JPH06255131A - Ink jet recording apparatus - Google Patents

Abstract

PURPOSE:To eliminate a platen and to fix an ink absorbing member to a frame by arranging the member pressing the ink absorbing member absorbing emitted ink in the vicinity of the end surface of a recording medium in the lateral direction thereof. CONSTITUTION:A shaving preventing metal fitting 29 has an almost inverted U-shape cross section so as to form an internal channel and is formed so that two press pieces 29b laterally protrude from the central part of the metal fitting 29. The press pieces 29b has function pressing an ink absorbing member 26 so as to prevent the slipping-out thereof and are positioned on the upper surface of the ink absorbing member 26 when the metal fitting 29 is incorporated in the recessed part 1a of a frame to press the ink absorbing member 26 from above. Since a hole 29a is engaged with a projection 1b, the metal fitting 29 is not easily detached from the frame. Therefore, even when cost reduction due to the elimination of a platen is achieved as compared with a conventional case pressing the ink absorbing member by the platen, the ink absorbing member 26 can be pressed without providing a separate part to be fixed to the frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording apparatus for recording by ejecting ink from a recording head onto a recording medium.

[0002]

2. Description of the Related Art Conventionally, word processors, printers,
Many recording devices equipped with a recording head have been developed and put into practical use as recording devices for calculators and the like. Among them, the inkjet recording device is a device for recording by ejecting ink from a recording means (recording head) onto a recording material, and can record a high-definition image at a high speed, and special treatment is applied to plain paper. It has advantages that it can be recorded without needing it, it is a non-impact system, it produces less noise, and that it is easy to record a color image using multicolor inks. Above all, a line type apparatus using a line type recording means in which a large number of ejection openings are arranged in the paper width direction can further speed up recording. In particular, a recording head of an inkjet recording apparatus that ejects ink by using thermal energy is an electrothermal converter, an electrode, a liquid path formed on a substrate through a semiconductor manufacturing process such as etching, vapor deposition, and sputtering. By forming the wall, the top plate, etc., it is possible to easily manufacture a device having a high-density liquid path arrangement (ejection opening arrangement).

In an ink jet recording apparatus, paper dust or dust adheres to the vicinity of the ejection port of the recording unit (recording head), the viscosity of the ink in the ejection port increases, or air is mixed into the ink in the recording unit. In some cases, ejection failure such as non-ejection of ink or deviation of ejection direction may occur, which may cause image defects such as dot loss and deviation.

Therefore, as a method of preventing such ejection failure, preliminary ejection is performed before the recording operation. This preliminary ejection is performed by setting the recording head at a predetermined position, ejecting a predetermined amount of ink, and absorbing the ejected ink with an ink absorber. Further, the position of the recording head and the installation position of the ink absorber during the preliminary ejection are often determined by the position control of the absorption head, and are generally selected at positions outside the recording area.

FIG. 20 is a plan view showing a constitutional example of a conventional ink jet recording apparatus, and recording can be carried out by the constitution described later. For a reason described below, an inkjet recording apparatus usually preliminarily ejects ink at a place not directly related to recording to recover ejection failure of an ink head. The ink 100 (see FIG. 21) ejected to the preliminary ejection portion 27, which is a part of the frame, is absorbed from the end portion 26a of the ink absorber 26 and spreads to the entire ink absorber 26. Reference numeral 28 indicates a scraping prevention metal member, and the scraping prevention metal member 28 prevents the inner wall 1d of the frame from being scraped by the end portion of the recording paper by bringing the end portion of the recording paper into contact with the inner wall surface 28h. Reference numeral 7 denotes a platen. The platen 7 not only regulates the position of the recording paper in the recording portion, but also presses the ink absorber 26 from above when the platen 7 is attached to the frame 1, so that the ink absorber 26 is I try not to get out of frame 1.

FIG. 21 is a perspective view showing a state in which the scraping prevention metal fitting 28 and the platen 7 are mounted. The anti-scraping metal fitting 28 is inserted in conformity with the recess 1a of the frame, and the protrusion 1b of the frame
Hole 28a for anti-scraping metal fitting (there is another on the opposite surface)
Fix it to the frame by engaging (there is another on the opposite surface). Next, by incorporating the platen 7 from above,
The ink absorber 26 is pressed from above and held / fixed to the frame 1. Reference numeral 1c indicates a projection for molding the projection 1b by upper and lower die cutting, and reference numeral 1e indicates a hole for passing the feed roller 8.

[0007]

The platen 7 is the next largest component after the frame 1, and its manufacturing cost is the highest among the components of the recording apparatus. However, in the conventional example, the specification (patent application No.
When the platen 7 is integrated with the printer lid and the cost is reduced by discharging the paper from the recording apparatus by the method described in No. 1), the ink absorber 26 is attached to the frame 1.
Since there are no parts to be fixed to the ink absorber 26, the ink absorber 26 comes off the frame 1. Further, even if the ink absorber pressing member is other than the platen, cost reduction cannot be achieved by eliminating the member.

[0008]

According to the present invention, the plate absorber is eliminated by partially deforming the shape of the metal fitting for preventing the frame from being scraped by the edge of the recording paper and pressing the ink absorber. It is possible to fix the ink absorber to the frame while downsizing.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Before describing a specific embodiment of the present invention (structure of metal fittings for pushing an ink absorber), the entire ink jet recording apparatus of the present invention will be described with reference to FIGS. 2 and 7 to 10. The configuration will be described in advance. 2 is a plan view of the ink jet recording apparatus, FIG. 7 is a right side view,
FIG. 8 is a left side view.

In the figure, reference numeral 1 indicates a base frame forming the main body of the apparatus, and a carriage 3 carrying a recording head 2 constituting a recording means is movable with respect to the frame 1 in the directions of arrows P and Q in FIG. Is attached to.
The recording head 2 in the present embodiment uses an inkjet recording system in which ink is ejected from an ink ejection port by applying energy in accordance with a recording signal. Among them, the energy used to eject ink is used. Is provided with a means for generating heat energy (for example, an electrothermal converter or a laser beam), and the one that causes a change in the state of the ink by this heat energy is used. This is because according to this method, high density recording and high definition recording can be achieved.

Reference numeral 4 is a hole 3a formed in the carriage 3.
The set lever 4 is rotatably attached about the center of the set head 4. The set lever 4 is a member for press-contacting and fixing to a flexible cable 6 for connecting the recording head 2 to a drive circuit board (not shown).

The carriage 3 is a base frame 1
It is supported by two sliding shafts 5a and 5b fixed to FIG.
It is configured to be slidable in the directions of arrows P and Q. The carriage 3 has a single groove 13b (see FIG. 11) formed on the screw 13, which is a rotating body described later.
1) and the rotational movement of the screw 13 is shown in FIG.
A protruding pin 22 (see FIG. 7) for converting into a linear movement in the directions of arrows P and Q is fixed.

A feed roller 8 for feeding a recording sheet is rotatably supported by a base frame 1 and a right side plate 10, and a gear portion 8a is formed at a predetermined position. A rubber ring 9 is attached to the center of the feed roller 8a, and a pinch roller 23 is provided below each rubber ring 9 so as to face each other. The pinch roller 23 is started by an unillustrated shaft having a spring property. To apply pressure to the rubber ring 9. The recording sheet is inserted between the rubber ring 9 and the pinch roller 23, and is conveyed according to the rotation amount of the feed roller 8.

FIG. 7 shows the right side surface from which the above-mentioned right side plate 10 is removed. In FIG. 7, reference numeral 11 denotes a main gear which is a first rotating member, and the main gear 11 is a shaft 12
The shaft 12 is rotatably supported by the base frame 1.

Reference numeral 14 denotes a reversing gear which is a second rotating member, and is rotatably supported by a shaft protruding from the base frame 1. Reference numeral 13 denotes a screw, and a gear portion 13a which is a third rotating member is integrally formed at the right end portion thereof.

The reversing gear 14 and the screw gear 13a are always in mesh with each other, but the main gear 11 and the reversing gear 14 are in mesh with each other.
Alternatively, the screw gear 13a is configured to intermittently transmit power by a mechanism described later.

FIG. 9 shows a side surface excluding the left side plate 16 in FIG. 8. Reference numeral 15 denotes a DC motor as a drive source, and a worm gear 21 is press-fitted and fixed to the motor shaft. The worm gear 21 has a disc-shaped encoder slit 21a integrally formed at the tip thereof.
It enters into the concave groove of the ejection signal detector 19. Again 17
Indicates a wheel gear, which is fixed to the main gear 11 and is always in mesh with the worm gear 21.

The ejection signal detector 19 is a transmissive photo detector and is provided on the PCB 18. At the same time, a recording start signal detector 24 (transmissive photo detector) which will be described later is also provided on the PCB 18. ing. 20 is the PC
The flat cable which connects B18 and a drive circuit which is not illustrated is shown.

(Power Transmission System for Driving Carriage) Next, a power transmission system for reciprocating the carriage 3 will be described. FIG. 11 is a perspective view schematically showing a power transmission system relating to the reciprocating drive of the carriage, and the DC motor 15 always rotates in one direction when energized. As a result, the wheel gear 17 always rotates in the arrow J direction in FIG. 11 via the worm gear 21, and the main gear 11 also rotates in the J direction via the shaft 12.

As described above, when the power of the main gear 11, which is constantly driven to rotate in the J direction, is transmitted directly from the main gear 11 to the screw gear 13a by the mechanism described later, the screw 13 moves in the direction of arrow K in FIG. The carriage 3 moves in the direction of arrow P at this time.

On the other hand, when power is transmitted from the main gear 11 to the reversing gear 14, since the reversing gear 14 and the screw gear 13a are always meshed with each other as described above, the reversing gear 14 moves in the direction of arrow L in the figure. As a result, the screw 13 rotates in the direction of arrow M in the figure, and the carriage 3 moves in the direction of arrow Q at this time.

Next, the shapes of the main gear 11, the reversing gear 14, and the screw gear 13a will be specifically described with reference to FIGS. FIG. 12 is an explanatory view of the main gear 11. The gear 11 is divided into three facing portions, namely, a facing portion with the reversing gear 14, a facing portion with the screw gear 13a, and a facing portion with the feed roller gear 8a. First,
The portion facing the screw gear 13a includes a gear portion 31 and cam portions 30 and 32 at both ends thereof. The number of teeth of the gear portion 31 is set to 18 teeth in this embodiment, but this value is determined by the number of teeth of the reversing gear 14 and the screw gear 13a and how many times the screw 13 is driven to rotate.

Next, a portion facing the reversing gear 14 is similarly composed of a gear portion 34 and cam portions 33 and 35 at both ends thereof,
It is set to have the same shape as the facing portion of the screw gear 13a, and the difference is that the cams 33 and 35 are provided at each end, that is, the toothless portion of the reversing gear 14 to the screw gear 13a described later. (40 in FIGS. 13 and 14
Alternatively, it is provided in the opposite I of 42). still,
The portion facing the feed roller gear 8a will be described later.

FIG. 4 is a side sectional view of the cap portion,
13A and 13B are explanatory views of the reversing gear 14. It is composed of a full-circumferential tooth portion 38 having full-circumferential teeth and a toothed portion 39 having a partially missing tooth portion (3 teeth) 40. As mentioned above, the toothless portion 4
0 is in the opposite I to the cam portions 33 and 35 of the main gear 11. Further, the teeth of the entire-circumferential tooth portion 38 and the toothed portion 39 are set out of phase with each other by a half tooth a in the rotational direction.

14A and 14B show the screw gear 13
It is explanatory drawing of a. 14B is a cross-sectional view taken along the line AA of FIG. 14A. Similar to the reversing gear, partially missing teeth (3 teeth)
It is composed of a toothed portion 41 having 42. The toothless portion 42 is provided at I facing the cam portions 32 and 30 of the main gear 11.

Next, a specific operation will be described with reference to FIG. 15A to 15D are explanatory diagrams below, which are limited to the movement of the reversing gear 14 of the main gear 11 in order to facilitate understanding of the operation. In FIG. 15A, the cam portion 35 of the main gear 11 enters the toothless portion 40 of the reversing gear 14. However, the rotational force is not yet transmitted to the reversing gear 14 at this time, and the main gear 1
Even when 1 rotates in the direction of arrow J, the reversing gear 14 is stopped. Next, when the main gear 11 further rotates in the direction of arrow J, the teeth 34a provided on the main gear 11 mesh with the teeth 14a of the reversing gear 14 as shown in FIG. 15B, and the reversing gear 14 moves in the direction of arrow L in the figure. It is driven to rotate.

In FIG. 15C, the reversing gear 14 is still indicated by the arrow L.
It is driven to rotate in the direction. Then, as described above, when the teeth of the main gear 11 are set so that the tooth portions 34b are meshed with each other, as shown in FIG. 15D, after the reversing gear 14 makes one rotation, the cam portion 33 enters the toothless portion 40 and the reversing gear 14 rotates. Stop and lock. The same operation is performed in the mutual transmission operation between the screw gear facing portion of the main gear 11 and the screw gear 13a.

Further, since the toothed portion 38 (see FIG. 13) of the reversing gear 14 and the screw gear 13a are constantly in mesh with each other, one rotation of the reversing gear 14 is operated only once.
The screw gear 13 is rotated once by being transmitted to a.

Here, the facing portion of the main gear 11 facing the reversing gear 14 and the facing portion of the screw gear 13a are set to be substantially 180 ° out of phase with each other as shown in FIG. Actually, for 180 °,
As shown in FIG. 6, the phase is further deviated by an angle θ from the position of the reversing gear 14 and the screw gear 13a to the center of the main gear 11). In the state of FIG. The positional relationship with the gear 13a is in the state of FIG. 15A.

However, in FIG. 11, (1) when the main gear 11 rotates 0 ° to 180 °, the reversing gear 14 makes one rotation in the direction of arrow L, and the screw gear 13a moves in the direction of arrow M through this reversing gear 14. Make one revolution. (2) When the main gear 11 rotates 180 ° to 360 °, the screw gear 13a makes one rotation in the arrow K direction, and the reversing gear 14 makes one rotation in the arrow N direction via the screw gear 13a.

When the state is switched to (1) → (2) →, (2) → (1), the cam portions 32 and 35 are accurately aligned with the tooth portions of the reversing gear 14 and the screw gear 13a. When inserted, the cam portions 30 and 33 enter the toothless portions to fix the gears.

(Recording Sheet Conveyance Transmission System) Next, the recording sheet conveyance transmission system will be described. In the recording sheet conveying operation, the tooth portions 36 and 37 formed on the main gear 11 shown in FIG. 12 intermittently rotate the gear portion 8a of the feed roller 8 as the main gear 11 rotates. Made in. The tooth portions 36 and 37 are out of phase with each other by 180 °, and are set so as to be formed in a region where the carriage 3 is located on both sides by the screw 13 and in a region that does not affect the recording operation of the recording head 2. There is.

Next, the recording operation in this embodiment will be described. Note that FIG. 17 is a block diagram showing the configuration of the peripheral portion of the recording apparatus according to the present embodiment. The CPU 50, the keyboard 51, the display unit 52, the power supply unit 53, the motor drive circuit 54, the recording head drive circuit 55, the recording It is constituted by the device 56. The signals input from the recording device 56 to the CPU 50 include the ejection position detection signal output from the ejection signal detector 19 and the recording start signal detector 24.
There are two types of ejection start position detection signals output from

When a voltage is applied to the DC motor 15 to start it, a discharge position detection signal is generated by the encoder slit disk 21a formed integrally with the worm gear 21. This signal is set to be generated in a one-to-one correspondence with each dot row in the dot matrix.

Next, due to the mutual operation of the main gear 11, the reversing gear 14 and the screw gear 13a, the carriage 3 rotates the encoder plate 25 fixed to the end of the screw 13 in the direction of arrow P from the right end position in FIG. Then
The slits 25a and 25b formed on the disk portion generate a recording start position signal.

The CPU 50 receives the ejection position start signal and, at the same time, selectively outputs a recording signal in synchronization with the ejection position detection signal, thereby performing recording in the direction of arrow P in FIG. Then, when the recording in the P direction is completed, the CPU 50 counts the number of pulses of the ejection position detection signal, and turns off the energization of the motor 15 after N pulses. At this time, the recording sheet conveying operation has already been completed as described above, and the carriage 3 stops at the left end of FIG. The above timing chart is shown in FIG.

Next, when the motor 15 is started again, the screw 13 reversely rotates due to the above-described reversing mechanism of the screw 13, and the carriage 3 starts moving from the left end of FIG. 2 in the arrow Q direction. An ejection position detection signal is generated at the same time when the motor 15 is activated, and a recording signal is selectively output from the CPU 50 in synchronization with the ejection position detection signal.
Recording is made in the direction.

When the recording in the direction of the arrow Q is completed as described above, the CPU 50 counts the number of pulses of the ejection position detection signal, and turns off the energization of the motor 15 after M pulses. At this time, as described above, the recording sheet conveying operation is also completed, and the carriage 3 stops at the right end portion in FIG. The above timing chart is shown in FIG.

Recording is performed on the recording sheet by repeating the above-described operation. Further, the CPU 50 needs to determine in advance whether the carriage 3 is located at the left end portion or the right end portion. As a method for that, for example, when the system is powered on or a specific key (all clear key or the like) is used. ) The motor 15 is energized when is pressed. Then, as shown in FIG. 18 or FIG. 19, the shape of the encoder plate 25 is set so that the ejection start position detection signals generate different signals in the arrow P and Q directions. The CPU 50 determines that it is moving in the P direction and in the Q direction if the Y → X type.

The difference between the encoder pulses X and Y can be accurately determined by counting the number of pulses of the ejection position detection signal during that time, even if the rotation speed of the motor 15 is different. Further, the number of pulses from the end of recording in the P direction and the Q direction until the driving of the motor 15 is stopped is N and M, respectively, but these pulse numbers are basically set to the same value. However, a slight difference may be made due to a difference in load or the like.

(Embodiment 1) Next, an embodiment of the present invention will be described. In FIG. 1, reference numeral 29 designates a scraping preventing metal member for preventing scraping of the inner wall 1d of the frame from the end portion of the recording paper. As is clear from FIG. 1, the metal fitting 29 has a substantially U-shaped cross section so as to form a channel (groove) inside, and two pressing pieces 29b are formed to project laterally from the central portion. Has been done. This pressing piece 29b is for pressing the ink absorber so as not to come out, and when the anti-scraping metal fitting 29 is incorporated in the frame recess 1a, it is located on the upper surface of the ink absorber and can be pushed from above. Further, since the hole 29a engages with the protrusion 1b, the abrasion preventive metal fitting is not easily displaced from the frame. Therefore, compared to the case where the platen 7 is used to press the ink absorber, even if the platen 7 is eliminated to reduce the cost, according to the present embodiment, the ink absorber can be installed without providing a separate component for pressing the ink absorber. It becomes possible to press and fix to the frame. Even if the platen does not press the ink absorber, it goes without saying that according to the present embodiment, it is not necessary to newly provide a component that presses the ink absorber.

In the ink jet recording apparatus, preliminary ejection for ejecting ink from the ejection port is performed before the recording operation in order to recover the ejection failure of the recording head. The preliminary ejection is performed by setting the recording head at a predetermined position and ejecting a predetermined amount of ink before performing a recording operation, thereby eliminating ink sticking or viscosity increase at the ejection opening portion, or bubble mixing. The purpose of the present invention is to eliminate the cause of defective recording such as dot loss and dot deviation during image formation. This preliminary ejection is performed when the recording device is powered on.
Alternatively, it is often performed after a certain period of time with the power turned on and before the first recording. Further, this preliminary ejection is performed by a method of directly or indirectly absorbing the ink by an ink absorber provided at a predetermined position of the recording apparatus. Therefore, the ink absorber in the ink jet recording apparatus is one of the important parts, and the effect of the present embodiment, which enables the ink absorber to be fixed while reducing the cost, is great.

Referring again to FIG. 2, the platen is abolished, and the ink absorber pressing piece 29b is used to replace the ink absorber 29.
You can see how you are holding down. Further, FIG. 3 shows the shape of the anti-scraping metal fitting shown in FIG. 1 by trigonometry.

(Second Embodiment) FIG. 4 shows a second embodiment according to the present invention. The widths of the holes that engage with the protrusions of the frame are different between 29a and 29c, and the widths of the protrusions corresponding to the holes are different according to the width of the holes. The anti-scraping metal fitting 29 of this embodiment is not intended for the ink absorber side of the recording paper side, and therefore should not be mounted in reverse. In this embodiment, since a wide projection is not required for the narrow hole, it cannot be assembled in the opposite way.

(Third Embodiment) By providing the C surface 29d at the corner of the tip of the scraping prevention metal fitting in the insertion direction with respect to the frame, the tip can be supplemented and the assembling property by insertion is improved.

(Embodiment 4) The ink absorber pressing piece 29b is provided with a pressure contact portion 29e which is bent into an R shape in the direction in which it projects toward the ink absorber. When assembled in the frame, the pressing piece 29e is bent by the amount of protrusion of the press contact portion 29e, and an elastic force is generated. This elastic force can press the ink absorber, so that the ink absorber can be more reliably formed. It becomes possible to fix.

Further, although the ink jet recording system is used as the recording means in the above-mentioned embodiment, the electrothermal converter is energized in response to a recording signal, and bubbles are generated by heating beyond the film boiling by the electrothermal converter. More preferably, the ink is ejected from the ejection port to perform recording.

Regarding the typical structure and principle thereof, 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 can be applied to both so-called on-demand type and continuous type,
In particular, in the case of the on-demand type, the electrothermal converter arranged corresponding to the sheet or liquid path holding the liquid (ink) corresponds to the recorded information and rapidly exceeds the nucleate boiling. By applying at least one drive signal that gives rise to a temperature rise, the electrothermal converter is forced to generate thermal energy, causing film boiling on the heat-acting surface of the recording head, resulting in a pair of drive signals. This is effective because it is possible to form bubbles in the corresponding liquid with one. The growth of this bubble,
The contraction causes the liquid to be ejected through the ejection opening to form at least one droplet. With this drive signal pulse shape, the growth and contraction of bubbles are immediately and appropriately performed.
Particularly excellent discharge of the liquid can be achieved, which is more preferable.

As the pulse-shaped drive signal, those described in US Pat. Nos. 4,463,359 and 4,345,262 are suitable. still,
Further excellent recording can be performed by adopting the conditions described in Japanese Patent No. 4313124, which is an invention relating to the temperature rise rate of the heat acting surface.

As the constitution of the recording head, in addition to the combination constitution of the discharge 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. Nos. 4,558,333 and 4,445,960 which disclose a configuration in which a heat acting portion is arranged in a bending region.
The configuration using the specification No. 0 is also included in the present invention.

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. 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 discharge portion is associated with the discharge portion, is effective. That is, according to the present invention, recording can be surely and efficiently performed regardless of the form of the recording head.

In addition, even in the case of the serial type described above, when it is mounted on the recording head fixed to the carriage or the carriage, it is possible to electrically connect to the apparatus main body and supply the ink from the apparatus main body. 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 load a recovery means for the recording head, a preliminary auxiliary means, etc. 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 capping means for the recording head, cleaning means, pressure or suction means, electrothermal conversion type or other heating element or preheating means by a combination of these,
It is also effective to perform stable recording by performing a preliminary discharge mode in which discharge is performed separately from recording.

Regarding the type and 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 any combination of a plurality of recording heads integrally formed, but a different return color or a full-color mixture of colors. It is also applicable to a device provided with at least one of the above.

In addition, in the above-described embodiments, the ink is described as a liquid, but 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. Ink itself 3
In general, the temperature is controlled within the range of 0 ° C. or higher and 70 ° C. or lower to control the temperature of the ink so that the viscosity of the ink 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 the solid state to the liquid state, or to use ink that solidifies when left standing for the purpose of preventing ink evaporation. In any case, the ink is liquefied by applying heat energy according to the recording signal,
It is also applicable to the case of using an ink which has a property of being liquefied for the first time by thermal energy, such as one in which liquid ink is ejected or one which has already started to solidify when it reaches a recording sheet.

The ink in such a case is disclosed in JP-A-54-54.
As described in JP-A-56847 or JP-A-60-71260, the liquid crotch is held as a solid in the recessed portion or through-hole of the porous sheet and faces the electrothermal converter. It may be in the form. 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 device, in addition to the form used as an image output terminal of an information processing device such as a computer, a form of a copying device combined with a reader or the like, and a form of a facsimile device having a transmitting / receiving function. It may be something to take.

The recording means is not necessarily limited to the ink jet recording method described above, and various recording method such as wire dot recording method and thermal recording method can be used.

[0059]

As described above, according to the present invention, the platen, which is expensive to hold down the ink absorber, can be eliminated and the ink absorber can be held securely while reducing the cost. Needless to say, even if a component for pressing the ink absorber is separately used, the cost can be reduced by deleting the component. Further, by making only one combination of the plurality of engaging holes with respect to the protrusion, misassembly can be prevented, and by giving the ink absorber pressing piece an elastic shape, the ink absorber can be pressed more reliably. become.

[0060]

[Brief description of drawings]

FIG. 1 is an assembly diagram of a first embodiment according to the present invention.

FIG. 2 is a clear view of the first embodiment according to the present invention.

FIG. 3 is a triangular drawing of Embodiment 1 according to the present invention.

FIG. 4 is a triangular drawing of Embodiment 2 according to the present invention.

FIG. 5 is a triangular drawing of Embodiment 3 according to the present invention.

FIG. 6 is a triangular drawing of Embodiment 4 according to the present invention.

FIG. 7 is a right side view of the recording apparatus.

FIG. 8 is a left side view of the recording apparatus.

FIG. 9 is a left side view of the recording apparatus with a side plate removed.

FIG. 10 is a front view of the recording apparatus.

FIG. 11 is an explanatory diagram of a carriage drive system.

FIG. 12 is an explanatory diagram of a main gear.

FIG. 13 is an explanatory diagram of a reversing gear.

FIG. 14 is an explanatory diagram of a screw gear.

FIG. 15 is an explanatory diagram of engagement and disengagement of a main gear and a reversing gear.

FIG. 16 is an explanatory diagram of a relationship between a main gear, a reversing gear, and a screw gear.

FIG. 17 is a block diagram around a recording device.

FIG. 18 is a timing chart of recording sheet conveyance when the carriage is moved in one direction.

FIG. 19 is a timing chart of recording sheet conveyance when the carriage is moved in the other direction.

FIG. 20 is a plan view of a conventional example.

FIG. 21 is an assembly diagram of a conventional example.

[Explanation of symbols]

 1 frame 2 carriage 26 ink absorber 29 scraping prevention metal fittings

Claims (8)

[Claims] 1. An ink jet recording apparatus for recording by ejecting a recording medium ink from a recording means for recording, at least having metal fittings arranged or in contact with an end face in the width direction of the recording medium to absorb ejected ink. An ink jet recording apparatus characterized in that the metal fitting also serves as a member for pressing a body. 2. The ink jet recording apparatus according to claim 1, wherein the metal fitting has a hole portion that engages with a protrusion on a frame of the ink jet recording apparatus. 3. The metal fitting has a plurality of holes that engage with the protrusions of the frame of the inkjet recording apparatus, and the combination of the plurality of holes and the protrusions is one. Inkjet recording device. 4. The ink jet recording apparatus according to claim 1, wherein the metal fitting has an elastic shape portion, and the elastic shape portion presses the ink absorber. 5. The metal fitting has a substantially U-shaped cross section so as to form a channel with the inside, and at least one pressing piece projects laterally from the central portion thereof, and the metal fitting has a frame in the channel. The ink jet recording apparatus according to any one of claims 1 to 4, wherein the ink absorber is fixed so as to press the ink absorber with the pressing piece being received. 6. The inkjet recording apparatus according to claim 1, wherein the inkjet recording apparatus is an inkjet recording system in which a recording unit ejects ink in accordance with a signal to perform recording. 7. The inkjet recording apparatus is an inkjet recording system in which a recording unit energizes an electrothermal converter in response to a signal and ejects ink by utilizing thermal energy of the electrothermal converter for recording. The inkjet recording device according to claim 6. 8. The ink jet recording apparatus ejects ink from an ejection port by recording means energizing an electrothermal converter in response to a signal and growing a bubble caused by heating beyond film boiling by the thermal converter. The inkjet recording apparatus according to claim 7, which is an inkjet recording method for performing recording by recording.