EP0200675A2 - Loop taker with a rotary hook for a sewing machine - Google Patents

Loop taker with a rotary hook for a sewing machine Download PDF

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Publication number
EP0200675A2
EP0200675A2 EP86810121A EP86810121A EP0200675A2 EP 0200675 A2 EP0200675 A2 EP 0200675A2 EP 86810121 A EP86810121 A EP 86810121A EP 86810121 A EP86810121 A EP 86810121A EP 0200675 A2 EP0200675 A2 EP 0200675A2
Authority
EP
European Patent Office
Prior art keywords
thread
notch
bobbin
shoe
capsule
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.)
Withdrawn
Application number
EP86810121A
Other languages
German (de)
French (fr)
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EP0200675A3 (en
Inventor
Olindo Baruffa
Antonio Jimenez
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mefina SA
Original Assignee
Mefina SA
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 Mefina SA filed Critical Mefina SA
Publication of EP0200675A2 publication Critical patent/EP0200675A2/en
Publication of EP0200675A3 publication Critical patent/EP0200675A3/en
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/26—Bobbin holders or casings; Bobbin holder or case guards; Bobbin discharge devices
    • D05B57/265—Bobbin holders or casings; Bobbin holder or case guards; Bobbin discharge devices for looptakers with vertical axis

Definitions

  • the invention aims to simplify the initial factory setting.
  • the arcuate part being on at least a portion of the periphery of the can.
  • the adjustment lever being pivoted on a support mounted in an adjustable manner on the arcuate part, means allowing the fixing on the capsule of the assembly formed by the arcuate part, the shoe, the elastic blade, the lever and the adjustable support.
  • the loop sensor comprises a frame 1 carrying a fixed pivot 2 on which a cup 3 is rotatably mounted.
  • the rotation drive of this cup is obtained by a drive shaft 4 carrying a wheel 5 with oblique teeth, which meshes with another wheel 6 with oblique teeth integral with the bowl 3.
  • the latter is retained on the pivot 2 by means of a screw 7 and a washer 8, which is combined with at least one permanent magnet 9.
  • the upper part of the bowl 3 comprises a hook 10 intended to engage in the loop of the needle thread of the sewing machine.
  • the upper annular portion of the rotary bowl consists of two metal rings 12 and 13 overlapped.
  • the rings 12 and 13 have a notch 14 cut out so as to be integrated into the hook 10.
  • the lower ring 13 is cut to form the beak 15 of the hook used to catch the upper thread and to bring it into the notch 14 to pass it around the bobbin.
  • the rings 12 and 13 are made integral with the bowl 3, for example using screws 16, and constitute the guide and support surfaces of a capsule 17.
  • This capsule has a bearing surface 18 which rests on the ring 13. The lateral guidance of this capsule is produced by the surface of the internal diameter of the ring 12, which laterally retains the bearing surface 18.
  • the capsule 17 contains the bobbin 32 on which the lower thread is wound.
  • the thread of this bobbin is subjected to predetermined braking to obtain a certain tension of the thread during sewing.
  • the mechanism for adjusting the tension of this thread is shown on a larger scale in FIGS. 3 and 4.
  • This mechanism is entirely carried by an arcuate piece 33 which extends over a portion of the periphery of the bobbin 32 and constitutes a part of the wall of the housing in which the bobbin is placed.
  • This arcuate part has a notch 34 for the passage of the bobbin thread 35.
  • a shoe 36 presses the wire 35 against the outer surface of the arcuate part 33 from the notch 34, so as to exert braking on this wire when it is unwound.
  • the shoe 36 is subjected to the elastic action of a leaf spring 37 which is kept pressed against the shoe by means of a lever 38 for holding and adjusting.
  • This lever 38 is pivotally mounted on a support 39 on which pivots a cam 40 which acts on the adjustment lever 38.
  • the adjustment support 39 and the lever 38 are both articulated on a bearing screw 41, the threaded part of which is screwed into a tab 42 forming part of the arcuate part 33.
  • the support 39 is adjustable and its position can be adjusted using an adjustment screw 43 cooperating with a threaded bore provided in the part 33.
  • the screw 41 has a threaded portion long enough to pass through a hole in the capsule 17 and engage in a nut, not shown, allowing the assembly formed by the arcuate part 33, the shoe 36, the elastic blade to be screwed onto the capsule 17.
  • 37, the lever 38 and the adjustable support 39 The adjustment of the pressure of the shoe 36 on the wire 35 is obtained by modifying the position of the lever 38 relative to the part 33.
  • This position of the lever 38 is determined, from on the one hand, by the position of the support 39 which is adjusted at the factory by acting on the screw 43 and, on the other hand, by an action on the cam 40, which can be carried out by the user, using a screwdriver which it engages in a slot 44 of this cam, while retaining the initial factory setting.
  • the end of the shoe 36 which is shown in broken lines, has two guide fingers 45 and 46 between which the wire 35 must pass. These fingers are slightly curved and partially penetrate into an opening 47 in the end of the arched part 33. This end also carries a finger 48 defining a notch 49 through which the wire 35 must pass.
  • the notch 34 is constituted by a slot extending obliquely as far as the shoe 36, the relative positions between the bottom of this slot and the notch 49 being chosen so that the portion of wire 35 passing from the bottom of the slot to the notch 49 also passes between the fingers 45 and 46 of the skate.
  • the user need only insert the bobbin into the housing which is provided for this purpose in the capsule, then pull the thread to engage it in the notch 34 and to continue its traction by directing it towards a wire cutter 50 (FIG. 1) which is carried by the frame of the device. The wire then passes under the finger 48 and rests on the bottom of the notch 49.
  • the thread cutter is shaped so as to retain the thread coming out of the bobbin and / or the needle thread and its position is such that the length of the strands allows, without others, the start of the seam.
  • the direction of rotation of the bowl 3 is such that its hook approaches the finger 48 defining said notch 49 in the arched part 33 facing it, the length of this finger 48 being sufficient to retain the bobbin thread in the notch 49 and thus prevent the needle thread loop from pulling the bobbin thread out of the tension adjustment mechanism.

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

Abstract

The loop taker comprises a receptacle (17) housed in a rotating bowl with an uninterrupted edge (11). The hook (15) for capturing the loop of the needle thread is located on the inside of the bowl and has a notch (14) through which the thread is pulled in order to pass around the receptacle (17) containing a bobbin (32) for the lower thread. Two independent escapement levers (19 and 20) are alternately displaced by cams provided on the circumference of the bowl (3). This makes it possible for the needle thread to pass around the receptacle, while keeping the receptacle stationary. <IMAGE>

Description

On connaît déjà des dispositifs capteurs de boucle pour machine à coudre, comprenant un bâti portant une cuvette rotative munie d'un crochet près de son bord supérieur et présentant un logement pour recevoir une capsule portant une canette, cette capsule étant munie d'un mécanisme de réglage de la tension du fil de canette, ce mécanisme comprenant une pièce présentant une encoche pour le passage du fil de canette, un patin étant appliqué contre le fil sur la surface extérieure de cette pièce en regard de l'encoche par l'intermédiaire d'une lame élastique pressée contre le patin par un levier de réglage. Un dispositif de ce genre est par exemple décrit dans le brevet suisse N ° 238 674.Already known loop sensor devices for sewing machine, comprising a frame carrying a rotating bowl provided with a hook near its upper edge and having a housing for receiving a capsule carrying a bobbin, this capsule being provided with a mechanism for adjusting the tension of the bobbin thread, this mechanism comprising a part having a notch for the passage of the bobbin thread, a shoe being applied against the thread on the external surface of this part facing the notch via an elastic blade pressed against the shoe by an adjustment lever. A device of this kind is for example described in Swiss patent N ° 238,674.

Dans le dispositif connu de ce genre, il est nécessaire d'effectuer un réglage initial à l'usine de façon que la plage de réglage obtenue par le levier de réglage corresponde bien à ce qui est désiré. Jusqu'à présent, le mécanisme de réglage faisait partie intégrante de la capsule, de sorte que l'opération de réglage initial était assez compliquée.In the known device of this kind, it is necessary to carry out an initial adjustment at the factory so that the adjustment range obtained by the adjustment lever corresponds well to what is desired. Until now, the adjustment mechanism was an integral part of the capsule, so that the initial adjustment operation was quite complicated.

L'invention a pour but de simplifier le réglage initial en usine. A cet effet, la pièce arquée s'étant sur au moins une portion du pourtour de la canette. le levier de réglage étant pivoté sur un support monté de façon réglable sur la pièce arquée, des moyens permettant la fixation sur la capsule de l'ensemble formé par la pièce arquée, le sabot, la lame élastique, le levier et le support réglable.The invention aims to simplify the initial factory setting. For this purpose, the arcuate part being on at least a portion of the periphery of the can. the adjustment lever being pivoted on a support mounted in an adjustable manner on the arcuate part, means allowing the fixing on the capsule of the assembly formed by the arcuate part, the shoe, the elastic blade, the lever and the adjustable support.

Le dessin annexé représente, - schématiquement et à titre d'exemple, une forme d'exécution du dispositif objet de l'invention.

  • La figure 1 est une vue en pian de cette forme d'exécution.
  • La figure 2 est une coupe selon la ligne Il -II de la figure 1.
  • La figure 3 est une vue en plan partiel de la figure 1, à plus grande échelle, montrant le mécanisme de réglage de la tension du fil de canette.
  • La figure 4 est une vue schématique d'un détail selon la ligne V -V de la figure 3.
The appended drawing represents, schematically and by way of example, an embodiment of the device which is the subject of the invention.
  • Figure 1 is a plan view of this embodiment.
  • Figure 2 is a section along line II -II of Figure 1.
  • Figure 3 is a partial plan view of Figure 1, on a larger scale, showing the mechanism for adjusting the tension of the bobbin thread.
  • FIG. 4 is a schematic view of a detail along the line V -V of FIG. 3.

En référence aux figures 1 et 2, le capteur de boucle comprend un bâti 1 portant un pivot fixe 2 sur lequel est montée tournante une cuvette 3. L'entraînement en rotation de cette cuvette est obtenu par un arbre d'entraînement 4 portant une roue 5 à denture oblique, laquelle engrène avec une autre roue 6 à denture oblique solidaire de la cuvette 3. Cette dernière est retenue sur le pivot 2 au moyen d'une vis 7 et d'une rondelle 8, qui est combinée avec au moins un aimant permanent 9.With reference to FIGS. 1 and 2, the loop sensor comprises a frame 1 carrying a fixed pivot 2 on which a cup 3 is rotatably mounted. The rotation drive of this cup is obtained by a drive shaft 4 carrying a wheel 5 with oblique teeth, which meshes with another wheel 6 with oblique teeth integral with the bowl 3. The latter is retained on the pivot 2 by means of a screw 7 and a washer 8, which is combined with at least one permanent magnet 9.

La partie supérieure de la cuvette 3 comprend un crochet 10 destiné à s'engager dans la boucle du fil d'aiguille de la machine à coudre.The upper part of the bowl 3 comprises a hook 10 intended to engage in the loop of the needle thread of the sewing machine.

La portion annulaire supérieure de la cuvette rotative est constituée par deux anneaux métalliques pians 12 et 13 superposés. Les anneaux 12 et 13 présentent une encoche 14 découpée de façon à s'intégrer au crochet 10 . L'anneau inférieur 13 est découpé pour former le bec 15 du crochet servant à capter le fil supérieur et à l'amener dans l'encoche 14 pour le faire passer autour de la canette.The upper annular portion of the rotary bowl consists of two metal rings 12 and 13 overlapped. The rings 12 and 13 have a notch 14 cut out so as to be integrated into the hook 10. The lower ring 13 is cut to form the beak 15 of the hook used to catch the upper thread and to bring it into the notch 14 to pass it around the bobbin.

Les anneaux 12 et 13 sont rendus solidaires de la cuvette 3, par exemple à l'aide de vis 16, et constituent les surfaces de guidage et de support d'une capsule 17. Cette capsule présente une surface d'appui 18 qui repose sur l'anneau 13. Le guidage latéral de cette capsule est réalisé par la surface du diamètre intérieur de l'anneau 12, qui retient latéralement la surface d'appui 18.The rings 12 and 13 are made integral with the bowl 3, for example using screws 16, and constitute the guide and support surfaces of a capsule 17. This capsule has a bearing surface 18 which rests on the ring 13. The lateral guidance of this capsule is produced by the surface of the internal diameter of the ring 12, which laterally retains the bearing surface 18.

Pour empêcher que la capsule 17 ne soit entraînée en rotation par frottement par la cuvette 3, elle est retenue angulairement par deux doigts d'échappement 19 et 20 formés par l'extrémité de leviers articulés sur des pivots 21 et 22 rendus solidaires du bâti 1. Ces leviers sont soumis à l'action de ressorts 23 et 24 tendant à les maintenir engagés dans des encoches 25 et 26 de la capsule. Ces deux doigts sont désengagés alternativement de la capsule pour permettre le passage de la boucle du fil d'aiguille, qui a été prise par le crochet 14 et qui doit être passée autour de la capsule 17. Le mouvement des doigts 19 et 20 est obtenu par l'appui d'une touche 27, respectivement 28, contre des surfaces de cames 29et 30 qui sont formées sur une paroi extérieure continue 31 qui fait partie de la cuvette et qui s'étend vers le bas à partir des anneaux 12 et 13.To prevent the capsule 17 from being rotated by friction by the bowl 3, it is angularly retained by two escape fingers 19 and 20 formed by the end of levers articulated on pivots 21 and 22 made integral with the frame 1 These levers are subjected to the action of springs 23 and 24 tending to keep them engaged in notches 25 and 26 of the capsule. These two fingers are alternately disengaged from the capsule to allow the passage of the loop of the needle thread, which has been taken by the hook 14 and which must be passed around the capsule 17. The movement of the fingers 19 and 20 is obtained by pressing a key 27, respectively 28, against cam surfaces 29 and 30 which are formed on a continuous outer wall 31 which is part of the bowl and which extends downwards from the rings 12 and 13 .

La capsule 17 contient la canette 32 sur laquelle est bobiné le fil inférieur. Le fil de cette canette est soumis à un freinage prédéterminé pour obtenir une certaine tension du fil pendant la couture. Le mécanisme de réglage de la tension de ce fil est représenté à plus grande échelle aux figures 3 et 4. Ce mécanisme est entièrement porté par une pièce arquée 33 qui s'étend sur une portion du pourtour de la canette 32 et constitue une partie de la paroi du logement dans lequel est placée la canette. Cette pièce arquée présente une encoche 34 pour le passage du fil de canette 35.The capsule 17 contains the bobbin 32 on which the lower thread is wound. The thread of this bobbin is subjected to predetermined braking to obtain a certain tension of the thread during sewing. The mechanism for adjusting the tension of this thread is shown on a larger scale in FIGS. 3 and 4. This mechanism is entirely carried by an arcuate piece 33 which extends over a portion of the periphery of the bobbin 32 and constitutes a part of the wall of the housing in which the bobbin is placed. This arcuate part has a notch 34 for the passage of the bobbin thread 35.

Un patin 36 appuie le fil 35 contre la surface extérieure de la pièce arquée 33 à partir de l'encoche 34, de façon à exercer un freinage sur ce fil lorsqu'on le dévide. A cet effet, le patin 36 est soumis à l'action élastique d'une lame de ressort 37 qui est maintenue appuyée contre le patin grâce à un levier 38 de maintien et de réglage. Ce levier 38 est monté pivotant sur un support 39 sur lequel pivote une came 40 qui agit sur le levier de réglage 38. Le support de réglage 39 et le levier 38 sont tous deux articulés sur une vis à portée 41, dont la partie filetée est vissée dans une patte 42 faisant partie de la pièce arquée 33. Le support 39 est réglable et sa position peut être ajustée à l'aide d'une vis de réglage 43 coopérant avec un alésage fileté prévu dans la pièce 33.A shoe 36 presses the wire 35 against the outer surface of the arcuate part 33 from the notch 34, so as to exert braking on this wire when it is unwound. To this end, the shoe 36 is subjected to the elastic action of a leaf spring 37 which is kept pressed against the shoe by means of a lever 38 for holding and adjusting. This lever 38 is pivotally mounted on a support 39 on which pivots a cam 40 which acts on the adjustment lever 38. The adjustment support 39 and the lever 38 are both articulated on a bearing screw 41, the threaded part of which is screwed into a tab 42 forming part of the arcuate part 33. The support 39 is adjustable and its position can be adjusted using an adjustment screw 43 cooperating with a threaded bore provided in the part 33.

La vis 41 présente une portion filetée assez longue pour traverser un perçage de la capsule 17 et s'engager dans un écrou non représenté permettant de visser sur la capsule 17 l'ensemble formé par la pièce arquée 33, le patin 36, la lame élastique 37, le levier 38 et le support réglable 39. Le réglage de la pression du patin 36sur le fil 35 est obtenu par la modification de la position du levier 38 par rapport à la pièce 33. Cette position du levier 38 est déterminée, d'une part, par la position du support 39 qui est ajusté à l'usine en agissant sur la vis 43 et, d'autre part, par une action sur la came 40, qui peut être effectuée par l'usager, à l'aide d'un tournevis qu'il engage dans une fente 44 de cette came, tout en conservant le réglage initial d'usine.The screw 41 has a threaded portion long enough to pass through a hole in the capsule 17 and engage in a nut, not shown, allowing the assembly formed by the arcuate part 33, the shoe 36, the elastic blade to be screwed onto the capsule 17. 37, the lever 38 and the adjustable support 39. The adjustment of the pressure of the shoe 36 on the wire 35 is obtained by modifying the position of the lever 38 relative to the part 33. This position of the lever 38 is determined, from on the one hand, by the position of the support 39 which is adjusted at the factory by acting on the screw 43 and, on the other hand, by an action on the cam 40, which can be carried out by the user, using a screwdriver which it engages in a slot 44 of this cam, while retaining the initial factory setting.

Comme le montre la figure 4, l'extrémité du patin 36, qui est représentée en trait interrompu, présente deux doigts de guidage 45 et 46 entre lesquels le fil 35 doit passer. Ces doigts sont légèrement recourbés et pénètrent partiellement dans une ouverture 47 de l'extrémité de la pièce arquée 33. Cette extrémité porte encore un doigt 48 définissant une encoche 49 dans laquelle doit passer le fil 35.As shown in Figure 4, the end of the shoe 36, which is shown in broken lines, has two guide fingers 45 and 46 between which the wire 35 must pass. These fingers are slightly curved and partially penetrate into an opening 47 in the end of the arched part 33. This end also carries a finger 48 defining a notch 49 through which the wire 35 must pass.

L'encoche 34 est constituée par une fente s'étendant obliquement jusque sous le patin 36, les positions relatives entre le fond de cette fente et l'encoche 49 étant choisies de façon que la portion de fil 35 passant de fond de la fente à l'encoche 49 passe également entre les doigts 45 et 46 du patin. Ainsi, pour la mise en place du fil de canette, il suffit à l'usager d'insérer la canette dans le logement qui est prévu à cet effet dans la capsule, puis de tirer le fil pour l'engager dans l'encoche 34et de continuer sa traction en le dirigeant vers un coupe-fil 50(figure 1) qui est porté par le bâti du dispositif. Le fil passe alors sous le doigt 48 et s'appuie au fond de l'encoche 49. En exerçant une traction sur le fil, celui-ci vient se placer correctement sous le patin 36, entre les doigts 45 et 46. Le passage du fil sous le doigt 46 peut être facilité grâce à une légère dépression 51 prévue dans le pièce arquée 33 , ceci afin d'obtenir un enfilage du fil inférieur automatiquement sans avoir l'obligation de retenir manuellement la canette. Le coupe-fil est conformé de façon à retenir le fil sortant de la canette et/ou le fil d'aiguille et sa position est telle que la longueur des brins permet, sans autres, le départ de la couture. Il y a lieu de remarquer que le sens de rotation de la cuvette 3 est tel que son crochet s'approche du doigt 48 définissant ladite encoche 49 dans la pièce arquée 33 en lui faisant face, la longueur de ce doigt 48 étant suffisante pour retenir le fil de canette dans l'encoche 49 et éviter ainsi que la boucle du fil d'aiguille fasse sortir le fil de canette du mécanisme de réglage de tension.The notch 34 is constituted by a slot extending obliquely as far as the shoe 36, the relative positions between the bottom of this slot and the notch 49 being chosen so that the portion of wire 35 passing from the bottom of the slot to the notch 49 also passes between the fingers 45 and 46 of the skate. Thus, for the establishment of the bobbin thread, the user need only insert the bobbin into the housing which is provided for this purpose in the capsule, then pull the thread to engage it in the notch 34 and to continue its traction by directing it towards a wire cutter 50 (FIG. 1) which is carried by the frame of the device. The wire then passes under the finger 48 and rests on the bottom of the notch 49. By exerting traction on the wire, the latter comes to be placed correctly under the pad 36, between the fingers 45 and 46. The passage of the thread under the finger 46 can be facilitated by a slight depression 51 provided in the arcuate part 33, this in order to obtain threading of the lower thread automatically without having to manually retain the bobbin. The thread cutter is shaped so as to retain the thread coming out of the bobbin and / or the needle thread and its position is such that the length of the strands allows, without others, the start of the seam. It should be noted that the direction of rotation of the bowl 3 is such that its hook approaches the finger 48 defining said notch 49 in the arched part 33 facing it, the length of this finger 48 being sufficient to retain the bobbin thread in the notch 49 and thus prevent the needle thread loop from pulling the bobbin thread out of the tension adjustment mechanism.

Claims (5)

1. Dispositif capteur de boucle pour machine à coudre, comprenant un bâti portant une cuvette rotative munie d'un crochet près de son bord supérieur et présentant un logement pour recevoir une capsule portant une canette, cette caspule étant munie d'un mécanisme de réglage de la tension du fil de. canette, ce mécanisme comprenant une pièce présentant une encoche pour le passage du fil de canette, un patin étant appliqué contre le fil sur la surface extérieure de cette pièce en regard de l'encoche par l'intermédiaire d'une lame élastique pressée contre le patin par un levier de réglage, caractérisé en ce que la pièce arquée s'étend sur au moins une portion du pourtour de la canette, le levier de réglage étant pivoté sur un support monté de façon réglable sur la pièce arquée, des moyens permettant la fixation sur la capsule de l'ensemble formé par la pièce arquée, le sabot, la lame élastique, le levier et le support réglable.1. A loop sensor device for a sewing machine, comprising a frame carrying a rotating bowl provided with a hook near its upper edge and having a housing for receiving a capsule carrying a bobbin, this caspule being provided with an adjustment mechanism of the thread tension. bobbin, this mechanism comprising a part having a notch for the passage of the bobbin thread, a shoe being applied against the thread on the external surface of this part facing the notch by means of an elastic blade pressed against the pad by an adjustment lever, characterized in that the arcuate part extends over at least a portion of the periphery of the bobbin, the adjustment lever being pivoted on a support mounted in an adjustable manner on the arcuate part, means allowing the fixing on the capsule of the assembly formed by the arched piece, the shoe, the elastic blade, the lever and the adjustable support. 2. Dispositif selon la revendication 1, caractérisé en ce que le support réglable est pivoté sur la pièce arquée, son axe de pivotement étant confondu avec l'axe de pivotement du levier de réglage.2. Device according to claim 1, characterized in that the adjustable support is pivoted on the arcuate part, its pivot axis being coincident with the pivot axis of the adjustment lever. 3. Dispositif selon la revendication 1, caractérisé en ce que le levier de réglage et -le support réglable sont pivotés sur une vis à portée qui est rendue solidaire d'une partie de la pièce arquée et permet la fixation de l'ensemble sur la capsule.3. Device according to claim 1, characterized in that the adjustment lever and the adjustable support are pivoted on a bearing screw which is made integral with a part of the arched part and allows the assembly to be fixed on the capsule. 4. Dispositif selon la revendication 3, caractérisé en ce que l'encoche de la pièce arquée est constituée par une fente s'étendant obliquement jusque sous le patin, l'extrémité de la pièce arquée du côté où le fil quitte cette dernière étant munie d'un doigt définissant une encoche avec le reste de la pièce arquée, cette dernière encoche étant disposée pour forcer le fil de la canette à venir se placer correctement sous le patin lors du placement du fil de la canette, le mouvement pour faire placer le fil sous ce doigt étant obtenu automatiquement lorsqu'on tire le fil en direction d'un coupe-fil dont la position est fixe par rapport au dispositif capteur.4. Device according to claim 3, characterized in that the notch of the arcuate piece is constituted by a slot extending obliquely as far as the shoe, the end of the arcuate part on the side where the wire leaves the latter being provided with a finger defining a notch with the rest of the arcuate part, the latter notch being arranged to force the bobbin thread to come to be placed correctly under the shoe when placing the bobbin thread, the movement to place the thread under this finger being obtained automatically when the wire is pulled towards a wire cutter whose position is fixed relative to the sensor device. 5. Dispositif selon la revendication 4, caractérisé en ce que le sens de rotation de la cuvette est tel que son crochet s'approche du doigt définissant ladite encoche dans la pièce arquée en lui faisant face, la longueur de ce doigt étant suffisante pour retenir le fil de canette dans l'encoche et éviter ainsi que la boucle du fil d'aiguille fasse sortir le fil de canette du mécanisme de réglage de tension.5. Device according to claim 4, characterized in that the direction of rotation of the bowl is such that its hook approaches the finger defining said notch in the arcuate part facing it, the length of this finger being sufficient to retain the bobbin thread in the notch and thus prevent the needle thread loop from pulling the bobbin thread out of the tension adjustment mechanism.
EP86810121A 1985-03-20 1986-03-10 Loop taker with a rotary hook for a sewing machine Withdrawn EP0200675A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1234/85 1985-03-20
CH1234/85A CH665435A5 (en) 1985-03-20 1985-03-20 ROTARY HOOK LOOP SENSOR DEVICE FOR SEWING MACHINE.

Publications (2)

Publication Number Publication Date
EP0200675A2 true EP0200675A2 (en) 1986-11-05
EP0200675A3 EP0200675A3 (en) 1988-12-14

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP86810121A Withdrawn EP0200675A3 (en) 1985-03-20 1986-03-10 Loop taker with a rotary hook for a sewing machine

Country Status (6)

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EP (1) EP0200675A3 (en)
JP (1) JPS61220694A (en)
AU (1) AU5495086A (en)
CH (1) CH665435A5 (en)
ES (1) ES8701871A1 (en)
ZA (1) ZA862027B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1699354A (en) * 1923-03-02 1929-01-15 Charles H Greenwood Sewing machine
CH238674A (en) * 1944-01-27 1945-08-15 Sa Mefina Sewing machine shuttle.
DE952588C (en) * 1953-04-10 1956-11-15 Messerschmitt A G Two-part gripper for sewing machines
US3382826A (en) * 1966-03-24 1968-05-14 Singer Co Sewing machine loop takers
CH589741A5 (en) * 1974-12-19 1977-07-15 Mefina Sa Two component coupling maintained by retractable linkage - esp. sewing machine spool holder and housing, facilitating stitch formation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1699354A (en) * 1923-03-02 1929-01-15 Charles H Greenwood Sewing machine
CH238674A (en) * 1944-01-27 1945-08-15 Sa Mefina Sewing machine shuttle.
DE952588C (en) * 1953-04-10 1956-11-15 Messerschmitt A G Two-part gripper for sewing machines
US3382826A (en) * 1966-03-24 1968-05-14 Singer Co Sewing machine loop takers
CH589741A5 (en) * 1974-12-19 1977-07-15 Mefina Sa Two component coupling maintained by retractable linkage - esp. sewing machine spool holder and housing, facilitating stitch formation

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ZA862027B (en) 1986-11-26
ES553100A0 (en) 1986-12-01
CH665435A5 (en) 1988-05-13
EP0200675A3 (en) 1988-12-14
AU5495086A (en) 1986-09-25
ES8701871A1 (en) 1986-12-01
JPS61220694A (en) 1986-09-30

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