EP0555502B1 - Positionierungsvorrichtung in Nähmaschinen zum Schliessen des Zehenteils von Strümpfen oder dergleichen - Google Patents

Positionierungsvorrichtung in Nähmaschinen zum Schliessen des Zehenteils von Strümpfen oder dergleichen Download PDF

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Publication number
EP0555502B1
EP0555502B1 EP92102411A EP92102411A EP0555502B1 EP 0555502 B1 EP0555502 B1 EP 0555502B1 EP 92102411 A EP92102411 A EP 92102411A EP 92102411 A EP92102411 A EP 92102411A EP 0555502 B1 EP0555502 B1 EP 0555502B1
Authority
EP
European Patent Office
Prior art keywords
laminae
sock
toe
passage
free end
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 - Lifetime
Application number
EP92102411A
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English (en)
French (fr)
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EP0555502A1 (de
Inventor
Giancarlo Pozzi
Sergio Salvetti
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Conti Complett SpA
Original Assignee
Conti Complett SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Conti Complett SpA filed Critical Conti Complett SpA
Priority to EP92102411A priority Critical patent/EP0555502B1/de
Priority to AT92102411T priority patent/ATE155178T1/de
Priority to ES92102411T priority patent/ES2103839T3/es
Priority to DE69220772T priority patent/DE69220772T2/de
Publication of EP0555502A1 publication Critical patent/EP0555502A1/de
Application granted granted Critical
Publication of EP0555502B1 publication Critical patent/EP0555502B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B7/00—Linking machines, e.g. for joining knitted fabrics
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B23/00—Sewing apparatus or machines not otherwise provided for
    • D05B23/007—Sewing units for assembling parts of knitted panties or closing the stocking toe part

Definitions

  • the present invention relates to a positioning device in sewing machines for closing the toe of socks or the like, as defined in the preamble of the appended claim 1 and as disclosed for example in DE-A-2 420 167.
  • socks, men's socks in particular are generally manufactured with circular machines which form a semiworked tubular product which is shaped like a sock and is open at the toe. This product is then subjected to a finishing operation which consists in closing the toe by darning or by so-called "blind" mechanical sewing.
  • the loops at the open toe of the sock are arranged manually, one by one, on appropriate pins of the darning machine which are then affected by an extremely accurate sewing which joins the various loops to one another. Sewing performed with darning machines can be likened to the creation of a row of knitting whose loops join the loops of the toe of the sock. The finish obtained with the darning operation is very good, since the loop joining line is scarcely detectable not only visually but also to the touch.
  • darning Although it provides a very good final result, darning has the problem that it requires relatively long execution times and thus significantly affects the costs of the finished product. Due to this reason, darned socks are the best-finished and most sought-after socks, but are also the most expensive.
  • finishing by blind sewing has the advantage, with respect to darning, that it requires significantly shorter execution times and thus allows to manufacture finished socks with considerably lower costs.
  • sewing machines for finishing socks currently in use are provided, at their inlet, with a pair of laminae which are arranged mutually adjacent so as to define, between them, a passage in which the sock is inserted proximate to the toe, with its two flaps to be joined arranged mutually adjacent beforehand.
  • the sock is then pulled, in this arrangement, along the passage defined by the two laminae toward a cutting unit which removes the excess part of the flaps of the toe to be closed and toward one or more sewing units which close the toe.
  • the positioning of the sock between the two laminae, which act as guides during the advancement of the sock, is facilitated by a particular execution of the part of sock to be sewn.
  • This particular execution which is performed on the circular machine, substantially consists in ending the toe, which is to be subsequently closed, with a few rows of knitting constituted by a highly elastic thread, for example made of polyamide fiber, which is thinner than the remaining part of the sock and, subsequently, of a thicker border which is intended to be removed, together with the rows made of elastic thread, prior to sewing.
  • the sock is inserted between the pair of laminae so that the flaps to be joined are arranged mutually adjacent and so that the thinner elastic portion is arranged at the passage defined between the laminae, so that said border protrudes from one side of the laminae whereas the remaining part of the sock protrudes from the opposite side.
  • This refinement allows to obtain a semiworked product which has, proximate to the toe to be closed, starting from the body of the sock, a row of thicker knitting with longer loops, a thinner portion made of elastic thread, and finally a border which is thicker than said portion.
  • a product of this type arranged correctly during the execution of blind sewing, it is possible to obtain socks whose degree of finish can be compared to that which can be obtained with darned socks, despite distinctly lower production costs.
  • the aim of the present invention is to provide a device for sewing machines for closing the toe of socks or the like, which can ensure the correct positioning of the sock while it is fed to the cutting and sewing unit so as to allow to obtain socks with a sewn toe with a considerably improved degree of finish.
  • an object of the invention is to provide a positioning device which can be fitted to current sewing machines and allows to fully exploit the advantages, in terms of quality and costs, offered by the particular preparation of the products for manufacturing socks which are the subject of the above mentioned patent application no. 20259 A/90.
  • Another object of the invention is to simplify and quicken the operations for positioning the products with the toe to be sewn on the sewing machines.
  • a further object of the invention is to provide a device which can be manufactured in a simple manner and with modest production costs.
  • a positioning device in sewing machines for closing the toe of socks or the like comprising a pair of laminae which are arranged mutually adjacent so as to define, between them, a passage for the insertion of a portion of the sock, arranged proximate to the toe to be closed, which has a reduced thickness at least with respect to a border which delimits said portion on the side of the body of the sock, in order to position said sock so that one free end of the toe to be closed protrudes from one side of said pair of laminae and so that the body of the sock protrudes from the opposite side, characterized in that it comprises tension application means which can engage said free end of the toe to gradually lift said free end of the toe away from the side of said laminae which is directed away from said sock body and cooperate with said laminae in order to position said border, which delimits said reduced-thickness portion on the side of the
  • the positioning device comprises, in a known manner, a pair of laminae 2a and 2b which are arranged mutually adjacent so as to define, between them, a passage 3 inside which a sock 4, whose toe is to be closed, is intended to be inserted; said toe is to be closed by means of a sewing which is performed by sewing units arranged downstream of the positioning device 1, along the advancement direction indicated by the arrow 5, which is parallel to the longitudinal extension of the laminae 2a and 2b and thus of the passage 3.
  • the laminae 2a and 2b are associated in a downward direction with two supports 6 and 7 which are mutually spaced along the advancement direction 5 and are joined by a cross-member 8.
  • the laminae 2a and 2b are co-planar and are generally associated, by means of the supports 6 and 7, with the sewing machine so that they are arranged in a horizontal plane.
  • the ends 9a and 9b of the laminae, between which the sock 4 must be inserted, are conveniently rounded in order to facilitate insertion.
  • the device is provided with tension application means 13 which can engage the free end of the toe of the sock 4 and cooperate with the laminae 2a and 2b in order to position it correctly with respect to the laminae.
  • the sock 4 whose toe must be closed by sewing, is preferably constituted by a product manufactured according to what is described in patent application no. 20259 A/90.
  • a product has, proximate to the toe to be closed, a row of knitting 10, possibly reinforced, which is constituted by longer loops with respect to the body 4a of the sock formed previously; a portion 11, which is constituted by a few rows of knitting made with a thin elastic thread and is therefore thinner than the row 10 and the body of the sock; and an end border 12 which is thicker than the portion 11.
  • the sock 4 is inserted between the laminae 2a, 2b so that the two flaps of the toe to be sewn are mutually adjacent and so that the thinner portion 11 is arranged at the passage 3, so that the end border 12, which constitutes the free end of the toe, protrudes from the upper side of the laminae 2a and 2b, whereas the body of the sock protrudes from the lower side of the laminae 2a and 2b.
  • the tension application means can engage the border 12 and apply traction to the sock in a direction which is transverse to the plane of arrangement of the laminae 2a and 2b so as to arrange, during the advancement of the sock along the direction 5, the row of knitting 10, which delimits the thinner portion 11, against the lower side of the laminae 2a, 2b.
  • the tension application means 13 comprise a device which is fitted with clamps which can move along the advancement direction 5 and can engage the border 12.
  • the clamp-fitted device faces the upper side of the laminae 2a and 2b, and the advancement direction of the clamps is concordant with the direction 5 but is inclined with respect to the plane of arrangement of the laminae in order to progressively space the clamps, which engage the border 12, from the plane of arrangement of the laminae.
  • the clamp-fitted device comprises a pair of chains 14a and 14b which wind around two pairs of pinions, respectively 15a, 15b, 16a and 16b, and are arranged in a plane which faces the upper face of the laminae 2a and 2b.
  • the chains 14a and 14b and the pinions on which they wind are supported by a block 18 which is pivoted, with one of its ends, to the support 6 about a pivoting axis 19 which is arranged transversely to the advancement direction 5 so as to allow the block 18 to oscillate about said axis in order to vary the inclination of said block 18, and thus of the plane of arrangement of the chains 14a and 14b, with respect to the plane of arrangement of the laminae 2a and 2b.
  • the inclination of the block 18 is adjusted by means of a screw 20 which is associated with the end of the block which is opposite to its pivoting axis and rests against an abutment which is rigidly associated with the laminae and is constituted by the support 7.
  • the pinions 15a and 15b are supported by shafts 21a and 21b which are mutually connected by means of a pair of gears 22a and 22b so that the pinions 15a and 16a rotate in opposite directions with respect to the pinions 15b and 16b, thus obtaining the concordant advancement of the chains 14a and 14b along the mutually facing arms.
  • One of the two shafts 21a or 21b is rotated about its own axis in a per se known manner, for example by means of an electric motor which is not illustrated for the sake of simplicity.
  • the laminae 2a and 2b have a thinner region proximate to the passage 3, and their portion which delimits the passage 3, in the region of the chains 14a and 14b, is provided with a portion 23 which extends away from the plane of arrangement of the chains 14a and 14b, along the advancement direction 5, in order to aid the chains in applying tension to the sock, as will become apparent hereinafter.
  • means are provided for adjusting the mutual distance of the laminae 2a, 2b so as to allow to vary the width of the passage 3.
  • Said adjustment means can be constituted, in a known manner, by screws 24 and 25 which can turn by means of knobs 26 and 27 associated with the supports 6 and 7 and couple to female threads which are rigidly associated with one of the laminae in order to move it transversely to the direction 5.
  • the screws 24 and 25 can be locked by means of transverse screws 28 and 29 which are also associated with the supports 6 and 7.
  • the operation of the positioning device according to the invention is as follows.
  • the sock 4 to be sewn is inserted between the ends 9a and 9b of the laminae, so that the thinner portion 11 is at the passage 3, and is pulled manually along the direction 5 up to the chains 14a and 14b.
  • the chains 14a and 14b by virtue of the teeth 17, engage the border 12 of the sock and automatically continue the advancement of said sock along the advancement direction 5.
  • the sock Due to the inclination of the plane of arrangement of the chains 14a and 14b with respect to the plane of arrangement of the laminae 2a and 2b, the sock is subjected, during advancement, to an application of tension, transversely to the plane of arrangement of the laminae, which moves the row 10, i.e. the border which delimits the thinner portion 11 on the side of the sock body 4a, against the lower side of the laminae 2a, 2b. It should be noted that this application of tension is aided by the presence of the portion 23 of the laminae which is inclined in the opposite direction.
  • the sock reaches the cutting and sewing stations, arranged downstream of the device, in a correct position, and the cutting of the portion 11 and of the border 12, as well as the sewing, can occur with great precision.
  • the finished socks have a degree of finish which is aesthetically and qualitatively comparable to that of darned socks.
  • the mutual distance of the laminae 2a and 2b and the inclination of the plane of arrangement of the chains 14a and 14b with respect to the laminae are changed according to the type of sock to be sewn.
  • the device according to the invention fully achieves the intended aim, since by ensuring the precise positioning of the socks in the sewing machine it allows to perform extremely accurate sewings, obtaining high quality for the finished socks.
  • a further advantage is that it simplifies and quickens the operation for loading the socks on the sewing machines.
  • the positioning device according to the invention has been studied in particular for sewing socks prepared according to the teachings of patent application no. 20259 A/90, it can in any case be used to position socks prepared for sewing the toe in a conventional manner.
  • the sewing does not achieve aesthetic and qualitative characteristics comparable to those of darning, the result is in any case a sewing which is more precise, and thus qualitatively better, than sewings performed with conventional sewing machines, i.e. with sewing machines not provided with the positioning device according to the invention.
  • the materials employed, as well as the dimensions, may be any according to the requirements and the state of the art.

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

Claims (8)

  1. Positionierungsvorrichtung in Nähmaschinen zum Schließen des Zehenteils von Strümpfen oder dergleichen, mit einem Paar derart nebeneinander angeordneter Plättchen (2a, 2b), daß zwischen ihnen ein Zwischengang (3) zum Einführen eines Teils (11) eines Strumpfes (4) gebildet ist, der nahe dem zu schließenden Zehenteil angeordnet und dünner ist zumindest als ein ihn an dem Hauptteil (4a) des Strumpfes begrenzender Rand (10), um den Strumpf so zu positionieren, daß ein freies Ende (12) des zu schließenden Zehenteils auf einer Seite des Plättchenpaares hervorsteht, und daß der Hauptteil (4a) des Strumpfes auf der anderen Seite hervorsteht, gekennzeichnet durch Spanneinrichtungen (14a, 14b), die das freie Ende des Zehenteils halten können, um es nach und nach von der dem Hauptteil des Strumpfes abgewandten Seite der Plättchen abzuheben, und die mit den Plättchen (2a, 2b) kooperieren, um den den dünneren Teil (11) am Hauptteil (4a) des Strumpfes begrenzenden Rand (10) gegen die dem Hauptteil (4a) des Strumpfes zugewandte Seite (23) der Plättchen während der Führung des Strumpfes entlang dem Zwischengang (3) zu positionieren.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Plättchen (2a, 2b) koplanar zumindest nahe dem Zwischengang (3) sind, daß die Spanneinrichtungen mit Klammern (14a, 14b) versehen sind, die entlang einer dem Verlauf des durch die Plättchen (2a, 2b) definierten Zwischengangs (3) folgenden Vorschubrichtung beweglich sind, wobei die mit Klammern versehene Vorrichtung der Seite der Plättchen zugewandt ist, die das freie Ende (12) des Zehenteils des Strumpfes hält, und daß die Vorschubrichtung im Bezug auf die Anordnungsebene der Plättchen geneigt ist, um die das freie Ende des Zehenteils des Strumpfes haltenden Klammern (14a, 14b) progressiv von der Anordnungsebene der Plättchen während einem Vorschub entlang dem Zwischengang zu entfernen.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Klammern enthaltende Vorrichtung ein Paar Ketten (14a, 14b) hat, von denen sich zwei Abschnitte an dem Zwischengang (3) gegenüber liegen, wobei jede Kette mit Zähnen (17) versehene Gelenke hat, die mit den Zähnen der Gelenke der anderen Kette entlang den beiden gegenüberliegenden Abschnitten in Eingriff sind, um das freie Ende (11) des Zehenteils des in den Zwischengang (3) eingeführten Strumpfes zu ergreifen.
  4. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Ketten (14a, 14b) um zwei Paare sich in entgegengesetzt zueinander drehender Zahnräder (15a, 15b; 16a, 16b) geführt sind, die in einer den Plättchen (2a, 2b) gegenüberliegenden Ebene angeordnet sind, die im Bezug auf die Anordnungsebene der Plättchen geneigt ist.
  5. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, gekennzeichnet durch Einrichtungen (19, 20) zum Einstellen der Neigung der Vorschubrichtung der Klammern enthaltenden Vorrichtung im Bezug auf die Anordnungsebene der Plättchen.
  6. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, gekennzeichnet durch einen die Zahnräder (15a, 15b; 16a, 16b) tragenden Block (18), welcher um eine quer zu der Vorschubrichtung (5) angeordnete Achse (19) schwenkbar an den Plättchen befestigt ist, so daß ein Schwenken zum Einstellen der Neigung des Blockes (18) im Bezug auf die Anordnungsebene der Plättchen (2a, 2b) möglich ist, wobei die Neigung des Blockes mittels einer Schraube (20) variabel ist, die an dem Block an einer Stelle angeordnet ist, die von seiner Schwenkachse (19) beabstandet ist, und auf einem fest mit den Plättchen (2a, 2b) verbundenem Lager (7) liegt.
  7. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zumindest ein Teil (23) der Plättchen, der den Zwischengang (3) an der Spanneinrichtung begrenzt sich über einen bestimmten Bereich in Vorschubrichtung (5) von der Spanneinrichtung entfernt.
  8. Vorrichtung nach einem oder mehreren der vorhergehenden Ansprüche, gekennzeichnet durch Mittel (24-29) zum Einstellen des gegenseitigen Abstandes der Plättchen zum Variieren der Breite des Zwischengangs.
EP92102411A 1992-02-13 1992-02-13 Positionierungsvorrichtung in Nähmaschinen zum Schliessen des Zehenteils von Strümpfen oder dergleichen Expired - Lifetime EP0555502B1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP92102411A EP0555502B1 (de) 1992-02-13 1992-02-13 Positionierungsvorrichtung in Nähmaschinen zum Schliessen des Zehenteils von Strümpfen oder dergleichen
AT92102411T ATE155178T1 (de) 1992-02-13 1992-02-13 Positionierungsvorrichtung in nähmaschinen zum schliessen des zehenteils von strümpfen oder dergleichen
ES92102411T ES2103839T3 (es) 1992-02-13 1992-02-13 Dispositivo de posicionamiento en maquinas de coser para cerrar la punta del pie en calcetines o similares.
DE69220772T DE69220772T2 (de) 1992-02-13 1992-02-13 Positionierungsvorrichtung in Nähmaschinen zum Schliessen des Zehenteils von Strümpfen oder dergleichen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP92102411A EP0555502B1 (de) 1992-02-13 1992-02-13 Positionierungsvorrichtung in Nähmaschinen zum Schliessen des Zehenteils von Strümpfen oder dergleichen

Publications (2)

Publication Number Publication Date
EP0555502A1 EP0555502A1 (de) 1993-08-18
EP0555502B1 true EP0555502B1 (de) 1997-07-09

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EP92102411A Expired - Lifetime EP0555502B1 (de) 1992-02-13 1992-02-13 Positionierungsvorrichtung in Nähmaschinen zum Schliessen des Zehenteils von Strümpfen oder dergleichen

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Country Link
EP (1) EP0555502B1 (de)
AT (1) ATE155178T1 (de)
DE (1) DE69220772T2 (de)
ES (1) ES2103839T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103789932A (zh) * 2013-11-22 2014-05-14 诸暨市实干针织机械有限公司 一种全自动直式袜子缝头机

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IT1292459B1 (it) * 1997-07-02 1999-02-08 Conti Complett Spa Convogliatore per macchine cucitrici per la chiusura della punta di calze o simili,ad elevata versatilita' di impiego
ITFI20010063A1 (it) * 2001-04-11 2002-10-11 Metalworking And Finance Group Metodo e dispositivo per la chiusura della punta di manufatti,tubolari a maglia
JP3792567B2 (ja) * 2001-12-07 2006-07-05 株式会社ダン リンキング方法およびリンキング装置
CN101008133B (zh) * 2006-01-25 2011-12-07 康悌-康卜莱脱有限公司 缝合袜头部分的方法和装置
CN103614868B (zh) * 2013-11-21 2015-01-21 诸暨市实干针织机械有限公司 一种自动袜子缝头机的进料导口装置
CN117071183B (zh) * 2023-08-22 2024-03-15 瑞安市澳翔服饰有限公司 一种袜子缝头机及其使用方法

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US3060874A (en) * 1960-09-27 1962-10-30 Fillmore C Rosen Automatic looper operator
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DE1660956C3 (de) * 1966-10-28 1974-07-25 Officina Meccanica Di Precisione Exacta Di Peloggio Achille, Cardano Giovanni & C., Brignano D'adda (Italien) Vorrichtung zum automatischen Aufstoßen von Strickwaren auf den Fonturennadelkranz einer Kettelmaschine
DE2027447C3 (de) * 1970-06-04 1975-01-23 Franz Falke-Rohen, Strumpfwarenfabriken, Gmbh, 5948 Schmallenberg Verfahren und Vorrichtung zum maschenrethengerechten Aufstoßen gestrickter Ware
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103789932A (zh) * 2013-11-22 2014-05-14 诸暨市实干针织机械有限公司 一种全自动直式袜子缝头机
CN103789932B (zh) * 2013-11-22 2015-02-25 诸暨市实干针织机械有限公司 一种全自动直式袜子缝头机

Also Published As

Publication number Publication date
EP0555502A1 (de) 1993-08-18
ATE155178T1 (de) 1997-07-15
DE69220772D1 (de) 1997-08-14
DE69220772T2 (de) 1998-02-12
ES2103839T3 (es) 1997-10-01

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