JPH09104559A - Recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent trouble of a jam or the like caused by curling of a sheet loaded to be held after recording, by providing a regulating means which regulates curling of the sheet loaded in a loading means. SOLUTION: Recording paper P, loaded in a sheet cassette 1 of a feed unit C, is picked up sheet by sheet from the uppermost by a feed roller 2 and a separating pawl 3, to be fed to a recording unit B along a sheet guide 7 by conveying rollers 4 and 5, 6. In the recording unit B, the recording paper P is conveyed through a recording head 8 by a conveying roller 9, press roller 10, discharge roller 11 and a rhythm roller 12, an image is recorded by a recording head 5. The recording paper P is guided to a lower guide 13 and discharged onto a sheet stacker 16 as a loading means by a discharge roller 14 and a rhythm roller 15 brought into press contact with this discharge roller, the paper P is successively loaded to be held. Here, a rib member 18 regulating curling of the recording paper, loaded on the sheet stacker 16, is arranged in an opposed position in an upper surface of the sheet stacker 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device used in a copying machine, a printer, a facsimile machine, etc.,
In particular, the present invention relates to an inkjet type recording apparatus that forms an image by ejecting ink on a sheet in response to a signal.

[0002]

2. Description of the Related Art A recording apparatus installed in a conventional facsimile apparatus will be described with reference to FIG. As shown in FIG. 9, a plurality of recording papers P are stored in a cassette 51 in a stacked manner, fed one by one by a feeding roller 52, and further conveyed to a recording unit B by a conveying roller 53. The recording unit B employs an inkjet recording method, and an image is recorded on the upper surface of the recording paper P in the drawing by ejecting ink according to a signal.

Various recording methods for recording on recording paper have been proposed. Among them, the above-mentioned ink jet recording method is one in which ink is directly ejected from the recording head onto the recording paper, and the running cost is low. However, it is attracting attention as a recording method that has advantages such as low cost and quiet recording operation.

A recording paper P on which an image is recorded as described above.
Are conveyed to the ejecting section by the first ejecting roller pair 54 arranged near the downstream side of the recording section B, ejected onto the stacker 56 by the second ejecting roller pair 55, and sequentially stacked and held.

In the conventional facsimile apparatus as shown in FIG. 9, a stacker 56 for stacking and holding recording sheets on which recording has been performed is arranged inside the main body of the apparatus, so that the stacker (or tray) is external to the apparatus. The entire device is more compact than other fax machines installed in
There is an advantage that the installation area is small.

[0006]

However, in the above-mentioned prior art, the recording paper P recorded by the ink jet method is swollen by the moisture contained in the ink immediately after the recording is performed. In a special environment (e.g., an extremely low humidity environment), curls occur when the paper is discharged onto the stacker 56 and then dried rapidly, causing curls to roll up on the stacker 56 or the edges to rise. There was a possibility of becoming. As a result, the recording paper curled on the stacker 56 is pushed out by the next recording paper discharged by the second discharge roller pair 55 and falls from the stacker 56, or the next recording paper itself is caught. There were cases where problems such as jamming occurred.

The present invention has been made in view of the above problems, and an object thereof is to prevent problems such as jams caused by curling of sheets stacked and held after recording.

[0008]

A typical constitution of the present invention for achieving the above object is a recording means for forming an image on a sheet, a conveying means for conveying the sheet to the recording means, and a recording means. Ejection means for ejecting the subsequent sheet,
The present invention is characterized by comprising stacking means for stacking and holding the sheets discharged by the discharging means, and regulating means for regulating curl of the sheets stacked on the stacking means.

According to the above construction, even when the sheets stacked and held on the stacking means are curled and rolled into a roll shape or the end portions are lifted, the regulating means causes Since curling of the sheet is regulated, it is possible to prevent problems such as the sheet being pushed out by the sheet to be discharged next and falling from the stacking means, or the next sheet itself being caught and jammed. It will be possible.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] An embodiment of a recording apparatus according to the present invention to which the above means is applied will be described below with reference to the drawings. It should be noted that this embodiment will be described by using an inkjet recording apparatus equipped in a facsimile apparatus. FIG.
Is a cross-sectional view showing a schematic configuration of a facsimile apparatus to which the present invention is applied, FIG. 2 is a perspective view showing a schematic configuration of a recording unit, FIG. 3 is a block diagram showing a configuration of a control system of the facsimile apparatus, and FIG. 7 is a flowchart showing a sequence for detecting a sheet jam.

First, a schematic structure of a facsimile apparatus will be described with reference to FIG. In FIG. 1, A is a reading unit that optically reads an image of a document, B is an inkjet recording unit that discharges ink to a sheet such as recording paper in accordance with a signal to record an image, and C is a sheet cassette and this. It is a feeding unit that separates sheets such as recording sheets stacked on the sheet and supplies them to the recording unit B.

First, the flow of the recording paper P as a sheet will be described. The sheet conveying path is as indicated by an arrow G in FIG. That is, the recording papers P stacked on the sheet cassette 1 of the feeding unit C are picked up one by one from the uppermost one by the feeding roller 2 and the separating claw 3, and the feeding roller 4 and the feeding rollers 5, 6 as a feeding means. Is fed to the recording unit B along the sheet guide 7. In the recording unit B, the recording head 8 as recording means
Transport roller 9, pressing roller 10 and discharge roller 11
The recording paper P is conveyed by the spur 12 and an image is recorded by the recording head 5. The recording paper P on which an image has been recorded is guided by the lower guide 13 and discharged onto a sheet stacker 16 as a stacking means by a discharge roller 14 as a discharge means and a spur 15 which is pressed against the discharge roller 14 and sequentially stacked and held.

A photo sensor 17 as a density detecting means is arranged on the shaft of the discharge roller 14, and the photo sensor 17 causes no ink in the recording head 8 and a sheet jam (paper jam) in the sheet conveying path. ) Is configured to detect.

Further, at a position facing the upper surface of the sheet stacker 16 (a lower portion of the reading unit A in the present embodiment), as a regulation means for regulating the curl of the recording paper stacked on the sheet stacker 16 after recording. A rib member 18 is arranged. Therefore, when the edge of the recording paper P on the sheet stacker 16 is gradually lifted by the curl due to the drying of the ink, the recording paper P comes into contact with the rib member 18 and is regulated, and further curl is prevented. It has become so.
As a result, it is possible to prevent the recording paper on the sheet stacker 16 from being pushed out by the recording paper to be ejected next and falling from the stacker 16 or the next recording paper being caught and jammed. .

Next, a specific structure of the recording section of the recording unit B will be described with reference to FIG. In the present embodiment, an ink jet system is used as a recording means for recording an image by ejecting ink on a sheet according to a signal.

As shown in FIG. 2, the recording head 8 of the present embodiment has a built-in ink tank, and a cartridge type ink jet recording head which can be replaced with a new recording head when the ink is exhausted is detachably attached to the carriage 19. It is installed in. The carriage 19 reciprocates in the direction (main scanning direction) orthogonal to the conveyance direction (sub-scanning direction) of the recording paper P while holding the recording head 8 with high precision. It is held slidably. Further, the carriage 19 has a butting portion 19a driven by a motor (not shown) such as a motor pulley and a pulley 21.
It is connected to a part of the timing belt 22 which is stretched around, and is configured to reciprocate in the main scanning direction by the drive of the motor. At this time, the recording signal and power supplied to the recording head 8 are supplied from the electric circuit of the apparatus main body by the flexible cable 23.

Further, reference numeral 24 is a cap which functions as an ink receiving means, which is installed corresponding to a position (home position) where the carriage 19 is on standby, and is adapted to move up and down as necessary. Is in close contact with the recording head 8 and covers the nozzle portion to prevent evaporation of ink and adhesion of dust.

In this embodiment, in order to position the recording head 8 and the cap 24 so as to be relatively opposed to each other, a carriage home sensor 25 provided in the apparatus main body and a light shielding provided in the carriage 19 are provided. A plate 19b is used. A transparent photo interrupter is used for the carriage home sensor 25, and when the carriage 19 moves to the standby position, the light emitted from a part of the carriage home sensor 25 is blocked by the light blocking plate 19b. Then, it is detected that the recording head 8 and the cap 24 are relatively opposed to each other.

In FIG. 2, the recording paper P is fed upward from the lower side in the drawing, bent horizontally by the feeding roller 4 and the sheet guide 7, and fed in the direction of arrow H (sub-scanning direction). . Further, the conveying roller 4 and the discharging roller 14 in the figure are driven by driving systems (not shown),
If necessary, the recording paper P is conveyed in the sub scanning direction with high accuracy in conjunction with the reciprocating movement of the carriage 19. The discharge roller 14 is made of a material having a high friction coefficient such as rubber. The spur 15 facing the discharge roller 14 is made of a highly water-repellent plastic material or the like and has a blade-shaped circumferential portion, and only this blade-shaped circumferential portion contacts the paper surface of the recording paper P. It is supposed to do. Further, the spurs 15 are disposed at a plurality of positions facing the discharge roller 14 at predetermined positions in the main scanning direction by a bearing member (not shown), and contact the unfixed image on the recording paper immediately after recording. Is also configured to guide and convey the recording paper P without affecting the image.

The photo sensor 17 is a reflection type photo interrupter which is arranged on the shaft of the discharge roller 14 and optically detects the presence or absence of a black mark recorded on the recording paper P. The absence or the sheet jam can be determined from the output of the black mark and the white output of the recording paper P. The photo sensor 17 used in this embodiment uses a red LED as a light emitting element and a phototransistor as a light receiving element, and can determine whether the range of about 3 mm in diameter is white or black. Further, the discharge roller 14 has a facing portion of the photo sensor 17 made of black rubber or the like so that black output is performed when there is no recording paper P.

Next, the structure of the main part of the electric circuit of the facsimile apparatus of this embodiment will be described with reference to FIG. In FIG. 3, reference numeral 31 is a control unit for controlling the entire recording apparatus, which includes a CPU 32 such as a microprocessor, and the CPU 32.
ROM3 that stores various control programs and various data
3 and a RAM 34 used as a work area of the CPU 32 for temporarily storing various data.

A photo sensor 17 for detecting the presence or absence of a black mark recorded on the recording paper P is connected to the control unit 31 via a detection circuit 35 and a comparator 36. Further, each roller such as the feeding roller 2, the conveying roller 4, and the discharging roller 14 that conveys the recording paper P is a sheet feeding drive means 37.
Are connected via Further, the recording head 8 and the carriage 19 are connected via a head drive circuit 38 and a carriage drive means 39, respectively.

The image data read by the reading unit A and the image data 40 including the image data sent from another device are input to the control unit 31 via the image data input circuit 41. Further, an image memory 42 is connected to the control unit 31 so that the image data can be stored or read out. Further, as shown in the figure, the control unit 31 includes a carriage home sensor 25 and an alarm circuit 43.
Are also connected.

Next, the sequence of the ink out detection and the sheet jam detection of the recording apparatus in this embodiment will be described with reference to FIG.
This will be described with reference to FIG. First, after the recording paper P is picked up and the image data is recorded (step S1), the recording paper P is
A black mark is recorded at the trailing edge of the trailing edge (step S2). The black mark is recorded by a simple solid black dot matrix, and is recorded by providing a blank area between the trailing edge of the recording paper and a white output. The recording paper P is conveyed until the black mark reaches the position of the photo sensor 17 provided on the shaft of the discharge roller 14, which is the last portion of the sheet conveyance path (step S3). Then, the output of the photo sensor 17 at this time is stored in the RAM 34 of the control unit 31 via the detection circuit 35 (step S4). Next, the recording paper P is conveyed to the blank portion between the black mark and the trailing edge of the recording paper (step S5), and the output (white or black) of the photo sensor 17 at this portion is stored in the RAM 34 again (step S6). Further, the recording paper P is conveyed until it is stacked on the sheet stacker 16, the black surface of the discharge roller 14 is read by the photo sensor 17, and the output is stored in the RAM 34 (step S7). Thereafter, referring to the data in the RAM 34 in step S8, if the data is in the order of black and white, it is found that the recording is normally completed, so the process proceeds to step S9, and if the next page is present thereafter. The process proceeds to step S1, the pickup of the next recording sheet is started, and the same operation as described above is repeated.

If the data in the RAM 34 is in an order other than black and white in step S8, the process proceeds to step S10. If the data is in white and black, the black mark is recorded because the ink has run out. If it is determined that the recording sheet P is not able to be conveyed, it is notified that there is no ink (step S11). Otherwise, it is determined that the recording sheet P is not conveyed normally for some reason and is jammed or stayed, and the sheet conveyance path is rechecked. As described above (step S12).

Although the series of recording operations is completed as described above, since the photo sensor 17 is provided at the end of the sheet conveying path on the axis of the discharge roller 14 as described above, the upstream side (that is, the sheet conveying path). It is possible to detect the conveyance abnormality of the whole). Therefore, the single function of the photo sensor 17 can realize the two functions of the ink out detection and the sheet jam detection.

Next, details of the structure of the stacker portion will be described with reference to FIG. FIG. 6 shows the sheet stacker.
It is the schematic which looked at 16 parts from the exit side front (arrow W direction of FIG. 1). The recording paper P is flat immediately after being discharged to the sheet stacker 16, but in a special environment (extremely low humidity environment), curls gradually occur as the ink dries, and the edges are lifted. At this time, in the case of the conventional device, the curl progresses, and the recording paper P is almost curled as shown in FIG.
The trailing edge of the recording paper ejected next may be pushed out and fall from the top of the stacker 56, or the next recording paper itself may be caught inside the apparatus and become a sheet jam.

In the present invention, in order to prevent this, a rib member 18 is disposed above the sheet stacker 16 as a regulation means for regulating the curl of the recording paper P, and when the end portion of the recording paper P is lifted up. The end portion of the recording paper P is brought into contact with the rib member 18 to be regulated, and further curling is prevented. At this time, the contact force between the two is very weak, so that the recording paper to be ejected next can easily enter between the recording paper P on the sheet stacker 16 and the rib member 18. Therefore, even if the recording paper P is curled on the sheet stacker 16 as described above, the curling of the recording paper P is restricted by the rib member 18, so that the recording paper P is pushed out by the next recording paper. ,
It is possible to prevent the next recording sheet from being caught and causing a jam. Further, since the rib members 18 are only arranged near the left and right ends in the width direction of the recording paper P, the workability of taking out the recording paper P is not deteriorated due to the narrowed opening.

The recording head 8 used in this embodiment is
Inkjet recording head with 360D resolution
The PI has 64 nozzles, and ejects ink from the ejection port at the tip of the nozzle by the pressure of film boiling generated in the ink by the heat generation of the electrothermal conversion element provided in the nozzle.

Next, the ejection principle of the recording head used in the ink jet recording apparatus of this embodiment as the recording means in the present invention will be described. A recording head unit applied to an inkjet recording apparatus generally includes a fine liquid ejection port (orifice), a liquid passage, and an energy acting unit provided in a part of the liquid passage, and a liquid drop acting on the liquid in the acting unit. It is equipped with an energy generating means for generating molding energy and is replaceable.

As the energy generating means for generating such energy, an electromechanical converter such as a piezo element is used, and an electromagnetic wave such as a laser is radiated so that the liquid in the liquid absorbs it to generate heat. There is a method in which the liquid droplets are ejected and ejected by the action of, or a method in which the liquid is ejected by heating the liquid by an electrothermal converter. Among them, in a recording head portion used in an inkjet recording method for ejecting a liquid by thermal energy, liquid ejection ports (orifices) for ejecting recording liquid droplets to form flying liquid droplets are arranged at high density. Therefore, it is possible to record with high resolution.

Further, the recording head portion using the electrothermal converter as the energy generating means can be easily made compact as a recording head portion, and the technological progress and the reliability improvement in the recent semiconductor field are remarkable. The advantages of IC technology and micro processing technology can be fully utilized, and it is easy to increase the length and planarization (dualization). With high productivity,
It is possible to provide an inkjet recording head unit that is inexpensive to manufacture.

The ink jet recording head section manufactured through the semiconductor manufacturing process using the electrothermal converter as the energy generating means is generally provided with a liquid passage corresponding to each ink ejection port, and each liquid passage is provided. Is provided with an electrothermal converter as a means for applying thermal energy to the liquid filling the liquid passage to eject the liquid from the corresponding ink ejection port to form flying droplets. The liquid is supplied from a common liquid chamber that communicates with each liquid passage. Regarding the method of manufacturing the ink ejection unit, the applicant has a solid layer for forming at least a liquid channel on the first substrate, and an active energy ray curable material layer used for forming at least a wall of the liquid channel, After sequentially stacking the second substrate, a mask is stacked on the second substrate, and active energy rays are irradiated from above the mask to form at least the wall of the liquid channel of the active energy ray-curable material layer. Cure as part,
Further, a patent application has been filed for a method of removing the uncured portions of the solid layer and the active energy ray-curable material layer from the two substrates to form at least a liquid channel (see JP-A-62-253457).

The present invention is particularly effective in an ink jet recording apparatus for recording by forming flying droplets by utilizing thermal energy among ink jet recording systems.

With regard to its typical structure and principle, it is preferable to use the basic principle disclosed in, for example, US Pat. Nos. 4,723,129 and 4740796. This method can be applied to both the so-called on-demand type and the continuous type. In particular, in the case of the on-demand type, it is arranged corresponding to a sheet or a liquid path holding a liquid (ink). By applying at least one drive signal corresponding to the recorded information and providing a rapid temperature rise above nucleate boiling to
This is effective because heat energy is generated in the electrothermal converter to cause film boiling on the heat acting surface of the recording head, and as a result bubbles in the liquid can be formed in a one-to-one correspondence with this drive signal. The liquid is ejected through the ejection opening by the growth and contraction of the bubble to form at least one droplet. When the drive signal is formed into a pulse shape, the growth and shrinkage of the bubbles are performed immediately and appropriately, so that particularly excellent liquid ejection can be achieved, which is more preferable.

As the pulse-shaped driving signal, those described in US Pat. Nos. 4,463,359 and 4,345,262 are suitable. If the conditions described in US Pat. No. 4,313,124, which is an invention relating to the rate of temperature rise on the heat acting surface, are adopted, more excellent recording can be performed.

As the constitution of the recording head, in addition to the combination constitution of the ejection port, the liquid passage, and the electrothermal converter (the linear liquid passage or the right-angled liquid passage) as disclosed in the above-mentioned respective specifications. A configuration using US Pat. Nos. 4,558,333 and 4,459,600, which disclose a configuration in which the heat acting portion is arranged in the bending region, may be used.

In addition, JP-A-59-123670 discloses a structure in which a common slit is used as a discharge portion of the electrothermal converter for a plurality of electrothermal converters, and a pressure wave of thermal energy is absorbed. The effect of the present invention is effective even if the configuration based on Japanese Patent Application Laid-Open No. 59-138461, which discloses a configuration in which the opening corresponds to the ejection portion. That is, according to the present invention, recording can be reliably and efficiently performed regardless of the form of the recording head.

Further, the present invention can be effectively applied to a full line type recording head having a length corresponding to the maximum width of a recording medium which can be recorded by the recording apparatus. Such a recording head may have a configuration that satisfies the length by combining a plurality of recording heads, or a configuration as a single recording head that is integrally formed.

In addition, by being attached to the apparatus main body, it can be electrically connected to the apparatus main body and ink can be supplied from the apparatus main body by a replaceable chip type recording head or the recording head itself. A cartridge-type recording head provided with an ink tank may be used.

Further, it is preferable to add a recovery means for the recording head, a preliminary auxiliary means, etc., which are provided as a constituent of the recording apparatus of the present invention, because the effects of the present invention can be further stabilized. Specific examples thereof are capping means, cleaning means, pressurizing or suctioning means for the recording head, electrothermal converter or a heating element other than this, or preheating means by a combination thereof, and recording. It is also effective to perform a stable recording by performing a preliminary discharge mode in which another discharge is performed.

Further, the recording mode of the recording apparatus is not limited to the recording mode of only the mainstream color such as black, but the recording head may be integrally formed or a plurality of combinations may be used. It is also possible to use an apparatus provided with at least one of full-color by color mixing or color mixing.

In the embodiments described above, the ink is described as a liquid, but an ink that solidifies at room temperature or below and that softens at room temperature, or that is a liquid, etc., gives a recording signal for use. Sometimes the ink may be liquid.

In addition, the temperature rise due to the thermal energy is positively prevented by using it as the energy for changing the state of the ink from the solid state to the liquid state, or the ink is solidified in a standing state for the purpose of preventing evaporation of the ink. In some cases, whether ink is used, the ink is liquefied by applying thermal energy according to the recording signal and is ejected as a liquid ink, or the one that has already started to solidify when it reaches the recording sheet. The use of an ink having a property of being liquefied only by heat energy is also applicable to the present invention. The ink in such a case is, as described in JP-A-54-56847 or JP-A-60-71260, in a state of being held as a liquid or a solid in the concave portion or through hole of the porous sheet. Alternatively, it may be configured to face the electrothermal converter. In the present invention, the most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

[Other Embodiments] In the above-described embodiment,
Although the rib member 18 arranged on the upper part of the sheet stacker 16 is used as the regulation means for regulating the curl of the sheets stacked on the stacking means, the present invention is not limited to this.

For example, as shown in FIG. 7, the rib member
The seat contact portion 18a of 18 may be provided with a rotatable spur 26. Incidentally, this spur 26 is made of a highly water-repellent material and has a blade-shaped circumferential portion in the same manner as the spur 15 described in the above-mentioned embodiment, and only this blade-shaped circumferential portion is provided. Touches the surface of the recording paper P. Further, as the spur 26, a thin plate material that is usually used and punched out in a star shape may be used. According to this configuration,
Since the frictional resistance with the recording paper is reduced, the possibility of being caught and jammed can be further reduced. Further, since the spur is used, even if the image on the recording paper P is an unfixed image (undried ink), the image on the recording paper P is rubbed and disturbed, and the image is adversely affected. There is no such thing.

Further, as shown in FIG. 8, as the regulating means, a weight member 27, which is movable in the vertical direction and holds the sheets at a position facing the upper portion of the sheet stacker 16, may be provided. The weight member 27 is a pin 28 on the sheet discharge side.
It is a weight member in the form of a metal plate that is rotatably suspended around the center of the recording paper, and thereby presses the recording paper from above to prevent curling. In this case, the sheet stacker
Even if a large amount of recording paper is discharged onto the sheet 16, the weight member 27 can be retracted upward, which has the advantage of increasing the number of sheets that can be stacked.

Further, although not shown, the weight member 27
The above-mentioned spur 26 may be attached to the tip which is the seat contact portion. Also with this configuration, since the frictional resistance with the recording paper is reduced as described above, the possibility of being caught and jammed can be further reduced.
Further, since the spur is used, even if the image on the recording paper P is an unfixed image (undried ink), the image on the recording paper P is rubbed and disturbed, and the image is adversely affected. There is no such thing.

Further, a drive motor (not shown) is connected to the center of rotation of the weight member 27 as the regulating means, and is moved to a position where the recording paper is pressed for a fixed time after the recording is completed. The weight member 27 may be retracted to the upper part. With this configuration, the weight member 27 as the restricting means does not get in the way when the recording paper is taken out, and the operability is improved.

[0050]

As described above, according to the present invention,
Even when the sheets stacked on the stacking means are curled, the curling of the sheets is restricted by the restricting means arranged at the position facing the upper part of the stacking means.
It is possible to prevent the sheet from being pushed out by the next sheet to be discharged and falling from the stacking means, or the next sheet from being caught and causing a jam,
The reliability of the device is improved. The present invention is particularly effective because the recording device of a facsimile machine is likely to be operated unattended.

Further, specifically, by using the rib member as the regulating means, the above-mentioned effects can be realized at low cost.

Furthermore, by attaching a rotatable spur member to the sheet contact portion of the rib member, the frictional resistance with the recording paper is reduced, so that the possibility of being caught and jammed can be reduced. Further, since the spur is used, even if the image on the sheet is an unfixed image, the image is not adversely affected.

Further, the same effect as the above-mentioned effect can be obtained by using a weight member for pressing the sheet, which is movable in the vertical direction, as the regulating means. Further, in the case of this configuration, even if a large number of sheets are stacked on the stacking means, the weight member can be retracted upward, which has the advantage of increasing the number of stackable sheets.

Further, by attaching a rotatable spur member to the sheet contact portion of the weight member, the frictional resistance with the recording paper is reduced as described above, so that the possibility of being caught and jammed can be further reduced. it can. Further, since the spur is used, even if the image on the sheet is an unfixed image, the image is not adversely affected.

Further, by providing the driving means for moving the regulating means in the upward direction for pressing the sheet, the regulating means can be retracted except immediately after recording, so that the sheet is taken out. The operability of will not be impaired.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a schematic configuration of a facsimile apparatus to which the present invention is applied.

FIG. 2 is a perspective view showing a schematic configuration of a recording unit in the facsimile device.

FIG. 3 is a block diagram showing a configuration of a control system of the facsimile device.

FIG. 4 is a flowchart showing a sequence for detecting the absence of ink and sheet jam in the facsimile device.

FIG. 5 is a schematic cross-sectional view showing a state of sheets discharged onto a sheet stacker in a conventional device.

FIG. 6 is a schematic cross-sectional view showing a state of sheets discharged onto a sheet stacker in the apparatus of the present invention.

FIG. 7 is a cross-sectional view showing a schematic configuration of a facsimile apparatus according to another embodiment.

FIG. 8 is a cross-sectional view showing a schematic configuration of a facsimile apparatus according to another embodiment.

FIG. 9 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 A ... Reading unit B ... Recording unit C ... Feeding unit P ... Recording paper 1 ... Sheet cassette 2 ... Feeding roller 3 ... Separation claw 4 ... Conveying roller 5, 6 ... Conveying roller 7 ... Sheet guide 8 ... Recording head 9 ... Conveyor roller 10 ... Pressing rollers 11,14 ... Discharge rollers 12,15,26 ... Spur 13 ... Lower guide 16 ... Sheet stacker 17 ... Photo sensor 18 ... Rib member 19 ... Carriage 19a ... Abutting part 19b ... Light shield 20 ... Guide Rod 21 ... Pulley 22 ... Timing belt 23 ... Flexible cable 24 ... Cap 25 ... Carriage home sensor 27 ... Weight member 28 ... Pin 31 ... Control unit 32 ... CPU 33 ... ROM 34 ... RAM 35 ... Detection circuit 36 ... Comparator 37 ... Sheet Feed drive means 38 ... Bed drive circuit 39 ... Carriage drive means 40 ... Image data 41 ... Image data input circuit 42 ... Image memory 43 ... Alarm circuit

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location B41J 13/10 B41J 3/04 101Z (72) Inventor Ken Kenno 3-30 Shimomaruko, Ota-ku, Tokyo No. 2 within Canon Inc. (72) Inventor Katsumi Obana 3-30-2 Shimomaruko, Ota-ku, Tokyo Within Canon Inc. (72) Takayuki Nishinohara 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Incorporated (72) Inventor Fumihiko Nakamura 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (7)

[Claims] 1. A recording unit that forms an image on a sheet, a conveying unit that conveys the sheet to the recording unit, a discharging unit that discharges the sheet after recording, and a sheet that is discharged by the discharging unit. A recording apparatus comprising: a stacking unit that stacks and holds the sheet; and a restricting unit that restricts a curl of sheets stacked on the stacking unit. 2. The recording apparatus according to claim 1, wherein the restricting unit is a rib member provided so as to face an upper surface of the stacking unit. 3. The regulating member is a rib member provided facing the upper surface of the stacking member and having a rotatable spur member at a contact portion with a sheet. Recording device. 4. The recording apparatus according to claim 1, wherein the regulating unit is a weight member that is provided so as to face the upper surface of the stacking unit and that is movable in the up-down direction to press the sheets. 5. The weight member, which is provided facing the upper surface of the stacking unit, has a rotatable spur member at a contact portion with the sheet, and is movable in the up-down direction to hold the sheet. The recording apparatus according to claim 1, wherein: 6. The recording apparatus according to any one of claims 1 to 5, wherein the recording apparatus has a driving unit for moving the regulating unit in a vertical direction for pressing a sheet. . 7. The recording apparatus according to claim 1, wherein the recording unit is an inkjet system that forms an image by ejecting ink on a sheet according to a signal.