EP0174381B1 - Banc de marteaux d'impression de construction modulaire - Google Patents

Banc de marteaux d'impression de construction modulaire Download PDF

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Publication number
EP0174381B1
EP0174381B1 EP84110756A EP84110756A EP0174381B1 EP 0174381 B1 EP0174381 B1 EP 0174381B1 EP 84110756 A EP84110756 A EP 84110756A EP 84110756 A EP84110756 A EP 84110756A EP 0174381 B1 EP0174381 B1 EP 0174381B1
Authority
EP
European Patent Office
Prior art keywords
modules
print
module
print hammer
adjacent
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
Application number
EP84110756A
Other languages
German (de)
English (en)
Other versions
EP0174381A1 (fr
Inventor
Armin Bohg
Kurt Hartmann
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.)
IBM Deutschland GmbH
International Business Machines Corp
Original Assignee
IBM Deutschland GmbH
International Business Machines Corp
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 IBM Deutschland GmbH, International Business Machines Corp filed Critical IBM Deutschland GmbH
Priority to EP84110756A priority Critical patent/EP0174381B1/fr
Priority to DE8484110756T priority patent/DE3479643D1/de
Priority to JP60119899A priority patent/JPS6168272A/ja
Priority to US06/772,500 priority patent/US4651640A/en
Publication of EP0174381A1 publication Critical patent/EP0174381A1/fr
Application granted granted Critical
Publication of EP0174381B1 publication Critical patent/EP0174381B1/fr
Expired 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
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/26—Means for operating hammers to effect impression
    • B41J9/38—Electromagnetic means
    • 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
    • B41J9/00—Hammer-impression mechanisms
    • B41J9/02—Hammers; Arrangements thereof
    • B41J9/127—Mounting of hammers

Definitions

  • the invention relates to a print hammer bank in a modular design for known electromagnetic print hammer drives of the type described in the preamble of claim 1.
  • the electromagnet basically consists of essentially symmetrically constructed magnetizable yoke halves with a corresponding excitation coil (s).
  • the facing pole ends of the yoke halves form aligned magnetic working gaps.
  • a plunger which is displaceable in the direction of the alignment of the working gaps is arranged between the magnetic working gaps.
  • the cross section of the ram is adapted to the area of the working column. It can be (cylindrical or) cuboid.
  • the anchor elements contain e.g. (Disk or) cuboid anchor elements made of magnetizable material and spacing elements arranged between them made of predominantly non-magnetizable material.
  • the anchor elements have such a geometric design that their volume is in the order of magnitude of the working gap volume.
  • the armature elements are essentially in front of the working gaps when the electromagnets are not excited. When the electromagnet is excited, they are drawn into this working gap and experience an acceleration. In arrangements of this type, the plunger moves in a straight line.
  • Tongue-shaped plungers come into consideration for the present invention.
  • European patent application EP-A-0062765 describes a bench for accommodating ram units lying next to one another. These each consist of a flat, narrow frame.
  • a tongue-shaped tappet which is driven by an electromagnetic drive unit, runs within a recess in the frame.
  • the bench comprises a receiving rail and a comb-like holding rail, between which the frames are arranged. Attachments of the lower frame parts can be received by slots in the receiving rail.
  • the upper frame parts are held in incisions in the comb-like holding rail.
  • the tongue-shaped plungers are guided laterally through the electromagnetic drive units arranged on both sides of the frame and aligned with one another.
  • Such a print hammer bank has a number of disadvantages:
  • DE-A-2713514 describes a printing hammer bank in which several hammers lying next to one another, each carrying a spool, are combined to form a module.
  • the coil experiences an electromagnetic action with respect to a magnetic field formed between permanent magnets.
  • the coils are staggered; the modules are rectangular.
  • the electromagnet units assigned to the anchor bars always have a width which exceeds the width of the anchor bars or the pressure hammer ram.
  • the parallelogram-shaped modules according to the invention allow the modules to be placed against one another with almost no gaps and the gap between the plunger and the hammer being almost complete. In the area of the touching sides of two neighboring modules, the pressure hammer joints “rest” on both modules.
  • all modules both in the upper and in the lower row, have the same shape and the same geometric structure, which has significant advantages for production and maintainability.
  • Each module encapsulated in plastic, has pole faces of electromagnetic yokes arranged in columns.
  • the magnetic working gaps are formed between the aligned pole faces of the modules of an upper row of modules and the modules of a lower row of modules. Adjacent modules are interlocked.
  • a tongue-shaped plunger pressure hammer
  • Each print hammer has a series of anchor bars.
  • Each tie bar is assigned to a working gap.
  • a working gap is formed between a pole face of a module in the upper row of modules and the pole face of a module in the lower row of modules.
  • the plastic in which the modules are cast is made of a good heat-conducting material, there is very good heat dissipation in the pressure hammer bank.
  • Fig. 1 shows a schematic perspective view of an exploded view of the lower and upper row of modules of the print hammer bank with print hammers arranged side by side between them.
  • Modules 7, 8, 9, 10 of identical form are used to form the print hammer bank.
  • Adjacent modules 9 and 10 form an upper row 3 of the print hammer bank and adjacent modules 7 and 8 form a lower row 4 of the print hammer bench.
  • the upper 3 and lower 4 row of modules are spaced apart. Between them are pressure hammers arranged side by side, of which only two, 5 and 6, are shown in FIG. 1. The direction of action of the print hammers is indicated by the arrow direction D.
  • Each module 7, 8, 9, 10 has a plurality of pole faces PF of electromagnetic yokes on the side facing the pressure hammers.
  • the pole faces of the upper row of modules are aligned with the pole faces of the lower row of modules.
  • a large number of magnetic working gaps are defined by the spaced pole faces of the upper and lower row of modules. These working gaps are activated by an appropriate electromagnetic coil excitation.
  • the pole faces are arranged in columns (C).
  • each column of a module has four pole faces.
  • the print hammer (detailed illustration in FIGS. 3A and 3B) has as many soft iron webs (anchor webs) as in FIG there are working gaps defined by pole faces assigned to it; in the given embodiment also four pieces.
  • the distance between the soft iron bars in a print hammer corresponds to the distance between the working columns in the corresponding column of the print hammer bank. In the rest position of the print hammer, its soft iron webs lie in front of the working gaps assigned to them, which are formed by opposite pole faces of the modules.
  • the anchor webs of the printing hammer are drawn into the working gap and accelerated in the process, so that the printing hammer undergoes a drive movement in the printing direction D.
  • the modules of a row of modules are interlocked.
  • the upper 3 is spaced from the lower 4 module row by appropriate spacing elements to form the working gaps.
  • the modules of the top 3 and bottom 4 rows are held together by appropriate screw, rivet or similar connections.
  • Such connections can e.g. through the through-holes marked P1 / P2, P3 / P4, P5 / P6, P7 / P8.
  • a large number of connections 46 for the electromagnetic units are provided on the side of the modules facing away from the pressure hammers. The following details are given about details of the electromagnetic units, the spacing elements for the module rows, the form-fitting connection of the modules within a module row and about the structure and structure of the modules.
  • the column boundary identified by 72 is described in detail in connection with FIG. 7.
  • a module consists of a module base plate (e.g. 11 for module 7) and a part 12 connected to it, in which the electromagnet units 30 (FIG. 4) are arranged or potted with it.
  • adjacent modules are positively connected to each other in the print hammer bank.
  • bie pole faces of the modules are arranged in columns (C in Fig. 1).
  • a print hammer is assigned to each column.
  • the electromagnetic units for adjacent module gaps are offset from one another.
  • the identical form of the modules is based on a modified parallelogram. It permits a close packing density of the side-by-side pressure hammers, the anchor webs of which are also offset from one another in accordance with the pole faces (or electromagnet units) which are offset from one another in adjacent columns. If all modules of the print hammer bank are identical in shape, both in the upper and in the lower module row, the number of print hammers per module is always even.
  • FIG. 4 shows a schematic perspective illustration of an exploded drawing of a magnet coil unit. It consists of two yokes 31 and 32 arranged next to one another in a U-shape, the adjacent legs of which are encompassed by a common coil 45.
  • the coil carrier consists of a diamond-shaped base plate 50 and an upper cover plate 49. Both plates are connected to one another by two spacer elements 48 and a centrally arranged hollow body 81. The spacer elements 48 are connected beyond the base plate to contact pins 46 for the electrical connections of the coil 45.
  • the base plate 50 has openings 74 and 75 for the passage of the outer yoke legs of the pair of yoke legs 31, 32 and an opening in the region of the hollow body 81 for receiving the adjacent yoke legs of the pair of yoke legs 31, 32.
  • the cover plate 49 In the cover plate 49, four openings 41, 42, 43, 44 are provided for receiving the leg ends of the yokes 31 and 32. After inserting the yokes into the coil former and then fixing them, e.g. by casting in plastic, the yoke ends protrude slightly above the upper cover plate 49.
  • FIG. 2A and 2B show a schematic perspective illustration of a module base plate, with FIG. 2A showing the side facing the print hammers and FIG. 2B showing the side facing away from the print hammers.
  • FIG. 2B is understood to be a representation of the module base plate according to FIG. 2A rotated through 180 ° about axis 1. While a perspective top view of the module base plate is shown in viewing direction U in FIG. 2A, a top view of its underside in viewing direction B can be seen in FIG. 2B.
  • the pole faces in a column are formed by the four ends of the yokes of a pair of magnetic yokes 31, 32. These ends are labeled 31-1, 31-2, 32-1 and 32-2 in Fig. 4.
  • the electromagnet units are plugged on with the top surface 49 first on the back of the module base plates in direction B, so that the yoke ends 31-1 to 32-2 in which protrude slightly from the openings 41, 42, 43 and 44 beyond the top surface 49 of the electromagnet unit the openings corresponding to them (the pole faces in the openings of the first and second columns in FIG. 2A correspond to the pole ends of the electromagnet unit with [32-1], [32-2], [31-1] and [31-2] a column in the module base plate.
  • the yoke ends are inserted into these openings until their pole face is flush with the plane of the module base plate. It should be noted repeatedly that an electromagnetic unit is provided for each module column.
  • the electromagnet units are arranged staggered for adjacent module gaps.
  • the pole faces of adjacent module columns are also offset from one another.
  • Two electromagnets offset against each other units are indicated in Fig. 2B by the dashed contours of their cover plates.
  • Fig. 5 shows two adjacent module base plates of the upper module row in a perspective view with a view of the side facing the pressure hammers.
  • the left base plate 9 has extensions 93 and 94 on its left side and cutouts 91 and 92 on its right side.
  • the extensions are marked with 103, 104 and the cutouts with 101 and 102.
  • the extensions and recesses have such a shape that they fit into one another in a form-fitting manner.
  • Fig. Shows two adjacent module base plates 7 and 8 of the lower module row in a perspective view with a view of the side facing the pressure hammers.
  • the module base plates 9 and 10 according to FIG. 5 can be thought to be rotated by 180 ° about the imaginary axis 2 such that there is a distance between these module base plates in the rotated state and those 7, according to FIG. 6 Recording of the print hammers remains.
  • FIG. 7 shows a fragmentary schematic perspective illustration of a printing hammer lying between the upper and lower row of modules.
  • the section of the module in the upper row of modules is shown with 80, the one in the lower row with 70.
  • the upper and lower row of modules are spaced apart from one another by spacers 83 running in grooves 82.
  • the course of these spacers corresponds to the column boundaries indicated in FIG. 1 by simple lines.
  • a print hammer is assigned to each column. 7 shows one of these print hammers and is identified by 71.
  • the direction of action of the print hammer is indicated by the arrow D. Details of the print hammers are shown in FIGS. 3A and 3B. These figures show a top view of print hammers lying next to one another in the print hammer bank, in which the anchor webs effective for the drive are offset from one another.
  • the anchor webs of the pressure hammer 5 are identified by 51, 52, 53 and 54. They are assigned to the working columns, which e.g. are defined by the pole faces 32-1, 32-2, 31-1 and 31-2 (FIG. 2A) of a base plate of the upper row of modules and the pole faces of a corresponding base plate of the lower row of modules aligned with these pole faces.
  • These anchor webs are assigned to the pole faces 32-1, 32-2, 31-1, 31-2 of the second column in FIG. 2A.
  • the print hammers 5 and 6 have recesses 55, 56, 66 and 65 to reduce their weight. At their action ends, they are provided with print hammer heads 57 and 67.
  • the pressure hammers are returned in a conventional manner, e.g. by a leaf spring which engages in a suitable recess 55, 56 or 66, 65.
  • damping elements for defining the starting position of each printing hammer can also be expediently provided.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Impact Printers (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Pens And Brushes (AREA)

Claims (3)

1. Banc de marteau d'impression de construction modulaire pour des dispositifs électromagnétiques d'entraînement de marteaux d'impression,
dans lesquels des entrefers magnétiques de travail pouvant être activés par voie électromagnétique sont définis et il est prévu un élément en forme de languette (5, 6) (poussoir, marteau d'impression), qui est déplaçable en direction de l'entrefer de travail, agit sur une plaque d'impact (71) du marteau d'impression et comporte des barrettes d'armature (51-54, 61-64) réalisées en un matériau aimantable et à chacune desquelles est associé un entrefer de travail,
et dans lequel les entrefers de travail d'électroaimants (30) associés respectivement à des extrémités polaires (31-1, 31-2, 32-1, 32-2) situées en vis-à-vis, possèdent une étendue en largeur plus grande que l'élément en forme de languette, les électroaimants (30) sont disposés chacun dans un module inférieur (7, 8) et un module supérieur (9, 10) de même forme géométrique et de même constitution,
les électroaimânts (3) pour des marteaux d'impression disposés côte-à-côte à l'intérieur du module sont décalés les uns par rapport aux autres dans la direction d'action des marteaux d'impression, et
lorsque le marteau d'impression est dans sa position initiale et que l'électroaimant n'est pas activé, les barrettes d'armature sont situées devant les entrefers de travail de cet électroaimant et, lorsque ce dernier est activé, les barrettes sont rétractées dans les entrefers de travail de l'électroaimant,
caractérisé en ce que le banc de marteaux d'impression est constitué par une rangée inférieure (4) de modules (7, 8) disposés côte-à-côte et par une rangée supérieure (3) de modules (9, 10) disposés côte-à-côte, possédant une même forme géométrique et une même constitution,
que, lorsqu'on regarde en vue de dessus le plan de déplacement des marteaux d'impression, les modules possèdent une forme ressemblant à un parallélogramme comportant un premier couple de côtés parallèles et un second couple de côtés parallèles, le premier couple de côtés représentant les côtés du module, au niveau desquels des modules voisins ne sont pas appliqués l'un contre l'autre, et le second couple de côtés représentant les côtés du module, au niveau desquels des modules voisins sont appliqués l'un contre l'autre dans leur rangement côte-à-côte, et
les modules situés dans une rangée sont disposés côte-à-côte de telle sorte que la direction d'action du marteau d'impression est perpendiculaire au premier couple de côtés d'un module et que ces côtés de tous les modules dans une rangée de modules sont alignés entre eux et s'étendent parallèlement à la plaque d'impact (71) du marteau d'impression, et que dans la zone de deux côtés contigus du second couple de côtés de deux modules voisins, les marteaux d'impression sont associés en commun à ces modules.
2. Dispositif selon la revendication 1, caractérisé en ce que les électroaimants (30) prévus pour chaque marteau d'impression sont constitués par deux culasses magnétiques en forme de U (31, 32) situées l'une derrière l'autre en étant espacées et dont les branches voisines (31-1, 32-2) sont entourées en commun par une bobine (45).
3. Dispositif selon la revendication 1, caractérisé en ce que chaque module est constitué par une plaque de base (11) tournée du côté des marteaux d'impression, et un corps (12), qui est relié a cette plaque et dans laquelle les unités à électroaimants (30) sont enrobées, et que la plaque de base comporte des ouvertures servant à recevoir les extrémités polaires des culasses des unités à électroaimants.
EP84110756A 1984-09-10 1984-09-10 Banc de marteaux d'impression de construction modulaire Expired EP0174381B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP84110756A EP0174381B1 (fr) 1984-09-10 1984-09-10 Banc de marteaux d'impression de construction modulaire
DE8484110756T DE3479643D1 (en) 1984-09-10 1984-09-10 Print hammer bank of modular construction
JP60119899A JPS6168272A (ja) 1984-09-10 1985-06-04 印刷ハンマ集合体
US06/772,500 US4651640A (en) 1984-09-10 1985-09-04 Print hammer bank in modular design

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84110756A EP0174381B1 (fr) 1984-09-10 1984-09-10 Banc de marteaux d'impression de construction modulaire

Publications (2)

Publication Number Publication Date
EP0174381A1 EP0174381A1 (fr) 1986-03-19
EP0174381B1 true EP0174381B1 (fr) 1989-09-06

Family

ID=8192145

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84110756A Expired EP0174381B1 (fr) 1984-09-10 1984-09-10 Banc de marteaux d'impression de construction modulaire

Country Status (4)

Country Link
US (1) US4651640A (fr)
EP (1) EP0174381B1 (fr)
JP (1) JPS6168272A (fr)
DE (1) DE3479643D1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4768892A (en) * 1985-07-29 1988-09-06 International Business Machines Corporation Electromagnetic hammer actuator for impact printer
US5146849A (en) * 1988-09-07 1992-09-15 Genicom Corporation Print head, mounting therefor and method of mounting

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209891A (en) * 1961-12-14 1965-10-05 Arthur K Littwin Magnetic work holder and method
US3183417A (en) * 1963-04-19 1965-05-11 Wright Add Lee Lifting magnet having a corner less than 90 degrees
US3800257A (en) * 1973-04-09 1974-03-26 Bicron Electronics Multicoil solenoid assembly
US3890587A (en) * 1974-04-01 1975-06-17 Laketown Mfg Corp Plunger solenoid
DE2713514A1 (de) * 1977-03-26 1978-09-28 Decision Data Computer Corp Druckvorrichtung mit einer anzahl von elektromechanisch betaetigbaren druckhaemmern
JPS5415692U (fr) * 1977-07-01 1979-02-01
DE3065513D1 (en) * 1979-06-29 1983-12-15 Ibm Electromagnetic device for driving a print element
DE3018407A1 (de) * 1980-05-14 1981-11-19 Ibm Deutschland Gmbh, 7000 Stuttgart Elektromagnetisch betaetigbarer stoesselantrieb, insbesondere fuer anschlagdrucker
FR2482359A1 (fr) * 1980-05-06 1981-11-13 Staubli Sa Ets Bloc de commande a electro-aimants, notamment pour l'actionnement des ratieres pour machines a tisser
JPS5774182A (en) * 1980-10-29 1982-05-10 Fujitsu Ltd Mounting method for typing magnet
DE3114835A1 (de) * 1981-04-11 1982-11-04 Ibm Deutschland Gmbh, 7000 Stuttgart Bank zur aufnahme mehrerer druckstoesseleinheiten
FR2528257A1 (fr) * 1982-06-03 1983-12-09 Menzer Lakhdar Generateur d'electricite a partir d'un aimant
JPS5994848U (ja) * 1982-12-17 1984-06-27 日立工機株式会社 プツシユロツド組立体

Also Published As

Publication number Publication date
JPS6168272A (ja) 1986-04-08
JPH0351225B2 (fr) 1991-08-06
DE3479643D1 (en) 1989-10-12
US4651640A (en) 1987-03-24
EP0174381A1 (fr) 1986-03-19

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