CN113199868B - Wiper mechanism - Google Patents

Abstract

The invention provides a wiper mechanism which improves the wiping performance of ink. A wiper mechanism (1) is provided with: a first wiper (11) that wipes the nozzle surface (112 a-1) of the inkjet heads (111, 112) (head modules (111 a, 112 a)); and a second wiper (12) which is arranged on the front side of the first wiper (11) in the traveling direction (D1), is offset from the first wiper (11) in the width direction (D3) perpendicular to the traveling direction (D1), and moves in parallel with the first wiper (11). The first wiper (11) and the second wiper (12) are configured so as to overlap only partially in the direction of travel (D1).

Description

wiper mechanism

technical field

The present invention relates to a wiper mechanism including a wiper for wiping a nozzle surface of an inkjet head.

Background technique

Conventionally, in order to clean the nozzle surface of an inkjet head, a wiper (wiper blade) may be used. Among such wipers, there has been proposed a wiper formed of a plurality of flexible blades arranged in the advancing direction of the wiper at intervals capable of absorbing ink by capillary action (for example, refer to Patent Document 1).

prior art literature

Patent Literature

Patent Document 1: Japanese Patent Laid-Open No. 2001-199076

SUMMARY OF THE INVENTION

The problem to be solved by the invention

However, the wiper may be formed of a rubber material that does not absorb ink but scrapes ink, or a porous material such as a sponge that absorbs and wipes ink.

A wiper made of a porous material can easily clean the nozzle surface without wiping residue because it absorbs ink. However, because it absorbs ink, it is used as a consumable, or there is a mechanism that needs to twist out the absorbed ink. disadvantages etc.

The wiper made of rubber material is suitable for repeated wiping (wipe, wiping). However, the rubber material hardly absorbs ink. Since the vicinity of the tip of the wiper, which is in contact with the nozzle surface of the head of the inkjet head, is elastically deformed into an R shape, the wiped ink accumulates in the curved area. In this way, the accumulated ink adheres and remains on the side surface of the inkjet head, or cannot be wiped off completely, resulting in wiping defects such as wiping residue on the nozzle surface, and further, the ejection of the inkjet head is defective, and the paper contacts the remaining ink. Caused by concerns of image contamination, etc.

In the wiper formed of the above-described plurality of squeegees, wiping failures such as ink deposited on the squeegee ahead in the advancing direction of the wiper and remaining on the side surface of the inkjet head may occur. Therefore, there are concerns about discharge failure of the inkjet head, image contamination due to contact between paper and remaining ink, and the like.

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

means to solve the problem

In one aspect, the wiper mechanism includes: a first wiper that wipes the nozzle surface of the inkjet head; and a second wiper that is disposed on the front side in the traveling direction of the first wiper so as to be opposite to the first wiper. The width direction orthogonal to the travel direction is offset from the first wiper and moves in parallel with the first wiper, and the first wiper and the second wiper are arranged in the travel direction Only partially overlapped.

Invention effect

According to this aspect, the wiping performance of the ink can be improved.

Description of drawings

FIG. 1 is a block diagram showing an ink jet printing apparatus in one embodiment.

FIG. 2 is a diagram showing a control configuration of the inkjet printing apparatus in one embodiment.

3 is a plan view showing a wiper mechanism according to an embodiment.

FIG. 4 is a perspective view showing the IV-IV section of FIG. 3 with the head module omitted.

FIG. 5 is a V-V sectional view of FIG. 3 .

6 is a front view showing a wiper mechanism in a wiping position according to an embodiment.

7 is a perspective view showing a first wiper and a second wiper at the time of wiping in one embodiment.

8 is a front view showing a first wiper and a second wiper during wiping in one embodiment.

9 is a left side view showing the first wiper and the second wiper during wiping in one embodiment.

FIG. 10 is an enlarged perspective view (Part 1) for explaining the flow of the cleaning ink during wiping in one embodiment.

FIG. 11 is an enlarged perspective view (Part 2) for explaining the flow of the cleaning ink during wiping in one embodiment.

FIG. 12 is an enlarged front view for explaining the flow of the cleaning ink during wiping in one embodiment.

FIG. 13 is an enlarged front view for explaining the cleaning ink adhering to the bottom surface of the cover plate in one embodiment.

FIG. 14 is a left side view (one) for explaining the gap between the first wiper and the second wiper in one embodiment.

FIG. 15 is a left side view (part 2) for explaining the gap between the first wiper and the second wiper in one embodiment.

Description of reference numerals

1: wiper mechanism; 10: wiper unit; 11: first wiper; 11a: wiper surface; 12: second wiper; 12a: wiper surface; 12b: side surface; 12c: fixed portion; 13: wiper support 13a: threaded hole; 20: guide portion; 30: ink receiving portion; 30a: ink receiving surface; 30b: discharge portion; 40: wiper drive portion; 41: motor; 100: inkjet printing device; 110: printing 111, 112: inkjet head; 111a, 112a: head module; 112a-1: nozzle face; 112a-1a: nozzle; 112a-2: cover plate; 120: suction conveying part; 130: external paper feeding part ;131: paper feed tray; 132: wiper roller; 133: pick-up roller; 141, 142, 143: internal paper feed section; 141a, 142a, 143a: paper feed tray; 141b, 142b, 143b: wiper roller; 141c, 142c, 143c: pickup roller; 151 to 155: conveying roller pair; 156: registration roller pair; 161: control part; 162: storage part; 163: operation panel part; 164: scanner; 165: paper discharge part ; D1: travel direction; D2: extension direction; D3: width direction; G1, G2: gap; L: overlap length; P: paper; PI: cleaning ink.

Detailed ways

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

FIG. 1 is a block diagram showing an ink jet printing apparatus 100 in one embodiment.

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

In addition, each direction of front-back, up-down, and left-right shown in FIG. 1 and FIGS. 3 to 15 described later is only one example in the case where the conveyance direction of paper P, which is an example of the medium to be printed, is the right direction. For example, the front-rear direction and the left-right direction are the horizontal directions, and the up-down direction is the vertical direction.

As shown in FIG. 1 , the inkjet printing apparatus 100 includes a wiper mechanism 1 , a printing unit 110 , a suction conveying unit 120 , an external paper feeding unit 130 , internal paper feeding units 141 to 143 , a pair of conveying rollers 151 to 155 , and a pair of registration rollers. 156. In addition, 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 discharge unit 165 . In addition, in FIG. 1, the conveyance path which continues from the external paper feed part 130 and the internal paper feed parts 141-143 to the printing part 110 is shown by the thick solid line.

The printing unit 110 has, for example, two ink jet heads 111 and 112 . As shown in FIG. 3 , the inkjet heads 111 and 112 each have six (plurality) head modules arranged in a staggered manner along the main scanning direction (front-rear direction) orthogonal to the conveying direction (right direction) of the sheet P. 111a, 112a. That is, in the ink jet heads 111 and 112, the six head modules 111a and 112a arranged in the front-rear direction are arranged so that their positions in the left-right direction are alternately shifted. In one example, the six head modules 111a of one inkjet head 111 eject ink of two colors (for example, black (K) and cyan (C)), and the six heads of the other inkjet head 112 The sub-module 112a ejects ink of two colors (for example, magenta (M) and yellow (Y)) different from the inkjet head 111 .

The suction conveyance unit 120 is arranged to face the printing unit 110 . The conveying unit 120 conveys the paper P by a conveying belt, for example, while sucking the paper P. Moreover, the suction conveyance part 120 may be movable to the printing position shown in FIG. 1, the wiping position shown in FIG. 6 below the printing position, and the standby position (not shown) below the wiping position. In addition, the wiper mechanism 1 at the time of printing shown in FIG. 1 is located in a position retracted from the lower side of the printing unit 110 .

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

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

The scraping rollers 132, 141b, 142b, and 143b are pull-out rollers that pull out and convey the uppermost sheet P among the plurality of sheets P loaded on the sheet feed trays 131, 141a, 142a, and 143a.

The pickup rollers 133 , 141 c , 142 c , and 143 c convey the paper P drawn out by the scraping rollers 132 , 141 b , 142 b , and 143 b .

The conveyance roller pairs 151 to 155 are arranged on the conveyance path from the internal paper feeding units 141 to 143 to the registration roller pair 156 .

The paper P conveyed from the external paper feeding unit 130 and the internal paper feeding units 141 to 143 comes into contact with the registration roller pair 156 . Thereby, the skew of the paper P is corrected.

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

The storage unit 162 is, for example, a read-only semiconductor memory (ROM (Read Only Memory) in which a predetermined control program is pre-recorded, or a read-only memory) that can be used as a working storage area as necessary when the processor executes various control programs. A RAM (Random Access Memory), a hard disk device, or the like is a semiconductor memory for writing and reading.

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

The scanner 164 reads image data from the original.

The paper discharge unit 165 includes a paper discharge tray on which the paper P printed by the printing unit 110 is loaded, and a discharge roller for discharging the paper P to the paper discharge tray.

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

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

FIG. 5 is a V-V cross-sectional view of FIG. 3 .

FIG. 6 is a front view showing the wiper mechanism 1 in the wiping position.

7-9 is a perspective view, a front view, and a left side view which show the 1st wiper 11 and the 2nd wiper 12 at the time of wiping.

3 to 9 , and FIGS. 10 to 15 to be described later, the front and rear, up and down, and left and right directions are the wiper mechanism 1 positioned between the printing unit 110 and the suction conveying unit 120 as shown in FIG. 6 . The orientation of the state of the location.

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

The wiper unit 10 includes, for example, four first and second wipers 11 and 12 , and a wiper support member 13 that supports these first and second wipers 11 and 12 .

As described above, the head modules 111a and 112a of the two inkjet heads 111 and 112 are arranged in a staggered manner, and are arranged in a total of four rows in the left-right direction. Therefore, a total of four sets of the first wiper 11 and the second wiper 12 are arranged so that one set of the first wiper 11 and the second wiper 12 wipes one row (three) of the head modules 111a and 112a.

As shown in FIG. 5 , the first wiper 11 and the second wiper 12 extend in the upward extending direction D2. The first wiper 11 and the second wiper 12 are, for example, wiper blades. In addition, as shown in FIGS. 7 and 9 , the first wiper 11 and the second wiper 12 are elastically deformed by contacting the head modules 111a and 112a (the nozzle surface 112a-1 or the cover plate 112a-2). Elastomer. The first wiper 11 and the second wiper 12 may be made of a material such as rubber.

As shown in FIG. 4 , the second wiper 12 is arranged on the front side in the traveling direction D1 from the first wiper 11 , and is arranged from the first wiper 11 in the traveling direction D1 with the first wiper 11 and the first wiper. The right side of the width direction D3 orthogonal to the extending direction D2 of 11 is shifted. The first wiper 11 and the second wiper 12 are arranged so as to overlap only partially (the overlapping length L in the width direction D3 shown in FIG. 8 ) in the traveling direction D1 . The region arranged to overlap in this way does not overlap with the nozzles 112a-1a (nozzle row) on the nozzle surface 112a-1 in the traveling direction D1.

Moreover, the 2nd wiper 12 moves in parallel with the 1st wiper 11 on the front side in the advancing direction D1 of the 1st wiper 11, and makes the later-mentioned FIG. 10 - FIG. The details of the transfer of the cleaning ink PI (an example of the ink) shown at 12 will be described later.

In addition, as shown in FIG. 7 , the second wiper 12 covers a cover plate 112a- which is an example of a surface located below the nozzle surface 112a-1 in the head module 112a (the inkjet heads 111 and 112). 2 to wipe the bottom surface. Moreover, in the form etc. which abbreviate|omit the cover plate 112a-2, the 2nd wiper 12 may wipe the nozzle surface 112a-1. In addition, there may be no steps on the nozzle surface 112a-1 wiped by the first wiper 11 and the surface wiped by the second wiper 12 (eg, the bottom surface of the cover plate 112a-2). In addition, although the 2nd wiper 12 is arrange|positioned at the right side in the width direction D3 of the 1st wiper 11, it may be arrange|positioned at the right and left sides in the width direction D3. In addition, the nozzle row may be arranged on the nozzle surface 112 a - 1 wiped by the second wiper 12 .

The first wiper 11 wipes the nozzle surface 112a-1 (only the nozzle surface 112a-1 of the head module 112a is shown in FIGS. 7 to 9). The second wiper 12 is applied to, for example, the cover plate 112a-2 (only the cover plate 112a-2 of the head module 112a is shown in FIGS. 7 to 9) for preventing the paper P from contacting the nozzle surface 112a-1. Wipe the underside. The cover plate 112a-2 covers a part of the nozzle surface 112a-1 (for example, MEMS (MicroElectro Mechanical Systems) that controls the ejection of the nozzle 112a-1a) and covers the head module 112a. It is a metal plate in which the part covered by the side surface is orthogonal, for example, L-shaped when viewed from the rear. Further, on the nozzle face 112a-1, for example, an ink repellent film is coated. In addition, the wettability of the cover plate 112a-2 is higher than the wettability of the nozzle surface 112a-1.

As shown in FIGS. 7 and 9 , the first wiper 11 wipes the nozzle face 112a-1 in a state where a part of the front end side (upper end side) is bent when wiping, and the second wiper 12 wipes off the front end side (the upper end side) when wiping. The bottom surface of the cover plate 112a-2 is wiped off in a state where a part of the upper end side is bent. Moreover, the wiping surfaces 11a and 12a which are the surfaces on the downstream side of the advancing direction D1 of the 1st wiper 11 and the 2nd wiper 12 have a rectangular shape as shown in FIG. 8, for example.

As shown in FIG. 4 , four first wipers 11 and four second wipers 12 are attached to the wiper support member 13 . The position of the second wiper 12 in the traveling direction D1 can be adjusted, for example, in accordance with the degree of insertion of the fixing portion 12c that fixes the second wiper 12 to the wiper support member 13 into the wiper support member 13 and the like. is fixed to the wiper support member 13 . Moreover, the fixing|fixed part 12c is an example of the clearance gap adjustment part which adjusts the clearance gap in the advancing direction D1 of the 1st wiper 11 and the 2nd wiper 12. As the gap adjusting portion, the gap between the first wiper 11 and the second wiper 12 in the traveling direction D1 may be adjusted by moving at least one of the first wiper 11 and the second wiper 12 . Can.

Moreover, as shown in FIG.3 and FIG.5, the wiper support member 13 is provided with a pair of right and left screw holes 13a and 13a penetrating, for example, in the front-rear direction.

The two guide portions 20 are, for example, screw shafts extending in the front-rear direction, respectively, and are arranged so as to penetrate through the screw holes 13 a and 13 a of the wiper support member 13 . Therefore, by rotating the guide part 20, the wiper unit 10 can be moved in the front-rear direction.

The ink receiving portion 30 receives ink dropped from the nozzle surfaces 112a-1 of the head modules 111a and 112a together with paper dust, dust, and the like. The ink thus dropped includes the cleaning ink PI dropped by the wiping of the first wiper 11 and the second wiper 12 .

The ink in the ink receiving portion 30 can flow from the discharge portion 30b of the ink receiving portion 30 shown in FIG. 3 to the waste liquid accommodating portion via a waste liquid path (not shown) by inclining the wiper mechanism 1 at the retracted position shown in FIG. 1 . . The ink receiving portion 30 has, for example, a rectangular parallelepiped shape opened upward. Therefore, the inner bottom surface of the ink receiving portion 30 becomes the ink receiving surface 30a. In addition, 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 drive device (actuator) that drives the wiper unit 10 (the first wiper 11 and the second wiper 12 ), and is coupled to the guide portion 20 by, for example, bonding. The motor 41 moves the wiper unit 10 back and forth as described above by rotating the guide portion 20 . In addition, for example, the driving belt may be rotated by a single motor 41, and the two guide portions 20 may be rotated via pulleys in the driving 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 wiping of the nozzle surface 112a-1 by the first wiper 11 and the wiping of the bottom surface of the cover plate 112a-2 by the second wiper 12 will be described.

10 and 11 are enlarged perspective views for explaining the flow of the cleaning ink PI during wiping.

FIG. 12 is an enlarged front view for explaining the flow of the cleaning ink PI during wiping.

FIG. 13 is an enlarged front view for explaining the cleaning ink PI attached to the bottom surface of the cover plate 112a-2.

14 and 15 are left side views for explaining the gaps G1 and G2 between the first wiper 11 and the second wiper 12 .

Before the first wiper 11 and the second wiper 12 wipe, first, as shown in FIG. 6 , the suction conveyance unit 120 is moved to a position below the printing position shown in FIG. 1 , and the wiper mechanism 1 is moved to Between the printing unit 110 and the suction conveying unit 120 . In addition, as shown in FIGS. 10 and 12 , the head modules 111a and 112a eject the cleaning ink PI. As a result, the cleaning ink PI ejected from the plurality of nozzles 112a-1a shown in FIG. 7 is dispersed in a concentrated manner at a plurality of locations.

Then, the first wiper 11 and the second wiper 12 travel along the state in which the front ends overlap the nozzle surfaces 112a-1 of the head modules 111a and 112a and the bottom surface of the cover plate 112a-2 in the extending direction D2. Move in direction D1. Therefore, the 1st wiper 11 and the 2nd wiper 12 wipe while moving to the advancing direction D1 in the state which the front-end|tip side is warped and bent backward in the advancing direction D1.

Thereby, as shown in FIGS. 10 and 11 , the cleaning ink PI wiped off by the first wiper 11 is transmitted along the wiping surface 11 a of the first wiper 11 and the side surface 12 b (left side surface) of the second wiper 12 . , and falls to the ink receiving surface 30 a of the ink receiving portion 30 in the direction of gravity together with paper dust, dust, and the like.

Here, as shown in FIG. 13 , even if the cleaning ink PI adheres to the bottom surface of the masking plate 112a-2, since the bottom surface of the masking plate 112a-2 has higher wettability than the nozzle surface 112a-1 and is located below, cleaning is performed. It is also difficult for the ink PI to return to the nozzle face 112a-1 from the bottom face of the cover plate 112a-2.

Incidentally, in order to transmit the cleaning ink PI wiped off by the first wiper 11 along the side surface 12b of the second wiper 12, for example, the second wiper 12 shown in FIGS. 4 and 5 may be used As shown in FIG. 14, the gap G1 between the first wiper 11 and the second wiper 12 is adjusted so that the cleaning ink PI is easily dropped by capillary force. As an example, the thickness of the first wiper 11 and the second wiper 12 in the traveling direction D1 is 0.5 mm, and the gaps G1 are 2 mm and 3 mm.

As shown in FIG. 15 , if the gap G2 between the first wiper 11 and the second wiper 12 is too large, the cleaning ink PI wiped off by the first wiper 11 does not follow the side surface 12 b of the second wiper 12 transfer. On the other hand, when the 1st wiper 11 and the 2nd wiper 12 are arrange|positioned in contact, the contact pressure with respect to the nozzle surface 112a-1 becomes uneven in the width direction D3 of the 1st wiper 11.

The gaps G1 and G2 between the first wiper 11 and the second wiper 12 can be determined according to the physical properties (for example, viscosity, wettability) of the cleaning ink PI, and the cleaning amount (for example, caused by changes in the physical properties of the ink over time) Changes in discharge properties), etc., the materials of the first wiper 11 and the second wiper 12, and the like are adjusted. In addition, in order to facilitate the transfer of the cleaning ink PI wiped off by the first wiper 11 along the side surface 12 b of the second wiper 12 , the first wiper 11 may be located on the side of the second wiper 12 in the first wiper 11 . The right end portion of the first wiper 11 is inclined so that it is positioned rearward in the traveling direction D1 than the left end portion of the first wiper 11 .

After the first wiper 11 and the second wiper 12 wipe off all the head modules 111a and 112a (the nozzle surface 112a-1 and the cover plate 112a-2), the head modules 111a and 112a drive the piezoelectric elements, and the piezoelectric elements are driven from the head modules 111a and 112a. The flushing action of the ink ejected from the nozzles 121a-1a can improve the color mixing of the inks in the nozzles 121a-1a. After that, the suction conveyance unit 120 shown in FIG. 6 moves downward, and the wiper mechanism 1 moves to the retracted position shown in FIG. 1 . In this retracted position, the wiper unit 10 is preferably returned to the rear in the traveling direction D1. The suction conveyance unit 120 rises to a position close to the printing unit 110 when printing is performed, and moves further to a lower standby position when printing is not performed.

In the present embodiment described above, the wiper mechanism 1 includes: the first wiper 11 for wiping the nozzle surfaces 112a-1 of the inkjet heads 111, 112 (head modules 111a, 112a); and the second wiper The wiper 12 is arranged on the front side of the advancing direction D1 of the first wiper 11 so as to be shifted from the first wiper 11 in the width direction D3 orthogonal to the advancing direction D1, and moves in parallel with the first wiper 11 .

Thereby, even if the cleaning ink PI wiped off by the first wiper 11 accumulates on the first wiper 11 , the cleaning ink PI can be transmitted along, for example, the side surface 12 b of the second wiper 12 and dropped to the ink receiving portion 30 . middle. Therefore, it is possible to suppress that the ink accumulated on the first wiper 11 adheres and remains on the side surfaces of the inkjet heads 111 and 112 (head modules 111a and 112a), or cannot be wiped off completely and remains on the nozzle faces 112a- 1 produces a wiping residue. Therefore, according to this embodiment, the wiping performance of the ink (for example, the cleaning ink PI) can be improved.

In addition, in the present embodiment, the wiper mechanism 1 has a front side in the advancing direction D1 of the first wiper 11 so as to be displaced from the first wiper 11 in the width direction D3 and move in parallel with the first wiper 11 The second wiper 12 of the The capillary force acts between the ends of 12, and the cleaning ink PI can be easily guided downward.

In addition, in the present embodiment, the overlapping region is arranged in the region of the nozzle surface 112a-1 that does not overlap with the nozzle 112a-1a in the traveling direction D1 of the first wiper 11. Thereby, it is possible to suppress the cleaning ink PI from remaining on the nozzles 112a-1a. Therefore, the wiping performance can be further improved.

In addition, this invention is not limited to the said embodiment itself, In the implementation stage, in the range which does not deviate from the summary, the component can be deform|transformed and it can be embodied. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, all the constituent elements shown in the embodiment may be appropriately combined. Of course, various deformation|transformation and application are possible in the range which does not deviate from the meaning of invention. Hereinafter, the invention described in the claims of the first application of the present application will be additionally described.

[Addendum 1]

A wiper mechanism characterized in that,

The wiper mechanism includes:

a first wiper that wipes the nozzle face of the inkjet head; and

The second wiper is disposed on the front side of the traveling direction of the first wiper so as to be offset from the first wiper in the width direction orthogonal to the traveling direction and parallel to the first wiper move,

The first wiper and the second wiper are configured to overlap only partially in the travel direction.

[Addendum 2]

The wiper mechanism according to appendix 1, wherein:

The overlapping region does not overlap the nozzles of the nozzle face in the traveling direction.

Claims (2)

1. A wiper mechanism, characterized in that, The wiper mechanism includes: a first wiper, which wipes the nozzle face of the inkjet head; The second wiper is disposed on the front side of the traveling direction of the first wiper so as to be offset from the first wiper in the width direction orthogonal to the traveling direction and parallel to the first wiper move; and a gap adjustment section that adjusts a gap between the first wiper and the second wiper in the travel direction, The first wiper and the second wiper are configured to overlap only partially in the travel direction. 2. The wiper mechanism of claim 1, wherein The overlapping region does not overlap the nozzles of the nozzle face in the traveling direction.

Images