JP2011161668A - Method for manufacturing liquid jetting head unit, and method for manufacturing liquid jetting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a liquid jetting head unit in which liquid jetting heads are precisely arranged on a plurality of fitting faces, and a method for manufacturing a liquid jetting apparatus. <P>SOLUTION: In the method for manufacturing the liquid jetting head unit having the fitting faces 31A and 31B on which a plurality of head groups 41 constituted with a plurality of the liquid jetting heads 40 are fitted, by using a camera 80 which moves in X-axial and Y-axial directions orthogonally intersecting to an optical axis and takes a photograph of an alignment mark 90 provided on the liquid jetting head 40, the angle of the fitting face 31A is adjusted so that the alignment mark 90 of the liquid jetting head 40 arranged on the fitting face 31A positions on a plane P parallel to the X-axis and Y-axis, and on every fitting face 31A and 31B, each fitting face is adjusted to the angle, and the liquid jetting heads 40 are fixed on the fitting faces 31A and 31B so that the alignment mark 90 is positioned at specified arrangements based on the image photographed by the camera 80. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a method for manufacturing a liquid ejecting head unit that is mounted opposite to a support drum on which a liquid ejecting head rotates, and a method for manufacturing a liquid ejecting apparatus.

As a liquid ejecting apparatus that ejects a liquid onto an ejected medium, for example, an ink jet recording apparatus that performs printing on an ejected medium such as paper or a recording sheet by ejecting ink as a liquid is known.

In addition, as the liquid ejecting apparatus, for example, an apparatus in which an ejected medium is wound around a drum rotating around an axis and printing is performed on the ejected medium by an ink jet recording head provided around the drum is proposed. (For example, refer to Patent Document 1).

Patent Document 1 has a print cartridge carriage fixed to a drum, and the print cartridge carriage is fixed to two frame members and four flat portions provided on the frame members. A liquid ejecting apparatus in which a print cartridge having a liquid ejecting head fixed to a bottom surface is fitted to a base component is disclosed.

In addition, a glass mask provided with a mark for defining the relative positions of the plurality of liquid ejecting heads is used, and an alignment unit provided on the liquid ejecting head with the nozzle opening as a reference is used as a mark on the glass mask. A manufacturing method of a liquid ejecting head that is used and aligned is disclosed (for example, see Patent Document 2).

JP 2000-289279 A (page 4, FIG. 3) JP 2009-172879 A

However, in the liquid ejecting apparatus according to Patent Document 1, each flat portion is inclined with respect to other flat portions in order to direct the liquid ejecting head to the drum, and thus the liquid ejecting head is provided with a plurality of mounting surfaces (flat portions). When it arrange | positions, it is necessary to use the glass mask of the shape match | combined with the inclination of each attachment surface. Such a glass mask is difficult to manufacture and expensive. Furthermore, even if such a glass mask is used, if the image pickup means approaches or separates from the glass mask for each liquid ejecting head corresponding to the inclined surface, the position of the image pickup means can be adjusted depending on the accuracy in the approaching / separating direction. An error occurs. In addition, when zooming in / out of the imaging unit is performed for each liquid ejecting head corresponding to the inclined surface, each mark and alignment mark are imaged at different magnifications, so that an error occurs in alignment.

SUMMARY An advantage of some aspects of the invention is that it provides a method of manufacturing a liquid ejecting head unit and a method of manufacturing a liquid ejecting apparatus in which liquid ejecting heads are accurately arranged on a plurality of mounting surfaces.

According to an aspect of the present invention for solving the above-described problem, there is provided a mounting surface on which a plurality of head groups each composed of a plurality of liquid ejecting heads are mounted so as to be opposed to a supporting drum that supports an ejected medium and rotates around an axis. A method of manufacturing a plurality of liquid ejecting head units, wherein the alignment mark moves in the X-axis and Y-axis directions perpendicular to the optical axis and is provided on the liquid ejecting head and discharges droplets as a reference The imaging means on the mounting surface is positioned such that the alignment mark of the liquid jet head arranged on the one mounting surface is located on a plane parallel to the X axis and the Y axis. For each of the mounting surfaces, the mounting surface is adjusted to the angle, and the alignment mark is based on an image captured by the imaging means. In the method of manufacturing a liquid jet head unit, characterized in that for fixing the liquid jet head so as to be arranged in a predetermined on the mounting surface.
In this aspect, even in a liquid ejecting head unit having a plurality of mounting surfaces, the liquid ejecting head can be positioned without using a glass mask that is suitable for mounting surfaces having different inclined surfaces. In addition, once the position and focus of the imaging unit in the Z-axis direction are adjusted for one mounting surface, it is not necessary to adjust the position and focus of the imaging unit in the Z-axis direction for all the mounting surfaces thereafter. Accordingly, it is possible to attach the liquid ejecting head with high accuracy while avoiding errors associated with movement of the imaging unit in the Z-axis direction and errors associated with zoom-in / zoom-out.

Here, the mounting surface is an intersection point on the peripheral surface of the support drum formed by connecting the center on the mounting surface between the head groups mounted on the mounting surface and the center of the support drum. A plurality of the mounting surfaces are integrally and continuously formed so as to be parallel to a tangent line as a contact point, and the mounting surface with respect to the imaging means with the boundary line of the plurality of mounting surfaces as an axis It is preferable to adjust the angle.
In this aspect, the position of the boundary line can be made constant also by the rotation of the mounting surface. Accordingly, the relative positions of the liquid jet heads with different mounting surfaces can be made more accurate.

According to another aspect of the present invention, there is provided a liquid ejecting head unit having a plurality of mounting surfaces on which a plurality of head groups each composed of a plurality of liquid ejecting heads and a support drum that supports the medium to be ejected and rotates about an axis are mounted. An alignment mark that moves in the X-axis and Y-axis directions orthogonal to the optical axis and that is provided on the liquid-jet head and ejects liquid droplets as a reference The alignment mark of the liquid ejecting head arranged on one of the mounting surfaces uses the imaging means for imaging the X-axis and the Y-axis.
An angle of the mounting surface with respect to the imaging unit is adjusted so that the mounting surface is positioned in a plane parallel to the axis, and the mounting surface is adjusted to the angle for each of the mounting surfaces, based on an image captured by the imaging unit. The liquid jet head is fixed to the mounting surface so that the alignment marks are in a predetermined arrangement to form a liquid jet head unit, and the liquid jet head unit has a boundary line between the mounting surfaces adjacent to each other. The method of manufacturing a liquid ejecting apparatus is characterized in that the liquid ejecting apparatus is arranged so as to be parallel to an axial direction of a rotating shaft of a support drum.
According to this, a liquid ejecting apparatus including a liquid ejecting head unit in which liquid ejecting heads are accurately arranged on a plurality of mounting surfaces is provided.

1 is a schematic perspective view of a liquid ejecting apparatus according to Embodiment 1. FIG. FIG. 3 is a side view illustrating a main part of the liquid ejecting apparatus according to the first embodiment. FIG. 3 is a plan view of the liquid jet head unit according to the first embodiment. FIG. 3 is a cross-sectional view of a main part of the liquid jet head unit according to the first embodiment. FIG. 3 is an enlarged side view of a main part of the liquid jet head according to the first embodiment. FIG. 6 is a side view illustrating the method for manufacturing the liquid jet head unit according to the first embodiment. FIG. 6 is a side view showing a method for positioning the head mounting member according to the first embodiment. It is a schematic block diagram of the apparatus used for the manufacturing method of a liquid jet head unit. FIG. 10 is a side view illustrating the method for manufacturing the liquid jet head unit according to the second embodiment.

Hereinafter, the present invention will be described in detail based on embodiments.
<Embodiment 1>
FIG. 1 is a schematic perspective view of a liquid ejecting apparatus according to an embodiment of the present invention, and FIG. 2 is a side view showing a main part of the liquid ejecting apparatus. As shown in the drawing, the liquid ejecting apparatus 1 according to the present embodiment supplies a drum-shaped support drum 10, a liquid ejecting head unit 20 disposed on the outer periphery of the support drum 10, and an ejection medium S to the support drum 10. And a conveying unit 50 having an exclusion unit 52 that excludes the ejection target medium S from the supply unit 51 and the support drum 10.

The support drum 10 has a rotating shaft 12 that is pivotally supported by a frame 11, and the supporting drum 10 rotates about the rotating shaft 12 in the direction of arrow R shown in FIG. 1. Such a support drum 10
Is rotated by a driving means such as a driving motor (not shown).

Further, the support drum 10 holds the ejection medium S on its peripheral surface. The method for holding the ejection medium S by the support drum 10 is not particularly limited, and examples thereof include a method for sucking and adsorbing the ejection medium S to the surface of the support drum 10. Further, as another method, for example, the ejection target medium S
And a method of charging the outer peripheral surface of the support drum 10 on the support drum 10 by the action of dielectric polarization. Of course, you may make it provide the pressing roller etc. which clamp the to-be-injected medium S between the surfaces of the support drum 10. FIG.

The liquid ejecting head unit 20 includes a head mounting member 30 and a plurality of liquid ejecting heads 40 fixed to the head mounting member 30.

Here, the liquid jet head unit 20 will be described in more detail. Note that FIG.
4 is a plan view of the liquid ejecting head unit on the liquid ejecting surface side, FIG. 4 is a cross-sectional view taken along the line AA ′ of FIG. 3, and FIG. 5 is an enlarged cross-sectional view of the main part of FIG.

As shown in FIGS. 2 and 5, the head mounting member 30 has a plurality of mounting surfaces 31 </ b> A and 31 </ b> B to which the liquid jet head 40 is fixed on one surface side. In the present embodiment, two mounting surfaces 31A and 31B having different inclination angles are provided. The mounting surfaces 31A and 31B are formed on the support drum 1
They are arranged along the rotation direction R of 0.

These two attachment surfaces 31A and 31B are provided so as to be integrated continuously.
Here, that the plurality of mounting surfaces 31A and 31B are continuous refers to the adjacent mounting surfaces 31A and 31.
It means that there is no other surface (surface other than the mounting surfaces 31A and 31B) between B and B. Further, that the mounting surfaces 31A and 31B are integrated means that the head mounting member 30 having a plurality of mounting surfaces 31A and 31B is integrally formed by one member. In the present embodiment, the mounting surfaces 31A and 31B are integrally provided by forming the head mounting member 30 integrally with one member.

A plurality of head groups 41 including a plurality of liquid jet heads 40 are fixed to each of the mounting surfaces 31A and 31B. In the present embodiment, two head groups 41 are fixed to the mounting surfaces 31A and 31B, respectively. As shown in FIG. 3, one head group 41 of the present embodiment is configured by arranging a plurality of liquid ejecting heads 40 along the first direction that is the axial direction of the rotating shaft 12 of the support drum 10. ing. Here, the liquid jet head 40 is provided with one to a plurality of nozzle rows 43 in which a plurality of nozzle openings 42 are arranged in parallel. The liquid ejecting heads 40 of the head group 41 are arranged so that the nozzle openings 42 of the nozzle rows 43 are juxtaposed along the direction in which the liquid ejecting heads 40 are juxtaposed (first direction).

Also, the two head groups 41 attached to the same attachment surfaces 31A and 31B are the first
Are arranged side by side in a second direction (rotation direction R of the support drum 10) that intersects the direction (axial direction) of the two, and the two head groups 41 are arranged at positions slightly shifted in the first direction. That is, the liquid ejecting heads 40 of the two head groups 41 fixed to the same mounting surface 31A or 31B are arranged in a staggered manner, and the liquid ejecting heads 40 of one head group 41 adjacent to each other and the other head group No. 41 liquid jet head 40 is arranged such that the nozzle openings 42 at the ends of the nozzle row 43 are in the same position in the second direction (rotation direction R). Thereby, the nozzle openings 42 can be arranged in parallel at the same pitch along the first direction by the plurality of liquid ejecting heads 40, and printing can be performed in all regions along the first direction.

In addition, in this embodiment, as shown in FIG. 4, the liquid ejecting head 40 is attached to the attachment surfaces 31 </ b> A and 31 </ b> B by providing a through hole 32 that penetrates the head attachment member 30 in the thickness direction. The side opposite to the nozzle opening 42 of the liquid jet head 40 is inserted from the mounting surfaces 31A and 31B side, and the flange portion 44 protruding from the side surface of the liquid jet head 40 is attached to the mounting surfaces 31A and 31.
It was made to contact B and fixed with the screw member 45. Thereby, the same mounting surface 31A, 3
In the plurality of liquid ejecting heads 40 fixed to 1B, the liquid ejecting surfaces 46 provided with the nozzle openings 42 are aligned at the same height from the mounting surfaces 31A and 31B, and the liquid ejecting surfaces 46 are mounted on the mounting surfaces 31A.
, 31B are aligned at the same inclination angle.

Further, as shown in FIG. 5, the two attachment surfaces 31 </ b> A and 31 </ b> B to which the two head groups 41 are fixed respectively are positioned when the head attachment member 30 is positioned with respect to the support drum 10.
The two attachment surfaces 31 </ b> A and 31 </ b> B are provided to be inclined with respect to each other so as to be at a predetermined angle with respect to the support drum 10. Specifically, one attachment surface 31 </ b> A includes a center 100 on the attachment surface 31 </ b> A between adjacent head groups 41 and a rotation center 101 of the support drum 10.
A tangent line 1 having a contact point at an intersection 103 on the peripheral surface of the support drum 10 of a line segment 102 formed by connecting
It is arranged to be parallel to 04. Thereby, the distance (platen gap) between the liquid ejecting surfaces 46 of the liquid ejecting heads 40 constituting the head groups 41 adjacent to each other provided on the same mounting surface 31A or 31B and the peripheral surface of the support drum 10 is equalized. can do. That is, the distance between the liquid ejecting surface 46 of the liquid ejecting head 40 of one head group 41 and the tangent 104 is the same as the distance between the liquid ejecting surface 46 of the liquid ejecting head 40 of the other head group 41 and the tangent 104. Become. Accordingly, the distance W1 between the liquid ejecting surface 46 of the liquid ejecting head 40 of one head group 41 and the surface of the support drum 10, and the surface of the liquid ejecting surface 46 of the liquid ejecting head 40 of the other head group 41 and the surface of the supporting drum 10. The distance W2 is the same distance. Incidentally, the distances W1 and W2 between the liquid ejecting surface 46 of the liquid ejecting head 40 and the surface of the support drum 10 are flight distances until the liquid is ejected from the liquid ejecting surface 46 and landed on the ejection target medium S. Therefore, by equalizing the flight distance among the plurality of head groups 41, it is possible to suppress landing position deviation and improve print quality.

The center 10 on the mounting surface 31A between the head groups 41 adjacent to each other here.
0 is the second direction (rotation direction R) with reference to the nozzle row 43 of the two head groups 41.
) At the center (midpoint). For example, each liquid ejecting head 4 as in this embodiment.
When there is only one nozzle row 43 in 0, the center may be the center of the nozzle row 43 of the liquid jet heads 40 adjacent in the rotation direction R. For example, when two or more nozzle rows 43 are provided in each liquid ejecting head 40, the center point on the attachment surface 31A between the rows of the nozzle rows closest to each other may be set as the center 100. Further, although it is not preferable to use liquid ejecting heads with different distances between nozzle rows, for example, when liquid ejecting heads with different distances between nozzle rows are used for each head group, or nozzle rows for each head group When using different numbers of liquid ejecting heads, the center point between the center positions of the plurality of nozzle rows of the adjacent liquid ejecting heads is centered on the center position of the plurality of nozzle rows in one liquid ejecting head. 100 may be used. This is the distance from the nozzle opening 42 to the surface of the support drum 10 (
This is because the flight distance is specified so as to be closest to uniformization.

Further, the distances W1, W between the liquid ejecting surface 46 of the liquid ejecting head 40 and the surface of the support drum 10 are as follows.
2 is substantially the nozzle opening 42 in the direction perpendicular to the liquid ejection surface 46 and the support drum 10.
It is the circumference and distance. This is because each liquid ejecting head 40 is fixed to the head mounting member 30 so that the liquid ejecting surface 46 has the same angle (so as to be parallel) with the mounting surfaces 31A and 31A.

Then, the mounting surfaces 31A and 31B having two different inclination angles are provided on one head mounting member 30, and the liquid ejecting head 40 is fixed to each of the mounting surfaces 31A and 31B to constitute the liquid ejecting head unit 20. By simply positioning the head mounting member 30 with respect to the support drum 10, the distance to the support drum 10 of the plurality of liquid jet heads 40 fixed to the mounting surfaces 31A and 31B, the inclination angle (liquid jet direction), and Can be positioned. Therefore, the liquid jet heads 40 (head groups 41) fixed to the mounting surfaces 31A and 31B.
) Are not required to be individually positioned, and relative positioning can be easily performed with high accuracy.

The two attachment surfaces 31A and 31B described above have the same width along the first direction (axial direction). Thereby, the two attachment surfaces 31A are arranged by arranging the boundary line 105 between the two attachment surfaces 31A and 31B so as to be parallel to the axial direction (first direction) of the support drum 10.
, 31B can be arranged to be parallel to the axial direction (first direction) of the surface of the support drum 10.

Further, the surface of the head mounting member 30 opposite to the mounting surfaces 31A and 31B is a flat surface 33 in this embodiment. The flat surface 33 is provided at the same angle with respect to the two attachment surfaces 31A and 31B. That is, the attachment surfaces 31A, 31 with respect to the flat surface 33.
The angle of B is the same. Thereby, when positioning the head attachment member 30 (liquid ejecting head unit 20) with respect to the support drum 10, the angle can be adjusted with respect to the support drum 10 with reference to the flat surface 33 of the head attachment member 30. The positioning operation of the liquid jet head unit 20 is facilitated.

Further, the liquid jet head 40 fixed to each of these two mounting surfaces 31A and 31B.
Alternatively, different types of liquid may be supplied to each of the attachment surfaces 31A and 31B, or the same type of liquid may be supplied. For example, when supplying the same kind of liquid to the liquid jet heads 40 on the two mounting surfaces 31A and 31B, for example, the liquid jet head 40 on one mounting surface 31A and the liquid jet head 40 on the other mounting surface 31B. In the first direction (
The resolution can be doubled by shifting the nozzle openings 42 adjacent to each other in the axial direction of the rotary shaft 12 by half (half the pitch). Here, high-precision positioning in which the nozzle openings 42 are shifted by a half pitch results in poor printing unless the liquid jet heads 40 fixed to the two mounting surfaces 31A and 31B are positioned with relatively high accuracy. End up. In the present embodiment, two mounting surfaces 31A and 31B are provided on one head mounting member 30, and the relative positioning of the liquid jet heads 40 fixed to the two mounting surfaces 31A and 31B is high on the same member. Since it can be performed with high accuracy, the same type of liquid is ejected from the liquid ejecting heads 40 fixed to the two mounting surfaces 31A and 31B, and the resolution of these liquid ejecting heads 40 is doubled. Positioning can be performed easily. Incidentally, a plurality of head mounting members having only one mounting surface are prepared, and these head mounting members are positioned with high accuracy with respect to the support drum 10 so as to be shifted by a half pitch of the nozzle openings 42. This is difficult and may cause a decrease in print quality. Even when the same type of liquid is ejected from the liquid ejecting heads 40 fixed to the two mounting surfaces 31A and 31B, each mounting surface 31 is used.
The liquid ejecting heads A and 31B may be provided so as to be in the same position in the second direction without being shifted by the half pitch of the nozzle openings 42 in the first direction. In this case, although the resolution is not doubled, high-speed printing is possible.

Here, a method of assembling such a liquid ejecting apparatus 1, particularly the liquid ejecting head unit 20
A method of positioning the drum 10 and the support drum 10 will be described. FIG. 6 is a side view of the main part showing the method for manufacturing the liquid jet head unit.

As shown in FIG. 6A, the stage 60 on which the liquid ejecting head unit is placed is provided with a jig 70 that supports the head mounting member 30. The jig 70 includes a base portion 71 and a support portion 72 that is rotatably provided on the base portion 71 and supports the head mounting member 30.

In addition, a camera 80 that is an example of an imaging unit that images an alignment mark provided on the liquid ejecting head 40 is provided movably with respect to the stage 60. The camera 80 is arranged such that the optical axis L (Z axis) is perpendicular to the stage 60. The camera 80 is configured to be relatively movable in the optical axis direction and in the X-axis direction and the Y-axis direction orthogonal to the optical axis direction. In the present embodiment, the stage 60 and the jig 70 are fixed, and the camera 8 is attached to these.
0 is movable.

The alignment mark 90 is a mark provided on the liquid ejecting head 40 with the nozzle opening 42 as a reference. That is, the alignment mark 90 is provided at a predetermined relative position from the nozzle opening 42. In this embodiment, the opening is provided in the liquid ejection surface 46. By aligning the alignment marks 90 of the liquid ejecting heads 40 at predetermined positions, the nozzle openings 42 are aligned at predetermined positions. As the alignment mark 90, the nozzle opening 42 itself may be used.

First, the head attachment member 30 is attached to the support portion 72 of the jig 70 described above. At this time,
The direction of the boundary line 105 and the rotation axis of the support portion 72 are made parallel.

Next, the liquid ejecting head 40 constituting the head group 41 for each of the mounting surfaces 31A and 31B.
Align and fix. Specifically, this is performed as follows.

As shown in FIG. 6B, the liquid jet heads 40 constituting the head group 41 are arranged on the attachment surface 31A. Next, the angle of the attachment surface 31A is adjusted so that the alignment mark 90 of the liquid jet head 40 is positioned on a plane P parallel to the X-axis direction and the Y-axis direction. Here, “the alignment mark 90 is located on a plane parallel to the X-axis direction and the Y-axis direction” is not limited to the case where all the alignment marks 90 are located on the plane P, but within the depth of field of the camera 80. Including the case where the distance from the plane P in the Z-axis direction is within the range.

Specifically, the support portion 72 is rotated so that the attachment surface 31A is parallel to the plane P. As described above, the liquid ejecting surfaces 46 of the respective liquid ejecting heads 40 are aligned at the same height from the mounting surface 31A, and are aligned at the same inclination angle as the mounting surface 31A. By making them parallel, the alignment mark 90 of each liquid ejecting head 40 is positioned on the plane P.

Then, the position and focus of the camera 80 in the Z-axis direction are adjusted so that the alignment mark 90 of each liquid ejecting head 40 is positioned at the depth of field.

By adjusting the angle of the mounting surface 31A and adjusting the position and focus of the camera 80 in the Z-axis direction, the camera 80 is moved only in the X-axis direction and the Y-axis direction with respect to the mounting surface 31A. Each alignment mark 90 can be imaged.

Next, each liquid ejecting head 40 is fixed to the mounting surface 31 </ b> A so that the alignment marks 90 are in a predetermined arrangement based on an image captured by the camera 80.

Specifically, each alignment mark 90 is imaged by the camera 80, the center of the alignment mark 90 is obtained from the image obtained by image processing, and the liquid ejecting head 40 is arranged so that these centers are in a predetermined arrangement. Adjust the position. In the present embodiment, as shown in FIG. 3, the nozzle openings 42 of the nozzle rows 43 are arranged in parallel along the first direction, and the head group 41 is arranged in parallel in the second direction. The liquid jet heads 40 are arranged so that the two head groups 41 are slightly shifted in the first direction.

Next, as shown in FIG. 6C, the liquid jet head 40 is attached to the attachment surface 31B as well as the attachment surface 31A. Specifically, the angle of the attachment surface 31B is adjusted to be the same as the angle of the attachment surface 31A adjusted in FIG. By setting the mounting surface 31B to such an angle, the alignment marks 90 on the mounting surface 31B are also positioned on the plane P, and each camera 80 is in focus only by moving the camera 80 in the X-axis and Y-axis directions. The alignment mark 90 can be imaged.

In this way, at the stage of FIG. 6B, once the position and focus of the camera 80 in the Z-axis direction are adjusted for one mounting surface 31A, the position of the camera 80 in the Z-axis direction for the other mounting surface 31B. There is no need to adjust the focus. As a result, when the camera 80 moves in the Z-axis direction due to an error associated with the movement of the camera 80 in the Z-axis direction, that is, the mechanical accuracy of the camera 80 drive mechanism or the like,
It is possible to avoid an error that an image of a portion warped from the direction along the axial direction is captured.
In addition, since the alignment marks 90 are imaged for all the mounting surfaces 31A and 31B at the magnification set in the stage of FIG. 6B, an alignment error caused by imaging the alignment marks 90 at different magnifications is avoided. Can do. Since such an error can be avoided, the liquid jet head 40 can be attached to the head attachment member 30 with high accuracy.

Thereafter, also on the attachment surface 31B, each liquid jet head 40 is fixed to the attachment surface 31B so that the alignment marks 90 are in a predetermined arrangement based on an image captured by the camera 80. In this manner, the liquid ejecting head unit 20 in which the liquid ejecting head 40 is provided on the head mounting member 30 is formed.

As described above, even in the liquid ejecting head unit having the plurality of mounting surfaces 31A and 31B, the liquid ejecting head unit can be used without using a glass mask suitable for the mounting surfaces 31A and 31B having different inclined surfaces. The head 40 can be positioned. Also,
Once the position and focus of the camera 80 in the Z-axis direction are adjusted once for one mounting surface 31A, thereafter, it is not necessary to adjust the position and focus of the camera 80 in the Z-axis direction for all the mounting surfaces 31A and 31B.

Accordingly, it is possible to attach the liquid ejecting head 40 to the head mounting member 30 with high accuracy while avoiding errors associated with the movement of the camera 80 in the Z-axis direction and errors associated with zooming in / out.

In the present embodiment, the mounting surface 31 is configured to rotate around the support portion 72.
The boundary line 105 between A and the mounting surface 31B is changed from the initial position (position on the auxiliary line C) shown in FIG. 6A to the auxiliary line C as shown in FIGS. 6B and 6C. Slightly deviates left and right Accordingly, the relative positions of the liquid jet head 40 on the mounting surface 31A and the liquid jet heads 40 on the mounting surface 31B are determined in consideration of the deviation.

FIG. 7 is a side view of the main part showing the method for manufacturing the liquid ejecting apparatus.
First, as shown in FIG. 7A, the liquid ejecting head unit 20 is positioned in a direction (X direction and Y direction) intersecting the axial direction of the rotating shaft 12 of the support drum 10. At this time,
If positioning is performed with respect to the support drum 10 with reference to the boundary line 105 between the two mounting surfaces 31A and 31B, the positioning of the two mounting surfaces 31A and 31B in the X direction and the Y direction can be performed simultaneously.

Next, as shown in FIG. 7B, the angle θ of the liquid jet head unit 20 with respect to the support drum 10 is positioned. The angle θ of the liquid ejecting head unit 20 is an inclination angle centered on a direction parallel to the axial direction of the rotary shaft 12, and in this embodiment, the two attachment surfaces 31A.
Since the boundary line 105 of 31B is parallel to the axial direction of the rotating shaft 12, the inclination angle θ of the liquid jet head unit 20 around the boundary line 105 is adjusted. At this time,
The inclination angle θ of the liquid jet head unit 20 can be easily determined by defining the angle of the flat surface 33 with respect to the vertical direction. The positioning can also be performed by making the flat surface 33 horizontal or vertical with a leveling device or the like. The positions in the X and Y directions and the inclination angle θ are calculated in advance based on the position of the liquid jet head unit 20, the outer diameter of the support drum 10, the angle formed by the two mounting surfaces 31A and 31B, and the like. This can be calculated.

As described above, the plurality of mounting surfaces 31A and 31B mounted at a predetermined angle are integrally and continuously provided, and the liquid ejecting head 40 is fixed to the two mounting surfaces 31A and 31B to thereby form the liquid ejecting head unit 20. The distance between the liquid ejecting surfaces 46 of the plurality of liquid ejecting heads 40 and the support drum 10 can be made uniform simply by positioning the liquid ejecting head unit 20 on the support drum 10. The ejection head 40 can be easily positioned with high accuracy in a short time.

<Embodiment 2>
In the first embodiment, the angle of the attachment surfaces 31A and 31B of the head attachment member 30 is adjusted by turning around the support portion 72, but it turns around the boundary line 105 of the attachment surfaces 31A and 31B. You may go by. FIG. 8 is a schematic configuration diagram of an apparatus used in the method of manufacturing the liquid jet head unit according to the present embodiment. In addition, the same code | symbol is attached | subjected to the same thing as Embodiment 1, and the overlapping description is abbreviate | omitted.

As shown in the drawing, a jig 70 </ b> A that supports the head mounting member 30 is provided on the stage 60 on which the liquid jet head unit is placed. The jig 70 </ b> A includes a base portion 71 </ b> A and a support portion 72 </ b> A that is rotatably provided on the base portion 71 </ b> A via the shaft portion 73 and supports the head mounting member 30. The support portion 72A is formed in a bowl shape, and the head mounting member 30 can be accommodated therein.

A manufacturing method of the liquid jet head unit according to the present embodiment will be described with reference to FIG.
First, as shown in FIG. 9A, the head mounting member 30 is housed in the support portion 72A of the jig 70A described above so that the boundary line 105 is coaxial with the shaft portion 73.

Next, the liquid ejecting head 40 constituting the head group 41 for each of the mounting surfaces 31A and 31B.
Align and fix. Specifically, this is performed as follows.

As shown in FIG. 9B, the liquid jet heads 40 constituting the head group 41 are arranged on the attachment surface 31A. Next, the angle of the attachment surface 31A is adjusted so that the alignment mark 90 of the liquid jet head 40 is positioned on a plane P parallel to the X-axis direction and the Y-axis direction.

Specifically, the support portion 72A (FIG. 9B, (
In c), not shown) is rotated. As described above, the liquid ejecting surface 4 of each liquid ejecting head 40.
6 are aligned at the same height from the mounting surface 31A, and are aligned at the same inclination angle as the mounting surface 31A. By making the mounting surface 31A parallel to the plane P, the alignment mark of each liquid ejecting head 40 is aligned. 90 is located on the plane P.

Then, the position and focus of the camera 80 in the Z-axis direction are adjusted so that the alignment mark 90 of each liquid ejecting head is positioned at the depth of field.

By adjusting the angle of the mounting surface 31A and adjusting the position and focus of the camera 80 in the Z-axis direction, the camera 80 is moved only in the X-axis direction and the Y-axis direction. An image can be taken.

Next, each liquid ejecting head 40 is fixed to the mounting surface 31 </ b> A so that the alignment marks 90 are in a predetermined arrangement based on an image captured by the camera 80.

Specifically, each alignment mark 90 is imaged by the camera 80, the center of the alignment mark 90 is obtained from the image obtained by image processing, and the liquid ejecting head 40 is arranged so that these centers are in a predetermined arrangement. Adjust the position. In the present embodiment, as shown in FIG. 3, the nozzle openings 42 of the nozzle rows 43 are arranged in parallel along the first direction, and the head group 41 is arranged in parallel in the second direction. The liquid jet heads 40 are arranged so that the two head groups 41 are slightly shifted in the first direction.

Next, as shown in FIG. 9C, the liquid jet head 40 is attached to the attachment surface 31B as well as the attachment surface 31A. Specifically, the angle of the attachment surface 31B is adjusted to be the same as the angle of the attachment surface 31A adjusted in FIG. By setting the mounting surface 31B to such an angle, the alignment marks 90 on the mounting surface 31B are also positioned on the plane P, and each camera 80 is in focus only by moving the camera 80 in the X-axis and Y-axis directions. The alignment mark 90 can be imaged.

9B, once the position and focus of the camera 80 in the Z-axis direction are adjusted once for the one mounting surface 31A, the position of the camera 80 in the Z-axis direction for the other mounting surface 31B. There is no need to adjust the focus. As a result, when the camera 80 moves in the Z-axis direction due to an error associated with the movement of the camera 80 in the Z-axis direction, that is, the mechanical accuracy of the camera 80 drive mechanism or the like,
It is possible to avoid an error that an image of a portion warped from the direction along the axial direction is captured.
Further, since the alignment marks 90 are imaged for all the mounting surfaces 31A and 31B at the magnification set in the stage of FIG. 9B, an alignment error caused by imaging the alignment marks 90 at different magnifications is avoided. Can do. Since such an error can be avoided, the liquid jet head 40 can be attached to the head attachment member 30 with high accuracy.

In the present embodiment, since the boundary line 105 is coaxial with the shaft part 73, the position of the boundary line 105 is always constant even when the support part 72A is rotated. That is, the mounting surface 31A and the mounting surface 31B
As shown in FIG. 9, the boundary line 105 is not shifted to the left or right from the current position (position on the auxiliary line C). Accordingly, the relative positions of the liquid jet heads 40 having different mounting surfaces such as the mounting surface 31A and the mounting surface 31B can be made more accurate.

<Other embodiments>
As mentioned above, although one Embodiment of this invention was described, the basic structure of this invention is not limited to what was mentioned above.

For example, in the first and second embodiments described above, one head mounting member 30 has two mounting surfaces 31.
A and 31B are provided, and two head groups 41 are attached to each of the attachment surfaces 31A and 31B, but the number of attachment surfaces 31A and 31B is not particularly limited to this, and the attachment surfaces are 3
One or more may be provided. In this case, for example, the position and focus of the camera 80 in the Z-axis direction on the mounting surface 31A may be adjusted, and then the liquid ejecting head 40 may be positioned and fixed on all the mounting surfaces.

In the first and second embodiments described above, one liquid ejecting head unit 20 (head mounting member 30) is provided in the liquid ejecting apparatus 1. However, the present invention is not particularly limited thereto.
Two or more liquid jet head units 20 may be provided. In this case, the liquid ejecting head unit 20 may be arranged on the support drum 10 in the vertical direction, the horizontal direction, and the horizontal direction. Further, the liquid jet head unit 20 has an inclined angle such as 45 degrees with respect to the vertical direction. You may arrange so that it may become.

In the first and second embodiments, the so-called line-type liquid ejecting apparatus 1 that fixes the liquid ejecting head unit and performs printing on the ejected medium S only by the rotation of the support drum 10 is illustrated. The present invention is not limited to this, and the present invention can also be applied to a so-called serial type liquid ejecting apparatus that performs printing while moving the liquid ejecting head unit 20 in the axial direction of the rotating shaft 12 of the support drum 10.

The present invention is intended for a wide range of liquid jet heads in general, for example, for manufacturing recording heads such as various ink jet recording heads used in image recording apparatuses such as printers, and color filters such as liquid crystal displays. The present invention can also be applied to a coloring material ejecting head, an organic EL display, an electrode material ejecting head used for forming electrodes such as an FED (field emission display), a bioorganic matter ejecting head used for biochip manufacturing, and the like.

DESCRIPTION OF SYMBOLS 1 Liquid ejecting apparatus, 10 Support drum, 12 Rotating shaft, 20 Liquid ejecting head unit, 30 Head mounting member, 31A, 31B Mounting surface, 40 Liquid ejecting head, 41 Head group, 42 Nozzle opening, 46 Liquid ejecting surface, 80 Camera (Imaging means)

Claims (3)

A method of manufacturing a liquid ejecting head unit having a plurality of mounting surfaces that are arranged to face a support drum that supports an ejected medium and rotates about an axis, and to which a plurality of head groups each composed of a plurality of liquid ejecting heads are attached. And
Using an imaging unit that moves in the X-axis and Y-axis directions orthogonal to the optical axis and images an alignment mark that is provided in the liquid ejecting head and is based on a nozzle opening that discharges droplets.
Adjusting the angle of the mounting surface with respect to the imaging means so that the alignment mark of the liquid jet head arranged on the one mounting surface is positioned on a plane parallel to the X axis and the Y axis;
For each of the mounting surfaces, the mounting surface is adjusted to the angle, and the liquid ejecting head is fixed to the mounting surface so that the alignment marks are in a predetermined arrangement based on an image captured by the imaging unit. A method of manufacturing a liquid jet head unit. A method of manufacturing a liquid jet head unit according to claim 1,
The attachment surface has a contact point at an intersection point on the peripheral surface of the support drum connecting the center of the attachment surface between the head groups attached to the attachment surface and the center of the support drum. Arranged to be parallel to the tangent,
The plurality of mounting surfaces are formed integrally and continuously,
A method of manufacturing a liquid ejecting head unit, wherein an angle of the mounting surface with respect to the imaging unit is adjusted with a boundary line of the plurality of mounting surfaces as an axis. A method of manufacturing a liquid ejecting apparatus, comprising: a support drum that supports an ejected medium and rotates about an axis; and a liquid ejecting head unit having a plurality of mounting surfaces to which a plurality of head groups each composed of a plurality of liquid ejecting heads are attached. There,
Using an imaging unit that moves in the X-axis and Y-axis directions orthogonal to the optical axis and images an alignment mark that is provided in the liquid ejecting head and is based on a nozzle opening that discharges droplets.
Adjusting the angle of the mounting surface with respect to the imaging means so that the alignment mark of the liquid jet head arranged on the one mounting surface is positioned on a plane parallel to the X axis and the Y axis;
For each of the mounting surfaces, the mounting surface is adjusted to the angle, and the liquid ejecting head is fixed to the mounting surface so that the alignment marks are in a predetermined arrangement based on an image captured by the imaging unit. Forming a liquid jet head unit,
The method of manufacturing a liquid ejecting apparatus, wherein the liquid ejecting head unit is arranged such that a boundary line between the mounting surfaces adjacent to each other is parallel to an axial direction of a rotation shaft of the support drum.

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