respect to the recording material discharged from the discharge unit. The recording material discharge device is characterized in that the recording material is engaged in a region inside a predetermined width from both ends of the recording material.

  The restricting means engages with the recording material discharged from the discharging means in a region inside by a predetermined width from both ends of the recording material in a direction intersecting the discharging direction, so that the recording material warped in a concave shape The material engages with the vicinity of the portion with the widest warp width in the direction intersecting the discharge direction. As a result, the effect of being able to most effectively regulate the concave warpage of the recording material warped to the recording surface side is obtained.

  According to a third aspect of the present invention, in the recording material discharge apparatus according to the first aspect or the second aspect described above, the regulating means is directed to the recording surface side of the recording material discharged from the discharge means. A recording material discharge device that engages with the recording material when the warp width is equal to or greater than a certain width.

  A force in a direction that hinders the conveyance of the recording material in the recording execution unit is applied to the recording material on which recording is being performed while being discharged by the discharging unit, by engaging the regulation unit. If a force in a direction that prevents conveyance is applied to the recording material being recorded, a conveyance error or the like may occur, resulting in a decrease in recording image quality.

  In the recording material discharging apparatus according to the third aspect of the present invention, the recording material discharged by the discharging means is warped toward the recording surface by a certain width or more that may cause head rubbing or the like. Since the restricting means is engaged only when the engagement of the restricting means with respect to the recording material being discharged can be minimized. That is, when the warp to the recording surface side is less than a certain width, the regulating means does not engage with the recording material discharged by the discharging means, so that the risk of degradation of the recording image quality by the regulating means is minimized. The effect that it can be stopped is obtained.

According to a fourth aspect of the present invention, in the recorded material discharge apparatus according to any one of the first to third aspects described above, the regulating means includes a recording surface of the recorded material discharged from the discharge means, A recording material discharge device having a driven roller that engages and rotates following discharge of the recording material.
With such a configuration, it is possible to reduce the force in the direction of hindering the conveyance that acts on the recording material during execution of recording when the restricting unit is engaged, and the restricting unit is engaged with the recording surface that has been recorded. By doing so, the influence on the recording image quality can be minimized. Therefore, there is an effect that it is possible to further reduce the possibility of a decrease in recording image quality due to the restricting means.

According to a fifth aspect of the present invention, there is provided a recording material discharging apparatus according to the fourth aspect described above, wherein the driven roller is elastically supported so as to be driven to rotate. It is.
Thus, by adopting a configuration in which the driven roller that is engaged with the recording surface of the recording material is elastically supported, the contact surface pressure between the recording surface of the recording material and the regulating means can be regulated to a certain pressure or less. . Therefore, it is possible to obtain an effect that the influence on the recording image quality can be further reduced, and to reduce the possibility that the portion of the recorded recording surface engaged with the restricting means will be damaged. The effect that it can be obtained.

According to a sixth aspect of the present invention, there is provided a recording execution means for executing recording on a recording surface of a recording material, and the first to fifth aspects described above for discharging the recording material for which recording has been executed by the recording execution means. A recording apparatus comprising the recording material discharge device according to any one of the aspects.
According to the recording apparatus of the sixth aspect of the present invention, the recording execution means for executing recording on the recording surface of the recording material, and the recording target for discharging the recording material for which recording has been executed by the recording execution means. In the recording apparatus provided with the material discharging apparatus, it is possible to obtain the operational effects of the invention according to any one of the first to fifth aspects described above.

  According to a seventh aspect of the present invention, in the recording apparatus according to the sixth aspect described above, the recording execution unit includes a conveyance unit that conveys the recording material in the conveyance direction, and a conveyance direction downstream side of the conveyance unit. Dot forming means for forming dots on the recording surface of the recording material, and the recording material discharge device is disposed on the downstream side in the transport direction from the dot forming area by the dot forming means, and the regulating means is The recording apparatus is characterized in that at least an upstream side in a conveyance direction of a recording material being recorded is disposed at a position that can be engaged with the recording material before the recording material is separated from the conveyance means.

  While recording on the recording surface is being carried while the recording material is conveyed by the conveying means and discharged by the discharging means, the upstream side of the recording material in the conveying direction is engaged with the conveying means across the dot forming means. In this case, the downstream side in the transport direction of the recording material is engaged with the discharging means. For this reason, even if the recording material is warped toward the recording surface, the recording material is not lifted during recording in the dot formation region by the dot forming means. However, after the upstream side in the conveyance direction of the recording material being recorded leaves the conveyance means, the recording material is recorded while being conveyed only by the discharge means. Therefore, if the recording material is warped toward the recording surface, the upstream side in the conveyance direction of the recording material may come into contact with the dot forming means such as a recording head, and head rubbing or the like may occur.

  In the recording apparatus according to the seventh aspect of the present invention, before the upstream side in the conveyance direction of the recording material being recorded leaves the conveyance unit, the downstream side in the conveyance direction of the recording material is engaged with the regulating unit. , Warpage of the recording material toward the recording surface is restricted. As a result, even if the recording material is warped toward the recording surface, there is a possibility that the upstream side in the conveyance direction of the recording material may come into contact with the dot forming unit such as the recording head after the conveyance unit is detached. Can be reduced. Therefore, it is possible to reliably reduce the possibility that the recording image quality deteriorates due to head rubbing or the like caused by warping of the recording material to the recording surface side, or the recording head or the like is damaged.

  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.
FIG. 1 is a cross-sectional side view of a main part of an ink jet printer 50.

  The ink jet printer 50 includes a substantially box-shaped printer body 1 and a printer cover 10 as shown in the figure. On the upper surface of the printer main body 1, a feeding opening 2 for supplying the recording paper P as “recording material” is provided. The printer cover 10 is rotatably supported by the printer body 1 with the rotation shaft 111 engaged with the bearing portion 5 of the printer body 1. The opened printer cover 10 functions as a feeding tray as shown in the figure.

  The ink jet printer 50 includes a conveyance driving roller 51, a conveyance driven roller 52, a platen 53, a discharge driving roller 54, a discharge driven roller 55, a carriage 61, and a recording head 62 as “recording execution means” for executing recording on the recording paper P. It is provided in the printer body 1. In addition, the inkjet printer 50 includes a loading unit 71, an edge guide 72, a feeding roller 73, and a retard roller 74 that constitute an automatic feeding device that automatically feeds the recording paper P one by one toward the “recording execution unit”. It has.

  The placement portion 71 is disposed at a position facing the feeding opening 2. A known edge guide 72 is disposed on the placement portion 71 so as to be slidable in the width direction of the recording paper P (direction intersecting the transport direction Y), and the width of the recording paper P according to the size of the recording paper P. The mounting position in the direction can be defined. The recording paper P placed on the opened printer cover 10 is pressed against the outer peripheral surface of the feeding roller 73 by a hopper (not shown), and is driven to the transport driving roller 51 by the driving rotation of the feeding roller 73. It is sent toward. At this time, the other recording paper P is separated from the uppermost recording paper P by the known driven rotational resistance of the retard roller 74, and the double feeding of the recording paper P is prevented.

  The recording paper P fed by the driving rotation of the feeding roller 73 is sandwiched between the transport driving roller 51 and the transport driven roller 52, and the platen with a predetermined transport amount in the transport direction Y by the driving rotation of the transport driving roller 51. 53 is conveyed. At the bottom of the carriage 61, a recording head 62 is disposed as “dot forming means” for forming dots on the recording surface of the recording paper P. The carriage 61 is supported so as to be able to reciprocate in a direction substantially perpendicular to the transport direction Y while maintaining a state in which the head surface of the recording head 62 and the recording surface of the recording paper P on the platen 53 are substantially parallel and at a constant interval. Has been.

  The recording paper P conveyed on the platen 53 forms dots by ejecting ink from the head surface of the recording head 62 to the recording surface of the recording paper P while the carriage 61 reciprocates in a direction substantially perpendicular to the conveyance direction Y. Recording on the recording surface is executed by alternately repeating the operation of carrying out the recording paper P by the predetermined conveyance amount in the conveyance direction Y by the driving rotation of the conveyance driving roller 51. The recording paper P after ink ejection is sandwiched between a discharge driving roller 54 and a discharge driven roller 55 that constitute “discharge means”, and is transported in the transport direction Y by the drive rotation of the discharge drive roller 54, and recording after recording is performed. The paper P is discharged onto the open discharge tray 3.

<Configuration of recording material discharge device>
Next, the configuration of the “recorded material discharging apparatus” according to the present invention will be described with reference to FIGS.

FIG. 2 is a perspective view illustrating a “recording material discharging apparatus” according to the present invention. FIG. 3 is a front view thereof, and FIG. 4 is a side sectional view thereof.
The “discharge means” that discharges the recording paper P after execution of recording has an auxiliary roller 56 in addition to the discharge drive roller 54 and the discharge driven roller 55. The known auxiliary roller 56 is for preventing a defective discharge of a small recording paper P such as a postcard. The discharge drive roller 54 is a rubber roller made of a rubber material, and a plurality of discharge drive rollers 54 are disposed on one discharge drive roller shaft 541. By rotating the discharge drive roller shaft 541 with a rotational drive force such as a motor (not shown), a plurality of discharge drive rollers 54 can be rotated simultaneously.

  The discharge driven roller 55 and the auxiliary roller 56 are so-called well-known toothed serrated rollers. The plurality of discharge driven rollers 55 and the auxiliary roller 56 are pivotally supported by a roller holder 7 disposed on the discharge frame 6 so as to be individually driven and rotated. The discharge driven roller 55 is pivotally supported so as to be driven and rotated by a bar spring 551 so as to be in a state of being urged against the outer peripheral surface of the discharge drive roller 54 (FIG. 4). The discharge driven roller 55 presses the recording paper P against the outer peripheral surface of the discharge driving roller 54 while contacting the recording surface of the recording paper P that has been recorded. The auxiliary roller 56 is disposed between the recording head 62 (FIG. 1) and the discharge driven roller 55, and is pivotally supported so as to be driven to rotate by the bar spring 561 (FIG. 4).

  When recording on the recording paper P is executed, the discharge driving roller shaft 541 is rotated by the rotational driving force of a motor (not shown) in conjunction with the rotation of the transport driving roller 51. As a result, the plurality of discharge drive rollers 54 rotate synchronously with substantially the same feed amount as the transport drive roller 51. The recording paper P pressed against the outer peripheral surface of the discharge driving roller 54 by the discharge driven roller 55 is transported in the transport direction Y by the rotation of the discharge drive roller 54 and is discharged onto the discharge tray 3.

  On the downstream side of the discharge driven roller 55 in the transport direction Y, two warp regulating rollers 57 as “regulating means” are disposed. The two warp regulating rollers 57 are so-called known toothed serrated rollers, and are supported by the roller holder 7 so as to be individually driven and rotatable. The warp restricting roller 57 engages with the recording paper P discharged by the rotation of the discharge driving roller 54 and restricts the warping of the recording paper P toward the recording surface. The two warp regulating rollers 57 are located near both ends of the recording paper P in the width direction X (direction intersecting the transport direction Y) when the recording paper P of a predetermined size (for example, 4 × 6 size) is discharged. They are respectively arranged at positions corresponding to the recording surface. The warpage restriction of the recording paper P by the warpage restriction roller 57 will be described later.

<Recording paper warped to the recording surface>
Here, the recording paper P in a state of warping toward the recording surface will be described with reference to FIGS.

FIG. 5 is a perspective view schematically showing the recording paper P in a state of being warped to the recording surface side. FIG. 6 is a side view schematically showing a main part of a state in which recording is performed on a recording paper P in a state of being warped toward the recording surface by a conventional ink jet printer.
Note that the direction indicated by Z is a direction that intersects both the width direction X and the conveyance direction Y (hereinafter, simply referred to as “Z direction”). Further, the recording paper P has a “recording surface” on the front surface side (the upper surface side in the drawing), and so on.

  The unused recording paper P before recording is normally flat and straight as shown by the symbol Pt (FIG. 5). However, the recording paper P having a multilayer structure such as a photographic paper has a different shrinkage rate due to temperature and moisture absorption and desorption on the front surface (recording surface) and the back surface. As a result, the recording paper P having a multilayer structure such as photographic paper is in a state in which the recording paper P is warped toward the recording surface in a concave shape with the four corners of the recording paper P raised as shown in the figure. (FIG. 5).

  Such warpage of the recording paper P toward the recording surface is likely to occur particularly in an environment with low humidity such as in winter when the recording paper P is not stored in a sealed storage bag or the like and exposed to the atmosphere. Then, the recording paper P warped in a concave shape comes into contact with the recording head 62 after the upstream side in the transport direction Y is released from the nipping between the transport driving roller 51 and the transport driven roller 52 during recording. (FIG. 6). When such head rubbing occurs, the recording surface of the recording paper P is scratched or excessive ink or the like adheres, so that the recording image quality deteriorates and the recording head 62 is damaged. There is a fear.

7 and 8 are perspective views schematically showing the recording paper P in a state of being warped to the recording surface side, and showing a state in which the downstream side in the transport direction Y is warped to the back surface side.
First, with respect to the recording paper P in a state of being concavely warped toward the recording surface side, the vicinity of both ends in the width direction X on one end side (downstream side in the transport direction Y) is warped toward the back surface side (reference C). As a result, a tensile stress D acts on the recording surface side and a compressive stress E acts on the back surface side of the central portion of the recording paper P that is warped concavely. Due to the tensile stress D and the compressive stress E, the central portion of the recording paper P that is warped in a concave shape is subjected to a force in the direction indicated by G, and is warped in a convex shape due to the force (see FIG. 7).

  Then, when one end side and the central portion of the recording paper P are warped in a convex shape, a compressive stress H is applied to the recording surface side on the other end side (upstream side in the transport direction Y) of the recording paper P. The tensile stress J acts on the back side. Due to the compressive stress H and the tensile stress J, the other end side of the recording paper P that is warped in a concave shape is subjected to a force in the direction indicated by the symbol K, and is warped in a convex shape due to the force. As a result, the entire recording paper P is warped in a convex shape toward the recording surface (FIG. 8).

  That is, the recording paper P in a state of being concavely warped toward the recording surface side is pushed downward in the direction indicated by reference numeral C in the vicinity of both side ends in the width direction X on one end side to bend toward the back surface side (FIG. 7). The other end also warps to the back side of the recording surface so as to follow (FIG. 8).

<Warpage restriction of recording paper P in recording material discharge device>
Next, the warpage regulating roller 57 that regulates the warping of the recording paper P toward the recording surface will be described in detail with reference to FIG.
FIG. 9 is a side view of a main part of the ink jet printer 50, and schematically shows a state in which the warpage of the recording paper P toward the recording surface side is regulated by the warpage regulating roller 57.

  As shown in the figure, the warp regulating roller 57 as the “regulating means” is downstream in the ejection direction (conveying direction Y) with respect to the recording paper P being ejected by the ejection driving roller 54 and the ejection driven roller 55 while recording is being performed. The recording sheet P is disposed at a position where it can come into contact with the recording surface of the recording-executed portion on the side and the warpage of the recording paper P toward the recording surface can be regulated. The recording paper P in a state of being concavely warped toward the recording surface side is pushed down in the direction indicated by the reference symbol C by the warpage regulating roller 57 on the downstream side in the transport direction Y.

  As a result, as described above, a force of pushing down in the direction indicated by the symbol K acts on the upstream side in the transport direction Y of the recording paper P, and as a result, the warp of the upstream portion in the transport direction Y to the recording surface side is caused. It is indirectly regulated by the regulation roller 57. That is, the warp regulating roller 57 regulates the warp of the recording paper P toward the recording surface on the downstream side in the transport direction Y, so that the upstream side in the transport direction Y of the recording paper P is the transport drive roller 51 and the transport driven roller 52. It is possible to reduce the possibility that the recording head 62 comes into contact with the recording head 62 after it is released from the nipping.

Here, the position in the width direction X of the two warp regulating rollers 57 will be described.
The positions of the two warp regulating rollers 57 in the width direction X (FIGS. 2 and 3) are recorded in the vicinity of both ends in the width direction X when the recording paper P of a predetermined size (for example, 4 × 6 size) is discharged. The position corresponding to the surface is set. The two warp regulating rollers 57 are in contact with the recording surface in a region inside by a predetermined width from both ends in the width direction X when recording is performed on the recording paper P that is warped to the recording surface side and discharged. . Therefore, the two warp regulating rollers 57 are engaged with the vicinity of the widest portion of the warp width in the width direction X with respect to the recording paper P warped in a concave shape. As a result, it is possible to most effectively regulate the concave warpage of the recording paper P that has warped toward the recording surface.

  The predetermined width is preferably as small as possible within a range in which the warp regulating roller 57 can be reliably brought into contact with the recording surface. As a result, the warp regulating roller 57 is brought into contact with the portion having the widest warp width in the width direction X of the recording paper P, that is, the recording surface as close as possible to both ends in the width direction X of the recording paper P, thereby controlling the warping toward the recording surface. can do.

  Next, the technical significance of setting the positions in the width direction X of the two warp regulating rollers 57 in correspondence with the recording paper P having a predetermined size (for example, 4 × 6 size) will be described.

  For example, in the case of a recording paper P having a relatively large size such as A4 size, when recording is performed in a state of warping toward the recording surface as described above, the portion of the paper discharged from the discharge driving roller 54 Under its own weight, it bends downward and warps to the back side. In other words, in the case of a recording paper P having a relatively large size such as A4 size, warping to the recording surface side is regulated by its own weight during discharge, so that there is almost no need to regulate by the warp regulating roller 57. On the other hand, in the case of the recording paper P having a comparatively small size such as a business card size, the warp width is small even if the recording paper is warped to the recording surface side. Hardly occurs.

  That is, the recording paper P that is most likely to rub the head when warped to the recording surface side is a recording paper P that is warped with a warping width of a certain level or more and is less likely to bend downward due to its own weight. Specifically, for example, 4 × 6 size photographic paper. Accordingly, the positions in the width direction X of the two warp regulating rollers 57 are set in correspondence with the recording paper P having a size (for example, 4 × 6 size) that is most likely to cause head rubbing in a state of warping toward the recording surface. Is preferable, and it is possible to prevent head rubbing or the like of the recording paper P with higher accuracy.

Next, the position of the two warp regulating rollers 57 in the transport direction Y will be described.
The recording paper P is conveyed by the rotation of the conveyance driving roller 51 and is being discharged by the rotation of the discharge driving roller 54 while recording on the recording surface is being performed. The upstream side is sandwiched between the transport drive roller 51 and the transport driven roller 52, and the downstream side in the transport direction Y is sandwiched between the discharge drive roller 54 and the discharge driven roller 55. Therefore, even if the recording paper P is warped toward the recording surface, the recording paper P being recorded does not float from the platen 53 in the dot formation region by the recording head 62, and head rubbing or the like does not occur.

  However, after the upstream side in the conveyance direction Y of the recording paper P is released from the nipping by the conveyance driving roller 51 and the conveyance driven roller 52, the recording paper P is recorded while being conveyed only by the rotation of the discharge driving roller 54. . Therefore, if the recording paper P is warped toward the recording surface, the upstream side in the transport direction Y of the recording paper P may come into contact with the recording head 62 to cause head rubbing or the like (FIG. 6).

  For this reason, the position of the two warp regulating rollers 57 in the transport direction Y is such that at least the upstream side in the transport direction Y of the recording paper P is separated from the nipping by the transport drive roller 51 and the transport driven roller 52. It is set at a position where it can come into contact with the recording surface of the recording paper P. In other words, the recording sheet P being recorded has its recording surface in contact with the warp regulating roller 57 on the downstream side in the transport direction Y before the upstream side in the transport direction Y is released from the nipping by the transport drive roller 51 and the transport driven roller 52. Warpage to the side is regulated.

  Accordingly, when recording is performed on the recording paper P in a state of being warped toward the recording surface, the upstream side in the transport direction Y of the recording paper P released from the nipping by the transport driving roller 51 and the transport driven roller 52 is the recording head 62. It is possible to reliably reduce the risk of contact. Therefore, it is possible to reliably reduce the possibility that the recording image quality is deteriorated or the recording head 62 is damaged due to head rubbing or the like caused by warping of the recording paper P toward the recording surface.

Next, the positions in the Z direction of the two warp regulating rollers 57 will be described.
The positions of the two warp restricting rollers 57 in the Z direction are positions where the warp restricting roller 57 is in contact with the recording surface of the recording paper P when the warping width of the discharged recording paper P toward the recording surface is a certain width or more. Is set to That is, the warpage regulating roller 57 is disposed at a position in contact with the recording surface only when the recording surface P is warped toward the recording surface with a certain width (for example, about 1 mm) or more that may cause head rubbing or the like. Has been. More specifically, the warpage regulating roller 57 is disposed above the tangent line of the roller peripheral surface at the contact point between the discharge driving roller 54 and the discharge driven roller 55 by a certain width (for example, about 1 mm).

  Therefore, when the warp to the recording surface side does not occur, or when the warp width to the recording surface side is less than a certain width, the warp regulating roller 57 does not contact the recording surface of the recording paper P being discharged. Become. This makes it possible to minimize the contact of the warpage regulating roller 57 with the recording surface of the recording paper P being discharged, so that the recording image quality deteriorates due to the warpage regulating roller 57 coming into contact with the recording surface after recording is performed. The risk of this can be minimized.

  The two warp regulating rollers 57 are pivotally supported by the roller holder 7 so as to be individually driven and rotated (FIG. 4). In other words, the warp regulating roller 57 rotates following the conveyance of the recording paper P in the conveyance direction Y when it comes into contact with the recording surface of the recording paper P being discharged. As a result, it is possible to minimize the force in the direction that prevents the conveyance in the conveyance direction Y that acts on the recording paper P when the warp regulating roller 57 contacts the recording surface.

The two warp regulating rollers 57 are so-called known toothed jagged rollers. As a result, the influence on the recording image quality and the like when the warpage regulating roller 57 contacts the recording surface on which recording has been performed can be minimized. Accordingly, it is possible to further reduce the possibility of a decrease in recording image quality due to the warp regulating roller 57.
Further, the two warp regulating rollers 57 are elastically supported by the roller holder 7 while being supported by the bar spring 571 (FIG. 4). As a result, the contact surface pressure between the recording surface of the recording paper P and the warp regulating roller 57 can be regulated to a predetermined pressure or less, so that the influence of the warp regulating roller 57 on the recording image quality can be further reduced. In addition, it is possible to reduce the possibility that the recording surface on which the recording has been performed will be damaged by the teeth of the toothed serrated roller.

<Effect of the invention>
As described above, according to the “recording material discharge device” according to the present invention, when recording is performed on the recording paper P in a state of being warped to the recording surface side in the ink jet printer 50, it is caused by the warpage. It is possible to reduce the possibility that the recording image quality deteriorates due to head rubbing or the like, or the recording head 62 is damaged.

  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.

The principal part sectional side view of an inkjet printer. FIG. 3 is a perspective view illustrating a “recorded material discharge device” according to the present invention. The front view which illustrated the "recording material discharge apparatus" concerning this invention. FIG. 3 is a side sectional view illustrating a “recording material discharging apparatus” according to the present invention. The perspective view which illustrated typically the recording paper of the state which curved in the recording surface side. The principal part side view which illustrated the state which performed recording with the conventional printer. A state where the downstream side of the recording paper in the state of being warped to the recording surface side is warped to the back side. A state where the downstream side of the recording paper in the state of being warped to the recording surface side is warped to the back side. A state in which the warpage of the recording paper to the recording surface side is regulated by a warpage regulating roller.

Explanation of symbols

50 Inkjet printer, 51 Conveyance drive roller, 52 Conveyance driven roller, 53 Platen, 54 Discharge drive roller, 55 Discharge driven roller, 56 Auxiliary roller, 57 Warpage restriction roller, 61 Carriage, 62 Recording head, 71 Placement section, 72 Edge Guide, 73 Feed roller, 74 retard roller, P recording paper, X width direction, Y recording paper transport direction

Claims (3)

Recording material,
Conveying means for conveying the recording material;
Dot forming means provided on the downstream side of the transport means in the transport direction and for recording on the recording material transported by the transport means;
A discharge means provided on the downstream side in the transport direction of the dot forming means, for discharging the recording material after recording;
E Bei and a restricting means for restricting the warpage of the recording surface of the recording medium engages in the discharge direction downstream of the said exhaust means and the recording material is discharged from said discharge means,
The restricting means engages with the recording material at both ends of the recording material in a direction intersecting the discharging direction, and is disposed vertically above the discharging means,
The recording material has a downstream end in the discharge direction of the recording material that reaches the regulating means before the upstream end in the discharge direction of the recording material is separated from the conveying means.
A recording apparatus . The recording apparatus according to claim 1, wherein the regulating means, said engaging the recording surface of the recording material discharged from the discharge means, have a driven roller which rotates following the the discharge of the recording medium is doing,
A recording apparatus characterized by that. The recording apparatus according to claim 2 , wherein the driven roller is elastically supported so as to be driven to rotate.
A recording apparatus characterized by that.

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