JP3453531B2 - Ink jet recording device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used as an ink jet recording apparatus for ejecting ink onto a recording medium for recording, particularly as a recording apparatus for printers, copying machines, facsimiles, word processors, electronic typewriters, computers and the like. The present invention relates to a recovery device for a recording head in a recording device, and more particularly to a wiping device for cleaning a nozzle surface of the recording head.

[0002]

2. Description of the Related Art Conventionally, in an ink jet recording apparatus, foreign matter such as ink droplets, dust, paper dust, etc. is caused on the nozzle surface of the recording head due to recording operation, leaving and forced ejection (pumping) of ink from nozzles of the recording head. There is a possibility that they may adhere to each other, which may lead to deterioration in image quality. To remove the foreign matter, a wiping device for rubbing an elastic wiper such as rubber against the nozzle surface is provided.

Further, in order to cope with various thicknesses of the recording medium and to accommodate a recording medium with folds such as perforated paper, a mechanism for switching the distance of the recording head from the recording medium is provided. In the case of thick paper or perforated paper, the recording head may be used while being separated from the recording medium surface.

When the position of the recording head changes, the wiping performance of the wiper changes when the recording head contacts the recording head, the contact force, the contact angle, etc., and the wiping performance changes. Wiping may not be possible.

[0005]

In the prior art, therefore, a guide surface is provided on the recording head or a carriage that holds and moves the recording head so that the wiper follows the position of the recording head. By using a mechanism for positioning the wiper by using the wiper, the wiping performance is made constant regardless of the position of the recording head. However, a force acts on the recording head or the carriage when positioning the wiper against the recording head or the carriage, and in the case of belt driving or the like, a slight amount of deviation occurs in the position of the belt between the drive source and the carriage. This may occur and may affect the image. Further, in such a mechanism, the structure becomes complicated, the accuracy of parts is required, and the number of parts is increased, which causes a cost increase.

Further, conventionally, the wiping device as a whole is moved in accordance with the position of the recording head by interlocking with the position switching mechanism of the recording head. In this case, since the entire wiping mechanism is moved, the mechanism is complicated and the cost is increased.

Further, in the prior art, Japanese Patent Laid-Open No. 6-270
In Japanese Patent Laid-Open No. 413 and JP-A-7-205434, a plurality of wipers having different heights are provided in order to improve the wiping performance, but good wiping can be performed according to a plurality of print head positions. could not.

Therefore, in order to solve such a conventional problem, an object of the present invention is to make it possible to switch the distance of the recording head with respect to the recording medium and to provide a plurality of wipers having different tip positions corresponding to the position of the recording head. Due to
By wiping the recording head, it is possible to always perform good wiping without imposing any load on the recording head or the carriage and regardless of switching of the position of the recording head, and to maintain good image quality. An object of the present invention is to provide an inkjet recording device characterized by the above.

[0009]

In order to achieve the above object, an ink jet recording apparatus according to the present invention is an ink jet recording apparatus for ejecting ink from a recording head onto a recording medium to perform recording. A switching mechanism for switching the distance to the recording medium, a first wiper for wiping the recording head, and a first wiper having the same length as the first wiper, and the first wiper wipes the recording head. And a second wiper for wiping the recording head, and the contact amount of the first wiper with respect to the recording head when the distance is set to the first distance by the switching mechanism is the second wiper. And the contact amount of the first wiper with respect to the recording head when the distance is set to the first distance, Distance and the contact of the second wiper with respect to the recording head when the said first second distance greater than the distance, characterized in that it is set to be substantially the same.

[0010]

[0011]

[0012]

[0013]

[0014]

[0015]

[0016]

[0017]

[0018]

[0019]

[0020]

According to the ink jet recording apparatus of the present invention configured as described above, recording means for ejecting ink from a nozzle to a recording medium to perform recording, and contact with the recording means to recover. In an inkjet recording apparatus having recovery means for performing processing, a switching mechanism for switching a distance between a recording head and a recording medium and a tip position, a length and / or a thickness depending on the distance between the recording head and the recording medium are different. The wiper has a plurality of wipers, and the tip positions of the wipers are arranged so that the acting force, the amount of deflection, and the contact angle of the wiper when the wiper and the recording head come into contact are approximately the same, A wiper to be used depending on the carriage position according to the distance between the recording head and the recording medium by disposing an absorber on the recording head or a wiper in the moving direction of the recording head. In addition, since the difference between the moving distance of the recording head and the height of the wiper by the switching mechanism for switching the position of the recording head is set to be approximately the same, recording is performed by wiping the recording head. It is possible to always perform good wiping and maintain good image quality without imposing a load on the head or the carriage and regardless of switching of the position of the recording head.

Other objects, features and advantages of the present invention will become apparent from the detailed description given below with reference to the accompanying drawings.

(Embodiment 1) Referring to the drawings, a first embodiment of the ink jet recording apparatus according to the present invention will be described. FIG. 1 is a diagram showing the overall construction of the ink jet recording apparatus of the present invention. .

As shown in FIG. 1, a recording head 1 in an ink jet recording apparatus to which the present invention is applied uses a plurality of nozzles 1a provided in the recording head 1 as recording information for ink droplets of a single color or a plurality of colors. In response, the recording medium 2 is discharged to form an image. As a recording method, there are a bubble jet type in which ink droplets are ejected by bubbling of ink by heat, a piezoelectric type in which ink droplets are ejected by a piezoelectric element such as a piezo element, and the like.

The recording head 1 is positioned on a carriage 3, and the carriage 3 is movably guided and supported by a carriage shaft 4. A belt 5 is fixed to the carriage 3 and is moved in the direction of arrow A in the figure by a drive source (not shown).

A recovery unit 6 for performing various recovery processes such as wiping, capping, or suction of the recording head 1 protects the nozzle portion of the recording head 1,
In addition, a cap 7 that covers the nozzle surface of the recording head 1 to suck ink from the nozzle 1a, a pump 8 that communicates with the cap 7 and that sucks ink from the nozzle 1a of the recording head 1, and a wiper guide 10 are provided. Arrow B in FIG.
And a plurality of wipers 9a to 9d that are movably guided and supported by a driving source (not shown) in the direction.
Further, the recovery unit 6 includes a preliminary ejection position for performing preliminary ejection of ejecting ink from the nozzles 1a in areas other than the recording area in order to maintain the ejection performance of the recording head 1. Wiping is performed by moving the carriage 3 to a position where the nozzle 1a of the recording head 1 faces the wiper unit 9 and driving the wiper unit 9 in the direction of arrow B.

FIG. 2 is a view showing the structure of the wiper in the width direction. As shown, the wiper unit 9 is provided with a plurality of wipers 9a, 9b, 9c, 9d,
The width of the wipers 9a and 9c is the nozzle 1a of the recording head 1.
Is provided so that the nozzle 1a can be satisfactorily cleaned. Further, the widths of the wipers 9b and 9d are provided so as to include the face surface 1b forming the nozzle surface of the recording head 1, and are configured to favorably clean the entire face surface during capping and suction. ing. In this embodiment, the wiper 9a,
Although the configuration in which the wipers 9b and 9a are arranged in this order is shown, the arrangement is not limited to such an arrangement, and the wipers 9b and 9a may be arranged in that order, for example.

Further, in this embodiment, a plurality of wipers for the nozzle and a plurality of wipers for the face surface are provided, but one wiper may be used for the sake of simplification. By setting the wiper 9 for the face surface
Both functions can be satisfied by using only b and 9d.

FIG. 3 is a sectional view of the ink jet recording apparatus. The recording medium 2 is supported by the platen 11 and the distance between the recording head 1 and the recording medium 2 is kept constant. The recording medium 2 includes a set of paper feed rollers 12 and a paper discharge roller 13.
And is conveyed by being sandwiched by a pair of. Further, the carriage 3 is also guided and supported by a carriage guide 14 provided substantially above the carriage shaft 4.

FIG. 4 is a sectional view of a switching mechanism for switching the distance of the recording head 1 to the recording medium 2. This switching mechanism has a position adjusting lever 15 for the recording head 1.
The carriage shaft 4 is attached to the frame 16 (FIG. 1) via the position adjusting lever 15 of the recording head 1 at the end. The carriage shaft 4 is arranged with respect to the rotation center of the position adjusting lever 15 of the recording head 1 with respect to the frame 16.
Are mounted eccentrically, and the position adjusting lever 15 of the recording head 1 is rotated in the direction of arrow C in FIG.
The carriage shaft 4 rotates in the direction of arrow D in the figure, so that the carriage 3 and the recording head 1 move in the direction of arrow E in the figure with respect to the recording medium 2. Here, in order to maintain image quality, it is preferable that the ink ejection direction from the nozzles 1a of the recording head 1 with respect to the recording medium 2 does not largely change. The carriage shaft 4, which guides the carriage 3, and the carriage guide 14 are arranged substantially vertically, and the horizontal position of the carriage shaft 4 with respect to the switching position of the position adjusting lever 15 of the recording head 1 is made substantially equal to the recording medium 2. The ink can be ejected from the nozzles 1a of the recording head 1 in substantially the same direction.

5 and 6 are a sectional view of the wiper unit 9 and a view showing a wiping state.

FIG. 5 shows the position adjusting lever 1 of the recording head 1.
5 shows the wiping state when the distance between the recording head 1 and the recording medium 2 is the shortest.

First, FIG. 5A shows a state before the start of wiping. The tip positions of the wipers 9a and 9b are higher than the nozzle surface of the recording head 1 by a distance a,
The tip positions of the wipers 9c and 9d are higher than the nozzle surface of the recording head 1 by a distance b. Also, wiper 9
The distance between a and the wiper 9b is separated by a distance c,
The wiper 9c and the wiper 9d are separated by a distance d. Further, the wipers 9a, 9b, 9c and 9d are configured to have the same length and thickness.

The wiper unit 9 is attached to the wiper guide 10
In the state of FIG. 5 (b) driven along, the wiper 9a and the wiper 9b hit the face surface of the recording head 1, and the face surface is cleaned in a bent state. In this case, the distance a is set so that the wiping is favorably performed when the position of the recording head 1 is closest to the recording medium 2, and specifically, when the recording head 1 is in the wiping state, the wiper 9a, Contact angle of 9b and recording head 1
It is set so that the acting force on is appropriate.
The tip position of the wiper 9a at the time of wiping is separated from the wiper 9b by a distance e, and the distance c is set so that the wiper 9a and the wiper 9b do not come into contact with each other or interfere with each other.

Further, in the state of FIG. 5C in which the wiper unit 9 is driven along the wiper guide 10, the wiper 9c and the wiper 9d hit the face surface of the recording head 1 and clean the face surface in a bent state. To go. In this case, the tip position of the wiper 9c during wiping is separated from the wiper 9d by a distance f, and the distance d is set so that the wiper 9c and the wiper 9d do not come into contact with each other or interfere with each other. The wiper 9c and the wiper 9d further wipe the surfaces already cleaned by the wiper 9a and the wiper 9b when the position of the recording head 1 is closest to the recording medium 2.

Further, the wiper unit 9 is driven along the wiper guide 10 and the wiper cleaner support plate 16 is driven.
The wiper unit 9 is driven to the area of the wiper cleaner 17 provided in the. Wiping is performed on the wiper cleaner 17 in the same manner as the recording head 1, and ink and foreign matter attached to the wipers 9a, 9b, 9c, 9d are transferred to the wiper cleaner 17, and the wipers 9a, 9b,
9c and 9d are cleaned. The wiper cleaner support plate 16 covers the wiper 9a, 9b, 9c, and 9d so as to prevent the ink from scattering when the wiper 9a, 9b, 9c, and 9d is separated from the recording head 1 and returns to the bending state.

As described above, good wiping can be performed by the wipers 9a and 9b when the recording head 1 is closest to the recording medium 2.

FIG. 6 shows the position adjusting lever 1 of the recording head 1.
5 shows the wiping state when the distance between the recording head 1 and the recording medium 2 is the largest.

FIG. 6A shows the state before the start of wiping, in which the tip positions of the wipers 9c and 9d are higher than the nozzle surface of the recording head 1 by a distance a.

The wiper unit 9 is attached to the wiper guide 10
In the state of FIG. 6 (b) driven along, the wiper 9a
The wiper 9b does not come into contact with the face surface of the recording head 1.

Further, in the state of FIG. 6C in which the wiper unit 9 is driven along the wiper guide 10, the wiper 9c and the wiper 9d hit the face surface of the recording head 1 and clean the face surface in a bent state. To go. Distance a
Is set so that the wiping is good when the position of the recording head 1 is farthest from the recording medium 2. Specifically, when the recording head 1 is in the wiping state, the contact angle between the wipers 9c and 9d and the recording are set. The acting force of the head 1 is set to an appropriate state.

Further, the wiper unit 9 is driven along the wiper guide 10 so that the wiper cleaner supporting plate 17 is provided.
The wiper unit 9 is driven up to the area of the wiper cleaner 18 provided in the.

As described above, the recording head 1 is farthest from the recording medium 2.
In this state, good wiping can be performed by the wipers 9c and 9d.

Although the moving distance of the recording head 1 is larger than the distance a between the recording head 1 and the tip of the wiper in this embodiment, the moving distance of the recording head 1 is between the recording head 1 and the tip of the wiper. This is also effective when the distance is smaller than the distance a. In this case, in the state of FIGS. 6B and 6C, the wipers 9a and 9b hit the recording head 1 and become bent, and the wiper 9a , 9b is not good, but the next wiping is performed.

As a specific wiper construction condition of this embodiment, for example, the width of the wiper is 14 mm for the nozzle,
For the face surface, for a 22 mm recording head (determined by the nozzle configuration and face configuration),
Perform good wiping when the wiper material is HNBR, rubber hardness is 75 degrees, wiper thickness is 0.65 mm, wiper length is 5.5 mm, and distance between wiper tip and nozzle surface (a) is 2 mm. You can

The thickness of the wiper is preferably in the range of 0.4 mm to 3 mm depending on molding conditions and the like. Also,
As a material for the wiper, rubber such as HNBR or chlorinated butyl rubber is preferable in terms of ink resistance and durability.
Further, the rubber hardness is preferably in the range of 35 to 85 degrees.

Further, regarding the acting force at the time of contact with the recording head, an appropriate value is required depending on the structure of the face surface of the recording head. In particular, with respect to durability, the acting force is restricted by the material of the face surface.

Further, the recording head in the ink jet recording apparatus of the present invention is an ink jet recording means for ejecting ink by utilizing heat energy, and is provided with an electrothermal converter for generating heat energy. . Further, this recording head performs recording by ejecting ink from the nozzles by utilizing the pressure change caused by the growth and contraction of bubbles by the boiling film generated by the thermal energy applied by the electrothermal converter.

FIG. 7 shows a wiper unit 101 according to a first reference example related to the embodiment of the ink jet recording apparatus of the present invention. The wiper unit 101 includes a plurality of wipers 101a, 101b, 101c, 10
1d, and these wipers 101a, 101b, 1
01c and 101d consist of two kinds of wipers having different lengths, the wipers 101a and 101b have the same length, the wipers 101c and 101d have the same length, and the wiper 1
01a and 101b are somewhat shorter than wipers 101c and 101d. In addition, these wipers 101, 1
01b, 101c, and 101d have the same mounting position, and the contact condition of the wipers 101a and 101b at the lowest position of the recording head 1 and the recording head 1
So that the contact conditions of the wipers 101c and 101d at the highest position are substantially the same, specifically, the contact angle and the acting force are substantially the same.
The thicknesses of a, 101b, 101c and 101d are set.

Further, the contact angle can be made substantially the same by setting the thickness of the wiper so that the acting force of the wiper becomes substantially the same and appropriately configuring the tip shape.

Further, by appropriately setting the hardness of the wiper, it is possible to set the acting force to be almost the same. Therefore, by appropriately selecting the length, thickness, width, hardness, tip shape, etc. according to the height of the recording head, the contact conditions of the respective wipers with respect to the height of the recording head should be substantially the same. You can

FIG. 8 shows a wiper unit according to a second reference example related to the embodiment of the ink jet recording apparatus of the present invention. In this embodiment, the wiper 101b for cleaning the face surface shown in FIG. 7 is also used as the wiper 101d. Regarding the cleaning of the face surface, the performance of the recording head and the image quality depend on the wiping performance as compared with the cleaning of the nozzle. Since the influence is small, the combined use has no influence on the performance of the recording apparatus. In this case, since the number of wipers is small, the durability of the nozzles and face surface of the recording head 1 is improved.

FIG. 9 shows a wiper unit according to a third reference example related to the embodiment of the ink jet recording apparatus of the present invention. This is a case where the wipers 301a and 301b are configured to be in contact with each other with the absorber 302 sandwiched therebetween, and the wipers 301c and 301d are configured to be in contact with each other with the absorber 303 sandwiched therebetween. In this case, wiper 30
1a does not bend alone, but wipers 301a and 301b
And the whole absorber 302 is deformed, and a larger acting force is given. Moreover, the ink adhered to the wiper is cleaned by sandwiching the absorbers 302 and 303, and the ink is absorbed during the contact of the recording head 1, so that the ink scattering after the wiping is reduced.

FIG. 10 shows a wiper unit according to a fourth reference example related to the embodiment of the ink jet recording apparatus of the present invention. The wipers 401a and 401b and the wipers 401c and 401d are arranged separately in the moving direction of the carriage 3, and the position of the carriage 3 is changed according to the height of the recording head 1 to select the wiper for wiping. According to the height of the recording head 1, it is possible to perform wiping with only the optimum wiper, and the durability due to wiping is also improved. Furthermore, the wiping stroke is small and the processing time is shortened.

With respect to the height of the recording head, the position of the recording head position adjusting lever 15 or the position of the carriage shaft 4 may be detected by using a sensor or the like to change the position according to the height of the recording head 1. Alternatively, it may be set on a printer driver such as a computer, or may be set by providing a switch on the recording device.

FIG. 11 shows a wiper unit according to a fifth reference example of the ink jet recording apparatus of the present invention.

This reference example is the wiper unit 9 of FIG.
The wiper unit 501 is rotated 90 degrees with respect to
In the case where the wiper unit 501 is moved to the position (F1 in the drawing) retracted from the traveling area of the recording head 1, the carriage 3 is moved to the recovery unit position, and then the wiper unit 501 is recorded. The recording head 1 is wiped by moving to a traveling area (F2 in the drawing) of the head 1 and moving in a direction away from the carriage 3 and the recovery unit (G2 in the drawing). Ink scattering at the end of wiping becomes a non-recording area, and the recording medium 2
There is no scattering in the direction. The wiping direction differs from the wiping direction of FIG. 1 by 90 degrees. In this configuration, the width of the wiping mechanism can be reduced, and the device width can be reduced.

The present invention can be applied to an inkjet recording apparatus using a recording means (recording head) using an electrothermal converter such as a piezo element. The present invention has an excellent effect in an ink jet recording apparatus of a type that uses energy to eject ink. This is because such a system can achieve high density recording and high definition recording.

Regarding the typical structure and principle, for example, US Pat. No. 4,723,129 and US Pat.
What is done using the basic principles disclosed in US Pat. No. 40,796 is preferred. This method can be applied to both the so-called on-demand type and the continuous type. In particular, in the case of the on-demand type, it is possible to correspond to a sheet or a liquid path holding a liquid (ink). By applying at least one drive signal which corresponds to the recorded information and causes a rapid temperature rise exceeding film boiling to the arranged electrothermal converter, thermal energy is generated in the electrothermal converter, and recording is performed. This is effective because the film is boiled on the heat-acting surface of the means (recording head), and as a result, bubbles can be formed in the liquid (ink) in a one-to-one correspondence with this drive signal.

Due to the growth and contraction of the bubbles, the liquid (ink) is ejected through the ejection openings to form at least one droplet. It is more preferable to make this drive signal into a pulse shape, because the bubble growth and contraction are immediately and appropriately performed, so that the ejection of the liquid (ink) with excellent responsiveness can be achieved. As the pulse-shaped drive signal, U.S. Pat. Nos. 4,463,359 and 4,345,262 are used.
Those described in the specification are suitable. If the conditions described in US Pat. No. 4,313,124 of the invention relating to the rate of temperature rise on the heat acting surface are adopted, more excellent recording can be performed.

As the constitution of the recording head, in addition to the combination constitution of the nozzle, 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, the heat action is also applied. The present invention also includes a structure using the parts disclosed in US Pat. No. 4,558,333 and US Pat. No. 4,459,600, which disclose structures in which the parts are arranged in a bent region. Is. In addition, the present invention is also effective as a configuration based on Japanese Patent Application Laid-Open No. 59-1236780, which discloses a configuration in which a common slit is used as a discharge portion of the electrothermal conversion elements for a plurality of electrothermal conversion elements. . That is, according to the present invention, recording can be surely and efficiently performed regardless of the form of the recording head.

Further, the present invention can be effectively applied to a full line type recording head having a length corresponding to the maximum width of a recording medium which can be recorded by the recording apparatus. Such a recording head may have a configuration that satisfies the length by a combination of a plurality of recording heads or a configuration as one recording head integrally formed. in addition,
Even with the serial type as described above, the recording head is fixed to the main body of the device, or it can be attached to the main body of the device to make an electrical connection to the main body of the device or supply ink from the main body of the device The present invention is also effective when a chip type recording head or a cartridge type recording head in which an ink tank is integrally provided in the recording head itself is used.

Further, regarding the type or the number of recording heads mounted, for example, only one may be provided corresponding to a single color ink. That is, for example, the recording mode of the recording apparatus is not limited to the recording mode of only the mainstream color such as black, but the recording head may be integrally configured or a plurality of combinations may be used.
An apparatus provided with at least one of a mixed color of different colors or a full color by mixing colors is also very effective in the present invention.

In addition, in the above-described embodiments of the present invention, the ink is described as a liquid, but even an ink which solidifies at room temperature or lower, which softens or liquefies at room temperature, Alternatively, in the inkjet method, the temperature of the ink itself is generally adjusted within the range of 30 ° C. or higher and 70 ° C. or lower to control the temperature of the ink so that the viscosity of the ink is within the stable ejection range. Any liquid may be used as long as the ink is liquid. in addition,
Whether the temperature rise due to thermal energy is positively used as the energy for changing the state of the ink from the solid state to the liquid state, or the ink that solidifies when left standing for the purpose of preventing evaporation of the ink is used. In any case, the thermal energy such as the one in which the ink is liquefied by the application of the thermal energy according to the recording signal and the liquid ink is ejected, or the one which has already started to solidify when it reaches the recording medium. The present invention is also applicable to the case of using an ink that has a property of being liquefied for the first time.

The ink in such a case is described in JP-A-54-54.
As described in JP-A-56847 or JP-A-60-71260, it is opposed to the electrothermal converter in a state of being held as a liquid or solid in the recess or through hole of the porous sheet. It may be in any form.
In the present invention, the most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

In addition, as the form of the ink jet recording apparatus according to the present invention, besides the one used as an image output terminal of an image processing apparatus of an information processing apparatus such as a computer, a copying apparatus combined with a reader or the like, and further a transmission / reception function It may be in the form of a facsimile machine having a.

[0066]

As described above, according to the ink jet recording apparatus of the present invention, the second wiper having the same length as the first wiper is provided, and the distance between the recording head and the recording medium is set to the first value. The contact amount of the first wiper with respect to the recording head when the distance is 1 and the second amount with respect to the recording head when the distance between the recording head and the recording medium is the second distance.
Since the contact amount of the wiper is set to be substantially the same, the wiping of the contact pressure or the amount of deflection by the first wiper when the distance between the recording head and the recording medium is set to the first distance. The operating condition and the wiping operating condition by the second wiper when the distance between the recording head and the recording medium is the second distance are the same. Therefore, good wiping can be performed regardless of the mutual distance between the recording head and the recording medium. As a result, it is possible to obtain a remarkably excellent effect that good image quality can be maintained.

[0067]

[0068]

[0069]

[0070]

[0071]

[0072]

[0073]

[0074]

[0075]

[0076]

[Brief description of drawings]

FIG. 1 is a schematic plan view showing the overall configuration of an embodiment of an inkjet recording apparatus of the present invention.

FIG. 2 is a partial plan view showing the configuration of the wiper in the width direction of the embodiment of the present invention shown in FIG.

FIG. 3 is a cross-sectional view of an embodiment of the inkjet recording apparatus of the present invention.

FIG. 4 is a cross-sectional view of a distance switching unit for a recording medium of the recording head of the embodiment of the inkjet recording apparatus of the present invention.

5A and 5B are a cross-sectional view and a wiping state of a wiper unit of the inkjet recording apparatus of the present invention,
(A) is a diagram before wiping, (b) is a diagram at the start of wiping, and (c) is a diagram during wiping.

6A and 6B are a cross-sectional view and a wiping state of a wiper unit of the inkjet recording apparatus of the present invention,
(A) is a diagram before wiping, (b) is a diagram at the start of wiping, and (c) is a diagram during wiping.

FIG. 7 shows an example of an inkjet recording apparatus of the present invention.
It is a sectional side view which shows the wiper unit in the continuous 1st reference example .

Concerning the embodiment of an ink jet recording apparatus of the present invention; FIG
It is a sectional side view which shows the wiper unit in the 2nd reference example which continues.

FIG. 9 shows an example of an inkjet recording apparatus of the present invention.
It is a sectional side view which shows the wiper unit in the 3rd reference example which continues.

FIG. 10 shows an example of the inkjet recording apparatus of the present invention.
It is a sectional side view which shows the wiper unit in the related 4th reference example .

FIG. 11 shows an example of the ink jet recording apparatus of the present invention.
It is a sectional side view which shows the wiper unit in the related 5th reference example .

[Explanation of symbols]

1 recording head 2 recording media 3 carriage 4 Carriage axis 5 belt 6 Recovery Unit 7 cap 8 pumps 9 Wiper unit 10 Wiper guide 11 Platen 12 paper feed rollers 13 Paper ejection roller 14 Guide plate 15 Recording head position adjustment lever 16 frames 17 Wiper cleaner support plate 18 wiper cleaner

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-4-187445 (JP, A) JP-A-3-222754 (JP, A) JP-A-7-171967 (JP, A) JP-A-6- 270413 (JP, A) JP-A-2-198859 (JP, A) JP-A-2-18055 (JP, A) JP-A-7-276620 (JP, A) JP-A-8-20112 (JP, A) (58) Fields surveyed (Int.Cl. ⁷ , DB name) B41J 2/01 B41J 2/165

Claims (4)

(57) [Claims] 1. An inkjet recording apparatus for performing recording by ejecting ink from a recording head to a recording medium, and a switching mechanism for switching a distance between the recording head and the recording medium, and a first wiping unit for the recording head. And a second wiper that has the same length as the first wiper and wipes the recording head after the first wiper wipes the recording head. When the distance is set to the first distance, the contact amount of the first wiper with respect to the recording head is smaller than the contact amount of the second wiper, and when the distance is set to the first distance, The contact amount of the first wiper with respect to the recording head and the recording head when the distance is set to a second distance larger than the first distance. An ink jet recording apparatus characterized by the abutment of the serial second wiper is set to be substantially the same. 2. The first wiper is for cleaning nozzles of the recording head, and the second wiper is for cleaning the face surface of the recording head. The inkjet recording apparatus according to claim 1. 3. The ink jet recording apparatus according to claim 2, further comprising a plurality of the second wipers. 4. The inkjet recording apparatus according to claim 3, further comprising a plurality of the first wipers.