JPH05330030A - Recorder - Google Patents

Abstract

(57) [Abstract] [Purpose] In a recording apparatus that conveys recording paper by rotation of a cylindrical member having a part of the opening and defines the recording surface of the recording paper by the surface of the member, It is possible to control the recording paper conveyance without considering the rotational position. [Structure] The opening 61 of the suction cylinder 6 as a cylindrical member is closed by moving a shutter 60 stored inside the cylinder 6 as necessary. As a result, the cylinder 6 can form a peripheral surface having no opening.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording device, and more particularly to a recording device used as an image recording device in a copying machine.

[0002]

2. Description of the Related Art Among various recording methods, a non-impact recording method has an advantage that noise during recording is extremely small to a negligible level. Among them, the inkjet recording method, which enables high-speed recording and allows recording on plain paper without requiring a specific fixing process, is a powerful recording method.

A recording head applied to a recording apparatus using this ink jet system generally has a fine ink ejection port, an ink path communicating with the ejection port, and an energy acting section provided in a part of this ink path. There is provided energy generating means for applying energy to the ink in the action portion to eject the ink from the ejection port.

As such energy generating means,
A means using an electromechanical transducer such as a piezo element, a means for irradiating electromagnetic waves such as a laser to the ink in the energy acting part to cause the ink to generate heat, and ejecting or flying ink droplets by the action of the heat generation, or a heat resistance There is a unit that heats the ink by an electrothermal conversion element having a body to generate bubbles, and ejects the ink by the generation of the bubbles.

Among these, the recording head used in the ink jet recording system for ejecting ink by utilizing thermal energy has a high resolution because the ejection ports (orifices) for ejecting ink can be arranged at a high density. It is possible to record Among them, the recording head using the electrothermal conversion element as the heat energy generating means,
It is easy to reduce the size and cost of the recording head as a whole.

In other words, the advantages of IC technology and microfabrication technology, which have been remarkably improved in technology and reliability in recent semiconductor fields, can be fully utilized, and lengthening and planarization (two-dimensionalization) are easy. Therefore, it is possible to mount a large number of ejection ports with high density, and in addition, mass production is possible with high productivity.
It can be manufactured at low cost.

As described above, the recording head using the electrothermal converter for the energy generating means is generally provided with an ink path corresponding to each orifice, and an electrothermal converter for generating thermal energy is provided for each ink path. Has been. Further, the ink is supplied to these ink passages from a common liquid chamber communicating with each ink passage.

FIG. 1 is a perspective view showing a schematic structure of such an ink jet recording head. Etching / deposition /
The electrothermal conversion element 110 formed into a film on the substrate 1102 through a semiconductor manufacturing process step such as sputtering.
3, an ink jet recording head 1101 including an electrode 1104, an ink path wall 1105, and a top plate 1106 bonded thereon is shown. Ink is supplied from an ink tank (not shown) into the common liquid chamber 1108 via a supply pipe 1107. In the figure, 1109 is a supply pipe connector. The ink supplied into the common liquid chamber 1108 is supplied into the ink path 1110 by a capillary phenomenon, and forms a meniscus in the vicinity of the ejection port 1111 at the tip of the ink path. When the electrothermal conversion element 1103 is energized, the ink on the electrothermal conversion element surface is rapidly heated, and bubbles are generated in the ink path. Then, the ink is ejected from the ejection port 1111 by the expansion and contraction of the bubbles. With the configuration as described above, the discharge port density 16
It is possible to realize a so-called serial type recording head having 128 or 256 ejection ports at a high density of the number of the holes / mm. It is also possible to configure a so-called full line type recording head in which a larger number of ejection openings are arranged and which has an ejection opening arrangement corresponding to the recording width.

FIG. 2 is a schematic perspective view showing a structural example of an ink jet recording apparatus in which the above-mentioned ink jet recording head is actually mounted in a recording apparatus. This apparatus is a serial scan type recording apparatus, and four recording heads 1101 corresponding to four ink colors are integrally formed with a gear ridge 1214 which is reciprocated on a rail 1213a by driving a motor 1216. Ink tank 1
The yellow (Y), magenta (M), cyan (C), and black (black) inks contained in 222Y, 1222M, 1222C, and 1222B are pumped 1223, respectively.
It is supplied into the recording head 1101 by Y, 1223M, 1223C, and 1223B. Recording member (recording paper, etc.)
(Not shown) is a recording head 1 by a platen roller 1212.
The sheet is conveyed to a position facing the ejection port of 101 and temporarily stopped. The recording head 1101 has rails 1213a,
Image recording is performed on recording paper by ejecting ink of each color while moving forward along 1213b. When an image of a predetermined width is recorded, the recording head 1101 moves the rail 1213a. 1
213b, it returns in the opposite direction to the above and returns to the home position.
The sheet is conveyed by a predetermined amount by 2 and is stopped again. Image recording is performed by repeating such operations.

By the way, in the case of the serial scan system,
Generally, there are the following disadvantages.

That is, according to this method, the recording head is reciprocated while the recording paper is being conveyed to perform recording line by line to form an image. For this reason, an error occurs in the carry amount of the recording paper, and when the carry amount is less than the predetermined carry amount, overlapping recording is performed at the joint portion of each line, and this portion appears as black streaks in the image. On the other hand, when the carry amount is larger than the predetermined amount, white stripes are formed, which affects the image. Further, since the ink is ejected while the recording head itself is moved to form an image, mechanical vibration must be prevented and the accuracy of each part of the device must be improved, which causes problems such as high cost and large size of the device. ..

Further, in the case of the serial scan system, since an image is formed line by line, it takes a relatively long time to print one sheet of recording paper.

In contrast to the above serial scan type ink jet recording apparatus, there is known an ink jet recording apparatus using a full line type recording head in which a large number of ejection openings are arranged over a length substantially equal to the width of the recording paper. Has been. In this apparatus, the recording head is fixed, and recording is performed by moving the recording paper relative to this.

An example of such a device configuration is shown in FIG. 3, focusing on the ink circulation system.

FIG. 3 is a schematic diagram showing the structure of a full line type recording head and its ink supply means.
Is a recording head, 1652 is a common liquid chamber in the recording head 1601, and 1653 is a plurality of ejection ports arranged on the ejection port surface 1654. Thus, the discharge port 1653 of this embodiment
Are arranged over the entire recordable width of the target recording material, and selectively drive the electrothermal conversion elements provided in the liquid passages (not shown) leading to the respective ejection ports 1653. By doing so, it is possible to eject ink and perform printing without moving and scanning the print head itself.

Reference numeral 1655 is a supply tank for storing ink to be supplied to the recording head 1601, and 1656 is a supply tank 1.
It is a main tank for replenishing the recording liquid (ink) with 655. Ink is supplied from the supply tank 1655 to the supply pipe 1
Common liquid chamber 1652 of the recording head 1601 through 657
In addition, when the ink is replenished, the ink is replenished from the main tank 1656 to the supply tank 1655 by the recovery pump 1659 through the one-way replenishment rectifying valve 1658. Also, 1660 is a recording head 1601.
One-way recovery rectifying valve used for recovery operation for recovery of discharge function
A circulation tube having 60 interposed therein, and also 1662
Is an electromagnetic valve provided in the first supply pipe 1657 described above, and 1663 is an air vent valve for the supply tank.

The recording head 1601 configured as described above
In the ink supply system and the recovery system thereof, the electromagnetic valve 1662 is kept open at the time of recording, and the ink is replenished from the supply tank 1655 to the common liquid chamber 1652 by its own weight and the liquid chamber 1652. Is guided to the vicinity of the discharge port 1653 via a liquid path (not shown) by a capillary force. In the recovery operation performed to remove the bubbles remaining in the common liquid chamber 1652 and the supply system and cool the recording head 1601, the recovery pump 1659 is driven to transfer the ink to the common liquid chamber 1661 through the circulation pipe 1661. Chamber 16
52 into the first supply pipe 16 from the common liquid chamber 1652.
It is returned to the supply tank 1655 via 57 and circulated.
Furthermore, at the time of initial filling of the liquid path or the like, the recording liquid is pressure-fed to the common liquid chamber 1652 through the circulation pipe 1661 by the pump 1659 with the electromagnetic valve 1662 closed, and the recording liquid is discharged from the discharge port 1653 along with the discharge of bubbles. Can be made

In general, such a recording head is left with ink remaining inside the ejection port during non-recording. Therefore, the ink jet recording apparatus is not provided with a so-called recovery system for preventing ejection failure due to thickening of ink in the recording head or for recovering this ejection failure state to a good state. Well known.

As such a recovery system, there is a structure for ink circulation as described above, but the following can be mentioned as other structures. There is a capping mechanism that has a cap that can be joined to the ejection port surface of the recording head. Here, by joining the cap and the recording head during non-recording, the ejection port surface is sealed from the surrounding atmosphere while the recording head is covered with a lid, and the space inside the joint is kept wet. By doing so, the evaporation of the ink liquid and the accompanying increase in viscosity and the drying of the ink in the ink path are prevented.

Further, in a low humidity environment or when recording is suspended for a long period of time, the viscosity of the ink increases even if the capping as described above is performed to prevent the evaporation of the ink liquid in the ink passage. Therefore, it may not be possible to prevent non-ejection or unstable ejection of ink from the ejection port during recording after the recording suspension period. In such a case, the structure of suction recovery in which ink is sucked from the discharge port through the cap and the thickened ink is discharged, or the recovery pump 1659 as described above is driven to circulate and pressurize the ink, It is also possible to use a configuration for recovering the pressure so that the ink is ejected from all the ejection ports. Further, for the above-mentioned one in which the non-ejection state is slight, all electrothermal conversion elements of the recording head are driven to perform ejection similar to that for recording on a sheet or the like, that is, so-called empty space. Discharge can be used.

When the above-described recovery system is provided in an ink jet recording apparatus using a full line type recording head, the size of the recording head and the fixed position of the recording head limit the position of the arrangement. That is,
Generally, the cap of the recovery system is provided so as to face the surface of the recording head on which the ejection ports are arranged, and is movable relative to the recording head. In such a case, in a configuration in which a cylindrical carrier that also serves as a platen and faces the recording head is used, the recovery system is often arranged in the hollow portion of the carrier.

According to the ink jet recording apparatus having the full-line type recording head described above, unlike the serial scan method, the recording paper is continuously conveyed, and the image is recorded during this period. It does not cause problems such as white lines and black lines that are seen in the scanning method.

The full line type recording head is
It is also possible to adopt a configuration in which the ejection ports are arranged in one row in the longitudinal direction, and in such a case, there is no inconvenience even if the platen has a curved surface. For this reason, the above-mentioned cylindrical carrier can be used. Then, by using such a cylindrical rotatable transporting body (transporting cylinder), it is possible to reduce the variation in the transporting speed, and it is possible to reliably prevent the pitch irregularity of the recording pixels. Become.

[0024]

However, when a rotatable transport cylinder (generally holding a recording sheet by suction) is used as a cylindrical transport body that also serves as a platen, and the recovery system is arranged inside the transport cylinder, The transfer cylinder must be provided with an opening through which a recovery system cap or the like or a recording head can pass when performing a recovery operation.

In such a case, the portion of the transfer cylinder where the opening is provided cannot function as a platen. That is, the recording sheet cannot be supported by the opening, and the recording sheet cannot be regulated to form a good recording surface. Therefore, when the recording sheet is conveyed, the positional relationship between the opening of the conveying cylinder and the recording sheet must be appropriately controlled, and the structure for that purpose increases the cost and complexity of the entire apparatus.

Further, since there is an opening, there is a problem that recording cannot be performed on a recording paper longer than the outer circumference of the transport cylinder (excluding the opening).

The present invention has been made in order to solve the above problems, and by providing an opening / closing shutter at the recovery opening of the transfer cylinder, the control of the transfer of recording paper in consideration of the position of the opening is performed. It is an object of the present invention to provide a recording device that does not require the recording paper and does not limit the length of the recording paper.

[0028]

Therefore, according to the present invention,
In a recording apparatus for performing recording on a conveyed recording medium, a recording head used for the recording and a member provided with an opening in a part of a surface traveling by rotation,
To convey the recording medium by the traveling surface, and to close the rotation conveying member that regulates the recording surface of the recording medium by the surface facing the recording head by the traveling, and the opening of the rotating conveyance member. And a shutter means.

[0029]

According to the above construction, at least during recording, the shutter means can close the opening provided on the traveling surface of the rotary conveying member. As a result, the recording medium will not be caught in the opening and the recording surface thereof will not be well regulated, so that control that takes into account the rotational position of the opening and the conveyance timing of the recording medium is not necessary.

[0030]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 4 is a schematic side view of an ink jet recording apparatus according to an embodiment of the present invention.

In FIG. 4, 1A and 1B are cassette cases for accommodating recording papers of different sizes, 2A and 2B are pickup rollers for feeding the recording papers from the accommodating cassettes 1A and 1B, respectively.
Denoted at 3A and 3B are separation rollers for separating the recording papers fed out by the pickup rollers 2A and 2B and feeding the recording papers one by one to a transport path. Reference numeral 4 denotes a transport timing of the recording papers fed to the transport path. Sensor of
The rotation of the suction cylinder 6 and the black, cyan, etc. provided along the circumference of the cylinder 6. Recording heads 1601a, 1601b, 1601 for magenta and yellow ink
c, a pair of registration rollers for adjusting the discharge timing of 1601d. Reference numeral 51 denotes a charging roller provided on the side portion of the cylindrical suction roller cylinder 6, by which the surface of the suction cylinder 6 can be charged. The recording paper conveyed to the suction cylinder 6 is pressed by the suction roller 5 and is urged against the surface of the suction cylinder 6 to be electrostatically sucked.

Reference numeral 7 denotes an absorber provided below the cylinder 6 for cleaning the surface of the suction cylinder 6, which is fixed to one of the cleaning supports 8 and the other is biased by a spring and positioned by a stopper 9. ing. Reference numeral 11 denotes a blade for cleaning the surface of the suction cylinder 6, which wipes ink droplets adhering to the surface as the cylinder 6 rotates. Reference numeral 12 is a V-shaped blade support, and the blade 11 supports the cylinder 6
The ink wiped from the surface is sent to a waste ink tank (not shown) through the hole 12A.

Reference numeral 14 is a swing cam that swings the recovery system 17, and is provided so as to rotate about a rotary shaft 29. Reference numeral 16 is a recovery system stopper for determining the lower limit position of the recovery system 17, and 15 is a discharge tube for sending waste ink generated by the recovery processing in the recovery system 17 to a waste ink tank (not shown). 18a, 18b, 18c,
18d is the recording heads 1601a, 1601b, 1601.
c and 1601d are provided in the recovery system,
It is an absorber for receiving the ink discharged from the ejection port of the recording head.

The ink absorbed by the absorbers 18a to 18d is squeezed by the diaphragm mechanism 19a provided for each absorber.
It is squeezed by 19b, 19c and 19d, and is discharged to the waste ink tank through the discharge tube 15.

Details of the suction cylinder 6 are shown in FIGS. 5 (A) and 5 (B). The suction cylinder of the present example will be described below by referring to these figures together with FIG.

As shown in FIGS. 4 and 5B, an opening 61 is formed in the suction cylinder 6, and the opening 61 is formed.
The absorbers 18a to 18d of the recovery system 17 move to the outside of the cylinder 6 via the
It is possible to abut the discharge port surfaces 1a to 1601d.

A shutter 60 is housed inside the suction cylinder 6 along the inner peripheral surface thereof, and it moves during recording so that the opening 61 can be closed.
As a result, the cylinder 6 forms a cylindrical peripheral surface having no opening and no unevenness. The surface of the shutter 60 is the same insulating layer as the surface of the suction cylinder 6, and can be charged by the charging roller 51 to electrostatically adsorb the recording paper.

The shutter 60 is driven by driving a rack 60A attached to the end of the shutter 60 by a pinion 60c rotated by a motor (not shown), as shown schematically in FIG.

The rotation of the cylinder 6 is carried out by three cylinder driving rollers 50a, 50b, 50c provided along the circumference thereof, as shown in FIG. 5 (A).

FIGS. 6A and 6B are side views showing details of the recording head portion.

As shown in FIG. 6 (A), the head blade 22 is supported by a support 21, and is indicated by an arrow M in the figure.
It is configured to be movable in any direction. This allows the blade 2
2 projects out of the cylinder 6 through the opening 61 and can be engaged with the ejection port surface of each recording head. By rotating the cylinder 6 in this state, the blade 22 can wipe the discharge port surface.

In FIG. 6B, the head cap 30
a, 30b, 30c and 30d are the respective recording heads 1
601a to 1601d, which are provided corresponding to arrows Na, Nb, Nc. It is configured to be rotatable in the Nd direction. As a result, it is possible to cover the ejection port surface of each recording head with the head cap during non-recording.

Referring again to FIG. 4, the separation claw 23 is swingably provided by a drive mechanism (not shown), and the recording paper electrostatically attracted to the cylinder 6 can be peeled off by the conveying operation. Reference numeral 24 denotes a pair of paper discharge rollers. When the recording paper enters between these rollers, the leading edge of the recording paper is pressed against the guide by the guide fan 25 and becomes flat, so that the paper easily enters the paper discharge roller 24. ..

Reference numeral 26 is a supply tank for storing each ink of black, cyan, magenta, and yellow. Reference numeral 27 is an upper unit of the apparatus. As shown in FIG.
It can be released by rotating around.

The recording operation in the above configuration will be described below.
First, the recording paper in the cassette 1A or 1B is fed by the pickup roller 2A or 2B and the separation roller 3A or 3B, reaches the registration roller 4, and stops. In parallel with this, the caps 30a to 30d of the recording heads 1601a to 1601d rotate above Na to Nd in the drawing, respectively, and the recording heads 1601a to 1601d are ready for ejection. At this time, the opening 61 of the suction cylinder 6
Is closed by a shutter 60, and the suction cylinder 6
The surface of is a cylindrical surface without irregularities.

When continuously recording on a plurality of recording papers,
The suction cylinder 6 continues to rotate, and recording is continuously performed according to the conveyance timing of the registration roller 4.

As described above, by closing the opening 61 of the suction cylinder 6 with the shutter 60, the recording paper can be sucked and recorded in the same manner at any position of the suction cylinder 6, so that the opening is opened. The recording time can be shortened without the need to control the recording paper to be sucked by avoiding 61, and recording can be performed on the recording paper whose length is longer than the outer circumference of the suction cylinder. Become.

Next, the recovery operation will be described.

When the recovery operation is performed, first the shutter 60
Is retracted from the opening 61 of the suction cylinder 6 into the suction cylinder 6.

The suction cylinder 6 starts rotating in synchronization with the conveyance timing of the registration roller 4. Further, the ejection timing of each of the recording heads 1601a to 1601d is also determined in synchronization with this rotation.

The surface of the suction cylinder 6 is made of an insulating layer, and is charged by the charging roller 51 as the suction cylinder 6 rotates. As a result, the recording paper conveyed to the attraction roller 5 is electrostatically attracted to the attraction cylinder 6.

Then, the leading end portion of the recording paper on which images are sequentially formed by ink ejection from the recording head is engaged with the separating claw 23 rotated downward in the direction of arrow E in the figure, and the recording paper is peeled off from the suction cylinder 6. The paper is discharged to the outside of the apparatus by the paper discharge roller 24. At this time, the separation claw 23 is rotated upward in E in a state where the separation claw 23 is located a predetermined amount before the rear end of the recording paper.

After the recording paper is separated, the surface of the suction cylinder 6 is cleaned by the blade 11 and the absorber 7 while rotating.

Thereafter, the rotation shaft 29 of the swing cam 14 is indicated by B in the figure.
The recovery system 17 is lifted above the arrow F in FIG. As a result, the absorbers 18a to 18d of the recovery system 17 come into contact with the ejection port surfaces of the recording heads 1601a to 1601d, and in this state, ink is discharged by pressure circulation. Thereafter, the swing cam 14 is further rotated in the direction of the arrow B until the V-shaped position is reached, whereby the absorbers 18a to 18d slide downward in the arrow F and become separated from the surface of the recording head. ..

Next, the diaphragm mechanisms 19a to 19d rotate,
The ink absorbed and held by the absorbers 18a to 18d is squeezed out and discharged through the discharge tube 15. When this throttling is completed, the swing cam 14 is similarly rotated, the absorbers 18a to 18d are again lifted in the upward direction of F, come into contact with the ejection port surface of the recording head, and then are lowered in the downward direction of F. And the recovery operation ends.

Next, the unjamming of the recording paper will be described.

As shown in FIG. 7, when a release lever (not shown) is operated to rotate the upper unit 27 and the head holder 35 upward by a predetermined amount P about the crocodile fulcrum 28, the caps 30a ... 30d rotates downward in the directions of arrows Na, Nb, Nc, and Nd shown in FIG. 6 to cap the recording head. After that, after rotating the upper unit 27 in the upward direction by a predetermined amount P, the jam cancellation processing of the recording paper is performed.

As described above, the ink jet recording apparatus using the full line type recording head having the length corresponding to the recording paper width enables the image formation in a short time, and the cylindrical rotatable conveying means. By making the recording paper electrostatically attracted to the recording sheet, it is possible to prevent pitch unevenness, noise, white streaks, black streaks, etc., and it is effective in downsizing the apparatus. In addition to such general advantages, by providing an opening / closing shutter at the recovery opening provided in the suction cylinder, it is not necessary to control the relationship between the rotation of the suction cylinder and the position of the recording paper. Further, it is possible to record on a recording paper longer than the outer circumference of the suction cylinder.

In the ink jet recording apparatus having the same structure as that of the above-mentioned embodiment, the same structure as that of the above-mentioned embodiment is used even if the openings of the suction cylinders are provided at two positions facing each other. be able to.

Further, in the ink jet recording apparatus having the same constitution as that of the above-mentioned embodiment, the same effect as that of the above-mentioned embodiment can be obtained even if the ink is adsorbed by brush charging using a brush instead of the charging roller, charging using an electrode or the like. Is obtained.

Further, in the ink jet recording apparatus having the same structure as that of the above embodiment, the same effect as that of the embodiment can be obtained even if the separation claw is eliminated and the curvature is separated.

The present invention is particularly suitable for an apparatus using a full-line-tamped ink jet recording head as described above, but the recording paper is conveyed by the rotation of a cylindrical member having an opening in a part thereof. It will be apparent that the present invention is applicable to all recording devices that perform

Further, the cylindrical member is not limited to a fixed shape, but may be, for example, a belt-like member, which may rotate in a flat circular shape.

(Others) The present invention is particularly provided with means for generating thermal energy as energy used for ejecting ink (for example, an electrothermal converter or a laser beam) even in the ink jet recording system. The present invention provides excellent effects in a recording head and a recording apparatus of the type in which the thermal energy causes a change in ink state. This is because such a system can achieve high density recording and high definition recording.

Regarding its typical structure and principle, see, for example, US Pat. Nos. 4,723,129 and 4740.
What is done using the basic principles disclosed in 796 is preferred. This method is a so-called on-demand type,
Although it can be applied to any of the continuous type, particularly in the case of the on-demand type, it can be applied to an electrothermal converter arranged corresponding to a sheet or a liquid path holding a liquid (ink). By applying at least one drive signal corresponding to the recording information and giving a rapid temperature rise exceeding nucleate boiling, heat energy is generated in the electrothermal converter, and film boiling is caused on the heat acting surface of the recording head. Liquid (ink) corresponding to this drive signal in a one-to-one correspondence
This is effective because bubbles can be formed inside. The liquid (ink) is ejected through the ejection openings by the growth and contraction of the bubbles to form at least one droplet. It is more preferable to make this drive signal into a pulse shape, because the bubble growth and contraction are immediately and appropriately performed, so that the ejection of the liquid (ink) with excellent responsiveness 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 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, U.S. Pat. No. 4,558,333, U.S. Pat. No. 44, which discloses a configuration in which a heat acting portion is arranged in a bending region.
The configuration using the specification of No. 59600 is also included in the present invention. In addition, Japanese Unexamined Patent Publication No. 59-123670 discloses a configuration in which a common slit is used as a discharge portion of the electrothermal converter for a plurality of electrothermal converters, and an opening for absorbing a pressure wave of thermal energy is provided. The effect of the present invention is effective even if the configuration corresponding to the ejection portion is disclosed in Japanese Patent Laid-Open 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 a combination of a plurality of recording heads or a configuration as one recording head integrally formed.

In addition, even in the case of the serial type as in the above example, the recording head fixed to the main body of the apparatus or the electrical connection to the main body of the apparatus or the ink from the main body of the apparatus by being attached to the main body of the apparatus. The present invention is also effective when a replaceable chip-type recording head that can be supplied or a cartridge-type recording head in which an ink tank is integrally provided in the recording head itself is used.

Further, as the constitution of the recording apparatus of the present invention, it is preferable to add ejection recovery means of the recording head, preliminary auxiliary means and the like because the effects of the present invention can be further stabilized. Specifically, heating is performed by using a capping means, a cleaning means, a pressure or suction means for the recording head, an electrothermal converter or a heating element other than this, or a combination thereof. Examples thereof include a preliminary heating unit for performing the discharge and a preliminary discharge unit for performing discharge different from the recording.

Regarding the type or number of recording heads to be mounted, 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. A plurality of pieces may be provided. That is, for example, the recording mode of the recording apparatus is not limited to the recording mode of only the mainstream color such as black, but may be either integrally formed of the recording heads or a combination of a plurality of them. The present invention is also very effective for an apparatus provided with at least one of full-color recording modes by color mixing.

In addition, in the above-described embodiments of the present invention, the ink is described as a liquid, but an ink that solidifies at room temperature or lower and that softens or liquefies at room temperature may be used. Or, in the inkjet method, it is common to adjust the temperature of the ink itself within the range of 30 ° C. or higher and 70 ° C. or lower to control the temperature so that the viscosity of the ink is within the stable ejection range. At times, a liquid ink may be used. In addition, the temperature rise due to 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 in order to prevent the evaporation of the ink, it is solidified and heated in a standing state. You may use the ink liquefied by. In any case, by applying heat energy such as ink that is liquefied by applying heat energy according to the recording signal and liquid ink is ejected, or that begins to solidify when it reaches the recording medium. The present invention can be applied to the case where an ink having a property of being liquefied for the first time is used. In this case, the ink is
JP 54-56847 A or JP 60-7.
As described in Japanese Patent No. 1260, it may be configured to face the electrothermal converter in a state of being held as a liquid or a solid in the concave portion or the through hole of the porous sheet. In the present invention, the most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

In addition, as the form of the ink jet recording apparatus of the present invention, 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, and a facsimile apparatus having a transmission / reception function It may be in a form or the like.

[0074]

As is apparent from the above description, according to the present invention, at least at the time of recording, it is possible to close the opening provided on the traveling surface of the rotary conveying member by the shutter means. As a result, the recording medium does not interfere with the opening and the recording surface is not properly regulated. Therefore, it is not necessary to perform control in consideration of the rotational position of the opening and the color carrying timing of the recording medium.

As a result, the control structure is simplified, the cost of the entire apparatus can be prevented from increasing, and the recording speed can be increased.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an inkjet recording head in a partially cutaway manner.

FIG. 2 is a perspective view showing a configuration of a serial type inkjet recording apparatus.

FIG. 3 is a schematic diagram showing an ink circulation system of an inkjet recording apparatus using a full-line type recording head.

FIG. 4 is a side view of an inkjet recording apparatus showing an embodiment of the present invention.

5A and 5B are a horizontal cross-sectional view and a perspective view, respectively, of the suction cylinder shown in FIG.

6A and 6B are side views showing details of the recording head unit shown in FIG.

FIG. 7 is a side view of the inkjet recording apparatus shown in FIG. 4 for explaining unit separation.

[Explanation of symbols]

1 Recording Paper 2 Pickup Roller 3 Separation Roller 4 Registration Roller 5 Adsorption Roller 5 Adsorption Roller 6 Adsorption Cylinder 7 Cleaning Absorber 8 Cleaning Support 9 Stopper 11 Cleaning Blade 14 Swing Cam 15 Discharge Tube 17 Recovery System 18a, 18b, 18c, 18d Recovery Absorption Body 19a, 19b, 19c, 19d Throttle mechanism 23 Separation claw 24 Discharge roller 27 Upper unit 28 Vanillo fulcrum 29 Rotating shaft 30a, 30b, 30c, 30d Head cap 35 Head holder 50 Cylinder drive roller 51 Charging roller 60 Shutter 60A Rack 60C Pinion gear 61 Opening 1601a, 1601b, 1601c, 1601d Recording head

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location B41J 11/02 9011-2C 9012-2C B41J 3/04 103 B (72) Inventor Masatoshi Tsugai Tokyo 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Yasuyuki Takanaka 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc.

Claims (5)

[Claims] 1. A recording apparatus for recording on a conveyed recording medium, comprising: a recording head used for recording; and a member having an opening provided in a part of a surface traveling by rotation, said recording head comprising: A rotation conveying member that conveys the recording medium by a traveling surface and restricts a recording surface of the recording medium by the traveling surface that faces the recording head; and a rotation conveying member for closing the opening of the rotation conveying member. A recording device comprising: shutter means. 2. The rotary transport member has a cylindrical shape, the surface is the cylindrical peripheral surface, and further comprises means for adsorbing the recording medium to the peripheral surface. The recording device according to 1. 3. The recording apparatus according to claim 1, wherein the recording head ejects ink, and recording is performed by the ejected ink. 4. A recovery means for maintaining a good ejection state of the recording head is housed inside the rotary conveyance member, and the recovery means is movable relative to the recording head through the opening. The recording apparatus according to claim 3, wherein the recording apparatus is provided so as to be capable. 5. The recording apparatus according to claim 3, wherein the recording head uses the thermal energy to generate bubbles in the ink, and ejects the ink based on the generation of the bubbles.