EP0122222B1 - Sewing machine - Google Patents

Sewing machine Download PDF

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Publication number
EP0122222B1
EP0122222B1 EP84810064A EP84810064A EP0122222B1 EP 0122222 B1 EP0122222 B1 EP 0122222B1 EP 84810064 A EP84810064 A EP 84810064A EP 84810064 A EP84810064 A EP 84810064A EP 0122222 B1 EP0122222 B1 EP 0122222B1
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EP
European Patent Office
Prior art keywords
cam
shape
feeler
sewing machine
needle holder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP84810064A
Other languages
German (de)
French (fr)
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EP0122222A1 (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
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Mefina SA
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Filing date
Publication date
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Publication of EP0122222A1 publication Critical patent/EP0122222A1/en
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Publication of EP0122222B1 publication Critical patent/EP0122222B1/en
Expired legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/22—Work-feeding means with means for setting length of stitch
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B19/00—Programme-controlled sewing machines
    • D05B19/02—Sewing machines having electronic memory or microprocessor control unit
    • D05B19/12—Sewing machines having electronic memory or microprocessor control unit characterised by control of operation of machine
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B3/00—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
    • D05B3/02—Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing with mechanisms for needle-bar movement

Definitions

  • the subject of the invention is a sewing machine, comprising lateral control and positioning members of the needle holder bar and of adjusting the amplitude and the direction of movement of the material to be sewn.
  • Swiss Patent No. 277.952 a sewing machine is known, in which the lateral movements of the needle bar and the advancement of the conveyor are controlled by two cams, removably fixed on a drive shaft, in continuous movement, replaceable with other cams and interchangeable with each other.
  • German patent application No. 27 34404 is a machine of the same type in which the lateral position of the needle bar is determined by the unique profile of a cam controlled by a controlled electric motor.
  • the feeler cooperating with this cam profile is periodically raised by another independent cam of this motor to allow the latter to take the desired angular position, without having to overcome the reaction forces of the feeler.
  • the machine according to the invention is characterized in that, on the one hand, it comprises a first controlled motor actuating at least two cam profiles, the first profile allowing, in contact with a first feeler to ensure the lateral positioning of the needle bar, and the second profile cooperating with the first profile against which a third feeler is supported to disengage the needle bar, and on the other hand a second servo motor actuating at least one cam profile determining, in contact with a fourth feeler, the amplitude of the advance or retreat of the material to be sewn.
  • the sewing machine comprises a tubular needle holder bar 1, slidably mounted in a pivoting cradle 2, the longitudinal reciprocating movement of the needle holder bar 1 being provided by a pin 3, coupled to a connecting rod 4, actuated by an eccentric plate 5, mounted on the main drive shaft 12 of the machine.
  • a cam 29 has two complementary profiles B and C for controlling the zigzag seam. To do this, the cam 29 is subjected to an alternating oscillating movement of amplitude determined by a controlled motor 28. In straight stitching, the lateral positioning of a needle fixed to the needle bar 1 is also controlled by the angular position. of the cam 29, determined by the servo motor 28. This servo-control makes it possible to obtain infinite variations in the width of the stitch, respectively in the lateral positioning of the needle holder bar.
  • the control of the transverse movement of the needle holder bar is provided by the profile C of the cam 29, against which a feeler 37 secured to the upper end of the cradle 2 is supported, while the profile B serves as a play follower and adjuster, against which a feeler 39 mounted on a lever arm 38 pivotally mounted on the oscillation axis 6 of the cradle 2 is supported, the feelers 37 and 39 being held in contact with the profiles of cam B, C by an opposing spring 40.
  • a control member 26 for disengaging the needle holder bar 1 is pivotally mounted on a transverse axis 24 inside the needle holder bar 1.
  • a rod 18 has a ramp 22, which, when inserted against the action of a return spring 25, between the internal wall of the needle holder bar 1 and the head 23 of the control member 26, makes it pivot on the axis 24. Therefore, the shutter 17 of the control member 26 pushes the stud 9 out of the opening 11 against the action of the spring 10. It follows that the pin 3 slides on the needle bar 1 , which remains in a high position under the action of a spring, its clamping ring 13 being retained by a stop.
  • the cam 29 comprises a third profile A 1 ' A 2 , A 3 , against which a feeler 30 of a lever 31 is supported, articulated on an axis 21 (fig. 2).
  • the retaining stop of the clamping ring 13 can advantageously be replaced by the support member 32, provided that the upper end of the rod 18 (fig. 7) has a clearance 20, allowing the member support 32 to retain the needle holder bar 1 in the clutch position, when the feeler 30 bears on position A 2 of the 3rd cam profile.
  • the lateral position of the needle bar 1 remains determined by an extension D, E of the cam profiles B and C, when the feeler 30 is in position A 2 or A 3 .
  • cam 29 could still perform other functions such as adjusting the tension of the thread for example.
  • a cam 83 angularly positioned by a servo motor 70 controls the amplitude of the advance and the retraction of the transport claw 47, secured to a claw support 46 by means of a feeler 63, integral with a lever 64 and in contact with the profile 62 of the cam 83, this command being transmitted by the lever 64, articulated to the frame, determining by means of links 65 and 66 the angular position of a connecting rod 61, the connecting rods 66 and 61 being integral with the same axis 67, pivoted in the frame.
  • the angular position of the link 61 determines the direction and the amplitude of the movement of the claw support 46 by means of links 57, 52, the latter being connected by an axis 54 to a joint 55, 56, the common axis 53 of the rods 57, 52 being actuated by an eccentric 50 and a rod 51.
  • a lever 94 articulated to the frame provided with a feeler 95 in contact with a profile 97, parallel to a profile 62, ensures contact with feeler 63 against the profile 62, under the effect of 'a return spring 96 connecting the lever 64 to the lever 94, thus forming a parallelogram, constituting a backlash device with substantially constant torque.
  • a second profile 93 of the cam 83 controls by a lever 85 the angular position of a part 87, pivoted in a bearing 92 of the frame and orientates a plane 88, integral with the part 87 , angularly with respect to the traditional sewing direction of the claw 47, so as to produce a lateral displacement of the claw support 46, against the action of a return spring, due to the oscillation produced by the eccentric 89 of a fork 69, pivoting on an axis 68, the fork 69 comprising balls 86 disposed between the claw support 46 and the plane 88.
  • the lateral displacement of the claw support 46 takes place perpendicular to the traditional sewing direction in one or the other direction (left or right, see FIG. 8).
  • the plane 88 could oscillate with the part 87 in the bearing 92 of the frame by means of an eccentric, the amplitude and the direction of the lateral movement of the claw support 46 being determined by the position of the balls 86 along the plan 88.
  • the claw support 46 is supported on a ball joint support rod 45, in order to allow both longitudinal and transverse displacement or simultaneous transverse and longitudinal displacement of claw support 46.
  • an eccentric cam 41 secured to the lower shaft 42 of the machine actuates a lever 43 pivoted on an axis 44, secured to the lower frame, ensuring the raising of a claw support 46 by the intermediate of the ball-and-socket support rod 45.
  • the lever 43 By moving the lever 43 to the left of FIG. 8, on the axis 44 by means of the manual pusher 49, the lever 43 comes to rest on a cylindrical element 48. This results in a interruption of the transport of the fabric by the claw 47, because there is no longer any rise in the claw, the latter remaining below the seam plane, following the erasure of the ball-and-socket support rod 45 (see Figure 13).
  • F 1 corresponds to the adjustment of the amplitude of the stitch length during reverse transport from 0 to maximum M i , the profile 93 of the cam 83 maintaining the plane 88 parallel to the traditional sewing direction.
  • F 2 corresponds to the forward adjustment of the length of stitch 0 to the maximum M 2 , the profile 93 of the cam 83 keeping the plane 88 parallel to the traditional sewing direction.
  • F 3 corresponds to a bias movement of a forward seam of variable stitch length combined with a lateral movement to the left with the intervention of the lever 85, actuated by the profile 93 of the cam 83.
  • F 4 corresponds to a fine adjustment area before the rear, the slope of the profile 62 of the cam 83 being reduced to allow more precise adjustment of small stitch lengths, for the same angle of oscillation of the cam 83 as in F 1 and F 2 , by example for sewing bumblebees, buttonholes, etc., the profile 93 of cam 83 maintaining the plane 88 parallel to the traditional sewing direction.
  • F 6 corresponds to the adjustment of the amplitude of the lateral transport from a maximum M 3 to the right to a maximum M 4 to the left via a position corresponding to zero transport.
  • the synchronization of the various control members is ensured between the main drive shaft 12 and the lower shaft 42 by the belt 90 and under the control of a servo disk 91, mounted on one of these shafts.
  • the slave motors can be managed by one or more microprocessors.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Sewing Machines And Sewing (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)

Description

L'invention a pour objet une machine à coudre, comprenant des organes de commande et de positionnement latéraux de la barre porte-aiguille et du réglage de l'amplitude et du sens du déplacement du matériau à coudre.The subject of the invention is a sewing machine, comprising lateral control and positioning members of the needle holder bar and of adjusting the amplitude and the direction of movement of the material to be sewn.

Par le brevet suisse N° 277.952, on connaît une machine à coudre, dans laquelle les déplacements latéraux de la barre porte-aiguille et l'avancement du transporteur sont commandés par deux cames, fixées de manière amovible sur un arbre d'entraînement, en mouvement continu, de façon remplaçable par d'autres cames et permutables entre elles.By Swiss Patent No. 277.952, a sewing machine is known, in which the lateral movements of the needle bar and the advancement of the conveyor are controlled by two cams, removably fixed on a drive shaft, in continuous movement, replaceable with other cams and interchangeable with each other.

On connaît aussi, par la demande de brevet allemand N° 27 34404, une machine du même type dans laquelle la position latérale de la barre porte-aiguille est déterminée par le profil unique d'une came commandée par un moteur électrique asservi. Le tâteur coopérant avec ce profil de came est soulevé périodiquement par une autre came indépendante de ce moteur pour permettre à ce dernier de prendre la position angulaire désirée, sans avoir à vaincre les forces de réaction du tâteur.Also known, from German patent application No. 27 34404, is a machine of the same type in which the lateral position of the needle bar is determined by the unique profile of a cam controlled by a controlled electric motor. The feeler cooperating with this cam profile is periodically raised by another independent cam of this motor to allow the latter to take the desired angular position, without having to overcome the reaction forces of the feeler.

Afin d'automatiser, de simplifier et d'augmenter les possibilités de couture, la machine selon l'invention est caractérisée en ce que d'une part elle comprend un premier moteur asservi actionnant au moins deux profils de came, le premier profil permettant, au contact d'un premier tâteur d'assurer le positionnement latéral de la barre porte-aiguille, et le second profil coopérant avec le premier profil contre lequel un troisième tâteur prend appui pour assurer le débrayage de la barre porte-aiguille, et d'autre part un second moteur asservi actionnant au moins un profil de came déterminant, au contact d'un quatrième tâteur, l'amplitude de l'avance ou du recul du matériau à coudre.In order to automate, simplify and increase the sewing possibilities, the machine according to the invention is characterized in that, on the one hand, it comprises a first controlled motor actuating at least two cam profiles, the first profile allowing, in contact with a first feeler to ensure the lateral positioning of the needle bar, and the second profile cooperating with the first profile against which a third feeler is supported to disengage the needle bar, and on the other hand a second servo motor actuating at least one cam profile determining, in contact with a fourth feeler, the amplitude of the advance or retreat of the material to be sewn.

Les dessins annexés représentent schématiquement et à titre d'exemple une forme d'exécution de la machine selon l'invention.

  • La figure 1 en est une vue partielle, représentant le bras supérieur de la machine en élévation de face avec arrachements.
  • La figure 2 en est une vue partielle, représentant la tête de la machine en coupe selon II-II de la figure 1.
  • La figure 3 est une vue à plus grande échelle, partiellement en coupe axiale de la barre porte-aiguille, représentée à la figure 2.
  • La figure 4 est une vue similaire à la figure 3, représentant la barre porte-aiguille en position débrayée.
  • La figure 5 est une vue en perspective de la came de commande, représentée aux figures 1 et 2.
  • La figure 6 est un schéma des fonctions de la came, représentée à la figure 5.
  • La figure 7 représente une variante de l'organe de débrayage de la barre porte-aiguille.
  • La figure 8 est une vue partielle de dessus avec arrachement du bâti inférieur de la machine.
  • La figure 9 en est une vue en coupe transversale selon IX-IX de la figure 8.
  • La figure 10 est une vue en coupe transversale selon X-X de la figure 8.
  • La figure 11 en est une vue en coupe transversale selon XI-XI de la figure 8.
  • La figure 12 en est une vue en coupe transversale selon XII-XII de la figure 8.
  • La figure 13 est une vue éclatée, vue de droite à gauche, de la figure 12.
  • La figure 14 en est une vue en coupe selon XIV-XIV de la figure 8.
  • La figure 15 est une vue en coupe selon XV-XV de la figure 14.
  • La figure 16 est un schéma des fonctions de la came de commande, représentée aux figures 8 et 9.
The accompanying drawings show schematically and by way of example an embodiment of the machine according to the invention.
  • Figure 1 is a partial view, showing the upper arm of the machine in front elevation with cutaway.
  • FIG. 2 is a partial view thereof, representing the head of the machine in section along II-II of FIG. 1.
  • FIG. 3 is a view on a larger scale, partially in axial section of the needle holder bar, represented in FIG. 2.
  • Figure 4 is a view similar to Figure 3, showing the needle holder bar in the disengaged position.
  • FIG. 5 is a perspective view of the control cam, shown in FIGS. 1 and 2.
  • FIG. 6 is a diagram of the functions of the cam, represented in FIG. 5.
  • FIG. 7 represents a variant of the disengaging member of the needle holder bar.
  • Figure 8 is a partial top view with cutaway of the lower frame of the machine.
  • FIG. 9 is a cross-sectional view along line IX-IX of FIG. 8.
  • FIG. 10 is a cross-sectional view along XX of FIG. 8.
  • FIG. 11 is a cross-sectional view thereof along XI-XI of FIG. 8.
  • Figure 12 is a cross-sectional view along XII-XII of Figure 8.
  • FIG. 13 is an exploded view, seen from right to left, of FIG. 12.
  • Figure 14 is a sectional view along XIV-XIV of Figure 8.
  • Figure 15 is a sectional view along XV-XV of Figure 14.
  • FIG. 16 is a diagram of the functions of the control cam, shown in FIGS. 8 and 9.

Comme représenté aux figures 1 et 2 du dessin, la machine à coudre comprend une barre porte-aiguille tubulaire 1, montée de façon coulissante dans un berceau pivotant 2, le mouvement de va-et-vient longitudinal de la barre porte-aiguille 1 étant assuré par un tourillon 3, accouplé à une bielle 4, actionnée par un plateau excentrique 5, monté sur l'arbre d'entraînement principal 12 de la machine.As shown in Figures 1 and 2 of the drawing, the sewing machine comprises a tubular needle holder bar 1, slidably mounted in a pivoting cradle 2, the longitudinal reciprocating movement of the needle holder bar 1 being provided by a pin 3, coupled to a connecting rod 4, actuated by an eccentric plate 5, mounted on the main drive shaft 12 of the machine.

Comme représenté aux figures 5 et 6, une came 29 comporte deux profils complémentaires B et C de commande de la couture zig-zag. Pour ce faire, la came 29 est soumise à un mouvement oscillant alternatif d'amplitude déterminée par un moteur asservi 28. En couture droite, le positionnement latéral d'une aiguille fixée à la barre porte-aiguiile 1 est également commandé par la position angulaire de la came 29, déterminée par le moteur asservi 28. Cet asservissement permet d'obtenir des variations infinies de la largeur du point, respectivement du positionnement latéral de la barre porte-aiguille.As shown in FIGS. 5 and 6, a cam 29 has two complementary profiles B and C for controlling the zigzag seam. To do this, the cam 29 is subjected to an alternating oscillating movement of amplitude determined by a controlled motor 28. In straight stitching, the lateral positioning of a needle fixed to the needle bar 1 is also controlled by the angular position. of the cam 29, determined by the servo motor 28. This servo-control makes it possible to obtain infinite variations in the width of the stitch, respectively in the lateral positioning of the needle holder bar.

Comme représenté aux figures 2 et 6, la commande du mouvement transversal de la barre porte-aiguille est assurée par le profil C de la came 29, contre lequel un tâteur 37 solidaire de l'extrémité supérieure du berceau 2 prend appui, tandis que le profil B sert de suiveur et rattrapeur de jeu, contre lequel un tâteur 39 monté sur un bras de levier 38 monté pivotant sur l'axe d'oscillation 6 du berceau 2 prend appui, les tâteurs 37 et 39 étant maintenus au contact des profils de came B, C par un ressort antagoniste 40.As shown in Figures 2 and 6, the control of the transverse movement of the needle holder bar is provided by the profile C of the cam 29, against which a feeler 37 secured to the upper end of the cradle 2 is supported, while the profile B serves as a play follower and adjuster, against which a feeler 39 mounted on a lever arm 38 pivotally mounted on the oscillation axis 6 of the cradle 2 is supported, the feelers 37 and 39 being held in contact with the profiles of cam B, C by an opposing spring 40.

Comme représenté aux figures 3 et 4, un organe de commande 26 du débrayage de la barre porte-aiguille 1 est monté pivotant sur un axe transversal 24 à l'intérieur de la barre porte-aiguille 1. Une tige 18 présente une rampe 22, qui, lorsqu'on l'insère contre l'action d'un ressort de rappel 25, entre la paroi interne de la barre porte-aiguille 1 et la tête 23 de l'organe de commande 26, le fait pivoter sur l'axe 24. De ce fait, l'obturateur 17 de l'organe de commande 26 repousse le téton 9 hors de l'ouverture 11 contre l'action du ressort 10. Il en résulte que le tourillon 3 coulisse sur la barre porte-aiguille 1, qui demeure en position haute sous l'action d'un ressort, son anneau de serrage 13 étant retenu par une butée.As shown in FIGS. 3 and 4, a control member 26 for disengaging the needle holder bar 1 is pivotally mounted on a transverse axis 24 inside the needle holder bar 1. A rod 18 has a ramp 22, which, when inserted against the action of a return spring 25, between the internal wall of the needle holder bar 1 and the head 23 of the control member 26, makes it pivot on the axis 24. Therefore, the shutter 17 of the control member 26 pushes the stud 9 out of the opening 11 against the action of the spring 10. It follows that the pin 3 slides on the needle bar 1 , which remains in a high position under the action of a spring, its clamping ring 13 being retained by a stop.

Comme représenté aux figures 5 et 6, la came 29 comprend un 3ème profil A1' A2, A3, contre lequel prend appui un tâteur 30 d'un levier 31, articulé sur un axe 21 (fig. 2).As shown in FIGS. 5 and 6, the cam 29 comprises a third profile A 1 ' A 2 , A 3 , against which a feeler 30 of a lever 31 is supported, articulated on an axis 21 (fig. 2).

Lorsque le moteur asservi 28 entraîne la came 29, représentée à la figure 2 dans le sens des aiguilles d'une montre, le tâteur 30 prenant appui sur la rampe en A1 passera en A3 et le levier 31 amènera un organe d'appui 32 en position de debrayage de la barre porte-aiguille 1, du fait qu'il se trouve alors en regard de l'extrémité libre de la tige de débrayage 18, qu'il actionne lors de la remontée de la barre porte-aiguille 1.When the servo motor 28 drives the cam 29, shown in FIG. 2 clockwise, the feeler 30 resting on the ramp at A 1 will change to A 3 and the lever 31 will bring a support member 32 in the disengaging position of the needle holder bar 1, owing to the fact that it is then opposite the free end of the declutching rod 18, which it actuates during the raising of the needle holder bar 1 .

La butée de retenue de l'anneau de serrage 13 peut être avantageusement remplacée par l'organe d'appui 32, pour autant que l'extrémité supérieure de la tige 18 (fig. 7) présente un dégagement 20, permettant à l'organe d'appui 32 de retenir la barre porte-aiguille 1 en position d'embrayage, lorsque le tâteur 30 prend appui sur la position A2 du 3ème profil de came.The retaining stop of the clamping ring 13 can advantageously be replaced by the support member 32, provided that the upper end of the rod 18 (fig. 7) has a clearance 20, allowing the member support 32 to retain the needle holder bar 1 in the clutch position, when the feeler 30 bears on position A 2 of the 3rd cam profile.

La position latérale de la barre porte-aiguille 1 demeure déterminée par un prolongement D, E des profils de came B et C, lorsque le tâteur 30 se trouve en position A2 ou A3.The lateral position of the needle bar 1 remains determined by an extension D, E of the cam profiles B and C, when the feeler 30 is in position A 2 or A 3 .

Moyennant d'autres profils la came 29 pourrait encore assurer d'autres fonctions telles que le réglage de la tension du fil par exemple.By means of other profiles, the cam 29 could still perform other functions such as adjusting the tension of the thread for example.

Comme representé aux figures 8 à 12, une came 83 positionnée angulairement par un moteur asservi 70 commande l'amplitude de l'avance et du recul de la griffe de transport 47, solidaire d'un support de griffe 46 par l'intermédiaire d'un tâteur 63, solidaire d'un levier 64 et au contact du profil 62 de la came 83, cette commande étant transmise par le levier 64, articulé au bâti, déterminant par l'intermédiaire de biellettes 65 et 66 la position angulaire d'une biellette 61, les biellettes 66 et 61 étant solidaires d'un même axe 67, pivoté dans le bâti. La position angulaire de la biellette 61 détermine le sens et l'amplitude du déplacement du support de griffe 46 par l'intermediaire de biellettes 57, 52, cette dernière étant reliée par un axe 54 à une articulation 55, 56, l'axe commun 53 des biellettes 57, 52 étant actionne par un excentrique 50 et une bielle 51.As shown in FIGS. 8 to 12, a cam 83 angularly positioned by a servo motor 70 controls the amplitude of the advance and the retraction of the transport claw 47, secured to a claw support 46 by means of a feeler 63, integral with a lever 64 and in contact with the profile 62 of the cam 83, this command being transmitted by the lever 64, articulated to the frame, determining by means of links 65 and 66 the angular position of a connecting rod 61, the connecting rods 66 and 61 being integral with the same axis 67, pivoted in the frame. The angular position of the link 61 determines the direction and the amplitude of the movement of the claw support 46 by means of links 57, 52, the latter being connected by an axis 54 to a joint 55, 56, the common axis 53 of the rods 57, 52 being actuated by an eccentric 50 and a rod 51.

Comme représenté à la figure 9, un levier 94 articulé au bâti, muni d'un tâteur 95 au contact d'un profil 97, parallèle à un profil 62, assure le contact du tâteur 63 contre le profil 62, sous l'effet d'un ressort de rappel 96 reliant le levier 64 au levier 94, formant ainsi un parallélogramme, constituant un dispositif de rattrapage de jeu à couple sensiblement constant.As shown in FIG. 9, a lever 94 articulated to the frame, provided with a feeler 95 in contact with a profile 97, parallel to a profile 62, ensures contact with feeler 63 against the profile 62, under the effect of 'a return spring 96 connecting the lever 64 to the lever 94, thus forming a parallelogram, constituting a backlash device with substantially constant torque.

Comme représenté aux figures 8, 14 et 15, un second profil 93 de la came 83 commande par un levier 85 la position angulaire d'une pièce 87, pivotée dans un palier 92 du bâti et oriente un plan 88, solidaire de la pièce 87, angulairement par rapport à la direction traditionnelle de couture de la griffe 47, de façon à produire un déplacement latéral du support de griffe 46, contre l'action d'un ressort de rappel, du fait de l'oscillation produite par l'excentrique 89 d'une fourche 69, pivotant sur un axe 68, la fourche 69 comprenant des billes 86 disposées entre le support de griffe 46 et le plan 88.As shown in FIGS. 8, 14 and 15, a second profile 93 of the cam 83 controls by a lever 85 the angular position of a part 87, pivoted in a bearing 92 of the frame and orientates a plane 88, integral with the part 87 , angularly with respect to the traditional sewing direction of the claw 47, so as to produce a lateral displacement of the claw support 46, against the action of a return spring, due to the oscillation produced by the eccentric 89 of a fork 69, pivoting on an axis 68, the fork 69 comprising balls 86 disposed between the claw support 46 and the plane 88.

Selon l'orientation du plan 88, le déplacement latéral du support de griffe 46 s'effectue perpendiculairement à la direction de couture traditionnelle dans l'un ou l'autre sens (gauche ou droite, voir figure 8).According to the orientation of the plane 88, the lateral displacement of the claw support 46 takes place perpendicular to the traditional sewing direction in one or the other direction (left or right, see FIG. 8).

Alternativement le plan 88 pourrait osciller avec la pièce 87 dans le palier 92 du bâti par l'intermédiaire d'un excentrique, l'amplitude et le sens du déplacement latéral du support de griffe 46 étant déterminés par la position des billes 86 le long du plan 88.Alternatively the plane 88 could oscillate with the part 87 in the bearing 92 of the frame by means of an eccentric, the amplitude and the direction of the lateral movement of the claw support 46 being determined by the position of the balls 86 along the plan 88.

Comme représenté aux figures 12 et 13, le support de griffe 46 prend appui sur une bielle de support à rotules 45, afin de permettre aussi bien le déplacement longitudinal que transversal ou le déplacement transversal et longitudinal simultané du support de griffe 46.As shown in FIGS. 12 and 13, the claw support 46 is supported on a ball joint support rod 45, in order to allow both longitudinal and transverse displacement or simultaneous transverse and longitudinal displacement of claw support 46.

Comme représenté aux figures 8 et 12, une came excentrée 41 solidaire de l'arbre inférieur 42 de la machine actionne un levier 43 pivoté sur un axe 44, solidaire du bâti inférieur, assurant la remontée d'un support de griffe 46 par l'intermédiaire de la bielle de support à rotules 45. En déplaçant le levier 43 vers la gauche de la figure 8, sur l'axe 44 au moyen du poussoir manuel 49, le levier 43 vient reposer sur un élément cylindrique 48. Il en résulte une interruption du transport du tissu par la griffe 47, du fait qu'il n'y a plus de remontée de la griffe, celle-ci restant en-dessous du plan de couture, suite à l'effacement de la bielle de support à rotules 45 (voir figure 13).As shown in Figures 8 and 12, an eccentric cam 41 secured to the lower shaft 42 of the machine actuates a lever 43 pivoted on an axis 44, secured to the lower frame, ensuring the raising of a claw support 46 by the intermediate of the ball-and-socket support rod 45. By moving the lever 43 to the left of FIG. 8, on the axis 44 by means of the manual pusher 49, the lever 43 comes to rest on a cylindrical element 48. This results in a interruption of the transport of the fabric by the claw 47, because there is no longer any rise in the claw, the latter remaining below the seam plane, following the erasure of the ball-and-socket support rod 45 (see Figure 13).

Le déplacement du levier 43 pour la mise en ou hors fonction de la griffe de transport 47 pourrait être assuré par un autre profil de la came 83.The displacement of the lever 43 for switching on or off the transport claw 47 could be ensured by another profile of the cam 83.

On a représenté schématiquement quelques fonctions qui peuvent être assurées par les profils 62 et 93 de la came 83, de gauche à droite de la figure 16, réalisables par la combinaison des deux directions de transport du tissu, l'une par rapport à l'autre.A few diagrammatic functions have been shown which can be provided by the profiles 62 and 93 of the cam 83, from left to right in FIG. 16, which can be achieved by the combination of the two directions of transport of the fabric, one relative to the other.

F1 correspond au réglage de l'amplitude de la longueur du point lors du transport en marche arrière de 0 au maximum Mi, le profil 93 de la came 83 maintenant le plan 88 parallèle à la direction de couture traditionnelle.F 1 corresponds to the adjustment of the amplitude of the stitch length during reverse transport from 0 to maximum M i , the profile 93 of the cam 83 maintaining the plane 88 parallel to the traditional sewing direction.

F2 correspond au réglage en marche avant de la longueur du point 0 au maximum M2, le profil 93 de la came 83 maintenant le plan 88 parallèle à la direction de couture traditionnelle.F 2 corresponds to the forward adjustment of the length of stitch 0 to the maximum M 2 , the profile 93 of the cam 83 keeping the plane 88 parallel to the traditional sewing direction.

F3 correspond à un déplacement en biais d'une couture en marche avant de longueur de point variable combinée à un déplacement latéral a gauche avec intervention du levier 85, actionné par le profil 93 de la came 83.F 3 corresponds to a bias movement of a forward seam of variable stitch length combined with a lateral movement to the left with the intervention of the lever 85, actuated by the profile 93 of the cam 83.

F4 correspond à une zone de réglage fin avant arrière, la pente du profil 62 de la came 83 étant réduite pour permettre un réglage plus précis de petites longueurs de point, pour un même angle d'oscillation de la came 83 qu'en F1 et F2, par exemple pour la couture de bourdons, boutonnieres, etc., le profil 93 de came 83 maintenant le plan 88 parallèle à la direction de couture traditionnelle.F 4 corresponds to a fine adjustment area before the rear, the slope of the profile 62 of the cam 83 being reduced to allow more precise adjustment of small stitch lengths, for the same angle of oscillation of the cam 83 as in F 1 and F 2 , by example for sewing bumblebees, buttonholes, etc., the profile 93 of cam 83 maintaining the plane 88 parallel to the traditional sewing direction.

F5 correspond à une combinaison de transport avant arrière et gauche droite, déterminée par le prolil 62 de la came 83, en coopération avec le levier 85, au contact du profil 93 de came 83, permettant ainsi les combinaisons suivantes:

  • a: transport arrière + transport latéral à droite
  • b: pas de transport
  • c: transport avant + transport latéral à gauche
  • d: transport avant uniquement
  • e: transport avant + transport latéral à droite
  • f: transport latéral à droite uniquement
  • g: transport arrière uniquement
  • h: transport arrière + transport latéral à gauche
    • i: transport latéral à gauche uniquement
    • Il en résulte que selon la position angulaire de la came 83, il est possible de réaliser des coutures ponctuelles linéaires et multidirectionnelles.
F 5 corresponds to a combination of front, rear and left right transport, determined by the profile 62 of the cam 83, in cooperation with the lever 85, in contact with the profile 93 of the cam 83, thus allowing the following combinations:
  • a: rear transport + lateral transport on the right
  • b: no transport
  • c: front transport + lateral transport on the left
  • d: front transport only
  • e: front transport + lateral transport on the right
  • f: lateral transport on the right only
  • g: rear transport only
  • h: rear transport + lateral transport on the left
    • i: left side transport only
    • As a result, depending on the angular position of the cam 83, it is possible to produce linear and multidirectional point seams.

F6 correspond au réglage de l'amplitude du transport latéral d'un maximum M3 vers la droite à un maximum M4 vers la gauche en passant par une position correspondant à un transport nul.F 6 corresponds to the adjustment of the amplitude of the lateral transport from a maximum M 3 to the right to a maximum M 4 to the left via a position corresponding to zero transport.

La synchronisation des divers organes de commande est assurée entre l'arbre d'entraînement principal 12 et l'arbre inférieur 42 par la courroie 90 et sous contrôle d'un disque d'asservissement 91, monté sur l'un de ces arbres. Les moteurs asservis peuvent être gérés par un ou plusieurs microprocesseurs.The synchronization of the various control members is ensured between the main drive shaft 12 and the lower shaft 42 by the belt 90 and under the control of a servo disk 91, mounted on one of these shafts. The slave motors can be managed by one or more microprocessors.

Claims (6)

1. Sewing machine comprising two controlled electrical motors (28, 70) driving by way of cams (29, 83), respectively controlling parts for the lateral positioning of the needle holder bar and controlling parts for the adjustment of the amplitude and of the direction of the movement of the material to be sewn, characterized in that the first controlled motor (28) drives at least two cam shapes (C and A1, A2, A3), the first shape (C) making it possible, by contact with a first feeler (37), to assure the lateral positioning of the needle holder bar (1), and the second shape (A1, A2, A3) working with a second feeler (30) to assure the disengaging of the needle holder bar (1), when the latter is in a well-determined position, controlled by the first shape.
2. Sewing machine according to Claim 1, characterized in that at least an additional shape driven by one of the contolled motors (28, 70) assures at least another function of the sewing machine.
3. Sewing machine according to claim 1, characterized in that a third shape (B) rigidly connected with and parallel to the first shape (C), and by contact with which a second feeler (38) makes it possible to assure the contact of the first feeler (37) on the shape (C).
4. Sewing machine according to claim 1, characterized in that the first feeler (37) is rigidly connected with the swivelling cradle (2) in which the needle holder bar (1) is engaged.
5. Sewing machine according to claim 1, according to which the second controlled motor (70) drives a controlling cam (83) for a feed dog (47) of the material to sewn, characterized in that the said cam (83) comprises two cam shapes (62, 97) working with two feelers (63 and 95) which are rigidly connected with two levers (64 and 94), said two levers (64 and 94) being connected to one another by a return spring (96) so that one feeler (95) serves to follow and take up play.
6. Sewing machine according to claims 1 and 2, characterized in that the second controlled motor (70) drives simultaneously at least a second cam shape (93) that controls, by contact with a lever (85), the lateral movement of the material to be sewn, the lever (85) by contact with a second shape (93) controlling the angular position of a part (87) that pivots in a bearing (92) of the frame, so as anglularly to orient a plane (88) rigidly connected with the part (87) in relation to the standard sewing direction of the feed dog (47), an eccentric (89) connected to a shaft (42) causing oscillation of a fork (69) on a shaft (68) comprising at least a support element (86) placed between the feed dog support (46) and the plane (88) against the action of a return spring, the amplitude and the direction of the lateral movement of the feed dog support (46) being modified as a function of the orientation of the plane (88).
EP84810064A 1983-02-10 1984-02-06 Sewing machine Expired EP0122222B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH737/83A CH652425A5 (en) 1983-02-10 1983-02-10 SEWING MACHINE.
CH737/83 1983-02-10

Publications (2)

Publication Number Publication Date
EP0122222A1 EP0122222A1 (en) 1984-10-17
EP0122222B1 true EP0122222B1 (en) 1987-11-04

Family

ID=4194032

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Application Number Title Priority Date Filing Date
EP84810064A Expired EP0122222B1 (en) 1983-02-10 1984-02-06 Sewing machine

Country Status (10)

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US (1) US4619214A (en)
EP (1) EP0122222B1 (en)
JP (1) JPS60500702A (en)
AU (1) AU565759B2 (en)
CA (1) CA1278221C (en)
CH (1) CH652425A5 (en)
DE (1) DE3467195D1 (en)
ES (1) ES529602A0 (en)
WO (1) WO1984003110A1 (en)
ZA (1) ZA84960B (en)

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DE8525308U1 (en) * 1985-09-05 1987-09-03 Dorina Naehmaschinen Gmbh, 7500 Karlsruhe, De
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US5094180A (en) * 1990-12-26 1992-03-10 C & W Sewing Machine Attachment Co., Inc. Apparatus for dynamically changing stitch length in a double lock stitch sewing machine
JP3723970B2 (en) * 1999-01-18 2005-12-07 ブラザー工業株式会社 sewing machine
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CN107326555B (en) * 2017-08-07 2020-01-31 杰克缝纫机股份有限公司 kinds of sewing machine

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Also Published As

Publication number Publication date
ES8502495A1 (en) 1985-01-01
ZA84960B (en) 1985-04-24
US4619214A (en) 1986-10-28
DE3467195D1 (en) 1987-12-10
AU2432684A (en) 1984-08-30
CA1278221C (en) 1990-12-27
ES529602A0 (en) 1985-01-01
JPS60500702A (en) 1985-05-16
WO1984003110A1 (en) 1984-08-16
CH652425A5 (en) 1985-11-15
EP0122222A1 (en) 1984-10-17
AU565759B2 (en) 1987-09-24

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