EP0308566B1 - Machine de bureau, en particulier imprimante à matrice de points, avec ajustement de l'écart entre la tête d'impression et le cylindre de frappe - Google Patents

Machine de bureau, en particulier imprimante à matrice de points, avec ajustement de l'écart entre la tête d'impression et le cylindre de frappe Download PDF

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Publication number
EP0308566B1
EP0308566B1 EP87730110A EP87730110A EP0308566B1 EP 0308566 B1 EP0308566 B1 EP 0308566B1 EP 87730110 A EP87730110 A EP 87730110A EP 87730110 A EP87730110 A EP 87730110A EP 0308566 B1 EP0308566 B1 EP 0308566B1
Authority
EP
European Patent Office
Prior art keywords
print head
catch plate
plate
office machine
counter
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.)
Expired - Lifetime
Application number
EP87730110A
Other languages
German (de)
English (en)
Other versions
EP0308566A1 (fr
Inventor
Stefan Dipl.-Ing. Bischof (Fh)
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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 Mannesmann AG filed Critical Mannesmann AG
Priority to DE8787730110T priority Critical patent/DE3783135D1/de
Priority to EP87730110A priority patent/EP0308566B1/fr
Priority to AT87730110T priority patent/ATE83439T1/de
Priority to US07/248,488 priority patent/US4906115A/en
Publication of EP0308566A1 publication Critical patent/EP0308566A1/fr
Application granted granted Critical
Publication of EP0308566B1 publication Critical patent/EP0308566B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B41J25/304—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface
    • B41J25/308—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms
    • B41J25/3088—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms with print gap adjustment means on the printer frame, e.g. for rotation of an eccentric carriage guide shaft
    • 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
    • B41J25/308—Bodily-movable mechanisms for print heads or carriages movable towards or from paper surface with print gap adjustment mechanisms

Definitions

  • the invention relates to an office machine, in particular a matrix printer, with a device for setting the smallest writing distance between a print head and a platen, which has a front and a rear carriage guide axis, on which the carriage with the print head is guided in front of the platen, the front Carriage guide axis is adjustably mounted against the writing abutment in side boards, the front carriage guide axis is rotatably supported in the side boards by means of eccentrics, and an adjusting lever is fastened on the front carriage guide axis outside of a side board.
  • Such "basic settings" between a printhead and a writing abutment correspond to the functionally important distance of the printing elements, so that the distance can no longer be changed by the user in the sense of a reduction.
  • a matrix needle printhead in which the stroke of the printing needles is approximately 0.2 to 0.5 mm may serve as an example. A distance smaller than 0.2 mm would therefore no longer be possible here, regardless of the paper thickness selected by the user. After such a “basic setting" has been made in the manufacturing plant, the user can no longer set this minimum distance smaller.
  • the slide guide axis is guided in sliding blocks which are provided on the side boards of the printer frame.
  • the slide guide axis is guided towards or away from the writing abutment.
  • the slide guide axis is screwed to the side boards.
  • JP 60-154091 With a parallel setting for the print head path and the write abutment, i.e. in the sense of a constant gap between the writing abutment and the moving print head, use the design described at the outset.
  • a rough adjustment of the distance between the print head and the writing abutment is theoretically possible at the factory, while a fine adjustment of this distance can be carried out by the customer by rotating eccentrically mounted rollers.
  • a disadvantage of this type of coarse and fine adjustment is that the customer can not only go above or below the distance set in the factory by rotating the eccentric rollers.
  • the object of the invention is to reduce the number of simple parts when designing them, to achieve simple assembly and quick and reliable adjustment.
  • the actuating lever is assigned a latching plate on the side board, which has a rear and a front stop for the actuating lever and that the latching plate tips around after releasing a lock between the latching plate and side board
  • Angle about the horizontal axis of the front carriage guide is adjustable in a guide, the position of the front stop corresponds to the minimum distance of the printhead from the abutment.
  • only a single component, namely the locking plate is required, which combines several functions.
  • the locking plate can be attached as a compact part in the side board with little effort, it can be made adjustable and self-locking.
  • the stops can also already be part of the locking plate.
  • This locking plate can now be used in two functions: On the one hand, the basic setting mentioned is carried out by moving the locking plate, and on the other hand, by moving the adjusting lever, the user can still determine the distance between the print head and the abutment according to the number of layers of paper used. Nevertheless, a minimum distance, the so-called basic setting to the abutment, is guaranteed.
  • the locking plate is clipped into the respective side plate. Such a fastening design nevertheless allows the locking plate to be adjusted in the guide mentioned.
  • the locking plate has a radial toothing for the paper thickness adjustment on the end face and that the radial toothing has at least one locking tooth on the adjusting lever opposite.
  • the locking plate therefore takes over the function of setting the paper thickness for the user.
  • the locking between the side plate and the locking plate is formed from a toothing provided on a boundary edge of an arcuate opening in the side plate and a counter toothing provided on the locking plate, the counter toothing being arranged on a resilient lever part of the locking plate.
  • the lock can therefore be released and re-engaged with the simplest of means.
  • a printer frame consists of side boards 1 and 2, between which a writing abutment 3 and a front carriage guide axis 4 and a rear carriage guide axis 5 are fastened.
  • the carriage 6 is moved back and forth with a rope or belt 9 by means of a rope or belt drive 8.
  • the printhead 7 is located with the printing elements at a basic distance 10 from the surface of the recording medium which is currently resting on the abutment 3.
  • the front slide guide axis 4 is fastened in the side boards 1, 2 by means of eccentrics 11 (FIG. 2).
  • an adjusting lever 12 is rotatably attached.
  • a locking plate 13 is attached to the wall surface of the side board 1.
  • the locking plate 13 can be made of a one-piece plastic part plasticizable plastic injection molded.
  • a rear stop 14 and a front stop 15 are integrally formed on the locking plate 13.
  • a lock 16 which will be described in more detail below, is provided, the effect being extended to an acute angle 17.
  • the locking plate 13 is pivotable about the horizontal axis 11a of the slide guide axis 4 in a guide 18.
  • the guide 18 is formed here in each case by pins 19 which are also integrally formed on the locking plate 13 and elongated holes 20 in the side plate 1 (or 2).
  • the locking plate 13 is clipped into the respective side plate 1 or 2, the pins 19 being further developed into radially resilient pressure pins 21 (FIG. 5).
  • the locking plate 13 also has a radial toothing 22 for the paper thickness adjustment, here the adjusting lever 12 is moved in the directions 23 and 24 if the user wants to readjust the distance of the print head 7 from the paper surface on the abutment 3. Because of the larger adjustment path for different paper thicknesses, this radial toothing 22 is dimensioned correspondingly larger (FIG. 3).
  • the radial toothing 22 is located on the end face 25 of the locking plate 13; Opposite there is at least one locking tooth 26 on the actuating lever 12 (FIG. 4).
  • the lock 16 mentioned is constructed as follows: In the side board 1 (or 2) there is an opening 27 with a boundary edge 28 which forms a toothing 29. A single tooth as drawn is sufficient here.
  • counter teeth 30 are attached to the locking plate 13.
  • the counter-toothing 30 is provided on a resilient lever part 31 of the locking plate 13, the spring action in the plastic part being brought about by an elongated slot 32.
  • the actuating lever 12 When the smallest writing distance 10 is set, the actuating lever 12 is not moved. Rather, the lock 16 mentioned is moved in the direction 34 by means of a screwdriver 33 (FIG. 4), which is supported by an opening 33a on the actuating lever 12, as a result of which the counter toothing 30 in the locking plate 13 is raised in the direction 35 via the resilient lever part 31 and the lock is released.
  • the locking plate 13 in its guide 18 can be adjusted as desired to the smallest writing distance 10 between the print head 7 and the platen 3, the corresponding functional movement of the print head 7, e.g. can also be a thermal print head is taken into account.
  • Fig. 5 shows the unlocked state as Fig. 4. This setting of the smallest writing distance 10 is therefore carried out completely independently of the setting of the paper thickness with the aid of the adjusting lever 12.

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  • Common Mechanisms (AREA)

Claims (4)

  1. Machine de bureau, en particulier une imprimante matricielle, comportant un dispositif pour le réglage du plus petit intervalle d'écriture (10) entre une tête d'impression (7) et une butée d'écriture (3), présentant un axe avant et un axe arrière de guidage du chariot (4,5), sur lesquels est guidé le chariot (6) avec la tête d'impression (7) devant la butée d'écriture (3), l'axe avant de guidage du chariot (4) étant logé dans des platines latérales (1,2) contre la butée d'écriture (3), de façon à pouvoir être réglé, l'axe avant de guidage du chariot (4) étant à chaque fois logé dans les platines latérales (1,2) à l'aide d'excentriques (11) de façon à pouvoir tourner, et un levier de manoeuvre (12) étant fixé sur l'axe avant de guidage du chariot (4) à l'extérieur d'une platine latérale (1 ; 2),
    caractérisée en ce qu'une plaque d'encliquetage (13) est associée au levier de manoeuvre (12) sur la platine latérale (1 ; 2), qui présente un appui avant et un appui arrière (14,15) pour le levier de manoeuvre (12), et en ce que, après le déverrouillage d'un dispositif de verrouillage (16) entre la plaque d'encliquetage (13) et la platine latérale (1 ; 2), la plaque d'encliquetage (13) peut être réglée, dans un guide (18), d'un angle aigu (17), autour de l'axe horizontal (11a) de l'axe avant de guidage du chariot (4), la position de l'appui avant (15) correspondant à l'écart minimal entre la tête d'impression (7) et la butée d'écriture (3).
  2. Machine de bureau selon la revendication 1,
    caractérisée en ce que la plaque d'encliquetage (13) est fixée dans la platine latérale correspondante (1 ; 2).
  3. Machine de bureau selon les revendications 1 ou 2,
    caractérisée en ce que la plaque d'encliquetage (13) présente une denture radiale (22) sur la surface frontale (25) pour le réglage de l'épaisseur du papier et en ce qu'au moins une dent d'encliquetage (26) du levier de manoeuvre (12) se trouve en regard de la denture radiale (22).
  4. Machine de bureau selon une ou plusieurs des revendications 1 à 3,
    caractérisée en ce que le dispositif de verrouillage (16) entre la platine latérale (1 ; 2) et la plaque d'encliquetage (13) est constitué d'une denture (29) prévue sur le bord de limitation (28) d'une ouverture en forme d'arc (27), dans la platine latérale (1 ; 2), et d'une contre-denture (30) prévue sur la plaque d'encliquetage (13), la contredenture (30) étant agencée sur une partie de levier élastique (31) de la plaque d'encliquetage (13).
EP87730110A 1987-09-23 1987-09-23 Machine de bureau, en particulier imprimante à matrice de points, avec ajustement de l'écart entre la tête d'impression et le cylindre de frappe Expired - Lifetime EP0308566B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE8787730110T DE3783135D1 (de) 1987-09-23 1987-09-23 Bueromaschine, insbesondere matrixdrucker, mit druckkopf/schreibwiderlager-abstandsjustage.
EP87730110A EP0308566B1 (fr) 1987-09-23 1987-09-23 Machine de bureau, en particulier imprimante à matrice de points, avec ajustement de l'écart entre la tête d'impression et le cylindre de frappe
AT87730110T ATE83439T1 (de) 1987-09-23 1987-09-23 Bueromaschine, insbesondere matrixdrucker, mit druckkopf/schreibwiderlager-abstandsjustage.
US07/248,488 US4906115A (en) 1987-09-23 1988-09-23 Apparatus for adjusting the minimum print heat to platen spacing in a printer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87730110A EP0308566B1 (fr) 1987-09-23 1987-09-23 Machine de bureau, en particulier imprimante à matrice de points, avec ajustement de l'écart entre la tête d'impression et le cylindre de frappe

Publications (2)

Publication Number Publication Date
EP0308566A1 EP0308566A1 (fr) 1989-03-29
EP0308566B1 true EP0308566B1 (fr) 1992-12-16

Family

ID=8198363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87730110A Expired - Lifetime EP0308566B1 (fr) 1987-09-23 1987-09-23 Machine de bureau, en particulier imprimante à matrice de points, avec ajustement de l'écart entre la tête d'impression et le cylindre de frappe

Country Status (4)

Country Link
US (1) US4906115A (fr)
EP (1) EP0308566B1 (fr)
AT (1) ATE83439T1 (fr)
DE (1) DE3783135D1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8814238U1 (de) * 1988-11-14 1990-03-22 Siemens Nixdorf Informationssysteme AG, 33106 Paderborn Druckvorrichtung
DE3909254A1 (de) * 1989-03-21 1990-09-27 Esselte Meto Int Gmbh Thermodruckkopf
US5000590A (en) * 1989-06-29 1991-03-19 Itt Corporation Print head adjustment mechanism
US5187497A (en) * 1989-09-18 1993-02-16 Canon Kabushiki Kaisha Ink jet recording apparatus having gap adjustment between the recording head and recording medium
US5293531A (en) * 1991-08-23 1994-03-08 Eastman Kodak Company Writing translator mount
JP3087442B2 (ja) * 1992-04-10 2000-09-11 ブラザー工業株式会社 印字装置
JP3655345B2 (ja) * 1995-04-12 2005-06-02 シチズン時計株式会社 インパクトドットプリンタのギャップ調整装置
JP3326780B2 (ja) * 1995-04-28 2002-09-24 セイコーエプソン株式会社 プリンタ
US5943917A (en) * 1997-10-16 1999-08-31 Honeywell Inc. Thermostat having a temperature setting lever with tactilely determinable position
US6027264A (en) * 1998-02-16 2000-02-22 Hewlett-Packard Company Fixtureless, accurate system and assembly method for controlling pen-to-paper spacing in an inkjet printer
US6450710B1 (en) 2000-07-14 2002-09-17 Lexmark International, Inc. Frame system for an ink jet printer
US6637958B2 (en) * 2000-10-30 2003-10-28 Vutek, Inc. Printing system with adjustable carriage rail support
DE10259569A1 (de) * 2002-12-19 2004-07-01 Hilti Ag Elektrohandwerkzeugmaschine mit kontaktlosem elektrischen Handschalter
JP4727292B2 (ja) * 2005-05-12 2011-07-20 東芝テック株式会社 サーマルプリンタ
JP4508937B2 (ja) * 2005-05-12 2010-07-21 キヤノン株式会社 記録装置
US7976231B2 (en) * 2007-12-13 2011-07-12 International Business Machines Corporation Method and apparatus for adjusting a gap in a printer

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3960256A (en) * 1974-10-21 1976-06-01 Digital Equipment Corporation Adjustable carriage apparatus
US4178106A (en) * 1977-11-25 1979-12-11 General Electric Company Print gap adjust mechanism for printers
US4268177A (en) * 1978-11-01 1981-05-19 Plessey Peripheral Systems Paper thickness adjusting mechanism for impact printer
US4286888A (en) * 1978-12-28 1981-09-01 Centronics Data Computer Corp. Bi-directional belt drive, print head mounting means and printing plane adjustment means for serial printers
DE3008539C2 (de) * 1980-03-06 1982-05-27 Triumph-Adler Aktiengesellschaft für Büro- und Informationstechnik, 8500 Nürnberg Verstelleinrichtung des Aufzeichnungsträgeraggregates an Schreib- u.ä. Büromaschinen
JPS60154091A (ja) * 1984-01-23 1985-08-13 Tokyo Electric Co Ltd プリンタの印字ヘツドギヤツプ調整装置
JPS61213178A (ja) * 1985-03-19 1986-09-22 Tokyo Electric Co Ltd 印字装置
IT1187968B (it) * 1986-03-11 1987-12-23 Olivetti & Co Spa Stampante seriale a punti con carrello portatestina mobile
DE3608001A1 (de) * 1986-03-11 1987-09-24 Mannesmann Ag Einrichtung zum verstellen des abstandes zwischen druckkopf und schreibwiderlager eines druckers, insbes. eines matrixdruckers

Also Published As

Publication number Publication date
US4906115A (en) 1990-03-06
DE3783135D1 (de) 1993-01-28
EP0308566A1 (fr) 1989-03-29
ATE83439T1 (de) 1993-01-15

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