EP0479838B1 - Automatic bobbin-winding machine, in particular for lockstitch machines - Google Patents

Automatic bobbin-winding machine, in particular for lockstitch machines Download PDF

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Publication number
EP0479838B1
EP0479838B1 EP90909625A EP90909625A EP0479838B1 EP 0479838 B1 EP0479838 B1 EP 0479838B1 EP 90909625 A EP90909625 A EP 90909625A EP 90909625 A EP90909625 A EP 90909625A EP 0479838 B1 EP0479838 B1 EP 0479838B1
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EP
European Patent Office
Prior art keywords
bobbin
change head
machine according
gripper
full
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
EP90909625A
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German (de)
French (fr)
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EP0479838A1 (en
Inventor
Peter Reinders
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.)
Carl Schmale GmbH and Co
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Carl Schmale GmbH and Co
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Filing date
Publication date
Application filed by Carl Schmale GmbH and Co filed Critical Carl Schmale GmbH and Co
Priority to AT90909625T priority Critical patent/ATE93285T1/en
Publication of EP0479838A1 publication Critical patent/EP0479838A1/en
Application granted granted Critical
Publication of EP0479838B1 publication Critical patent/EP0479838B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B59/00—Applications of bobbin-winding or -changing devices; Indicating or control devices associated therewith
    • D05B59/04—Devices for changing the bobbin

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

Abstract

An automatic bobbin-winding machine, in particular for lockstitch machines, comprises a changing head (27) with pneumatically driven gripping levers (30, 31) for removing the lower part (35) of the bobbin case holder from the sewing machine. The changing head (27) can pivot or oscillate about various axes (39, 40, 41) and move on a carriage (26). It co-operates with a magazine (22) arranged alongside the axis (39). A second changing head (27') which can pick up empty and full bobbins (2) alternately may also be arranged on the carriage (26).

Description

Die Erfindung betrifft eine Maschine zum automatischen Auswechseln von Unterfadenspulen, insbesondere für Steppstichnähmaschinen, mit einer durch pneumatische Zylinder betätigbaren Vorrichtung zum Entnehmen einer leeren Spule aus einem Spulenkapsel-Unterteil der Nähmaschine, zum Entnehmen einer vollen Spule aus einem Magazin und zum Transferieren dieser vollen Spule in die Nähmaschine, wobei die pneumatischen Zylinder Schlitten betätigen, auf denen Greiferhebel bzw. ein Spulenträger sitzen, die damit quer verfahrbar sind.The invention relates to a machine for the automatic replacement of bobbin threads, in particular for lockstitch sewing machines, with a device which can be actuated by pneumatic cylinders for removing an empty bobbin from a bobbin case lower part of the sewing machine, for removing a full bobbin from a magazine and for transferring this full bobbin into the sewing machine, the pneumatic cylinders actuating slides on which gripper levers or a bobbin are seated and which can thus be moved transversely.

Im Zuge der Automatisierung von Nähanlagen sind Spulautomaten entwickelt worden, die ein selbstätiges Bewickeln von Unterfadenspulen an Nähmaschinen bewirken. Das automatische Bewickeln der Unterfadenspulen bedingt aber, um effektiv zu sein, auch einen automatischen Spulenwechsel.In the course of the automation of sewing systems, automatic winder machines have been developed which automatically wind bobbins on sewing machines. However, the automatic winding of the lower thread bobbins also requires an automatic bobbin change to be effective.

Einen solchen automatischen Spulenwechsler zeigt die US-PS 33 76 838. Dabei dient ein pneumatisch schwenkbarer und elektromagnetisch ausfahrbarer Greiferhebel zur Entnahme der Spule aus dem Spulenkapselträger der Nähmaschine, während ein schlittenförmiger Spulenträger pneumatisch zwischen dem Magazin und der Nähstation hin- und herfahrbar ist.Such an automatic bobbin changer is shown in US Pat. No. 3,376,838. A pneumatically pivotable and electromagnetically extendable gripper lever serves to remove the bobbin from the bobbin case carrier of the sewing machine, while a sled-shaped bobbin carrier can be pneumatically moved back and forth between the magazine and the sewing station.

Eine Steuereinrichtung überwacht das zeitgerechte Arbeiten der einzelnen Bauteile. Die Vorrichtung ist vergleichsweise sperrig und seitlich weit ausladend, so daß ihr Anbau an der Nähmaschine Schwierigkeiten bereitet.
Die US-PS 26 90 725 betrifft ebenfalls einen automatischen Spulenwechsler, bei dem eine hin- und hergehende Schaltwelle, die durch einen Pneumatik-Zylinder betätigt wird, an ihrem Ende einen Greiferklauenträger aufweist. Dieser ist um die Achse der Schaltwelle drehbar und mit Aufnahmevorrichtungen zum Erfassen der Spulen versehen.A control device monitors the timely operation of the individual components. The device is comparatively bulky and widely protruding laterally, so that it is difficult to attach it to the sewing machine.
The US-PS 26 90 725 also relates to an automatic spool changer, in which a reciprocating shift shaft, which is actuated by a pneumatic cylinder, has a gripper claw carrier at its end. This is rotatable about the axis of the selector shaft and provided with receiving devices for detecting the coils.

Durch die Drehung des Greiferklauenträgers erfolgt das Transferieren der vollen bzw. leeren Spulen. Die Vorrichtung weist viele komplizierte Einselteile auf und ist aufwendig in der Herstellung.The full or empty spools are transferred by rotating the gripper claw carrier. The device has many complicated individual parts and is complex to manufacture.

Der Erfindung liegt die Aufgabe zugrunde, eine Maschine zum automatischen Auswechseln von Unterfadenspulen zu schaffen, die in Verbindung mit einem Spulenaufwickelautomaten bei schnellaufenden Industrie-Nähmaschinen einsetzbar ist und sich durch hohe Zuverlässigkeit, kompakte Bauweise und einfachen Aufbau auszeichnet.The invention has for its object to provide a machine for the automatic replacement of bobbin, which can be used in connection with a bobbin winder in high-speed industrial sewing machines and is characterized by high reliability, compact design and simple structure.

Zur Lösung dieser Aufgabe dienen die im Anspruch 1 gekennzeichnet Merkmale. Die Unteransprüche enthalten zweckmäßige weite Ausbildungen.
Durch die erfindungsgemäße Maschine ist es möglich, auch bei schnellaufenden Industrie-Nähmaschinen ein selbsttätiges Auswechseln leerer Unterfadenspulsen gegen volle Spulen zu bewerkstelligen.The features characterized in claim 1 serve to achieve this object. The subclaims contain expedient broad training.
The machine according to the invention makes it possible to automatically replace empty bobbin threads for full bobbins even in high-speed industrial sewing machines.

Ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung ist in den Zeichnungen dargestellt.
Es zeigen:

Fig. 1
eine Ansicht des Wechselkopfes der Maschine in Draufsicht;
Fig. 2
eine schematische Ansicht von zusätzlichen Einrichtungen am Magazin.
An embodiment of the device according to the invention is shown in the drawings.
Show it:
Fig. 1
a view of the replaceable head of the machine in plan view;
Fig. 2
a schematic view of additional facilities on the magazine.

Figur 1 zeigt in Draufsicht den Wechselkopf 27 der Maschine, der den wesentlichsten Teil darstellt. Der Wechselkopf 27 arbeitet zusammen mit einem Spulen-Magazin 22 (Fig. 2), indem er daraus volle Spulen 2 entnimmt und nach einer pneumatisch bewirkten Drehung um eine senkrechte Drehachse 40 des Wechselkopfes 27 mit seiner Längsachse 39 in die Achse des Greifers (Spulenkapselträger) der Nähmaschine einschwenkt und die volle Spule 2 mit dem Spulenkapselträger-Unterteil 35 einsetzt. In gleicher Weise umgekehrt erfolgt dieser Vorgang bei der Entnahme einer leeren Spule aus der Nähmaschine. Der Wechselkopf 27 ist auf einem Schlitten 26 seitlich herausfahrbar, d.h. von der Nähmaschine in Achsrichtung 39 wegfahrbar. Er besteht aus zwei pneumatischen Zylindern 28, 29, die auf je einen zweiarmigen Greiferhebel 30, 31 wirken, wobei die Greiferhebel 30, 31 von Federn 32, 33 belastet sind, die das Öffnen der Greiferhebel 30, 31 bewirken, während die pneumatischen Zylinder 28, 29 zum Schließen der Greiferhebel 30, 31 dienen. Der Wechselkopf 27 hat eine Aufnahme 34 für den Spulenkapselträger 35. In dieser Aufnahme 34 ist ein federnder Wellenansatz 37 angeordnet. Durch entsprechende Betätigung der pneumatischen Zylinder 28,29 können die zweiarmigen Greiferhebel 30, 31 wahlweise einzeln oder auch gemeinsam betätigt werden. Bei Betätigung nur des rechten Greiferhebels 31 erfolgt die Lösung der Verbindung (z.B. einer Klinke 38) zwischen den beiden Teilen, aus denen der Spulenkapselträger üblicherweise besteht, so daß der Spulenkapselträger-Unterteil 35 mit der Spule 2 aus der Nähmaschine entnehmbar ist.Figure 1 shows a plan view of the replaceable head 27 of the machine, which is the most important part. The Exchangeable head 27 works together with a spool magazine 22 (FIG. 2) by taking full spools 2 from it and after a pneumatically effected rotation about a vertical axis of rotation 40 of the exchangeable head 27 with its longitudinal axis 39 in the axis of the gripper (bobbin case carrier) The sewing machine swings in and the full bobbin 2 with the bobbin case carrier lower part 35 is inserted. In the same way, the reverse occurs when an empty bobbin is removed from the sewing machine. The interchangeable head 27 can be moved out laterally on a carriage 26, ie it can be moved away from the sewing machine in the axial direction 39. It consists of two pneumatic cylinders 28, 29, each of which acts on a two-armed gripper lever 30, 31, the gripper levers 30, 31 being loaded by springs 32, 33 which cause the gripper levers 30, 31 to open, while the pneumatic cylinders 28 , 29 serve to close the gripper levers 30, 31. The interchangeable head 27 has a receptacle 34 for the bobbin case carrier 35. A resilient shaft extension 37 is arranged in this receptacle 34. By appropriately actuating the pneumatic cylinders 28, 29, the two-armed gripper levers 30, 31 can be actuated either individually or together. When only the right gripper lever 31 is actuated, the connection (for example a pawl 38) is released between the two parts of which the bobbin case carrier usually consists, so that the bobbin case carrier lower part 35 with the bobbin 2 can be removed from the sewing machine.

Der Wechselkopf 27 ist um eine waagerechte Achse 41 kippbar angeordnet. Auf dem Schlitten 26 kann in der Längsachse 39 oder auch in einem Winkel dazu ein zweiter Wechselkopf 27' angeordnet sein, wodurch es möglich wird, beim Ausschwenken des ersten Wechselkopfes 27 mit einer leeren Spule 2 im Spulenkapselträger-Unterteil 35 einen weiteren Spulenkapselträger-Unterteil 35' mit einer vollen Spule 2' einzusetzen.The interchangeable head 27 is arranged to be tiltable about a horizontal axis 41. A second interchangeable head 27 ′ can be arranged on the slide 26 in the longitudinal axis 39 or at an angle to it, which makes it possible to swivel the first interchangeable head 27 with an empty bobbin 2 in the bobbin case carrier lower part 35 and a further bobbin case carrier lower part 35 'with a full spool 2'.

Der Wechselkopf 27 ist weiter um seine Längsachse 39 mittels eines pneumatischen Stellzylinders 42 drehbar, um den Faden der Spule 2 in den Spulenkapselträger-Unterteil 35 einfädeln zu können.The interchangeable head 27 can be rotated further about its longitudinal axis 39 by means of a pneumatic adjusting cylinder 42 in order to be able to thread the thread of the bobbin 2 into the lower part 35 of the bobbin case carrier.

Figur 2 zeigt in schematischer Darstellung zusätzliche Einrichtungen am Magazin. Beim Schwenken um seine senkrechte Achse 40 übergibt der Wechselkopf 27 die leere Spule 2 an eine Magazinstange 57, worauf der Wechselkopf 27 zur Seite 58 des Magazins 22 für volle Spulen 2 schwenkt, um eine volle Spule zu greifen. Seitlich an diesem Magazin 22 ist eine Saugdüse 61 angebracht, die den aus dem Schlitz 59 heraushängenden Faden ansaugt. Zwischen dem Magazin 22 und der Saugdüse 61 ist eine Zange 62 vorgesehen, die pneumatisch zu betätigen ist und den Faden derart spannt, daß bei einem Schwenken des Wechselkopfes 27 um 90° der Faden selbsttätig eingefädelt wird. Die pneumatische Zange 62 führt darauf eine Bewegung zur Freigabe des Fadens aus, worauf der Wechselkopf 27 nach einer 90°-Schwenkung die volle Spule 2 in die Nähmaschine einsetzt.Figure 2 shows a schematic representation of additional facilities on the magazine. When swiveling about its vertical axis 40, the exchangeable head 27 transfers the empty spool 2 to a magazine rod 57, whereupon the exchangeable head 27 swivels to the side 58 of the magazine 22 for full spools 2 in order to grip a full spool. A suction nozzle 61 is attached to the side of this magazine 22 and sucks in the thread hanging out of the slot 59. Between the magazine 22 and the suction nozzle 61, a pair of pliers 62 is provided which can be actuated pneumatically and tensions the thread in such a way that the thread is automatically threaded when the interchangeable head 27 is pivoted through 90 °. The pneumatic pliers 62 then perform a movement to release the thread, whereupon the interchangeable head 27 inserts the full bobbin 2 into the sewing machine after a 90 ° swivel.

Claims (10)

  1. A machine for automatically changing lower thread bobbins, more particularly for lockstitch sewing machines having a device actuable by pneumatic cylinders for removing an empty bobbin from a bobbin case base of the sewing machine, for removing a full bobbin from a magazine and for transferring said full bobbin to the sewing machine, the pneumatic cylinders actuating carriages on which gripper levers or a bobbin carrier are disposed which are movable transversely together therewith, characterized in that disposed on the carriage (26) is a change head (27) which can be moved out in the axial direction (39) laterally of the sewing machine;
    the change head (27) can be pivoted inwards on the carriage (26) in the axial direction (29) into an axis of rotation (40) perpendicular to the axis of the gripper of the sewing machine, and
    the change head (27) has a holder (34) having a resilient shaft attachment (37) for the bobbin case carrier base (35) and two two-armed gripper levers (30, 31) which cooperate with the bobbin case carrier base (35) and can be actuated by the pneumatic cylinders (28, 29).
  2. A machine according to claim 1, characterized in that the gripper levers (30, 31) are loaded by springs (32, 33) which effect the opening of the gripper levers (30, 31), while the gripper levers (30, 31) are closed via the pneumatic cylinders (28, 29).
  3. A machine according to claims 1 or 2, characterized in that the gripper levers (30, 31) can be optionally actuated individually or jointly.
  4. A machine according to one of claims 1 to 3, characterized in that one gripper lever (31) has at its free end a device for releasing the connection, taking the form of a latch (38) between the two parts of the bobbin case carrier (35).
  5. A machine according to one of claims 1 to 4, characterized in that the rotation of the change head (27) around the axis of rotation (40) is performed pneumatically.
  6. A machine according to one of claims 1 to 5, characterized in that the change head (27) can be tilted around a horizontal axis (41).
  7. A machine according to one of claims 1 to 6, characterized in that the change head (27) can be rotated around its longitudinal axis (39) by means of a pneumatic adjusting cylinder (42), to enable the thread of the bobbin (2) to be threaded into the bobbin case carrier base (35).
  8. A machine according to one of claims 1 to 7, characterized in that disposed on the carriage (26) in the longitudinal axis (39) or at an angle thereto is a second change head (27') which, when the first change head (27) with an empty bobbin (2) in the bobbin case carrier base (25) is pivoted outwards, enables a further bobbin case carrier base (35') with a full bobbin (2') to be inserted when the change head (27) rotates.
  9. A machine according to one of claims 1 to 8, characterized in that during rotation around its vertical axis (40), the change head (27) transfers the empty bobbin (2) to a magazine rod (47), whereafter the change head (27) pivots to the side (58) of the magazine (22) for full bobbins (2), to grip a full bobbin (2).
  10. A machine according to one of claims 1 to 9, characterized in that a suction nozzle (61) which sucks in the thread hanging out of the slot (59) is disposed on the magazine (22);
    pneumatically actuated tongs (62) so tension the thread that it is threaded in when the change head (27) is pivoted through 90°, and
    the pneumatic tongs (62) perform a movement to release the thread, whereafter the change head (27) inserts the full bobbin (2) into the sewing machine.
EP90909625A 1989-06-22 1990-06-20 Automatic bobbin-winding machine, in particular for lockstitch machines Expired - Lifetime EP0479838B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90909625T ATE93285T1 (en) 1989-06-22 1990-06-20 MACHINE FOR AUTOMATIC REPLACEMENT OF BOBBINS, ESPECIALLY FOR LOCKSTITCH SEWING MACHINES.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3920461 1989-06-22
DE3920461 1989-06-22
DE3943467 1989-06-22
DE3943467 1989-06-22

Publications (2)

Publication Number Publication Date
EP0479838A1 EP0479838A1 (en) 1992-04-15
EP0479838B1 true EP0479838B1 (en) 1993-08-18

Family

ID=25882226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90909625A Expired - Lifetime EP0479838B1 (en) 1989-06-22 1990-06-20 Automatic bobbin-winding machine, in particular for lockstitch machines

Country Status (6)

Country Link
EP (1) EP0479838B1 (en)
AU (1) AU5920290A (en)
BR (1) BR9007444A (en)
DE (1) DE59002404D1 (en)
ES (1) ES2044600T3 (en)
WO (1) WO1990015894A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW262494B (en) * 1993-08-31 1995-11-11 Zyuki Kk
IT1274445B (en) * 1995-05-08 1997-07-17 Osvaldo Vezzoli CONTROL FOR THE AUTOMATIC CHANGE OF THE LOWER THREAD REEL, FOR SEWING MACHINES
DE102016005166A1 (en) * 2016-04-30 2017-11-02 Pfaff Industriesysteme Und Maschinen Gmbh Sewing machine with a bobbin case changing device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2438459A (en) * 1945-06-16 1948-03-23 Richard Walsh Mcgann Sewing machine
NL93071C (en) * 1951-08-09
US3376838A (en) * 1966-02-01 1968-04-09 Ivanhoe Res Corp Bobbin changer for sewing machines
US3981256A (en) * 1975-05-09 1976-09-21 J. P. Stevens & Co., Inc. Magnetic automatic bobbin changer for sewing machines

Also Published As

Publication number Publication date
EP0479838A1 (en) 1992-04-15
ES2044600T3 (en) 1994-01-01
BR9007444A (en) 1992-06-16
AU5920290A (en) 1991-01-08
DE59002404D1 (en) 1993-09-23
WO1990015894A1 (en) 1990-12-27

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