EP0349699B1 - Vorrichtung zum In- und Ausserstandsetzen des Stechers einer Stick- und Steppmaschine oder einer ähnlichen Maschine, die eine Kupplung für den Stecher aufweist - Google Patents

Vorrichtung zum In- und Ausserstandsetzen des Stechers einer Stick- und Steppmaschine oder einer ähnlichen Maschine, die eine Kupplung für den Stecher aufweist Download PDF

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Publication number
EP0349699B1
EP0349699B1 EP88830409A EP88830409A EP0349699B1 EP 0349699 B1 EP0349699 B1 EP 0349699B1 EP 88830409 A EP88830409 A EP 88830409A EP 88830409 A EP88830409 A EP 88830409A EP 0349699 B1 EP0349699 B1 EP 0349699B1
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EP
European Patent Office
Prior art keywords
piercer
support member
recesses
enabling
projection
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
EP88830409A
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English (en)
French (fr)
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EP0349699A1 (de
Inventor
Victor Czyz
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.)
Comerio Ercole SpA
Original Assignee
Comerio Ercole SpA
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Filing date
Publication date
Application filed by Comerio Ercole SpA filed Critical Comerio Ercole SpA
Priority to AT88830409T priority Critical patent/ATE90119T1/de
Publication of EP0349699A1 publication Critical patent/EP0349699A1/de
Application granted granted Critical
Publication of EP0349699B1 publication Critical patent/EP0349699B1/de
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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C7/00—Special-purpose or automatic embroidering machines
    • D05C7/04—Special-purpose or automatic embroidering machines for boring or jogging

Definitions

  • This invention relates to a device adapted to enable or disable a piercer in an embroidery machine, quilting machine or the like, provided with a jointed coupling for the piercer.
  • the major drawbacks in the known embroidery machines are substantially the long periods of time required for enabling a portion of the piercers and for disabling another portion, as well as the non disregardable precision loss due just to the frequent operations required to enable and disable the piercers.
  • a first type of known method for locking a piercer on to the bar which drives said piercer during the piercing stroke provides for a piercer back extension, having a hollow circular seat, to be inserted on a corresponding pin fastened to said bar.
  • a small positioning spring is engaged in a seat of the piercer body and is hooked to a clamping means which keeps it in said position, whereby the piercer is in turn locked to the drive bar.
  • the plurality of piercers may be each individually disassembled or assembled in that each one of them has a pin and a small positioning spring associated therewith.
  • the enabling and disabling operations are extremely time consuming both because of the high number of piercers and because, before the embroidery operations can be resumed, adjusting operations of each individual piercer are required.
  • a further drawback stems for the fact that the plurality of the piercers taken off the embroidery machine are first sharpened and stored away in suitable containers wherein they are continuously in contact with each other. Moreover, the frequent replacements affect the spring constant of the positioning spring whereby said spring will definitely not be able to ensure a correct positioning of the piercer with time. As it should be apparent the above drawback jopardizes the quality of the embroidery performed.
  • a second type of known clamping arrangement between a piercer and the drive bar thereof provides for a threaded rear part of the piercers which can be threadably coupled to the bar.
  • the entire drive bar may be replaced with a new one having the required piercing ratio.
  • the present invention comprises the means pointed out in the characterizing part of the amended claim 1, in order to require a lower force to bring the piercer from the disabled position to the working position and to avoid wear on the cited members. Furthermore in the subclaims 2 and 3 are pointed out the features adapted to obtain a stable location of the piercer in the operating position, without the risk that the piercer is subjected to an incorrect rotating movement during the piercer work.
  • the device includes a first support member 10 extending transverse and at right angles relative to a bar 12 carrying piercers 13 and provided with an extension 14 abutting against the top face of bar 12 and being fastened thereto by means of a screw 16 or any other suitable means.
  • Bar 12 which is substantially L-shaped, is supported by the upper end of a bracket 18, and it is fastened to said end by means of a screw 20 or other suitable means.
  • brackets 18 In an embroidery machine there is usually provided a plurality of brackets 18, whose number is increasingly higher as the number of piercer carrier bars or banks 12 increases.
  • brackets 18 are fastened to, and supported by, shafts 22 slidably received within guides (not shown) of the embroidery machine.
  • the device according to the invention includes as well as a second substantially L-shaped support member 24, having a piercer 13 fastened to a side 26 thereof, while second side 28 of the support member is engaged against one of the side faces of first support member 10, as it will be explained in the following.
  • Clamping of piercer 13 to side 26 of second support member 24 is performed through a threaded engagement of shank 30 of piercer 13 within a corresponding threaded opening of side 26, and final locking means of a locknut 32.
  • a connecting shaft 34 is inserted through first support member 10 and through side 28 of second support member 24. Between enlarged head 36 of shaft 34 and support member 10 there is inserted a plurality of Belleville springs 38, whose function is to ensure that engagement between side 28 of second support member 24 and first support member 10 takes place with a high and predetermined pressure level.
  • a pin 39 is applied through the free end of shaft 34 and it engages in turn within a recess 41 of side 28 of second support member 24 just under the bias of Belleville springs 38.
  • first support member 10 and of side 28 of second support member 24 are not planar but they are suitably provided with projections and recesses adapted to generate a coupling type connection between said members, under the action of Belleville springs 38.
  • said coupling type connection which will be described in the following, provides only two operating positions.
  • a first operating position of piercer 13 is the one shown in Figure 1, wherein support bar 12 thereof reciprocated from the position shown in full lines to the position shown in broken lines, and viceversa, whereby the piercer moves in the same way between the two positions shown in full lines and in broken lines respectively, piercing the fabric shown schematically and indicated by reference T.
  • piercer 13 is shown therein in the idle position thereof, while the piercer adjacent thereto is shown in the working position.
  • piercer 13 lies at an angle of substantially 90° relative to the working position, and it points downwards.
  • the idle position is determined taking into account minimum disturbance for other moving members, and ease in performing the uncoupling and coupling operations.
  • recesses 40 are in the number of three lying 120° apart from each other, one of them in addition being oriented horizontally.
  • Recesses 42 as well lie 120° apart from each other, and one of them in particular is oriented vertically.
  • the remaining ones as well are spaced 90° apart, just to obtain the 90° degree displacement from the enabled position to the disabled position of piercer 13.
  • piercer 13 When projections 44 are received within recesses 40, piercer 13 lies in the working or enabled position, while if projections 44 are received within recesses 42, piercer 13 lies in the idle or disabled position.
  • This particular feature is emphasized in the details shown in an enlarged scale on Figure 3, for the upper piercer of said figure and for the lower one of the same figure, respectively.
  • springs 38 will be such as to securely hold piercer 13 in the two above positions and in particular, concerning the working position, this will always be the correct one, since the piercer has not been subjected to any displacement relative to support member 24.
  • a further advantageous aspect of the device of the invention derives from the fact that the displacement operation the operator has to perform to disable or to enable the piercer 13 is in no way complicated, as a matter of fact it is extremely simple in that he will be sure the piercer is in its correct position when feeling that projections 44 have snapped into recesses 40 and 42, without being required to pay any attention to the actual piercer position.
  • Recesses 42 have been provided with a shallower depth in order to make easier for projections 44 to snap therein, and in order to require a lower force to bring the piercer to the working position. In fact, when the piercer is in an idle or disabled position, he is subjected to no other forces except the force of inertia generated upon said piercer by the displacement of bar 12.
  • inlet edges 43 of recesses 40 and 42 are chamfered, in order not to cause excessive friction forces and corresponding parts wear.
  • projections 44 have a contoured cross section.
  • a coupling arrangement may be envisaged, which does not rely upon projections and recesses as locking members, but upon a friction coupling, a clutch coupling or the like, through which the same purpose can be met.
  • coupling means may be provided which include a plurality of suitably shaped matingly engageable shapes, spaced along outer surface 45, 46 of members 10 and 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (3)

  1. Vorrichtung zum Zu- und Abschalten eines Dorns in einer Stickereimaschine, einer Steppmaschine oder dergleichen, mit einem ersten und zweiten Tragteil (10, 24), wobei das zweite Teil einen Dorn (13) trägt, der an ihm befestigt ist, und wobei die Teile miteinander durch eine gelenkige Kupplungsanordnung miteinander verbunden sind, die durch die Anordnung eines nachgiebigen Mittels (38) den Dorn (13) freigibt zu einer Bewegung aus der Arbeitsstellung, in der er im wesentlichen im rechten Winkel zu der zu bestickenden Textilie (T) liegt, in eine Abschaltstellung, in der er im wesentlichen parallel zu dieser Textilie (T) liegt und umgekehrt, wobei der erste Tragteil (10) an einem oszillierenden Stab (12) befestigt ist, welcher Dorne (13) in ihrer Bewegung antreibt, während der zweite Tragteil (24) mit dem ersten durch eine Welle (34) verbunden ist, wobei an gegenüberliegenden Flächen der Tragteile (10, 24) wenigstens ein Vorsprung (44) und zwei Vertiefungen (40, 42) vorgesehen sind, wobei der Vorsprung (44) so ausgeführt ist, daß er eine passende Verbindung mit der Vertiefung (40 oder 42) eingeht und das Tragteil des Dorns (13) in den gewünschten Stellungen zeitweilig festhält,
    dadurch gekennzeichnet, daß die Vertiefung (40) in Eingriff mit dem Vorsprung (44) in der Arbeitsstellung des Dorns (13) eine größere Tiefe und Breite gegenüber der Tiefe und Breite der Vertiefung (42) hat, die in Eingriff steht mit dem Vorsprung (44) in der abgeschalteten Stellung des Dorns (13).
  2. Vorrichtung nach Anspruch 1,
    dadurch gekennzeichnet, daß eine Mehrzahl von Vorsprüngen (44) vorgesehen sind, die vorgesehen sind für den Eingriff mit einer Mehrzahl von Vertiefungen (40) oder (42) jeweils für die Arbeitsbzw. Abschaltstellung des Dorns (13).
  3. Vorrichtung nach Anspruch 1 und/oder 2,
    dadurch gekennzeichnet, daß sich die Vorsprünge (44) und Vertiefungen (40, 42) in einer im wesentlichen radialen Richtung um die Öffnung erstrecken, in die die Welle (34) durch Tragteile (10, 24) eingesetzt ist.
EP88830409A 1988-07-08 1988-10-07 Vorrichtung zum In- und Ausserstandsetzen des Stechers einer Stick- und Steppmaschine oder einer ähnlichen Maschine, die eine Kupplung für den Stecher aufweist Expired - Lifetime EP0349699B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88830409T ATE90119T1 (de) 1988-07-08 1988-10-07 Vorrichtung zum in- und ausserstandsetzen des stechers einer stick- und steppmaschine oder einer aehnlichen maschine, die eine kupplung fuer den stecher aufweist.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2129488 1988-07-08
IT8821294A IT1226235B (it) 1988-07-08 1988-07-08 Dispositivo per la attivazione e disattivazione di un perforatore inuna macchina ricamatrice, trapuntatrice o simili provvisto diun attacco snodabile del perforatore.

Publications (2)

Publication Number Publication Date
EP0349699A1 EP0349699A1 (de) 1990-01-10
EP0349699B1 true EP0349699B1 (de) 1993-06-02

Family

ID=11179666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88830409A Expired - Lifetime EP0349699B1 (de) 1988-07-08 1988-10-07 Vorrichtung zum In- und Ausserstandsetzen des Stechers einer Stick- und Steppmaschine oder einer ähnlichen Maschine, die eine Kupplung für den Stecher aufweist

Country Status (5)

Country Link
EP (1) EP0349699B1 (de)
JP (1) JPH0261157A (de)
AT (1) ATE90119T1 (de)
DE (1) DE3881516T2 (de)
IT (1) IT1226235B (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR381277A (fr) * 1907-08-26 1908-01-07 August Braun Perfectionnements apportés aux percoirs à charnières pour brodeuses
CH353608A (de) * 1957-08-07 1961-04-15 Rohner Jacob Ag Verfahren und Einrichtung zur Ausführung des selbsttätigen Rapportwechsels sowie des selbsttätigen Fadenwechsels bzw. Aufnehmens eines zusätzlichen Oberfadens auf einer Schiffchenstickmaschine
IT1188284B (it) * 1986-01-21 1988-01-07 Comercio Ercole Spa Dispositivo per l'attivazione e disattivazione di barre porta-ago e barre porta-perforatore secondo un programma preimpostabile,particolarmente in una macchina ricamatrice a navetta

Also Published As

Publication number Publication date
JPH0428820B2 (de) 1992-05-15
DE3881516D1 (de) 1993-07-08
ATE90119T1 (de) 1993-06-15
DE3881516T2 (de) 1993-09-23
JPH0261157A (ja) 1990-03-01
IT1226235B (it) 1990-12-27
IT8821294A0 (it) 1988-07-08
EP0349699A1 (de) 1990-01-10

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