EP0310778A1 - Needle thread cut off device for lockstitch sewing machines - Google Patents

Needle thread cut off device for lockstitch sewing machines Download PDF

Info

Publication number
EP0310778A1
EP0310778A1 EP88112509A EP88112509A EP0310778A1 EP 0310778 A1 EP0310778 A1 EP 0310778A1 EP 88112509 A EP88112509 A EP 88112509A EP 88112509 A EP88112509 A EP 88112509A EP 0310778 A1 EP0310778 A1 EP 0310778A1
Authority
EP
European Patent Office
Prior art keywords
hook
knife
rotary
needle thread
catch hook
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.)
Granted
Application number
EP88112509A
Other languages
German (de)
French (fr)
Other versions
EP0310778B1 (en
Inventor
Heinz-Georg Slomma
Rolf Zieschang
Hans-Rainer Gessmann
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.)
ZSK Stickmaschinen GmbH
Original Assignee
ZSK Stickmaschinen GmbH
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 ZSK Stickmaschinen GmbH filed Critical ZSK Stickmaschinen GmbH
Publication of EP0310778A1 publication Critical patent/EP0310778A1/en
Application granted granted Critical
Publication of EP0310778B1 publication Critical patent/EP0310778B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers

Definitions

  • the invention relates to a device for cutting off the needle thread of an embroidery, quilting or sewing machine with a rotary hook, bobbin case and bobbin, a hook knife movable in the path of the needle thread and a counter knife being provided.
  • Known devices of this type catch the needle thread (upper thread) to be cut in the space between the needle plate and the rotary hook. At a certain position of the rotary hook, the correct side of the needle thread loop and the lower thread are grasped, pulled to the counter knife and cut off. In the known devices, the hook knife is guided either parallel to the throat plate plane or in a pivoting movement around the rotary hook. In all cases, however, a relatively large distance between the throat plate and the rotary hook is required so that the correct needle thread loop and the lower thread can be caught and cut to some extent.
  • the object of the invention is therefore to provide a device of the type described at the beginning, with which only the needle thread (upper thread) is cut off.
  • the hook knife with its catch hook arranged at the free end can be moved into a recess between the rotary gripper and the coil housing and in that the counter knife is arranged at a distance from the rotary hook in the movement range of the catch hook.
  • the invention makes use of the fact that, in the case of customary designs of the left-handed rotary gripper and coil housing, a depression remains between these two components to the left of the gripper axis. The needle thread picked up by the catch hook of the rotary hook is also guided over the recess.
  • the needle thread is inserted into the catch hook of the hook knife during the rotary movement of the rotary hook and can thus be pulled out of the range of motion of the rotary hook and cut off on the counter knife.
  • the needle thread is cut off.
  • the lower thread can be cut with conventional devices in the space between the throat plate and rotary hook. This is not a problem because appropriate components require less space and the lower thread can be caught more safely in this room than the right side of the needle thread loop.
  • the use of the device according to the invention is particularly advantageous in embroidery machines if, after cutting the needle thread, embroidery is to be continued with a new color at the same location or with the same color at a nearby location. In these cases, less bobbin thread is used, because no new thread length is required for embroidering, and embroidering of the needle thread (upper thread) is safer because the lower thread is still tied to the embroidery base.
  • the hook knife can thus be guided on a path parallel to the rotary gripper axis.
  • the hook knife can also be pivoted about an axis perpendicular to the rotary gripper axis.
  • the hook knife is pivotable about an axis parallel to the throat plate.
  • the counter knife can be arranged stationary in the range of movement of the catch hook.
  • the catch hook can have a shear edge on its side interacting with the counter knife.
  • An embodiment is preferred which is characterized by a sequence of movements of the catch hook such that the catch hook is brought into a waiting position in front of the counter knife after the insertion of the needle thread and remains there until it reaches the shear edge of the counter knife after cutting the highest point for cutting the upper thread is led past.
  • a bracket 5 is attached to the machine frame 1 and extends in a plane perpendicular to the throat plate 2 parallel to and next to the axis 6 of the rotary gripper 3.
  • a swivel shaft 7 is mounted below the rotary gripper 3, on which sits a hook knife 8, which carries a catch hook 10 at its free, angled end 9, which is open at the bottom in the embodiment shown.
  • a counter knife 11 is arranged in a machine-fixed manner, the shear edge 12 of which cooperates with a shear edge of the catch hook 10 which is not shown in detail.
  • the rotary gripper 3 surrounds in a conventional manner a coil housing secured against rotation with a coil arranged therein. Between the rotary gripper 3 and the coil housing there is a depression 13 indicated in the drawing, which generally extends to the left of the center of the gripper.
  • the hook knife 8 or its catch hook 10 are arranged so that the catch hook 10, as shown in Figure 1, can engage in this recess 13.
  • the catch hook 10 engaging in the recess 13 is aligned in such a way that the needle thread (upper thread), which is gripped by the rotary gripper 3 and guided over the recess 13 during its rotational movement, is inserted into the catch hook 10. This State is shown in Figure 1.
  • the catch hook 10 After the needle thread has been inserted into the catch hook 10, the catch hook 10 is brought into a waiting position in front of the counter knife 12 (FIG. 2). The catch hook 10 with the inserted needle thread remains there until the thread transmitter (not shown) of the sewing machine has reached its highest point. The catch hook for cutting the needle thread is then guided past the shear edge 12 of the counter knife 11, as is shown in FIG. 3.
  • the hook knife 8 with the catch hook 10 is moved into the catch position shown in FIG. 1 at approximately 100 ° of the needle movement and into the position at approximately 230 ° of the needle movement Waiting position shown in Figure 2.
  • the cutting ( Figure 3) then takes place at approximately 420 ° of the needle movement.
  • the hook knife 8 with its catch hook 10 can be driven by a geared motor or by a stepping motor or also by cams. This is not shown in detail.

Landscapes

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

Abstract

Needle-thread cut-off device for an embroidering, quilting or sewing machine with rotary gripper (3), bobbin housing and bobbin, a hooked knife (8) movable into the path of the needle thread and a counterknife (11) being provided, only the upper thread being cut off by means of this device, the hooked knife being movable with its catch hook (10) located at the free end into a recess between the rotary gripper and bobbin housing, and the counterknife (11) being arranged at a distance from the rotary gripper in the region of movement of the catch hook. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Abschneiden des Nadelfadens einer Stick-, Stepp- oder Nähmaschine mit Umlaufgreifer, Spulengehäuse und Spule, wobei ein in die Bahn des Nadelfadens bewegbares Hakenmesser und ein Ge­genmesser vorgesehen sind.The invention relates to a device for cutting off the needle thread of an embroidery, quilting or sewing machine with a rotary hook, bobbin case and bobbin, a hook knife movable in the path of the needle thread and a counter knife being provided.

Bekannte Vorrichtungen dieser Gattung fangen den zu schneidenden Nadelfaden (Oberfaden) im Raum zwischen der Stichplatte und dem Umlaufgreifer. Bei einer bestimmten Stellung des Umlaufgreifers werden die richtige Seite der Nadelfadenschlaufe und der Unterfaden erfaßt, zum Gegen­messer gezogen und abgeschnitten. Bei den bekannten Vor­richtungen wird das Hakenmesser entweder parallel zur Stichplattenebene oder in einer Schwenkbewegung um den Umlaufgreifer geführt. In allen Fällen ist jedoch ein ver­hältnismäßig großer Abstand zwischen der Stichplatte und dem Umlaufgreifer erforderlich, damit einigermaßen sicher die richtige Nadelfadenschlaufe sowie der Unterfaden ge­fangen und geschnitten werden können.Known devices of this type catch the needle thread (upper thread) to be cut in the space between the needle plate and the rotary hook. At a certain position of the rotary hook, the correct side of the needle thread loop and the lower thread are grasped, pulled to the counter knife and cut off. In the known devices, the hook knife is guided either parallel to the throat plate plane or in a pivoting movement around the rotary hook. In all cases, however, a relatively large distance between the throat plate and the rotary hook is required so that the correct needle thread loop and the lower thread can be caught and cut to some extent.

Der Raum zwischen Stichplatte und Umlaufgreifer ist be­schränkt, so daß es in der Regel nicht mehr möglich ist, dort außer einer Vorrichtung zum Abschneiden auch noch einen Unterfadenwächter anzuordnen. In manchen Fällen ist es auch nachteilig, daß mit den bekannten Vorrichtungen der Nadelfaden nur zusammen mit dem Unterfaden geschnit­ten werden kann. Insbesondere bei Stickmaschinen kann es vorteilhaft sein, wenn nur der Nadelfaden geschnitten wird.The space between the throat plate and rotary hook is limited, so that it is usually no longer possible to arrange a bobbin thread monitor there in addition to a device for cutting off. In some cases it is also disadvantageous that with the known devices the needle thread can only be cut together with the lower thread. In the case of embroidery machines in particular, it can be advantageous if only the needle thread is cut.

Aufgabe der Erfindung ist es deshalb, eine Vorrichtung der eingangs beschriebenen Gattung anzugeben, mit der nur der Nadelfaden (Oberfaden) abgeschnitten wird.The object of the invention is therefore to provide a device of the type described at the beginning, with which only the needle thread (upper thread) is cut off.

Diese Aufgabe wird dadurch gelöst, daß das Hakenmesser mit seinem am freien Ende angeordneten Fanghaken in eine Vertiefung zwischen Umlaufgreifer und Spulenge­häuse bewegbar ist und daß das Gegenmesser mit Abstand vom Umlaufgreifer im Bewegungsbereich des Fanghakens angeordnet ist. Die Erfindung nutzt die Tatsache, daß bei üblichen Kostruktionen von linksdrehendem Umlaufgreifer und Spulengehäuse zwischen diesen beiden Bauteilen links von der Greiferachse eine Vertiefung verbleibt. Dabei wird der vom Fanghaken des Umlauf­greifers aufgenommene Nadelfaden auch über die Ver­tiefung geführt. Wird nun der Fanghaken des Hakenmessers bei entsprechender Ausrichtung in die Vertiefung ein­geführt, dann wird bei der Drehbewegung des Umlauf­greifers der Nadelfaden in den Fanghaken des Haken­messers eingelegt und kann damit aus dem Bewegungs­bereich des Umlaufgreifers herausgezogen sowie am Gegenmesser abgeschnitten werden.This object is achieved in that the hook knife with its catch hook arranged at the free end can be moved into a recess between the rotary gripper and the coil housing and in that the counter knife is arranged at a distance from the rotary hook in the movement range of the catch hook. The invention makes use of the fact that, in the case of customary designs of the left-handed rotary gripper and coil housing, a depression remains between these two components to the left of the gripper axis. The needle thread picked up by the catch hook of the rotary hook is also guided over the recess. If the catch hook of the hook knife is inserted into the recess with the appropriate orientation, the needle thread is inserted into the catch hook of the hook knife during the rotary movement of the rotary hook and can thus be pulled out of the range of motion of the rotary hook and cut off on the counter knife.

Erfindungsgemäß wird lediglich der Nadelfaden abge­schnitten. Der Unterfaden kann mit herkömmlichen Vor­richtungen im Raum zwischen Stichplatte und Umlauf­greifer abgeschnitten werden. Das ist unproblematisch, weil entsprechende Bauteile weniger Platz benötigen, und der Unterfaden in diesem Raum sicherer gefangen werden kann als die richtige Seite der Nadelfadenschlaufe.According to the invention, only the needle thread is cut off. The lower thread can be cut with conventional devices in the space between the throat plate and rotary hook. This is not a problem because appropriate components require less space and the lower thread can be caught more safely in this room than the right side of the needle thread loop.

Der Einsatz der erfindungsgemäßen Vorrichtung ist insbesondere bei Stickmaschinen vorteilhaft, wenn nach dem Schneiden des Nadelfadens an derselben Stelle mit einer neuen Farbe bzw. an einer naheliegenden Stelle mit derselben Farbe weitergestickt werden soll. In diesen Fällen wird weniger Unterfaden verbraucht, weil keine neue Fadenlänge zum Ansticken erforderlich ist, und das Ansticken des Nadelfadens ( Oberfadens) erfolgt sicherer, weil der Unterfaden noch am Stickgrund abgebunden ist.The use of the device according to the invention is particularly advantageous in embroidery machines if, after cutting the needle thread, embroidery is to be continued with a new color at the same location or with the same color at a nearby location. In these cases, less bobbin thread is used, because no new thread length is required for embroidering, and embroidering of the needle thread (upper thread) is safer because the lower thread is still tied to the embroidery base.

Für die Führung des Hakenmessers mit seinem Fanghaken bestehen mehrere Möglichkeiten, wenn nur sichergestellt ist, daß der in die Vertiefung eingreifende Fanghaken derart ausgerichtet ist, daß der Nadelfaden bei der Drehbewegung des Umlaufgreifers in den Fanghaken ein­gelegt wird. So kann das Hakenmesser auf einer zur Umlaufgreiferachse parallelen Bahn geführt sein. Das Hakenmesser kann aber auch um eine zur Umlaufgreifer­achse senkrechte Achse schwenkbar gelagert sein. Bei einer bevorzugten Ausführung ist das Hakenmesser um eine zur Stichplatte parallele Achse schwenkbar. In allen Fällen kann das Gegenmesser ortsfest im Bewegungs­bereich des Fanghakens angeordnet sein. Der Fanghaken kann auf seiner mit dem Gegenmesser zusammenwirkenden Seite eine Scherkante aufweisen.There are several options for guiding the hook knife with its catch hook, if only it is ensured that the catch hook engaging in the recess is oriented such that the needle thread is inserted into the catch hook during the rotary movement of the rotary hook. The hook knife can thus be guided on a path parallel to the rotary gripper axis. The hook knife can also be pivoted about an axis perpendicular to the rotary gripper axis. In a preferred embodiment, the hook knife is pivotable about an axis parallel to the throat plate. In all cases, the counter knife can be arranged stationary in the range of movement of the catch hook. The catch hook can have a shear edge on its side interacting with the counter knife.

Bevorzugt ist eine Ausführung, die gekennzeichnet ist durch einen Bewegungsablauf des Fanghakens derart, daß der Fanghaken nach dem Einlegen des Nadelfadens in eine Wartestellung vor dem Gegenmesser gebracht wird und dort verharrt, bis er nach Erreichen des Fadengeberhöchstpunktes zum Abschneiden des Oberfadens an der Scherkante des Gegenmessers vorbeigeführt wird.An embodiment is preferred which is characterized by a sequence of movements of the catch hook such that the catch hook is brought into a waiting position in front of the counter knife after the insertion of the needle thread and remains there until it reaches the shear edge of the counter knife after cutting the highest point for cutting the upper thread is led past.

Im folgenden wird ein in der Zeichnung dargestelltes Ausführungsbeispiel der Erfindung erläutert; es zeigen:

  • Fig. 1 teilweise die Seitenansicht einer Stickmaschine mit Stichplatte, Umlaufgreifer und Vorrichtung zum Abschneiden des Nadelfadens, Fanghaken in Fangposition,
  • Fig. 2 den Gegenstand nach Figur 1, Fanghaken in Warte­position vor der Schneidkante des Gegenmessers,
  • Fig. 3 den Gegenstand nach Figur 1, Fanghaken in End­position nach dem Schneiden.
In the following an embodiment of the invention shown in the drawing is explained; show it:
  • 1 is a partial side view of an embroidery machine with needle plate, rotary hook and device for cutting the needle thread, catch hook in the catch position,
  • 2 the object of Figure 1, catch hook in the waiting position in front of the cutting edge of the counter knife,
  • Fig. 3 shows the object of Figure 1, catch hook in the end position after cutting.

In der Zeichnung ist lediglich das Maschinengestell 1 der Stickmaschine teilweise sowie die darauf angeord­nete Stichplatte 2, der am Maschinengestell 1 gelagerte Umlaufgreifer 3 und seine Antriebswelle 4 dargestellt. Am Maschinengestell 1 ist eine Konsole 5 befestigt, die sich in einer zur Stichplatte 2 senkrechten Ebene parallel zur und neben der Achse 6 des Umlaufgreifers 3 erstreckt. An der Konsole 5 ist unterhalb des Umlauf­greifers 3 eine Schwenkwelle 7 gelagert, auf der ein Hakenmesser 8 sitzt, welches an seinem freien, abge­winkelten Ende 9 einen Fanghaken 10 trägt, der bei der dargestellten Ausführung nach unten offen ist. Im Bewegungsbereich des Fanghakens 10 ist maschinenfest ein Gegenmesser 11 angeordnet, dessen Scherkante 12 mit einer im einzelnen nicht wiedergegebenen Scherkante des Fanghakens 10 zusammenwirkt.In the drawing, only the machine frame 1 of the embroidery machine and the needle plate 2 arranged thereon, the rotary hook 3 mounted on the machine frame 1 and its drive shaft 4 are shown. A bracket 5 is attached to the machine frame 1 and extends in a plane perpendicular to the throat plate 2 parallel to and next to the axis 6 of the rotary gripper 3. On the console 5, a swivel shaft 7 is mounted below the rotary gripper 3, on which sits a hook knife 8, which carries a catch hook 10 at its free, angled end 9, which is open at the bottom in the embodiment shown. In the range of motion of the catch hook 10, a counter knife 11 is arranged in a machine-fixed manner, the shear edge 12 of which cooperates with a shear edge of the catch hook 10 which is not shown in detail.

Der Umlaufgreifer 3 umgibt in üblicher Weise ein gegen Verdrehen gesichertes Spulengehäuse mit darin angeordneter Spule. Zwischen dem Umlaufgreifer 3 und dem Spulen­gehäuse befindet sich eine in der Zeichnung angedeutete Vertiefung 13, die sich in der Regel links von der Greifermitte erstreckt. Das Hakenmesser 8 bzw. sein Fanghaken 10 sind so angeordnet, daß der Fanghaken 10, wie in Figur 1 dargestellt, in diese Vertiefung 13 eingreifen kann. Der in die Vertiefung 13 eingreifende Fanghaken 10 ist derart ausgerichtet, daß der vom Umlaufgreifer 3 erfaßte und bei seiner Drehbewegung auch über die Vertiefung 13 geführte Nadelfaden (Ober­faden) in den Fanghaken 10 eingelegt wird. Dieser Zustand ist in Figur 1 wiedergegeben.The rotary gripper 3 surrounds in a conventional manner a coil housing secured against rotation with a coil arranged therein. Between the rotary gripper 3 and the coil housing there is a depression 13 indicated in the drawing, which generally extends to the left of the center of the gripper. The hook knife 8 or its catch hook 10 are arranged so that the catch hook 10, as shown in Figure 1, can engage in this recess 13. The catch hook 10 engaging in the recess 13 is aligned in such a way that the needle thread (upper thread), which is gripped by the rotary gripper 3 and guided over the recess 13 during its rotational movement, is inserted into the catch hook 10. This State is shown in Figure 1.

Nach dem Einlegen des Nadelfadens in den Fanghaken 10 wird der Fanghaken 10 in eine Wartestellung vor dem Gegenmesser 12 gebracht (Figur 2). Der Fanghaken 10 mit dem eingelegten Nadelfaden verharrt dort solange, bis der nicht dargestellte Fadengeber der Nähmaschine seinen höchsten Punkt erreicht hat. Dann wird der Fanghaken zum Abschneiden des Nadelfadens an der Scher­kante 12 des Gegenmessers 11 vorbeigeführt, wie das in Figur 3 dargestellt ist.After the needle thread has been inserted into the catch hook 10, the catch hook 10 is brought into a waiting position in front of the counter knife 12 (FIG. 2). The catch hook 10 with the inserted needle thread remains there until the thread transmitter (not shown) of the sewing machine has reached its highest point. The catch hook for cutting the needle thread is then guided past the shear edge 12 of the counter knife 11, as is shown in FIG. 3.

Bezogen auf den Nadelhub, wobei die oberste Position der Nadel mit 0° bezeichnet wird, wird das Hakenmesser 8 mit dem Fangkaken 10 bei ca. 100° der Nadelbewegung in die in Figur 1 dargestellte Fangposition eingefahren und bei ca. 230° der Nadelbewegung in die in Figur 2 dargestellte Wartestellung. Das Schneiden ( Figur 3) erfolgt dann bei ca. 420° der Nadelbewegung.Based on the needle stroke, the uppermost position of the needle being designated 0 °, the hook knife 8 with the catch hook 10 is moved into the catch position shown in FIG. 1 at approximately 100 ° of the needle movement and into the position at approximately 230 ° of the needle movement Waiting position shown in Figure 2. The cutting (Figure 3) then takes place at approximately 420 ° of the needle movement.

Das Hakenmesser 8 mit seinem Fanghaken 10 kann durch einen Getriebemotor oder durch einen Schrittmotor oder auch durch Kurvenscheiben angetrieben sein. Das ist im einzelnen nicht dargestellt.The hook knife 8 with its catch hook 10 can be driven by a geared motor or by a stepping motor or also by cams. This is not shown in detail.

Claims (8)

1. Vorrichtung zum Abschneiden des Nadelfadens einer Stick-, Stepp- oder Nähmaschine mit Umlaufgreifer, Spu­lengehäuse und Spule, wobei ein in die Bahn des Na­delfadens bewegbares Hakenmesser und ein Gegenmesser vorgesehen sind, dadurch gekennzeichnet, daß das Ha­kenmesser (8) mit seinem am freien Ende (9) angeord­neten Fanghaken (10) in eine Vertiefung (13) zwischen Umlaufgreifer (3) und Spulengehäuse bewegbar ist und daß das Gegenmesser (11) mit Abstand vom Umlaufgrei­fer (3) im Bewegungsbereich des Fanghakens (10) ange­ordnet ist.1. Device for cutting the needle thread of an embroidery, quilting or sewing machine with a rotary hook, bobbin case and bobbin, wherein a hook knife movable in the path of the needle thread and a counter knife are provided, characterized in that the hook knife (8) with its free End (9) arranged catch hook (10) in a recess (13) between the rotary gripper (3) and the coil housing is movable and that the counter knife (11) is arranged at a distance from the rotary gripper (3) in the range of movement of the catch hook (10). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der in die Vertiefung (13) eingreifende Fanghaken (10) derart ausgerichtet ist, daß der Nadelfaden bei der Drehbewegung des Umlaufgreifers (3) in den Fang­haken (10) eingelegt wird.2. Device according to claim 1, characterized in that the catch hook (10) engaging in the recess (13) is oriented such that the needle thread is inserted into the catch hook (10) during the rotary movement of the rotary hook (3). 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekenn­zeichnet, daß das Hakenmesser (8) auf einer zur Achse (6) des Umlaufgreifers (3) parallelen Bahn geführt ist.3. Apparatus according to claim 1 or 2, characterized in that the hook knife (8) is guided on a path parallel to the axis (6) of the rotary gripper (3). 4. Vorrichtung nach Anspruch 1 oder 2, dadurch gekenn­zeichnet, daß das Hakenmesser (8) um eine zur Achse (6) des Umlaufgreifers (3) senkrechte Achse (7) schwenkbar gelagert ist.4. Apparatus according to claim 1 or 2, characterized in that the hook knife (8) about an axis (6) of the rotary gripper (3) perpendicular axis (7) is pivotally mounted. 5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß das Hakenmesser (8) um eine zur Stichplatte (2) parallele Achse (7) schwenkbar ist.5. The device according to claim 4, characterized in that the hook knife (8) about a throat plate (2) parallel axis (7) is pivotable. 6. Vorrichtung nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, daß der Fanghaken (10) auf seiner mit dem Gegenmesser (11) zusammenwirkenden Seite eine Scherkante aufweist.6. Device according to one of claims 1-5, characterized in that the catch hook (10) on its side with the counter knife (11) cooperating side has a shear edge. 7. Vorrichtung nach einem der Ansprüche 1 - 6, dadurch gekennzeichnet, daß das Gegenmesser (11) ortsfest ange­ordnet ist.7. Device according to one of claims 1-6, characterized in that the counter knife (11) is arranged stationary. 8. Vorrichtung nach einem der Ansprüche 1 - 7, gekenn­zeichnet durch einen Bewegungsablauf des Fanghakens (10) derart, daß der Fanghaken (10) nach dem Einlegen des Nadelfadens in eine Wartestellung vor dem Gegenmes­ser (11) gebracht wird und dort verharrt, bis er nach Erreichen des Fadengeberhöchstpunktes zum Abschneiden des Nadelfadens an der Scherkante (12) des Gegenmes­sers (11) vorbeigeführt wird.8. Device according to one of claims 1-7, characterized by a sequence of movements of the catch hook (10) such that the catch hook (10) is brought into a waiting position in front of the counter knife (11) after insertion of the needle thread and remains there until it after reaching the highest point of the thread feeder to cut the needle thread past the shearing edge (12) of the counter knife (11).
EP88112509A 1987-09-04 1988-08-02 Needle thread cut off device for lockstitch sewing machines Expired - Lifetime EP0310778B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8711977U 1987-09-04
DE8711977U DE8711977U1 (en) 1987-09-04 1987-09-04 Device for cutting the needle thread of an embroidery, quilting or sewing machine

Publications (2)

Publication Number Publication Date
EP0310778A1 true EP0310778A1 (en) 1989-04-12
EP0310778B1 EP0310778B1 (en) 1991-10-16

Family

ID=6811742

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88112509A Expired - Lifetime EP0310778B1 (en) 1987-09-04 1988-08-02 Needle thread cut off device for lockstitch sewing machines

Country Status (2)

Country Link
EP (1) EP0310778B1 (en)
DE (2) DE8711977U1 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1340721A (en) 1961-12-11 1963-10-18 Singer Mfg Co Bobbin thread renewal mechanism for shuttle stitch sewing machine
US3424116A (en) 1965-08-25 1969-01-28 Union Special Maschinenfab Thread cutoff device for lockstitch sewing machines

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1340721A (en) 1961-12-11 1963-10-18 Singer Mfg Co Bobbin thread renewal mechanism for shuttle stitch sewing machine
US3424116A (en) 1965-08-25 1969-01-28 Union Special Maschinenfab Thread cutoff device for lockstitch sewing machines

Also Published As

Publication number Publication date
DE8711977U1 (en) 1987-10-15
DE3865621D1 (en) 1991-11-21
EP0310778B1 (en) 1991-10-16

Similar Documents

Publication Publication Date Title
DE102007048344A1 (en) Sequin conveyor and sewing machine for sewing sequins
DE1941681A1 (en) Thread cutting device on lockstitch sewing machines
DE2938894C2 (en) Embroidery machine
DE4018829A1 (en) THREAD CUTTER IN A STITCHING MACHINE
DE2638264C3 (en) Sewing machine for making preliminary or decorative stitches on fabric
DE2025397A1 (en) sewing machine
DE1760703A1 (en) Device for the simultaneous cutting of sewing threads in a sewing machine
DE19746653C1 (en) Sewing machine thread cutting
DE1485341A1 (en) Chain stitch device for lockstitch sewing machines
DE1813057B2 (en) Additional device for a button sewing machine
DE7143508U (en) DEVICE TO FACILITATE THE REMOVAL OF SPOOLED REELS AND DEPLOYMENT OF EMPTY REEL CORES
EP0310778A1 (en) Needle thread cut off device for lockstitch sewing machines
DE4125949C2 (en) Device for forming loops on a sausage sealing machine
DE60221172T2 (en) Sewing machine for the production of serial stitches
EP2025790A2 (en) Transporter for transporting sewing material while operating a sewing machine
DE3519851C1 (en) Blindstitch sewing machine
DE804750C (en) Bag closing machine
DE2743727C3 (en) Device for cutting the needle and bobbin thread on an automatic sewing machine
DE2013581A1 (en) Thread trimmer on double chainstitch sewing machines
DE2252577A1 (en) METHOD FOR AUTOMATIC STITCHING AND MACHINE FOR CARRYING OUT THE PROCEDURE
DE3218108A1 (en) SEWING MACHINE
DE3427593A1 (en) DEVICE FOR ADJUSTING THE LOCATION OF A UPPER HOOK HOOK ON A MACHINE FOR USEFUL SEWING
DE2025364C3 (en) Sewing machine for lock stitches with interchangeable lock stitch or. Chain stitch needle plates
DE3303033A1 (en) Two-thread lockstitch shuttle for a sewing machine
DE1485396C (en) Machine for attaching thread loops to a textile material

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 GR IT

17P Request for examination filed

Effective date: 19890426

17Q First examination report despatched

Effective date: 19900824

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB GR IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19911016

Ref country code: GB

Effective date: 19911016

Ref country code: FR

Effective date: 19911016

REF Corresponds to:

Ref document number: 3865621

Country of ref document: DE

Date of ref document: 19911121

ITF It: translation for a ep patent filed

Owner name: UFFICIO BREVETTI RICCARDI & C.

EN Fr: translation not filed
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19990914

Year of fee payment: 12

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050802