JP2011194773A - Alignment tool for inkjet head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an alignment tool for an inkjet head accurately attaching an attachment piece for positioning the inkjet head to a head plate by a simple configuration.SOLUTION: The alignment tool for an inkjet head includes a base plate 81 for setting the inkjet head 1 temporarily attached with the attachment piece 21, an adjustment bar 83 securing the attachment piece 21 in an intermediate part in a first direction, a first micrometer head 91 securing the adjustment bar 83 with a minute gap and minutely reciprocating the adjustment bar 83 in the first direction via a first push-pull member 94 supported slidably in the first direction on the base plate 81, and a second micrometer head 92 and a third micrometer head 93 securing the adjustment bar 83 with a minute gap and minutely reciprocating the adjustment bar 83 in a second direction via a second push-pull member 95 and a third push-pull member 96 supported slidably in the second direction on the base plate 81.

Description

  The present invention relates to an alignment jig for an inkjet head in which an attachment piece for positioning the inkjet head on a head plate is assembled to a flange portion of the inkjet head.

Conventionally, an X-axis moving element and a Y-axis moving element that linearly advance and retreat in the X-axis direction and the Y-axis direction, respectively, and an X-axis biasing mechanism provided on the opposite side of each of the X-axis moving element and the Y-axis moving element And an Y-axis urging mechanism and an “L” -shaped L-shaped jig with which the tips of both moving elements abut, and the inkjet head set on the L-shaped jig is positioned on the carriage plate by both moving elements. An alignment device (jig) for adjusting (positioning) and fixing is known (see Patent Document 1).
This alignment jig uses an L-shaped jig to sandwich the inkjet head between both moving elements and both urging mechanisms, and moves both moving elements back and forth in the X-axis direction and the Y-axis direction, respectively. Adjust the head position. The ink jet head is temporarily fixed to the head plate with an adhesive, and is finally fixed by fastening with a screw after the adhesive is cured.

JP 2008-279695 A

  However, in the above-described alignment jig, not only two urging mechanisms are required to move the inkjet head minutely, but also in order to perform positioning with high accuracy, the urging direction and the urging force are required. Since each urging mechanism is arranged in consideration of the above, problems have arisen that the structure of the alignment jig itself is complicated (upsizing, cost increase, etc.). Further, in order to improve productivity, before the adhesive is completely cured, the fixing by both the moving elements and the both urging mechanisms is often released. In this case, at the moment when the fixing is released, the ink jet head may be slightly displaced from the temporarily fixed position due to the urging force of both urging mechanisms. In addition, once the position is shifted, there is a problem that it takes time to temporarily fix the inkjet head again, such as removal of the adhesive.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an inkjet head alignment jig in which an attachment piece for positioning an inkjet head on a head plate with a simple configuration is assembled to a flange portion of the inkjet head with high accuracy.

  An alignment jig for an ink jet head according to the present invention includes a first direction which is an arbitrary one direction in a plane on the flange portion, in order to position the ink jet head on the head plate. An ink-jet head alignment jig that positions and mounts attachment pieces in a second direction and a rotation direction that are orthogonal to each other, and is attached at a base plate on which an ink-jet head temporarily attached with the attachment pieces is set and an intermediate portion in the first direction. The alignment target member that locks the piece, the first member facing the one end of the alignment target member, the alignment target member being locked with a minute gap, and being slidably supported in the first direction on the base plate The first push-pull member includes a first push-pull member and a spindle coupled to the first push-pull member. A first micrometer head that reciprocally moves the member to be aligned in the first direction through the member, and faces one end of the member to be aligned, and holds the member to be aligned with a minute gap, and a base plate The second push-pull member supported so as to be slidable in the second direction on the upper side and the spindle coupled to the second push-pull member cause the one end side of the member to be aligned to be first through the second push-pull member. A second micrometer head that reciprocally moves in two directions and the other end of the member to be aligned, and the member to be aligned is locked with a minute gap, and is slidable in the second direction on the base plate The third member to be aligned is supported by the third push / pull member supported and the spindle connected to the third push / pull member via the third push / pull member. Characterized by comprising a third micrometer head reciprocatingly fine movement the other end side in the second direction.

According to this configuration, during the forward and backward movements of the spindle of each micrometer head, the member to be aligned and each push / pull member are locked with a minute gap. In a state where the pulling member comes into contact with the member to be aligned, the member to be aligned is reciprocally moved in each direction (first direction, second rotation, rotation direction). Therefore, the member to be aligned is not fixed by each push-pull member, and no force acts on the member to be aligned. That is, the minute gap is used as an adjustment allowance for minute movement that allows minute movement (positioning) in the second direction while allowing movement in the first direction. For this reason, for example, after the positioning operation is completed, even if the locked state between the member to be aligned and each push-pull member is released with the adhesive for temporary fixing being uncured, the alignment (positioning) position There is no deviation. Further, this makes it possible to align the first direction and the second direction at the same time. Note that the “minute gap” refers to a millimeter-order gap. “Small reciprocating movement” refers to movement of a distance on the order of micrometers.
Further, since each push-pull member is connected to the spindle of each micrometer head, the push-pull member moves reciprocally and finely as the spindles advance and retreat (reciprocate minute movement). Therefore, the attachment piece can be reciprocally moved in any direction (first direction, second rotation, rotation direction) via the alignment target member. Thereby, the inkjet head can be positioned with the shortest movement amount. The reciprocating minute movement in the rotation direction is performed by moving the second micrometer head and the third micrometer head in opposite directions.

  In this case, a locking opening for locking the first push-pull member is formed at one end of the aligned member, and a top connected to the first push-pull member is connected to the spindle of the first micrometer head. The first push-pull member is mounted on the base plate so as to be slidable in the first direction, and the locking pin is erected on the slide base and loosely fitted into the locking opening from below. It is preferable to have a fitting connection portion that is erected on the slide base and in which the top member is fitted and connected from above.

  Further, in this case, a top member coupled to the second push / pull member is attached to the spindle of the second micrometer head, and the second push / pull member is supported to be slidable in the second direction on the base plate. A slide base, an engaging portion that is erected on the slide base, and in which the member to be aligned is loosely fitted from above in the second direction, and a fitting that is erected on the slide base and that the top member is fitted and connected from above It is preferable to have a joint part.

  Further, in this case, a top member coupled to the third push / pull member is attached to the spindle of the third micrometer head, and the third push / pull member is supported to be slidable in the second direction on the base plate. A slide base, an engaging portion that is erected on the slide base, and in which the member to be aligned is loosely fitted from above in the second direction, and a fitting that is erected on the slide base and that the top member is fitted and connected from above It is preferable to have a joint part.

  According to these configurations, the push-pull members (first to third) and the spindles of the micrometer heads (first to third) are connected by engaging the top members at the fitting connection portions. Therefore, the reciprocating minute movement of each spindle can be reliably transmitted to the slide base. Accordingly, the member to be aligned can be finely moved in each direction (first direction, second rotation, and rotation direction) with high accuracy without restraining the member to be aligned.

  In this case, it is preferable that the locking portion is provided with a gap adjusting mechanism for adjusting the size of the minute gap with the loosely aligned member to be aligned.

  According to this configuration, the response time when moving from the forward movement to the backward movement (or vice versa) can be adjusted by arbitrarily adjusting the minute gap (free fitting state) between the locking portion and the member to be aligned. Can do. For example, when importance is placed on the efficiency of positioning work, the minute gap is made small (narrow), and when the member to be aligned (attachment piece) is removed, the minute gap is made large (wide). Thereby, the workability | operativity of the positioning operation | work of an operator's attachment piece and the supply / discharge material work of the attachment piece to an alignment jig improves.

  It is preferable to further include pressing means for pressing the mounting piece against the flange portion of the inkjet head via the alignment target member.

  According to this configuration, since the attachment piece in the pressed state is difficult to move minutely, even if a force is applied to the member to be aligned for some reason, such as an operator accidentally touching the member to be aligned, The positioning state of the mounting piece after being finely moved can be accurately maintained. In addition, for example, even when the positioning state of the mounting piece is temporarily fixed with an adhesive or the like, it is possible to prevent positional deviation until the adhesive is cured. In addition, it is preferable that the pressing by the pressing means is performed with a force that allows the mounting piece to be reciprocally moved by each micrometer head.

It is a perspective view of an inkjet head. It is a perspective view of an alignment mask. It is the top view (a) and side view (b) of an alignment mask. It is a perspective view of the assembly apparatus of an inkjet head. It is a side view of the assembly apparatus of an inkjet head. It is a perspective view of a set table and an alignment jig. It is a disassembled perspective view of an alignment jig. It is the top view (a) of an alignment jig, a side view (b), and the expanded sectional view which partially showed the 1st micrometer head and the 1st pushing / pulling member. It is a flowchart of the assembly method of an inkjet head. It is a perspective view of the alignment mask which concerns on 2nd Embodiment.

  Hereinafter, an inkjet head assembling method and an inkjet head assembling apparatus (hereinafter simply referred to as an “assembling apparatus”) using an alignment jig according to an embodiment of the present invention will be described with reference to the accompanying drawings. In this assembly apparatus, an attachment piece for attaching an inkjet head to a head plate with high accuracy is assembled with high accuracy to a flange portion of the inkjet head using an alignment mask as a positioning reference. Therefore, first, an inkjet head and an attachment piece as an assembly target and an alignment mask as an assembly standard will be described.

  As shown in FIG. 1, the inkjet head 1 is provided on an ink introduction part 2 having two ink introduction ports (not shown), a head main body 3 connected to the ink introduction part 2, and a peripheral side surface of the head main body 3. And a flange portion 4. The head body 3 includes a nozzle plate 5 having a nozzle surface 8 in which a plurality of discharge nozzles 7 are opened. The nozzle plate 5 includes two nozzle rows 6 each including a plurality of discharge nozzles 7 parallel to each other. Is formed. In this case, the two nozzle rows 6 are arranged with a 1/2 nozzle pitch position shift in the nozzle row direction. The positioning reference of the inkjet head 1 described later uses the two outermost discharge nozzles 7 of the two nozzle rows 6. Of course, instead of the two discharge nozzles 7, two marks for image recognition may be formed on the nozzle surface 8 (not shown).

  The flange portion 4 is a member for attaching the inkjet head 1 to a head plate (not shown), and a fitting port 11 into which the head main body 3 is fitted is widely formed in the center portion thereof. In addition, a pair of attachment portions 12 to which attachment pieces 21 are respectively attached are extended at both ends in the long side direction of the flange portion 4, and a step portion is provided outside the attachment portion 12, and screws are attached to the head plate. A fixing portion 13 for stopping is extended. A pair of position restricting projections 14 for roughly restricting the position of the attachment piece 21 are provided at both ends in the width direction of each attachment portion 12.

  Each attachment piece 21 is formed of a rectangular silicon chip, and a positioning hole 22 into which a positioning protrusion (not shown) attached to the head plate is fitted is formed at the center. Further, a pair of mounting piece marks 23 for positioning with respect to the discharge nozzle 7 (nozzle row 6) are formed on the surfaces of both ends in the long side direction of each mounting piece 21. Further, a pair of notch grooves 24 corresponding to (engaging with) the pair of position restricting projections 14 of the flange portion 4 are formed at both ends in the long side direction of each mounting piece 21, and the inside of the pair of mounting piece marks 23 is formed. A pair of engagement holes 25 is formed in which a pair of engagement protrusions (not shown) to be described later are engaged. The positioning hole 22, the mounting piece mark 23, the notch groove 24, and the engagement hole 25 are formed by etching the silicon chip (anisotropic etching).

  As shown in FIGS. 2 and 3, the alignment mask 31 includes a first mask plate 32 on which first positioning marks 41 (head reference positions) corresponding to the two ejection nozzles 7 are formed, and a first mask plate. A first mask holder 33 for holding 32, a second mask plate 34 on which a second positioning mark 51 (attachment piece reference position) corresponding to each attachment piece mark 23 of the pair of attachment pieces 21 is formed, and a second mask A second mask holder 35 for holding the plate 34 and a mask base plate 36 for supporting them are configured.

  The first mask plate 32 is formed of a glass material (quartz glass) larger than the nozzle surface 8 in a rectangular shape, and a first positioning composed of two nozzle marks 42 and 42 at both ends in the long side direction of the surface. A mark 41 is formed. The two nozzle marks 42, 42 correspond to the discharge nozzle 7 at one end in one nozzle row 6 and the discharge nozzle 7 at the other end in the other nozzle row 6.

  The first mask holder 33 includes a first plate 43 disposed so as to straddle the central portion of the second mask plate 34, and four first fixing pieces 44 that press and fix the first mask plate 32 to the first plate 43. And is composed of. The first plate 43 has a concave groove 45 that spans the second mask plate 34 with a gap, and is screwed to the second mask holder 35 at four corners. The four first fixing pieces 44 are arranged at a total of four locations, two on each long side of the first mask plate 32, and are screwed to the first plate 43, respectively. Each first fixing piece 44 is formed in a cross-sectional “L” shape by a fixing piece portion 46 fixed to the first plate 43 and a pressing piece portion 47 that presses the first mask plate 32. A cushion sheet 48 having the same planar shape as the pressing piece 47 is interposed between the piece 47 and the first mask plate 32.

  Like the first mask plate 32, the second mask plate 34 is formed of a glass material (quartz glass) in a rectangular shape, and a total of four front and rear pairs are attached to both ends in the long side direction of the surface. A second positioning mark 51 including the use mark 52 is formed. Each pair of mounting marks 52 corresponds to a pair of mounting piece marks 23 formed on each mounting piece 21. That is, each pair, a total of four mounting marks 52, corresponds to each pair, a total of four mounting piece marks 23, of the pair of mounting pieces 21 attached to the flange portion 4 of the inkjet head 1.

  The second mask holder 35 includes a second plate 53 that is slightly larger than the second mask plate 34, and four second fixing pieces 55 that press and fix the second mask plate 34 to the second plate 53. Has been. The second plate 53 has a pair of front and rear fixed leg portions 54 and is screwed to the mask base plate 36 at portions (four corners) of the fixed leg portions 54. The four second fixing pieces 55 are arranged at four positions, two on each long side of the second mask plate 34 at a position disengaged from the first mask holder 33. It is screwed. Each second fixed piece 55 has the same form as the first fixed piece 44, and includes a fixed piece portion 46 fixed to the second plate 53, and a pressing piece portion 47 that presses the second mask plate 34. The cross section is formed in an “L” shape. In addition, a cushion sheet 48 having the same planar shape as the pressing piece 47 is interposed between the pressing piece 47 and the second mask plate 34.

  The mask base plate 36 is formed in a rectangular plate shape large enough to place the first mask holder 33 and the second mask holder 35, and both end portions thereof are chamfered. In addition, a catch (not shown) of a pair of fixing brackets 69 to be described later is attached to the chamfered portion so that the mask base plate 36 can be hooked on the set table 64.

  The first mask holder 33 holding the first mask plate 32 is supported by the second mask holder 35 across the second mask plate 34, and the second mask holder 35 is supported by the mask base plate 36. The first mask plate 32 and the second mask plate 34 are respectively held by the first mask holder 33 and the second mask holder 35 so that the surfaces thereof are parallel to each other. The distance between the surface of the first mask plate 32 and the surface of the second mask plate 34 is attached to the surface of the nozzle surface 8 of the inkjet head 1 on which the discharge nozzle 7 is formed and the flange portion 4. The distance corresponding to the surface of the mounting piece 21 on which the mounting piece mark 23 is formed is formed. That is, the first positioning mark 41 (nozzle mark 42) and the discharge nozzle 7 that serves as a positioning reference, and the second positioning mark 51 (mounting mark 52) and the mounting piece mark 23 that serves as a positioning reference have a planar direction and a high height. Since they match in any direction, the mounting piece 21 can be accurately positioned with respect to the flange portion 4 of the inkjet head 1.

Next, with reference to FIGS. 4 to 8, an assembly device 60 used when assembling each mounting piece 21 to the flange portion 4 of the inkjet head 1 will be described. In order to simplify the following description, in FIGS. 4 and 6 to 8, the left-right direction is defined as the X-axis direction, and the front-rear direction is defined as the Y-axis direction.
As shown in FIGS. 4 and 5, the assembling apparatus 60 includes a machine base 61 in which two rectangular plates 67 are connected by lattice-shaped rib pieces 68, and a moving table 62 (head) mounted on the front part of the machine base 61. Position adjusting means), a bracket frame 63 mounted on the rear portion of the machine base 61, a set table 64 provided on the moving table 62, and a set table 64 for positioning and fixing the mounting piece 21 to the flange portion 4. Alignment jig 65 (attachment piece position adjusting means), an image recognition unit 66 (image recognition means) supported by the bracket frame 63 and facing the alignment jig 65 from above, and a display connected to the image recognition unit 66. And a controller (both not shown).

  The set table 64 of the present embodiment is configured so that the alignment mask 31 and the alignment jig 65 can be exchanged and set. In the assembling apparatus 60, after the image recognition of the alignment mask 31 by the image recognition unit 66 is performed, an alignment jig 65 is set instead of the alignment mask 31. The operator first operates the moving table 62 to position the inkjet head 1 on the alignment jig 65. Next, the alignment jig 65 on the moving table 62 is operated to align the pair of attachment pieces 21 with the flange portion 4 of the inkjet head 1. Finally, an adhesive is injected between each attachment piece 21 and the flange portion 4 to bond the pair of attachment pieces 21 to the flange portion 4.

  The moving table 62 includes an X-axis table 71 that moves the set table 64 in the X-axis direction (second direction), a Y-axis table 72 that moves the set table 64 in the Y-axis direction (first direction), and a set table 64. And a θ table 73 that moves in the θ direction (rotation direction). In the present embodiment, the θ table 73, the Y-axis table 72, and the X-axis table 71 are mounted in this order on the table base 74 fixed on the rectangular plate 67 described above. The X-axis table 71, the Y-axis table 72, and the θ table 73 are respectively an X-axis micrometer head 75 (second movement micrometer head) and a Y-axis micrometer head 76 (first movement micrometer head). ) And θ rotation micrometer head 77 is moved in each direction by manual operation. Thereby, the position of the set table 64 is adjusted in each direction.

  The moving table 62 is mainly used during image recognition of the alignment mask 31 and alignment of the inkjet head 1. At the time of image recognition, the first positioning mark 41 and the second positioning mark 51 of the alignment mask 31 are set via the set table 64 so as to be within the field of view of each of the cameras 111 and 112 described later constituting the image recognition unit 66. Then, the alignment mask 31 is moved. Further, at the time of alignment, the inkjet head 1 is moved via the set table 64 so that each nozzle mark 42 (first positioning mark 41) matches each corresponding discharge nozzle 7.

  As shown in FIG. 6, the set table 64 is a substantially block-shaped member, and is separated on the upper surface in the X-axis direction so that the alignment mask 31 or the alignment jig 65 is slid from the front side and set. A pair of guide grooves 64a formed in this manner and a pair of fixing holes 64b for immovably locking the alignment mask 31 or the alignment jig 65 when set at a normal position are formed. Further, between the pair of guide grooves 64a, a head recessed portion 64c that faces the inkjet head 1 supported by the alignment jig 65 when the alignment jig 65 is set is formed so as to be largely swept away from the front side. Has been. Furthermore, a pair of fixing brackets 69 are provided at both ends of the set table 64 in the X-axis direction (left and right) to fix the alignment mask 31 and the alignment jig 65 on the set table 64 while being positioned. . For this reason, the mask base plate 36 of the alignment mask 31 and the base plate 81 of the alignment jig 65 described later have substantially the same form. Each fixing bracket 69 is constituted by a so-called patch lock, and a latch (not shown) is fixed to the set table 64.

  The pair of guide grooves 64a extends in the Y-axis direction from the front side, and a pair of guide pins 65a projecting from the bottom surface of the alignment mask 31 and the alignment jig 65 are engaged with each guide groove 64a. (The guide pins 65a of the alignment mask 31 are not shown). Further, in order to facilitate the engagement of each guide pin 65a, the front side of each guide groove 64a is chamfered to increase the groove width.

  Each fixing hole 64b is provided on the near side and outside each guide groove 64a, and each fixing hole 64b has a pair of fixing pins 65b protruding from the bottom surfaces of the alignment mask 31 and the alignment jig 65. Are engaged (the fixing pin 65b of the alignment mask 31 is not shown).

  Here, with reference to FIG. 6, the case where the alignment jig 65 is set on the set table 64 will be described as an example. First, the operator engages the pair of guide pins 65a of the alignment jig 65 with the pair of guide grooves 64a. Next, the alignment jig 65 is pushed backward along each guide groove 64a. At this time, the front side of the alignment jig 65 is slid in a slightly lifted state so that the pair of fixing pins 65 b are not caught on the front surface of the set table 64. When each fixing pin 65b comes into contact with the rear end of each guide groove 64a, the front side of the alignment jig 65 is lowered to engage each fixing pin 65b with each fixing hole 64b. Finally, the alignment jig 65 is fixed on the set table 64 by a pair of left and right fixing brackets 69.

  The alignment jig 65 will be described with reference to FIGS. The alignment jig 65 includes a base plate 81 having an insertion hole 88 through which the inkjet head 1 is inserted in the center, and the inkjet head 1 inverted upside down at the flange portion 4 and a head fixed to the base plate 81. A holding plate 82 and a pair of left and right adjustments that are arranged so as to cross the head holding plate 82 in the Y-axis direction and engage with the attachment piece 21 (the engagement hole 25 thereof) temporarily placed on the flange portion 4 on the lower surface. Bar 83 (member to be aligned), pressing block 84 (pressing means) that presses the pair of attachment pieces 21 via the adjustment bars 83, and left and right positions of the pair of attachment pieces 21 that are adjusted via the adjustment bars 83 A pair of adjustment units 85 (attachment piece adjustment mechanisms).

  The head holding plate 82 is formed slightly larger than the flange portion 4 of the inkjet head 1 and has a substantially similar shape, and a set hole 87 for setting the inkjet head 1 is formed in the center thereof. The ink jet head 1 is turned upside down and inserted into the set hole 87 from above, so that the flange portion 4 is seated on the head holding plate 82. In this state, the flange portion 4 is screwed to the head holding plate 82, whereby the inkjet head 1 is fixed to the head holding plate 82.

  The base plate 81 is formed in a rectangular plate shape, and as described above, a horizontally long insertion hole 88 through which the inkjet head 1 is inserted is formed in the center portion. Further, the above-described pair of adjustment units 85 is fixed around the insertion hole 88 so as to escape the head holding plate 82 fixed thereto. Further, the left and right end portions of the base plate 81 are chamfered, and a catcher (not shown) of the fixing bracket 69 is attached to the chamfered surface.

  Each adjustment bar 83 has an inverted “U” -shaped shallow groove 101 on the lower surface of the intermediate portion in the Y-axis direction, and spans the flange portion 4 (mounting piece 21) of the inkjet head 1 by the shallow groove 101. It is arranged. The shallow groove 101 is provided with a pair of engagement protrusions (not shown) spaced apart in the Y-axis direction. The pair of engagement protrusions are a pair of engagement holes 25 of the mounting piece 21. Engage with. Therefore, the position of the mounting piece 21 is adjusted within the XY plane by appropriately moving the adjustment bar 83 back and forth in the X axis direction, the Y axis direction, and the θ direction. Further, since the attachment piece 21 has a form (size, shape) that can be locked to each adjustment bar 83, for example, even when a plurality of types of attachment pieces 21 having different forms are assembled, the adjustment unit 85 is changed. Positioning can be performed without adding. Note that “micro reciprocating movement” refers to movement of a distance of a micrometer order or less.

  Each shallow groove 101 is formed with a pair of peep holes 102 and 102 so as to be positioned outside the pair of engaging protrusions so that the attachment piece mark 23 of the attachment piece 21 can be recognized. Further, on the front side of each adjustment bar 83, a locking opening 133 for engaging (freely fitting) a locking pin 132 of a first push-pull member 94, which will be described later, with a predetermined minute gap is provided above and below. It opens through in the direction. Each locking opening 133 is a substantially rectangular opening, and is sufficiently larger than the diameter of the locking pin 132 so as to allow the reciprocating minute movement of the locking pin 132 in the XY plane. Each adjustment bar 83 is formed symmetrically, and the locking opening 133 is also formed on the rear side (back side) of each adjustment bar 83 so that it can be used even if the left and right are switched. The “micro gap” refers to a millimeter order gap.

  The pressing block 84 is disposed so as to straddle the nozzle surface 8 of the inkjet head 1 and the pair of adjustment bars 83, and is fixed to the head holding plate 82 by a pair of leg portions 103 provided at both ends thereof. In the portion corresponding to each adjustment bar 83 in the pressing block 84, a pressing head 104 incorporating a spring is incorporated. Each pressing head 104 presses the adjustment bar 83 and presses the attachment piece 21 against the flange portion 4 via the adjustment bar 83. Thus, each attachment piece 21 moves minutely (positions) in the pressed state. As a result, each attachment piece 21 is difficult to move minutely, so that even if a force is applied to each adjustment bar 83 for some reason, for example, an operator accidentally touches the adjustment bar 83, the attachment pieces 21 are slightly moved. The positioning state of each subsequent mounting piece 21 can be accurately maintained. Moreover, although mentioned later for details, each positioning attachment piece 21 is adhere | attached in the state pressed against the flange part 4. FIG. It should be noted that the pressing by the pressing block 84 is performed with such a force that the mounting piece 21 can be moved minutely by each adjustment unit 85 and does not move minutely due to vibration or inclination when the alignment jig 65 is removed. preferable.

  Furthermore, a pair of window openings 105, 105 for image recognition that are connected to the pair of peep holes 102, 102 are formed on both sides in the Y-axis direction of each pressing head 104 in the pressing block 84. Similarly, two peep openings 106 and 106 for recognizing images of the two discharge nozzles 7 are formed in a portion corresponding to the nozzle surface 8 of the pressing block 84. The attachment piece mark 23 of each attachment piece 21 is image-recognized through the peep hole 102 and the window opening 105, and the two discharge nozzles 7 positioned at the outermost end are image-recognized from the two peep openings 106 and 106. .

  Each adjustment unit 85 includes a first micrometer head 91 that reciprocally moves the attachment piece 21 in the Y-axis direction via the adjustment bar 83, and a second micrometer on the front side that reciprocally moves in the X-axis direction and θ direction. A head 92 and a third micrometer head 93 on the rear side. Further, the pair of left and right adjustment units 85 face the front end of each adjustment bar 83, and hold each adjustment bar 83 with a minute gap between them, and on the base plate 81 by the first micrometer head 91. A pair of left and right first push-pull members 94 that are supported so as to be slidable in the Y-axis direction in conjunction with a minute movement, and from the front side of each adjustment bar 83 from the outside in the X-axis direction (each short side of the base plate 81). A pair of left and right second bars that are supported by the second micrometer head 92 so as to be slidable in the X-axis direction on the base plate 81 are interlocked with the minute movement by the second micrometer head 92. Both the push-pull member 95 and the rear side (back side) of each adjustment bar 83 face each other from the outside in the X-axis direction, and each adjustment bar 83 is locked with a small gap. , And a third micrometer head 93 third push pull-out member 96 of the pair which is supported slidably in the X-axis direction in conjunction with the small movement due on the base plate 81, a.

  The pair of left and right first micrometer heads 91 face away from the long side portion on the front side of the base plate 81, and the spindle 97 (output shaft) faces rearward (inner side) so that the L-shaped support member 98 It is supported and fixed to the elevation part. The pair of left and right second micrometer heads 92 face the front side of the base plate 81 and the short sides of the left and right ends, respectively. Similarly, the pair of left and right third micrometer heads 93 Side), facing the short sides at both ends. Each of the second micrometer head 92 and the third micrometer head 93 is supported and fixed to the vertical surface portion of the support member 98 with its spindle 97 facing inward with respect to the base plate 81. Each support member 98 is disposed on the base plate 81 so that the elevational surface portion faces the outside of the base plate 81 and the flat surface portion faces the inside of the base plate 81.

  Further, a top member 99 to be fitted to each push-pull member 94, 95, 96 described later is fixed to the tip end portion of the spindle 97 of each micrometer head 91, 92, 93 (FIG. 8A, (See (c)). Each piece member 99 is a disk-shaped member, and is connected to the spindle 97 of each micrometer head 91, 92, 93 at the center of the circle. That is, each piece member 99 advances and retreats (reciprocating minute movement) in conjunction with the advance and retreat (reciprocating minute movement) of the spindle 97.

  The above-described spindle 97 is for coarse movement that moves about 0.5 mm per rotation. However, in each micrometer head 91, 92, 93 of this embodiment, the tip end portion of the spindle 97 is coaxial. A fine adjustment spindle 97a for fine movement that moves about 25 μm per rotation is provided (see FIGS. 8A and 8C). That is, the top member 99 is fixed to the outer peripheral portion of the tip of the spindle 97 for coarse movement. Although a detailed description is omitted, the spindle 97 and the fine adjustment spindle 97a can be moved independently to each micrometer head 91, 92, 93. With this fine adjustment spindle 97a, the final position adjustment of several micrometers is performed with respect to the mounting piece 21.

  Each first push-pull member 94 is supported on a Y-axis slide base 131 that is slidably supported in the Y-axis direction on the base plate 81, and a locking opening that is erected on the Y-axis slide base 131 and opens in each adjustment bar 83. The locking pin 132 loosely fitted to the lower side 133 and the Y-axis fitting connecting portion 134 that is erected on the Y-axis slide base 131 and is connected to the top member 99 from the upper side are integrally formed. Is formed. Each second push / pull member 95 and each third push / pull member 96 are erected on an X-axis slide base 135 supported on a base plate 81 so as to be slidable in the X-axis direction. A locking portion 136 in which the adjustment bar 83 is loosely fitted in the direction from above, an X-axis fitting coupling portion 137 that is erected on the X-axis slide base 135 and that the top member 99 is fitted and connected from above, Are integrally formed.

  Each of the Y-axis slide base 131 (see FIG. 8C) and each X-axis slide base 135 (see FIG. 7) is a plate-like portion, and is formed on the lower surface of the flat portion of the support member 98 described above. A guide engaging portion (not shown) is slidably engaged with a guide rail (not shown).

  Each locking pin 132 is a cylindrical portion erected on the rear side (back side) of the Y-axis slide base 131 (see FIGS. 8A and 8C). Each locking pin 132 is loosely fitted in the above-described locking opening 133 and hits the inner surface of the locking opening 133 on the traveling direction side when the adjustment bar 83 is slightly moved in the Y-axis direction. Therefore, the reciprocating minute movement of each adjustment bar 83 in the Y-axis direction is not performed by grasping (fixing) the adjustment bar 83, but the locking pin 132 contacts the adjustment bar 83 only from one direction. Is called.

  Each Y-axis fitting connecting portion 134 includes two Y-axis connecting uprights erected along the X-axis direction at a substantially central portion in the Y-axis direction and an outer end portion of the base plate 81 in each Y-axis slide base 131. It is composed of an installation part 138. A piece member 99 is fitted and fixed between the two Y-axis connection standing portions 138. Thereby, the forward / backward movement (reciprocating minute movement) of the spindle 97 of the first micrometer head 91 can be reliably transmitted to the first push / pull member 94 via the top member 99.

  On the other hand, each locking portion 136 has two plate-like engagements standing in the Y-axis direction at the inner end portion of the base plate 81 and the substantially central portion in the X-axis direction in each X-axis slide base 135. It is composed of a standing part 139. The two locking upright portions 139 stand upright apart from each other in the X-axis direction, and the adjustment bar 83 has a predetermined minute gap between the two locking upright portions 139. Is engaged (free fitting). Specifically, the front side end portion (rear side of the locking opening 133) of each adjustment bar 83 is loosely fitted to the locking portion 136 of each second push-pull member 95, and the rear side end portion of each adjustment bar 83. Is loosely fitted to the locking portion 136 of each third push-pull member 96. When the adjustment bar 83 is slightly moved in the X-axis direction, the locking standing portion 139 on the opposite side of the moving direction of each locking portion 136 contacts the adjustment bar 83. That is, the locking portion 136 comes into contact with the adjustment bar 83. Therefore, the reciprocating minute movement of each adjustment bar 83 in the X-axis direction is also performed by the locking portion 136 contacting the adjustment bar 83 only from one direction, similarly to the reciprocating minute movement in the Y-axis direction.

  In addition, each locking portion 136 is provided with a gap adjusting mechanism 140 that adjusts the size of the minute gap with the loosely fitted adjustment bar 83. Each gap adjustment mechanism 140 includes a male screw member 141 screwed into a female screw hole (not shown) penetratingly formed in a locking standing portion 139 located inside the base plate 81, and an outer side of the locking standing portion 139. And a nut 142 that is screwed into the male screw member 141 to prevent the male screw member 141 from loosening. Each male screw member 141 is screwed into a female screw hole, and a tip portion thereof comes into contact with an adjustment bar 83 that is loosely fitted to the locking portion 136. By adjusting the screwing amount of each male screw member 141, the size of the minute gap between the locking portion 136 and the adjustment bar 83 can be adjusted. Thereby, in the reciprocating minute movement, it is possible to adjust the response time when moving from the forward movement to the backward movement (or vice versa). For example, when importance is placed on the efficiency of positioning work, the minute gap is made smaller (narrow), and when the adjustment bar 83 (attachment piece 21) is removed, the minute gap is made larger (wider). Thereby, the workability | operativity of the positioning work of the attachment piece 21 of an operator and the supply / discharge material work of the attachment piece 21 to the alignment jig 65 improves. This minute gap is also an adjustment range by the fine adjustment spindle 97a of each micrometer head 92, 93.

  In each X-axis slide base 135, the X-axis fitting connection portion 137 is provided along the Y-axis direction at the locking standing portion 139 erected at the substantially central portion in the X-axis direction and the outer end portion of the base plate 81. And an upright X-axis connecting portion 143. Similar to the Y-axis fitting connection portion 134, the top member 99 is fitted and fixed between the locking standing part 139 and the X-axis connection standing part 143 from above. As a result, the forward / backward movement (reciprocating minute movement) of the spindle 97 of each second micrometer head 92 and each third micrometer head 93 via the top member 99 is changed to each second push-pull member 95 and third push-pull member. 96 can be reliably transmitted.

  In each of the adjustment units 85, when each first micrometer head 91 is rotated forward and backward, the adjustment bar 83 is reciprocally moved in the Y-axis direction (front-rear direction) via the top member 99 and the first push / pull member 94. Moving. When the second micrometer head 92 is rotated forward and backward, the front side of the adjustment bar 83 reciprocates slightly in the X-axis direction (left-right direction) via the top member 99 and the second push / pull member 95. Similarly, when the third micrometer head 93 is rotated forward and backward, the rear side of the adjustment bar 83 reciprocates slightly in the left-right direction via the top member 99 and the first push / pull member 94. Accordingly, the position of the mounting piece 21 in the front-rear direction is adjusted by the first micrometer head 91 via the adjustment bar 83, and the mounting piece 21 is adjusted by the second and third micrometer heads 92 and 93 via the adjustment bar 83. The horizontal position and the in-plane inclination (θ direction) are adjusted. Thereby, it is possible to perform alignment in the X-axis direction and the Y-axis direction at the same time and with the shortest movement amount. Further, since each push / pull member 94, 95, 96 and each adjustment bar 83 are engaged (freely fitted) with a predetermined minute gap, they are minute in the Y-axis direction (X-axis direction). A minute movement (positioning) in the X-axis direction (Y-axis direction) can be performed in a state where the movement is allowed. That is, the minute gap is used as an adjustment allowance for minute movement. The reciprocating minute movement in the rotation direction is performed by moving the second micrometer head 92 and the third micrometer head 93 in opposite directions.

  As shown in FIGS. 4 and 5, the image recognition unit 66 is incorporated in the unit base 110 supported by the bracket frame 63 in a cantilever manner and the unit base 110, and mainly recognizes the two nozzle marks 42 respectively. Illuminated two nozzle cameras 111, four mounting cameras 112 that are incorporated in the unit base 110 and mainly recognize images of the four mounting marks 52, two nozzle cameras 111, and And a plurality of camera position adjusting mechanisms 113 for calibrating the four mounting cameras 112, respectively.

  In the image recognition, the six cameras 111 and 112 are calibrated by the camera position adjustment mechanism 113 so that the corresponding marks 41 and 51 of the alignment mask 31 are in the center of the field of view, and are fixed after the calibration. Functions as a camera. The two nozzle cameras 111 recognize images of the two nozzle marks 42 of the alignment mask 31 and the two discharge nozzles 7 of the inkjet head 1, and the four mounting cameras 112 are four mounting marks of the alignment mask 31. A total of four attachment piece marks 23 of 52 and a pair of attachment pieces 21 are recognized.

  Next, with reference to FIG. 9, the assembly method of the inkjet head 1 which assembles | attaches a pair of attachment piece 21 to the flange part 4 of the inkjet head 1 in a positioning state using the alignment mask 31 is demonstrated. In this assembling method, the alignment mask 31 described above is first placed on the set table 64 in a positioned state, and fixed with a pair of fixing brackets 69 and 69 (mask setting step S1). Next, each of the marks 41 and 51 on the alignment mask 31 is recognized (mask recognition step S2). Specifically, after the alignment mask 31 and the image recognition unit 66 are simply aligned by the moving table 62, the two nozzle marks 42 are image-recognized by the two nozzle cameras 111, and the four mounting cameras 112 are mounted. Thus, the four mounting marks 52 are recognized as images. And the recognition result by this image recognition is memorize | stored in a controller.

  Next, instead of the alignment mask 31, the alignment jig 65 is set on the set table 64 in a positioned state (head and attachment piece setting step S3). In this case, in the outer step, the inkjet head 1 and the pair of attachment pieces 21 are set in advance in the alignment jig 65, and the pair of adjustment bars 83 and the pressing block 84 are set in advance. The pair of attachment pieces 21, 21, the pair of adjustment bars 83, 83, and the pressing block 84 may be set after the inkjet head 1 is positioned.

  Next, the moving table 62 is operated while referring to the recognition result of the controller (display), and the discharge nozzle 7 at the outermost end of the inkjet head 1 serving as a positioning reference is placed on the two nozzle marks 42 that have been image-recognized. Align (head positioning step S4). Subsequently, while referring to the recognition result in the same manner, this time, the adjustment unit 85 aligns the four attachment mark marks 23 serving as the positioning reference with the four attachment marks 52 that have been image-recognized, respectively. Is positioned (attachment piece positioning step S5).

  Specifically, the two mounting piece marks 23 are aligned with the two mounting marks 52 by one adjusting unit 85 to position one mounting piece 21, and then the other adjusting unit 85 The other two mounting pieces 21 are positioned by aligning the two mounting piece marks 23 with the other two mounting marks 52. In this case, in the positioning operation of the other mounting piece 21, when one mounting piece 21 is displaced, this is repeated. That is, the positional deviation of the mounting piece mark 23 with respect to the mounting mark 52 is corrected little by little, and finally the four mounting piece marks 23 are aligned with the four mounting marks 52 to position the pair of mounting pieces 21. To do. In each adjustment unit 85 of the present embodiment, each adjustment bar 83 is not fixed by each push-pull member, and no force is applied to each adjustment bar 83 after positioning. For this reason, after the positioning operation (head positioning step S4 and mounting piece positioning step S5) is completed, each adjustment bar 83 and each push-pull member 94 are in an uncured adhesive for temporary fixing in an adhesion step S6 described later. , 95, 96 even if the locked state is released, there is no deviation from the aligned (positioned) position.

  Finally, the instantaneous adhesive is injected into the contact portion between the flange portion 4 and the mounting piece 21 while maintaining the pressing by the adjusting bar 83 and the pressing block 84 (bonding step S6). Then, after the adhesive is dried or before drying, the alignment jig 65 is removed from the assembly table 60 from the set table 64. Then, the inkjet head 1 is taken out from the alignment jig 65 (taken out after the adhesive is dried). The assembly of the attachment piece 21 to the flange portion 4 of the inkjet head 1 is completed through the above steps. As described above, after the positioning operation is completed, the alignment jig 65 can be removed from the assembling apparatus 60 while maintaining the desired positioning state. After the positioning operation is completed, the next positioning operation can be performed immediately. Thereby, the positioning operation can be performed continuously and efficiently. Moreover, since each attachment piece 21 can be set and temporarily fixed with an adhesive (adhesion step S6) to the alignment jig 65 in the removed state, the work can be performed in a place where a sufficient work space can be secured. It can be carried out.

  According to the above configuration, the alignment jig 65 can be removed from the assembling apparatus 60 while maintaining the positioning state, and the locked state between each adjustment bar 83 and each push-pull member 94, 95, 96 is released. However, there is no deviation from the aligned (positioned) position.

  Next, an alignment mask 31 according to the second embodiment of the present invention will be described with reference to FIG. The alignment mask 31 includes a first mask plate 32 on which a first positioning mark 41 is formed, a second mask plate 34 on which a second positioning mark 51 is formed, and the first mask plate 32 and the second mask plate 34. It comprises a spacer 121 interposed therebetween, a mask holder 122 for holding them via a second mask plate 34, and a mask base plate 36 for supporting them.

  The first mask plate 32, the second mask plate 34, and the mask base plate 36 are the same as those of the first embodiment, and the mask holder 122 is the same as the second mask holder 35 of the first embodiment. is there. In this case, the spacer 121 is made of quartz glass or the like, like the first mask plate 32 and the second mask plate 34, and the first mask plate 32 is adhered to the spacer 121, and the spacer 121 is the second mask. Bonded to the plate 34. The second mask plate 34 is fixed to the mask holder 122 by four fixing pieces 123.

  Also in the second embodiment, the first positioning mark 41 and the second positioning mark 51 in the alignment mask 31 and the ejection nozzle 7 of the inkjet head 1 and the mounting piece mark 23 of the mounting piece 21 are in the plane direction and the height direction. Are consistent. For this reason, it is possible to accurately position the mounting piece 21 on the flange portion 4.

  In the first and second embodiments described above, two first positioning marks 41 are formed, but three or more first positioning marks 41 may be formed. In addition, two second positioning marks 51 are formed for positioning one mounting piece 21, but three or more second positioning marks 51 may be formed. Furthermore, although it is set as the structure which attaches a pair of attachment piece 21 to the flange part 4 of the inkjet head 1, it is good also as two or more pairs of attachment pieces 21. FIG. In addition, a pair of attachment pieces 21 is more preferable because the attachment pieces can be attached with high accuracy, but a configuration in which three or more attachment pieces 21 are attached may be used instead of the pair.

  1: inkjet head, 4: flange portion, 21: mounting piece, 65: alignment jig, 81: base plate, 83: adjustment bar, 84: pressing block, 91: first micrometer head, 92: second micrometer head , 93: third micrometer head, 94: first push-pull member, 95: second push-pull member, 96: third push-pull member, 99: piece member, 131: Y-axis slide base, 132: locking pin 133: Locking opening, 134: Y-axis fitting connection part, 135: X-axis slide base, 136: Locking part, 137: X-axis fitting connection part, 140: Gap adjustment mechanism

Claims (6)

In order to position the ink jet head on the head plate, the flange portion of the ink jet head is positioned in a first direction which is an arbitrary direction, a second direction orthogonal to the first direction, and a rotation direction in a plane on the flange portion. An alignment jig for an inkjet head for assembling the mounting piece,
A base plate on which the inkjet head temporarily mounted with the mounting piece is set;
A member to be aligned that locks the mounting piece at an intermediate portion in the first direction;
A first push-pull member that faces one end of the member to be aligned, holds the member to be aligned with a minute gap, and is slidably supported in the first direction on the base plate;
A first micrometer head that reciprocally moves the member to be aligned in the first direction via the first push-pull member by a spindle coupled to the first push-pull member;
A second push-pull member that faces one end of the member to be aligned, engages the member to be aligned in a minute gap, and is slidably supported in the second direction on the base plate;
A second micrometer head that reciprocally moves one end side of the member to be aligned in the second direction via the second push-pull member by a spindle connected to the second push-pull member;
A third push-pull member that faces the other end of the member to be aligned, holds the member to be aligned with a minute gap, and is supported slidably in the second direction on the base plate;
A third micrometer head that reciprocally moves the other end side of the member to be aligned in the second direction via the third push-pull member by a spindle coupled to the third push-pull member; An inkjet head alignment jig comprising: A locking opening for locking the first push-pull member is formed at one end of the aligned member,
A top member connected to the first push-pull member is attached to the spindle of the first micrometer head,
The first push-pull member is
A slide base supported slidably in the first direction on the base plate;
A locking pin standing on the slide base and loosely fitted into the locking opening from below;
2. The inkjet head alignment jig according to claim 1, further comprising: a fitting connection portion that is erected on the slide base and is connected to the top member by fitting from above. 3. A top member coupled to the second push / pull member is attached to the spindle of the second micrometer head,
The second push-pull member is
A slide base that is slidably supported in the second direction on the base plate;
A locking portion that is erected on the slide base and in which the aligned member is loosely fitted from above in the second direction;
3. An inkjet head alignment treatment according to claim 1, further comprising: a fitting connection portion that is erected on the slide base and is connected to the top member by fitting from above. Ingredients. A top member coupled to the third push-pull member is attached to the spindle of the third micrometer head,
The third push-pull member is
A slide base that is slidably supported in the second direction on the base plate;
A locking portion that is erected on the slide base and in which the aligned member is loosely fitted from above in the second direction;
4. The inkjet head according to claim 1, further comprising: a fitting connection portion that is erected on the slide base and is connected to the top member by fitting from above. 5. Alignment jig.   5. The inkjet head according to claim 3, wherein the locking portion is provided with a gap adjusting mechanism that adjusts a size of the minute gap between the loosely fitted member to be aligned. Alignment jig.   The inkjet head alignment treatment according to any one of claims 1 to 5, further comprising pressing means for pressing the attachment piece against the flange portion of the inkjet head via the alignment member. Ingredients.

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