EP1582615A2 - Sewing machine - Google Patents

Sewing machine Download PDF

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Publication number
EP1582615A2
EP1582615A2 EP05006698A EP05006698A EP1582615A2 EP 1582615 A2 EP1582615 A2 EP 1582615A2 EP 05006698 A EP05006698 A EP 05006698A EP 05006698 A EP05006698 A EP 05006698A EP 1582615 A2 EP1582615 A2 EP 1582615A2
Authority
EP
European Patent Office
Prior art keywords
drive
sewing machine
machine according
thread
lever
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
EP05006698A
Other languages
German (de)
French (fr)
Other versions
EP1582615A3 (en
EP1582615B1 (en
Inventor
Thomas Nöltge
Theodor Janocha
Thomas Jordan
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
Duerkopp Adler AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Duerkopp Adler AG filed Critical Duerkopp Adler AG
Publication of EP1582615A2 publication Critical patent/EP1582615A2/en
Publication of EP1582615A3 publication Critical patent/EP1582615A3/en
Application granted granted Critical
Publication of EP1582615B1 publication Critical patent/EP1582615B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • 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
    • 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
    • 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
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B65/00—Devices for severing the needle or lower thread
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2207/00—Use of special elements
    • D05D2207/02—Pneumatic or hydraulic devices

Definitions

  • the invention relates to a sewing machine according to the preamble of the claim 1.
  • the invention is therefore based on the object, a sewing machine of generic type so educate that the reliability of Thread cutter is permanently guaranteed.
  • FIG. 1 there is an eye buttonhole sewing machine C-shaped, d. H. it has an upper arm 1, a lower, housing-like base plate 2 and a connecting both, about vertical stand 3 on.
  • Arm 1 In Arm 1 is in the usual way an arm shaft 4, which can be driven by a drive motor, not shown is. From the arm shaft 4 in the usual way the drive a vertical in the z-direction movable needle bar with a needle. 5 derived.
  • the needle 5 By means of the needle 5 is a needle thread 6 of a not shown Needle thread supply supplied.
  • Grippers arranged which are rotatably driven about a vertical axis 8.
  • the drive of the gripper bearing 7 takes place in the usual manner, as for example from DE 198 07 771 A1 (corresponding to US Pat. No. 6,095,066) is known. Above the gripper bearing 7 is in the base plate 2 a stitch hole approach 9, through which the needle 5 pierces.
  • an x-y table 10 is arranged, in which it is so one in two horizontal coordinate directions, namely the x-direction and the y-direction, sliding cross slide is.
  • the x-y table 10 is formed in a conventional manner, as for example from DE 198 07 771 A1 (corresponding to US-PS 6,095,066) is known.
  • the drive of the x-y table 10 by means of an x-drive and a y-drive, which is positionable electric motors, in the So usually preferred stepper motors, but also controllable DC motors is. These drives are not shown.
  • a two-piece support plate On the x-y table 10, a two-piece support plate is arranged, that is consists of two partial support plates 11 and 11 '. These partial support plates 11 or 11 'are positively on the x-y table 10, but removable held.
  • the bearing lever 14 carries on his free end an upper clamp plate 15.
  • the pivot drive of the bearing lever 14 and thus also the upper clamp plate 15 takes place by means of a drive located in the base plate 2, not shown, in the Individual from EP 1 354 993 A2 (corresponding to US Pat. No. 6,647,905 B2) is.
  • the upper clamp plate 15 is a lower clamp plate 16 assigned, which is mounted on the part support plate 11. The room above the partial support plates 11, 11 'is covered by a cover 17 which Of course, the lower bracket plate 16 leaves free and connects to this.
  • a buttonhole cutter 18 is disposed in the base plate 2, in z-direction immovable cutting blade 19 and one in the arm 1 vertically arranged above the cutting blade 19 anvil 20, the in z-direction down to the cutting blade 19 and back up is drivable.
  • Such a configuration is for example from the DE 199 16 660 C1 (corresponding to US Pat. No. 6,220,192 B1), to which reference is made can be.
  • In the sewing material clamp 13 is between the upper Clamping plate 15 and the lower clamp plate 16 to be sewn Nähgutteil 21 inserted.
  • right - Part support plate 11 is as Scissors trained thread cutter 22 attached. She assigns lower first shearing part 23 and an upper second shearing part 24, the by means of a screw serving as a hinge 25 on the part support plate eleventh are attached, so the attachment, adjustment and rotary connection for the shears parts 23, 24 on the part support plate 11 is used.
  • the scissors parts 23, 24 have at their one end in each case a first cutting edge 26 or a second cutting edge 27 which moves against each other for cutting can be.
  • the double-armed Actuation lever 32 has a first lever arm 34 which with its end form-fitting manner in the first recess 30 of the first Shear part 23 engages. He also has a second lever arm 34th on, with its end form-fitting manner in the second recess 31 of the second shearing part 24 engages.
  • the double-armed actuating lever 32 is by means of a by a pneumatically actuated piston-cylinder drive linear drive formed 36 pivotable.
  • This drive 36 has an opposite the x-y table 10 fixed cylinder 37, the piston rod 38 at corresponding pneumatic loading of the cylinder 37 linearly movable is.
  • the pneumatic admission of the cylinder 37 takes place via a controllable by the control of the sewing machine, not shown Solenoid valve, with the compressed air supply from one as well not shown compressed air source forth.
  • the piston rod 38 is near its outer free end by means of a Guide bearing 39 out.
  • a drive block 40 attached, one transverse to the direction of movement of the piston rod 38 and vertically extending guide link 41 has.
  • this leadership backdrop 41 is an end of a drive lever 42 by means of a guide roller 43 led.
  • the drive lever 42 At its other end is the drive lever 42 by means of a clamping connection 44 rotatably connected to the shaft 33.
  • the drive block 40 is arranged on a below the piston rod 38 Slide plate 45 slidably supported.
  • a positional fuse 46 is provided for the drive lever 42, the Drive lever 42 in the illustrated in Figs. 3 and 5 opening position or rest position of the thread cutter 22 holds when the Part support plate 11 together with thread-cutting device 22 from the x-y table 10th is lifted.
  • This position assurance 46 has a leaf spring designed as a Securing tab 47 on, one end of which is close to the guide bearing 39 by means of a screw 48 on the underside of the partial support plate 11, ie on the linear drive 36 side facing, is attached.
  • the tab 47 thus extends over the entire actuation path the drive block 40 between the drawn Opening position or rest position of the thread cutting device 22 and the dash-dotted line indicated position of the drive lever 42 in the Closed position or working position of the thread cutting device 22.
  • Der Drive lever 42 has on its the guide roller 43 facing away, the partial support plate 11 facing side a cylindrical securing pin 49 on.
  • On the drive block 40 is a by a pin with Semicircular head formed release member 50 attached to the in x-y table 10 inserted part support plate 11 against the securing tab 47 rests and this pushes upwards towards the partial support plate 11, as shown in Fig. 5.
  • the release member 50 no longer the fuse tab 47 rests, then this - as Fig. 6 reveals - Due to their design as a leaf spring elastically deflected down.
  • the securing tab 47 has a projection 51 in the displacement path the guide roller 43 is located and has a securing surface 52, behind which the securing pin 49 in the pulled out in Fig. 3 illustrated rest position of the drive 48, so the open position of the Thread cutter 22 corresponds, can lay. If - as already mentioned - the part-support plate 11 with the thread-cutting device 22 from x-y table 10 is lifted, then comes the securing tab 47th out of engagement with the release member 50, so that the securing tab 47 is deflected down and the securing pin 49 behind the Backup surface 52 of the fuse tab 47 passes. An unintentional Pivoting or or adjusting the drive lever 42 is so excluded with disassembled thread cutting device 22. If the Part support plate 11 with the thread cutter 22 back into the x-y table 10 is used, thus forcibly becomes the leading role 43 inserted into the guide slot 41 of the drive block 40; malfunction and the resulting damage to the thread cutting device 22 are excluded.

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

Abstract

The sewing machine to stitch a seam with an end section (54) of the looper thread (12) has a thread cutter (22) acting as shears, with two shear sections (23,24) and a linear drive (36) to swing them against each other for the thread cutting action. The drive is coupled to the shear sections by a drive lever (42) acting on an operating lever (32), with two arms in a positive fit within openings (30,31) in the shear sections, so that they are opened and closed by the drive mechanism.

Description

Die Erfindung betrifft eine Nähmaschine nach dem Oberbegriff des Anspruches 1.The invention relates to a sewing machine according to the preamble of the claim 1.

Aus dem Prospekt der Dürkopp Adler AG "Doppelkettenstich-Augenknopflochautomat mit CNC-Schrittmotortechnik 579/589" ist eine Augen-Knopfloch-Nähmaschine bekannt, die eine Faden-Schneideinrichtung aufweist, mit der sowohl der Nadelfaden als auch der Greiferfaden und gegebenenfalls auch ein mit dem Greiferfaden vernähter Gimpenfaden kurz abgeschnitten werden. Die Faden-Schneideinrichtung ist nach Art einer Schere mit zwei gegeneinander verschwenkbaren Scherenteilen ausgebildet. Der Antrieb der Scherenteile zum Schließen ihrer Schneiden erfolgt durch einen Linear-Antrieb. Die Auseinanderbewegung der Schneiden unter Öffnen derselben erfolgt durch die Kraft von vorgespannten Federn. Beim Fadenschneiden fällt ein feiner Staub an, der die Bewegbarkeit der Scherenteile gegeneinander so stark beeinträchtigen kann, dass das Öffnen der Schneiden mittels der Federn nicht mehr gewährleistet ist. Hierdurch bedingt kann es zu einer Kollision zwischen der Nadel und einem Scherenteil und damit zum Nadelbruch und weiteren Beschädigungen der Nähmaschine kommen. Diese Schwergängigkeit mit den geschilderten Folgen kann auch eintreten, wenn die beiden Scherenteile beim Justieren zu stark gegeneinander verspannt werden.From the prospectus of the Dürkopp Adler AG "double chainstitch eyelet buttonhole automat with CNC stepper motor technology 579/589 "is an eye buttonhole sewing machine known, which has a thread cutting device, with both the needle thread and the looper thread and optionally also a gimp thread sewed with the looper thread is cut off shortly become. The thread cutter is like a pair of scissors formed with two mutually pivotable scissor parts. The drive of the scissors parts to close their cutting done by a linear drive. The divergence of the cutting under opening the same is done by the force of prestressed springs. When thread cutting A fine dust attracts the mobility of the scissors parts against each other can affect so much that the opening of the Cutting by means of the springs is no longer guaranteed. Conditionally conditioned There may be a collision between the needle and a scissor part and thus for needle breakage and further damage to the sewing machine come. This binding with the described consequences can also occur when the two shear parts when adjusting too strong against each other be tense.

Der Erfindung liegt daher die Aufgabe zu Grunde, eine Nähmaschine der gattungsgemäßen Art so weiterzubilden, dass die Betriebssicherheit der Faden-Schneideinrichtung dauerhaft gewährleistet ist. The invention is therefore based on the object, a sewing machine of generic type so educate that the reliability of Thread cutter is permanently guaranteed.

Diese Aufgabe wird erfindungsgemäß durch das Merkmal im Kennzeichnungsteil des Anspruches 1 gelöst. Durch die erfindungsgemäßen Maßnahmen ist sichergestellt, dass die Faden-Schneideinrichtung nicht nur zwangsweise zum Fadenschneiden geschlossen, sondern durch den Antrieb anschließend zwangsweise auch wieder geöffnet wird.This object is achieved by the feature in the characterizing part of claim 1 solved. By the measures according to the invention Ensures that the thread cutter is not only forced to thread cutting closed, but by the drive subsequently forcibly opened again.

Durch die Weiterbildung gemäß Anspruch 2 und darüber hinaus Anspruch 3 wird eine einfache Zwangskopplung zwischen den beiden Scherenteilen erreicht.Through the development according to claim 2 and beyond claim 3 becomes a simple positive coupling between the two scissor parts reached.

Durch die Weiterbildung nach Anspruch 4 und 5 wird in einfacher Weise ermöglicht, einen Linear-Antrieb zur Erzeugung der Schwenkbewegung der Scherenteile einzusetzen, sodass beispielsweise ein pneumatisch beaufschlagbarer Kolben-Zylinder-Antrieb eingesetzt werden kann.Through the development according to claim 4 and 5 is in a simple manner allows a linear drive to generate the pivoting movement use the scissor parts, so that, for example, a pneumatic acted upon piston-cylinder drive can be used.

Um eine einfache Demontage der Faden-Schneideinrichtung von der Nähmaschine zu ermöglichen, ist die Weiterbildung nach Anspruch 6 vorgesehen, wobei die weiteren vorteilhaften Maßnahmen nach den Ansprüchen 7 bis 9 sicherstellen, dass die Faden-Schneideinrichtung auch in demontiertem Zustand eine definierte Endlage einnimmt, sodass beim Wiedereinsetzen in die Nähmaschine Fehlpositionierungen vermieden werden, die zu einer Beschädigung der Nähmaschine führen könnten.To a simple disassembly of the thread-cutting device of the sewing machine to enable, the development is provided according to claim 6, wherein the further advantageous measures according to claims 7 until 9 make sure the thread cutter is also disassembled State assumes a defined end position, so when reinserting in the sewing machine mispositioning can be avoided, the too could damage the sewing machine.

Weitere Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels an Hand der Zeichnung. Es zeigt

Fig. 1
eine Seiten-Längs-Ansicht einer Augen-Knopfloch-Nähmaschine, wobei ein x-y-Tisch gegenüber einer Nadel in einer Stellung gezeigt ist, in der ein zu benähendes Nähgutteil eingelegt werden kann,
Fig. 2
eine vergrößerte Ansicht auf einen geöffneten Bereich des x-y-Tisches entsprechend dem Sichtpfeil II in Fig. 1, wobei die Darstellung um 90° entgegen dem Uhrzeigersinn gedreht ist und wobei eine Faden-Schneideinrichtung in ihrer Ruhelage dargestellt ist,
Fig. 3
eine vergrößerte, teilweise aufgebrochene Teil-Darstellung aus Fig. 2,
Fig. 4
eine Seitenansicht der Faden-Schneideinrichtung entsprechend dem Sichtpfeil IV in Fig. 3,
Fig. 5
eine Schnittdarstellung in vergrößertem Maßstab entsprechend der Schnittlinie V-V in Fig. 3, wobei die Faden-Schneideinrichtung in ihrer Ruhelage dargestellt ist,
Fig. 6
eine Teil-Darstellung aus Fig. 5 mit der Faden-Schneideinrichtung in vom x-y-Tisch abgenommenen Zustand, in dem eine Lage-Sicherung die Faden-Schneidein-richtung in ihrer Ruhelage sichert und
Fig. 7
eine Draufsicht auf die Faden-Schneideinrichtung in geschlossenem Zustand nach Durchtrennen eines Fadens.
Further details of the invention will become apparent from the following description of an embodiment with reference to the drawing. It shows
Fig. 1
a side longitudinal view of an eye-buttonhole sewing machine, wherein an xy-table is shown opposite a needle in a position in which a sewing material to be sewn part can be inserted,
Fig. 2
an enlarged view of an open area of the xy-table according to the viewing arrow II in Figure 1, wherein the representation is rotated by 90 ° counterclockwise and wherein a thread-cutting device is shown in its rest position.
Fig. 3
an enlarged, partially broken part representation of Fig. 2,
Fig. 4
3 a side view of the thread cutting device corresponding to the viewing arrow IV in FIG. 3,
Fig. 5
a sectional view on an enlarged scale along the section line VV in Fig. 3, wherein the thread-cutting device is shown in its rest position,
Fig. 6
a partial view of Figure 5 with the thread-cutting device removed from the xy-table state in which a position-fuse secures the Faden Schneidein-direction in its rest position and
Fig. 7
a plan view of the thread cutting device in the closed state after cutting a 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. Von der Armwelle 4 werden in üblicher Weise der Antrieb einer vertikalen in z-Richtung verschiebbaren Nadelstange mit einer Nadel 5 abgeleitet. Mittels der Nadel 5 wird ein Nadelfaden 6 von einem nicht dargestellten Nadelfaden-Vorrat zugeführt. Unterhalb der Nadelstange mit Nadel 5 ist in der Grundplatte 2 ein Greiferlager 7 mit nicht dargestellten Greifern angeordnet, die um eine vertikale Achse 8 drehantreibbar sind. Der Antrieb des Greiferlagers 7 erfolgt in üblicher Weise, wie es beispielsweise aus der DE 198 07 771 A1 (entsprechend US-PS 6,095,066) bekannt ist. Oberhalb des Greiferlagers 7 ist in der Grundplatte 2 ein Stichloch-Ansatz 9 angeordnet, durch den die Nadel 5 einsticht.As can be seen in Fig. 1, there is an eye buttonhole sewing machine C-shaped, d. H. it has an upper arm 1, a lower, housing-like base plate 2 and a connecting both, about vertical stand 3 on. In Arm 1 is in the usual way an arm shaft 4, which can be driven by a drive motor, not shown is. From the arm shaft 4 in the usual way the drive a vertical in the z-direction movable needle bar with a needle. 5 derived. By means of the needle 5 is a needle thread 6 of a not shown Needle thread supply supplied. Below the needle bar with Needle 5 is in the base plate 2, a gripper bearing 7 with not shown Grippers arranged which are rotatably driven about a vertical axis 8. The drive of the gripper bearing 7 takes place in the usual manner, as for example from DE 198 07 771 A1 (corresponding to US Pat. No. 6,095,066) is known. Above the gripper bearing 7 is in the base plate 2 a stitch hole approach 9, through which the needle 5 pierces.

Auf der Grundplatte 2 ist ein x-y-Tisch 10 angeordnet, bei dem es sich also um einen in zwei horizontalen Koordinatenrichtungen, nämlich der x-Richtung und der y-Richtung, verschiebbaren Kreuzschlitten handelt. Der x-y-Tisch 10 ist in üblicher Weise ausgebildet, wie es beispielsweise aus der DE 198 07 771 A1 (entsprechend US-PS 6,095,066) bekannt ist. Der Antrieb des x-y-Tisches 10 erfolgt mittels eines x-Antriebes und eines y-Antriebes, bei dem es sich um positionierbare Elektromotoren, in der Regel also bevorzugt Schrittmotoren, aber auch regelbare Gleichstrommotoren handelt. Diese Antriebe sind nicht dargestellt.On the base plate 2, an x-y table 10 is arranged, in which it is so one in two horizontal coordinate directions, namely the x-direction and the y-direction, sliding cross slide is. The x-y table 10 is formed in a conventional manner, as for example from DE 198 07 771 A1 (corresponding to US-PS 6,095,066) is known. The drive of the x-y table 10 by means of an x-drive and a y-drive, which is positionable electric motors, in the So usually preferred stepper motors, but also controllable DC motors is. These drives are not shown.

Auf dem x-y-Tisch 10 ist eine zweiteilige Tragplatte angeordnet, die also aus zwei Teil-Tragplatten 11 und 11' besteht. Diese Teil-Tragplatten 11 bzw. 11' sind auf dem x-y-Tisch 10 formschlüssig, jedoch abnehmbar gehalten. Die Teil-Tragplatten 11, 11' überdecken das Greiferlager 7 und müssen zum Einziehen eines Greiferfadens 12 abgenommen werden, der von einem nicht dargestellten Greiferfaden-Vorrat zugeführt wird. Es kann auch ein Gimpenfaden zugeführt werden, was nicht gesondert dargestellt ist, da es allgemein bekannt ist.On the x-y table 10, a two-piece support plate is arranged, that is consists of two partial support plates 11 and 11 '. These partial support plates 11 or 11 'are positively on the x-y table 10, but removable held. The partial support plates 11, 11 'cover the gripper bearing 7 and must be removed to pull in a looper thread 12, the is fed from a looper thread supply, not shown. It can also a gimp thread are supplied, which is not shown separately is, as it is well known.

Es ist eine Nähgut-Klammer 13 vorgesehen, die einen doppelarmigen schwenkbaren Lagerhebel 14 aufweist. Der Lagerhebel 14 trägt an seinem freien Ende eine obere Klammerplatte 15. Der Schwenkantrieb des Lagerhebels 14 und damit auch der oberen Klammerplatte 15 erfolgt mittels eines in der Grundplatte 2 befindlichen nicht dargestellten Antriebs, der im Einzelnen aus der EP 1 354 993 A2 (entsprechend US 6,647,905 B2) bekannt ist. Der oberen Klammerplatte 15 ist eine untere Klammerplatte 16 zugeordnet, die auf der Teil-Tragplatte 11 befestigt ist. Der Raum oberhalb der Teil-Tragplatten 11, 11' ist durch eine Abdeckung 17 abgedeckt, die selbstverständlich die untere Klammerplatte 16 frei lässt und an diese anschließt.It is a fabric clamp 13 is provided, the two-armed pivotable bearing lever 14 has. The bearing lever 14 carries on his free end an upper clamp plate 15. The pivot drive of the bearing lever 14 and thus also the upper clamp plate 15 takes place by means of a drive located in the base plate 2, not shown, in the Individual from EP 1 354 993 A2 (corresponding to US Pat. No. 6,647,905 B2) is. The upper clamp plate 15 is a lower clamp plate 16 assigned, which is mounted on the part support plate 11. The room above the partial support plates 11, 11 'is covered by a cover 17 which Of course, the lower bracket plate 16 leaves free and connects to this.

In y-Richtung hinter der oberen Klammerplatte 15, also zwischen dieser und dem Ständer 3 ist eine Knopfloch-Schneideinrichtung 18 angeordnet. Die Schneideinrichtung 18 weist ein in der Grundplatte 2 angeordnetes, in z-Richtung unverschiebbares Schneidmesser 19 und einen im Arm 1 senkrecht über dem Schneidmesser 19 angeordneten Amboss 20 auf, der in z-Richtung nach unten zum Schneidmesser 19 und zurück nach oben antreibbar ist. Eine derartige Ausgestaltung ist beispielsweise aus der DE 199 16 660 C1 (entsprechend US 6,220,192 B1) bekannt, worauf verwiesen werden kann. In die Nähgut-Klammer 13 ist zwischen die obere Klammerplatte 15 und die untere Klammerplatte 16 ein zu nähendes Nähgutteil 21 eingelegt. In the y-direction behind the upper clamp plate 15, so between this and the stand 3, a buttonhole cutter 18 is disposed. The cutting device 18 has a arranged in the base plate 2, in z-direction immovable cutting blade 19 and one in the arm 1 vertically arranged above the cutting blade 19 anvil 20, the in z-direction down to the cutting blade 19 and back up is drivable. Such a configuration is for example from the DE 199 16 660 C1 (corresponding to US Pat. No. 6,220,192 B1), to which reference is made can be. In the sewing material clamp 13 is between the upper Clamping plate 15 and the lower clamp plate 16 to be sewn Nähgutteil 21 inserted.

Auf der - in Fig. 2 rechts dargestellten - Teil-Tragplatte 11 ist eine als Schere ausgebildete Faden-Schneideinrichtung 22 angebracht. Sie weist ein unteres erstes Scherenteil 23 und ein oberes zweites Scherenteil 24 auf, die mittels einer als Gelenk 25 dienenden Schraube auf der Teil-Tragplatte 11 befestigt sind, die also zur Befestigung, Einstellung und Drehverbindung für die Scherenteile 23, 24 auf der Teil-Tragplatte 11 dient. Die Scherenteile 23, 24 weisen an ihrem einen Ende jeweils eine erste Schneide 26 bzw. eine zweite Schneide 27 auf, die zum Schneiden gegeneinander bewegt werden können.On the - shown in Fig. 2 right - Part support plate 11 is as Scissors trained thread cutter 22 attached. She assigns lower first shearing part 23 and an upper second shearing part 24, the by means of a screw serving as a hinge 25 on the part support plate eleventh are attached, so the attachment, adjustment and rotary connection for the shears parts 23, 24 on the part support plate 11 is used. The scissors parts 23, 24 have at their one end in each case a first cutting edge 26 or a second cutting edge 27 which moves against each other for cutting can be.

An den den beiden Schneiden 26, 27 abgewandten Seiten, also auf den - von den Schneiden 26, 27 her gesehen - jenseits des Gelenks 25 liegenden Seiten der Scherenteile 23, 24, sind zwei unterschiedlich lange Arme 28, 29, nämlich ein erster längerer Arm 28 am ersten Scherenteil 23 und ein kurzer zweiter Arm 29 am zweiten Scherenteil 24, ausgebildet. Beide unterschiedlich langen Arme 28, 29 weisen zwei einander zugewandte, also zueinander hin offene, als sogenannte Rachen ausgebildete Ausnehmungen 30, 31, nämlich eine erste Ausnehmung 30 und eine zweite Ausnehmung 31, auf. In diese Ausnehmungen 30, 31 greift ein doppelarmiger Betätigungs-Hebel 32 ein, der etwa in seiner Mitte mittels einer die Teil-Tragplatte 11 durchsetzenden Welle 33 an letzterer gelagert ist. Der doppelarmige Betätigungs-Hebel 32 weist einen ersten Hebelarm 34 auf, der mit seinem Ende formschlüssig in die erste Ausnehmung 30 des ersten Scherenteils 23 eingreift. Er weist weiterhin einen zweiten Hebelarm 34 auf, der mit seinem Ende formschlüssig in die zweite Ausnehmung 31 des zweiten Scherenteils 24 eingreift. Bei Verschwenkungen des BetätigungsHebels 32 um seine Welle 33 werden die Scherenteile 23, 24 zwangsweise relativ zueinander um ihr Gelenk 25 verschwenkt, sodass ein Schließen der Faden-Schneideinrichtung 22 zum Schneiden eines Fadens und das Öffnen der Faden-Schneideinrichtung 22 jeweils zwangsgeführt erfolgt.At the two edges 26, 27 facing away from the sides, so on the - seen from the cutting 26, 27 forth - lying beyond the joint 25 Sides of the scissors parts 23, 24, are two arms 28 of different lengths, 29, namely a first longer arm 28 on the first shearing part 23 and a short second arm 29 on the second shearing part 24, formed. Both different long arms 28, 29 have two facing each other, so mutually open, designed as so-called throat recesses 30, 31, namely a first recess 30 and a second recess 31, up. In these recesses 30, 31 engages a double-armed actuating lever 32, which is approximately in its center by means of a partial support plate 11 passing through shaft 33 is mounted on the latter. The double-armed Actuation lever 32 has a first lever arm 34 which with its end form-fitting manner in the first recess 30 of the first Shear part 23 engages. He also has a second lever arm 34th on, with its end form-fitting manner in the second recess 31 of the second shearing part 24 engages. When pivoting the actuating lever 32 around its shaft 33, the shear parts 23, 24 forcibly pivoted about their joint 25 relative to each other, so that closing the Thread cutter 22 for cutting a thread and opening the thread cutting device 22 is positively guided in each case.

Der doppelarmige Betätigungs-Hebel 32 ist mittels eines durch einen pneumatisch beaufschlagbaren Kolben-Zylinder-Antrieb gebildeten Linear-Antrieb 36 schwenkantreibbar. Dieser Antrieb 36 weist einen gegenüber dem x-y-Tisch 10 ortsfesten Zylinder 37 auf, dessen Kolbenstange 38 bei entsprechender pneumatischer Beaufschlagung des Zylinders 37 linear bewegbar ist. Die pneumatische Beaufschlagung des Zylinders 37 erfolgt über ein von der Steuerung der Nähmaschine ansteuerbares, nicht dargestelltes Magnetventil, wobei die Druckluftversorgung von einer ebenfalls nicht dargestellten Druckluftquelle her erfolgt.The double-armed actuating lever 32 is by means of a by a pneumatically actuated piston-cylinder drive linear drive formed 36 pivotable. This drive 36 has an opposite the x-y table 10 fixed cylinder 37, the piston rod 38 at corresponding pneumatic loading of the cylinder 37 linearly movable is. The pneumatic admission of the cylinder 37 takes place via a controllable by the control of the sewing machine, not shown Solenoid valve, with the compressed air supply from one as well not shown compressed air source forth.

Die Kolbenstange 38 ist in der Nähe ihres äußeren freien Endes mittels eines Führungslagers 39 geführt. Auf der Kolbenstange 38 ist ein Antriebsblock 40 befestigt, der eine quer zur Bewegungsrichtung der Kolbenstange 38 und vertikal verlaufende Führungs-Kulisse 41 aufweist. In dieser Führungs-Kulisse 41 ist ein Ende eines Antriebs-Hebels 42 mittels einer Führungsrolle 43 geführt. An seinem anderen Ende ist der Antriebs-Hebel 42 mittels einer Klemm-Verbindung 44 drehfest mit der Welle 33 verbunden. Der Antriebsblock 40 ist auf einer unterhalb der Kolbenstange 38 angeordneten Gleitplatte 45 verschiebbar abgestützt. Wenn die Kolbenstange 38 aus dem Zylinder 37 - in Fig. 3 und 5 nach rechts - ausgefahren wird, dann wird der Antriebsblock 40 mit dem Antriebs-Hebel 42 aus der in Fig. 3 ausgezogen dargestellten Position in die strichpunktiert angedeutete Position verfahren und hierdurch der Betätigungs-Hebel 32 im Gegenuhrzeigersinn verschwenkt, wodurch die die Faden-Schneideinrichtung 22 bildende Schere geschlossen, also in ihre Arbeitsstellung verbracht wird, wie es in Fig. 7 dargestellt ist. The piston rod 38 is near its outer free end by means of a Guide bearing 39 out. On the piston rod 38 is a drive block 40 attached, one transverse to the direction of movement of the piston rod 38 and vertically extending guide link 41 has. In this leadership backdrop 41 is an end of a drive lever 42 by means of a guide roller 43 led. At its other end is the drive lever 42 by means of a clamping connection 44 rotatably connected to the shaft 33. The drive block 40 is arranged on a below the piston rod 38 Slide plate 45 slidably supported. When the piston rod 38 from the cylinder 37 - in Fig. 3 and 5 to the right - is extended, then the drive block 40 with the drive lever 42 from the in Fig. 3rd pulled position shown in the dash-dotted line indicated position method, and thereby the actuating lever 32 in the counterclockwise direction pivoted, whereby the thread cutting device 22 forming Scissors closed, so spent in their working position, as in Fig. 7 is shown.

An der die Faden-Schneideinrichtung 22 tragenden Teil-Tragplatte 11 ist eine Lage-Sicherung 46 für den Antriebs-Hebel 42 vorgesehen, die den Antriebs-Hebel 42 in der in den Fig. 3 und 5 dargestellten ÖffnungsStellung bzw. Ruhelage der Faden-Schneideinrichtung 22 hält, wenn die Teil-Tragplatte 11 samt Faden-Schneideinrichtung 22 vom x-y-Tisch 10 abgehoben wird. Diese Lage-Sicherung 46 weist eine als Blattfeder ausgebildete Sicherungs-Lasche 47 auf, deren eines Ende in der Nähe des Führungslagers 39 mittels einer Schraube 48 an der Unterseite der Teil-Tragplatte 11, also auf deren dem Linear-Antrieb 36 zugewandten Seite, befestigt ist. Die Lasche 47 erstreckt sich also über den gesamten Betätigungsweg des Antriebsblocks 40 zwischen der ausgezogen dargestellten Öffnungsstellung bzw. Ruhelage der Faden-Schneideinrichtung 22 und der strichpunktiert angedeuteten Stellung des Antriebs-Hebels 42 bei der Schließstellung bzw. Arbeitsstellung der Faden-Schneideinrichtung 22. Der Antriebs-Hebel 42 weist auf seiner der Führungs-Rolle 43 abgewandten, der Teil-Tragplatte 11 zugewandten Seite einen zylindrischen Sicherungs-Zapfen 49 auf. Auf dem Antriebsblock 40 ist ein durch einen Stift mit Halbrundkopf gebildetes Entsicherungsteil 50 angebracht, das bei in den x-y-Tisch 10 eingesetzter Teil-Tragplatte 11 gegen die Sicherungs-Lasche 47 anliegt und diese nach oben in Richtung zur Teil-Tragplatte 11 drückt, wie es in Fig. 5 dargestellt ist. Wenn dagegen bei aus dem x-y-Tisch 10 herausgenommener Trag-Platte 11 das Entsicherungsteil 50 nicht mehr an der Sicherungs-Lasche 47 anliegt, dann ist diese - wie Fig. 6 erkennen lässt - auf Grund ihrer Ausgestaltung als Blattfeder elastisch nach unten ausgelenkt.At the thread-cutting device 22 supporting part support plate 11 is a positional fuse 46 is provided for the drive lever 42, the Drive lever 42 in the illustrated in Figs. 3 and 5 opening position or rest position of the thread cutter 22 holds when the Part support plate 11 together with thread-cutting device 22 from the x-y table 10th is lifted. This position assurance 46 has a leaf spring designed as a Securing tab 47 on, one end of which is close to the guide bearing 39 by means of a screw 48 on the underside of the partial support plate 11, ie on the linear drive 36 side facing, is attached. The tab 47 thus extends over the entire actuation path the drive block 40 between the drawn Opening position or rest position of the thread cutting device 22 and the dash-dotted line indicated position of the drive lever 42 in the Closed position or working position of the thread cutting device 22. Der Drive lever 42 has on its the guide roller 43 facing away, the partial support plate 11 facing side a cylindrical securing pin 49 on. On the drive block 40 is a by a pin with Semicircular head formed release member 50 attached to the in x-y table 10 inserted part support plate 11 against the securing tab 47 rests and this pushes upwards towards the partial support plate 11, as shown in Fig. 5. On the other hand, if from the x-y table 10th removed support plate 11, the release member 50 no longer the fuse tab 47 rests, then this - as Fig. 6 reveals - Due to their design as a leaf spring elastically deflected down.

Die Sicherungs-Lasche 47 weist einen Vorsprung 51 auf, der im Verschiebeweg der Führungsrolle 43 liegt und der eine Sicherungsfläche 52 aufweist, hinter die sich der Sicherungs-Zapfen 49 in der in Fig. 3 ausgezogen dargestellten Ruhelage des Antriebs 48, die also der Öffnungsstellung der Faden-Schneideinrichtung 22 entspricht, legen kann. Wenn - wie bereits erwähnt - die Teil-Tragplatte 11 mit der Faden-Schneideinrichtung 22 vom x-y-Tisch 10 abgehoben wird, dann kommt die Sicherungs-Lasche 47 außer Eingriff mit dem Entsicherungsteil 50, sodass die Sicherungs-Lasche 47 nach unten ausgelenkt wird und der Sicherungs-Zapfen 49 hinter die Sicherungs-Fläche 52 der Sicherungs-Lasche 47 gelangt. Ein unbeabsichtigtes Verschwenken oder bzw. Verstellen des Antriebs-Hebels 42 ist damit bei demontierter Faden-Schneideinrichtung 22 ausgeschlossen. Wenn die Teil-Tragplatte 11 mit der Faden-Schneideinrichtung 22 wieder in den x-y-Tisch 10 eingesetzt wird, wird damit zwangsweise die Führungsrolle 43 in die Führungskulisse 41 des Antriebsblocks 40 eingesetzt; Fehlfunktionen und die daraus resultierenden Beschädigungen der Faden-Schneideinrichtung 22 sind damit ausgeschlossen.The securing tab 47 has a projection 51 in the displacement path the guide roller 43 is located and has a securing surface 52, behind which the securing pin 49 in the pulled out in Fig. 3 illustrated rest position of the drive 48, so the open position of the Thread cutter 22 corresponds, can lay. If - as already mentioned - the part-support plate 11 with the thread-cutting device 22 from x-y table 10 is lifted, then comes the securing tab 47th out of engagement with the release member 50, so that the securing tab 47 is deflected down and the securing pin 49 behind the Backup surface 52 of the fuse tab 47 passes. An unintentional Pivoting or or adjusting the drive lever 42 is so excluded with disassembled thread cutting device 22. If the Part support plate 11 with the thread cutter 22 back into the x-y table 10 is used, thus forcibly becomes the leading role 43 inserted into the guide slot 41 of the drive block 40; malfunction and the resulting damage to the thread cutting device 22 are excluded.

Nach dem Nähen einer Augen-Knopfloch-Naht 53 in dem Nähgutteil 21 verläuft ein Endabschnitt 54 des Greiferfadens 12 von dem Stichloch-Ansatz 9 zur Augen-Knopfloch-Naht 53. Durch die bereits geschilderte Betätigung des Linear-Antriebs 36 wird die Faden-Schneideinrichtung 22 aus ihrer in Fig. 3 geöffnet dargestellten Stellung in ihre in Fig. 7 geschlossen dargestellte Position verbracht, wodurch der Endabschnitt 54 des Greiferfadens 12 unmittelbar benachbart zur Augen-Knopfloch-Naht 53 durchgeschnitten wird. Im Anschluss daran wird die Kolbenstange 38 wieder in den Zylinder 37 eingeführt, wodurch die Faden-Schneideinrichtung 22 geöffnet wird. Aus Gründen der Übersichtlichkeit ist nur das Schneiden des Greiferfadens 12 dargestellt.After sewing an eyelet buttonhole seam 53 in the Nähgutteil 21st extends an end portion 54 of the looper thread 12 from the needle hole approach 9 to the eye-buttonhole seam 53. By the already described Operation of the linear drive 36, the thread cutting device 22nd closed from their in Fig. 3 shown position in their in Fig. 7 shown position, whereby the end portion 54 of the looper thread 12 immediately adjacent to the eye buttonhole seam 53 cut through becomes. Following this, the piston rod 38 is again in introduced the cylinder 37, whereby the thread cutting device 22 is opened becomes. For the sake of clarity, only the cutting of Gripper thread 12 shown.

Claims (10)

Nähmaschine zum Erzeugen einer Naht (53) mit einem Endabschnitt (54) eines Greiferfadens (12), mit einem Arm (1), mit einer mittels einer am Arm (1) gelagerten Armwelle (4) in einer z-Richtung antreibbaren Nadel (5) zur Führung eines Nadelfadens (6), mit einer Grundplatte (2), mit einem auf der Grundplatte (2) in einer x-Richtung und einer y-Richtung verschiebbaren x-y-Tisch (10), mit einer auf dem x-y-Tisch (10) angeordneten Nähgut-Klammer (13), mit einem an der Grundplatte (2) angeordneten, drehantreibbaren Greiferlager (7) mit einem unterhalb der Nadel (5) angeordneten Stichloch-Ansatz (9) zur Zuführung des Greiferfadens (12), mit einer am x-y-Tisch (10) angeordneten, nach Art einer Schere ausgebildeten Faden-Schneideinrichtung (22), die ein erstes Scherenteil (23) mit einer ersten Schneide (26) und ein zweites Scherenteil (24) mit einer zweiten Schneide (27) aufweist, die gegeneinander verschwenkbar zum Schließen und Öffnen der Schneiden (26, 27) gelagert sind, mit einem Antrieb (36) zur Verschwenkung des ersten und zweiten Scherenteils (23, 24) gegeneinander zur Ausführung einer Schneidbewegung der ersten und zweiten Schneide (26, 27) unter Schließen der Schneiden (26, 27), dadurch gekennzeichnet, dass zwischen dem Antrieb (36) und dem ersten Scherenteil (23) und dem zweiten Scherenteil (24) eine Zwangskopplung derart vorgesehen ist, dass auch das Öffnen der Schneiden (26, 27) durch den Antrieb (36) erfolgt.Sewing machine for producing a seam (53) having an end portion (54) of a rapier thread (12), with one arm (1), with a needle (5) which can be driven in a z-direction by means of an arm shaft (4) mounted on the arm (1) for guiding a needle thread (6), with a base plate (2), with an xy-table (10) which can be displaced in an x-direction and a y-direction on the base plate (2), with a material clip (13) arranged on the xy table (10), with a rotatably drivable gripper bearing (7) arranged on the base plate (2) with a needle hole attachment (9) arranged below the needle (5) for feeding the rapier thread (12), with a on the xy table (10) arranged, designed in the manner of a pair of scissors thread cutting device (22), the a first shearing part (23) with a first cutting edge (26) and a second shearing part (24) having a second cutting edge (27), which are mounted pivotably relative to each other for closing and opening the cutting edges (26, 27), a drive (36) for pivoting the first and second scissors members (23, 24) towards each other to perform a cutting movement of the first and second blades (26, 27) while closing the blades (26, 27), characterized in that a positive coupling is provided between the drive (36) and the first shearing part (23) and the second shearing part (24) such that the opening of the cutting edges (26, 27) by the drive (36). Nähmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Scherenteile (23, 24) mittels eines schwenkbar gelagerten Betätigungs-Hebels (32) miteinander gekoppelt sind, der mit dem Antrieb (36) schwenkantreibbar verbunden ist.Sewing machine according to claim 1, characterized in that the scissors parts (23, 24) by means of a pivotally mounted actuating lever (32) are coupled together, which is pivotally connected to the drive (36). Nähmaschine nach Anspruch 2, dadurch gekennzeichnet, dass der Betätigungs-Hebel (32) doppelarmig ausgebildet ist und mit seinen Enden formschlüssig in einander zugewandte Ausnehmungen (30, 31) der Scherenteile (23, 24) formschlüssig eingreift.Sewing machine according to claim 2, characterized in that the actuating lever (32) is formed with two arms and positively engages with its ends in mutually facing recesses (30, 31) of the scissors parts (23, 24). Nähmaschine nach Anspruch 2 oder 3, dadurch gekennzeichnet, dass der Antrieb als Linear-Antrieb (36) ausgebildet ist, der mittels eines Antriebs-Hebels (42) mit dem Betätigungs-Hebel (32) gekoppelt ist.Sewing machine according to claim 2 or 3, characterized in that the drive is designed as a linear drive (36) which is coupled by means of a drive lever (42) with the actuating lever (32). Nähmaschine nach Anspruch 4, dadurch gekennzeichnet, dass der Linear-Antrieb (36) mit einem verschiebbaren Antriebsblock (40) versehen ist, der eine Führung für den Antriebs-Hebel (42) aufweist.Sewing machine according to claim 4, characterized in that the linear drive (36) is provided with a displaceable drive block (40) having a guide for the drive lever (42). Nähmaschine nach Anspruch 4 oder 5, dadurch gekennzeichnet, dass der Antriebs-Hebel (42) lösbar mit dem Linear-Antrieb (36) gekoppelt ist. Sewing machine according to claim 4 or 5, characterized in that the drive lever (42) is releasably coupled to the linear drive (36). Nähmaschine nach einem der Ansprüche 4 bis 6, dadurch gekennzeichnet, dass eine Lage-Sicherung (46) für den Antriebs-Hebel (42) bei vom Antrieb (36) entkoppeltem Antriebs-Hebel (42) vorgesehen ist.Sewing machine according to one of claims 4 to 6, characterized in that a position assurance (46) for the drive lever (42) is provided by the drive (36) decoupled drive lever (42). Nähmaschine nach Anspruch 7, dadurch gekennzeichnet, dass die Lage-Sicherung (46) eine Sicherungs-Lasche (47) aufweist, die den Antriebs-Hebel (42) in vom Antrieb (36) entkoppeltem Zustand in einer Endlage blockiert.Sewing machine according to claim 7, characterized in that the position assurance (46) has a securing lug (47) which blocks the drive lever (42) in a final position from the drive (36) decoupled state. Nähmaschine nach Anspruch 8, dadurch gekennzeichnet, dass der Antrieb (36) ein Entsicherungsteil (50) aufweist, das die Sicherungs-Lasche (47) bei mit dem Antrieb (36) gekoppeltem Antriebs-Hebel (42) außer Eingriff mit dem Antriebs-Hebel (42) bringt.Sewing machine according to claim 8, characterized in that the drive (36) has a release part (50), the locking tab (47) with the drive (36) coupled to the drive lever (42) out of engagement with the drive lever (42) brings. Nähmaschine nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Nähmaschine als Augenknopfloch-Nähmaschine ausgebildet ist.Sewing machine according to one of claims 1 to 9, characterized in that the sewing machine is designed as a buttonhole eyelet sewing machine.
EP05006698A 2004-04-01 2005-03-26 Sewing machine Active EP1582615B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004016836A DE102004016836B3 (en) 2004-04-01 2004-04-01 Sewing machine, to stitch a seam with an end section of the looper thread, has a thread cutter with a positive link from the linear drive to open and close the cutting shears wholly by the drive
DE102004016836 2004-04-01

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EP1582615A2 true EP1582615A2 (en) 2005-10-05
EP1582615A3 EP1582615A3 (en) 2006-09-27
EP1582615B1 EP1582615B1 (en) 2011-08-31

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KR (1) KR101165461B1 (en)
CN (1) CN1676722B (en)
AT (1) ATE522649T1 (en)
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PATENT ABSTRACTS OF JAPAN Bd. 1996, Nr. 04, 30. April 1996 (1996-04-30) -& JP 07 323173 A (BROTHER IND LTD), 12. Dezember 1995 (1995-12-12) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101058926B (en) * 2006-04-21 2012-08-08 杜尔克普-阿德勒股份公司 Winding blade used for sewing machine

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DE102004016836B3 (en) 2005-05-25
TWI375738B (en) 2012-11-01
EP1582615A3 (en) 2006-09-27
ATE522649T1 (en) 2011-09-15
CN1676722B (en) 2011-07-13
CN1676722A (en) 2005-10-05
JP4734010B2 (en) 2011-07-27
EP1582615B1 (en) 2011-08-31
TW200533802A (en) 2005-10-16
KR101165461B1 (en) 2012-07-12
KR20060044975A (en) 2006-05-16

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