EP0351596A2 - Closing method for a work piece holder - Google Patents

Closing method for a work piece holder Download PDF

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Publication number
EP0351596A2
EP0351596A2 EP89111656A EP89111656A EP0351596A2 EP 0351596 A2 EP0351596 A2 EP 0351596A2 EP 89111656 A EP89111656 A EP 89111656A EP 89111656 A EP89111656 A EP 89111656A EP 0351596 A2 EP0351596 A2 EP 0351596A2
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EP
European Patent Office
Prior art keywords
sewing material
frame
material holder
closing
plate
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
EP89111656A
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German (de)
French (fr)
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EP0351596B1 (en
EP0351596A3 (en
Inventor
Uwe Beermann
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.)
Duerkopp Adler AG
Original Assignee
Kochs Adler AG
Duerkopp Adler AG
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Publication of EP0351596A2 publication Critical patent/EP0351596A2/en
Publication of EP0351596A3 publication Critical patent/EP0351596A3/en
Application granted granted Critical
Publication of EP0351596B1 publication Critical patent/EP0351596B1/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
    • D05B39/00—Workpiece carriers

Definitions

  • the invention relates to a method for closing a sewing material holder and a sewing material holder for an automatic sewing machine, by means of which the closing method can be used.
  • Sewing material holder itself has been known for a long time and is disclosed, for example, in DE-PS 35 46 238.
  • the workpieces to be sewn together are placed in the sewing material holder, fixed in position by clamping and then sewn together.
  • the known sewing material holders usually consist of a thin bottom plate and top plate that can be folded like a lid. After closing the sewing material holder, the sewing material parts to be sewn together are clamped between the two plates. Recesses are made in both the top plate and the bottom plate, which correspond to the seam course to be produced.
  • Sewing material holders are conceivable in which the top plate cannot be swung onto the bottom plate, but can be lowered in a straight line.
  • these would have the disadvantage that the lower plate would no longer be properly visible to the operator or would no longer be easily accessible due to the necessary guide rods, which would make placing and aligning the sewing material parts significantly more difficult.
  • the invention is therefore based on the object of specifying a method for closing a sewing material holder, with which it is ensured that the once aligned sewing material parts are not displaced during clamping and to provide a sewing material holder with which this method can be implemented.
  • Fig. 1 shows an automatic sewing machine in perspective, on which one or two sewing material holders according to the invention can be used.
  • Such an automatic sewing machine is described in detail in DE-PS 35 46 238 and US Pat. No. 4,696,242 in its structure and mode of operation, so that these documents are made the subject of the disclosure content of the following description.
  • a recess 10 is provided in the worktop 1, in which at least one sewing material holder 2 can be accommodated.
  • the material holder 2 is formed from a lower plate 3 and an upper plate 4.
  • the lower plate 3 of the material holder 2 is immovably mounted in the recess 10, while the upper plate 4 is fastened to the worktop 1 via joints 11 and 11a and in Direction of the lower plate 3 is pivotable.
  • the design of the lower plate 3 according to the device is known from the above publications and is therefore not to be explained in more detail.
  • the upper plate 4 of the workpiece holder 2 outlined in FIGS. 2 and 3 consists of the frame 5 and the Pressure plate 6.
  • the pressure plate 6 is connected to the frame 5 via four lifting cylinders 7, 7a, 7b, 7c, which can be operated pneumatically, for example.
  • the lifting cylinders 7 to 7c are fastened to the frame 5 and their piston rods 8 are guided through bores provided therein and anchored to the pressure plate 6 via connecting pieces 9.
  • the lifting cylinders 7 to 7c are preferably double-acting cylinders, in which the piston rod 8 extends or retracts depending on the direction of the pressurization. As illustrated in FIG. 4, the pressure plate 6 can be raised or lowered from the frame 5 via the lifting cylinders 7 to 7c.
  • the pressure plate 6 is arranged below the frame 5.
  • 6 centering pins 12 are attached to the pressure plate, which engage in corresponding centering holes 13 in the frame 5.
  • Hinges 11, 11a are arranged on the side of the frame 5 opposite the pressure plate 6, which is formed by four angle profiles.
  • the L-shaped angle profiles form the frame 5 such that its side facing the pressure plate 6 is flat.
  • the hinges 11, 11a are formed by three levers 15, 16, 17.
  • the lever 15 is fixed to the frame 5.
  • the lever 16 is connected to the lever 15 via the joint 18 and screwed to the lever 17 at the point 19.
  • the lever 17 is fixed on the worktop 1 by means of screws 14.
  • the levers 15, 16, 17 are each symmetrical in this way trained that cylinders 20 can be articulated between them; that is, the lever arrangement shown in one dimension in FIG. 4 is again present on the other side of the cylinder 20 — not visible here (see FIG. 2).
  • the hinges 11, 11a are controlled via cylinders 20 which can be actuated by external power. These cylinders 20 are preferably also pneumatic lifting cylinders. Each cylinder 20 is articulated with its housing 21, for example via an eye 23, on the lever 17 and with its piston rod 22 on the lever 15.
  • Fig. 3 shows schematically the arrangement of the hinge 11 on the frame 5.
  • the piston rod 22 of the cylinder 20 is fully extended, the upper plate 4 is consequently shown in its lowered position.
  • the upper plate 4 pivots around the hinge point 18 in the direction of the arrow S, so that the upper plate 4 is pivoted away from the lower plate 3 .
  • the cylinders 7a to 7c are retracted so that the pressure plate 6 is as close as possible to the frame 5.
  • the hinges 11, 11a are designed in such a way that a pivoting movement of at least 45 ° is possible, the operator can view the lower plate 3 of the material holder 2 unhindered and align the material parts when the upper plate 4 is completely in its position swiveled away position.
  • the cylinders 20 are actuated so that the piston rod 22 extends and the upper plate 4 is pivoted so far in the direction of the lower plate 3 until the pressure plate 6 is in a plane parallel to this.
  • the lifting cylinders 7-7c are then activated, ie extended.
  • the pressure plate 6 is lowered vertically relative to the frame (or more importantly, relative to the lower plate 3) (arrow A), namely until the sewing material parts are clamped between the plates 6, 3.
  • the automatic sewing machine is computer-controlled.
  • the person skilled in the art will readily be able to have the control of the closing process also carried out by the computer, so that a completely automated process occurs after the sewing material has been aligned. Due to the fact that the pressure plate 6 comes to rest on the lower plate 3 in a straight line movement, the sewing material parts are immediately clamped over a large area, so that slipping during clamping is reliably ruled out.
  • such sewing material holders can also be designed such that a plurality of sewing material parts lying one on top of the other are positioned and clamped in relation to one another and overall.
  • the material holder can also have further plates arranged on the hinges 11, 11a between the lower and the upper plate 3, 4.

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

Abstract

There is presented a method for closing a workpiece holder for an automatic sewing machine, which ensures that the workpiece parts, once aligned, are no longer displaced during the clamping, and a workpiece holder by means of which this process can be carried out is provided. The closing of the workpiece holder is brought about by the fact that the closing movement results from a combined pivoting and lowering movement. The top plate of the workpiece holder is thereby lowered over a large surface on to the aligned workpiece resting on the bottom plate of the workpiece holder, so that a uniform clamping takes place immediately. <??>Advantageously, the workpiece holder is designed so that the closing of the workpiece holder can be executed automatically, thus additionally achieving a reduction in the run-through times. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren zum Schliessen eines Nähguthalters und einen Nähguthalter für einen Nähautomaten, mittels dessen das Schliessverfahren angewandt werden kann.The invention relates to a method for closing a sewing material holder and a sewing material holder for an automatic sewing machine, by means of which the closing method can be used.

Nähguthalter an sich seit langem bekannt und beispielsweise in der DE-PS 35 46 238 offenbart.Sewing material holder itself has been known for a long time and is disclosed, for example, in DE-PS 35 46 238.

In den Nähguthalter werden die miteinander zu vernähenden Werkstücke eingelegt, durch Klemmen in ihrer Lage fixiert und anschliessend miteinander vernäht.The workpieces to be sewn together are placed in the sewing material holder, fixed in position by clamping and then sewn together.

Die bekannten Nähguthalter bestehen üblicherweise aus einer dünnen Unterplatte und hierzu nach Art eines Deckels klappbaren Oberplatte. Nach Schliessen des Nähguthalters werden die miteinander zu vernähenden Nähgutteile zwischen beiden Platten klemmend gehalten. Sowohl in der Oberplatte als auch in der Unterplatte sind Ausnehmungen angebracht, die dem zu erzeugenden Nahtverlauf entsprechen.The known sewing material holders usually consist of a thin bottom plate and top plate that can be folded like a lid. After closing the sewing material holder, the sewing material parts to be sewn together are clamped between the two plates. Recesses are made in both the top plate and the bottom plate, which correspond to the seam course to be produced.

Insbesondere bei der Bearbeitung grösserer Nähgutteile und den entsprechend dimensionierten Nähguthaltern tritt beim Klemmen eine Relativverschiebung der zuvor sorgfältig ausgerichteten Einzelteile auf, weil beim Abschwenken der Oberplatte auf die Unterplatte die Nähgutteile nicht sofort großflächig geklemmt werden, sondern von einer Linienbelastung am hinteren Ende des Nähguthalters ausgehend die geklemmte Fläche zunehmend vergrössert wird, bis der Nähguthalter vollständig geschlossen ist.
Da dadurch im Hinblick auf das vorherige Ausrichten ein exaktes Vernähen nicht möglich ist, können diese Nähguthalter keine Verwendung finden, wenn es beispielsweise beim Nähen von Airbags erhöht darauf ankommt, dass die spätere Nahtbildung an einer zuvor genau definierten Stelle erfolgt.
Die gleiche Problematik tritt auf bei Werkstücken, die mit sehr nachgiebigem Material, wie beispielsweise Schaumstoffen, vernäht werden sollen. Durch die hohe Flexibilität des Schaumstoffes wird dieser beim Klemmen gequetscht und zu einem Wulst zusammengeschoben.In particular when processing larger sewing material parts and the appropriately dimensioned sewing material holders, a relative displacement of the previously carefully aligned individual parts occurs when clamping, because when the upper plate is swiveled onto the lower plate, the sewing material parts are not immediately clamped over a large area, but from a line load at the rear end starting from the material holder, the clamped area is increasingly enlarged until the material holder is completely closed.
Since precise sewing is not possible with regard to the previous alignment, these sewing material holders cannot be used if, for example, when sewing airbags, it is more important that the later seam formation takes place at a previously precisely defined location.
The same problem occurs with workpieces that are to be sewn with very flexible material, such as foams. Due to the high flexibility of the foam, it is squeezed when clamped and pushed together to form a bead.

Es sind Nähguthalter vorstellbar, bei denen die Oberplatte nicht auf die Unterplatte draufgeschwenkt, sondern geradlinig abgesenkt werden kann. Diese hätten aber den Nachteil, dass die Unterplatte für die Bedienperson nicht mehr richtig einsehbar bzw. durch die notwendigen Führungsstangen nicht mehr gut zugänglich würde und dadurch das Auflegen und Ausrichten der Nähgutteile bedeutend erschwert würde.Sewing material holders are conceivable in which the top plate cannot be swung onto the bottom plate, but can be lowered in a straight line. However, these would have the disadvantage that the lower plate would no longer be properly visible to the operator or would no longer be easily accessible due to the necessary guide rods, which would make placing and aligning the sewing material parts significantly more difficult.

Die Erfindung liegt daher die Aufgabe zugrunde, ein Verfahren zum Schliessen eines Nähguthalters anzugeben, mit dem sichergestellt wird, dass die einmal ausgerichteten Nähgutteile beim Klemmen nicht verschoben werden und einen Nähguthalter zur Verfügung zu stellen, mit dem dieses Verfahren realisierbar ist.The invention is therefore based on the object of specifying a method for closing a sewing material holder, with which it is ensured that the once aligned sewing material parts are not displaced during clamping and to provide a sewing material holder with which this method can be implemented.

Diese Aufgabe wird erfindungsgemäss durch die Merkmale im Kennzeichnungsteil des Anspruchs 1 gelöst. Durch die erfindungsgemässen Verfahrensschritte wird sichergestellt, dass die Oberplatte des Nähguthalters sich beim Klemmen sofort mit ihrer vollständigen Fläche auf die Unterplatte auflegt und die ausgerichteten Nähgutteile klemmt, so dass diese ihre einmal eingenommene Lage nicht mehr verändern können. Mit einer Ausbildung des Nähguthalters nach Anspruch 2 kann das Verfahren ausgeführt werden. Dabei ist gewährleistet, dass, solange die Oberplatte weggeschwenkt ist, die Unterplatte durch die Bedienperson frei einsehbar und zugänglich ist. Da die Schliess- und Klemmkraft durch die Hubzylinder auf die Werkstücke aufgebracht wird, entfällt das bisher notwendige mechanische Verschliessen des Nähguthalters durch die Bedienperson. Dadurch werden die Durchlaufzeiten verkürzt, insbesondere dann, wenn in einem Nähautomaten zwei Nähguthalter nebeneinander zum Einsatz kommen und abwechselnd automatisch das Vernähen erfolgt. In diesem Fall kann nach dem manuellen Ausrichten der Nähgutteile durch die Bedienperson der weitere Ablauf automatisiert erfolgen und sich die Bedienperson dem zweiten Nähguthalter zuwenden.This object is achieved according to the invention by the features in the characterizing part of claim 1. Through the method steps according to the invention ensures that the upper plate of the material holder immediately lies on the lower plate with its complete surface and clamps the aligned material parts so that they cannot change their position once they have been taken. With an embodiment of the material holder according to claim 2, the method can be carried out. This ensures that as long as the top plate is pivoted away, the bottom plate is freely visible and accessible by the operator. Since the closing and clamping force is applied to the workpieces by the lifting cylinder, the operator does not have to mechanically close the material holder so far. This shortens the throughput times, especially when two sewing material holders are used side by side in an automatic sewing machine and the sewing takes place automatically and alternately. In this case, after the manual alignment of the sewing material parts by the operator, the further process can take place automatically and the operator can turn to the second workpiece holder.

Weitere vorteilhafte Ausgestaltungen sind den Unteransprüchen entnehmbar.Further advantageous refinements can be found in the subclaims.

Anhand einer Zeichnung soll die Erfindung näher beschrieben werden. Es zeigt:

  • Fig. 1 einen Nähautomaten in perspektivischer Darstellung,
  • Fig. 2 die Draufsicht auf einen Nähguthalter in vereinfachter Darstellung,
  • Fig. 3 den Schnitt durch den Nähguthalter nach Fig. 2 entlang der Linie A - A,
  • Fig. 4 einen Schnitt durch den Nähguthalter nach Fig. 2 entlang der Linie B - B,
  • Fig. 5 die skizzierte Darstellung des Bewegungsablaufes beim Schliessen des Nähguthalters.
The invention will be described in more detail with reference to a drawing. It shows:
  • 1 is a perspective view of an automatic sewing machine,
  • 2 is a top view of a material holder in a simplified representation,
  • 3 shows the section through the material holder according to FIG. 2 along the line A - A,
  • 4 shows a section through the sewing material holder according to FIG. 2 along the line BB;
  • Fig. 5 shows the sketch of the sequence of movements when closing the material holder.

Fig. 1 zeigt einen Nähautomaten in pespektivischer Darstellung, an dem ein bzw. zwei Nähguthalter nach der Erfindung verwendet werden können. Ein solcher Nähautomat ist in der DE-PS 35 46 238 bzw. der US-PS 4 696 242 in seinem Aufbau und seiner Funktionsweise ausführlich beschrieben, so dass diese Schriften zum Gegenstand des Offenbarungsinhalts nachfolgender Beschreibung gemacht werden.Fig. 1 shows an automatic sewing machine in perspective, on which one or two sewing material holders according to the invention can be used. Such an automatic sewing machine is described in detail in DE-PS 35 46 238 and US Pat. No. 4,696,242 in its structure and mode of operation, so that these documents are made the subject of the disclosure content of the following description.

In der Arbeitsplatte 1 ist eine Ausnehmung 10 vorgesehen, in der mindestens ein Nähguthalter 2 Platz findet. Der Nähguthalter 2 wird gebildet aus einer unteren Platte 3 und einer oberen Platte 4. Die untere Platte 3 des Nähguthalters 2 ist dabei unverschiebbar in der Ausnehmung 10 gelagert, während die obere Platte 4 über Gelenke 11 bzw. 11a an der Arbeitsplatte 1 befestigt und in Richtung der unteren Platte 3 schwenkbar ist. Die vorrichtungsgemässe Ausgestaltung der unteren Platte 3 ist aus den obigen Druckschriften bekannt und soll daher nicht näher erläutert werden.A recess 10 is provided in the worktop 1, in which at least one sewing material holder 2 can be accommodated. The material holder 2 is formed from a lower plate 3 and an upper plate 4. The lower plate 3 of the material holder 2 is immovably mounted in the recess 10, while the upper plate 4 is fastened to the worktop 1 via joints 11 and 11a and in Direction of the lower plate 3 is pivotable. The design of the lower plate 3 according to the device is known from the above publications and is therefore not to be explained in more detail.

Die in Fig. 2 und 3 skizzierte obere Platte 4 des Nähguthalters 2 besteht aus dem Rahmen 5 und der Druckplatte 6. Die Druckplatte 6 ist über vier Hubzylinder 7, 7a, 7b, 7c, die beispielsweise pneumatisch betreibbar sind, mit dem Rahmen 5 verbunden. Die Hubzylinder 7 bis 7c sind auf dem Rahmen 5 befestigt und ihre Kolbenstangen 8 durch hierin vorgesehene Bohrungen geführt und über Verbindungsstücke 9 auf der Druckplatte 6 verankert. Bei den Hubzylindern 7 bis 7c handelt es sich vorzugsweise um doppeltwirkende Zylinder, bei denen je nach Richtung der Druckbeaufschlagung die Kolbenstange 8 ein- oder ausfährt. Wie Fig. 4 verdeutlicht, kann die Druckplatte 6 über die Hubzylinder 7 bis 7c an den Rahmen 5 angehoben bzw. von diesem aus abgesenkt werden. In Bezug auf die Arbeitsplatte 1 des Nähautomaten ist die Druckplatte 6 unterhalb des Rahmens 5 angeordnet. Um beim Anheben bzw. Absenken eine einwandfreie Führung zu gewährleisten, d.h., nur eine (relativ zum Rahmen) senkrechte Bewegungsrichtung zuzulassen, sind an der Druckplatte 6 Zentrierstifte 12 befestigt, die in entsprechende Zentrierbohrungen 13 im Rahmen 5 eingreifen.The upper plate 4 of the workpiece holder 2 outlined in FIGS. 2 and 3 consists of the frame 5 and the Pressure plate 6. The pressure plate 6 is connected to the frame 5 via four lifting cylinders 7, 7a, 7b, 7c, which can be operated pneumatically, for example. The lifting cylinders 7 to 7c are fastened to the frame 5 and their piston rods 8 are guided through bores provided therein and anchored to the pressure plate 6 via connecting pieces 9. The lifting cylinders 7 to 7c are preferably double-acting cylinders, in which the piston rod 8 extends or retracts depending on the direction of the pressurization. As illustrated in FIG. 4, the pressure plate 6 can be raised or lowered from the frame 5 via the lifting cylinders 7 to 7c. With respect to the worktop 1 of the automatic sewing machine, the pressure plate 6 is arranged below the frame 5. In order to ensure proper guidance when lifting or lowering, ie to allow only one direction of movement (relative to the frame), 6 centering pins 12 are attached to the pressure plate, which engage in corresponding centering holes 13 in the frame 5.

Auf der der Druckplatte 6 entgegengesetzten Seite des Rahmens 5, der durch vier Winkelprofile gebildet wird, sind Scharniere 11, 11a angeordnet. Die L-förmigen Winkelprofile bilden den Rahmen 5 derart, dass dessen der Druckplatte 6 zugewandte Seite eben ist. Die Scharniere 11, 11a werden gebildet durch drei Hebel 15, 16, 17. Der Hebel 15 ist fest mit dem Rahmen 5 verbunden. Über das Gelenk 18 ist der Hebel 16 mit dem Hebel 15 verbunden, und an der Stelle 19 mit dem Hebel 17 verschraubt. Der Hebel 17 ist mittels Schrauben 14 fest auf der Arbeitsplatte 1 angeordnet. Bei einer bevorzugten Ausführungsform der Scharniere 11 sind die Hebel 15, 16, 17 jeweils symmetrisch so ausgebildet, dass Zylinder 20 zwischen ihnen angelenkt werden können; d.h., die in der Fig. 4 eindimensional dargestellte Hebelanordnung ist auf der anderen Seite des Zylinders 20 - hier nicht sichtbar -nochmals vorhanden (vgl. Fig. 2). Die Scharniere 11, 11a werden über fremdkraftbetätigbare Zylinder 20 gesteuert. Bei diesen Zylindern 20 handelt es sich vorzugsweise ebenfalls um Pneumatik-Hubzylinder. Jeder Zylinder 20 ist mit seinem Gehäuse 21 beispielsweise über ein Auge 23 am Hebel 17 und mit seiner Kolbenstange 22 am Hebel 15 angelenkt.Hinges 11, 11a are arranged on the side of the frame 5 opposite the pressure plate 6, which is formed by four angle profiles. The L-shaped angle profiles form the frame 5 such that its side facing the pressure plate 6 is flat. The hinges 11, 11a are formed by three levers 15, 16, 17. The lever 15 is fixed to the frame 5. The lever 16 is connected to the lever 15 via the joint 18 and screwed to the lever 17 at the point 19. The lever 17 is fixed on the worktop 1 by means of screws 14. In a preferred embodiment of the hinges 11, the levers 15, 16, 17 are each symmetrical in this way trained that cylinders 20 can be articulated between them; that is, the lever arrangement shown in one dimension in FIG. 4 is again present on the other side of the cylinder 20 — not visible here (see FIG. 2). The hinges 11, 11a are controlled via cylinders 20 which can be actuated by external power. These cylinders 20 are preferably also pneumatic lifting cylinders. Each cylinder 20 is articulated with its housing 21, for example via an eye 23, on the lever 17 and with its piston rod 22 on the lever 15.

Fig. 3 zeigt schematisch die Anordnung des Scharniers 11 auf dem Rahmen 5. In dieser dargestellten Lage ist die Kolbenstange 22 des Zylinders 20 vollständig ausgefahren, die Oberplatte 4 folglich in ihrer abgesenkten Position gezeigt. Aus dieser Skizze wird deutlich, dass, wenn die Kolbenstange 22 des Pneumatik-­Zylinders 20 eingefahren wird, die obere Platte 4 um den Gelenkpunkt 18 eine Schwenkbewegung in Richtung des Pfeiles S ausführt, so dass die obere Platte 4 von der unteren Platte 3 weggeschwenkt wird. Dabei sind die Zylinder 7a bis 7c eingefahren, so dass sich die Druckplatte 6 möglichst nahe am Rahmen 5 befindet. Unter der Voraussetzung, dass die Scharniere 11, 11a so ausgestaltet sind, dass eine Schwenkbewegung von mindestens 45° möglich ist, kann die Bedienperson die untere Platte 3 des Nähguthalters 2 ungehindert einsehen und die Nähgutteile darauf ausrichten, wenn die Oberplatte 4 sich in ihrer vollständig weggeschwenkten Position befindet. Nach dem Ausrichten werden die Zylinder 20 so angesteuert, dass die Kolbenstange 22 ausfährt und die obere Platte 4 so weit in Richtung der unteren Platte 3 geschwenkt wird, bis sich die Druckplatte 6 in einer zu dieser parallelen Ebene befindet. Daran anschliessend werden die Hubzylinder 7-7c aktiviert, d.h. ausgefahren. Dabei wird die Druckplatte 6 relativ zum Rahmen (bzw. wichtiger: relativ zur unteren Platte 3 ) senkrecht abgesenkt (Pfeil A), und zwar so weit, bis die Nähgutteile zwischen den Platten 6, 3 eingeklemmt sind. Wie in der DE-PS 35 46 238 beschrieben, ist der Nähautomat rechnergesteuert. Der Fachmann wird ohne weiteres in der Lage sein, die Steuerung des Schliessvorgangs ebenfalls durch den Rechner erfolgen zu lassen, so dass sich nach dem Ausrichten des Nähgutes ein völlig automatisierter Ablauf einstellt. Dadurch, dass die Druckplatte 6 in einer geradlinig geführten Bewegung auf der unteren Platte 3 zur Auflage kommt, werden dei Nähgutteile sofort großflächig geklemmt, so dass ein Verrutschen während des Klemmens sicher ausgeschlossen ist.Fig. 3 shows schematically the arrangement of the hinge 11 on the frame 5. In this position, the piston rod 22 of the cylinder 20 is fully extended, the upper plate 4 is consequently shown in its lowered position. It is clear from this sketch that when the piston rod 22 of the pneumatic cylinder 20 is retracted, the upper plate 4 pivots around the hinge point 18 in the direction of the arrow S, so that the upper plate 4 is pivoted away from the lower plate 3 . The cylinders 7a to 7c are retracted so that the pressure plate 6 is as close as possible to the frame 5. Provided that the hinges 11, 11a are designed in such a way that a pivoting movement of at least 45 ° is possible, the operator can view the lower plate 3 of the material holder 2 unhindered and align the material parts when the upper plate 4 is completely in its position swiveled away position. After alignment, the cylinders 20 are actuated so that the piston rod 22 extends and the upper plate 4 is pivoted so far in the direction of the lower plate 3 until the pressure plate 6 is in a plane parallel to this. The lifting cylinders 7-7c are then activated, ie extended. The pressure plate 6 is lowered vertically relative to the frame (or more importantly, relative to the lower plate 3) (arrow A), namely until the sewing material parts are clamped between the plates 6, 3. As described in DE-PS 35 46 238, the automatic sewing machine is computer-controlled. The person skilled in the art will readily be able to have the control of the closing process also carried out by the computer, so that a completely automated process occurs after the sewing material has been aligned. Due to the fact that the pressure plate 6 comes to rest on the lower plate 3 in a straight line movement, the sewing material parts are immediately clamped over a large area, so that slipping during clamping is reliably ruled out.

Dem Fachmann ist bekannt, dass die Pneumatik-Zylinder 7, 7a, 7b, 7c gleichzeitig angesteuert werden müssen, um ein geradliniges Absenken der Druckplatte 6 zu ermöglichen. Dazu ist es notwendig, dass die Steuerleitungen zu den Pneumatik-Zylindern 7 bis 7c jeweils die gleiche Länge haben, um ein simultanes Ansprechen zu gewährleisten.It is known to the person skilled in the art that the pneumatic cylinders 7, 7a, 7b, 7c must be activated at the same time in order to enable the pressure plate 6 to be lowered in a straight line. For this it is necessary that the control lines to the pneumatic cylinders 7 to 7c each have the same length in order to ensure a simultaneous response.

In Fig. 5 ist der aus einer bogenförmigen Schwenk- und einer geradlinigen Absenkbewegung resultierende Bewegungsablauf bei dem zuvor beschriebenen Schliessen des Nähguthalters 2 dargestellt.5 shows the sequence of movements resulting from an arc-shaped swiveling and a rectilinear lowering movement when the material holder 2 is closed as described above.

Es is deutlich ersichtlich, dass der Rahmen 5 der Oberplatte 4 in der ersten Phase eine reine Schwenk­ bewegung ausführt, während sich die Druckplatte relativ zu diesem nicht bewegt und in der zweiten Phase, die letztendlich zum Klemmen der Nähgutteile führt, der Rahmen 5 stillsteht und sich die Druckplatte 6 relativ dazu in einer geradlinigen Bahn (senkrecht zur Unterplatte 3) absenkt.It is clearly evident that the frame 5 of the top plate 4 in the first phase is a pure swivel performs movement while the pressure plate does not move relative to this and in the second phase, which ultimately leads to the clamping of the sewing material parts, the frame 5 stands still and the pressure plate 6 lowers relative to it in a straight path (perpendicular to the lower plate 3).

Im allgemeinen können solche Nähguthalter auch derart ausgebildet sein, dass mehrere aufeinanderliegende Nähgutteile zueinander und insgesamt positioniert und geklemmt werden. In einem solchen Fall kann der Nähguthalter auch noch weitere, an den Scharnieren 11, 11a zwischen der unteren und der oberen Platte 3, 4 angeordnete Platten aufweisen.In general, such sewing material holders can also be designed such that a plurality of sewing material parts lying one on top of the other are positioned and clamped in relation to one another and overall. In such a case, the material holder can also have further plates arranged on the hinges 11, 11a between the lower and the upper plate 3, 4.

Claims (8)

1. Verfahren zum Schliessen eines aus mindestens zwei, zueinander schwenkbar angeordneten Platten bestehenden Nähguthalters, wobei ein oder mehrere zu nähende Nähgutteile zuvor auf einer unteren Platten aufgelegt, ausgerichtet und anschliessend durch Schliessen mittels einer oberen Platte in der ausgerichteten Lage geklemmt werden, dadurch gekennzeichnet, dass die obere Platte (4) soweit in Richtung auf die untere Platte (3) geschwenkt wird, bis sie sich über dieser in einer dazu parallelen Ebene befindet und daran anschliessend in bezug auf die untere Platte (3) geradlinig auf diese soweit abgesenkt wird, bis die auf der unteren Platte (3) ausgerichteten Nähgutteile zwischen beiden Platten eingeklemmt sind.1. A method for closing a sewing material holder consisting of at least two plates which can be pivoted relative to one another, one or more sewing material parts to be sewn previously placed on a lower plate, aligned and then clamped in the aligned position by closing by means of an upper plate, characterized in that that the upper plate (4) is pivoted in the direction of the lower plate (3) until it is above it in a plane parallel to it and then is lowered in a straight line with respect to the lower plate (3), until the sewing material parts aligned on the lower plate (3) are clamped between the two plates. 2. Nähguthalter zur Ausführung des Verfahrens nach Anspruch 1, wobei der Nähguthalter gebildet wird durch mindestens zwei Platten, die zueinander schwenkbar angeordnet sind, dadurch gekennzeichnet, dass die obere Platte (4) gebildet wird durch einen schwenkbaren Rahmen (5) und einer relativ zum Rahmen (5) geradlinig auf- bzw. absenkbaren Druckplatte (6).2. sewing material holder for carrying out the method according to claim 1, wherein the sewing material holder is formed by at least two plates which are arranged pivotably to one another, characterized in that the upper plate (4) is formed by a pivotable frame (5) and one relative to Frame (5) pressure plate (6) can be raised or lowered in a straight line. 3. Nähguthalter nach Anspruch 2, dadurch gekennzeichnet, dass die Druckplatte (6) über Hubzylinder (7, 7a, 7b, 7c) unterhalb des Rahmens (5) angelenkt ist.3. Sewing material holder according to claim 2, characterized in that the pressure plate (6) is articulated via the lifting cylinder (7, 7a, 7b, 7c) below the frame (5). 4. Nähguthalter nach Anspruch 3, dadurch gekennzeichnet, dass die Hubzylinder (7,7a,7b,7c) auf der der Druckplatte (6) abgewandten Seite des Rahmens (5) befestigt sind und die Druckplatte (6) im Rahmen (5) durch Zentrierstifte (12) geführt ist.4. Sewing material holder according to claim 3, characterized in that the lifting cylinders (7, 7a, 7b, 7c) are fastened on the side of the frame (5) facing away from the pressure plate (6) and the pressure plate (6) in the frame (5) Centering pins (12) is guided. 5. Nähguthalter nach Anspruch 1, dadurch gekennzeichnet, dass die Hubzylinder (7,7a,7b, 7c) synchron ansteuerbar sind.5. Sewing material holder according to claim 1, characterized in that the lifting cylinders (7, 7a, 7b, 7c) can be controlled synchronously. 6. Nähguthalter nach Anspruch 1, dadurch gekennzeichnet, dass der Rahmen über Scharniere (11, 11a) an der Arbeitsplatte (1) des Nähautomaten befestigt ist.6. Sewing material holder according to claim 1, characterized in that the frame is attached to the worktop (1) of the automatic sewing machine via hinges (11, 11a). 7. Nähguthalter nach Anspruch 5, dadurch gekennzeichnet, dass die Scharniere (11, 11a) gebildet werden durch mindestens zwei gelenkig miteinander verbundene Hebel (15, 17), wobei ein Hebel (15) fest am Rahmen (5) und ein Hebel (17) an der Arbeitsplatte (1) angeordnet ist.7. Material holder according to claim 5, characterized in that the hinges (11, 11a) are formed by at least two articulated levers (15, 17), a lever (15) fixed to the frame (5) and a lever (17th ) is arranged on the worktop (1). 8. Nähguthalter nach Anspruch 6, dadurch gekennzeichnet, dass zwischen den Hebeln (15, 17) ein fremdbetätigter Hubzylinder(20) so angeordnet ist, dass mittels einer Veränderung des Kolbenhubs eine Schwenkbewegung des Rahmens erzielbar ist.8. Sewing material holder according to claim 6, characterized in that between the levers (15, 17) an externally operated lifting cylinder (20) is arranged so that a pivoting movement of the frame can be achieved by changing the piston stroke.
EP89111656A 1988-07-19 1989-06-27 Closing method for a work piece holder Expired - Lifetime EP0351596B1 (en)

Applications Claiming Priority (2)

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DE3824452A DE3824452C1 (en) 1988-07-19 1988-07-19
DE3824452 1988-07-19

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EP0351596A3 EP0351596A3 (en) 1991-01-16
EP0351596B1 EP0351596B1 (en) 1993-09-01

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EP (1) EP0351596B1 (en)
JP (1) JP2929295B2 (en)
DE (2) DE3824452C1 (en)

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JP3128793B2 (en) * 1993-05-07 2001-01-29 ブラザー工業株式会社 Sewing work table
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US6679190B1 (en) 2001-06-01 2004-01-20 Nick L. French Fabric holder for embroidery frames
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EP0202064A1 (en) * 1985-05-06 1986-11-20 British United Shoe Machinery Limited Workpiece holding device

Also Published As

Publication number Publication date
EP0351596B1 (en) 1993-09-01
EP0351596A3 (en) 1991-01-16
JPH0265898A (en) 1990-03-06
JP2929295B2 (en) 1999-08-03
DE58905441D1 (en) 1993-10-07
DE3824452C1 (en) 1989-11-30
US5000103A (en) 1991-03-19

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