JP2001063101A - Ink jet recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a tube from being deformed, to dispense with a sensor, to prevent enlarging of this device itself and raising of the cost and to use a clutch mechanism. SOLUTION: This ink jet recorder comprises a recording head having a plurality of nozzle sections each ejecting ink in accordance with image information and a suction pump 50 for sucking ink by being connected to the nozzle sections through a tube. The suction pump 50 is of a type of a tube pump 5 that performs the sucking by pressing and deforming a tube 54 communicating to the tube by means of a plurality of pressing rollers 521, 522 and the tube pump 5 is equipped with a moving member 55 that moves the pressing rollers 521, 522 to positions where the pressing rollers 521, 522 do not press the tube 54 during the non-operating period of time. The moving member 55 is driven by a driving system different from a driving system of the tube pump 5 and is rotated in a direction same as the rotational direction for sucking of the tube pump 5 so that the pressing rollers 521, 522 are moved to the non-pressing positions.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording head having a plurality of nozzles for ejecting ink in accordance with image information, a cap member for covering the nozzles, and a cap member connected to the cap member for sucking ink. The present invention relates to an ink jet recording apparatus that forms an image by causing ink to fly on a recording medium, the suction recording apparatus including a suction pump.

[0002]

2. Description of the Related Art In a conventional first ink jet recording apparatus, a suction pump for sucking ink is used in order to recover non-discharge of ink from a nozzle portion and other problems. In particular, a tube pump that generates suction by pressing a tube with a pressure roller is relatively simple,
It was frequently used as a recovery means because it could be implemented with an inexpensive configuration.

As shown in FIG. 8, a conventional second ink jet recording apparatus (Japanese Unexamined Patent Application Publication No. 4-133750) uses a sensor S to release a tube press when not in use to a position where a press roller is not pressed. A method has been proposed in which the tube can be stopped to prevent damage to the tube without contact between the pressure roller and the tube when the pump is not operating.

Further, in the third conventional ink jet recording apparatus (JP-A-4-169240), the shape of the guide G of the pump body is devised as shown in FIG. For example, a device that releases the pressing of the pressure roller C is described.

[0005]

In the above-mentioned first conventional ink jet recording apparatus, since the tube pump operates by squeezing the tube by the pressure roller, the tube is pressed by the pressure roller when not operating. If it is left crushed, the tube will be deformed and it will not be possible to obtain the predetermined suction pressure, etc., and it will be impossible to recover the non-ejection of ink from the nozzles and to fill the nozzles with ink. There was a problem that became a problem.

In order to solve the above problem, the conventional second ink jet recording apparatus in which the tube pump is provided with a position detecting means such as a sensor can stop at a position where the pressure roller does not press the tube by the sensor S. Therefore, it is necessary to secure a position where the pressure roller does not press the tube, that is, a position where the pressure roller does not come into contact with the tube. Also, in one rotation of the pump, it becomes possible to communicate with the atmosphere, and a high pressure required when ink is not ejected or bubbles are removed from the nozzle portion cannot be obtained. It is necessary to enlarge the pump itself or provide a valve in the flow path of the pump,
There is a problem that the size of the apparatus itself is increased, and the cost becomes high because a sensor or the like is used.

Further, in the third conventional ink jet recording apparatus, the shape of the guide G of the pump body is devised, and the pressing of the pressure roller C is released by rotating the tube pump body in reverse to the suction operation rotation. From
It is necessary to reverse the rotation of the tube pump body and the rotation of the suction operation. Therefore, two independent rotation driving sources are prepared, or when rotating by one rotation driving source, a reverse rotation mechanism is interposed. There was a problem that needed to be done.

Further, a clutch mechanism is interposed between a rotary disk constituting the tube pump body and a drive shaft which is rotationally driven by a motor as a rotary drive source for driving the rotary disk, so that the tube pump is brought into a non-pressed state. When energized, there is a problem that the clutch mechanism cannot be used because the energization cannot be performed even if the motor is reversely rotated by the clutch mechanism.

Therefore, the present inventor has proposed a recording head having a plurality of nozzles for ejecting ink in accordance with image information,
In an ink jet recording apparatus provided with a cap member for covering the nozzle portion and a suction pump connected to the cap member for sucking ink, a tube constituting the suction pump is pressed and deformed by a pressurizing section to perform suction. Focusing on the technical idea of the present invention, in which the tube pump moves in the same direction as the suction operation direction of the tube pump during non-operation, thereby moving the pressurizing section to a non-pressing position where the tube is not pressed. As a result of further research and development, we have prevented tube deformation, eliminated the need for a sensor, prevented the device itself from increasing in size and cost, and made the movement of the tube pump body and the suction operation in the same direction. This eliminates the need for two independent rotary drive sources and a reverse rotation mechanism, and enables the use of a clutch mechanism. It has reached the present invention to achieve the object.

[0010]

According to an aspect of the present invention, there is provided an ink jet recording apparatus comprising: a recording head having a plurality of nozzles for ejecting ink in accordance with image information; In an ink jet recording apparatus provided with a suction pump for sucking ink connected to the, the suction pump is configured by a tube pump that performs suction by deforming the tube by pressing and deforming the tube,
A moving member for moving the pressurizing unit to a non-pressing position where the tube is not pressed by moving in the same direction as the suction operation direction of the tube pump during non-operation.

In the ink jet recording apparatus according to the present invention (second aspect of the present invention), in the first aspect, the suction pump is constituted by a tube pump for performing suction by deforming a tube by pressing and deforming the tube with a pressure roller. And a moving member that rotates in the same direction as the suction rotation direction of the tube pump when not in operation.

In an ink jet recording apparatus according to a third aspect of the present invention, in the second aspect, the pressure roller is always urged to a tube pressing position by an elastic member. is there.

[0013]

In the ink jet recording apparatus according to the first aspect of the present invention, the moving member is in the same direction as the suction operation direction of the tube pump when the tube pump constituting the suction pump is not operating. By moving, the pressurizing unit is moved to a non-pressing position where the tube is not pressed, so that deformation of the tube is prevented, a sensor is not required, and an increase in size and cost of the apparatus itself are prevented, and By making the movement of the pump body and the movement of the suction operation in the same direction, it is possible to eliminate the need for two independent rotation drive sources and the reverse rotation mechanism, and to use the clutch mechanism.

In the ink jet recording apparatus according to a second aspect of the present invention, in the first aspect, the moving member rotates in the same direction as the suction rotation direction of the tube pump when the tube pump is not operating. By preventing deformation of the tube, eliminating the need for a sensor, preventing an increase in the size and cost of the apparatus itself, and by rotating in the same direction as the suction rotation direction of the tube pump body, two independent rotation driving sources and This has the effect of eliminating the need for a reverse rotation mechanism and enabling the use of a clutch mechanism.

In the ink jet recording apparatus according to a third aspect of the present invention, in the second aspect, the pressure roller is constantly urged to the tube pressing position by the elastic member, so that the pressed state of the tube is changed. This has the effect of ensuring reliability and alleviating the driving load for pressing the tube.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the drawings.

(Embodiment) As shown in FIGS. 1 to 5, the ink jet recording apparatus of this embodiment comprises a recording head 1 having a plurality of nozzles 11 for ejecting ink in accordance with image information, and a tube 4. Through the nozzle portion 11
In an ink jet recording apparatus provided with a suction pump 50 for sucking ink, the suction pump 50 performs suction by deforming a tube 54 communicating with the tube 4 by a plurality of pressure rollers 521 and 522. In the tube pump 5, when the tube pump 5 is not operating, the pressure rollers 521 and 522 are
4 is provided with a moving member 55 for moving the tube pump 5 to a position where the tube pump 5 is not pressed. The moving member 55 is driven by a system different from the driving system of the tube pump 5 and rotates in the same direction as the suction rotation direction of the tube pump 5. The pressing roller 5
21 and 522 are moved to the non-pressing position.

The configuration of the tube pump 5 in the present embodiment is such that the tube 5 is disposed along the arc-shaped inner wall surface of the pump housing 53 in which a part of the inner wall surface is formed in an arc shape.
4 and pressing rollers 521 and 52 for pressing the tube 54
2, supporting the pressure rollers 521 and 522, and transmitting the drive from a motor (not shown) to
Pump body 51 that rotates 522 in the suction operation direction
Composed of

The supporting portion of the pump body 51 for the pressure roller is constituted by guide grooves 511 and 512 formed so that the pressure rollers 521 and 522 can move to the pressing position and the non-pressing position of the tube 54. I have.

The pressure rollers 521 and 522 are always urged by the elastic members 561 and 562 toward the tube pressing positions of the guide grooves 511 and 512.

At the bottom of the pump housing 53, as a moving member 55 for moving the pressure rollers 521, 522 to the tube non-pressing position, the pressure roller 5
21 and 522 are provided with a disc member arranged in a state capable of engaging with them. An engaging member 7 for operating the disk member is disposed near the disk member.

One of the tubes 54 in the tube pump 5 is connected to a nozzle 11 for sucking and flying the ink of the recording head 1, and the other is a waste ink absorber 6 provided with a waste ink absorber 6. Connected to the ink tank side.

The operation of releasing the tube pressing of the pressure rollers 521, 522 according to the present embodiment having the above configuration will be described with reference to FIGS.

During the suction operation, as shown in FIG. 4A, the pressure rollers 521 and 522 are connected to the guide grooves 511 and 511, respectively.
It is located at a pressing position of 512 and performs a suction operation in accordance with the rotation operation of the pump body 51.

Then, after the suction operation is completed, a pressing release operation is performed. First, after the pump stops, the engaging member 7 for operating the disk member is moved so as to engage with the disk member as the moving member 55, and only the disk member is rotated in the same direction as the suction operation direction. . Thereby, the pressure rollers 521, 522
Are pushed by the disk member and are guide grooves 511, 512.
Along the direction away from the tube 54 to release the pressing of the tube 54. (See Fig. 4)

Next, the operation when the pressing state is changed from the releasing state to the pressing state will be described. First, even in the released state, the pressure rollers 521 and 522 are urged by the elastic members 561 and 562 toward the pressing position side of the guide grooves 511 and 512, and the pressure rollers 521 and 522 are balanced by the repulsive force of the tube 54. The state where the tube 54 is not crushed is maintained.

When the pump is rotated in the suction operation direction from this state, the pressure rollers 521 and 522 also start moving in the same direction and move to a region where the tube 54 does not exist. At this time, the balance described above is lost, and the pressure rollers 521 and 522 are moved to the pressing positions of the guide grooves 511 and 512 by the elastic members 561 and 562 to be in a suckable state. (See Fig. 5)

Therefore, in the present embodiment, during the suction operation and during the non-suction operation, the above operation is repeated to press / release the tube.

In the ink jet recording apparatus according to the present embodiment having the above-described operation, the moving member 55 rotates in the same direction as the suction rotation direction of the tube pump 5 when the tube pump 5 is not operating, and Since the tube 54 moves away from the tube 54 and the pressing of the tube 54 is released, the tube 54 can be prevented from being deformed.

That is, in the present embodiment, the disk member as the moving member 55 is rotated in the same direction as the suction operation direction, and the pressure roller, which moves the pressure roller away from the tube, releases the tube pressing state. can do.

Further, the ink jet recording apparatus of the present embodiment has an effect that the sensor which has been required in the past is not required, and the apparatus itself is prevented from being increased in size and cost. That is, in the present embodiment, with the above-described configuration and operation, the tube pressed state of the tube pump can be reliably released without increasing the size of the device.

Further, in the ink jet recording apparatus of this embodiment, the disk member as the moving member 55 is moved in the direction away from the tube 54 by rotating in the same direction as the suction rotation direction of the tube pump body. Since the pressing of the tube 54 is released, it is possible to eliminate the necessity of two independent rotation drive sources and the reverse rotation mechanism, and it is possible to use the clutch mechanism.

In this embodiment, the pump body 5 is used during the pressing release operation by using the clutch mechanism.
By cutting off the rotational communication between the pump body 1 and the drive source, the pump body 5
1 is selectively locked, and during the suction operation, the rotation of the disk member is selectively locked by cutting off the rotational communication between the disk member as the moving member 55 and the driving source. , And the pump body 51 and the disk member as the moving member 55 can be independently controlled by two rotary driving sources.

In the present embodiment, since the pressing operation and the releasing operation move in the same direction, the clutch mechanism can be used as described above, and the design range can be expanded. That is, there is an advantage that the control can be performed in a stable rotation range of the motor and the transport amount by the pump can be stably performed.

[0035]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) An ink jet recording apparatus according to a first embodiment includes a recording head 1 having a plurality of nozzle portions 11 for ejecting ink in accordance with image information as shown in FIGS. In an ink jet recording apparatus including a cap member 3 covering the nozzle portion 11 and a suction pump connected to the cap member 3 for sucking ink, the suction pump moves the tube 54 by pressing rollers 521 and 522. It is configured by a tube pump 5 that performs suction by deforming by pressing, and when not operating,
A moving member 55 that rotates in the same direction as the suction rotation direction of the tube pump 5 is provided.

FIG. 1 is a schematic view of a recovery device mounted on a tube pump according to the first embodiment. A tube pump 5 includes a cap 3 that covers a nozzle portion 11 of a recording head 1 via a flow path tube 4. And is configured to be able to suck ink from the nozzle unit 11.

The ink sucked by the tube pump 5 is discharged to a waste ink absorber 6 disposed in the apparatus. FIG. 1 is a schematic diagram in which a portion according to the first embodiment is extracted and described, and the recovery device originally has various mechanical portions.

FIGS. 2 and 3 show the structure of the tube pump according to the first embodiment. The pump housing 53 has a part of the inner wall surface formed in an arc shape. A tube 54 arranged along the wall surface, and pressure rollers 521 and 522 for pressing the tube 54 and a guide groove 5 capable of moving the pressure rollers 521 and 522 to a pressed position and a non-pressed position of the tube.
11 and 512, and a gear unit that receives driving from a driving source.

By the transmitted operation, the pressure roller 521,
In order to move the 522 to the non-pressing position of the tube 54, a moving member 55 composed of a gear engaged with the shafts of the pressure rollers 521 and 522, and the pressure rollers 521 and 522 are always in the guide grooves 511 and 512. And an elastic member 56 (561, 562) biasing toward the pressing position.

In the vicinity of the tube pump 5, an engaging member 7 for rotating the moving member 55 is arranged. In the first embodiment shown in FIG. 2, a rack-and-pinion relationship is established. ing. That is, the moving member 55 is configured to be driven by a drive system different from the drive system of the tube pump 5.

Next, the operation of releasing the tube pressure of the tube pump according to the first embodiment will be described with reference to FIGS.

At the time of the suction operation and immediately after the end of the suction operation, as shown in FIG. 4A, the pressure rollers 521, 52
2 is at the tube pressing position (radially outward position) of the guide grooves 511 and 512 and is in a state where the tube 54 is crushed.

After a lapse of a predetermined time from the end of the suction operation, the tube is operated by a drive system (not shown) different from the drive system for driving the tube pump as shown in FIG. When the engaging member 7 is operated, the moving member 55
Is operated in the clockwise release rotation direction Y which is the same as the suction operation direction X of the tube pump.

At this time, the pump body 51 is kept stopped without being related to the operation of the moving member. As a result, the pressure rollers 521 and 522 are
As shown in (4) of FIG. 4, it moves to the non-pressing position (radially inward position) along 2.

Thereafter, the engagement member 7 returns from the release operation end position (the position shown in FIG. 4 (4)) to the standby position (the position shown in FIG. 4 (1)). The return operation is performed while rotating the counterclockwise direction 55 in the counterclockwise direction opposite to the release rotation direction Y.
21 and 522, the shape of a portion to be engaged with the shaft portion is U-shaped as shown in the figure.
When the moving member 55 rotates in the direction opposite to the clockwise release rotation direction Y, the pressing rollers 521 and 522 are formed.
Can not be moved. (State shown in (5) of FIG. 4)

Thus, the operation of releasing the pressing state of the pressure rollers 521 and 522 against the tube 54 ends.

As shown in the timing chart of FIG. 6, the timing for releasing the pressing is performed before the capping state is turned off. As a result, the residual pressure in the flow path can be released, and problems such as ink withdrawal that can occur when the cap is turned off can be prevented.

That is, in the pressing release operation, after the cap 3 is turned on (shown in FIG. 6 (A)), the pump operation is started after a lapse of a fixed time (shown in FIG. 6 (B)), and the predetermined operation time is started. After the elapse, the pump operation is stopped (FIG. 6B).

After a short period of time elapses after the pump operation is stopped, the pressing release operation is started (shown in FIG. 6C), and after a short predetermined operating period, the pressing release operation is stopped (FIG. 6 (C)). C) shown).

At this time, the tube 54 is in a pressed state (illustrated in FIG. 6D) after a short period of time has elapsed after the pump operation is started. The pressed state (illustrated in FIG. 6D) is established.

In the pressure return operation, after the cap 3 is turned on (illustrated in FIG. 6A) and the pump operation is started after a lapse of a predetermined time (illustrated in FIG. 6B), the pump operation is started. After a short period of time, the tube 54 enters a pressed state (illustrated in FIG. 6D) and returns to the pressed state.

Next, based on FIG.
The movement operation from the non-pressed state position 22 to the pressed position where the suction action can be performed will be described.

The state shown in FIG. 5A is a state in which the pressing state of the pressure rollers 521 and 522 is released. Even in this state, the pressure rollers 521, 5
22 is urged toward the tube pressing position by the elastic members 561 and 562, but is set so as not to crush the tube 54 by the balance with the tube reaction force.

In the pressing position return operation, the pump body 5-a is rotated in the suction operation direction X from the above state (the suction operation is started as a system).

Thus, the guide grooves 511, 512
The pressure rollers 521 and 522 engaged with the tube 5 also start to move in the same direction, and the tube 5 as shown in FIG.
When the pressure rollers 521 and 522 are located at positions where they do not come into contact with 4, the relationship between the urging force of the elastic members 561 and 562 and the tube reaction force is lost, and the pressure rollers 521 and 522 are moved along the guide grooves 511 and 512. It moves to the pressing position, and becomes in a suctionable state. This operation is performed at least by the pump body 51.
Is completed by one rotation.

By performing the above operation, the tube is reliably pressed during the suction operation of the tube pump, and the tube is released during the non-operation, so that the non-operation tube is crushed by the pressure roller. It is possible to prevent troubles such as suction failure due to deformation of the tube caused by leaving the tube as it is.

In the ink jet recording apparatus according to the first embodiment having the above-described operation, the moving member 55 rotates in the same direction as the suction rotation direction of the tube pump 5 when the tube pump 5 is not operating. Since the tube 54 moves away from the tube 54 and releases the pressing of the tube 54, the deformation of the tube 54 is prevented, and the pressing state of the tube 54 when the tube pump 5 is not operating can be reliably released. This has the effect of preventing inconveniences such as poor pressure generated due to the tube 54 being left pressed.

Further, the ink jet recording apparatus of the first embodiment eliminates the need for a sensor which has been required in the prior art, so that it is possible to prevent the apparatus itself from being increased in size and cost and to simplify the control. .

Further, in the ink jet recording apparatus of the first embodiment, the pressing release operation is performed before the cap member 3 releases the covering state of the nozzle portion 11 so as to draw out ink when the covering state is released. This has the effect that defects can be prevented.

In the ink jet recording apparatus according to the first embodiment, the engaging member 7 for operating the disk member as the moving member 55 is driven by a driving source different from the driving source of the pump body 51. Since it is driven to rotate, an effect of realizing optimal drive control of the moving member 55 is achieved.

Further, in the ink jet recording apparatus according to the first embodiment, since the pressure rollers 521 and 522 are constantly urged to the tube pressing position by the elastic members 561 and 562, the pressing state of the tube 54 can be reduced. This has the effect of ensuring that the driving load for pressing the tube 54 is reduced.

(Second Embodiment) As shown in FIG. 7, in the ink jet recording apparatus of the second embodiment, the suction operation of the tube pump and the release operation of the moving member 58 are performed during the non-operation time. The difference is that the rotational motion of the embodiment is changed to the linear motion, and the following description will focus on the difference.

The suction operation member 57 of the tube pump 5
Move to the right in FIG. 7 which is the moving direction for the suction operation, and the tube 5 is moved by the vertical wall 571 constituting the pressurizing section.
4 is configured to realize a suction operation by squashing. That is, the tube 54 is sandwiched and crushed between a vertical wall 571 constituting the pressurizing portion and a vertical wall 581 of the moving member described later.

In the non-operation state in which the suction operation of the suction operation member 57 of the tube pump 5 is released, the moving member 58 moves rightward in FIG. 7, which is the same direction as the suction operation moving direction. Vertical wall 58 forming a pressurizing unit
The tube 54, which has been crushed by the rightward movement of the tube 1 and retreating, is released, thereby canceling the suction operation.

In the ink jet recording apparatus of the second embodiment having the above structure, the moving member 58 is moved linearly in the same direction as the suction operation direction of the suction operation member 57 of the tube pump when the tube pump is not operating. By doing so, the suction operation is released by moving the vertical wall 581 constituting the pressurizing portion to a non-pressing position where the tube is not pressed.

In the ink jet recording apparatus according to the second embodiment having the above-described operation, the moving member 58 is not operated when it is not operated.
Is moved linearly in the same direction as the suction operation direction of the suction operation member 57, so that the vertical wall 5 constituting the pressurizing section is moved.
By moving 81 to a non-pressing position where the tube is not pressed, the suction operation is released, so that deformation of the tube is prevented and the pressed state of the tube 54 when the tube pump is not operated is reliably released. Thus, there is an effect of preventing a problem such as a defective pressure generated by leaving the tube 54 pressed.

The ink jet recording apparatus according to the second embodiment eliminates the need for a sensor which has been required in the prior art, so that it is possible to prevent an increase in the size and cost of the apparatus and to simplify the control. .

Further, in the ink jet recording apparatus of the second embodiment, the suction operation of the tube pump and the moving member 58 are performed.
Since the release operation is a linear motion, an expensive bearing is not required only by using a guide and a rail.

The above-described embodiments have been described by way of example only, and the present invention is not limited to these embodiments. Those skilled in the art will recognize from the claims, the detailed description of the invention, and the drawings. Modifications and additions are possible without departing from the technical idea of the present invention.

In the first embodiment, an example in which the moving member 55 is driven by a drive system different from the drive system of the tube pump 5 has been described as an example, but the present invention is not limited thereto. But the tube pump 5 and the moving member 5 by one drive source
Five selective rotary drive embodiments can be employed.

[Brief description of the drawings]

FIG. 1 is an overall view showing the entirety of an inkjet recording apparatus according to an embodiment of the present invention and a first example.

FIG. 2 is a partially cutaway enlarged sectional view showing a tube pump and a moving member in the present embodiment and a first example.

FIG. 3 is a sectional view showing a tube pump and a moving member according to the present embodiment and a first example.

FIG. 4 is an explanatory diagram showing a state as viewed from portions A and B in FIG. 3 during a pressing release operation of the tube pump and the moving member in the present embodiment and the first example.

FIG. 5 is an explanatory diagram showing a state as viewed from a portion A and a portion B in FIG. 3 during a pressing position return operation of the tube pump and the moving member in the present embodiment and the first example.

FIG. 6 is a chart showing a time chart of each state of the cap, the pump operation, the press release operation, and the tube in the press release operation and the press position return operation in the present embodiment and the first example.

FIG. 7 is a sectional view showing a main part of an ink jet recording apparatus according to a second embodiment of the present invention.

FIG. 8 is a block diagram illustrating a control system of a second conventional inkjet recording apparatus.

FIG. 9 is an explanatory diagram showing a relationship between a rotation direction of a pump body and a position of a pressure roller in a guide in a released state and a pressed state of the third conventional inkjet recording apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Recording head 4 Tube 5 Tube pump 11 Nozzle part 50 Suction pump 54 Tube 55 Moving member 521, 522 Pressure roller

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Tatsuhiro Ishise 2274 Hongo, Ebina-shi, Kanagawa Prefecture Fuji Xerox Co., Ltd.Ebina Office (72) Inventor Koji Obata 2274 Hongo, Ebina-shi, Kanagawa Prefecture Fuji Xerox Co., Ltd. In-house F-term (reference) 2C056 EA27 JA13 JC08 JC13 JC20

Claims (3)

[Claims] 1. An ink jet recording apparatus comprising: a recording head having a plurality of nozzles for ejecting ink in accordance with image information; and a suction pump connected to the nozzles for sucking ink. A tube pump configured to perform suction by deforming the tube by pressing with a pressurizing unit, and moving the tube pump in the same direction as the suction operation direction of the tube pump when the tube pump is not in operation. An ink jet recording apparatus comprising a moving member for moving the tube to a non-pressing position where the tube is not pressed. 2. The suction pump according to claim 1, wherein the suction pump is configured by a tube pump that performs suction by pressing and deforming a tube with a pressure roller, and when the tube pump is not operated, the suction rotation of the tube pump is performed. An ink jet recording apparatus comprising a moving member that rotates in the same direction as the direction. 3. The ink jet recording apparatus according to claim 2, wherein the pressure roller is constantly urged to a tube pressing position by an elastic member.