EP3452653B1 - Method for operating a thread cutter and thread clamping apparatus for cutting the shuttle thread in a large sticking machine, and apparatus for operating the thread cutter assembly for implementing the method - Google Patents

Method for operating a thread cutter and thread clamping apparatus for cutting the shuttle thread in a large sticking machine, and apparatus for operating the thread cutter assembly for implementing the method Download PDF

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Publication number
EP3452653B1
EP3452653B1 EP17709376.2A EP17709376A EP3452653B1 EP 3452653 B1 EP3452653 B1 EP 3452653B1 EP 17709376 A EP17709376 A EP 17709376A EP 3452653 B1 EP3452653 B1 EP 3452653B1
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EP
European Patent Office
Prior art keywords
thread
cutting
shuttle
clamping
embroidery
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EP17709376.2A
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German (de)
French (fr)
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EP3452653A1 (en
Inventor
Franz Lässer
Hanno Nussbaumer
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Laesser AG
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Laesser AG
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Publication of EP3452653A1 publication Critical patent/EP3452653A1/en
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C11/00—Devices for guiding, feeding, handling, or treating the threads in embroidering machines; Machine needles; Operating or control mechanisms therefor
    • D05C11/20—Arrangements for cutting the needle or lower threads

Definitions

  • the invention relates to a method for actuating a thread cutting and thread clamping device according to the preamble of patent claim 1 and an actuating member for a device for carrying out the method according to patent claim 4.
  • Thread cutting devices for large embroidery machines have been known for many years, which are assigned to each individual embroidery location and which, controlled by the program, can cut individual or a plurality of selected shuttle threads between the shuttle and the embroidery material.
  • Such a thread cutting device is for example from the EP 0 638 682 B1 known.
  • a shuttle embroidery machine with a driver bar unit is also known, with which the independent shutdown of each individual shuttle is made possible.
  • a shuttle prevents the cut thread end on the shutdown shuttle from being destroyed by the rapid up and down movement of the shuttle, or even literally being crushed, and consequently a safe stitching is no longer guaranteed.
  • a pneumatic piston-cylinder unit is provided, with which the lower driver nail in the driver bar can be extended from the area of the boat train via an angle lever. The shuttle located in the respective shuttle track slides down slightly after the driver nail has been pulled out and is held in this position.
  • the pneumatic nail unit is used to guide the driver nail back into the shuttle train and to slightly raise the shuttle again when it is inserted. Thanks to this stopping of the shuttle, the shuttle thread leading away from the shuttle of an unneeded shuttle is not destroyed during embroidery.
  • An object of the present invention is to provide a method and a device which make it possible to cut the shuttle thread between the needle plate and the embroidery base with the embroidery close to the embroidery base. Another task is to cut the thread end between the shuttle and hold the embroidery base temporarily until the stopped embroidery site is put back into operation.
  • the thread held in the clamping device is ready to be sewn on at any time.
  • the construction of the device can also be produced very inexpensively, since a switchover drive for a large number, for example for 48 embroidery sites, can be combined for switching on the thread cutting and thread clamping device.
  • a single drive makes it possible to actuate the thread cutting and thread clamping arrangement at, for example, 48 or more locations.
  • the control of the drive for cutting and clamping is simplified and, in addition, far less space is required and the area of the individual embroidery points on the shuttle side is therefore less obstructed.
  • a driver bar 1 with an upper driver nail 3 and a lower driver nail 5 extending over the entire length of an embroidery machine with a plurality of embroidery positions is visible on the left side.
  • the two driver nails 3 and 5 are spaced apart from a tap hole plate 7 with a tap hole 72 and protrude with their end regions 3 'and 5' into a shuttle track 9 of a stick 48.
  • the Driver bar 1 is designed to be movable in an oscillating manner according to arrow P, essentially in the vertical direction, for example inclined 15 ° from the vertical, by known drive means, not shown.
  • the lower driver nail 5 arranged there can be moved in the figures in the horizontal direction according to arrow Z and pulled out of the boat track 9 (position according to Fig. 2 ).
  • the boat 11 is then no longer set in motion by the driver bar 1, since the lower driver nail 5 no longer contacts the boat 11 when it is started up.
  • the lower driver nail 5 is inserted and the boat 11 between the two driver nails 3 and 5 in the Figure 1 held invisible game.
  • the lower driver nail 5 is in the retracted position, so that the shuttle 11 slides down a little and is held there in the lowered position in the shuttle track 9.
  • the lower driver nail 5 is pulled back, for example, by an angle lever 13 which is supported on its elbow 15 so as to be pivotable about a pivot axis B.
  • the shorter arm 17 of the angle lever 13 is in engagement with the end of the piston rod 19 of a piston 23 which is displaceable in a cylinder 21.
  • the piston 23 can be actuated by a fluid, for example compressed air, which flows through a valve 25 into the lower one Cylinder space is inserted, can be moved upward against the force of a spring 27 (as in Figures 1 and 2 ) Shown.
  • the longer arm 29 of the angle lever 13 is somewhat spaced on the right side of a radially protruding finger 31 attached to the lower driver nail 5.
  • the piston 23 with the piston rod 19 is guided downward by the spring 27 and the angle lever 13 thereby pivots counterclockwise and pulls the lower driver nail 5 out of the area of the shuttle track 9 into the position as shown in FIG Figure 2 is shown.
  • the angle lever 13 can be pivoted back into the starting position after pulling back the driver nail 5 and lifting the driver bar 1.
  • the shuttle 11 can no longer be moved upward in the shuttle track 9 despite the oscillating movement of the driver bar 1 in the direction of the arrows P due to the lack of engagement of the lower driver nail 5.
  • the boat 11 is stopped.
  • driver bar 1 is shown in the raised position, in which position the angle lever 13 lies during a pivoting movement in the counterclockwise direction outside the engagement with the finger 31 on the lower driver nail 5. From this position, the driver nail 5 can also be pushed back into the shuttle track 9 after the driver bar 1 has been lowered.
  • a thread clamping and cutting device 33 is actuated in the lowest position of the shuttle 11 (cf. Fig. 4-6 . 9 ). They are driven according to Figure 4 and Figure 5 with a connecting rod 35 that can be latched onto the long arm 29 of the angle lever 13.
  • the connecting rod 35 is pivotally supported on one side on a shaft 37 on a rocker 39 for the thread clamping and cutting device 33.
  • the other free end 36 of the connecting rod 35 lies on the boom 42 of a lifting device 46.
  • the lifting device 46 extends over a plurality, for example 48, of embroidery points and makes it possible to detach the connecting rod (s) 35 at the embroidery points from a form-fitting connecting element 49 with the long arm 29 of the angle lever 13 ( Fig.
  • the connecting element 49 comprises, for example, a semicircular, one-sided open recess 50 in the connecting rod 35 on its underside and a cylindrical cam 52, which is laterally projecting from the long arm 29 (cf. also Figure 5 ).
  • the connecting rod 35 is preferably pressed onto the cam 52 or the extension arm 42 of the device 46 by means of a leg spring 69, as long as the free end 36 of the connecting rod 35 is not raised by the device 46. If the cam 52 is pushed into the recess 50 of the connecting rod 35 on the angle lever 13, the thread catching and cutting device can be used with the angle lever 13 and the connecting rod 35 33 are pivoted forward or backward about a pivot axis A formed at the lower end thereof. If the long arm 29 on the angle lever 13, as described in the introduction, is not connected to the connecting rod 35, the long arm 29 serves to push the lower driver nail 5 forward or backward. The thread cutting and thread clamping device 33 is then disengaged.
  • a knife lever 63 projects upwards.
  • the upper end of the knife lever 63 extends into the area between the two driving nails 3 and 5 (in section according to Fig. 6 Not shown).
  • the upper end of the knife lever 63 engages from below in a slot 51 on a first clamping element 47 and a second knife 43 (see Fig. 7 )
  • the cutting and clamping arrangement 75 comprises a first knife 41 made of a rectangular flat body made of metal, the rear end 70 of which is T-shaped and the front end of which has a cutting edge 53.
  • a second knife 43 is arranged adjacent to the first knife 41, the front end of which is hook-shaped and comprises a cutting edge 53 'on the rear side of the hook-shaped part.
  • the second knife 43 projects beyond the rear end 70 of the of the first knife 41 and ends in a recess 51.
  • the second knife 43 is adjoined by a second clamping element 45, the front end of which is also hook-shaped and the rear end of which, like the second knife 43, comprises a slot 51 on its underside.
  • a second clamping element 47 adjoins the second clamping element 45 at the rear and lying in parallel, which on its front side (on the right in FIG Figures 7 ) has an end edge running at right angles to the longitudinal edges and which is essentially T-shaped at its rear end 70.
  • the two knives 41, 43 and the two clamping elements 45, 47 abut each other laterally and are held in a rectangular channel 59 in the Stöckli 48 (cf. Fig. 6 ).
  • the two T-shaped end regions of the second knife 43 and the second clamping element 45 lie laterally on the Stöckli 48 and are pressed against the Stöckli 48 by the clamp holder 67.
  • the rear or rear ends 70 of the first knife 41 and the first clamping element 47 protrude beyond the stick Figure 6 on the left-hand side and are in engagement with the free end of the knife lever 63.
  • the front hook-shaped ends of the second knife 43 and the second clamping element 45 protrude beyond the stick 48 and those in Figure 6 Needle plate 7 not shown.
  • the knife lever 63 is pivoted and this pulls with its upper end the second knife 43 and the second clamping element 45 to the left and with this also the shuttle thread 68 in the direction of the needle plate 7.
  • the shuttle thread 68 which leads from the stick bottom 79 to the boat 11, is first clamped between the second clamping element 45 and the first clamping element 47.
  • the shuttle thread 68 is subsequently cut at the cutting edge 53 'on the second knife 43 and the cutting edge 53 of the first knife 41.
  • the end of the shuttle thread 68 which continues to the embroidery base 79, now protrudes freely from the embroidery base 79 as a short tail.
  • the shuttle thread 68 is only released again from the clamping as soon as this embroidery site is put into operation again and thus the shuttle 11 is again driven by the driver bar 1.
  • the thread cutting and thread clamping device 33 is now in a position as in FIG Fig. 9 shown.
  • the leaf spring 65 on the knife lever 63 ensures that the thread cutting and thread clamping arrangement 75 no longer projects above the surface of the needle plate 7 ( Fig. 9 ).

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Description

Gegenstand der Erfindung ist ein Verfahren zur Betätigung einer Fadenschneid- und Fadenklemmvorrichtung gemäss Oberbegriff des Patentanspruchs 1 sowie ein Betätigungsorgan für eine Vorrichtung zur Durchführung des Verfahrens gemäss Patentanspruch 4.The invention relates to a method for actuating a thread cutting and thread clamping device according to the preamble of patent claim 1 and an actuating member for a device for carrying out the method according to patent claim 4.

Bei einem Farb-, Muster- oder Rapportwechsel müssen beim Sticken auf einer Stickmaschine jeweils die Fäden abgeschnitten werden. In den Anfängen der Stickerei auf mechanischen Stickmaschinen wurden diese Arbeiten manuell vorgenommen. Seit vielen Jahren sind Fadenschneidvorrichtungen für Grossstickmaschinen bekannt, welche jeder einzelnen Stickstelle zugeordnet sind und welche, gesteuert vom Programm, einzelne oder eine Mehrzahl von ausgewählten Schiffchenfäden zwischen dem Schiffchen und dem Stickgut durchtrennen können. Eine solche Fadenschneidvorrichtung ist beispielsweise aus der EP 0 638 682 B1 bekannt.When changing colors, patterns or patterns, the threads must be cut when embroidering on an embroidery machine. In the early days of embroidery on mechanical embroidery machines, this work was done manually. Thread cutting devices for large embroidery machines have been known for many years, which are assigned to each individual embroidery location and which, controlled by the program, can cut individual or a plurality of selected shuttle threads between the shuttle and the embroidery material. Such a thread cutting device is for example from the EP 0 638 682 B1 known.

Bei der Konstruktion solch automatischer Fadenschneid-Einrichtungen steht der Konstrukteur stets vor dem Problem, eine Fadenschneidvorrichtung zu realisieren, die im äusserst knapp bemessenen Raum an Grossstickmaschinen eingebaut werden muss. Man stelle sich vor, dass Grossstickmaschinen mit bis zu tausend Stickstellen, das heisst tausend Nadeln und Schiffchenbahnen mit Schiffchen bestückt werden müssen. Im Weiteren soll das vom Stickgrund weglaufende Fadenende möglichst kurz über dem Stickgrund liegen und das vom Schiffchen bzw. der Bobine im Schiffchen kommende lange Schnittende muss derart angeordnet bleiben, damit ein Ansticken an den zeitweilig stillgelegten Stickstellen nach einem weiteren Farbwechsel ohne Weiteres wieder möglich ist.
Mit der oben bezeichneten bekannten Vorrichtung gemäss EP 0 638 682 B1 gelingt es, zumindest den Schiffchenfaden auf der Seite der Schiffchenbahnen (dem Stöckli) zu schneiden. Allerdings hat sich gezeigt, dass das Fadenende, welches vom Stickgut her kommt, eine verhältnismässig grosse Länge aufweist und dass das zweite Ende, welches vom Schiffchen herführt, nicht in einer genau definierten Lage zu liegen kommt. Dies kann zu Problemen beim Wiederansticken führen.When designing such automatic thread cutting devices, the designer is always faced with the problem of realizing a thread cutting device that has to be installed on large embroidery machines in the extremely limited space. Imagine that large embroidery machines with up to a thousand embroidery points, i.e. a thousand needles and shuttle lanes, have to be equipped with shuttle. In addition, the thread end running away from the embroidery base should be as short as possible above the embroidery base and the long cut end coming from the shuttle or the bobbin in the shuttle must remain arranged in such a way that embroidery at the temporarily disused embroidery sites is easily possible after another color change.
With the known device referred to above EP 0 638 682 B1 it is possible to cut at least the shuttle thread on the side of the shuttle lanes (the Stöckli). However, it has been shown that the thread end, which comes from the embroidery material, has a relatively large length and that the second end, which comes from the shuttle, does not come to lie in a precisely defined position. This can cause problems when restarting.

Aus der EP 1 055 761 B1 ist weiter eine Schiffchenstickmaschine mit einer Treiberbalkeneinheit bekannt, mit welcher das unabhängige Stilllegen jedes einzelnen Schiffchens ermöglicht wird. Durch das Stilllegen eines Schiffchens wird verhindert, dass das geschnittene Fadenende am stillgelegten Schiffchen durch die schnelle Auf- und Abbewegung des Schiffchens zerstört, ja sogar regelrecht zerrieben wird und folglich ein sicheres Ansticken nicht mehr gewährleistet ist. Für die Stilllegung jedes einzelnen Schiffchens ist je eine Pneumatikkolben-Zylindereinheit vorgesehen, mit welcher über einen Winkelhebel der untere Treibernagel im Treiberbalken aus dem Bereich der Schiffchenbahn ausfahrbar ist. Das in der jeweiligen Schiffchenbahn befindliche Schiffchen gleitet nach dem Herausfahren des Treibernagels geringfügig nach unten und wird in dieser Position gehalten. Zum Wiederansticken wird mit der Pneumatik-Zylindereinheit der Treibernagel zurück in die Schiffchenbahn geführt und beim Hineinführen das Schiffchen wieder geringfügig angehoben. Dank dieser Stillsetzung des Schiffchens wird der vom Schiffchen wegführende Schiffchenfaden eines nicht benötigten stillgelegten Schiffchens während des Stickens nicht zerstört.From the EP 1 055 761 B1 a shuttle embroidery machine with a driver bar unit is also known, with which the independent shutdown of each individual shuttle is made possible. By the Shutting down a shuttle prevents the cut thread end on the shutdown shuttle from being destroyed by the rapid up and down movement of the shuttle, or even literally being crushed, and consequently a safe stitching is no longer guaranteed. For the decommissioning of each individual boat, a pneumatic piston-cylinder unit is provided, with which the lower driver nail in the driver bar can be extended from the area of the boat train via an angle lever. The shuttle located in the respective shuttle track slides down slightly after the driver nail has been pulled out and is held in this position. For re-stitching, the pneumatic nail unit is used to guide the driver nail back into the shuttle train and to slightly raise the shuttle again when it is inserted. Thanks to this stopping of the shuttle, the shuttle thread leading away from the shuttle of an unneeded shuttle is not destroyed during embroidery.

Eine Aufgabe der vorliegenden Erfindung besteht nun darin, ein Verfahren und eine Vorrichtung zu schaffen, welche es ermöglichen, den Schiffchenfaden zwischen der Stichlochplatte und dem Stickboden mit der Stickerei nahe am Stickboden zu schneiden. Eine weitere Aufgabe besteht darin, das geschnittene Fadenende zwischen dem Schiffchen und dem Stickboden temporär festzuhalten bis die stillgesetzte Stickstelle wieder in Betrieb genommen wird.An object of the present invention is to provide a method and a device which make it possible to cut the shuttle thread between the needle plate and the embroidery base with the embroidery close to the embroidery base. Another task is to cut the thread end between the shuttle and hold the embroidery base temporarily until the stopped embroidery site is put back into operation.

Gelöst werden diese Aufgaben durch ein Verfahren zur Betätigung einer Fadenschneid- und Fadenklemmvorrichtung gemäss den Merkmalen des Patentanspruchs 1 sowie einer Vorrichtung gemäss den Merkmalen des Patentanspruchs 4.These tasks are solved by a method for actuating a thread cutting and thread clamping device according to the features of patent claim 1 and a device according to the features of patent claim 4.

Es gelingt auf kostengünstige und sichere Weise, den Schiffchenfaden an jeder Stickstelle einzeln nahe des Stickbodens abzuschneiden und im Bereich der Stichlochplatte das zum Schiffchen verlaufende Fadenende sicher festzuklemmen bis an der jeweiligen Stickstelle erneut weitergestickt wird. Durch die Verwendung des vorhandenen Pneumatikkolben-Zylindereinheit-Antriebs für das Stilllegen des Schiffchens durch Zurückziehen des Treibernagels kann die Fadenschneid- und Fadenklemmvorrichtung sicher und zeitlich präzise zwischen dem Stickboden mit der Stickerei und die Oberfläche der Stichlochplatte geführt und dort die beiden Handlungen, nämlich das Schneiden und das Festklemmen, vorgenommen werden. Der durchgetrennte Schiffchenfaden weist nur ein kurzes vom Stickboden wegragendes Fadenstück auf und das zweite Ende, welches zum Schiffchen verläuft, wird sicher festgehalten und kann daher während des weiteren Stickvorgangs der benachbarten Stickstellen nicht beschädigt werden. Der in der Klemmvorrichtung festgehaltene Faden ist jederzeit bereit zum Ansticken. Der Aufbau der Vorrichtung ist auch sehr kostengünstig herstellbar, da für das Zuschalten der Fadenschneid- und Fadenklemmvorrichtung ein Umschaltantrieb für eine Vielzahl, beispielsweise für 48 Stickstellen zusammengefasst verwendet werden kann. Mit anderen Worten, ein einziger Antrieb ermöglicht es, an beispielsweise 48 oder mehr Stellen, die Fadenschneid- und Fadenklemmanordnung zu betätigen. Nebst einer Kostenersparnis, nur einen Antrieb für 48 oder mehr Stickstellen, vereinfacht sich die Steuerung des Antriebs für das Schneiden und Klemmen und zudem wird weit weniger Raum benötigt und der Bereich der einzelnen Stickstellen auf der Schiffchenseite ist dadurch weniger verbaut.It is possible in a cost-effective and safe way to cut the shuttle thread individually at each embroidery site near the embroidery base and to securely clamp the thread end running to the shuttle in the area of the needle hole plate until embroidery is continued at the respective embroidery site. By using the existing pneumatic piston-cylinder unit drive to shut down the boat by pulling back the driver nail, the thread cutting and thread clamping device can be safely and precisely guided between the embroidery base with the embroidery and the surface of the needle plate and there the two actions, namely cutting and clamping. The severed shuttle thread has only a short piece of thread protruding from the embroidery base and the second end, which runs to the shuttle, is held securely and therefore cannot continue during the further embroidery process of the neighboring embroidery sites to be damaged. The thread held in the clamping device is ready to be sewn on at any time. The construction of the device can also be produced very inexpensively, since a switchover drive for a large number, for example for 48 embroidery sites, can be combined for switching on the thread cutting and thread clamping device. In other words, a single drive makes it possible to actuate the thread cutting and thread clamping arrangement at, for example, 48 or more locations. In addition to a cost saving, only one drive for 48 or more embroidery points, the control of the drive for cutting and clamping is simplified and, in addition, far less space is required and the area of the individual embroidery points on the shuttle side is therefore less obstructed.

Anhand eines Ausführungsbeispiels wird die Erfindung näher erläutert. Es zeigen:

Figur 1
einen Vertikalschnitt durch die Stichlochplatte einer Grossstickmaschine, den Treiberbalken und die Vorrichtung zum Stilllegen eines einzelnen Schiffchens gemäss EP 1 055 761 ,
Figur 2
einen Querschnitt gemäss Fig. 1 mit zurückgezogenem unterem Treibernagel,
Figur 3
einen Querschnitt gemäss Fig. 1, jedoch mit dem Treiberbalken in angehobener Stellung,
Figur 4
eine Ansicht des Bereichs der Stichlochplatte, dem Treiberbalken und der Antriebe für das Stilllegen eines Schiffchens sowie, gemäss der vorliegenden Erfindung, der Anordnung zum Schneiden des Schiffchenfadens, nämlich der Fadenschneid- und Fangvorrichtung ausser Eingriff,
Figur 5
einen Querschnitt durch den Bereich der Stichlochplatte, den Treiberbalken und die Antriebe für das Stilllegen eines Schiffchens sowie, gemäss der vorliegenden Erfindung, der Anordnung zum Schneiden des Schiffchenfadens, Fadenschneid- und Fangvorrichtung ausser Eingriff mit Faden vor dem Schneidvorgang mit eingekuppeltem Fadenschneider,
Figur 6
einen Querschnitt durch die Stichlochplatte der Schiffchenführung (Stöckli) mit dem Fadenschneider in Fadenfangposition,
Figur 7a
eine Seitenansicht einer Fadenschneideranordnung in geöffneter Stellung,
Figur 7b
eine Aufsicht auf die Fadenschneideranordnung der geöffneten Stellung in Figur 7a,
Figur 7c
eine Seitenansicht der Fadenschneideranordnung in geschlossener Stellung,
Figur 7d
eine Aufsicht auf die Fadenschneideranordnung der Figur 7c in geschlossener Stellung,
Figur 7e
eine Seitenansicht in einer Zwischenstellung der Fadenschneideranordnung,
Figur 7f
eine Aufsicht auf die Fadenschneideranordnung in einer Zwischenstellung der Figur 7e,
Figur 7g
ein perspektivisches Detail der Schneid- und Klemmteile in einer Zwischenstellung,
Figur 8
eine Aufsicht auf die Stichlochplatte, werkstückseitig und
Figur 9
einen schematischer Querschnitt durch das Stöckli und die Fadenschneid- und Fadenklemmvorrichtung 33 in Ruhestellung.
The invention is explained in more detail using an exemplary embodiment. Show it:
Figure 1
a vertical section through the needle plate of a large embroidery machine, the driver bar and the device for decommissioning a single boat according to EP 1 055 761 .
Figure 2
a cross section according to Fig. 1 with retracted lower driver nail,
Figure 3
a cross section according to Fig. 1 , but with the driver bar in the raised position,
Figure 4
2 shows a view of the area of the taphole plate, the driver bar and the drives for immobilizing a boat and, according to the present invention, the arrangement for cutting the boat thread, namely the thread cutting and catching device out of engagement,
Figure 5
2 shows a cross section through the area of the taphole plate, the driver bar and the drives for immobilizing a boat and, according to the present invention, the arrangement for cutting the boat thread, thread cutting and catching device out of engagement with the thread before the cutting process with the thread cutter engaged,
Figure 6
a cross section through the needle plate of the shuttle guide (Stöckli) with the thread cutter in the thread catching position,
Figure 7a
2 shows a side view of a thread cutter arrangement in the open position,
Figure 7b
a plan view of the thread cutter assembly of the open position in Figure 7a .
Figure 7c
a side view of the thread cutter assembly in the closed position,
Figure 7d
a plan of the thread trimmer assembly of the Figure 7c in the closed position,
Figure 7e
2 shows a side view in an intermediate position of the thread cutter arrangement,
Figure 7f
a plan view of the thread cutter assembly in an intermediate position Figure 7e .
Figure 7g
a perspective detail of the cutting and clamping parts in an intermediate position,
Figure 8
a top view of the needle plate, on the workpiece side and
Figure 9
a schematic cross section through the Stöckli and the thread cutting and thread clamping device 33 in the rest position.

In Figur 1 ist auf der linken Seite ein sich über die gesamte Länge einer Stickmaschine mit einer Vielzahl von Stickstellen sich erstreckende Treiberbalken 1 mit einem oberen Treibernagel 3 und einem unteren Treibernagel 5 sichtbar. Die beiden Treibernägel 3 und 5 sind beabstandet zu einer Stichlochplatte 7 mit einem Stichloch 72 und ragen mit deren Endbereichen 3' und 5' in eine Schiffchenbahn 9 eines Stöcklis 48 hinein. Der Treiberbalken 1 ist durch nicht dargestellte bekannte Antriebsmittel im Wesentlichen in vertikaler Richtung, z.B. 15° aus der Senkrechten geneigt, gemäss Pfeil P oszillierend verfahrbar ausgebildet.
Zum Stilllegen oder Stillsetzen eines Schiffchens 11 an der gewünschten Stickstelle der Stickmaschine kann der dort angeordnete untere Treibernagel 5, in den Figuren in horizontaler Richtung, gemäss Pfeil Z verschoben und aus der Schiffchenbahn 9 herausgezogen werden (Stellung gemäss Fig. 2). Das Schiffchen 11 wird danach vom Treiberbalken 1 nicht mehr in Bewegung versetzt, da der untere Treibernagel 5 beim Hochfahren das Schiffchen 11 nicht mehr kontaktiert. In Figur 1 ist der untere Treibernagel 5 eingeschoben und das Schiffchen 11 zwischen den beiden Treibernägeln 3 und 5 mit in der Figur 1 nicht sichtbarem Spiel gehalten.
In Figur 2 ist der untere Treibernagel 5 in Rückzugsposition, so dass das Schiffchen 11 etwas nach unten rutscht und dort in abgesenkter Position in der Schiffchenbahn 9 gehalten wird. Das Zurückziehen des unteren Treibernagels 5 erfolgt beispielsweise durch einen Winkelhebel 13, der an seinem Ellbogen 15 um eine Schwenkachse B schwenkbar getragen wird. Der kürzere Arm 17 des Winkelhebels 13 steht im Eingriff mit dem Ende der Kolbenstange 19 eines in einem Zylinder 21 verschiebbaren Kolbens 23. Der Kolben 23 kann durch ein Fluid, z.B. Druckluft, welche durch ein Ventil 25 in den unteren Zylinderraum eingeführt wird, gegen die Kraft einer Feder 27 nach oben bewegt werden (wie in Figuren 1 und 2 dargestellt). Im Stickbetrieb liegt der längere Arm 29 des Winkelhebels 13 auf der rechten Seite eines am unteren Treibernagel 5 befestigten radial abstehenden Fingers 31 etwas beabstandet.
Durch Absenken des Drucks in Zylinder 21 wird der Kolben 23 mit der Kolbenstange 19 durch die Feder 27 nach unten geführt und der Winkelhebel 13 schwenkt dadurch im Gegenuhrzeigersinn und zieht den unteren Treibernagel 5 aus dem Bereich der Schiffchenbahn 9 hinaus in die Stellung, wie sie in Figur 2 dargestellt ist. Der Winkelhebel 13 kann nach dem Zurückziehen des Treibernagels 5 und Hochheben des Treiberbalkens 1 wieder in die Ausgangsstellung geschwenkt werden. Das Schiffchen 11 kann in der Folge trotz oszillierender Bewegung des Treiberbalkens 1 in Richtung der Pfeile P durch fehlenden Eingriff des unteren Treibernagels 5 nicht mehr in der Schiffchenbahn 9 nach oben bewegt werden. Das Schiffchen 11 ist stillgesetzt.
In Figur 3 ist der Treiberbalken 1 in angehobener Stellung dargestellt, in welcher Stellung der Winkelhebel 13 während einer Schwenkbewegung im Gegenuhrzeigersinn ausserhalb dem Eingriff mit dem Finger 31 am unteren Treibernagel 5 liegt. Aus dieser Position lässt sich nach Absenken des Treiberbalkens 1 der Treibernagel 5 auch wieder in die Schiffchenbahn 9 hineinschieben.In Figure 1 a driver bar 1 with an upper driver nail 3 and a lower driver nail 5 extending over the entire length of an embroidery machine with a plurality of embroidery positions is visible on the left side. The two driver nails 3 and 5 are spaced apart from a tap hole plate 7 with a tap hole 72 and protrude with their end regions 3 'and 5' into a shuttle track 9 of a stick 48. The Driver bar 1 is designed to be movable in an oscillating manner according to arrow P, essentially in the vertical direction, for example inclined 15 ° from the vertical, by known drive means, not shown.
To shut down or stop a boat 11 at the desired embroidery point of the embroidery machine, the lower driver nail 5 arranged there can be moved in the figures in the horizontal direction according to arrow Z and pulled out of the boat track 9 (position according to Fig. 2 ). The boat 11 is then no longer set in motion by the driver bar 1, since the lower driver nail 5 no longer contacts the boat 11 when it is started up. In Figure 1 the lower driver nail 5 is inserted and the boat 11 between the two driver nails 3 and 5 in the Figure 1 held invisible game.
In Figure 2 the lower driver nail 5 is in the retracted position, so that the shuttle 11 slides down a little and is held there in the lowered position in the shuttle track 9. The lower driver nail 5 is pulled back, for example, by an angle lever 13 which is supported on its elbow 15 so as to be pivotable about a pivot axis B. The shorter arm 17 of the angle lever 13 is in engagement with the end of the piston rod 19 of a piston 23 which is displaceable in a cylinder 21. The piston 23 can be actuated by a fluid, for example compressed air, which flows through a valve 25 into the lower one Cylinder space is inserted, can be moved upward against the force of a spring 27 (as in Figures 1 and 2 ) Shown. In the embroidery mode, the longer arm 29 of the angle lever 13 is somewhat spaced on the right side of a radially protruding finger 31 attached to the lower driver nail 5.
By lowering the pressure in cylinder 21, the piston 23 with the piston rod 19 is guided downward by the spring 27 and the angle lever 13 thereby pivots counterclockwise and pulls the lower driver nail 5 out of the area of the shuttle track 9 into the position as shown in FIG Figure 2 is shown. The angle lever 13 can be pivoted back into the starting position after pulling back the driver nail 5 and lifting the driver bar 1. As a result, the shuttle 11 can no longer be moved upward in the shuttle track 9 despite the oscillating movement of the driver bar 1 in the direction of the arrows P due to the lack of engagement of the lower driver nail 5. The boat 11 is stopped.
In Figure 3 the driver bar 1 is shown in the raised position, in which position the angle lever 13 lies during a pivoting movement in the counterclockwise direction outside the engagement with the finger 31 on the lower driver nail 5. From this position, the driver nail 5 can also be pushed back into the shuttle track 9 after the driver bar 1 has been lowered.

Erfindungsgemäss wird in der untersten Stellung des Schiffchens 11 eine Fadenklemm- und Schneidvorrichtung 33 betätigt (vergl. Fig. 4-6, 9). Deren Antrieb erfolgt gemäss Figur 4 und Figur 5 mit einem am langen Arm 29 des Winkelhebels 13 einklinkbaren Pleuel 35. Der Pleuel 35 ist auf einer Welle 37 an einer Wippe 39 für die Fadenklemm- und Schneidvorrichtung 33 einseitig schwenkbar gelagert. Das andere freie Ende 36 des Pleuels 35 liegt auf dem Ausleger 42 einer Hub-Vorrichtung 46 auf. Die Hub-Vorrichtung 46 erstreckt sich über eine Mehrzahl, z.B. 48 Stickstellen und ermöglicht es, den oder die Pleuel 35 an den Stickstellen aus einem formschlüssigen Verbindungselement 49 mit dem langen Arm 29 des Winkelhebels 13 zu lösen (Fig. 4) bzw. in diesen einzurasten (Fig. 5). Das Verbindungselement 49 umfasst beispielsweise eine halbkreisförmige, einseitig offene Ausnehmung 50 im Pleuel 35 an dessen Unterseite und einen zylindrischen Nocken 52, welcher seitlich vom langen Arm 29 abstehend ausgebildet ist (vergl. auch Figur 5). Vorzugsweise wird mittels einer Schenkelfeder 69 der Pleuel 35 auf den Nocken 52 oder den Ausleger 42 der Vorrichtung 46 gedrückt gehalten, so lange als das freie Ende 36 des Pleuels 35 nicht durch die Vorrichtung 46 angehoben wird.
Ist der Nocken 52 am Winkelhebel 13 in der Ausnehmung 50 des Pleuels 35 eingeschoben, so kann mit dem Winkelhebel 13 und dem Pleuel 35 die Fadenfang- und Schneidvorrichtung 33 um eine an deren unteren Ende ausgebildeten Schwenkachse A vor- bzw. zurückgeschwenkt werden. Ist der lange Arm 29 am Winkelhebel 13, wie eingangs beschrieben, nicht mit dem Pleuel 35 verbunden, so dient der lange Arm 29 zum Vor- oder Rückschieben des unteren Treibernagels 5. Die Fadenschneid- und Fadenklemmvorrichtung 33 ist dann ausser Eingriff.According to the invention, a thread clamping and cutting device 33 is actuated in the lowest position of the shuttle 11 (cf. Fig. 4-6 . 9 ). They are driven according to Figure 4 and Figure 5 with a connecting rod 35 that can be latched onto the long arm 29 of the angle lever 13. The connecting rod 35 is pivotally supported on one side on a shaft 37 on a rocker 39 for the thread clamping and cutting device 33. The other free end 36 of the connecting rod 35 lies on the boom 42 of a lifting device 46. The lifting device 46 extends over a plurality, for example 48, of embroidery points and makes it possible to detach the connecting rod (s) 35 at the embroidery points from a form-fitting connecting element 49 with the long arm 29 of the angle lever 13 ( Fig. 4 ) or to snap into it ( Fig. 5 ). The connecting element 49 comprises, for example, a semicircular, one-sided open recess 50 in the connecting rod 35 on its underside and a cylindrical cam 52, which is laterally projecting from the long arm 29 (cf. also Figure 5 ). The connecting rod 35 is preferably pressed onto the cam 52 or the extension arm 42 of the device 46 by means of a leg spring 69, as long as the free end 36 of the connecting rod 35 is not raised by the device 46.
If the cam 52 is pushed into the recess 50 of the connecting rod 35 on the angle lever 13, the thread catching and cutting device can be used with the angle lever 13 and the connecting rod 35 33 are pivoted forward or backward about a pivot axis A formed at the lower end thereof. If the long arm 29 on the angle lever 13, as described in the introduction, is not connected to the connecting rod 35, the long arm 29 serves to push the lower driver nail 5 forward or backward. The thread cutting and thread clamping device 33 is then disengaged.

Anhand der Figuren 6 und 7a-7g wird die Fadenschneid- und Fadenklemmvorrichtung 33 näher beschrieben. An der Wippe 39, die auf der Schwenkachse A mit einem Träger 73 der Stickmaschine verbunden ist, ragt ein Messerhebel 63 nach oben. Das obere Ende des Messerhebels 63 reicht in den Bereich zwischen die beiden Treibernägel 3 und 5 (im Schnitt gemäss Fig. 6 nicht gezeigt). Das obere Ende des Messerhebels 63 greift von unten in einen Schlitz 51 an einem ersten Klemmelement 47 und einem zweiten Messer 43 (siehe Fig. 7) einer Schneid- und Klemmanordnung 75 für den Schiffchenfaden 68. Die Schneid- und Klemmanordnung 75 umfasst ein erstes Messer 41 aus einem rechteckförmigen flachen Körper aus Metall, dessen hinteres Ende 70 T-förmig ausgebildet ist und dessen vorderes Ende eine Schneidkante 53 aufweist. Anliegend an das erste Messer 41 ist ein zweites Messer 43 angeordnet, dessen vorderes Ende hakenförmige ausgebildet ist und an der rückwärtigen Seite des hakenförmigen Teils eine Schneidkante 53' umfasst. Das zweite Messer 43 überragt das rückwärtige Ende 70 des ersten Messers 41 und endet in einer Ausnehmung 51. An das zweite Messer 43 schliesst ein zweites Klemmelement 45 an, dessen vorderes Ende ebenfalls hakenförmig ausgebildet ist und dessen hinteres Ende wie das zweite Messer 43 an seiner Unterseite einen Schlitz 51 umfasst. An das zweite Klemmelement 45 schliesst hinten und parallel liegend ein erstes Klemmelement 47 an, welches an seiner Vorderseite (rechts in den Figuren 7) eine rechtwinklig zu den Längskanten verlaufende Endkante aufweist und welches an seinem hinteren Ende 70 im Wesentlichen T-förmig ausgebildet ist.
Die beiden Messer 41,43 sowie die beiden Klemmelemente 45,47 liegen seitlich aneinander an und sind in einem rechteckigen Kanal 59 im Stöckli 48 gehalten (vergl. Fig. 6). Die beiden T-förmigen Endbereiche des zweiten Messers 43 und des zweiten Klemmelements 45 liegen seitlich am Stöckli 48 an und werden durch den Klemmhalter 67 an das Stöckli 48 angepresst. Die hinteren oder rückwärtigen Enden 70 des ersten Messers 41 und des ersten Klemmelements 47 überragen das Stöckli in Figur 6 auf der linken Seite und sind in Eingriff mit dem freien Ende des Messerhebels 63. Die vorderen hakenförmigen Enden des zweiten Messers 43 und des zweiten Klemmelements 45 überragen das Stöckli 48 und die in Figur 6 nicht eingezeichnete Stichlochplatte 7.Based on Figures 6 and 7a-7g the thread cutting and thread clamping device 33 will be described in more detail. On the rocker 39, which is connected to a support 73 of the embroidery machine on the pivot axis A, a knife lever 63 projects upwards. The upper end of the knife lever 63 extends into the area between the two driving nails 3 and 5 (in section according to Fig. 6 Not shown). The upper end of the knife lever 63 engages from below in a slot 51 on a first clamping element 47 and a second knife 43 (see Fig. 7 ) A cutting and clamping arrangement 75 for the shuttle thread 68. The cutting and clamping arrangement 75 comprises a first knife 41 made of a rectangular flat body made of metal, the rear end 70 of which is T-shaped and the front end of which has a cutting edge 53. A second knife 43 is arranged adjacent to the first knife 41, the front end of which is hook-shaped and comprises a cutting edge 53 'on the rear side of the hook-shaped part. The second knife 43 projects beyond the rear end 70 of the of the first knife 41 and ends in a recess 51. The second knife 43 is adjoined by a second clamping element 45, the front end of which is also hook-shaped and the rear end of which, like the second knife 43, comprises a slot 51 on its underside. A second clamping element 47 adjoins the second clamping element 45 at the rear and lying in parallel, which on its front side (on the right in FIG Figures 7 ) has an end edge running at right angles to the longitudinal edges and which is essentially T-shaped at its rear end 70.
The two knives 41, 43 and the two clamping elements 45, 47 abut each other laterally and are held in a rectangular channel 59 in the Stöckli 48 (cf. Fig. 6 ). The two T-shaped end regions of the second knife 43 and the second clamping element 45 lie laterally on the Stöckli 48 and are pressed against the Stöckli 48 by the clamp holder 67. The rear or rear ends 70 of the first knife 41 and the first clamping element 47 protrude beyond the stick Figure 6 on the left-hand side and are in engagement with the free end of the knife lever 63. The front hook-shaped ends of the second knife 43 and the second clamping element 45 protrude beyond the stick 48 and those in Figure 6 Needle plate 7 not shown.

Nachfolgend wird die Funktionsweise der Fadenschneid- und Fadenklemmvorrichtung 33 mit der oben beschriebenen Schneid- und Klemmanordnung 75 näher erläutert. Nach der Stilllegung des Schiffchens 11 einer bestimmten Stickstelle durch Zurückziehen des Treibernagels 5 aus der Schiffchenbahn 9, wie in Figur 2 dargestellt, wird durch Absenken des Auslegers 42 mit der Vorrichtung 46 der Pleuel 35 durch die Schenkelfeder 69 im Gegenuhrzeigersinn gedreht und die Ausnehmung 50 an der Unterseite des Pleuels 35 in den Bolzen 52 am langen Hebel 29 eingerastet. Die Schenkelfeder 69 sichert die Einrastung auch während der nachfolgenden Schneid- und Klemmoperation. Mit der Kolben- und Zylinderanordnung 21,23, mit welcher zuvor das Schiffchen 11 an der hier beschriebenen Stickstelle durch Zurückziehen des unteren Treibernagels 5 stillgesetzt worden ist, wird nun der Winkelhebel 13 im Uhrzeigersinn geschwenkt und dadurch über den Pleuel 35 die Wippe 39 um die Schwenkachse A ebenfalls im Uhrzeigersinn geschwenkt. Mit der Schwenkung der Wippe 39 schwenkt auch der daran befestigte Messerhebel 63 und schiebt das zweite Messer 43 und das zweite Klemmelement 45 nach rechts (siehe Fig. 6). Die hakenförmigen Enden des zweiten Messers 43 und des zweiten Klemmelements 45 überragen nun die Stichlochplatte 7 hinter dem Stickboden 79, welcher dadurch etwas nach rechts von der Stichlochplatte 7 abgehoben wird oder vorzugsweise zuvor durch einen Breithalter 77 (Figur 6) vom Stickboden 79 von der Stichlochplatte 7 beabstandet gehalten wird. Zum Fangen des vom Stickboden 79 (auf der rechten Seite des Fanghakens 54) zum Schiffchen 11 in der Schiffchenbahn 9 führenden Schiffchenfadens 68, wird das Gatter, auf welchem der Stickboden 79 aufgespannt ist derart verschoben, dass der Schiffchenfaden 68 vom Haken 54, gebildet aus den hakenförmigen Enden des zweiten Messers 43 und des zweiten Klemmelements 45, eingefangen wird (vergl. Fig. 8). Nun wird durch Schwenken des Winkelhebels 13 im Gegenuhrzeigersinn der Messerhebel 63 geschwenkt und dieser zieht mit seinem oberen Ende das zweite Messer 43 und das zweite Klemmelement 45 nach links und mit diesem auch den Schiffchenfaden 68 in Richtung auf die Stichlochplatte 7. Der Schiffchenfaden 68, welcher vom Stickboden 79 zum Schiffchen 11 führt, wird zuerst zwischen dem zweiten Klemmelement 45 und dem ersten Klemmelement 47 festgeklemmt. Der Schiffchenfaden 68 wird in weiterer Folge nun an der Schneidkante 53' am zweiten Messer 43 und der Schneidkante 53 des ersten Messers 41 durchgetrennt. Das weiterhin zum Stickboden 79 verlaufende Ende des Schiffchenfadens 68 ist nun als kurzes Schwänzchen frei vom Stickboden 79 wegragend. Der Schiffchenfaden 68 wird aus der Klemmung erst wieder freigegeben, sobald diese Stickstelle wieder in Betrieb genommen und damit auch das Schiffchen 11 wieder vom Treiberbalken 1 angetrieben wird.The operation of the thread cutting and thread clamping device 33 with the cutting and clamping arrangement 75 described above is explained in more detail below. After the shutdown of the boat 11 of a certain embroidery site by pulling the driver nail 5 out of the boat web 9, as in Figure 2 is shown, by lowering the boom 42 with the device 46, the connecting rod 35 is rotated counterclockwise by the leg spring 69 and the recess 50 on the underside of the connecting rod 35 is engaged in the bolt 52 on the long lever 29. The leg spring 69 also ensures that it engages during the subsequent cutting and clamping operation. With the piston and cylinder arrangement 21, 23, with which the shuttle 11 has previously been stopped at the embroidery site described here by pulling back the lower driver nail 5, the angle lever 13 is now pivoted clockwise and thereby the rocker 39 about the connecting rod 35 Swivel axis A also swiveled clockwise. When the rocker 39 is pivoted, the knife lever 63 attached to it also pivots and pushes the second knife 43 and the second clamping element 45 to the right (see Fig. 6 ). The hook-shaped ends of the second knife 43 and the second clamping element 45 now protrude beyond the needle plate 7 behind the embroidery base 79, which is thereby lifted slightly to the right from the needle plate 7 or preferably beforehand by a spreader 77 ( Figure 6 ) is held at a distance from the needle plate 79 by the needle plate 79. In order to catch the shuttle thread 68 leading from the embroidery base 79 (on the right side of the catch hook 54) to the shuttle 11 in the shuttle track 9, the gate on which the shuttle floor 79 is stretched is displaced such that the shuttle thread 68 is formed by the hook 54 the hook-shaped ends of the second knife 43 and the second clamping element 45, is captured (cf. Fig. 8 ). Now, by pivoting the angle lever 13 in the counterclockwise direction, the knife lever 63 is pivoted and this pulls with its upper end the second knife 43 and the second clamping element 45 to the left and with this also the shuttle thread 68 in the direction of the needle plate 7. The shuttle thread 68, which leads from the stick bottom 79 to the boat 11, is first clamped between the second clamping element 45 and the first clamping element 47. The shuttle thread 68 is subsequently cut at the cutting edge 53 'on the second knife 43 and the cutting edge 53 of the first knife 41. The end of the shuttle thread 68, which continues to the embroidery base 79, now protrudes freely from the embroidery base 79 as a short tail. The shuttle thread 68 is only released again from the clamping as soon as this embroidery site is put into operation again and thus the shuttle 11 is again driven by the driver bar 1.

Die Fadenschneid- und Fadenklemmvorrichtung 33 befindet sich nun in einer Position wie in Fig. 9 dargestellt. Die Blattfeder 65 am Messerhebel 63 stellt sicher, dass die Fadenschneid- und Fadenklemmanordnung 75 die Oberfläche der Stichlochplatte 7 nicht mehr überragt (Fig. 9).The thread cutting and thread clamping device 33 is now in a position as in FIG Fig. 9 shown. The leaf spring 65 on the knife lever 63 ensures that the thread cutting and thread clamping arrangement 75 no longer projects above the surface of the needle plate 7 ( Fig. 9 ).

Claims (13)

  1. A method for actuating a thread-cutting and thread-clamping apparatus (33) at any embroidery station of a large embroidery machine for cutting the shuttle thread (68) and for securing and clamping the end of the cut shuttle thread (68), having the following method steps of:
    - coupling the thread-cutting and thread-clamping apparatus (33) to an actuating apparatus (21,23) in order to stop a shuttle (11) by means of a lifting apparatus (46),
    - moving a thread-cutting and thread-clamping assembly (75) from one side of the needle plate (7) in the direction of the embroidery ground (79),
    - catching the shuttle thread (68) leading away from the shuttle (11),
    - moving the thread-cutting and thread-clamping assembly (75) back in the direction of the needle plate (7),
    - clamping the shuttle thread (68), and
    - cutting the shuttle thread (68) between a clamping point of the thread-cutting and thread-clamping assembly (75) and the stretched embroidery ground (79).
  2. The method according to Claim 1, characterized in that the thread-cutting and thread-clamping assembly (75) for catching, cutting and clamping the shuttle thread (68) is moved back by means of the actuating apparatus (21,23) through the needle plate (7) into a channel (59).
  3. The method according to any one of Claims 1 or 2, characterized in that the cutting and clamping assembly (75) is temporarily connected to the actuating apparatus (21,23), by interposing a connection rod (35), in order to shut down a lower driver pin (5) with the lifting device (46) which extends over a multiplicity of embroidery stations.
  4. A large embroidery machine, having a plurality of embroidery stations, comprising a lower (5) and an (3) upper driver pin for driving, in an oscillating manner, shuttles (11) in shuttle races (9) of a stöckli (48) on the back of a needle plate (7), further comprising suitable actuating apparatuses (21,23) for stopping individual shuttles (11) and an apparatus for actuating a thread-cutting and thread-clamping apparatus (33),
    characterized in that
    the actuating apparatus (21,23) for stopping a shuttle (11) by means of a lifting apparatus (46) is configured such that it is couplable to the thread-cutting and thread-clamping apparatus (33) with a connection rod (35).
  5. The large embroidery machine according to Claim 4,
    characterized in that
    the actuating apparatus (21,23) for stopping a shuttle (11) comprises a linear drive, with which an angle lever (13) is pivotable back and forth, and with which the lower driver pin (5) is able to be guided into the shuttle race (9) and out of the same.
  6. The large embroidery machine according to Claim 5,
    characterized in that
    the angle lever (13) with its first short arm (17) is articulated to the piston rod (19) of the linear drive and the long arm (29) of the angle lever (13) is able to be brought into engagement with the lower driver pin (5) when the driver bar (1) is lowered.
  7. The large embroidery machine according to Claim 6,
    characterized in that
    the connection rod (35) is connectable to the long arm (29) of the angle lever (13) and the thread-cutting and thread-clamping apparatus (33) is actuatable by pivoting the angle lever (13) with a jack (39) articulated to the embroidery machine.
  8. The large embroidery machine according to Claim 7,
    characterized in that
    a blade lever (63) is configured on the jack (39), a thread-cutting and thread-clamping assembly (75) being fixed to the upper, free end of said blade lever.
  9. The large embroidery machine according to any one of Claims 7 or 8, characterized in that the connection rod (35) is connectable to the angle lever (13) by pivoting about a pivot axis (37) configured on the thread-cutting and thread-clamping apparatus (33).
  10. The large embroidery machine according to Claim 9,
    characterized in that
    the connection rod (35) is pivoted with the lifting apparatus (46) which acts upon the free end of the connection rod (35) and which extends over a multiplicity of embroidery stations arranged next to one another.
  11. The large embroidery machine according to Claim 7,
    characterized in that
    the connection rod (35) is connected to the angle lever (13) by lowering the connection rod (35) to a cam (52) on the angle lever (13) .
  12. The large embroidery machine according to Claim 8 and any one of Claims 9 to 11, characterized in that the cutting and clamping assembly (75) is axially displaceable in a channel (59) in the stöckli (48) and in the needle plate (7).
  13. The large embroidery machine according to Claim 12,
    characterized in that the cutting and clamping assembly (75) comprises knives (41,43) which are displaceable relative to one another and clamping elements (45,47), wherein each knife and each clamping element have a hook-shaped end (64).
EP17709376.2A 2016-05-03 2017-02-22 Method for operating a thread cutter and thread clamping apparatus for cutting the shuttle thread in a large sticking machine, and apparatus for operating the thread cutter assembly for implementing the method Active EP3452653B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH00584/16A CH712431A1 (en) 2016-05-03 2016-05-03 Method for actuating a thread cutting and thread clamping device for cutting the shuttle thread on a large embroidery machine and a device for carrying out the method.
PCT/EP2017/054000 WO2017190862A1 (en) 2016-05-03 2017-02-22 Method for actuating a thread-cutting and thread-clamping device for cutting the shuttle thread on a large embroidery machine, and device for actuating the thread-cutting assembly in order to perform the method

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EP3452653B1 true EP3452653B1 (en) 2020-01-01

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KR (1) KR20190002457A (en)
CN (1) CN107923096B (en)
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KR20190002457A (en) 2019-01-08
TWI696736B (en) 2020-06-21
EP3452653A1 (en) 2019-03-13
CN107923096A (en) 2018-04-17
TW201739981A (en) 2017-11-16
WO2017190862A1 (en) 2017-11-09
CH712431A1 (en) 2017-11-15

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