EP0138218B1 - Overedge sewing machine - Google Patents

Overedge sewing machine Download PDF

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Publication number
EP0138218B1
EP0138218B1 EP84112366A EP84112366A EP0138218B1 EP 0138218 B1 EP0138218 B1 EP 0138218B1 EP 84112366 A EP84112366 A EP 84112366A EP 84112366 A EP84112366 A EP 84112366A EP 0138218 B1 EP0138218 B1 EP 0138218B1
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EP
European Patent Office
Prior art keywords
sewing machine
clutch
machine according
shaft
overedge sewing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84112366A
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German (de)
French (fr)
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EP0138218A2 (en
EP0138218A3 (en
Inventor
Hans Wagner
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J Strobel & Sohne & Co GmbH
J Strobel and Sohne GmbH and Co
Original Assignee
J Strobel & Sohne & Co GmbH
J Strobel and Sohne GmbH and Co
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Publication date
Application filed by J Strobel & Sohne & Co GmbH, J Strobel and Sohne GmbH and Co filed Critical J Strobel & Sohne & Co GmbH
Publication of EP0138218A2 publication Critical patent/EP0138218A2/en
Publication of EP0138218A3 publication Critical patent/EP0138218A3/xx
Application granted granted Critical
Publication of EP0138218B1 publication Critical patent/EP0138218B1/en
Expired legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/10—Work-feeding means with rotary circular feed members
    • D05B27/18—Feed cups

Definitions

  • the invention relates to an overlock sewing machine for sewing insoles to shoe uppers with two driven transport plates, each of which abuts the insole or shaft material.
  • overlock sewing machines are known (DE-A-1804370), in which the two transport plates can be driven with different stride lengths, and it is also known to use such overlock sewing machines in the manufacture of reversible shoes, it is difficult to accurately determine the mutual relationship of these stride lengths to be set as required when sewing an insole to a shoe upper to achieve perfect sewing material transport along the heel curve of the insole and the shoe upper.
  • the invention has for its object to provide an overlock sewing machine of the type specified at the outset, in which the difficulties described are eliminated in a simple manner and which provide trouble-free sewing even along narrow arches with a relatively small radius of curvature, in particular along the heel curve of the insole and the shoe upper, enables.
  • the clutch is disengaged, which is preferably provided to interrupt the drive of the outer transport plate adjacent to the inner sole material, so that then only the Shaft material adjacent inner transport plate is driven step by step and the outer transport plate drives idle, which is movable with respect to the inner transport plate and spring-loaded thereon and can be moved away from the inner transport plate against the effect of the spring load, as required for inserting the material into the overlock sewing machine. In this way, any warping of the sewing material and any wedging of the sewing material with the transport plates is reliably prevented.
  • the invention also relates primarily to an overlock sewing machine for sewing insoles to shoe uppers, it can also be implemented in other overcast sewing machines with two driven transport plates for the sewing material, in which sewing has to be carried out along narrow arches with a relatively small radius of curvature and then the difficulties described can occur.
  • the Matterwelichnähmschine not shown in detail for sewing insoles to shoe uppers works like this and, including a housing 1 and two driven transport plates 2 and 3 for the material to be sewn, is constructed as usual, apart from the drive mechanism for the outer transport plate 3, which when sewing on the insole material abuts, the two transport plates 2 and 3 being driven in opposite directions in order to transport the sewing material perpendicular to the plane of the drawing.
  • the inner transport plate 2 is rotatably mounted about a vertical axis 4 in the housing 1 of the overlock sewing machine and is connected by an endless toothed belt 5 to a vertical shaft 6, likewise rotatably mounted in the housing 1, for driving the inner transport plate 2.
  • the toothed belt 5 wraps around a toothed wheel 7 on the shaft 6 and a toothed ring 8 on the inner transport plate 2.
  • the outer transport plate 3 is also rotatably mounted about a vertical axis 9 and lies in the same horizontal plane as the inner transport plate 2, in which it can be moved with respect to the latter in the direction of the double arrow 10, namely under the action of a spring load on the inner transport plate 2 to and against the action of the spring load away from the inner transport plate 2 in order to clamp and hold the sewing material between the two transport plates 2 and 3 or to vent the outer transport plate 3 from the inner transport plate 2, as required for inserting the sewing material into the overlock sewing machine.
  • the outer transport plate 3 is attached to the lower end of a vertical shaft 11 which is rotatably mounted in a sleeve 12 of a support arm 13 for the outer transport plate 3 and has a bevel gear 14 at the upper end.
  • the support arm 13 is movably mounted in the housing 1 of the overlock sewing machine in the direction of the double arrow 10.
  • the bevel gear 14 meshes with a bevel gear 15 which is attached to the adjacent end of a variable-length telescopic shaft 16 which extends in the direction of movement of the outer transport plate 3, that is to say parallel to the double arrow 10, and is provided with a further bevel gear 17 at the other end.
  • the telescopic shaft 16 consists of two mutually coaxial shaft pieces 18 and 19, which are each provided with one bevel gear 15 and the other bevel gear 17 and are rotatably mounted in the support arm 13 or in the housing 1 and are connected to one another in a form-fitting manner at the two adjacent ends are that the shaft piece 18 of the support arm 13 can move accordingly with respect to the other shaft piece 19 when the outer transport plate 3 or the support arm 13 moves in the direction of the double arrow 10 without the rotary connection between the two shaft pieces 18 and 19 being interrupted .
  • bevel gear 17 of the telescopic shaft 16 or the shaft piece 19 of the same meshes a bevel gear 20, which is attached to the adjacent end of a vertical shaft 21 rotatably mounted in the housing 1 of the overlock sewing machine, which in conjunction with a further vertical shaft 22 for driving the serves outer transport plate 3, which is also rotatably mounted in the housing 1.
  • the two shafts 21 and 22 are arranged coaxially to one another, and a coupling 23 is provided between them, which can be actuated by means of a double-acting pneumatic actuating cylinder 24 attached to the housing 1.
  • the clutch 23 is designed as a clamping or friction clutch and has two mutually longitudinally movable sleeves 25 and 26.
  • One sleeve 25 is axially displaceable on the one vertical shaft 21, but arranged in a rotationally fixed manner, for example with the aid of a tongue and groove connection, and adjustable on the shaft 21 by means of the actuating cylinder 24 via a pivoting lever 27 which is attached to the housing 1 of the overlock sewing machine a horizontal axis 28 which is perpendicular to the shaft 21 is pivotably mounted and engages with a fork-shaped end 29 in an annular groove 30 of the sleeve 25 via two rollers provided thereon.
  • the other sleeve 26 is fixed on the adjacent end of the other vertical shaft 22 and provided with an inner friction ring 31 which is fixedly connected to the sleeve 26.
  • the two sleeves 25 and 26 are each provided with a conical contact surface 32 and 33, which tapers in the direction from the axially displaceable sleeve 25 to the axially fixed sleeve 26.
  • the contact surface 32 of the axially displaceable sleeve 25 is provided on the outside on a cylindrical extension 34 thereof, the contact surface 33 of the axially fixed sleeve 26 on the inside on the friction ring 31 thereof.
  • the cylindrical extension 34 With the cylindrical extension 34, the axially displaceable sleeve 25 protrudes into the friction ring 31 of the axially fixed sleeve 26, so that the two conical bearing surfaces 32 and 33 of the two sleeves 25 and 26, which are designed corresponding to one another, lie opposite one another.
  • the two mutually parallel shafts 6 and 22 are driven, each intermittently.
  • One shaft 6 rotates the inner transport plate 2 via the toothed belt 5 and the other shaft 22 the outer transport plate 3 via the vertical shaft 21, the telescopic shaft 16 and the hanging shaft 11 of the outer transport plate 3 accordingly when the clutch 23 is closed or is indented.
  • the actuating cylinder 24 is actuated to open or disengage the clutch 23 and the pivoting lever 27 about the axis -28 to pivot counterclockwise so that the axially displaceable sleeve 25 on the associated vertical shaft 21 runs away from the other sleeve 26 on the other vertical shaft 22 and the two sleeves 25 and 26 come out of engagement with each other, that is lift the two conical contact surfaces 32 and 33 apart, as shown.
  • Said actuation of the actuating cylinder 24 can be carried out by means of a valve and a pedal, which is connected to the valve via a linkage and, when the operator of the overlock sewing machine is depressed, causes the double-acting pneumatic actuating cylinder 24 to be pressurized accordingly via the valve, which otherwise otherwise uses compressed air is applied that he presses the two sleeves 25 and 26 together and holds them in mutual engagement.
  • the clutch 23 Shortly before reaching the heel curve of the insole and the shoe upper, the clutch 23 is opened or disengaged and held in this state until the insole material and the Shaft material along the heel curve of the insole and the shoe upper are sewn together, so that any warping of the sewing material and any jamming of the sewing material and the transport plates 2 and 3 are excluded.
  • the clutch 23 is then closed or engaged again in order to drive both transport plates 2 and 3 again step by step during the remaining part of the sewing process if the seam connecting the insole to the shoe upper has not started at the relevant end of the heel curve of the insole and the shoe upper .

Description

Die Erfindung bezieht sich auf eine Überwendlichnähmaschine zum Annähen von Innensohlen an Schuhschäfte mit zwei angetriebenen Transporttellern, welche jeweils am Innensohlen- bzw. Schaftmaterial anliegen.The invention relates to an overlock sewing machine for sewing insoles to shoe uppers with two driven transport plates, each of which abuts the insole or shaft material.

Derartige Überwendlichnähmaschinen kommen bei der Herstellung von Wendeschuhen zum Einsatz. Dabei ergeben sich besondere Schwierigkeiten beim Nähen entlang der Fersenrundung der Innensohle und des Schuhschaftes, weil infolge des verhältnismäßig kleinen Krümmungsradius des Bogens, entlang welchem dort genäht werden muß, und der Dicke des zwischen den beiden jeweils intermittierend angetriebenen Transporttellern befindlichen Innensohlen- und Schaftmaterials die Wegstrecken, entlang welcher der eine bzw. der andere Transportteller abrollen muß, derart unterschiedlich sein können,. daß das Nähgut verzogen wird und/oder sich mit den Transporttellern verkeilt.Such overlock sewing machines are used in the manufacture of reversible shoes. This results in particular difficulties when sewing along the heel curve of the insole and the shoe upper, because due to the relatively small radius of curvature of the arch, along which sewing has to be carried out, and the thickness of the insole and upper material located between the two intermittently driven transport plates, the distances covered along which the one or the other transport plate has to roll can be so different. that the material is warped and / or wedged with the transport plates.

Es sind zwar Überwendlichnähmaschinen bekannt (DE-A-1804370), bei denen die beiden Transportteller mit unterschiedlichen Schrittlängen antreibbar sind, und es ist auch bekannt, solche Überwendlichnähmaschinen bei der Herstellung von Wendeschuhen einzusetzen, jedoch ist es schwierig, das gegenseitige Verhältnis dieser Schrittlängen genau so einzustellen, wie beim Annähen einer Innensohle an einen Schuhschaft zur Erzielung eines einwandfreien Nähguttransportes entlang der Fersenrundung der Innensohle und des Schuhschaftes jeweils erforderlich.Although overlock sewing machines are known (DE-A-1804370), in which the two transport plates can be driven with different stride lengths, and it is also known to use such overlock sewing machines in the manufacture of reversible shoes, it is difficult to accurately determine the mutual relationship of these stride lengths to be set as required when sewing an insole to a shoe upper to achieve perfect sewing material transport along the heel curve of the insole and the shoe upper.

Der Erfindung liegt die Aufgabe zugrunde, eine Überwendlichnähmaschine der eingangs angegebenen Gattung zu schaffen, bei welcher die geschilderten Schwierigkeiten auf einfache Weise behoben sind und welche ein störungsfreies Nähen auch entlang enger Bögen mit verhältnismäßig kleinem Krümmungsradius, insbesondere entlang der Fersenrundung der Innensohle und des Schuhschaftes, ermöglicht.The invention has for its object to provide an overlock sewing machine of the type specified at the outset, in which the difficulties described are eliminated in a simple manner and which provide trouble-free sewing even along narrow arches with a relatively small radius of curvature, in particular along the heel curve of the insole and the shoe upper, enables.

Diese Aufgabe ist durch die im kennzeichnenden Teil des Patentanspruchs 1 angegebene Maßnahme gelöst. Vorteilhafte Ausgestaltungen der erfindungsgemäßen Überwendlichnähmaschine sind in den restlichen Patentansprüchen angegeben.This object is achieved by the measure specified in the characterizing part of patent claim 1. Advantageous embodiments of the overlock sewing machine according to the invention are specified in the remaining patent claims.

Bei der erfindungsgemäßen Überwendlichnähmaschine wird während des Annähens einer Innensohle an einen Schuhschaft kurz vor Erreichen der Fersenrundung der Innensohle und des Schuhschaftes die Kupplung ausgerückt, welche vorzugsweise zur Unterbrechung des Antriebs des am Innensohlenmaterial anliegenden, äußeren Transporttellers vorgesehen ist, so.daß dann nur der am Schaftmaterial anliegende, innere Transportteller schrittweise angetrieben wird und der äußere Transportteller antriebslos mitiäuft, welcher bezüglich des inneren Transporttellers beweglich und auf denselben zu federbelastet sowie entgegen der Wirkung der Federbelastung vom inneren Transportteller weg bewegbar ist, wie für das Nähguteinsetzen in die Überwendlichnähmaschine erforderlich. Auf diese Weise ist jeglicher Verzug des Nähgutes und jegliches Verkeilen des Nähgutes mit den Transporttellern zuverlässig verhindert.In the overlock sewing machine according to the invention, during the sewing of an insole to a shoe upper shortly before reaching the heel curve of the insole and the shoe upper, the clutch is disengaged, which is preferably provided to interrupt the drive of the outer transport plate adjacent to the inner sole material, so that then only the Shaft material adjacent inner transport plate is driven step by step and the outer transport plate drives idle, which is movable with respect to the inner transport plate and spring-loaded thereon and can be moved away from the inner transport plate against the effect of the spring load, as required for inserting the material into the overlock sewing machine. In this way, any warping of the sewing material and any wedging of the sewing material with the transport plates is reliably prevented.

Wenn die Erfindung sich auch in erster Linie auf eine Überwendlichnähmaschine zum Annähen von Innensohlen an Schuhschäfte bezieht, so kann sie doch auch bei anderen Überwendlichnähmaschinen mit zwei angetriebenen Transporttellern für das Nähgut verwirklicht werden, bei denen entlang enger Bögen mit verhältnismäßig kleinem Krümmungsradius genäht werden muß und dann die geschilderten Schwierigkeiten auftreten können.If the invention also relates primarily to an overlock sewing machine for sewing insoles to shoe uppers, it can also be implemented in other overcast sewing machines with two driven transport plates for the sewing material, in which sewing has to be carried out along narrow arches with a relatively small radius of curvature and then the difficulties described can occur.

Nachstehend ist eine Ausführungsform der erfindungsgemäßen Überwendlichnähmaschine anhand einer Zeichnung beispielsweise beschrieben, deren einzige Figur schematisch die beiden Transportteller derselben und deren Antriebsmechanismen wiedergibt.An embodiment of the overlock sewing machine according to the invention is described below with reference to a drawing, for example, the only figure of which schematically represents the two transport plates thereof and their drive mechanisms.

Die im einzelnen nicht dargestellte Überwendlichnähmschine zum Annähen von Innensohlen an Schuhschäfte funktioniert so und ist einschließlich eines Gehäuses 1 sowie zweier angetriebener Transportteller 2 und 3 für das Nähgut so aufgebaut, wie üblich, abgesehen vom Antriebsmechanismus für den äußeren Transportteller 3, welcher beim Nähen am Innensohlenmaterial anliegt, wobei die beiden Transportteller 2 und 3 gegenläufig angetrieben werden, um das Nähgut senkrecht zur Zeichnungsebene zu transportieren.The Überwendlichnähmschine not shown in detail for sewing insoles to shoe uppers works like this and, including a housing 1 and two driven transport plates 2 and 3 for the material to be sewn, is constructed as usual, apart from the drive mechanism for the outer transport plate 3, which when sewing on the insole material abuts, the two transport plates 2 and 3 being driven in opposite directions in order to transport the sewing material perpendicular to the plane of the drawing.

Der innere Transportteller 2 ist um eine senkrechte Achse 4 im Gehäuse 1. der Überwendlichnähmaschine drehbar gelagert und durch einen endlosen Zahnriemen 5 mit einer senkrechten, ebenfalls im Gehäuse 1 drehbar gelagerten Welle 6 zum Antrieb des inneren Transporttellers 2 verbunden. Der Zahnriemen 5 umschlingt ein Zahnrad 7 an der Welle 6 und einen Zahnkranz 8 am inneren Transportteller 2.The inner transport plate 2 is rotatably mounted about a vertical axis 4 in the housing 1 of the overlock sewing machine and is connected by an endless toothed belt 5 to a vertical shaft 6, likewise rotatably mounted in the housing 1, for driving the inner transport plate 2. The toothed belt 5 wraps around a toothed wheel 7 on the shaft 6 and a toothed ring 8 on the inner transport plate 2.

Der äußere Transportteller 3 ist gleichfalls um eine senkrechte Achse 9 drehbar gelagert und liegt in derselben waagerechten Ebene wie der innere Transportteller 2, in welcher er bezüglich des letzteren in Richtung des Doppelpfeils 10 bewegbar ist, und zwar unter der Wirkung einer Federbelastung auf den inneren Transportteller 2 zu und entgegen der Wirkung der Federbelastung vom inneren Transportteller 2 weg, um das Nähgut zwischen den beiden Transporttellern 2 und 3 einzuklemmen und zu halten bzw. den äußeren Transportteller 3 vom inneren Transportteller 2 zu lüften, wie für das Nähguteinsetzen in die Überwendlichnähmaschine erforderlich.The outer transport plate 3 is also rotatably mounted about a vertical axis 9 and lies in the same horizontal plane as the inner transport plate 2, in which it can be moved with respect to the latter in the direction of the double arrow 10, namely under the action of a spring load on the inner transport plate 2 to and against the action of the spring load away from the inner transport plate 2 in order to clamp and hold the sewing material between the two transport plates 2 and 3 or to vent the outer transport plate 3 from the inner transport plate 2, as required for inserting the sewing material into the overlock sewing machine.

Der äußere Transportteller 3 ist am unteren Ende einer senkrechten Welle 11 befestigt, welche in einer Hülse 12 eines Tragarms 13 für den äußeren Transportteller 3 drehbar gelagert ist und am oberen Ende ein Kegelrad 14 aufweist. Der Tragarm 13 ist im Gehäuse 1 der Überwendlichnähmaschine in Richtung des Doppelpfeils 10 beweglich gelagert. Das Kegelrad 14 kämmt mit einem Kegelrad 15, welches am benachbarten Ende einer längenveränderlichen Teleskopwelle 16 befestigt ist, die sich in Bewegungsrichtung des äußeren Transporttellers 3, also parallel zum Doppelpfeil 10, erstreckt und am anderen Ende mit einem weiteren Kegelrad 17 versehen ist. Die Teleskopwelle 16 besteht aus zwei zueinander koaxialen Wellenstücken 18 und 19, welche jeweils mit dem einen Kegelrad 15 bzw. dem anderen Kegelrad 17 versehen sowie im Tragarm 13 bzw. im Gehäuse 1 drehbar gelagert sind und an den beiden einander benachbarten Enden derart formschlüssig miteinander verbunden sind, daß das Wellenstück 18 des Tragarms 13 sich bezüglich des anderen Wellenstücks 19 bei Bewegung des äußeren Transporttellers 3 bzw. des Tragarms 13 desselben in Richtung des Doppelpfeils 10 entsprechend verschieben kann, ohne daß die Drehverbindung zwischen den beiden Wellenstücken 18 und 19 unterbrochen werden würde.The outer transport plate 3 is attached to the lower end of a vertical shaft 11 which is rotatably mounted in a sleeve 12 of a support arm 13 for the outer transport plate 3 and has a bevel gear 14 at the upper end. The support arm 13 is movably mounted in the housing 1 of the overlock sewing machine in the direction of the double arrow 10. The bevel gear 14 meshes with a bevel gear 15 which is attached to the adjacent end of a variable-length telescopic shaft 16 which extends in the direction of movement of the outer transport plate 3, that is to say parallel to the double arrow 10, and is provided with a further bevel gear 17 at the other end. The telescopic shaft 16 consists of two mutually coaxial shaft pieces 18 and 19, which are each provided with one bevel gear 15 and the other bevel gear 17 and are rotatably mounted in the support arm 13 or in the housing 1 and are connected to one another in a form-fitting manner at the two adjacent ends are that the shaft piece 18 of the support arm 13 can move accordingly with respect to the other shaft piece 19 when the outer transport plate 3 or the support arm 13 moves in the direction of the double arrow 10 without the rotary connection between the two shaft pieces 18 and 19 being interrupted .

Mit dem Kegelrad 17 der Teleskopwelle 16 bzw. des Wellenstücks 19 derselben kämmt ein Kegelrad 20, welches auf dem benachbarten Ende einer senkrechten, im Gehäuse 1 der Überwendlichnähmaschine drehbar gelagerten Welle 21 befestigt ist, die im Verein mit einer weiteren senkrechten Welle 22 zum Antrieb des äußeren Transporttellers 3 dient, welche gleichfalls im Gehäuse 1 drehbar gelagert ist. Die beiden Wellen 21 und 22 sind koaxial zueinander angeordnet, und zwischen ihnen ist eine Kupplung 23 vorgesehen, welche mittels eines am Gehäuse 1 angebrachten, doppeltwirkenden pneumatischen Stellzylinders 24 betätigbar ist.With the bevel gear 17 of the telescopic shaft 16 or the shaft piece 19 of the same meshes a bevel gear 20, which is attached to the adjacent end of a vertical shaft 21 rotatably mounted in the housing 1 of the overlock sewing machine, which in conjunction with a further vertical shaft 22 for driving the serves outer transport plate 3, which is also rotatably mounted in the housing 1. The two shafts 21 and 22 are arranged coaxially to one another, and a coupling 23 is provided between them, which can be actuated by means of a double-acting pneumatic actuating cylinder 24 attached to the housing 1.

Die Kupplung 23 ist als Klemm- oder Reibungskupplung ausgebildet und weist zwei gegenseitig längsbewegliche Hülsen 25 und 26 auf. Die eine Hülse 25 ist auf der einen senkrechten Welle 21 axial verschiebbar, jedoch drehfest angeordnet, beispielsweise mit Hilfe einer Nut/Feder-Verbindung, und auf der Welle 21 mittels des Stellzylinders 24 über einen Schwenkhebel 27 verstellbar, welcher am Gehäuse 1 der Überwendlichnähmaschine um eine zur Welle 21 senkrechte, waagerechte Achse 28 verschwenkbar gelagert ist und mit einem gabelförmigen Ende 29 über zwei daran vorgesehene Rollen in eine Ringnut 30 der Hülse 25 eingreift. Die andere Hülse 26 ist auf dem benachbarten Ende der anderen senkrechten Welle 22 befestigt und mit einem inneren Reibring 31 versehen, welcher mit der Hülse 26 fest verbunden ist.The clutch 23 is designed as a clamping or friction clutch and has two mutually longitudinally movable sleeves 25 and 26. One sleeve 25 is axially displaceable on the one vertical shaft 21, but arranged in a rotationally fixed manner, for example with the aid of a tongue and groove connection, and adjustable on the shaft 21 by means of the actuating cylinder 24 via a pivoting lever 27 which is attached to the housing 1 of the overlock sewing machine a horizontal axis 28 which is perpendicular to the shaft 21 is pivotably mounted and engages with a fork-shaped end 29 in an annular groove 30 of the sleeve 25 via two rollers provided thereon. The other sleeve 26 is fixed on the adjacent end of the other vertical shaft 22 and provided with an inner friction ring 31 which is fixedly connected to the sleeve 26.

Die beiden Hülsen 25 und 26 sind jeweils mit einer konischen Anlagefläche 32 bzw. 33 versehen, welche sich in Richtung von der axial verschiebbaren Hülse 25 zur axial feststehenden Hülse 26 verjüngt. Die Anlagefläche 32 der axial verschiebbaren Hülse 25 ist außen an einem zylindrischen Fortsatz 34 derselben vorgesehen, die Anlagefläche 33 der axial feststehenden Hülse 26 innen am Reibring 31 derselben. Mit dem zylindrischen Fortsatz 34 ragt die axial verschiebbare Hülse 25 in den Reibring 31 der axial feststehenden Hülse 26, so daß die beiden einander entsprechend ausgebildeten konischen Anlageflächen 32 und 33 der beiden Hülsen 25 und 26 einander gegenüberliegen.The two sleeves 25 and 26 are each provided with a conical contact surface 32 and 33, which tapers in the direction from the axially displaceable sleeve 25 to the axially fixed sleeve 26. The contact surface 32 of the axially displaceable sleeve 25 is provided on the outside on a cylindrical extension 34 thereof, the contact surface 33 of the axially fixed sleeve 26 on the inside on the friction ring 31 thereof. With the cylindrical extension 34, the axially displaceable sleeve 25 protrudes into the friction ring 31 of the axially fixed sleeve 26, so that the two conical bearing surfaces 32 and 33 of the two sleeves 25 and 26, which are designed corresponding to one another, lie opposite one another.

Wenn die Überwendlichnähmaschine näht, dann werden die beiden zueinander parallelen Wellen 6 und 22 angetrieben, und zwar jeweils intermittierend. Dabei dreht die eine Welle 6 den inneren Transportteller 2 über den Zahnriemen 5 und die andere Welle 22 den äußeren Transportteller 3 über die senkrechte Welle 21, die Teleskopwelle 16 und die hängende Welle 11 des äußeren Transporttellers 3 entsprechend schrittweise, wenn die Kupplung 23 geschlossen bzw. eingerückt ist. Wenn beim Nähen der Antrieb des äußeren Transporttellers 3 unterbrochen werden soll, so daß nur der innere Transportteller 2 schrittweise angetrieben wird und der äußere Transportteller 3 antriebslos mitläuft, dann wird der Stellzylinder 24 betätigt, um die Kupplung 23 zu öffnen bzw. auszurücken und den Schwenkhebel 27 um die Achse -28 entgegen dem Uhrzeigersinn zu schwenken, so daß die axial verschiebbare Hülse 25 auf der zugehörigen senkrechten Welle 21 von der anderen Hülse 26 an der anderen senkrechten Welle 22 wegläuft und die beiden Hülsen 25 sowie 26 gegenseitig außer Eingriff kommen, also die beiden konischen Anlageflächen 32 und 33 voneinander abheben, wie dargestellt. Die besagte Betätigung des Stellzylinders 24 kann mittels eines Ventils und eines Pedals erfolgen, welches mit dem Ventil über ein Gestänge verbunden ist und beim Niedertreten durch das Bedienungspersonal der Überwendlichnähmaschine eine entsprechende Druckluftbeaufschlagung des doppeltwirkenden pneumatischen Stellzylinders 24 über das Ventil bewirkt, der ansonsten so mit Druckluft beaufschlagt ist, daß er die beiden Hülsen 25 und 26 zusammendrückt und in gegenseitigem Eingriff hält.When the overlock sewing machine sews, the two mutually parallel shafts 6 and 22 are driven, each intermittently. One shaft 6 rotates the inner transport plate 2 via the toothed belt 5 and the other shaft 22 the outer transport plate 3 via the vertical shaft 21, the telescopic shaft 16 and the hanging shaft 11 of the outer transport plate 3 accordingly when the clutch 23 is closed or is indented. If the drive of the outer transport plate 3 is to be interrupted during sewing, so that only the inner transport plate 2 is driven step by step and the outer transport plate 3 rotates without drive, then the actuating cylinder 24 is actuated to open or disengage the clutch 23 and the pivoting lever 27 about the axis -28 to pivot counterclockwise so that the axially displaceable sleeve 25 on the associated vertical shaft 21 runs away from the other sleeve 26 on the other vertical shaft 22 and the two sleeves 25 and 26 come out of engagement with each other, that is lift the two conical contact surfaces 32 and 33 apart, as shown. Said actuation of the actuating cylinder 24 can be carried out by means of a valve and a pedal, which is connected to the valve via a linkage and, when the operator of the overlock sewing machine is depressed, causes the double-acting pneumatic actuating cylinder 24 to be pressurized accordingly via the valve, which otherwise otherwise uses compressed air is applied that he presses the two sleeves 25 and 26 together and holds them in mutual engagement.

Wenn beim Annähen einer Innensohle an einen Schuhschaft zur Herstellung eines Wendeschuhs die Naht an einer Seite der Innensohle und des Schuhschaftes begonnen und das Innensöhlenmaterial mit dem Schaftmaterial in Richtung auf die Schuhspitze zu, entlang derselben und wieder davon weg vernäht wird, dann ist die Kupplung 23 währenddessen geschlossen bzw. eingerückt und werden die beiden Transportteller 2 und 3 synchron mit etwa gleicher Schrittlänge am Umfang intermittierend angetrieben, abgesehen vom Nähen entlang der Schuhspitze, wobei der am Schaftmaterial anliegende innere Transportteller 2 mit einer um ein bestimmtes Ausmaß größeren Schrittlänge am Umfang als der am Innensohlenmaterial anliegende äußere Transportteller 3 intermittierend angetrieben wird, um das Schaftmaterial zu raffen, bei welchem in diesem Bereich eine Überweite vorliegt. Kurz vor Erreichen der Fersenrundung der Innensohle und des Schuhschaftes wird die Kupplung 23 geöffnet bzw. ausgerückt und so lange in diesem Zustand gehalten, bis das Innensohlenmaterial und das Schaftmaterial entlang der Fersenrundung der Innensohle und des Schuhschaftes miteinander vernäht sind, so daß jeglicher Verzug des Nähgutes und jegliches Verklemmen des Nähgutes und der Transportteller 2 und 3 miteinander ausgeschlossen ist. Danach wird die Kupplung 23 wieder geschlossen bzw. eingerückt, um beide Transportteller 2 und 3 wieder während des restlichen Teils des Nähvorganges schrittweise anzutreiben, falls die die Innensohle mit dem Schuhschaft verbindende Naht nicht am betreffenden Ende der Fersenrundung der Innensohle und des Schuhschaftes begonnen worden ist.If, when sewing an insole to a shoe upper to produce a reversible shoe, the seam on one side of the insole and the shoe upper begins and the inner sole material is sewn with the upper material towards, along, and away from the shoe tip, then the coupling 23 meanwhile closed or engaged and the two transport plates 2 and 3 are driven synchronously with approximately the same step length on the circumference intermittently, apart from sewing along the tip of the shoe, the inner transport plate 2 lying against the shaft material having a step length on the circumference that is a certain amount larger than that the outer transport plate 3 lying against the insole material is driven intermittently in order to gather the upper material, in which there is an excess width in this area. Shortly before reaching the heel curve of the insole and the shoe upper, the clutch 23 is opened or disengaged and held in this state until the insole material and the Shaft material along the heel curve of the insole and the shoe upper are sewn together, so that any warping of the sewing material and any jamming of the sewing material and the transport plates 2 and 3 are excluded. The clutch 23 is then closed or engaged again in order to drive both transport plates 2 and 3 again step by step during the remaining part of the sewing process if the seam connecting the insole to the shoe upper has not started at the relevant end of the heel curve of the insole and the shoe upper .

Claims (9)

1. Overedge sewing machine, particularly for sewing inner soles to shoelegs, including two driven feed disks (2 and 3) contacting the inner sole material and respectively the leg material, characterized by a clutch (23) for interrupting the driving of one feed disk (3).
2. Overedge sewing machine according to claim 1, characterized in that the clutch (23) is disposed between two mutually coaxial shafts (21 and 22) serving to drive the feed disk (3).
3. Overedge sewing machine according to claim 2, characterized in that the clutch (23) is designed as a clamp or friction clutch.
4. Overedge sewing machine according to claim 3, characterized in that the clutch (23) includes two sleeves (25 and 26) movable with respect to each other in longitudinal direction and having tapered contact surfaces (32 and 33) facing each other, the one sleeve being disposed on the one shaft (21) in an axially displaceable but non-rotary manner and the other sleeve being secured on the other shaft (22).
5. Overedge sewing machine according to claim 4, characterized in that at least one sleeve (26) has a friction covering or friction ring (31) on which the tapered contact surface -(33) of the sleeve (26) is formed.
6. Overedge sewing machine according to any one of the preceding claims, characterized in that the clutch (23) is provided for interrupting the driving of the outer feed disk (3) contacting the inner sole material which is spring-loaded towards the inner feed disk (2) contacting the leg material and which can be moved away from this feed disk against the action of said spring- loading.
7. Overedge sewing machine according to claim 6 in combination with claim 2, 3, 4 or 5, characterized in that the two mutually coaxial shafts (21 and 22) provided with the clutch (23) are connected to the outer feed disk (3) for driving same through a telescope shaft (16) variable in length which extends parallel to the direction (10) of movement of the outer feed disk (3).
8. Overedge sewing machine according to claim 7, characterized in that the two mutually coaxial shafts (21 and 22) provided with the clutch (23) are disposed perpendicularly to the telescope shaft (16) and parallel to the axes of rotation (4 and 9) of the two feed disks (2 and 3) and to a shaft (6) for driving the inner feed disk (2).
9. Overedge sewing machine according to any one of the preceding claims, characterized in that the clutch (23) is adapted to be actuated by means of a servo-motor, preferably a pneumatic servo-cylinder (24).
EP84112366A 1983-10-18 1984-10-15 Overedge sewing machine Expired EP0138218B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3337876 1983-10-18
DE3337876A DE3337876C1 (en) 1983-10-18 1983-10-18 Overlock sewing machine

Publications (3)

Publication Number Publication Date
EP0138218A2 EP0138218A2 (en) 1985-04-24
EP0138218A3 EP0138218A3 (en) 1985-07-10
EP0138218B1 true EP0138218B1 (en) 1987-03-04

Family

ID=6212137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84112366A Expired EP0138218B1 (en) 1983-10-18 1984-10-15 Overedge sewing machine

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Country Link
US (1) US4583477A (en)
EP (1) EP0138218B1 (en)
JP (1) JPH069636B2 (en)
DE (1) DE3337876C1 (en)
ES (1) ES281765Y (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3927493C1 (en) * 1989-08-21 1990-12-13 G.M. Pfaff Ag, 6750 Kaiserslautern, De

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US768111A (en) * 1903-10-06 1904-08-23 Washburn Crosby Co Thread-cutter for bag-sewing machines.
US1443962A (en) * 1920-11-11 1923-02-06 Union Special Machine Co Feeding mechanism for overseaming machines
US1518520A (en) * 1921-06-10 1924-12-09 Union Special Machine Co Sewing machine
US2105097A (en) * 1935-06-12 1938-01-11 Puritan Mfg Company Sewing machine with roller feed
US2990092A (en) * 1954-10-08 1961-06-27 Clevite Corp Tape drive mechanism
DE943926C (en) * 1954-12-12 1956-06-01 Kunert Werke G M B H Sewing machine with feed bowls
LU39422A1 (en) * 1960-11-16
US3177992A (en) * 1961-12-27 1965-04-13 Clark Equipment Co Clutch control system
DE1804370A1 (en) * 1968-10-22 1970-05-14 Strobel Oskar Sewing machine with adjustable material withdrawing - device
US3625168A (en) * 1969-11-28 1971-12-07 Louis Palazzo Workpiece puller adapted for attachment to the needle bar of a sewing machine
US4280425A (en) * 1979-07-09 1981-07-28 Pce Corporation Method and apparatus for electro-pneumatic control of a stitching machine
US4010700A (en) * 1976-02-09 1977-03-08 South-Co Machinery Company, Inc. Program controlled power transmission
US4182248A (en) * 1977-08-08 1980-01-08 Klages Arthur C Fabric puller
JPS5483560A (en) * 1977-12-15 1979-07-03 Tokico Ltd Cloth feeder
IT1095892B (en) * 1978-05-17 1985-08-17 Rockwell Rimoldi Spa IMPROVEMENT TO A SEWING MACHINE WITH COUNTER-ROTATING PLATES
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GB2076865B (en) * 1980-01-25 1983-03-30 Rossendale Sewing Machines Co Feed device for sewing machines

Also Published As

Publication number Publication date
ES281765U (en) 1985-04-01
EP0138218A2 (en) 1985-04-24
ES281765Y (en) 1985-11-01
US4583477A (en) 1986-04-22
DE3337876C1 (en) 1985-01-03
EP0138218A3 (en) 1985-07-10
JPH069636B2 (en) 1994-02-09
JPS60108079A (en) 1985-06-13

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