JPH03239549A - Recording device - Google Patents

Abstract

PURPOSE:To prevent recording sheets from being buckled at the time of the discharging and permit the sheets to be discharged in an orderly arrangement by forming a projec tion at a part of a discharge part for receiving the recording sheets extending to the side of a rotary discharge body. CONSTITUTION:When a conveying motor 22 is driven, a roller 8a is rotated to discharge a recording sheet 1 upward in cooperation with a discharge roller 8a and a spur 8b. A discharge stacker 8e is bent into a hook shape having a lower plate 8e1 and a raised plate 8e2 and the lower plate 8e1 is located slightly below the upper end of the discharge roller 8a. The lower end of the discharged recording sheet 1 is supported by the lower plate 8e1 and the back side thereof is supported by the raised plate 8e2, thereby bringing the discharged recording sheet 1 into an erect position. A project ing part 8f is provided at a part of the raised plate 8e2 extending to the side of the discharge roller 8a, located above the discharge roller 8a and formed into a convex shape extending widthwise of the recording sheet. By the formation of the projecting part 8f on the raised plate 8e2, the rear end of the recording sheet 1 is rolled out by the rotation of the discharge roller 8a and ridden thereon and the recording sheet is run off the roller and onto the discharge stacker 8e without being buckled and in an orderly arrangement.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a recording device capable of ejecting a recording sheet without buckling it.

<Prior Art> Today, with the development of information processing systems, various recording devices are used in offices and the like.

As office space has become smaller in recent years, there has been a desire for such recording devices to be smaller and require less installation space.

For this purpose, in the recording apparatus, as shown in FIG. The paper is discharged to a discharge stacker 54.

As mentioned above, the conveyance roller 51, the recording means 52, the discharge section 5
By arranging the recording devices 4 above and below, the installation space for the recording device can be reduced.

<Problems to be Solved by the Invention> However, in the configuration in which the recording sheet 50 is ejected upward as described above, when a long sheet or a weak sheet is conveyed in the sheet conveyance direction, as shown in FIG. The recording sheet 50 buckles when the sheet is ejected, making it difficult for the trailing edge of the sheet to get on the ejection roller 53. Therefore, there are problems such as it becomes difficult to eject the recording sheets 50, or the alignment of the ejected recording sheets 50 deteriorates.

SUMMARY OF THE INVENTION An object of the present invention is to provide a recording apparatus which can solve the above-mentioned conventional problems, prevent buckling of recording sheets during discharge, and discharge recording sheets with good alignment.

Means for Solving the Problems> A typical means according to the present invention for solving the problems described above includes a conveyance means for conveying a recording sheet, and a means for recording an image on the recording sheet conveyed by the conveyance means. a discharge means having a recording means for recording, a discharge rotary body for discharging the recording sheet recorded by the recording means upward, and a discharge section for accommodating the discharged recording sheet. ,
The present invention is characterized in that a part of the discharge portion is configured to protrude toward the discharge rotary body.

Effect> In the above means, since a part of the ejecting portion protrudes toward the ejecting rotor, the recording sheet protrudes toward the ejecting rotor due to the protruding portion. As a result, the recording sheet buckles and becomes curved, so that the rear end of the sheet reliably rides on the ejecting rotary body, and the recording sheet is ejected with good alignment.

<Embodiment> Next, an embodiment of the present invention will be described in which the above means is applied to a serial bubble jet recording method.

FIG. 1 is an overall perspective explanatory view of the recording apparatus, and FIG. 2 is a schematic side view.

(Overall Configuration) First, the overall configuration of the apparatus will be described. A recording sheet 1 serving as a recording medium is conveyed by a sheet conveying means 2. At this time, the recording sheet 1 is pressed against the conveying roller 2a by the sheet pressing member 3, and is configured so as not to lift off from the platen 4.

The driving force of a carriage motor 9 is transmitted to the carriage 5 via a transmission means IO, and the carriage 5 is configured to reciprocate along a guide rail 6. Therefore, when the recording sheet 1 is conveyed, the carriage 5 is moved back and forth, and the recording head 7 is driven to record an image on the recording sheet 1.

The recording sheet 1, on which a predetermined record has been made by the recording means as described above, is discharged upward by the discharge means 8. The discharge means 8 is provided with a protrusion for preventing the recording sheet 1 from buckling.

Next, the configurations of the sheet conveyance means, recording means, and ejection means of the recording apparatus will be explained in detail.

(Sheet conveying means) The sheet conveying means 2 is for conveying the recording sheet 1 to the recording means 7, and in this embodiment, as shown in FIG. F (Au
to-5-sheet-Feeder) 11 or manually fed from the manual feed port 12.

The sheet conveyance means 2 in this embodiment includes conveyance rollers 2a.
is driven to rotate in the direction of the arrow a in FIG. 2, and the recording sheet 1 is conveyed by the front pinch roller 2bt and the rear pinch roller 2bz, which rotate in accordance with this rotation.

The conveyance roller 2a is attached to a plurality of roller shafts 2c which are rotatably supported at both ends by the left and right side walls 13a and 13b of the device frame.

As shown in FIG. 1, a conveyance gear 21L is attached to the roller shaft 2C, and this gear 2d1 meshes with an idler gear 26x, and the idler gear 2dt meshes with a first transmission gear 2dx. Said first transmission gear 2
A second transmission gear 2c+n is attached to the shaft of d, and these are connected to the transport motor 2 by a clutch mechanism (not shown).
It is configured to be selectively connected to e.

Therefore, when the driving force of the conveyance motor 2e is transmitted to the first transmission gear 2ai, the rotational force is transmitted to the conveyance roller shaft 2c via the gear, thereby rotating the conveyance roller 2a.

The pinch rollers 2b+ and 2b2 are attached to press against the surface of the conveyance roller 2a by means of springs (not shown), respectively, and to rotate following the rotation of the conveyance roller 2a. Therefore, the recording sheet 1 is transported by the rotating transport roller 2a and pinch rollers 2b+, 2b.

A conveying force is applied by being nipped with.

Further, below the conveyance roller 2a, as shown in FIG. 2, a paper pan 2f that is curved along the circumferential surface of the conveyance roller 2a is attached. And the paper pan 2
f extends to the manual feed port 12 and is configured to serve as a lower guide for the manually inserted recording sheet) 1.

Further, upper guide plates 2g and 2h are attached above the paper pan 2f at a predetermined interval, and constitute a conveying path for the recording sheet l.

In the above configuration, when the conveyance motor 2e is driven to rotate the conveyance roller 2a in the direction of arrow a in FIG.
The recording sheet l fed from II is placed on the front pinch roller 2b.
, and the conveying roller 2a, and is conveyed in a U-turn along the circumferential surface of the conveying roller 2a, and then is further conveyed by the rear pinch roller 2.
bz and the conveyance roller 2a, and is conveyed to the recording position located above.

On the other hand, the recording sheet 1 fed from the manual feed port 12 is nipped by a conveying roller 2a and a rear pinch roller 2bz, and is conveyed to a recording position.

Here, the recording sheet 1 is automatically fed to the conveying means 2 A.
SFII will be briefly explained.

This is removable from the recording apparatus, and as shown in FIG. 2, the uppermost sheet L of the recording sheet 1 accommodated in the cassette H1a is pressed against the separation roller llc by the pressing spring llb. When the separation roller llc rotates, one of the uppermost layers is separated and fed, and comes into contact with the nip portion between the registration roller lid located downstream thereof and the upper roller lie pressed against it. and the registration roller li
When d rotates in the direction indicated by the arrow in FIG.
ie, and is fed to the sheet conveying means 2.

The driving force transmission configuration to the registration roller lid includes a first
As shown in the figure, a registration gear l1g is attached to a roller shaft 11f to which a registration roller lid is attached, and this registration gear l1g meshes with an idler gear 2dz via an idler gear 11g1.

On the other hand, in the configuration for transmitting the driving force to the separation roller llc, a separation gear llc is attached to the roller shaft 11h to which the separation roller llc is attached.
i is installed, and idler gear oj is attached to this gear lli.
, uk are meshing sequentially. Furthermore, a gear 111 attached to the same shaft as the gear llk meshes with the second transmission gear 2di.

Therefore, when the transport motor 2e is driven and driving force is transmitted through the gear train, the separation roller 11C or the registration roller lid is driven to rotate.

Note that the recording sheet l conveyed by the sheet conveying means 2 is held down by a sheet pressing member 3 so as not to lift off from the platen 4. As shown in FIG. 1, the sheet pressing member 3 is composed of a single plate-like member wider than the movement range of the carriage 5 so as to press the entire radius of the recording sheet 1, and this is supported by a spring or the like (not shown). It is pressed against each conveyance roller 2a by a pressing means.

The tip of the sheet pressing member 3 is located below the recording position by the recording means 7, and the conveyed recording sheet 1 is pressed by the member 3 against the conveying roller 2a. As a result, the recording sheet l at the recording position will not be lifted off the platen 4.

(Recording means) The recording means records an image on the recording sheet l conveyed by the conveyance means 2. The recording means in this embodiment includes a recording pad 7 mounted on a carriage 5, This is configured to be serially scanned and recorded.

The carriage 5 is slidably attached at both ends to a guide rail 6, which serves as a guide member having a circular cross section and is fixed to the left and right side walls 13a and 13b. The carriage 5 is rotatably mounted around the guide rail 6, and as shown in FIG. As a result, the carriage 1 and the recording head 7 mounted on the carriage 1 receive a force in the direction of arrow C in FIG.
a is configured such that it abuts against the sheet pressing member 3.

Thereby, the distance between the recording head 7 mounted on the carriage 5 and the recording sheet 1 is always maintained constant.

Further, as shown in FIG. 1, a driving pulley 10a is attached to one end of the moving range of the carriage 5, a driven pulley 10b is attached to the other end, and the driving pulley 10a is attached to the other end of the moving range of the carriage 5.
A carriage motor 9 is connected to JlOa. An endless timing belt 10c is stretched parallel to the guide rail 6 between the pulleys 10a and 10b, and a portion of the timing belt 10c is connected to the rear part of the carriage 5.

Therefore, the carriage 5 moves back and forth along the guide rail 6 by driving the carriage motor 9 forward and backward.

A recording head 7 is mounted on the carriage 5 and is configured to record an ink image on the recording sheet 1 conveyed by the conveyance means 2.

An inkjet head is a recording head suitably used in this apparatus. The inkjet recording method includes an orifice (liquid ejection opening) for ejecting recording ink liquid as flying droplets, a liquid flow path communicating with the orifice, and a part of this liquid flow path. and ejection energy generating means for applying ejection energy to the ink liquid in the container to form flying droplets. and driving the ejection energy generating means in accordance with the image signal;
An image is recorded by ejecting ink droplets, and as the ejection energy generating means, for example, a method using pressure energy generating means such as an electromechanical transducer such as a piezo element;
A method using an electromagnetic energy generating means that causes the ink liquid to irradiate and absorb electromagnetic waves such as a laser to generate flying droplets;
Alternatively, there is a method using thermal energy generating means such as an electrothermal converter. Among these methods, a method using a thermal energy generating means such as an electrothermal converter is preferable because it allows the orifices to be arranged in high density and the recording head can be made compact.

In this embodiment, a bubble jet recording method, which is one of the above-mentioned ink jet recording methods, is used as a recording means.

FIG. 5 is an explanatory diagram of the configuration of the recording head 7 constituting the recording means, and FIGS. 6(a) to (2) are explanatory diagrams of the principle of bubble jet recording.

In FIG. 5, 7a is a heater board, in which an electrothermal converter (discharger) 7b and an electrode 7c made of argonium or the like for supplying power to this are disposed on a silicon substrate. It is set up. A top plate 7e having a partition wall for partitioning a liquid path (nozzle) 7d for recording liquid is adhered to the heater board 7a. Further, as shown in FIG. 1, the recording head 7 is located on the left side of the device.
An ink cartridge 7f for supplying ink to is replaceably attached.

The ink supplied from the ink cartridge 7f through a conduit (not shown) is filled into the common liquid chamber 7g in the recording head 7 through a supply lower e provided on the top plate 7e, and from this common liquid chamber 7g is supplied to each nozzle. 7d. Ink ejection ports (orifices) 7dl are formed in these nozzles 7d, and the orifices 7d1 face the recording sheet l of the recording head 7 at a predetermined pitch in the sheet conveyance direction (vertical direction in FIG. 1). It is formed of.

Here, the principle of ink flying in the bubble jet recording method will be explained with reference to FIGS. 6(a) to 6(middle). 4. In a steady state, as shown in FIG. The surface tension and external pressure of the ink 14 are balanced on the orifice surface. To make the ink 14 fly in this state, the electrothermal converter 7b in the nozzle 7d is energized to cause the ink in the nozzle 7d to rapidly rise in temperature beyond nucleate boiling.

Then, as shown in FIGS. 6 and 7, the ink adjacent to the electrothermal converter 7b is heated to generate microbubbles, and the ink in the heated portion is vaporized to cause film boiling, and as shown in FIG. As shown in (C), the bubbles 15 grow rapidly.

When the bubble 15 grows to its maximum size as shown in FIG. 6(d), an ink droplet is forced out from the orifice surface in the nozzle 7d. When the electricity supply to the electrothermal converter 7b is finished, the grown bubble 15 is cooled by the ink 14 in the nozzle 7d and contracts, as shown in FIG. 8(e). The growth and contraction of this bubble causes the Iraqi droplet to fly out from the orifice. Furthermore, as shown in FIG.
disappears or shrinks to an almost negligible volume. When the bubble 15 contracts, ink is supplied from the common liquid chamber 7g into the nozzle 7d by capillary action, as shown in FIG. 6(8), in preparation for the next energization.

Therefore, an ink image is recorded on the recording sheet 1 by energizing the electrothermal transducer 7b in synchronization with the movement of the carriage 5 in accordance with the image signal.

Incidentally, as shown in FIG. 1, a camping means 16 is provided at the left end of the movement range of the carriage 5. The capping means 16 has the function of preventing the ink near the orifice surface of the recording head 7 from drying and solidifying thereby by covering the ink ejection surface of the recording head 7 during non-recording times.

In addition, a pump (not shown) is connected to the capping means 16, and the pump is driven to prevent ink from being ejected incorrectly or to be removed, and the ink can be suctioned from the orifice surface by its suction force to perform a recovery process. It has become.

(Discharging means) The discharging means 8 is a recording sheet recorded by the recording means 7)1
The recording sheet 1 is discharged upward by a discharge rotary body, and the sheet 1 is stored in a discharge section.

In this embodiment, as shown in FIGS. 1 and 2, the recording sheet 1 is ejected by a discharge roller 8a serving as a discharge rotating body and a spur 8b in contact with the discharge roller 8a. A discharge gear 8d is attached to the end of the shaft 8C, and this discharge gear 8d meshes with the idler gear 2di.

Therefore, when the conveyance motor 2e is driven, its driving force is transmitted to the discharge roller 8a, which rotates, and the recording sheet 1 is discharged upward by the cooperative action of the discharge roller 8a and the spur 8b. .

Further, the discharge stacker 8e serving as the discharge section is connected to the discharge roller 8.
It is provided on the back part of the rotation direction side of a.

This discharge stacker 8e is constructed by a lower plate 8e+ and an upright plate 8et bent into a hook shape. and the lower plate 81
+ is located slightly below the upper end of the discharge roller 8a, the lower end of the discharged recording sheet 1 is supported by the lower plate 8e, the back surface of the sheet is supported by the upright plate 8, and the recording sheet 1 is discharged. The recording sheet 1 is configured to stand up.

As shown in FIG. 2, a tray 8e is attached to the upper end of the upright plate 8 so as to be rotatable about a shaft 8ea. When setting the recording sheet 1 on the ASFII, this tray can be easily set by tilting it in the direction of arrow d in FIG.

Furthermore, as shown in FIGS. 1 and 2, a protrusion 81 is formed on a portion of the upright plate 8el, protruding toward the discharge roller 8a (with a protrusion amount of 1+). The protruding portion 8f is located above the discharge roller 8a and is formed as a protruding strip extending across the width of the recording sheet 1.

If the protrusion 8f is formed on the upright plate 8el as described above, the recording sheet 1 discharged by the rotation of the discharge roller 8a will have its lower side aligned with the protrusion 8 as shown in FIG.
The discharge roller 8a is pushed out by r. As a result, the rear end of the recording sheet 1 rides on the discharge roller 8a and is discharged to the discharge stacker 8e with good alignment without buckling.

Here, the protrusion amount t for preventing the buckling is 2~
About 10 m is preferable.

[Other Examples]

Next, another embodiment of the present invention will be described.

(Sheet Conveying Means) In the embodiment described above, the conveying force is applied to the recording sheet 1 by the driven conveying roller 2a and the pinch rollers 2b+, 2k1g. For example, a rotary belt configured to be rotatable as an endless belt may be used to apply conveying force to the recording sheet l.

(Recording means) The configuration of the recording means includes the above-mentioned ejection port and liquid path.

In addition to the combination of electrothermal converters, US Pat.
What is disclosed in Japanese Patent Application Laid-Open No. 59-123670 and the like can also be adopted.

Further, the above-mentioned recording means is an example in which ink is supplied to the recording head from the ink cartridge 7f installed in the recording apparatus, but an ink storage chamber is provided in the recording head, and the ink in the ink storage chamber runs out. In such a case, a disposable type recording head that can be replaced may be used.

Furthermore, although the above-described embodiments have exemplified a serial type recording system, the present invention is not limited to the serial type, and can also be applied to a line type recording system.

Here, a line-type bubble jet recording method capable of full-color recording will be briefly explained.

In FIG. 7, the recording sheet 1 is conveyed by an upstream conveyance roller 17a which is driven and rotated, pinch rollers 17b and 17c which are in pressure contact with this and driven to rotate, and a downstream conveyance roller 18a which is driven and rotated and which are in pressure contact with this. It is configured to be able to be conveyed in the direction of arrow X by a pinch roller 18b that rotates as a result of rotation.

The above-mentioned upstream/downstream conveyance roller 1? Between a and 18a, there are four recording sheets 19a and 1, facing the recording sheets 19a and 18a.
9b, 19c, and 19d are arranged in order from the upstream side to the downstream side in the sheet conveyance direction. This recording head 19
A to 19d are line-type bubble jet recording heads capable of recording over the entire width of the recording sheet 1, and each of the recording heads 19a to 19d is configured to be supplied with ink from an ink cartridge (not shown). . The recording head 19a is filled with black ink, and the recording head 1 is filled with black ink.
Yellow ink is supplied to the recording head 9b, magenta ink is supplied to the recording head 19c, and cyan ink is supplied to the recording head 19d. Each of the recording heads 19a to 19d is driven based on a color signal corresponding to the supplied ink color, and the nozzles are driven. The ink droplet is ejected from the ink droplet.

Therefore, while conveying the recording sheet 1 in the direction of arrow X,
By driving each of the recording heads 19a to 19d in synchronization with the conveyance, full color recording can be performed on the recording sheet l.

In FIG. 7, when there are nozzles below the recording head 19a that are not recording or are not in use, the ink discharge is restored by removing thickened ink or stuck ink from the ink discharge ports. A recovery system 20 is provided for processing.

This recovery system 20 uses the recording sheet 1 when performing recovery processing.
Alternatively, the nozzles of each of the recording heads 19a to 19d can be opposed to each other. Note that the recording heads 19a~
19d performs preheating at an appropriate timing, so the number of activations of the ejection recovery process is reduced.

Furthermore, the recording means of the present invention need not be limited to the bubble jet recording method described above. For example, there is a so-called thermal transfer recording method in which an ink sheet coated with heat-melting ink is heated in accordance with an image signal and the molten ink is transferred to the recording sheet 1, and a so-called thermal transfer recording method in which the recording sheet 1, which develops color by heat, is heated in accordance with the image signal. Various recording methods can be employed, such as a thermal recording method and a so-called wire tod recording method in which recording is performed by hitting an ink ribbon with a wire according to an image signal.

Therefore, the recording head is not limited to the above-mentioned bubble jet head, and for example, a thermal head, a wire dot head, a daisy-wheel head, etc. can be used.

The recording device can be used as an image output terminal for information processing equipment such as a computer, as a copying device combined with a reader, etc., and as a transmitter/receiver 88! It is also possible to apply the present invention to facsimile machines and the like.

<Effects of the Invention> As described above, in the present invention, in the above means, since a part of the ejecting section protrudes toward the ejecting rotor, the recording sheet protrudes toward the ejecting rotor by the protruding portion. . As a result, the recording sheet is less likely to buckle, so that the rear end of the sheet reliably rides on the discharge rotary body, and the recording sheet is discharged with good alignment.

Further, as mentioned above, since no special parts are required to prevent buckling of the recording sheet, there is an advantage that manufacturing costs do not need to be increased.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of a serial bubble jet recording device according to an embodiment of the present invention, FIG. 2 is a side cross-sectional view, and FIG. 3 is a state in which the carriage is urged toward the sheet pressing member. FIG. 4 is an explanatory diagram of the structure of the recording head, FIGS. 5(a) to (g) are explanatory diagrams of the principle of bubble jet recording, FIG. The figure is an explanatory diagram of the configuration of line type bubble jet recording, No. 8
9 and 9 are explanatory diagrams of the prior art. 1 is a recording sheet, 2 is a sheet conveyance means, 2a is a conveyance roller, 2 b+, 2 bz are pinch rollers, 2C is a roller shaft, 2d+ is a conveyance gear, 2dz is an idler gear, 2
ds is the first transmission gear, 2 (L is the second transmission gear, 2e is the transport motor, 2f is the paper pan, 2g, 2h are the upper guide plates, 3 is the sheet pressing member, 4 is the platen, 5 is the carriage, 5a is Contact portion, 6 is a guide rail, 7 is a recording head, 7a is a heater board, 7b is an electrothermal converter, 7C
is the electrode, 7d is the nozzle, 7d+ is the orifice, 7e is the top plate, 7e is the supply port, 7f is the ink cartridge 7, 7g
is a common liquid chamber, 8 is a discharge means, 8a is a discharge roller, 8b is a spur, 8C is a roller shaft, 8d is a discharge gear, 8e is a discharge stacker, 8e is a lower plate, 8mu is an upright plate, 8e+ is a tray, 8e4 is the shaft, 8f is the protruding part, 9 is the carriage motor, lO is the transmission means, 10a is the drive pulley, 10b is the driven pulley, loc is the tie ξ ring belt, 11 is ASF, l
la is the cassette, llb is the pressure spring, Ilc is the separation roller, lid is the registration roller, lie is the upper roller, llf is the roller shaft, l1g, l1g, 11h, 1
111 is the gear, 12 is the manual feed port, 13a is the left side wall of the frame, 13b is the right side wall of the frame,
14 is ink, 15 is air bubbles, 16 is capping means,
17a is an upstream conveyance roller, 17b and 17c are pinch rollers, 18a is a downstream conveyance roller, 18b is a pinch roller, 19a to 19d are recording heads, and 20 is a recovery means. Figure 3

Claims (4)

[Claims] (1) A conveyance means for conveying a recording sheet, a recording means for recording an image on the recording sheet conveyed by the conveyance means, and a recording means for discharging the recording sheet recorded by the recording means upward. A recording device comprising: a discharging rotary body; and a discharging means having a discharging section for accommodating the discharged recording sheet, and a part of the discharging section protrudes toward the discharging rotary body side. Device. (2) The recording apparatus according to claim 1, wherein the recording apparatus is an inkjet recording system in which the recording means performs recording by ejecting ink in response to a signal. (3) The recording apparatus according to claim 2, wherein the recording apparatus is an inkjet recording system in which the recording means uses thermal energy to eject ink to perform recording. (4) In the recording device, the recording means energizes the electrothermal transducer in response to a signal, and the ink is ejected from the ejection port by the growth of bubbles generated by heating exceeding film boiling by the electrothermal transducer, thereby recording. 4. The recording apparatus according to claim 3, which is a bubble jet recording method.