JP2018103370A - Inkjet recording apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inkjet recording apparatus which is capable of effectively cleaning an ink discharge surface while suppressing damage to a wiper member.SOLUTION: An inkjet recording apparatus comprises a wiper member, first cleaning liquid supply ports 63 and a plurality of groove parts 65. The wiper member comes into contact with a wiping surface having an ink discharge area and moves to a wiping direction A1. The first cleaning liquid supply ports 63 are formed at a more upstream side in the wiping direction A1 than the ink discharge area and a more downstream side in the wiping direction A1 than a movement start position of the wiper member. The first cleaning liquid supply ports 63 are arranged in a line with intervals in a head width direction B which crosses the wiping direction A1. The plurality of groove parts 65 have portions that extend in parallel to each other and are slanted from the wiping direction A1 at a more downward side in the wiping direction A1 than the line of plurality of first cleaning liquid supply ports 63.SELECTED DRAWING: Figure 12

Description

  The present invention relates to an ink jet recording apparatus that ejects ink from a recording head onto a recording medium to record an image on the recording medium, and more particularly to an ink jet recording apparatus that can clean the ink ejection surface of the recording head.

  In general, an ink jet recording apparatus that records an image on a recording medium by ejecting ink from a nozzle of a recording head onto a recording medium such as paper is known. In this ink jet recording apparatus, when ink droplets are ejected from the nozzles, ink scattered around the nozzles or ink overflowing from the nozzles may adhere to the ink ejection surface. In this case, the ink adhering to the periphery of the nozzles may cause the ink ejection direction to deviate from the target direction, or the ink ejection amount may differ from the target amount, resulting in image recording failure.

  On the other hand, an ink jet recording apparatus is known in which an ink discharge surface of a recording head is wiped by a wiper member in order to clean ink adhering to the periphery of the nozzle. There is also known an ink jet recording apparatus in which a plurality of cleaning liquid supply ports are provided on the ink discharge surface, and wiping is performed by supplying the cleaning liquid from the plurality of cleaning liquid supply ports to the ink discharge surface (see, for example, Patent Document 1).

JP 2007-83396 A

  By the way, the plurality of cleaning liquid supply ports are arranged side by side in a direction substantially orthogonal to the wiping direction of the wiper member. Therefore, the cleaning liquid is supplied discretely to the wiper member, and the cleaning liquid partially exists in the wiper member. As a result, when the wiping is performed, the area where the cleaning liquid does not exist in the wiper member comes into contact with the ink discharge surface, so that the cleaning effect in the area where no cleaning liquid exists is reduced. On the other hand, it is also conceivable to perform a plurality of wiping operations in order to spread the cleaning liquid over the entire contact portion of the wiper member with the ink ejection surface. However, the area where the cleaning liquid does not exist in the wiper member is in a so-called empty wiping state until the cleaning liquid is spread over the entire contact portion. Therefore, performing the wiping operation a plurality of times causes damage to the wiper member. become.

  An object of the present invention is to provide an ink jet recording apparatus that can effectively clean an ink discharge surface while suppressing damage to a wiper member.

  An ink jet recording apparatus according to one aspect of the present invention includes an ink discharge nozzle, a wiper member, a first cleaning liquid supply port, and a plurality of grooves. The ink discharge nozzle is a portion from which ink is discharged. The wiper member moves in a predetermined first direction in contact with a wiping surface having an ink discharge region provided with the ink discharge nozzle. The first cleaning liquid supply port is formed on the upstream side in the first direction with respect to the ink ejection region on the wiping surface and on the downstream side in the first direction with respect to a predetermined movement start position of the wiper member. Yes. The first cleaning liquid supply ports are arranged side by side in a row separated in a second direction intersecting the first direction. The plurality of groove portions have portions extending in parallel with each other at an angle with respect to the first direction on the downstream side in the first direction with respect to the row of the plurality of first cleaning liquid supply ports.

  ADVANTAGE OF THE INVENTION According to this invention, the inkjet recording device which can wash | clean an ink discharge surface effectively can be provided, suppressing the damage to a wiper member.

FIG. 1 is a diagram showing the structure of an ink jet recording apparatus provided with a recording head according to an embodiment of the present invention. FIG. 2 is a view of the first transport unit and the recording unit of the ink jet recording apparatus shown in FIG. 1 as viewed from above. FIG. 3 is a diagram of a recording head constituting the line head of the recording unit. FIG. 4 is a view of the recording head as viewed from the ink ejection surface side. FIG. 5 is a view of the recording head and its peripheral portion as viewed obliquely from below. FIG. 6 is a view of the cleaning liquid supply member of the recording head as viewed obliquely from below. FIG. 7 is a view of the cleaning liquid supply member as viewed from the cleaning liquid supply surface. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. FIG. 9 is a view of the recording head and its peripheral portion as viewed obliquely from above. FIG. 10 is a diagram illustrating a state in which the maintenance unit is disposed below the recording unit. FIG. 11 is a diagram illustrating a state in which the wiper member is disposed below the recording head. FIG. 12 is a view of the state in which the cleaning liquid is supplied from the cleaning liquid supply port as viewed obliquely from below. FIG. 13 is a view showing a state in which the wiper member is lifted from the state of FIG. 11 and is brought into pressure contact with the cleaning liquid supply member. FIG. 14 is a diagram illustrating a state where the wiper member is moved from the state of FIG. 13. FIG. 15 is a view of the cleaning liquid supply member in the state of FIG. 14 as viewed from below. FIG. 16 is a diagram showing a state where the wiper member is further moved from the state of FIG. FIG. 17 is a diagram illustrating a state in which the wiper member is further lowered after the wiper member is further moved from the state of FIG. 16. FIG. 18 is a view of the cleaning liquid supply member as seen from below, showing a first modification of the cleaning liquid supply member. FIG. 19 is a view of a cleaning liquid supply member showing a second modification of the cleaning liquid supply member as viewed from below. FIG. 20 is a view of the cleaning liquid supply member as viewed from below, showing a third modification of the cleaning liquid supply member.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, embodiment described below is only an example which actualized this invention, and does not limit the technical scope of this invention.

  As shown in FIG. 1, a paper feed tray 2 that accommodates a sheet S (recording medium) is provided on the left side of an inkjet recording apparatus 100 according to an embodiment of the present invention. A paper feed roller 3 and a driven roller 4 are provided at one end of the paper feed tray 2. The paper feed roller 3 transports and feeds the paper S stored in the paper feed tray 2 one by one from the uppermost paper S to a first transport unit 5 described later. The driven roller 4 rotates following the rotation of the paper feed roller 3.

  A first transport unit 5 and a recording unit 9 are disposed on the downstream side (the right side in FIG. 1) in the paper transport direction X with respect to the paper feed roller 3 and the driven roller 4. The first transport unit 5 includes a first drive roller 6, a first driven roller 7, and a first transport belt 8 that is stretched over the first drive roller 6 and the first driven roller 7. The first conveying unit 5 is a sheet held on the first conveying belt 8 by the first driving roller 6 being rotated in the clockwise direction in FIG. 1 by a control signal from the control unit 110 of the inkjet recording apparatus 100. S is transported along the paper transport direction X.

  The recording unit 9 includes a head housing 10 and line heads 11C, 11M, 11Y, and 11K held by the head housing 10. These line heads 11 </ b> C to 11 </ b> K are supported at a height that is separated from the conveyance surface of the first conveyance belt 8 by a predetermined distance (for example, 1 mm). As shown in FIG. 2, the line heads 11 </ b> C to 11 </ b> K each have a plurality (three in this case) of recording heads 17 a to 17 c. Each of the recording heads 17 a to 17 c has a head portion 18. In each of the line heads 11 </ b> C to 11 </ b> K, the head portions 18 are arranged in a staggered manner along the paper width direction A (vertical direction in FIG. 2) orthogonal to the paper transport direction X.

  As shown in FIGS. 3 and 4, the head unit 18 has an ink ejection surface F1 including an ink ejection region R1 in which a plurality of ink ejection nozzles 18a (see FIG. 2) are arranged. The ink discharge nozzle 18a has a lower opening. The lower opening is an ink ejection port that ejects ink onto the paper S. The ink ejection surface F1 constitutes the wiping surface of the present invention. Since the recording heads 17a to 17c have the same shape and configuration, the recording heads 17a to 17c are shown in one drawing in FIGS.

  In the recording heads 17a to 17c of the line heads 11C to 11K, inks of four colors (cyan, magenta, yellow, and black) stored in ink tanks (not shown) are respectively provided for the colors of the line heads 11C to 11K. Supplied.

  Each of the recording heads 17a to 17c is transported while being sucked and held on the transport surface of the first transport belt 8 in accordance with image data received from an external computer by a control signal from the control unit 110 (see FIG. 1). Ink is ejected from the ink ejection nozzle 18a. As a result, a color image is formed on the paper S on the first conveying belt 8 by superimposing the four ink colors cyan, magenta, yellow and black.

  The recording heads 17a to 17c are provided with a cleaning liquid supply member 60 for supplying the cleaning liquid 23 (see FIG. 12). The cleaning liquid supply member 60 is disposed adjacent to the upstream side (right side in FIG. 3) of the wiping direction A1 (an example of the first direction of the present invention) of the wiper member 35 described later with respect to the head unit 18. Here, the wiping direction A1 is a direction in which the wiper member 35 moves in contact with the ink ejection surface F1 when the ink ejection surface F1 is cleaned (see FIGS. 13, 14, and 16). The cleaning liquid supply member 60 has a cleaning liquid supply surface F2 including a cleaning liquid supply region R2 in which a plurality of cleaning liquid supply ports 63 and 64 (see FIGS. 6 to 8) for supplying the cleaning liquid are arranged. The cleaning liquid supply surface F2 has a plurality of grooves 65 for holding the cleaning liquid. Note that at least the cleaning liquid supply surface F2 of the cleaning liquid supply member 60 is formed of resin or SUS (stainless steel). At least the ink discharge surface F1 of the head unit 18 is formed of, for example, SUS (stainless steel). The cleaning liquid supply surface F2 constitutes the wiping surface of the present invention together with the ink discharge surface F1. The wiping surface is a surface with which the wiper member 35 contacts when the wiper member 35 is moved when the ink discharge surface F1 is cleaned.

  As shown in FIGS. 6 to 8, the plurality of cleaning liquid supply ports 63 and 64 have a plurality of first cleaning liquid supply ports 63 and a plurality of second cleaning liquid supply ports 64.

  The plurality of first cleaning liquid supply ports 63 are located upstream of the ink discharge region R1 (see FIGS. 3 to 5) in the wiping direction A1 and a predetermined movement start position MS of the wiper member 35 (position shown in FIG. 13). Is formed in the cleaning liquid supply region R2 downstream of the wiping direction A1. The plurality of first cleaning liquid supply ports 63 are arranged side by side in a row separated in the head width direction B (an example of the second direction of the present invention) orthogonal to the wiping direction A1.

  The plurality of second cleaning liquid supply ports 64 are formed downstream of the row of the plurality of first cleaning liquid supply ports 63 in the wiping direction A1 in the cleaning liquid supply region R2. The plurality of second cleaning liquid supply ports 64 are arranged side by side in a row separated in the head width direction B, and form a row parallel to the row of the plurality of first cleaning liquid supply ports 63. The first cleaning liquid supply port 63 and the second cleaning liquid supply port 64 are arranged in a staggered manner along the head width direction B.

  The first cleaning liquid supply port 63 and the second cleaning liquid supply port 64 are open on the cleaning liquid supply surface F2, and communicate with the storage space 66 that stores the cleaning liquid. Therefore, the cleaning liquid 23 in the storage space 66 is supplied to the cleaning liquid supply region R2 via the first cleaning liquid supply port 63 and the second cleaning liquid supply port 64 (see FIG. 12). The cleaning liquid 23 (see FIG. 12) supplied from the first cleaning liquid supply port 63 and the second cleaning liquid supply port 64 to the cleaning liquid supply region R2 is held in the groove 65 (see FIG. 15), and the ink discharge surface F1 is cleaned. Used for The inner diameters of the first cleaning liquid supply port 63 and the second cleaning liquid supply port 64 are, for example, 10 μm or more and 100 μm or less.

  The plurality of groove portions 65 hold the cleaning liquid 23 supplied from the first cleaning liquid supply port 63 and the second cleaning liquid supply port 64 and bring the cleaning liquid 23 into contact with the wiper member 35 before being brought into contact with the ink discharge surface F1. The plurality of groove portions 65 are formed in a linear shape inclined with respect to the wiping direction A1. The plurality of groove portions 65 are separated in the head width direction B and extend in parallel to each other. Each groove 65 has a region between adjacent first cleaning liquid supply ports 63, a region between a plurality of first cleaning liquid supply ports 63 and a plurality of second cleaning liquid supply ports 64, and a second adjacent. The region between the cleaning liquid supply ports 64 is traversed. Here, FIG. 8 shows a groove 65 having a semicircular cross-sectional shape. However, the cross-sectional shape of the groove 65 may be a shape other than a semicircular shape such as a rectangle or a triangle.

  As shown in FIGS. 3 and 5, an inclined surface 62 is formed on the upstream side (right side in FIG. 3) of the wiping direction A <b> 1 with respect to the cleaning liquid supply surface F <b> 2 of the cleaning liquid supply member 60. A portion of the cleaning liquid supply surface F2 on the downstream side (left side in FIG. 3) in the wiping direction A1 is formed in a thin plate shape, and is disposed so as to overlap the end portion of the ink discharge surface F1 of the head portion 18. Note that in FIG. 5 and FIG. 9 described later, only a part of the recording heads 17a to 17c is illustrated for easy understanding.

  As shown in FIGS. 5 and 9, the cleaning liquid supply member 60 is connected to a tube 70 through which the cleaning liquid passes. The tube 70 is connected to a cleaning liquid supply mechanism (not shown). The cleaning liquid supply mechanism includes, for example, a tank (not shown) that stores the cleaning liquid, and a pump (not shown) that pumps the cleaning liquid from the tank to the tube 70.

  The tube 70 has a plurality of branch portions. In the present embodiment, the tube 70 has twelve branch portions, and each branch portion is connected to the cleaning liquid supply member 60 of the recording heads 17a to 17c. In FIGS. 5 and 9, only some of the recording heads 17a to 17c are illustrated for easy understanding.

  In the ink jet recording apparatus 100, in order to clean the ink ejection surfaces F1 of the recording heads 17a to 17c, the cleaning liquid is supplied to all the recording heads 17a to 17c at the start of printing after a long stop and between printing operations. The cleaning liquid 23 (see FIG. 12) is supplied from the ports 63 and 64 (see FIG. 6), and the ink discharge surface F1 is wiped off by a wiper member 35 described later to prepare for the next printing operation.

  Returning to FIG. 1, the second transport unit 12 is arranged on the downstream side (right side in FIG. 1) in the paper transport direction X with respect to the first transport unit 5. The second transport unit 12 includes a second drive roller 13, a second driven roller 14, and a second transport belt 15 stretched over the second drive roller 13 and the second driven roller 14. In the second transport unit 12, the paper S held on the second transport belt 15 is transported along the paper transport direction X when the second drive roller 13 is rotationally driven in the clockwise direction of FIG. 1.

  The sheet S on which the image by the ink is recorded by the recording unit 9 is sent to the second transport unit 12. The ink on the surface of the paper S is dried while passing through the second transport unit 12. A maintenance unit 19 and a cap unit 90 are disposed below the second transport unit 12. The maintenance unit 19 moves below the recording unit 9 when performing the wiping operation by the wiper member 35 described above. Further, the maintenance unit 19 wipes the cleaning liquid 23 (see FIG. 12) supplied from the cleaning liquid supply ports 63 and 64 of the recording heads 17a to 17c while applying the cleaning liquid 23 to the ink discharge surface F1, and collects the wiped cleaning liquid. The cap unit 90 moves horizontally below the recording unit 9 when capping the ink ejection surfaces F1 (see FIG. 3) of the recording heads 17a to 17c. Furthermore, the cap unit 90 covers the lower surfaces of the recording heads 17a to 17c by moving upward from below the recording unit 9.

  A discharge roller pair 16 is provided on the downstream side in the paper transport direction X with respect to the second transport unit 12 to discharge the paper S on which an image is recorded to the outside of the apparatus. A discharge tray (not shown) on which the sheets S discharged outside the apparatus are stacked is provided on the downstream side of the discharge roller pair 16.

  The maintenance unit 19 includes a plurality of wiper members 35 (see FIG. 11) movable along the ink ejection surface F1, a substantially rectangular carriage (not shown) to which the plurality of wiper members 35 are fixed, and supports the carriage. Supporting frame (not shown). The carriage is supported to be slidable in the paper width direction A (see FIG. 2) with respect to the support frame.

  The wiper member 35 is an elastic member (for example, made of rubber made of EPDM) for wiping the cleaning liquid supplied from the cleaning liquid supply ports 63 and 64 (see FIG. 6) of the recording heads 17a to 17c on the ink discharge surface F1. Member). The wiper member 35 is in pressure contact with the inclined surface 62 on the upstream side in the wiping direction A1 with respect to the cleaning liquid supply region R2 (see FIG. 4) of the cleaning liquid supply member 60, and the cleaning liquid supply surface F2 and the ink discharge surface F1 are moved by the movement of the carriage. It moves in close contact with the wiping surface along (wiping surface). Thereby, the wiping surface is wiped by the wiper member 35.

  Next, the recovery operation of the recording heads 17a to 17c using the maintenance unit 19 in the inkjet recording apparatus 100 of the present embodiment will be described. The recovery operation of the recording heads 17a to 17c described below is executed by controlling the operations of the recording heads 17a to 17c, the maintenance unit 19 and the like based on a control signal from the control unit 110 (see FIG. 1). The

  When performing the recovery operation of the recording heads 17a to 17c, first, as shown in FIG. 10, the control unit 110 (see FIG. 1) lowers the first transport unit 5 positioned below the recording unit 9. Then, the control unit 110 horizontally moves the maintenance unit 19 disposed below the second transport unit 12 so as to be disposed between the recording unit 9 and the first transport unit 5. In this state, the wiper member 35 of the maintenance unit 19 is disposed below the ink discharge surface F1 and the cleaning liquid supply surface F2 of the recording heads 17a to 17c (see FIG. 11).

(Cleaning liquid supply operation)
As shown in FIGS. 11 and 12, the cleaning liquid 23 is supplied to the cleaning liquid supply member 60 of the recording heads 17a to 17c by the control unit 110 prior to the wiping operation described later. The supplied cleaning liquid 23 is supplied from the first cleaning liquid supply port 63 and the second cleaning liquid supply port 64 by a predetermined amount to the cleaning liquid supply region R2.

(Purge operation)
Further, as shown in FIG. 11, prior to a wiping operation described later, the control unit 110 supplies ink 22 to the recording heads 17a to 17c. The supplied ink 22 is forcibly purged from the ink discharge nozzle 18a. By this purging operation, thickened ink, foreign matter and bubbles in the ink discharge nozzle 18a are discharged from the ink discharge nozzle 18a. At this time, the purge ink 22 is pushed out to the ink discharge surface F1 along the shape of the ink discharge region R1 where the ink discharge nozzle 18a exists.

(Wiping operation)
As shown in FIG. 13, the control unit 110 raises the wiper member 35 to bring it into contact with the inclined surface 62 of the cleaning liquid supply member 60 of the recording heads 17 a to 17 c with a predetermined pressure. The position before the wiper member 35 contacts the inclined surface 62 and the wiper member 35 moves in the wiping direction A1 is an example of the movement start position of the present invention.

  As shown in FIG. 14, the controller 110 moves the wiper member 35 toward the ink discharge region R1 along the cleaning liquid supply surface F2 from the state where the tip of the wiper member 35 is in pressure contact with the inclined surface 62 of the cleaning liquid supply member 60. It moves along the wiping direction A1.

  By the way, when the plurality of cleaning liquid supply ports are arranged in a direction substantially orthogonal to the wiping direction of the wiper member, the cleaning liquid is discretely supplied to the wiper member. Therefore, the cleaning liquid partially exists in the wiper member, and when the wiping is performed, a region where the cleaning liquid does not exist in the wiper member comes into contact with the ink ejection surface. As a result, the cleaning effect in a region where no cleaning liquid is present is reduced. On the other hand, it is also conceivable to perform a plurality of wiping operations in order to spread the cleaning liquid over the entire contact portion of the wiper member with the ink ejection surface. However, the area where the cleaning liquid does not exist in the wiper member is in a so-called empty wiping state until the cleaning liquid is spread over the entire contact portion. Therefore, performing the wiping operation a plurality of times causes damage to the wiper member. become.

  In contrast, in the ink jet recording apparatus 100 of the present embodiment, the wiper member 35 is brought into contact with the cleaning liquid supply surface F2 and the ink discharge surface F1 (wiping surface) during the cleaning of the ink discharge surface F1, and moves along the wiping direction A1. In this case, the cleaning liquid 23 supplied from the first cleaning liquid supply port 63 is moved in the wiping direction A1 by the wiper member 35. At this time, as shown in FIG. 15, the plurality of groove portions 65 cross a predetermined region of the cleaning liquid supply region R2 and are inclined with respect to the wiping direction A1, so that the cleaning liquid 23 moved by the wiper member 35 is grooved 65. Retained. Similarly, the cleaning liquid 23 supplied from the second cleaning liquid supply port 64 is held in the groove 65 by the cleaning liquid 23 supplied from the second cleaning liquid supply port 64 being moved in the wiping direction A1 by the wiper member 35. Further, the wiper member 35 passes through the groove 65 in which the cleaning liquid 23 is held. Therefore, the wiper member 35 can come into contact with the cleaning liquid 23 held in the groove portion 65, and the entire contact portion of the wiper member 35 with the ink ejection surface F <b> 1 can be wetted with the cleaning liquid 23. Thus, when the wiper member 35 is moved in contact with the ink discharge surface F1, it is possible to avoid a so-called empty wipe state, so that the cleaning effect on the ink discharge surface F1 can be enhanced and the wiper member 35 Damage can be suppressed.

  As shown in FIG. 16, the wiper member 35 moves on the ink ejection surface F1 along the wiping direction A1 while maintaining the state where the cleaning liquid 23 is held. At this time, the cleaning liquid 23 and the purge ink 22 (see FIG. 11) dissolve the ink droplets (waste ink) that adhere to the ink ejection surface F1 and solidify, and are wiped off by the wiper member 35. The wiper member 35 further moves along the wiping direction A1 and stops moving in the wiping direction A1 when it reaches a position opposite to the cleaning liquid supply region R2 with respect to the ink discharge region R1. The cleaning liquid 23, waste ink, and purge ink 22 wiped off by the wiper member 35 are collected in a cleaning liquid collection tray (not shown) provided in the maintenance unit 19.

(Separation operation)
After execution of the wiping operation, as shown in FIG. 17, the control unit 110 lowers the wiper member 35 and separates it from the ink ejection surface F1.

  Finally, the control unit 110 horizontally moves the maintenance unit 19 arranged between the recording unit 9 and the first conveyance unit 5 and arranges the maintenance unit 19 below the second conveyance unit 12 to place the first conveyance unit 5 in a predetermined manner. Raise to the position. In this way, the recovery operation of the recording heads 17a to 17c is completed.

  In the present embodiment, a plurality of cleaning liquid supply ports 63 and 64 for supplying the cleaning liquid 23 are provided on the upstream side in the wiping direction A1 with respect to the ink discharge region R1. Thus, after supplying the cleaning liquid 23 from the cleaning liquid supply ports 63 and 64, the wiper member 35 is moved along the ink discharge surface F1 from the upstream side in the wiping direction A1 with respect to the cleaning liquid supply ports 63 and 64. The ink discharge surface F <b> 1 can be wiped while holding the cleaning liquid 23 at 35. For this reason, the ink discharge surface F1 can be cleaned.

  The wiping operation may be performed a plurality of times for one purge operation. Further, the number of wiping operations for one purge operation may be determined according to the environmental temperature, the environmental humidity, the main power off time of the inkjet recording apparatus 100, and the like. For example, in an environment where the ink drying speed is high and the ink viscosity tends to be high, such as high temperature and low humidity, or when the main power off time is long, the wiping operation is performed twice for one purge operation or It is possible to do this three times. Further, when the main power is turned on, it is preferable to execute the purge operation and the wiping operation after a predetermined time elapses from the main power on to the start of printing.

  In the above-described embodiment, the example in which the cleaning liquid supply operation is performed before the wiping operation has been described. However, if the cleaning liquid supply operation is before the wiper member 35 enters the cleaning liquid supply region R2, the wiping operation is performed simultaneously. May be executed. In this embodiment, an example in which the purge operation is executed before the wiping operation is shown. However, the purge operation is executed simultaneously with the wiping operation before the wiper member 35 enters the ink discharge region R1. Also good.

  In the above embodiment, the recovery operation of the recording heads 17a to 17c is performed using the cleaning liquid 23 and the purge ink 22. However, the recovery operation of the recording heads 17a to 17c may be performed using only the cleaning liquid 23. Good. That is, the purge operation may not be performed.

  Further, in the above-described embodiment, an example in which the cleaning liquid supply member 60 having the cleaning liquid supply region R2 and the groove portion 65 is provided separately from the head portion 18 has been described. However, the present invention is not limited to this, and the cleaning liquid supply member 60 may not be provided, and the cleaning liquid supply ports 63 and 64 and the groove 65 may be provided in the head portion 18.

  In the above-described embodiment, an example in which the plurality of groove portions 65 are linearly formed has been described, but the present invention is not limited to this. For example, like the cleaning liquid supply member 60 of the first modification of the present invention shown in FIG. 18, a plurality of groove portions 65 may be formed in a curved shape.

  In the above-described embodiment, the example in which the plurality of groove portions 65 are linearly formed and inclined in the same direction has been described, but the present invention is not limited thereto. For example, as in the cleaning liquid supply member 60 of the second modified example of the present invention shown in FIG. 19, the plurality of groove portions 65 include a first groove portion 651 and a second groove portion 652 that are inclined in directions opposite to each other with respect to the wiping direction A1. You may go out. Similarly, when the plurality of groove portions 65 are formed in a curved shape, the curved first groove portion 651 and the second groove portion 652 as in the cleaning liquid supply member 60 of the third modified example of the present invention shown in FIG. 20, for example. May be inclined in directions opposite to each other with respect to the wiping direction A1.

  In the above-described embodiment, an example in which the first cleaning liquid supply port 63 and the second cleaning liquid supply port 64 are arranged side by side on a straight line perpendicular to the wiping direction A1 has been described. One or both of the two cleaning liquid supply ports 64 may be arranged side by side in a cross direction that is not orthogonal to the wiping direction A1, or may be arranged on a curve. Further, the second cleaning liquid supply port 64 may be omitted.

  Further, a configuration obtained by appropriately combining the configurations of the above-described embodiment and modification examples is also included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 100 Inkjet recording device 17a-17c Recording head 18a Ink discharge nozzle 23 Cleaning liquid 35 Wiper member 63 1st cleaning liquid supply port 64 2nd cleaning liquid supply port 65 Groove part 651 1st groove part 652 2nd groove part F1 Ink discharge surface R1 Ink discharge area F2 Cleaning liquid Supply surface R2 Cleaning liquid supply area

Claims (7)

An ink discharge nozzle from which ink is discharged;
A wiper member that moves in a predetermined first direction in contact with a wiping surface having an ink discharge region provided with the ink discharge nozzle;
A second direction that intersects the first direction on the wiping surface upstream of the ink ejection region in the first direction and downstream of the predetermined movement start position of the wiper member. A plurality of first cleaning liquid supply ports arranged in a row separated from each other;
An ink jet recording apparatus comprising: a plurality of grooves having portions extending in parallel to each other at an inclination with respect to the first direction on the downstream side in the first direction with respect to the row of the plurality of first cleaning liquid supply ports.   2. The inkjet recording apparatus according to claim 1, wherein the plurality of groove parts include a first groove part and a second groove part inclined in a direction opposite to the first groove part with respect to the first direction.   3. The inkjet recording apparatus according to claim 1, wherein the plurality of groove portions have portions extending between adjacent first cleaning liquid supply ports among the plurality of first cleaning liquid supply ports.   The plurality of first cleaning liquid supply ports are arranged side by side in a row spaced apart in the second direction on the downstream side in the first direction, and are arranged in parallel to the plurality of first cleaning liquid supply ports. The inkjet recording apparatus according to claim 1, further comprising a plurality of second cleaning liquid supply ports formed.   The inkjet recording apparatus according to claim 4, wherein the plurality of first cleaning liquid supply ports and the plurality of second cleaning liquid supply ports are arranged in a staggered manner along the second direction.   6. The inkjet recording apparatus according to claim 4, wherein the plurality of grooves have a portion extending between adjacent second cleaning liquid supply ports among the plurality of second cleaning liquid supply ports.   7. The inkjet recording apparatus according to claim 4, wherein the plurality of groove portions have a portion extending on the downstream side in the first direction from the row of the plurality of second cleaning liquid supply ports.

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