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WO2009101653A1 - Imprimante thermique - Google Patents

Imprimante thermique Download PDF

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Publication number
WO2009101653A1
WO2009101653A1 PCT/JP2008/000213 JP2008000213W WO2009101653A1 WO 2009101653 A1 WO2009101653 A1 WO 2009101653A1 JP 2008000213 W JP2008000213 W JP 2008000213W WO 2009101653 A1 WO2009101653 A1 WO 2009101653A1
Authority
WO
WIPO (PCT)
Prior art keywords
platen roller
thermal head
scanning direction
recording paper
main scanning
Prior art date
Application number
PCT/JP2008/000213
Other languages
English (en)
Japanese (ja)
Inventor
Takaaki Kase
Ichirou Furuki
Original Assignee
Mitsubishi Electric Corporation
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 Mitsubishi Electric Corporation filed Critical Mitsubishi Electric Corporation
Priority to PCT/JP2008/000213 priority Critical patent/WO2009101653A1/fr
Priority to JP2009553287A priority patent/JPWO2009101653A1/ja
Publication of WO2009101653A1 publication Critical patent/WO2009101653A1/fr

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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
    • B41J2/315—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material
    • B41J2/32—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of heat to a heat sensitive printing or impression-transfer material using thermal 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
    • B41J25/00—Actions or mechanisms not otherwise provided for
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from 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
    • B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/30—Embodiments of or processes related to thermal heads
    • B41J2202/31—Thermal printer with head or platen movable

Definitions

  • the present invention relates to a thermal printer that performs printing on photographic paper such as thermal paper using a thermal head.
  • the thermal printer places a roll of photographic printing paper and recording paper between the thermal head and the platen roller, and presses the thermal head against the platen roller to support the printing paper and the recording paper. Thereafter, the heating element formed on the thermal head is heated while moving the photographic paper and the recording paper with a conveying roller or the like, whereby the dye of the photographic paper is transferred to the recording paper and printing is performed.
  • a thermal printer that performs color printing generally performs printing using three color printing papers of Y (yellow), M (magenta), and C (cyan).
  • Y yellow
  • M magenta
  • C cyan
  • the Y color image is transferred using the photographic paper coated with the Y color
  • the press contact between the thermal head and the platen roller is released, the recording paper is returned to the recording start position, and the photographic paper is moved to the M position.
  • the sheet is fed to the position where the color is applied, and the platen roller and the thermal head are pressed again to transfer the M-color image onto the recording paper.
  • the C color is similarly transferred, and a color image is formed on the recording paper.
  • the transfer order of the Y, M, and C colors is not limited to the above, and may be different.
  • the heating element formed on the thermal head is located in the nip range that is the contact range between the thermal head and the platen roller. That is, when the thermal head and the platen roller are in pressure contact, if the heating element formed on the thermal head deviates from the nip range, the heat energy from the heating element cannot be transmitted to the photographic paper, resulting in a transfer failure.
  • Patent Document 1 As a countermeasure, in Patent Document 1, a support plate and a leaf spring are arranged on both sides of the thermal head, and the platen roller is positioned by urging the platen roller shaft using the support plate and the leaf spring.
  • the heating element row is configured to be correctly positioned in the nip range.
  • the conventional thermal printer is configured as described above, it is possible to position the heating element row on the thermal head within the nip range (sub-scanning direction), but the recording paper width direction (main scanning direction) ) Cannot be performed, and when three colors of Y, M, and C are transferred in a frame sequential manner, there is a problem that each color is color-shifted. That is, after the Y color is transferred, the recording paper is returned to the recording start position, and the photographic paper is sent to the position where the M color is applied, and the platen roller and the thermal head are pressed against each other again through the photographic paper and the recording paper. In such a case, when a deviation occurs in the main scanning direction of the thermal head, the position of the heating element in the main scanning direction with respect to the recording paper is displaced, resulting in a color shift.
  • the present invention has been made to solve the above-described problems.
  • the thermal head is positioned in the main scanning direction and the sub-scanning direction with respect to the platen roller with a simple configuration, thereby improving the image quality and reducing the size and size of the thermal head.
  • the purpose is to obtain a thermal printer that realizes the cost.
  • a thermal head that prints characters and image information on recording paper by applying heat to the photographic paper, and a shaft portion are rotatably supported to support the recording paper and the photographic paper.
  • a flange member and second biasing means for biasing one of the flange members toward the center position in the main scanning direction of the platen roller are provided.
  • the guide members provided at both ends in the main scanning direction of the thermal head are positioned on the positioning member side provided at both ends in the main scanning direction of the platen roller.
  • a first urging means that urges the platen roller, two flange members that are pivotally supported at both ends of the platen roller and abutting against the outer surface of the guide member, and one of the flange members is positioned at the center position in the main scanning direction of the platen roller. Since the second urging means that urges toward the platen is provided, the thermal head can be accurately positioned with respect to the platen roller, and an image free from transfer defects and color misregistration can be output.
  • FIG. 3 is a sectional view taken along line cc of FIG.
  • FIG. 4 is a sectional view taken along the line dd in FIG. 3.
  • FIG. 1 is a side view showing a configuration of a thermal printer according to Embodiment 1 of the present invention.
  • the thermal printer includes a platen roller 1 that is rotationally driven by a drive motor (not shown) and the like, and a thermal head 2 that is disposed to face the platen roller 1.
  • a plurality of heating elements 3 are arranged on the surface of the thermal head 2 on the side of the platen roller 1 and pressed against the outer periphery of the platen roller 1 with a predetermined pressure during printing.
  • a recording paper 4 and an ink sheet (printing paper) 5 are sandwiched between the platen roller 1 and the thermal head 2, and the recording paper 4 is pulled out from the roll-shaped recording paper roll 4 a and is cut by a cutter 6 to a predetermined length. Disconnected.
  • the ink sheet 5 is a sheet on which Y (yellow), M (magenta), and C (cyan) inks are applied in the surface order, and is stored in a roll shape in the ink sheet supply roll 5a.
  • the ink sheet is wound around the ink sheet winding roll 5b.
  • upstream transport rollers 7a and 7b and downstream transport rollers 8a and 8b for transporting the recording paper 4, and transport of the ink sheet 5, respectively.
  • An upstream guide shaft 9 and a downstream guide shaft 10 are disposed.
  • the width direction of the recording paper 4 is referred to as a main scanning direction
  • the discharge direction of the recording paper 4 is referred to as a sub-scanning direction.
  • FIG. 2 and 3 are side views showing the configuration of the positioning mechanism of the thermal printer according to Embodiment 1 of the present invention.
  • FIG. 2 shows a state in which the thermal head is pressed against the platen roller
  • FIG. 3 shows the thermal head. Is shown in a state of being separated from the platen roller.
  • 4 and 5 are diagrams showing the configuration of the positioning mechanism of the thermal printer according to the present invention.
  • FIG. 4 is a view as seen from the direction of arrow a in FIG. 2
  • FIG. 5 is from the direction of arrow b in FIG.
  • FIG. 6 is a cross-sectional view taken along the line cc of FIG. 2
  • FIG. 7 is a cross-sectional view taken along the line dd of FIG.
  • the platen roller 1 has a platen roller cored bar (shaft) 1a at the center, and both ends of the platen roller cored bar 1a are fitted into bearings (positioning members) 11 and 12 which are substantially cylindrical positioning members. Inserted. Furthermore, substantially cylindrical bearings 13 and 14 are fitted to the side plate 51 of the thermal printer, respectively, and the platen roller 1 is inserted into the bearings 13 and 14 by inserting both ends of the platen roller cored portion 1a. It is supported rotatably.
  • the thermal head 2 is held at both ends by a head support member 21.
  • the head support member 21 includes support surfaces 21a and 21b, cutout portions 21c, guide portions (guide members) 21d and 21e, and locking pieces 21f.
  • the support surfaces 21a and 21b hold the side portion of the thermal head 2 from both sides.
  • the notch 21c is provided at the tip of the support surfaces 21a and 21b extending in the sub-scanning direction.
  • the notch 21c has a substantially U shape, and is supported by being fitted to pins 52a and 52b protruding from the side plate 51 of the thermal printer.
  • the guide portions 21d and 21e extend in a direction substantially orthogonal to the sub-scanning direction, and abut on the outer rings of the bearings 11 and 12 into which the platen roller core metal portion 1a is inserted.
  • the locking piece 21f has a locking portion 21g that protrudes in the vicinity of the notch portion 21c and that can lock one end of a tension spring (first biasing means) 22 that is a biasing means.
  • the tension spring 22 locked to the locking portion 21g is stretched by being locked to the pins 53a and 53b provided on the side plate 51 at the other end.
  • the tension spring 22 urges the head support member 21 in the direction of arrow A shown in FIGS. 2 and 3, and the outer rings of the bearings 11 and 12 into which the guide portions 21d and 21e and the platen roller core metal portion 1a are inserted and inserted. Abut. Thereby, the thermal head 2 can be positioned in the sub-scanning direction with respect to the platen roller 1.
  • the pressing means 31 is pressed in the direction of arrow B by an urging means (not shown)
  • the thermal head 2 is moved to the platen roller by the urging force of the pressing spring 32 disposed between the head support member 21 and the pressing means 31. 1 is pressed.
  • a fixed flange (flange member) 41 is rotatably disposed between the bearing 11 and the bearing 13 into which the platen roller core metal portion 1 a of the platen roller 1 is inserted.
  • the fixed flange 41 has a flange portion 41 a that contacts the outer ring of the bearing 11.
  • the opening 41 b of the fixed flange 41 is in contact with the outer ring of the bearing 13.
  • a collar (sliding member) 42, a movable flange (flange member) 43, and a compression spring (second compression spring) 44 are disposed between the bearing 12 and the bearing 14 into which the platen roller core metal portion 1a is inserted.
  • the collar 42 that is inserted into the platen roller core 1a has a length shorter than the distance between the bearing 12 and the bearing 14, and can move between the bearing 12 and the bearing 14 along the axial direction of the platen roller 1. is there.
  • the collar 42 has a flange portion 42 a on the bearing 14 side. When the collar 42 moves to the bearing 14 side, the flange portion 42 a comes into contact with the outer ring of the bearing 14.
  • the movable flange 43 is rotatably inserted into the collar 42.
  • the movable flange 43 has a flange portion 43 a on the bearing 12 side.
  • the compression spring 44 is fitted on the movable flange 43, one end abuts on the flange portion 42a of the collar 42, the other end abuts on the flange portion 43a of the movable flange 43, and the collar 42 and the movable flange 43 are separated from each other. Energize to.
  • the thermal head 2 is in a state of being retracted away from the platen roller 1 as shown in FIGS.
  • the upstream conveying rollers 7a and 7b and the downstream conveying rollers 8a and 8b convey the recording paper 4 from the recording paper roll 4a, and the recording paper 4 is held between the platen roller 1 and the thermal head 2 at a position.
  • Match the recording start position At the same time, the take-up roll 5b is rotationally driven by a driving means (not shown), and the ink sheet 5 is moved so that the Y-color transfer start position of the ink sheet 5 is held between the platen roller 1 and the thermal head 2. Send it out.
  • the pressing means 31 is moved in the direction of arrow B by an urging means (not shown), and the heating element 3 formed on the thermal head 2 by the urging force of the pressing spring 32 is passed through the ink sheet 5 and the recording paper 4. Press contact with the platen roller 1.
  • the head support member 21 is urged in the direction of the arrow A by the urging force of the tension spring 22 provided on the locking portion 21g of the locking piece 21f, so that the guide portions 21d and 21e are moved to the platen roller 1 of the platen roller 1.
  • the thermal head 2 supported by the head support member 21 is positioned in the sub-scanning direction in contact with the bearings 11 and 12 fitted in the roller metal core 1a.
  • the heating element 3 can always be accurately positioned in the sub-scanning direction, so that the contact range (nip range) between the thermal head 2 and the platen roller 1 is reached. Therefore, the heat energy of the heat generating body 3 can be applied to the ink sheet 5 without loss, and good transfer can be performed.
  • the positioning of the head support member 21 in the main scanning direction will be described.
  • the outer side surface of the guide portion 21d of the head support member 21 abuts on the flange portion 41a of the fixed flange 41 fitted into the platen roller core metal portion 1a, and the outer side surface of the guide portion 21e is a movable flange fitted into the collar 42. 43 abuts. Further, since the movable flange 43 is biased in the direction away from the collar 42 by the biasing force of the compression spring 44, the collar 42 is in the direction of arrow C described in FIGS. Biased in the direction.
  • the flange portion 42a abuts against the outer ring of the bearing 14 fitted in the side plate 51 to restrict movement in the direction of arrow C, and the urging force of the compression spring 44 is movable.
  • the flange 43 is pressed in the direction of arrow D.
  • the movable flange 43 moves in the direction of arrow D and acts to move the head support member 21 in the direction of arrow D.
  • the fixing flange 41 is urged in the direction of arrow D through the guide portion 21d, and the outer peripheral surface of the opening portion 41b contacts the outer ring of the bearing 13 fitted in the side plate 51. Touch. Thereby, the movement of the head support member 21 in the arrow D direction is restricted.
  • the thermal head 2 supported by the head support member 21 is positioned in the main scanning direction.
  • the heating element 3 can always be accurately positioned in the main scanning direction. Can be prevented.
  • the movable flange 43 moves in the direction of arrow D by the urging force of the compression spring 44, and from the fixed flange 41 to the movable flange 43.
  • the distance is shorter than the outer width of the guide portions 21d and 21e of the head support member 21.
  • the taper surfaces 41c and 43b are formed on the flange portion 41a of the fixed flange 41 and the flange portion 43a of the movable flange 43, respectively, the guide portions 21d and 21e are moved when the thermal head 2 is lowered in the arrow B direction. Without riding on the flange portions of the fixed flange 41 and the movable flange 43, the movable flange 43 can be retracted in the direction of arrow C to generate a biasing force against the guide portion 21e.
  • the platen roller 1 is driven to rotate when the recording paper 4 is conveyed, but the fixed flange 41 and the movable flange 43 are not rotated due to contact resistance with the guide portions 21d and 21e. Further, the collar 42 does not rotate due to the urging force of the compression spring 44. On the other hand, since the fixed flange 41 is in contact with the outer ring of the bearings 11 and 13 and the collar 42 is in contact with the outer ring of the bearing 14, the driven rotation of the platen roller 1 is not hindered.
  • the recording paper 4 and the ink sheet 5 are moved in the direction of arrow E shown in FIG. 2 at the same speed, and the heat energy of the heating element 3 is applied to the ink sheet 5. Then, the Y color of the desired image is transferred onto the recording paper 4.
  • the ink sheet 5 conveyed with the recording paper 4 is taken up by a take-up roll 5b. Due to the friction between the thermal head 2 and the ink sheet 5 when the recording paper 4 and the ink sheet 5 are conveyed in the direction of arrow E, a force in the direction of arrow A is applied to the thermal head 2. With this force, the guide portions 21d and 21e are pressed against the bearings 11 and 12, and the positioning of the thermal head 2 in the sub-scanning direction becomes more stable.
  • the pressing means 31 is moved in the direction of arrow F shown in FIG. 3 by the urging means (not shown), and the thermal head 2 is moved away from the platen roller 1.
  • the recording paper 4 is pulled back in the direction of arrow G shown in FIG. 3 by the upstream conveying rollers 7 a and 7 b and the downstream conveying rollers 8 a and 8 b, and the recording paper 4 is held between the platen roller 1 and the thermal head 2.
  • the take-up roll 5b is rotationally driven by a driving means (not shown), and the ink sheet 5 is moved so that the M-color transfer start position of the ink sheet 5 is positioned between the platen roller 1 and the thermal head 2. Send it out.
  • the heating element 3 is pressed against the platen roller 1 through the ink sheet 5 and the recording paper 4 in the same manner as in the Y color transfer described above.
  • the thermal head 2 is lowered in the direction of arrow B, it is similarly accurately positioned in the main scanning direction and the sub-scanning direction, so that a good transfer can be obtained without causing a transfer defect or misalignment.
  • the thermal head 2 is retracted in the direction of arrow F, and the recording paper 4 is moved in the direction of arrow G by the upstream side conveyance rollers 7a and 7b and the downstream side conveyance rollers 8a and 8b. Then, the sheet is conveyed by a predetermined length and cut by the cutter 6 to complete the image recording.
  • the guide portions 21 d and 21 e of the head support member 21 are provided at both ends of the thermal head 2, and the bearings 11 and 12 are provided at both ends of the platen roller 1.
  • a tension spring 22 that urges the guide portions 21d and 21e toward the bearings 11 and 12 is supported by both ends of the platen roller 1 and abuts against the outer surfaces of the bearings 11 and 12. Since the fixed flange 41, the movable flange 43, and the compression spring 44 for urging the movable flange 43 toward the center position in the main scanning direction of the platen roller 1 are provided, a thermal head for the platen roller using a simple configuration. It is possible to perform positioning in the main scanning direction and the sub-scanning direction. As a result, it is possible to obtain a small-sized and low-cost thermal printer with good image quality.
  • the thermal printer according to the present invention enables accurate positioning of the thermal head with respect to the platen roller in the main scanning direction and the sub-scanning direction, and is suitable for use in printing of a plurality of colors.

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  • Electronic Switches (AREA)
  • Handling Of Sheets (AREA)

Abstract

L'invention porte sur une imprimante thermique, qui comprend une tête thermique (2) qui applique de la chaleur à une feuille d'encre (5) pour imprimer des caractères ou des informations d'image sur un papier d'impression (4), un cylindre d'impression (1), dans lequel une partie de barre creuse de cylindre d'impression (1a) est supportée en rotation, et qui supporte le papier d'impression (4) et la feuille d'encre (5), des parties de guidage (21d, 21e) d'un élément de support de tête (21) qui sont disposées aux deux extrémités dans la direction de balayage principale, qui est la direction d'impression de la tête thermique (2), des paliers (11, 12) disposés aux deux extrémités dans la direction de balayage principale du cylindre d'impression (1), un ressort de traction (22) pour tirer les parties de guidage (21d, 21e) vers les paliers (11, 12) lorsque la tête thermique (2) et le cylindre d'impression (1) sont comprimés en contact, une bride fixe (41) et une bride mobile (43) qui sont supportées en rotation sur les deux extrémités du cylindre d'impression (1) et qui sont en contact avec les faces externes des paliers (11, 12), et un ressort de compression (44) pour pousser la bride mobile (43) vers le centre dans la direction de balayage principale du cylindre d'impression (1).
PCT/JP2008/000213 2008-02-13 2008-02-13 Imprimante thermique WO2009101653A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2008/000213 WO2009101653A1 (fr) 2008-02-13 2008-02-13 Imprimante thermique
JP2009553287A JPWO2009101653A1 (ja) 2008-02-13 2008-02-13 サーマルプリンタ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2008/000213 WO2009101653A1 (fr) 2008-02-13 2008-02-13 Imprimante thermique

Publications (1)

Publication Number Publication Date
WO2009101653A1 true WO2009101653A1 (fr) 2009-08-20

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PCT/JP2008/000213 WO2009101653A1 (fr) 2008-02-13 2008-02-13 Imprimante thermique

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JP (1) JPWO2009101653A1 (fr)
WO (1) WO2009101653A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2327557A1 (fr) * 2009-11-30 2011-06-01 Seiko Instruments Inc. Imprimante thermique
US8610751B2 (en) * 2009-09-30 2013-12-17 Seiko Instruments Inc. Thermal printer
JP2015182311A (ja) * 2014-03-24 2015-10-22 セイコーエプソン株式会社 テープカートリッジ
IT202000016897A1 (it) * 2020-07-13 2022-01-13 Transfer Trade S R L Kit di stampa per macchina nastratrice

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03292154A (ja) * 1990-04-09 1991-12-24 Seiko Instr Inc 画像出力装置
JPH10193652A (ja) * 1997-01-09 1998-07-28 Nikon Corp 画像形成装置
JP2002031856A (ja) * 2000-07-18 2002-01-31 Fuji Photo Film Co Ltd 画像形成装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03292154A (ja) * 1990-04-09 1991-12-24 Seiko Instr Inc 画像出力装置
JPH10193652A (ja) * 1997-01-09 1998-07-28 Nikon Corp 画像形成装置
JP2002031856A (ja) * 2000-07-18 2002-01-31 Fuji Photo Film Co Ltd 画像形成装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8610751B2 (en) * 2009-09-30 2013-12-17 Seiko Instruments Inc. Thermal printer
EP2327557A1 (fr) * 2009-11-30 2011-06-01 Seiko Instruments Inc. Imprimante thermique
JP2015182311A (ja) * 2014-03-24 2015-10-22 セイコーエプソン株式会社 テープカートリッジ
IT202000016897A1 (it) * 2020-07-13 2022-01-13 Transfer Trade S R L Kit di stampa per macchina nastratrice

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