EP0636730B1 - Procedure and device for automatically positioning stockings in a machine to form panty hose - Google Patents

Procedure and device for automatically positioning stockings in a machine to form panty hose Download PDF

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Publication number
EP0636730B1
EP0636730B1 EP94830313A EP94830313A EP0636730B1 EP 0636730 B1 EP0636730 B1 EP 0636730B1 EP 94830313 A EP94830313 A EP 94830313A EP 94830313 A EP94830313 A EP 94830313A EP 0636730 B1 EP0636730 B1 EP 0636730B1
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EP
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Prior art keywords
stocking
clamp
stockings
fact
relation
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German (de)
French (fr)
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EP0636730A1 (en
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Pier Lorenzo Migliorini
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Solis SRL
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Solis SRL
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    • 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
    • D05B23/008—Line closers, i.e. sewing units for forming the body portion of the panty hose

Definitions

  • the present invention relates to a method and a device for the automatic positioning of the stockings in a machine for forming tights, with the automatic detection of the garter line.
  • two stockings must first be threaded, individually, on a pair of flat shapes, paired, superimposed and, then, aligned vertically and juxtaposed, so as to obtain the correspondence of the elastic edges of the body of the two stockings and the corresponding garter lines, which determine the dividing line between two areas of the stockings with fabric of different density, as is the case for the body and leg of each stocking.
  • the two stockings thus positioned must be cut longitudinally, from the elastic edge of the body to a predetermined distance from the garter line.
  • the technical solutions known to date, for placing the two stockings to be united in a predetermined position to form a pantyhose arise, essentially, from the same origin.
  • the two stockings are threaded, randomly, on the respective support forms; then, optical sensors, movable in the longitudinal direction of the shapes, detect the position of the elastic edges of the bodies to control - with a horizontal translation towards the end of the shapes which is opposite the tip - the activation of first clamping means for picking up said edges to drive them to a predetermined position of reciprocal vertical alignment; successively, by means of second clamp or track means which act on the lateral portion of the stockings threaded on the forms and are controlled by second optical sensors, translate the stockings towards the point of the forms, until depositing in an extended position the portion of each stocking comprised between the elastic edge of the body and the garter line and until the vertical alignment of the two garter lines is obtained.
  • the main object of the present invention is to provide a method and a device for positioning two stockings intended to be united to form a pantyhose, which make it possible to obtain a significant reduction in the cost of manufacturing machines for pantyhose, as well as time required to position the stockings, while at the same time guaranteeing high operating reliability.
  • the advantages obtained thanks to the present invention essentially consist in the fact that it is possible to carry out the correct alignment of the garter lines of the two stockings to be joined to form the tights, in a simple, rapid and precise manner; in that a device according to the invention is simple, economical and reliable to manufacture even after a long period of operation.
  • FIG. 1A schematically represents a side view of a device according to the invention, in the rest position;
  • Fig. 1B shows the device of FIG. 1A in the advancement phase with opening of the clamp to grab a stocking;
  • Fig. 1C shows the device of FIG. 1A in the gripping phase of a lateral portion of the bottom;
  • Fig. 1D represents the device of FIG. 1A in the retraction phase with stretching from the bottom;
  • Fig. 1E shows the device of FIG.
  • FIG. 2A shows a plan view of the device of FIG. 1A
  • Fig. 2B shows a plan view of the device of FIG. 1B
  • Fig. 2C shows a plan view of the device of FIG. 1 C
  • Fig. 2D represents a plan view of the device of FIG. 1D
  • Fig. 2E shows a plan view of the device of FIG. 1E
  • Fig. 3 schematically represents the plan view of a device according to the invention, according to an alternative form of implementation.
  • said clamp means (1) are slaved to an alternative translation in the oblique direction (F1) relative to the longitudinal axis (8) of the corresponding shape (5).
  • said clamp (1) is of the type with normally closed flat jaws (15).
  • a stop element (6) is interposed between the head of the clamp (1) and the corresponding control cylinder (2), so as to limit the operational return stroke of the clamp (1) and exert a push on the back of each jaw (15) and generate a moment of opening of the clamp (1) and release of the bottom (4).
  • an elastic blade (10) is mounted astride, longitudinally, on the two jaws (15) of said clamp (1) so as to allow its spontaneous closing in the rest position.
  • said cam (3) has a double rectilinear profile with symmetrically divergent development towards the form (5) of bottom support (4) for controlling activation, that is to say the opening and respectively closing of said clamp (1), in cooperation with two axes (11), each of which is housed idly in a corresponding jaw (15) of the clamp (1), so as to be laterally projecting from it and thus cooperating with a corresponding profile of the cam (3) during the movement of the clamp (1): said cam (3) being interposed between the cylinder (2) for movement of the clamp (1) and the shape (5) of bottom support (4).

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Socks And Pantyhose (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Knitting Machines (AREA)
  • Sewing Machines And Sewing (AREA)

Description

La présente invention a pour objet un procédé et un dispositif pour le positionnement automatique des bas dans une machine pour former des collants, avec la détection automatique de la ligne de jarretière.The present invention relates to a method and a device for the automatic positioning of the stockings in a machine for forming tights, with the automatic detection of the garter line.

Il est connu que pour fabriquer un collant, deux bas doivent être tout d'abord enfilés, individuellement, sur une paire de formes plates, jumelées, superposées et, ensuite, alignés verticalement et juxtaposés, de manière à obtenir la correspondance des bords élastiques des corps des deux bas et les lignes de jarretière correspondantes, lesquelles déterminent la ligne de démarcation entre deux zones des bas avec tissu de densité différente, comme cela est le cas pour le corps et la jambe de chaque bas. Successivement, les deux bas ainsi positionnés doivent être découpés longitudinalement, à partir du bord élastique du corps jusqu'à une distance prédéterminée de la ligne de jarretière. Successivement, les bords juxtaposés des deux bas ainsi découpés doivent être cousus ensemble pour former le collant: la couture étant effectuée sur toute la longueur des bords.
Il s'ensuit que, pour effectuer la coupe et la couture d'union successive des deux bas avec la précision requise, il est nécessaire que chaque bas soit correctement positionné sur la forme de support respective, dans le sens de l'alignement vertical exact entre les bords élastiques et les lignes de jarretière des deux bas, et que les lignes de jarretière elles mêmes soient clairement détectées.
Pour permettre la détection automatique de la ligne de jarretière des bas, on connaît des dispositifs comprenant des capteurs optiques qui sont sensibles à la différence de densité entre le tissu du corps et celui de la jambe des bas. Mais, pour que la détection optique effectuée par des capteurs optiques soit correcte et précise, il est nécessaire que les bas soient disposés dans une position tendue, c'est-à-dire sans plis, de manière à éviter de fausses détections dues, par exemple, à la superposition de deux portions de tissu de la même densité.It is known that to make a pantyhose, two stockings must first be threaded, individually, on a pair of flat shapes, paired, superimposed and, then, aligned vertically and juxtaposed, so as to obtain the correspondence of the elastic edges of the body of the two stockings and the corresponding garter lines, which determine the dividing line between two areas of the stockings with fabric of different density, as is the case for the body and leg of each stocking. Successively, the two stockings thus positioned must be cut longitudinally, from the elastic edge of the body to a predetermined distance from the garter line. Successively, the juxtaposed edges of the two stockings thus cut must be sewn together to form the pantyhose: the sewing is carried out over the entire length of the edges.
It follows that, in order to carry out the successive cutting and sewing of union of the two stockings with the required precision, it is necessary that each stocking is correctly positioned on the respective support form, in the direction of the exact vertical alignment between the elastic edges and the garter lines of the two bottoms, and that the garter lines themselves are clearly detected.
In order to allow automatic detection of the stocking garter line, devices are known which include optical sensors which are sensitive to the difference in density between the tissue of the body and that of the leg of the stockings. But, for the optical detection carried out by optical sensors to be correct and precise, it is necessary that the stockings are arranged in a taut position, that is to say without wrinkles, so as to avoid false detections due, for example, by superimposing two portions of fabric of the same density.

Les solutions techniques connues à ce jour, pour disposer dans une position prédéterminée les deux bas à unir pour former un collant découlent, essentiellement, d'une même origine. Les deux bas sont enfilés, de manière aléatoire, sur les formes de support respectives; ensuite, des capteurs optiques, mobiles suivant la direction longitudinale des formes, détectent la position des bords élastiques des corps pour commander - avec une translation horizontale vers l'extrémité des formes qui est opposée à la pointe - l'activation de premiers moyens à pince destinés à prélever lesdits bords pour les entraîner jusqu'à une position prédéterminée d'alignement vertical réciproque; successivement, par l'intermédiaire de deuxièmes moyens à pince ou à chenilles qui agissent sur la portion latérale des bas enfilés sur les formes et sont commandés par des deuxièmes capteurs optiques, effectuer la translation des bas vers la pointe des formes, jusqu'à déposer dans une position étendue la portion de chaque bas comprise entre le bord élastique du corps et la ligne de jarretière et jusqu'à obtenir l'alignement vertical des deux lignes de jarretière. Ceci est également décrit dans le document US 4.541.351.
Mais la mise en oeuvre pratique de cette méthodologie entraîne différents inconvénients. L'inconvénient principal consiste dans le fait qu'il faut déplacer le bord élastique et la jambe de chaque bas durant deux phases distinctes et au moyen d'organes de positionnement différents, lesquels agissent séparément. Ceci entraîne une plus grande complexité de construction des dispositifs destinés à cette opération, aux dépends de l'économie de fabrication et d'exploitation de ces dispositifs.The technical solutions known to date, for placing the two stockings to be united in a predetermined position to form a pantyhose arise, essentially, from the same origin. The two stockings are threaded, randomly, on the respective support forms; then, optical sensors, movable in the longitudinal direction of the shapes, detect the position of the elastic edges of the bodies to control - with a horizontal translation towards the end of the shapes which is opposite the tip - the activation of first clamping means for picking up said edges to drive them to a predetermined position of reciprocal vertical alignment; successively, by means of second clamp or track means which act on the lateral portion of the stockings threaded on the forms and are controlled by second optical sensors, translate the stockings towards the point of the forms, until depositing in an extended position the portion of each stocking comprised between the elastic edge of the body and the garter line and until the vertical alignment of the two garter lines is obtained. This is also described in document US 4,541,351.
However, the practical implementation of this methodology entails various drawbacks. The main drawback consists in the fact that it is necessary to move the elastic edge and the leg of each stocking during two distinct phases and by means of different positioning members, which act separately. This leads to greater complexity in the construction of the devices intended for this operation, at the expense of the economy of manufacturing and operating these devices.

Le but principal de la présente invention est de proposer un procédé et un dispositif pour le positionnement de deux bas destinés à être unis pour former un collant, qui permettent d'obtenir une réduction sensible du coût de fabrication des machines pour collants, tout comme du temps nécessaire pour effectuer le positionnement des bas, en garantissant en même temps une grande fiabilité d'exploitation.The main object of the present invention is to provide a method and a device for positioning two stockings intended to be united to form a pantyhose, which make it possible to obtain a significant reduction in the cost of manufacturing machines for pantyhose, as well as time required to position the stockings, while at the same time guaranteeing high operating reliability.

Ce résultat a été atteint, conformément à l'invention, en adoptant un procédé comprenant une phase initiale qui consiste à charger chaque bas sur une forme de support correspondante, de manière aléatoire, et qui prévoit, dans l'ordre, les autres phases suivantes:

  • prélever et retenir une portion latérale limitée du tissu de chaque bas;
  • rétracter, une ou plusieurs fois, ladite portion de tissu ainsi retenue, dans la direction transversale ou oblique centrifuge par rapport à l'axe longitudinal de la forme correspondante, de ce qui est suffisant pour permettre la mise en tension des mailles qui forment le tissu et le rappel successif dans la direction de l'axe longitudinal de la forme de la portion de bas qui comprend la ligne de jarretière, jusqu'à ce que celle-ci se trouve dans la position prédéterminée par rapport à la forme correspondante;
  • relâcher le bas avec la ligne de jarretière ainsi positionnée.
This result has been achieved in accordance with the invention, by adopting a method comprising an initial phase which consists in loading each stocking on a corresponding support form, in a random manner, and which provides, in order, for the following other phases:
  • remove and retain a limited lateral portion of the fabric from each stocking;
  • retract, one or more times, said portion of tissue thus retained, in the transverse or oblique direction centrifugal with respect to the longitudinal axis of the corresponding shape, of what is sufficient to allow the tensioning of the meshes which form the tissue and the successive return in the direction of the longitudinal axis of the shape of the bottom portion which includes the garter line, until the latter is in the predetermined position relative to the corresponding shape;
  • release the bottom with the garter line thus positioned.

Et pour ce qui concerne le dispositif pour mettre en oeuvre ledit procédé, comprenant deux formes plates jumelées horizontales pour le support de deux bas, celui-ci est constitué de:

  • des moyens à pince pour la préhension d'une portion latérale limitée d'un bas enfilé sur la forme de support correspondante, et ceci en correspondance d'un bord latéral de la forme;
  • des moyens de support et d'entraînement à commande pneumatique desdits moyens à pince, en direction orthogonale ou oblique centrifuge par rapport à l'axe longitudinal de la forme, entre une position rétractée de début de course et une position avancée de fin de course en correspondance de la forme et inversement;
  • des moyens à came pour activer la préhension et respectivement le relâchement du bas de la part desdits moyens à pince;
  • au moins un capteur optique, pour chaque forme, lequel est disposé en correspondance d'une position prédéterminée d'alignement des lignes de jarretière des deux bas et lequel est associé à la pince qui agit sur la forme correspondante, pour commander sa désactivation au terme du positionnement.
And as regards the device for implementing said method, comprising two horizontal twin flat shapes for the support of two stockings, this consists of:
  • clamp means for gripping a limited lateral portion of a stocking threaded onto the corresponding support form, and this in correspondence with a lateral edge of the form;
  • pneumatically controlled support and drive means of said clamp means, in the orthogonal or oblique direction centrifugal by relative to the longitudinal axis of the form, between a retracted position for the start of a race and an advanced position for the end of the race in correspondence with the shape and vice versa;
  • cam means for activating the gripping and respectively the release of the bottom from said gripper means;
  • at least one optical sensor, for each shape, which is arranged in correspondence with a predetermined position of alignment of the garter lines of the two bottoms and which is associated with the clip which acts on the corresponding shape, to control its deactivation at the end positioning.

Les avantages obtenus grâce à la présente invention consistent essentiellement en ce qu'il est possible d'effectuer l'alignement correct des lignes de jarretière des deux bas à unir pour former le collant, de manière simple, rapide et précise; en ce qu'un dispositif conformément à l'invention est de fabrication simple, économique et fiable même après une longue période de fonctionnement.The advantages obtained thanks to the present invention essentially consist in the fact that it is possible to carry out the correct alignment of the garter lines of the two stockings to be joined to form the tights, in a simple, rapid and precise manner; in that a device according to the invention is simple, economical and reliable to manufacture even after a long period of operation.

Ces avantages et caractéristiques de l'invention ainsi que d'autres seront plus et mieux compris de chaque homme du métier à la lumière de la description qui va suivre et à l'aide des dessins annexés donnés à titre d'exemplification pratique de l'invention, mais à ne pas considérer dans le sens limitatif; dessins sur lesquels: la Fig. 1A représente schématiquement une vue de côté d'un dispositif conformément à l'invention, dans la position de repos; la Fig. 1B représente le dispositif de la Fig. 1A dans la phase d'avancement avec ouverture de la pince pour saisir un bas; la Fig. 1C représente le dispositif de la Fig. 1A dans la phase de préhension d'une portion latérale du bas; la Fig. 1D représente le dispositif de la Fig. 1A dans la phase de rétraction avec étirement du bas; la Fig. 1E représente le dispositif de la Fig. 1D en fin de course de la pince avec relâchement du bas; la Fig. 2A représente une vue en plan du dispositif de la Fig. 1A; la Fig. 2B représente une vue en plan du dispositif de la Fig. 1B; la Fig. 2C représente une vue en plan du dispositif de la Fig. 1C; la Fig. 2D représente une vue en plan du dispositif de la Fig. 1D; la Fig. 2E représente une vue en plan du dispositif de la Fig. 1E; la Fig. 3 représente schématiquement la vue en plan d'un dispositif conformément à l'invention, suivant une forme alternative de mise en oeuvre.These advantages and characteristics of the invention as well as others will be more and better understood by each person skilled in the art in the light of the description which will follow and with the aid of the appended drawings given by way of practical example of the invention, but not to be considered in the limiting sense; drawings in which: FIG. 1A schematically represents a side view of a device according to the invention, in the rest position; Fig. 1B shows the device of FIG. 1A in the advancement phase with opening of the clamp to grab a stocking; Fig. 1C shows the device of FIG. 1A in the gripping phase of a lateral portion of the bottom; Fig. 1D represents the device of FIG. 1A in the retraction phase with stretching from the bottom; Fig. 1E shows the device of FIG. 1D at the end of the gripper stroke with release of the bottom; Fig. 2A shows a plan view of the device of FIG. 1A; Fig. 2B shows a plan view of the device of FIG. 1B; Fig. 2C shows a plan view of the device of FIG. 1 C; Fig. 2D represents a plan view of the device of FIG. 1D; Fig. 2E shows a plan view of the device of FIG. 1E; Fig. 3 schematically represents the plan view of a device according to the invention, according to an alternative form of implementation.

Réduit à sa structure essentielle et en référence aux Fig. 1A-2E des dessins annexés, un procédé pour disposer deux bas dans la condition d'alignement vertical des lignes de jarretière respectives dans une machine pour fabriquer les collants, et comprenant une phase initiale qui consiste à enfiler de manière aléatoire chaque bas (4) sur une forme de support (5) correspondante, conformément à l'invention, prévoit de:

  • prélever et retenir une portion latérale limitée du tissu de chaque bas (4), en correspondance des deux bords latéraux de la forme (5) correspondante;
  • rétracter, une ou plusieurs fois, lesdites portions de chaque bas (4) ainsi retenues, dans la direction transversale centrifuge par rapport à l'axe longitudinal (8) de la forme (5) correspondante, sur une longueur suffisante pour permettre la traction des mailles qui forment le tissu élastique du bas et le rappel successif (voir la flèche F sur la Fig. 2D), dans la direction de l'axe longitudinal (8) de la forme (5), de la portion de bas qui comprend la ligne de jarretière (14), jusqu'à ce que celle-ci se trouve dans la position prédéterminée par rapport à la forme (5); et enfin,
  • relâcher chaque bas (4) avec la ligne de jarretière (14) ainsi positionnée.
Reduced to its essential structure and with reference to Figs. 1A-2E of the accompanying drawings, a method for placing two stockings in the condition of vertical alignment of the respective garter lines in a machine for manufacturing the tights, and comprising an initial phase which consists in randomly threading each stocking (4) on a corresponding support form (5), in accordance with the invention, provides for:
  • take and retain a limited lateral portion of the fabric of each stocking (4), corresponding to the two lateral edges of the corresponding shape (5);
  • retract, one or more times, said portions of each stocking (4) thus retained, in the centrifugal transverse direction relative to the longitudinal axis (8) of the corresponding shape (5), over a length sufficient to allow the traction of the meshes which form the elastic fabric of the bottom and the successive return (see arrow F in Fig. 2D), in the direction of the longitudinal axis (8) of the shape (5), of the portion of bottom which comprises the garter line (14), until the latter is in the predetermined position relative to the form (5); and finally,
  • release each stocking (4) with the garter line (14) thus positioned.

En alternative, en référence à la Fig. 3 des dessins annexés, il est prévu de rétracter lesdites portions latérales du tissu de chaque bas (4) dans la direction oblique centrifuge (F1) par rapport à l'axe longitudinal (8) de la forme (5) correspondante.Alternatively, with reference to FIG. 3 of the accompanying drawings, provision is made to retract said lateral portions of the fabric of each stocking (4) in the oblique centrifugal direction (F1) relative to the longitudinal axis (8) of the corresponding shape (5).

Pour ce qui est du dispositif pour mettre en oeuvre ledit procédé, et comprenant une paire de formes (5) jumelées plates horizontales et superposées, lesquelles servent de support pour les deux bas, il comprend:

  • des moyens à pince (1) pour la préhension d'une portion latérale limitée du tissu de chaque bas (4) enfilé sur la forme de support (5) correspondante, et ceci en correspondance des bords latéraux de la forme (5);
  • des moyens de support et d'entraînement desdits moyens à pince (1), dans la direction orthogonale par rapport à l'axe longitudinal (8) de la forme (5), entre une position rétractée de début de course et une position avancée de fin de course en correspondance de la forme et inversement, avec un cylindre pneumatique (2) à axe horizontal, orthogonal à l'axe (8) de la forme (5);
  • des moyens à came (3) pour activer la préhension et respectivement le relâchement du bas (4) de la part desdits moyens à pince (1);
  • au moins un capteur optique (13), pour chaque forme (5), lequel est disposé en correspondance d'une position prédéterminée d'alignement des lignes de jarretière des deux bas (4) et lequel est associé au cylindre (2) d'entraînement de la pince (1) relative à la forme (5) correspondante, pour commander sa désactivation au terme du positionnement.
With regard to the device for implementing said method, and comprising a pair of horizontal overlapping flat shapes (5) which serve as support for the two stockings, it comprises:
  • gripper means (1) for gripping a limited lateral portion of the fabric of each stocking (4) threaded onto the corresponding support form (5), and this in correspondence with the lateral edges of the shape (5);
  • means for supporting and driving said clamp means (1), in the direction orthogonal to the longitudinal axis (8) of the form (5), between a retracted position for starting the stroke and an advanced position for limit switch in correspondence of the shape and vice versa, with a pneumatic cylinder (2) with horizontal axis, orthogonal to the axis (8) of the shape (5);
  • cam means (3) for activating the gripping and respectively the release of the stocking (4) on the part of said clamp means (1);
  • at least one optical sensor (13), for each shape (5), which is arranged in correspondence with a predetermined position of alignment of the garter lines of the two bottoms (4) and which is associated with the cylinder (2) of drive of the clamp (1) relating to the corresponding shape (5), to control its deactivation after positioning.

En alternative, en référence à la Fig. 3 des dessins annexés, lesdits moyens à pince (1) sont asservis à une translation alternative dans la direction oblique (F1) par rapport à l'axe longitudinal (8) de la forme (5) correspondante. Avantageusement, conformément à l'invention, ladite pince (1) est du type à mâchoires (15) plates normalement fermées.Alternatively, with reference to FIG. 3 of the accompanying drawings, said clamp means (1) are slaved to an alternative translation in the oblique direction (F1) relative to the longitudinal axis (8) of the corresponding shape (5). Advantageously, in accordance with the invention, said clamp (1) is of the type with normally closed flat jaws (15).

Par ailleurs, avantageusement, conformément à l'invention, un élément (6) de butée est interposé entre la tête de la pince (1) et le cylindre de commande (2) correspondant, de manière à limiter la course opérationnelle de retour de la pince (1) et exercer une poussée sur le dos de chaque mâchoire (15) et engendrer un moment d'ouverture de la pince (1) et le relâchement du bas (4).Furthermore, advantageously, in accordance with the invention, a stop element (6) is interposed between the head of the clamp (1) and the corresponding control cylinder (2), so as to limit the operational return stroke of the clamp (1) and exert a push on the back of each jaw (15) and generate a moment of opening of the clamp (1) and release of the bottom (4).

Conformément à l'invention, une lame élastique (10) est montée à cheval, longitudinalement, sur les deux mâchoires (15) de ladite pince (1) de manière à permettre sa fermeture spontanée dans la position de repos.According to the invention, an elastic blade (10) is mounted astride, longitudinally, on the two jaws (15) of said clamp (1) so as to allow its spontaneous closing in the rest position.

Avantageusement, ladite came (3) est à double profil rectiligne avec développement symétriquement divergent vers la forme (5) de support du bas (4) pour commander l'activation, c'est-à-dire l'ouverture et respectivement la fermeture de ladite pince (1), en coopération avec deux axes (11), chacun desquels est logé fou dans une mâchoire correspondante (15) de la pince (1), de manière à se trouver latéralement en saillie par rapport à celle-ci et à coopérer ainsi avec un profil correspondant de la came (3) durant le déplacement de la pince (1): ladite came (3) étant interposée entre le cylindre (2) de déplacement de la pince (1) et la forme (5) de support du bas (4).Advantageously, said cam (3) has a double rectilinear profile with symmetrically divergent development towards the form (5) of bottom support (4) for controlling activation, that is to say the opening and respectively closing of said clamp (1), in cooperation with two axes (11), each of which is housed idly in a corresponding jaw (15) of the clamp (1), so as to be laterally projecting from it and thus cooperating with a corresponding profile of the cam (3) during the movement of the clamp (1): said cam (3) being interposed between the cylinder (2) for movement of the clamp (1) and the shape (5) of bottom support (4).

La préhension et le relâchement successif, continu, desdites portions latérales de chaque bas (4) en provoque l'extension et la traction latérale et, en conséquence, le rappel de la ligne de jarretière (14) dans la direction de l'axe longitudinal (8) de la forme (5), vers la pince (1) respective. Cette opération est répétée jusqu'à ce que le capteur (13) détecte la présence de la ligne de jarretière (14) de chaque bas (4). A ce point, le bas (4) est relâché par la pince (1).The gripping and successive, continuous relaxation of said lateral portions of each stocking (4) causes its extension and lateral traction and, consequently, the recall of the garter line. (14) in the direction of the longitudinal axis (8) of the form (5), towards the clamp (1) respectively. This operation is repeated until the sensor (13) detects the presence of the garter line (14) of each bottom (4). At this point, the bottom (4) is released by the clamp (1).

Claims (8)

  1. Process for positioning two stockings in vertical alignment with the respective garter lines in a machine for the manufacture of tights, and comprising an initial phase which consists of the operation of provisionally slipping each stocking (4) over a corresponding support form (5), characterized by the fact that it includes the following further phases:
    - selecting and retaining a limited lateral position of the fabric of each stocking (4), corresponding to the two lateral edges of the relevant form (5);
    - retracting once or more the said retained position of each stocking (4) in the centrifugal transveral direction in relation to the longitudinal axis (8) of the corresponding form (5), over a sufficient length to enable the stitches forming the elastic fabric of the stocking to be drawn and to enable that position of the stocking which includes the garter line (14) to be subsequently returned in the direction of the longitudinal axis (8) of thus form, until the said garter line occupies the predetermined position in relation to the form (5), and finally
    - releasing each stocking (4) with the garter line (14) thus positioned.
  2. Process in accordance with Claim 1, characterized by the fact that the said retraction of the lateral positions of the fabric of each stocking (4) is carried out in the direction (F1) which is oblique in relation to the axis (8) of the corresponding form (5).
  3. Device for positioning two stockings in a machine for manufacturing tights in accordance with the process described in Claim 1, comprising a pair of coupled horizontal flat forms (5) serving as a support for the stockings, characterized by the fact that it comprises
    - clamping means (1) for gripping a limited lateral portion of the fabric of each stocking (4) fitted onto the corresponding support form (5), thus being effected in the position corresponding to a lateral edge of the form (5);
    - means for supporting and driving the said clamping means (1) in the direction orthogonal in relation in relation to the longitudinal axis (8) of the form (5), between a retracted initial position at the beginning of the travel and an advanced end-of-travel position corresponding to the said form and vice versa, with a pneumatic cylinder (2) with a horizontal axis, orthogonal to the axis (8) of the form (5);
    - cam means (3) for activating the respective operations of gripping and releasing the stocking (4) by the said clamping means (1);
    - at least one optical pick-up (13) for each form (5), positioned in a manner corresponding to predetermined alignment position of the garter lines of the two stockings (4), and associated with the driving cylinder (2) of the clamp (1) relating to the corresponding form (5) in order to de-activate it on the completion of the positioning operation.
  4. Device in accordance with Claim 3, characterized by the fact that the said clamping means (1) are subjected to an alternating traversing movement in the direction (F1) which is oblique in relation to the longitudinal axis (8) of the corresponding form (5).
  5. Device in accordance with Claim 4, characterized by the fact that the said clamp (1) is of the type having flat jaws (15) which are normally closed.
  6. Device in accordance with Claims 3 and 4, characterized by the fact that it comprises a thrust element (6) interposed between the head of the clamp (1) and the corresponding control cylinder (2) in such a way as to limit the operational return travel of the clamp (1) and exert a thrust on the back of each jaw (15) and bring about the opening of the clamp (1) and the release of the stocking (4).
  7. Device in accordance with Claim 3, characterized by the fact that it includes an elastic blade (10) which straddles the jaws (15) of the said clamp (1) longitudinally in such a way as to enable it to be automatically closed in the position of rest.
  8. Device in accordance with Claim 3, characterized by the fact that the said cam (3) has a rectilinear double profile diverging symmetrically in the direction of the support form (5) of the stocking (4), in order to activate, i.e. open and close respectively the said clamp (1), in co-operation with two shafts (11) each of which is mounted loose in a corresponding join (15) of the clamp (1), in such a way as to project laterally in relation to this latter and thus to interact with a corresponding profile of the cam (3) during the displacement of the clamp (1), the said cam (3) being interposed between the cylinder (2) for moving the clamp (1) and the support form 5 of the stocking (4).
EP94830313A 1993-07-29 1994-06-23 Procedure and device for automatically positioning stockings in a machine to form panty hose Expired - Lifetime EP0636730B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITFI930149A IT1262485B (en) 1993-07-29 1993-07-29 METHOD AND DEVICE FOR THE AUTOMATIC POSITIONING OF SOCKS IM MACHINE TO FORM TIGHTS
ITFI930149 1993-07-29

Publications (2)

Publication Number Publication Date
EP0636730A1 EP0636730A1 (en) 1995-02-01
EP0636730B1 true EP0636730B1 (en) 1997-08-27

Family

ID=11350568

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94830313A Expired - Lifetime EP0636730B1 (en) 1993-07-29 1994-06-23 Procedure and device for automatically positioning stockings in a machine to form panty hose

Country Status (7)

Country Link
US (1) US5477996A (en)
EP (1) EP0636730B1 (en)
JP (1) JPH07316901A (en)
CN (1) CN1106869A (en)
CA (1) CA2127236A1 (en)
DE (1) DE69405177T2 (en)
IT (1) IT1262485B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1278667B1 (en) * 1995-05-10 1997-11-27 Solis Srl PERFECT SOCK HOLDER SHAPE FOR SEWING MACHINE-COLLANTS
US6820497B2 (en) 2001-01-03 2004-11-23 Threadbear, Llc Method and apparatus for detecting and controlling orientation of articles for further processing
CN102048282B (en) * 2011-01-16 2013-02-27 浙江汇豪科技有限公司 Automatic butend sewing and crotch shearing combination machine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2154369A (en) * 1937-05-12 1939-04-11 Proctor & Schwartz Clamp for hosiery drying forms
FR1352234A (en) * 1963-01-03 1964-02-14 Heliot Maurice Ets Device to facilitate the scrolling of articles of hosiery treated on lasts
IT1153834B (en) * 1980-07-11 1987-01-21 Piero Ambrogini CONTROL AND IRONING EQUIPMENT FOR SHORTS MANUFACTURED
US4515299A (en) * 1981-04-03 1985-05-07 Intech Corporation Method for handling hosiery
JPS59218188A (en) * 1983-05-26 1984-12-08 株式会社タカトリ機械製作所 Automatic position determining method and apparatus of hose end part
DE3567490D1 (en) * 1985-05-24 1989-02-16 Solis Srl Process and apparatus for automatically positioning the toe end of a stocking at the open end of an everting tube for sewing purposes
IT1213838B (en) * 1987-10-16 1990-01-05 Solis Srl DEVICE FOR THE AUTOMATIC TRANSFER OF TIGHTS FROM A SINGLE MACHINE FOR SEWING TIGHTS TO A CONVEYOR OF PACKED TIGHTS
JPH03199461A (en) * 1989-12-26 1991-08-30 Takatori Haitetsuku:Kk Position determining device of sock attached to foot mold
DE4220543C1 (en) * 1992-06-23 1993-08-05 August Krempel Soehne Gmbh & Co, 7143 Vaihingen, De
JP3165980B2 (en) * 1992-09-17 2001-05-14 ヤマハ発動機株式会社 Remote-controlled helicopter

Also Published As

Publication number Publication date
EP0636730A1 (en) 1995-02-01
CA2127236A1 (en) 1995-01-30
CN1106869A (en) 1995-08-16
US5477996A (en) 1995-12-26
JPH07316901A (en) 1995-12-05
DE69405177D1 (en) 1997-10-02
IT1262485B (en) 1996-06-28
ITFI930149A1 (en) 1995-01-29
ITFI930149A0 (en) 1993-07-29
DE69405177T2 (en) 1998-03-26

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