EP2503041A1 - Eyelet buttonhole sewing machine and method for sewing and eyelet buttonhole seam comprising a gimp thread - Google Patents

Eyelet buttonhole sewing machine and method for sewing and eyelet buttonhole seam comprising a gimp thread Download PDF

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Publication number
EP2503041A1
EP2503041A1 EP12157164A EP12157164A EP2503041A1 EP 2503041 A1 EP2503041 A1 EP 2503041A1 EP 12157164 A EP12157164 A EP 12157164A EP 12157164 A EP12157164 A EP 12157164A EP 2503041 A1 EP2503041 A1 EP 2503041A1
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EP
European Patent Office
Prior art keywords
gimp
thread
gimp thread
sewing
sewing machine
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Granted
Application number
EP12157164A
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German (de)
French (fr)
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EP2503041B1 (en
Inventor
Thomas Nöltge
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Duerkopp Adler AG
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Duerkopp Adler AG
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Publication of EP2503041A1 publication Critical patent/EP2503041A1/en
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
    • D05B3/06—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for sewing buttonholes
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Programme-controlled sewing machines
    • D05B19/02—Sewing machines having electronic memory or microprocessor control unit
    • D05B19/12—Sewing machines having electronic memory or microprocessor control unit characterised by control of operation of machine
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
    • D05B3/06—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for sewing buttonholes
    • D05B3/08—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for sewing buttonholes for buttonholes with eyelet ends

Definitions

  • the invention relates to an eyelet buttonhole sewing machine and a method of sewing a eyelet buttonhole seam having a gimp thread.
  • Such a sewing machine is known from the EP 1 722 021 B1 ,
  • the eyelet buttonhole sewing machine sews the eyelet buttonhole seam with three threads, namely a needle thread, a hook thread and a gimp thread.
  • the gimp thread serves to compliment the look of the eyelet buttonhole seam and thus the eye buttonhole.
  • a buttonhole sewing machine in which a gimp thread is fed via the actuation of an engaging lever prior to the beginning of an automatic sewing cycle.
  • a gimp thread supply device with a monitoring sensor and a control device leads to the possibility of reliably monitoring the inclusion of the gimp thread when sewing the eye buttonhole seam. If the eye buttonhole suture is undesirably sewn without the inclusion of the gimp thread, the controller may issue a signal and / or otherwise take countermeasures. If the monitor sensor detects that the gimp thread pull position is not reached, a corresponding fault signal may be passed to the controller. Unwanted production of the eye buttonhole without the gimp thread is avoided.
  • the eyelet buttonhole sewing machine may have a sewing mechanism that is pivotally configured to form the eyelet buttonhole seam.
  • the monitoring sensor may be configured such that a switching unit of the monitoring sensor only triggers when the gimp thread guide unit is in the neutral position at a certain pivot position of the sewing, which assumes the pivot position during the sewing of the eyelet buttonhole seam.
  • the monitoring sensor can be mounted on a pivotable sewing machine carrier together with the gimp thread guiding device in the "pivotable sewing machine" embodiment, so that triggering of a switching unit of the monitoring sensor is possible in any pivoting position of the sewing work.
  • a clamping lever embodiment of the gimp thread guiding unit according to claim 2 is inexpensive.
  • the clamping lever can clamp and guide the gimp thread at the same time.
  • the monitoring sensor can be used as an induction sensor, as a capacitive sensor or as an optical sensor, for. B. as a light barrier, be executed.
  • a thread cutting device leads to a reproducible thread cut after the formation of the eye buttonhole seam.
  • a guide unit according to claim 5 automatically returns to the neutral position as the home position upon completion of the eye buttonhole sewing program.
  • the guide unit is implemented as the gimp thread-clamping unit, the gimp thread is automatically withdrawn upon return of the guide unit to the neutral position, thus avoiding unwanted protrusion of the gimp thread at the seam beginning of the subsequently sewn eye buttonhole seam.
  • An adjustable stop according to claim 6 allows the specification of the position of the guide unit in the neutral position. This can be used for fine adjustment of the monitoring sensor and / or for specifying a retracted at the return of the then executed clamping unit guide unit in the neutral position gimp thread length.
  • the adjustable stop can be realized via a stop screw.
  • a clamping force setting unit allows a fine adjustment of the clamping force of the gimp thread clamping lever, so that when sewing the eyelet buttonhole entrained gimp thread on the one hand sufficiently large pulling force on the clamping lever to transfer this in the gimp thread pulling position exerts, on the other hand, but not too high tensile stress, which makes it difficult to take along the gimp thread.
  • the clamping force specification unit can be realized via an adjustable clamping spring. To adjust the clamping spring can serve a set screw.
  • an eye-buttonhole sewing machine C-shaped that is, it has an upper arm 1, a lower, cabinet-like base plate 2 and an interconnecting, approximately vertical stand 3 on.
  • an arm shaft 4 is mounted in a conventional manner, which is driven by a drive motor, not shown.
  • the arrangement of such a drive motor on such a sewing machine is off DE 102 25 511 C1 and DE 102 25 512 C1 known.
  • From the arm shaft 4, the drive of a vertically displaceable needle bar 5 with a needle 6 and a vibratory drive are derived for this purpose in a conventional manner.
  • the needle 6 guides a needle thread 7.
  • a Cartesian xyz coordinate system is used below.
  • the x-axis runs in the Fig. 1 perpendicular to the drawing plane and out of it.
  • the y-axis runs in the Fig. 1 to the right.
  • the z-axis runs in the Fig. 1 up.
  • an xy stage 8 is arranged, which is a cross slide movable in two horizontal coordinate directions, namely the x direction and the y direction.
  • the xy-table 8 is formed in a conventional manner, as for example from the DE 198 07 771 C1 (Corr. US 6,095,066 ) is known.
  • the drive of the xy-table 8 by means not shown drives, namely an x-drive and a y-drive, which are usually manner to positionable electric motors, so usually stepper motors, but also controllable DC motors, acts.
  • Such a configuration is from the DE 102 25 511 1 C1 and the DE 102 25 512 C1 known.
  • a two-part support plate 9 is arranged on the xy table 8. Each partial support plate 9 is associated with a Nähgutklammer 10. Such an arrangement is known from EP 1 722 021 B 1 known.
  • Sewing material clamps 10 each have a clamping plate 11. Sewing material 12 can be clamped between the clamping plates 11 and a support plate 13. In an opening of the support plate 13 is a throat plate 14 with a passage opening 15 (see. Fig. 2 ) arranged for a gimp thread 16.
  • the clamping plates 11 are attached to double-armed bearing levers 17. Details of the structure and the drive of the Nähgutklammern 10 result from the DE 102 16 808 C2 (corresponding US 6,722,299 B2 ), to which extent is referred.
  • a buttonhole cutting device 18 which has a lower, in the base plate 2 vertically, ie in the z-direction, stationarily arranged, not shown, knife unit and an upper cutting block 19. Details of the structure of the cutting device 18 will be apparent from the EP 1 722 021 B1 ,
  • the gimp thread 16 is fed to the stitch forming area by means of a gimp thread feeding device 23.
  • the gimp thread feeder 23 is in detail in the Fig. 2 and 3 shown.
  • the gimp thread feeder 23 has a gimp thread guide device 24 with a gimp thread guide unit 25 guiding the gimp thread 16.
  • the gimp thread guide unit 25 is formed as the gimp thread 16 clamping gimp thread clamp lever.
  • the gimp thread clamping lever 25 has a clamping plate 26.
  • the latter is designed as a spring which has a Adjusting screw 28 with specifiable force on the clamping plate 26 presses.
  • a free end of the clamping plate 26 is designed as a switching lug 29.
  • the latter is part of a monitoring sensor 30 for monitoring a position of the gimp thread guide unit 25, ie the clamping lever.
  • the gimp thread clamping lever 25 is a sewing component which can be displaced over the gimp thread 16 to be sewn.
  • the gimp thread clamping lever 25 is about a pivot joint 31 with a horizontal, parallel to the z-axis pivot axis relative to a housing-fixed bracket 32 between a in the Fig. 2 shown neutral position and one in the Fig. 3 pivoted gimp thread pulling position shown.
  • a position of the gimp thread clamping lever 25 in the neutral position can be predetermined via an adjustable stop 33.
  • the latter has a screwed through the bearing block 32 stop screw 34, the free end rests in the neutral position on a counter-stop boom 35 of the gimp thread clamping lever 25.
  • a position of the switching flag 29 are relatively adjusted relative to a switching unit 36 of the monitoring sensor 30.
  • the Monitoring sensor 30 is designed as a contactless sensor.
  • the monitoring sensor 30 may be designed as an induction sensor, as a capacitive sensor or as an optical sensor.
  • An example of an optical sensor is a light barrier.
  • the base plate 2 is a schematic in the Fig. 1 indicated thread cutting device 37 is housed, with the after the complete formation of the eye buttonhole seam 20 of the needle thread 7, the gimp thread 16 and the looper thread 22 are cut off.
  • the sewing machine further has a control device 38, which in the Fig. 1 and 2 is also shown schematically and is connected via signal line 39 to the switching unit 36 of the monitoring sensor 30 in signal connection.
  • the gimp thread 16 is fed to the stitch portion of a gimp thread supply, not shown in the drawing, via a feed sleeve 40. From there, the path of the gimp thread 16 is initially guided by a guide wire 41 and then via a housing-fixed guide opening 42. Following the guide opening 42, the gimp thread clamping lever 25 serves to guide the gimp thread 16. Following the guide through the gimp thread clamping lever 25, the gimp thread 16 first passes through a further guide opening 42 fixed to the housing, a further clamping unit 44 fixed to the housing and another, fixed to the housing Guide opening 45. Following this, the gimp thread 16 passes through the passage opening 15 of the throat plate 14.
  • the fabric 12 When sewing the eyelet buttonhole seam 20, the fabric 12 is positioned on the xy table 8 and held by the clamping plates 11, which are also referred to as brackets, during transport.
  • the eye buttonhole seam 20 is formed by performing a zig-zag seam using the needle thread 7 and the looper thread 22, a bead that surrounds the gimp thread 16 after exiting the throat plate 14, clamps, moves along and thereby continuously over the Gimp thread feeder 23 nachONE.
  • the pulling force exerted on the gimp thread 16 during the formation of the eyelet buttonhole seam 20 causes the gimp thread 26 to move the gimp thread clamping lever 25 from the initially lowered neutral position shown in FIG Fig.
  • a clamping force of the gimp thread clamping lever 25 on the gimp thread 16 is predetermined via the clamping force setting unit 27 in such a way that the pulling force of the gimp thread 16 for changing over the gimp thread clamping lever 25 into the gimp thread pulling position Fig. 3 when sewing the eye-buttonhole seam 20 is sufficient.
  • the gimp thread clamping lever 25 When switching the gimp thread clamping lever 25 between the neutral position and the gimp thread pulling position triggers the monitoring sensor 30 and reports the controller 38 via the signal line 39, the signal "correct gimp thread entrainment".
  • the sewing program for sewing the eyelet buttonhole seam 20 is then processed by the sewing machine.
  • the end of the eye-buttonhole seam 20 is in the embodiment after Fig. 4 open, but may also have a wedge lock 46 at location 46.
  • the needle thread 7, the gimp thread 16 and the looper thread 22 are cut by the thread cutter 37. Due to the weight of the gimp thread clamping lever 25 this pivots after cutting off the gimp thread 16, ie in the absence of gimp thread tension, from the gimp thread pull position back to the neutral position.
  • the gimp thread 16 is withdrawn so far through the passage opening 15 in the throat plate 14 that the gimp thread 16 is safely taken the next time an eyelet button seam 20 during formation of the bead of the needle thread 7 and the looper thread 22, with a free end of the gimp thread 16 is not too long, so that it unwanted protrudes from the generated bead and affects the optical quality of the eye buttonhole formed.
  • the retracted during pivoting back of the gimp thread clamping lever 25 in the neutral position gimp thread length can be specified via the stop 33.
  • the cutting device 18 cuts the eye buttonhole.
  • the switching unit 36 of the monitoring sensor 30 does not trigger at the start of sewing the eyelet buttonhole seam 20.
  • the timer program may be a program module of the entire eye buttonhole sewing program.
  • the timer program outputs the signal "error at the start of the eyelet buttonhole sewing" after a predetermined period of time from the beginning of the sewing of the eye buttonhole seam without the switching unit 36 triggers.
  • the control device 38 then interrupts the sewing process and outputs on a display 47 of the sewing machine an error message. The operator may then decide whether to continue the eyelet buttonhole sewing program without the gimp thread 16 or to cancel altogether.
  • the gimp thread breaks or the gimp thread supply is used up and therefore there is no gimp thread tension connection between the stitch area and the gimp thread clamping lever 25, this returns from the gimp thread pulling position to the neutral position, so that the switching unit 36 of the monitoring sensor 30 during the eye buttonhole sewing program triggers.
  • the switching unit 36 then outputs via the signal line 39 to the control device 38, the signal "error during the Augenknopfloch-sewing".
  • the controller 38 then also interrupts the sewing program and outputs a corresponding error message on the display 47, so that the operator can decide again whether the sewing should continue or be canceled.
  • the monitor sensor 30 may also be configured such that the switching unit 36 will trip when the gimp threading clamp lever 25 is in the neutral position in a pivoted position of the sewing that it occupies during sewing the eye buttonhole seam 20. If the gimp thread has not been or will not be tightened in this pivot position and the switching unit 36 of the monitoring sensor 30 triggers during the sewing program, the control device 38 can interrupt the sewing process again and output a corresponding error message on the display 47, so that the operator can decide whether the sewing continue or abort.
  • the monitoring sensor 30 may be implemented "Pivoting sewing" together with the gimp thread clamping lever 25 may be mounted on a pivotable sewing machine carrier so that triggering of a switching unit 36 of the monitoring sensor 30 in each pivot position of the sewing is possible.

Abstract

The machine has a gimp yarn feeder (23) that supplies a gimp yarn (16) to an eyelet button-hole seam. A gimp tension-thread-guard apparatus (24) has a gimp tension-thread guard unit (25) which guides a gimp yarn. A monitoring sensor (30) monitors the position of a gimp tension-thread guard unit. A gimp tension-thread-guard unit is moved to a gimp webbing appearance position from a neutral position according to the extraction efficacy of the supplied gimp yarn. A control apparatus (38) has a signal connection unit (39) which is provided with monitoring sensor.

Description

Die Erfindung betrifft eine Augenknopfloch-Nähmaschine sowie ein Verfahren zum Nähen einer einen Gimpenfaden aufweisenden Augenknopfloch-Naht.The invention relates to an eyelet buttonhole sewing machine and a method of sewing a eyelet buttonhole seam having a gimp thread.

Eine derartige Nähmaschine ist bekannt aus der EP 1 722 021 B1 . Die Augenknopfloch-Nähmaschine näht die Augenknopfloch-Naht mit drei Fäden, nämlich einem Nadelfaden, einem Greiferfaden und einem Gimpenfaden. Der Gimpenfaden dient dazu, die Optik der Augenknopfloch-Naht und damit des Augenknopflochs gefällig zu gestalten.Such a sewing machine is known from the EP 1 722 021 B1 , The eyelet buttonhole sewing machine sews the eyelet buttonhole seam with three threads, namely a needle thread, a hook thread and a gimp thread. The gimp thread serves to compliment the look of the eyelet buttonhole seam and thus the eye buttonhole.

Aus der DE 19 70 349 U ist eine Knopflochnähmaschine bekannt, bei der ein Gimpenfaden über die Betätigung eines Einrückhebels vor Beginn eines automatischen Nähzyklus zugeführt wird.From the DE 19 70 349 U For example, a buttonhole sewing machine is known in which a gimp thread is fed via the actuation of an engaging lever prior to the beginning of an automatic sewing cycle.

Aus der DE 199 16 660 C1 ist eine automatische Gimpenfadenzuführung bekannt.From the DE 199 16 660 C1 an automatic gimp threadfeed is known.

Es ist eine Aufgabe der vorliegenden Erfindung, eine Augenknopfloch-Nähmaschine sowie ein Nähverfahren zum Nähen einer einen Gimpenfaden aufweisenden Augenknopfloch-Naht mit einem automatischen Nähprogramm derart weiterzubilden, dass beim Nähen der Augenknopfloch-Naht sichergestellt ist, dass dieser Nähvorgang unter Einbeziehung des Gimpenfadens geschieht.It is an object of the present invention to develop an eyelet buttonhole sewing machine and a sewing method for sewing a eyelet buttonhole seam having an automatic sewing program such that when sewing the eyelet buttonhole seam, it is ensured that this sewing operation involves the gimp threading.

Diese Aufgabe ist erfindungsgemäß gelöst durch eine Augenknopfloch-Nähmaschine mit den im Anspruch 1 angegebenen Merkmalen.This object is achieved by an eyelet button sewing machine with the features specified in claim 1.

Erfindungsgemäß wurde erkannt, dass eine Gimpenfaden-Zuführeinrichtung mit einem Überwachungssensor und einer Steuereinrichtung zur Möglichkeit führt, die Einbeziehung des Gimpenfadens beim Nähen der Augenknopfloch-Naht sicher zu überwachen. Falls die Augen-knopfloch-Naht unerwünscht ohne Einbeziehung des Gimpenfadens genäht wird, kann die Steuereinrichtung ein Signal ausgeben und/oder anderweitig Gegenmaßnahmen ergreifen. Wenn der Überwachungssensor erkennt, dass die Gimpenfaden-Zugposition nicht erreicht wird, kann ein entsprechendes Störungssignal an die Steuereinrichtung weitergegeben werden. Ein unerwünschtes Herstellen des Augenknopflochs ohne den Gimpenfaden wird vermieden. Insbesondere kann erkannt werden, dass die Augenknopfloch-Naht unerwünscht ohne Einbeziehen des Gimpenfadens genäht wird, bevor das Nähgut beim Herstellen des Augenknopflochs geschnitten wird. Ein Problem bei der Gimpenfaden-Mitnahme kann daher erkannt werden, bevor das Nähgut durch den unerwünschten Schneidvorgang verloren ist. Die Augenknopfloch-Nähmaschine kann ein Nähwerk haben, das zur Ausbildung der Augenknopfloch-Naht schwenkbar gestaltet ist. Der Überwachungssensor kann so gestaltet sein, dass eine Schalteinheit des Überwachungssensors nur dann auslöst, wenn die Gimpenfaden-Führungseinheit in der Neutralposition in einer bestimmten Schwenkstellung des Nähwerks vorliegt, die die Schwenkstellung während des Nähens der Augenknopfloch-Naht einnimmt. Der Überwachungssensor kann bei der Ausführung "schwenkbares Nähwerk" gemeinsam mit der Gimpenfaden-Führungseinrichtung auf einem schwenkbaren Nähwerk-Träger montiert sein, sodass ein Auslösen einer Schalteinheit des Überwachungssensors in jeder Schwenkstellung des Nähwerks möglich ist.According to the invention, it has been recognized that a gimp thread supply device with a monitoring sensor and a control device leads to the possibility of reliably monitoring the inclusion of the gimp thread when sewing the eye buttonhole seam. If the eye buttonhole suture is undesirably sewn without the inclusion of the gimp thread, the controller may issue a signal and / or otherwise take countermeasures. If the monitor sensor detects that the gimp thread pull position is not reached, a corresponding fault signal may be passed to the controller. Unwanted production of the eye buttonhole without the gimp thread is avoided. In particular, it can be seen that the eyelet buttonhole suture is undesirably sewn without involving the gimp filament before the suture is cut in making the eye buttonhole. A problem with the gimp thread entrainment can therefore be detected before the fabric is lost due to the unwanted cutting process. The eyelet buttonhole sewing machine may have a sewing mechanism that is pivotally configured to form the eyelet buttonhole seam. The monitoring sensor may be configured such that a switching unit of the monitoring sensor only triggers when the gimp thread guide unit is in the neutral position at a certain pivot position of the sewing, which assumes the pivot position during the sewing of the eyelet buttonhole seam. The monitoring sensor can be mounted on a pivotable sewing machine carrier together with the gimp thread guiding device in the "pivotable sewing machine" embodiment, so that triggering of a switching unit of the monitoring sensor is possible in any pivoting position of the sewing work.

Eine Klemmhebel-Ausführung der Gimpenfaden-Führungseinheit nach Anspruch 2 ist kostengünstig. Der Klemmhebel kann den Gimpenfaden gleichzeitig klemmen und führen.A clamping lever embodiment of the gimp thread guiding unit according to claim 2 is inexpensive. The clamping lever can clamp and guide the gimp thread at the same time.

Eine Ausführung des Überwachungssensors nach Anspruch 3 vermeidet Verschleiß. Der Überwachungssensor kann als Induktionssensor, kann als kapazitiver Sensor oder kann als optischer Sensor, z. B. als Lichtschranke, ausgeführt sein.An embodiment of the monitoring sensor according to claim 3 avoids wear. The monitoring sensor can be used as an induction sensor, as a capacitive sensor or as an optical sensor, for. B. as a light barrier, be executed.

Eine Faden-Abschneideinrichtung nach Anspruch 4 führt zu einem reproduzierbaren Fadenschnitt nach der Ausbildung der Augenknopfloch-Naht.A thread cutting device according to claim 4 leads to a reproducible thread cut after the formation of the eye buttonhole seam.

Eine Führungseinheit nach Anspruch 5 kehrt automatisch nach Beenden des Augenknopfloch-Nähprogramms in die Neutralposition als Ausgangsposition zurück. Wenn die Führungseinheit als den Gimpenfaden klemmende Einheit ausgeführt ist, wird der Gimpenfaden beim Rückkehren der Führungseinheit in die Neutralposition automatisch zurückgezogen, sodass ein unerwünschtes Überstehen des Gimpenfadens am Nahtbeginn der anschließend genähten Augenknopfloch-Naht vermieden ist.A guide unit according to claim 5 automatically returns to the neutral position as the home position upon completion of the eye buttonhole sewing program. When the guide unit is implemented as the gimp thread-clamping unit, the gimp thread is automatically withdrawn upon return of the guide unit to the neutral position, thus avoiding unwanted protrusion of the gimp thread at the seam beginning of the subsequently sewn eye buttonhole seam.

Ein verstellbarer Anschlag nach Anspruch 6 ermöglicht die Vorgabe der Stellung der Führungseinheit in der Neutralposition. Dies kann zum Feinjustieren des Überwachungssensors und/oder zur Vorgabe einer bei der Rückkehr der dann klemmend ausgeführten Führungseinheit in die Neutralposition rückgezogenen Gimpenfadenlänge genutzt werden. Der verstellbare Anschlag kann über eine Anschlagschraube realisiert sein.An adjustable stop according to claim 6 allows the specification of the position of the guide unit in the neutral position. This can be used for fine adjustment of the monitoring sensor and / or for specifying a retracted at the return of the then executed clamping unit guide unit in the neutral position gimp thread length. The adjustable stop can be realized via a stop screw.

Eine Klemmkraft-Vorgabeeinheit nach Anspruch 7 ermöglicht eine Feineinstellung der Klemmkraft des Gimpenfaden-Klemmhebels, so das der beim Nähen der Augenknopfloch-Naht mitgenommene Gimpenfaden eine einerseits ausreichend große Zugkraft auf den Klemmhebel, um diesen in die Gimpenfaden-Zugposition zu überführen, ausübt, andererseits aber keine zu große Zugspannung, die das Mitnehmen des Gimpenfadens erschwert, vorliegt. Die Klemmkraft-Vorgabeeinheit kann über eine verstellbare Klemmfeder realisiert sein. Zur Verstellung der Klemmfeder kann eine Stellschraube dienen.A clamping force setting unit according to claim 7 allows a fine adjustment of the clamping force of the gimp thread clamping lever, so that when sewing the eyelet buttonhole entrained gimp thread on the one hand sufficiently large pulling force on the clamping lever to transfer this in the gimp thread pulling position exerts, on the other hand, but not too high tensile stress, which makes it difficult to take along the gimp thread. The clamping force specification unit can be realized via an adjustable clamping spring. To adjust the clamping spring can serve a set screw.

Die Vorteile eines Nähverfahrens nach Anspruch 8 entsprechen denjenigen, die vorstehend in Bezug auf die Augenknopfloch-Nähmaschine bereits erläutert wurden. Dieses Nähverhalten beinhaltet eine automatisch ablaufende Überwachung insbesondere des Vorhandenseins des zu vernähenden Gimpenfadens.The advantages of a sewing method according to claim 8 are similar to those already explained above with respect to the eyelet buttonhole sewing machine. This sewing behavior involves an automatic monitoring, in particular the presence of the gimp thread to be sewn.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. In dieser zeigen:

Fig. 1
eine Seitenansicht einer Augenknopfloch-Nähmaschine mit einer Gimpenfaden-Zuführeinrichtung;
Fig. 2
in einer perspektivischen Detailansicht, bei der eine Grund-platten-Gehäuseabdeckung der Nähmaschine abgenommen ist, die Gimpenfaden-Zuführeinrichtung mit einer Gimpenfaden-Führungseinrichtung in einer Neutralposition;
Fig. 3
in einer zu Fig. 2 ähnlichen Darstellung die Gimpenfaden-Zuführeinrichtung mit der Gimpenfaden-Führungseinrichtung in einer Gimpenfaden-Zugposition; und
Fig. 4
ein mit der Nähmaschine genähtes Augenknopfloch mit einer Augenknopflochnaht, genäht mit dem Gimpenfaden, einem Nadelfaden und einem Greiferfaden.
An embodiment of the invention will be explained in more detail with reference to the drawing. In this show:
Fig. 1
a side view of an eyelet buttonhole sewing machine with a gimp thread feeding device;
Fig. 2
in a perspective detail view, in which a base plate housing cover of the sewing machine is removed, the gimp thread feeding device with a gimp thread guiding device in a neutral position;
Fig. 3
in one too Fig. 2 similar representation of the gimp thread feeding device with the gimp thread guiding device in a gimp thread pulling position; and
Fig. 4
an eyelet buttonhole sewn to the sewing machine with an eyelet buttonhole seam sewn with the gimp thread, a needle thread and a hook thread.

Wie Fig. 1 entnehmbar ist, ist eine Augen-Knopfloch-Nähmaschine C-förmig ausgebildet, d. h. sie weist einen oberen Arm 1, eine untere, gehäuseartig ausgebildete Grundplatte 2 und einen beide verbindenden, etwa vertikalen Ständer 3 auf. Im Arm 1 ist in üblicher Weise eine Armwelle 4 gelagert, die von einem nicht dargestellten Antriebsmotor antreibbar ist. Die Anordnung eines solchen Antriebsmotors an einer solchen Nähmaschine ist aus DE 102 25 511 C1 und DE 102 25 512 C1 bekannt. Von der Armwelle 4 werden in üblicher Weise der Antrieb einer vertikal verschiebbaren Nadelstange 5 mit einer Nadel 6 und ein Schwingantrieb hierfür abgeleitet. Die Nadel 6 führt einen Nadelfaden 7.As Fig. 1 can be removed, an eye-buttonhole sewing machine C-shaped, that is, it has an upper arm 1, a lower, cabinet-like base plate 2 and an interconnecting, approximately vertical stand 3 on. In the arm 1, an arm shaft 4 is mounted in a conventional manner, which is driven by a drive motor, not shown. The arrangement of such a drive motor on such a sewing machine is off DE 102 25 511 C1 and DE 102 25 512 C1 known. From the arm shaft 4, the drive of a vertically displaceable needle bar 5 with a needle 6 and a vibratory drive are derived for this purpose in a conventional manner. The needle 6 guides a needle thread 7.

Zur Erleichterung der Erläuterung von Lagebeziehungen wird nachfolgend ein kartesisches xyz-Koordinatensystem verwendet. Die x-Achse verläuft in der Fig. 1 senkrecht zur Zeichenebene und aus dieser heraus. Die y-Achse verläuft in der Fig. 1 nach rechts. Die z-Achse verläuft in der Fig. 1 nach oben.To facilitate the explanation of positional relationships, a Cartesian xyz coordinate system is used below. The x-axis runs in the Fig. 1 perpendicular to the drawing plane and out of it. The y-axis runs in the Fig. 1 to the right. The z-axis runs in the Fig. 1 up.

Auf der Grundplatte 2 ist ein x-y-Tisch 8 angeordnet, bei dem es sich um einen in zwei horizontalen Koordinatenrichtungen, nämlich der x-Richtung und der y-Richtung, verschiebbaren Kreuzschlitten handelt. Der x-y-Tisch 8 ist in üblicher Weise ausgebildet, wie es beispielsweise aus der DE 198 07 771 C1 (entspr. US 6,095,066 ) bekannt ist. Der Antrieb des x-y-Tisches 8 erfolgt mittels nicht dargestellter Antriebe, nämlich eines x-Antriebes und eines y-Antriebes, bei denen es sich üblicher Weise um positionierbare Elektromotoren, in der Regel also Schrittmotoren, aber auch regelbare Gleichstrommotoren, handelt. Eine derartige Ausgestaltung ist aus der DE 102 25 511 1 C1 und der DE 102 25 512 C1 bekannt.On the base plate 2, an xy stage 8 is arranged, which is a cross slide movable in two horizontal coordinate directions, namely the x direction and the y direction. The xy-table 8 is formed in a conventional manner, as for example from the DE 198 07 771 C1 (Corr. US 6,095,066 ) is known. The drive of the xy-table 8 by means not shown drives, namely an x-drive and a y-drive, which are usually manner to positionable electric motors, so usually stepper motors, but also controllable DC motors, acts. Such a configuration is from the DE 102 25 511 1 C1 and the DE 102 25 512 C1 known.

Auf dem x-y-Tisch 8 ist eine zweiteilige Stützplatte 9 angeordnet. Jeder Teil-Stützplatte 9 ist eine Nähgutklammer 10 zugeordnet. Eine derartige Anordnung ist aus der EP 1 722 021 B 1 bekannt. Nähgutklammern 10 haben jeweils eine Klemmplatte 11. Nähgut 12 kann zwischen den Klemmplatten 11 und einer Auflageplatte 13 geklemmt werden. In einer Öffnung der Auflageplatte 13 ist eine Stichplatte 14 mit einer Durchtrittsöffnung 15 (vgl. Fig. 2) für einen Gimpenfaden 16 angeordnet. Die Klemmplatten 11 sind an doppelarmigen Lagerhebeln 17 angebracht. Einzelheiten des Aufbaus und des Antriebs der Nähgutklammern 10 ergeben sich aus der DE 102 16 808 C2 (entsprechend US 6,722,299 B2 ), auf die insoweit verwiesen wird.On the xy table 8, a two-part support plate 9 is arranged. Each partial support plate 9 is associated with a Nähgutklammer 10. Such an arrangement is known from EP 1 722 021 B 1 known. Sewing material clamps 10 each have a clamping plate 11. Sewing material 12 can be clamped between the clamping plates 11 and a support plate 13. In an opening of the support plate 13 is a throat plate 14 with a passage opening 15 (see. Fig. 2 ) arranged for a gimp thread 16. The clamping plates 11 are attached to double-armed bearing levers 17. Details of the structure and the drive of the Nähgutklammern 10 result from the DE 102 16 808 C2 (corresponding US 6,722,299 B2 ), to which extent is referred.

In y-Richtung gesehen hinter der Nadelstange 5 befindet sich eine Knopfloch-Schneidvorrichtung 18, die eine untere, in der Grundplatte 2 vertikal, also in z-Richtung, ortsfest angeordnete, nicht dargestellte Messer-Einheit und einen oberen Schneidblock 19 aufweist. Einzelheiten des Aufbaus der Schneidvorrichtung 18 ergeben sich aus der EP 1 722 021 B1 .As seen in the y-direction behind the needle bar 5 is a buttonhole cutting device 18, which has a lower, in the base plate 2 vertically, ie in the z-direction, stationarily arranged, not shown, knife unit and an upper cutting block 19. Details of the structure of the cutting device 18 will be apparent from the EP 1 722 021 B1 ,

Zu einem Nähwerk der Nähmaschine gehört neben der Nadelstange 5 noch ein hiermit synchronisiert zur Ausbildung einer Augenknopfloch-Naht 20 (vgl. Fig. 4) arbeitender Greifer 21. Aus einem im Greifergehäuse untergebrachten Fadenvorrat wird einem Stichbildungsbereich bzw. der zu bildenden Augenknopfloch-Naht ein Greiferfaden 22 zugeführt.To a sewing machine of the sewing machine next to the needle bar 5 is still a hereby synchronized to form an eye buttonhole seam 20 (see. Fig. 4 ) Working gripper 21. From a housed in the gripper housing yarn supply a stitching area or the eye buttonhole seam to be formed a looper thread 22 is supplied.

Der Gimpenfaden 16 wird dem Stichbildungsbereich mittels einer Gimpenfaden-Zuführeinrichtung 23 zugeführt. Die Gimpenfaden-Zuführeinrichtung 23 ist im Detail in den Fig. 2 und 3 dargestellt. Die Gimpenfaden-Zuführeinrichtung 23 hat eine Gimpenfaden-Führungseinrichtung 24 mit einer den Gimpenfaden 16 führenden Gimpenfaden-Führungseinheit 25. Die Gimpenfaden-Führungseinheit 25 ist als den Gimpenfaden 16 klemmender Gimpenfaden-Klemmhebel ausgebildet. Zum Klemmen des Gimpenfadens 16 hat der Gimpenfaden-Klemmhebel 25 ein Klemmblech 26. Zur Vorgabe einer Gimpenfaden-Klemmkraft, die der Gimpenfaden-Klemmhebel 25 auf den Gimpenfaden 16 ausübt, dient eine Klemmkraft-Vorgabeeinheit 27. Letztere ist als Feder ausgeführt, die über eine Stellschraube 28 mit vorgebbarer Kraft auf das Klemmblech 26 drückt.The gimp thread 16 is fed to the stitch forming area by means of a gimp thread feeding device 23. The gimp thread feeder 23 is in detail in the Fig. 2 and 3 shown. The gimp thread feeder 23 has a gimp thread guide device 24 with a gimp thread guide unit 25 guiding the gimp thread 16. The gimp thread guide unit 25 is formed as the gimp thread 16 clamping gimp thread clamp lever. To fix the gimp thread 16, the gimp thread clamping lever 25 has a clamping plate 26. To specify a gimp thread clamping force exerted by the gimp thread clamping lever 25 on the gimp thread 16, serves a clamping force-specifying unit 27. The latter is designed as a spring which has a Adjusting screw 28 with specifiable force on the clamping plate 26 presses.

Ein freies Ende des Klemmblechs 26 ist als Schaltfahne 29 ausgestaltet. Letztere ist Teil eines Überwachungssensors 30 zur Überwachung einer Position der Gimpenfaden-Führungseinheit 25, also des Klemmhebels.A free end of the clamping plate 26 is designed as a switching lug 29. The latter is part of a monitoring sensor 30 for monitoring a position of the gimp thread guide unit 25, ie the clamping lever.

Der Gimpenfaden-Klemmhebel 25 ist eine über den zu vernähenden Gimpenfaden 16 verlagerbare Nähkomponente. Der Gimpenfaden-Klemmhebel 25 ist um ein Schwenkgelenk 31 mit horizontaler, parallel zur z-Achse verlaufender Schwenkachse relativ zu einem gehäusefesten Lagerbock 32 zwischen einer in der Fig. 2 dargestellten Neutralposition und einer in der Fig. 3 dargestellten Gimpenfaden-Zugposition schwenkbar. Eine Stellung des Gimpenfaden-Klemmhebels 25 in der Neutralposition ist über einen verstellbaren Anschlag 33 vorgebbar. Letzterer hat eine durch den Lagerbock 32 hindurchgeschraubte Anschlagschraube 34, deren freies Ende in der Neutralposition an einem Gegenanschlags-Ausleger 35 des Gimpenfaden-Klemmhebels 25 anliegt. Durch Ein- bzw. Ausschrauben der Anschlagschraube 34 kann z. B. eine Stellung der Schaltfahne 29 relativ zu einer Schalteinheit 36 des Überwachungssensors 30 feinjustiert werden. Der Überwachungssensor 30 ist als berührungsloser Sensor ausgeführt. Der Überwachungssensor 30 kann als Induktionssensor, kann als kapazitiver Sensor oder kann als optischer Sensor ausgeführt sein. Ein Beispiel für einen optischen Sensor ist eine Lichtschranke.The gimp thread clamping lever 25 is a sewing component which can be displaced over the gimp thread 16 to be sewn. The gimp thread clamping lever 25 is about a pivot joint 31 with a horizontal, parallel to the z-axis pivot axis relative to a housing-fixed bracket 32 between a in the Fig. 2 shown neutral position and one in the Fig. 3 pivoted gimp thread pulling position shown. A position of the gimp thread clamping lever 25 in the neutral position can be predetermined via an adjustable stop 33. The latter has a screwed through the bearing block 32 stop screw 34, the free end rests in the neutral position on a counter-stop boom 35 of the gimp thread clamping lever 25. By screwing in or unscrewing the stop screw 34 z. B. a position of the switching flag 29 are relatively adjusted relative to a switching unit 36 of the monitoring sensor 30. Of the Monitoring sensor 30 is designed as a contactless sensor. The monitoring sensor 30 may be designed as an induction sensor, as a capacitive sensor or as an optical sensor. An example of an optical sensor is a light barrier.

In der Grundplatte 2 ist eine schematisch in der Fig. 1 angedeutete Faden-Abschneideinrichtung 37 untergebracht, mit der nach dem vollständigen Ausbilden der Augenknopfloch-Naht 20 der Nadelfaden 7, der Gimpenfaden 16 und der Greiferfaden 22 abgeschnitten werden.In the base plate 2 is a schematic in the Fig. 1 indicated thread cutting device 37 is housed, with the after the complete formation of the eye buttonhole seam 20 of the needle thread 7, the gimp thread 16 and the looper thread 22 are cut off.

Die Nähmaschine hat weiterhin eine Steuereinrichtung 38, die in den Fig. 1 und 2 ebenfalls schematisch dargestellt ist und über Signalleitung 39 mit der Schalteinheit 36 des Überwachungssensors 30 in Signalverbindung steht.The sewing machine further has a control device 38, which in the Fig. 1 and 2 is also shown schematically and is connected via signal line 39 to the switching unit 36 of the monitoring sensor 30 in signal connection.

In der Gimpenfaden-Zuführeinrichtung 23 wird der Gimpenfaden 16 dem Stichbereich von einem Gimpenfaden-Vorrat, der in der Zeichnung nicht dargestellt ist, über eine Zuführhülse 40 zugeführt. Von dort wird der Weg des Gimpenfadens 16 zunächst durch einen Führungsdraht 41 und anschließend über eine gehäusefeste Führungsöffnung 42 geführt. Nach der Führungsöffnung 42 dient der Gimpenfaden-Klemmhebel 25 der Führung des Gimpenfadens 16. Im Anschluss an die Führung durch den Gimpenfaden-Klemmhebel 25 durchtritt der Gimpenfaden 16 zunächst eine weitere, gehäusefeste Führungsöffnung 42, eine weitere, gehäusefeste Klemmeinheit 44 und eine weitere, gehäusefeste Führungsöffnung 45. Im Anschluss hieran durchtritt der Gimpenfaden 16 die Durchtrittsöffnung 15 der Stichplatte 14.In the gimp thread feeder 23, the gimp thread 16 is fed to the stitch portion of a gimp thread supply, not shown in the drawing, via a feed sleeve 40. From there, the path of the gimp thread 16 is initially guided by a guide wire 41 and then via a housing-fixed guide opening 42. Following the guide opening 42, the gimp thread clamping lever 25 serves to guide the gimp thread 16. Following the guide through the gimp thread clamping lever 25, the gimp thread 16 first passes through a further guide opening 42 fixed to the housing, a further clamping unit 44 fixed to the housing and another, fixed to the housing Guide opening 45. Following this, the gimp thread 16 passes through the passage opening 15 of the throat plate 14.

Beim Nähen der Augenknopfloch-Naht 20 wird das Nähgut 12 auf den xy-Tisch 8 positioniert und von den Klemmplatten 11, die auch als Klammern bezeichnet werden, während des Transports gehalten. Zu Beginn des Nähens der Augenknopfloch-Naht 20 wird durch Ausführen einer Zick-ZackNaht mit Hilfe des Nadelfadens 7 und des Greiferfadens 22 eine Raupe gebildet, die den Gimpenfaden 16 nach dessen Austritt aus der Stichplatte 14 umsticht, festklemmt, mitzieht und dabei kontinuierlich über die Gimpenfaden-Zuführeinrichtung 23 nachführt. Die hierbei auf den Gimpenfaden 16 während des Ausbildens der Augenknopfloch-Naht 20 ausgeübte Zugkraft bewirkt, dass der Gimpenfaden 26 den Gimpenfaden-Klemmhebel 25 aus der zunächst abgesenkten Neutralposition, die in der Fig. 2 dargestellt ist, in die angehobene Gimpenfaden-Zugposition um das Schwenkgelenk 31 verschwenkt, die in der Fig. 3 dargestellt ist. Über die Klemmkraft-Vorgabeeinheit 27 wird eine Klemmkraft des Gimpenfaden-Klemmhebels 25 auf den Gimpenfaden 16 so vorgegeben, dass die Zugkraft des Gimpenfadens 16 zum Umstellen des Gimpenfaden-Klemmhebels 25 in die Gimpenfaden-Zugposition nach Fig. 3 beim Nähen der Augen-knopfloch-Naht 20 ausreicht. Bei der Umstellung des Gimpenfaden-Klemmhebels 25 zwischen der Neutralposition und der Gimpenfaden-Zugposition löst der Überwachungssensor 30 aus und meldet der Steuereinrichtung 38 über die Signalleitung 39 das Signal "korrekte Gimpenfaden-Mitnahme". Das Nähprogramm zum Nähen der Augenknopfloch-Naht 20 wird dann von der Nähmaschine abgearbeitet. Dabei wird die Augenknopfloch-Naht 20, wie in der Fig. 4 dargestellt, genäht. Das Ende der Augen-knopfloch-Naht 20 ist beim Ausführungsbeispiel nach Fig. 4 offen, kann aber auch am Ort 46 einen Keilriegel 46 aufweisen. Am Ende des Nähprogramms werden der Nadelfaden 7, der Gimpenfaden 16 und der Greiferfaden 22 durch die Faden-Abschneideinrichtung 37 geschnitten. Aufgrund des Eigengewichts des Gimpenfaden-Klemmhebels 25 schwenkt dieser nach dem Abschneiden des Gimpenfadens 16, also bei fehlender Gimpenfaden-Zugspannung, von der Gimpenfaden-Zugposition zurück in die Neutralposition. Der Gimpenfaden 16 wird dabei durch die Durchtrittsöffnung 15 in der Stichplatte 14 so weit zurückgezogen, dass der Gimpenfaden 16 beim nächsten Anlegen einer Augenknopfloch-Naht 20 beim Ausbilden der Raupe des Nadelfadens 7 und des Greiferfadens 22 sicher mitgenommen wird, wobei ein freies Ende des Gimpenfadens 16 nicht zu lange ist, sodass es unerwünscht aus der erzeugten Raupe übersteht und die optische Qualität des gebildeten Augenknopflochs beeinträchtigt. Die beim Zurückschwenken des Gimpenfaden-Klemmhebels 25 in die Neutralposition zurückgezogene Gimpenfadenlänge kann über den Anschlag 33 vorgegeben werden.When sewing the eyelet buttonhole seam 20, the fabric 12 is positioned on the xy table 8 and held by the clamping plates 11, which are also referred to as brackets, during transport. At the beginning of sewing the eye buttonhole seam 20 is formed by performing a zig-zag seam using the needle thread 7 and the looper thread 22, a bead that surrounds the gimp thread 16 after exiting the throat plate 14, clamps, moves along and thereby continuously over the Gimp thread feeder 23 nachzuführen. The pulling force exerted on the gimp thread 16 during the formation of the eyelet buttonhole seam 20 causes the gimp thread 26 to move the gimp thread clamping lever 25 from the initially lowered neutral position shown in FIG Fig. 2 is pivoted in the raised gimp thread pulling position about the pivot joint 31, which in the Fig. 3 is shown. A clamping force of the gimp thread clamping lever 25 on the gimp thread 16 is predetermined via the clamping force setting unit 27 in such a way that the pulling force of the gimp thread 16 for changing over the gimp thread clamping lever 25 into the gimp thread pulling position Fig. 3 when sewing the eye-buttonhole seam 20 is sufficient. When switching the gimp thread clamping lever 25 between the neutral position and the gimp thread pulling position triggers the monitoring sensor 30 and reports the controller 38 via the signal line 39, the signal "correct gimp thread entrainment". The sewing program for sewing the eyelet buttonhole seam 20 is then processed by the sewing machine. In this case, the eye buttonhole seam 20, as in the Fig. 4 shown, sewn. The end of the eye-buttonhole seam 20 is in the embodiment after Fig. 4 open, but may also have a wedge lock 46 at location 46. At the end of the sewing program, the needle thread 7, the gimp thread 16 and the looper thread 22 are cut by the thread cutter 37. Due to the weight of the gimp thread clamping lever 25 this pivots after cutting off the gimp thread 16, ie in the absence of gimp thread tension, from the gimp thread pull position back to the neutral position. The gimp thread 16 is withdrawn so far through the passage opening 15 in the throat plate 14 that the gimp thread 16 is safely taken the next time an eyelet button seam 20 during formation of the bead of the needle thread 7 and the looper thread 22, with a free end of the gimp thread 16 is not too long, so that it unwanted protrudes from the generated bead and affects the optical quality of the eye buttonhole formed. The retracted during pivoting back of the gimp thread clamping lever 25 in the neutral position gimp thread length can be specified via the stop 33.

Nach dem Abschneiden der Fäden 7, 16, 22 schneidet die Schneidvorrichtung 18 das Augenknopfloch auf.After cutting off the threads 7, 16, 22, the cutting device 18 cuts the eye buttonhole.

Für den Fall, dass der Gimpenfaden 16 bei Beginn des Nähens der Augen-knopfloch-Naht 20 nicht vom Nadelfaden umstochen und mitgenommen wird, hebt sich der Gimpenfaden-Klemmhebel 25, da der Gimpenfaden 16 nicht angezogen wird, nicht aus der Neutralposition an, verharrt also in dieser. Entsprechend löst die Schalteinheit 36 des Überwachungssensors 30 beim Beginn des Nähens der Augenknopfloch-Naht 20 nicht aus. Dies wird durch ein entsprechendes Timer-Programm in der Steuereinrichtung 38 erkannt. Das Timer-Programm kann ein Programmmodul des gesamten Augenknopfloch-Nähprogramms sein. Das Timer-Programm gibt nach Ablauf einer vorgegebenen Zeitspanne ab Beginn des Nähens der Augen-knopfloch-Naht, ohne dass die Schalteinheit 36 auslöst, das Signal "Fehler beim Beginn des Augenknopfloch-Nähens" aus. Die Steuereinrichtung 38 unterbricht dann den Nähvorgang und gibt auf einem Display 47 der Nähmaschine eine Fehlermeldung aus. Der Bediener kann dann entscheiden, ob das Augenknopfloch-Nähprogramm ohne den Gimpenfaden 16 fortgesetzt oder insgesamt abgebrochen werden soll.In the event that the gimp thread 16 is not repositioned and taken along by the needle thread at the start of sewing the eye buttonhole seam 20, the gimp thread clamping lever 25 does not rise from the neutral position because the gimp thread 16 is not tightened so in this. Accordingly, the switching unit 36 of the monitoring sensor 30 does not trigger at the start of sewing the eyelet buttonhole seam 20. This is detected by a corresponding timer program in the control device 38. The timer program may be a program module of the entire eye buttonhole sewing program. The timer program outputs the signal "error at the start of the eyelet buttonhole sewing" after a predetermined period of time from the beginning of the sewing of the eye buttonhole seam without the switching unit 36 triggers. The control device 38 then interrupts the sewing process and outputs on a display 47 of the sewing machine an error message. The operator may then decide whether to continue the eyelet buttonhole sewing program without the gimp thread 16 or to cancel altogether.

Falls während des Nähens des Augenknopfloch-Nähprogramms der Gimpenfaden reißt oder der Gimpenfaden-Vorrat aufgebraucht ist und deswegen keine Gimpenfaden-Zugverbindung zwischen dem Stichbereich und dem Gimpenfaden-Klemmhebel 25 vorliegt, kehrt dieser aus der Gimpenfaden-Zugposition in die Neutralposition zurück, sodass die Schalteinheit 36 des Überwachungssensors 30 während des Augenknopfloch-Nähprogramms auslöst. Die Schalteinheit 36 gibt dann über die Signalleitung 39 an die Steuereinrichtung 38 das Signal "Fehler während des Augenknopfloch-Nähens". Die Steuereinrichtung 38 unterbricht dann ebenfalls das Nähprogramm und gibt eine entsprechende Fehlermeldung am Display 47 aus, sodass der Bediener wieder entscheiden kann, ob das Nähen fortgesetzt oder abgebrochen werden soll.If, during the sewing of the eyelet buttonhole sewing program, the gimp thread breaks or the gimp thread supply is used up and therefore there is no gimp thread tension connection between the stitch area and the gimp thread clamping lever 25, this returns from the gimp thread pulling position to the neutral position, so that the switching unit 36 of the monitoring sensor 30 during the eye buttonhole sewing program triggers. The switching unit 36 then outputs via the signal line 39 to the control device 38, the signal "error during the Augenknopfloch-sewing". The controller 38 then also interrupts the sewing program and outputs a corresponding error message on the display 47, so that the operator can decide again whether the sewing should continue or be canceled.

Wenn das Nähwerk zur Ausbildung der Augenknopfloch-Naht 20 um eine zur z-Achse parallele Achse schwenkbar gestaltet ist, kann der Überwachungssensor 30 auch so gestaltet sein, dass die Schalteinheit 36 dann auslöst, wenn der Gimpenfaden-Klemmhebel 25 in der Neutralposition in einer Schwenkstellung des Nähwerks vorliegt, die diese während des Nähens der Augenknopfloch-Naht 20 einnimmt. Wenn der Gimpenfaden dann in dieser Schwenkstellung nicht angezogen wurde oder wird und die Schalteinheit 36 des Überwachungssensors 30 während des Nähprogramms auslöst, kann die Steuereinrichtung 38 den Nähvorgang wiederum unterbrechen und am Display 47 eine entsprechende Fehlermeldung ausgeben, sodass der Bediener entscheiden kann, ob das Nähen fortgesetzt oder abgebrochen werden soll. Der Überwachungssensor 30 kann bei der Ausführung "schwenkbares Nähwerk" gemeinsam mit dem Gimpenfaden-Klemmhebel 25 auf einem schwenkbaren Nähwerk-Träger montiert sein, sodass ein Auslösen einer Schalteinheit 36 des Überwachungssensors 30 in jeder Schwenkstellung des Nähwerks möglich ist.When the sewing machine for forming the eyelet buttonhole seam 20 is pivotable about an axis parallel to the z-axis, the monitor sensor 30 may also be configured such that the switching unit 36 will trip when the gimp threading clamp lever 25 is in the neutral position in a pivoted position of the sewing that it occupies during sewing the eye buttonhole seam 20. If the gimp thread has not been or will not be tightened in this pivot position and the switching unit 36 of the monitoring sensor 30 triggers during the sewing program, the control device 38 can interrupt the sewing process again and output a corresponding error message on the display 47, so that the operator can decide whether the sewing continue or abort. The monitoring sensor 30 may be implemented "Pivoting sewing" together with the gimp thread clamping lever 25 may be mounted on a pivotable sewing machine carrier so that triggering of a switching unit 36 of the monitoring sensor 30 in each pivot position of the sewing is possible.

Claims (8)

Augenknopfloch-Nähmaschine - mit einem Nähwerk mit einer Nadelstange (5) und einem hiermit synchronisiert zur Ausbildung einer Augenknopfloch-Naht arbeitenden Greifer (21), - mit einer Gimpenfaden-Zuführeinrichtung (23) zur Zuführung eines Gimpenfadens (16) zur Augenknopfloch-Naht (20), - mit einer Gimpenfaden-Führungseinrichtung (24) mit einer den Gimpenfaden (16) führenden Gimpenfaden-Führungseinheit (25), - mit einem Überwachungssensor (30) zur Überwachung einer Position der Gimpenfaden-Führungseinheit (25), - wobei die Gimpenfaden-Führungseinheit (25) durch eine Zugwirkung des der Augenknopfloch-Naht (20) zugeführten Gimpenfadens (16) aus einer Neutralposition in eine Gimpenfaden-Zugposition verlagerbar ist, und - mit einer Steuereinrichtung (38), die mit dem Überwachungssensor (30) in Signalverbindung (39) steht. Eyelet buttonhole sewing machine a sewing machine having a needle bar (5) and a gripper (21) synchronized therewith for forming an eyelet buttonhole seam, - with a gimp thread feeding device (23) for feeding a gimp thread (16) to the eye buttonhole seam (20), with a gimp thread guiding device (24) with a gimp thread guiding unit (25) guiding the gimp thread (16), with a monitoring sensor (30) for monitoring a position of the gimp thread guiding unit (25), - Wherein the gimp thread guide unit (25) by a pulling action of the eyelet button seam (20) supplied gimp yarn (16) from a neutral position is displaced to a gimp thread pulling position, and - With a control device (38) which communicates with the monitoring sensor (30) in signal connection (39). Nähmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Gimpenfaden-Führungseinheit (25) als Gimpenfaden-Klemmhebel ausgeführt ist.Sewing machine according to claim 1, characterized in that the gimp thread guide unit (25) is designed as a gimp thread clamping lever. Nähmaschine nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Überwachungssensor (30) als berührungsloser Sensor ausgeführt ist.Sewing machine according to one of claims 1 or 2, characterized in that the monitoring sensor (30) is designed as a contactless sensor. Nähmaschine nach einem der Ansprüche 1 bis 3, gekennzeichnet durch eine Faden-Abschneideinrichtung (37).Sewing machine according to one of claims 1 to 3, characterized by a thread cutting device (37). Nähmaschine nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Gimpenfaden-Führungseinheit (25) so ausgeführt ist, dass sie sich, sofern sie in einer anderen Position als der Neutralposition steht, durch ihr Eigengewicht bei fehlender Gimpenfaden-Zugspannung in die Neutralposition verlagert.Sewing machine according to one of claims 1 to 4, characterized in that the gimp thread guide unit (25) is designed so that, if it is in a position other than the neutral position, by its own weight in the absence of gimp thread tension in the neutral position relocated. Nähmaschine nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass eine Stellung der Gimpenfaden-Führungseinheit (25) in der Neutralposition über einen verstellbaren Anschlag (32) vorgegeben ist.Sewing machine according to one of claims 1 to 5, characterized in that a position of the gimp thread guide unit (25) in the neutral position via an adjustable stop (32) is predetermined. Nähmaschine nach einem der Ansprüche 2 bis 6, gekennzeichnet durch eine Klemmkraft-Vorgabeeinheit (27) zur Vorgabe einer Gimpenfaden-Klemmkraft, die der Gimpenfaden-Klemmhebel (25) auf den Gimpenfaden (16) ausübt.Sewing machine according to one of claims 2 to 6, characterized by a clamping force setting unit (27) for specifying a gimp thread clamping force exerted by the gimp thread clamping lever (25) on the gimp thread (16). Verfahren zum Nähen einer einen Gimpenfaden (16) aufweisenden Augenknopfloch-Naht (20) mit einem automatischen Nähprogramm mit folgenden Schritten: - Beginnen des Nähvorgangs der Augenknopfloch-Naht (20), - Überwachen der Position einer über den zu vernähenden Gimpenfaden (16) verlagerbaren Nähmaschinenkomponente (25), - Weiterleiten des Überwachungsergebnisses an eine Steuereinrichtung, - abhängig von der bestimmten Position: -- Unterbrechen des Nähprogramms oder -- Fortsetzen des Nähprogramms, -- jeweils mit Hilfe der Steuereinrichtung. A method of sewing an eyelet buttonhole seam (20) having a gimp thread (16) with an automatic sewing program, comprising the steps of: Starting the sewing operation of the eyelet buttonhole seam (20), Monitoring the position of a sewing machine component (25) displaceable over the gimp thread (16) to be sewn, Forwarding the monitoring result to a control device, - depending on the specific position: - interrupting the sewing program or - continue the sewing program, - Each with the help of the control device.
EP12157164.0A 2011-03-23 2012-02-27 Eyelet buttonhole sewing machine and method for sewing and eyelet buttonhole seam comprising a gimp thread Active EP2503041B1 (en)

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DE102011005936A DE102011005936A1 (en) 2011-03-23 2011-03-23 An eyelet buttonhole sewing machine and method for sewing an eyelet buttonhole seam having a gimptive path

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JP2007252740A (en) * 2006-03-24 2007-10-04 Brother Ind Ltd Holing machine

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DE1970349U (en) 1964-08-26 1967-10-12 Duerkoppwerke GIMP FEED DEVICE ON BUTTONHOLE SEWING AND CUTTING MACHINES.
WO1985003957A1 (en) * 1984-02-29 1985-09-12 Tokyo Juki Industrial Co., Ltd. Apparatus for controlling sewing machine
US4953486A (en) * 1987-10-23 1990-09-04 Yasuro Sano Electronic zigzag sewing machine
DE19807771C1 (en) 1998-02-24 1999-04-15 Duerkopp Adler Ag Buttonhole sewing machine
US6095066A (en) 1998-02-24 2000-08-01 Durkopp Adler Ag Eyelet-buttonhole sewing machine
DE19916660C1 (en) 1999-04-14 2000-06-21 Duerkopp Adler Ag Buttonhole sewing machine has a control unit which determines the operation of the drives for cutting and stitching buttonholes of different shapes and/or sizes without manual resetting
US6722299B2 (en) 2001-12-21 2004-04-20 Dürkopp Adler Aktiengesellschaft CNC controlled buttonhole sewing machine
DE10216808C2 (en) 2001-12-21 2003-11-13 Duerkopp Adler Ag CNC buttonhole sewing machine
DE10225512C1 (en) 2002-06-10 2003-07-17 Duerkopp Adler Ag Buttonhole sewing machine has a cutter drive, to move the blade and block in relation to each other with a variable cutting force, through a number of selective pneumatic linear drives switched in parallel
DE10225511C1 (en) 2002-06-10 2003-06-18 Duerkopp Adler Ag Button-hole sewing machine with XY-table, carries adjustable cutting blocks on anvil fixed to machine and causes blade to descend towards it
EP1722021A1 (en) 2005-05-11 2006-11-15 Dürkopp Adler Aktiengesellschaft Button hole sewing machine
EP1722021B1 (en) 2005-05-11 2007-11-14 Dürkopp Adler Aktiengesellschaft Button hole sewing machine
JP2007252740A (en) * 2006-03-24 2007-10-04 Brother Ind Ltd Holing machine

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JP3175645U (en) 2012-05-24
TWI491775B (en) 2015-07-11
DE102011005936A1 (en) 2012-09-27
TW201245529A (en) 2012-11-16
CN102691177A (en) 2012-09-26
CN102691177B (en) 2015-08-05
KR20120109323A (en) 2012-10-08
DE102011005936A8 (en) 2013-01-10
EP2503041B1 (en) 2013-10-09

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