EP0049312B1 - Machine à coudre - Google Patents

Machine à coudre Download PDF

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Publication number
EP0049312B1
EP0049312B1 EP81100441A EP81100441A EP0049312B1 EP 0049312 B1 EP0049312 B1 EP 0049312B1 EP 81100441 A EP81100441 A EP 81100441A EP 81100441 A EP81100441 A EP 81100441A EP 0049312 B1 EP0049312 B1 EP 0049312B1
Authority
EP
European Patent Office
Prior art keywords
needle plate
sewing
presser
machine
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
Application number
EP81100441A
Other languages
German (de)
English (en)
Other versions
EP0049312A1 (fr
Inventor
Siegfried Dipl.-Ing. Mende
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.)
Kombinat Textima VEB
Original Assignee
Kombinat Textima VEB
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 Kombinat Textima VEB filed Critical Kombinat Textima VEB
Priority to AT81100441T priority Critical patent/ATE10654T1/de
Publication of EP0049312A1 publication Critical patent/EP0049312A1/fr
Application granted granted Critical
Publication of EP0049312B1 publication Critical patent/EP0049312B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B73/00—Casings
    • D05B73/04—Lower casings
    • D05B73/12—Slides; Needle plates

Definitions

  • the invention relates to a sewing machine, which is equipped for guiding and transporting the sewing material with a stitch plate attached to a stitch plate receiving bar of a machine bed, a spring-loaded fabric presser arranged above the stitch plate and with a fabric slide located underneath, which temporarily passes through slots in the stitch plate and rises from the level of the latter in order to transport the sewing material.
  • the means provided for this are essentially two springs of different strengths, which give the presser a system with a low degree of persistence on the material to be sewn when the presser is on a flat part of the material, and which press the presser more firmly onto the material if a hem or another obstacle to be overcome.
  • the sewing process is associated with strong vibrations.
  • the invention is now based on the new finding that the known natural vibrations of the needle plate, which arise during the sewing process in particular in the fabric presser / needle plate vibration system, form one of the causes for the material presser lifting off the material to be sewn.
  • a second basis for the present invention consists in the further realization that the time at which the sewing material is at rest on high-speed sewing machines is not sufficient for the free vibrations of the cloth presser and the throat plate to subside.
  • the presser / throat plate vibration system is to be improved in such a way that there are no disturbing overlaps of its free vibrations with the forced vibrations of the presser / slide valve system.
  • the invention characterized in the claims sets itself the task of creating a sewing machine in which the lifting of the presser during the sewing process is further suppressed by the free vibrations of the presser / throat plate system due to a reduction in the natural vibration behavior of the throat plate and a reduction in the spring stiffness of the latter is hindered.
  • This object is achieved in that the part of the throat plate opposite the presser is freely arranged on three sides in a recess in the machine bed and that the throat plate is fastened to the side of the presser on the machine bed by means of its fourth machine-facing side.
  • the presser / throat plate system swings out sooner than is the case if the throat plate lies directly on an uninterrupted throat plate receiving bar, as before, without special precautions.
  • the arrangement and attachment of the throat plate is such that the free vibrations of the material presser / throat plate system have sufficiently subsided due to the reduction in the spring stiffness of the throat plate before the fabric pusher transports the sewing material again and sets the fabric presser in forced vibrations. A disturbing superposition of the mentioned types of vibration does not occur.
  • the sewing machine comprises a needle bar 1 with a clamped sewing needle 2, which can be moved vertically in the usual way.
  • a presser 4 under the pressure of a spring 3 and a cloth pusher 5 also belong to the sewing tools.
  • the material 8 receives its guidance between the presser 4 and a needle plate 7 fastened to a machine bed 6.
  • the stitch plate 7 is provided with slots 7a, which the fabric pusher 5 passes through temporarily in order to rise out of the plane of the stitch plate 7 and to transport the sewing material 8.
  • the slider 5 and the throat plate 7 are accommodated in a recess 9 of the machine bed 6, which is partially delimited by a throat plate receiving bar 6a and also receives a thread gripping device, not shown.
  • a lockstitch or chain stitch sewing machine can form the basis for the invention shown here.
  • the throat plate 7 was fastened in such a way that its natural vibration behavior leads to a reduction in the free vibrations of the presser 4 / throat plate 7 system in that the selected arrangement provides less spring stiffness for the throat
  • Fig. 2 shows such a receptacle for a needle plate 7, in which the needle plate receiving bar 6a on each side of the needle plate 7 between attachment points 10; 11 and a slide plate 12 is provided with an interruption 13.
  • the part of the throat plate 7 opposite the presser 4 receives an arrangement on three sides free in the recess 9 of the machine bed 6, which corresponds to a reduction in the spring stiffness of the throat plate 7 compared to the conventional fixed position of the throat plate.
  • Screws are preferably used as the type of fastening, which hold the throat plate 7 on its fourth machine-facing side to the side of the presser 4 on the machine bed 6.
  • the throat plate 7 was instead of the interruptions 13 with incisions 14; 15 equipped, which are incorporated approximately transversely to the sewing direction in the part of the needle plate 7 opposite the presser 4. It is also possible with this possible solution to make additional interruptions 13 in the throat plate receiving bar 6a.
  • the cloth pusher 5 passes through the slots 7a of the needle plate 7 during the sewing process, thereby pressing against the sewing material 8 in order to transport the same, the cloth pusher 5 sets the cloth presser 4 resting on the sewing material 8 in forced vibrations.
  • the presser 4 is lifted off the throat plate 7.
  • the sewing tools fabric presser 4 and fabric pusher 5 swing together as a system in this phase.
  • the cloth presser 4 hits the stitch plate 7 again, with the sewing material 8 being in between.
  • Free vibrations of the system presser 4 / throat plate 7 begin in this phase, which can be suppressed with the means of the described invention in such a way that the vibrations have subsided sufficiently before the system presser 4 / pusher 5 begins to vibrate again. Thus there is no disruptive superimposition of vibrations of both systems.
  • the interruption 13 of the throat plate receiving bar 6a or the incisions 14; 15 of the throat plate 7 each have different lengths. It is also pertinent to use sewing machines with interruptions 13 and cuts 14; 15 to be provided. Under certain circumstances, a one-sided interruption 13 and / or an incision 14 is also sufficient; 15 to achieve the purpose to be achieved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Inorganic Insulating Materials (AREA)
  • Massaging Devices (AREA)

Claims (3)

1. Machine à coudre qui comporte, pour le guidage et le transport de la pièce à coudre, une plaque à aiguille fixée dans le logement de plaque à aiguille d'une plaque de recouvrement, un pied presseur monté d'une manière élastique au-dessus de la plaque à aiguille et une griffe d'entraînement, située au-dessous, qui traverse temporairement des rainures ménagées dans la plaque à aiguille pour s'élever au-dessus du plan de celle-ci et transporter la pièce à coudre, caractérisée en ce que
- la partie de la plaque à aiguille (7) qui se trouve en face du pied presseur (4) est montée dans un évidement (9) de la plaque de recouvrement (6) de manière à être libre sur trois côtés, et
- en ce que la plaque à aiguille (7) est fixée solidement à la plaque de recouvrement (6), sur le côté du pied presseur, par son quatrième côté tourné vers la machine.
2. Machine à coudre selon la revendication 1, caractérisée en ce que les bandes de support (6a) de la plaque à aiguille qui se trouvent de part et d'autre de la plaque à aiguille (7) comportent, entre des zones de fixation (10, 11) et une plaque coulissante (12), des interruptions (13).
3. Machine à coudre selon la revendication 1, caractérisée en ce que la partie de la plaque à aiguille (7) qui est en face du pied presseur (4) comporte deux entailles (14, 15) ménagées à peu près perpendiculairement à la direction de couture.
EP81100441A 1980-10-03 1981-01-22 Machine à coudre Expired EP0049312B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81100441T ATE10654T1 (de) 1980-10-03 1981-01-22 Naehmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DD80224305A DD153401A1 (de) 1980-10-03 1980-10-03 Naehmaschine
DD224305 1980-10-03

Publications (2)

Publication Number Publication Date
EP0049312A1 EP0049312A1 (fr) 1982-04-14
EP0049312B1 true EP0049312B1 (fr) 1984-12-05

Family

ID=5526577

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81100441A Expired EP0049312B1 (fr) 1980-10-03 1981-01-22 Machine à coudre

Country Status (4)

Country Link
EP (1) EP0049312B1 (fr)
AT (1) ATE10654T1 (fr)
DD (1) DD153401A1 (fr)
DE (1) DE3167520D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9982066B2 (en) * 2015-06-30 2018-05-29 The Procter & Gamble Company Method for purifying contaminated polymers

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2500731A (en) * 1945-09-25 1950-03-14 Singer Mfg Co Throat plate for sewing machines
DE885194C (de) * 1950-09-14 1953-08-03 Union Special Machine Co Naehmaschine
US2703543A (en) * 1953-02-06 1955-03-08 Emma D Needs Sewing machine construction
US3221688A (en) * 1962-04-12 1965-12-07 Rimoldi C Spa Virginio Overlock sewing machine
US3373709A (en) * 1965-12-23 1968-03-19 Singer Co Sewing machine throat plate locating and securing means
FR90496E (fr) * 1966-07-27 1967-12-22 Rhodiaceta Procédé et appareil pour la couture d'éléments plats tels notamment que des tissus ou des feuilles

Also Published As

Publication number Publication date
EP0049312A1 (fr) 1982-04-14
DD153401A1 (de) 1982-01-06
ATE10654T1 (de) 1984-12-15
DE3167520D1 (en) 1985-01-17

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