EP2913188A2 - Tintenstrahldruckkopf, Tintenstrahlaufzeichnungsvorrichtung und Verfahren zur Anpassung der Position eines Tintenstrahldruckkopfes - Google Patents

Tintenstrahldruckkopf, Tintenstrahlaufzeichnungsvorrichtung und Verfahren zur Anpassung der Position eines Tintenstrahldruckkopfes Download PDF

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Publication number
EP2913188A2
EP2913188A2 EP15153164.7A EP15153164A EP2913188A2 EP 2913188 A2 EP2913188 A2 EP 2913188A2 EP 15153164 A EP15153164 A EP 15153164A EP 2913188 A2 EP2913188 A2 EP 2913188A2
Authority
EP
European Patent Office
Prior art keywords
inkjet printhead
positioning member
projection
positioning
frame
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.)
Granted
Application number
EP15153164.7A
Other languages
English (en)
French (fr)
Other versions
EP2913188A3 (de
EP2913188B1 (de
Inventor
Masato Ueda
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Konica Minolta Inc filed Critical Konica Minolta Inc
Publication of EP2913188A2 publication Critical patent/EP2913188A2/de
Publication of EP2913188A3 publication Critical patent/EP2913188A3/de
Application granted granted Critical
Publication of EP2913188B1 publication Critical patent/EP2913188B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/21—Ink jet for multi-colour printing
    • B41J2/2132—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding
    • B41J2/2146—Print quality control characterised by dot disposition, e.g. for reducing white stripes or banding for line print heads
    • 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
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/135—Nozzles
    • B41J2/145—Arrangement thereof
    • B41J2/155—Arrangement thereof for line printing
    • 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
    • B41J25/34—Bodily-changeable print heads or carriages
    • 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
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/19—Assembling head units
    • 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
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01—Embodiments of or processes related to ink-jet heads
    • B41J2202/20—Modules

Definitions

  • the present invention relates to an inkjet printhead, an inkjet recording apparatus, and a method for adjusting position of an inkjet printhead.
  • a typical inkjet recording apparatus includes inkjet printheads each including a nozzle-formed member having a plurality of nozzles arranged thereon in a row.
  • the inkjet printheads are mounted and held on a frame, and the nozzles eject ink onto a recording medium to form an image on the recording medium.
  • one end part of each support to support a nozzle-formed member is notched to have two contact surfaces.
  • a pair of positioning shafts are disposed upright on the inkjet printhead mounting surface of the frame, and one of the positioning shafts is held between the two contact surfaces to determine the rotation axis of the inkjet printhead, and one contact surface formed on the other end part of the support is brought into contact with the other of the positioning shafts to prevent rotation of the inkjet printhead.
  • the inkjet printhead is thus positioned and is fixed with, for example, screws in this state to be mounted to the frame (see, for example, Japanese Unexamined Patent Application Publication No. 2008-296518 ).
  • An inkjet printhead is assembled with many parts, and each part has a shaping error. Cumulative shaping errors and assembling errors result in variation in accuracy of products.
  • the inkjet printhead disclosed in Japanese Unexamined Patent Application Publication No. 2008-296518 positioned in the above-described method, may not achieve high positioning accuracy.
  • the mounting position of each inkjet printhead therefore has to be fine-tuned using positioning pins and positioning screws, leading to large cost.
  • An object of the present invention is to provide an inkjet printhead, an inkjet recording apparatus, and a method for adjusting position of an inkjet printhead that require less mounting cost.
  • an inkjet printhead reflecting one aspect of the present invention includes an inkjet printhead comprising a support to support a nozzle-formed member including a plurality of nozzles to eject ink, wherein the support includes a pair of projections at both ends of the support in a longitudinal direction, the projections being formed integrally with the support; one of the projections includes a first surface and a second surface, and the other of the projections includes a contact surface; each of the first surface, the second surface, and the contact surface includes a touch part to allow the inkjet printhead to be positioned at a first position on an inkjet printhead mounting surface of a frame on which the inkjet printhead is to be mounted; and a positioning member including a touch surface is attached to one of the projections in such a way that (i) the first surface and the touch surface of the positioning member or (ii) the second surface and the touch surface of the positioning member or (iii) two touch surfaces of the positioning member allow the
  • the positioning member includes a first touch surface and a second touch surface; and the first touch surface and the second touch surface form a V shape.
  • the positioning member is attached to an upper surface of the projection.
  • a bottom surface of at least the projection to which the positioning member is attached of the projections is in contact with the frame when the inkjet printhead is positioned on the frame.
  • the projection to which the positioning member is to be attached has the same shape as the positioning member in a plan view.
  • the positioning member has a screw insertion hole for insertion of a screw;
  • the projection to which the positioning member is to be attached has a screw receiving hole into which the screw is to be screwed;
  • the positioning member is attached to the projection in such a way that the screw is inserted through the screw insertion hole of the positioning member and is screwed into the screw receiving hole of the projection; and
  • the screw insertion hole has a diameter such that an attachment position of the positioning member with respect to the projection is selectable within a predetermined range.
  • An inkjet recording apparatus includes the above-described inkjet printhead; and the frame including a pair of positioning shafts disposed upright on the inkjet printhead mounting surface on which the inkjet printhead is to be mounted, wherein (i) the first surface and the touch surface of the positioning member are brought into contact with one of the positioning shafts or (ii) the second surface and the touch surface of the positioning member are brought into contact with one of the positioning shafts or (iii) the two touch surfaces of the positioning member hold one of the positioning shafts between the two touch surfaces, for the inkjet printhead to be supported; and the contact surface is brought into contact with the other of the positioning shafts to prevent rotation of the inkjet printhead, so that the inkjet printhead is positioned and fixed at the predetermined mounting position on the frame.
  • the frame has a recess in which the inkjet printhead fits.
  • a method for adjusting a position of an inkjet printhead reflecting another aspect of the present invention uses an inkjet printhead including a support to support a nozzle-formed member including a plurality of nozzles to eject ink, wherein the support includes a pair of projections at both ends of the support in a longitudinal direction, the projections being formed integrally with the support, one of the projections includes a first surface and a second surface, and the other of the projections includes a contact surface, each of the first surface, the second surface, and the contact surface includes a touch part to allow the inkjet printhead to be positioned at a first position on an inkjet printhead mounting surface of a frame on which the inkjet printhead is to be mounted, the method comprising.
  • the method for adjusting the position of the inkjet printhead includes placing the inkjet printhead at a predetermined mounting position on the inkjet printhead mounting surface; and positioning the inkjet printhead with (i) the first surface and a touch surface of a positioning member attached to one of the projections or (ii) the second surface and the touch surface of the positioning member or (iii) two touch surfaces of the positioning member when the inkjet printhead is at the predetermined mounting position different from the first position.
  • the present invention can reduce cost for a mounting process.
  • the inkjet recording apparatus 1 includes a platen P to hold a recording medium S. At the front and back of the platen P, conveyance rollers R1 and R2 to convey a recording medium S are disposed. When the conveyance rollers R1 and R2 are driven, a recording medium S is conveyed from the back to front while the recording medium S is supported by the platen P.
  • the conveyance direction in which a recording medium S is conveyed is sometimes referred to as "Y direction” or "front-back direction”
  • the direction perpendicular to the conveyance direction is sometimes referred to as "X direction” or "left-right direction”.
  • the X and Y directions are the directions on the horizontal plane.
  • the direction perpendicular to the X and Y directions is sometimes referred to as a vertical direction.
  • the recording printhead units 2 are arranged over the platen P from the upstream to downstream in the Y direction.
  • the recording printhead units 2 each extend in the X direction.
  • the four recording printhead units 2 eject cyan, magenta, yellow and black inks (recording material) onto a recording medium S to record an image and text on the recording medium S.
  • the number and order of arrangement of the recording printhead units 2 may be determined arbitrarily.
  • the recording material is not limited to ink but may be, for example, conductive paste.
  • each of the recording printhead units 2 has a thin-plate frame 21 extending in the left-right direction.
  • the frame 21 is rectangular in shape.
  • a plurality of inkjet printheads 200 are arranged on the frame 21 in a staggered manner in the left-right direction.
  • FIG. 2 shows only one inkjet printhead 200 on the frame 21 to simplify the explanation, but actually four inkjet printheads 200 are provided on the frame 21.
  • the recording printhead units 2 which cover the full width of a conveyed recording medium S, can form an image all over the surface of the recording medium S merely by conveying the recording medium S (i.e., without moving the recording printhead units 2).
  • the number of the inkjet printheads 200 disposed on the frame 21 is not limited to four but may be one or may be other numbers.
  • the recording printhead units 2 may eject recording material onto a recording medium S for image formation while moving back and forth in the direction (i.e., main scanning direction) perpendicular to the conveyance direction (i.e., sub-scanning direction) of a recording medium S.
  • Each frame 21 has substantially rectangular openings 22 at the positions where the inkjet printheads 200 are to be mounted so that the nozzles N of the inkjet printheads 200 face downward (see FIG. 5 ).
  • a pair of columnar positioning shafts 23a and 23b are disposed upright on the upper surface of the frame 21, i.e., disposed on both sides (right and left) of each opening 22 on the mounting surface of the inkjet printhead 200.
  • the positioning shafts 23a and 23b are for positioning of an inkjet printhead 200 when the inkjet printhead 200 is mounted.
  • the positioning shafts 23a and 23b may have any shape instead of a column, but preferably have a curved surface at least partially so that a first contact surface 203a and a second contact surface 203b of a positioning member 203 (see FIG. 3 ) can be in contact with the positioning shaft 23a or 23b at a time, as described later.
  • Mounting screw receiving holes 24a and 24b are provided near the positioning shafts 23a and 23b, respectively, into which mounting screws 205 (described later) are screwed.
  • An inkjet printhead 200 positioned at a predetermined mounting position can be fixed to the frame 21 with the mounting screws 205.
  • the inkjet printhead 200 may be fixed to the frame 21 through any other fixing means, such as gluing or welding, instead of the screws.
  • each of the inkjet printheads 200 mounted on the frame 21 will now described in detail with reference to FIGS. 3 to 7 .
  • the inkjet printhead 200 includes a cover 201 and an ink ejection section 202.
  • the cover 201 is a protector to contain a circuit board to control the ink ejection from the nozzles N and a connector CN connected to the circuit board.
  • the upper surface of the cover 201 has an insertion opening 201b through which the connector CN is to be inserted.
  • the cover 201 is provided with locking pieces 201a at the lower ends on both sides (right and left) of the cover 201.
  • the ink ejection section 202 includes a casing 202a on which the cover 201 is mounted.
  • the casing 202a is made of, for example, aluminum and is formed through die casting.
  • the casing 202a is hollow, substantially in a box shape with its bottom open, and elongated in the left-right direction.
  • the casing 202a contains a head chip to eject ink from the nozzles N, a manifold to introduce ink to channels of the head chip, and a wiring substrate connected to the head chip, for example.
  • a cap member 202d (see FIG. 5 ) is provided so as to cover the open bottom of the casing 202a.
  • the cap member 202d is substantially rectangular in shape elongated in the left-right direction.
  • the cap member 202d has an opening 202da for nozzles roughly in its center to expose the nozzle plate 202c at the bottom.
  • the nozzle plate 202c has a rectangular nozzle-formed area NA to face the opening 202da for nozzles.
  • the nozzle-formed area NA includes one or more nozzle rows each including multiple nozzles N arranged in the left-right direction.
  • the nozzle plate 202c serves as a nozzle-formed member.
  • the casing 202a serves as a support to support the nozzle-formed member.
  • the upper surface of the casing 202a has an opening, and a pair of locking holes 202b are provided on both sides (right and left) of the opening.
  • the opening of the casing 202a is covered with the cover 201, and a pair of locking pieces 201a of the cover 201 are locked together with the locking holes 202b of the casing 202a, respectively, thereby attaching the cover 201 to the casing 202a.
  • Upright ink ports 202e are disposed on the upper surface of the casing 202a on both sides (right and left) of the opening of the casing 202a.
  • the ink ports 202e are connected to an ink supply section (not shown) to let ink from the ink supply section flow to the manifold.
  • Projections 202f and 202g are provided at right and left ends of the casing 202a, each of the projections 202f and 202g projecting laterally and formed integrally with the casing 202a.
  • Each of the projections 202f and 202g has a predetermined thickness ranging from the almost center part to the upper part of the casing 202a in the height direction.
  • At least the upper and lower surfaces of each of the projections 202f and 202g are flat surfaces. The lower surfaces of the projections 202f and 202g are in contact with the upper surface of the frame 21 when the inkjet printhead 200 is mounted on the frame 21.
  • the heat generated by driving of the inkjet printhead 200 can be released from the casing 202a to the frame 21 through the projections 202f and 202g.
  • At least one of the projections 202f and 202g having flat upper and lower surfaces can achieve excellent heat release effects.
  • the projection 202f to which a later-described positioning member 203 is to be attached, has flat upper and lower surfaces, it achieves better heat release effects and is preferable. This reduces unevenness in temperature.
  • the projections 202f and 202g are formed integrally with the casing 202a in this embodiment, the projections 202f and 202g are excellent in strength and heat conductivity, achieving excellent heat release effects.
  • the projection 202f is disposed at the right end of the casing 202a and is substantially in a box shape.
  • the right side of the projection 202f has a notch having a V shape in a plan view.
  • the inner surfaces of the notch constitute a first surface 202fa and a second surface 202fb.
  • the first surface 202fa and the second surface 202fb are continuous with each other and form a predetermined angle (e.g., 90°).
  • the projection 202f has a plate attachment screw receiving hole 202h, into which a plate attachment screw 204 (described later) is to be screwed, and a mounting screw insertion hole 202i, which is in front of the plate attachment screw receiving hole 202h and into which a mounting screw 205 (described later) is to be inserted (see FIGS. 7A and 8 ).
  • the angle of the notch formed in the projection 202f is not limited to 90° but may be set to any other angle appropriately.
  • a flat-plate positioning member 203 is provided on the upper surface of the projection 202f.
  • the positioning member 203 has substantially the same shape as the projection 202f in a plan view. Specifically, the positioning member 203 has a V-notch at its right edge, and the thickness of the V-notch forms a first contact surface 203a and a second contact surface 203b. In this embodiment, the first contact surface 203a and the second contact surface 203b constitute a touch surface.
  • the positioning member 203 has a plate attachment screw insertion hole 203c, into which the plate attachment screw 204 is to be inserted, and a mounting screw insertion hole 203d, which is in front of the plate attachment screw insertion hole 203c and into which the mounting screw 205 is to be inserted (see FIGS.
  • the positioning member 203 is laid on the upper surface of the projection 202f, and the plate attachment screw 204 is inserted into the plate attachment screw insertion hole 203c of the positioning member 203 and is screwed into the plate attachment screw receiving hole 202h of the projection 202f.
  • the positioning member 203 is thus fixed to the projection 202f.
  • the diameter of the plate attachment screw insertion hole 203c is a little larger than that of the shank of the plate attachment screw 204, which creates clearances a1 and a2 as shown in FIG. 7B . This allows selection of the attachment position of the positioning member 203 with respect to the projection 202f within the range of the clearances a1 and a2.
  • the positioning member 203 is attached to the upper surface of the projection 202f, allowing easy positioning of the positioning member 203. Further, when the positioning member 203 is no longer necessary after the inkjet printhead 200 is fixed to the frame 21, the positioning member 203 can easily be removed.
  • the projection 202g is disposed at the left end part of the casing 202a.
  • the back part of the projection 202g is cut out, and the projection 202g is in an L shape in a plan view.
  • the back surface of the cutout part of the projection 202g forms a contact surface 202ga.
  • the projection 202g has a mounting screw insertion hole 202i, into which the mounting screw 205 is to be inserted.
  • the diameter of the mounting screw insertion holes 202i provided in the right and left projections 202f and 202g is a little larger than that of the shank of the mounting screw 205. This allows the mounting position of the inkjet printhead 200 to the frame 21 to be changed.
  • the first surface 202fa and the second surface 202fb of the projection 202f are brought into contact with the positioning shaft 23a of the frame 21, and the contact surface 202ga of the projection 202g is brought into contact with the positioning shaft 23b, thereby positioning the inkjet printhead 200 at a first position.
  • the inkjet printhead 200 which has the above-described configuration, is positioned and mounted to the frame 21 at a position different from the first position in the following way.
  • the positioning member 203 is placed on the upper surface of the projection 202f of the casing 202a with the cover, and the plate attachment screw 204 is inserted into the plate attachment screw insertion hole 203c of the positioning member 203 and is screwed into the plate attachment screw receiving hole 202h in the projection 202f.
  • screwing the plate attachment screw 204 loosely to some extent so that the positioning member 203 is movable within the range of the clearances a1 and a2 makes the positioning of the positioning member 203 (described later) easier.
  • the inkjet printhead 200 is placed on the frame 21 in such a way that the lower part of the casing 202a fits in the opening 22 formed in the frame 21 at the mounting position of the inkjet printhead 200.
  • the lower surfaces of the projections 202f and 202g are in contact with the upper surface of the frame 21.
  • the first surface 202fa and the second surface 202fb of the projection 202f, and the first contact surface 203a and the second contact surface 203b of the positioning member 203 face a positioning shaft 23a of the frame 21; and the contact surface 202ga of the projection 202g faces a positioning shaft 23b of the frame 21.
  • the mounting position of the inkjet printhead 200 is fine-tuned with, for example, a microscope, while the positions of the nozzles N are being checked.
  • the positioning member 203 is brought into contact with the positioning shaft 23a in such a way that the first contact surface 203a and the second contact surface 203b of the positioning member 203 touch the positioning shaft 23a (or hold the positioning shaft 23a between the first and second contact surfaces 203a and 203b).
  • the plate attachment screw 204 is tightened to completely fix the positioning member 203 to the projection 202f to prevent the positioning member 203 from moving.
  • the positioning shaft 23a is held between the first contact surface 203a and the second contact surface 203b of the positioning member 203, and thereby the position of one end part of the inkjet printhead 200 is determined. Further, the contact surface 202ga of the projection 202g is brought into contact with the positioning shaft 23b, preventing the rotation of the inkjet printhead 200 about the vertical axis.
  • the inkjet printhead 200 is thus located on the frame 21 at a position different from the first position mentioned above. This eliminates the need for another fine adjustment of the inkjet printhead 200 and achieves easy positioning, leading to reduction in cost for the mounting.
  • the positioning member 203 provided on only one of the projections 202f and 202g is enough. This achieves downsizing of the inkjet printhead 200 with reduced number of parts, and achieves easy adjustment of the attachment position of the positioning member 203.
  • the positioning member 203 is not necessary.
  • the mounting screws 205 are inserted into the mounting screw insertion holes 202i in the projections 202f and 202g while the inkjet printhead 200 is fixed with a jig, such as a clamp, so as not to shift in position, and the mounting screws 205 are screwed into the mounting screw receiving holes 24a and 24b in the frame 21.
  • the inkjet printhead 200 is thus completely fixed to the frame 21.
  • the head parts of the mounting screws 205 press the projections 202f and 202g and give turning force about the vertical axis to the inkjet printhead 200 through the projections 202f and 202g.
  • the inkjet printhead 200 does not turn because of the pressing force of the first contact surface 203a and the second contact surface 203b of the positioning member 203 to the positioning shaft 23a and the pressing force of the contact surface 202ga of the projection 202g to the positioning shaft 23b.
  • the screwing process thus does not cause the inkjet printhead 200 to shift in position.
  • a pair of projections 202f and 202g are formed at both ends of the casing 202a in the longitudinal direction integrally with the casing 202a.
  • One of the projections 202f and 202g includes the first surface 202fa and the second surface 202fb, and the other of the projections 202f and 202g (projection 202g) includes the contact surface 202ga.
  • Each of the first surface 202fa, the second surface 202fb, and the contact surface 202ga includes a touch part to allow the inkjet printhead 200 to be located at a first position on the inkjet printhead mounting surface of the frame 21 on which the inkjet printhead 200 is to be mounted.
  • the positioning member 203 having a touch surface is attached to at least one of the projections 202f and 202g (projection 202f).
  • the positioning member 203 is attached in such a way that (i) the first surface 202fa and the touch surface (first contact surface 203a) of the positioning member 203, (ii) the second surface 202fb and the touch surface (second contact surface 203b) of the positioning member 203, or (iii) the two touch surfaces (first contact surface 203a and second contact surface 203b) of the positioning member 203 allow the inkjet printhead 200 to be positioned at a position different from the first position when the inkjet printhead 200 is at a predetermined mounting position on the frame 21.
  • the positioning member 203 includes the first contact surface 203a and the second contact surface 203b, and the first contact surface 203a and second contact surface 203b form a V shape. This enables easy adjustment of the attachment position of the positioning member 203.
  • the positioning member 203 is attached to the upper surface of the projection 202f, enabling easy adjustment of the position of the positioning member 203. Further, the positioning member 203 can be removed easily when the positioning member 203 is no longer necessary after the inkjet printhead is fixed to the frame.
  • At least the projection 202f, to which the positioning member 203 is to be attached is formed in such a way that the bottom surface of the projection 202f is in contact with the frame 21 when the inkjet printhead 200 is positioned on the frame 21. This configuration efficiently releases the heat generated by driving of the inkjet printhead to the frame.
  • the projection 202f to which the positioning member 203 is to be attached, has the same shape as the positioning member 203 in a plan view. Accordingly, if the inkjet printhead has high accuracy and can be accurately mounted on the frame, there is an option not to use the positioning member 203. This can reduce the number of parts, leading to reduction in cost for the mounting process.
  • the positioning member 203 has the plate attachment screw insertion hole 203c into which the plate attachment screw 204 is to be inserted; and the projection 202f, to which the positioning member 203 is to be attached, has the plate attachment screw receiving hole 202h into which the plate attachment screw 204 is to be screwed.
  • the plate attachment screw 204 is inserted into the plate attachment screw insertion hole 203c of the positioning member 203 and is screwed into the plate attachment screw receiving hole 202h of the projection 202f, so that the positioning member 203 is attached to the projection 202f.
  • the plate attachment screw insertion hole 203c has a diameter such that the attachment position of the positioning member 203 with respect to the projection 202f is selectable within a predetermined range. Such a configuration enables easy attachment of the positioning member 203 and easy adjustment of the attachment position of the positioning member 203.
  • the present invention is not limited to the embodiment described above, which is just an example of an inkjet recording apparatus according to the present invention.
  • the detailed configuration and operation of each function section of the inkjet recording apparatus may be modified as appropriate.
  • the positioning member 203 touches the positioning shaft 23a in such a way that the first contact surface 203a and the second contact surface 203b of the positioning member 203 are brought into contact with the positioning shaft 23a.
  • the positioning member 203 may touch the positioning shaft 23a in such a way that the first contact surface 203a of the positioning member 203 and the second surface 202fb of the projection 202f are brought into contact with the positioning shaft 23a, or in such a way that the second contact surface 203b of the positioning member 203 and the first surface 202fa of the projection 202f are brought into contact with the positioning shaft 23a.
  • the positioning member 203 is provided on one of the projections 202f and 202g (i.e., projection 202f).
  • the positioning member 203 may also be provided on the other of the projections 202f and 202g (i.e., projection 202g) so that the positioning member on the projection 202g constitutes a contact surface. This enables easy adjustment of the inkjet printhead 200 in the front-back direction.
  • the projection 202f to which the positioning member 203 is to be attached, has the same shape as the positioning member 203 in a plan view.
  • the shapes of the projection 202f and the positioning member 203 may be different from each other.
  • the projection 202f does not necessarily have to include the first surface 202fa and the second surface 202fb as long as the positioning member 203 has the first contact surface 203a and the second contact surface 203b.
  • the positioning member 203 is attached to the upper surface of the projection 202f, but may be attached to a part of the projection 202f other than the upper surface.
  • each of the projections 202f and 202g has a flat bottom surface, and the bottom surfaces of the projections 202f and 202g are in contact with the frame 21 when the inkjet printhead 200 is mounted on the frame 21.
  • the bottom surfaces are not necessarily have to be flat.
  • legs projecting downward may be provided on the bottom surface of each of the projections 202f and 202g, and the legs may come into contact with the frame 21.
  • the positioning member 203 is fixed to the projection 202f with a screw, but may be fixed with other means, such as gluing or welding.
  • the attachment position of the positioning member 203 is adjusted after the inkjet printhead 200 is mounted on the frame 21.
  • the inkjet printhead 200 may be mounted on a jig having the same configuration as the frame 21 so that the attachment position of the positioning member 203 may be adjusted, and after that the inkjet printhead 200 may be mounted to the frame 21.
  • the inkjet printhead 200 is placed on and mounted to the upper surface of the thin-plate frame 21 as described above.
  • a frame 321 shown in FIG. 10 may be used instead of the frame 21.
  • the frame 321 has recesses 321a, in which the lower parts of the inkjet printheads 200 fit, to determine the positions of the inkjet printheads 200.
  • the frame 321 is a thin plate extending in the left-right direction and having a thickness larger than that of the frame 21.
  • the upper surface of the frame 321 has recesses 321a in which the lower parts of the inkjet printheads 200 fit.
  • Each of the recesses 321a has a bottom surface 321b to support, from the bottom, an inkjet printhead 200 fitting in the recess 321a.
  • the bottom surface 321b has an opening 322 in its center part so that the nozzles N of a mounted inkjet printhead 200 face downward through the opening 322.
  • the depth of the recesses 321a may be determined to any distance.
  • the inner wall of the recess 321a has positioning bosses 323a and 323b at the right end of the inner wall and near the left end on the back side of the inner wall, respectively.
  • Each of the positioning bosses 323a and 323b has an ellipsoidal shape projecting inward and extends vertically.
  • the positioning bosses 323a and 323b have the same function as the positioning shafts 23a and 23b of the frame 21 described above and determine the mounting position of the inkjet printhead 200.
  • the shape of the positioning bosses 323a and 323b is not limited to the shape described above.
  • Mounting screw receiving holes 324a and 324b into which mounting screws 205 are to be screwed are provided near the positioning bosses 323a and 323b, respectively.
  • the frame 321 of this embodiment has the recesses 321a in which the inkjet printheads 200 fit and thereby enables more accurate and easy positioning of the inkjet printheads on the frame 321.
  • the positioning member 203 is attached to the projection 202f as described above, and then the inkjet printhead 200 is placed on the frame 321 in such a way that the casing 202a of the inkjet printhead 200 fits in the recess 321a.
  • the mounting position of the inkjet printhead 200 is then fine-tuned as described above.
  • the positioning member 203 is made to touch the positioning boss 323a in such a way that the first contact surface 203a and the second contact surface 203b of the positioning member 203 are brought into contact with the lateral surface of the positioning boss 323a.
  • the plate attachment screw 204 is then tightened to completely fix the positioning member 203 to the projection 202f.
  • the mounting screws 205 are then inserted into the mounting screw insertion holes 202i of the projections 202f and 202g and are screwed into the mounting screw receiving holes 324a and 324b of the frame 321, respectively, to fix the inkjet printhead 200 to the frame 321.
  • the projection 202f and the positioning member 203 each have a V-shaped notch.
  • the projection 202f and the positioning member 203 may have any shape as long as the two surfaces (i.e., the first surface 202fa and the second surface 202fb) can come into contact with the positioning shaft 23a.
  • inkjet printheads 200A to 200E shown in FIGS. 11A to 11E may be applied.
  • the inkjet printhead 200A includes a casing 202Aa having projections 202Af and 202Ag that are projecting laterally and are formed integrally with the casing 202Aa at the right and left ends of the casing 202Aa.
  • the projections 202Af and 202Ag are substantially in the shape of a box similarly to the projections 202f and 202g of the inkjet printhead 200 of the above-mentioned embodiment, but do not have a notch.
  • the projection 202Af is provided with a positioning member 203A attached to the upper surface of the projection 202Af.
  • the positioning member 203A has substantially the same shape (i.e., rectangular shape) as the projection 202Af in a plan view, and is a thin plate having a predetermined thickness.
  • the back surface of the positioning member 203A having such a configuration, serves as a first contact surface 203Aa, and the right end surface of the positioning member 203A serves as a second contact surface 203Ab.
  • the back surface and the right end surface of the projection 202Af serve as a first surface and a second surface, respectively, in the same manner.
  • a frame, on which the inkjet printhead 200A is to be mounted, is provided with three positioning shafts P1a, P1b, and P1c disposed upright on the upper surface of the frame, the positioning shafts P1a, P1b, and P1c corresponding to the mounting position of the inkjet printhead 200A.
  • the positioning shaft P1a is disposed at a position to face the back surface of the projection 202Af
  • the positioning shaft P1b is disposed at a position to face the right end surface of the projection 202Af
  • the positioning shaft P1c is disposed at a position to face the back surface of the projection 202Ag.
  • the first contact surface 203Aa of the positioning member 203A is brought into contact with the positioning shaft P1a and the second contact surface 203Ab of the positioning member 203A is brought into contact with the positioning shaft P1b, thereby determining the position of the positioning member 203A and allowing the projection 202Af to be held.
  • the contact surface 202Aga formed on the back surface of the projection 202Ag is brought into contact with the positioning shaft P1c, thereby allowing the projection 202Ag to be held.
  • the inkjet printhead 200A having the configuration described above, thus can be positioned on the frame.
  • the inkjet printhead 200B includes a casing 202Ba having projections 202Bf and 202Bg that are projecting laterally and are formed integrally with the casing 202Ba at the right and left ends of the casing 202Ba.
  • the projections 202Bf and 202Bg are substantially in the shape of a box similarly to the projections 202f and 202g of the inkjet printhead 200 of the above-mentioned embodiment, but each have a cutout at the back part to have an L shape in a plan view.
  • the projection 202Bf is provided with a positioning member 203B attached to the upper surface of the projection 202Bf.
  • the positioning member 203B has substantially the same shape (i.e., L shape due to the cutout) as the projection 202Bf in a plan view, and is a thin plate having a predetermined thickness.
  • the surfaces of the cutout part in the projection 202Bf serve as a first surface and a second surface, respectively, in the same manner.
  • a frame, on which the inkjet printhead 200B is to be mounted, is provided with two positioning shafts P2a and P2b disposed upright on the upper surface of the frame, the positioning shafts P2a and P2b corresponding to the mounting position of the inkjet printhead 200B.
  • the positioning shaft P2a is disposed at a position to face the lateral and back surfaces of the cutout part of the projection 202Bf
  • the positioning shaft P2b is disposed at a position to face the back surface of the cutout part of the projection 202Bg as a contact surface 202Bga.
  • the first and second contact surfaces 203Ba and 203Bb are brought into contact with the positioning shaft P2a to hold the positioning shaft P2a between the first and second contact surfaces 203Ba and 203Bb, thereby determining the position of the positioning member 203B and allowing the projection 202Bf to be held. Further, the contact surface 202Bga of the projection 202Bg is brought into contact with the positioning shaft P2b, thereby allowing the projection 202Bg to be held.
  • the inkjet printhead 200B having the configuration described above, thus can be positioned on the frame.
  • the inkjet printhead 200C includes a casing 202Ca having projections 202Cf and 202Cg that are projecting laterally and are formed integrally with the casing 202Ca at the right and left ends of the casing 202Ca.
  • the inkjet printhead 200C has the same shape as the inkjet printhead 200B described above but is different from the inkjet printhead 200B in that a first contact surface 203Ca of a positioning member 203C is the back surface of the cutout part and in that a second contact surface 203Cb is the right end surface of the positioning member 203C.
  • a frame, on which the inkjet printhead 200C is to be mounted, is provided with three positioning shafts P3a, P3b, and P3c disposed upright on the upper surface of the frame, the positioning shafts P3a, P3b, and P3c corresponding to the mounting position of the inkjet printhead 200C.
  • the positioning shaft P3a is disposed at a position to face the back surface of the cutout part of the projection 202Cf
  • the positioning shaft P3b is disposed at a position to face the right end surface of the projection 202Cf
  • the positioning shaft P3c is disposed at a position to face the back surface of the cutout part of the projection 202Cg as a contact surface 202Cga.
  • the first contact surface 203Ca of the positioning member 203C is brought into contact with the positioning shaft P3a and the second contact surface 203Cb of the positioning member 203C is brought into contact with the positioning shaft P3b, thereby determining the position of the positioning member 203C and allowing the projection 202Cf to be held.
  • the contact surface 202Cga formed on the back surface of the projection 202Cg is brought into contact with the positioning shaft P3c, thereby allowing the projection 202Cg to be held.
  • the inkjet printhead 200C having the configuration described above, thus can be positioned on the frame.
  • the inkjet printhead 200D includes a casing 202Da having projections 202Df and 202Dg that are projecting laterally and are formed integrally with the casing 202Da at the right and left ends of the casing 202Da.
  • the inkjet printhead 200D has the same shape as the inkjet printhead 200B described above.
  • a frame, on which the inkjet printhead 200D is to be mounted, is provided with three positioning shafts P4a, P4b, and P4c disposed upright on the upper surface of the frame, the positioning shafts P4a, P4b, and P4c corresponding to the mounting position of the inkjet printhead 200D.
  • the positioning shaft P4a is disposed at a position to face the lateral surface of the cutout part of the projection 202Df
  • the positioning shaft P4b is disposed at a position to face the back surface of the cutout part of the projection 202Df
  • the positioning shaft P4c is disposed at a position to face the back surface of the cutout part of the projection 202Dg as a contact surface 202Dga.
  • the first contact surface 203Da of the positioning member 203D is brought into contact with the positioning shaft P4a and the second contact surface 203Db of the positioning member 203D is brought into contact with the positioning shaft P4b, thereby determining the position of the positioning member 203D and allowing the projection 202Df to be held.
  • the contact surface 202Dga formed on the back surface of the projection 202Dg is brought into contact with the positioning shaft P4c, thereby allowing the projection 202Dg to be held.
  • the inkjet printhead 200D having the configuration described above, thus can be positioned on the frame.
  • the inkjet printhead 200E includes a casing 202Ea having projections 202Ef and 202Eg that are projecting laterally and are formed integrally with the casing 202Ea at the right and left ends of the casing 202Ea.
  • the projections 202Ef and 202Eg are substantially in the shape of a box similarly to the projections 202f and 202g of the inkjet printhead 200 of the above-mentioned embodiment, but the back part of the projection 202Ef and the front part of the projection 202Eg are cut out. That is, the projections 202Ef and 202Eg have an L shape in a plan view.
  • the projection 202Ef is provided with a positioning member 203E attached to the upper surface of the projection 202Ef.
  • the positioning member 203E has substantially the same shape (i.e., L shape due to the cutout) as the projection 202Ef in a plan view, and is a thin plate having a predetermined thickness.
  • the back surface of the cutout part of the positioning member 203E having such a configuration, serve as a first contact surface 203Ea, and the right end surface of the positioning member 203E serves as a second contact surface 203Eb.
  • back surface of the cutout part of the projection 202Ef and the right end surface of the projection 202Ef serve as a first surface and a second surface, respectively, in the same manner.
  • a frame, on which the inkjet printhead 200E is to be mounted, is provided with three positioning shafts P5a, P5b, and P5c disposed upright on the upper surface of the frame, the positioning shafts P5a, P5b, and P5c corresponding to the mounting position of the inkjet printhead 200E.
  • the positioning shaft P5a is disposed at a position to face the back surface of the cutout part of the projection 202Ef
  • the positioning shaft P5b is disposed at a position to face the right end surface of the projection 202Ef
  • the positioning shaft P5c is disposed at a position to face the front surface of the cutout part of the projection 202Eg as a contact surface 202Ega.
  • the first contact surface 203Ea of the positioning member 203E is brought into contact with the positioning shaft P5a and the second contact surface 203Eb of the positioning member 203E is brought into contact with the positioning shaft P5b, thereby determining the position of the positioning member 203E and allowing the projection 202Ef to be held.
  • the contact surface 202Ega formed on the front surface of the projection 202Eg is brought into contact with the positioning shaft P5c, thereby allowing the projection 202Eg to be held.
  • the inkjet printhead 200E having the configuration described above, thus can be positioned on the frame.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
EP15153164.7A 2014-01-31 2015-01-30 Tintenstrahldruckkopf, Tintenstrahlaufzeichnungsvorrichtung und Verfahren zur Anpassung der Position eines Tintenstrahldruckkopfes Active EP2913188B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014016798A JP6197673B2 (ja) 2014-01-31 2014-01-31 インクジェットヘッド、インクジェット記録装置及びインクジェットヘッドの位置調整方法

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EP2913188A2 true EP2913188A2 (de) 2015-09-02
EP2913188A3 EP2913188A3 (de) 2016-01-06
EP2913188B1 EP2913188B1 (de) 2021-07-14

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EP3210782A3 (de) * 2016-02-02 2017-12-27 Seiko Epson Corporation Flüssigkeitsausstosseinheit, flüssigkeitsausstosskopf, trägerkörper für flüssigkeitsausstosskopf
EP3335883A1 (de) * 2016-12-15 2018-06-20 Seiko Epson Corporation Flüssigkeitsausstosskopf und verfahren zur herstellung einer flüssigkeitsausstosskopfeinheit
CN114834157A (zh) * 2022-05-25 2022-08-02 施潘德包装印刷科技发展(北京)有限公司 一种喷头调节装置

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CN106739508B (zh) * 2017-01-16 2018-02-06 广州市裕田机械制造有限公司 喷头丝杠调节装置
EP3603975B1 (de) * 2017-03-24 2021-04-21 Konica Minolta, Inc. Tintenstrahlkopfeinheit und verfahren zur herstellung einer tintenstrahlkopfeinheit
CN108045092A (zh) * 2017-12-15 2018-05-18 深圳市微印科技有限公司 一种喷墨喷头装置
CN114953744B (zh) 2018-03-22 2023-08-04 柯尼卡美能达株式会社 喷墨头及其制造方法
JP7124866B2 (ja) 2018-05-09 2022-08-24 コニカミノルタ株式会社 インクジェットヘッド及び画像形成方法
CN113286709B (zh) 2019-01-11 2023-02-17 柯尼卡美能达株式会社 喷墨头、喷墨头的制造方法以及喷墨记录方法
JP7283198B2 (ja) 2019-04-16 2023-05-30 コニカミノルタ株式会社 樹脂の劣化度評価試験方法、それを用いた樹脂のリサイクルシステム及び樹脂劣化度評価装置
CN114206620B (zh) 2019-07-30 2023-11-10 柯尼卡美能达株式会社 喷嘴板、喷嘴板的制造方法及喷墨头
JP7485053B2 (ja) 2020-08-28 2024-05-16 コニカミノルタ株式会社 ノズルプレート及びインクジェットヘッド
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EP3210782A3 (de) * 2016-02-02 2017-12-27 Seiko Epson Corporation Flüssigkeitsausstosseinheit, flüssigkeitsausstosskopf, trägerkörper für flüssigkeitsausstosskopf
EP3466693A1 (de) * 2016-02-02 2019-04-10 Seiko Epson Corporation Flüssigkeitsausstosseinheit, flüssigkeitsausstosskopf, stützkörper für einen flüssigkeitsausstosskopf
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Also Published As

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JP2015142980A (ja) 2015-08-06
CN104816547B (zh) 2017-06-23
CN104816547A (zh) 2015-08-05
JP6197673B2 (ja) 2017-09-20
EP2913188A3 (de) 2016-01-06
EP2913188B1 (de) 2021-07-14

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