JP2021123005A - Wiper mechanism and wiper - Google Patents

Abstract

To improve ink wiping performance with a simple structure in a wiper mechanism and a wiper.SOLUTION: A wiper mechanism 1 includes: a wiper 11 which wipes a nozzle surface 112a-1 of inkjet heads 111, 112 (head modules 111a, 112a) in a bending state; and an ink receiving part 30 which receives an ink (for example, a purge ink PI) wiped by the wiper 11. The wiper 11 contacts with the nozzle surface 112a-1 to form a curved area A1 when wiping. In the curved area A1, an uneven part 11b, in which surface roughness is larger than that of its periphery, is integrally formed spaced apart from a tip 11c of the wiper 11 toward the root side by the same material.SELECTED DRAWING: Figure 9

Description

The present invention relates to a wiper that wipes the nozzle surface of an inkjet head and a wiper mechanism provided with the wiper.

Conventionally, a wiper (wiper blade) may be used to clean the nozzle surface of the inkjet head. Some wipers are made of a rubber material that does not absorb ink and scrapes it off, and some wipers are made of a porous material such as a sponge that absorbs and wipes off ink.

Further, there has been proposed a wiper in which a groove for removing the wiped ink is provided in the wiper and a suction member for sucking the ink is arranged in the groove (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2009-269327

As described above, the wiper made of a porous material absorbs ink, so it is easy to clean the nozzle surface without wiping it off, but it is used as a consumable item to absorb ink, or the absorbed ink is squeezed. There are disadvantages such as the need for a mechanism to take it.

On the other hand, a wiper made of a rubber material is suitable for repeated wiping. However, the rubber material hardly absorbs ink. Since the vicinity of the tip of the wiper in contact with the nozzle surface of the head of the inkjet head is elastically deformed into an R shape, the wiped ink is deposited in the curved region. Then, the accumulated ink adheres to the side surface of the inkjet head and remains, or the wiping residue occurs on the nozzle surface without being completely wiped. There is a concern about image stains due to paper contact with ink.

Further, as described above, the wiper in which the suction member is arranged in the groove has a complicated structure due to the arrangement of the suction member, and it is difficult to apply it to a small inkjet head or the like. Further, since the wiper is made of a plurality of materials, the deformation when the wiper comes into contact with the inkjet head is not uniform in the width direction of the wiper, and there is a concern that the ink wiping property may be deteriorated.

An object of the present invention is to provide a wiper mechanism and a wiper capable of improving ink wiping performance with a simple configuration.

In one aspect, the wiper mechanism comprises a wiper that wipes the nozzle surface of the inkjet head in a curved state and an ink receiving portion that receives the ink wiped by the wiper, and the wiper is attached to the nozzle surface at the time of wiping. A curved region is formed by contacting the wiper, and in the curved region, uneven portions having a surface roughness larger than that of the surroundings are integrally formed of the same material toward the root side at a distance from the tip of the wiper. There is.

According to the above aspect, the ink wiping performance can be improved with a simple configuration.

It is a block diagram which shows the inkjet printing apparatus in one Embodiment. It is a control block diagram which shows the inkjet printing apparatus in one Embodiment. It is a top view which shows the wiper mechanism which concerns on one Embodiment. FIG. 5 is a perspective view showing an IV-IV cross section of FIG. 3 with the head module omitted. FIG. 3 is a sectional view taken along line VV of FIG. It is a front view which shows the wiper mechanism in the wipe position which concerns on one Embodiment. It is a side view which shows the wiper at the time of a wipe which concerns on one Embodiment. It is a front view which shows the wiper which concerns on one Embodiment. It is a perspective view for demonstrating the flow of the purge ink at the time of a wipe in one Embodiment. It is a side view for demonstrating the flow of the purge ink at the time of a wipe in one Embodiment. It is a perspective view for demonstrating the ink flow at the time of a wipe in a comparative example. It is a side view for demonstrating the ink flow at the time of a wipe in a comparative example. It is a front view which shows the wiper which concerns on the 1st modification of one Embodiment. It is a front view which shows the wiper which concerns on the 2nd modification of one Embodiment. It is a front view which shows the wiper which concerns on the 3rd modification of one Embodiment.

Hereinafter, the wiper mechanism and the wiper according to the embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a configuration diagram showing an inkjet printing apparatus 100 according to an embodiment.

FIG. 2 is a control configuration diagram showing the inkjet printing apparatus 100.

It should be noted that the front-back, up-down, and left-right directions shown in FIGS. 1 and 3 to 15, which will be described later, are merely examples when the transport direction of the paper P, which is an example of the medium to be printed, is set to the right. For example, the front-rear direction and the left-right direction are horizontal directions, and the vertical direction is a vertical direction.

As shown in FIG. 1, the inkjet printing apparatus 100 includes a wiper mechanism 1, a printing unit 110, a suction transfer unit 120, an external paper feed unit 130, an internal paper feed unit 141 to 143, and a transfer roller pair 151 to 151. 155 and a resist roller pair 156. Further, as shown in FIG. 2, the inkjet printing apparatus 100 includes a control unit 161, a storage unit 162, an operation panel unit 163, a scanner 164, and a paper ejection unit 165. In FIG. 1, a thick solid line shows a transport path from the external paper feed unit 130 and the internal paper feed units 141 to 143 to the printing unit 110.

The printing unit 110 has, for example, two inkjet heads 111 and 112. As shown in FIG. 3, each of the six inkjet heads 111 and 112 is arranged in a staggered pattern along the main scanning direction (front-back direction) orthogonal to the transport direction (right direction) of the paper P. It has head modules 111a and 112a. That is, in the inkjet heads 111 and 112, six head modules 111a and 112a arranged along the front-rear direction are arranged so as to be alternately displaced in the left-right direction. As an example, the six head modules 111a of one inkjet head 111 eject inks of two colors (for example, black (K) and cyan (C)), and the six head modules 112a of the other inkjet head 112. Discharges inks of two colors (for example, magenta (M) and yellow (Y)) different from those of the inkjet head 111.

The suction transport unit 120 is arranged so as to face the printing unit 110. The transport unit 120 transports the paper P by the transport belt while sucking the paper P, for example. The suction transport unit 120 may be movable to a printing position shown in FIG. 1, a wipe position shown in FIG. 6 below the printing position, and a standby position (not shown) below the wipe position. .. Further, the wiper mechanism 1 at the time of printing shown in FIG. 1 is in a position retracted from below the printing unit 110.

The external paper feed unit 130 and the internal paper feed unit 141 to 143 have paper feed trays 131, 141a, 142a, 143a, scraper rollers 132, 141b, 142b, 143b, and pickup rollers 133, 141c, 142c, 143c. ..

A plurality of sheets P are loaded on the paper feed trays 131, 141a, 142a, and 143a.

The scraper rollers 132, 141b, 142b, and 143b are feeding rollers for feeding and transporting the paper P located at the highest position among the plurality of papers P loaded on the paper feed trays 131, 141a, 142a, and 143a.

The pickup rollers 133, 141c, 142c, and 143c convey the paper P unwound by the scraper rollers 132, 141b, 142b, and 143b.

The transport roller pairs 151 to 155 are arranged in a transport path between the internal paper feed units 141 to 143 and the resist roller pair 156.

Paper P conveyed from the external paper feeding unit 130 and the internal paper feeding units 141 to 143 is abutted against the resist roller pair 156. As a result, the skew of the paper P is corrected.

The control unit 161 shown in FIG. 2 has a processor (for example, a CPU: Central Processing Unit) that functions as an arithmetic processing unit that controls the operation of the entire inkjet printing device 100, and includes a wiper drive unit 40, a printing unit 110, and a suction transport unit. It controls the operation of each part of the inkjet printing device 100 such as 120.

The storage unit 162 is, for example, a ROM (Read Only Memory) which is a read-only semiconductor memory in which a predetermined control program is recorded in advance, or as a work storage area as needed when the processor executes various control programs. RAM (Random Access Memory), which is a semiconductor memory that can be written and read at any time, and a hard disk device.

The operation panel unit 163 functions as an example of an input unit and a display unit of the inkjet printing apparatus 100 by having an operation key for performing various operations, a touch panel, a display for displaying various information, and the like.

The scanner 164 reads image data from the original.

The paper ejection unit 165 has a paper ejection tray on which the paper P printed by the printing unit 110 is loaded, and an ejection roller for ejecting the paper P to the paper ejection tray.

FIG. 3 is a plan view showing the wiper mechanism 1.

FIG. 4 is a perspective view showing an IV-IV cross section of FIG. 3 with the head modules 111a and 112a omitted.

FIG. 5 is a sectional view taken along line VV of FIG.

FIG. 6 is a front view showing the wiper mechanism 1 at the wipe position.

FIG. 7 is a side view showing the wiper 11 at the time of wiping.

FIG. 8 is a front view showing the wiper 11.

In each of the front-back, up-down, and left-right directions shown in FIGS. 3 to 8 and 9 to 15 described later, the wiper mechanism 1 wipes positions between the printing unit 110 and the suction transporting unit 120 as shown in FIG. The direction of the state in.

The wiper mechanism 1 shown in FIG. 3 includes a wiper unit 10, two guide units 20, an ink receiving unit 30, and a wiper drive unit 40.

The wiper unit 10 has, for example, four wipers 11 and a wiper support member 12 that supports these wipers 11.

As described above, the head modules 111a and 112a of the two inkjet heads 111 and 112 are arranged in a staggered pattern so that they are arranged in a total of four rows in the left-right direction. Therefore, a total of 4 wipers 11 are used to wipe the nozzle surfaces 112a-1 of the head modules 111a and 112a in one row (three) (only the nozzle surfaces 112a-1 of the head module 112a are shown in FIG. 5). There are two. The nozzle surface 112a-1 is coated with, for example, an ink-repellent film.

The wiper 11 extends in the extension direction D2, which is upward as shown in FIG. 5, and wipes the nozzle surface 112a-1 in the traveling direction D1 (forward direction) in a curved state as shown in FIG. The wiper 11 is, for example, a wiper blade. The wiper 11 is an elastic body that elastically deforms when it comes into contact with the head modules 111a and 112a (nozzle surfaces 112a-1). The wiper 11 is preferably made of a material such as rubber. As shown in FIG. 5, the tip 11c of the wiper 11 before wiping is located above the nozzle surfaces 112a-1 of the head modules 111a and 112a. As a result, the wiper 11 wipes the nozzle surface 112a-1 in a curved state at the time of wiping.

As shown in FIGS. 7 and 8, the wipe surface 11a in contact with the head module 112a of the wiper 11 has, for example, a rectangular shape. The wiper 11 forms a curved region A1 by coming into contact with the nozzle surface 112a-1 at the time of wiping. The root region A2 of the wiper 11 is located on the root side of the curved region A1. The root region A2 is flat or substantially flat with a smaller degree of curvature than the curved region A1. For example, even if the region is slightly curved, if the tangential direction of the curved surface has an inclination of 15 degrees or less with respect to the extending direction D2, it can be said that the region is not the curved region A1 but the root region A2. Further, regarding the curved region A1, although it is an example, when the distance between the wiper support member 12 (the region supporting the wiper 11) and the nozzle surface 112a-1 is R, the curvature diameter is about R. The wipe surface 11a is a surface on the downstream side in the traveling direction D1 of the wiper 11, but when the wiper 11 wipes in both the front and rear directions in the traveling direction D1, both surfaces become the wipe surface 11a. In that case, the uneven portion 11b described later may be provided on at least one wipe surface 11a.

As shown in FIG. 8, the uneven portion 11b is located at the center of the wipe surface 11a, for example, in the width direction D3 (horizontal direction), toward the root side (lower side) at a distance from the tip end 11c (upper end) of the wiper 11. , The curved region A1 and the root region A2 at the time of wiping are continuously formed. For example, the uneven portion 11b exhibits a rectangular shape that is longer in the extending direction D2 than in the width direction D3. Here, it is desirable that the uneven portion 11b is continuously formed in the curved region A1 and the root region A2 without a gap, but even if the concave-convex portion 11b is intermittently formed over the curved region A1 and the root region A2. good. The width direction D3 (horizontal direction) of the wiper 11 is a direction orthogonal to the traveling direction (forward direction) of the wiper 11 and the extending direction D2 (upward direction) of the wiper 11.

The uneven portion 11b is integrally formed with the wiper 11 with the same material. That is, the uneven portion 11b is a wet region formed by performing rough surface processing such as blasting on the wipe surface 11a. Further, the uneven portion 11b has a larger surface roughness (for example, arithmetic average roughness Ra) than the periphery of the wipe surface 11a.

The uneven portion 11b may be provided in at least a part of the curved region A1 at a portion separated from the tip end 11c. Therefore, the concavo-convex portion 11b does not have to be continuously formed up to the root region A2, but the concavo-convex portion 11b is continuously formed up to the root region A2 which is substantially vertical, so that the head module 111a, The purge ink PI (an example of ink) discharged from the 112a can be easily dropped by gravity.

As shown in FIG. 4, four wipers 11 are attached to the wiper support member 12. Further, as shown in FIGS. 3 and 5, the wiper support member 12 is provided with, for example, a pair of left and right screw holes 12a, 12a penetrating in the front-rear direction.

Each of the two guide portions 20 is, for example, a screw shaft extending in the front-rear direction, and is arranged so as to penetrate the screw holes 12a, 12a of the wiper support member 12. Therefore, the wiper unit 10 can move in the front-rear direction by rotating the guide unit 20.

The ink receiving unit 30 receives ink that falls from the nozzle surfaces 112a-1 of the head modules 111a and 112a together with paper dust and dust. The ink that falls in this way includes the purge ink PI that is dropped by the wipe of the wiper 11.

The ink in the ink receiving unit 30 is tilted at the retracted position shown in FIG. 1 so that the ink in the ink receiving unit 30 is tilted from the discharging unit 30b of the ink receiving unit 30 shown in FIG. It is good to flow to. The ink receiving portion 30 has, for example, a rectangular parallelepiped shape that opens upward. Therefore, the inner bottom surface of the ink receiving portion 30 becomes the ink receiving surface 30a. The ink receiving portion 30 rotatably supports the front end of the guide portion 20.

The wiper drive unit 40 has, for example, two motors 41.

The motor 41 is an example of a driving means (actuator) for driving the wiper 11 (wiper unit 10), and is bonded to, for example, a guide portion 20 by adhesion. The motor 41 moves the wiper unit 10 back and forth as described above by rotating the guide portion 20. The single motor 41 may rotate the two guide portions 20 via the pulley in the drive belt, for example, by rotating the drive belt. Alternatively, only a single motor 41 and a single guide portion 20 may be arranged, and the single guide portion 20 may move the wiper unit 10 in the front-rear direction.

Hereinafter, the wipe of the nozzle surface 112a-1 by the wiper 11 will be described.

9 and 10 are perspective views and side views for explaining the flow of the purge ink PI at the time of wiping.

Before the wiper 11 wipes the nozzle surfaces 112a-1 of the head modules 111a and 112a, first, as shown in FIG. 6, the suction transport unit 120 moves downward from the printing position shown in FIG. 1, and the wiper mechanism 1 Moves between the printing unit 110 and the suction transport unit 120. Further, the head modules 111a and 112a discharge the purge ink PI as shown in FIG. As a result, the purge ink PIs ejected from the plurality of nozzles are gathered and scattered at a plurality of locations.

Then, as described above, the wiper 11 moves in the traveling direction D1 in the extending direction D2 with the tip 11c overlapping the nozzle surfaces 112a-1 of the head modules 111a and 112a. Therefore, the wiper 11 moves in the traveling direction D1 in a state where the tip 11c side is curved backward in the traveling direction D1 and wipes the nozzle surface 112a-1.

As a result, the wiped purge ink PI falls along the wipe surface 11a along with paper dust, dust, and the like on the ink receiving surface 30a of the above-mentioned ink receiving portion 30 in the direction of gravity. When the purge ink PI is dropped, the uneven portion 11b having a surface roughness larger than that of the surroundings guides the purge ink PI to the root region A2, so that the purge ink PI is likely to drop.

As shown in FIG. 9, two mask plates 112a-2 for preventing the paper P from coming into contact with the nozzle surface 112a-1 are provided on both the left and right sides of the nozzle surface 112a-1.

After the wiper 11 wipes the nozzle surfaces 112a-1 of all the head modules 111a and 112a, the head modules 111a and 112a drive the piezo element to eject ink from each nozzle by a flushing operation of ink at the nozzles. It is possible to improve the color mixing. After that, the suction transport unit 120 shown in FIG. 6 moves downward, and the wiper mechanism 1 moves to the retracted position shown in FIG. At this retracted position, it is desirable that the wiper 11 returns to the rear of the traveling direction D1. The suction transport unit 120 rises to a position close to the printing unit 110 when printing is performed, and moves to a further lower standby position when printing is not performed.

As shown in FIGS. 11 and 12, when the wiper 81 in the comparative example in which the uneven portion 11b is not provided on the wipe surface 81a is used, the wiper 81 is provided with the above-mentioned uneven portion 11b. The purge ink PI tends to stay near the tip 81c. Therefore, the purge ink PI easily protrudes from both ends of the wiper 81 in the width direction D3 and easily adheres to the side surface of the head module 112a.

Hereinafter, the wipers 51, 61, and 71 according to the first to third modifications of the present embodiment will be described focusing on the matters different from the above-mentioned wiper 11.

FIG. 13 is a front view showing the wiper 51 according to the first modification.

As shown in FIG. 13, in the curved region A1 of the wiper 51, the wiper 51 has four (plural examples) uneven portions 51b having a surface roughness larger than that of the periphery toward the root side at a distance from the tip 51c. It is integrally formed of the same material. All of the four uneven portions 51b are continuously formed up to the root region A2.

FIG. 14 is a front view showing the wiper 61 according to the second modification.

As shown in FIG. 14, the curved region A1 of the wiper 61 has a surface roughness larger than that of the periphery toward the root side at a distance from the tip 61c. For example, three uneven portions 51b are made of the same material as the wiper 61. It is formed integrally. All of the three uneven portions 61b are continuously formed up to the root region A2. Further, the uneven portion 61b on the left side is continuously formed up to the left end of the wipe surface 61a in the width direction D3, and the uneven portion 61b on the right side is continuously formed up to the right end of the wipe surface 61a in the width direction D3. The left and right uneven portions 61b are curved so as to extend toward the end of the wipe surface 61a in the width direction D3 toward the root side (lower side) opposite to the extension direction D2 of the wiper 61. The left and right uneven portions 61b may be formed continuously up to the end portion in the width direction D3 in the curved region A1, but are continuously formed up to the end portion in the width direction D3 in the root region A2. It is desirable that it is done.

FIG. 15 is a front view showing the wiper 71 according to the third modification.

As shown in FIG. 15, in the curved region A1 of the wiper 71, the uneven portion 71b having a surface roughness larger than that of the periphery is made of the same material as the wiper 71 toward the root side at a distance from the tip 71c toward the root side. It is formed integrally. The uneven portion 71b is continuously formed up to the root region A2. Further, the uneven portion 71b is longer in the width direction D3 (horizontal direction) than the uneven portion 11b shown in FIG. Therefore, the uneven portion 71b exhibits a rectangular shape that is longer in the width direction D3 than in the extension direction D2.

In the present embodiment described above, the wiper 11 wipes the nozzle surfaces 112a-1 of the inkjet heads 111, 112 (head modules 111a, 112a) in a curved state. The wiper 11 forms a curved region A1 by coming into contact with the nozzle surface 112a-1 at the time of wiping. In the curved region A1, uneven portions 11b having a surface roughness larger than that of the surroundings are integrally formed of the same material toward the root side at a distance from the tip 11c of the wiper 11. Further, the wiper mechanism 1 includes a wiper 11 and an ink receiving unit 30 that receives ink wiped by the wiper 11 (for example, purge ink PI).

By the way, the contact angle (wetting property) of a rubber material such as that used for the wiper 11 is, for example, 90 degrees or less, particularly about 10 to 20 degrees. A surface having a contact angle of 90 degrees or less becomes more likely to get wet as the surface becomes rougher. Therefore, if a part of the wipe surface 11a of the wiper 11 is rough, only that part becomes easier to get wet than the other parts. Therefore, as in the present embodiment, the curved region A1 which is the region where the purge ink PI on the tip 11c side of the wiper 11 comes into contact with the liquid is a concavo-convex portion having a large surface roughness, that is, a large surface unevenness. By providing the 11b, the purge ink PI accumulated near the tip 11c of the wiper 11 can be guided in an arbitrary direction such as downward. As a result, the wipe can be performed in a state where the purge ink PI is unlikely to accumulate near the tip 11c of the wiper 11, so that the purge ink PI adheres to the side surfaces of the head modules 111a and 112a and the purge ink PI on the nozzle surface 112a-1 is attached. PI residue can be prevented. Further, since the uneven portion 11b is provided at a distance from the tip end 11c of the wiper 11, the smoothness of the wipe surface 11a that contacts the nozzle surface 112a-1 at the time of wiping is maintained, so that the uneven portion 11b passes through the uneven portion 11b. It is also possible to prevent the purge ink PI from leaking from the tip 11c. Therefore, the wiping performance can be improved.

Further, since the uneven portion 11b is integrally formed with the wiper 11 from the same material, the contact in the width direction D3 when the wiper 11 abuts on the nozzle surface 112a-1 without arranging another member. Pressure uniformity can be maintained. Further, as compared with the embodiment in which another member such as a sponge is fixed to the wiper 11, the configuration can be simplified so that it can be easily applied to the small inkjet heads 111, 112 and the like.

Therefore, according to the present embodiment, the wiping performance of ink (for example, purge ink PI) can be improved with a simple configuration.

Further, in the present embodiment, the uneven portion 11b is continuously formed up to the root region A2 on the root side of the curved region A1.

Therefore, the uneven portion 11b guides the purge ink PI remaining near the tip 11c of the wiper 11 to the root region A2, so that the purge ink PI tends to fall in the direction of gravity from the root region A2 which is substantially vertical. As a result, it is possible to more reliably prevent the purge ink PI from adhering to the side surfaces of the head modules 111a and 112a and the purge ink PI remaining on the nozzle surface 112a-1. Therefore, the wiping performance can be further improved.

Further, in the second modification of the present embodiment, the uneven portion 61b is continuous up to the end of the wipe surface 61a in the width direction D3 orthogonal to the traveling direction D1 of the wiper 61 and the extending direction D2 of the wiper 61. It is formed.

Therefore, the uneven portion 61b guides the purge ink PI to the end portion of the wiper 61 in the width direction D3, so that the purge ink PI propagates through the corner between the wipe surface 61a and the side surface of the wiper 61 by a capillary force and gravity. Easy to fall in the direction. As a result, it is possible to more reliably prevent the purge ink PI from adhering to the side surfaces of the head modules 111a and 112a and the purge ink PI remaining on the nozzle surfaces 112a-1. Therefore, the wiping performance can be further improved.

The present invention is not limited to the above-described embodiment as it is, and the components can be modified and embodied within a range that does not deviate from the gist at the implementation stage. In addition, various inventions can be formed by an appropriate combination of the plurality of components disclosed in the above-described embodiment. For example, all the components shown in the embodiments may be combined as appropriate. It goes without saying that various modifications and applications are possible within the range that does not deviate from the gist of the invention. The inventions described in the claims at the time of filing the application of the present application are described below.

[Appendix 1]
A wiper that wipes the nozzle surface of the inkjet head in a curved state,
It is provided with an ink receiving portion that receives the ink wiped by the wiper.
The wiper forms a curved region by contacting the nozzle surface at the time of wiping.
The curved region is a wiper mechanism characterized in that uneven portions having a surface roughness larger than that of the surroundings are integrally formed of the same material toward the root side at a distance from the tip of the wiper.

[Appendix 2]
The wiper mechanism according to Appendix 1, wherein the uneven portion is continuously formed up to a root region on the root side of the curved region.

[Appendix 3]
The wiper mechanism according to Appendix 1 or 2, wherein the uneven portion is continuously formed up to an end portion of the wipe surface in a width direction orthogonal to the traveling direction and the extending direction of the wiper.

[Appendix 4]
A wiper that wipes the nozzle surface of an inkjet head in a curved state.
The wiper forms a curved region by contacting the nozzle surface at the time of wiping.
The curved region is a wiper characterized in that uneven portions having a surface roughness larger than that of the surroundings are integrally formed of the same material toward the root side at a distance from the tip of the wiper.

1 Wiper mechanism 10 Wiper unit 11, 51, 61, 71 Wiper 11a, 51a, 61a, 71a Wip surface 11b, 51b, 61b, 71b Concavo-convex part 11c, 51c, 61c, 71c Tip 12 Wiper support member 12a Screw hole 20 Guide part 30 Ink receiving part 30a Ink receiving surface 30b Discharge part 40 Wiper drive unit 41 Motor 100 Ink printing device 110 Printing unit 111, 112 Ink head 111a, 112a Head module 112a-1 Nozzle surface 112a-2 Mask plate 120 Adsorption transport unit 130 External Paper feed section 131 Paper feed tray 132 Scraper roller 133 Pickup roller 141, 142, 143 Internal paper feed section 141a, 142a, 143a Paper feed tray 141b, 142b, 143b Scraper roller 141c, 142c, 143c Pickup roller 151-155 Conveyor roller pair 156 Regist roller vs. 161 Control unit 162 Storage unit 163 Operation panel unit 164 Scanner 165 Paper ejection unit A1 Curved area A2 Root area D1 Travel direction D2 Extension direction D3 Width direction P paper PI purge ink

Claims (4)

A wiper that wipes the nozzle surface of the inkjet head in a curved state,
It is provided with an ink receiving portion that receives the ink wiped by the wiper.
The wiper forms a curved region by contacting the nozzle surface at the time of wiping.
The curved region is a wiper mechanism characterized in that uneven portions having a surface roughness larger than that of the surroundings are integrally formed of the same material toward the root side at a distance from the tip of the wiper. The wiper mechanism according to claim 1, wherein the uneven portion is continuously formed up to a root region on the root side of the curved region. The wiper mechanism according to claim 1 or 2, wherein the uneven portion is continuously formed up to an end portion of the wipe surface in a width direction orthogonal to the traveling direction and the extending direction of the wiper. .. A wiper that wipes the nozzle surface of an inkjet head in a curved state.
The wiper forms a curved region by contacting the nozzle surface at the time of wiping.
The curved region is a wiper characterized in that uneven portions having a surface roughness larger than that of the surroundings are integrally formed of the same material toward the root side at a distance from the tip of the wiper.

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