JP2672345B2 - Ink jet recording device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inkjet recording apparatus, and more particularly to an inkjet recording apparatus including a recovery system for causing a recording head to perform a stable ink ejection operation.

[Prior Art] In a conventional ink jet recording apparatus, when ink ejection failure occurs or may occur in an ink ejection section of a recording head, a cap member is pressed against the ink ejection section, and a cap member is pressed between them. A closed space is formed so that the ink is forcibly sucked from the ink ejecting portion to the cap member side to remove dust and adhesive ink around the ink and recover the clogging of the ejection port.

By the way, after such recovery operation, if the ink adheres to the ink ejection surface, and the ink ejection force from the ejection portion is weaker than the surface tension of the adhered ink, then the ink may not be ejected. Since the ejection phenomenon occurs, it is necessary to wipe off the adhered ink. So, conventionally,
As shown in FIG. 11, it can be located at a position slightly forward of the cap member 70, that is, at a position just to the right of the cap member 70 with respect to the carriage 72 that carries the recording head 1 and reciprocates along the guide shaft 71. The flexible wiping plate 73 was held by the holding member 74. Reference numeral 75 is a cap holder, and 8 is a side plate of the case to which a holding member is attached.

In the recovery system configured as described above, first, the cap member 70 is brought into pressure contact with the ejection portion 1A of the recording head 1 which has been guided to the facing position, and the ejection portion 1A is ejected by suction means (not shown).
When the carriage 72 is moved to the right after the ink suction operation is performed, the front end portion of the wiping plate 73 wipes the ink ejection portion 1A of the recording head 1 and wipes the attached ink. You can leave.

[Problems to be Solved by the Invention] However, in such a conventional recovery system wiping plate 73, the ink wiped by the wiping plate 73 having a substantially rectangular shape gradually advances to the leading edge as shown in FIG. It hangs down near the lower end of the ink and becomes a large ink drop 76. So after that,
When wiping by the wiping plate 73, the flexible wiping plate 73 immediately after the wiping attempts to return to this state, rebounds,
At this time, ink droplets 76 are scattered all around.

For this reason, the recording sheet is soiled with the scattered ink,
The ink may be again attached to the ink ejection surface of the recording head 1, which is not preferable.

An object of the present invention is to pay attention to the above-mentioned conventional problem, and in order to solve the problem, an ink capable of spraying air after the ejection operation for ink recovery or the like to eject the ink from the ejection surface in a non-contact manner. An object of the present invention is to provide an inkjet recording device having a scavenging means.

[Means for Solving the Problems] In order to achieve such an object, the present invention provides a recording area and a recording area of a recording sheet on which a recording head having an ejection portion for ejecting ink is mounted and which is arranged to face the ejection portion. When the ejection unit is capped by a carriage that moves in the recovery processing region of the recording head and a cap that is arranged in the recovery processing region and that caps the ejection unit of the recording head, suction is performed to the ejection unit through the cap. It has a suction pump for performing an operation and a pressure chamber for ejecting air when a driving piece provided on the carriage is engaged, and when the carriage moves and the ejection portion of the recording head is arranged to face each other, a recovery processing area And an air pump for sending air from the pressure chamber to an air nozzle for ejecting air to the discharge part and a key in the recovery processing area. The suction pump is provided between the position where the cap is arranged and the position where the air nozzle is arranged, and has a wiping body for wiping the ejection portion of the recording head when the carriage is arranged to face each other. After the suction operation is performed on the ejection section by the, the cleaning section wipes the ejection section of the recording head, and air from the pressure chamber is pumped to the air nozzle by the air pump and air is ejected to the ejection section. It is characterized by being injected.

[Operation] According to the present invention, after the suction operation is performed on the ejection portion by the suction pump, the wiping member performs the wiping operation on the ejection portion of the recording head, and the air pump causes the air nozzle to move from the pressure chamber. Since the air is pumped and the air is ejected to the ejection portion, ink, dust and the like attached to the ejection portion can be efficiently removed.

In addition, since the cap, the wiping body, and the air nozzle are arranged corresponding to the work order shared in the recovery processing area, the recovery processing mechanism and the recovery processing procedure are rationally arranged, and Thus, the recovery process will be executed efficiently.

[Example] Hereinafter, an example of the present invention will be described in detail and specifically with reference to the drawings.

FIG. 1 shows an embodiment of the present invention. Here, 1 is a recording head, 2 is a recording head 1, and a carriage that travels along a carriage guide shaft 3 by driving means (not shown) and 4 is a recording held by a platen (not shown) capable of feeding a sheet. A sheet 5 is an ink cartridge for supplying ink to the recording head 1 through an ink supply tube 6, 7 is an ink outlet of the ink cartridge 5, 8 is a case side plate of the recording apparatus main body, and 9 is a base fixed to the case. is there.

Further, the present example includes a recovery system for stabilizing the ejection of ink droplets, and as described later, by capping the ejection portion 1A of the recording head 1, a small recovery operation, a large recovery operation and a scavenging means. Ink or the like can be blown off from the ejection portion 1A. The configuration of the recovery system will be described with reference to FIG. 1 and FIGS. In these figures, 10 is a cam plate having a cam surface 10A formed on its front surface, and the cam field 10 is locked between the side plate 8 and the base 9 and is attached to the cap member 11 as described later. It is involved in the operation of adhering to the ejection portion 1A of the recording head 1 or capping it.

That is, as shown in FIG. 2, the cap member 11 includes a cap 12 containing a polymer absorber 12A capable of absorbing ink, a cap holder 13 holding the cap 12, and the cap holder 13 together with the cap 12 parallel to the paper surface. Holder support 14 that holds it so that it can move in parallel directions, cap holder
13 has a spring 15 interposed between the holder support 14 and
The spring 15 allows the cap 12 to be brought into close contact with the recording head ejection portion 1A while maintaining an appropriate pressure contact force, for example, about 300 g. Reference numeral 16 is an E ring provided on the spring guide shaft 13A.

Reference numeral 17 is a slider that holds the cap member 11 and can move along the cap guide shaft 18 shown in FIG. 3. In a normal standby state, the slider 17 moves to the right by the spring force of a spring 19 provided around the guide shaft 18. The first protruding arm of the slider 17 is biased by the
17A is kept in contact with the stopper 8A of the side plate.
Further, a protrusion pin 14A is provided so as to project from the holder support 14 to the upper portion, and as shown in FIG.
The cap member 11 is biased toward the cam surface 10A through the pin 14A by the spring force of the spring 20 that is locked between the locking pin 10B and the locking pin 10B.

Furthermore, 17B is a second projecting arm projecting forward from the slider 17, that is, toward the recording head side.
The protruding arm 17B contacts the side portion 1B of the recording head 1 when the carriage 2 moves to the left in FIG.
The whole can be moved to the left, the cap member 11 can be moved along the cam surface 10A along with the movement, and the cap 12 can be brought into pressure contact with the recording head ejection portion 1A.

Furthermore, in FIG. 3, reference numeral 21 is an air valve protruding from the gap 12, and the air valve 21 has an atmosphere communication passage 22 and a large recovery passage 23 as shown in FIG. One end is open to the atmosphere. 22A is an opening thereof, and 22B and 23B are an atmosphere communication hole and a large recovery ink hole opened in the cavity of the cap 12. The third
FIG. 4 and FIG. 4 show a state in which the slider 17 is guided to a position where it comes into pressure contact with the recording head 1 together with the cap member 12. In this state, the opening 22A of the air valve 21 is projected from the base 9 side. The atmosphere communication path 22 is kept in contact with the stopper 25 so as to be closed. Also shown in FIG.
26 is the contact force of the stopper 25 with the air valve 21 (in the case of this example, approx.
It is a spring for giving 120g).

Furthermore, in FIG. 3, 30 is a slider supported by the cap guide shaft 18, 31 is a wiping body holder (see FIG. 5) for movably holding the wiping body 32, and the wiping body 32 is It is formed of a porous body, for example, an ether polyurethane continuous pore body, and is allowed to move in the direction of the arrow shown in FIG. Reference numeral 33 is a spring that biases the wiper body 32 to the right via the holder 31, and in this example, the spring 33 is designed to obtain a pressure contact force of about 100 g. Reference numeral 30A denotes a flexible leg extending downward from the slider 30, and the lower end of the flexible leg 30A is supported by the support portion 8B of the side plate 8.

Reference numeral 40 denotes a wiping member drive cam (hereinafter referred to as a wiping cam), and the wiping cam 40 is provided on a cam shaft 41 driven by a sheet feeding drive means described later in detail. Therefore, during a series of recovery operations, the wiping cam 40 driven via the cam shaft 41 moves the protruding portion 30B of the slider 30 to the right by the large diameter portion 40A thereof to cause the recording head ejection portion 1A to be wiped. be able to. Further, the wiping is performed at the rotation timing of the cam shaft 41 which will be described later, and when the wiping is completed, the small diameter portion 40B and the protruding portion 30B are rotated by the rotation of the wiping cam 40.
Are released and the slider 30 moves to the fifth position due to the elasticity of the flexible leg 30A.
It returns to the state shown in the figure.

Referring back to FIG. 1 again, reference numeral 35 is an air spray nozzle attached to the side plate 8 via a holder 36. The air blowing nozzle 35 is connected to an air pump 38 by an air tube 37, and the tip of the nozzle 35 is always kept in a state of protruding from an obliquely upper direction toward the ejection portion 1A of the recording head 1, so that recording is performed. Each time the head 1 passes this position, air can be ejected from the nozzle 35, and the ink adhering to the ejection portion 1A can be blown down by the air flow.

That is, the main body of the air pump 38 is formed of a thin elastic body, for example, rubber, and has an air intake pipe 38B with a check valve 38A, an air outlet 38C, and a pressure contact portion 38D that can be pushed down at the top of the main body. . On the other hand, a pump driving piece 2C is provided on the lower surface of the carriage 2 so as to project therefrom.
When the discharge part 1A is guided to the vicinity of the facing position of the nozzle 35, the pump drive piece 2C comes into contact with the pressure contact part 38D of the air pump 38 and presses it down.

Therefore, in the scavenging means by air blowing configured as described above, the carriage 2 is operated before and after the blank discharge performed at a predetermined recording time or at a predetermined recording amount, and before and after the large recovery and the small recovery. When passing in front of the air blowing nozzle 35, the pump driving piece 2C of the carriage 2
The air pump 38 is driven by, and the check valve 38A is closed by pressing the pressure contact portion 38D of the pump 38, and air is sent out toward the nozzle 35 via the air discharge port 38C and jetted. It

FIG. 6 shows a state in which the recording head 1 is guided to a position facing the air blowing nozzle 35. That is, in the case of this example, in the recording head 1, the ejection surface 1C of the ejection portion 1A is formed in a concave shape, and the ink absorber 39 is provided below the ejection surface 1C. Therefore, every time the recording head 1 is guided to such a position by the carriage 2, air is ejected from the nozzle 35 fixed obliquely downward to the concave ink ejection surface 1C, and the air is ejected. Flows downward along the concave portion of the ejection surface 1C, at which time, dust or ink adhering to the vicinity of the ink ejection port 1D is blown off,
It can be dropped and adsorbed on the lower ink absorber 39.

Further, in FIG. 1, 50 is a pump for draining ink, 51A is a draining tube for guiding the draining ink from the cap chamber 12B of the cap member 11 (see FIG. 2) to the pump 50,
51B is an ink discharge tube that guides waste ink from the pump 50 to the waste ink intake port 52 of the ink cartridge 5, 53 is a large recovery valve, 54 is a cap chamber 12 from the ink extraction port 7 of the ink cartridge 5 via the large recovery valve 53. Large recovery ink hole 23B
This is a large recovery tube for guiding ink to (see FIG. 3).

Further, in FIG. 1, reference numeral 55 denotes a large recovery valve operating lever rotatably supported by a bracket 56, and when the large recovery operation is not performed, the spring force of a spring 57 shown in FIG. The valve portion 55A of the operating lever 55 keeps the large recovery valve 53 closed as shown in FIG. Then, during the large recovery operation, the operation piece 55B of the operation lever 55 contacts the lower side portion 2B of the carriage 2 so that the large recovery valve 53 can be opened.

A sheet feed roller shaft 60 is driven by a sheet feed motor (not shown). The roller shaft 60 is provided with a clutch spring 62 between the roller shaft 60 and the cam shaft drive gear 61. When rotating in the direction of the arrow B, the clutch spring 62 does not engage with the drive gear 61, and therefore the drive gear 61 does not rotate. However, when the roller shaft 60 rotates in the direction of arrow A opposite to the sheet feeding, the drive gear 61 is rotated in the same direction via the clutch spring 62 and the cam shaft 41 is rotated via the intermediate gear 63 and the cam gear 64. Rotate in the direction of arrow C.

Further, reference numeral 65 denotes a pair of positive drive cams for driving the pump (hereinafter referred to as pump drive cam), and the pump drive cam 65 has a cam groove 65A on its opposite surface. A pin 50B protruding horizontally from a piston member 50A of the pump 50 is slidably fitted. Thus, during the recovery operation at the timing described below, the piston member 50A of the pump 50 is driven in the D direction by the pump drive cam 65, and the ink discharge tubes 51A, 5A are ejected from the cap chamber 12B (see FIG. 2).
Ink cartridge 5 through 1B and waste ink inlet 52
It is possible to discharge the nematode ink to an unillustrated lees pool.

66 is a home position detection cam (hereinafter referred to as HP cam) provided on the same cam shaft 41, 67 is a home position switch that is turned on / off by the HP cam 66, and via the drive gear 61 when the power is turned on. When the camshaft 41 is rotated by the cam cam 41, the switch 67 is turned on by the HP cam 66 and the cams 40, 65 and 66 provided on the camshaft 41 are turned on.
Is initialized.

Therefore, the recovery operation of the ink jet recording apparatus configured as described above will be described. First, the recording head 1
If the recording is not performed for a predetermined time, for example, 5 seconds in this example, the carriage 2 returns to the home position and capping is performed by the cap member 11. In this case, the cap 12 that comes into pressure contact with the head ejection unit 1A is pressed. The pressure contact force of the spring 15 is set to about 300 g.

In this state, as shown in FIG. 3, the atmosphere valve 22B is closed by the air valve 21 coming into contact with the stopper 25, and the large recovery hole 23B also has the large recovery valve 53 (first recovery valve 53). As shown in the figure), the cap chamber 12B is closed.
Is kept sealed to prevent ink evaporation.

Next, an operation for preventing non-ejection due to an increase in viscosity of ink in the ink ejection portion 1A of the recording head 1, that is, a small recovery operation will be described. Such a small recovery operation is performed during a recording operation for a predetermined time or every time a predetermined recording amount is performed. In this case, when the carriage 2 moves back to the home position side in FIG. 1, the side portion 1B of the recording head 1 comes into contact with the second protruding arm of the slider 17 so that the holder support protrusion of the cap member 11 is projected. Pin 14A
Moves from right to left along the cam surface 10A of the cam plate 10 to keep the slider 17 in the state shown in FIG.
Pressure contact.

During this backward movement operation, on the other hand, the cam shaft 41 is rotated in the direction of arrow C at a timing described later to rotate the pump drive cam 65 and drive the ink discharge pump 50 to move the piston member 50A. A negative pressure is generated in the cap chamber 12B which is operated downward and is kept in a sealed state.

Therefore, the ink is forcibly sucked from the ejection hole (not shown) of the ejection portion 1B, and the dust and the adhesive ink adhering to the ejection portion 1B can be simultaneously discharged toward the pump 50. Further, the ink discharged into the pump 50 at the stage when the piston member 50A moves upward due to the subsequent drive of the pump 50 is discharged to the nematode sump via the discharge ink tube 51B.

However, in this state, if the ink remains attached to the ink ejection surface of the head 1 and the surface tension thereof is larger than the ejection pressure, it may cause ejection failure or may cause the adhered ink to scatter and cause the recording sheet 4 to be ejected. There is a risk of getting dirty. Therefore, in this example, in the next step, the air valve 21 is released from the stopper 25 while the carriage 2 is moved to the right by about 2 mm, that is, in the forward direction (see FIGS. 3 and 4). ), So that the atmosphere communication passage 22 is communicated with the atmosphere. Therefore, at this stage, the ink remaining on the cap chamber 12B and the ejection surface of the head 1 can be completely discharged by continuously using the suction operation of the pump 50.

After that, as the carriage 2 moves forward, on the one hand, the wiping cam 40 drives the slider 30 which holds the wiping member 32, and the slider 30 is projected toward the recording head 1 side, whereby a pressing force of about 100 g is applied. The ejection surface is wiped while maintaining the above condition, and then the air blowing nozzle 35 performs the wiping operation to complete a series of small recovery operations.

When attempting to perform idle ejection by the recording head 1, the slider 17 is kept in a state of being biased to the right, so that a predetermined space is provided between the ejection portion 1A of the recording head 1 and the cap 12. Ink is ejected in a state where the interval is maintained, and the ink ejected at that time is retained as it is absorbed by the polymer absorber 12A in the cap chamber 12B, and the next pump 50 Emitted when driving.

Next, the large recovery operation performed when the non-ejection is not easily recovered by the small recovery operation as described above will be described.

Since the large recovery operation repeats the same operation as the small recovery operation, that point is omitted. First, during the recovery operation, the recording head 1 is kept in close contact with the cap 12 at a position moved further 2 mm to the left than during the small recovery operation. Therefore, by moving the carriage 2 to the left at this time, the lower side portion 2B of the carriage 2 causes the operating piece of the large recovery valve operating lever 55 to move.
By contacting 55B, the large recovery valve 53 is opened.

In this state, when the piston member 50A of the pump 50 is moved downward by the pump drive cam 65 in the same manner as described at the time of small recovery, the cap chamber 12B becomes negative pressure, but in this case, the negative pressure is used for large recovery. The ink is guided from the ink cartridge 5 to the cap member 11 via the tube 54, so that the cap chamber 12B is filled with the ink. Further, in this state, ink is also ejected from the recording head 1 and the discharge operation by the pump 50 is continuously performed, and such a series of operations is repeated four times.

Then, when the recording head 1 is moved 2 mm to the right and the large recovery valve 53 is closed again, the ink is discharged by the subsequent driving of the pump 50, and the operation during the small recovery operation is performed. Imitate.

It should be noted that the ink is kept filled in the cap chamber 12B for about 1 minute before the last ink discharge described above, and the ink fixed during that time is softened.

FIG. 7 shows a cam diagram when the power supply is “on” and the small recovery operation is performed. Further, FIG. 8 shows the operation of the recording head 1 at each stage shown in FIG. 6 at that time, the x-axis shows the number of steps of the carriage drive pulse motor, and the y-axis shows the moving direction and distance of the recording head 1. .

In FIG. 7, the recovery system is initialized when the power is turned on, but the cam shaft 41 rotates and the HP cam 66 turns the home position switch 67 on, and then it rotates 10 °. The state is indicated by ⊚. At this time, pump 50
50A is at the top dead center, the wiper 32 is in the atmospheric state, and the head 1 is located at an arbitrary position in the movable range. The cap 12 and the ejection surface of the head 1 are not pressed and the air valve 21 is It is open. After that, the head 1 moves to a position where the air valve 21 is closed while the cam shaft 41 is rotated to the absolute angle of 83 °.

Hereinafter, the rotation angle of the cam shaft 41 is described as an absolute angle, and the position of the head 1 is defined as the origin. In this state, the suction by the pump 50 starts when the cam shaft 41 rotates 150 °, the bottom dead center is reached at 230 °, and the rotation of the cam shaft 41 is stopped for 0.8 seconds at 245 ° to allow sufficient ink. After being sucked, the head 1 is moved rightward by 2 mm and the air valve 21 is opened. Then, the piston member 50A rises when it reaches 260 ° due to the subsequent rotation of the cam shaft 41.
Reach top dead center at 0 °. Therefore, the state in which the head 1 is moved 2 mm to the left by continuously rotating the cam shaft 41 at a constant speed while keeping the head 1 in this state is shown by. In addition,
In the cap diagram shown in FIG. 8, when the power is “on”, (2 × 360 ° + 10 °) to (2 × 360 °) in the diagram of FIG.
The area between (+ 83 °) is indicated by a two-dot chain line. Thus,
The head 1 moves from the state according to the data transfer to perform recording, and after the recording is completed, the state returns to the state again.

Next, the state at the time of small recovery is the same state as the state, and the explanation will be started from the state. From the state (2
The diagram up to (360 ° + 10 °) is exactly the same as the diagram when the power is turned on. When it reaches (2 × 360 ° + 10 °), the head 1 moves 7 mm to the right and the camshaft 41 (2 × 360 ° + 10 °). The sweeping body 32 begins to project from the position where it has rotated up to 360 ° + 32 °) and continues to project from (2 × 360 ° + 48 °) (2 × 360 ° + 57 °).
When it reaches ()), the rotation of the cam shaft 41 is stopped and the head 1 further moves to the right by 9.5 mm. Then, at this stage, the ejection surface of the head 1 is wiped and cleaned by the wiping member 32.
After that, the cam shaft 41 rotates to (2 × 360 ° + 66 °), and then the wiper 32 starts to return to the standby state (2 × 360 ° + 78 °).
The camshaft 41 that has returned to the standby state (2 × 360 ° + 83 °) at (°) is stopped, the head 1 moves 16.5 mm to the left, the cap 12 and the discharge surface of the head 1 are brought into pressure contact, and the air valve When 21 is closed and the cap 12 is completely sealed, the state is reached and the data transfer is awaited.

Next, a diagram for the large recovery operation will be described with reference to FIGS. 9 and 10. While waiting for data transfer is performed in the above-described state, the head 1 moves 2 mm to the left from this state and the carriage 2 operates at this time to contact the operating piece 55B and open the tube 54 of the large recovery valve 53. And Then camshaft
When the 41 rotates and the piston member 50A of the pump 50 starts to descend from 150 °, it reaches the bottom dead center at 230 ° and reaches 245 °.
8 seconds The rotation of the cam shaft 41 pauses. And pump 5
Due to the negative pressure generated in 0, ink is sucked from the ejection surface of the head 1 through the large recovery hole 23B provided on the upper side of the cap 12, and then the cam shaft 41 starts to rotate again. Then, the piston member 50A rises from 260 °, reaches the top dead center at 340 °, and rotates to (360 ° + 83 °) to reach the state. Repeat these Stage I three times, then (3 x
Camshaft 41 rests for 0.8 seconds at 360 ° + 245 °)
After that, it rotates at a constant speed until (4 × 360 ° + 10 °), and in this state, the head 1 moves 2 mm to the right and the operating piece 5
5B returns to the original position, and the large recovery valve 53 is closed.

This state is maintained for 1 minute to soften the ink fixing layer adhering to the ejection surface of the head 1, and then the cam shaft 41 moves to (4
Rotate to × 360 ° + 83 °) and reach the state. From state to state is called stage II. The operation thereafter is exactly the same as the small recovery operation, and the large recovery operation can be said to be the operation of performing the small recovery operation after performing stage I three times and stage II once.

[Effects of the Invention] As described above, according to the present invention, after the suction operation is performed on the ejection portion by the suction pump, the wiping member performs the wiping operation on the ejection portion of the recording head. Since the air from the pressure chamber is pumped to the air nozzle by the pump and the air is ejected to the discharge part, the ink and dust adhering to the discharge part can be efficiently removed. It is possible to prevent the ink that has been wiped off like the case of the plate from being scattered all over when the wiping plate is restored to stain the recording sheet or attach it again to the recording head.

In addition, since the cap, the wiping body, and the air nozzle are arranged corresponding to the work order shared in the recovery processing area, the recovery processing mechanism and the recovery processing procedure can be rationally arranged, respectively, and The recovery process can be executed efficiently.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of the configuration of an ink jet recording apparatus of the present invention, FIG. 2 is a side view showing a cap member according to the present invention by partially crushing, and FIG. 3 is an entire recovery system according to the present invention. A front view, FIG. 4 is a cross-sectional view of an air valve and a cap according to the present invention, FIG. 5 is a side view of a wiping mechanism according to the present invention, and FIG. 6 is a view of a fixed-type adhered ink removing device according to the present invention. FIG. 7 is an explanatory diagram of the operation, FIG. 7 is a cam diagram when the power supply is “on” and a small recovery operation of the present invention, FIG. 8 is an operation diagram of the recording head corresponding to FIG. 7, and FIG. FIG. 10 is a cam line diagram during a large recovery operation of FIG. 10, FIG. 10 is an operation line diagram of the recording head corresponding to FIG. 9, FIG. 11 is an explanatory diagram mainly showing a recovery system of a conventional ink jet recording apparatus, and FIG. FIG. 6 is a perspective view showing a state where ink is retained in the wiping member shown in the figure. 1 ... Recording head, 1A ... Discharge part, 1B ... Side part, 1C ... Recessed discharge surface, 1D ... Discharge port, 2 ... Carriage, 2B ... Side part, 2C ... Pump drive piece, 5 ... Ink cartridge, 6 ... Ink supply tube, 8 ... Side plate, 9 ... Base, 10 ... Cam plate, 10A ... Cam surface, 11 ... Cap member, 12 ... Cap, 12A ... High Molecular absorber, 12B ... Cap chamber, 13 ... Cap holder, 14 ... Holder support, 15 ... Spring, 17 ... Slider, 17A ... First protruding arm, 17B ... Second protruding arm , 18 …… Cap guide shaft, 19,20,26,33,57 …… Spring, 21 …… Air valve, 22 …… Atmosphere communication path, 22B …… Atmosphere communication hole, 23 …… Great recovery path, 23B… … Large recovery (ink) hole, 30… Wiping body holder, 32… Wiping body, 35… Air blowing nozzle, 37… Air tube, 38… Air pump, 38D… Pressure contact part , 40 …… Sweep cam, 41 …… Cam shaft, 50 …… Exhaust ink pump, 51A, 51B …… Exhaust ink tube, 53 …… Large recovery valve, 54 …… Large recovery tube, 55 …… Large Recovery valve operating lever, 60 …… Seat feed roller shaft, 61 …… Cam shaft drive gear, 62 …… Clutch spring, 64 …… Cam gear, 65 …… Pump drive cam, 66 …… Home position detection cam, 67 …… Home position switch.

Claims (1)

(57) [Claims] 1. A carriage for mounting a recording head having an ejection portion for ejecting ink, the carriage moving in a recording area of a recording sheet arranged opposite to the ejection portion and a recovery processing area of the recording head connected to the recording area. A suction pump for performing a suction operation on the ejection portion via the cap when the ejection portion is capped by a cap arranged in the recovery processing region for capping the ejection portion of the recording head; When a drive piece provided on the carriage is engaged, it has a pressure chamber for ejecting air, and when the carriage moves and the ejection portion of the recording head is arranged to face the ejection portion, the ejection portion is arranged in the recovery processing area. An air pump for sending air from the pressure chamber to an air nozzle for injecting air, and the cap in the recovery processing area. Disposed between a position located between the air nozzles being is located,
A wiper for sweeping the ejection portion of the recording head when the carriages are arranged to face each other, and the wiping body after the suction operation is performed on the ejection portion by the suction pump. The ink jet recording apparatus is characterized in that the ejection portion of the recording head is wiped by the air pump, the air from the pressure chamber is pumped to the air nozzle by the air pump, and the air is ejected to the ejection portion. .