EP0118425A1 - Kupplungsvorrichtung zum vorübergehenden verbinden zweier werkstücke - Google Patents
Kupplungsvorrichtung zum vorübergehenden verbinden zweier werkstückeInfo
- 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- Withdrawn
Links
- 238000007373 indentation Methods 0.000 claims description 15
- 230000008878 coupling Effects 0.000 abstract 3
- 238000010168 coupling process Methods 0.000 abstract 3
- 238000005859 coupling reaction Methods 0.000 abstract 3
- 239000011159 matrix material Substances 0.000 description 10
- 230000000875 corresponding effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- KKEBXNMGHUCPEZ-UHFFFAOYSA-N 4-phenyl-1-(2-sulfanylethyl)imidazolidin-2-one Chemical compound N1C(=O)N(CCS)CC1C1=CC=CC=C1 KKEBXNMGHUCPEZ-UHFFFAOYSA-N 0.000 description 1
- 229920004943 Delrin® Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
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)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/US1982/001206 WO1984000926A1 (en) | 1982-09-08 | 1982-09-08 | Fastening mechanism for removably fastening together two workpieces |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0118425A1 true EP0118425A1 (de) | 1984-09-19 |
Family
ID=22168179
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19820902889 Withdrawn EP0118425A1 (de) | 1982-09-08 | 1982-09-08 | Kupplungsvorrichtung zum vorübergehenden verbinden zweier werkstücke |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0118425A1 (de) |
DE (1) | DE3347884A1 (de) |
WO (1) | WO1984000926A1 (de) |
Cited By (1)
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)
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)
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 |
-
1982
- 1982-09-08 EP EP19820902889 patent/EP0118425A1/de not_active Withdrawn
- 1982-09-08 WO PCT/US1982/001206 patent/WO1984000926A1/en unknown
-
1983
- 1983-08-31 DE DE19833347884 patent/DE3347884A1/de not_active Ceased
Non-Patent Citations (1)
Title |
---|
See references of WO8400926A1 * |
Cited By (1)
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 |
---|---|
DE3347884A1 (de) | 1985-11-07 |
WO1984000926A1 (en) | 1984-03-15 |
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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 |