EP0805228B1 - Machine à coudre de précision pour le montage d'une bordure tubulaire au bord d'un tricot, un tissu ou analogue - Google Patents

Machine à coudre de précision pour le montage d'une bordure tubulaire au bord d'un tricot, un tissu ou analogue Download PDF

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Publication number
EP0805228B1
EP0805228B1 EP19960830254 EP96830254A EP0805228B1 EP 0805228 B1 EP0805228 B1 EP 0805228B1 EP 19960830254 EP19960830254 EP 19960830254 EP 96830254 A EP96830254 A EP 96830254A EP 0805228 B1 EP0805228 B1 EP 0805228B1
Authority
EP
European Patent Office
Prior art keywords
welt
tubular
tubular welt
machine
support plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19960830254
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German (de)
English (en)
Other versions
EP0805228A1 (fr
Inventor
Mario Valle
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.)
Conti Complett SpA
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Conti Complett SpA
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Filing date
Publication date
Application filed by Conti Complett SpA filed Critical Conti Complett SpA
Priority to DE1996617397 priority Critical patent/DE69617397T2/de
Priority to ES96830254T priority patent/ES2164860T3/es
Priority to EP19960830254 priority patent/EP0805228B1/fr
Publication of EP0805228A1 publication Critical patent/EP0805228A1/fr
Application granted granted Critical
Publication of EP0805228B1 publication Critical patent/EP0805228B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B35/00—Work-feeding or -handling elements not otherwise provided for
    • D05B35/06—Work-feeding or -handling elements not otherwise provided for for attaching bands, ribbons, strips, or tapes or for binding
    • D05B35/062—Work-feeding or -handling elements not otherwise provided for for attaching bands, ribbons, strips, or tapes or for binding with hem-turning

Definitions

  • the present invention relates to a precision-stitch sewing machine for applying a tubular welt along a predetermined sewing line to an edge of a knitted or woven fabric or the like, according to the preamble of Claim 1.
  • edges of a garment are generally finished in a so-called edging operation in which a knitted, woven or other welt is applied to the edge that is to be finished.
  • the edging operation can be performed on linking machines, which give a high-quality finish to the edge.
  • these machines not only require specialist workers but also have the disadvantage that linking each welt takes a large amount of time. As a result it is uneconomical to use them except for higher-value garments.
  • the edging operation can also be carried out on precision-stitch sewing machines which pass a strip welt through a folding unit that folds the strip around the edge before it is sewn in place. This allows the strip welt to be applied to the edge quickly and cheaply as a simulation of the linked version.
  • tubular type of welt rather than the strip type, as a tubular welt folded around the edge that is to be finished forms a firmer structure less likely to shift out of the sewing line than the kind of structure obtainable by folding a single strip welt, in which the edges are essentially independent of each other.
  • the use of a tubular welt consequently means that the latter can be positioned relative to the sewing line and guided through the sewing area with greater precision.
  • tubular welts have not become widespread because the precision-stitch sewing machines currently used are unable to fold tubular welts satisfactorily around the fabric edge, and it would be unreasonable to consider applying them manually on conventional sewing machines in the context of industrial-scale production.
  • Document US 3,811,391 discloses a sewing machine according to the preamble of claim 1, comprising a sewing guide apparatus particularly adapted for guiding the edge of a first fabric and the closed tubular end of a second fabric to the sewing needle in a manner such that the first fabric edge is overlapped on both sides thereof by double layers of the folded tubular end of the second fabric.
  • the sewing guide apparatus comprises a first guide member having enlarged tapered head portion and a pair of rearwardly extending prongs defining an elongated opening therebetween.
  • the above mentioned sewing machine has the drawback that different sewing guide apparatus have to be used if tubular welt of different diameter are to be folded.
  • the problem upon which the present invention is based is that of devising a machine for carrying out the edging operation whose structural and functional characteristics are such as to satisfy the above need and at the same time to overcome all the problems mentioned with reference to the prior art.
  • Said parting means advantageously include a fork component, over which the tubular welt is fitted and advanced, having two rods that diverge in said direction, that is approximately perpendicular to the support plate, in the direction of advance of the tubular welt.
  • 1 is a general reference for a precision-stitch sewing machine in accordance with the invention for applying a tubular welt 2 to an edge 3, which may for example be the waste band of a sweater.
  • the tubular welt 2 preferably includes an elasticized insert 2a extending axially along the full length of the welt and a border 2b positioned diametrically opposite the elasticized insert 2a.
  • the machine 1 includes a horizontal work surface 5 supported by a frame of the machine 1.
  • the work surface 5 is fitted with: a sewing unit 6, a feed unit 7 for feeding the edge 3 to which the welt is to be applied, entrainment means 8 for the tubular welt 2 and a folding unit 9 for folding the tubular welt 2 around the edge 3.
  • the sewing unit 6 includes a vertical column from which extends an overhanging sewing head 10.
  • a bar 11 projects from the free end of the sewing head 10 towards the work surface 5 in a vertical direction Z-Z.
  • the bar 11 is made to reciprocate in the vertical direction Z-Z by an electric motor with which the machine 1 is equipped and to which the bar 11 is kinematically connected.
  • Mounted in the bottom end of the bar 11 is a needle 12 pointing in the vertical direction Z-Z.
  • the work surface 5 supports, parallel with itself, a support plate 13 of a type known per se for supporting the tubular welt 2.
  • a vertical through hole in the support plate 13 allows the needle 12 to descend during sewing.
  • a sewing area 15 Between the sewing head 10 and the support plate 13 is a sewing area 15 through which the tubular welt 2 advances following a sewing line X-X from the folding unit 9 towards the entrainment means 8 in order to be sewn onto the edge 3 by the needle 12, as will become clearer in the course of the description.
  • the sewing line X-X is parallel to the support plate 13 and passes through the vertical line Z-Z on which the needle 12 lies.
  • the machine 1 Leading into the sewing area 15, the machine 1 includes means 14 known per se such as guides and walls for guiding the tubular welt 2 during its advance along the sewing line X-X.
  • the support plate 13 is basically rectangular and is oriented so as to present a first side parallel to the sewing line X-X at a limited predetermined distance therefrom.
  • the entrainment means 8 for the tubular welt 2 include a pair of contrarotating rollers 17 mounted in bearings in the frame on respective parallel axes of rotation extending in a direction Y-Y perpendicular to the sewing line X-X parallel to the support plate 13. With reference to the direction of advance of the tubular welt 2, the rollers 17 are positioned downstream of the sewing area 15, one above the other close to one side of the support plate 13 running the direction Y-Y to allow the tubular welt 2 leaving the sewing area 15 to pass between them. Via a known type of mechanical drive, not illustrated in the figures, the rollers 17 are turned by the motor of the machine 1 in order to draw the tubular welt 2 from the folding unit 9 and advance it along the sewing line X-X.
  • the unit 7 that feeds the fabric edge 3 includes a flat belt 18 running around a plurality of drive rollers 4 in a closed path that includes a straight portion R parallel to the sewing line X-X and adjacent to the abovementioned first side of the support plate 13 so as to be coplanar with it.
  • the drive rollers 4 of the flat belt 18 are mounted in bearings in the frame of the machine 1 and are turned by the latter's motor in order to advance the flat belt 18 along the abovementioned straight portion R in the same direction in which the tubular welt 2 advances along the sewing line X-X.
  • the folding unit 9 includes parting means for opening up the tubular welt 2 in a direction that is approximately perpendicular to the support plate during its advance and deflecting means for folding the opened tubular welt around the edge before it reaches the sewing area 15.
  • the abovementioned parting means preferably include a fork component 19, over which the tubular welt is fitted and advanced, having a head 16 to which there are connected, by a hinge connection, two rods 20 extending in the direction of advance of the tubular welt 2.
  • a spring 21 fitted to the head 16 acts on the rods 20 of the fork component 19 to push them elastically apart.
  • the fork component 19 is inserted between and held in position between opposing upper and lower pressing and guiding components 22 forming part of the folding unit 9 and arranged symmetrically about the support plate 13.
  • These pressing and guiding components 22 extend in the direction of advance of the tubular welt 2 and diverge from each other in the direction Z-Z perpendicular to the support plate 13, beginning at an entry point of the tubular welt 2 that is located between initial ends 23 of the pressing and guiding components 22.
  • the pressing and guiding components 22 are supported by the frame of the machine 1 in such a way that the angle A at which they are inclined to the support plate 13 can be varied.
  • the fork component 19 is positioned between the pressing and guiding components 22 so that the rods 20 are pushed apart by the spring 21 in the vertical direction Z-Z so that they push against the pressing and guiding components 22 and the head 16 projects from the entry point situated between the initial ends 23 of the pressing and guiding components 22. Consequently in the vertical direction Z-Z, the fork component 19 is positioned with its centre line level with the support plate 13.
  • the head 16 has a larger cross-section than the entry point.
  • the head 16 of the fork component 19 includes rollers 24 mounted so as to rotate about an axis parallel to the direction Y-Y to facilitate the forwarding of the tubular welt 2.
  • each pressing and guiding component 22 comprises at said initial end 23 a collar 25 mounted coaxially on a sleeve 26 that is supported by the frame of the machine 1 parallel to the axis Y-Y.
  • a screw clamp system known per se, is used to fix the collar 25 relative to the sleeve 26 so that, while the machine 1 is in operation, the angle of inclination at which the pressing and guiding component 22 is set relative to the support plate 13 cannot change.
  • Each pressing and guiding component 22 comprises pulleys 27 at each of its ends.
  • the axes of rotation of these pulleys are parallel to the direction Y-Y.
  • Circular-sectioned feed belts 28 run around these pulleys and their purpose is to press against the rods 20 of the fork component 19.
  • the pulley 27 at the initial end 23 of each pressing and guiding component 22 is fixed to the end of a shaft 29 supported coaxially inside the sleeve 26 and turned by the motor of the machine 1 via a mechanical drive which is not illustrated in the figure.
  • the abovementioned deflecting means of the folding unit 9 include a rod 31 supported level with the support plate 13 by the frame of the machine 1 so that its position with respect to the sewing line X-X can be adjusted in the direction Y-Y.
  • This rod 31 acts, parallel to the support plate 13, by means of one end 32 on the centre line of the tubular welt 2 fitted over the fork component 19, causing this tubular welt 2 to fold along the sewing line X-X in such a way as to produce a concavity pointing towards the straight portion R of the flat belt 18.
  • the tubular welt 2 emerging from the folding unit 9 is folded, by the action upon it of the rod 32, around the edge 3 carried by the flat belt 18 (Fig. 6), through the sewing area 15 and advancing along the sewing line X-X. After being sewn it passes between the contrarotating rollers 17 which draw it along.
  • tubular welt 2 Upstream of the folding unit 9 (Fig. 4) the tubular welt 2 is arranged so that its elasticized insert 2a is towards the flat belt 18.
  • the tubular welt 2 is fitted over the fork component 19 in such a way as to pass between the rods 20 and the belts 28 of the pressing and guiding components 22, which are rotated so as to help in forwarding the tubular welt 2.
  • the tubular welt 2 is opened up in the direction perpendicular to the support plate 13.
  • the greater cross-section of the head 16 compared to the entry point situated between the initial ends 23 of the pressing and guiding components 22 prevents the fork component 19 from being drawn along with the tubular welt 2 towards the sewing area 15, while the rollers 24 of the head 16 facilitate the insertion of the tubular welt 2 between the fork component 19 and the pressing and guiding components 22.
  • the elasticized insert 2a advantageously protects the tubular welt 2 from damage should the fork component 19 exert an excessive parting action.
  • the end 32 of the rod 31 acts on the elasticized insert 2a of the tubular welt 2 in order to fold the tubular welt 2 around the edge 3.
  • the elasticized insert 2a is advantageously thinner than the rest of the tubular welt 2 so that the lump formed by the part of the tubular welt 2 folded around the edge 3 is as small as possible.
  • the precision-stitch sewing machine according to the invention satisfies the abovementioned need without having the problems presented by the machines of the prior art.
  • the folding unit of the sewing machine according to the invention is able to fold the tubular welt around the fabric edge with precision, making it possible to produce a quality finish of the welt. It should also be remembered that folding a tubular welt instead of a strip welt around the edge of the fabric produces a firmer structure that is not only easier to control as it is advanced towards the sewing area but also has less tendency to shift out of the sewing line.
  • Another advantage of the precision-stitch sewing machine according to the invention is its adjustability, which enables it to be adjusted to tubular welts of different measurements.
  • the precision-stitch sewing machine is capable of applying tubular welts to edges simply and quickly, while at the same time guaranteeing a high quality of the resulting finish on both sides of the join.
  • a further advantage of the precision-stitch sewing machine according to the invention is that it is structurally and functionally simple, making it reliable in operation.

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

Claims (7)

  1. Machine à coudre de précision (1) pour appliquer une bordure tubulaire (2) le long d'une ligne de couture prédéterminée (X-X) sur un bord (3) d'une étoffe tricotée ou tissée ou analogue, du type qui comprend :
    une zone de couture (15) dans laquelle la bordure tubulaire (2) est appliquée sur le bord (3),
    une plaque d'appui (13) pour supporter la bordure tubulaire (2) dans la zone de couture (15), et
    un moyen d'entraínement (8) pour la bordure tubulaire (2),
    une unité de pliage (9) comprenant un moyen de. séparation (19) pour ouvrir la bordure tubulaire (2) dans une direction (Z-Z) sensiblement perpendiculaire à la plaque d'appui (13) au fur et à mesure qu'elle avance et un moyen de déviation (31) pour plier la bordure tubulaire ouverte (2) autour du bord (3),
       dans laquelle ledit moyen de séparation comprend une fourche (19), sur laquelle la bordure tubulaire (2) est ajustée et avancée, comportant deux tiges (20) s'étendant dans la direction de progression de la bordure tubulaire (2) et divergeant dans ladite direction (Z-Z),
       caractérisée en ce que :
    le moyen d'entraínement (8) est positionné en aval de la zone de couture (15) en référence à la direction de progression de la bordure tubulaire (2) le long de la ligne de couture (X-X),
    ladite fourche (19) comprend une tête (16) à laquelle lesdites tiges (20) sont reliées par une articulation, et
    un moyen de ressort (21) agit sur lesdites tiges (20) pour les écarter par poussée dans ladite direction (Z-Z) contre des éléments de pression et de guidage supérieur et inférieur opposés (22) qui sont supportés par la machine de manière que l'angle (A) auquel ils sont inclinés par rapport à la plaque d'appui (13) puisse être varié.
  2. Machine (1) selon la revendication 1, dans laquelle ladite unité de pliage (9) comprend des éléments de pression et de guidage supérieur et inférieur opposés (22) qui s'étendent dans la direction de progression de la bordure tubulaire (2) et divergent l'un de l'autre dans ladite direction (Z-Z), qui est sensiblement perpendiculaire à la plaque d'appui (13), depuis un point d'entrée de bordure tubulaire (2), la fourche (19) étant insérée et maintenue en position entre lesdits éléments de pression et de guidage (22) avec la tête (16) faisant saillie depuis ledit point d'entrée et la tête (16) de la fourche (19) ayant une plus grande section transversale que ledit point d'entrée afin d'empêcher que la fourche (19) soit attirée par la bordure tubulaire (2) au fur et à mesure de sa progression.
  3. Machine (1) selon la revendication 2, dans laquelle audit point d'entrée, chaque élément de pression et de guidage (22) comporte une première extrémité (23) autour de laquelle il est supporté de manière à être réglable angulairement par rapport à la plaque d'appui (13).
  4. Machine (1) selon la revendication 2, dans laquelle chacun desdits éléments de pression et de guidage opposés (22) comprend des courroies de distribution (28) entraínées en rotation par des poulies respectives (27) pour aider à distribuer la bordure tubulaire (2) sur la fourche (19) ;
  5. Machine (1) selon la revendication 4, dans laquelle lesdites tiges (20) de la fourche (19) comprennent des évidements (30) dans lesquels lesdites courroies s'ajustent et glissent.
  6. Machine (1) selon la revendication 4, dans laquelle la tête (16) de la fourche (19) comprend des galets (24) adaptés à tourner afin d'aider à distribuer la bordure tubulaire (2) à travers la zone de contact avec l'extrémité initiale (23) de chacun desdits éléments de pression et de guidage opposés (22).
  7. Machine (1) selon la revendication 1, dans laquelle ledit moyen de déviation comprend une tige (31) dont une extrémité (32) agit sur la bordure tubulaire ouverte (2) parallèlement à la plaque d'appui (13) pour plier la bordure tubulaire (2) autour du bord (3).
EP19960830254 1996-05-02 1996-05-02 Machine à coudre de précision pour le montage d'une bordure tubulaire au bord d'un tricot, un tissu ou analogue Expired - Lifetime EP0805228B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE1996617397 DE69617397T2 (de) 1996-05-02 1996-05-02 Präzisionsnähmaschine zum Ansetzen eines schlauchförmigen Bundes an den Rand eines gestrickten oder gewebten Stoffes oder dgl.
ES96830254T ES2164860T3 (es) 1996-05-02 1996-05-02 Maquina de coser con puntada de precision para la aplicacion de un ribete tubular a un borde de una tela tejida o de punto o similar.
EP19960830254 EP0805228B1 (fr) 1996-05-02 1996-05-02 Machine à coudre de précision pour le montage d'une bordure tubulaire au bord d'un tricot, un tissu ou analogue

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19960830254 EP0805228B1 (fr) 1996-05-02 1996-05-02 Machine à coudre de précision pour le montage d'une bordure tubulaire au bord d'un tricot, un tissu ou analogue

Publications (2)

Publication Number Publication Date
EP0805228A1 EP0805228A1 (fr) 1997-11-05
EP0805228B1 true EP0805228B1 (fr) 2001-11-28

Family

ID=8225896

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960830254 Expired - Lifetime EP0805228B1 (fr) 1996-05-02 1996-05-02 Machine à coudre de précision pour le montage d'une bordure tubulaire au bord d'un tricot, un tissu ou analogue

Country Status (3)

Country Link
EP (1) EP0805228B1 (fr)
DE (1) DE69617397T2 (fr)
ES (1) ES2164860T3 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1301732B1 (it) * 1998-06-17 2000-07-07 Conti Complett Spa Metodo e bordino per la realizzazione di rimagliature veloci conallineamento perfezionato.
CN113186664B (zh) * 2021-06-30 2021-10-29 南通英伦家纺有限公司 一种用于床上用品套件生产的包边机
KR102620463B1 (ko) * 2022-04-12 2024-01-03 주식회사 픽스로봇 재봉 장치 및 방법

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1154670A (en) * 1967-09-07 1969-06-11 Rimoldi C Spa Virginio Device for Attachment to a Sewing Machine for Applying Closed Tubular Strappings to Knitwear Articles.
US3811391A (en) * 1973-06-11 1974-05-21 Melco Ind Inc Sewing guide apparatus
IT1159823B (it) * 1983-01-10 1987-03-04 Exacta Spa Macchina cucitrice a punti precisi
IT1270014B (it) * 1994-09-26 1997-04-16 Conti Complett Spa Macchina cucitrice a punti precisi,particolarmente per l'applicazione di bordi in maglia a capi di abbigliamento o simili.

Also Published As

Publication number Publication date
EP0805228A1 (fr) 1997-11-05
DE69617397T2 (de) 2002-05-08
ES2164860T3 (es) 2002-03-01
DE69617397D1 (de) 2002-01-10

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