EP0203243B1 - Process and apparatus for automatically positioning the toe end of a stocking at the open end of an everting tube for sewing purposes - Google Patents

Process and apparatus for automatically positioning the toe end of a stocking at the open end of an everting tube for sewing purposes Download PDF

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Publication number
EP0203243B1
EP0203243B1 EP85830124A EP85830124A EP0203243B1 EP 0203243 B1 EP0203243 B1 EP 0203243B1 EP 85830124 A EP85830124 A EP 85830124A EP 85830124 A EP85830124 A EP 85830124A EP 0203243 B1 EP0203243 B1 EP 0203243B1
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EP
European Patent Office
Prior art keywords
tubes
leg
grippers
tube
legs
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
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EP85830124A
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German (de)
French (fr)
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EP0203243A1 (en
Inventor
Vinicio Gazzarrini
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Solis SRL
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Solis SRL
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Publication date
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Priority to EP85830124A priority Critical patent/EP0203243B1/en
Priority to DE8585830124T priority patent/DE3567490D1/en
Priority to EP19850830193 priority patent/EP0204058B1/en
Priority to DE8585830193T priority patent/DE3565867D1/en
Priority claimed from EP19850830193 external-priority patent/EP0204058B1/en
Priority to US06/786,943 priority patent/US4620650A/en
Publication of EP0203243A1 publication Critical patent/EP0203243A1/en
Application granted granted Critical
Publication of EP0203243B1 publication Critical patent/EP0203243B1/en
Expired legal-status Critical Current

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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

Definitions

  • the invention relates to a method and a device for automatically placing, in any predefined position, the two tubular stockings of a pantyhose on the tubes of a pneumatic turning device of a machine for sewing sticky spikes in order to allow the correct and precise sewing of these points.
  • the tube of the pneumatic turning device is used to support the turned bottom and two lateral fins, sliding longitudinally with respect to said tube, are used to slide towards the sewing machine sewing bottom point.
  • an automatic device for placing the end of the stocking to be sewn in a predefined position of the tube of the pneumatic turning device, which comprises a position sensor (for example a photocell) fixed, able to recognize a detail (eg the open end) of the bottom, and devices to grip the bottom in correspondence with the side fins of the turner, to move it along the tube, first by forward, that is to say in the direction of its open end and in such a way that said bottom detail exceeds the sensor, then backward and until said bottom detail arrives in a position corresponding to that of sensor, which then controls the opening of the gripping gear.
  • a position sensor for example a photocell
  • This known device uses gripping devices which close on the bottom always in the same position relative to the tube and which advance the bottom always in a stroke of the same length; and since the open end of the bottom, at the end of the turning of the latter on the tube, results in a position which varies along a very wide margin, said gripping devices always close on the bottom to a certain distance from the end of it. Consequently, during the advancement from the bottom towards the free end of the tube, even if it takes place at low speed, numerous folds are formed in the termination area of the bottom, which is outside the gripping devices; To eliminate these folds, you must then pull the bottom back at low speed.
  • the main objective of the present invention is to eliminate the above-mentioned drawbacks.
  • the invention as characterized by the claims, solves the problem of sliding the two stockings of a pantyhose over the two finned tubes of a pneumatic turning device, from any initial position of each stocking towards the same predefined end position for both stockings, with a single and rapid approach run.
  • a mobile steering carriage parallel to the axis of the tubes of the turning device and carrying two probes detecting the position of the two bottoms and two pairs of pliers to drive the point sewing stockings along the lateral fins of the tubes of the turning device; while, during the course of the carriage towards the free end of the tubes, each probe individualizes a predetermined point detectable from the corresponding bottom, it commands the corresponding pair of pliers to close on the bottom so as to allow it to be drawn towards and until the end of the carriage stroke to which corresponds the automatic opening of all the clamps and leaving the final and predefined position of the stockings on the tubes of the turning device.
  • the advantages obtained thanks to the present invention essentially consist in the fact that it is possible to operate the prior turning of the stockings on the tubes of the turning device at a higher speed than that obtained up to now; that the stockings literally slide to the predefined position in a single approach run; that each stocking is always grasped at the height of its open end, whatever the starting position of each stocking; that the sliding of the two stockings is carried out at a very high speed and with the fabric in the stretched position; that it is possible to modify the release position of the bottom.
  • Figure 1 shows, schematically, the plan view of a machine for sewing ladies' tights with a device for placing the stockings on the two tubes of a pneumatic turning apparatus, produced in accordance with the present invention
  • Figure 2 shows, in perspective, the detail of the two finned tubes of a turning device of the machine of Figure 1 with the two bottoms placed in the position corresponding to the end of their turning
  • Figure 3 shows the plan view of a device according to the invention relating to the two tubes of the turning device of Figure 2, in the end of empty travel position
  • Figure 4 shows the front view of the device of Figure 3
  • Figure 5 shows the left side view of the device of Figure 3
  • Figure 6 shows the section along A-A of Figure 3
  • Figure 7 shows the plan view of the device of Figure 3 in the start of sliding position from the bottom
  • Figure 8 shows the front view of the device of Figure 7
  • Figure 9 shows the left side view of the device of Figure 7
  • Figure 10 shows the plan view of the device of Figure 3 in the end of sliding position of the two bottoms
  • the method for automatically placing the tubular stockings of a pantyhose on the tubes of a pneumatic turning device of a machine for sewing the pantyhose points comprising the mechanical return of the stockings from the interior of the tubes and forced sliding of the stockings on the side fins tubes, allows, successively: (a) to explore the stockings along one of their generators and to detect, by means of two photo-electronic probes, the initial position of a predetermined index point, of each stocking held stationary on the corresponding tube; (b) close on each bottom, in correspondence with the fins of the corresponding tube and on command of the corresponding photoelectronic probe, when the latter has detected the predetermined index point at the bottom, two corresponding pliers to slide the end to be sewn from each stocking to the predefined end position of the corresponding tube; (c) to move the two pairs of pliers thus closed with the end of the stockings to be sewn along the fins of the tubes towards the free end
  • Said index point of the stockings can obviously be the limit between the reinforcement of the point and the rest of the bottom or the end of the bottom or even a particular sign, such as a dark colored thread, previously inserted in the woven fabric of the bottom.
  • Each pair of contiguous stirrups 50 is associated with two horizontal jaws 52 and 52 ′, articulated on the upper and lower arms respectively, corresponding stirrups 50 and connected together by means of a system of levers 53 to form two corresponding clamps (52, 52 ') which close longitudinally and on either side on the lateral fins 11 of each tube 10, under the effect of two return springs 54 and, on the contrary, open by the action of a pneumatic cylinder 55.
  • Each of said probes 56 is connected to a corresponding cylinder 55 so as to effect, separately, the closing of the corresponding clamps (52, 52 ') on the fins 11 of the two tubes 10 when, after each bottom 3 was explored separately under the effect of the movement of the carriage 5, the predetermined index point 30 of each stocking 3 was detected.
  • each of said cylinders 55 is slaved to a single switch 57 of the end of travel of the carriage 5 so as to defuse all the clamps (52, 52 ') and thus cause the immobilization of the two bottoms 3 in the predefined position on the two tubes 10.
  • two probes 56 for each tube 10 ′ of the pneumatic turning device arranged above the tube, near the lateral fins, one associated with a clamp ( 52, 52 ') and the other associated with the other clamp and two corresponding cylinders 55 enabling the clamps (52, 52') to be actuated separately, so as to allow the bottom to be grasped on the two fins 11 of the tube 10 at different times and in such a way that the open end of the bottom, which at the end of the turning would be oriented obliquely to the axis of the tube itself, is arranged, at the end of the sliding, so perpendicular to the axis of the tube 10.
  • the carriage 5 immediately performs its return stroke, during which each of the two probes 56 begins by longitudinally exploring the corresponding bottom 3 and as soon as it has detected the predefined index point 30, it orders the defusing of the corresponding cylinder 55, thereby causing the closure of the corresponding clamps (52, 52 '); then, the end 31 of each bottom 3 is driven until the end of the return stroke of the carriage 5; once this has been achieved, by means of the switch 57, said carriage 5 controls the actuation of the two cylinders 55, thereby causing instantaneous opening of all the clamps (52, 52 ') and hence immobilization tips of the two bottoms 3, in the predefined position on the tubes 10.
  • the carousel 1 then advances by one step and carries the tubes 10 to the station D1: there the lateral fins 11 of one of the tubes 10, advancing the along the tube beyond its end, transport the end of the bottom corresponding to sewing in the area where the sewing cutter 4 is located which is at station D1; similarly, at the next station D2, the fins 11 of the other tube 10 will transport the end of the other stocking 3 to be sewn in front of the sewing machine 4 which is at said station D2 of the machine sew the tips.

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

Description

L'invention concerne un procédé et un dispositif pour placer automatiquement, dans une quelconque position prédéfinie, les deux bas tubulaires d'un collant sur les tubes d'un appareil de retournement pneumatique d'une machine à coudre les pointes de collant afin de permettre la couture correcte et précise de ces pointes.The invention relates to a method and a device for automatically placing, in any predefined position, the two tubular stockings of a pantyhose on the tubes of a pneumatic turning device of a machine for sewing sticky spikes in order to allow the correct and precise sewing of these points.

On sait que dans les machines à coudre les pointes de bas tubulaires le tube de l'appareil de retournement pneumatique sert à soutenir le bas retourné et deux ailettes latérales, coulissant longitudinalement par rapport audit tube, servent à faire glisser vers la machine à coudre la pointe du bas à coudre.We know that in sewing machines the tips of tubular stockings the tube of the pneumatic turning device is used to support the turned bottom and two lateral fins, sliding longitudinally with respect to said tube, are used to slide towards the sewing machine sewing bottom point.

On connaît en outre, suite au brevet GB 1.577.758, un dispositif automatique pour placer l'extrémité du bas à coudre dans une position prédéfinie du tube de l'appareil de retournement pneumatique, lequel comprend un capteur de position (par ex. une photocellule) fixe, apte à reconnaître un détail (par ex. l'extrémité ouverte) du bas, et des engins pour saisir le bas en correspondance avec les ailettes latérales du retourneur, pour le faire avancer le long du tube, d'abord en avant, c'est-à-dire dans le sens de son extrémité ouverte et de façon que ledit détail du bas dépasse le capteur, puis en arrière et ce jusqu'à ce que ledit détail du bas arrive dans une position correspondant à celle du capteur, lequel commande alors l'ouverture des engins de prise.Furthermore, following GB 1,577,758, an automatic device is known for placing the end of the stocking to be sewn in a predefined position of the tube of the pneumatic turning device, which comprises a position sensor (for example a photocell) fixed, able to recognize a detail (eg the open end) of the bottom, and devices to grip the bottom in correspondence with the side fins of the turner, to move it along the tube, first by forward, that is to say in the direction of its open end and in such a way that said bottom detail exceeds the sensor, then backward and until said bottom detail arrives in a position corresponding to that of sensor, which then controls the opening of the gripping gear.

Ce dispositif connu utilise des engins de prise qui se referment sur le bas toujours dans la même position par rapport au tube et qui font avancer le bas toujours selon une course de même longueur ; et étant donné que l'extrémité ouverte du bas, à la fin du retournement de celui-ci sur le tube, résulte mise dans une position qui varie suivant une marge fort large, lesdits engins de prise se referment toujours sur le bas à une certaine distance de la fin de celui-ci. En conséquence, durant l'avancement du bas vers l'extrémité libre du tube, même s'il a lieu à faible vitesse, se forment de nombreux plis dans la zone de terminaison du bas, qui se trouve hors des engins de prise ; pour éliminer ces plis, il faut alors tirer le bas en arrière à faible vitesse.This known device uses gripping devices which close on the bottom always in the same position relative to the tube and which advance the bottom always in a stroke of the same length; and since the open end of the bottom, at the end of the turning of the latter on the tube, results in a position which varies along a very wide margin, said gripping devices always close on the bottom to a certain distance from the end of it. Consequently, during the advancement from the bottom towards the free end of the tube, even if it takes place at low speed, numerous folds are formed in the termination area of the bottom, which is outside the gripping devices; To eliminate these folds, you must then pull the bottom back at low speed.

L'objectif principal de la présente invention est d'éliminer les inconvénients susmentionnés. L'invention, telle qu'elle est caractérisée par les revendications, résout le problème de faire glisser les deux bas d'un collant sur les deux tubes à ailettes d'un appareil de retournement pneumatique, à partir d'une quelconque position initiale de chaque bas vers une même position finale prédéfinie pour les deux bas, avec une seule et rapide course d'approche.The main objective of the present invention is to eliminate the above-mentioned drawbacks. The invention, as characterized by the claims, solves the problem of sliding the two stockings of a pantyhose over the two finned tubes of a pneumatic turning device, from any initial position of each stocking towards the same predefined end position for both stockings, with a single and rapid approach run.

Conformément à l'invention, il est prévu d'utiliser un chariot mobile de direction parallèle à l'axe des tubes de l'appareil de retournement et portant deux sondes détectrices de la position des deux bas et deux couples de pinces pour entraîner la pointe des bas à coudre le long des ailettes latérales des tubes de l'appareil de retournement ; tandis que, durant la course du chariot vers l'extrémité libre des tubes, chaque sonde individualise un point prédéterminé décelable du bas correspondant, elle commande à la paire correspondante de pinces de se refermer sur le bas de façon à permettre de l'entraîner vers et jusqu'à la fin de la course du chariot à laquelle correspond l'ouverture automatique de toutes les pinces et partant la position finale et prédéfinie des bas sur les tubes de l'appareil de retournement.In accordance with the invention, it is planned to use a mobile steering carriage parallel to the axis of the tubes of the turning device and carrying two probes detecting the position of the two bottoms and two pairs of pliers to drive the point sewing stockings along the lateral fins of the tubes of the turning device; while, during the course of the carriage towards the free end of the tubes, each probe individualizes a predetermined point detectable from the corresponding bottom, it commands the corresponding pair of pliers to close on the bottom so as to allow it to be drawn towards and until the end of the carriage stroke to which corresponds the automatic opening of all the clamps and leaving the final and predefined position of the stockings on the tubes of the turning device.

Les avantages obtenus grâce à la présente invention consistent essentiellement en ce qu'il est possible d'opérer le retournement préalable des bas sur les tubes de l'appareil de retournement à une vitesse plus élevée de celle obtenue jusqu'à présent; que les bas glissent littéralement jusqu'à la position prédéfinie et ce en une seule course d'approche; que chaque bas est toujours saisi à la hauteur de son extrémité ouverte, quelle que soit la position de départ de chaque bas; que le glissement des deux bas est réalisé à une vitesse fort élevée et avec le tissu en position tendue; qu'il est possible de modifier la position de relâchement du bas.The advantages obtained thanks to the present invention essentially consist in the fact that it is possible to operate the prior turning of the stockings on the tubes of the turning device at a higher speed than that obtained up to now; that the stockings literally slide to the predefined position in a single approach run; that each stocking is always grasped at the height of its open end, whatever the starting position of each stocking; that the sliding of the two stockings is carried out at a very high speed and with the fabric in the stretched position; that it is possible to modify the release position of the bottom.

L'invention est exposée plus en détail dans les pages qui suivent, à l'aide des dessins qui en représentent un exemple d'exécution.The invention is explained in more detail in the following pages, with the aid of the drawings which represent an exemplary embodiment thereof.

La Figure 1 représente, schématiquement, la vue en plan d'une machine à coudre les pointes de collant de dames avec un dispositif pour placer les bas sur les deux tubes d'un appareil de retournement pneumatique, réalisé conformément à la présente invention ; la Figure 2 représente, en perspective, le détail des deux tubes à ailettes d'un appareil de retournement de la machine de la Figure 1 avec les deux bas mis dans la position correspondant à la fin de leur retournement ; la Figure 3 représente la vue en plan d'un dispositif conforme à l'invention relatif aux deux tubes de l'appareil de retournement de la Figure 2, en position de fin de course à vide; la Figure 4 représente la vue frontale du dispositif de la Figure 3 ; la Figure 5 représente la vue latérale gauche du dispositif de la Figure 3 ; la Figure 6 représente la section selon A-A de la Figure 3 ; la Figure 7 représente la vue en plan du dispositif de la Figure 3 en position de début de glissement du bas ; la Figure 8 représente la vue frontale du dispositif de la Figure 7 ; la Figure 9 représente la vue latérale gauche du dispositif de la Figure 7 ; la Figure 10 représente la vue en plan du dispositif de la Figure 3 en position de fin de glissement des deux bas ; la Figure 11 représente la vue frontale du dispositif de la Figure 10.Figure 1 shows, schematically, the plan view of a machine for sewing ladies' tights with a device for placing the stockings on the two tubes of a pneumatic turning apparatus, produced in accordance with the present invention; Figure 2 shows, in perspective, the detail of the two finned tubes of a turning device of the machine of Figure 1 with the two bottoms placed in the position corresponding to the end of their turning; Figure 3 shows the plan view of a device according to the invention relating to the two tubes of the turning device of Figure 2, in the end of empty travel position; Figure 4 shows the front view of the device of Figure 3; Figure 5 shows the left side view of the device of Figure 3; Figure 6 shows the section along A-A of Figure 3; Figure 7 shows the plan view of the device of Figure 3 in the start of sliding position from the bottom; Figure 8 shows the front view of the device of Figure 7; Figure 9 shows the left side view of the device of Figure 7; Figure 10 shows the plan view of the device of Figure 3 in the end of sliding position of the two bottoms; Figure 11 shows the front view of the device of Figure 10.

Conformément à la présente invention le procédé pour placer automatiquement les bas tubulaires d'un collant sur les tubes d'un appareil de retournement pneumatique d'une machine à coudre les pointes de collant comprenant le rappel mécanique des bas de l'intérieur des tubes et le glissement forcé des bas sur les ailettes latérales des tubes, permet, successivement : (a) d'explorer les bas le long d'une de leurs génératrices et de détecter, au moyen de deux sondes photo-électroniques, la position initiale d'un point-indice prédéterminé, de chaque bas tenu immobile sur le tube correspondant ; (b) de refermer sur chaque bas, en correspondance avec les ailettes du tube correspondant et sur commande de la sonde photo-électronique correspondante, alors que celle-ci a décelé le point-indice prédéterminé du bas, deux pinces correspondantes pour faire glisser l'extrémité à coudre de chaque bas vers la position finale prédéfinie du tube correspondant ; (c) de déplacer les deux couples de pinces ainsi refermées avec l'extrémité des bas à coudre le long des ailettes des tubes vers l'extrémité libre de ceux-ci et jusqu'à la fin de la course d'un chariot portant les sondes photo-électroniques et les pinces ; (d) d'ouvrir toutes les pinces, sur commande dudit chariot transporteur alors que celui-ci a atteint la fin de sa course, et ainsi de laisser les bas sur les tubes dans la même position prédéterminée.In accordance with the present invention, the method for automatically placing the tubular stockings of a pantyhose on the tubes of a pneumatic turning device of a machine for sewing the pantyhose points comprising the mechanical return of the stockings from the interior of the tubes and forced sliding of the stockings on the side fins tubes, allows, successively: (a) to explore the stockings along one of their generators and to detect, by means of two photo-electronic probes, the initial position of a predetermined index point, of each stocking held stationary on the corresponding tube; (b) close on each bottom, in correspondence with the fins of the corresponding tube and on command of the corresponding photoelectronic probe, when the latter has detected the predetermined index point at the bottom, two corresponding pliers to slide the end to be sewn from each stocking to the predefined end position of the corresponding tube; (c) to move the two pairs of pliers thus closed with the end of the stockings to be sewn along the fins of the tubes towards the free end of the latter and until the end of the travel of a carriage carrying the photo-electronic probes and clamps; (d) open all the clamps, on command of said transport carriage when the latter has reached the end of its travel, and thus leave the stockings on the tubes in the same predetermined position.

Ledit point-indice des bas peut manifestement être la limite entre le renforcement de la pointe et le reste du bas ou la fin du bas ou encore un signe particulier, tel un fil de couleur foncée, préalablement inséré dans le tissé du bas.Said index point of the stockings can obviously be the limit between the reinforcement of the point and the rest of the bottom or the end of the bottom or even a particular sign, such as a dark colored thread, previously inserted in the woven fabric of the bottom.

Le dispositif de réalisation dudit procédé conformément à l'invention comprend, en combinaison :

  • - un couple de tubes de retournement 10 horizontaux, placés côte à côte et faisant partie d'un bras d'un carrousel 1 à plusieurs bras, tournant, pas à pas, dans le sens contraire aux aiguilles d'une montre autour de son propre axe central, vertical. Ledit carrousel fait partie d'une machine à coudre les pointes de collant, à plusieurs stations (A-B-C-D1-D2-E), dans laquelle la station A est prévue pour l'alimentation automatique des collants en position retournée, position qui est obtenue grâce à un dispositif 2 qui ne fait pas l'objet de la présente invention ; la station B permet le rappel des jambes du collant de l'intérieur des deux tubes 10, en en complétant le retournement vers l'extérieur de ces tubes, au moyen de deux rouleaux correspondants 12 rotatifs, connus en tant que tels ; la station C permet de placer les deux bas 3 dans une position prédéterminée sur les tubes 10, grâce au dispositif qui fait l'objet de la présente invention ; les stations D1, D2 permettent la couture de la pointe 31 de l'un (le droit) et l'autre (le gauche) bas du collant, séparément, au moyen de deux machines correspondantes coupe-couture 4, connues en tant que telles : lesdites machines coupe-couture 4 effectuent en même temps la couture du bas droit et du bas gauche de deux collants différents ; la station E permet de redresser et d'éloigner, à main droite, le collant terminé, au moyen d'engins pneumatiques, connus en tant que tels ;
  • - un chariot 5, mobile en phase par rapport aux mouvements du carrousel 1, sur un rail 6 horizontal, disposé en dessous des deux tubes 10, arrêtés à la station C ; ledit chariot 5 porte dans s'a partie supérieure trois étriers 50, à profil vertical en forme de C, justaposés, orientés de manière parallèle auxdits tubes 10 et reliés entre eux par des traverses 51, de manière à laisser le passage libre pour les tubes 10 pendant la rotation, pas à pas, du carrousel 1.
The device for carrying out said method in accordance with the invention comprises, in combination:
  • - a couple of horizontal turning tubes 10, placed side by side and forming part of an arm of a carousel 1 with several arms, rotating, step by step, counterclockwise around its own central, vertical axis. Said carousel is part of a sewing machine for sticky points, at several stations (ABC-D1-D2-E), in which station A is provided for the automatic feeding of the tights in the inverted position, which position is obtained thanks to a device 2 which is not the subject of the present invention; station B allows the legs of the pantyhose to be brought back from the inside of the two tubes 10, by completing the reversal towards the outside of these tubes, by means of two corresponding rotary rollers 12, known as such; the station C makes it possible to place the two stockings 3 in a predetermined position on the tubes 10, thanks to the device which is the subject of the present invention; the stations D1, D2 allow the sewing of the point 31 of one (the right) and the other (the left) bottom of the tights, separately, by means of two corresponding cutting-seaming machines 4, known as such : said cutting-sewing machines 4 carry out at the same time the sewing of the bottom right and the bottom left of two different tights; station E makes it possible to straighten and move away, on the right hand, the finished tights, by means of pneumatic devices, known as such;
  • - A carriage 5, movable in phase relative to the movements of the carousel 1, on a horizontal rail 6, arranged below the two tubes 10, stopped at station C; said carriage 5 carries in its upper part three stirrups 50, with a vertical profile in the shape of a C, just seated, oriented in parallel with said tubes 10 and connected to each other by crosspieces 51, so as to leave free passage for the tubes 10 during the rotation, step by step, of carousel 1.

A chaque couple d'étriers 50 contigus sont associées deux mâchoires 52 et 52' horizontales, articulées sur le bras, respectivement supérieur et inférieur, des étriers correspondants 50 et reliées entre elles au moyen d'un système de leviers 53 pour former deux pinces correspondantes (52, 52') lesquelles se referment longitudinalement et de part et d'autre sur les ailettes latérales 11 de chaque tube 10, sous l'effet de deux ressorts de rappel 54 et, au contraire, s'ouvrent par action d'un cylindre pneumatique 55. A la traverse supérieure 51 sont associées deux sondes 56 photo- électroniques, alignées entre elles en direction transversale, au-dessus des tubes 10, chacune des sondes étant située en retrait par rapport aux deux extrémités des mâchoires 52 du tube correspondant 10 : la position de chacune des sondes 56 en direction parallèle à l'axe du tube 10 correspondant pouvant être réglée à volonté en rapport avec le point-indice 30 prédéfini du bas 3 et avec la position prédéterminée du bas sur le tube 10. Chacune desdites sondes 56 est reliée à un cylindre correspondant 55 de manière à effectuer, séparément, la fermeture des pinces correspondantes (52, 52') sur les ailettes 11 des deux tubes 10 lorsque, après que chaque bas 3 a été exploré séparément sous l'effet du mouvement du chariot 5, le point-indice prédéterminé 30 de chaque bas 3 a été décelé. Enfin, chacun desdits cylindres 55 est asservi à un seul interrupteur 57 de fin de course du chariot 5 de façon à désamorcer toutes les pinces (52, 52') et ainsi de provoquer l'immobilisation des deux bas 3 dans la position prédéfinie sur les deux tubes 10.Each pair of contiguous stirrups 50 is associated with two horizontal jaws 52 and 52 ′, articulated on the upper and lower arms respectively, corresponding stirrups 50 and connected together by means of a system of levers 53 to form two corresponding clamps (52, 52 ') which close longitudinally and on either side on the lateral fins 11 of each tube 10, under the effect of two return springs 54 and, on the contrary, open by the action of a pneumatic cylinder 55. With the upper cross-member 51 are associated two photoelectronic probes 56, aligned with one another in transverse direction, above the tubes 10, each of the probes being set back with respect to the two ends of the jaws 52 of the corresponding tube 10: the position of each of the probes 56 in the direction parallel to the axis of the corresponding tube 10 can be adjusted at will in relation to the predefined index point 30 at the bottom 3 and with the predetermined position from the bottom on the tube 10. Each of said probes 56 is connected to a corresponding cylinder 55 so as to effect, separately, the closing of the corresponding clamps (52, 52 ') on the fins 11 of the two tubes 10 when, after each bottom 3 was explored separately under the effect of the movement of the carriage 5, the predetermined index point 30 of each stocking 3 was detected. Finally, each of said cylinders 55 is slaved to a single switch 57 of the end of travel of the carriage 5 so as to defuse all the clamps (52, 52 ') and thus cause the immobilization of the two bottoms 3 in the predefined position on the two tubes 10.

Conformément à l'invention, il est également prévu d'utiliser deux sondes 56 pour chaque tube 10' de l'appareil de retournement pneumantique, disposées au-dessus du tube, à proximité des ailettes latérales, l'une associée à une pince (52, 52') et l'autre associée à l'autre pince et deux cylindres correspondants 55 permettant d'actionner les pinces (52, 52') séparément, de façon à permettre de saisir le bas sur les deux ailettes 11 du tube 10 à des moments différents et de façon à obtenir que l'extrémité ouverte du bas qui, à la fin du retournement se trouverait orientée en oblique par rapport à l'axe-même du tube, soit disposée, à la fin du glissement, de manière perpendiculaire par rapport à l'axe du tube 10.In accordance with the invention, it is also planned to use two probes 56 for each tube 10 ′ of the pneumatic turning device, arranged above the tube, near the lateral fins, one associated with a clamp ( 52, 52 ') and the other associated with the other clamp and two corresponding cylinders 55 enabling the clamps (52, 52') to be actuated separately, so as to allow the bottom to be grasped on the two fins 11 of the tube 10 at different times and in such a way that the open end of the bottom, which at the end of the turning would be oriented obliquely to the axis of the tube itself, is arranged, at the end of the sliding, so perpendicular to the axis of the tube 10.

Le fonctionnement a lieu comme suit. Tandis que le carrousel 1 avance d'un pas, le chariot 5 effectue une course d'aller à vide, c'est-à-dire avec les pinces (52, 52') ouvertes, vers le centre du carrousel 1 et lorsque les deux tubes 10 avec les deux bas 3 retournés sur ceux-ci atteignent la station C et s'y arrêtent, le chariot 5 est déjà arrivé à la fin de sa course d'aller et s'est arrêté. Le chariot 5 effectue immédiatement sa course de retour, durant laquelle, chacune des deux sondes 56 commence par explorer longitudinalement le bas correspondant 3 et aussitôt qu'elle a décelé le point-indice prédéfini 30, elle ordonne le désamorçage du cylindre correspondant 55, en provoquant ainsi la fermeture des pinces correspondantes (52, 52') ; ensuite, l'extrémité 31 de chaque bas 3 est entraînée jusqu'à la fin de la course de retour du chariot 5 ; une fois celle-ci atteinte, au moyen de l'interrupteur 57, ledit chariot 5 commande la mise en action des deux cylindres 55, en provoquant ainsi l'ouverture instantanée de toutes les pinces (52, 52') et partant l'immobilisation des pointes des deux bas 3, dans la position prédéfinie sur les tubes 10. Le carrousel 1 avance alors d'un pas et porte les tubes 10 à la station D1 : là les ailettes latérales 11 d'un des tubes 10, en avançant le long du tube au-delà de son extrémité, transportent l'extrémité du bas correspondant à coudre dans la zone où se trouve la machine coupe-couture 4 qui se trouve à la station D1 ; de même, à la station suivante D2, les ailettes 11 de l'autre tube 10 transporteront l'extrémité de l'autre bas 3 à coudre en face de la machine coupe-couture 4 qui se trouve à ladite station D2 de la machine à coudre les pointes.Operation takes place as follows. While the carousel 1 advances by one step, the carriage 5 carries out an empty travel, that is to say with the clamps (52, 52 ') open, towards the center of the carousel 1 and when the two tubes 10 with the two bottoms 3 turned over on them reach station C and stop there, the carriage 5 has already arrived at the end of its outward travel and has stopped. The carriage 5 immediately performs its return stroke, during which each of the two probes 56 begins by longitudinally exploring the corresponding bottom 3 and as soon as it has detected the predefined index point 30, it orders the defusing of the corresponding cylinder 55, thereby causing the closure of the corresponding clamps (52, 52 '); then, the end 31 of each bottom 3 is driven until the end of the return stroke of the carriage 5; once this has been achieved, by means of the switch 57, said carriage 5 controls the actuation of the two cylinders 55, thereby causing instantaneous opening of all the clamps (52, 52 ') and hence immobilization tips of the two bottoms 3, in the predefined position on the tubes 10. The carousel 1 then advances by one step and carries the tubes 10 to the station D1: there the lateral fins 11 of one of the tubes 10, advancing the along the tube beyond its end, transport the end of the bottom corresponding to sewing in the area where the sewing cutter 4 is located which is at station D1; similarly, at the next station D2, the fins 11 of the other tube 10 will transport the end of the other stocking 3 to be sewn in front of the sewing machine 4 which is at said station D2 of the machine sew the tips.

Claims (9)

1. A method for the automatic positioning of the tubular legs of tights on the two tubes of the pneumatic reversing apparatus of a machine for sewing the toes of tights comprising the mechanical recall of each leg (3) from the interior of the corresponding tube (10) with the turning inside out on the exterior of the tube and the forced sliding of each leg on the lateral flanges (11) of the tube (10), characterized in that it enables, in sequence :
a. The exploration of the two legs along one of their generatrices and the detection, by two photoelectronic probes (56), of the initial position of a predetermined reference point (30) of each leg (3) positioned on the corresponding tube (10) ;
b. The closure around each leg, at the location or the lateral flanges (11) of the corresponding tube (10), at the command of the corresponding photoelectronic probe (56) when the latter has detected the predetermined reference point (30) of the leg, of a corresponding pair of grippers (52, 52') so as to cause the end (31) to be sewn to slide towards the predetermined final position on the corresponding tube (10) ;
c. The displacement of the two pairs of grippers (52, 52') closed in this way together with the underlying end (31) of the leg (3) to be sewn along the flanges (11) of the tubes (10) towards the free end thereof and up to the end of the stroke of a carriage (5) moving in a direction parallel to the tubes (10) and bearing the photo-electronic probes (56) and the pairs of grippers (52, 52') ;
d. The opening of the two pairs of grippers (52, 52') at the command of the conveyor carriage (5) when the latter has reached the end of its stroke thus leaving the end (31) of the two legs (3) to be sewn in the predetermined position on the tubes (10).
2. A method as claimed in claim 1, characterized in that the closure of the two grippers (52, 52') entraining each leg (3) takes place at the open end thereof so as to ensure that the portion (31) to be sewn of the leg is entrained tautly over the entire length of the corresponding approach movement to the predetermined position on the corresponding tube (10).
3. A method as claimed in claim 1, characterized in that the closure of the two grippers (52, 52') entraining each leg takes place- at different times so that the end of each leg (3), which is initially oblique, is placed, at the end of sliding, perpendicular to the axis of the corresponding tube (10).
4. A device for the automatic positioning of the tubular legs of tights above the two tubes of the pneumatic reversing apparatus of a machine for sewing the toes of tights whose arms in the form of two tubes (10) form a horizontal spider (1) in accordance with the method as claimed in claims 1 to 3 and comprising means (12) for the recall of the legs (3) of the tights from the interior of the two tubes (10) completing their reversing on the exterior of theses tubes and gripper means (52, 52') for the forced sliding of each leg (3) on the lateral flanges (11) of the corresponding tube (10), characterized in that it comprises a carriage (5) iwhich can move in an alternating manner on a horizontal rail (6) parallel to the tubes (10) stopped at a station of the toe-sewing machine and bearing at least two photo-electronic probles (56) for the longitudinal exploration of the two legs (3) separately and the identification of their predetermined detectable point (30), two pairs of grippers (52, 52') for separately gripping the two legs (3) on the flanges (11) of the two tubes (10), at least two pneumatic cylinders (55) for the actuation of the two pairs of grippers (52, 52'), each of these being activated/disactivated by a corresponding probe (56) when the latter has detected the reference point (30) of the corresponding leg (3) and disac- tivated/activated by the same switch (57) for the end of the stroke of the carriage (5) such that each leg (3) is gripped, whather the end of the leg is positioned obliquely or perpendicular to the axis of the tube (10).
5. A device as claimed in claim 4, characterized in that the photo-electronic probes (56) for the exploration of the legs (3) are positioned above the tubes (10) in perpendicular alignment to the axis of the tubes (10) in an intermediate zone with respect to the jaws (52) of the corresponding grippers (52, 52') and to the rear with respect to the two ends of the jaws (52) to enable the ends (31) to be sewn of the legs (3) to slide tautly over the entire length of the corresponding approach stroke to the predetermined position on the tubes (10).
6. A device as claimed in claim 4, characterized in that the position of the probes (56) and of the switch (57) may be adjusted in the direction parallel to the longitudinal axis of the tubes (10) in order to enable a modification of the predetermined position of the leg (3) on the tubes (10) with respect to the point (30) of the leg (3) previously selected as the reference.
7. A device as claimed in claim 4, characterized in that the carriage (5) comprises three stirrups (50) with a vertical C-shaped profile which are justaposed and parallel to the tubes (10) so as to leave a free passage for the tubes (10) during the rotation of the spider (1) and in that the upper and lower jaws (52, 52') of the grippers (52, 52') are articulated on the upper and lower arms of the stirrups (50).
8. A device as claimed in claim 4, characterized in that the upper jaw (52) and the lower jaw (52') of each gripper (52, 52') are connected together by a system of levers (53) to enable its opening and closure at the command of a corresponding pneumatic cylinder (55) in cooperation with a recall spring (54).
9. A device as claimed in claim 4, characterized in that the carriage (5) carries out its empty outward stroke towards the centre of the spider (1) during the advance by one step of the latter, and its stroke entraining the leg (3) towards the free and of the tubes (10) during the stoppage of the spider (1).
EP85830124A 1985-05-24 1985-05-24 Process and apparatus for automatically positioning the toe end of a stocking at the open end of an everting tube for sewing purposes Expired EP0203243B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP85830124A EP0203243B1 (en) 1985-05-24 1985-05-24 Process and apparatus for automatically positioning the toe end of a stocking at the open end of an everting tube for sewing purposes
DE8585830124T DE3567490D1 (en) 1985-05-24 1985-05-24 Process and apparatus for automatically positioning the toe end of a stocking at the open end of an everting tube for sewing purposes
EP19850830193 EP0204058B1 (en) 1985-05-24 1985-07-25 Process and apparatus for automatically positioning the toe end of a stocking at the open end of an everting tube for sewing purposes
DE8585830193T DE3565867D1 (en) 1985-05-24 1985-07-25 Process and apparatus for automatically positioning the toe end of a stocking at the open end of an everting tube for sewing purposes
US06/786,943 US4620650A (en) 1985-05-24 1985-10-11 Method and apparatus for automatically positioning tubular pantyhose legs

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP85830124A EP0203243B1 (en) 1985-05-24 1985-05-24 Process and apparatus for automatically positioning the toe end of a stocking at the open end of an everting tube for sewing purposes
EP19850830193 EP0204058B1 (en) 1985-05-24 1985-07-25 Process and apparatus for automatically positioning the toe end of a stocking at the open end of an everting tube for sewing purposes

Publications (2)

Publication Number Publication Date
EP0203243A1 EP0203243A1 (en) 1986-12-03
EP0203243B1 true EP0203243B1 (en) 1989-01-11

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Application Number Title Priority Date Filing Date
EP85830124A Expired EP0203243B1 (en) 1985-05-24 1985-05-24 Process and apparatus for automatically positioning the toe end of a stocking at the open end of an everting tube for sewing purposes

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US (1) US4620650A (en)
EP (1) EP0203243B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9000463D0 (en) * 1990-01-09 1990-03-07 Flude & Hinckley Stocking positioning device
US5573851A (en) * 1994-05-16 1996-11-12 U.S. Textile Corporation Ultraviolet-detectable marking yarn and a textile fabric product therewith
FR2793815B1 (en) * 1999-05-20 2002-01-04 Innothera Topic Int MACHINE FOR SEWING THE TIP OF KNITTED TUBULAR ARTICLES SUCH AS BOTTOM AND THE LIKE, ESPECIALLY CONTAINING ARTICLES
EP3194646B1 (en) * 2014-09-11 2018-11-07 SANTONI S.p.A. Method and apparatus for sewing an open end of a tubular textile item to make the toe of a sock or of a leg of a stocking
EP3123881B1 (en) 2015-07-28 2018-11-21 Boggiani Renato S.r.l. Apparatus and method for the production of pantyhose without stitching on the body piece

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2166053A (en) * 1935-11-15 1939-07-11 Heliot Leon Pierre Device for the drawing upon forms, of articles to be finished, such as stockings and other hosiery goods
FR1583500A (en) * 1967-10-02 1969-10-31
JPS5416264B2 (en) * 1973-12-28 1979-06-21
GB1577758A (en) * 1977-04-02 1980-10-29 Detexomat Machinery Ltd Garment manufacture
IT1090252B (en) * 1979-02-07 1985-06-26 Solis Srl DEVICE FOR AUTOMATIC POSITIONING OF THE SEWING OF THE TUBULAR SOCKS WITH HEEL ON A PNEUMATIC REVERSER APPARATUS ESPECIALLY IN THE MACHINE FOR SEWING THE TOE OF THE TUBE SOCKS
US4421259A (en) * 1981-04-03 1983-12-20 Intech Corporation Method and apparatus for handling hosiery
US4487546A (en) * 1981-08-05 1984-12-11 Savio & C. S.P.A. Device for transferring tubular fabrics from support hangers to a rigid body and inverting the fabric
GB8303159D0 (en) * 1983-02-04 1983-03-09 Detexomat Machinery Ltd Transferring hosiery between manufacturing machines
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

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US4620650A (en) 1986-11-04
EP0203243A1 (en) 1986-12-03

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