WO2018173734A1 - インクジェットヘッドユニット及びインクジェットヘッドユニットの製造方法 - Google Patents
インクジェットヘッドユニット及びインクジェットヘッドユニットの製造方法 Download PDFInfo
- Publication number
- WO2018173734A1 WO2018173734A1 PCT/JP2018/008463 JP2018008463W WO2018173734A1 WO 2018173734 A1 WO2018173734 A1 WO 2018173734A1 JP 2018008463 W JP2018008463 W JP 2018008463W WO 2018173734 A1 WO2018173734 A1 WO 2018173734A1
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- WO
- WIPO (PCT)
- Prior art keywords
- head unit
- contact
- inkjet head
- ink jet
- ink
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J25/00—Actions or mechanisms not otherwise provided for
- B41J25/001—Mechanisms for bodily moving print heads or carriages parallel to the paper surface
- B41J25/003—Mechanisms for bodily moving print heads or carriages parallel to the paper surface for changing the angle between a print element array axis and the printing line, e.g. for dot density changes
Definitions
- the present invention relates to an inkjet head unit and a method for manufacturing the inkjet head unit.
- an ink jet recording apparatus in which a plurality of ink jet head units provided with nozzles for ejecting ink are arranged and attached to a fixing member or a carriage, and an image is recorded using the plurality of ink jet head units.
- An object of the present invention is to provide an ink jet head unit and a method of manufacturing the ink jet head unit that can reduce the trouble of accurately positioning and fixing a fixing member for each ink jet head unit.
- An ink discharge portion provided with nozzles for discharging ink;
- a holding unit for holding the ink discharge unit in a predetermined positional relationship;
- the holding portion has three abutting surfaces for determining a fixing position and a fixing angle with respect to a predetermined fixing member in a plane parallel to the ink ejection surface provided with the nozzle opening.
- An adjustment plate that adjusts the amount of positional deviation of the ink discharge portion relative to the holding portion is bonded to the abutting surface.
- the invention according to claim 2 is the ink jet head unit according to claim 1,
- the abutting surface is provided with a groove portion into which an adhesive member for adhesion to the adjustment plate is injected.
- One end of the groove is opened at the edge of the abutting surface, and the other end is closed in the abutting surface.
- the three abutting surfaces are concave bottom surfaces in which at least a part is embedded by bonding the adjusting plate.
- the invention according to claim 5 is the inkjet head unit according to any one of claims 1 to 4,
- the adjustment plate has a curved shape in which a side surface perpendicular to the abutting surface does not have a ridge angle.
- the invention according to claim 6 is the inkjet head unit according to any one of claims 1 to 5, At least a part of the three abutting surfaces and the adhesion surface of the adjusting plate to the abutting surface is a non-smooth surface.
- the invention according to claim 7 An ink discharge portion provided with a nozzle for discharging ink, and a holding portion for holding the ink discharge portion in a predetermined positional relationship, wherein the holding portion is an ink discharge surface provided with an opening of the nozzle
- FIG. 1 is a perspective view showing an external configuration of an inkjet head 1 which is an embodiment of the inkjet head unit of the present invention.
- FIG. 2A is a plan view of the inkjet head 1.
- FIG. 2B is a bottom view of the inkjet head 1.
- FIG. 2A also shows a part of the fixing member 200 to which the inkjet head 1 is attached. That is, the ink jet head unit of this embodiment has a single ink jet head 1, and is constituted only by this ink jet head 1.
- the inkjet head 1 includes a recording unit 11 (ink ejection unit), a housing 12 and the like.
- the recording unit 11 is a head chip or the like provided with a nozzle for ejecting ink, and one surface (nozzle opening surface 11a) is exposed and fixed from the bottom surface of the housing 12 as shown in FIG. 2B.
- nozzle opening surface 11a ink ejection surface
- openings of a plurality of nozzles are arranged in the opening area 111a, and each ejects ink.
- Nozzle arrangement reference position indicators 111c and 111d are provided on the nozzle opening surface 11a.
- the housing 12 includes a recording unit support member 121 (holding unit) that supports (holds in a predetermined positional relationship) the recording unit 11 and a cover member 122 that protrudes above the recording unit support member 121. As described above, the recording unit 11 is fixed and supported on the bottom surface of the recording unit support member 121.
- the cover member 122 accommodates a signal wiring member and the like inside.
- the ink flow paths 112 to 117 penetrate the inside and outside on both sides of the cover member 122.
- the ink flow paths 112 and 115 are ink supply flow paths to each nozzle (nozzle group) in the opening area 111a, and the ink flow paths 113, 114, 116, and 117 are ink flows from the nozzle group in the opening area 111a. It is a reflux path. These are connected to an external ink tank or the like via a liquid feed pump or the like.
- a connecting portion 122 a is provided on the upper surface side of the cover member 122.
- the connection unit 122 a is for transmitting a drive control signal related to ink ejection from each nozzle of the recording unit 11 to the recording unit 11.
- the connection unit 122a is connected to the circuit board inside the cover member 122, and a drive signal generated by the circuit board is supplied to an operation unit (such as a piezoelectric element) of the recording unit 11.
- a first protrusion 1211 and a second protrusion 1212 are provided at both ends in the longitudinal direction of the recording unit support member 121, respectively. These are used for positioning and fixing the recording unit 11, that is, each nozzle to the fixing member.
- the first protrusion 1211 has a first contact surface 1211a and a second contact surface 1211b.
- the first protrusion 1211 is provided with a screw hole 1211c.
- a first contact plate 123 is bonded to the first contact surface 1211a, and the first contact plate 123 is attached to a first pin 201 provided on a fixing member 200 attached to a carriage or the like of the inkjet recording apparatus.
- the second contact plate 124 is bonded to the second contact surface 1211b, and the second contact plate 124 contacts the first pin 201.
- the first contact surface 1211a (the contact surface of the first contact plate 123) and the second contact surface 1211b (the contact surface of the second contact plate 124) are provided perpendicular to each other.
- the inkjet head 1 is attached and fixed to the fixing member 200 with a screw 211 inserted into the screw hole 1211c.
- the second protrusion 1212 has a third contact surface 1212a.
- the second protrusion 1212 is provided with a screw hole 1212c.
- a third contact plate 125 is bonded to the third contact surface 1212a, and the third contact plate 125 contacts the second pin 202 provided on the fixing member 200.
- the inkjet head 1 is attached and fixed to the fixing member 200 with a screw 212 inserted through the screw hole 1212c.
- the inner diameters of the screw holes 1211c and 1212c have play with respect to the screws 211 and 212 (that is, larger than the diameters of the screws 211 and 212), respectively, and the screws 211 according to the position adjustment of the inkjet head 1 with respect to the fixing member 200. , 212 can be moved and fixed in the screw holes 1211c, 1212c.
- the first contact plate 123, the second contact plate 124, and the third contact plate 125 are collectively referred to as contact plates 123 to 125 (adjustment plates).
- the first contact surface 1211a, the second contact surface 1211b, and the third contact surface 1212a are collectively referred to as three abutting surfaces. These three abutting surfaces can be used to determine a fixing position and a fixing angle with respect to the fixing member 200 (first pin 201 and second pin 202) of the housing 12 (recording unit support member 121).
- the first protrusion 1211 determines the position of the recording unit support member 121 (that is, the recording unit 11) with reference to the first pin 201, and the second protrusion 1212 has the recording unit support member with reference to the second pin 202.
- the position (rotation angle, direction) of the rotation direction 121 is determined.
- the first contact surface 1211a is provided with two grooves 1211a1 and 1211a2, and the second contact surface 1211b is provided with two grooves 1211b1 and 1211b2.
- Two grooves 1212a1 and 1212a2 are provided on the third contact surface 1212a. These groove portions 1211a1, 1211a2, 1211b1, 1211b2, 1212a1, and 1212a2 are respectively used for injection of an adhesive (adhesive member).
- FIG. 3 is an enlarged perspective view of the periphery of the third contact surface 1212a.
- 4A and 4B are a plan view and a front view of a state where the third contact plate 125 is bonded to the third contact surface 1212a
- FIG. 4C is a third view of the third contact surface 1212a. It is a front view in the state where contact plate 125 is not pasted up. Since the first contact surface 1211a and the second contact surface 1211b have the same structure as the third contact surface 1212a, description thereof is omitted.
- the third contact surface 1212 a is a concave bottom surface provided on the side surface of the second protrusion 1212, and the depth corresponds to the reference thickness of the third contact plate 125. (At least a part of it is embedded).
- the third contact plate 125 is bonded to the third contact surface 1212a so as to be embedded.
- the grooves 1212a1 and 1212a2 opened at the upper end (the edge of the third contact surface 1212a) extend downward (on the contact surface) as shown in FIG. 4C. 1212a).
- the surface (hatched portion) of the third contact surface 1212a is formed in a shape (non-smooth surface) having a fine undulation with roughness, and the third contact plate 125 is formed on the third contact surface 1212a. Even in the case of contact, a minute gap is generated.
- the roughness having a maximum height Rz (Rmax) of about 6.3 s is used, but is not limited thereto.
- the adhesive When the adhesive is injected from the open ends of the grooves 1212a1 and 1212a2 in a state where the third contact plate 125 is in contact with the third contact surface 1212a, the adhesive is not only inside the grooves 1212a1 and 1212a2, The third abutting plate 125 is adhered to the third abutting surface 1212a on the substantially entire surface without the thickness of the adhesive layer by spreading through a minute gap due to the capillary phenomenon.
- the third contact plate 125 has a substantially rectangular parallelepiped shape, and the third contact plate 125 can be formed to be slightly smaller than the size of the concave portion forming the third contact surface 1212a.
- the third contact plate 125 can contact with a sufficient margin in the concave portion forming the third contact surface 1212a. Therefore, the bonding operation can be easily performed.
- a surface (side surface) perpendicular to the third contact surface 1212a of the third contact plate 125 has a curved surface shape with rounded corners (having no ridge angle).
- the adhesive transmitted through the gap between the side surface of the third contact plate 125 and the side surface of the concave portion forming the third contact surface 1212a is spread by the lower end of the third contact plate 125. Prevent further transmission down.
- the third contact plate 125 is bonded with the upper ends of the grooves 1212a1 and 1212a2 facing upward in the direction of gravity, and the third contact plate 125 is bonded with the top and bottom reversed. In this case, the positional relationship between the open and closed portions of the groove portions 1212a1 and 1212a2 may be switched.
- the third contact plate 125 has a symmetrical shape with respect to the up and down direction, the left and right direction, and the front and back sides (the side bonded to the third contact surface 1212a and the exposed side), so that any orientation is achieved. It may be adhered to. Further, since the first contact surface 1211a, the second contact surface 1211b, and the third contact surface 1212a have the same shape, a common member can be used for the contact plates 123 to 125.
- the attachment operation to the fixing member 200 including the method for manufacturing the inkjet head 1 of the present embodiment will be described.
- the amount of deviation from the reference position of the recording unit support member 121 when the nozzle positions are aligned is measured and adjusted by the contact plates 123 to 125 corresponding to the measured values.
- the performed inkjet head 1 is simply attached to the fixing member 200.
- the displacement amount does not need to be directly measured with respect to the fixing member 200.
- the displacement of the recording unit support member 121 when the position of the recording unit 11 (nozzle) is aligned with the transparent alignment member ( (Shift amount and rotation angle).
- FIG. 5A to 5C are diagrams for explaining an example of the measurement of the deviation amount.
- the transparent alignment member 500 is provided with pins 511 and 512 having the same positional relationship and shape as the first pin 201 and the second pin 202 provided on the fixing member 200.
- the first contact surface 1211a, the second contact surface 1211b, and the third contact surface 1212a of the ink jet head 1 are brought into contact with these pins 511 and 512, and predetermined alignment marks 513 and 514 are set in advance.
- the deviation between the positions of the two nozzle openings is calculated, and the necessary thicknesses of the contact plates 123 to 125 are calculated based on the deviation amounts.
- the alignment member 500 a member having a sufficiently small expansion / contraction deformation is used, and it is preferable that the measurement is performed under a certain environment.
- the number of alignment marks and the number of nozzle openings that measure misalignment between them can be any number greater than or equal to two.
- the alignment mark 5001, 502 is provided on the transparent alignment member 500, and the inkjet head 1 from the back side is arranged with these alignment marks 501, 502 and the reference position mark 111c. , 111d may be placed so as to coincide with each other.
- the alignment member 500 is provided with reference lines 503, 504, and 505.
- FIG. 5C shows an enlarged view of the portion of the second protrusion 1212 in the inkjet head 1 placed on the alignment member 500.
- the third contact surface 1212a is deviated by a width dT from the reference line 505 in the outward direction of the second protrusion 1212.
- a scale may be provided before and after the reference line 505 so that the deviation amount can be read based on the scale.
- a thickness corresponding to the amount of deviation (adjusts the amount of positional deviation), that is, a third abutting plate 125 having a width dT thicker than a reference thickness is selected and bonded to the third abutting surface 1212a.
- the contact position between the second pin 202 and the third contact plate 125 is determined so that the nozzle arrangement is at a correct position (angle) with respect to the member 200. Similar measurements are performed on the first contact surface 1211a and the second contact surface 1211b, and the thicknesses of the first contact plate 123 and the second contact plate 124 are selected.
- the amount of displacement of the first contact surface 1211a, the second contact surface 1211b, and the third contact surface 1212a is directly measured, but the position of another part of the recording unit support member 121 is measured.
- the necessary thicknesses of the contact plates 123 to 125 may be calculated from the amount of deviation between the measurement position and the reference position.
- a plurality of types of contact plates 123 to 125 are prepared in advance in a predetermined step, for example, in a range assumed in advance at intervals of 1 ⁇ m, and those having a selected thickness are used as they are.
- a contact plate having a predetermined thickness (for example, the thickest within an assumed range) can be appropriately cut and used as a selected thickness.
- FIG. 6 is a flowchart showing the procedure of the head attachment adjustment process of the inkjet head 1 of the present embodiment.
- step S11 the amount of deviation from the reference position of the recording unit support member 121 when the nozzle positions are aligned is measured.
- the measurement of the deviation amount is not performed with respect to the fixed member 200.
- the positional deviation of the recording unit support member 121 when the recording unit 11 (nozzle) is aligned with the transparent alignment member. are measured.
- the displacement amounts from the reference positions of the first contact surface 1211a, the second contact surface 1211b, and the third contact surface 1212a are calculated. Then, the first contact plate 123, the second contact plate 124, and the third contact plate 125 having thicknesses corresponding to the deviation amount are selected (step S12).
- the selected first contact plate 123, second contact plate 124, and third contact plate 125 are respectively connected to the first contact surface 1211a, the second contact surface 1211b, and the third contact via an adhesive. Bonded to the surface 1212a (step S13). Any adhesive may be used as long as it has sufficient fluidity when injected into each groove. For example, a thermosetting adhesive is used, and a spring or the like is attached to the contact plate 123-125.
- the recording unit supporting member 121 is heated after or while injecting the adhesive into the groove in a state where the recording unit is in close contact.
- the inkjet head 1 is fixed to the fixing member 200 by the screw 211 inserted into the screw hole 1211c while the first contact plate 123 and the second contact plate 124 are in contact with the first pin 201. And temporarily fix.
- the inkjet head 1 is rotated to bring the third contact plate 125 into contact with the second pin 202, and the inkjet head 1 is temporarily fixed to the fixing member 200 with the screw 212 inserted into the screw hole 1212c.
- step S14 the inkjet head 1 is permanently fixed to the fixing member 200 with the screws 211 and 212 (step S14). Thereby, the attachment of the inkjet head 1 to the correct position is completed.
- the first contact plate 123, the second contact plate 124, and the third contact plate 125 are connected to the first and second pins 201 to 125 by the first contact plate 123, the second contact plate 124, and the third contact plate 125 according to the pre-measured displacement. Since it is fixed at an accurate position simply by making it come into contact with 202, it is not necessary to perform adjustment work related to fine positioning on the fixing member 200 again.
- [Modification] 7A and 7B are diagrams showing a modification example relating to the arrangement of the contact plates 123 to 125.
- FIG. 7A In order to uniquely determine the position of the inkjet head 1 with respect to the fixing member 200, three parameters of two components indicating the coordinates of a predetermined position in a plane parallel to the fixing surface of the fixing member 200 and a rotation angle (direction) are determined. It ’s fine. Therefore, for example, as shown in FIG. 7A, the arrangement angle of the first contact plate 123 and the second contact plate 124, the direction of the third contact plate 125, and the like can be determined as appropriate.
- the first contact plate 123 and the second contact plate 124 may be brought into contact with separate pins 201a and 201b.
- the effect of saving space is reduced by one pin.
- FIG. 8 is a schematic bottom view of an inkjet head unit 100 according to another modification.
- each inkjet head 1 (an inkjet head unit including a single inkjet head) is attached to the fixing member 200.
- a plurality of inkjet heads 1a are connected to the inkjet head unit 100.
- the same adjustment may be performed for attachment of the inkjet head unit 100 to the fixing member 200 in some cases.
- the inkjet head unit 100 By adjusting the attachment position and direction (angle) of the fixing member 200, all the inkjet heads 1a can be attached to the fixing member 200 at the correct position and direction.
- first abutment plate 123, the second abutment plate 124, and the The three abutting plates 125 are bonded, and the fixing member 200 is attached to an accurate position.
- the inkjet head 1 which is the inkjet head unit of the present embodiment includes the recording unit 11 provided with the nozzles that eject ink, and the recording unit support member 121 that holds the recording unit 11 in a predetermined positional relationship.
- the recording unit support member 121 includes three abutting surfaces (first abutting surfaces) for determining a fixing position and a fixing angle with respect to the fixing member 200 in a plane parallel to the nozzle opening surface 11a provided with the nozzle openings.
- 123 to 125 are bonded.
- the recording plate support member 121 may be fixed to the fixing member 200 as it is after the contact plates 123 to 125 are bonded in advance based on the deviation amount measured in advance, It is not necessary to perform alignment in a narrow space on the fixing member 200, and it is possible to reduce the trouble of adjustment related to alignment.
- the adjustment is performed again on the fixing member 200 each time.
- the labor is reduced, and the replaced inkjet head 1 can be easily fixed on the fixing member 200 at an appropriate position and angle.
- the structural error can be suppressed smaller than when the inkjet head 1 is fixed to the fixing member 200 with an adjusting screw, the accuracy can be maintained and improved.
- the measurement can be performed relatively easily because it can be measured in a situation where other surrounding inkjet heads 1a and other components are not fixed. It is. Further, by adhering with an adhesive, it is possible to prevent the trouble that the screw is loosened and re-adjusted after the start of use. Further, it is not necessary to provide a mechanism such as a screw for adjusting the position of the recording support member 121 with respect to the fixing member 200 on the fixing member 200, and the nozzle can be accurately arranged while saving space.
- groove portions 1211a1, 1211a2, 1211b1, 1211b2, 1212a1, and 1212a2 into which adhesives for adhesion to the contact plates 123 to 125 are injected are provided on the three abutting surfaces. Since the adhesive is injected into these grooves to fix the contact plates 123 to 125, an adhesive layer is formed with a thickness between the abutting surface and the contact plates 123 to 125, and the first pin 201 is formed. It is possible to prevent the contact position with the second pin 202 from being shifted.
- each of the groove portions 1211a1, 1211a2, 1211b1, 1211b2, 1212a1, and 1212a2 is opened at the edge of the abutting surface, and the other end portion is closed in the abutting surface.
- an adhesive agent can be easily inject
- the three abutting surfaces are concave bottom surfaces in which at least a part is embedded by bonding the contact plates 123 to 125.
- the contact plates 123 to 125 have a curved shape in which the side surface perpendicular to the abutting surface does not have a ridge angle. If the adhesive is provided in the recess as described above, the gap tends to flow continuously before the adhesive solidifies due to capillary action in the gap between the side surface of the recess and the contact plates 123 to 125. It is possible to prevent the adhesive from flowing out of the bonding range by spreading the film.
- At least a part of the three abutting surfaces and the abutting surfaces of the abutting plates 123 to 125, that is, the side of the three abutting surfaces, is a non-smooth surface having minute undulations.
- the adhesive injected into the grooves 1211a1, 1211a2, 1211b1, 1211b2, 1212a1, and 1212a2 is transmitted through capillarity through a minute gap on the contact surface. It is possible to adhere more stably in the range.
- the thickness adjustment is performed such that the contact plates 123 to 125 for adjusting the positional deviation amount of the recording unit 11 with respect to the recording unit support member 121 are bonded to the three abutting surfaces. Steps.
- the amount of deviation first and adhering the contact plates 123 to 125 according to the amount of deviation it is not necessary to adjust the nozzle position again when fixing to the fixing member 200. It is not necessary to provide the fixing member 200 with a position adjusting structure, and the inkjet head 1 can be fixed with high accuracy while saving space. Further, the position can be adjusted more easily than when the position is adjusted in a narrow space on the fixing member 200.
- each measurement can be performed in a situation where other surrounding ink jet heads are not fixed, so that the measurement is relatively easy.
- the structural error can be suppressed smaller than the case of fixing with screws, the accuracy can be maintained and improved.
- the present invention is not limited to the above-described embodiment, and various modifications can be made.
- the recording unit support member 121 holds the periphery (four sides) of the recording unit 11 so that the nozzle opening surface 11a is exposed on the bottom surface.
- maintains the surface on the opposite side to the nozzle opening surface 11a may be sufficient.
- the contact plates 123 to 125 have been described as substantially rectangular parallelepiped plates with the ridge angles on the side surfaces lowered, but a smoother curved surface, for example, a cylindrical shape, or a corner is formed. There may be five or more substantially polygonal shapes or a substantially trapezoidal shape in which each corner is not 90 degrees. Further, when the contact surface is not a concave bottom surface and there is no fear of the adhesive flowing out, a simple rectangular parallelepiped shape or the like may be used without dropping the ridge angle.
- the groove portions 1211a1, 1211a2, 1211b1, 1211b2, 1212a1, and 1212a2 are open at one end and closed at the other end. However, both may be closed.
- the adhesive can be injected with the upper surface of the groove open, and the contact plates 123 to 125 can be contacted from above to be bonded.
- the number of the groove parts was two per abutting surface, it is not limited to this. One or three or more may be used.
- the abutting surface is a non-smooth surface having minute undulations, but at least a part may be a smooth surface.
- the number of grooves can be increased, or a complicated shape having meandering, bending or branching can be formed.
- the amount of displacement of the housing 12 with respect to the fixing member 200 according to the nozzle arrangement is measured at a location separate from the fixing member 200, but even if measurement is performed on the fixing member 200. good.
- each abutting plate is bonded with a corresponding thickness one by one for each abutting surface.
- a plurality of bonded plates having a predetermined thickness are bonded. The necessary thickness may be obtained.
- the same contact plates 123 to 125 can be used together, but the corresponding ranges of size and thickness may be individually determined. Further, the contact plates 123 to 125 are not necessarily symmetrical with respect to the front and back sides and the vertical direction. For example, the contact surfaces of the contact plates 123 to 125 may be non-smooth surfaces instead of the three butted surfaces as non-smooth surfaces. In addition, the configurations, structures, operation contents, and the like described in the above embodiments can be changed as appropriate without departing from the spirit of the present invention.
- the present invention can be used for an inkjet head unit and a method for manufacturing an inkjet head unit.
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Abstract
Description
インクを吐出するノズルが設けられたインク吐出部と、
前記インク吐出部を所定の位置関係で保持する保持部と、
を備え、
前記保持部は、前記ノズルの開口部が設けられたインク吐出面に平行な面内での所定の固定部材に対する固定位置及び固定角度を定めるための3つの突き当て面を有し、
前記突き当て面には、前記インク吐出部の前記保持部に対する位置ずれ量を調整する調整板が接着されている
インクジェットヘッドユニットである。
前記突き当て面には、前記調整板との接着に係る接着部材が注入される溝部が設けられている。
前記溝部は、一方の端部が前記突き当て面の縁で開放され、他方の端部が前記突き当て面内で閉じている。
前記3つの突き当て面は、前記調整板が接着されることで少なくとも一部が埋め込まれる凹部形状の底面である。
前記調整板は、前記突き当て面に対して垂直な側面が稜角を有しない曲面形状である。
前記3つの突き当て面及び前記調整板における前記突き当て面との接着面のうち少なくとも一部は、非平滑面とされている。
インクを吐出するノズルが設けられたインク吐出部と、前記インク吐出部を所定の位置関係で保持する保持部と、を備え、前記保持部は、前記ノズルの開口部が設けられたインク吐出面に平行な面内での所定の固定部材に対する固定位置及び固定角度を定めるための3つの突き当て面を有するインクジェットヘッドユニットの製造方法であって、
前記突き当て面に対し、前記インク吐出部の前記保持部に対する位置ずれ量を調整する調整板を接着する厚さ調整ステップ
を含む。
図1は、本発明のインクジェットヘッドユニットの実施形態であるインクジェットヘッド1の外観構成を示す斜視図である。また、図2Aは、インクジェットヘッド1の平面図である。図2Bは、インクジェットヘッド1の底面図である。
図2Aでは、インクジェットヘッド1が取り付けられる固定部材200の一部を併せて示している。
すなわち、この実施形態のインクジェットヘッドユニットは、単一のインクジェットヘッド1を有し、また、このインクジェットヘッド1のみにより構成されている。
記録部11は、インクを吐出するノズルが設けられたヘッドチップなどであり、図2Bに示すように筐体12の底面から一の面(ノズル開口面11a)が露出されて固定されている。ノズル開口面11a(インク吐出面)には、複数のノズルの開口部が開口エリア111aに配列されており、各々インクを吐出する。ここでは、二次元配列された複数のノズルの開口部のうち、四隅の四つのみを示す。その他の開口部については表示を省略するが、配列パターンは適宜設定され得る。ノズル開口面11aには、ノズル配列の基準位置標識111c、111dが設けられている。
以降では、第1当接板123、第2当接板124及び第3当接板125をまとめて当接板123~125(調整板)などとも記す。また、第1当接面1211a、第2当接面1211b及び第3当接面1212aをまとめて3つの突き当て面とも記す。これら3つの突き当て面は、筐体12(記録部支持部材121)の固定部材200(第1ピン201及び第2ピン202)に対する固定位置及び固定角度を定めるのに用いられ得る。
なお、ここでは、第3当接板125は、溝部1212a1、1212a2の開放されている上端を重力方向について上側に向けた状態で接着されることを前提としており、上下を反転させて接着される場合には、溝部1212a1、1212a2の開放部分と閉じている部分との位置関係が入れ替えられても良い。
本実施形態のインクジェットヘッド1の取り付けにおいては、ノズル位置を合わせた場合における記録部支持部材121の基準位置からのずれ量を計測し、当該計測値に応じた当接板123~125により調整を行ったインクジェットヘッド1を単純に固定部材200に対して取り付ける。ずれ量は、固定部材200に対して直接計測される必要はなく、例えば、透明な位置あわせ部材に対して記録部11(ノズル)の位置を合わせた場合における記録部支持部材121の位置ずれ(シフト量及び回転角度)を計測したものである。
図5Aに示すように、透明な位置合わせ部材500には、固定部材200に設けられた第1ピン201及び第2ピン202と同一の位置関係及び形状でピン511、512が設けられている。インクジェットヘッド1の第1当接面1211a、第2当接面1211b及び第3当接面1212aをこれらのピン511、512に当接させて、位置合わせ標識513、514と予め定められた所定の2つのノズル開口部の位置とのずれを算出し、当該ずれ量に基づいて必要な当接板123~125の厚みを算出する。位置合わせ部材500には、伸縮変形の十分に小さい部材が用いられ、また、一定環境下で計測が行われることが好ましい。また、位置合わせ標識及びこれらとの位置ずれの計測を行うノズル開口部の数は、2以上の任意の数とすることができる。
図5Cには、位置合わせ部材500に載置されたインクジェットヘッド1のうち第2突起部1212の部分を拡大して示す。
ここでは、第3当接面1212aが基準線505に対して第2突起部1212の外側向きに幅dTずれていることが示されている。なお、この幅dTの計測を行う代わりに基準線505の前後に目盛を設けて目盛に基づいてずれ量を読み取り可能としても良い。このずれ量に応じた厚さ(位置ずれ量を調整する)、すなわち、基準の厚さより幅dT厚い第3当接板125が選択されて第3当接面1212aに接着されることで、固定部材200に対してノズル配列が正しい位置(角度)となるように第2ピン202と第3当接板125との当接位置が定められる。第1当接面1211a、第2当接面1211bについても同様の計測が行われて第1当接板123及び第2当接板124の厚さが選択される。
なお、ここでは第1当接面1211a、第2当接面1211b及び第3当接面1212aのずれ量を直接計測することとしたが、記録部支持部材121の他の部位の位置を計測して、当該計測位置と基準位置とのずれ量から必要な当接板123~125の厚みを算出することとしても良い。
ステップS12、S13の処理により、本実施形態のインクジェットヘッドユニットの製造方法における厚さ調整ステップが構成される。
図7A及び図7Bは、当接板123~125の配置に係る変形例を示す図である。
このインクジェットヘッド1の固定部材200に対する位置を一意に定めるには、固定部材200の固定面に平行な面内での所定位置の座標を示す二成分と回転角度(方向)の3つのパラメーターが決まれば良い。したがって、例えば、図7Aに示すように、第1当接板123及び第2当接板124の配置角度や第3当接板125の向きなどは、適宜定められ得る。
上記実施の形態では、各インクジェットヘッド1(単一のインクジェットヘッドにより構成されるインクジェットヘッドユニット)が各々固定部材200に取り付けられることとしたが、複数のインクジェットヘッド1aがインクジェットヘッドユニット100に対して配置される場合に、インクジェットヘッドユニット100の固定部材200への取り付けについて同様の調整を行うことができる場合がある。例えば、製造工程上の特性、例えば、加熱による複数のインクジェットヘッド1aの同極性でのゆがみなどにより複数のインクジェットヘッド1aがインクジェットヘッドユニット100に対して同じずれを伴う場合には、インクジェットヘッドユニット100の固定部材200への取り付け位置及び方向(角度)の調整を行うことで、全てのインクジェットヘッド1aが固定部材200に対して正しい位置及び方向で取り付けられ得る。
このように、先に計測されたずれ量に基づいて予め当接板123~125を接着してから、そのまま記録部支持部材121を固定部材200に固定すれば良いので、各インクジェットヘッド1について、固定部材200上の狭いスペースで位置合わせをする必要がなく、位置合わせに係る調整の手間を軽減することができる。また、複数のインクジェットヘッド1を当初固定部材200上に固定する場合だけでなく、固定部材200に対して固定されるインクジェットヘッド1が交換される場合に、固定部材200上で毎回調整をしなおす手間が軽減され、交換されたインクジェットヘッド1を固定部材200上に適正な位置及び角度で容易に固定することができる。また、インクジェットヘッド1を固定部材200に対して調整用のねじで固定するよりも構造上の誤差を小さく抑えられるので、精度を維持向上させることができる。
また、固定部材200上に当該固定部材200に対する記録支持部材121の位置調整を行うためのねじなどの機構を設ける必要がなく、スペースを節約しつつ、正確にノズルを配置することができる。
このように、先にずれ量を計測し、当該ずれ量に応じた当接板123~125を接着することで、固定部材200に固定する際には改めてノズル位置の調整を行う必要がないので、固定部材200に位置調整用の構成を設ける必要がなく、スペースを節約しながら高い精度でインクジェットヘッド1を固定することができる。また、固定部材200上の狭いスペースで位置調整を行うよりも容易に位置を調整することができる。固定部材200上で位置ずれ量を計測する場合であっても、周囲の他のインクジェットヘッドを固定していない状況で各々計測することができるので、計測が比較的容易である。また、ねじで固定するよりも構成上の誤差を小さく抑えられるので、精度を維持向上させることができる。
例えば、上記実施の形態では、記録部支持部材121は、記録部11を底面でノズル開口面11aを露出させるように周囲(四方)を保持することとしたが、1~3の側面で支持したり、ノズル開口面11aとは反対側の面を保持したりする構成であっても良い。
その他、上記実施の形態で示した構成、構造や動作内容などは、本発明の趣旨を逸脱しない範囲において適宜変更可能である。
11 記録部
11a ノズル開口面
111a 開口エリア
111c 基準位置標識
112~117 インク流路
12 筐体
121 記録部支持部材
122 カバー部材
122a 接続部
123 第1当接板
124 第2当接板
125 第3当接板
100 インクジェットヘッドユニット
200 固定部材
201 第1ピン
201a、201b ピン
202 第2ピン
500 位置合わせ部材
501、502、513、514 位置合わせ標識
503~505 基準線
511、512 ピン
1211 第1突起部
1211a 第1当接面
1211a1、1211a2 溝部
1211b 第2当接面
1211b1、1211b2 溝部
1211c ねじ穴
1212 第2突起部
1212a 第3当接面
1212a1、1212a2 溝部
1212c ねじ穴
Claims (7)
- インクを吐出するノズルが設けられたインク吐出部と、
前記インク吐出部を所定の位置関係で保持する保持部と、
を備え、
前記保持部は、前記ノズルの開口部が設けられたインク吐出面に平行な面内での所定の固定部材に対する固定位置及び固定角度を定めるための3つの突き当て面を有し、
前記突き当て面には、前記インク吐出部の前記保持部に対する位置ずれ量を調整する調整板が接着されている
インクジェットヘッドユニット。 - 前記突き当て面には、前記調整板との接着に係る接着部材が注入される溝部が設けられている請求項1記載のインクジェットヘッドユニット。
- 前記溝部は、一方の端部が前記突き当て面の縁で開放され、他方の端部が前記突き当て面内で閉じている請求項2記載のインクジェットヘッドユニット。
- 前記3つの突き当て面は、前記調整板が接着されることで少なくとも一部が埋め込まれる凹部形状の底面である請求項1~3のいずれか一項に記載のインクジェットヘッドユニット。
- 前記調整板は、前記突き当て面に対して垂直な側面が稜角を有しない曲面形状である請求項1~4のいずれか一項に記載のインクジェットヘッドユニット。
- 前記3つの突き当て面及び前記調整板における前記突き当て面との接着面のうち少なくとも一部は、非平滑面とされている請求項1~5のいずれか一項に記載のインクジェットヘッドユニット。
- インクを吐出するノズルが設けられたインク吐出部と、前記インク吐出部を所定の位置関係で保持する保持部と、を備え、前記保持部は、前記ノズルの開口部が設けられたインク吐出面に平行な面内での所定の固定部材に対する固定位置及び固定角度を定めるための3つの突き当て面を有するインクジェットヘッドユニットの製造方法であって、
前記突き当て面に対し、前記インク吐出部の前記保持部に対する位置ずれ量を調整する調整板を接着する厚さ調整ステップ
を含むインクジェットヘッドユニットの製造方法。
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| EP18771050.4A EP3603975B1 (en) | 2017-03-24 | 2018-03-06 | Ink jet head unit and method for manufacturing ink jet head unit |
| JP2019507513A JP6930584B2 (ja) | 2017-03-24 | 2018-03-06 | インクジェットヘッドユニット及びインクジェットヘッドユニットの製造方法 |
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| JPWO2018173734A1 (ja) | 2020-05-14 |
| EP3603975B1 (en) | 2021-04-21 |
| JP6930584B2 (ja) | 2021-09-01 |
| CN110446610A (zh) | 2019-11-12 |
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