EP2058426B1 - Sewing machine - Google Patents

Sewing machine Download PDF

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Publication number
EP2058426B1
EP2058426B1 EP08018718A EP08018718A EP2058426B1 EP 2058426 B1 EP2058426 B1 EP 2058426B1 EP 08018718 A EP08018718 A EP 08018718A EP 08018718 A EP08018718 A EP 08018718A EP 2058426 B1 EP2058426 B1 EP 2058426B1
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EP
European Patent Office
Prior art keywords
adjustment
sewing machine
housing
machine according
presser foot
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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.)
Ceased
Application number
EP08018718A
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German (de)
French (fr)
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EP2058426A1 (en
Inventor
Andreas Oberndörfer
Thomas Jordan
Horst Bohl
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Duerkopp Adler AG
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Duerkopp Adler AG
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Publication of EP2058426A1 publication Critical patent/EP2058426A1/en
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B29/00—Pressers; Presser feet
    • D05B29/02—Presser-control devices
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B29/00—Pressers; Presser feet

Definitions

  • the invention relates to a sewing machine according to the preamble of claim 1.
  • Such a sewing machine is known from the DE 2 349 290 A .
  • Other sewing machines with adjustable presser foot biasing force are known from the GB-A-111 022 , of the DD-PS 53 542 , of the DD-PS 35,150 and the GB 2 068 027 A .
  • Other sewing machines with adjustable presser foot biasing force are known through public prior use.
  • the adjustment of the presser foot biasing force is in the known sewing machines still in need of improvement. Problems occur in particular in the reproducibility of the preload force, in the precision of the preload adjustment and in the readability of the set preload force. In addition, the adjustment of the biasing force is often cumbersome and requires the use of additional tools in some of the known sewing machines.
  • the radius change is monotone in the mathematical sense.
  • the invention monotonous radius change results in a clear assignment of the biasing force to the position of the actuator. This ensures a very accurate preload force adjustment.
  • the radius change can be continuous or discontinuous.
  • a discontinuous radius change may include multiple radius stages. As a rule, the radius change between the minimum and the maximum radius is strictly monotone.
  • the embodiment according to the invention makes it possible to set over the setting angle range easily readable biasing force markers, for example in the form of a digit or stroke scale.
  • the leaf spring according to the invention is a force spring, which has proven itself for the specification of a presser foot biasing force. Characterized in that the adjusting body for influencing the biasing force directly, so not imparting intermediary other components, applied to the power source, a sensitive adjustment of the biasing force is possible. An additional expense performing mechanism between the actuator and the leaf spring deleted. The adjustment of the preload force is simplified.
  • a course of the jacket wall of the actuator according to claim 2 allows a continuous biasing force specification. Leaves over the spiral course For example, a progression of the increase of the biasing force over the adjusting angle range produce.
  • An adjusting wheel according to claim 3 allows a convenient operation of the adjustment.
  • the setting wheel may have the already mentioned scaling, which cooperates with a housing-side marking for displaying the set biasing force.
  • a fixing unit according to claim 4 allows a well reproducible and not undesirable adjusting biasing force specification.
  • an embodiment of the fixing unit according to claim 5 leads to a particularly comfortable operation.
  • Various preload specifications can be set by clicking the latch unit.
  • the latching body may be mounted in the housing, wherein the latching recess is then embodied in the setting wheel, or may also be mounted in the setting wheel, wherein the latching recess is then embodied in the housing.
  • a radius ratio according to claim 8 allows coverage between minimum and maximum biasing force well adapted to the operating requirements of a sewing machine.
  • a sewing machine 1 of which in the Fig. 1 an upper part and a portion of a base plate are shown, has a stand 2 and an angle thereof extending horizontally extending arm 3. The latter ends in a head 4.
  • the stator 2, the arm 3, the head 4 and the base plate are of a housing 5 of Surround sewing machine 1.
  • an arm shaft not shown in the drawing is rotatably mounted. This drives in the head 4 via a crank drive in the head 4 axially slidably mounted, also not shown needle bar.
  • a needle attached to the lower end of the needle bar is movable up and down on a vertical axis 6 by the crank mechanism.
  • the needle leads in an eye from a needle, also not shown needle needle for sewing two superimposed pieces 7, 8 of fabric.
  • the Nähgut Swisse 7, 8 are during sewing by the sewing machine 1 on a support plate 9 (see. Fig. 2 ).
  • the support plate 9 has a not-shown stitch hole.
  • a presser foot 10 For fixing the Nähgut thoroughlye 7, 8 during sewing is a presser foot 10. This has a foot 11, which presses on the Nähgut thoroughlye 7, 8 from above.
  • the foot part 11 is fastened via a screw 12 to a fabric pressing rod 13.
  • the latter is guided in a guide bush 14 in the head 4 along a pusher axis 15, which runs parallel to the needle bar axis 6.
  • a power source 16 in the form of a leaf spring is used.
  • the leaf spring 16 is supported on the one hand with an end portion 16a on a housing-fixed abutment 17 and is pivotable about a pivot axis 18 there.
  • the leaf spring 16 is supported with an end portion 16 b at a free upper end 19 of the fabric pressing rod 13.
  • the leaf spring 16 extends in the arm 3 substantially horizontally.
  • the upper end 19 of the fabric pressing rod 13 is formed hemispherical in the area of contact of the leaf spring 16, so that the leaf spring 16 is applied to the fabric presser rod 13 defined.
  • an adjusting device 20 (see. Fig. 3 ).
  • the latter has a control body 21, which is rotatably or pivotably mounted in the housing 5 about an actuating shaft 22, with which the actuating body 21 is rotatably connected and which defines a pivot axis 23.
  • the actuator body 21 for influencing the biasing force on the leaf spring 16 between the two end portions 16a, 16b in the Fig. 2 and 3 from above.
  • a measured from the pivot axis 23 of radius R of the jacket wall 24 has a set angle range 25 about the pivot axis 23 a continuously and strictly monotonically changing course. In the execution, in the Fig. 2 and 3 is shown, this course is spiral.
  • the adjusting angle range 25 is about 270 °.
  • other adjusting angle ranges are possible, in particular those which are greater than 180 °.
  • the adjusting angle range can, for example, in a helical configuration of the jacket wall of the actuating body, be greater than 360 °.
  • a radius R of the jacket wall 24 varies between a minimum radius R min and a maximum radius R max .
  • the ratio R max / P min is about 3.
  • other ratios R max / R min are possible, in particular a ratio which is greater than 2.
  • actuating body 21 To actuate the actuating body 21 from an outer side of the housing serves an adjusting wheel 26. This is mechanically connected to the actuating body 21 for pivoting about this about the pivot axis 22. In the execution after Fig. 3 is the thumbwheel 26 via a central screw 27 which is coaxial with the actuating shaft 22, screwed to the control shaft 22.
  • the locking unit 29 has a locking body 29 designed as a ball.
  • the locking body 29 is supported by a coil spring 30, which is supported against the bottom of a blind hole 31, in the Fig. 3 biased to the right. against falling out From the blind hole 31 of the locking body 29 is retained by a retaining sleeve 32 which is fixed in the blind hole 32.
  • the latching body 29 acts in a latching position of the fixing unit 28, which in the Fig. 3 is shown, with a complementary to the locking body 29 formed recess 33 in the control wheel 26 together.
  • the setting wheel 26 has a plurality of such recesses 33, the equally distributed sweep the adjustment angle range 25. For example, two, three, four, five or more ten, for example up to fifty, such recesses 33 may be provided in the adjusting wheel 26.
  • the biasing force of the presser foot 10 is adjusted by means of the adjusting device 20 as follows: Depending on the type and thickness of the sewing material pieces 7, 8 to be sewn, the user of a table takes the pretensioning force to be set. This biasing force is assigned, for example, a number, which in turn is mounted on the user-facing side of the adjusting wheel 26 in the region of the associated recess 33. The user then twists the setting wheel 26 until this digit of a positioning mark 34 (see FIG. Fig. 1 ), which is attached to the housing 5 adjacent to the setting wheel 26, opposite. In this case, the user feels intermediate latching positions of the setting wheel 26 as a single clicks, wherein the locking body 29 in the respective recess 33 on and out of this again.
  • the locking body 29 moves into the in the Fig. 3 illustrated locking position 1 and the setting wheel 26 is fixed in the predetermined position.
  • the jacket wall 24 is located at a predetermined radius, which is usually between R min and R max , on the leaf spring 16, bends them defined and thus spans them according to the vortex Preload force, so that the presser rod 13 and thus also the foot part 11 of the presser foot 10 with this predetermined biasing force when sewing against the Nähgut Publishede 7, 8 presses.

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

Description

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

Eine derartige Nähmaschine ist bekannt aus der DE 2 349 290 A . Weitere Nähmaschinen mit einstellbarer Drückerfuß-Vorspannkraft sind bekannt aus der GB-A-111 022 , der DD-PS 53 542 , der DD-PS 35 150 und der GB 2 068 027 A . Weitere Nähmaschinen mit einstellbarer Drückerfuß-Vorspannkraft sind durch offenkundige Vorbenutzung bekannt.Such a sewing machine is known from the DE 2 349 290 A , Other sewing machines with adjustable presser foot biasing force are known from the GB-A-111 022 , of the DD-PS 53 542 , of the DD-PS 35,150 and the GB 2 068 027 A , Other sewing machines with adjustable presser foot biasing force are known through public prior use.

Die Einstellung der Drückerfuß-Vorspannkraft ist bei den bekannten Nähmaschinen noch verbesserungsbedürftig. Probleme treten insbesondere bei der Reproduzierbarkeit der Vorspannkraft, bei der Präzision der Vorspannkraft-Einstellung und bei der Ablesbarkeit der eingestellten Vorspannkraft auf. Zudem ist die Einstellung der Vorspannkraft oftmals mühselig und erfordert bei einigen der bekannten Nähmaschinen die Verwendung zusätzlichen Werkzeugs.The adjustment of the presser foot biasing force is in the known sewing machines still in need of improvement. Problems occur in particular in the reproducibility of the preload force, in the precision of the preload adjustment and in the readability of the set preload force. In addition, the adjustment of the biasing force is often cumbersome and requires the use of additional tools in some of the known sewing machines.

Es ist daher eine Aufgabe der vorliegenden Erfindung, eine Nähmaschine der eingangs genannten Art derart weiterzubilden, dass die Einstellung der Drückerfuß-Vorspannkraft sicherer und komfortabler erfolgt.It is therefore an object of the present invention, a sewing machine of the type mentioned in such a way that the setting of the presser foot biasing force is safer and more comfortable.

Diese Aufgabe ist erfindungsgemäß gelöst durch eine Nähmaschine mit dem im Anspruch 1 angegebenen Merkmalen.This object is achieved by a sewing machine with the features specified in claim 1.

Erfindungsgemäß wurde erkannt, dass durch eine Einstelleinrichtung mit einem Stellkörper, der über eine Mantelwand mit sich änderndem Radius mit der Kraftquelle zur Erzeugung der Vorspannkraft zusammenwirkt, eine präzise Vorspannkraft-Vorgabe möglich ist, die insbesondere mit kurzen Stellwegen auskommt. Die Radiusänderung ist dabei im mathematischen Sinn monoton. Die erfindungsgemäß monotone Radiusänderung ergibt eine eindeutige Zuordnung der Vorspannkraft zur Stellung des Stellkörpers. Hierdurch ist eine sehr genaue Vorspannkrafteinstellung gewährleistet. Die Radiusänderung kann kontinuierlich oder diskontinuierlich sein. Erfindungsgemäß monoton ist auch ein progressiver oder auch ein degressiver Verlauf der Radiusänderung über den Stellwinkelbereich. Eine diskontinuierliche Radiusänderung kann beispielsweise mehrere Radiusstufen beinhalten. In der Regel ist die Radiusänderung zwischen dem minimalen und dem maximalen Radius streng monoton. Die erfindungsgemäße Ausgestaltung ermöglicht es, über den Stellwinkelbereich gut ablesbare Vorspannkraft-Markierungen, beispielsweise in Form einer Ziffern- oder Strich-Skalierung, zu setzen. Die erfindungsgemäße Blattfeder ist eine Kraftfeder, die sich zur Vorgabe einer Drückerfuß-Vorspannkraft bewährt hat. Dadurch, dass der Stellkörper zur Beeinflussung der Vorspannkraft direkt, also nicht über vermittelnde weitere Komponenten, an der Kraftquelle anliegt, ist eine feinfühlige Verstellung der Vorspannkraft möglich. Eine Zusatzaufwand darstellende Mechanik zwischen dem Stellkörper und der Blattfeder entfällt. Die Einstellung der Vorspannkraft ist vereinfacht.According to the invention, it has been recognized that by means of an adjusting device having a setting body which interacts with the power source via a jacket wall of varying radius to produce the biasing force, a precise pretensioning force specification is possible, which in particular manages with short travel ranges. The radius change is monotone in the mathematical sense. The invention monotonous radius change results in a clear assignment of the biasing force to the position of the actuator. This ensures a very accurate preload force adjustment. The radius change can be continuous or discontinuous. According to the invention is also a progressive or a degressive course of the radius change over the adjustment angle range. For example, a discontinuous radius change may include multiple radius stages. As a rule, the radius change between the minimum and the maximum radius is strictly monotone. The embodiment according to the invention makes it possible to set over the setting angle range easily readable biasing force markers, for example in the form of a digit or stroke scale. The leaf spring according to the invention is a force spring, which has proven itself for the specification of a presser foot biasing force. Characterized in that the adjusting body for influencing the biasing force directly, so not imparting intermediary other components, applied to the power source, a sensitive adjustment of the biasing force is possible. An additional expense performing mechanism between the actuator and the leaf spring deleted. The adjustment of the preload force is simplified.

Ein Verlauf der Mantelwand des Stellkörpers nach Anspruch 2 ermöglicht eine kontinuierliche Vorspannkraft-Vorgabe. Über den Spiralverlauf lässt sich beispielsweise eine Progression der Zunahme der Vorspannkraft über den Stellwinkelbereich erzeugen.A course of the jacket wall of the actuator according to claim 2 allows a continuous biasing force specification. Leaves over the spiral course For example, a progression of the increase of the biasing force over the adjusting angle range produce.

Ein Stellrad nach Anspruch 3 erlaubt eine bequeme Bedienung der Einstelleinrichtung. Das Stellrad kann die bereits erwähnte Skalierung aufweisen, die mit einer gehäuseseitigen Markierung zur Anzeige der eingestellten Vorspannkraft zusammenwirkt.An adjusting wheel according to claim 3 allows a convenient operation of the adjustment. The setting wheel may have the already mentioned scaling, which cooperates with a housing-side marking for displaying the set biasing force.

Eine Fixiereinheit nach Anspruch 4 ermöglicht eine gut reproduzierbare und sich nicht unerwünscht verstellende Vorspannkraft-Vorgabe. Eine Fixierung beispielsweise über eine umständlich handzuhabende Kontermutter entfällt.A fixing unit according to claim 4 allows a well reproducible and not undesirable adjusting biasing force specification. A fixation for example on a cumbersome to handle counter nut deleted.

Eine Ausgestaltung der Fixiereinheit nach Anspruch 5 führt zu einer besonders komfortablen Bedienung. Verschiedene Vorspannkraft-Vorgaben können über die Rasteinheit klickweise eingestellt werden. Je nach der Ausgestaltung der Rasteinheit kann der Rastkörper im Gehäuse gelagert sein, wobei die Rastausnehmung dann im Stellrad ausgeführt ist, oder auch im Stellrad gelagert sein, wobei die Rastausnehmung dann im Gehäuse ausgeführt ist.An embodiment of the fixing unit according to claim 5 leads to a particularly comfortable operation. Various preload specifications can be set by clicking the latch unit. Depending on the configuration of the latching unit, the latching body may be mounted in the housing, wherein the latching recess is then embodied in the setting wheel, or may also be mounted in the setting wheel, wherein the latching recess is then embodied in the housing.

Stellwinkelbereiche nach den Ansprüchen 6 und 7 ermöglichen eine feine Vorspannkraft-Vorgabe.Stellwinkelbereiche according to claims 6 and 7 allow a fine biasing force specification.

Ein Radiusverhältnis nach Anspruch 8 ermöglicht eine Abdeckung zwischen minimaler und maximaler Vorspannkraft, die an die Betriebsanforderungen einer Nähmaschine gut angepasst ist.A radius ratio according to claim 8 allows coverage between minimum and maximum biasing force well adapted to the operating requirements of a sewing machine.

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

Fig. 1
eine Seitenansicht eines Oberteils einer Nähmaschine;
Fig. 2
schematisch einen vertikalen Längsschnitt im Kopfbereich der Nähmaschine nach Fig. 1, wobei ausschließlich Komponenten dargestellt sind, die mit einem Drückerfuß der Nähmaschine zusammenwirken; und
Fig. 3
einen Schnitt gemäß Linie III-III in Fig. 1.
An embodiment of the invention will be explained in more detail with reference to the drawing. In this show:
Fig. 1
a side view of an upper part of a sewing machine;
Fig. 2
schematically a vertical longitudinal section in the head region of the sewing machine after Fig. 1 , wherein only components are shown, which cooperate with a presser foot of the sewing machine; and
Fig. 3
a section along line III-III in Fig. 1 ,

Eine Nähmaschine 1, von der in der Fig. 1 ein Oberteil und ausschnittsweise eine Grundplatte dargestellt sind, hat einen Ständer 2 und einen sich hiervon abgewinkelt horizontal erstreckenden Arm 3. Letzterer endet in einem Kopf 4. Der Ständer 2, der Arm 3, der Kopf 4 sowie die Grundplatte sind von einem Gehäuse 5 der Nähmaschine 1 umgeben. Im Arm 3 ist eine in der Zeichnung nicht dargestellte Armwelle drehbar gelagert. Diese treibt im Kopf 4 über einen Kurbeltrieb eine im Kopf 4 axial verschiebbar gelagerte, ebenfalls nicht dargestellte Nadelstange an. Eine am unteren Ende der Nadelstange angebrachte Nadel ist durch den Kurbeltrieb auf einer vertikalen Achse 6 auf- und abbewegbar. Die Nadel führt in einem Öhr einen von einer ebenfalls nicht dargestellten Spule zugeführten Nadelfadel zum Vernähen zweier übereinandergelegter Stücke 7, 8 von Nähgut.A sewing machine 1, of which in the Fig. 1 an upper part and a portion of a base plate are shown, has a stand 2 and an angle thereof extending horizontally extending arm 3. The latter ends in a head 4. The stator 2, the arm 3, the head 4 and the base plate are of a housing 5 of Surround sewing machine 1. In arm 3, an arm shaft, not shown in the drawing is rotatably mounted. This drives in the head 4 via a crank drive in the head 4 axially slidably mounted, also not shown needle bar. A needle attached to the lower end of the needle bar is movable up and down on a vertical axis 6 by the crank mechanism. The needle leads in an eye from a needle, also not shown needle needle for sewing two superimposed pieces 7, 8 of fabric.

Die Nähgutstücke 7, 8 liegen beim Vernähen durch die Nähmaschine 1 auf einer Auflageplatte 9 auf (vgl. Fig. 2). Die Auflageplatte 9 hat ein nicht näher dargestelltes Stichloch.The Nähgutstücke 7, 8 are during sewing by the sewing machine 1 on a support plate 9 (see. Fig. 2 ). The support plate 9 has a not-shown stitch hole.

Zum Fixieren der Nähgutstücke 7, 8 während des Vernähens dient ein Drückerfuß 10. Dieser hat ein Fußteil 11, das von oben her auf die Nähgutstücke 7, 8 drückt. Das Fußteil 11 ist über eine Schraube 12 an einer Stoffdrückerstange 13 befestigt. Letztere ist in einer Führungsbuchse 14 im Kopf 4 längs einer Drückerachse 15 geführt, die parallel zur Nadelstangenachse 6 verläuft.For fixing the Nähgutstücke 7, 8 during sewing is a presser foot 10. This has a foot 11, which presses on the Nähgutstücke 7, 8 from above. The foot part 11 is fastened via a screw 12 to a fabric pressing rod 13. The latter is guided in a guide bush 14 in the head 4 along a pusher axis 15, which runs parallel to the needle bar axis 6.

Zur Vorgabe einer Druckkraft, mit der der Drückerfuß 10 beim Vernähen die Nähgutstücke 7, 8 fixiert, dient eine Kraftquelle 16 in Form einer Blattfeder. Die Blattfeder 16 stützt sich einerseits mit einem Endabschnitt 16a an einem gehäusefesten Widerlager 17 ab und ist dort um eine Schwenkachse 18 verschwenkbar. Andererseits stützt sich die Blattfeder 16 mit einem Endabschnitt 16b an einem freien oberen Ende 19 der Stoffdrückerstange 13 ab. Die Blattfeder 16 verläuft im Arm 3 im Wesentlichen horizontal.To specify a pressure force with which the presser foot 10 fixes the sewing material pieces 7, 8 during sewing, a power source 16 in the form of a leaf spring is used. The leaf spring 16 is supported on the one hand with an end portion 16a on a housing-fixed abutment 17 and is pivotable about a pivot axis 18 there. On the other hand, the leaf spring 16 is supported with an end portion 16 b at a free upper end 19 of the fabric pressing rod 13. The leaf spring 16 extends in the arm 3 substantially horizontally.

Das obere Ende 19 der Stoffdrückerstange 13 ist im Bereich der Anlage der Blattfeder 16 halbkugelig ausgeformt, so dass die Blattfeder 16 definiert an der Stoffdrückerstange 13 anliegt.The upper end 19 of the fabric pressing rod 13 is formed hemispherical in the area of contact of the leaf spring 16, so that the leaf spring 16 is applied to the fabric presser rod 13 defined.

Zur Vorgabe einer Vorspannkraft, mit der der Drückerfuß 10 mit der Blattfeder 16 zusammenwirkt, dient eine Einstelleinrichtung 20 (vgl. Fig. 3). Letztere hat einen Stellkörper 21, der um eine Stellwelle 22, mit der der Stellkörper 21 drehfest verbunden ist und die eine Schwenkachse 23 vorgibt, drehbar bzw. verschwenkbar im Gehäuse 5 gelagert ist. Der Stellkörper 21 hat eine eine Stellkurve vorgebende Mantelwand 24. Über letztere liegt der Stellkörper 21 zur Beeinflussung der Vorspannkraft an der Blattfeder 16 zwischen deren beiden Endabschnitten 16a, 16b in den Fig. 2 und 3 von oben her an.To specify a biasing force with which the presser foot 10 cooperates with the leaf spring 16, an adjusting device 20 (see. Fig. 3 ). The latter has a control body 21, which is rotatably or pivotably mounted in the housing 5 about an actuating shaft 22, with which the actuating body 21 is rotatably connected and which defines a pivot axis 23. About the latter is the actuator body 21 for influencing the biasing force on the leaf spring 16 between the two end portions 16a, 16b in the Fig. 2 and 3 from above.

Ein von der Schwenkachse 23 aus gemessener Radius R der Mantelwand 24 hat in einem Stellwinkelbereich 25 um die Schwenkachse 23 einen sich kontinuierlich und streng monoton ändernden Verlauf. In der Ausführung, die in den Fig. 2 und 3 dargestellt ist, ist dieser Verlauf spiralförmig.A measured from the pivot axis 23 of radius R of the jacket wall 24 has a set angle range 25 about the pivot axis 23 a continuously and strictly monotonically changing course. In the execution, in the Fig. 2 and 3 is shown, this course is spiral.

Der Stellwinkelbereich 25 beträgt etwa 270 °. Je nach Ausführung des Stellkörpers 21 sind auch andere Stellwinkelbereiche möglich, insbesondere solche, die größer sind als 180 °. Der Stellwinkelbereich kann, beispielsweise bei einer wendelförmigen Ausgestaltung der Mantelwand des Stellkörpers, auch größer sein als 360 °.The adjusting angle range 25 is about 270 °. Depending on the design of the actuating body 21, other adjusting angle ranges are possible, in particular those which are greater than 180 °. The adjusting angle range can, for example, in a helical configuration of the jacket wall of the actuating body, be greater than 360 °.

Im Stellwinkelbereich 25 variiert ein Radius R der Mantelwand 24 zwischen einem Minimalradius Rmin und einem Maximalradius Rmax. Bei der dargestellten Ausführung beträgt das Verhältnis Rmax/Pmin etwa 3. Je nach Ausführung sind auch andere Verhältnisse Rmax/Rmin möglich, insbesondere ein Verhältnis, das größer ist als 2.In the adjustment angle range 25, a radius R of the jacket wall 24 varies between a minimum radius R min and a maximum radius R max . In the illustrated embodiment, the ratio R max / P min is about 3. Depending on the design, other ratios R max / R min are possible, in particular a ratio which is greater than 2.

Zur Betätigung des Stellkörpers 21 von einer Gehäuseaußenseite her dient ein Stellrad 26. Dieses ist mit dem Stellkörper 21 zum Verschwenken von diesem um die Schwenkachse 22 mechanisch verbunden. In der Ausführung nach Fig. 3 ist das Stellrad 26 über eine zentrale Schraube 27, die koaxial zur Stellwelle 22 verläuft, mit der Stellwelle 22 verschraubt.To actuate the actuating body 21 from an outer side of the housing serves an adjusting wheel 26. This is mechanically connected to the actuating body 21 for pivoting about this about the pivot axis 22. In the execution after Fig. 3 is the thumbwheel 26 via a central screw 27 which is coaxial with the actuating shaft 22, screwed to the control shaft 22.

Über eine Fixiereinheit 28 kann das Stellrad 26 relativ zum Gehäuse 5 in mehreren Schwenkwinkel-Fixierstellungen fixiert werden. Die Fixiereinheit 28 hat einen als Kugel ausgeführten Rastkörper 29. Der Rastkörper 29 ist über eine Schraubenfeder 30, die sich gegen den Boden eines Sacklochs 31 abstützt, in der Fig. 3 nach rechts vorgespannt. Gegen ein Herausfallen aus dem Sackloch 31 wird der Rastkörper 29 durch eine Rückhaltebuchse 32, die im Sackloch 32 festgelegt ist, zurückgehalten.Via a fixing unit 28, the setting wheel 26 can be fixed relative to the housing 5 in a plurality of pivoting angle fixing positions. The locking unit 29 has a locking body 29 designed as a ball. The locking body 29 is supported by a coil spring 30, which is supported against the bottom of a blind hole 31, in the Fig. 3 biased to the right. Against falling out From the blind hole 31 of the locking body 29 is retained by a retaining sleeve 32 which is fixed in the blind hole 32.

Der Rastkörper 29 wirkt in einer Raststellung der Fixiereinheit 28, die in der Fig. 3 dargestellt ist, mit einer komplementär zum Rastkörper 29 ausgeformten Rastausnehmung 33 im Stellrad 26 zusammen. In Umfangsrichtung um die Schwenkachse 23 hat das Stellrad 26 eine Mehrzahl derartiger Rastausnehmungen 33, die gleichverteilt den Stellwinkelbereich 25 überstreichen. Es können beispielsweise zwei, drei, vier, fünf oder mehrere zehn, beispielsweise bis zu fünfzig, derartige Rastausnehmungen 33 im Stellrad 26 vorgesehen sein.The latching body 29 acts in a latching position of the fixing unit 28, which in the Fig. 3 is shown, with a complementary to the locking body 29 formed recess 33 in the control wheel 26 together. In the circumferential direction about the pivot axis 23, the setting wheel 26 has a plurality of such recesses 33, the equally distributed sweep the adjustment angle range 25. For example, two, three, four, five or more ten, for example up to fifty, such recesses 33 may be provided in the adjusting wheel 26.

Die Vorspannkraft des Drückerfuß 10 wird mit Hilfe der Einstelleinrichtung 20 folgendermaßen eingestellt: Je nach der Art und der Dicke der zu vernähenden Nähgutstücke 7, 8 entnimmt der Benutzer einer Tabelle die einzustellende Vorspannkraft. Diese Vorspannkraft ist beispielsweise einer Ziffer zugeordnet, die sich wiederum auf der dem Benutzer zugewandten Seite des Stellrades 26 im Bereich der zugehörigen Rastausnehmung 33 angebracht ist. Der Benutzer verdreht dann das Stellrad 26, bis diese Ziffer einer Stellmarkierung 34 (vgl. Fig. 1), die am Gehäuse 5 benachbart zum Stellrad 26 angebracht ist, gegenüberliegt. Dabei fühlt der Benutzer zwischenliegende Rastpositionen des Stellrades 26 als einzelne Klicks, wobei der Rastkörper 29 in die jeweilige Rastausnehmung 33 ein- und aus dieser wieder ausrückt. Wenn die einzustellende Vorspannkraft erreicht ist, rückt der Rastkörper 29 in die in der Fig. 3 dargestellte Raststellung 1 ein und das Stellrad 26 ist in der vorgegebenen Position fixiert. In dieser vorgegebenen Position liegt die Mantelwand 24 mit einem vorgegebenen Radius, der in der Regel zwischen Rmin und Rmax liegt, an der Blattfeder 16 an, biegt diese definiert durch und spannt diese damit entsprechend der vorzugebenden Vorspannkraft vor, so dass die Stoffdrückerstange 13 und somit auch das Fußteil 11 des Drückerfußes 10 mit dieser vorgegebenen Vorspannkraft beim Vernähen gegen die Nähgutstücke 7, 8 drückt.The biasing force of the presser foot 10 is adjusted by means of the adjusting device 20 as follows: Depending on the type and thickness of the sewing material pieces 7, 8 to be sewn, the user of a table takes the pretensioning force to be set. This biasing force is assigned, for example, a number, which in turn is mounted on the user-facing side of the adjusting wheel 26 in the region of the associated recess 33. The user then twists the setting wheel 26 until this digit of a positioning mark 34 (see FIG. Fig. 1 ), which is attached to the housing 5 adjacent to the setting wheel 26, opposite. In this case, the user feels intermediate latching positions of the setting wheel 26 as a single clicks, wherein the locking body 29 in the respective recess 33 on and out of this again. When the biasing force to be set is reached, the locking body 29 moves into the in the Fig. 3 illustrated locking position 1 and the setting wheel 26 is fixed in the predetermined position. In this predetermined position, the jacket wall 24 is located at a predetermined radius, which is usually between R min and R max , on the leaf spring 16, bends them defined and thus spans them according to the vorzugebenden Preload force, so that the presser rod 13 and thus also the foot part 11 of the presser foot 10 with this predetermined biasing force when sewing against the Nähgutstücke 7, 8 presses.

Claims (8)

  1. Sewing machine (1) comprising
    - a housing (5);
    - a support plate (9);
    - a presser foot (10) which cooperates with the support plate (9) for clamping fabric (7, 8);
    - a source of force (16) which is supported on the housing (5) on the one hand and on the presser foot (10) on the other so that the presser foot (10) is preloaded against the support plate (9);
    - an adjustment device (20) for adjusting a preload force exerted on the presser foot (10) by the source of force (16),
    wherein
    - the adjustment device (20) comprises an adjustment body (21) which is mounted in the housing (5) so as to be pivotable about a pivot axis (23);
    characterized in that the adjustment body (21) comprises a surface wall (24),
    -- via which the adjustment body (21) directly abuts against the source of force (16) for influencing the preload force, and
    -- whose radius R changes monotonically between a minimum radius and a larger, maximum radius within an adjustment angle range (25) about the pivot axis (23);
    - wherein the source of force is a leaf spring (16), wherein
    -- a first end portion (16a) of the leaf spring (16) is clamped such as to be locked relative to the housing (5);
    -- an opposite end portion (16b) abuts against an end of a presser bar (13) of the presser foot (10), the end being opposite to a foot member (11) of the presser foot (10);
    -- the surface wall (24) of the adjustment body (21) directly abuts against the leaf spring (16) between the two end portions (16a, 16b).
  2. Sewing machine according to claim 1, characterized in that the surface wall (24) of the adjustment body (21) is spiral-shaped within the adjustment angle range (25).
  3. Sewing machine according to one of claims 1 to 2, characterized by an adjustment wheel (26) provided on an outside of the housing (5), the adjustment wheel (26) being mechanically connected with the adjustment body (21) for pivoting the adjustment body (21).
  4. Sewing machine according to claim 3, characterized by at least one locking unit (28) for locking the adjustment wheel (26) relative to the housing (5) in at least two pivot-angle locking positions.
  5. Sewing machine according to claim 4, characterized in that the locking unit (28) is a latching unit with a preloaded latching body (29) which cooperates with one of at least two latching recesses (33) in the latching positions.
  6. Sewing machine according to one of claims 1 to 5, characterized by an adjustment angle range which is greater than 180°.
  7. Sewing machine according to claim 6, characterized by an adjustment angle range of 270°.
  8. Sewing machine according to one of claims 1 to 7, characterized in that the radius R of the surface wall (24) varies between a minimum radius Rmin and a maximum radius Rmax within the adjustment angle range (25), wherein Rmax / Rmin > 2.
EP08018718A 2007-11-07 2008-10-25 Sewing machine Ceased EP2058426B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007052876A DE102007052876A1 (en) 2007-11-07 2007-11-07 sewing machine

Publications (2)

Publication Number Publication Date
EP2058426A1 EP2058426A1 (en) 2009-05-13
EP2058426B1 true EP2058426B1 (en) 2010-12-29

Family

ID=40379022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08018718A Ceased EP2058426B1 (en) 2007-11-07 2008-10-25 Sewing machine

Country Status (5)

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EP (1) EP2058426B1 (en)
JP (1) JP5346556B2 (en)
KR (1) KR101468744B1 (en)
CN (1) CN101429710B (en)
DE (2) DE102007052876A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018206088A1 (en) * 2018-04-20 2019-10-24 Dürkopp Adler AG sewing machine
CN109537184A (en) * 2019-01-14 2019-03-29 杰克缝纫机股份有限公司 A kind of sewing machine and its presser feet regulator
DE102019133956B4 (en) * 2019-12-11 2022-12-29 Lisa Dräxlmaier GmbH SEWING MACHINE WITH A SPACER, AND USE OF A SPACER IN A SEWING MACHINE

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Publication number Priority date Publication date Assignee Title
DE53542C (en) * L. A. ELSTER, Arzt, und E. YOUNG, Beide in Jeff er sonville, sowie J. E. KNAPP in West - Lancaster, Ohio, V. St. A Screw locking by means of a wrench clamped between two nuts
DD35150A (en)
DE35150C (en) * J. SCHERBEL und T. REMUS in Dresden Production of toothed corner strips for the edge connection of cardboard boxes
DD53542A (en)
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DE309985C (en) * 1917-03-07
GB347854A (en) * 1930-04-09 1931-05-07 Singer Mfg Co Improvements in or relating to work-holders for sewing machines
US2541888A (en) * 1948-04-05 1951-02-13 Singer Mfg Co Speed-responsive presser device for sewing machines
DE873487C (en) * 1951-02-07 1953-04-13 Kochs Adler Ag Fabric printing device with moving and ventilating presser foot
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JPS446856Y1 (en) * 1966-04-11 1969-03-13
US3793969A (en) * 1972-10-03 1974-02-26 Singer Co Presser bar pressure control modules
GB1488364A (en) * 1974-10-02 1977-10-12 Singer Co Presser device for overedge sewing machine
GB2068027B (en) * 1980-01-25 1983-04-07 Rossendale Sewing Machine Co L Top spring for sewing machine foot bar
JP2762437B2 (en) * 1987-06-27 1998-06-04 アイシン精機株式会社 Sewing machine lifting device
DE19728817C1 (en) * 1997-07-05 1998-06-04 Duerkopp Adler Ag Sewing machine presser foot drive
JP2002525185A (en) * 1998-09-26 2002-08-13 クイック ロタン エレクトロモトーレン ゲーエムベーハー Operation device
IT1314415B1 (en) * 2000-06-23 2002-12-13 Vi Be Mac Spa DEVICE TO CONTROL PRESSURE OF THE PRESSER FEET FOR SEWING MACHINES OR SIMILAR.
CN2646176Y (en) * 2003-11-04 2004-10-06 东莞市寮步恒昌机械厂 Presser plate regulating mechanism of computerised spininess quilter

Also Published As

Publication number Publication date
CN101429710B (en) 2012-11-21
KR20090047374A (en) 2009-05-12
CN101429710A (en) 2009-05-13
DE502008002121D1 (en) 2011-02-10
DE102007052876A1 (en) 2009-05-20
KR101468744B1 (en) 2014-12-03
DE102007052876A8 (en) 2009-08-27
JP2009112819A (en) 2009-05-28
EP2058426A1 (en) 2009-05-13
JP5346556B2 (en) 2013-11-20

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