JP2001232817A - Ink jet recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink jet recorder in which ink can be absorbed uniformly and efficiently into an absorber. SOLUTION: First and second ink absorbing materials 32, 35 are contained in layer in a case member 21 having a capillary force generating part 24 constituting the contour of a waste ink tank 13. The first and second ink absorbing materials 32, 35 are provided with a first cut groove 34 and a through hole 37 communicating each other. The first cut groove 34 extends to the sides. Waste ink flowing out through the through hole 37 and the first cut groove 34 can be absorbed uniformly and efficiently into the first and second ink absorbing materials 32, 35 from the outer circumferential part thereof at the capillary force generating part 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording head for receiving ink from an ink cartridge and ejecting ink droplets from nozzle openings based on print data, and sealing a nozzle forming surface of the recording head. The present invention relates to an ink jet recording apparatus having a capping means for sucking and discharging ink from a nozzle opening of a recording head by receiving a negative pressure from a suction pump, and more particularly, to a waste ink tank for absorbing and holding ink discharged from the capping means. The present invention relates to an ink jet recording apparatus provided with the apparatus.

[0002]

2. Description of the Related Art Ink jet recording apparatuses have been used in many types of printing including color printing in recent years, since noise at the time of printing is relatively small and small dots can be formed at a high density. Such an ink jet recording apparatus includes an ink jet recording head that receives supply of ink from an ink cartridge, and paper feeding means that moves recording paper relative to the recording head. The recording is performed by ejecting ink droplets onto the recording paper while moving the recording paper in the width direction of the recording paper.

A recording head capable of discharging black ink and each color ink of yellow, cyan, and magenta is mounted on a carriage, and not only text printing by black ink but also the discharge ratio of each ink is changed. Enables full-color printing. The above-described ink jet type recording head performs printing by discharging ink pressurized in the pressure generating chamber as ink droplets from the nozzle opening onto the recording paper, so that the ink viscosity increases due to evaporation of the solvent from the nozzle opening. In addition, there is a problem that printing failure occurs due to solidification of ink, adhesion of dust, and mixing of air bubbles.

[0004] For this purpose, the ink jet recording apparatus is provided with a capping means for sealing the nozzle openings of the recording head during non-printing, and a wiping member for cleaning the nozzle forming surface as required. The capping means not only functions as a lid for preventing drying of the ink in the nozzle openings when printing is stopped, but also seals the nozzle forming surface with a cap member when clogging occurs in the nozzle openings. , Due to the negative pressure from the suction pump
It also has a function of sucking and discharging ink from the nozzle opening to eliminate clogging due to solidification of the ink in the nozzle opening and ink ejection failure due to air bubbles entering the ink flow path.

[0005] Forcible suction and discharge of ink for eliminating clogging of the recording head and mixing of air bubbles into the ink flow path is called a cleaning operation, and is performed after a long period of suspension of the ink jet recording apparatus. This is executed when printing is restarted or when the user recognizes that the quality of the recorded image has deteriorated and operates, for example, a cleaning switch.The nozzle forming surface of the recording head is sealed by capping means, and the recording head is closed. The operation of discharging the ink and bubbles having increased viscosity existing at the nozzle opening and upstream thereof by negative pressure is performed. Then, the ink sucked and discharged from the recording head by the cleaning operation is introduced into the waste ink tank by driving the suction pump, and the ink is held by the ink absorber stored in the waste ink tank. I have.

For example, in a waste ink storage device described in Japanese Patent Application Laid-Open No. 9-300656, a waste ink container accommodates an ink absorber formed by laminating six ink absorbing plates. In this case, a cutout is formed at the end of the upper two ink absorbing plates, and the waste ink is dropped onto the ink absorber from the downstream end of the waste ink tube facing the cutout. (Downflow). That is, waste ink having a relatively low viscosity is absorbed from the middle of the end portion of the ink absorber to the entire area. This allows
A relatively small container can store a sufficient amount of waste ink corresponding to the useful life of the ink jet recording apparatus.

[0007]

By the way, in such a conventional waste ink storage device, waste ink is always dropped on a notch portion (a portion facing the notch portion) of the ink absorber, and the waste ink is dropped on the notch portion. From the entire area. However, the waste ink dropped in the notch portion is accumulated in the notch portion and is gradually absorbed.
For this reason, the surface of the waste ink dries, and a highly viscous portion that is difficult to be absorbed adheres to the notch portion, and this is repeated, whereby the notch portion is clogged. When the clogging occurs, absorption of the waste ink into the ink absorber is prevented, and the waste ink overflows from the waste ink tank before the ink absorber becomes saturated.

The present invention has been made in view of the technical problems as described above, and has as its object to provide an ink jet recording apparatus capable of uniformly and efficiently absorbing ink into an ink absorber. It is assumed that.

[0009]

According to the present invention, there is provided an ink-jet recording apparatus which achieves the above-described object and receives ink supplied from an ink cartridge and discharges ink droplets from nozzle openings. A recording head, capping means for sealing a nozzle forming surface of the recording head, receiving suction from a nozzle opening of the recording head by receiving a negative pressure from the suction pump, and driving the suction pump. A waste ink tank containing an ink absorber that absorbs and retains the ink discharged from the capping means, wherein the inside of the side wall of the waste ink tank is provided for moving ink. At least one capillary force generating section is provided.

According to the ink jet recording apparatus having the above-described structure, the waste ink tank is provided with at least one capillary force generating portion inside the side wall, so that the ink in the waste ink tank can be moved. The ink is also absorbed from around the ink absorber through the capillary force generating section. As a result, the ink can be uniformly and efficiently absorbed by the ink absorber.

Here, the ink absorber has at least one first notch groove located on the lower side, the side surface of which is in contact with the capillary force generating portion, and which opens to the side and extends inward. A first ink-absorbing material having a through-hole that is stacked on the first ink-absorbing material so that the ink discharged from the capping unit drips and communicates with at least a part of the first cutout groove; It is desirable that the second ink absorbing material be used.

According to the ink jet type recording apparatus thus constructed, the ink sucked and discharged from the recording head by the cleaning operation is sent to the waste ink tank by driving the suction pump, and is stored in the waste ink tank. It is dropped into a through hole formed in the ink absorber. Since the through hole and the first notch groove are formed in the ink absorber, the contact area between the first and second ink absorbers and the ink increases. For this reason, the introduced ink enters the through-hole and the first notch groove, and when clogging occurs, avoids the clogged portion and permeates the ink absorber to be efficiently absorbed.

Further, the waste ink which has progressed from each of the first notch grooves to the gap between the side wall of the waste ink tank and the ink absorbing material rises in the groove of the capillary force generating portion, and the first and second ink absorbers It is absorbed from the periphery (outer periphery). In addition, the ink solvent evaporates by natural drying, so that it functions to successively absorb and hold new waste ink.

As described above, the introduced ink is absorbed by the first and second ink absorbers while entering the through hole and the first notch groove, and the peripheral portions of the first and second ink absorbers ( Since the ink is absorbed from the outer peripheral portion), the ink is absorbed in the entire first and second ink absorbers. That is, the ink absorber not only absorbs the ink from the through-holes and the first notch grooves but also absorbs the ink from the surroundings through the capillary force generating portion, so that the ink absorption efficiency is improved.

Here, it is preferable that a plurality of the first ink absorbing materials are stacked, and a plurality of the second ink absorbing materials are stacked. in this way,
Since the ink absorber is formed by laminating a plurality of first ink absorbers or laminating a plurality of second ink absorbers, the total thickness of the ink absorber can be adjusted according to the service life.

Further, the first notch groove and the through hole are connected to the second ink absorbing material in communication with the through hole.
It is desirable that they be communicated via the notch groove. In this way, by providing the second notch groove, the second ink absorbing material also absorbs ink from the second notch groove.
The second ink absorbing material can efficiently absorb the ink.

Further, it is desirable that a gap is formed between the ink absorber and the side wall of the waste ink tank.
As described above, since the gap is formed between the ink absorber and the side wall of the waste ink tank, the ink is efficiently supplied to the capillary force generating unit, and the ink is efficiently placed around the ink absorber (peripheral portion). Can be absorbed.

It is preferable that a plurality of the capillary force generating portions are provided inside the side wall, and one is provided on each side wall of the waste ink tank. Thus, since a plurality of capillary force generating portions are provided,
Ink can be efficiently absorbed from the outer peripheral portion of the second ink absorbing material. In addition, a capillary force generator is provided on each side wall.
Since the two inks are provided, the ink can be efficiently absorbed from the outer peripheral portion of the second ink absorbing material.

It is preferable that at least one first notch groove is provided between the capillary force generating portions. As described above, since at least one first notch groove is disposed between the capillary force generating portions, the ink is supplied from one or both of the capillary force generating portions sandwiching the first notch groove. Can be efficiently raised and absorbed from the outer peripheral portion of the ink absorber.

Preferably, the shape formed by the side wall of the waste ink tank and the planar shapes of the first ink absorbing material and the second ink absorbing material are vertically and / or horizontally symmetrical. The shape is polygonal, and at least one of the first ink absorbing members is provided on each side of the first ink absorbing material.
Desirably, a notch groove is provided. As described above, since the shape formed by the side wall of the waste ink tank and the planar shape of the first ink absorbing material and the second ink absorbing material are vertically and / or horizontally symmetrical, the first ink absorbing material is surely added to the waste ink tank. An absorbing material and a second ink absorbing material can be accommodated. The planar shape is polygonal, and the first
Since at least one first notch groove is provided on each side of the ink absorbing material, ink can be efficiently absorbed on the outer periphery of the first ink absorbing material.

Preferably, the groove for moving the ink in the capillary force generating section has an opening of 45 to 120 degrees. In particular, it is desirable that the groove be formed with an opening of about 90 degrees. As described above, since the groove is formed in the capillary force generating portion with an opening of 45 to 120 degrees, the ink can be efficiently and reliably raised.
Further, the present invention is not limited to the grooves formed with the above-described predetermined opening degree, and may be, for example, grooves having a rectangular cross section. In this case, for example, it is preferable that the width is about 0.3 mm and the depth is about 0.6 mm.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an ink jet recording apparatus according to the present invention will be described based on an embodiment shown in the drawings. FIG. 1 shows a basic configuration of an ink jet recording apparatus to which the present invention can be applied. In FIG. 1, reference numeral 1 denotes a carriage, and the carriage 1 is a timing belt 3 driven by a carriage motor 2.
Through the guide member 4 so as to reciprocate in the axial direction of the platen 5. Carriage 1
An ink jet type recording head 7 is mounted on the side facing the recording paper 6, and a black ink cartridge 8 for supplying ink to the recording head 7 and a color ink cartridge 9 are detachably mounted thereon. Has been loaded.

In the drawing, reference numeral 10 denotes a capping means arranged in a non-printing area (home position), which can seal the nozzle forming surface of the recording head 7 when the recording head 7 is moved directly above. It is configured. A suction pump 11 for applying a negative pressure to the internal space of the capping unit 10 is provided below the capping unit 10.
Is arranged. The capping unit 10 controls the recording head 7 during the idle period of the ink jet recording apparatus.
In addition to functioning as a lid to prevent drying of the nozzle opening,
By applying a drive signal irrelevant to printing to the recording head 7 to function as an ink receiver at the time of a flushing operation for causing ink droplets to be ejected idly, the negative pressure from the suction pump 11 is applied to the recording head 7 to It also has the function of a cleaning operation for sucking and discharging ink.

A wiping member 12 made of an elastic plate such as rubber is disposed near the capping means 10. When the carriage 1 reciprocates toward the capping means 10, the nozzle forming surface of the recording head 7 is formed. Is configured to perform a wiping operation for wiping.

FIG. 2 schematically shows the structure of the capping means 10 mounted on the ink jet recording apparatus shown in FIG. 1 and the suction pump 11 and the like connected thereto. The capping means 10 includes a rectangular cap case 10a having an open upper surface, and the cap case 10a.
And a cap member 10b made of a flexible material such as a rubber material, which is housed therein. The cap member 10b is formed such that an upper edge thereof is slightly protruded from the cap case 10a. An ink absorbing material 10c formed of a porous material is provided on the inner bottom of the cap member 10b.
Are stored, and the ink absorbing material 10c is held by a holding body 10d formed integrally with the cap member 10b.

A suction port 10e and an atmosphere opening port 10f are formed in the lower bottom of the cap case 10a so as to penetrate the cap case 10a and the cap member 10b, respectively. A suction pump 11 is connected to a suction port 10e of the cap case 10a via a tube T1, and a discharge-side end of the suction pump 11 absorbs ink stored in a waste ink tank 13 as described later. Connected to the body. Further, a tube T2 is connected to the atmosphere opening port 10f of the cap case 10a.
The atmosphere release valve 14 is connected via the.

On the other hand, reference numeral 7 in FIG. 2 denotes a recording head. When the recording head 7 is located above the capping means 10 as the carriage moves, the nozzle forming surface 7a is sealed by the cap member 10b. It is configured to be stopped (capping). A plurality of nozzle openings 7b are formed in the nozzle forming surface 7a, and black ink and each of yellow, cyan, magenta, and the like are generated by the vibration action of a piezoelectric vibrator 7c arranged corresponding to each nozzle opening 7b. It is configured to eject color ink.

In the above configuration, the operation of discharging the residual air bubbles in the recording head 7 or the ink supply path and sucking the ink for eliminating the clogging of the nozzle opening 7b is performed by the cap member 10b as shown in FIG. Is brought into close contact with the nozzle forming surface 7a of the recording head 7 and the air release valve 14 is closed. By driving the suction pump 11 in this state, a negative pressure is applied to the internal space of the cap member 10b, and the nozzle opening 7
The ink is sucked and discharged from b. Suction pump 1 for a fixed time
After driving 1, the motor stops.

Thereafter, when the negative pressure inside the cap member 10b is reduced to some extent, the atmosphere release valve 14 is opened, and the atmosphere is introduced into the cap member 10b via the tube T2, and the negative pressure inside the cap member 10b is reduced. It is released. Subsequently, the suction pump 11 is driven again with the atmosphere release valve 14 opened, so that the cap member 10b is opened.
The ink discharged inside is sent to the waste ink tank 13 via the tube T1.

Next, FIG. 3 to FIG.
1 shows an embodiment of a waste ink tank 13 for receiving waste ink discharged by driving of the printer. In addition,
3 is a top view showing the waste ink tank 13 as viewed from above, FIG. 4 is a cross-sectional view taken along line AA in FIG. 3 in the direction of the arrow, and FIG. A first ink absorber 32 and a second ink absorber 35 that constitute the ink absorber 31 stacked and housed in the tank 13
It is the perspective view which showed and isolate | separated.

First, as shown in FIGS. 3 and 4, the case member 21 constituting the outer shell of the waste ink tank 13 has a substantially quadrangular shape with its side wall 22 and positioning side wall 23 raised and the upper part opened. In this embodiment, an inner surface of each of the side walls 22 is provided with a capillary force generating portion 24 for sucking up ink one by one and for positioning in contact with the first and second ink absorbing members 32 and 35. Note that each capillary force generating unit 24 has a V
A plurality of U-shaped grooves 25 are formed. Then, the first and second ink absorbing members 32 and 35 having the configuration shown in FIG. 5 are stacked in the vertical direction and housed in the case member 21.
As shown in FIG. 4, in this embodiment, the first ink absorbent 32 is composed of one sheet, and the second ink absorbent 35 is composed of three sheets. This number is not particularly limited, and any number may be plural.
These numbers are appropriately determined in consideration of the service life and the like.

The V-shaped groove 25 of the capillary force generator 24
Are formed at an opening of 45 to 120 degrees. As described above, the groove 25 is formed in the capillary force generating portion 24 by 45 degrees to 120 degrees.
Since the ink is formed with the degree of opening, the ink can be efficiently and reliably raised. Further, the present invention is not limited to the grooves formed with the above-described predetermined opening degree, and may be, for example, grooves having a rectangular cross section. In this case, for example, it is preferable that the width is about 0.3 mm and the depth is about 0.6 mm.

The above-mentioned quadrilateral first ink absorbing material 32 has a positioning notch 33 in which a part of a corner is cut out so as to correspond to the positioning side wall 23, and an opening substantially at the center of each side. It is provided with four first notch grooves 34 formed at equal intervals (90-degree intervals) extending to the inner center. Also,
The second ink absorbing material 35 includes a positioning notch 36 in which a part of a corner is cut out corresponding to the positioning side wall 23,
A through hole 37 into which the waste ink is dropped is formed substantially at the center. Note that the through holes 37 are provided in the respective first notch grooves 34.
At one end, respectively. Then, in order to open the end portion (side portion) of the first notch groove 34 of the first ink absorbing material 32 to the atmosphere, a capillary is provided between the side wall 22 and the first and second ink absorbing materials 32 and 35. Force generator 24
Thus, a gap S is formed.

Since the first and second ink absorbing members 32 and 35 have the alignment notches 33 and 36, they can be appropriately stored in the case member 21.

In the above configuration, when the ink sucked and discharged from the recording head 7 is sent to the waste ink tank 13 by driving the suction pump 11, the waste ink tank 1
3 is dropped into a through hole 37 formed in the second ink absorbing material 35 housed in the third ink absorbing member 3. In this case, the ink can flow into the through-hole 37 without resistance because the through-hole 37 is open to the atmosphere via the first cutout groove 34 of the first ink absorbing material 32. Since the through-hole 37 is open to the atmosphere, the ventilation is improved, the evaporation of the ink solvent after being absorbed by the second ink absorbing material 35 is promoted, and the amount of unevaporated ink can be reduced. it can.

The first ink absorbing material 32 flows into each of the first cutout grooves 34 formed in the first ink absorbing material 32.
And a part thereof advances in the gap S between the side wall 22 and the ink absorbing material 31 and rises in the groove 25 of the capillary force generating part 24, and the first and second ink absorbing materials 32, 35 (ink It is absorbed from the outer periphery of the absorber 31).

As described above, the ink sent to the waste ink tank 13 firstly passes through the through holes 3 of the second ink absorbing material 35.
7 and the first ink absorbing material 32 facing the through hole 37.
Ink that was absorbed from and unabsorbed from each
If clogging occurs while flowing into the notch groove 34, the clogging is avoided and the first ink absorbing material 32 efficiently absorbs the clogging. Then, the ink that has flowed into the gap S is again absorbed from the outer peripheral portions of the first and second ink absorbers 32 and 35 by the capillary force generating unit 24. Then, as the ink solvent evaporates by natural drying, new waste ink is sequentially absorbed and held. As a result, the waste ink is absorbed and held over the entire surfaces of the first and second ink absorbing members 32 and 35.

Next, FIG. 6 to FIG.
This shows another embodiment of the waste ink tank 13 for receiving the waste ink discharged by the drive of. 6 is a top view showing the waste ink tank 13 as viewed from above, FIG. 7 is a cross-sectional view of FIG. 6 taken along line BB in the direction of the arrow, and FIG. Ink absorber 31A stacked and stored in waste ink tank 13
FIG. 4 is a perspective view showing a first ink absorbing material 32A and a second ink absorbing material 35A constituting the liquid crystal device separately.

The case member 21 forming the outer shell of the waste ink tank 13 is configured in the same manner as in the first embodiment. As shown in FIGS. 6 and 7, the case member 21 forming the outer periphery of the waste ink tank 13 has a substantially quadrangular shape in which the side wall 22 and the alignment side wall 23 are raised and the upper part is opened. The inner surface of each side wall 22 is integrally provided with a capillary force generating portion 24 that sucks up ink one by one and positions it in contact with the first and second ink absorbing materials 32 and 35. In each of the capillary force generating sections 24, a plurality of V-shaped grooves for sucking up ink or grooves 25 having a rectangular cross section are formed.

Then, the first and second modes shown in FIG.
The ink absorbers 32A and 35A are stacked in the vertical direction and housed in the case member 21. The quadrilateral first ink absorbing material 32A has a positioning notch 33A in which a part of a corner is cut out so as to correspond to the positioning side wall 23, and an opening at substantially the center of each side to extend to the center inside. Equidistant (90
(First interval grooves) 34A formed at an interval (degree intervals). The second ink absorbing material 35A has a positioning notch 36A in which a part of a corner is cut out corresponding to the positioning side wall 23, a through hole 37A in which waste ink is dripped almost at the center thereof, and a through hole 37A. And four second notch grooves 38A extending radially at equal intervals (90-degree intervals) and having outer end portions communicating with the corresponding first notch grooves 34A.

Then, in order to open the end of the first notch groove 34A of the first ink absorbing material 32A to the atmosphere, the side wall 2 is formed.
A gap S is formed in the capillary force generator 24 between the second and the first and second ink absorbing members 32A and 35A. In addition,
The first and second ink absorbing materials 32A and 35A described above.
Since the positioning notches 33A and 36A are formed, the can be appropriately stored in the case member 21.

In the above configuration, the ink sucked and discharged from the recording head 7 is absorbed by the first and second ink absorbing materials 32A and 35A after being sent to the waste ink tank 13 by driving the suction pump 11. The operation, effects, and the like are the same as those of the above-described embodiment, and a description thereof is omitted.

In the embodiment shown in FIGS. 3 to 8, the capillary force generating section 24 and the first notch grooves 34 and 3 are provided.
Although the number of the 4A and the second notch grooves 38A is four, the effect can be obtained as long as there is at least one. Further, the shape formed by the side wall 22 of the waste ink tank, the first ink absorbing material 3
Although the plane shapes of the second and second ink absorbing members 35 and 35A are rectangular, other shapes may be used. Further, in the above embodiment, the first and second ink absorbing materials 3
Notches 33,3 for positioning at 2,35,32A, 35A
Although the case where 6, 33A and 36A are formed has been described, the first and second ink absorbing materials may be formed in a vertically and / or horizontally symmetric shape without forming the alignment notch. That is, by forming the shape formed by the side wall of the waste ink tank and the plane shapes of the first ink absorbing material and the second ink absorbing material vertically and / or horizontally, the waste ink tank is definitely formed in the waste ink tank. The first ink absorber and the second ink absorber can be accommodated.

[0044]

As is apparent from the above description, according to the ink jet recording apparatus of the present invention, a capillary force generating portion is formed on the side wall of the waste ink tank, and the ink is
Since the ink is also absorbed from the outer periphery of the ink absorber by the capillary force generating section, the ink can be uniformly and efficiently absorbed by the ink absorber.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a basic configuration of an ink jet recording apparatus to which the present invention is applied.

FIG. 2 is a sectional view showing an example of capping means mounted on the recording apparatus shown in FIG. 1 and peripheral devices thereof.

FIG. 3 is a top view showing the waste ink tank viewed from above.

FIG. 4 is a cross-sectional view taken along line AA in FIG. 3 in an arrow direction.

FIG. 5 is a perspective view showing a first ink absorbing material and a second ink absorbing material constituting an ink absorber stacked and housed in a waste ink tank.

FIG. 6 is a top view showing the waste ink tank viewed from above.

FIG. 7 is a sectional view of a state in which the line BB in FIG. 6 is viewed in the direction of the arrow;

FIG. 8 is a perspective view showing a first ink absorber and a second ink absorber constituting an ink absorber stacked and housed in a waste ink tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Carriage 6 Recording paper 7 Recording head 7a Nozzle formation surface 7b Nozzle opening 8 Black ink cartridge 9 Color ink cartridge 10 Capping means 11 Suction pump 12 Wiping member 13 Waste ink tank 14 Atmospheric release valve 21 Case member 22 Side wall 24 Capillary force Generation unit 25 Groove 31 Ink absorber 32, 32A First ink absorber 33, 33A Positioning notch 34, 34A First notch groove 35, 35A Second ink absorbing material 36, 36A Positioning notch 37, 37A Penetration Hole 38, 38A 2nd notch groove

Claims (12)

[Claims] An ink jet recording head that receives ink supplied from an ink cartridge and discharges ink droplets from nozzle openings, seals a nozzle forming surface of the recording head, and reduces a negative pressure from a suction pump. A capping means for receiving and sucking and discharging ink from a nozzle opening of the recording head; and a waste ink tank containing an ink absorber for absorbing and holding the ink discharged from the capping means by driving the suction pump. An ink jet recording apparatus according to claim 1, wherein at least one capillary force generator for moving ink is provided inside a side wall of said waste ink tank. 2. The ink absorber is located on a lower side,
A first ink-absorbing material having at least one first notch groove that is open at the side and extends inward while a side surface abuts on the capillary force generating portion; and a first ink-absorbing material that is stacked on the first ink-absorbing material. And a second ink absorbing material having a through-hole communicating with at least a part of the first notch groove while the ink discharged from the capping means is dripped. 2. The ink jet recording apparatus according to 1. 3. The ink jet recording apparatus according to claim 2, wherein a plurality of the first ink absorbing materials are stacked. 4. The ink jet recording apparatus according to claim 2, wherein a plurality of the second ink absorbing materials are stacked. 5. The method according to claim 1, wherein the first notch groove and the through hole communicate with each other via a second notch groove of the second ink absorbing material communicating with the through hole. The ink jet recording apparatus according to claim 2. 6. The ink jet recording apparatus according to claim 1, wherein a gap is formed between the ink absorber and a side wall of the waste ink tank. 7. The ink jet recording apparatus according to claim 1, wherein a plurality of said capillary force generating portions are provided inside a side wall. 8. The ink jet recording apparatus according to claim 7, wherein one of said capillary force generating sections is provided on each side wall of the waste ink tank. 9. The ink jet recording apparatus according to claim 2, wherein at least one of the first notch grooves is arranged between the capillary force generating portions. . 10. The shape formed by the side wall of the waste ink tank and the planar shapes of the first ink absorbing material and the second ink absorbing material are vertically and / or horizontally symmetrical. The inkjet recording apparatus according to claim 2. 11. The ink-jet printer according to claim 10, wherein the planar shape is a polygon, and at least one first notch groove is provided on each side of the first ink absorbing material. Expression recording device. 12. The ink-jet apparatus according to claim 1, wherein the groove for moving the ink in the capillary force generating section is formed at an opening of 45 to 120 degrees. Expression recording device.