JP2008279694A - Assembling method for head unit and assembling apparatus for head unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an assembling method for a head unit which can suppress a positional deviation of adjoining inkjet heads, and to provide an assembling apparatus for the head unit. <P>SOLUTION: The head unit 2 is comprised of a carriage plate 4 and a plurality of the inkjet heads 3 attached to the carriage plate 4. In the assembling method for the head unit 2, attachment working of the plurality of inkjet heads 3 to the carriage plate 4 is carried out one by one by alignment and fixed procedures. At the same time, alignment of each of the second and after inkjet heads 3 is carried out on the basis of an adjoining inkjet head 3 complete with attachment working. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a head unit assembling method and a head unit assembling apparatus for assembling a plurality of inkjet heads to a carriage.

Conventionally, as a method of assembling this type of head unit, a method is known in which a plurality of ink jet heads are positioned and fixed with respect to a carriage (see Patent Document 1). In this head unit assembly method, a head unit in which all inkjet heads are temporarily fixed to a carriage is introduced into an assembly apparatus, and in the assembly apparatus, all inkjet heads are positioned, and these inkjet heads are temporarily fixed with an adhesive. From here, it is fixed by screw tightening.
JP 2001-162892 A

  However, in the conventional head unit assembling method, the rotational force of the screw acts on the ink jet head with the main fixing by screw tightening, and the nozzle rows of the adjacent ink jet heads may be displaced from each other. That is, in the main fixing after positioning, if the adjacent inkjet heads are slightly rotated to the right by screw tightening, a positional shift occurs synergistically, and the rightmost nozzle of one inkjet head and the other inkjet head The position of the leftmost nozzle is greatly displaced. In particular, the nozzle rows of adjacent inkjet heads may form one drawing line or perform overstrike, which greatly affects the drawing quality.

  It is an object of the present invention to provide a head unit assembling method and a head unit assembling apparatus that can suppress positional deviation between adjacent ink jet heads.

  The head unit assembling method of the present invention is a method of assembling a head unit comprising a carriage plate and a plurality of ink jet heads assembled to the carriage plate. It is characterized in that it is performed one by one in a fixing procedure, and the alignment of each of the second and subsequent inkjet heads is performed with reference to one adjacent inkjet head after the assembly operation is completed.

  The head unit assembling apparatus according to the present invention is a head unit assembling apparatus comprising a carriage plate and a plurality of ink jet heads assembled to the carriage plate. Based on the recognition result, alignment means for aligning each inkjet head, head fixing means for fixing each inkjet head after alignment to the carriage plate, control means for controlling the image recognition means, alignment means, and head fixing means, The control means causes the plurality of inkjet heads to be assembled to the carriage plate one by one in the alignment and fixing procedure based on position recognition, and the alignment of the second and subsequent inkjet heads is performed. The first ink jet head and adjacent to the assembly operation is completed, characterized in that to perform as a reference.

  According to these configurations, since the alignment of each of the second and subsequent inkjet heads is performed with reference to the adjacent inkjet head that is the one inkjet head that has been assembled, the positional shift between the adjacent inkjet heads is performed. It can be suppressed as much as possible. In other words, since the inkjet head adjacent to the inkjet head that has been aligned and fixed is aligned as a reference, there is no possibility that the reference inkjet head is misaligned, and misalignment between adjacent inkjet heads is possible. The sex can be halved. Thereby, since the positional deviation between adjacent nozzle rows is suppressed, the drawing quality is not affected even if the separated nozzle rows are relatively displaced.

  In this case, it is preferable that the alignment of the first inkjet head is performed with reference to the mark formed on the carriage plate.

  According to this configuration, the alignment of the first inkjet head can be accurately aligned with respect to the carriage plate.

  In these cases, the alignment of the second and subsequent inkjet heads is preferably performed with reference to the two outermost nozzles in the nozzle row of the inkjet head.

  According to this configuration, it is possible to accurately perform the alignment in the θ direction, which is particularly difficult to cope with data correction, and to suppress the positional deviation between the two nozzles of the adjacent inkjet head as much as possible.

  In these cases, the fixing of each inkjet head to the carriage plate is preferably composed of temporary fixing with an adhesive and permanent fixing with screws.

  According to this configuration, it is not necessary to hold the inkjet head immovably by some means between the temporary fixing and the final fixing, and the apparatus configuration can be simplified. In this case, it is preferable to use an instantaneous adhesive from the viewpoint of efficient assembly of the head unit.

  Hereinafter, with reference to the accompanying drawings, a head unit assembly apparatus (hereinafter referred to as an “assembly apparatus”) including an inkjet head alignment apparatus (hereinafter referred to as an “alignment apparatus”) according to an embodiment of the present invention. .). This assembly apparatus is an assembly apparatus for a head unit including an inkjet head and a carriage plate on which the inkjet head is mounted, and aligns and fixes an assembly operation of a plurality of inkjet heads to a carriage plate via an alignment jig. This is performed one by one in the procedure. In the present embodiment, for simplicity of explanation, a case where three inkjet heads are assembled to a carriage plate will be described as an example.

  First, the head unit 2 which is an assembly target of the assembly apparatus will be described with reference to FIG. As shown in the figure, the head unit 2 includes three ink jet heads 3 and a carriage plate 4 on which these ink jet heads 3 are mounted.

  The ink jet head 3 is provided in a rectangular box-shaped ink introduction part 5 having an ink introduction port together with a head substrate, a square box-like head main body 7 having a nozzle surface 6, and a boundary portion between the ink introduction part 5 and the head main body 7. And a rectangular flange-shaped fixing portion 8 fixed to the carriage plate 4. When the ink jet head 3 is assembled to the carriage plate 4, the carriage plate 4 and the ink jet head 3 are turned upside down, and the ink jet head 3 is attached to the carriage plate 4 from above with the ink introduction part 5 facing down. Work.

  The fixing portion 8 has four screw insertion holes 9 formed at four corners, and four adhesive injection ports 10 provided in the vicinity of each screw insertion hole 9. An adhesive for temporarily fixing the inkjet head 3 to the carriage plate 4 is injected into each adhesive injection port 10, and the screw insertion hole 9 is screwed into a screw hole 14 of the carriage plate 4 described later. A fixing screw 17 for fixing is inserted. In this case, the screw insertion hole 9 is a so-called fool hole, and the inkjet head 3 is aligned within the range of a gap formed between the screw insertion hole 9 and the fixing screw 17. An alignment jig 32 (described later) is attached to the long side and the short side of the fixed portion 8 to align the inkjet head 3 (details will be described later).

  On the nozzle surface 6 of the head body 7, two nozzle rows 11 and 11 are arranged in parallel with each other and in parallel with the extending direction (long side direction) of the carriage plate 4. It consists of a number of nozzles 12 arranged at equal pitches. Since the positional accuracy of the two nozzle arrays 11 and 11 is guaranteed at the manufacturing stage, the outermost two nozzles 12 a and 12 a are set as reference positions in the alignment of the inkjet head 3. Each inkjet head 3 is positioned in the X, Y, and θ directions with reference to the two nozzles 12a and 12a (details will be described later). In this case, a mark serving as a reference position may be provided in the vicinity of the two outermost nozzles 12a and 12a of one nozzle row 11.

  The carriage plate 4 is formed in a horizontally long plate shape in the long side direction, and three mounting openings 13 for mounting the three inkjet heads 3 are provided at equal intervals in the long side direction. Each mounting opening 13 is formed to be slightly larger than the ink introduction portion 5 that is loosely inserted into the mounting opening 13, and allows minute movement of the inkjet head 3 during alignment. Four screw holes 14 corresponding to the screw insertion holes 9 are provided at the opening edge of each mounting opening 13, and each screw hole 14 has a fixing screw penetrating the screw insertion hole 9. 17 is screwed together. In the following description, the long side direction of the carriage plate 4 is the X-axis direction, and the short side direction orthogonal to the long side direction is the Y-axis direction.

  As shown in FIG. 2, the assembling apparatus 1 includes an alignment apparatus 21 that performs alignment of a plurality of inkjet heads 3, a fixing apparatus 22 that temporarily fixes and permanently fixes the inkjet head 3 that has been aligned by the alignment apparatus 21, and alignment. A moving device 23 for moving the head unit 2 to an alignment position by the device 21 and a control device 24 for controlling the alignment device 21 and the fixing device 22 are provided. In the assembling apparatus 1, the head unit 2 is brought to the alignment position by the moving device 23, alignment is performed by the alignment device 21, and the inkjet head 3 after alignment is fixed to the carriage plate 4 by the fixing device 22.

  As shown in FIGS. 2 and 3, the alignment device 21 includes an image recognition camera (image recognition unit) 31 that recognizes the nozzles 12 of the inkjet head 3 from the upper side of the carriage plate 4, and the inkjet head 3 to be aligned. The attached alignment jig 32, the X axis adjustment unit 33 for moving and adjusting the inkjet head 3 in the X direction through the alignment jig 32, and the inkjet head 3 in the Y and θ directions through the alignment jig 32 The Y-axis adjusting unit 34 that adjusts the angle and a machine base (not shown) that supports these components are configured. In this alignment apparatus 21, the first inkjet head 3 is aligned with reference to the mark formed on the carriage plate 4, and the alignment of the second and subsequent inkjet heads 3 is completed after the assembly operation is completed and adjacent 1 The two nozzles 12a and 12a at the outermost end of the inkjet head 3 are used as a reference.

  The image recognition camera 31 is composed of a pair of CCD or CMOS cameras fixedly provided above the inkjet head 3, and simultaneously images the two outermost nozzles 12a, 12a of the inkjet head 3 (see FIG. 2 (b)). A mark serving as a reference for alignment or an imaging result of the two nozzles 12a and 12a is displayed as a positioning point on the display of the control device 24 after image processing. At this point, an imaging result of the two nozzles 12a and 12a serving as an alignment target is displayed. Are overlaid. That is, alignment is performed by moving the inkjet head 3 and aligning the two nozzles 12 and 12 with the positioning points.

  The alignment jig 32 is an adjustment jig that is used while being attached to the side surface of the fixed portion 8 of the inkjet head 3, and an X-axis piece 41 that is attached to one side of the fixed portion 8 in the X-axis direction, and the fixed portion 8 and a Y-axis piece 42 that is in contact with one side in the Y-axis direction, and is formed in an “L” shape in plan view (see FIG. 3A). The X-axis piece 41 has an X-axis contact surface 43 that is in contact with the end surface of the fixed portion 8 and an X-axis placement surface 44 that is mounted on the edge of the fixed portion 8 and is formed in an inverted “L” shape in cross section. (See FIG. 3B). Further, the outside of the X-axis piece 41 is an X-axis contact surface (mover contact surface) 45 against which a first Y-axis mover 71 and a second Y-axis mover 72 described later are abutted.

  Similarly, the Y-axis piece 42 has a Y-axis contact surface 46 that contacts the end surface of the fixed portion 8, and a Y-axis placement surface 47 that rests on the edge of the fixed portion 8. It is formed in a shape. Further, the outer side of the Y-axis piece 42 is a Y-axis contact surface (mover contact surface) 48 against which an X-axis mover 51 described later is abutted. In this case, the X-axis contact surface 43 and the Y-axis contact surface 46 have a high-accuracy squareness, and the X-axis contact surface 43 and the Y-axis contact surface 46 have high-precision flatness, respectively. have. Similarly, the X-axis contact surface 45 and the Y-axis contact surface 48 have a high-accuracy squareness, and the X-axis contact surface 45 and the Y-axis contact surface 48 each have a high-accuracy flatness. Yes. The alignment jig 32 configured in this manner abuts the X-axis contact surface 43 and the Y-axis contact surface 46 against the fixed portion 8, and the X-axis placement surface 44 and the Y-axis placement surface 47 8 to be used.

  The X-axis adjustment unit 33 includes one X-axis moving element 51 that contacts the Y-axis piece 42 of the alignment jig 32, an X-axis moving mechanism 52 that operates (moves) the X-axis moving element 51 in the X-axis direction, An X-axis biasing mechanism 53 that is provided on the opposite side of the X-axis moving element 51 with the inkjet head 3 interposed therebetween and biases the inkjet head 3 toward the X-axis moving element 51 in the X-axis direction. (See FIG. 2).

  As shown in FIG. 4, the X-axis moving element 51 is formed in a round bar shape, and is held by the X-axis moving mechanism 52 on the base end side. The tip of the X-axis moving element 51 is formed in a hemispherical shape and is in point contact with the alignment jig 32.

  The X-axis moving mechanism 52 includes an X-axis slide block 55 that holds the X-axis slider 51, an X-axis actuator 56 that operates the X-axis slide block 55 in the X-axis direction, and a slide of the X-axis slide block in the X-axis direction. And an X-axis base 57 on which the X-axis actuator 56 is mounted. The X-axis actuator 56 is composed of a stepping motor or the like, and a male screw 58 is threaded on the main shaft. On the other hand, on the X-axis actuator 56 side of the X-axis slide block 55, a female screw member 59 into which the male screw 58 is screwed is projected. When the X-axis actuator 56 rotates forward and backward, the male screw 58 of the main shaft rotates forward and backward, and the X-axis slide block 55 advances and retreats via the female screw member 59. As a result, the X-axis moving element 51 moves back and forth slightly in the X-axis direction. The X-axis base 57 is disposed on a common base 60 together with a support base 86 of a Y-axis moving mechanism 73, which will be described later. The common base 60 is supported by the above machine base, and is in an overhanging state. It faces unit 2 (see FIG. 2).

  The X-axis biasing mechanism 53 includes an X-axis biasing base 61, an X-axis spring support member 62 protruding from the X-axis biasing base 61, an X-axis compression spring 63 attached to the X-axis spring support member 62, An X-axis abutting plate 64 connected to the tip of the X-axis compression spring 63 and abutted against the inkjet head 3. The X-axis compression spring 63 urges the inkjet head 3 (the fixed portion 8 thereof) in the X-axis direction toward the X-axis moving element 51 via the X-axis abutting plate 64. As a result, the urging force of the X-axis urging mechanism 53 and the pressing force of the X-axis moving mechanism 52 antagonize each other with the ink-jet head 3 interposed therebetween, and the ink-jet head 3 is moved in the X-axis with the advance / retreat operation of the X-axis moving element 51 It is designed to move forward and backward positively (alignment). The X-axis urging mechanism 53 is disposed on a common urging base 76 together with a Y-axis urging mechanism 74 described later. The common urging base 76 is supported by the above-mentioned machine base and is overhanging. It faces the head unit 2 in a state (see FIG. 2).

  As shown in FIG. 5, the Y-axis adjustment unit 34 includes a first Y-axis mover 71 and a second Y-axis mover 72 that are provided apart from each other in the X-axis direction, and a first Y-axis mover 71 and a second Y-axis. A Y-axis moving mechanism 73 that operates (moves) the shaft moving element 72 individually and simultaneously, and a Y-axis urging provided on the opposite side of the first Y-axis moving element 71 and the second Y-axis moving element 72 across the inkjet head 3 And a mechanism 74. The first Y-axis mover 71 and the second Y-axis mover 72 are each formed in a round bar shape, like the X-axis mover 51, and the tips of both movers 71 and 72 are formed in a hemispherical shape. Each tool 32 is in point contact.

  The Y-axis moving mechanism 73 includes a first slide block 81 that holds the first Y-axis mover 71, a holding block 82 that holds the second Y-axis mover 72, and a first slide block 81 that operates the first slide block 81 in the Y-axis direction. The first actuator 83 and the holding block 82 are mounted, and the moving stage 84 for mounting the first slide block 81 slidably in the Y-axis direction, the second actuator 85 for moving the moving stage 84 in the Y-axis direction, and movement And a support base 86 that supports the stage 84 movably in the Y-axis direction.

  The first actuator 83 is composed of a stepping motor or the like, and a male screw 87 is threaded on its main shaft. On the other hand, on the first actuator 83 side of the first slide block 81, a female screw member 88 into which the male screw 87 is screwed is projected. When the first actuator 83 rotates forward and backward, the male screw 87 of the main shaft rotates forward and backward, and the first slide block 81 moves forward and backward via the female screw member 88. As a result, the first Y-axis moving element 71 moves back and forth slightly in the Y-axis direction. That is, by driving the first actuator 83, only the first Y-axis moving element 71 advances and retreats in the Y-axis direction, and the inkjet head 3 is angularly rotated in the θ direction via the alignment jig 32.

  The second actuator 85 is composed of a stepping motor or the like, and a male screw 89 is threaded on the main shaft thereof. On the other hand, on the second actuator 85 side of the moving stage 84, a female screw member 90 into which the male screw 89 is screwed is provided. When the second actuator 85 rotates forward and backward, the male screw 89 of the main shaft rotates forward and backward, and the moving stage 84 advances and retreats via the female screw member 90. As a result, the first Y-axis mover 71 and the second Y-axis mover 72 simultaneously advance and retract slightly in the Y-axis direction. That is, by driving the second actuator 85, the first Y-axis moving element 71 and the second Y-axis moving element 72 are translated in the Y-axis direction, and the inkjet head 3 is moved in the Y-axis direction via the alignment jig 32.

  The Y-axis biasing mechanism 74 includes a Y-axis biasing base 91, a Y-axis spring support member 92 protruding from the Y-axis biasing base 91, a Y-axis compression spring 93 attached to the Y-axis spring support member 92, A Y-axis abutting plate 94 which is connected to the tip of the Y-axis compression spring 93 and abuts against the inkjet head 3. The Y-axis compression spring 93 urges the inkjet head 3 (the fixed portion 8 thereof) in the Y-axis direction toward both the Y-axis moving elements 71 and 72 via the Y-axis abutting plate 94. As a result, the urging force of the Y-axis urging mechanism 74 and the pressing force of the Y-axis moving mechanism 73 antagonize each other with the ink-jet head 3 interposed therebetween, and the ink-jet head 3 is moved along with the advance / retreat operation of each Y-axis mover 71, 72. Are moved forward and backward positively in the Y-axis direction (alignment).

  The alignment of the inkjet head 3 by the alignment device 21 configured as described above is performed by causing the X-axis adjustment unit 33, the Y-axis adjustment unit 34, and the alignment jig 32 to cooperate based on the imaging result of the image recognition camera 31. This is done by moving and adjusting the inkjet head 3 in the X, Y, and θ directions. For example, when the two outermost nozzles 12b and 12b serving as the alignment reference are at the positions shown in FIG. 6A based on the imaging result of the image recognition camera 31, the X-axis moving element 51 is moved forward and backward. The 1Y-axis moving element 71 and the second Y-axis moving element 72 are moved back and forth so that the outermost two nozzles 12c and 12c of the target inkjet head 3 are aligned with the positions of the two reference nozzles 12b and 12b. In this way, the inkjet head 3 is moved and adjusted (see FIG. 6B). In this case, since the moving element contact surfaces 45 and 48 with which the three moving elements 51, 71 and 72 are in contact with each other have a high degree of flatness, the movement adjustment is started from any of the X, Y and θ directions. Even if the alignment jig 32 is slid, the knuckles do not occur in the direction in which the adjustment has been completed. Thereby, alignment work can be performed efficiently.

  As shown in FIG. 2, the moving device 23 that moves the head unit 2 includes a set table 101 on which the carriage plate 4 is placed in a positioned state, and a moving support base 102 that supports the set table 101 movably in the X-axis direction. And a motor (not shown) for moving the set table 101 in the X-axis direction via a lead screw. The set table 101 is formed in a rectangular frame shape that is slightly larger than the carriage plate 4 and has a structure that does not interfere with the ink introduction portion 5 of the inkjet head 3 protruding downward. Then, by driving the motor, the carriage plate 4 set via the set table 101 is moved to a desired alignment position, and alignment and fixing operations are performed.

  The fixing device 22 fixes the inkjet head 3 that has been aligned to the carriage plate 4. The fixing unit 22 includes a syringe unit 105 that injects an adhesive into the adhesive injection port 10 and a fixing screw 17. And a screw tightening unit 106 that fastens to the screw hole 14 via 9. The aligned inkjet head 3 is temporarily fixed by injecting an adhesive into the adhesive injection port 10 by the syringe unit 105. The inkjet head 3 is finally fixed by fastening the fixing screw 17 by the screw tightening unit 106 after the adhesive is cured (see FIG. 7). Note that an instantaneous adhesive is preferably used as the adhesive from the viewpoint of efficient assembly of the head unit 2.

  The main part of the control device 24 is constituted by a CPU, a ROM, a RAM, and the like, and the X-axis adjustment unit 33, the Y-axis adjustment unit 34, and the image recognition camera 31 move the inkjet head 3 in the X, Y, and θ directions (alignment). Operation) and a fixing operation by the fixing device 22 are controlled (see FIG. 2B).

  Next, a series of operations from alignment to fixing of the inkjet head 3 will be described with reference to FIG. In this embodiment, the assembly of the inkjet head 3 to the carriage plate 4 will be described as being performed one by one in the alignment and fixing procedure from the left part.

  First, the first inkjet head 3 is inserted into the mounting opening 13 on the left side of the carriage plate 4 (see FIG. 7A), the image recognition camera 31, the X-axis adjustment unit 33, the Y-axis adjustment unit 34, and the alignment. By aligning the jig 32, alignment is performed with reference to a mark formed on the first carriage plate 4 or an alignment mask (not shown). Next, the first inkjet head 3 that has been aligned is temporarily fixed by injecting an adhesive into each adhesive inlet 10 by the fixing device 22 (see FIG. 7B), and each screw. The fixing screws 17 are tightened in the holes 14 to be permanently fixed (see FIG. 7C).

  Next, after the head unit 2 is moved by the moving device 23, the second inkjet head 3 is put into the mounting opening 13 at the center of the carriage plate 4. Subsequently, the image recognition camera 31 images the two outermost nozzles 12a and 12a of the first inkjet head 3 that has been fixed (see FIG. 7D). Then, with the two outermost nozzles 12a and 12a as a reference, the outermost end of the second inkjet head 3 is obtained by the X-axis adjustment unit 33, the Y-axis adjustment unit 34, and the alignment jig 32 in the same manner as described above. The two nozzles 12b and 12b are combined. After the alignment is completed, the fixing device 22 temporarily fixes and permanently fixes the second inkjet head 3 in the same manner as described above. The third inkjet head 3 is also aligned and fixed in the same manner as described above with reference to the two outermost nozzles 12b and 12b of the second inkjet head 3 that has been fixed.

  As described above, according to the present embodiment, since the inkjet head 3 adjacent to the inkjet head 3 that has been aligned and fixed is used as a reference, the reference inkjet head 3 may be misaligned. The possibility of misalignment between the adjacent inkjet heads 3 can be halved. Thereby, since the positional deviation between the adjacent nozzle rows 11 is suppressed, the drawing quality is not affected even if the separated nozzle rows 11 are relatively displaced.

  Next, an assembly apparatus 1 according to the second embodiment will be described with reference to FIG. In the assembling apparatus 1 according to the present embodiment, only the X-axis moving element 51, the first Y-axis moving element 71, and the second Y-axis moving element 72 constituting the alignment apparatus 21 are integrally connected to the alignment jig 32. However, this is different from the configuration of the first embodiment. That is, the X-axis moving element 51 is connected to the Y-axis piece 42 of the alignment jig 32 so as to be movable in the Y-axis direction, and the first Y-axis moving element 71 and the second Y-axis moving element 72 are X with respect to the X-axis piece 41. It is connected so as to be movable in the axial direction. For example, the connecting member 111 is fixed to the lower side of the X-axis moving element 51 (the first Y-axis moving element 71 and the second Y-axis moving element 72 are the same), and the slider 112 provided at the tip of the connecting member 111 is The dovetail groove 113 formed on the lower surface of the alignment jig 32 is slidably engaged.

  Thereby, the alignment jig 32 can be easily handled without impairing the functions of the three moving elements 51, 71, 72. In particular, when a plurality of inkjet heads 3 are fixed, the three moving elements 51, 71, 72 and the alignment jig 32 are maintained in a state where the alignment is completed and faced to the next inkjet target 3 to be aligned. Therefore, alignment work can be performed efficiently.

  The X-axis moving mechanism 52 and the Y-axis moving mechanism 73 may be configured by a micro head or the like and operated manually. Further, the first Y-axis mover 71 and the second Y-axis mover 72 may be individually operated.

It is an external appearance perspective view of a head unit. (A) is the plane schematic diagram of the assembly apparatus which concerns on embodiment of this invention, (b) is the schematic diagram which looked at the assembly apparatus from the side. (A) is a schematic plan view around the alignment jig, and (b) is a schematic view of the alignment jig viewed from the side. (A) is the plane schematic diagram of an X-axis movement mechanism, (b) is the schematic diagram which looked at the X-axis movement mechanism from the side surface. (A) is the plane schematic diagram of a Y-axis movement mechanism, (b) is the schematic diagram which looked at the Y-axis movement mechanism from the side surface. It is a schematic diagram for demonstrating the alignment operation | movement of an alignment apparatus. It is a figure for demonstrating a series of operation | movement from alignment of an inkjet head to fixation. It is the mimetic diagram which looked at the mover and alignment jig concerning a 2nd embodiment from the side.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Assembling apparatus 3 ... Inkjet head 4 ... Carriage plate 11 ... Nozzle row 12 ... Nozzle 21 ... Alignment means 22 ... Fixing means 24 ... Control means

Claims (5)

In a method of assembling a head unit comprising a carriage plate and a plurality of inkjet heads assembled to the carriage plate,
The assembly operation of the plurality of inkjet heads to the carriage plate is performed one by one in the alignment and fixing procedures,
A method of assembling a head unit, wherein the alignment of each of the second and subsequent inkjet heads is performed with reference to one of the adjacent inkjet heads when the assembly operation is completed.   The head unit assembling method according to claim 1, wherein the alignment of the first inkjet head is performed with reference to a mark formed on the carriage plate.   3. The head unit assembling method according to claim 1, wherein the alignment of the second and subsequent inkjet heads is performed with reference to two outermost nozzles in a nozzle row of the inkjet head. 4. .   4. The method of assembling a head unit according to claim 1, wherein the fixing of the ink jet heads to the carriage plate includes temporary fixing with an adhesive and permanent fixing with screws. In an assembly apparatus for a head unit comprising a carriage plate and a plurality of inkjet heads assembled to the carriage plate,
Image recognition means for recognizing the position of each inkjet head;
Alignment means for aligning each of the inkjet heads based on the recognition result of the image recognition means;
Head fixing means for fixing each inkjet head after alignment to the carriage plate;
Control means for controlling the image recognition means, alignment means and head fixing means,
The control means causes the plurality of inkjet heads to be assembled to the carriage plate one by one in an alignment and fixing procedure based on the position recognition,
An assembly apparatus for a head unit, wherein the alignment of each of the second and subsequent inkjet heads is performed with reference to the adjacent one of the inkjet heads when the assembly operation is completed.

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