JP2002234172A - Ink jet recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute a wiper so that a foreign matter at a nozzle opening face is removed without decreasing the durability of an ink repellency process of the nozzle opening face. SOLUTION: A wiper member 51 has a first wiper member 52 and a second wiper member 53 formed integrally. At a normal wiping time, the nozzle opening face 24a is rubbed with the use of the first wiper member 52. Therefore, the nozzle opening face 24a is rubbed to remove the foreign matter by a smaller rubbing force at the normal wiping time than at a strong wiping time. Effects onto the ink repellency process of the nozzle opening face 24a are lessened and the good durability of the ink repellency process is exerted. At the strong wiping time, the nozzle opening face 24a is rubbed with the use of the second wiper member 53 more strongly than at the normal wiping time, and even the persistent foreign matter such as ink being solidified to the nozzle opening face 24a, or the like can be removed surely.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an ink jet recording apparatus.

[0002]

2. Description of the Related Art Conventionally, a recording apparatus such as a printer that performs recording on a recording medium such as paper or an OHP sheet is provided with a recording head for performing a recording operation on the recording medium. As such a recording head, for example, an ink jet head, a dot impact type head, a thermal transfer type head, and the like can be mentioned. Among them, the ink jet head has a relatively simple structure, high-speed printing, and easy high-quality printing. Also known as a recording head.

An ink jet head has a nozzle opening surface in which a plurality of nozzles for ejecting ink are formed. If foreign matter such as ink or dust adheres to the nozzle opening surface near the nozzle, the flight direction of the ink droplet ejected from the nozzle changes, the ink does not eject from the nozzle, or the ink ejection is not suitable for printing. In a case such as a state, an ink ejection recovery process for removing the cause of the ink ejection failure is performed.

As means for performing such an ink jet recovery process, there is a wiper means for removing foreign matter such as ink and dust adhered to the nozzle opening surface by rubbing the nozzle opening surface of the ink jet head.

[0005]

However, when the wiper means rubs strongly against the nozzle opening surface, foreign matter on the nozzle opening surface can be removed cleanly.
Usually, the ink-repellent treatment is performed, and there is a problem that the ink-repellent film is easily peeled off when strongly rubbed, resulting in poor durability. In addition, if the sliding force of the wiper means on the nozzle opening surface is weakened, there is a problem that foreign matter cannot be removed if the ink solidifies on the nozzle opening surface.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and has a wiper configuration for removing foreign matter from the nozzle opening surface without reducing the durability of the ink-repellent treatment on the nozzle opening surface. It is an object to provide an ink jet recording apparatus.

[0007]

In order to achieve the above object, according to the first aspect of the present invention, there is provided a recording head for ejecting ink from a nozzle to perform recording on a recording medium, and a recording head having a nozzle opening surface. In an ink jet recording apparatus having wiper means for rubbing, and control means for relatively moving the wiper means and the recording head to rub the wiper means against the nozzle opening surface, the wiper means comprises:
A first wiper member, and a second wiper member, the force of rubbing the nozzle opening surface of the recording head being stronger than the first wiper member.
A wiper member, wherein the control means rubs the nozzle opening surface using the first wiper member during normal wiping, and uses the second wiper member to rub the nozzle opening surface during normal wiping during strong wiping. It is characterized by rubbing more strongly.

According to this structure, the nozzle opening surface is rubbed with the first wiper member at the time of normal wiping. Therefore, at the time of normal wiping, the nozzle opening surface is rubbed with a smaller sliding force than at the time of strong wiping. To remove foreign matter. Then, at the time of strong wiping, the second wiper member is used to rub the nozzle opening surface more strongly than at the time of normal wiping, so that foreign matter such as ink that has clumped to the nozzle opening surface is reliably removed.

According to a second aspect of the present invention, in the first aspect of the present invention, the wiper means moves the first wiper member and the second wiper member in the direction of contact and separation with respect to the nozzle opening surface. Moving means, wherein the first wiper member has a longer length on the nozzle opening surface side than the second wiper member, and the control means determines that only the first wiper member has the nozzle opening surface during normal wiping. The moving means is controlled so as to rub against the nozzle, and the moving means is controlled such that the first wiper member and the second wiper member rub against the nozzle opening surface at the time of strong wiping. .

According to such a configuration, since the first wiper member and the second wiper member have different lengths on the side of the nozzle opening surface, the control means only controls the moving means. In normal wiping, the first
Only the wiper member is rubbed against the nozzle opening surface, and at the time of strong wiping, the first wiper member and the second wiper member are rubbed against the nozzle opening surface.

According to a third aspect of the present invention, in the second aspect, the first wiper member and the second wiper member are integrally formed.

According to such a configuration, since the first wiper member and the second wiper member are integrated, the manufacture thereof is facilitated.

According to a fourth aspect of the present invention, in the third aspect of the invention, the first wiper member is provided with the second wiper member.
It is characterized by projecting from the tip of the wiper member.

According to such a configuration, since the first wiper member is a portion protruding from the tip of the second wiper member, the first wiper member slides in the direction in which the wiper means slides on the nozzle opening surface. The wiper member and the second wiper member are formed without a gap, and the thickness of the wiper member can be reduced.

According to a fifth aspect of the present invention, in the second aspect of the invention, the first wiper member and the second wiper member are formed as separate members.

According to this structure, the first wiper member and the second wiper member can be formed of different materials, so that the degree of freedom in design is improved.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a color inkjet printer as an inkjet recording apparatus of the present invention. In FIG. 1, the color inkjet printer 21 is used to print on an ink cartridge 22 as an ink supply member filled with four color inks of cyan, magenta, yellow, and black, respectively, and a sheet 23 as a recording medium. A head unit 25 having an inkjet head 24 as a recording head, a carriage 26 as a support member on which the ink cartridge 22 and the head unit 25 are mounted, and a drive unit 27 for reciprocating the carriage 26 in a linear direction. Carriage 2
6, a platen roller 28 extending in the reciprocating direction of the ink jet head 24 and opposed to the inkjet head 24;
0 and a purge device 29.

The drive unit 27 includes a carriage shaft 30 disposed at the lower end of the carriage 26 and extending parallel to the platen roller 28, a guide plate 31 disposed at the upper end of the carriage 26 and extending parallel to the carriage shaft 30, Two pulleys 32 and 33 are provided between the shaft 30 and the guide plate 31 and at both ends of the carriage shaft 30, and an endless belt 34 is stretched between the pulleys 32 and 33. .

At the lower end of the carriage 26, there is provided a carriage shaft support 35 through which the carriage shaft 30 can be inserted, and at the upper end of the carriage 26, a guide plate 3 is provided.
1 is provided with a guide plate contact portion 36 that can contact with the guide plate 1.
An endless belt 34 is joined to the rear side surface of the carriage 26.

When one of the pulleys 32 is rotated forward and backward by the drive of the carriage motor 32A, the carriage 26 joined to the endless belt 34 is moved in accordance with the forward and reverse rotation of the pulley 32. The paper 23 is reciprocated linearly along the guide plate 31 along the width direction of the paper 23.

The paper 23 is fed from a paper feed cassette (not shown) provided on the side of the ink jet printer 21, and has a nozzle opening surface 24a of the ink jet head 24 facing downward in the vertical direction, and a platen roller. 28, the ink is ejected from a plurality of nozzles of the ink jet head 24 to perform predetermined recording, and thereafter, the sheet is discharged. In FIG. 1,
The illustration of the paper feed mechanism and the paper discharge mechanism for these sheets 23 is omitted. The nozzle opening surface 24a is subjected to an ink-repellent treatment.

On the side of the platen roller 28, there is provided a wiper means 50 for rubbing the nozzle opening surface 24a of the ink jet head 24 to remove ink, dust and the like adhering to the nozzle opening surface 24a. A purge device 29 is provided beside the wiper means 50, and is disposed so as to face the nozzle opening surface 24a of the inkjet head 24 when the head unit 25 is at the reset position. The purging device 29 is used to prevent ejection failure due to stagnation of ink or growth of bubbles when ink is initially introduced into the inkjet head 24. That is, the purge device 29
A suction cap 41 that can cover the nozzles of the inkjet head 24, a suction pump 38 and a cam 39, and a waste ink storage unit 40 are provided. When the head unit 25 is at the reset position, the cam 39 is moved by a suction motor (not shown). By driving the suction cap 41 to abut the nozzle opening surface 24 a of the ink jet head 24 to cover the nozzle with the suction cap 41, the defective ink including air bubbles and the like accumulated inside the ink jet head 24 is driven by the cam 39 to drive the pump 38. Thus, the ink jet head 24 is recovered by suction. Accordingly, it is possible to perform an ink ejection recovery process for preventing a discharge failure or the like due to ink stagnation or bubble growth during initial ink introduction. The sucked defective ink is stored in the waste ink storage unit 40.

The purging device 29 is provided with a protective cap 37 for each color on the side of the suction cap 41 so as to cover the nozzle for each color. When the head unit 25 is at the stop position, the ink jet head 24 is closed. , And is configured to cover the nozzles of all the colors.

Next, the configuration of the wiper means 50 will be described. As shown in FIG. 2, the wiper means 50 includes a wiper member 51 that rubs against the nozzle opening surface 24a, a wiper holder 58 that supports the wiper member 51, and a wiper holder 58 that comes into contact with and separates from the nozzle opening surface 24a. Moving means 61 that can move in the direction.

The wiper member 51 is made of a rubber material,
For example, it is formed by molding using EPDM,
As shown in FIG. 3, the first wiper member 52 and the second wiper member 53 are formed integrally. The first wiper member 52 extends from the tip of the second wiper member 53.
The second wiper member 53 is formed to be thicker than the first wiper member 52 in the sliding direction of the nozzle opening surface 24 a by the wiper member 51. Therefore, the force of rubbing the nozzle opening surface 24 a is stronger in the second wiper member 53 than in the first wiper member 52.

As shown in FIG. 2, the second wiper member 53
Is supported by the wiper holder 58 at the other end. The wiper holder 58 is fitted in a guide groove 73 formed in the housing 71 of the moving means 61, and is movable along the guide groove 73 in the direction of coming and going with respect to the nozzle opening surface 24a. A projection (not shown) formed on the wiper holder 58 has a cam plate 60 rotatably supported by the housing 71.
The cam groove 63 is fitted. A slit 65 is formed in the cam plate 60, and an origin detection sensor 6 that detects the slit 65 and detects the origin position of the cam plate 60.
7 is attached to the housing 71. Further, a wiper motor (not shown) is attached to the housing 71, and the gear portion 62 of the cam plate 60 meshes with a motor gear 69 fixed to a shaft of the wiper motor.

A CPU (not shown) controls the entire color ink jet printer 21 based on a program stored in a ROM (not shown), and controls, for example, the carriage motor 32A, suction motor, wiper motor, and the like. The programs and the CPU in the ROM correspond to the control means of the present invention.

An ink jet recovery process using the wiper means 50 having such a configuration will be described. This ink ejection recovery processing is performed by a program in the ROM and the CPU.
However, the control is performed by controlling the carriage motor 32A, the suction motor, and the wiper motor.

Then, when the operation is performed periodically, or when the recording is not performed, or when the ink ejection recovery process is performed before and the time has not passed much, the normal wipe is performed. At the time of the normal wipe, as shown in FIG.
It is arranged at a predetermined position not opposed to 1. Then, the wiper motor is driven, and the motor gear 69 and the cam plate 60 are driven.
Rotates, and the wiper holder 58 having the protrusion fitted into the cam groove 63 moves along the guide groove 73 in a direction approaching the nozzle opening surface 24a side (the direction of arrow A in FIG. 3B). The first wiper member 52 is connected to the nozzle opening surface 24a.
, And the second wiper member 53 is connected to the nozzle opening surface 2.
The wiper member 51 is moved to a position where the wiper member 51 cannot be brought into contact with the wiper member 4a and stopped at that position.

In this state, the carriage motor 32A is driven to move the ink jet head 24 to the wiper member 51.
The ink jet head 24 is moved in the direction (arrow B direction shown in FIG. 3 (c)), and only the first wiper member 52 is rubbed against the nozzle opening surface 24a.
Foreign matter such as ink and dust adhered to the surface is removed. afterwards,
The wiper member 51 is moved to a separated position (a position shown in FIG. 3A) where the wiper member 51 cannot contact the nozzle opening surface 24a.

Next, when no printing has been performed for a long time or when a long time has elapsed since the ink ejection recovery processing was performed before, a strong wipe is performed. At the time of the strong wiping, as shown in FIG.
It is arranged at a predetermined position not facing the wiper member 51.
Then, the wiper motor is driven, and the wiper holder 58 moves along the guide groove 73 in the direction approaching the nozzle opening surface 24a (the direction of arrow A in FIG. 4B).
Then, the first wiper member 52 and the second wiper member 5
The wiper member 51 is moved to a position where the wiper member 3 can contact the nozzle opening surface 24a, and stopped at that position.

In this state, the carriage motor 32A is driven to move the ink jet head 24 to the wiper member 51.
The ink-jet head 24 is moved in the direction (arrow B direction shown in FIG. 4C), and the first wiper member 52 and the second wiper member 53 are rubbed against the nozzle opening surface 24a and adhere to the nozzle opening surface 24a. Remove foreign substances such as ink and dust. Thereafter, the wiper member 51 is moved to a separated position (a position shown in FIG. 4A) where the wiper member 51 cannot contact the nozzle opening surface 24a.

As described above, at the time of normal wiping, the nozzle opening surface 24a is rubbed using the first wiper member 52. Therefore, at the time of normal wiping, the nozzle opening surface 24a is rubbed with a smaller sliding force than at the time of strong wiping. The foreign matter is removed by rubbing. Therefore, the effect on the ink-repellent treatment of the nozzle opening surface 24a is small, and the durability of the ink-repellent treatment is good. Also,
At the time of strong wiping, the second or third wiper member 53 is used to rub the nozzle opening surface 24a more strongly than at the time of normal wiping.
Stubborn foreign matter, such as ink, which has been solidified on the nozzle opening surface 24a can be reliably removed. Accordingly, the rubbing force on the nozzle opening surface 24a is different between the normal wiping and the strong wiping.
In addition to reducing the effect of the nozzle opening surface 24a on the ink-repellent treatment, it is also possible to remove foreign matter firmly attached to the nozzle opening surface 24a.

The first wiper member 52 and the second wiper member 53 have different lengths on the nozzle opening surface 24a side (projection amounts with respect to the nozzle opening surface 24a side in a direction intersecting the sliding direction). By simply controlling the position of the wiper member 51 with respect to the nozzle opening surface 24a, only the first wiper member 52 can be rubbed against the nozzle opening surface 24a during normal wiping, and the first wiper member 52 and the second wiper can be rubbed during strong wiping. The member 53 is connected to the nozzle opening surface 24.
a, and the rubbing force on the nozzle opening surface 24a can be easily made different between the normal wiping and the strong wiping with a simple configuration.

Further, since the first wiper member 52 and the second wiper member 53 are formed integrally, their manufacture is easy.

Since the first wiper member 52 protrudes from the tip of the second wiper member 53, the first wiper member 52 slides in the direction in which the wiper member 51 rubs the nozzle opening surface 24a.
The first wiper member 52 and the second wiper member 53 are formed without a gap, and the thickness of the wiper member 51 can be reduced as compared with the case where the gap is provided (as shown in FIG. 5 described below). it can.

Next, another embodiment will be described. still,
The same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 5, the wiper member 81 is
The first wiper member 82 and the second wiper member 8 are formed by molding using a rubber material, for example, EPDM.
3 are integrally formed. The first wiper member 82 and the second wiper member 83 each extend from the distal end of the base 85, and the first wiper member 82 is connected to the second wiper member 83.
The nozzle opening surface 24a side is longer than that. A gap is formed between the first wiper member 82 and the second wiper member 83 in the sliding direction of the nozzle opening surface 24a by the wiper member 81. The second wiper member 83 is formed to be thicker than the first wiper member 82 in the sliding direction of the nozzle opening surface 24 a by the wiper member 81. Therefore, the nozzle opening surface 24a
The second wiper member 83 has a stronger sliding force on the second wiper member 83 than the first wiper member 82. The other end of the base 85 is supported by the wiper holder 58.

The wiper member 81 configured as shown in FIG. 5 has the same effect as the wiper member 51.

Next, another embodiment will be described.
Note that the same parts as those in the above embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 6, the wiper member 91 is
It is formed by molding using a rubber material, and the first wiper member 92 and the second wiper member 93 are formed as separate members. The first wiper member 92 has a longer nozzle opening surface 24a side than the second wiper member 93.
Further, in the direction in which the wiper member 91 rubs the nozzle opening surface 24a, the first wiper member 92 and the second wiper member 93 are in close contact with each other, and between the first wiper member 92 and the second wiper member 93. A gap is formed.
In the sliding direction of the nozzle opening surface 24 a by the wiper member 91, the thickness of the second wiper member 93 is formed to be thicker than the thickness of the first wiper member 92. Therefore, the second wiper member 93 has a stronger force to rub against the nozzle opening surface 24 a than the first wiper member 92. The opposite side of the first wiper member 92 and the second wiper member 93 from the nozzle opening surface 24a is the wiper holder 58.
Supported by

The wiper member 91 configured as shown in FIG. 6 has the same effect as the wiper member 51.

In other words, the nozzle opening surface 24a is rubbed with the first wiper member 92 during normal wiping. Therefore, during normal wiping, the nozzle opening surface 24a is rubbed with a smaller sliding force than during strong wiping. Foreign matter is removed. Therefore, the effect on the ink-repellent treatment of the nozzle opening surface 24a is small, and the durability of the ink-repellent treatment is good. Further, at the time of strong wiping, the nozzle opening surface 24a is formed using the second wiper member 93.
Is more strongly rubbed than at the time of normal wiping, so that stubborn foreign matter such as ink that has been solidified on the nozzle opening surface 24a can be reliably removed. Therefore, since the rubbing force on the nozzle opening surface 24a is different between the normal wiping and the strong wiping, the influence on the ink-repellent treatment of the nozzle opening surface 24a is reduced as compared with the case of always rubbing strongly. At the same time, it is possible to remove foreign matter stubbornly attached to the nozzle opening surface 24a.

Since the first wiper member 92 and the second wiper member 93 have different lengths on the side of the nozzle opening surface 24a, only the position of the wiper member 91 with respect to the nozzle opening surface 24a is controlled. When wiping, the first
Only the wiper member 92 can be rubbed against the nozzle opening surface 24a, and the first wiper member 92 and the second
The wiper member 93 can be rubbed against the nozzle opening surface 24a, and the rubbing force on the nozzle opening surface 24a can be easily made different between a normal wipe and a strong wipe with a simple configuration.

Further, since the first wiper member 92 and the second wiper member 93 are formed as separate members, the first wiper member 92 and the second wiper member 93 can be formed of different materials. Not only the rubbing force can be changed depending on the thickness of the wiper member, but also the rubbing force of each wiper member can be changed with the same thickness, thereby improving the degree of freedom in design.

In this embodiment, one wiper member rubs the nozzle opening surface 24a during normal wiping, and two wiper members slide the nozzle opening surface 24a during strong wiping. It is sufficient that the rubbing force on the nozzle opening surface 24a is larger during the strong wiping than during the normal wiping. For example, the wiping member rubs the nozzle opening surface 24a with one wiper member having a weak rubbing force during the normal wiping.
At the time of strong wiping, the nozzle opening surface 24a may be rubbed with one wiper member having a strong rubbing force. good.

In this embodiment, the head unit is moved while the wiper member is stopped at a position where the wiper member can be slid on the nozzle opening surface, and the nozzle opening surface is rubbed by the wiper member. However, with the head unit stopped, the wiper member may be rotated, for example, to rub against the nozzle opening surface.

Further, in the present embodiment, the wiper means corresponding to the ink jet head 24 ejecting a plurality of colors of ink is used, but the wiper means corresponding to the ink jet head ejecting a single color ink may be used.

Although the nozzle opening surface 24a of the ink jet head 24 is directed downward, it may be directed obliquely downward, or may be directed horizontally (horizontally).

In the present embodiment, the wiper means 5
Although the ink ejection recovery process is performed using only 0, the ink ejection recovery process may be performed using the purge device 29 and the wiper unit 50. In this case, in the normal ink ejection recovery process, the suction pump 38 is operated so as to suck the defective ink from the nozzle via the suction cap 41 so that the suction force is smaller or the number of suction times is smaller than in the strong ink ejection recovery process, Thereafter, the first wiper member is used to wipe the ink. In the strong ink ejection recovery process, the suction pump 38 is operated so that the suction force is higher or the number of times of suction is larger than that in the normal ink ejection recovery process, and the nozzle is moved through the suction cap 41 through the nozzle. The defective ink may be sucked and then wiped by the first wiper member and the second wiper member.

[0051]

As is apparent from the above description,
According to the first aspect of the present invention, the nozzle opening surface is rubbed with the first wiper member at the time of normal wiping, and the nozzle opening surface is rubbed with the second wiper member at the time of strong wiping. Rubs strongly, so that during normal wiping, the effect on the nozzle opening surface is small, and the durability of the ink repellent treatment on the nozzle opening surface is good. Can also be reliably removed.

According to the second aspect of the present invention, the first
Since the wiper member and the second wiper member have different lengths on the side of the nozzle opening surface, the control unit includes:
Only by controlling the moving means, at the time of normal wiping, only the first wiper member is rubbed against the nozzle opening surface, and at the time of strong wiping, the first wiper member and the second wiper member are moved to the nozzle opening surface. It can be rubbed, has little effect on the nozzle opening surface during normal wiping, and has good durability of the ink-repellent treatment on the nozzle opening surface, and foreign matter such as ink that has solidified on the nozzle opening surface during strong wiping. Can also be reliably removed.

According to the third aspect of the present invention, the first
Since the wiper member and the second wiper member are integrated, the manufacture of the wiper member can be easily performed.

According to the fourth aspect of the present invention, the first
Since the wiper member is a portion protruding from the tip of the second wiper member, the first wiper member and the second wiper member are formed without a gap in the direction in which the wiper means rubs the nozzle opening surface. Thus, the thickness of the wiper member can be reduced.

According to the fifth aspect of the present invention, since the first wiper member and the second wiper member are formed as separate members, the first wiper member and the second wiper member are separated from each other. Since it can be formed of different materials, the degree of freedom in design is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a color inkjet printer as an inkjet recording apparatus of the present invention.

FIG. 2 is an explanatory diagram showing a wiper unit.

FIG. 3A is an explanatory diagram illustrating a state in which a wiper member is separated from a nozzle opening surface during normal wiping.
(B) is an explanatory view showing a state where the wiper member has approached the nozzle opening surface during normal wiping. (C)
FIG. 9 is an explanatory diagram illustrating a state in which the first wiper member rubs against the nozzle opening surface during normal wiping.

FIG. 4A is an explanatory diagram illustrating a state in which a wiper member is separated from a nozzle opening surface during strong wiping.
(B) is an explanatory view showing a state in which the wiper member has approached the nozzle opening surface during strong wiping. (C)
FIG. 5 is an explanatory diagram illustrating a state in which a first wiper member and a second wiper member rub against the nozzle opening surface during a strong wipe.

FIG. 5 is an explanatory diagram of a wiper member according to another embodiment.

FIG. 6 is an explanatory diagram of a wiper member according to another embodiment.

DESCRIPTION OF SYMBOLS 24 Inkjet head 24a Nozzle opening surface 50 Wiper means 51, 81, 91 Wiper member 52, 82, 92 First wiper member 53, 83, 93 Second wiper member 58 Wiper holder 61 Moving means

Claims (5)

[Claims] A recording head for ejecting ink from a nozzle to perform recording on a recording medium; a wiper for rubbing a nozzle opening surface of the recording head; and a relative movement between the wiper and the recording head. A control means for rubbing the wiper means against the nozzle opening surface, wherein the wiper means comprises: a first wiper member; and a force for rubbing the nozzle opening surface of the recording head is the first force. A second wiper member stronger than the wiper member, wherein the control means rubs the nozzle opening surface using the first wiper member during normal wiping, and uses the second wiper member during strong wiping. An ink jet recording apparatus characterized in that the nozzle opening surface is rubbed more strongly than during normal wiping. 2. The wiper unit includes a moving unit that moves the first wiper member and the second wiper member in a direction of coming and going with respect to the nozzle opening surface, and the first wiper member includes the second wiper. The length of the nozzle opening side is longer than that of the member, and the control unit controls the moving unit so that only the first wiper member rubs against the nozzle opening surface during normal wiping, and during strong wiping. 2. An ink jet recording apparatus according to claim 1, wherein said moving means is controlled so that said first wiper member and said second wiper member rub against said nozzle opening surface. 3. The ink jet recording apparatus according to claim 2, wherein the first wiper member and the second wiper member are formed integrally. 4. The ink jet recording apparatus according to claim 3, wherein the first wiper member protrudes from a tip of the second wiper member. 5. The ink jet recording apparatus according to claim 2, wherein the first wiper member and the second wiper member are formed as separate members.