EP1681380B1 - Dispositif de transport par dessus pour machines à coudre - Google Patents

Dispositif de transport par dessus pour machines à coudre Download PDF

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Publication number
EP1681380B1
EP1681380B1 EP05405634A EP05405634A EP1681380B1 EP 1681380 B1 EP1681380 B1 EP 1681380B1 EP 05405634 A EP05405634 A EP 05405634A EP 05405634 A EP05405634 A EP 05405634A EP 1681380 B1 EP1681380 B1 EP 1681380B1
Authority
EP
European Patent Office
Prior art keywords
upper transport
foot
arm
transport foot
transport device
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
EP05405634A
Other languages
German (de)
English (en)
Other versions
EP1681380A1 (fr
Inventor
Peter Hintzen
André Stucki
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.)
BERNINA International AG
Original Assignee
BERNINA International 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 BERNINA International AG filed Critical BERNINA International AG
Publication of EP1681380A1 publication Critical patent/EP1681380A1/fr
Application granted granted Critical
Publication of EP1681380B1 publication Critical patent/EP1681380B1/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
    • D05B29/00—Pressers; Presser feet
    • D05B29/06—Presser feet
    • D05B29/08—Presser feet comprising relatively-movable parts
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/02—Work-feeding means with feed dogs having horizontal and vertical movements
    • D05B27/04—Work-feeding means with feed dogs having horizontal and vertical movements arranged above the workpieces

Definitions

  • the invention relates to an upper transport device for sewing machines according to the preamble of patent claim 1.
  • Top conveyors on sewing machines are known. They serve to transport the fabric from the top in the sewing direction synchronously to the arranged under the fabric in the lower arm feed and thereby ensure that between the overhead fabric and the underlying no mutual displacement.
  • a known device is in the DE-C1 3435633 as well as in the 3,583,343 described. This includes in addition to the sewing machine vertically movable mounted, under spring pressure pusher rod, at the bottom of the presser foot is fixed, an upper transport foot, which is driven by an operatively connected to the drive of the sewing machine arm. If the upper transport foot to be effective, it is connected by the seamstress with the lower end of the arm, that is hung at the lower end and there of a spring retracting the upper transport foot.
  • the lower arm end acts on the shaft of the upper transport foot.
  • the upper transport foot if the upper transport foot is not needed, it can be unhooked from the arm and then slides, pulled upwards by the spring, until the foot ends against the lower end of the arm.
  • the sole of the top feed foot is always at a distance of approx. 15mm from the needle plate and does not affect the sewing process anymore.
  • the distance of the upper transport foot sole is so small that no known accessories can be attached to the Nähfussstange.
  • the handling of the seamstress in the area of the presser foot is hindered by the upper transport foot.
  • An object of the present invention is to provide an upper transport device which can be moved upwards when not in use such that commercially available additional devices can be attached to the presser foot bar and optimum handling of the material is possible when the upper transport is not in use.
  • a further object of the present invention is to design the top feed in such a way that its adjustment with respect to the presser foot and the throat plate can be carried out without dismantling the casing part.
  • a further advantage of the invention in a preferred embodiment is that for the adjustment of the upper transport foot in the sewing direction and in the vertical direction no casing on the machine housing must be removed. It is also possible to replace the upper transport foot similar to the presser foot and replace it with one that is adapted to the material to be processed. In a further advantageous embodiment, only the sole of the foot can also be exchanged on the upper transport foot in order likewise to adapt its structure to the material to be processed.
  • a household sewing machine is shown schematically with reference numeral 1 with a free arm 3, an upper arm 5, a base plate 7, on which the housing part 9 is arranged, which carries the upper arm 5 and the free arm 3.
  • a presser bar 11 and attached to it a presser foot 13 visible.
  • an upper transport foot 15 and a drive arm actuating the upper transport foot 15, hereinafter referred to as arm 17, are visible behind the presser bar 11.
  • the two essential elements of the inventive upper transport are the formation of the upper transport foot 15 and the arm 17.
  • the arm 17 comprises two spaced-apart, parallel arm portions 17a and 17b, which are held together and form a guide space therebetween.
  • the upper and lower ends of the arm 17 can be held together by links 23 and 24 ( Figure 9).
  • the upper ends of the two arm portions 17a, 17b are articulated to the drive kinematics by means of a bolt 25, which the holes 26 in the arm portions 17a, 17b penetrates (see Figure 3).
  • the two arm portions 17a, 17b are also each a longitudinally extending guide slot 27 is inserted.
  • These two guide slots 27 serve to guide the upper transport foot 15, at the upper end of which a guide pin 28 engaging in the guide slots 27 is inserted (FIG. 4).
  • the upper transport foot 15 is guided laterally with little play in the guide space between the inner sides of the two arm sections 17a, 17b.
  • In the raised position ( Figure 3) is the upper transport foot 15 with its upper end and with its lower end near the upper transport footpad 29 between the two arm portions 17a, 17b.
  • the upper transport foot 15 has the shape of a two-armed lever, wherein the connection point 14 (knee) of the two lever sections 16a, 16b comes to rest in the lifted position outside the two arm sections 17a, 17b.
  • the upper transport foot 15 is then laterally guided in the region of its upper lever portion 16b with the guide pin 28 in the guide slots 27 on the arm 17 and in the region of its lower lever portion 16a in the guide space of the arm 17.
  • the two ends of the bolt 28 at the end of the upper lever portion 16b of the upper transport foot 15 are in the rest position at the upper end of the slots 27 at. In this rest position is the Obertransportfuss 15 held by a spring 31, which is mounted on the one hand on the connecting member 23 between the tabs 33 on the arm 17 and on the other hand held on the upper transport foot 15 (breakpoint not visible).
  • At least one guide cam 35 is integrally formed on the latter, which - if the upper transport foot 15 is not in working position - slidably abuts the rear edges of the two arm sections 17a, 17b.
  • the tip of the upper transport foot sole 29 is in the rest position consequently at the level of the lower end 20 of the arm 17 and approximately at the height of the junction between the presser foot 13 and the pusher bar 11 (see Figure 3).
  • the upper transport foot 15 In the working position ( Figure 4), the upper transport foot 15 is pulled against the force of the spring 31 by hand on the cam 37 down or pushed, led up with the bolt 28 in the guide slots 27 and guided laterally between the arm portions 17a, 17b.
  • the upper transport foot 15 pivots in the direction of the presser foot 13 and engages in the recess 18 mounted there (FIG. 8).
  • at least the guide cam 35 on the upper leg of the upper transport foot 15 slides under the lower end 20 of the arm 17 (shown in FIGS. 5 and 8) and engages there.
  • the upper transport foot 15 In this position, the upper transport foot 15 is positively in operative connection with the arm 17 and can be driven by this and the latter acting on the latter above linkage.
  • the adjustment of the upper transport foot in horizontal Direction is done by two clamping screws 45 which engage in a mounted on a hinged on the sewing machine housing attachment lever 47 slot 48.
  • the clamping screw 45 of the front mounting lever 47 has not been shown or omitted in Figure 8 to make the slot 48 visible.
  • the fastening lever 47 is pivotally connected to a link 49 with a pendulum arm 51. By loosening the clamping screws 45 and moving the fastening tabs 47 in the slot, the arm 17 is moved horizontally by the connecting member 49, which is articulated on the fastening lever 47.
  • the upper portion 16 b of the upper transport foot 15 is guided by the guide pins 28 in the slots 27 of the arm 17.
  • this connection can be achieved by suitable means and thus the upper transport foot 15 can be removed from the arm 17 and replaced by one with a differently designed sole 53.
  • the connection between the spring 31 and the upper transport foot 15 must be released. The loosening of the upper transport foot 15 from the arm 17 takes place in that the hook-shaped upper end 30, which is locked on the guide pin 28, is released from the latter (hook-shaped end 30 visible in FIG. 11).
  • the lower leg 16a of the upper transport foot 15 is detachably formed by the upper leg 16b.
  • the upper end of the lower leg 16a engages in a slot 32 in the junction 14 to the upper leg 16b and can be secured by a suitable locking means 34.
  • locking means 34 a clamping screw or the like can be used.
  • only the sole 53 on the lower leg 16a is removed for changing the properties of the upper transport foot 15.
  • the connection between the sole 53 and the lower end 55 of the lower leg 16a can be made for example by a sliding fit, a dovetail connection or the like.
  • the replacement of the upper transport foot 15 by another with a differently designed sole 53 serves to adapt the upper transport foot 15 to the material to be processed or its surface properties.
  • Very fine fabrics, such as silk, require differently shaped upper-transport foot pads 53 as materials with a very coarse structure.

Landscapes

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

Claims (10)

  1. Dispositif de transport par le dessus pour des machines à coudre (1), comprenant une tringle à poussoir (11), un pied de poussoir (13) étant fixé sur l'extrémité inférieure de ladite tige, lequel comporte sur sa semelle un évidement (18) pour introduire un pied de transport par le dessus (15) porté par une tige (16), et comprenant une tringlerie reliée avec l'entraînement de la machine à coudre (1) pour l'entraînement de l'avance et du soulèvement d'un bras (17) qui emmène le pied de transport par le dessus (15),
    caractérisé en ce que
    le bras (17) comporte deux tronçons de bras (17a, 17b) formant un guidage latéral et entre lesquels la tige (16) du pied de transport par le dessus (15) est maintenue avec faculté de translation.
  2. Dispositif de transport par le dessus selon la revendication 1, caractérisé en ce que les deux tronçons de bras (17a, 17b) sont reliés entre eux par au moins un organe de liaison (23) et en ce que des rainures (27) s'étendant en direction longitudinale dans les tronçons de bras (17a, 17b) sont réalisées sur la tige (16) du pied de transport par le dessus (15) comme guidages pour un goujon (28).
  3. Dispositif de transport par le dessus selon l'une ou l'autre des revendications 1 et 2, caractérisé en ce que la tige (16) du pied de transport par le dessus (15) est réalisée comme levier à deux bras, sachant que le tronçon inférieur de bras de levier (16a) porte la semelle de pied de transport (29) et que le goujon (28) est placé sur l'extrémité supérieure du tronçon supérieur de bras de levier (16b), ledit goujon étant guidé en glissement latéralement dans les rainures de guidage (27) dans les tronçons de bras (17a, 17b) du bras (17).
  4. Dispositif de transport par le dessus selon l'une ou l'autre des revendications 2 et 3, caractérisé en ce que l'extrémité supérieure du pied de transport par le dessus (15) est reliée de manière amovible avec le goujon (28).
  5. Dispositif de transport par le dessus selon la revendication 4, caractérisé en ce que le pied de transport par le dessus (15) est relié à une extrémité supérieure en forme de crochet (30) en étant accroché sur le goujon (28).
  6. Dispositif de transport par le dessus selon l'une des revendications 1 à 5, caractérisé en ce que le bras (17) avec le pied de transport par le dessus (15) guidé dessus peut être réglé et déplacé en direction horizontale et verticale par l'intermédiaire d'un moyen de réglage et de déplacement.
  7. Dispositif de transport par le dessus selon l'une des revendications 1 à 6, caractérisé en ce que le bras (17) avec le pied de transport par le dessus (15) accroché dessus peut être déplacé horizontalement dans le guidage en forme de rainure avec une vis de blocage (45).
  8. Dispositif de transport par le dessus selon l'une des revendications 2 à 7, caractérisé en ce que des cames de guidage (35) sont montées sur le tronçon supérieur de bras de levier (16b) du pied de transport par le dessus (15), lesquelles viennent s'appliquer sur la partie dorsale du bras (17) dans la position de repos du pied de transport par le dessus (15) et lesquelles saisissent par le dessous les extrémités inférieures (20) des deux tronçons de bras (17a, 17b) avec leur mentonnet dans la position de travail, et en ce que le pied de transport par le dessus (15) est maintenu dans la position de repos et de travail par un ressort (31).
  9. Dispositif de transport par le dessus selon l'une des revendications 1 à 8, caractérisé en ce que la semelle de pied de transport (29) est fixée de manière amovible sur le pied de transport par le dessus (15).
  10. Dispositif de transport par le dessus selon l'une des revendications 1 à 9, caractérisé en ce que le tronçon de bras de levier (16a) du pied de transport par le dessus (15), se trouvant sur le bas, avec la semelle fixée dessus (25), est fixé de manière amovible dans la région du point de liaison (14) des deux tronçons de bras de levier (16a, 16b).
EP05405634A 2005-01-12 2005-11-15 Dispositif de transport par dessus pour machines à coudre Expired - Lifetime EP1681380B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH362005 2005-01-12

Publications (2)

Publication Number Publication Date
EP1681380A1 EP1681380A1 (fr) 2006-07-19
EP1681380B1 true EP1681380B1 (fr) 2007-09-26

Family

ID=35789188

Family Applications (1)

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EP05405634A Expired - Lifetime EP1681380B1 (fr) 2005-01-12 2005-11-15 Dispositif de transport par dessus pour machines à coudre

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US (1) US7055445B1 (fr)
EP (1) EP1681380B1 (fr)
DE (1) DE502005001570D1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7137329B2 (ja) * 2018-03-20 2022-09-14 Juki株式会社 ミシン
CN109355815B (zh) * 2018-12-20 2021-05-07 安徽杰羽制鞋机械科技有限公司 一种厚料机的同步送料机构
TWI893767B (zh) * 2024-04-17 2025-08-11 高林股份有限公司 縫紉機之送具下沉裝置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3437062A (en) * 1966-10-11 1969-04-08 Singer Co Mechanism for automatically adjusting the height of a top feed foot
DE6924107U (de) 1969-06-16 1969-10-09 Pfaff Ag G M Naehmaschine mit einer obertransportvorrichtung
DE6926302U (de) 1969-07-02 1969-11-27 Pfaff Ag G M Obertransportvorrichtung an naehmaschinen
JPS545139Y2 (fr) * 1971-06-19 1979-03-06
DE2352731C2 (de) * 1973-10-20 1975-12-04 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Nähmaschine mit Stoffschieberantrieb
DE8101552U1 (de) 1981-01-23 1981-07-30 Pfaff Haushaltsmaschinen GmbH, 7500 Karlsruhe Obertransportvorrichtung an einer naehmaschine
DE3435633C1 (de) 1984-09-28 1985-06-20 Dorina Nähmaschinen GmbH, 7500 Karlsruhe Obertransporteinrichtung an Naehmaschinen
DE8428570U1 (de) 1984-09-28 1986-03-06 Dorina Nähmaschinen GmbH, 7500 Karlsruhe Obertransporteinrichtung an Nähmaschinen
JPH05153Y2 (fr) * 1986-06-06 1993-01-05
DE3724788A1 (de) * 1987-07-27 1989-02-16 Pfaff Ind Masch Obertransporteinrichtung an naehmaschinen

Also Published As

Publication number Publication date
US7055445B1 (en) 2006-06-06
DE502005001570D1 (de) 2007-11-08
EP1681380A1 (fr) 2006-07-19

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