JP4193047B2 - Recording device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a recording apparatus including a recording medium stacker for stacking recording media and a guide surface for guiding a recording medium rear end separated from a discharge roller for discharging the recording medium to the recording medium stacker. .
[0002]
Here, the liquid ejecting apparatus uses an ink jet recording head, and is not limited to a recording apparatus such as a printer, a copying machine, and a facsimile machine that discharges ink from the recording head to perform recording on a recording medium. And a device that ejects the liquid corresponding to the application from the liquid ejecting head corresponding to the ink jet recording head to the ejected medium corresponding to the recording material, and adheres the liquid to the ejected medium. .
[0003]
In addition to the recording head, as a liquid ejecting head, a color material ejecting head used for manufacturing a color filter such as a liquid crystal display, and an electrode material (conductive paste) used for forming an electrode such as an organic EL display or a surface emitting display (FED) Examples thereof include an ejection head, a bioorganic matter ejection head used for biochip production, and a sample ejection head as a precision pipette.
[0004]
[Prior art]
A recording apparatus represented by a FAX, a printer, or the like includes a recording head that records on a recording medium, a discharge roller that is provided downstream of the recording head and discharges the recording medium on which recording has been performed, and the discharge Some include a recording medium stacker that is provided downstream of the roller and stacks recording media that are discharged by the discharge roller. In such a configuration, the recording medium on which recording has been performed is sequentially discharged onto the recording medium stacker by the discharge roller, and is sequentially stacked.
[0005]
In addition, depending on the recording apparatus, there may be a case where a component such as a waste liquid tank that stores ink droplets discarded from the side edge of the recording medium when performing borderless recording is disposed immediately below the discharge roller. is there. With such a configuration, the trailing edge of the recording medium discharged from the discharge roller does not fall into the recording medium stacker, but remains on the edge of the waste liquid tank, and the recording medium is kept in an appropriate state. There is a possibility that they cannot be stacked on the recording medium stacker. Therefore, in order to solve such a problem, it is effective to provide a guide member for dropping the trailing end of the recording medium that has come off the discharge roller to the recording medium stacker (see Patent Document 1). In other words, the recording medium is appropriately mounted on the recording medium stacker by sliding the trailing end of the recording medium by a guide surface formed by an inclined surface extending from the vicinity of the discharge roller toward the recording medium stacker. Can be stacked.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 2003-112659
[Problems to be solved by the invention]
By the way, the above-described guide member is constituted by itself and separately attached to a frame or the like constituting the base of the recording apparatus, which causes a cost increase. In addition, since it is difficult to obtain the position accuracy of the guide surface with respect to the discharge roller, there is a possibility that the recording medium cannot be slid down straight toward the recording medium stacker.
Accordingly, the present invention has been made in view of such problems, and a problem thereof is to dispose a guide member that appropriately drops a recording medium toward a recording medium stacker at low cost and with high accuracy. is there.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, a first aspect of the present invention provides a recording head for recording on a recording medium and a distance between the recording medium and the recording head, which is provided to face the recording head. And a platen having a recess for receiving ink droplets ejected from a portion off the edge of the recording medium, and a waste liquid tray provided at a lower portion of the platen for storing ink droplets discharged from the recess. A discharge roller that is provided downstream of the recording head and discharges the recording medium on which recording has been performed; and a recording medium that is provided downstream of the discharge roller and stacks the recording medium discharged by the discharge roller A guide surface that is provided between the stacker and the discharge roller and the recording medium stacker and guides the trailing end of the recording medium separated from the discharge roller to the recording medium stacker. A wall portion that rises upward from the waste liquid tray positioned below the discharge roller on the downstream side of the discharge roller and extends in the width direction of the recording medium, and a top portion of the wall portion And a guide portion for forming the guide surface so as to be directed from the recording medium stacker to the recording medium stacker.
[0009]
According to the first aspect, the guide portion that forms the guide surface that guides the recording medium rear end separated from the discharge roller to the recording medium is integrated with the waste liquid tray that stores the ink droplets discharged from the platen. Therefore, the guide surface can be provided at a low cost, and the guide surface can be positioned with high accuracy with respect to the discharge roller. It can be dropped toward the stacker. In addition, the wall portion that rises upward from the waste liquid tray and extends in the width direction of the recording medium can increase the rigidity of the guide surface (guide portion) in the width direction of the recording medium, and the guide surface (guide portion). As a result, the trailing end of the recording medium can be appropriately dropped toward the recording medium stacker.
[0010]
According to a second aspect of the present invention, in the first aspect, the guide surface is formed by an inclined surface that faces the recording medium stacker from the vicinity of the downstream side of the discharge roller.
According to the second aspect, the guide surface is formed by an inclined surface that faces the recording medium stacker from the vicinity of the downstream side of the discharge roller. Can be dropped towards
[0011]
According to a third aspect of the present invention, there is provided a recording head for recording on a recording medium, a platen provided to face the recording head and defining a distance between the recording medium and the recording head, and the recording head. A discharge roller that is provided downstream and discharges the recording medium on which recording has been performed; a recording medium stacker that is provided downstream of the discharge roller and stacks the recording medium discharged by the discharge roller; and the discharge And a guide surface provided between the roller and the recording medium stacker for guiding the recording medium rear end separated from the discharging roller to the recording medium stacker. A wall portion that rises upward from below and extends in the width direction of the recording medium on the downstream side of the recording medium, and the guide surface is formed so as to face the recording medium stacker from the top of the wall portion. A guide portion for, characterized in that it is integrally formed with the platen.
[0012]
According to the third aspect, since the guide surface that guides the recording medium rear end separated from the discharge roller to the recording medium is provided integrally with the platen, similarly to the first aspect described above. The guide surface can be provided at a low cost, and the guide surface can be positioned with high accuracy with respect to the discharge roller, and the rear end of the recording medium is appropriately dropped toward the recording medium stacker. be able to. In addition, the wall portion that rises upward from the waste liquid tray and extends in the width direction of the recording medium can increase the rigidity of the guide surface in the width direction of the recording medium without causing deformation of the guide surface. This also allows the trailing edge of the recording medium to be appropriately dropped toward the recording medium stacker.
[0013]
According to a fourth aspect of the present invention, a liquid ejecting head that ejects liquid onto the ejected medium, and the liquid ejecting head are provided opposite to the liquid ejecting head, defining a distance between the ejected medium and the liquid ejecting head, and ejecting A platen having a recess for receiving the liquid ejected to a portion off the edge of the medium; a waste liquid tray provided at a lower part of the platen for storing the liquid discharged from the recess; and A discharge roller that is provided downstream and discharges the discharge target medium that has undergone liquid injection; a discharge medium stacker that is provided downstream of the discharge roller and stacks the discharge target medium discharged by the discharge roller; and A guide surface that is provided between the discharge roller and the ejected medium stacker and guides the rear end of the ejected medium separated from the discharge roller to the ejected medium stacker. A liquid ejecting apparatus, comprising: a wall portion that rises upward from the waste liquid tray positioned below the discharge roller on the downstream side of the discharge roller and extends in the width direction of the medium to be ejected; A guide portion that forms the guide surface is formed integrally with the waste liquid tray so as to face the ejection medium stacker.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. Here, FIG. 1 is an external perspective view of an apparatus main body of an ink jet printer (hereinafter referred to as “printer”) 1 as an example of “recording apparatus” and “liquid ejecting apparatus” according to the present invention, and FIG. FIGS. 3 and 3 are external perspective views of the waste liquid tray 31 and the guide unit 33, and FIGS. 4A and 4B are side views of the guide unit 33 and the stacker 35. FIG.
[0015]
First, the configuration of the printer 1 will be outlined with reference to FIGS. 1 and 2. The printer 1 is configured in a small size suitable for recording on a recording paper P such as a “recording medium”, an “ejecting medium” as a postcard, and an L size, and is suitable for A4 size recording. As in the case of a typical ink jet printer, a paper feeding device 2 capable of setting a plurality of recording papers P in an inclined posture at the rear of the apparatus, and a carriage 25 provided so as to be able to reciprocate in the main scanning direction in the middle of the apparatus. A stacker 35 for stacking recording sheets P on which recording has been performed is provided.
[0016]
The paper feeding device 2 includes a hopper 10, a movable guide 9, a fixed guide 8, a feeding roller 11, a friction separating material 13, and a paper return lever 12. The hopper 10 is provided so as to be oscillated and driven by a driving means (not shown) around the oscillating fulcrum 10a. The hopper 10 supports the recording paper P in an inclined posture and records the recording paper P on the feeding roller 11 when the recording paper P is fed. The paper P is brought into pressure contact. The fixed guide 8 and the movable guide 9 provided in the hopper 10 regulate the position of the side edge of the recording paper P, and the movable guide 9 has a width of the recording paper P so as to correspond to each size of the recording paper P. It is slidable in the direction.
[0017]
The feeding roller 11 has a substantially D shape when viewed from the side, and a rubber material is wound around the outer periphery thereof. The feeding roller 11 is selectively rotated when a sheet is fed by a driving motor (not shown). At the time of paper feeding, the uppermost sheet of the recording paper P pressed against the feeding roller 11 by the circular arc portion is fed to the downstream side, and when the paper feeding is completed, the conveyance operation by the downstream conveyance driving roller 21 is performed. At this time, control is performed so that a flat portion in a substantially D shape in a side view is opposed to the friction separating member 13 so as not to cause a conveyance load. Note that a roller indicated by reference numeral 14 is a freely rotatable idle roller, and is rotated in contact with the recording sheet P being conveyed so that the recording sheet P being conveyed does not contact the feeding roller 11 to cause a conveyance load. . In this embodiment, the idle rollers 14 are provided on both sides of the feed roller 11 so as to sandwich the feed roller 11.
[0018]
A friction separating material 13 is provided at a position facing the feeding roller 11. The friction separating material 13 is pressed against the arc portion of the feeding roller 11 during paper feeding to form a pressure contact, whereby the uppermost recording paper P to be fed and the next order to be double fed. The subsequent recording paper P is separated. Further, a paper return lever 12 is provided at a position facing the feeding roller 11. The paper return lever 12 is provided so as to be able to swing around a swinging fulcrum 12a. During the one rotation operation of the feeding roller 11, the paper return lever 12 is temporarily set so as to open the recording paper P feeding path from the standby state shown in FIG. By falling down and rising again as shown in FIG. 2, the next and subsequent recording sheets P to be double fed are returned onto the hopper 10.
[0019]
The above is the sheet feeding device 2, and a conveyance driving roller 21 and a conveyance driven roller 22 are provided on the downstream side of the sheet feeding device 2. The transport drive roller 21 is rotationally driven by a drive motor (not shown), and the transport driven roller 22 is pressed against the transport drive roller 21 and rotated. The transport driving roller 21 is formed by attaching a coating film to the outer periphery of a metal rod that is long in the axial direction, and a plurality of transport driven rollers 22 are provided at predetermined intervals in the axial direction of the transport driving roller 21. . Then, the recording paper P fed by the feeding roller 11 is nipped between the transport driving roller 21 and the transport driven roller 22 and transported to the recording head 26.
[0020]
In addition, a free-rotating guide roller 23 is provided at the downstream end of the conveyance driven roller holder 20 that pivotally supports the conveyance driven roller 22. The guide roller 23 is a roller for preventing the recording paper P from lifting from the platen 28, and thereby the distance between the recording paper P and the recording head 14 is kept constant.
[0021]
A paper detector 17 including a detection lever 15 and a detection unit 16 is provided between the feeding roller 11 and the conveyance drive roller 21. The detection lever 15 is provided so as to be able to swing around a swinging fulcrum 15a, and the upper part from the swinging fulcrum 15a is configured to come into contact with the recording paper P to be fed. The detection unit 16 is an optical sensor. When the lower part of the detection lever 15 enters the detection unit 16 as shown in the figure from the swing fulcrum 15a, light from the light emitting unit to the light receiving unit is blocked, and the recording paper P A non-passing state is detected. When the detection lever 15 swings with the passage of the recording paper P, the lower portion of the detection lever 15 is disengaged from the swinging fulcrum 15a from the detection unit 16, thereby detecting the passage of the leading edge of the recording paper P. You can do it. Further, when the trailing edge of the recording paper P passes, the lower end portion of the detection lever 15 enters the detection unit 16 again, whereby the passage of the trailing edge of the recording paper P can be detected.
[0022]
Next, a recording head 26 and a platen 28 are provided on the downstream side of the transport driving roller 21 so as to face each other in the vertical direction. The recording head 26 is provided at the bottom of the carriage 25, and performs recording by ejecting (jetting) ink droplets as an example of a liquid toward the recording paper P. A carriage guide shaft 27 extending in the main scanning direction is inserted into the carriage 25, and is fixed to a part of an endless belt 24 (FIG. 1) extending in the main scanning direction. Then, it receives power from the carriage motor 19 (FIG. 1) and is driven to reciprocate in the main scanning direction while being guided by the carriage guide shaft 27. In the present embodiment, the carriage 25 is not mounted with an ink cartridge, but from an ink cartridge (not shown) fixed to the bottom of the main body of the printer 1 to the recording head 26 via an ink tube (not shown). And ink are supplied.
[0023]
The platen 28 defines the gap between the recording paper P and the recording head 25 by supporting the recording paper P from below, but a recess 28 a is formed on the surface facing the recording head 25. This is for printing without margins on the recording paper P. When ink droplets are ejected to the edge of the recording paper P, ink droplets are ejected to the part off the recording paper P, Then, so-called borderless printing is performed by discarding into the concave portion 28a. An ink absorbing material 36 (FIG. 1) that absorbs ink droplets is disposed in the recess 28a.
The ink droplets discarded in the recess 28a are discharged downward from a discharge hole (not shown), and a waste liquid tray 31 for receiving the discharged ink droplets is provided below the platen 28. A waste liquid absorber 34 is provided inside the waste liquid tray 31 to reliably hold the ink waste liquid in the waste liquid tray 31.
[0024]
Subsequently, a discharge driving roller 29 and a discharge driven roller 30 are provided on the downstream side of the recording head 26. The discharge drive roller 29 is rotationally driven by a drive motor (not shown), and the discharge driven roller 30 is driven to rotate in contact with the discharge drive roller 29. The recording sheet P on which recording has been performed is discharged toward the stacker 35 by being nipped by these rollers.
[0025]
As shown in the figure, the stacker 35 is provided so as to be rotatable (openable and closable) about a rotation shaft 35a. When not in use, the stacker 35 is closed so as to have a substantially vertical posture as indicated by a virtual line. In use, as shown by a solid line (see also FIG. 1), the recording sheets P are opened so as to face slightly upward, and the discharged recording sheets P are sequentially stacked.
[0026]
Here, between the stacker 35 and the discharge drive roller 29, a guide portion 33 that forms a guide surface 33a obliquely downward from the discharge drive roller 29 to the stacker 35 is disposed. The rear end of P smoothly slides down to the stacker 35.
The above is the outline of the printer 1, and the guide surface 33a will be described in detail below. 4A and 4B show the function of the guide surface 33a. As shown in FIGS. 4A and 4B, the trailing edge of the recording paper P discharged by the discharge driving roller 29 slips off the guide surface 33a after being detached from the discharging driving roller 29, so that the recording paper P Are correctly stacked on the stacker 35. That is, the guide surface 33 a guides the rear end of the recording paper P to the stacker 35. Even if the trailing edge of the recording paper P remains on the guide surface 33a, the recording paper P is subsequently dropped on the stacker 35 under the influence of the recording paper P that is sequentially discharged and stacked correctly. In this way, the guide surface 33a is related to various conditions such as the positional relationship of the stacker 35 and the size of the discharged recording paper P so as to perform the function of sliding the rear end of the recording paper P toward the stacker 35. It is desirable to determine the inclination angle and shape, and it is desirable that the surface be formed as a smooth surface. Furthermore, the guide surface 33a is not limited to the inclined surface as in the present embodiment, and may be formed by a curved surface, for example.
[0027]
Here, in the present embodiment, as shown in FIG. 3 or FIG. 4, the recording sheet P rises in the width direction while rising upward from the waste liquid tray 31 positioned below the discharge drive roller 29 on the downstream side of the discharge drive roller 29. And a guide portion 33 that forms a guide surface 33a from the top of the wall portion 32 toward the stacker 35 are integrally formed with the waste liquid tray 31 by resin molding.
[0028]
This is due to the following reason. In other words, if the guide portion 33 is formed as a single unit, it is necessary to separately attach such a guide portion 33 to a frame or the like constituting the base of the printer 1, which causes a cost increase and discharge drive roller. As a result, it is difficult to obtain the positional accuracy of the guide surface 33a with respect to 29, the recording paper P may not be able to slide straight down toward the stacker 35. However, since the guide portion 33 is formed integrally with the waste liquid tray 41 as described above, the guide surface 33a can be provided at low cost, and compared with the case where the guide portion 33 is formed as a single unit. Thus, it can be positioned with high accuracy with respect to the discharge drive roller 29, and the recording paper P can be appropriately dropped toward the stacker 35. In addition, the wall portion 32 that rises upward from the waste liquid tray 31 and extends in the width direction of the recording paper P can increase the rigidity of the guide surface 33a (guide portion 33) in the width direction of the recording paper P. The deformation of the guide portion 33) is not caused, and this also makes it possible to appropriately drop the recording paper P toward the stacker 35.
[0029]
In this embodiment, the tray unit 33 is provided integrally with the waste liquid tray 31, but may be provided integrally with the platen 28 as shown in FIG. In other words, since the printer that does not have a configuration for performing recording without margins on the side edge of the recording paper P does not include the waste liquid tray 31, in such a case, as shown in FIG. The portion 33 is provided integrally with the platen 28 ′, whereby the guide surface 33 a can be provided at low cost and can be positioned with high accuracy with respect to the discharge drive roller 29, as in the present embodiment. The recording paper P can be appropriately dropped toward the stacker 35.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a main body of a printer according to the present invention.
FIG. 2 is a schematic side sectional view of a printer according to the present invention.
FIG. 3 is an external perspective view of a waste liquid tray and a guide unit.
FIG. 4 is a side view of a guide unit and a stacker.
FIG. 5 is a side view showing another embodiment of the platen.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Inkjet printer, 2 Paper feeder, 8 Fixed guide, 9 Movable guide, 10 Hopper, 11 Feed roller, 12 Paper return lever, 13 Friction separation material, 14 Idle roller, 15 Paper detection lever, 16 Detection part, 17 Paper Detector, 19 Carriage motor, 20 Conveyance driven roller holder, 21 Conveyance drive roller, 22 Conveyance driven roller, 23 Guide roller, 24 Carriage belt, 25 Carriage, 26 Recording head, 27 Carriage guide shaft, 28 Platen, 28a Concavity, 29 Discharge drive roller, 30 Discharge driven roller, 31 Waste liquid tray, 32 Wall part, 33 Guide part, 33a Guide surface, 34 Waste liquid absorber, 35 Stacker, 36 Ink absorber, P Recording paper

Claims (1)

A recording head for recording on a recording medium;
A platen provided opposite to the recording head, defining a distance between the recording medium and the recording head, and having a recess for receiving ink droplets ejected from a portion off the end of the recording medium;
A waste liquid tray provided at a lower portion of the platen and storing ink droplets discharged from the recess;
A discharge roller that is provided downstream of the recording head and discharges the recording medium on which recording is performed;
A recording medium stacker that is provided downstream of the discharge roller and stacks the recording medium discharged by the discharge roller;
A recording apparatus provided between the discharge roller and the recording medium stacker, and a guide surface that guides a recording medium rear end separated from the discharge roller to the recording medium stacker,
A first wall portion that rises upward from the waste liquid tray positioned below the discharge roller on the downstream side of the discharge roller and extends in the width direction of the recording medium, and from the top of the wall portion to the recording medium stacker A guide part that forms the guide surface so as to face is formed integrally with the waste liquid tray ,
The guide surface is formed by a first inclined surface that is inclined obliquely downward from the downstream side of the discharge roller toward the recording medium stacker,
In the recording medium stacker, a support surface that supports the recording medium is formed by a second inclined surface that faces upward in the downstream direction, and from the upstream end of the support surface in the upstream direction. With a third slope facing upwards,
A downstream end portion of the guide surface is located above the third slope, and a second wall portion that descends from the downstream end portion of the guide surface toward the third slope is the guide portion. Provided,
The lower end portion of the second wall portion is located below the upstream end portion of the third slope,
The support surface is positioned below the discharge roller, and its downstream end is positioned below the downstream end of the guide surface.
A recording apparatus.

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