EP0053105B1 - Fancy stitch sewing machine - Google Patents

Fancy stitch sewing machine Download PDF

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Publication number
EP0053105B1
EP0053105B1 EP19820100255 EP82100255A EP0053105B1 EP 0053105 B1 EP0053105 B1 EP 0053105B1 EP 19820100255 EP19820100255 EP 19820100255 EP 82100255 A EP82100255 A EP 82100255A EP 0053105 B1 EP0053105 B1 EP 0053105B1
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EP
European Patent Office
Prior art keywords
sewing machine
stitch sewing
carrier
base
lever
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP19820100255
Other languages
German (de)
French (fr)
Other versions
EP0053105A1 (en
Inventor
Willi Meier
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.)
Dorina Nahmaschinen GmbH
Original Assignee
Dorina Nahmaschinen 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
Priority claimed from DE19782839963 external-priority patent/DE2839963C2/en
Priority claimed from DE19782840209 external-priority patent/DE2840209C2/en
Application filed by Dorina Nahmaschinen GmbH filed Critical Dorina Nahmaschinen GmbH
Priority to EP19820100255 priority Critical patent/EP0053105B1/en
Publication of EP0053105A1 publication Critical patent/EP0053105A1/en
Application granted granted Critical
Publication of EP0053105B1 publication Critical patent/EP0053105B1/en
Expired legal-status Critical Current

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Classifications

    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B27/00Work-feeding means
    • D05B27/22Work-feeding means with means for setting length of stitch
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B19/00Programme-controlled sewing machines

Definitions

  • the invention specified in the claim is therefore based on the object of accommodating both the control curves and the selection device in the region of the center of gravity of the sewing machine, that is to say where there is only a limited space available due to the design.
  • the sewing machine shown in FIG. 1 has an upper arm 1 which is connected to a base 3 via a stand 2.
  • the base 3 is supported by a base plate 4 and is widened towards the front relative to the stand 2 and the upper arm 1. It is equipped with a fabric support arm 5 which is displaced rearward with respect to the central axis of the base 3 and in which the lower stitch-forming tools, in particular the gripper of the sewing machine, are mounted.
  • a main shaft, not shown, mounted in the upper arm 1 of the machine drives a lower shaft 8 via a toothed belt 6 (FIG. 2) and a toothed wheel 7, which shaft serves to drive the gripper in a known manner, not shown.
  • a carrier 9 is fastened with screws 10 in the base 3 of the sewing machine.
  • an axle 11 is fastened in two bearings, on which a block 12 is loosely mounted, which consists of a series of control cams 13 arranged one behind the other and a gear 14 arranged in front of it. This meshes with a gear 15 fastened on the shaft 8.
  • an adjusting crank (not shown) is rotatably mounted, the position of which can be adjusted by means of a transmission linkage (also not shown) of an adjusting disk 16 rotatably mounted on the carrier 9 (FIG. 1) -Direction of a slider 17 determined.
  • a selection device 18 is installed in the carrier 9 (FIG. 2).
  • a number of levers 20 corresponding to the number of control cams 13 is suspended on an axle 19 mounted in the carrier 9.
  • Each lever 20 is equipped with a locking arm 21 and an arm 22 projecting upwards.
  • a feeler lever 25 is rotatably mounted on each lever 20 and has two scanning lugs 26 and 27.
  • the levers 20 can each be locked in two positions by means of a locking rocker 28 which is pivotably mounted in the carrier 9.
  • its locking arms 21 each have a Ra - TNase 29 which can engage in a respective one of two recesses 30 on the locking rocker arm 28 which is urged by a spring 31 against the locking noses 29th
  • the levers 20 have lugs 32 against which leaf springs 33 which are fastened to the support 9 are supported.
  • the leaf springs 33 are equipped with stops 34 against which the raised levers 20 bear.
  • the scanning lugs 26 arranged on one side of the feeler levers 25 can cooperate with one of the control cams 13 arranged next to one another, while the sensing lugs 27 arranged on the other side of the feeler levers bear against a vibrating frame 35 which is supported in the carrier 9 by means of an axis 36 is stored.
  • the swing frame 35 is connected to a pin 37 on which a tie rod 38 engages, which is connected in a known manner to a needle bar pendulum mounted in the upper arm 1, in which a vertically movable needle bar 39 is guided.
  • the swing-out width of the needle bar 39 is controlled by actuating one or more of the operating elements 24.
  • an operating element 24 When an operating element 24 is depressed, the associated lever 20 is pivoted downward and its latching lug 29 snaps into the lower recess 30 of the latching rocker 28.
  • the locking rocker 28 swings out against the tension of the spring 32, a lever 20 previously locked in the recess 30 is pressed upward by the associated leaf spring 33 against the stop 34 designed to be resilient for noise damping.
  • the locking lug 29 of the lever 20 lies freely in the upper recess 30.
  • the feeler lever 25 articulated on it is brought into contact with the associated control cam 13 and the swing frame 35.
  • the selected control cam 13 thus swings the oscillating frame 35 via the associated feeler lever 25, which swings out the needle bar 39 according to the curve shape of the selected control cam 13 via the associated pin 37 and the pull rod 38.

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

Description

Bei der im Oberbegriff des Anspruches als bekannt angegebenen Zierstichnähmaschine (US-PS 3 279 402) sind die Steuerkurven sowie die dazugehörige Drucktasten aufweisende Wähleinrichtung im Oberarm der Nähmaschine angeordnet, da dort der meiste platz für dieses recht umfangreiche Aggregat zur Verfügung steht. Der Schwerpunkt der Nähmaschine wird infolge des eine große Masse aufweisenden Kurvenscheiben- und Wählaggregates von der Standfläche der nähmaschine nach oben verlagert, so daß sich beim Betrieb der Nähmaschine unerwünschte Schwingungen ergeben können.In the decorative stitch sewing machine specified in the preamble of the claim (US Pat. No. 3,279,402), the control cams and the associated selection device having pushbuttons are arranged in the upper arm of the sewing machine, since there is the most space available for this quite extensive unit. The center of gravity of the sewing machine is shifted upward from the standing surface of the sewing machine due to the large mass of cam and selection unit, so that undesirable vibrations can result when the sewing machine is in operation.

Außerdem wird bei der Betätigung der an der Frontseite des Oberarmes angeordneten Drucktasten ein Kippmoment auf die Nähmaschine ausgeübt, wodurch diese sich bei nicht sehr leichtgängigen Tasten auf ihrer Unterlage verschieben kann.In addition, when the pushbuttons arranged on the front of the upper arm are actuated, a tilting moment is exerted on the sewing machine, as a result of which it can move on its base when the buttons are not very easy to move.

Der im Anspruch angegebenen Erfindung liegt daher die Aufgabe zugrunde, sowohl die Steuerkurven als auch die Wähleinrichtung in dem Bereich des Schwerpunktes der nähmaschine unterzubringen, also dort, wo konstruktionsbedingt nur ein beschränkter Platz zur Verfügung steht.The invention specified in the claim is therefore based on the object of accommodating both the control curves and the selection device in the region of the center of gravity of the sewing machine, that is to say where there is only a limited space available due to the design.

Diese Aufgabe wird bei einer Zierstichnähmaschine nach dem Oberbegriff des Anspruches durch die im kennzeichnungsteil dieses Anspruches angegebenen Merkmale gelöst. Durch die erfindungsgemäße Anordnung der Steuerkurven und der Wähleinrichtung auf einem gemeinsamen Träger ergibt sich eine kompakte Anordnung, die sich im Sockel der Nähmaschine unterbringen läßt. Es wird nicht nur die Standfestigkeit der Nähmaschine verbessert, sondern es werden damit auch die Antriebsübertragung und schließlich auch die Bedienung der Nähmaschine wesentlich erleichtert. Zudem wird nun die Standfestigkeit der Nähmaschine während der Bedienung der Drucktasten nicht mehr so wie früher beeinträchtigt.This object is achieved in a decorative stitch sewing machine according to the preamble of the claim by the features specified in the characterizing part of this claim. The inventive arrangement of the control cams and the selector on a common carrier results in a compact arrangement that can be accommodated in the base of the sewing machine. Not only is the stability of the sewing machine improved, but also the drive transmission and ultimately the operation of the sewing machine are made considerably easier. In addition, the stability of the sewing machine during operation of the push buttons is no longer impaired as it used to be.

In der Zeichnung ist ein Ausführungsbeispiel einer Nähmaschine nach der Erfindung dargestellt. Es zeigen :

  • Figur 1 eine schaubildliche Ansicht der Nähmaschine;
  • Figur 2 einen Schnitt nach der Linie 11-11 der Fig.1.
In the drawing, an embodiment of a sewing machine according to the invention is shown. Show it :
  • Figure 1 is a perspective view of the sewing machine;
  • 2 shows a section along the line 11-11 of Fig.1.

Die in Fig. 1 dargestelle Nähmaschine weist einen Oberarm 1 auf, der über einen Ständer 2 mit einem Sockel 3 verbunden ist. Der Sockel 3 wird von einer Bodenplatte 4 getragen und ist gegenüber dem Ständer 2 und dem Oberarm 1 nach vorn verbreitert. Er ist mit einem in bezug auf die Mittelachse des Sockels 3 nach hinten verlagerten Stofftragarm 5 ausgestattet, in dem die unteren Stichbildewerkzeuge, insbesondere der Greifer der Nähmaschine, gelagert sind.The sewing machine shown in FIG. 1 has an upper arm 1 which is connected to a base 3 via a stand 2. The base 3 is supported by a base plate 4 and is widened towards the front relative to the stand 2 and the upper arm 1. It is equipped with a fabric support arm 5 which is displaced rearward with respect to the central axis of the base 3 and in which the lower stitch-forming tools, in particular the gripper of the sewing machine, are mounted.

Eine im Oberarm 1 der Maschine gelagerte nicht dargestellte Hauptwelle treibt über einen Zahnriemen 6 (Fig. 2) und ein Zahnrad 7 eine untere Welle 8 an, welche in bekannter nicht dargestellter Weise zum Antrieb des Greifers dient.A main shaft, not shown, mounted in the upper arm 1 of the machine drives a lower shaft 8 via a toothed belt 6 (FIG. 2) and a toothed wheel 7, which shaft serves to drive the gripper in a known manner, not shown.

Im Sockel 3 der Nähmaschine ist ein Träger 9 mit Schrauben 10 befestigt. Im Träger 9 ist in zwei Lagern eine Achse 11 befestigt, auf der ein Block 12 lose gelagert ist, der aus einer Reihe von hintereinander angeordneten Steuerkurven 13 sowie einem davor angeordneten Zahnrad 14 besteht. Dieses stebt mit einem auf der Welle 8 befestigten Zahnrad 15 in Eingriff.A carrier 9 is fastened with screws 10 in the base 3 of the sewing machine. In the support 9, an axle 11 is fastened in two bearings, on which a block 12 is loosely mounted, which consists of a series of control cams 13 arranged one behind the other and a gear 14 arranged in front of it. This meshes with a gear 15 fastened on the shaft 8.

Auf dem aus dem Träger 8 herausragenden Ende der Achse 11 ist eine nicht dargestellte Stellkurbel drehbar gelagert, die über ein ebenfalls nicht dargestelltes Übertragungsgestänge von einer am Träger 9 verdrehbar gelagerten Einstellscheibe 16 (Fig. 1) in ihrer Lage verstellbar ist und die die Vorschubgröße und -richtung eines Stoffschiebers 17 bestimmt.On the end of the axis 11 protruding from the carrier 8, an adjusting crank (not shown) is rotatably mounted, the position of which can be adjusted by means of a transmission linkage (also not shown) of an adjusting disk 16 rotatably mounted on the carrier 9 (FIG. 1) -Direction of a slider 17 determined.

Im Träger 9 (Fig. 2) ist eine Wähleinrichtung 18 eingebaut. Dazu ist auf einer im Träger 9 gelagerten Achse 19 eine der Zahl der Steuerkurven 13 entsprechende Zahl von Hebeln 20 aufgehängt. Jeder hebel 20 ist mit einem Rastarm 21 und einem nach oben ragenden Arm 22 ausgestattet. Auf jedem der Arme 22 ist ein durch eine entsprechende Durchtrittsöffnung 23 an der Oberseite des Sockels 3 ragendes als Drucktaste ausgebildetes Bedienungselement 24 aufgesteckt. An jedem Hebel 20 ist ein Tasthebel 25 drehbar gelagert, der zwei Abtastnasen 26 und 27 aufweist.A selection device 18 is installed in the carrier 9 (FIG. 2). For this purpose, a number of levers 20 corresponding to the number of control cams 13 is suspended on an axle 19 mounted in the carrier 9. Each lever 20 is equipped with a locking arm 21 and an arm 22 projecting upwards. On each of the arms 22, an operating element 24, designed as a push button and protruding through a corresponding passage opening 23 on the upper side of the base 3, is attached. A feeler lever 25 is rotatably mounted on each lever 20 and has two scanning lugs 26 and 27.

Die Hebel 20 sind durch eine im Träger 9 schwenkbar gelagerte Rastschwinge 28 jeweils in zwei Stellungen verrastbar. Dazu weisen ihre Rastarme 21 je eine Ra-tnase 29 auf, die in eine von jeweils zwei entsprechenden Vertiefungen 30 an der Rastschwinge 28 einrasten können, die mit einer Feder 31 gegen die Rastnasen 29 gedrückt wird. Die Hebel 20 weisen Ansätze 32 auf, gegen die sich an dem Träger 9 befestigte Blattfedern 33 abstützen. Die Blattfedern 33 sind mit Anschlägen 34 ausgestattet, gegen die sich die angehobenen Hebel 20 anlegen.The levers 20 can each be locked in two positions by means of a locking rocker 28 which is pivotably mounted in the carrier 9. For this purpose, its locking arms 21 each have a Ra - TNase 29 which can engage in a respective one of two recesses 30 on the locking rocker arm 28 which is urged by a spring 31 against the locking noses 29th The levers 20 have lugs 32 against which leaf springs 33 which are fastened to the support 9 are supported. The leaf springs 33 are equipped with stops 34 against which the raised levers 20 bear.

Die auf der einen Seite der Tasthebel 25 angeordneten Abtastnasen 26 können mit jeweils einer der nebeneinander angeordneten Steuerkurven 13 zusammenwirken, während sich die auf der anderen Seite der Tasthebel 25 angeordneten Abtastnasen 27 an einen Schwingrahmen 35 anlegen, der mittels einer Achse 36 in dem Träger 9 gelagert ist. Der Schwingrahmen 35 ist mit einem Stift 37 verbunden, an dem eine Zugstange 38 angreift, die in bekannter Weise mit einem im oberarm 1 gelagerten Nadelstangenpendel verbunden ist, in dem eine vertikal bewegliche Nadelstange 39 geführt ist.The scanning lugs 26 arranged on one side of the feeler levers 25 can cooperate with one of the control cams 13 arranged next to one another, while the sensing lugs 27 arranged on the other side of the feeler levers bear against a vibrating frame 35 which is supported in the carrier 9 by means of an axis 36 is stored. The swing frame 35 is connected to a pin 37 on which a tie rod 38 engages, which is connected in a known manner to a needle bar pendulum mounted in the upper arm 1, in which a vertically movable needle bar 39 is guided.

Die Nähmaschine arbeitet wie folgt :

  • Beim Umlauf der Hauptwelle läuft die Welle 8, über den Zahnriemen 6 angetrieben, mit der gleichen Geschwindigkeit wie die Hauptwelle um. Die Welle 8 treibt über die Zahnräder 15 und 14 den auf der Achse 11 gelagerten Block 12 mit der Untersetzung von 6 : 1 an.
The sewing machine works as follows:
  • When the main shaft rotates, the shaft 8, driven by the toothed belt 6, rotates at the same speed as the main shaft. The shaft 8 drives via the gears 15 and 14 the block 12 mounted on the axis 11 with the gear ratio of 6: 1.

Die Steuerung der Ausschwingweite der Nadelstange 39 erfolgt durch Betätigung eines oder mehrerer der Bedienungselemente 24. Beim Niederdrücken eines Bedienungselementes 24 wird der zugehörige Hebel 20 nach unten verschwenkt und seine Rastnase 29 rastet in die untere Vertiefung 30 der Rastschwinge 28 ein. Bei der dabei erfolgenden Ausschwingung der Rastschwinge 28 gegen den Zug der Feder 32 wird ein vorher in der Vertiefung 30 verrasteter Hebel 20 durch die zugehörige Blattfeder 33 nach oben gegen den zur Geräuschdämpfung federnd ausgebildeten Anschlag 34 gedrückt. Die Rastnase 29 des Hebels 20 legt sich dabei frei in die obere Vertiefung 30 ein.The swing-out width of the needle bar 39 is controlled by actuating one or more of the operating elements 24. When an operating element 24 is depressed, the associated lever 20 is pivoted downward and its latching lug 29 snaps into the lower recess 30 of the latching rocker 28. When the locking rocker 28 swings out against the tension of the spring 32, a lever 20 previously locked in the recess 30 is pressed upward by the associated leaf spring 33 against the stop 34 designed to be resilient for noise damping. The locking lug 29 of the lever 20 lies freely in the upper recess 30.

Durch die Bewegung des betätigten Hebels 20 in seine untere Lage wird der an ihm angelenkte Tasthebel 25 in Anlage an die zugehörige Steuerkurve 13 und an den Schwingrahmen 35 gebracht. Beim Umlauf des Blockes 12 verschwingt somit die ausgewählte Steuerkurve 13 über den zugehörigen Tasthebel 25 den Schwingrahmen 35, wobei dieser über den damit verbundenen Stift 37 und die Zugstange 38 die Nadelstange 39 entsprechend der Kurvenform der ausgewählten Steuerkurve 13 ausschwingt.By moving the actuated lever 20 into its lower position, the feeler lever 25 articulated on it is brought into contact with the associated control cam 13 and the swing frame 35. When the block 12 rotates, the selected control cam 13 thus swings the oscillating frame 35 via the associated feeler lever 25, which swings out the needle bar 39 according to the curve shape of the selected control cam 13 via the associated pin 37 and the pull rod 38.

Claims (1)

  1. Fancy stitch sewing-machine with a plurality of cams (13) which can be sensed and can be connected individually or several together by a selector device (18), comprising operating elements (24), to transmission means in order to adjust the width of overstitch of the needle bar (39) and/or the advance direction of the feed dog (17), characterized in that the cams (13) and the selector device (18) are jointly mounted on a carrier (9) mounted in the base (3) of the sewing-machine.
EP19820100255 1978-09-14 1979-08-06 Fancy stitch sewing machine Expired EP0053105B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19820100255 EP0053105B1 (en) 1978-09-14 1979-08-06 Fancy stitch sewing machine

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE2839963 1978-09-14
DE19782839963 DE2839963C2 (en) 1978-09-14 1978-09-14 Decorative stitch sewing machine
DE19782840209 DE2840209C2 (en) 1978-09-15 1978-09-15 Zigzag sewing machine with a plurality of control cams arranged coaxially on an axis
DE2840209 1978-09-15
EP19820100255 EP0053105B1 (en) 1978-09-14 1979-08-06 Fancy stitch sewing machine

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP79102828.5 Division 1979-08-06

Publications (2)

Publication Number Publication Date
EP0053105A1 EP0053105A1 (en) 1982-06-02
EP0053105B1 true EP0053105B1 (en) 1984-09-26

Family

ID=27187672

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820100255 Expired EP0053105B1 (en) 1978-09-14 1979-08-06 Fancy stitch sewing machine

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EP (1) EP0053105B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3279402A (en) * 1958-04-08 1966-10-18 Janome Sewing Machine Co Ltd Cam selecting arrangement for zig-zag stitch sewing machine
CH445275A (en) * 1965-03-19 1967-10-15 Wittenberge Naehmasch Veb Drive the material slide of sewing machines
JPS5922547B2 (en) * 1975-03-28 1984-05-28 ブラザー工業株式会社 sewing machine programming device
US4014275A (en) * 1975-11-13 1977-03-29 The Singer Company Sewing machine re-programmable memory

Also Published As

Publication number Publication date
EP0053105A1 (en) 1982-06-02

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