EP0342555B1 - Sewing machine using automatic separation of the sewn articles - Google Patents

Sewing machine using automatic separation of the sewn articles Download PDF

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Publication number
EP0342555B1
EP0342555B1 EP89108624A EP89108624A EP0342555B1 EP 0342555 B1 EP0342555 B1 EP 0342555B1 EP 89108624 A EP89108624 A EP 89108624A EP 89108624 A EP89108624 A EP 89108624A EP 0342555 B1 EP0342555 B1 EP 0342555B1
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EP
European Patent Office
Prior art keywords
sewing
cutting device
sewn
pressure plate
sewing machine
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
EP89108624A
Other languages
German (de)
French (fr)
Other versions
EP0342555A1 (en
Inventor
Helmut Schips
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.)
Schips AG Nahautomationen
Schips AG Naehautomation
Original Assignee
Schips AG Nahautomationen
Schips AG Naehautomation
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 Schips AG Nahautomationen, Schips AG Naehautomation filed Critical Schips AG Nahautomationen
Publication of EP0342555A1 publication Critical patent/EP0342555A1/en
Application granted granted Critical
Publication of EP0342555B1 publication Critical patent/EP0342555B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D05B29/00—Pressers; Presser feet
    • D05B29/06—Presser feet
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/04—Lower casings
    • D05B73/12—Slides; Needle plates

Definitions

  • a sewing machine with the features (a), (b) and (c) specified at the outset is known from document FR-A-2 379 635.
  • this sewing machine measured in the direction of the sewing axis - the ends of the fabric pusher and the pressure plate are a little closer to the sewing needle position than the cutting point of the cutting device.
  • the invention relieves the operator of the described, time-consuming handling activity. There is an increase in productivity.
  • the sewing machine is technically very simple.
  • the piece of sewn fabric that is sewn in each case is transported on without the operator's intervention and without the use of any additional conveying devices, and the thread chain between successive pieces of sewing material is cut automatically.
  • the operator can devote himself to preparing the next piece of sewing material.
  • the completion of the sewing process on the previous piece of material to be sewn and the transfer of the sewn piece of sewn material take place automatically without the operator having to monitor this in particular and to intervene in order to transport the sewn piece of sewn material onward. Further transport of the piece of sewing material after the thread chain has been severed to other processing stations is also possible automatically.
  • the fabric slide extended on one side and the pressure plate elongated on one side cause a tendency of the respective piece of sewing material to move obliquely forward sideways to the cutting device, the thread chain between this sewing material piece and the subsequent sewing material piece being relaxed. As a result, the suction of the thread chain to the cutting device is facilitated.
  • a needle plate 2 is embedded in its working surface 1. This takes on a fabric pusher 3. Furthermore, as seen in the direction V of the material feed, a wedge-shaped projection 2.1 pointing in the same direction is formed on the right long side of the needle plate 2.
  • the free-running section of the attachment 2.1 is separated from the actual needle plate 2 by a slot 4 located in the sewing axis A, into which the sewing needle 5 of the sewing machine engages to form the thread structure or the thread chain F.
  • a pressure plate 6 of a presser foot 7 of the sewing machine which can be raised and lowered, cooperates with the fabric slide 3.
  • a cutting device 8 with an integrated suction device, aligned parallel to the sewing axis A, is arranged along the right long side of the work surface 1.
  • the suction opening 10 of the suction device is aligned at right angles to the feed direction V.
  • the fabric slide 3 and the pressure plate 6 each have an extension 12 or 14 on their side facing away from the cutting device 8 in the direction V of the material feed, so that they extend from the operating side of the sewing machine (below viewed in FIG. 2), extend to the level of the cutting edge 8.1 of the cutting device 8.
  • the plane of the cutting edge 8.1 is at right angles to the feed direction V.
  • the extension 12 or 14 is approximately 20% of the previously usual overall length l u of the fabric slide 3 or the pressure plate 6.
  • FIGS. 1 and 2 show a finished, sewn piece of sewing material N immediately after the thread formation F has been separated by the cutting edge 8.1 of the cutting device 8.
  • FIG of the sewing process from which monitoring by the operator is no longer necessary and the operator can concentrate on the preparation of the next piece of sewing material N.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

A sewing machine capable of automatically severing a thread chain between successive pieces of sewing material includes a cutting device provided behind a sewing needle in a feed direction of the sewing material, a suction device for sucking the thread chain toward the cutting device, and a feeder and a cooperating pressure plate of a presser foot which each have a projection extending in the feed direction such that the cutting device and the ends of the feeder and the presser plate lie substantially in one plane.

Description

Gegenstand der Erfindung ist eine Nähmaschine mit einer Einrichtung zum selbsttätigen Durchtrennen der Fadenkette zwischen aufeinanderfolgenden Nähgutstücken, aufweisend folgende Merkmale:

  • (a) einen Stoffschieber und eine Drückerfuß-Druckplatte, die sich seitlich der Nähachse jeweils mit einem vorderen Bereich über die Nähnadelposition hinaus weiter nach vorn in Nähgutvorschubrichtung erstrecken;
  • (b) eine Schneideinrichtung, die auf der den vorderen Bereichen des Stoffschiebers und der Druckplatte entgegengesetzten Seite seitlich gegenüber der Nähachse versetzt und in Nähgutvorschubrichtung weiter vorn als die Nähnadelposition angeordnet ist; und
  • (c) eine der Schneideinrichtung zugeordnete Saugeinrichtung, um die zwischen zwei aufeinanderfolgenden Nähgutstücken befindliche Fadenkette zur Seite und zu der Schneideinrichtung zu saugen, dadurch gekennzeichnet,
  • (d) daß jeweils in dem vorderen Bereich sowohl der Stoffschieber als auch die Druckplatte an der von der Schneideinrichtung entfernteren Seite eine sich in Nähgutvorschubrichtung erstreckende Verlängerung aufweisen;
  • (e) und daß - in Richtung der Nähachse gemessendie Enden der Verlängerungen sowie die Schneidstelle der Schneideinrichtung im wesentlichen den gleichen Abstand von der Nähnadelposition haben.
The invention relates to a sewing machine with a device for automatically severing the thread chain between successive pieces of sewing material, having the following features:
  • (a) a fabric pusher and a presser foot pressure plate, each of which extends to the side of the sewing axis with a front region beyond the sewing needle position and further forward in the material feed direction;
  • (b) a cutting device which is laterally offset from the sewing axis on the side opposite the front regions of the fabric slide and the pressure plate and is arranged further forward than the sewing needle position in the material feed direction; and
  • (c) a suction device assigned to the cutting device in order to suck the thread chain located between two successive pieces of sewing material to the side and to the cutting device, characterized in that
  • (d) that in each case in the front area both the fabric pusher and the pressure plate on the side remote from the cutting device have an extension extending in the direction of the material feed;
  • (e) and that - measured in the direction of the sewing axis, the ends of the extensions and the cutting point of the cutting device are at substantially the same distance from the sewing needle position.

Bei bekannten, mit einer Einrichtung zum selbsttätigen Durchtrennen der Fadenkette ausgestatteten Nähmaschine muß jeweils das fertiggenähte Nähstück, nachdem seine Hinterkante das Ende des Stoffschiebers und der Druckplatte des Drückerfußes passiert hat, nach vorn zu der Schneideinrichtung gezogen werden. Dadurch wird die Arbeitsfläche der Nähmaschine für das nachfolgende Nähgutstück freigemacht. Während die Bedienungsperson jeweils ein fertiggenähtes Nähgutstück von Hand der Schneideinrichtung zuführt, ist sie an der Weiterführung der eigentlichen Näharbeit gehindert.In known sewing machines equipped with a device for automatically severing the thread chain, the sewn piece after the trailing edge has passed the end of the fabric pusher and the pressure plate of the presser foot must be pulled forward to the cutting device. This clears the work surface of the sewing machine for the next piece of sewing material. While the operator feeds a piece of sewn fabric by hand to the cutting device, he is prevented from continuing the actual sewing work.

Eine Nähmaschine mit den eingangs angegebenen Merkmalen (a), (b) und (c) ist aus dem Dokument FR-A-2 379 635 bekannt. Bei dieser Nähmaschine sind - in Richtung der Nähachse gemessen - die Enden des Stoffschiebers und der Druckplatte ein Stück näher an der Nähnadelposition als die Schneidstelle der Schneideinrichtung.A sewing machine with the features (a), (b) and (c) specified at the outset is known from document FR-A-2 379 635. In this sewing machine - measured in the direction of the sewing axis - the ends of the fabric pusher and the pressure plate are a little closer to the sewing needle position than the cutting point of the cutting device.

Durch die Erfindung ist die Bedienungsperson von der geschilderten, Zeit erfordernden Handhabungstätigkeit entlastet. Es ergibt sich eine Produktivitätssteigerung. Die Nähmaschine ist technisch sehr einfach aufgebaut.The invention relieves the operator of the described, time-consuming handling activity. There is an increase in productivity. The sewing machine is technically very simple.

Bei der erfindungsgemäßen Nähmaschine wird das jeweils fertiggenähte Nähgutstück ohne Zutun der Bedienungsperson und ohne Verwendung irgendwelcher zusätzlicher Fördereinrichtungen weitertransportiert, und die Fadenkette zwischen aufeinanderfolgenden Nähgutstücken wird selbsttätig durchtrennt. Bereits dann, wenn die Hinterkante eines jeweiligen Nähgutstücks etwa ein Drittel der Länge des Stoffschiebers und der Druckplatte von deren hinterem Ende aus durchlaufen hat, kann sich die Bedienungsperson der Vorbereitung des nächstfolgenden Nähgutstücks widmen. Die Fertigstellung des Nähvorgangs am vorherigen Nähgutstück und die Weitergabe des fertiggenähten Nähgutstücks erfolgen selbsttätig, ohne daß die Bedienungsperson dies besonders überwachen und zwecks Weitertransports des fertiggenähten Nähgutstücks eingreifen muß. Auch ein Weitertransport des Nähgutstücks nach der Durchtrennung der Fadenkette zu weiteren Bearbeitungsstationen ist selbsttätig möglich.In the sewing machine according to the invention, the piece of sewn fabric that is sewn in each case is transported on without the operator's intervention and without the use of any additional conveying devices, and the thread chain between successive pieces of sewing material is cut automatically. Already when the rear edge of a respective piece of sewing material has passed through about a third of the length of the fabric pusher and the pressure plate from its rear end, the operator can devote himself to preparing the next piece of sewing material. The completion of the sewing process on the previous piece of material to be sewn and the transfer of the sewn piece of sewn material take place automatically without the operator having to monitor this in particular and to intervene in order to transport the sewn piece of sewn material onward. Further transport of the piece of sewing material after the thread chain has been severed to other processing stations is also possible automatically.

Der einseitig verlängerte Stoffschieber und die einseitig verlängerte Druckplatte bewirken eine Tendenz des jeweiligen Nähgutstücks, sich schräg nach vorn seitlich zu der Schneideinrichtung zu bewegen, wobei die Fadenkette zwischen diesem Nähgutstück und dem nachfolgenden Nähgutstück entspannt wird. Infolgedessen ist das Ansaugen der Fadenkette an die Schneideinrichtung erleichtert.The fabric slide extended on one side and the pressure plate elongated on one side cause a tendency of the respective piece of sewing material to move obliquely forward sideways to the cutting device, the thread chain between this sewing material piece and the subsequent sewing material piece being relaxed. As a result, the suction of the thread chain to the cutting device is facilitated.

Die Erfindung wird beispielsweise anhand einer bevorzugten Ausführungsform gemäß der Zeichnung näher erläutert.The invention is explained in more detail, for example, using a preferred embodiment according to the drawing.

Es zeigen

Figur 1
die Arbeitsfläche einer Nähmaschine zusammen mit den erfindungsgemäß ausgeführten Maschinenteilen Stoffschieber und Druckplatte des Drückerfußes in Seitenansicht; und
Figur 2
eine Draufsicht auf den Arbeitsbereich der Nähmaschine gemäß Figur 1.
Show it
Figure 1
the work surface of a sewing machine together with the machine parts fabric slide and pressure plate of the presser foot according to the invention in side view; and
Figure 2
a plan view of the working area of the sewing machine according to Figure 1.

Im Arbeitsbereich der Nähmaschine nach den Figuren 1 und 2 ist in deren Arbeitsfläche 1 eine Nadelplatte 2 eingebettet. Diese nimmt einen Stoffschieber 3 auf. Es ist ferner, in Richtung V des Nähgutvorschubs gesehen, an der rechten Längsseite der Nadelplatte 2 ein in die gleiche Richtung weisender, keilförmiger Ansatz 2.1 ausgebildet. Der freiverlaufende Abschnitt des Ansatzes 2.1 ist von der eigentlichen Nadelplatte 2 durch einen in der Nähachse A liegenden Schlitz 4 getrennt, in den die Nähnadel 5 der Nähmaschine zur Ausbildung des Fadengebildes bzw. der Fadenkette F eingreift. In der Figur 1 ist über dem Stoffschieber 3 eine mit diesem zusammenwirkende Druckplatte 6 eines heb- und absenkbaren Drückerfußes 7 der Nähmaschine veranschaulicht. Schließlich ist eine Schneidvorrichtung 8 mit integrierter Saugvorrichtung, parallel zur Nähachse A ausgerichtet, der rechten Längsseite der Arbeitsfläche 1 entlang angeordnet. Die Saugöffnung 10 der Saugvorrichtung ist rechtwinklig zur Vorschubrichtung V ausgerichtet.In the working area of the sewing machine according to FIGS. 1 and 2, a needle plate 2 is embedded in its working surface 1. This takes on a fabric pusher 3. Furthermore, as seen in the direction V of the material feed, a wedge-shaped projection 2.1 pointing in the same direction is formed on the right long side of the needle plate 2. The free-running section of the attachment 2.1 is separated from the actual needle plate 2 by a slot 4 located in the sewing axis A, into which the sewing needle 5 of the sewing machine engages to form the thread structure or the thread chain F. In FIG. 1, a pressure plate 6 of a presser foot 7 of the sewing machine, which can be raised and lowered, cooperates with the fabric slide 3. Finally, a cutting device 8 with an integrated suction device, aligned parallel to the sewing axis A, is arranged along the right long side of the work surface 1. The suction opening 10 of the suction device is aligned at right angles to the feed direction V.

Wie aus den Figuren 1 und 2 ersichtlich, weisen der Stoffschieber 3 und die Druckplatte 6 jeweils auf ihrer der Schneidvorrichtung 8 abgewandten Seite in Richtung V des Nähgutvorschubs eine Verlängerung 12 bzw. 14 auf, so daß sie sich, von der Bedienungsseite der Nähmaschine (unten in Figur 2) her betrachtet, bis zur Ebene der Schneide 8.1 der Schneidvorrichtung 8 erstrecken. Die Ebene der Schneide 8.1 liegt rechtwinklig zur Vorschubrichtung V. Die Verlängerung 12 bzw. 14 beträgt etwa 20% der bisher üblichen Baulänge lu des Stoffschiebers 3 bzw. der Druckplatte 6.As can be seen from FIGS. 1 and 2, the fabric slide 3 and the pressure plate 6 each have an extension 12 or 14 on their side facing away from the cutting device 8 in the direction V of the material feed, so that they extend from the operating side of the sewing machine (below viewed in FIG. 2), extend to the level of the cutting edge 8.1 of the cutting device 8. The plane of the cutting edge 8.1 is at right angles to the feed direction V. The extension 12 or 14 is approximately 20% of the previously usual overall length l u of the fabric slide 3 or the pressure plate 6.

Die Figuren 1 und 2 zeigen ein weiterbefördertes, fertiggenähtes Nähgutstück N unmittelbar nach der Abtrennung des Fadengebildes F durch die Schneide 8.1 der Schneidvorrichtung 8. Es stellen in der Figur 1 ferner die strichpunktierten Umrisse des hinteren Teils eines Nähgutstücks N diejenige Position des Nähgutstücks N im Verlaufe des Nähvorganges dar, ab welcher keine Überwachung durch die Bedienungsperson mehr notwendig ist und diese sich auf die Vorbereitung des nächstkommenden Nähgutstücks N konzentrieren kann.FIGS. 1 and 2 show a finished, sewn piece of sewing material N immediately after the thread formation F has been separated by the cutting edge 8.1 of the cutting device 8. In FIG of the sewing process, from which monitoring by the operator is no longer necessary and the operator can concentrate on the preparation of the next piece of sewing material N.

In der gezeichneten Position des Nähgutstücks N besteht zwischen dessen Hinterkante und der Hinterkante der Druckplatte 6 ein Abstand, der etwa 1/3 der Baulänge lD der Druckplatte 6 beträgt.In the drawn position of the workpiece N, there is a distance between its rear edge and the rear edge of the pressure plate 6, which is approximately 1/3 of the overall length l D of the pressure plate 6.

Claims (1)

  1. A sewing machine with a device for the automatic division of the warp (F) between successive sewn articles (N), having the following features:
    (a) a fabric slider (3) and a trigger base pressure plate (6) which extend laterally of the sewing axis (A) in each case with a front region over the sewing needle position (5) further out at the front in the feed direction (V) of the sewn goods;
    (b) a cutting device (8) which is displaced laterally relative to the sewing axis (A) on the side opposite the front region of the fabric slider (3) and the pressure plate (6) and is arranged further forward than the sewing needle position (5) in the feed direction (V) of the sewn goods;
    (c) and a suction device associated with the cutting device (8) in order to suck the warp (F) located between two successive sewn articles (N) to the side and to the cutting device (8),
    characterised in that
    (d) in each case in the front region both the fabric slider (3) and the pressure plate (8) have on the side distant from the cutting device an extension (12,14) extending in the feed direction (V) of the sewn goods;
    (e) and that - measured in the direction of the sewing axis (A) - the ends of the extensions (12,14) as well as the cutting position of the cutting device (8) are at substantially the same distance from the sewing needle position (5).
EP89108624A 1988-05-17 1989-05-12 Sewing machine using automatic separation of the sewn articles Expired - Lifetime EP0342555B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3816782A DE3816782A1 (en) 1988-05-17 1988-05-17 SEED MATERIAL WITH THREAD SEPARATION
DE3816782 1988-05-17

Publications (2)

Publication Number Publication Date
EP0342555A1 EP0342555A1 (en) 1989-11-23
EP0342555B1 true EP0342555B1 (en) 1995-01-18

Family

ID=6354540

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89108624A Expired - Lifetime EP0342555B1 (en) 1988-05-17 1989-05-12 Sewing machine using automatic separation of the sewn articles

Country Status (5)

Country Link
US (1) US5027733A (en)
EP (1) EP0342555B1 (en)
JP (1) JP2698427B2 (en)
AT (1) ATE117384T1 (en)
DE (2) DE3816782A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2591525Y2 (en) * 1991-05-29 1999-03-03 横浜ゴム株式会社 Crawler shoe
US5261733A (en) * 1991-05-29 1993-11-16 The Yokohama Rubber Co., Ltd. Shoe of crawler belt or chain
CN103510292B (en) * 2012-06-28 2015-06-17 星锐缝纫机(嘉兴)有限公司 Sewing machine with automatic electromagnetic cutting device
JP2016054830A (en) * 2014-09-08 2016-04-21 Ykk株式会社 Sewing machine foot

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7247361U (en) * 1973-04-19 Duerkoppwerke Gmbh Sewing machine for sewing consecutive workpieces
US3046919A (en) * 1959-11-27 1962-07-31 Bemis Bro Bag Co Automatic thread clipper for bag end sewing machines
US3143987A (en) * 1961-10-26 1964-08-11 Union Special Maschinenfab Thread chain severing device for sewing machines
US3557730A (en) * 1964-06-22 1971-01-26 Merrow Machine Co Thread-cutting mechanism for sewing machine
US3356054A (en) * 1965-04-20 1967-12-05 L & L Mfg Inc Apparatus for back tacking loose ends of sewing machine stitching, and the like
JPS4324308Y1 (en) * 1965-07-22 1968-10-14
US3511202A (en) * 1968-02-28 1970-05-12 Ira Strauss Thread chain severing device for sewing machines
US3494315A (en) * 1968-09-17 1970-02-10 Merrow Machine Co Thread cutting mechanism for sewing machines
CH507409A (en) * 1969-04-02 1971-05-15 Schips Helmut Device on sewing machines for cutting the thread chain
DE1945310C3 (en) * 1969-09-06 1975-07-17 Liersch, Arthur, 2000 Hamburg Device for cutting the thread chain on sewing machines
GB1361858A (en) * 1971-06-27 1974-07-30 Singer Co Thread-cutting mechanism for sewing machines
CH564629A5 (en) * 1973-05-07 1975-07-31 Schips Helmut
IT1010261B (en) * 1974-04-30 1977-01-10 Virginio Rimoldi E C Spa CHAIN CUTTER DEVICE FOR SEWING MACHINES
IT1042452B (en) * 1975-09-11 1980-01-30 Rockwell Rimoldi Spa PNEUMATIC DEVICE FOR MERE TRACKS THE CHAIN OF STITCHES AT THE BEGINNING OF THE SEWING
IT1085309B (en) * 1977-02-02 1985-05-28 Rockwell Rimoldi Spa DEVICE TO ORIENT AND HOLD THE CHAIN OF STITCHES AT THE BEGINNING OF A SEWING
CH619996A5 (en) * 1977-02-02 1980-10-31 Rockwell Rimoldi Spa Device for orientating and retaining the chain of stitches at the start of a seam in a sewing machine
DE2835994C2 (en) * 1977-09-22 1983-12-08 Rockwell-Rimoldi S.p.A., Olcella, Milano Overlock sewing machine
DE3047121A1 (en) * 1980-12-13 1982-07-29 Heinz 7022 Leinfelden-Echterdingen Hoss Workpiece feed mechanism for industrial sewing machine - with additional extended feed dogs to facilitate automatic thread trimming
US4644884A (en) * 1983-07-28 1987-02-24 Pegasus Sewing Maching Mfg. Co., Ltd. Thread chain sewing apparatus for use in overedge sewing machine
DE3522462A1 (en) * 1985-06-22 1987-01-02 Kochs Adler Ag THREAD SEPARATOR, ESPECIALLY FOR THE THREAD CHAINS OF DOUBLE CHAIN STITCH SEWING MACHINES

Also Published As

Publication number Publication date
DE3816782A1 (en) 1989-11-30
EP0342555A1 (en) 1989-11-23
JP2698427B2 (en) 1998-01-19
DE58908895D1 (en) 1995-03-02
JPH0249689A (en) 1990-02-20
ATE117384T1 (en) 1995-02-15
US5027733A (en) 1991-07-02

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