EP1371769A2 - Buttonhole sewing machine - Google Patents

Buttonhole sewing machine Download PDF

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Publication number
EP1371769A2
EP1371769A2 EP03010636A EP03010636A EP1371769A2 EP 1371769 A2 EP1371769 A2 EP 1371769A2 EP 03010636 A EP03010636 A EP 03010636A EP 03010636 A EP03010636 A EP 03010636A EP 1371769 A2 EP1371769 A2 EP 1371769A2
Authority
EP
European Patent Office
Prior art keywords
cutting
sewing machine
knife
drive
buttonhole sewing
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
EP03010636A
Other languages
German (de)
French (fr)
Other versions
EP1371769B1 (en
EP1371769A3 (en
Inventor
Karsten Filges
Theodor Janocha
Jochen Fischer
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 EP1371769A2 publication Critical patent/EP1371769A2/en
Publication of EP1371769A3 publication Critical patent/EP1371769A3/en
Application granted granted Critical
Publication of EP1371769B1 publication Critical patent/EP1371769B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • 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
    • D05B37/00—Devices incorporated in sewing machines for slitting, grooving, or cutting
    • D05B37/04—Cutting devices
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05D—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2203/00—Selection of machines, accessories or parts of the same kind
    • 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 buttonhole sewing machine according to the preamble of claim 1.
  • Such a buttonhole sewing machine is known from DE 199 16 660 C1 US 6,220,192 A) known.
  • a knife fixed, but replaceable, attached.
  • a rotatable carrier which can be driven up and down several cutting blocks attached, one around a y-direction Axis can optionally be brought into a position in which a Cutting block interacts with the knife.
  • the construction effort for the swivel drive of the cutting blocks and for the adjustment of the carrier is large in a given position of a cutting block.
  • the invention is therefore based on the object of a buttonhole sewing machine of the generic type so that the constructive Effort for the cutting device is as low as possible.
  • the cutting blocks are made by a linear movement, which can be extremely short, that is only over the Width of a cutting block, optionally brought into one position, in which it engages with the knife, which can only be moved in a straight line come.
  • the anvil is attached to the base plate and has only one carrier movable in one direction, namely the x direction, while the knife is only performing a vertical linear movement.
  • a buttonhole sewing machine is C-shaped, d. H. it has an upper arm 1, a lower, housing-like Base plate 2 and a connecting both, approximately vertical Stand 3 on.
  • An arm shaft 4 is mounted in the arm 1 in the usual way, which can be driven by a drive motor 5 only indicated in FIG. 7. From the arm shaft 4, the drive is a vertical one in the usual way Slidable needle bar 6 with a needle 7 and a swing drive derived for this.
  • An x-y table 8 is arranged on the base plate 2, which means that it is by one in two horizontal coordinate directions, namely the x-direction and the y-direction, movable cross slide.
  • the x-y table 8 is designed in the usual way, for example is known from DE 198 07 771 A1 (corresponding to US Pat. No. 6,095,066).
  • the x-y table 8 is driven by means of only indicated in FIG Drives, namely an x drive 9 and a y drive 10, in which it is positionable electric motors, so usually preferred Stepper motors, but also adjustable DC motors.
  • a two-part support plate 11a, 11b is arranged on the x-y table 8.
  • One of the two partial support plates 11a or 11b can be placed on the x-y table 8 be supported displaceably in the x direction, while the other partial support plate 11b or 11a immovable, that is to say fixedly arranged on the x-y table 8 is what is not shown in detail.
  • each partial support plate 11a or 11b is a sewing material clamp 12a or 12b attached, each one on the respective partial support plate 11a or 11b attached partial platen 13a or 13b, which one clamping plate 14a or 14b is assigned.
  • the clamping plates 14a, 14b are attached to double-arm bearing levers 15a, 15b.
  • a buttonhole cutting device 16 which essentially consists of an upper drivable cutting part 17 and a lower anvil 18.
  • the upper cutting part 17 has a cutting drive 19 to be described in more detail below, one end of which is fastened in the base plate 2 by means of a joint 20.
  • the other upper end of the drive 19 is connected to a two-armed lever 21 by means of a joint 22, which in turn is articulated by means of a further joint 21a on a drive rod 23 which is guided in a vertically displaceable manner in at least one guide bearing 24 arranged on the arm 1.
  • a knife head 25 is attached, on the underside of which a knife 26 shown in FIG. 3 is replaceably attached.
  • the knife 26 has a rectilinear cutting part 27 and an eye cutting part 28.
  • the straight cutting part 27 has a length L 27
  • the entire knife 26, consisting of the straight cutting part 27 and the eye cutting part 28 has a length L 26 .
  • the anvil 18 has a base body 29 which is in the base plate 2 is firmly arranged.
  • a carrier 30 is arranged on the base body 29, which can be moved in the x direction. It is by means of strips 31, 32 on the Main body 29 held, the strips 31, 32 by means of screws 33 are attached to the base body 29.
  • an adjustment drive 34 integrated, which is a two-sided, pneumatic acted upon piston-cylinder drive.
  • Its cylinder 35 is through a bore running in the x direction in the base body 29 formed, which is closed at its ends by means of covers 36.
  • a piston 37 is slidably disposed on the end faces thereof each a line 38, 39 opens into the cylinder 35, each for Compressed air supply and for ventilation.
  • the carrier 30 is by means of of a pin 31a connected to the piston 37, so it is depending on the action of the piston 37 with compressed air via line 38 or 39 from Piston 37 moved in the x direction.
  • the two shifting movements are limited by adjustable end stops 40, 41, which by Base body 29 arranged screws are formed.
  • a first cutting block 42 and a second are on the carrier 30 Cutting block 43 fastened by means of screws 44, that is to say exchangeably. How results from the overall view of Fig. 3 and Fig. 6, comes when the first cutting block 42 is located below the knife 26, that is cooperates with this, the entire knife 26, so the straight line Cutting part 27 and the eye cutting part 28 with the cutting block 42 engaged. If, on the other hand, the second cutting block 43 is below the Knife 26 is located, then only the straight cutting part 27 comes along this engages; the eye cutting part 28 does not cut.
  • the second Cutting block 43 points in that associated with the eye cutting part Area a recess 43a.
  • the sewing machine is provided with a control unit 46, via which the x drive 9, the y drive 10, the multi-way valve 45 for the adjusting drive 34, the drive motor 5 of the arm shaft 4, not shown Clamp drives for the sewing material clamps 12a, 12b and the cutting drive 19 can be controlled.
  • the control unit 46 has a memory part 47 on. Furthermore, it is an operating unit 48 with an input keyboard 49 and a display 50.
  • FIGS. 8 and 9 The method of operation results from FIGS. 8 and 9.
  • the sewing material part 52 is transported into the cutting device 16 in the y direction by means of the xy table 8.
  • the first cutting block 42 is located under the knife 26.
  • the cutting drive 19 is actuated.
  • the entire knife 26 comes into cutting action with the first cutting block 42 forming a counter surface, so that the straight cutting part 27 and the eye cutting part 28 cut an eye buttonhole 53 with the length L 26 .
  • FIGS. 10 and 11 An alternative results from FIGS. 10 and 11.
  • the Cutting blocks 42 ', 43' are designed so that the first cutting block 42 'only with the straight cutting part 27 and the eye cutting part 28 comes into cutting connection while the second cutting block 43 'is designed such that it only has the rectilinear cutting part 27 and the eye cutting part 28 'comes into cutting connection.
  • This Design thus enables the generation of different in their position Eyelet buttonholes.
  • the cutting drive 19 in the embodiment according to FIG. 12 is in the Essentially formed by a multi-chamber cylinder 56, which by means of of the joint 20 is fixed in the base plate 2. There is a piston rod in it 57 arranged, the outer end of the hinge 22 with the Lever 21 is connected. There are a total of four chambers 58 in cylinder 56 to 61 separated by partitions 62, 63, 64, each sealed are penetrated by the piston rod 57. Chambers 58 to 61 are - in relation to the length of the cylinder 56 - one behind the other arranged. A piston 65, 66, 67, 68 is arranged in each chamber is firmly connected to the piston rod 57 and opposite the cylinder 56 is sealed.
  • the piston 65 in the first chamber 58 is designed to be acted upon from two sides, namely via lines 69, 70, i.e. this is the piston rod depending on the loading in extension direction 71 or in extension direction 72 acted upon.
  • the three further chambers 59, 60, 61 are by means of a common line 73 can only be acted upon in such a way that a Force in extension direction 71 is exerted.
  • the three lines 69, 70, 73 can be acted upon by three multi-way valves 74, 75, 76, which by the control unit 46 can be controlled by means of the control unit 48.
  • the cutting drive 19 ' is a double-acting pneumatically actuated piston-cylinder drive 77 provided, the cylinder 78 on the one hand and the piston rod 79 on the other hand, are integrated into a toggle mechanism 80.
  • This Toggle mechanism 80 is on the one hand by means of the joint 22 with the Swivel lever 21 connected and on the other hand by means of the joint 20 supported a force limiter 81.
  • the cylinder 78 is via a multi-way valve 82 and two lines 83, 84 connected on both sides of the Open piston 85 of drive 77 in cylinder 78.
  • a limitation on the pivot lever 21 and thus the knife 26 or 26 'exerted force is caused by the force limiter 81.
  • This has a four-day abutment 86, which is fixed by means of a stationary Part 87 stationary, d. H. immovable, supported in the base plate 2.
  • the stationary part 87 of the abutment 86 carries a flexible part 88, on which the toggle mechanism 80 is supported by means of the joint 20.
  • the stationary part 87 is constructed like a frame and points one above the other four pneumatically actuated membrane cylinders 90, 91, 92, 93 as passive linear drives.
  • the compliant part 88 of the abutment 86 also has intermediate shelves 94 one above the other, wherein each an intermediate floor 94 is arranged above an intermediate floor 89.
  • the membrane cylinders 90 to 93 are each on an intermediate floor 89 and arranged below an intermediate floor 94.
  • everyone Membrane cylinder 90 to 93 points below its membrane 95, ie in its interior, an inner stop 96.
  • On the membrane 95 is an outer stop 97 is attached. The respective outer stop 97 can therefore be moved vertically by means of the respective membrane 95 become.
  • each membrane cylinder only has a small stroke of, for example, one to can run two millimeters.
  • the membrane cylinders 91, 92, 93 are connected via lines 98, 99, 100 Multi-way valves 101, 102, 103 acted on with compressed air.
  • the membrane cylinder 90 is connected to line 83 which drives drive 77 applied.
  • the size of the forces exerted can be predetermined by a pressure regulator 104 be controlled, which is also controlled via the control unit 48.
  • a similar pressure regulator can of course also be used in the exemplary embodiment 12 are provided.
  • the purpose of the force gradation is to adapt the cutting device 16 to different cutting conditions caused by the Hardness of the sewing material, the type of sewing material, the number of items to be cut Layers of material, but also by the shape and / or size of the material to be carried out Cut can be influenced.
  • the cutting force is flexible and adaptable to the cutting conditions Cutting device 16 created in the knife 26, 26 'and Anvil 18 protected against unnecessary wear due to excessive cutting forces are, which significantly increases operational readiness.

Abstract

Cutting blocks (42, 43) are attached to the anvil (18) fixed to the machine. They are adjustable along the x-direction. The blade descends towards the anvil.

Description

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

Eine derartige Knopfloch-Nähmaschine ist aus der DE 199 16 660 C1 (entsprechend US 6,220,192 A) bekannt. Hierbei ist an der Grundplatte der Nähmaschine ein Messer ortsfest, aber auswechselbar, angebracht. Oberhalb des Messers sind an einem auf und ab antreibbaren, drehbaren Träger mehrere Schneidblöcke angebracht, die um eine in y-Richtung verlaufende Achse wahlweise in eine Stellung gebracht werden können, in der ein Schneidblock mit dem Messer zusammenwirkt. Der konstruktive Aufwand für den Schwenkantrieb der Schneidblöcke und für die Justierung des Trägers in einer vorgegebenen Position eines Schneidblockes ist groß.Such a buttonhole sewing machine is known from DE 199 16 660 C1 US 6,220,192 A) known. Here is the on the base plate Sewing machine a knife fixed, but replaceable, attached. Above of the knife are on a rotatable carrier which can be driven up and down several cutting blocks attached, one around a y-direction Axis can optionally be brought into a position in which a Cutting block interacts with the knife. The construction effort for the swivel drive of the cutting blocks and for the adjustment of the carrier is large in a given position of a cutting block.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Knopfloch-Nähmaschine der gattungsgemäßen Art so auszugestalten, dass der konstruktive Aufwand für die Schneid-Vorrichtung möglichst gering ist.The invention is therefore based on the object of a buttonhole sewing machine of the generic type so that the constructive Effort for the cutting device is as low as possible.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale im Kennzeichnungsteil des Anspruches 1 gelöst. Die Schneid-Blöcke werden durch eine lineare Bewegung, die extrem kurz sein kann, die sich also nur über die Breite eines Schneidblocks erstreckt, wahlweise in eine Position gebracht, in der sie mit dem lediglich geradlinig bewegbaren Messer in Eingriff kommen. Der Amboss ist an der Grundplatte angebracht und weist nur einen in einer Richtung, nämlich der x-Richtung, bewegbaren Träger auf, während das Messer nur eine vertikale lineare Bewegung ausführt. This object is achieved by the features in the labeling part of claim 1 solved. The cutting blocks are made by a linear movement, which can be extremely short, that is only over the Width of a cutting block, optionally brought into one position, in which it engages with the knife, which can only be moved in a straight line come. The anvil is attached to the base plate and has only one carrier movable in one direction, namely the x direction, while the knife is only performing a vertical linear movement.

Die Unteransprüche geben vorteilhafte Weiterbildungen wieder.The sub-claims reflect advantageous further developments.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnung näher erläutert. Es zeigt

Fig. 1
eine Knopfloch-Nähmaschine in Seitenansicht,
Fig. 2
einen horizontalen Teil-Schnitt durch die Nähmaschine entsprechend der Schnittlinie II-II in Fig. 1 in gegenüber Fig. 1 vergrößertem Maßstab,
Fig. 3
eine Ansicht auf ein Messer entsprechend dem Sichtpfeil III in Fig. 1,
Fig. 4
einen Amboss in Seitenansicht in gegenüber Fig. 1 vergrößerter Darstellung,
Fig. 5
einen vertikalen Querschnitt durch den Amboss entsprechend der Schnittlinie V-V in Fig. 4,
Fig. 6
eine Draufsicht auf den Amboss entsprechend dem Sichtpfeil VI in Fig. 5,
Fig. 7
einen perspektivisch dargestellten Teil der Knopfloch-Nähmaschine einschließlich der schaltungsmäßigen Verknüpfung der verschiedenen Antriebe mit einer Steuereinheit und einer BedienEinheit,
Fig. 8
eine Draufsicht auf ein in einer Nähgutklammer gehaltenes Nähgutteil mit einem Augen-Knopfloch,
Fig. 9
eine Draufsicht auf ein in einer Nähgutklammer gehaltenes Nähgutteil mit einem einfachen Knopfloch,
Fig. 10
eine Draufsicht auf eine abgewandelte Ausführungsform eines Messers in einer Darstellung entsprechend Fig. 3,
Fig.11
eine Draufsicht auf einen dem Messer nach Fig. 10 angepassten Amboss in einer Darstellung gemäß Fig. 6,
Fig. 12
eine schematische Darstellung eines Schneid-Antriebs für die Knopfloch-Schneid-Vorrichtung einschließlich der schaltungsmäßigen Verknüpfung mit der Steuer-Einheit und
Fig. 13
eine schematische Darstellung einer weiteren Ausführungsform des Schneid-Antriebs der Knopfloch-Schneid-Vorrichtung einschließlich der schaltungsmäßigen Verknüpfung mit der SteuerEinheit.
An embodiment of the invention is explained below with reference to the drawing. It shows
Fig. 1
a buttonhole sewing machine in side view,
Fig. 2
2 shows a horizontal partial section through the sewing machine according to section line II-II in FIG. 1 on an enlarged scale compared to FIG. 1,
Fig. 3
2 shows a view of a knife according to the arrow III in FIG. 1,
Fig. 4
2 shows an anvil in side view in an enlarged view compared to FIG. 1,
Fig. 5
4 shows a vertical cross section through the anvil along the section line VV in FIG. 4,
Fig. 6
3 shows a plan view of the anvil in accordance with the arrow VI in FIG. 5,
Fig. 7
a perspective view of the part of the buttonhole sewing machine including the circuit-like connection of the different drives with a control unit and an operating unit,
Fig. 8
1 shows a plan view of a workpiece with an eye buttonhole held in a workpiece clamp,
Fig. 9
1 shows a plan view of a workpiece with a simple buttonhole held in a workpiece clamp,
Fig. 10
3 shows a plan view of a modified embodiment of a knife in a representation corresponding to FIG. 3,
Figure 11
10 shows a plan view of an anvil adapted to the knife according to FIG. 10 in a representation according to FIG. 6,
Fig. 12
a schematic representation of a cutting drive for the buttonhole cutting device including the circuitry link to the control unit and
Fig. 13
a schematic representation of a further embodiment of the cutting drive of the buttonhole cutting device including the circuit-like linkage with the control unit.

Wie Fig. 1 entnehmbar ist, ist eine 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 nur in Fig. 7 angedeuteten Antriebsmotor 5 antreibbar ist. Von der Armwelle 4 werden in üblicher Weise der Antrieb einer vertikal verschiebbaren Nadelstange 6 mit einer Nadel 7 und ein Schwingantrieb hierfür abgeleitet. 1 can be seen, a buttonhole sewing machine is C-shaped, d. H. it has an upper arm 1, a lower, housing-like Base plate 2 and a connecting both, approximately vertical Stand 3 on. An arm shaft 4 is mounted in the arm 1 in the usual way, which can be driven by a drive motor 5 only indicated in FIG. 7. From the arm shaft 4, the drive is a vertical one in the usual way Slidable needle bar 6 with a needle 7 and a swing drive derived for this.

Auf der Grundplatte 2 ist ein x-y-Tisch 8 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 8 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 8 erfolgt mittels nur in Fig. 7 angedeuteter Antriebe, nämlich eines x-Antriebes 9 und eines y-Antriebes 10, bei denen es sich um positionierbare Elektromotoren, in der Regel also bevorzugt Schrittmotoren, aber auch regelbare Gleichstrommotoren handelt.An x-y table 8 is arranged on the base plate 2, which means that it is by one in two horizontal coordinate directions, namely the x-direction and the y-direction, movable cross slide. The x-y table 8 is designed in the usual way, for example is known from DE 198 07 771 A1 (corresponding to US Pat. No. 6,095,066). The x-y table 8 is driven by means of only indicated in FIG Drives, namely an x drive 9 and a y drive 10, in which it is positionable electric motors, so usually preferred Stepper motors, but also adjustable DC motors.

Auf dem x-y-Tisch 8 ist eine zweiteilige Stützplatte 11a, 11b angeordnet. Eine der beiden Teil-Stützplatten 11a oder 11b kann auf dem x-y-Tisch 8 in x-Richtung verschiebbar abgestützt sein, während die andere Teil-Stützplatte 11b oder 11a unverschiebbar, also fest auf dem x-y-Tisch 8 angeordnet ist, was im Einzelnen nicht dargestellt ist.A two-part support plate 11a, 11b is arranged on the x-y table 8. One of the two partial support plates 11a or 11b can be placed on the x-y table 8 be supported displaceably in the x direction, while the other partial support plate 11b or 11a immovable, that is to say fixedly arranged on the x-y table 8 is what is not shown in detail.

Auf jeder Teil-Stützplatte 11a bzw. 11b ist eine Nähgutklammer 12a bzw. 12b angebracht, die jeweils eine auf der jeweiligen Teil-Stützplatte 11a bzw. 11b angebrachte Teil-Auflageplatte 13a bzw. 13b aufweist, denen jeweils eine Klemmplatte 14a bzw. 14b zugeordnet ist. Die Klemmplatten 14a, 14b sind an doppelarmigen Lagerhebeln 15a, 15b angebracht.On each partial support plate 11a or 11b is a sewing material clamp 12a or 12b attached, each one on the respective partial support plate 11a or 11b attached partial platen 13a or 13b, which one clamping plate 14a or 14b is assigned. The clamping plates 14a, 14b are attached to double-arm bearing levers 15a, 15b.

Einzelheiten des Aufbaus und des Antriebs der Nähgutklammern 12a, 12b ergeben sich aus der DE 102 16 809 A, auf die insoweit verwiesen wird.Details of the construction and the drive of the material clamps 12a, 12b result from DE 102 16 809 A, to which reference is made in this regard.

In y-Richtung gesehen hinter der Nadelstange 6 befindet sich eine Knopfloch-Schneid-Vorrichtung 16, die im Wesentlichen aus einem oberen antreibbaren Schneid-Teil 17 und einem unteren Amboss 18 besteht. Der obere Schneid-Teil 17 weist einen weiter unten noch genauer zu schildernden Schneid-Antrieb 19 auf, dessen eines Ende in der Grundplatte 2 mittels eines Gelenks 20 befestigt ist. Das andere obere Ende des Antriebs 19 ist mit einem zweiarmigen Hebel 21 mittels eines Gelenks 22 verbunden, der wiederum mittels eines weiteren Gelenks 21a an einer Antriebs-Stange 23 angelenkt ist, die in mindestens einem am Arm 1 angeordneten FührungsLager 24 vertikal verschiebbar geführt ist. Am unteren Ende der Antriebs-Stange 23 ist ein Messer-Kopf 25 angebracht, an dessen Unterseite ein in Fig. 3 dargestelltes Messer 26 auswechselbar angebracht ist. Wie Fig. 3 entnehmbar ist, weist das Messer 26 einen geradlinigen Schneidenteil 27 und einen Augen-Schneidenteil 28 auf. Der geradlinige Schneidenteil 27 weist eine Länge L27 auf, während das gesamte Messer 26, bestehend aus dem geradlinigen Schneidenteil 27 und dem Augen-Schneidenteil 28 eine Länge L26 aufweist.Viewed in the y direction, behind the needle bar 6 there is a buttonhole cutting device 16, which essentially consists of an upper drivable cutting part 17 and a lower anvil 18. The upper cutting part 17 has a cutting drive 19 to be described in more detail below, one end of which is fastened in the base plate 2 by means of a joint 20. The other upper end of the drive 19 is connected to a two-armed lever 21 by means of a joint 22, which in turn is articulated by means of a further joint 21a on a drive rod 23 which is guided in a vertically displaceable manner in at least one guide bearing 24 arranged on the arm 1. At the lower end of the drive rod 23, a knife head 25 is attached, on the underside of which a knife 26 shown in FIG. 3 is replaceably attached. As can be seen in FIG. 3, the knife 26 has a rectilinear cutting part 27 and an eye cutting part 28. The straight cutting part 27 has a length L 27 , while the entire knife 26, consisting of the straight cutting part 27 and the eye cutting part 28, has a length L 26 .

Der Amboss 18 weist einen Grundkörper 29 auf, der in der Grundplatte 2 fest angeordnet ist. Auf dem Grundkörper 29 ist ein Träger 30 angeordnet, der in x-Richtung verschiebbar ist. Er ist mittels Leisten 31, 32 auf dem Grundkörper 29 gehalten, wobei die Leisten 31, 32 mittels Schrauben 33 am Grundkörper 29 befestigt sind. Im Grundkörper 29 ist ein Verstell-Antrieb 34 integriert, bei dem es sich um einen zweiseitig, pneumatisch beaufschlagbaren Kolben-Zylinder-Antrieb handelt. Dessen Zylinder 35 wird durch eine in x-Richtung verlaufende Bohrung im Grundkörper 29 gebildet, die an ihren Enden mittels Deckeln 36 verschlossen ist. Im Zylinder 35 ist ein Kolben 37 verschiebbar angeordnet, an dessen Stirnseiten jeweils eine Leitung 38, 39 in den Zylinder 35 einmündet, die jeweils zur Druckluftzuführung und zur Entlüftung dient. Der Träger 30 ist mittels eines Bolzens 31a mit dem Kolben 37 verbunden, wird also je nach Beaufschlagung des Kolbens 37 mit Druckluft über die Leitung 38 oder 39 vom Kolben 37 in x-Richtung verschoben. Die beiden Verschiebebewegungen werden durch einstellbare End-Anschläge 40, 41 begrenzt, die durch im Grundkörper 29 angeordnete Stellschrauben gebildet sind.The anvil 18 has a base body 29 which is in the base plate 2 is firmly arranged. A carrier 30 is arranged on the base body 29, which can be moved in the x direction. It is by means of strips 31, 32 on the Main body 29 held, the strips 31, 32 by means of screws 33 are attached to the base body 29. In the base body 29 there is an adjustment drive 34 integrated, which is a two-sided, pneumatic acted upon piston-cylinder drive. Its cylinder 35 is through a bore running in the x direction in the base body 29 formed, which is closed at its ends by means of covers 36. In the cylinder 35, a piston 37 is slidably disposed on the end faces thereof each a line 38, 39 opens into the cylinder 35, each for Compressed air supply and for ventilation. The carrier 30 is by means of of a pin 31a connected to the piston 37, so it is depending on the action of the piston 37 with compressed air via line 38 or 39 from Piston 37 moved in the x direction. The two shifting movements are limited by adjustable end stops 40, 41, which by Base body 29 arranged screws are formed.

Auf dem Träger 30 sind ein erster Schneid-Block 42 und ein zweiter Schneid-Block 43 mittels Schrauben 44, also auswechselbar, befestigt. Wie sich aus der Gesamtschau von Fig. 3 und Fig. 6 ergibt, kommt dann, wenn der erste Schneid-Block 42 sich unterhalb des Messers 26 befindet, also mit diesem zusammenwirkt, das gesamte Messer 26, also der geradlinige Schneidenteil 27 und der Augen-Schneidenteil 28 mit dem Schneid-Block 42 in Eingriff. Wenn sich dagegen der zweite Schneid-Block 43 unter dem Messer 26 befindet, dann kommt nur der geradlinige Schneidenteil 27 mit diesem in Eingriff; der Augen-Schneidenteil 28 schneidet nicht. Der zweite Schneidblock 43 weist in dem dem Augen-Schneidenteil zugeordneten Bereich eine Ausnehmung 43a auf.A first cutting block 42 and a second are on the carrier 30 Cutting block 43 fastened by means of screws 44, that is to say exchangeably. How results from the overall view of Fig. 3 and Fig. 6, comes when the first cutting block 42 is located below the knife 26, that is cooperates with this, the entire knife 26, so the straight line Cutting part 27 and the eye cutting part 28 with the cutting block 42 engaged. If, on the other hand, the second cutting block 43 is below the Knife 26 is located, then only the straight cutting part 27 comes along this engages; the eye cutting part 28 does not cut. The second Cutting block 43 points in that associated with the eye cutting part Area a recess 43a.

Die Beaufschlagung des Verstell-Antriebs 34 und damit die Verschiebung des Trägers 30 in eine der beiden Endlagen, in denen sich entweder der erste Schneid-Block 42 unter dem Messer 26 oder der zweite Schneid-Block 43 unter dem Messer 26 befindet, erfolgt von einer nicht dargestellten Druckluft-Quelle über ein elektromagnetisch betätigbares Mehrwege-Ventil 45.The application of the adjustment drive 34 and thus the displacement of the carrier 30 in one of the two end positions, in which either first cutting block 42 under knife 26 or the second cutting block 43 is located under the knife 26, done by a not shown Compressed air source via an electromagnetically actuated multi-way valve 45th

Die Nähmaschine ist mit einer Steuer-Einheit 46 versehen, über die der x-Antrieb 9, der y-Antrieb 10, das Mehrwege-Ventil 45 für den Verstell-Antrieb 34, der Antriebsmotor 5 der Armwelle 4, nicht dargestellte Klemm-Antriebe für die Nähgutklammern 12a, 12b und der Schneid-Antrieb 19 angesteuert werden. Die Steuer-Einheit 46 weist einen Speicherteil 47 auf. Weiterhin ist die eine Bedien-Einheit 48 mit einer EingabeTastatur 49 und einer Anzeige 50 versehen.The sewing machine is provided with a control unit 46, via which the x drive 9, the y drive 10, the multi-way valve 45 for the adjusting drive 34, the drive motor 5 of the arm shaft 4, not shown Clamp drives for the sewing material clamps 12a, 12b and the cutting drive 19 can be controlled. The control unit 46 has a memory part 47 on. Furthermore, it is an operating unit 48 with an input keyboard 49 and a display 50.

Die Arbeitsweise ergibt sich aus den Figuren 8 und 9. Nach dem Nähen einer Augen-Knopfloch-Naht 51 in einem Nähgutteil 52 wird das Nähgutteil 52 mittels des x-y-Tisches 8 in y-Richtung in die Schneid-Vorrichtung 16 transportiert. Der erste Schneid-Block 42 befindet sich unter dem Messer 26. Der Schneid-Antrieb 19 wird betätigt. Das gesamte Messer 26 kommt mit dem eine Gegenfläche bildenden ersten Schneid-Block 42 in Schneid-Wirkung, so dass der geradlinige Schneidenteil 27 und der Augen-Schneidenteil 28 ein Augen-Knopfloch 53 mit der Länge L26 schneiden.The method of operation results from FIGS. 8 and 9. After sewing an eye buttonhole seam 51 in a sewing material part 52, the sewing material part 52 is transported into the cutting device 16 in the y direction by means of the xy table 8. The first cutting block 42 is located under the knife 26. The cutting drive 19 is actuated. The entire knife 26 comes into cutting action with the first cutting block 42 forming a counter surface, so that the straight cutting part 27 and the eye cutting part 28 cut an eye buttonhole 53 with the length L 26 .

Wenn dagegen gemäß Fig. 9 ein einfaches Knopfloch, also ein ohne ein Auge und mit beliebigen Endriegeln ausgebildetes Knopfloch, ein sogenanntes Wäsche-Knopfloch, genäht worden ist, dann wird durch entsprechende Beaufschlagung des Verstell-Antriebs 34 der zweite Schneid-Block 43 unter das Messer 26 gebracht. Das Nähgutteil 52 mit der Knopfloch-Naht 54 wird über den zweiten Schneid-Block 43 verfahren. Durch Betätigung des Schneid-Antriebs 19 kommt lediglich der geradlinige Schneidenteil 27 des Messers 26 mit dem Schneid-Block 43 in Schneid-Kontakt. Es wird lediglich ein geradliniges Knopfloch 55 mit der Länge L27 geschnitten.9, on the other hand, if a simple buttonhole, that is to say a buttonhole designed without an eye and with any end bars, a so-called laundry buttonhole, has been sewn, then by appropriately acting on the adjustment drive 34, the second cutting block 43 is underneath it Brought knife 26. The sewing material part 52 with the buttonhole seam 54 is moved over the second cutting block 43. By actuating the cutting drive 19, only the rectilinear cutting part 27 of the knife 26 comes into cutting contact with the cutting block 43. Only a straight buttonhole 55 with the length L 27 is cut.

Eine Alternative ergibt sich aus den Figuren 10 und 11. Hierbei weist das Messer 26' einen mittleren geradlinigen Schneidenteil 27 und an dessen beiden Enden jeweils einen Augen-Schneidenteil 28 und 28' auf. Die Schneid-Blöcke 42', 43' sind so ausgebildet, dass der erste Schneid-Block 42' nur mit dem geradlinigen Schneidenteil 27 und dem Augen-Schneidenteil 28 in Schneidverbindung kommt, während der zweite Schneid-Block 43' so ausgebildet ist, dass er nur mit dem geradlinigen Schneidenteil 27 und dem Augen-Schneidenteil 28' in Schneidverbindung kommt. Diese Ausgestaltung ermöglicht damit die Erzeugung von in ihrer Lage unterschiedlichen Augenknopflöchern.An alternative results from FIGS. 10 and 11. Here, the Knife 26 'and a middle rectilinear cutting part 27 an eye cutting part 28 and 28 'on both ends. The Cutting blocks 42 ', 43' are designed so that the first cutting block 42 'only with the straight cutting part 27 and the eye cutting part 28 comes into cutting connection while the second cutting block 43 'is designed such that it only has the rectilinear cutting part 27 and the eye cutting part 28 'comes into cutting connection. This Design thus enables the generation of different in their position Eyelet buttonholes.

Der Schneid-Antrieb 19 in der Ausgestaltung nach Fig. 12 wird im Wesentlichen durch einen Mehrkammer-Zylinder 56 gebildet, der mittels des Gelenks 20 in der Grundplatte 2 befestigt ist. In ihm ist eine Kolbenstange 57 angeordnet, deren äußeres Ende über das Gelenk 22 mit dem Hebel 21 verbunden ist. Im Zylinder 56 sind insgesamt vier Kammern 58 bis 61 durch Trennwände 62, 63, 64 voneinander getrennt, die jeweils abgedichtet von der Kolbenstange 57 durchsetzt werden. Die Kammern 58 bis 61 sind also - bezogen auf die Länge des Zylinders 56 - hintereinander angeordnet. In jeder Kammer ist ein Kolben 65, 66, 67, 68 angeordnet, der fest mit der Kolbenstange 57 verbunden ist und gegenüber dem Zylinder 56 abgedichtet ist. Die Kammern 58, 59, 60, 61 mit den Kolben 65 bis 68 bilden also vier räumlich hintereinander angeordnete, aktive Linear-Antriebe. Der Kolben 65 in der ersten Kammer 58 ist zweiseitig beaufschlagbar ausgebildet, und zwar über Leitungen 69, 70, d.h. hierdurch ist die Kolbenstange je nach Beaufschlagung in Ausschub-Richtung 71 oder in Einschub-Richtung 72 beaufschlagbar.The cutting drive 19 in the embodiment according to FIG. 12 is in the Essentially formed by a multi-chamber cylinder 56, which by means of of the joint 20 is fixed in the base plate 2. There is a piston rod in it 57 arranged, the outer end of the hinge 22 with the Lever 21 is connected. There are a total of four chambers 58 in cylinder 56 to 61 separated by partitions 62, 63, 64, each sealed are penetrated by the piston rod 57. Chambers 58 to 61 are - in relation to the length of the cylinder 56 - one behind the other arranged. A piston 65, 66, 67, 68 is arranged in each chamber is firmly connected to the piston rod 57 and opposite the cylinder 56 is sealed. Form the chambers 58, 59, 60, 61 with the pistons 65 to 68 four active linear drives arranged one behind the other. The piston 65 in the first chamber 58 is designed to be acted upon from two sides, namely via lines 69, 70, i.e. this is the piston rod depending on the loading in extension direction 71 or in extension direction 72 acted upon.

Die drei weiteren Kammern 59, 60, 61 sind mittels einer gemeinsamen Leitung 73 nur derartig beaufschlagbar, dass auf die Kolbenstange 57 eine Kraft in Ausschub-Richtung 71 ausgeübt wird. Die drei Leitungen 69, 70, 73 sind mittels dreier Mehrwege-Ventile 74, 75, 76 beaufschlagbar, die von der Steuer-Einheit 46 mittels der Bedien-Einheit 48 ansteuerbar sind. The three further chambers 59, 60, 61 are by means of a common line 73 can only be acted upon in such a way that a Force in extension direction 71 is exerted. The three lines 69, 70, 73 can be acted upon by three multi-way valves 74, 75, 76, which by the control unit 46 can be controlled by means of the control unit 48.

Alle Kolben 65 bis 68 und dementsprechend auch die Kammern 58 bis 61 haben gleichen Durchmesser; der Druck der ihnen über die Ventile 74 bis 76 zugeführten Druckluft ist gleich, sodass je nach Beaufschlagung von jedem beaufschlagten Kolben 65 bis 68 die gleiche Kraft auf die Kolbenstange 57 ausgeübt wird. Eine insgesamt vierstufige, auf die Kolbenstange 57 in Ausschub-Richtung 71 ausgeübte Ausschubkraft und damit eine auf das Messer 26 bzw. 26' ausgeübte Schneidkraft wird so in einer Abstufung von 25 %, 50 %, 75 % oder 100 % der maximal möglichen Ausschubkraft ausgeübt. Dies geschieht wie folgt:All pistons 65 to 68 and, accordingly, the chambers 58 to 61 have the same diameter; the pressure of them through the valves 74 to 76 compressed air supplied is the same, so depending on the application of each loaded piston 65 to 68 the same force on the piston rod 57 is exercised. A total of four stages on the piston rod 57 in the direction of extension 71 and thus an extension force the knife 26 or 26 'exerted cutting force is in a gradation of 25%, 50%, 75% or 100% of the maximum possible extension force exercised. This is done as follows:

Bei Beaufschlagung nur des Kolbens 65 über die Leitung 70 und das Ventil 75 wird die Kolbenstange 57 in Ausschub-Richtung 71 mit 25 % der maximal möglichen Ausschubkraft beaufschlagt.When only the piston 65 is acted upon via the line 70 and the valve 75 the piston rod 57 in the extension direction 71 with 25% of the maximum possible extension force.

Bei Beaufschlagung der Kolben 66, 67, 68 und bei gleichzeitiger Beaufschlagung des Kolbens 65 über die Leitung 69 und das Ventil 74 wird die Kolbenstange 57 mit 50 % der maximal möglichen Ausschubkraft in Ausschub-Richtung 71 beaufschlagt. Dies ergibt sich daraus, dass durch Beaufschlagung des Kolbens 65 über die Leitung 69 eine Gegenkraft auf die Kolbenstange 57 in Einschub-Richtung 72 ausgeübt wird, die zu einer Teil-Kompensierung der an den Kolben 66, 67, 68 in Ausschub-Richtung 71 wirkenden Kräfte führt.When the pistons 66, 67, 68 are acted upon and simultaneously acted on of the piston 65 via line 69 and valve 74 is the Piston rod 57 with 50% of the maximum possible extension force in the extension direction 71 acted upon. This results from the fact that it is acted upon of the piston 65 via the line 69 a counterforce on the Piston rod 57 is exerted in the insertion direction 72, which leads to partial compensation the piston 66, 67, 68 in extension direction 71 forces.

Wenn nur die Kolben 66, 67, 68 über die Leitung 73 und das Ventil 76 beaufschlagt werden, dann wird auf die Kolbenstange 57 eine Kraft in Ausschub-Richtung 71 in Höhe von 75 % der insgesamt möglichen Ausschubkraft ausgeübt. If only pistons 66, 67, 68 via line 73 and valve 76 are applied, then a force in on the piston rod 57 Extension direction 71 in the amount of 75% of the total possible extension force exercised.

Wenn der Kolben 65 über die Leitung 70 und das Mehrwege-Ventil 75 beaufschlagt wird und gleichzeitig die Kolben 66 bis 68 über die Leitung 73 und das Ventil 76 beaufschlagt werden, dann wirken auf die Kolbenstange 57 100 % der insgesamt möglichen Ausschubkraft.When the piston 65 acts on the line 70 and the multi-way valve 75 and simultaneously the pistons 66 to 68 via the line 73 and the valve 76 are acted upon, then act on the piston rod 57 100% of the total possible extension force.

Zum Einfahren der Kolbenstange 57, d. h. zum Abheben des Messers 26, 26' vom Amboss 18 nach Durchführung eines Schneidvorganges, wird ausschließlich der Kolben 65 über die Leitung 69 und das Ventil 74 beaufschlagt, während die beiden anderen Leitungen 70, 73 entlüftet werden.To retract the piston rod 57, d. H. to lift the knife 26, 26 'from the anvil 18 after performing a cutting operation only the piston 65 is acted upon via the line 69 and the valve 74, while the other two lines 70, 73 are vented.

Bei der alternativen Ausgestaltung des Schneid-Antriebs 19' gemäß Fig. 13 ist ein doppelseitig pneumatisch beaufschlagbarer Kolben-Zylinder-Antrieb 77 vorgesehen, dessen Zylinder 78 einerseits und dessen Kolbenstange 79 andererseits in einen Kniehebel-Mechanismus 80 eingebunden sind. Dieser Kniehebel-Mechanismus 80 ist einerseits mittels des Gelenks 22 mit dem Schwenk-Hebel 21 verbunden und andererseits mittels des Gelenks 20 auf einem Kraft-Begrenzer 81 abgestützt. Der Zylinder 78 ist über ein Mehrwege-Ventil 82 und zwei Leitungen 83, 84 verbunden, die beidseitig des Kolbens 85 des Antriebs 77 in den Zylinder 78 einmünden. Je nach Beaufschlagung des Kolbens 85 über eine der Leitungen 83 oder 84 wird der Schwenk-Hebel 21 derartig verschwenkt, dass der Schneid-Antrieb 19' eine Schneidbewegung des Messers 26 bzw. 26' ausführt oder das Messer 26, 26' in seine obere Ruhelage zurückbringt. Bei Beaufschlagung des Kolbens 85 über die Leitung 83 nimmt der Kniehebel-Mechanismus 80 seine Strecklage ein, wodurch eine Schneidbewegung ausgeführt wird, während bei Beaufschlagung der Leitung 84 das Messer 26, 26' wieder in seine obere Ruhelage gehoben wird. In the alternative embodiment of the cutting drive 19 'according to FIG. 13 is a double-acting pneumatically actuated piston-cylinder drive 77 provided, the cylinder 78 on the one hand and the piston rod 79 on the other hand, are integrated into a toggle mechanism 80. This Toggle mechanism 80 is on the one hand by means of the joint 22 with the Swivel lever 21 connected and on the other hand by means of the joint 20 supported a force limiter 81. The cylinder 78 is via a multi-way valve 82 and two lines 83, 84 connected on both sides of the Open piston 85 of drive 77 in cylinder 78. Depending on the exposure of the piston 85 via one of the lines 83 or 84 Swivel lever 21 pivoted in such a way that the cutting drive 19 ' performs a cutting movement of the knife 26 or 26 'or the knife 26, 26 'in its upper rest position. When the Piston 85 via line 83 takes the toggle mechanism 80 its extended position, whereby a cutting movement is carried out, while when the line 84 is acted upon, the knife 26, 26 'is in again its upper rest position is raised.

Eine Begrenzung der auf den Schwenk-Hebel 21 und damit das Messer 26 bzw. 26' ausgeübten Kraft wird durch den Kraft-Begrenzer 81 bewirkt. Dieser weist ein vieretagiges Widerlager 86 auf, das sich mittels eines ortsfesten Teils 87 ortsfest, d. h. unbeweglich, in der Grundplatte 2 abstützt. Der ortsfeste Teil 87 des Widerlagers 86 trägt einen nachgiebigen Teil 88, auf dem sich der Kniehebel-Mechanismus 80 mittels des Gelenks 20 abstützt. Der ortsfeste Teil 87 ist gestellartig aufgebaut und weist übereinander vier pneumatisch beaufschlagbare Membran-Zylinder 90, 91, 92, 93 als passive Linear-Antriebe auf. Der nachgiebige Teil 88 des Widerlagers 86 weist ebenfalls jeweils übereinander Zwischenböden 94 auf, wobei jeweils ein Zwischenboden 94 oberhalb eines Zwischenbodens 89 angeordnet ist. Die Membran-Zylinder 90 bis 93 sind also jeweils auf einem Zwischenboden 89 und unterhalb eines Zwischenbodens 94 angeordnet. Jeder Membran-Zylinder 90 bis 93 weist unterhalb seiner Membran 95, also in seinem Innenraum, einen inneren Anschlag 96 auf. Auf der Membran 95 ist jeweils ein äußerer Anschlag 97 angebracht. Der jeweilige äußere Anschlag 97 kann also mittels der jeweiligen Membran 95 vertikal bewegt werden.A limitation on the pivot lever 21 and thus the knife 26 or 26 'exerted force is caused by the force limiter 81. This has a four-day abutment 86, which is fixed by means of a stationary Part 87 stationary, d. H. immovable, supported in the base plate 2. The stationary part 87 of the abutment 86 carries a flexible part 88, on which the toggle mechanism 80 is supported by means of the joint 20. The stationary part 87 is constructed like a frame and points one above the other four pneumatically actuated membrane cylinders 90, 91, 92, 93 as passive linear drives. The compliant part 88 of the abutment 86 also has intermediate shelves 94 one above the other, wherein each an intermediate floor 94 is arranged above an intermediate floor 89. The membrane cylinders 90 to 93 are each on an intermediate floor 89 and arranged below an intermediate floor 94. Everyone Membrane cylinder 90 to 93 points below its membrane 95, ie in its interior, an inner stop 96. On the membrane 95 is an outer stop 97 is attached. The respective outer stop 97 can therefore be moved vertically by means of the respective membrane 95 become.

In drucklosem Zustand befinden sich die Membranen 95 in Kontakt mit den inneren Anschlägen 96, während bei einer Beaufschlagung mit Druckluft die äußeren Anschläge 97 mit einem Rand 97a an einem Membran-Zylinderdeckel 91a zur Anlage gelangen. Die Bemessung ist derart, dass jeder Membranzylinder nur einen kleinen Hub von beispielsweise ein bis zwei Millimeter ausführen kann.In the depressurized state, the membranes 95 are in contact with the inner stops 96 while being pressurized with compressed air the outer stops 97 with an edge 97a on a membrane cylinder cover 91a get to the system. The design is such that each membrane cylinder only has a small stroke of, for example, one to can run two millimeters.

Die Membran-Zylinder 91, 92, 93 werden über Leitungen 98, 99, 100 über Mehrwege-Ventile 101, 102, 103 mit Druckluft beaufschlagt. Der Membran-Zylinder 90 ist an die Leitung 83 angeschlossen, die den Antrieb 77 beaufschlagt.The membrane cylinders 91, 92, 93 are connected via lines 98, 99, 100 Multi-way valves 101, 102, 103 acted on with compressed air. The membrane cylinder 90 is connected to line 83 which drives drive 77 applied.

Je nachdem, ob bei einer Beaufschlagung des Antriebs 77 in Schneidrichtung nur der immer gleichzeitig beaufschlagte Membran-Zylinder 90 oder noch ein oder zwei oder drei Membran-Zylinder 91 bis 93 beaufschlagt werden, wird auf den Kniehebel-Mechanismus 80 über das Gelenk 20 eine Widerlager-Kraft von 25 %, 50 %, 75 % oder 100 % der maximal möglichen Widerlager-Kraft ausgeübt. Hierdurch wiederum wird die auf den Schwenk-Hebel 21 ausgeübte Kraft begrenzt.Depending on whether the drive 77 is acted upon in the cutting direction only the membrane cylinder 90 or always acted on simultaneously another one or two or three membrane cylinders 91 to 93 acted upon be on the toggle mechanism 80 via the joint 20 one Abutment force of 25%, 50%, 75% or 100% of the maximum possible Abutment force exerted. This in turn is the on Swing lever 21 exerted force limited.

Die Größe der ausgeübten Kräfte kann durch einen Druckregler 104 vorgegeben werden, der ebenfalls über die Bedien-Einheit 48 angesteuert wird. Ein gleichartiger Druckregler kann selbstverständlich auch bei dem Ausführungsbeispiel nach Fig. 12 vorgesehen werden. Im Übrigen erfolgt auch bei dem Ausführungsbeispiel nach Fig. 13 die Ansteuerung der Ventile 82, 101, 102, 103 über die Bedien-Einheit 48.The size of the forces exerted can be predetermined by a pressure regulator 104 be controlled, which is also controlled via the control unit 48. A similar pressure regulator can of course also be used in the exemplary embodiment 12 are provided. For the rest, also takes place 13 the control of the valves 82, 101, 102, 103 via the control unit 48.

Der Zweck der Kraft-Abstufung besteht in einer Anpassung der Schneid-Vorrichtung 16 an unterschiedliche Schneidbedingungen, die durch die Härte des Nähgutes, die Art des Nähgutes, die Anzahl zu schneidender Nähgut-Lagen, aber auch durch die Form und/oder Größe des auszuführenden Schnittes beeinflusst werden. Zusammenfassend wird mit der Anpassung der Schneidkraft eine flexible, den Schneidbedingungen anpassbare Schneid-Vorrichtung 16 geschaffen, bei der Messer 26, 26' und Amboss 18 vor unnötigem Verschleiß durch zu hohe Schneidkräfte geschützt sind, womit die Betriebsbereitschaft beträchtlich gesteigert wird.The purpose of the force gradation is to adapt the cutting device 16 to different cutting conditions caused by the Hardness of the sewing material, the type of sewing material, the number of items to be cut Layers of material, but also by the shape and / or size of the material to be carried out Cut can be influenced. In summary, with the adjustment the cutting force is flexible and adaptable to the cutting conditions Cutting device 16 created in the knife 26, 26 'and Anvil 18 protected against unnecessary wear due to excessive cutting forces are, which significantly increases operational readiness.

Claims (9)

Knopfloch-Nähmaschine mit einer auf- und abgehenden, antreibbaren Nadel (7), mit einem x-y-Tisch (8), der mittels eines x-Antriebs (9) in x-Richtung und mittels eines y-Antriebs (10) in y-Richtung verschiebbar ist und mindestens eine Nähgutklammer (12a, 12b) trägt, und mit einer Knopfloch-Schneid-Vorrichtung (16), die im Wesentlichen in y-Richtung hinter der Nadel (7) angeordnet ist, einen Schneid-Teil (17) mit einem Messer (26, 26') aufweist, eine Schneid-Block-Einheit mit mehreren Schneid-Blöcken (42, 43) aufweist, von denen jeweils einer in eine mit dem Messer (26, 26') zusammenwirkende Position bringbar ist, und mit einem Schneid-Antrieb (19, 19') versehen ist, dadurch gekennzeichnet, dass ein mindestens zwei in x-Richtung verstellbare Schneid-Blöcke (42, 43) tragender Amboss (18) ortsfest mit der Nähmaschine verbunden ist und dass das Messer (26, 26') von oben gegen den Amboss (18) bewegbar ausgebildet ist. Buttonhole sewing machine with an up and down, drivable needle (7), with an xy table (8) that by means of an x drive (9) in the x direction and by means of a y drive (10) in the y direction and carries at least one workpiece clamp (12a, 12b), and with a buttonhole cutting device (16), the is arranged essentially in the y-direction behind the needle (7), has a cutting part (17) with a knife (26, 26 '), has a cutting block unit with a plurality of cutting blocks (42, 43), one of which can be brought into a position cooperating with the knife (26, 26 '), and is provided with a cutting drive (19, 19 '), characterized, that an anvil (18) carrying at least two cutting blocks (42, 43) adjustable in the x direction is fixedly connected to the sewing machine and that the knife (26, 26 ') is designed to be movable from above against the anvil (18). Knopfloch-Nähmaschine nach Anspruch 1, dadurch gekennzeichnet, dass die Schneid-Blöcke (42, 43) mittels eines in den Amboss (18) integrierten Verstell-Antriebs (34) in x-Richtung verschiebbar ausgebildet sind. Buttonhole sewing machine according to claim 1, characterized in that the cutting blocks (42, 43) are designed to be displaceable in the x direction by means of an adjustment drive (34) integrated in the anvil (18). Knopfloch-Nähmaschine nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Schneid-Blöcke (42, 43) auf einem Träger (30) angeordnet sind, der auf einem Grundkörper (29) des Amboss (18) verschiebbar angeordnet ist.Buttonhole sewing machine according to claim 1 or 2, characterized in that the cutting blocks (42, 43) are arranged on a carrier (30) which is arranged displaceably on a base body (29) of the anvil (18). Knopfloch-Nähmaschine nach Anspruch 2, dadurch gekennzeichnet, dass der Verstell-Antrieb (34) als pneumatisch beaufschlagbarer Kolben-Zylinder-Antrieb ausgebildet ist.Buttonhole sewing machine according to claim 2, characterized in that the adjustment drive (34) is designed as a pneumatically actuated piston-cylinder drive. Knopfloch-Nähmaschine nach Anspruch 1, dadurch gekennzeichnet, dass das Messer (26, 26') einen geradlinigen Schneidenteil (27) und an dessen einem Ende einen Augen-Schneidenteil (28) aufweist.Buttonhole sewing machine according to claim 1, characterized in that the knife (26, 26 ') has a rectilinear cutting part (27) and at one end an eye cutting part (28). Knopfloch-Nähmaschine nach Anspruch 5, dadurch gekennzeichnet, dass das Messer (26') am anderen Ende des geradlinigen Schneidenteils (27) einen weiteren Augen-Schneidenteil (28') aufweist.Buttonhole sewing machine according to Claim 5, characterized in that the knife (26 ') has a further eye cutting part (28') at the other end of the rectilinear cutting part (27). Knopfloch-Nähmaschine nach Anspruch 3, dadurch gekennzeichnet, dass die Schneid-Blöcke (42, 43) lös- und auswechselbar auf dem Träger (30) angebracht sind.Buttonhole sewing machine according to claim 3, characterized in that the cutting blocks (42, 43) are detachably and interchangeably attached to the carrier (30). Knopfloch-Nähmaschine nach Anspruch 1, dadurch gekennzeichnet, dass das Messer (26, 26') mit veränderbarer Kraft gegen den Amboss (18) andrückbar ist.Buttonhole sewing machine according to claim 1, characterized in that the knife (26, 26 ') can be pressed against the anvil (18) with variable force. Knopfloch-Nähmaschine nach Anspruch 8, dadurch gekennzeichnet, dass der Schneid-Antrieb (19, 19') stufenweise wirkend ausgebildet ist.Buttonhole sewing machine according to claim 8, characterized in that the cutting drive (19, 19 ') is designed to act in stages.
EP03010636A 2002-06-10 2003-05-13 Buttonhole sewing machine Expired - Lifetime EP1371769B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10225511 2002-06-10
DE10225511A DE10225511C1 (en) 2002-06-10 2002-06-10 Button-hole sewing machine with XY-table, carries adjustable cutting blocks on anvil fixed to machine and causes blade to descend towards it

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EP1371769A2 true EP1371769A2 (en) 2003-12-17
EP1371769A3 EP1371769A3 (en) 2006-03-15
EP1371769B1 EP1371769B1 (en) 2007-03-28

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EP03010636A Expired - Lifetime EP1371769B1 (en) 2002-06-10 2003-05-13 Buttonhole sewing machine

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US (1) US6694901B2 (en)
EP (1) EP1371769B1 (en)
JP (1) JP2004008803A (en)
CN (1) CN100476053C (en)
AT (1) ATE358201T1 (en)
DE (2) DE10225511C1 (en)

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DE10304821B3 (en) * 2003-02-06 2004-02-26 Dürkopp Adler AG Buttonhole sewing machine has a buttonhole cutter, with a single blade at the base plate, and an adjustable cutting block moved by a motor and slide to cut a variety of buttonhole openings
JP4108548B2 (en) * 2003-06-19 2008-06-25 ミネベア株式会社 Keyboard switch
DE102004055713A1 (en) * 2004-03-22 2005-10-13 Dürkopp Adler AG Buttonhole sewing machine with a buttonhole cutter
DE102005021768A1 (en) 2005-05-11 2006-11-16 Dürkopp Adler AG Buttonhole sewing machine
JP4726569B2 (en) * 2005-08-04 2011-07-20 Ｊｕｋｉ株式会社 Sewing machine cloth cutting equipment
DE102011005936A1 (en) 2011-03-23 2012-09-27 Dürkopp Adler AG An eyelet buttonhole sewing machine and method for sewing an eyelet buttonhole seam having a gimptive path
DE102012205049A1 (en) 2012-03-29 2013-10-02 Dürkopp Adler AG Thread cutting assembly for a lace hole sewing machine
CH706492A1 (en) * 2012-05-09 2013-11-15 Bernina Int Ag Apparatus and method for punching a sheet with a sewing machine.

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JPH07328261A (en) * 1994-06-08 1995-12-19 Brother Ind Ltd Cutter for sewing machine for eyelet-hole working
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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

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DE3930562C1 (en) * 1989-09-13 1991-01-31 Duerkopp Adler Ag, 4800 Bielefeld, De
JPH07328261A (en) * 1994-06-08 1995-12-19 Brother Ind Ltd Cutter for sewing machine for eyelet-hole working
DE19716629C1 (en) * 1997-04-21 1998-08-20 Duerkopp Adler Ag 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

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DE10225511C1 (en) 2003-06-18
US6694901B2 (en) 2004-02-24
EP1371769B1 (en) 2007-03-28
ATE358201T1 (en) 2007-04-15
DE50306889D1 (en) 2007-05-10
US20030226485A1 (en) 2003-12-11
JP2004008803A (en) 2004-01-15
CN100476053C (en) 2009-04-08
EP1371769A3 (en) 2006-03-15
CN1468997A (en) 2004-01-21

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