JP2017136795A - Liquid jetting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid jetting device capable of properly wiping a liquid jetting head having a protection section projecting from a nozzle surface.SOLUTION: A liquid jetting device 11 includes: a liquid jetting head 13 which has a nozzle surface 15 in which a nozzle 14 for jetting liquid in a jetting direction Z has an opening 16a and a protection section 16 which has an opening 16a to expose the nozzle surface 15 and projects from the nozzle surface 15 in the jetting direction Z; a first wiping member 19 which wipes the nozzle surface 15 side of the liquid jetting head 13 along a lateral direction DS of the opening 16a intersecting both of a longitudinal direction DL and the jetting direction Z when the opening 16a extends in the longitudinal direction DL intersecting the jetting direction Z; and a second wiping member 22 which wipes the nozzle surface 15 side of the liquid jetting head 13 along the longitudinal direction DL.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a liquid ejecting apparatus such as a printer.

  As an example of a liquid ejecting apparatus, a wiper for nozzle holes that wipes the vicinity of the nozzle holes of the recording head, and a wiper for cap marks that wipes thickened ink such as cap marks attached to the nozzle surface of the recording head with a high pressure. There is an ink jet printer provided (for example, Patent Document 1).

JP 2010-105341 A

  Incidentally, a recording head (liquid ejecting head) that ejects ink, which is an example of a liquid, may be provided with a protective portion that protrudes from the nozzle surface around the nozzle surface. And when it is going to wipe a nozzle surface over a protection part, it will become difficult for a wiper to reach a nozzle surface, and there exists a subject that wiping cannot fully be performed.

  Such a problem is not limited to printers that perform printing by ejecting ink, but is generally common in liquid ejecting apparatuses that wipe off a liquid ejecting head that includes a protective portion that protrudes from an opening surface where a nozzle opens. It has become.

  SUMMARY An advantage of some aspects of the invention is that it provides a liquid ejecting apparatus capable of appropriately wiping a liquid ejecting head having a protective portion protruding from a nozzle surface.

Hereinafter, means for solving the above-described problems and the effects thereof will be described.
A liquid ejecting apparatus that solves the above-described problem has a nozzle surface that opens a nozzle that ejects liquid in the ejecting direction and an opening that exposes the nozzle surface, and includes a protection unit that protrudes in the ejecting direction from the nozzle surface When the ejection head and the opening extend in the longitudinal direction intersecting the ejection direction, the nozzle surface side of the liquid ejection head along the short direction of the opening intersecting both the longitudinal direction and the ejection direction And a second wiping member for wiping the nozzle surface side of the liquid jet head along the longitudinal direction.

  According to this configuration, since the opening provided in the protection unit of the liquid ejecting head has a longitudinal direction and a short direction, the wiping member having a certain length in the direction intersecting the wiping direction is used as the nozzle of the liquid ejecting head. When wiping the surface side, it is easier for the wiping member to enter the opening when wiping in the shorter direction than wiping in the longitudinal direction. Therefore, the 1st wiping member which wipes in a transversal direction can enter an opening, and can wipe off a nozzle surface appropriately. Moreover, since the 2nd wiping member which wipes in a longitudinal direction cannot enter into an opening easily, the protection part which protrudes from a nozzle surface can be wiped off appropriately. Therefore, it is possible to appropriately wipe the liquid ejecting head including the protection portion that protrudes from the nozzle surface where the nozzle opens by the first wiping member and the second wiping member.

  In the liquid ejecting apparatus, the first wiping member is more elastically deformed than the second wiping member, the second wiping member has higher liquid absorbency than the first wiping member, and the first wiping member After wiping the liquid ejecting head in the lateral direction, the second wiping member wipes the liquid ejecting head in the longitudinal direction.

  According to this configuration, since the first wiping member is more easily elastically deformed than the second wiping member, even if a part of the first wiping member is in contact with the protective portion, the other elastically deformed part is in the opening. And the nozzle surface can be wiped off properly. Further, since the second wiping member has higher liquid absorbency than the first wiping member, if the first wiping member has previously wiped the liquid component, the remaining liquid component is removed by wiping the second wiping member. Can be absorbed without leaving. Therefore, the wiping performance of the second wiping member can be kept higher than when wiping with only the second wiping member.

In the liquid ejecting apparatus, when the liquid ejecting head is wiped, the contact pressure with respect to the liquid ejecting head is larger in the second wiping member than in the first wiping member.
According to this configuration, the contact pressure with respect to the liquid ejecting head when wiping the liquid ejecting head is larger in the second wiping member than in the first wiping member. There is a possibility that the jetting performance is deteriorated. In addition, since the protective part protrudes in the ejection direction from the nozzle surface, if the protective part is contaminated, the medium that receives the liquid is easily contaminated. In that respect, the second wiping member does not easily contact the nozzle surface, so even if wiping is performed with a high contact pressure, the nozzle will not be damaged. Can be removed.

In the liquid ejecting apparatus, the liquid ejecting head includes a plurality of the nozzles that form a nozzle row side by side in the longitudinal direction, and the opening exposes the nozzle row.
According to this configuration, the opening of the protection unit has the longitudinal direction extending in the nozzle row provided in the liquid ejecting head, so that a plurality of nozzles constituting the nozzle row can be efficiently exposed through the opening.

In the liquid ejecting apparatus, the protection unit of the liquid ejecting head is provided with a plurality of the openings.
According to this configuration, even when a plurality of nozzle groups are dispersed and arranged at positions distant from each other on the nozzle surface of the liquid ejecting head, the nozzle surface is provided by providing a plurality of openings corresponding to each nozzle group. The area of the opening for exposure can be reduced, and the nozzle can be appropriately protected by the protection part.

  In the liquid ejecting apparatus, the liquid ejecting head performs a recording process by ejecting liquid onto a medium transported in the transport direction, and the liquid ejecting head performs recording in a width direction intersecting the transport direction. A line head having a plurality of nozzles arranged so as to cover the entire range of the medium is configured.

  According to this configuration, the liquid ejecting head constitutes a line head having a plurality of nozzles arranged so that the recording range extends over the entire medium, so that the liquid ejecting head is stopped with respect to the medium conveyed in the conveying direction. Liquid can be jetted. If the medium is moved when the liquid is ejected, the medium is more likely to come into contact with the liquid ejecting head than when the medium is stopped when the liquid is ejected. If this is the case, there is a problem that the medium in contact with the liquid ejecting head gets dirty. In this regard, if the liquid ejecting head is appropriately wiped by the first wiping member and the second wiping member, the medium is less likely to become dirty even when the moving medium contacts the liquid ejecting head.

In the liquid ejecting apparatus, the first wiping member is longer in the width direction than the line head, and the short side direction of the opening is a direction along the transport direction.
According to this configuration, the first wiping member has a longer length in the width direction intersecting the wiping direction than the liquid ejecting head that is a line head, and therefore wipes the entire nozzle surface side of the liquid ejecting head with a single wiping operation. be able to.

  The liquid ejecting apparatus includes an urging member that urges the second wiping member toward the liquid ejecting head, and the second wiping member has a longer length in the transport direction than the line head, and the opening The longitudinal direction is a direction along the width direction.

  According to this configuration, the length of the second wiping member in the transport direction intersecting with the wiping direction is longer than that of the liquid ejecting head that is a line head, and thus the entire nozzle surface side of the liquid ejecting head is wiped by a single wiping operation. be able to.

FIG. 2 is a schematic diagram illustrating a configuration of a liquid ejecting apparatus according to an embodiment. Sectional drawing when the 2nd wiping member wipes in the liquid ejecting apparatus of FIG. Sectional drawing when the 1st wiping member wipes in the liquid ejecting apparatus of FIG. FIG. 4 is a cross-sectional view taken along line 4-4 in FIG. FIG. 6 is a bottom view illustrating a liquid jet head according to a first modification. FIG. 10 is a bottom view illustrating a liquid ejecting head according to a second modification. Sectional drawing which shows the liquid ejecting apparatus of the 3rd modification.

  Hereinafter, an embodiment of a liquid ejecting apparatus will be described with reference to the drawings. The liquid ejecting apparatus is an ink jet printer that performs recording (printing) by ejecting ink, which is an example of liquid, on a medium such as paper.

  As illustrated in FIG. 1, the liquid ejecting apparatus 11 includes a liquid ejecting head 13 that ejects liquid in the ejecting direction Z toward the medium S that is transported in the transporting direction Y, and the liquid ejecting head 13 along the transporting direction Y. A first wiping unit 18 for wiping and a second wiping unit 21 for wiping the liquid jet head 13 along the width direction X of the medium S. In the present embodiment, the width direction X, the transport direction Y, and the ejection direction Z are directions that intersect each other (preferably directions that are orthogonal to each other).

  The liquid ejecting head 13 includes a plurality of nozzles 14 that eject liquid in the ejecting direction Z, a nozzle surface 15 in which the nozzles 14 are opened, and a protection unit 16 that protrudes in the ejecting direction Z from the nozzle surface 15. It is preferable to provide a liquid repellent film on the nozzle surface 15 of the liquid ejecting head 13 in order to suppress adhesion and sticking of the liquid or to stabilize the ejecting operation.

  The protection unit 16 may be a frame-shaped protection plate having an opening 16a that exposes a region of the nozzle surface 15 where the nozzle 14 is open, for example. In the present embodiment, in the opening 16a, the width direction X that intersects both the transport direction Y and the ejection direction Z is the longitudinal direction DL. That is, the opening 16a extends in the width direction X that is the longitudinal direction DL.

  The liquid ejecting head 13 performs recording processing by ejecting liquid as droplets onto the medium S. The liquid ejecting head 13 of the present embodiment constitutes a line head having a plurality of nozzles 14 arranged so that the recording range covers the entire medium S in the width direction X that intersects the transport direction Y.

  In the present embodiment, the plurality of nozzles 14 included in the liquid ejecting head 13 form a nozzle row N aligned in the width direction X. In addition, the large number of nozzles 14 included in the liquid ejecting head 13 constitute a plurality of nozzle groups arranged while being shifted in position in the transport direction Y and the width direction X. The nozzle group is composed of, for example, one or two or more nozzle rows N, and a plurality of nozzle groups are dispersedly arranged in the liquid jet head 13 at positions separated from each other along the transport direction Y and the width direction X. The

  In this case, it is preferable that a plurality of openings 16a of the protection unit 16 are provided so as to correspond to each nozzle group, and each opening 16a exposes one or a plurality of nozzle rows N constituting the nozzle group. The nozzle group may be composed of a plurality of nozzles 14 arranged in the width direction X at regular intervals while being shifted in the transport direction Y.

  It is preferable that the first wiping unit 18 includes a first wiping member 19 that is longer in the width direction X than the liquid jet head 13 that constitutes the line head. The first wiping member 19 wipes the nozzle surface 15 side of the liquid ejecting head 13 in the short direction DS of the opening 16a that is the direction along the transport direction Y.

  The second wiping unit 21 includes a second wiping member 22 that is longer in the transport direction Y than the liquid jet head 13 that constitutes the line head. The second wiping member 22 wipes the nozzle surface 15 side of the liquid jet head 13 along the longitudinal direction DL of the opening 16a that is a direction along the width direction X.

  As shown in FIG. 2, the first wiping member 19 protrudes in the direction opposite to the ejection direction Z so as to overlap the nozzle surface 15 of the liquid ejection head 13 in the ejection direction Z by a predetermined distance dh. The liquid ejecting head 13 is wiped by moving relative to the head 13 in the transport direction Y. The first wiping member 19 is preferably made of a material that is more easily elastically deformed than the second wiping member 22, such as a rubber member or an elastomer.

  The second wiping member 22 is preferably made of a material having higher liquid absorbency than the first wiping member 19, such as a nonwoven fabric. In this case, the second wiping unit 21 includes a roller 23 around which the unused second wiping member 22 is wound, a roller 24 that winds up the second wiping member 22 after use, and the second wiping unit between the rollers 23 and 24. An urging mechanism 25 that urges the member 22 toward the liquid ejecting head 13 and a case 26 that accommodates the rollers 23 and 24 and the urging mechanism 25 may be provided. The urging force of the urging mechanism 25 can be generated by, for example, a leaf spring or a coil spring.

  The urging mechanism 25 includes a pressing roller 27 that wraps the second wiping member 22 between the rollers 23 and 24, and the urging mechanism 25 urges the second wiping member 22 via the pressing roller 27. This is preferable because the second wiping member 22 can be uniformly biased in the transport direction Y. Further, when the thin cloth-like second wiping member 22 is wound around the pressing roller 27 that is not easily elastically deformed, even if the second wiping member 22 receives the urging force of the urging mechanism 25, the second wiping member 22 is hardly deformed.

  When the second wiping member 22 wipes the liquid ejecting head 13, the urging force of the urging mechanism 25 preferably causes the contact pressure of the liquid ejecting head 13 against the protection unit 16 to be higher than that of the first wiping member 19. In addition, the second wiping member 22 is preferably disposed at a position in the ejection direction Z that is in pressure contact with the protection unit 16 but not in contact with the nozzle surface 15. Then, after the first wiping member 19 wipes the liquid ejecting head 13 along the transport direction Y (short direction DS of the opening 16a), the second wiping member 22 moves the liquid ejecting head 13 in the width direction X (opening 16a). It is preferable to wipe along the longitudinal direction DL).

Next, the operation of the liquid ejecting apparatus 11 configured as described above will be described.
When the liquid ejecting head 13 ejects the liquid as droplets, fine mist is generated along with the ejecting operation, and the mist may adhere to the nozzle surface 15 or the protection unit 16 of the liquid ejecting head 13. When the medium S moving near the liquid ejecting head 13 unintentionally contacts the liquid ejecting head 13, if dirt such as mist adheres to the liquid ejecting head 13, the medium S is contaminated. There is a problem.

  In order to solve such a problem, the first wiping unit 18 and the second wiping unit 21 perform wiping that moves relative to the liquid ejecting head 13 and wipes the liquid ejecting head 13 after performing the recording process. Dirt such as liquid adhering to the liquid ejecting head 13 is removed.

  As shown in FIG. 3, even when the first wiping member 19 of the first wiping unit 18 has a plate shape longer than the liquid jet head 13 in the width direction X, the first wiping member 19 is elastically deformed, It becomes possible to wipe off the nozzle surface 15 and the protection part 16 forming the step at the same time. In particular, since the opening 16a of the protection part 16 has the width direction X in the longitudinal direction DL, the first wiping member 19 is elastically deformed and its tip enters the opening 16a and contacts the nozzle surface 15.

  At this time, the portion of the first wiping member 19 that contacts the protective portion 16 is elastically deformed more than the portion that contacts the nozzle surface 15. Therefore, the contact pressure of the first wiping member 19 with respect to the protection part 16 is greater than the contact pressure with which the first wiping member 19 contacts the nozzle surface 15. That is, the first wiping member 19 contacts the nozzle surface 15, but the liquid repellent film on the nozzle surface 15 is less likely to be damaged by reducing the contact pressure.

  As shown in FIG. 4, there are a plurality of openings 16 a in the conveyance direction Y, which is the wiping direction of the first wiping member 19, but the liquid is moved over the plurality of steps by elastically deforming the first wiping member 19. The entire nozzle surface 15 and the protection part 16 of the ejection head 13 can be wiped off.

  Then, after the first wiping member 19 wipes the entire nozzle surface 15 and the protection portion 16 of the liquid ejecting head 13 and substantially removes the adhering liquid, the second wiping member 22 wipes the first wiping member 19 in the wiping direction. The liquid ejecting head 13 is wiped in a wiping direction (width direction X) that intersects (conveying direction Y).

  The second wiping member 22 has a higher contact pressure than the first wiping member 19 due to the urging force of the urging mechanism 25, but the second wiping member 22 is less likely to be elastically deformed. Therefore, the possibility of damaging the liquid repellent film on the nozzle surface 15 is low. In particular, when the liquid ejected by the liquid ejecting head 13 includes an insoluble component such as an inorganic pigment, when the second wiping member 22 performs wiping while absorbing the liquid, the insoluble component that has not been absorbed is absorbed by the nozzle surface 15. Since the liquid repellent film is damaged by being dragged, it is preferable that the second wiping member 22 is not in contact with the nozzle surface 15.

  Further, since the protective part 16 protrudes from the nozzle surface 15, the liquid is easily dried and thickened or fixed, but when the second wiping member 22 is wiped with a high contact pressure, the liquid is thickened or fixed. It is also possible to remove the liquid that has been dripped.

  In addition, the wiping by the 1st wiping member 19 and the 2nd wiping member 22 may be performed in multiple times, and the 1st wiping member 19 and the 2nd wiping member 22 may differ in the frequency | count of wiping. Further, the wiping by the first wiping member 19 and the wiping by the second wiping member 22 may be alternately performed a plurality of times.

  When the second wiping member 22 wipes the liquid jet head 13 while absorbing the liquid, if the second wiping member 22 absorbs the liquid and continues wiping, the wiping is performed because the liquid absorption rate decreases. Performance decreases. In this case, the second wiping unit 21 can be moved relative to the liquid ejecting head 13 while rotating the rollers 23 and 24 so that unused portions of the second wiping member 22 are sequentially brought into contact with the liquid ejecting head 13. If it is, the fall of wiping performance can be controlled.

  Further, when the first wiping member 19 first wipes the liquid ejecting head 13, the liquid adhering to the liquid ejecting head 13 is generally removed by the first wiping member 19, and thereafter the second wiping member 22 performs wiping. If it performs, it will become possible to suppress the fall of the wiping performance of the 2nd wiping member 22, saving the usage-amount of the 2nd wiping member 22. FIG. For example, when replacing the second wiping member 22 that has absorbed the liquid, the replacement frequency of the second wiping member 22 can be reduced by reducing the amount of the liquid absorbed by the second wiping member 22.

According to the above embodiment, the following effects can be obtained.
(1) Since the opening 16a provided in the protection part 16 of the liquid ejecting head 13 has the longitudinal direction DL and the short direction DS, the liquid ejecting head is a wiping member having a certain length in a direction intersecting the wiping direction. When wiping the 13 nozzle surface 15 side, it is easier for the wiping member to enter the opening 16a when wiping in the short direction DS than when wiping in the longitudinal direction DL. Therefore, the 1st wiping member 19 which wipes in the transversal direction DS can enter the opening 16a, and can wipe the nozzle surface 15 appropriately. Moreover, since the 2nd wiping member 22 which wipes in the longitudinal direction DL cannot enter easily into the opening 16a, the protection part 16 which protrudes from the nozzle surface 15 can be wiped appropriately. Therefore, the first wiping member 19 and the second wiping member 22 can appropriately wipe the liquid ejecting head 13 including the protection portion 16 protruding from the nozzle surface 15 where the nozzle 14 is opened 16a.

  (2) Since the first wiping member 19 is more easily elastically deformed than the second wiping member 22, even if a part of the first wiping member 19 is in contact with the protective portion 16, the other elastically deformed portion is open 16a. The nozzle surface 15 can be wiped off properly. Also, since the second wiping member 22 has higher liquid absorbency than the first wiping member 19, if the first wiping member 19 has previously wiped the liquid component, the subsequent wiping of the second wiping member 22 All remaining liquid components can be absorbed. Therefore, the wiping performance of the second wiping member 22 can be kept higher than when wiping with only the second wiping member 22.

  (3) Since the second wiping member 22 has a higher contact pressure with respect to the liquid ejecting head 13 when wiping the liquid ejecting head 13 than the first wiping member 19, the second wiping member 22 contacts the nozzle surface 15. Then, the liquid-repellent film on the nozzle surface 15 and the opening portion of the nozzle 14 may be damaged, and the jetting performance may be deteriorated. Moreover, since the protection part 16 protrudes in the injection direction Z from the nozzle surface 15, if the protection part 16 is contaminated, the medium S or the like that receives the liquid is easily contaminated. In that respect, since the second wiping member 22 is difficult to contact the nozzle surface 15, the nozzle 14 is not damaged even if wiping is performed with a high contact pressure, and the second wiping member 22 is attached to the protective portion 16 by wiping with a high contact pressure. Dirt can be reliably removed.

  (4) Since the opening 16a of the protection unit 16 extends in the longitudinal direction DL in the direction in which the nozzle row N provided in the liquid jet head 13 extends, the plurality of nozzles 14 constituting the nozzle row N are efficiently exposed through the opening 16a. Can be made.

  (5) Even when a plurality of nozzle groups are dispersedly arranged on the nozzle surface 15 of the liquid jet head 13, the nozzle surface 15 is provided by providing a plurality of openings 16 a corresponding to each nozzle group. The area of the opening 16 a for exposing the nozzle 14 can be reduced, and the nozzle 14 can be appropriately protected by the protection unit 16.

  (6) Since the liquid ejecting head 13 constitutes a line head having a plurality of nozzles 14 arranged so that the recording range covers the entire medium S, the liquid ejecting head 13 stops with respect to the medium S conveyed in the conveying direction Y. The liquid can be ejected in a state. When the medium S is moved when the liquid is ejected, the medium S is more likely to contact the liquid ejecting head 13 than when the medium S is stopped when the liquid is ejected. If such dirt is adhered, there is a problem that the medium S that has come into contact with the liquid ejecting head 13 becomes dirty. In this regard, if the liquid ejecting head 13 is appropriately wiped by the first wiping member 19 and the second wiping member 22, the medium S is not easily contaminated even when the moving medium S contacts the liquid ejecting head 13.

  (7) Since the first wiping member 19 has a length in the width direction X that intersects the wiping direction (conveying direction Y) longer than the liquid ejecting head 13 that is a line head, the nozzle surface of the liquid ejecting head 13 in one wiping operation The entire 15 side can be wiped off.

  (8) Since the second wiping member 22 has a length in the transport direction Y that intersects the wiping direction (width direction X) longer than the liquid ejecting head 13 that is a line head, the nozzle surface of the liquid ejecting head 13 in one wiping operation The entire 15 side can be wiped off.

In addition, you may change the said embodiment like the example of a change shown below. Moreover, you may combine the said embodiment and the following modified example arbitrarily.
As in the first modified example shown in FIG. 5 and the second modified example shown in FIG. 6, in the liquid jet head 13, the direction in which the nozzle row N extends (the direction in which the plurality of nozzles 14 constituting the nozzle row N are arranged) You may cross | intersect both the width direction X and the conveyance direction Y.

  As in the first modification example illustrated in FIG. 5, the number of nozzle rows N and the number of openings 16 a included in the liquid ejecting head 13 can be arbitrarily changed. Further, the shape of the opening 16 a can be arbitrarily changed depending on the position of the nozzle 14 constituting the nozzle row N.

As in the second modification shown in FIG. 6, the direction of the liquid jet head 13 may intersect both the width direction X and the transport direction Y.
As in the second modified example illustrated in FIG. 6 and the third modified example illustrated in FIG. 7, the number of openings 16 a provided in the protection unit 16 of the liquid ejecting head 13 may be one.

  As in the third modification shown in FIG. 7, the liquid ejecting apparatus 11 includes the housing 12, the guide shaft 31 installed in the housing 12, and the guide shaft 31 guided along the width direction X. And a carriage 32 that reciprocates, and the carriage 32 may be of a serial type that holds the liquid jet head 13. In this case, an on-carriage type in which the liquid container 33 containing the liquid supplied to the liquid ejecting head 13 is held by the carriage 32 may be used, or the liquid container 33 may be moved inside or outside the housing 12 instead of on the carriage 32. It may be an off-carriage type arranged at a position not present.

  In the liquid ejecting apparatus 11 according to the third modified example, the support base 34 that supports the medium S, the second wiping unit 21, the first wiping unit 18, and the capping unit 35 are arranged in the width direction X in the housing 12. It is arranged to line up. Then, printing (recording) on the medium S is performed by alternately performing the ejecting operation of ejecting the liquid while moving the liquid ejecting head 13 along the width direction X and the transporting operation in the transporting direction Y of the medium S. Do. That is, in the case of the serial type liquid ejecting apparatus 11, when the liquid is ejected onto the medium S, the medium S is stopped on the support base 34.

  In the liquid jet head 13 of the third modified example, the nozzles 14 form a nozzle row N aligned in the transport direction Y, and the opening 16a of the protection unit 16 has the transport direction Y as the longitudinal direction DL and the width direction X as the short direction DS. It becomes.

  The capping unit 35 includes a cap 36 that closes a space in which the nozzle 14 opens when it contacts the protection unit 16 of the liquid ejecting head 13, and a suction mechanism 37 that sucks the closed space formed by the cap 36. . The capping unit 35 performs suction cleaning in which the closed space is negatively pressured by driving the suction mechanism 37 and the liquid is discharged from the nozzle 14 as waste liquid.

  When the suction cleaning is executed, the liquid discharged from the nozzles 14 adheres to the nozzle surface 15, so that the liquid ejecting head 13 is moved along the width direction X and the first wiping member 19 performs wiping. Thereby, the liquid adhering to the nozzle surface 15 is almost removed. As described above, the wiping of the liquid ejecting head 13 may be performed by moving the liquid ejecting head 13. When wiping by the first wiping member 19 is not performed, the first wiping member 19 is moved along the ejection direction Z or the conveyance direction Y so that the first wiping member 19 does not unnecessarily contact the moving liquid ejecting head 13. It is preferable to evacuate.

  Further, in the nozzle surface 15 of the liquid ejecting head 13, when the plurality of nozzle groups are dispersed and arranged at positions separated from each other, the first wiping member 19 is configured to be movable along the transport direction Y, Only the nozzle group that needs to be wiped may be wiped, or the nozzle group may be divided and wiped.

  After the wiping by the first wiping member 19, the second wiping member 22 is moved by moving the liquid ejecting head 13 to a position corresponding to the second wiping unit 21 and moving the second wiping unit 21 along the transport direction Y. Wipe with. When the second wiping member 22 does not perform wiping, the second wiping member 22 is moved upstream of the liquid ejecting head 13 in the transport direction Y or in order to prevent the moving liquid ejecting head 13 from unnecessarily contacting the second wiping member 22. It is preferable to retract in the transport direction Y downstream.

  In the full line type liquid ejecting apparatus 11 in which the liquid ejecting head 13 constitutes a line head as in the above embodiment, the liquid is ejected from the nozzle 14 by suction cleaning or pressurizing to discharge the liquid from the nozzle 14 by negative pressure. It is also possible to adopt a configuration capable of performing pressure cleaning that discharges water. Then, the wiping by the first wiping member 19 and the second wiping member 22 may be executed after the cleaning.

  -The 1st wiping member 19 and the 2nd wiping member 22 may be comprised from the same material. In this case, the contact pressure with respect to the liquid ejecting head 13 may be adjusted by adjusting the distance (dh) where the first wiping member 19 and the second wiping member 22 overlap the nozzle surface 15 of the liquid ejecting head 13. Alternatively, the contact pressure with respect to the liquid ejecting head 13 is changed by changing the position of the liquid ejecting head 13 in the ejection direction Z between when the first wiping member 19 wipes and when the second wiping member 22 wipes. May be. When the first wiping member 19 and the second wiping member 22 have the same liquid absorbency, the second wiping member 22 may perform wiping before the first wiping member 19.

  The first wiping member 19 may not be a single member having a uniform cross-sectional shape in the width direction X. For example, a plate-like member divided into a plurality in the width direction X functions as the first wiping member 19. You may do it. In this case, the length in the ejection direction Z and the contact pressure with respect to the liquid ejection head 13 may be different among a plurality of members arranged in the width direction X.

  The first wiping member 19 may not have a uniform length (height) in the injection direction Z. For example, the first wiping member 19 is mainly composed of a portion for wiping the protective portion 16 and a portion for mainly wiping the nozzle surface 15. The length (height) in the injection direction Z may be different.

  The second wiping member 22 may be urged by the urging mechanism 25 as a roller made of an absorbing member whose peripheral surface can absorb liquid. In this case, the second wiping unit 21 may not include the rollers 23 and 24.

  -The 1st wiping member 19 and the 2nd wiping member 22 may perform wiping only by the outward movement to one direction, and may perform wiping by both an outward movement and a backward movement. Alternatively, either the first wiping member 19 or the second wiping member 22 (for example, the first wiping member 19) performs wiping only in the outward movement in one direction, and the other (for example, the second wiping member 22) is for the outward path. You may make it perform wiping by both a movement and a return path | trip movement.

  The liquid ejected by the liquid ejecting head 13 is not limited to ink, and may be, for example, a liquid material in which functional material particles are dispersed or mixed in the liquid. For example, recording is performed by ejecting a liquid material in which a material such as an electrode material or a color material (pixel material) used for manufacturing a liquid crystal display, an EL (electroluminescence) display, and a surface emitting display is dispersed or dissolved. It may be configured.

  The medium S is not limited to paper, but may be a plastic film, a thin plate, or the like, or cloth such as a textile printing apparatus or clothing such as a T-shirt.

  DESCRIPTION OF SYMBOLS 11 ... Liquid ejecting apparatus, 13 ... Liquid ejecting head, 14 ... Nozzle, 15 ... Nozzle surface, 16 ... Protection part, 16a ... Opening, 18 ... 1st wiping unit, 19 ... 1st wiping member, 21 ... 2nd wiping unit 22 ... second wiping member, 23 ... roller, 24 ... roller, 25 ... biasing member, 26 ... case, 27 ... pressing roller, N ... nozzle row, S ... medium, X ... width direction, Y ... transport direction, Z: injection direction, dh: distance, DL: longitudinal direction, DS: short direction.

Claims (8)

A liquid ejecting head having a nozzle face that opens a nozzle that ejects liquid in the ejecting direction and an opening that exposes the nozzle face, and a protective portion that protrudes from the nozzle face in the ejecting direction;
When the opening extends in a longitudinal direction that intersects the ejection direction, the nozzle surface side of the liquid ejection head is wiped along a short direction of the opening that intersects both the longitudinal direction and the ejection direction. 1 wiping member;
A second wiping member for wiping the nozzle surface side of the liquid jet head along the longitudinal direction;
A liquid ejecting apparatus comprising: The first wiping member is more elastically deformed than the second wiping member,
The second wiping member has higher liquid absorbency than the first wiping member,
The liquid ejecting according to claim 1, wherein the second wiping member wipes the liquid ejecting head in the longitudinal direction after the first wiping member wipes the liquid ejecting head in the lateral direction. apparatus. 3. The liquid according to claim 1, wherein a contact pressure with respect to the liquid ejecting head when wiping the liquid ejecting head is larger in the second wiping member than in the first wiping member. 4. Injection device. The liquid ejecting head has a plurality of the nozzles that form a nozzle row side by side in the longitudinal direction,
The liquid ejecting apparatus according to any one of claims 1 to 3, wherein the opening exposes the nozzle row. The liquid ejecting apparatus according to claim 1, wherein a plurality of the openings are provided in the protection unit of the liquid ejecting head. The liquid ejecting head performs a recording process by ejecting liquid onto a medium transported in the transport direction,
The liquid ejecting head constitutes a line head having a plurality of nozzles arranged so that a recording range extends over the entire medium in a width direction intersecting the transport direction. Item 6. The liquid ejecting apparatus according to any one of Items 5 above. The first wiping member is longer in the width direction than the line head,
The liquid ejecting apparatus according to claim 6, wherein the transversal direction of the opening is a direction along the transport direction. An urging member that urges the second wiping member toward the liquid jet head;
The second wiping member is longer in the transport direction than the line head,
The liquid ejecting apparatus according to claim 6, wherein the longitudinal direction of the opening is a direction along the width direction.