EP0118425A1 - Mecanisme d'accouplement pour accoupler deux pieces de facon amovible - Google Patents

Mecanisme d'accouplement pour accoupler deux pieces de facon amovible

Info

Publication number
EP0118425A1
EP0118425A1 EP19820902889 EP82902889A EP0118425A1 EP 0118425 A1 EP0118425 A1 EP 0118425A1 EP 19820902889 EP19820902889 EP 19820902889 EP 82902889 A EP82902889 A EP 82902889A EP 0118425 A1 EP0118425 A1 EP 0118425A1
Authority
EP
European Patent Office
Prior art keywords
stud member
fastening mechanism
abutment surfaces
aperture
stud
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.)
Withdrawn
Application number
EP19820902889
Other languages
German (de)
English (en)
Inventor
Emil FÖRSCHNER
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.)
NCR Voyix Corp
Original Assignee
NCR 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 NCR Corp filed Critical NCR Corp
Publication of EP0118425A1 publication Critical patent/EP0118425A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
    • B41J29/02—Framework
    • 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
    • B41J2/22—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material
    • B41J2/23—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of impact or pressure on a printing material or impression-transfer material using print wires
    • B41J2/235—Print head assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/02—Releasable fastening devices locking by rotation

Definitions

  • the present invention relates to a fastening mechanism for removably fastening together two work- pieces.
  • the invention has particular application to a fastening mechanism for releasably securing a print head to a reciprocating carriage in a printer.
  • Dot matrix printers are becoming increasingly more important and useful in the field of high-speed document printing. Printers of this kind are extremely advantageous for use with data -processing systems where ⁇ in it is required to provide a printout of the data generated at very high speeds.
  • a print head carriage carrying the dot matrix print head is slidably mounted on a support shaft and is movable in a bi-directional linear path back and forth along a printing line, the printing being performed by selec- tively operating a plurality of print wires or ink jets to produce a matrix of dots on a record medium to form alphanumeric characters thereon.
  • a fastening mechanism for removably securing together first and second workpieces, including a stud member which is mounted on the first workpiece for rotational and axial movement relative thereto and which is arranged to pass through an aperture in the second workpiece, spring means associated with the stud mem ⁇ ber, and first and second cooperating means respectively provided on the stud member and the second workpiece whereby, with the stud member passing through the aperture and upon rotating the stud member from a first position to a second position, axial movement of the stud member is brought about against the action of the spring means and the first and second workpieces are latched together.
  • the fastening mechanism removably secures the housing of a wire matrix print head to a printer carriage.
  • a support block on the carriage (first workpiece) carries a locking member that includes a stud member and abutment surfaces on the stud member.
  • Fig. 1 is a fragmentary top view of a matrix print head housing secured to a carriage of a printer by a fastening mechanism according to the invention.
  • Fig. 2 is a fragmentary elevational view, partly in section, showing in greater detail the locking member of the fastening mechanism according to the in- vention mounted on support blocks of the carriage of the printer.
  • Fig. 3 is a top view of a wire matrix print head housing and mounting plate carrying a retaining structure according to the invention.
  • Fig. 4 is a cross-sectional elevation taken along the line 4-4 of Fig. 3.
  • Fig. 5 is a cross-sectional elevation taken along the line 5-5 of Fig. 3.
  • a carriage 10 of a matrix printer is slidably mounted on a support shaft (not shown) " for bi-directional linear movement parallel to the line of printing.
  • the carriage 10 is of cast aluminum and is provided with a pair of generally tri- angular-shaped support blocks 12 on which are mounted a wire matrix print head 14 having a housing 16 for the print wires (not shown) of the head 14.
  • Each of the blocks 12 has a bore 20 therethrough (Fig. 2) having mounted therein a captive locking member 22.
  • each locking member 22 incorporates a steel stud 24 to one end of
  • a radially extending wing member 25 which is made of a suitable synthetic material, such as DELRIN, and which is bonded to the stud 24 by conven ⁇ tional molding techniques.
  • the wing member 25 has a ridge 26 and a cylindrical portion 27 coaxial with the stud 24.
  • the wing member 25 also has a pair of abut ⁇ ment surfaces 28 thereon which are arranged to engage with a cooperating retaining structure 55 on a print head mounting plate 50, as explained hereafter.
  • Fig. 2 shows the mounting of a locking member
  • the stud 24 of the locking member 22 passes through the bore 20 of the support block 12 and is held captive therein by an end assembly shown generally at 32.
  • the end assembly 32 comprises a split washer 34 held in a circumferential groove (not seen) in the end of the stud 24.
  • a pair of annular spring members 38 bowed in oppo ⁇ site directions are positioned ' between the washer 34 and an abutting surface 40 of the support block 12.
  • the spring members 38 provide a strong spring or biasing force to urge the locking member 22 downwardly (as viewed in Fig. 2) so as to firmly hold the abutment surfaces 28 into engagement with the retaining structure 55 of the print head housing 16, when the print head housing 16 and carriage 10 are secured together.
  • the bore 20 has an increased diameter portion 42 for accommodating a compression spring 44 which is mounted around the stud 24 and which serves to weakly bias an annular abutment surface 46 of the locking member 22 away from the support block 12, prior to fastening of the carriage and print head housing.
  • spring 44 plays no part in the actual fastening of print head housing 16 to the car ⁇ riage 10, it serving its function only prior to fasten- ing. The operation of the spring 44 will be explained in more detail later.
  • the mounting plate 50 is shown secured to the support block 12 by means of the cooperating abutment surfaces on locking member 22 and retaining structure 55 on plate 50.
  • FIG. 3 shows the print head housing 16 of Fig. 1 with the carriage 10 and locking members 22 re- moved, thereby more clearly showing the two mounting plates 50 formed integrally on either side of the hous ⁇ ing 16.
  • Each mounting plate 50 has an aperture 52 having a slit 54 extending diametrically therethrough with an open end at the edge of the mounting plate 50.
  • the apertures 52 each have a diameter large enough to permit the cylindrical portion 27 of the relevant lock ⁇ ing member 22 to pass therethrough, and the width of each slit 54 is chosen to allow passage of the relevant wing member 25.
  • Each aperture 52 has the annular retaining structure 55 around its circumference which forms, with locking member 22, the fastening mechanism of the pre ⁇ sent invention.
  • the retaining structure 55 consists of cam surfaces 56 and 62 for cooperating with the abutment surfaces 28 of the respective locking member 22, and indentations 58 and 64 for receiving the abutment sur ⁇ faces and retaining the locking members 22 in a latched position.
  • Figs. 4 and 5 are cross-sections of the retain- ing structure 55 taken along a line passing through the middle of the slit 54 and viewed from opposite directions.
  • Fig. 4 shows a rising cam surface 56 followed by an indentation 58 and a stop member 60.
  • the rising cam surface 62 is followed by an indentation 64.
  • the indentations 58 and 64 of each plate 50 are positioned opposite each other on either side of the associated slit 54, as are the associated cam sur ⁇ faces 56 and 62.
  • Two alignment holes 66 (Figs. 1 and 3) are respectively provided in the mounting plates 50 of the print head.
  • the holes 66 are arranged to engage corres ⁇ ponding rigid mounting pins 68 on the support blocks 12 of the carriage (Fig. 1) to provide automatic and easy alignment of the print head 14 when being mounted onto the carriage 10, and also mechanical support for the print head 14 during operation.
  • the operation of the fastening means according to the invention is as follows. When it is desired to mount the print head 14 onto the carriage 10 of the printer, the operator positions the wing member 25 of each locking member 22 to point in a direction corres- ponding to the direction of the respective slit 54.
  • the left hand wing member 25 is rotated in an anticlockwise direction to the position shown in Fig. 1, and the right hand wing member 25 is rotated in a clockwise direction from the position shown in Fig. 1 to a position in which it is aligned with the associated indentations 58, 64.
  • the two abutment surfaces 28 on each wing member 25 ride up on the oppo- sitely facing cam surfaces 56 and 62 of the associated mounting plate 50, forcing each locking member 22 to move axially against the force of the associated spring member 38.
  • Each locking member 22 is rotated until the wing member 25 engages the stop member 60 of the asso- ciated mounting plate 50, at which point the abutment surfaces 28 are urged into the associated indentations 58 and 64, under the action of the spring members 38, thereby firmly latching the locking member 22 in a closed position in which it secures together the asso ⁇ ciated block 12 and mounting plate 50.
  • each locking device 22 When it is desired to remove the print head for servicing or repair, the operator unlocks each locking device 22 by first pulling the wing member' 25 away from the associated block 12 against the action of the spring members 38 so as to disengage the abutment surfaces 28 from the respective indentations 58 and 64, and then rotates the locking member 22 by means of the wing member 25 away from the housing 16 until the wing member 25 is in alignment with the respective slit 54 in the associated mounting plate 50. The print head 14 can then be lifted off the carriage 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Common Mechanisms (AREA)

Abstract

Mécanisme d'accouplement (10) pour attacher de façon amovible deux pièces, comme le plateau de fixation (50) d'un boîtier de tête d'impression (16) et les blocs de soutien (12) d'un chariot (10) dans une imprimante ligne par ligne. Le mécanisme d'accouplement possède un organe de verrouillage (22) doté d'une partie goujon (24) montée sur le chariot (10) pour un déplacement rotatif et axial en rapport avec ce dernier et possédant des surfaces d'aboutement (28) coopérant avec des surfaces de came (56, 62) sur le boîtier de la tête d'impression (16) après rotation de l'organe de verrouillage (22), de façon à verrouiller le boîtier de la tête d'impression (16) avec le chariot (10) grâce à l'action d'un ressort (38) sollicitant l'organe de verrouillage dans une direction axiale. Le mécanisme d'accouplement permet le montage simple et rapide du boîtier de tête d'impression (16) avec le chariot (10), ainsi que leur démontage, sans utiliser d'outils.
EP19820902889 1982-09-08 1982-09-08 Mecanisme d'accouplement pour accoupler deux pieces de facon amovible Withdrawn EP0118425A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1982/001206 WO1984000926A1 (fr) 1982-09-08 1982-09-08 Mecanisme d'accouplement pour accoupler deux pieces de façon amovible

Publications (1)

Publication Number Publication Date
EP0118425A1 true EP0118425A1 (fr) 1984-09-19

Family

ID=22168179

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820902889 Withdrawn EP0118425A1 (fr) 1982-09-08 1982-09-08 Mecanisme d'accouplement pour accoupler deux pieces de facon amovible

Country Status (3)

Country Link
EP (1) EP0118425A1 (fr)
DE (1) DE3347884A1 (fr)
WO (1) WO1984000926A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9955600B2 (en) 2015-02-17 2018-04-24 Watchfire Signs, Llc Fasteners for use in display structures

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4570168A (en) * 1984-07-20 1986-02-11 Tektronix, Inc. Two-dimensional ink jet adjustment mechanism
DE3706560A1 (de) * 1987-02-28 1988-09-08 Mannesmann Ag Drucker, insbesondere matrixdrucker
GB2269848A (en) * 1992-08-10 1994-02-23 Gang Nail Systems Limited Releasable connnector
AUPQ270599A0 (en) * 1999-09-08 1999-09-30 Varian Australia Pty Ltd Spectrophotometer apparatus and phosphorescence measurement
US10690158B2 (en) 2016-09-13 2020-06-23 Watchfire Signs, Llc Technologies for interlocking structures

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR335272A (fr) * 1903-09-01 1904-01-18 Pierre Dubault Dispositif de fixation pour capotes de voitures, baches, valises et autres articles analogues
US1087084A (en) * 1912-12-21 1914-02-10 John W Force Turn-button.
US1224709A (en) * 1916-06-06 1917-05-01 Leon Cholet Safety-chair for window-cleaners.
US2315335A (en) * 1942-04-18 1943-03-30 Mills Summers J Fastening device
US2797464A (en) * 1953-04-09 1957-07-02 Victor F Zahodiakin Fastening device
FR2413976A1 (fr) * 1978-01-05 1979-08-03 Triumph Werke Nuernberg Ag Fixation d'une tete imprimante a aiguilles sur son support
US4222673A (en) * 1978-09-20 1980-09-16 Durango Systems, Inc. Print head carriage assembly for serial printers
US4229114A (en) * 1979-02-12 1980-10-21 Dataproducts Corporation Mechanism for operator-replaceable printhead
DE3151776C2 (de) * 1981-12-29 1986-03-20 Siemens AG, 1000 Berlin und 8000 München Vorrichtung zum Lagern und Einstellen eines Druckkopfes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8400926A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9955600B2 (en) 2015-02-17 2018-04-24 Watchfire Signs, Llc Fasteners for use in display structures

Also Published As

Publication number Publication date
WO1984000926A1 (fr) 1984-03-15
DE3347884A1 (de) 1985-11-07

Similar Documents

Publication Publication Date Title
US5458346A (en) Keyless saw blade chuck
US7608970B2 (en) Brush holder assemblies with removable rotatable handles and methods of replacing brush holders
US5987758A (en) Quick-change blade clamp
US4473312A (en) Fastening mechanism for removably fastening together two workpieces
DE60226025T2 (de) Befestigungsvorrichtung für eine tragbare einheit zum bohren auf einer kreisförmigen bahn
BR0301711A (pt) Aparelho de gravação de jato de tinta e cartucho de tinta
EP0617648A4 (fr) Appareil servant a adapter un porte-outil pour le monter sur un element de base.
EP0118425A1 (fr) Mecanisme d'accouplement pour accoupler deux pieces de facon amovible
US4974508A (en) Screen printing apparatus
US4544290A (en) Apparatus for mounting a daisy wheel in a daisy wheel printer
US4222673A (en) Print head carriage assembly for serial printers
US4229114A (en) Mechanism for operator-replaceable printhead
US4381896A (en) Print head mounting assembly with form adjustment
US4869455A (en) Motor and gear mounting bracket
JPS5923277B2 (ja) ドツト印字ヘツド
US4479731A (en) Serial printer carriage mounting
US4049110A (en) Print wheel mounting assembly
US4867589A (en) Matrix printer with ink ribbon guide disposed on print head carriage
JP3926067B2 (ja) パレット及びパレットアームの組み合せ体
IE51001B1 (en) Stylus printing head comprising electromagnets on resilient supports
US5682817A (en) Quick removing compact disc printing nest
JP3089574U (ja) 印字装置
US3858511A (en) Flexible plate saddle lock-up system
KR102578164B1 (ko) 전동공구의 블레이드 탈착 구조
JP3385888B2 (ja) 感熱紙の印字装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19840809

RIN1 Information on inventor provided before grant (corrected)

Inventor name: FOERSCHNER, EMIL