JPH05310358A - Paper sheet discharging processing device and recording device - Google Patents

Abstract

PURPOSE:To contain a long recording paper sheet while saveing the space and perform paper sheet discharge processing wherein the recording paper sheet is easily taken out. CONSTITUTION:A recorded and discharged recording paper sheet 1 is wound for containing by means of a pair of upper and lower winding rollers 17 arranged in a winding containing part 16. Upper winding rollers 17a and 17b are moved aside from the recording paper sheet 1 and by releasing the winding containing part 16 by means of an opening closing lever 19, the recording paper sheet 1 can be taken out through a notch part 22 for discharge.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus such as a copying machine or an ink jet printer, and a sheet ejection processing apparatus applied to the recording apparatus for ejecting a recording sheet after recording.

[0002]

2. Description of the Related Art (1) Conventionally, plain paper, processed paper, OHP plastic paper, or the like has been used as a recording sheet used in a recording device such as a printer, a copying machine, or a facsimile.

8 and 9 are schematic sectional views of the recording apparatus. These recording devices are provided with a discharge tray 82 for discharging and storing a long recording sheet 81 after recording by the recording means 80. The recording sheet 81 after the recording is configured to be conveyed by a pair of discharge rollers 83, discharged to a discharge tray 82 via a discharge guide 84.

The discharge tray 82 is constructed so as to be able to store the recording sheet 81 of the maximum permissible size that the recording apparatus has. For example, as shown in FIG. As shown in FIG. 9A, a discharge tray having a curved curved storage portion is used.

(2) Conventionally, recording apparatuses using various recording means have been developed and put into practical use. Among them, an inkjet recording apparatus has been attracting attention as a recording apparatus for obtaining a full-color image. This is because the inkjet recording apparatus employs a recording method of performing dot recording by ejecting ink droplets from the recording head nozzles, and is a recording apparatus that is advantageous in terms of apparatus configuration, running cost, and the like. Further, since it is easier to increase the recording size as compared with the electrophotographic recording method, it is often used in a printer, plotter, copying machine, etc. for large format recording.

The above-mentioned ink jet recording apparatus is generally constructed so that a recording head having a nozzle array of a predetermined width (several millimeters to several tens of millimeters) scans the recording sheet vertically and horizontally to perform recording. ing. That is, the recording head is made to scan in the main scanning direction to perform recording with a predetermined width, and the recording sheet is fed out with a predetermined width in the sub-scanning direction each time one line of recording is completed.

In the above-mentioned recording apparatus, it is necessary to accurately feed the recording sheet in the sub-scanning direction by a predetermined width. When the feeding width of the recording sheet is small, the recording sheet overlaps with the recording one scan before and the feeding width is large. In this case, there is a possibility that there will be a gap with the recording one scan before. Such a phenomenon is more marked in the recording of pictures, photographs, etc. than in the recording of characters, symbols, etc., and particularly in the case of full-color recording, the image quality deteriorates remarkably.

The causes of the variation in the feed width are eccentricity, warpage, and bending of the sub-scanning roller for conveying the recording sheet in the sub-scanning direction, and the stop accuracy and rotation of the drive motor for driving the sub-scanning roller. For example, the gear cutting accuracy of the belt and the pulley for transmitting the driving force from the drive motor to the sub-scanning roller, the eccentricity of the pulley, and the like can be considered.
Particularly affected are the eccentricity of the motor pulley, the eccentricity of the sub-scanning roller itself, and the eccentricity of the roller pulley.

Therefore, in order to reduce the influence of the eccentricity, a method of setting the device so that a predetermined feed amount is obtained when the drive motor makes one rotation or a plurality of (integer) rotations,
Alternatively, a method has been proposed in which the sub-scanning roller and the roller pulley are set to have a predetermined feed amount when the sub-scanning roller and the roller pulley rotate once or a plurality of times (an integer).

[0010]

[Problems to be Solved by the Invention]

(1) However, in the above conventional technique (1),
In the case where the storage unit shown in FIG. 8A is a flat discharge tray 82, the discharge tray 82 that stores the recording sheet 81 that exceeds 3 m.
Is difficult to form, and for small trays
As shown in (b) to (c), the recording sheet 81 may be projected.

In the case where the storage section shown in FIG. 9A is a curved discharge tray 82, as shown in FIGS. 9B to 9C, a recording sheet of 1 to 2 m which exceeds A1 size. 81
However, there is a risk that the recording sheet 81 exceeding 3 m may protrude from the discharge tray and be damaged or bent.

Further, even when a plurality of recording sheets 81 or the recording sheets 81 wound in a roll shape are cut and used, in the case where the storage portion is a flat discharge tray 82, the leading end portion is curled. Therefore, the recording sheets 81 may not evenly overlap and may protrude from the tray.

In the case of the curved discharge tray 82, if the number of sheets is more than that, it is difficult to store, and the recording sheet 81 is discharged from the discharge tray 82. It was sometimes difficult to take it out.

(2) However, the above prior art (2)
If the predetermined feed width of the sub-scanning roller is 16 mm, the diameter of the roller becomes as thin as about 5 mm, and warping or bending may occur due to its own weight or the tension of the recording sheet. There was a risk that the pressure distribution in the portion in contact with the contact would be non-uniform. Therefore, the accuracy of the predetermined feed width of the sub-scanning roller is lowered, and the recording sheet may be skewed.

On the other hand, when the sub-scanning roller makes one rotation, the device is set so that the feeding amount is an integral multiple of the feeding amount of the predetermined width, and the roller is moved several times in the sub-scanning direction. A method of canceling variations in the feed amount due to eccentricity is generally adopted.

However, in a large-sized recording apparatus, the length of the sub-scanning roller is significantly longer than the diameter of the sub-scanning roller.

(1) An object of the present invention is to solve the above-mentioned problem (1) of the prior art, and to store a long recording sheet in a space-saving manner and to take it out easily, and the sheet discharging processing apparatus. It is to provide a recording apparatus having the.

(2) An object of the present invention is to solve the above-mentioned problem (2) of the prior art and to provide a recording apparatus capable of accurately conveying a recording sheet by a predetermined width.

[0019]

[Means for Solving the Problems]

(1) A typical means for solving the above-mentioned problem (1) of the prior art and applied to the embodiment described below is a sheet discharge processing apparatus for discharging a long recording sheet, and the discharged recording is performed. It has a storage part for storing a sheet, and a pair of upper and lower winding members for winding the recording sheet provided in the storage part, and after storing the recording sheet, the upper winding member from the storage part. It is characterized by being able to evacuate.

(2) A typical means for solving the above-mentioned problem (2) of the prior art and applied to the embodiments described below is as follows.
It has a recording unit for forming an image on a recording sheet according to image information, a conveying unit for stepwise feeding the recording sheet to the recording unit, and a bending prevention unit for preventing the bending of the conveying unit. It is characterized by

[0021]

According to the above-mentioned means (1), the recording sheet after recording is ejected to the accommodating portion, and is wound up and accommodated in the accommodating portion by the winding member. By retracting the upper winding member from the storage portion, the stored recording sheet can be easily taken out.

According to the above means (2), when the recording sheet is step-fed by the conveying means, eccentricity, warpage, bending, etc. of the roller generated in the conveying means can be corrected by the deflection preventing means, so that the predetermined width can be obtained. It can be conveyed with high accuracy.

[0023]

【Example】

[First Embodiment] An embodiment of the sheet ejection processing apparatus according to the present invention to which the above means (1) is applied and a recording apparatus having the sheet ejection processing apparatus will be described below with reference to the drawings.

FIG. 1 is a sectional explanatory view showing a schematic structure of a recording apparatus, FIG. 2 is a perspective explanatory view of a sheet discharge processing apparatus, FIG. 3 is a sectional view of a winding and accommodating section thereof, and FIG. 4 is a winding state of continuous paper. FIG. 5 is an explanatory diagram showing a sheet storage state, and FIGS. 6 and 7 are explanatory diagrams when a recording sheet is taken out from the sheet discharge processing apparatus.

First, the schematic structure of the recording apparatus will be described with reference to FIG. Reference numeral 1 denotes a long recording sheet wound in a roll shape, which is fed through a guide roller pair 2 and a feeding roller pair 3. 4 is a recording sheet 1
Is a cutter for cutting the sheet into a predetermined size and is conveyed to the recording means 7 by the pair of conveying rollers 5 and 6.

Reference numeral 8 denotes a cassette capable of stacking a plurality of recording sheets 1 such as precut sheets. The recording sheets 1 loaded in the cassette 8 are picked up by a pickup roller 9
Then, the sheets are fed one by one from the topmost one, and are conveyed to the recording means 7 by the conveying roller pairs 5 and 6 through the conveying roller pairs 10 and 11.

The recording means 7 records an ink image on the recording sheet 1 conveyed by the pair of conveying rollers 5 and 6. As the recording means in this apparatus, an inkjet recording method is used in which ink is ejected from a recording head to perform recording. That is, this recording head has a fine liquid discharge port (orifice), a liquid passage, and an energy acting portion provided in a part of this liquid passage, and energy generation that generates droplet forming energy that acts on the liquid in the acting portion. Equipped with means.

As the energy generating means for generating such energy, a recording method using an electromechanical transducer such as a piezo element, electromagnetic waves such as a laser are irradiated to generate heat, and droplets are ejected by the action of the heat generation. There are a recording method using an energy generating means, a recording method using an energy generating means for heating a liquid and discharging the liquid by an electrothermal converter such as a heating element having a heating resistor.

Among them, a recording head used in an ink jet recording method for ejecting a liquid by thermal energy has a high density of liquid ejection ports (orifices) for ejecting recording liquid droplets to form ejection liquid droplets. Since they can be arranged, high resolution recording is possible. Among them, the recording head using the electrothermal converter as the energy generating means can easily be made compact, and has the advantages of the IC technology and the microfabrication technology, which have been remarkably improved in the technology and the reliability in the recent semiconductor field. This is advantageous because it can be used in two parts, high-density mounting is easy, and the manufacturing cost is low.

Reference numeral 12 denotes a discharge roller pair for discharging the recording sheet 1 after recording, and a discharging guide 13 for the recording sheet 1.
The sheet is conveyed to the inside of the sheet discharge processing apparatus via the.
Reference numeral 14 is a discharge tray for discharging the recording sheet 1 when a sheet is used as the recording sheet 1, and 15 is a receiving tray for closing or retracting the inlet 16a of the winding and storing section 16 of the recording sheet 1. It is a stand. The pedestal 15 is movably attached by a driving means (not shown), and when the sheet is discharged, the introduction port 16a is closed to form a bottom portion.

The winding / storing section 16 is for discharging and storing the long recording sheet 1.
Inside, there is provided a pair of upper and lower take-up rollers 17 which are take-up members for taking up the recording sheet 1 in the arrow A direction. The shape of the winding guide (not shown) of the winding storage unit 16 is based on the curl of the recording sheet 1 wound in a roll shape and the diameter of the circle obtained when the recording sheet 1 is experimentally curled. Is formed in. In addition, the inlet 16a is
The curl of the recording sheet 1 wound in a roll shape, the curl generated in the conveyance path of the recording sheet 1, the curl of the leading end of the sheet generated by recording by the recording unit 7, etc. are taken into consideration and formed wide. ..

Reference numerals 18a and 18b denote sheet detection sensors for detecting the presence / absence of the recording sheet 1. In this embodiment, transmissive sensors are used. Reference numeral 19 denotes an opening / closing lever for opening / closing the winding / storing section 16, and a lever opening / closing detection sensor (not shown) is attached near the opening / closing lever 19. Reference numerals 20a and 20b are side regulating plates for aligning the recording sheet 1 in the width direction when the recording sheet 1 is wound in the winding storage portion 16.
The side regulating plates 20a and 20b are obliquely attached to the installation surface in order to prevent the recording sheet 1 from skewing (see FIG. 3).

Reference numeral 21 is a storage box that constitutes the exterior of the winding storage section 16. The upper take-up roller of the take-up roller pair 17
The diameters of 17a and 17b are larger than that of the lower take-up roller 17c, so that even if the leading end of the recording sheet 1 is rounded, it sneaks into between the take-up roller pair. The length of the upper take-up rollers 17a and 17b is L as shown in FIG.
_Since the recording sheet 1 is retracted after the winding of the recording sheet 1 is completed, if L ₁ is large, the sheet ejection processing apparatus becomes large. Therefore, L ₁ is set to the minimum length that is sufficient to apply the conveying force to the recording sheet 1.

The material of the upper winding rollers 17a and 17b is sponge, and the material of the lower winding roller 17c is neoprene rubber which is usually used for a feeding roller. The friction coefficient is a recording sheet. 1-lower winding roller 17c> recording sheet 1-upper winding roller 17a, 17b> recording sheet 1 mutually.

Reference numeral 22 denotes a winding storage unit 16 for the long recording sheet 1
It is a notch for discharge for further taking out. A feeding motor 23 is a driving source for the feeding roller pair 3, the conveying roller pairs 5, 6, 10, 11 and the pickup roller 9 via a clutch mechanism (not shown), and 24 is a discharging roller. The motor is a driving source of the discharge roller pair 12.

Next, the internal construction of the winding and storing section 16 will be described with reference to FIGS. The upper take-up rollers 17a, 17b of the take-up roller pair 17 are attached to one ends of rotary shafts 26a, 26b rotatably supported by the support plates 25a, 25b in the arrow B direction. In addition, the rotary shafts 26a, 26b
The first winding gears 27a and 27b are attached to the other end of the. The first take-up gears 27a, 27b are the second take-up gears 29a, 29a connected to the upper take-up roller drive motors 28a, 28b.
They are in mesh with 29b respectively.

The lower take-up roller 17c includes a support plate 30a,
It is attached to one end of a rotary shaft 32 which is rotatably supported in the direction of arrow C on the bearing 30b via bearings 31a and 31b. A third winding gear 33 that meshes with the first winding gear 27a is attached to a predetermined position of the rotary shaft 32, and the third winding gear 33 is connected to a lower winding roller drive motor 34. It meshes with the take-up drive gear 34a.

In the state where the recording sheet 1 is not present between the pair of take-up rollers 17, the upper take-up rollers 17a and 17b have the same peripheral speed as the lower take-up roller 17c. The gear ratios of the winding gears 27a and 27b, the second winding gears 29a and 29b, the third winding gear 33, and the winding drive gear 34a are set.

Further, no matter how many times the recording sheet 1 passes between the upper winding rollers 17a and 17b and the lower winding roller 17c, the recording sheet 1 does not come into close contact with a winding guide (not shown) and is wound up. The inner side of the recording sheet 1 is the upper winding roller 17
The rotation speed and torque of the upper take-up roller drive motors 28a, 28b are controlled by a control means (not shown) so as not to stick to a and 17b.

The support plates 25a and 25b have first endless first members.
The cable 35 and the second cable 36 are connected, and when the cable moves, the support plates 25a and 25b also move. The first cable 35 and the second cable 36
Is stretched around the cable fixing shaft 37 and the cable drive shaft 38 by winding the end portion several times. First above
One of the cable 35 and the second cable 36 is the support plate 25.
The cables a and 25b are connected to each other by a fixing portion 39, and the other cable is inserted into a cable through hole 40. Second above
The cable 36 is in a positional relationship symmetrical to the first cable 35 with respect to the axis connecting the rotating shafts 26a and 26b and the rotating shafts 30a and 30b.

Reference numerals 41 and 42 denote slide shafts whose both ends are supported by support plates 30a and 30b, which connect the rotary shafts 26a and 26b to the rotary shaft 32 in the same manner as the first cable 35 and the second cable 36. They are arranged symmetrically with respect to the elliptical line. The slide shafts 41 and 42 are elongated holes formed in the support plates 25a and 25b.
The support plates 25a and 25b are inserted through the slide shaft 25c and are configured to be movable in parallel in the arrow D direction and vertically movable in the arrow E direction along the slide shafts 41 and 42. Above long hole 25c
Has a length of L ₃ and regulates the movement amount of the upper winding rollers 17a and 17b in the arrow E direction.

The second take-up gears 29a and 29b are moved by the support plates 25a and 25b, and the first take-up gears 27a and 27b are moved.
It has a sufficient length so that it can be meshed even if b moves in the direction of arrow D.

Reference numeral 43a denotes a support base for supporting the portion immediately below the rotary shaft 26a between the first winding gear 27a and the support plate 25a. Similarly, although not shown, there is a space between the first winding gear 27b and the support plate 25b. A support base 43b for supporting the rotary shaft 26b is provided respectively.

Reference numeral 44 denotes a control lever, which is the support plate 25.
It is provided to move the a and 25b in the direction of arrow E shown in FIG. 2 to retract the upper winding rollers 17a and 17b that urge the surface of the recording sheet 1 after the winding of the recording sheet 1 is completed.

The rotary shafts 26a and 26b are mounted on a support base 43.
An elastic member (not shown) is urged downward between a and 43b and the support plates 25a and 25b. The support plates 25a, 25b
Even if the control lever 44 is swung in the direction of arrow F as shown in FIG. 3 to move the support plates 25a, 25b in the direction of arrow E shown in FIG. The biasing position of the elastic member is determined so that the second winding gears 29a and 29b mesh with each other.

A fourth winding gear 45 is attached to one end of the cable drive shaft 38 as shown in FIG. The fourth winding gear 45 meshes with a fifth winding gear 47 connected to a cable drive motor 46. Cable drive motor above
By driving 46, the cable drive shaft 38 is rotationally driven through the fifth winding gear 47 and the fourth winding gear 45, and the movement amounts of the first cable 35 and the second cable 36 are as shown in FIG. L ₂ is controlled to (L _2> L _1).

Next, the operation of the sheet discharge processing apparatus configured as described above will be described with reference to FIGS. 4 to 7. The size of the long recording sheet 1 wound in a roll is set by, for example, a key operation using an operation unit (not shown). In this embodiment, a long recording sheet 1 having an output size of recording sheet of A1 size or more is used.

First, in FIG. 4A, a pair of discharge rollers 12
In order to have some slack between the take-up roller pair 17 and
After a lapse of a predetermined time (a period of time in which the leading edge of the recording sheet 1 is considered to come into contact with the upper winding rollers 17a and 17b) after being detected by the sheet detection sensor 18b in the winding storage portion 16 through the discharge guide 13, The side winding roller drive motor 34 is driven to rotate. Recording sheet 1 with curl
Of the upper winding rollers 17a, 17 having a large roller diameter.
Along the line b, the roller crawls between the pair of rollers in the direction of arrow G.

Then, the recording sheet 1 is wound up by the winding roller pair 17 along a winding guide (not shown) in the winding accommodating section 16, and as shown in FIG. The recording sheet 1 and the upper take-up rollers 17a and 17b are allowed to pass through between the take-up roller pair 17 while being submerged.

When the recording sheet 1 is wound a plurality of times as described above, the driving of the upper take-up roller drive motors 28a and 28b is controlled by the control means (not shown), as shown in FIG.
As shown in (1), the diameter of the circle drawn by the recording sheet 1 is the same or the inner diameter is slightly smaller. If skew occurs when the recording sheet 1 is wound up, the skew is corrected by the side regulating plates 20a and 20b.

In the winding operation of the recording sheet 1, the recording sheet 1 pulled out from the roll is cut into a predetermined size, and then the rear end of the recording sheet 1 is detected by the sheet detecting sensor 18a.
Is detected by the upper winding roller drive motors 28a, 28
This is ended by stopping the driving of the drive motor 34 and the lower winding roller drive motor 34 (see FIG. 6).

After stopping the driving of the upper take-up roller drive motors 28a, 28b and the lower take-up roller drive motor 34 by the detection signal of the sheet detection sensor 18a, the control lever 44 shifts to the state shown in FIG. Upper winding roller 17 as shown
a, after retracting 17b from recording sheet 1 upward by L _3, by driving the cable drive motor 46, the support plate 25a,
25b is retracted in the width direction from the edge of the recording sheet 1 as shown in FIG. In this state, as shown in Fig. 7, the opening / closing lever
By opening the winding storage portion 16 by 19, the recording sheet 1 wound up from the discharge notch 22 can be taken out. Reference numeral 21a is a support member for supporting the open winding storage section 16.

When the sheet detection sensor 18b detects that the recording sheet 1 has been completely taken out from the winding and accommodating section 16, the cable drive motor 46 is rotated again and the supporting plates 25a and 25b are automatically moved to their original positions. Is configured to return to. Further, when a sensor (not shown) that detects the opening / closing of the opening / closing lever 19 confirms the original position of the opening / closing lever 19, the next discharge processing operation starts.

When a sheet is used as the recording sheet 1, the recording sheet 1 passes through the discharge guide 13 and is stored in the discharge tray 14. At this time, the processing operation after ejection differs depending on whether the horizontal width of the recording sheet 1 is longer or shorter than between the upper winding rollers 17a and 17b, or when a plurality of recording sheets 1 are continuously printed at one time.

First, when the width of the recording sheet 1 is shorter than between the upper take-up rollers 17a and 17b, the receiving port 15 closes the inlet 16a of the take-up storing section 16 so that the recording sheet 1 is taken up. The paper is discharged into the discharge tray 14 as shown in FIG. Then, the recording sheet 1 is taken out in the direction of the arrow I, and when the sheet detection sensor 18a detects that the recording sheet 1 has run out of the discharge tray 14, the pedestal 15 is retracted from the inlet 16a, and the next operation is performed.

Next, the horizontal width of the recording sheet 1 is the upper winding roller.
The processing operation when the length is longer than between 17a and 17b will be described. When only one recording sheet 1 is printed, the upper take-up roller drive motors 28a, 28b and the lower take-up roller drive motor 34 are not driven and the introduction port 16a is not blocked by the pedestal 15. As shown in FIG. 5A, the recording sheet 1 is discharged onto the discharge tray 14. Then, the recording sheet 1 is taken out in the direction of the arrow H, and when it is detected by the sheet detection sensor 18a that the recording sheet 1 is out of the discharge tray 14, the process proceeds to the next processing operation.

When a plurality of recording sheets 1 are continuously printed, the upper take-up roller drive motors 28a, 28b and the lower take-up roller drive motor 34 are driven as shown in FIG. 5 (b). The recording sheet 1 is wound in the same manner as a long paper having an output size of A1 size or more. Then, the wound recording sheet 1 is taken out by opening the winding storage portion 16 as described above.

According to the above construction, by winding and storing the recording sheet 1 in the winding and storing section 16, a long recording sheet can be discharged and stored in a small space. Moreover, when the upper winding rollers 17a and 17b are retracted from the recording sheet 1 at the time of taking out, the recording sheet can be easily taken out without being damaged.

In the embodiment described above, the upper winding roller is used.
The constitution is such that 17a and 17b are slid from the winding portion of the recording sheet 1 and retracted, but the present invention is not limited to this, and for example, the biasing force of the upper winding rollers 17a and 17b on the recording sheet 1 is the paper thickness. It is also possible to swing up and down as long as it is constant regardless of the above.

Further, although the ink jet recording system is used as the recording means in the above-mentioned embodiment, the electrothermal converter is energized according to a recording signal, and the film generated in the ink by the thermal energy applied by the electrothermal converter. It is more preferable that the recording is performed by ejecting the ink from the ejection port due to the growth and contraction of bubbles generated in the ink by utilizing boiling.

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 continuous type, but in the case of the on-demand type in particular, it is arranged corresponding to the sheet or liquid path holding the liquid (ink). By applying at least one drive signal to the electrothermal transducer, which corresponds to the recorded information and provides a rapid temperature rise beyond nucleate boiling,
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. Due to the growth and contraction of the bubbles, the liquid is ejected through the ejection opening to form at least one droplet. It is more preferable to make this drive signal into a pulse shape because bubbles can be grown and contracted immediately and appropriately, so that particularly excellent liquid ejection can be achieved.

As the pulse-shaped drive 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 of the invention relating to the rate of temperature rise of 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 straight liquid passage or the right-angled liquid passage) as disclosed in the above-mentioned respective specifications. The present invention also includes configurations using US Pat. Nos. 4,558,333 and 4,459,600, which disclose configurations in which the heat acting portion is arranged in a bending region.

Further, JP-A-59-123670, which discloses a structure in which a common slit is used as a discharge portion of a plurality of electrothermal converters, and an opening for absorbing a pressure wave of thermal energy are disclosed. Japanese Patent Application Laid-Open No. Sho-A-Ko
The effect of the present invention is effective even with the configuration based on Japanese Patent Publication No. 59-138461. 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 one recording head integrally formed.

In addition, even in the case of the serial type described above, it is possible to electrically connect to the apparatus main body and supply ink from the apparatus main body by mounting the recording head fixed to the carriage or the carriage. A replaceable chip type recording head or a cartridge type recording head in which an ink tank is integrally provided in the recording head itself may be used.

Further, it is preferable to add recovery means for the recording head, preliminary auxiliary means, etc., which are provided as a constitution of the recording apparatus of the present invention, because the effects of the present invention can be further stabilized. Specific examples thereof include a capping unit for the recording head, a cleaning unit, a pressurizing or suction unit, an electrothermal conversion type or a heating element other than this, or a preheating unit using a combination thereof,
It is also effective to perform stable recording by performing a preliminary ejection mode in which ejection is performed separately from recording.

Regarding the type or number of recording heads mounted on the carriage, for example, only one is provided corresponding to a single color ink, or a plurality of inks having different recording colors and densities are supported. And a plurality of them may be provided. That is, for example, the recording mode of the recording apparatus is not limited to a recording mode of only the mainstream color such as black, but may be a combination of a plurality of recording heads integrally formed, but a mixed color of different colors or a mixed color It is also applicable to a device having at least one of the full colors according to

In addition, although the ink is described as a liquid in the above-described embodiments, it is an ink that solidifies at room temperature or lower and softens or liquefies at room temperature, or in the ink jet recording system. 30 inks
It is common to adjust the temperature within the range of ℃ to 70 ℃ to control the viscosity of the ink so that it is in the stable ejection range. good. In addition, it is possible to prevent the temperature rise due to thermal energy from being positively used as the energy for changing the state of the ink from a solid state to a liquid state, or to use ink that solidifies when left standing for the purpose of preventing ink evaporation. However, in any case, when heat ink is liquefied by application of heat energy according to a recording signal and liquid ink is ejected, or when the ink reaches a recording sheet, it begins to solidify. It is also applicable when using an ink that has the property of being liquefied for the first time by energy.

The ink in such a case is described in JP-A-54-5.
As described in Japanese Patent Publication No. 6847 or Japanese Patent Laid-Open Publication No. Sho 60-71260, a mode in which the porous sheet is opposed to the electrothermal converter in a state of being held as a liquid or a solid in the concave portion or the through hole. Also good. The most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

Further, as the form of the above-mentioned ink jet recording apparatus, besides the one used as an image output terminal of an information processing apparatus such as a computer, a copying apparatus combined with a reader or the like, or a facsimile apparatus having a transmitting / receiving function is used. It may be a form or the like.

Although an example using the ink jet recording system as the above-mentioned recording means has been described, the present invention need not be limited to the ink jet recording system, and other thermal transfer recording systems, thermal recording systems, and Can also be applied to a recording method other than the impact recording method such as the wire dot recording method. Further, it is not necessary to limit to the serial recording method, and a so-called line recording method may be used.

[Second Embodiment] Next, an embodiment of a recording apparatus according to the present invention to which the above means (2) is applied will be described with reference to the drawings. 10 is a cross-sectional explanatory view showing a schematic configuration of the recording apparatus, FIG. 11 is a perspective explanatory view showing a recording portion, FIG. 12 is a cross-sectional explanatory view of an eccentric conveyance roller, and FIG. 13 is an explanatory view of a backup roller.

First, the schematic structure of the recording apparatus will be described with reference to FIG. Reference numeral 48 denotes a recording apparatus main body, and a cassette 50 accommodating a recording sheet 49 which is a cut sheet is detachably attached to the bottom of the apparatus main body 48. A pickup roller 51 is provided on the upper side of the mounting portion of the cassette 50, and the pickup roller 51 contacts the uppermost recording sheet 49 of the cassette 50 and feeds it. Reference numeral 52 denotes a manual feed tray for manually feeding the recording sheet 49.

On the downstream side of the cassette 50 in the sheet conveying direction, a pair of conveying rollers 53 and 54 are provided,
The recording sheet 49 fed from 50 is conveyed.

Reference numeral 55 denotes a sub-scanning roller which is a conveying means, and the recording sheet conveyed by the pair of conveying rollers 54.
The step 49 is stepped by a predetermined amount according to the recording width of the recording head described later. Further, reference numeral 56 is a backup roller which is a deflection preventing means, is in pressure contact with the sub-scanning roller 55 with a predetermined pressing force, and is driven to rotate according to the rotation of the sub-scanning roller 55.

Reference numeral 57 is a recording head as recording means,
Ink is ejected onto the recording sheet 49 according to image information to perform recording. The recording head 57 is integrally mounted on a carriage 58, and the carriage 58 reciprocates along a main scanning rail 58a in a direction perpendicular to the drawing. The recording head 57 uses the ink jet recording method as in the first embodiment, and the description of the specific structure is omitted.

A platen 59 is provided so as to face the recording head 57 with the recording sheet 49 interposed therebetween, prevents the recording sheet 49 from floating during the recording operation and keeps the recording sheet 49 flat, and In order to prevent the contact with the recording head 57, for example, an air suction device or a suction suction device such as an electrostatic suction plate is provided.

Denoted at 60a and 60b are a pair of discharge rollers for discharging the recording sheet 49 after recording out of the apparatus. Also
61 is a discharge tray, and the discharge roller pair 60a, 60b
The recording sheets 49 ejected by are stacked.

Next, the configuration of the recording unit will be described more specifically with reference to FIG. In FIG. 11, a recording head 57 is mounted on the carriage 58, and the recording head 57 includes cyan (c), magenta (m), yellow (y),
Recording head 57 corresponding to each color ink of black (k)
It is equipped with c, 57m, 57y and 57k. These color recording heads 57c, 57m, 57y, 57k are provided with ink cartridges 62c, 62m, 62 mounted on the carriage 58.
Ink is supplied from y and 62k.

The carriage 58 is connected to a main scanning belt 58b stretched between main scanning pulleys (not shown). The main scanning pulley 58b is rotated by a main scanning motor (not shown) to drive the main scanning belt. Scanning belt 58
The carriage 58 is reciprocally moved in the main scanning direction via b.

A pulse motor 63 drives the sub-scanning roller 55 and the discharge roller 60a to rotate.
A motor pulley 63a connected to the pulse motor 63,
A belt 64 is stretched around roller pulleys 63b and 63c connected to the rotary shafts of the sub-scanning roller 55 and the discharge roller 60a, and the driving force from the pulse motor 63 is transmitted to each roller via the belt 64. Is configured.

Next, with reference to FIG. 12, a method of correcting variations in the feed amount due to the eccentricity of the sub-scanning roller 55 and the roller pulley 63b will be described. If the outer circumference of the sub-scanning roller 55 is three times the predetermined feed amount, 120 ° per feed amount
It will rotate. However, when the actual rotation center O ′ deviates from the ideal rotation center O by “a” (the eccentric amount is “a”), the feed amount for each time becomes L1 <L2 <L3, which causes variations.

In order to offset this variation in the feed amount, if the rotation angle of the sub-scanning roller 55 is set to 360 ° or an integral multiple thereof, the feed amount will always be the outer periphery of the roller 55 or an integral multiple thereof. Variation due to eccentricity disappears. This is not limited to the case of the sub-scanning roller 55, but the roller pulley 63
The same applies to the case of b.

Next, with reference to FIG. 11, a method of canceling the variation in the feed amount in this embodiment will be specifically described. In this example,
The feed amount ratio between the motor pulley 63a and the roller pulley 63b is set to 1: 3, and the pulse motor 63 and the motor pulley 63a rotate three times to cause the sub-scanning roller 55 and the roller pulley.
63b is set to rotate once.

Further, in the present embodiment, the recording heads 57c, 57
The printing width of m, 57y, 57k is 16.256mm (256 nozzles,
Since it is 400 DPI), the predetermined feed amount of the sub-scanning roller 55 is set to 16.256 mm. Therefore, the sub-scanning roller
The diameter is 5.17mm so that the 55 feeds one revolution
Is set to.

However, for example, when the recording sheet 49 of A4 size is used, the length in the thrust direction of the sub-scanning roller 55 needs to be at least 300 mm or more, and the diameter is remarkably smaller than this roller length. Deflection due to its own weight and the tension of the recording sheet 49 occurs by itself. In order to prevent the sub-scanning roller 55 from bending, a pair of backup rollers 56 is used.

FIG. 13 shows a specific structure of the backup roller 56. The backup roller 56 has bearings 65 on both ends.
It is rotatably supported by. The backup roller 56 can be pressed against the sub-scanning roller 55 by pressing the arm 67 biased by the spring 66 against the bearing 65. The pressure contact force of the backup roller 56 can be adjusted by changing the attachment position of the spring 66 to the arm 67.

According to the above configuration, the deviation of the predetermined feed amount of the recording sheet 49 due to the eccentricity of the sub-scanning roller 55 and the roller pulley 63b, the deviation of the feed amount due to the bending of the sub-scanning roller 55, and the skew feeding of the recording sheet 49 are caused. Can be prevented,
The step feed operation of the recording sheet 49 in the sub scanning direction can be stabilized.

Although two backup rollers 56 having the same diameter are used in this embodiment, the number, diameter, length, etc. can be changed depending on the diameter of the sub-scanning roller 55 and the structure of the apparatus main body 48. Is.

[Third Embodiment] Another example of the recording apparatus shown in the second embodiment will be described with reference to the drawings. Figure 14
FIG. 15 is a perspective explanatory view showing a recording portion, and FIG. 15 is an explanatory view of a backup roller. The schematic structure of the apparatus is the same as that of the second embodiment, and the same members are designated by the same reference numerals and the description thereof is omitted.

The sub-scanning roller 55 shown in FIG. 14 has a diameter set so as to feed the recording sheet 49 by a predetermined amount in one rotation, as in the second embodiment, and the sub-scanning roller 55 prevents the roller from bending. A pair of backup rollers 68 are provided at the center of the.

FIG. 15 shows the structure of the backup roller 68. The backup roller 68 is rotatably attached to a holder 70 attached to the chassis of the apparatus main body 48 by adjusting screws 69. A compression spring 71 is attached between the holder 70 and the chassis, and the backup roller 68 is pressed against the sub-scanning roller 55 by urging the holder 70 vertically upward with respect to the chassis. The pressure contact force can be adjusted by changing the compression amount of the spring 71 between the holder 70 and the chassis with the adjusting screw 69.

Also with the above configuration, it is possible to prevent variations in the predetermined feed amount of the recording sheet 49 due to the eccentricity of the sub-scanning roller 55 and the roller pulley 63b, variations in the feed amount due to the bending of the sub-scanning roller 55, and skewing of the recording sheet 49. In particular, the sub-scanning roller 55 is particularly effective for a large-sized recording apparatus having a long thrust direction.

Although two backup rollers 68 having the same diameter are used in this embodiment, the number, the diameter of the rollers, the arrangement position, etc. may be changed depending on the diameter of the sub-scanning roller 55 and the structure of the apparatus main body 48. Is possible.

[0096]

【The invention's effect】

(1) As described above, according to the present invention, a long recording sheet can be discharged and stored in a small space by winding and storing the recording sheet by the winding member provided in the winding and storing section.

Further, since the upper winding member retracts from the recording sheet when the recording sheet is taken out, the recording sheet can be easily taken out without being damaged. In particular, cut sheets and long sheets of 3 m or more can be discharged and stored, and can be easily taken out.

(2) According to the present invention, as described above, when the recording sheet is step-fed by the conveying means, the eccentricity, warpage, bending, etc. of the roller generated in the conveying means can be corrected by the deflection preventing means. It can be conveyed with a predetermined width with high precision. Therefore, it is possible to stabilize the conveying operation of the recording sheet and obtain a high-quality recorded image.

[Brief description of drawings]

FIG. 1 is an explanatory cross-sectional view illustrating a schematic configuration of a recording apparatus according to a first embodiment.

FIG. 2 is a perspective explanatory view of a sheet discharge processing device.

FIG. 3 is a cross-sectional view of a winding / accommodating portion of the sheet ejection processing apparatus.

FIG. 4 is an explanatory diagram showing a winding state of continuous paper.

FIG. 5 is an explanatory diagram showing a stored state of a sheet.

FIG. 6 is an explanatory diagram when a recording sheet is taken out from the sheet discharge processing device.

FIG. 7 is an explanatory diagram when a recording sheet is taken out from the sheet discharge processing device.

FIG. 8 is an explanatory diagram of a conventional sheet discharge processing device.

FIG. 9 is an explanatory diagram of a conventional sheet discharge processing device.

FIG. 10 is an explanatory cross-sectional view illustrating a schematic configuration of a recording device according to a second embodiment.

FIG. 11 is a perspective view illustrating a recording unit.

FIG. 12 is a cross-sectional explanatory view of an eccentric transport roller.

FIG. 13 is an explanatory diagram of a backup roller.

FIG. 14 is a perspective explanatory diagram illustrating a recording unit according to a third embodiment.

FIG. 15 is an explanatory diagram of a backup roller.

[Explanation of symbols]

 1, 49 ... Recording sheet 2 ... Guide roller pair 3 ... Feeding roller pair 4 ... Cutter 5, 6, 10, 11, 53, 54 ... Conveying roller pair 7 ... Recording means 8, 50 ... Cassette 9, 51 ... Pickup roller 12, 60a, 60b ... Ejection roller pair 13 ... Ejection guide 14, 61 ... Ejection tray 15 ... Receiving stand 16 ... Take-up storage 16a ... Inlet 17 ... Take-up roller pair 18a, 18b ... Sheet detection sensor 19 ... Opening lever 20a, 20b ... Side regulation plate 21 ... Storage box 22 ... Discharge notch 23 ... Feed motor 24 ... Discharge motor 25a, 25b, 30a, 30b ... Support plate 26a, 26b, 32 ... Rotating shafts 27a, 27b ... First Take-up gears 28a, 28b ... Upper take-up roller drive motors 29a, 29b ... Second take-up gears 31a, 31b, 65 ... Bearing 33 ... Third take-up gear 34 ... Lower take-up roller drive motor 34a ... Take-up drive Gear 35 ... First cable 36 ... Second cable 37 ... Cable fixed shaft 38 ... Cable drive shaft 39 ... Fixed part 40 ... Cable through holes 41, 42 ... Slide shafts 43a, 43b ... Support base 44 ... Control lever 45 ... Fourth winding gear 46 ... Cable drive motor 47 ... Fifth winding gear 48 ... Recording device main body 52 ... Manual feed Tray 55 ... Sub-scanning roller 56 ... Backup roller 57 ... Recording head 58 ... Carriage 58a ... Main scanning rail 59 ... Platen 63 ... Pulse motor 63a ... Motor pulley 63b, 63c ... Roller pulley 64 ... Belt 66, 71 ... Spring 67 ... Arm 68 ... Backup roller 69… Adjusting screw 70… Holder

Claims (10)

[Claims] 1. A sheet ejection processing device for ejecting a long recording sheet, and a storage section for storing the discharged recording sheet, and an upper and lower section for winding the recording sheet provided in the storage section. A sheet discharge processing device comprising a pair of winding members, wherein the upper winding member can be retracted from the storage portion after the recording sheet is stored. 2. A recording apparatus comprising: recording means for forming an image on a recording sheet according to image information; and the sheet discharge processing apparatus according to claim 1 for discharging the recorded recording sheet. 3. A recording unit for forming an image on a recording sheet according to image information, a conveying unit for causing the recording unit to stepwise feed the recording sheet, and a bend for preventing the conveying unit from bending. A recording device having: a prevention unit. 4. The recording apparatus according to claim 3, wherein the conveying unit uses a conveying roller having a diameter that conveys a predetermined amount of the recording sheet when rotated by an integral number of times. 5. The recording apparatus according to claim 3, wherein the bending prevention unit is at least one cylindrical backup roller that is in contact with the conveyance unit. 6. The recording apparatus according to claim 3, wherein the deflection preventing unit is at least one backup roller that contacts the conveying unit. 7. The recording apparatus according to claim 3, wherein the flexure preventing means has an adjusting means for adjusting a pressure contact force in contact with the conveying means. 8. The recording apparatus according to claim 2, wherein the recording apparatus is an inkjet recording system in which a recording unit ejects ink in accordance with a signal to perform recording. 9. The recording apparatus according to claim 8, wherein the recording apparatus includes an electrothermal converter for the recording unit to generate thermal energy for ejecting ink. 10. The recording apparatus according to claim 9, wherein the recording means ejects the ink from the ejection port by utilizing the film boiling generated in the ink by the thermal energy printed by the electrothermal converter. The recording device described.