EP0433477A1 - Dispositif de surjetage bidirectionnel - Google Patents

Dispositif de surjetage bidirectionnel Download PDF

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Publication number
EP0433477A1
EP0433477A1 EP89123499A EP89123499A EP0433477A1 EP 0433477 A1 EP0433477 A1 EP 0433477A1 EP 89123499 A EP89123499 A EP 89123499A EP 89123499 A EP89123499 A EP 89123499A EP 0433477 A1 EP0433477 A1 EP 0433477A1
Authority
EP
European Patent Office
Prior art keywords
sewing
tongue
machine according
sewing machine
chain
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.)
Granted
Application number
EP89123499A
Other languages
German (de)
English (en)
Other versions
EP0433477B1 (fr
Inventor
Helmut Schips
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.)
Schips AG Nahautomationen
Schips AG Naehautomation
Original Assignee
Schips AG Nahautomationen
Schips AG Naehautomation
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
Priority to AT89123499T priority Critical patent/ATE102267T1/de
Application filed by Schips AG Nahautomationen, Schips AG Naehautomation filed Critical Schips AG Nahautomationen
Priority to ES89123499T priority patent/ES2050774T3/es
Priority to DE89123499T priority patent/DE58907138D1/de
Priority to EP89123499A priority patent/EP0433477B1/fr
Priority to BR909006453A priority patent/BR9006453A/pt
Priority to US07/628,907 priority patent/US5154129A/en
Priority to JP2403678A priority patent/JP2637848B2/ja
Publication of EP0433477A1 publication Critical patent/EP0433477A1/fr
Application granted granted Critical
Publication of EP0433477B1 publication Critical patent/EP0433477B1/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
    • D05B1/00—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both
    • D05B1/08—General types of sewing apparatus or machines without mechanism for lateral movement of the needle or the work or both for making multi-thread seams
    • D05B1/18—Seams for protecting or securing edges
    • D05B1/20—Overedge seams

Definitions

  • the invention relates to an automatic sewing machine for sewing chain seams according to the preamble of claim 1.
  • a stitch tongue for forward sewing is firmly integrated in the stitch plate, which points in the direction of sewing and enables the formation of the loop loops.
  • the sewing material is transported using various generally known and known transport devices.
  • the edges of the upper and lower material are flush with an edge cutter cut.
  • a lower knife of the edge cutting device is fixed to the machine.
  • An upper knife moves in time with the machine needle.
  • a chain puller sucks in the chain cut from the last piece with air and holds it in place. At the start of sewing, the chain held in this way is sewn into the newly produced seam and the beginning of the seam is thus cleaned.
  • the invention has for its object to provide a sewing machine for sewing chain seams of the type mentioned, in which reverse sewing is also possible.
  • the link tongue is not, as was customary in the past, fixed to the needle plate, but rather becomes a movable link integrated in the needle plate tongue carrier used with two chain tongues, so that it is possible to use one chain tongue for forward sewing and one for reverse sewing. With a suitably trained transport device and thread guide, sewing can now be done both in the forward direction and in the reverse direction.
  • the seam can be locked by starting to sew backwards at some distance from the edge of the material, and then switching to forward sewing when the edge of the material is reached. This means that the aforementioned chain puller is no longer absolutely necessary.
  • a small piece is then sewn backwards at the end. You can also start at the edge of the material, first forward approx. 10-15 mm, then backwards to the edge of the material and then forward again to the other edge of the material, where sewing is again carried out by 10-15 mm backwards.
  • An auxiliary chain tongue is arranged above the stitch plate as a thread guide when sewing in reverse.
  • One embodiment of the invention provides a linearly adjustable tongue support in the throat plate, this tongue support having two facing, contains, for example, chain tongues lying on a line, the tips of which are arranged at a predetermined distance from one another, and these tips can optionally be positioned at the level of the throat plate recess.
  • the throat plate holds a disk-shaped tongue support which can be rotated in a defined angular range about an axis of rotation perpendicular to the throat plate plane.
  • This disk-shaped tongue carrier carries in its peripheral region the two chain tongues with mutually facing tips, which are each in an end position of the said angular region in a position for forward or backward sewing.
  • the tongue carrier is adjusted with the aid of an adjusting mechanism which, with the aid of a linkage, moves a toothed segment which is in direct or indirect engagement with a toothing on the tongue carrier.
  • the two working positions of the link tongues are defined by stops of the adjustment mechanism.
  • Another embodiment provides for the tongue support to be driven directly via a shaft by a pneumatic rotary drive or a rotary magnet and to be rotated through a precisely defined angle of rotation.
  • the sewing material transport device plays a special role in the sewing machine according to the invention.
  • One embodiment of the invention provides for the sewing material transport device, a linear pliers transport that is independent of the machine. With this mode of transport, the sewing material is between the lower and the pinched upper part of the pliers.
  • the lower and upper part of the pliers are attached to a support, which is mounted on a shaft via ball guides.
  • the material is now transported by a DC motor, which linearly shifts the support with the lower and the upper pliers part and the material clamped in it via a toothed belt.
  • the lower part of the pliers is mounted in the guide of the throat plate, the upper part of the pliers is raised and lowered by means of a pneumatic cylinder.
  • the switch from forward to backward sewing takes place via the machine control, as does the lifting and lowering of the movable upper part of the pliers, with which the material is clamped.
  • a needle plate 2 can be attached to a machine housing of an automatic sewing machine by means of two screw holes 4 and 6 in the area of the material support be attached.
  • the needle plate 2 has a recess 8, in the area of which the sewing needle comes below the level of the needle plate.
  • the throat plate 2 has a guide track 16, in which a tongue support 10 is arranged so as to be linearly movable.
  • the tongue carrier 10 has a (in FIGS. 1a and 1b pointing upwards) chain tongue 12 for forward sewing and an oppositely directed chain tongue 16 for reverse sewing.
  • the chain tongue 12 is in the region of the recess 8 of the needle plate 2. In this position, the chain tongue 12 is used to form loop loops when sewing forward.
  • the tongue carrier 10 is moved into the position shown in FIG. 1b.
  • FIGS. 2a and 2b show another embodiment of the invention, which also makes it possible to produce chain seams by forward sewing and reverse sewing.
  • a throat plate 22 (FIG. 2a) contains screw holes 24 and 26 for attachment to the machine housing of the automatic sewing machine and, like the embodiment according to FIGS. 1a and 1b, has a recess 28 through which the needle runs downwards when sewing perpendicular to the plane of the drawing .
  • a tongue carrier 30, which is of disc-shaped design here, contains in its circumferential region a chain tongue 32 for forward sewing and a chain tongue 34 for reverse sewing, the tips of which have a similar distance from one another as the chain tongues 12 and 14 in the first exemplary embodiment.
  • the tongue support 30 is recessed into the throat plate 22, for which purpose the throat plate 22 has a circular recess 64, the diameter of which is slightly larger than the diameter of the tongue support 30.
  • the top of the tongue support 30 is slightly lower than the top of a guide track 36, the purpose of which will be explained further below.
  • the tongue support 30 is rotatably mounted on an axis of rotation 38.
  • the tongue carrier 30 has a toothing in the form of a partial ring gear 40 on a peripheral section.
  • the toothing 40 meshes with an intermediate gearwheel 42, which in turn is in engagement with a toothed segment 44 which is rotatably mounted on a holding plate 48 by means of an axis of rotation 46.
  • the toothed segment 44 is rigidly coupled to a pivot lever 50 on the underside of the holding plate 48.
  • a pivot lever 50 At the end of the pivot lever 50 facing away from the axis of rotation 46, the end of a toggle lever 52 is articulated.
  • the axis of rotation 57 between the pivot lever 50 and the toggle lever 52 forms a stop element 57.
  • the tongue carrier 30 is in a position for sewing forward a chain seam, the chain tongue 32 pointing for forward sewing in the transport direction of the sewing material.
  • the sewing material transport device here consists of a pliers conveyor, which comprises lower pliers 60 and upper pliers 62, the end regions of which are shown at the top in FIG. 2a.
  • the sewing material is clamped between the lower pliers 60 and the upper pliers 62 and transported in the direction of the arrow.
  • the lower pliers 60 run through the guide track 36 in the area of the throat plate 22, and then in a guide 58 of the sewing material support.
  • the upper pliers 62 are e.g. actuated by a pneumatically operated cylinder and pressed by this in the direction of the lower pliers 60 in order to clamp the sewing material.
  • the toggle lever 52 assumes a stable position and holds the latter via the pivoting lever 52, the toothed segment 44, the intermediate toothed wheel 42 and the toothing 40 on the tongue support 30 and consequently the chain tongue 32 formed therefor for forward sewing in a defined position for forward sewing.
  • the toggle lever 52 rests on a stop 54.
  • the machine control is set to reverse operation or triggered automatically by a sensor.
  • the toggle lever 52 is moved obliquely upward in the arrow direction by a pneumatic cylinder 65 in FIG. 2b, with the result that the toothed segment 44 is pivoted downward (arrow) in FIG. 2b via the pivoting lever 50.
  • the toothed segment 44 reaches a defined end position when the extension of the axis of rotation, which serves as a stop element 57, between the pivot lever 50 and the toggle lever 52 strikes a stop 56 which is fastened to the holding plate 48.
  • the tong feeder 60, 62 is not shown in the drawing.
  • the two pliers 60 and 62 are linear parts, they are moved by a common drive, for example by a DC motor via toothed belts on ball guides. This pliers transport, the lower pliers of which are guided in the throat plate, allows extremely clean Seam tracking. The beginning and end of the seam can be easily locked with a piece of reverse-stitched seam or a piece of additional forward and reverse seams.
  • the tong feeder is naturally only suitable for transport routes within certain limits.
  • an upper transport integrated in the machine base is provided according to the invention.
  • Such an upper transport is known per se. Here it is only used for transport when sewing forward. When sewing in reverse, the top feed is switched off and the tong feeder is used instead.
  • edge cutting device by means of which the edges of the upper and lower material to be sewn are cut flush.
  • the edge cutting device comprises a lower knife and an upper knife which is moved synchronously with the cycle of the sewing needle.
  • only the lower knife in the automatic sewing machine is not fixed immovably on the machine, but is retractably mounted. This is important when sewing in reverse; because then - automatically initiated by the machine control - the lower knife is pulled back by a pneumatic cylinder in order to prevent the seam which has been made up to that point from being destroyed by the edge cutting device when sewing backwards.
  • a foldable tongue rotator can be used instead of the linearly adjustable tongue rotator or the rotatable tongue rotator be present, which either brings the tongue for forward sewing or the tongue for reverse sewing into the required working position.
  • auxiliary chain tongue arranged above the stitch plate, which serves as a stitch formation element when sewing in reverse.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP89123499A 1989-12-19 1989-12-19 Dispositif de surjetage bidirectionnel Expired - Lifetime EP0433477B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
ES89123499T ES2050774T3 (es) 1989-12-19 1989-12-19 Automata para coser costuras de remallar.
DE89123499T DE58907138D1 (de) 1989-12-19 1989-12-19 Nähautomat zum Nähen von Kettelnähten.
EP89123499A EP0433477B1 (fr) 1989-12-19 1989-12-19 Dispositif de surjetage bidirectionnel
AT89123499T ATE102267T1 (de) 1989-12-19 1989-12-19 Naehautomat zum naehen von kettelnaehten.
BR909006453A BR9006453A (pt) 1989-12-19 1990-12-18 Maquina de costura automatica para fazer costuras em ponto de cadeira
US07/628,907 US5154129A (en) 1989-12-19 1990-12-18 Automatic sewing machine for sewing chain stitch seams
JP2403678A JP2637848B2 (ja) 1989-12-19 1990-12-19 環縫いの縫合せ用自動ミシン

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP89123499A EP0433477B1 (fr) 1989-12-19 1989-12-19 Dispositif de surjetage bidirectionnel

Publications (2)

Publication Number Publication Date
EP0433477A1 true EP0433477A1 (fr) 1991-06-26
EP0433477B1 EP0433477B1 (fr) 1994-03-02

Family

ID=8202251

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89123499A Expired - Lifetime EP0433477B1 (fr) 1989-12-19 1989-12-19 Dispositif de surjetage bidirectionnel

Country Status (7)

Country Link
US (1) US5154129A (fr)
EP (1) EP0433477B1 (fr)
JP (1) JP2637848B2 (fr)
AT (1) ATE102267T1 (fr)
BR (1) BR9006453A (fr)
DE (1) DE58907138D1 (fr)
ES (1) ES2050774T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3396235B2 (ja) * 1992-04-28 2003-04-14 ペガサスミシン製造株式会社 二本針三本糸のミシンによる空環引出方法及び装置
JPH06233878A (ja) * 1993-02-08 1994-08-23 Brother Ind Ltd ロックミシン
CN108914398B (zh) * 2018-09-29 2024-01-30 广东金悦来自动化设备有限公司 一种鞋舌织带自动缝纫设备
US11008687B2 (en) * 2019-04-24 2021-05-18 Hsien-Chang Tseng Positioning device for an ally movable tongue seat

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100469A (en) * 1961-09-06 1963-08-13 Merrow Machine Co Throat plate for overedge sewing machine
DE1933678A1 (de) * 1969-07-03 1971-01-21 Union Special Machine Co Stichplatte mit verschiebbarer Stichbildezunge
EP0037444A1 (fr) * 1980-03-14 1981-10-14 Pegasus Sewing Machine Mfg. Co., Ltd. Méthode et dispositif pour l'exécution de chainettes de liaison sur machines à surjeter à deux aiguilles
US4644884A (en) * 1983-07-28 1987-02-24 Pegasus Sewing Maching Mfg. Co., Ltd. Thread chain sewing apparatus for use in overedge sewing machine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3257979A (en) * 1964-05-05 1966-06-28 Michaud Robert Henry Trimming and material folding device for overlock sewing machine
US3358631A (en) * 1965-06-21 1967-12-19 Union Special Machine Co Projectable and retractable stitch tongue equipped, zig-zag sewing machine
DE2825530C2 (de) * 1978-06-10 1987-05-07 Pfaff Industriemaschinen Gmbh, 6750 Kaiserslautern Nähmaschine mit einem Führungszapfen für einen Nähgutträger
JPS5637444A (en) * 1979-09-04 1981-04-11 Toshiba Corp Humidity information reading in circuit for humidity control device
IT1168499B (it) * 1981-12-18 1987-05-20 Necchi Spa Placca ago a due posizioni per macchine per cucire
US4546716A (en) * 1984-07-30 1985-10-15 Porter Sewing Machines, Inc. Double overlock seamer
US4969409A (en) * 1989-02-02 1990-11-13 Pagasus Sewing Machine Mfg. Co., Ltd. Needle plate having recess for accommodating looper thread

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100469A (en) * 1961-09-06 1963-08-13 Merrow Machine Co Throat plate for overedge sewing machine
DE1933678A1 (de) * 1969-07-03 1971-01-21 Union Special Machine Co Stichplatte mit verschiebbarer Stichbildezunge
EP0037444A1 (fr) * 1980-03-14 1981-10-14 Pegasus Sewing Machine Mfg. Co., Ltd. Méthode et dispositif pour l'exécution de chainettes de liaison sur machines à surjeter à deux aiguilles
US4644884A (en) * 1983-07-28 1987-02-24 Pegasus Sewing Maching Mfg. Co., Ltd. Thread chain sewing apparatus for use in overedge sewing machine

Also Published As

Publication number Publication date
ATE102267T1 (de) 1994-03-15
DE58907138D1 (de) 1994-04-07
EP0433477B1 (fr) 1994-03-02
JP2637848B2 (ja) 1997-08-06
ES2050774T3 (es) 1994-06-01
BR9006453A (pt) 1991-10-01
JPH06218167A (ja) 1994-08-09
US5154129A (en) 1992-10-13

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