EP0768418B1 - Machine à broder, en particulier de type Schiffli, avec un dispositif pour sectionner et pincer le fil de face - Google Patents

Machine à broder, en particulier de type Schiffli, avec un dispositif pour sectionner et pincer le fil de face Download PDF

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Publication number
EP0768418B1
EP0768418B1 EP96810655A EP96810655A EP0768418B1 EP 0768418 B1 EP0768418 B1 EP 0768418B1 EP 96810655 A EP96810655 A EP 96810655A EP 96810655 A EP96810655 A EP 96810655A EP 0768418 B1 EP0768418 B1 EP 0768418B1
Authority
EP
European Patent Office
Prior art keywords
thread
knife
embroidering machine
machine according
cutting
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
EP96810655A
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German (de)
English (en)
Other versions
EP0768418A1 (fr
Inventor
Franz Lässer
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.)
Franz Laesser AG
Original Assignee
Franz Laesser AG
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 Franz Laesser AG filed Critical Franz Laesser AG
Publication of EP0768418A1 publication Critical patent/EP0768418A1/fr
Application granted granted Critical
Publication of EP0768418B1 publication Critical patent/EP0768418B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05C—EMBROIDERING; TUFTING
    • D05C11/00—Devices for guiding, feeding, handling, or treating the threads in embroidering machines; Machine needles; Operating or control mechanisms therefor
    • D05C11/20—Arrangements for cutting the needle or lower threads

Definitions

  • the present invention relates to an embroidery machine, especially Schifflistickmaschine, with a Front thread cutting and clamping device with one for each The front thread to be cut is arranged firmly on the presser Edge, a knife that can move against this edge and a thread clamp for clamping the front thread.
  • DE-A-226 828 a device for facilitating the Cutting the front threads described, at which tight Holding devices arranged on the embroidery surface are that they run from the needles to the fabric Front threads are able to hold on when these threads are cut should be.
  • the holding effect is achieved by forks or Clamping lever conveys which in relation to the Presser forks are movable.
  • the front threads are then between the presser forks and the other forks recorded on which the threads can be cut.
  • the needle-side thread ends are then held until the Embroidery needles are operated again for embroidering.
  • the cutting the threads can either be done by a knife with which one person walks along the machine and continues the threads that cut the knife, or cut it is a rotatable clamping lever with each presser fork provided that when it rotates against a knife edge the presser fork is guided around the thread at the same time to cut and hold the thread end.
  • the clamping and Cutting device which has an individually rotatable lever required for each of the many embroidery sites, but is complicated and expensive and does not have the required length Lifetime and reliability in operation. This is true also for the thread clamping and cutting device according to the CH-A-683 785 to. This device is not for cutting of the front thread, but for cutting the back or Schifflifadens. It therefore belongs to a genus other than the present invention.
  • EP-A-0 606 585 relates to one of the latest proposals for a cutting and clamping device for the front yarn one Embroidery machine.
  • This device has a mounting rail for Cutting and clamping elements.
  • a cutting and Clamping element consists of a fixed knife, which is attached to the mounting rail with retaining bolts. Over a Parallel guidance, which consists of hollow rivets, is on fixed knife a movable knife longitudinally displaceable guided.
  • the clamp spring has the additional task of play between the movable knife and the fixed knife avoid.
  • a complicated control mechanism is necessary. This must Carry out complicated movements in different directions.
  • the facility is further complicated by the fact that a Selection mechanism for working and non-working Embroidery is provided. To open the knife in front of the A sliding piece must be moved. Further is a parallelogram-like shift of all cutting and Clamping elements with a swiveling movement necessary. About that there is also a movement towards the material plane required.
  • the object of the present invention is an embroidery machine to improve the genus mentioned at the beginning in such a way that with perfect and reliable cutting with little effort and clamping the front threads of the embroidery machine guaranteed becomes.
  • This training does not require individually rotatable levers or cutting elements and therefore has space in a small space. Also can have a large number of knives on one piece of sheet metal be trained.
  • the mapping according to the invention allows simple way to grasp the front thread safely, reliably clamp and cut. This prevents jumping threads and later embroidering is possible.
  • the front thread is on each other opposite sides of the thread clamp gripped and secure introduced into this. In contrast to the prior art takes place also no change of direction of the front thread when clamping instead of. This also contributes to secure clamping.
  • An advantageous embodiment of the embroidery machine provides that at least two actuating levers by one articulated to them Rod are interconnected. This will make it a safe one Parallel guidance of the knife ruler guaranteed.
  • the Operating levers are advantageously designed as angle levers.
  • the clamping gap of the thread clamp is advantageously practically in on the same level as the thread to be cut. This extends from the needle to the embroidery floor before cutting.
  • the clamping gap can be practically perpendicular to the surface of the the presser forming sheet metal piece and practical in the same direction as the movement of the movable knife in Cutting the thread run.
  • that the clamping gap is arranged practically in the same plane is like the thread running from the needle to the embroidery base and that the direction of movement of the knife is practically rectangular is a thread.
  • the Clamping the thread does not deflect it.
  • the thread clamp advantageously has a recess for guidance of the knife.
  • the knife is between the Fabric presser plate and the thread clamp securely guided.
  • the thread clamp advantageously has a stationary part and a moving or resilient part. He sets it up own organ. In contrast to the state of the art not the presser or the knife part of the thread clamp. Since it represents its own organ, it can be used if necessary be replaced independently of other organs.
  • the thread clamp advantageously has teeth on one of the two the surfaces forming the clamping gap. This makes a high one Reliability of thread clamping guaranteed. The teeth are arranged on the knife side and advantageously grip on the side Clamping gap in a recess. This has turned out to be special proven advantageous.
  • the thread clamp is there expediently made of plastic. This allows one particularly cost-effective production of thread clamps with optimal Clamping properties.
  • the stationary part Be U-shaped, with the resilient part between the legs of the U is arranged.
  • the resilient part can also have curved plastic spring, which is a special favorable thread clamping allows.
  • the plastic spring expediently acts after insertion of the resilient part in the stationary part with a predetermined force against the opening of the clamping gap. This there is no need for adjustment.
  • a stop can be provided to guide the way limited by which the clamping gap can be opened. In order to prevents e.g. the threading tool when threading is accidentally inserted into the nip and the Thread clamp damaged.
  • the perspective view of the front thread cutting and clamping device of Figure 1 shows the one Presser ruler 11 (Fig. 3) attached presser plates 13 with the presser fingers 15. At the lower part of the A presser finger 15 has a cutting edge 17. At Each presser finger 15 is a movable knife 19 arranged. A large number of such knives 19 can be on one Sheet metal piece 20 may be formed. Each knife 19 has one hook-shaped part 21, which acts on the one hand as a thread catcher and on the other hand, has a cutting edge 22 which is connected to the cutting edge 17 works together like scissors. The sheet metal pieces 20 with the Knives 19 are carried by the knife ruler 23. Also on Knife rulers 23 are thread catchers 25 with angled edges 26 arranged.
  • Thread clamps 27 are on the presser plate 13 attached, which will be described in detail later. It it should be noted that with each thread clamp 27 the knife 19 on one and the other thread catcher 25 on the other Come to lie so that the thread at the Downward movement of the knife ruler 23 from the hook-shaped part 21 and the further thread catcher 25 securely in the clamping gap 29 of the Thread clamp 27 is pulled, while at the same time through the Cooperation of cutting edge 17 and that on hook-shaped part 21 trained cutting edge 22 of the thread is cut.
  • Fig.1 are also a needle plunger 26 with a needle 28 and a drill plunger 30 with a drill 32 as shown are provided for each embroidery site. It can be seen that in the described formation of the front thread and Clamping device is not in the way of the drill 32.
  • FIGS. 2 and 3 From Figures 2 and 3 are now further details of Front thread cutting and clamping device can be seen.
  • the Device will be in position after cutting the thread shown.
  • the knife ruler 23 with the also as Thread catcher acting knife 19 and the further thread catcher 25 is in the lower position.
  • the presser 13 is in the position in which the presser finger 15 on the embroidery base 31, that is the fabric web.
  • the knife ruler 23 there are pins at intervals arranged, which guide the knife ruler 23.
  • One of the cones 33 can be seen in FIG. 3.
  • This pin 33 is in one Bush 35 of the presser ruler 11 slidably mounted.
  • the presser ruler 11 is about an axis 37 of the ball joints 39 (only a ball joint 39 is shown) pivotable.
  • reference number 41 denotes the rod which is used for The presser mechanism of an embroidery machine is one of them.
  • the drive the presser represents known prior art.
  • the knife ruler 23 is made up of two pairs of levers 47, 51 (only one is shown) worn.
  • the drive of the knife ruler 23 serves the drive unit 43, e.g. a hydraulic cylinder, which engages the arm 45 of the angle lever 47.
  • the arm 49 is articulated on the lever 51 via the ball joint 39.
  • the lever 51 is coupled to the knife ruler 23.
  • the parallel guidance of the knife ruler 23 is by the Lever pairs 47.51 (only one is shown) ensures the angle lever 47 coupled to each other via a rod 55 are. Now is an advantage if after cutting the threads the fulcrum 40 lies on the axis of rotation 37. This will make one Movement of the lever 51 when pivoting the presser fingers 15 avoided about the axis 37. This in turn prevents one Relative movement between the movable knives 19 and Cut 17, which could lead to premature wear.
  • FIGS. 4 to 10, in particular FIG. 8, show, there is the thread clamp 27, for example, from a stationary part 61 and a resilient part 63.
  • a screw 65 holds the parts 61 and 63 together.
  • a Screw hole 67 is for fastening the thread clamp 27 with the screw 72 (Fig. 9) on the presser plate 13.
  • a pin 68 engaging in the bore 70 acts as Protection against rotation.
  • the thread clamp 27 has a clamping gap 29 which is practically perpendicular to the surface of the Presser plate 13 and in the same direction as that Movement of the movable knife 19 when cutting the thread runs.
  • the thread clamp 27 has the knife side at one Clamping gap 29 forming teeth 69.
  • the exemplary embodiment has teeth 69 on the side of the clamping gap 29 arranged and can in a recess 71 (Fig.5) of engage resilient part 63.
  • the guidance of the knife 19 is used the recess 77.
  • the stationary part 61 is U-shaped.
  • the resilient part 63 is between the legs of the U. arranged.
  • the spring action is provided on part 63 formed arcuate plastic spring 73.
  • a stop 75 limits the opening of the clamping gap 29.
  • the embroidery machine is in normal operation Device in the position shown in Figures 2 and 3, wherein but the presser finger 15 after each stitch about the axis 37 (Fig.3) pivoted counterclockwise and from Embroidery base 31 can be lifted off. Now the thread should be cut the presser is again in the in Figure 3 location shown. Be by the drive unit 43 then the levers 47, 51 and thus also the knife ruler 23 operated. The knife ruler 23 is therefore up in the in Figure 1 shifted position shown on the left. The angled edge 26 further presses Thread catcher 25 between the embroidery base 31 and the needle 28 tensioned thread 74 (Fig.10) slightly to the side, whereupon the thread 74 springs back into the original position.
  • Thread 74 both from the movable knife 19 and from the other Thread catcher 25 is gripped and pulled into the clamping gap 29 and finally by the interaction of the cutting edge 22 on hook-shaped part 21 and the cutting edge 17 (Fig.1) cut.
  • the cutting is done like with scissors.
  • the thread end remains clamped in the thread clamp 27, so that subsequently can be easily sewn on.
  • the embroidery machine has a pivotable about the axis 37 Presser ruler 11 with the presser fingers 15. On a cutting edge 17 is formed on the presser fingers 15. A knife ruler 23 is on the presser ruler 11 arranged, from the position shown upwards can be moved. On the knife ruler 23 are both Knives 21, which also serve as thread catchers and others Thread catcher 25 arranged. Between a knife 21 and a Thread catcher 25 is located on the presser plate 13 attached thread clamp 27. Now thread 74 should be cut the knife ruler 23 is moved up and again brought into the drawn position. The will Thread 74 from knife 19 running parallel to clamping gap 29 and captured by the thread catcher 25 and down into the nip 29 of the thread clamp 27 pulled. By interaction of Knife 19 and cutting edge 17 becomes the thread 74 as with a Cut scissors.

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

Claims (15)

  1. Machine à broder en particulier machine à broder du type Schiffli, avec un dispositif pour sectionner et pincer le fil de face, avec un tranchant (17) disposé rigidement sur le presseur d'étoffe (13) pour chaque fil de face à sectionner, avec une lame (21) mobile par rapport à ce tranchant (17) et avec un pince-fil (27) destiné à pincer le fil de face, caractérisée en ce que la lame (21) est réalisée sous la forme d'un capte-fil, en ce que, à distance de la lame (21), est prévu un autre capte-fil, et en ce que le pince-fil (27) est disposé entre la lame (21) et l'autre capte-fil (25).
  2. Machine à broder selon la revendication 1, dans laquelle les presseurs d'étoffe (15) sont disposés sur un guide de presseur d'étoffe (23) susceptible de pivoter autour d'un axe (37), caractérisée en ce que les lames (21) et les autres capte-fils (25) sont fixés sur un guide de lame (23) disposé sur le guide de presseur d'étoffe (11), en ce que l'entraínement du guide de lame (23) s'effectue par l'intermédiaire d'au moins un levier (51), dont une extrémité est articulée sur le guide de lame (23) et dont l'autre extrémité présente une articulation (39) sur laquelle agit un levier d'actionnement (47), de sorte qu'après sectionnement des fils, le centre de rotation (40) de l'articulation (39) est situé sur l'axe de rotation (37) autour duquel le guide de presseur d'étoffe (11) pivote lors de la broderie.
  3. Machine à broder selon la revendication 2, caractérisée en ce qu'au moins deux leviers d'actionnement (47) sont reliés ensemble au moyen d'une barre (55) articulée à ceux-ci.
  4. Machine à broder selon la revendication 2 ou 3, caractérisée en ce que le ou les leviers d'actionnement (47) sont des leviers coudés.
  5. Machine à broder selon l'une des revendications 1 à 4, caractérisée en ce que l'intervalle de pincage (29) du pince-fil (27) est situé pratiquement dans le même plan que celui dans lequel se trouve le fil à sectionner.
  6. Machine à broder selon l'une des revendications 1 à 5, caractérisée en ce que l'intervalle de pincage (29) s'étend pratiquement à angle droit par rapport à la surface de la pièce de tôle (13) constituant le presseur d'étoffe (15) et s'étend pratiquement dans la même direction que celle du déplacement de la lame (19) lors du sectionnement du fil.
  7. Machine à broder selon l'une des revendications 1 à 6, caractérisée en ce que le pince-fil (27) présente un évidement (77) destiné à guider la lame (19).
  8. Machine à broder selon l'une des revendications 1 à 7, caractérisée en ce que le pince-fil (27) présente une partie stationnaire (61) et une partie (63) mobile ou élastique.
  9. Machine à broder selon la revendication 8, caractérisée en ce que le pince-fil (27) présente, pour une surface constituant l'intervalle de pincage (29), des dents (69).
  10. Machine à broder selon la revendication 9, caractérisée en ce que les dents (69) s'engagent latéralement sur l'intervalle de pincage (29), dans un évidement (71) appartenant à l'autre partie du pince-fil (27).
  11. Machine à broder selon l'une des revendications 1 à 8, caractérisée en ce que le pince-fil (27) est réalisé en matière plastique.
  12. Machine à broder selon l'une des revendications 1 à 11, caractérisée en ce que la partie stationnaire (61) est en forme de U, et en ce qu'entre les branches du U est disposée la partie élastique (63) sur laquelle est constitué un ressort en matière plastique (73) arqué.
  13. Machine à broder selon la revendication 12, caractérisée en ce que le ressort en matière plastique (73), après insertion de la partie élastique, agit à l'encontre de l'ouverture de l'intervalle de pincage (29), à l'aide d'une force prédéterminée.
  14. Machine à broder selon la revendication 12, caractérisée en ce qu'est prévue une butée (75) qui limite la course sur laquelle l'intervalle de pincage (29) peut être ouvert.
  15. Pinceur de fil de face selon l'une des revendications 5 à 14.
EP96810655A 1995-10-16 1996-10-02 Machine à broder, en particulier de type Schiffli, avec un dispositif pour sectionner et pincer le fil de face Expired - Lifetime EP0768418B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2922/95 1995-10-16
CH292295 1995-10-16

Publications (2)

Publication Number Publication Date
EP0768418A1 EP0768418A1 (fr) 1997-04-16
EP0768418B1 true EP0768418B1 (fr) 1999-03-31

Family

ID=4244641

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810655A Expired - Lifetime EP0768418B1 (fr) 1995-10-16 1996-10-02 Machine à broder, en particulier de type Schiffli, avec un dispositif pour sectionner et pincer le fil de face

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Country Link
EP (1) EP0768418B1 (fr)
AT (1) ATE178370T1 (fr)
DE (1) DE59601549D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101591843B (zh) * 2009-06-19 2011-11-09 杭州经纬电子机械制造股份有限公司 刺绣机自动夹线系统

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1888181B (zh) * 2006-07-20 2010-05-12 李红女 植绒绣绣花机的勾线和剪线装置
CH712431A1 (de) * 2016-05-03 2017-11-15 Lässer Ag Verfahren zur Betätigung einer Fadenschneid- und Fadenklemmvorrichtung zum Schneiden des Schiffchenfadens an einer Grossstickmaschine sowie eine Vorrichtung zur Durchführung des Verfahrens.
CH712727A1 (de) 2016-07-21 2018-01-31 Lässer Ag Stickmaschine, insbesondere Schiffchenstickmaschine.
CN108342847B (zh) * 2017-01-23 2020-08-04 北京大豪科技股份有限公司 刺绣机剪线过程的控制方法及系统
CN111139603A (zh) * 2020-03-18 2020-05-12 诸暨市宏益机械厂 一种用于电脑刺绣机的剪线机构

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE226828C (fr) *
DE279660C (fr) *
US1367791A (en) * 1919-11-15 1921-02-08 Alexandre Lily Thread cutter and holder
DE2344720C3 (de) * 1973-09-05 1981-04-09 Pfaff Industriemaschinen GmbH, 6750 Kaiserlautern Einrichtung an Stickmaschinen zum Klemmen und Schneiden des Nadelfadens
CH667474A5 (de) * 1985-09-10 1988-10-14 Gegauf Fritz Ag Fadenklemm- und schneidvorrichtung fuer naehfaeden an einer naehmaschine.
DE4300846A1 (de) * 1993-01-15 1994-07-21 Saurer Sticksysteme Ag Arbon Schneide- und Klemmeinrichtung für Vordergarn für Stickmaschinen
DE4316916C2 (de) * 1993-05-20 1996-07-04 Saurer Sticksysteme Ag Selbstreinigende Fadenklemme
ATE156531T1 (de) * 1994-02-05 1997-08-15 Saurer Sticksysteme Ag Verfahren zum ansticken der nadel- und schiffchenfäden am stoff einer stickmaschine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101591843B (zh) * 2009-06-19 2011-11-09 杭州经纬电子机械制造股份有限公司 刺绣机自动夹线系统

Also Published As

Publication number Publication date
ATE178370T1 (de) 1999-04-15
EP0768418A1 (fr) 1997-04-16
DE59601549D1 (de) 1999-05-06

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