EP1171662A1 - Device for adjusting the checking unit of a presser foot used in a sewing and/or embroidery machine - Google Patents

Device for adjusting the checking unit of a presser foot used in a sewing and/or embroidery machine

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Publication number
EP1171662A1
EP1171662A1 EP00907574A EP00907574A EP1171662A1 EP 1171662 A1 EP1171662 A1 EP 1171662A1 EP 00907574 A EP00907574 A EP 00907574A EP 00907574 A EP00907574 A EP 00907574A EP 1171662 A1 EP1171662 A1 EP 1171662A1
Authority
EP
European Patent Office
Prior art keywords
axis
drive
interception
presser
bearing
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
EP00907574A
Other languages
German (de)
French (fr)
Other versions
EP1171662B1 (en
Inventor
Thomas Heidtmann
Bernd Kirch
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.)
ZSK Stickmaschinen GmbH
Original Assignee
ZSK Stickmaschinen GmbH
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 ZSK Stickmaschinen GmbH filed Critical ZSK Stickmaschinen GmbH
Publication of EP1171662A1 publication Critical patent/EP1171662A1/en
Application granted granted Critical
Publication of EP1171662B1 publication Critical patent/EP1171662B1/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
    • D05B29/00—Pressers; Presser feet
    • D05B29/02—Presser-control devices

Definitions

  • the invention relates to a device for adjusting the interception device of a fabric presser of a sewing or embroidery machine.
  • Such an embroidery machine with a catching device for a presser is known from DE 3117140.
  • DE 3117140 With the interception device disclosed in DE 3117140 it is achieved that the presser no longer strikes the workpiece to be machined and thus the throat plate with the full force derived from the needle bar drive and transmitted via the intermediate spring, but is intercepted shortly before it hits , whereby at the same time a large part of the force inherent in the movement of the presser is absorbed before the presser is released with a certain time delay to carry out the remaining movement.
  • the interception device achieves considerable noise damping and the workpiece or the embroidery material is permanently damaged protected by the fabric printer.
  • the interception device consists essentially of a control cam which actuates an angle lever, one arm with an interception piece intercepting and releasing the accelerated fabric printer by a spring in the direction of the workpiece, so that the fabric printer hits the workpiece with braking.
  • a disadvantage of the interception device known from DE 3117140 is that, due to the rigid structure, the path of movement of the presser is the same for different workpiece thicknesses, so that with larger workpiece thicknesses the fabric printer strikes the surface of the workpiece with too great force, so that the advantages of Interception device are reduced.
  • DE 4324741 and DE 2938894 show interception devices for fabric printers, in which the path of movement of the fabric presser on the material thickness is possible.
  • a disadvantage of these devices is that they use complicated lever systems that are expensive in their Structure and susceptible to faults sin ⁇ . Due to the many moving parts, there are increased demands on the tolerances to be observed and the development of larvae is relatively large.
  • the object of the present invention is therefore to provide a device for setting a catch device of a fabric presser of a sewing machine, which is simple in its construction and enables adaptation to the most varied workpiece thicknesses.
  • the position of the mounting of the intercepting element which interacts directly with the fabric printer, is advantageously changed manually or automatically and held or locked in a specific position.
  • no additional elements are necessary, which must be arranged in the force transmission path between the interception element and the drive of the interception element.
  • the setting of the position of the support of the interception element which is advantageously an angle lever, should be freely movable and / or lockable in at least two positions or between two positions.
  • the bearing or the pivoting axis of the intercepting element can be pivoted about an axis, so that the position of the intercepting element e changes relative to the throat plate after the angle has been set.
  • the mounting of the interception element itself is mounted in a cylinder coaxially to its axis, the cylinder being mounted rotatably about its axis on the sewing or embroidery machine. If the cylinder is rotated, the storage, which, for. B. a bolt which is rotatably mounted in the cylinder coaxially to its axis around the axis, whereby the position of the bearing or the bearing pin to the throat plate changes.
  • the cylinder itself is by means of locking screws or a grid toothing, which, for. B. can be canceled against a spring force, locked in any angular position or in certain grid positions.
  • the angular adjustment of the rotatably mounted cylinder, which holds the mounting of the interception element can be carried out automatically by means of a drive.
  • the mounting of the interception element is not pivotally mounted about an axis, but is in particular parallel to the needle bar, for. B. lockable in an elongated hole in different positions.
  • the method of storage in the elongated hole can be carried out manually or automatically by means of a drive.
  • the material thickness in the vicinity of the presser below the presser is determined by means of a sensor and the position of the intercepting element is automatically adjusted by means of a drive.
  • Figure 1 is a side view of an embroidery head with an interception device according to the invention.
  • FIG. 3 shows an exploded view of the parts of an embroidery head relevant to the interception device
  • FIG. 4 shows an exploded view of an interception device according to the invention with an electric drive for automatically adjusting the mounting of the interception element;
  • FIG. 6 shows a multi-head embroidery machine with a central drive for the device according to the invention.
  • FIG. 1 shows a rare representation of the essential parts of the interception device.
  • At least one cam disk 5 is arranged on a shaft 4a which penetrates one embroidery head 4 or also other embroidery heads and which deflects a cam lever 12 which is pivotably mounted by means of the cam lever bearing 2 if the shaft 4a is rotated.
  • the free end of the one angle arm of the angle lever 10 carries a roller 9 which intercepts the presser 16, which is accelerated downwards by the spring F, and according to the movement of the angle lever 10, which is predetermined by the design of the guide curve of the cam plate 5 releases below.
  • the needle bar 17 is held by a guide 20 and is driven by the needle bar drive 15, which is not shown in FIG. 1.
  • the needle rod drive 15, like the angle lever 10, can be driven by the shaft 4a.
  • the position of the axis 10a of the angle lever 10 can be adjusted relative to the needle plate 19 and the embroidery base or workpiece 18 by rotating an eccentric bolt 7.
  • the eccentric bolt 7 is mounted in a bearing bush 8 and can be locked in any angular position by means of a locking screw 6 (FIG. 3).
  • the device has a bearing pin 2a, which is eccentric is arranged to an axis of rotation of part 2.
  • Part 2 lies with its cylindrical part 2b in one
  • the bearing pin 2a extends through the bore 3a and serves as a bearing for the cam lever 12.
  • the part 2 is by means of a plate 1 and one
  • a roller 14 or a ball bearing is mounted on a pin 13, which lies in the guide curve of the cam plate 5 and follows it when the cam plate 5 is rotated. Accordingly, the other arm and thus the angle lever 12 is pivoted.
  • FIG. 4 shows a further embodiment of the device according to the invention, the structure of the device essentially corresponding to that of the embodiment according to FIG. 3, but the eccentric bolt 7 being replaced by an eccentric bolt 21 which has a toothing (gear) at one end which is connected to a servomotor 22 via a toothed belt 23.
  • the eccentric bolt 21 and with it the bearing 10a of the angle lever 10 are automatically adjusted and held in the position.
  • FIGS. 5a and 5b show a further embodiment of the device according to FIG. 4, which has an additional sensor 24 which measures the material thickness or measures the distance between the surface of the workpiece 18 and the sensor 24.
  • the eccentric bolt 21 is rotated by means of the actuator 22 (not shown), as a result of which the pivot axis 10a of the angle lever 10 is pivoted relative to the throat plate 19.
  • the connecting rod 11 is used to compensate for the relative movements between the angle lever 10 and the cam lever 12 during the adjustment of either the cam lever 12 or the angle lever 10 by means of the respective adjusting device.
  • the mounting or the pivoting axis of the angle lever is not pivotably supported about an axis, but is moved linearly, manually or by means of a drive and locked in the required position. It is also conceivable that the bearing or the pivot axis can be moved and locked on any tracks.
  • FIG. 6 shows a multi-head embroidery machine with a central drive 24, which drives the eccentric bolts 21 of the individual embroidery heads 4 of the machine via a shaft 27 and toothed belt 23, as a result of which a height adjustment of the fabric presser can be carried out simultaneously for all embroidery heads. Since all embroidery heads mostly embroider identical embroidery patterns, it is sufficient to determine the distance from the surface of the embroidery material to the stitch plate only on one embroidery head or embroidery pattern in order to carry out the height adjustment for all embroidery heads at the same time based on the determined distance. In an embodiment, not shown, couplings are provided between the shaft 27 and the eccentric bolts 21, so that the height adjustment of certain embroidery heads 4 can optionally be or can be switched on.

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

Abstract

The invention relates to a device for adjusting a checking unit of a presser foot (16), used in a sewing or embroidery machine. A needle bar (17) moves the presser foot (16) towards a needle plate (19), using a spring (F) which is connected in series. The checking unit intercepts the presser foot (16) using a checking element (10) of said unit, before contact is made with the work piece (18) to be machined and controls the movement of said presser foot until the latter touches the work piece (18). The checking element (10) and the needle bar (17) are both operated by a common drive and the bedding position of the checking element (10) can be modified in relation to the needle plate (19).

Description

Vorrichtung zum Einstellen der -Abfangeinrichtung eines Stoffdrückers einer Nähmaschine und/oder StickmaschineDevice for setting the interception device of a presser of a sewing machine and / or embroidery machine
Die Erfindung betrifft eine Vorrichtung zum Einstellen der Abfangeinrichtung eines Stoffdrückers einer Näh- oder Stickmaschine .The invention relates to a device for adjusting the interception device of a fabric presser of a sewing or embroidery machine.
Eine derartige Stickmaschine mit einer Abfangeinrichtung für einen Stoffdrücker ist aus der DE 3117140 bekannt. Mit der in der DE 3117140 offenbarten Abfangeinrichtung wird erreicht, daß der Stoffdrücker nicht mehr mit der vollen, aus dem Nadelstangenantrieb abgeleiteten und über die zwischengeschaltete Feder übertragenen Kraft auf das zu bearbeitende Werkstück und damit auf die Stichplatte auftrifft, sondern kurz vor dem Auftreffen abgefangen wird, wodurch gleichzeitig ein Großteil der der Bewegung des Stoffdrückers innewohnenden Kraft aufgenommen wird, bevor der Stoffdrücker mit einer gewissen Zeitverzögerung zur Durchführung der restlichen Bewegung freigegeben wird. Durch die Abfangvorrichtung wird eine erhebliche Geräuschdämpfung erzielt und das Werkstück bzw. das Stickgut bei einer Dauerbelastung vor Beschädigungen durch den Stoffdrucker geschützt. Die Abfangvorrichtung besteht im wesentlichen aus einem Steuernocken, der einen Winkelhebel betätigt, dessen einer Arm mit einem Abfangstuck den von einer Feder in Richtung Werkstuck beschleunigten Stoffdrucker abfangt und zeitverzogernd freigibt, so daß der Stoffdrucker gebremst auf das Werkstuck auftrifft.Such an embroidery machine with a catching device for a presser is known from DE 3117140. With the interception device disclosed in DE 3117140 it is achieved that the presser no longer strikes the workpiece to be machined and thus the throat plate with the full force derived from the needle bar drive and transmitted via the intermediate spring, but is intercepted shortly before it hits , whereby at the same time a large part of the force inherent in the movement of the presser is absorbed before the presser is released with a certain time delay to carry out the remaining movement. The interception device achieves considerable noise damping and the workpiece or the embroidery material is permanently damaged protected by the fabric printer. The interception device consists essentially of a control cam which actuates an angle lever, one arm with an interception piece intercepting and releasing the accelerated fabric printer by a spring in the direction of the workpiece, so that the fabric printer hits the workpiece with braking.
Nachteilig bei der aus der DE 3117140 bekannten Abfangeinrichtung ist, daß bedingt durch den starren Aufbau die Bewegungsbahn des Stoffdrückers für verschiedene Werkstuckdicken gleich ist, so daß bei größeren Werkstuckdicken der Stoffdrucker mit zu großer Kraft auf die Oberflache des Werkstucks auftrifft, so daß die Vorteile der Abfangeinrichtung gemindert werden.A disadvantage of the interception device known from DE 3117140 is that, due to the rigid structure, the path of movement of the presser is the same for different workpiece thicknesses, so that with larger workpiece thicknesses the fabric printer strikes the surface of the workpiece with too great force, so that the advantages of Interception device are reduced.
Aus der DE 19628524 ist eine Einrichtung beschrieben, m t der der Stoffdrucker in eine Zufluchtsstellung nach dem Nahvorgang bewegt wird. Eine Anpassung an Werkstoffdicken ist nicht vorgesehen.DE 19628524 describes a device with which the fabric printer is moved into a refuge position after the close process. An adaptation to material thicknesses is not planned.
Einen sehr aufwendigen und teuren Weg beschreibt die DE 4302094, bei der der Stoffdrucker über einen separaten Antriebsmotor bewegt wird, wodurch beliebige Bewegungsbahnen und somit Anpassungen an verschiedene Werkstoffdicken realisierbar sind. Der zusätzliche Antrieb erfordert jedoch eine aufwendige Synchronisation der beiden Antriebe für die Nadelstange und den Stoffdrucker .DE 4302094 describes a very complex and expensive route, in which the fabric printer is moved via a separate drive motor, as a result of which any movement paths and thus adaptations to different material thicknesses can be implemented. However, the additional drive requires a complex synchronization of the two drives for the needle bar and the fabric printer.
Die DE 4324741 und DE 2938894 zeigen Abfangeinrichtungen für Stoffdrucker, bei denen die Bewegungsbahn des Stoffdrückers an die Werkstoffdicke möglich ist. Nachteilig bei diesen Einrichtungen ist, daß sie sich komplizierter Hebelsysteme bedienen, die teuer in ihrem Aufbau und störanfällig sinα. Durch die vielen bewegten Teile sind erhöhte Anforderungen an die einzuhaltenden Toleranzen gestellt und die Larmentwicklung relativ groß .DE 4324741 and DE 2938894 show interception devices for fabric printers, in which the path of movement of the fabric presser on the material thickness is possible. A disadvantage of these devices is that they use complicated lever systems that are expensive in their Structure and susceptible to faults sinα. Due to the many moving parts, there are increased demands on the tolerances to be observed and the development of larvae is relatively large.
Aufgabe der vorliegenden Erfindung ist es daher, eine Vorrichtung zum Einstellen einer Abfangeinrichtung eines Stoffdrückers einer Nahmaschine bereitzustellen, welche einfach m ihrem Aufbau ist und eine Anpassung an verschiedenste Werkstuckdicken ermöglicht.The object of the present invention is therefore to provide a device for setting a catch device of a fabric presser of a sewing machine, which is simple in its construction and enables adaptation to the most varied workpiece thicknesses.
Diese Aufgabe wird erfmdungsgemaß von einer Vorrichtung mit den -Merkmalen des Ansprucns 1 gelost.According to the invention, this object is achieved by a device having the features of claim 1.
Vorteilhaft wird bei der erfmdungsgemaßen Vorrichtung die Position der Lagerung αes Abfangelementes, welches direkt mit dem Stoffdrucker zusammenwirkt manuell oder automatisch verändert und in einer bestimmten Lage festgehalten bzw. arretiert. Hierdurch sind keine zusatzlichen Elemente notwendig, welche in der Kraftubertragungsstrecke zwischen dem Abfangelement und dem Antrieb des Abfangelementes angeordnet werden müssen. Die Einstellung der Position der Lagerung des Abfangelementes, welches vorteilhaft ein Winkelhebel ist, sollte in mindestens zwei Positionen oder zwischen zwei Positionen beliebig verfahrbar und/oder arretierbar sein.In the device according to the invention, the position of the mounting of the intercepting element, which interacts directly with the fabric printer, is advantageously changed manually or automatically and held or locked in a specific position. As a result, no additional elements are necessary, which must be arranged in the force transmission path between the interception element and the drive of the interception element. The setting of the position of the support of the interception element, which is advantageously an angle lever, should be freely movable and / or lockable in at least two positions or between two positions.
In einer besonderen Ausfuhrungsform der Vorrichtung ist die Lagerung bzw. die Verschwenkachse des Abfangelementes um eine Achse herum verschwenkbar, so daß sich die Position des Abfangelementes e nach eingestelltem Winkel relativ zur Stichplatte ändert. Hierzu ist die Lagerung des Abfangelementes selbst in einem Zylinder koaxial zu dessen Achse gelagert, wobei der Zylinder drehbar um seine Achse an der Nah- bzw. Stickmaschine gelagert ist. Wird der Zylinder verdreht, wird die Lagerung, welche z. B. ein Bolzen, welcher drehbar in dem Zylinder koaxial zu dessen Achse gelagert ist um die Achse herum bewegt, wodurch sich die Position der Lagerung bzw. des Lagerbolzens zur Stichplatte verändert. Hierdurch wird mit einfachen Mitteln vorteilhaft eine Dickenanpassung des Stoffdrückers an das Werkstück bzw. Stickgut ermöglicht. Der Zylinder selbst ist mittels Feststellschrauben oder einer Rasterverzahnung, welche z. B. gegen eine Federkraft aufhebbar ist, in beliebigen Winkelstellungen oder in bestimmten Rasterstellungen arretierbar .In a special embodiment of the device, the bearing or the pivoting axis of the intercepting element can be pivoted about an axis, so that the position of the intercepting element e changes relative to the throat plate after the angle has been set. For this purpose, the mounting of the interception element itself is mounted in a cylinder coaxially to its axis, the cylinder being mounted rotatably about its axis on the sewing or embroidery machine. If the cylinder is rotated, the storage, which, for. B. a bolt which is rotatably mounted in the cylinder coaxially to its axis around the axis, whereby the position of the bearing or the bearing pin to the throat plate changes. This advantageously enables simple adjustment of the thickness of the presser to the workpiece or embroidery material. The cylinder itself is by means of locking screws or a grid toothing, which, for. B. can be canceled against a spring force, locked in any angular position or in certain grid positions.
Die Winkelverstellung des drehbar gelagerten Zylinders, welcher die Lagerung des Abfangelementes hält, kann in einer weiteren vorteilhaften Ausführungsform der erfindungsgemäßen Vorrichtung automatisch mittels eines Antriebes erfolgen.In a further advantageous embodiment of the device according to the invention, the angular adjustment of the rotatably mounted cylinder, which holds the mounting of the interception element, can be carried out automatically by means of a drive.
In einer weiteren Ausführungsform ist die Lagerung des Abfangelementes nicht um eine Achse herum verschwenkbar gelagert, sondern ist insbesondere parallel zur Nadelstange z. B. in einem Langloch in verschiedenen Positionen arretierbar. Das Verfahren der Lagerung in dem Langloch kann ebenso wie bei den vorher beschriebenen Ausführungsformen manuell oder automatisch mittels eines Antriebs erfolgen.In a further embodiment, the mounting of the interception element is not pivotally mounted about an axis, but is in particular parallel to the needle bar, for. B. lockable in an elongated hole in different positions. As in the previously described embodiments, the method of storage in the elongated hole can be carried out manually or automatically by means of a drive.
In einer weiteren Ausgestaltung der vorbeschriebenen Ausführungsformen wird mittels eines Sensors die Werkstoffdicke in der Nähe des Stoffdrückers unterhalb des Stoffdrückers ermittelt und die Position des Abfangelementes automatisch mittels eines Antriebes eingeregelt. Hierdurch wird vorteilhaft gewährleistet, daß auch bei einem Werkstuck, dessen Dicke an verschiedenen Stellen unterschiedlich stark ausgeprägt ist, wahrend des Stick- bzw. Nahvorgangs der Stoffdrucker immer optimal auf das Werkstuck auftrifft.In a further embodiment of the above-described embodiments, the material thickness in the vicinity of the presser below the presser is determined by means of a sensor and the position of the intercepting element is automatically adjusted by means of a drive. This advantageously ensures that even with a workpiece, the thickness of which is different at different points, the fabric printer always optimally strikes the workpiece during the embroidery or sewing process.
Nachfolgend werden verschieαene Ausfuhrungsformen der Erfindung anhand von Zeichnungen naher erläutert.Various embodiments of the invention are explained in more detail below with reference to drawings.
Es zeigen:Show it:
Figur 1 eine Seitenansicht eines Stickkopfes mit einer erfmdungsgemaßen Abfangvorrichtung;Figure 1 is a side view of an embroidery head with an interception device according to the invention;
Figuren 2a u. 2b unterschiedliche Einstellungen derFigures 2a u. 2b different settings of the
Position des Abfangelementes;Position of the interception element;
Figur 3 eine Explosionsdarstellung der für die Abfangeinrichtung relevanten Teile eines Stickkopfes;FIG. 3 shows an exploded view of the parts of an embroidery head relevant to the interception device;
Figur 4 eine Explosionsdarstellung einer erfmdungsgemaßen Abfangeinrichtung mit einem elektrischen Antrieb zur automatischen Einstellung der Lagerung des Abfangelementes;FIG. 4 shows an exploded view of an interception device according to the invention with an electric drive for automatically adjusting the mounting of the interception element;
Figuren 5a u. 5b Abfangeinrichtung mit Abstandssensor;Figures 5a u. 5b interception device with distance sensor;
Figur 6 eine Mehrkopf-Stickmaschme mit einem zentralen Antrieb für die erf dungsgemaße Vorrichtung.6 shows a multi-head embroidery machine with a central drive for the device according to the invention.
Die Figur 1 zeigt eme Seltendarstellung der wesentlichen Teile der Abfangeinrichtung. Der Stickkopf 4, an dem die Teile der Abfangeinrichtung sowie die Nadelstangenfuhrung und der Nadelstangenantrieb angeordnet sind ist gestrichelt dargestellt. Auf einer den einen Stickkopf 4 oder auch weitere Stickköpfe durchgreifenden Welle 4a ist mindestens eine Kurvenscheibe 5 angeordnet, die einen Kurvenhebel 12, welcher verschwenkbar mittels der Kurvenhebellagerung 2 gelagert ist auslenkt, sofern die Welle 4a verdreht wird. Über ein Pleuel 11 wird ein Winkelhebel 10, welcher das Abfangelement bildet und drehbar um die Achse 10a verschwenkbar gelagert ist, ausgelenkt. Das freie Ende des einen Winkelarms des Winkelhebels 10 trägt eine Rolle 9 die den Stoffdrücker 16, welcher durch die Feder F nach unten beschleunigt wird, abfängt und entsprechend der Bewegung des Winkelhebels 10, welche durch die Gestaltung der Führungskurve der Kurvenscheibe 5 vorgegeben ist, nach unten hin freigibt. Die Nadelstange 17 wird von einer Führung 20 gehalten und wird über den Nadelstangenantrieb 15 angetrieben, welcher in der Figur 1 nicht weiter dargestellt ist. Der Nadelsrangenantrieb 15 kann ebenso wie der Winkelhebel 10 von der Welle 4a angetrieben werden.FIG. 1 shows a rare representation of the essential parts of the interception device. The embroidery head 4, on which the parts of the interception device and the needle bar guide and the needle bar drive are arranged shown in dashed lines. At least one cam disk 5 is arranged on a shaft 4a which penetrates one embroidery head 4 or also other embroidery heads and which deflects a cam lever 12 which is pivotably mounted by means of the cam lever bearing 2 if the shaft 4a is rotated. An angle lever 10, which forms the interception element and is rotatably mounted so as to be pivotable about the axis 10a, is deflected via a connecting rod 11. The free end of the one angle arm of the angle lever 10 carries a roller 9 which intercepts the presser 16, which is accelerated downwards by the spring F, and according to the movement of the angle lever 10, which is predetermined by the design of the guide curve of the cam plate 5 releases below. The needle bar 17 is held by a guide 20 and is driven by the needle bar drive 15, which is not shown in FIG. 1. The needle rod drive 15, like the angle lever 10, can be driven by the shaft 4a.
Wie aus den Figuren 2a und 2b ersichtlich, kann durch Verdrehen eines Exzenterbolzens 7 die Position der Achse 10a des Winkelhebels 10 relativ zur Stichplatte 19 und dem Stickgrund bzw. Werkstück 18 verstellt werden. Der Exzenterbolzen 7 ist hierzu in einer Lagerbuchse 8 gelagert und kann mittels einer Feststellschraube 6 (Figur 3) in beliebigen Winkelpositionen arretiert werden.As can be seen from FIGS. 2a and 2b, the position of the axis 10a of the angle lever 10 can be adjusted relative to the needle plate 19 and the embroidery base or workpiece 18 by rotating an eccentric bolt 7. For this purpose, the eccentric bolt 7 is mounted in a bearing bush 8 and can be locked in any angular position by means of a locking screw 6 (FIG. 3).
Zusätzlich zur Verstellung der Höhe des Winkelhebels 10 ist es möglich, die Verschwenkachse des Kurvenhebels 12 in verschiedenen Positionen zu arretieren. Hierzu besitzt die Vorrichtung einen Lagerstift 2a, welcher exzentrisch zu einer Rotationsachse des Teils 2 angeordnet ist. DasIn addition to adjusting the height of the angle lever 10, it is possible to lock the pivot axis of the cam lever 12 in different positions. For this purpose, the device has a bearing pin 2a, which is eccentric is arranged to an axis of rotation of part 2. The
Teil 2 liegt mit seinem zylindrischen Teil 2b in einerPart 2 lies with its cylindrical part 2b in one
Bohrung 3a einer Grundplatte 3 ein und ist in dieser verdrehbar gelagert. Der Lagerstift 2a durchgreift die Bohrung 3a und dient als Lagerung des Kurvenhebels 12.Bore 3a of a base plate 3 and is rotatably mounted in this. The bearing pin 2a extends through the bore 3a and serves as a bearing for the cam lever 12.
Das Teil 2 ist mittels einer Platte 1 und einerThe part 2 is by means of a plate 1 and one
Feststellschraube la in beliebigen WinkelstellungenLocking screw la in any angular position
(Pfeile) zur Grundplatte 3 arretierbar. Durch das(Arrows) to base plate 3 can be locked. By the
Verdrehen des Teils 2 wirα der Lagerstift 2a um die Drehachse des Teils 2 verschwenkt und verändert hierdurch seine Position.Rotation of the part 2, the bearing pin 2a is pivoted about the axis of rotation of the part 2 and thereby changes its position.
An dem einen Arm des Kurvenhebels 12 ist auf einem Stift 13 eine Rolle 14 oder ein Kugellager gelagert, welche in der Fuhrungskurve der Kurvenscheibe 5 emliegt und dieser beim Verdrehen der Kurvenscheibe 5 folgt. Entsprechend wird der andere Arm und somit der Winkelhebel 12 verschwenkt .On one arm of the cam lever 12, a roller 14 or a ball bearing is mounted on a pin 13, which lies in the guide curve of the cam plate 5 and follows it when the cam plate 5 is rotated. Accordingly, the other arm and thus the angle lever 12 is pivoted.
Die Figur 4 zeigt eine weitere Ausfuhrungsform der erfmdungsgemaßen Vorrichtung, wobei der Aufbau der Vorrichtung im wesentlichen dem der Ausfuhrungsform gemäß der Figur 3 entspricht, wobei jedoch der Exzenterbolzen 7 durch einen Exzenterbolzen 21 ausgetauscht ist, welcher an seinem einen Ende eine Verzahnung (Zahnrad) hat, welche über einen Zahnriemen 23 mit einem Stellmotor 22 in Verbindung ist. Mittels des Stellmotors 22 wird automatisch der Exzenterbolzen 21 und mit ihm die Lagerung 10a des Winkelhebels 10 verstellt und m Position gehalten.FIG. 4 shows a further embodiment of the device according to the invention, the structure of the device essentially corresponding to that of the embodiment according to FIG. 3, but the eccentric bolt 7 being replaced by an eccentric bolt 21 which has a toothing (gear) at one end which is connected to a servomotor 22 via a toothed belt 23. By means of the servomotor 22, the eccentric bolt 21 and with it the bearing 10a of the angle lever 10 are automatically adjusted and held in the position.
Die Figuren 5a und 5b zeigen eine weitere Ausfuhrungsform der Vorrichtung gemäß der Figur 4, welche einen zusätzlichen Sensor 24 aufweist, der die Werkstoffdicke bzw. den Abstand der Oberfläche des Werkstücks 18 zum Sensor 24 mißt. Entsprechend der Sensordaten wird mittels des nicht dargestellten Stellantriebs 22 der Exzenterbolzen 21 verdreht, wodurch die Verschwenkachse 10a des Winkelhebels 10 relativ zur Stichplatte 19 verschwenkt wird. Das Pleuel 11 dient zum Ausgleich der relativen Bewegungen zwischen dem Winkelhebel 10 und dem Kurvenhebel 12 während der Verstellung entweder des Kurvenhebels 12 oder des Winkelhebels 10 mittels der jeweiligen Einstellvorrichtung .FIGS. 5a and 5b show a further embodiment of the device according to FIG. 4, which has an additional sensor 24 which measures the material thickness or measures the distance between the surface of the workpiece 18 and the sensor 24. In accordance with the sensor data, the eccentric bolt 21 is rotated by means of the actuator 22 (not shown), as a result of which the pivot axis 10a of the angle lever 10 is pivoted relative to the throat plate 19. The connecting rod 11 is used to compensate for the relative movements between the angle lever 10 and the cam lever 12 during the adjustment of either the cam lever 12 or the angle lever 10 by means of the respective adjusting device.
In nicht dargestellten Ausführungsformen ist die Lagerung bzw. die Verschwenkachse des Winkelhebels nicht um eine Achse herum verschwenkbar gelagert, sondern wird linear, manuell oder mittels eines Antriebs verfahren und in der geforderten Position arretiert. Es ist zudem denkbar, daß die Lagerung bzw. die Verschwenkachse auf beliebigen Bahnen verfahrbar und arretierbar ist.In embodiments that are not shown, the mounting or the pivoting axis of the angle lever is not pivotably supported about an axis, but is moved linearly, manually or by means of a drive and locked in the required position. It is also conceivable that the bearing or the pivot axis can be moved and locked on any tracks.
Die Figur 6 zeigt eine Mehrkopf-Stickmaschine mit einem zentralen Antrieb 24, der über eine Welle 27 und Zahnriemen 23 die Exzenterbolzen 21 der einzelnen Stickköpfe 4 der Maschine antreibt, wodurch eine Höheneinstellung der Stoffdrücker gleichzeitig für alle Stickköpfe durchgeführt werden kann. Da sämtliche Stickköpfe meist identische Stickmuster sticken, genügt es, den Abstand der Stickgutoberfläche zur Stichplatte lediglich an einem Stickkopf bzw. Stickmuster zu bestimmten, um anhand des ermittelten Abstandes die Höheneinstellung für alle Stickköpfe gleichzeitig vorzunehmen. In einer nicht dargestellten Ausführungsform sind Kupplungen zwischen der Welle 27 und den Exzenterbolzen 21 vorgesehen, so daß die Höhenverstellung bestimmter Stickköpfe 4 je nach Bedarf wahlweise aus- bzw. einschaltbar ist. So werden bei Mehrkopf- Stickmasch en z.B. bedingt durch die Stickmustergroße oft nur bestimmte Stickkopfe wie z.B. jeder zweite, dritte, etc. Stickkopf benotigt. Die übrigen Stickkopfe werden von der Hauptantriebswelle getrennt. In diesem Fall können durch die Kupplungen die Stoffdrucker der nicht benotigten Stickkopfe abgeschaltet werden. FIG. 6 shows a multi-head embroidery machine with a central drive 24, which drives the eccentric bolts 21 of the individual embroidery heads 4 of the machine via a shaft 27 and toothed belt 23, as a result of which a height adjustment of the fabric presser can be carried out simultaneously for all embroidery heads. Since all embroidery heads mostly embroider identical embroidery patterns, it is sufficient to determine the distance from the surface of the embroidery material to the stitch plate only on one embroidery head or embroidery pattern in order to carry out the height adjustment for all embroidery heads at the same time based on the determined distance. In an embodiment, not shown, couplings are provided between the shaft 27 and the eccentric bolts 21, so that the height adjustment of certain embroidery heads 4 can optionally be or can be switched on. In the case of multi-head embroidery machines, for example, due to the size of the embroidery pattern, only certain embroidery heads, such as every second, third, etc. embroidery head, are often required. The remaining embroidery heads are separated from the main drive shaft. In this case, the couplings can switch off the fabric printers of the embroidery heads that are not required.

Claims

P a te n tan sp rü che P a te n tan
1. Vorrichtung zum Einstellen einer Abfangeinrichtung eines Stoffdrückers (16) einer Näh- oder Stickmaschine, wobei eine Nadelstange (17) den Stoffdrücker (16) unter Zwischenschaltung einer Feder (F) in Richtung einer Stichplatte (19) bewegt und die Abfangvorrichtung den Stoffdrücker (16) vor dem Auftreffen auf das zu bearbeitende Werkstück (18) mittels eines Abfangelementes (10) der1. Device for setting a catcher of a presser (16) of a sewing or embroidery machine, wherein a needle bar (17) moves the presser (16) with the interposition of a spring (F) in the direction of a needle plate (19) and the catcher pushes the presser ( 16) before hitting the workpiece to be machined (18) by means of a catch element (10)
Abfangeinrichtung abfängt und dessen Bewegung bis zum Auftreffen auf das Werkstück (18) steuert, wobei das Abfangelement (10) zusammen mit der NadelstangeInterception device intercepts and controls its movement until it hits the workpiece (18), the interception element (10) together with the needle bar
(17) von einem gemeinsamen Antrieb angetrieben ist, da du r ch ge ke n n z e i chn e t , daß die Position der Lagerung des Abfangelementes (10) relativ zur Stichplatte (19) veränderbar ist.(17) is driven by a common drive, since the position of the support element (10) can be changed relative to the throat plate (19).
2. Vorrichtung nach dem Oberbegriff des Anspruch 1, da du r ch ge k e n n z e i ch n e t , daß das Abfangelement (10) ein auf einer Achse (10a) verschwenkbar an der Nähmaschine gelagerter Winkelhebel ist, und daß die Lage der Achse (10a) relativ zur Stichplatte (19) veränderbar ist. 2. Device according to the preamble of claim 1, since you r ch ge kennzei ch net that the interception element (10) on an axis (10a) pivotally mounted on the sewing machine angle lever, and that the position of the axis (10a) relative to the throat plate (19) is changeable.
3. Vorrichtung nach Anspruch 1 oder 2, da du r ch g e k e n n z e i c hn e t , daß die Lagerung bzw. die Achse (10a) in mindestens zwei Positionen relativ zur Stichplatte (19) arretierbar ist.3. Apparatus according to claim 1 or 2, since you r ch g e k e n n z e i c hn e t that the bearing or the axis (10a) can be locked in at least two positions relative to the needle plate (19).
4. Vorrichtung nach einem der Ansprüche 1 bis 3, d a d u r c h g e k e n n z e i c h n e t , daß die4. Device according to one of claims 1 to 3, d a d u r c h g e k e n n z e i c h n e t that the
Lagerung bzw. die Achse ,10a) mittels eines Antriebs (22) relativ zur Stichplatte (19) verfahrbar ist.Bearing or the axis 10a) can be moved relative to the throat plate (19) by means of a drive (22).
5. Vorrichtung nach einem der vorherigen Ansprüche, da du r ch g e k e n n z e i chn e t , daß die5. Device according to one of the preceding claims, since you r ch g e k e n n z e i chn e t that the
Bewegung des Abfangelementes (10) von einem in Abhängigkeit vom Nadelstangenantrieb angetriebenen Steuernocken (5) gesteuert ist.Movement of the interception element (10) is controlled by a control cam (5) driven as a function of the needle bar drive.
6. Vorrichtung nach Anspruch 5, d a d u r c h g e k e n n z e i c h n e t , daß zwischen einem von dem Steuernocken (5) bewegten Kurvenhebel (12) und dem Abfangelement (10) ein Ausgleichselement insbesondere ein Pleuel (11) zwischengeschaltet ist.6. The device according to claim 5, d a d u r c h g e k e n n z e i c h n e t that between a control lever (5) moving cam lever (12) and the interception element (10), a compensating element, in particular a connecting rod (11) is interposed.
7. Vorrichtung nach Anspruch 6, d a d u r c h g e k e n n z e i c h n e t , daß der Kurvenhebel (12) ein Winkelhebel ist, welcher um eine Achse (2a) verschwenkbar an der Nähmaschine gelagert ist, wobei die Position der Achse (2a) mittels einer Einsteilvorrichtung (2) relativ zur Achse (4a) des Steuernockens (5) veränderbar und mittels einer Arretierungsvorrichtung (1) insbesondere einer Arretierungsschraube in verschiedenen Positionen arretierbar ist.7. The device according to claim 6, characterized in that the cam lever (12) is an angle lever which is pivotally mounted about an axis (2a) on the sewing machine, the position of the axis (2a) by means of an adjusting device (2) relative to the axis (4a) of the control cam (5) is changeable and can be locked in different positions by means of a locking device (1), in particular a locking screw.
8. Vorrichtung nach einem der vorherigen Ansprüche, da du r ch g e k e n n z e i c hn e t , daß die die Achse (10a) bildende Lagerung des Abfangelements (10) achsparallel zur Rotationsachse eines Rotationskörpers (7) angeordnet und mit diesem fest verbunden ist, wobei der Rotationskörper (7) drehbar an der Nähmaschine gelagert und durch Verdrehen des Rotationskörpers (7) die Position der Lagerung relativ zur Stichplatte (19) einstellbar ist.8. Device according to one of the preceding claims, since you r ch gekennzeic hn et that the the bearing (10) forming the axis (10a) is arranged axially parallel to the axis of rotation of a rotating body (7) and is fixedly connected to the latter, the rotating body (7) being rotatably mounted on the sewing machine and the position of the rotating body (7) being rotated Storage relative to the throat plate (19) is adjustable.
9. Vorrichtung nach Anspruch 8, da du r c h ge k e nn z e i ch n e t , daß der Rotationskörper (7) mittels eines Arretierungselements (6) insbesondere einer Feststellschraube in einer bestimmten Position arretierbar ist.9. The device according to claim 8, since you r c h ge k e nn z e i ch n e t that the rotary body (7) by means of a locking element (6) in particular a locking screw can be locked in a certain position.
10. Vorrichtung nach Anspruch 9, d a du r c h ge k e nn z e i chn e t , daß der Rotationskörper (7) mittels eines Antriebs (22) verdrehbar und in mindestens einer Position haltbar und/oder arretierbar ist.10. The device according to claim 9, so that the rotary body (7) can be rotated by means of a drive (22) and can be held and / or locked in at least one position.
11. Vorrichtung nach einem der Ansprüche 1 bis 7, d a d u r c h g e k e n n z e i c h n e t , daß die Achse (10a) des Abfangelements (10) linear mittels des Antriebs verfahrbar und in mindestens einer Position haltbar und/oder arretierbar ist.11. The device according to one of claims 1 to 7, that the axis (10a) of the intercepting element (10) can be moved linearly by means of the drive and can be held and / or locked in at least one position.
12. Vorrichtung nach einem der vorherigen Ansprüche, da du r ch g e k e n n z e i c hn e t , daß der Antrieb (22) ein Schrittmotor ist.12. Device according to one of the preceding claims, since you r ch g e k e n n z e i c hn e t that the drive (22) is a stepper motor.
13. Vorrichtung nach einem der vorherigen Ansprüche, da du r ch ge k e nn z e i c h n e t , daß eine Steuerung mittels mindestens eines Sensors (24) die Werkstückdicke in der Nähe mindestens eines Stoffdrückers (16) ermittelt und mittels des Antriebs (22) die für die ermittelte Werkstuckdicke erforderliche Lage des Abfangelementes (10) einstellt oder einregelt.13. Device according to one of the preceding claims, since you r ch ge ke nn records that a control by means of at least one sensor (24) determines the workpiece thickness in the vicinity of at least one presser (16) and by means of Drive (22) sets or adjusts the position of the interception element (10) required for the determined workpiece thickness.
14. Vorrichtung nach Anspruch 13, da d r ch g e k e n n z e i c h n e t , daß die Steuerung wahrend des Nahvorganges kontinuierlich oder in vorbestimmbaren Zeitmtervallen die erforderliche Lage des Abfangelementes (10) anhand der ermittelten Werkstuckdicke einstellt oder einregelt.14. The apparatus according to claim 13, since the control means that the controller continuously adjusts or adjusts the required position of the interception element (10) on the basis of the determined workpiece thickness during the close-up process or at predeterminable time intervals.
15. Vorrichtung nach einem der vorherigen Ansprüche, d a du r c h ge k e n n z e i c h n e t , daß die15. The device according to any one of the preceding claims, that a d e r c h ge k e n n z e i c h n e t that the
Hohenemstellung der Stoffdrucker (16) der Stickkopfe (4) durch einen gemeinsamen Antrieb (24) erfolgt .Height adjustment of the fabric printer (16) of the embroidery heads (4) is carried out by a common drive (24).
16. Vorrichtung nach Anspruch 15, da du r c h g e k e n n z e i ch n e t , daß eine gemeinsame Welle (27) den Antrieb (24) mit den Verstellmitteln zum Bewegen bzw. verfahren der Lagerung bzw. der Achse (10a) verbindet.16. The apparatus of claim 15, since you r c h g e k e n n z e i ch n e t that a common shaft (27) connects the drive (24) with the adjusting means for moving or moving the bearing or the axis (10 a).
17. Vorrichtung nach Anspruch 16, da du r c h g e k e nn z e i c h n e t , daß mindestens eine Kupplung zwischen der Welle (27) und jeder Lagerung bzw. jeder Achse (10a) angeordnet ist. 17. The apparatus of claim 16, since you r c h g e k e nn z e i c h n e t that at least one coupling between the shaft (27) and each bearing or each axis (10a) is arranged.
EP00907574A 1999-04-21 2000-02-17 Device for adjusting the checking unit of a presser foot used in a sewing and/or embroidery machine Expired - Lifetime EP1171662B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19918169 1999-04-21
DE19918169A DE19918169A1 (en) 1999-04-21 1999-04-21 Presser foot on sewing or embroidery machine has interceptor to limit pressure with adjustment for distance relative to needle plate
PCT/EP2000/001280 WO2000063480A1 (en) 1999-04-21 2000-02-17 Device for adjusting the checking unit of a presser foot used in a sewing and/or embroidery machine

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EP1171662A1 true EP1171662A1 (en) 2002-01-16
EP1171662B1 EP1171662B1 (en) 2003-05-02

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US (1) US6591769B1 (en)
EP (1) EP1171662B1 (en)
AU (1) AU2911700A (en)
DE (2) DE19918169A1 (en)
TR (1) TR200103031T2 (en)
WO (1) WO2000063480A1 (en)

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AU2911700A (en) 2000-11-02
DE19918169A1 (en) 2000-10-26
US6591769B1 (en) 2003-07-15
DE50001980D1 (en) 2003-06-05
WO2000063480A1 (en) 2000-10-26
TR200103031T2 (en) 2002-02-21
EP1171662B1 (en) 2003-05-02

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