JP6295882B2 - Inkjet recording device - Google Patents

Description

  The present invention relates to an ink jet recording apparatus.

  The ink jet recording apparatus described in Patent Document 1 includes a recording head and a wiper. The recording head has an ink ejection surface. The ink ejection surface includes a first area where a nozzle for ejecting ink to the recording medium opens, a second area adjacent to one end of the first area, and a third area adjacent to the other end of the first area. . The wiper wipes ink adhering to the ink ejection surface by moving from the third region to the second region via the first region. The wiper is separated from the second region. Hereinafter, in this specification, wiping the ink adhering to the ink ejection surface may be referred to as wiping.

  In the next wiping, the wiper again contacts the second region and moves from the second region to the third region via the first region, thereby wiping off ink adhering to the ink ejection surface.

JP 2013-49205 A

  However, due to the contact of the wiper with the second region, the highly viscous ink adhering to the tip of the wiper adheres and remains in the second region. Therefore, ink is gradually accumulated in the second area as the wiping start area by repeating the wiping. There is a possibility that the recording medium is contaminated by the deposited ink.

  SUMMARY An advantage of some aspects of the invention is that it provides an ink jet recording apparatus capable of suppressing ink remaining in a wiping start area.

  According to the present invention, the ink jet recording apparatus includes a recording head, a wiper, a moving mechanism, and a control unit. The recording head has an ink ejection surface. The ink ejection surface includes a first region and a second region. In the first region, a nozzle for ejecting ink is opened. The second region is adjacent to one end of the first region. The moving mechanism moves the wiper while being in contact with the ink ejection surface. The control unit causes the moving mechanism to move the wiper so that the wiper stops at a position where the wiper comes into contact with the ink attached to the second region.

  According to the present invention, it is possible to suppress ink remaining in the second area as the wiping start area.

1 is a diagram illustrating a configuration of an ink jet recording apparatus according to an embodiment of the present invention. It is a figure which shows the head part of the inkjet recording device which concerns on embodiment of this invention. FIG. 2 is a diagram illustrating a recording head and a wiper unit of the ink jet recording apparatus according to the embodiment of the invention. (A)-(d) It is a figure which shows the wiping of the nth time of the inkjet recording device which concerns on embodiment of this invention. (A)-(e) It is a figure which shows the (n + 1) th wiping of the inkjet recording device which concerns on embodiment of this invention. (A)-(e) It is a figure which shows the (n + 2) wiping of the inkjet recording device which concerns on embodiment of this invention. 1 is a front view showing a recording head of an ink jet recording apparatus according to an embodiment of the present invention. 1 is a side view showing a recording head of an ink jet recording apparatus according to an embodiment of the present invention. It is a figure which shows the state which lowered | hung the wiper part of the inkjet recording device which concerns on embodiment of this invention. It is a figure which shows the state which raised the wiper part of the inkjet recording device which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof is not repeated. In the present embodiment, the X axis and the Y axis are parallel to the horizontal plane, and the Z axis is parallel to the vertical line.

  With reference to FIGS. 1 and 2, an ink jet recording apparatus 1 according to the present embodiment will be described. FIG. 1 shows the configuration of the inkjet recording apparatus 1. The ink jet recording apparatus 1 includes a head unit 3, a control unit 50, a wiper unit 60, a tray 200, a feed roller 201, a first transport unit 205, a second transport unit 212, a discharge roller 216, and a cap unit 290.

  The tray 200 is provided upstream of the first transport unit 205 in the transport direction P of the recording medium T and accommodates the recording medium T. A feeding roller 201 is provided at the downstream end of the tray 200 in the transport direction P. The feeding roller 201 conveys the recording medium T accommodated in the tray 200 to the first conveyance unit 205 one by one. The recording medium T is, for example, paper such as plain paper, copy paper, recycled paper, thin paper, thick paper, or glossy paper, or a sheet made of synthetic resin such as an OHP (Overhead Projector) sheet.

  The first transport unit 205 includes a first drive roller 206, a first driven roller 207, and a first transport belt 208 that is stretched over the first drive roller 206 and the first driven roller 207. As the first drive roller 206 rotates counterclockwise, the first transport belt 208 rotates, and the recording medium T held on the first transport belt 208 is transported in the transport direction P.

  The head unit 3 is disposed to face the first transport unit 205. The head unit 3 includes a head housing 18 and line heads 10K, 10C, 10M, and 10Y held by the head housing 18. FIG. 2 shows the head unit 3. The line heads 10K, 10C, 10M, and 10Y respectively discharge or discharge black ink, cyan ink, magenta ink, and yellow ink. The line heads 10K to 10Y are arranged along the conveyance direction P of the recording medium. Each of the line heads 10 </ b> K to 10 </ b> Y includes three recording heads 10 arranged in a staggered manner along a direction orthogonal to the transport direction P.

  As shown in FIG. 1, the second transport unit 212 is disposed downstream of the first transport unit 205 in the transport direction P. The second transport unit 212 includes a second drive roller 213, a second driven roller 214, and a second transport belt 215 stretched over the second drive roller 213 and the second driven roller 214. By rotating the second drive roller 213 counterclockwise, the second transport belt 215 rotates, and the recording medium T held by the second transport belt 215 is transported in the transport direction P.

  The recording medium T on which an image is recorded by the head unit 3 is sent to the second transport unit 212, and the ink ejected on the surface of the recording medium T is dried while passing through the second transport unit 212. A wiper unit 60 and a cap unit 290 are located below the second transport unit 212.

  The control unit 50 lowers the first transport unit 205 when the wiper unit 60 wipes the ink adhering to the ink ejection surfaces of the line heads 10K to 10Y, that is, when wiping is performed. Then, the control unit 50 horizontally moves the wiper unit 60 positioned below the second transport unit 212 to be positioned below the head unit 3. As a result, the wiper unit 60 is located between the head unit 3 and the first transport unit 205. The wiper unit 60 wipes off ink adhering to the line heads 10K to 10Y and collects the wiped ink.

  When capping the ink ejection surfaces of the line heads 10 </ b> K to 10 </ b> Y, the control unit 50 horizontally moves the cap unit 290 to be positioned below the head unit 3. Further, the control unit 50 moves the cap unit 290 upward. As a result, the cap unit 290 is attached to the ink ejection surfaces of the line heads 10K to 10Y.

  The discharge roller pair 216 is disposed downstream of the second transport unit 212 in the transport direction P, and discharges the recording medium T on which an image has been recorded to the outside of the inkjet recording apparatus 1.

  The recording head 10 and the wiper unit 60 will be described with reference to FIG. FIG. 3 shows the recording head 10 and the wiper unit 60. The wiper unit 60 includes the wiper 20 and the moving mechanism 30.

  The recording head 10 has an ink ejection surface 17. The ink ejection surface 17 includes a first area A1, a second area A2, and a third area A3. The second area A2 is adjacent to one end of the first area A1. The third area A3 is adjacent to the other end of the first area A1. A large number of nozzles 11 that eject ink are opened in the first region A1.

  The nozzle 11 ejects ink for forming an image on the recording medium T in the image forming process. The nozzle 11 discharges the ink Nf together with the unnecessary matter in the recording head 10 in the purge process. The ink Nf is stored in a sealed space. Therefore, evaporation of the volatile component contained in the ink Nf is suppressed. Volatile components evaporate when exposed to outside air. As a result, the ink Nf discharged from the nozzle 11 has a lower viscosity than the residual ink that has been in contact with the air.

  The control unit 50 causes the moving mechanism 30 to move the wiper 20. The moving mechanism 30 is controlled by the control unit 50 to move the wiper 20. Specifically, the moving mechanism 30 can raise the wiper 20 in the ascending direction D1, can move the wiper 20 in the wiping direction D3 or the wiping direction D4, and lowers the wiper 20 in the descending direction D2. Can do.

  In the present embodiment, the ascending direction D <b> 1 and the descending direction D <b> 2 are along the Z axis and are orthogonal to the ink ejection surface 17. The ascending direction D1 and the descending direction D2 may be collectively referred to as the vertical direction. The wiping direction D3 and the wiping direction D4 are along the X axis and along the ink ejection surface 17. The wiping direction D3 is a direction from the third region A3 to the outside of the second region A2 via the first region A1, and the wiping direction D3 is a positive direction of the X axis. The wiping direction D4 is a direction from the second region A2 to the outside of the third region A3 via the first region A1, and the wiping direction D4 is a negative direction of the X axis.

  The moving mechanism 30 moves the wiper 20 in the wiping direction D3 or the wiping direction D4 along the ink discharge surface 17 in a state where the wiper 20 is in contact with the ink discharge surface 17. Therefore, the wiper 20 can wipe the ink discharged from the nozzle 11 or the ink Nf discharged from the nozzle 11 and attached to the ink discharge surface 17. In addition, the wiper 20 wipes off unnecessary materials attached to the ink ejection surface 17. The wiper 20 has elasticity and has a flat plate shape. The wiper 20 is made of, for example, synthetic rubber (for example, EPDM (ethylene-propylene-diene terpolymer)) or synthetic resin.

  Next, the operation of the wiper 20 will be described with reference to FIGS. FIG. 4A to FIG. 4D show the n-th wiping. n is an integer of 2 or more. The wiper 20 operates as follows by the moving mechanism 30 that is controlled and driven by the control unit 50.

  That is, as shown in FIG. 4A, the ink Nv is attached to the tip of the wiper 20 before wiping is started. The ink Nv is ink remaining at the tip of the wiper 20 by wiping performed last time, and is thickened by contact with air. Hereinafter, the reference character Nv is given to the thickened ink having high viscosity.

  The wiper 20 ascends in the ascending direction D1 from the wiping standby position in the wiping direction D4 toward the second area A2 as the wiping start area. Then, the tip of the wiper 20 is pressed against the second region A2, and the wiper 20 stops rising. As a result, the ink Nv adheres to the second area A2. The wiping standby position in the wiping direction D4 is a position immediately below the second area A2.

  As shown in FIG. 4B, since the nozzle 11 discharges the ink Nf, the ink Nf remains in the first area A1. The viscosity of the ink Nf is lower than the viscosity of the ink Nv attached to the tip of the wiper 20. The wiper 20 moves in the wiping direction D4 from the second area A2 toward the third area A3 while keeping the position in the vertical direction constant. As a result, the ink Nf remaining in the first area A1 is wiped off by the wiper 20.

  As shown in FIG. 4C, the wiper 20 moves in the wiping direction D4 until it passes the outer end of the third region A3. As shown in FIG. 4D, the wiper 20 descends in the descending direction D2 after passing through the outer end of the third region A3. Then, the wiper 20 returns to the wiping standby position in the wiping direction D3 and ends the n-th wiping. The wiping standby position in the wiping direction D3 is a position immediately below the third region A3.

  FIG. 5A to FIG. 5E show the (n + 1) -th wiping. As shown in FIG. 5A, the ink Nv is attached to the tip of the wiper 20. The ink Nf adhering to the tip of the wiper 20 described with reference to FIG. 4D is thickened by contact with air, and the ink Nf changes to the ink Nv. Therefore, the ink Nv adheres to the tip of the wiper 20 shown in FIG. Ink Nv adheres to the second region A2.

  As shown to Fig.5 (a), the wiper 20 raises to the raise direction D1 toward 3rd area | region A3 as a wiping start area | region from a standby position. Then, the tip of the wiper 20 is pressed against the third region A3, and the wiper 20 stops rising. As a result, the ink Nv adheres to the third area A3.

  As shown in FIG. 5B, the nozzle 11 discharges the ink Nf. The wiper 20 moves in the wiping direction D3 from the third area A3 toward the second area A2 while maintaining the position in the vertical direction constant. As a result, the ink Nf remaining in the first area A1 is wiped off by the wiper 20.

  As shown in FIG. 5C, the wiper 20 moves in the wiping direction D3 with the low-viscosity ink Nf, and reaches the end Pe on the first area A1 side of the ink Nv adhering to the second area A2. Stop for a certain period of time at the point of contact. Since the ink Nf adhering to the tip of the wiper 20 has a lower viscosity than the ink Nv, the high-viscosity ink Nv adhering to the second region A2 is dissolved by the ink Nf. In FIG. 5C, the ink Nv dissolved by the ink Nf is indicated by a broken line. The end Pe is an end along the wiping direction D3 of the ink Nv.

  As shown in FIG. 5D, after the wiper 20 stops at the end Pe for a certain time, the wiper 20 moves again in the wiping direction D3 while maintaining the position in the vertical direction constant. Move until it passes the outer edge. Since the ink Nv adhering to the second region A2 is dissolved, the wiper 20 can easily wipe the ink Nv. Accordingly, it is possible to suppress the accumulation of the ink Nv in the second area A2 as the wiping start area. As a result, contamination of the recording medium T with the accumulated ink can be suppressed.

  As shown in FIG. 5E, the wiper 20 descends in the descending direction D2 after passing through the outer end of the second region A2. Then, the wiper 20 returns to the wiping standby position in the wiping direction D4 and ends the (n + 1) th wiping.

  FIG. 6A to FIG. 6E show the (n + 2) -th wiping. As shown in FIG. 6A, the ink Nv is attached to the tip of the wiper 20. The ink Nf adhering to the tip of the wiper 20 described with reference to FIG. 5E is thickened by contact with air, and the ink Nf changes to the ink Nv. Accordingly, the ink Nv adheres to the tip of the wiper 20 shown in FIG. Ink Nv adheres to the third region A3.

  As shown in FIG. 6A, the wiper 20 rises in the rising direction D1 from the standby position toward the second area A2 as the wiping start area. Then, the tip of the wiper 20 is pressed against the second region A2, and the wiper 20 stops rising. As a result, the ink Nv adheres to the second area A2.

  As shown in FIG. 6B, the nozzle 11 discharges the ink Nf. The wiper 20 moves in the wiping direction D4 from the second area A2 toward the third area A3 while keeping the position in the vertical direction constant. As a result, the ink Nf remaining in the first area A1 is wiped off by the wiper 20.

  As shown in FIG. 6C, the wiper 20 moves in the wiping direction D4 with the low-viscosity ink Nf, and reaches the end Pe on the first area A1 side of the ink Nv adhering to the third area A3. Stop for a certain period of time at the point of contact. Since the ink Nf attached to the tip of the wiper 20 has a lower viscosity than the ink Nv, the high-viscosity ink Nv attached to the third region A3 is dissolved by the ink Nf. In FIG. 6C, the ink Nv dissolved by the ink Nf is indicated by a broken line. The end Pe is an end along the wiping direction D4 of the ink Nv.

  As shown in FIG. 6D, after the wiper 20 stops at the end portion Pe for a certain period of time, the wiper 20 moves again in the wiping direction D4 while maintaining the position in the vertical direction constant, and in the third region A3. Move until it passes the outer edge. Since the ink Nv adhering to the third region A3 is dissolved, the wiper 20 can easily wipe the ink Nv. Therefore, it is possible to suppress the accumulation of the ink Nv in the third area A3 as the wiping start area. As a result, contamination of the recording medium T with the accumulated ink can be suppressed.

  As shown in FIG. 6E, the wiper 20 descends in the descending direction D2 after passing through the outer end portion of the third region A3. Then, the wiper 20 returns to the wiping standby position in the wiping direction D3 and ends the (n + 2) -th wiping.

  As described above, according to the present embodiment, as described with reference to FIG. 5C, the wiper 20 adheres to the second region A2 with the ink Nf having a low viscosity wiped off in the first region A1. Stops at a position where it contacts the ink Nv. Therefore, the ink Nv is dissolved by the ink Nf, and the viscosity becomes low. As a result, the ink Nv remaining in the second area A2 can be easily wiped off, and the ink Nv remaining in the second area A2 as the wiping start area can be suppressed. In addition, by controlling the wiper 20 to stop, the ink Nv remaining in the second region A2 can be suppressed with a simple configuration.

  In addition, as described with reference to FIG. 6C, the wiper 20 is in contact with the ink Nv attached to the third region A3 with the low-viscosity ink Nf wiped in the first region A1. Stop at. Therefore, the ink Nv is dissolved by the ink Nf, and the viscosity becomes low. As a result, the ink Nv remaining in the third area A3 can be easily wiped off, and the ink Nv remaining in the third area A3 as the wiping start area can be suppressed. In addition, by controlling the wiper 20 to stop, the ink Nv remaining in the third region A3 can be suppressed with a simple configuration.

  That is, as described with reference to FIGS. 5C and 6C, the remaining ink Nv can be suppressed in both the second area A2 and the third area A3 as the wiping start area. Therefore, contamination of the recording medium T with the accumulated ink can be effectively suppressed.

  In addition, according to the present embodiment, as described with reference to FIGS. 3 and 5D, the control unit 50 allows the wiper 20 to move after the wiper 20 stops in the second region A2 for a certain period of time. The moving mechanism 30 moves the wiper 20 in the wiping direction D3 so as to go to the outside of the second region A2. Therefore, after the ink Nv attached to the second area A2 is dissolved by the ink Nf, the wiper 20 can easily remove the ink Nv from the second area A2. Similarly, as described with reference to FIG. 6D, the control unit 50 causes the wiper 20 to go outside the third region A3 after the wiper 20 stops in the third region A3 for a certain period of time. Then, the moving mechanism 30 moves the wiper 20 in the wiping direction D4. Therefore, the wiper 20 can easily remove the ink Nv from the third region A3.

  Furthermore, according to the present embodiment, as described with reference to FIGS. 3 and 5C, the control unit 50 performs the first operation from the third region A <b> 3 in the state where the wiper 20 is in contact with the ink ejection surface 17. The wiper 20 is moved by the moving mechanism 30 so as to stop at a position where the ink Nv attached to the second area A2 contacts the end Pe on the first area A1 side via the area A1. Therefore, as shown in FIG. 5D, the wiper 20 can remove most of the dissolved ink Nv from the second region A2 by moving in the wiping direction D3 from the stop position. Similarly, as described with reference to FIGS. 6C and 6D, the wiper 20 can remove most of the dissolved ink Nv from the third region A3.

  Further, according to the present embodiment, the control unit 50 causes the moving mechanism 30 to move the wiper 20 so that the wiper 20 moves up or down with respect to the recording head 10 (FIGS. 4A and 4D). ), FIG. 5 (a), FIG. 5 (e), FIG. 6 (a) and FIG. 6 (e)). Accordingly, the moving mechanism 30 can move the wiper 20 while being in contact with the ink discharge surface 17, or can be moved in the wiping direction D3 or the wiping direction D4 without contacting the wiper 20 with the ink discharge surface 17. .

  Next, the recording head 10 will be described with reference to FIGS. FIG. 7 shows the front of the recording head 10. The ink ejection surface 17 of the recording head 10 is rectangular. A plurality of nozzle formation regions 12 are formed in a staggered pattern along the longitudinal direction of the recording head 10 in the first region A1 of the ink ejection surface 17. The longitudinal direction of the recording head 10 is along the X axis. A plurality of nozzles 11 are opened in each of the trapezoidal nozzle formation regions 12. In FIG. 7, the wiper 20 is disposed at a standby position directly below the third region A3. The width of the wiper 20 is larger than the width of the ink ejection surface 17. The width of the wiper 20 may be the same as the width of the ink discharge surface 17 or may be smaller than the width of the ink discharge surface 17 as long as the wiper 20 is large enough to include the nozzle formation region 12.

  FIG. 8 shows a side surface of the recording head 10. The recording head 10 has an inlet 13 and an outlet 15. At the time of image forming processing or purging processing, ink that has flowed into the inlet 13 from a tank (not shown) flows into the recording head 10 and flows out from the outlet 15. The ink that has flowed into the recording head 10 is ejected from the nozzle 11 during the image forming process, or discharged from the nozzle 11 during the purge process. In the present embodiment, the wiper 20 performs wiping using the ink Nf discharged from the nozzle 11 by the purge process and attached to the ink discharge surface 17.

  Next, the wiper unit 60 will be described with reference to FIGS. 9 and 10. FIG. 9 shows a state where the wiper unit 60 is lowered. The control unit 50 controls the wiper unit 60. When executing the wiping, the control unit 50 moves the wiper unit 60 so as to face the line heads 10K, 10C, 10M, and 10Y. In FIG. 9, only three wipers 20 corresponding to the three recording heads 10 included in the line head 10K are shown.

  The moving mechanism 30 of the wiper portion 60 includes a carriage 31, a support frame 35 that supports the carriage 31, a roller 36, a gap roller 37, a lifting member 38, and a bottom portion 39.

  Each of the elevating members 38 includes a lift member 38a and a shaft 38b. The controller 50 drives a drive source (for example, a motor) to rotate the shaft 38b of the elevating member 38 arranged upstream in the wiping direction D3 in the clockwise direction, and the elevating member arranged downstream in the wiping direction D3. The shaft 38b of 38 is rotated counterclockwise. Then, the fallen lift member 38 a stands from the bottom 39. As a result, as shown in FIG. 10, the carriage 31, the roller 36, the gap roller 37, and the wiper 20 rise together with the support frame 35.

  FIG. 10 shows a state where the wiper unit 60 is raised. The gap roller 37 comes into contact with the head housing 18 to keep the position of the wiper 20 in the vertical direction of the wiper 20 raised and pressed against the ink discharge surface 17 constant. The carriage 31 is movably engaged with the support frame 35 via a roller 36. As the carriage 31 moves in the wiping direction D3 or wiping direction D4, the wiper 20 also moves in the wiping direction D3 or wiping direction D4.

  The three wipers 20 for each of the line heads 10C, 10M, and 10Y perform the same operation as the three wipers 20 for the line head 10K by the moving mechanism 30.

  The embodiments of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiment, and can be implemented in various modes without departing from the gist thereof (for example, (1) to (3) shown below). In order to facilitate understanding, the drawings schematically show each component as a main component, and the thickness, length, number, and the like of each component shown in the drawings are different from the actual for convenience of drawing. . Moreover, the shape, dimension, etc. of each component shown by said embodiment are an example, Comprising: It does not specifically limit, A various change is possible in the range which does not deviate substantially from the effect of this invention.

  (1) As described with reference to FIGS. 3, 5, and 6, the control unit 50 positions the wiper 20 in contact with the end portion Pe of the ink Nv attached to the second region A <b> 2 or the third region A <b> 3. The wiper 20 was moved to the moving mechanism 30 so as to stop. However, the stop position is not limited to this, and the control unit 50 causes the ink Nv attached to the third region A3 from the second region A2 via the first region A1 in a state where the wiper 20 is in contact with the ink ejection surface 17. The wiper 20 is moved to the moving mechanism 30 so as to stop at a position where the wiper 20 comes into contact. In addition, the control unit 50 causes the moving mechanism 30 to move the wiper 20 so that the wiper 20 stops at a position where the wiper 20 contacts the ink Nv attached to the second region A2 or the third region A3.

  For example, as shown in FIG. 3 and FIG. 5C, the control unit 50 moves from the third area A3 to the second area A2 via the first area A1 while the wiper 20 is in contact with the ink ejection surface 17. The wiper 20 may be moved to the moving mechanism 30 so as to stop at a position where it comes into contact with the central portion Pc of the adhered ink Nv. The central portion Pc is a central portion along the wiping direction D3 of the ink Nv. As shown in FIG. 6C, the control unit 50 moves the wiper 20 to the moving mechanism 30 so that the wiper 20 stops at a position where the wiper 20 contacts the central portion Pc of the ink Nv attached to the third region A3. It may be moved. The central portion Pc is a central portion along the wiping direction D4 of the ink Nv.

  (2) As described with reference to FIG. 2, the head unit 3 includes the four color line heads 10 </ b> K to 10 </ b> Y, but the head unit 3 may include a single color line head or other than the four color line heads. Multiple color line heads may be included.

  (3) As described with reference to FIG. 2, three recording heads 10 are prepared for one color. However, a single recording head 10 may be prepared for one color. A plurality of recording heads 10 other than three may be prepared.

  The present invention can be used in the field of inkjet recording apparatuses.

DESCRIPTION OF SYMBOLS 1 Inkjet recording device 10 Recording head 11 Nozzle 20 Wiper 30 Moving mechanism 50 Control part A1 1st area | region A2 2nd area | region A3 3rd area | region Nv Ink Nf Ink Pe End part Pc Center part

Claims (6)

A recording having an ink ejection surface including a first area where an ink ejection nozzle is opened, a second area adjacent to one end of the first area, and a third area adjacent to the other end of the first area. Head,
With wiper,
A moving mechanism for moving the wiper in contact with the ink ejection surface ;
Bei example a control unit for moving the wiper before Symbol moving mechanism,
In the second region, ink thickened by contact with air is attached,
The control unit moves the wiper to the moving mechanism so that the wiper is pressed against the third region, and ink remaining at the tip of the wiper is attached to the third region,
The nozzle discharges ink having a viscosity lower than that of the thickened ink attached to the second region,
The wiper stops at a position in contact with the thickened ink adhering to the second region from the third region via the first region while being in contact with the ink ejection surface, Dissolving the thickened ink adhering to the second region by the low viscosity ink discharged from the nozzle;
The control unit moves the wiper to the moving mechanism so that the wiper is pressed against the second region, and the ink remaining on the tip of the wiper is attached to the second region,
The nozzle discharges ink having a lower viscosity than the remaining ink attached to the third region,
The wiper stops at a position in contact with the remaining ink adhering to the third region from the second region through the first region while being in contact with the ink ejection surface. An ink jet recording apparatus in which the remaining ink adhering to three regions is dissolved by the low viscosity ink discharged from the nozzle .
Before SL control unit, the wiper of the first region side of the ink whose viscosity the increase that has adhered to the second region via the first region from the third region in contact with the ink discharge surface The ink jet recording apparatus according to claim 1, wherein the wiper is moved by the moving mechanism so as to stop at a position in contact with the end.
Prior Symbol controller, a position where the wiper is in contact with the central portion of the ink whose viscosity the increase that has adhered to the second region via the first region from the third region in contact with the ink discharge surface The ink jet recording apparatus according to claim 1, wherein the wiper is moved by the moving mechanism so as to stop at a point.
The said control part moves the said wiper to the said moving mechanism so that the said wiper goes to the exterior of the said 2nd area | region, after the said wiper stops. Inkjet recording apparatus .
Before SL control unit, after the wiper is stopped, so that the wiper is directed to the outside of the third area, move the wiper to said moving mechanism, to any one of claims 1 to 4 The ink jet recording apparatus described.
  In the first region, a plurality of nozzle formation regions are formed along the longitudinal direction of the recording head,
  In each of the plurality of nozzle formation regions, the nozzle is open,
  6. The inkjet recording apparatus according to claim 1, wherein a width of the wiper is smaller than a width of the ink discharge surface and larger than the nozzle formation region.

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