EP0106795B1 - Accessoire pour machine à coudre - Google Patents

Accessoire pour machine à coudre Download PDF

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Publication number
EP0106795B1
EP0106795B1 EP83810343A EP83810343A EP0106795B1 EP 0106795 B1 EP0106795 B1 EP 0106795B1 EP 83810343 A EP83810343 A EP 83810343A EP 83810343 A EP83810343 A EP 83810343A EP 0106795 B1 EP0106795 B1 EP 0106795B1
Authority
EP
European Patent Office
Prior art keywords
blade
sewing machine
support
cutting
knife
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
EP83810343A
Other languages
German (de)
English (en)
Other versions
EP0106795A1 (fr
Inventor
Ernst Dreier
Jakob Rickenbach
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.)
Fritz Gegauf AG
Original Assignee
Fritz Gegauf 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 Fritz Gegauf AG filed Critical Fritz Gegauf AG
Priority to AT83810343T priority Critical patent/ATE20095T1/de
Publication of EP0106795A1 publication Critical patent/EP0106795A1/fr
Application granted granted Critical
Publication of EP0106795B1 publication Critical patent/EP0106795B1/fr
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B37/00—Devices incorporated in sewing machines for slitting, grooving, or cutting
    • D05B37/04—Cutting devices
    • D05B37/06—Cutting devices with oscillating tools
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B37/00—Devices incorporated in sewing machines for slitting, grooving, or cutting
    • D05B37/04—Cutting devices
    • D05B37/06—Cutting devices with oscillating tools
    • D05B37/063—Cutting devices with oscillating tools in synchronism with the movement of the needle bar or the work-feeding means

Definitions

  • the invention relates to an additional device for a sewing machine for trimming material edges with a fixed and a movable knife that can be driven by the needle bar of the machine and works in a scissor-like manner with the fixed knife.
  • Such additional devices which can be attached to sewing machines of all types, for trimming the material edge running against the sewing point are known in various designs.
  • the knife which is driven by the needle bar and moves essentially vertically, interacts with a counter knife fixedly connected to a part of the machine.
  • the movable knife is either attached directly to the needle bar or to a knife holder attached to the working surface of the machine (I-PS 603 617).
  • a suitably designed edge of the throat plate, a cutting edge attached to this or a counter knife carried by the additional device serves as the fixed counter knife.
  • the known additional devices are either cumbersome to handle by replacing parts of the sewing machine, or adjustment work is required to ensure the exact interaction of the two knives.
  • the presser foot must be replaced with the cutting device.
  • the direct attachment of the additional device to the presser bar has the disadvantage that the device is raised together with the presser when sewing and cutting thick material, so that the supply of sewing material and the simultaneous sewing of the material edge are at least made very difficult, if not impossible.
  • the axis of the movable knife lies directly at the cutting point and hinders the removal of the separated material.
  • Another disadvantage of the additional device mentioned is the transmission of motion over several joints, which in addition to complex production also leads to undesired wear, play and noise.
  • the immediate vicinity of the two knives should not have any elements that inhibit the flow of material and the passage space for the separated material must be large enough and free of obstacles that could lead to material jam.
  • the force transmission between the drive element arranged on the needle bar and the movable knife should take place as directly as possible and not via intermediate elements.
  • the present invention aims to provide an additional device for cutting material edges on a sewing machine, which does not have the disadvantages of the known devices of this type.
  • the axial displacement of the knife carrier and its drive parts with respect to the cutting plane of the knives is particularly advantageous, thereby creating a free passage space for the separated material.
  • the U-shaped design of the movable knife with the knife arm bridging the passage space and the knife protruding downwards, which interacts with the flat counter knife, has the great advantage that the area surrounding the knife remains free both laterally and in height, and the material flow can be done freely.
  • the free passage space should preferably be about 20 mm on the side and at least 8 mm high so that all materials that can usually be processed on a household sewing machine can be cut without any problems.
  • the movable knife is driven from the drive member of the needle bar, which is usually part of the needle holder, via a single intermediate member containing the control curve for the knife directly onto the knife carrier.
  • the knife carrier is axially movable to a small extent and is pressed together with the knife under spring pressure against the fixed counter knife. As a result, the two cutting edges are always close to one another, which leads to a self-grinding effect of the knives during operation.
  • an articulated lever mechanism 4 consisting of a drive fork 5, a drive cam carrier 6 and a knife carrier 7, is provided on a device carrier 1 with a base plate 2 and an attachment 3, an articulated lever mechanism 4, consisting of a drive fork 5, a drive cam carrier 6 and a knife carrier 7, is provided on a device carrier 1 with a base plate 2 and an attachment 3, an articulated lever mechanism 4, consisting of a drive fork 5, a drive cam carrier 6 and a knife carrier 7, is provided on a device carrier 1 with a base plate 2 and an attachment 3, an articulated lever mechanism 4, consisting of a drive fork 5, a drive cam carrier 6 and a knife carrier 7, is provided on a device carrier 1 with a base plate 2 and an attachment 3, an articulated lever mechanism 4, consisting of a drive fork 5, a drive cam carrier 6 and a knife carrier 7, is provided on a device carrier 1 with a base plate 2 and an attachment 3, an articulated lever mechanism 4, consisting of a drive fork 5, a drive cam carrier 6 and a knife carrier 7, is provided
  • a U-shaped knife 17 with a cutting blade 16 projecting downward is provided on the knife carrier 7.
  • the knife 17 is preferably fastened to the knife carrier 7 with screws 18, 19.
  • One of the screws 18 or 19 can be designed as an eccentric in order to make the knife 17 adjustable relative to the knife carrier 7.
  • a spring 12 is provided, by means of which the cutting blade 16 rests resiliently against the cutting edge 20 of a fixed knife 21 provided on the base plate 2.
  • the knife 21 is designed as a flat part that protrudes laterally from the base plate 2 and is only a few millimeters high.
  • a knurled screw 22 which, together with a centering pin 23, serves to fix the base plate 2 of the device carrier 1 on the work surface 24 of a sewing machine.
  • a bolt 25 which is usually part of the needle holder and is arranged on the needle bar 27 of the machine, engages in the opening 10 of the fork 5.
  • the knife 17 is also raised via the pin 14 engaging in the curved path 15, i. H. the two knives 17 and 21 lie opposite each other at an (opening) angle a, the edges of the knives 17 and 21 crossing at point A on the side facing the needle 28 (FIGS. 1 and 3).
  • FIG. 1 a material web 30 to be processed is inserted into the opening cutout of the two knives 17, 21 and the sewing machine is started.
  • the needle 28 is lowered, the fork 5 and with it the cam carrier 6 are rotated about the axis 9.
  • the guide pin 14 rotates the knife holder 7 about the axis 11.
  • the cutting edge 20 of the knife 17 attached to the holder 7 slides past the edge 20 of the knife 21 and separates the one lying in the opening area of the knives 17 and 21 Material while the sewing tools stitch the edge seam (Fig. 2).
  • the needle 28 With the reversal of the movement of the needle bar 27, the needle 28 is pulled out of the material web 30 and the knife 17 is raised. As soon as the needle 28 is in its upper region, the fabric pusher, not shown, of the machine pushes the material web 30 under the fabric pusher 29 by a stitch length in the direction of arrow B. A new, yet untrimmed section of the material web 30 is thereby pushed into the working area of the two knives 17 and 21, which are now opened again via the articulated lever mechanism 4.
  • cam track 15 allows both the lateral sequence and the course of the cutting speed to be determined.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Massaging Devices (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Claims (4)

1. Accessoire pour machine à coudre, servant à rogner par les côtés les lisières du matériau cousu, accessoire comportant un couteau fixe et un couteau mobile, lequel peut être entraîné par la barre de l'aiguille, coopère à la manière de ciseaux avec le couteau fixe, et en liaison d'entraînement, par un système de leviers articulés, avec la vis de calage de l'aiguille sur sa barre, le couteau fixe et le couteau mobile formant ensemble un plan de coupe ; accessoire caractérisé en ce que le système de leviers articulés consiste en une came de commande (6), à fente de guidage courbe, présentant une fourche d'entraînement (5), et un porte-couteau (7) portant le couteau mobile (17) et en prise avec la came (6), celle-ci étant montée à pivotement sur un premier axe (9) et le porte-couteau (7) sur un deuxième axe de pivotement constitué par un boulon (11), chacun dans un plan différent, lesquels plans sont disposés à une certaine distance axiale du plan de coupe et en formant, pour la découpe du matériau, une ouverture de passage entre le plan de coupe des deux couteaux (17, 21) et les plans de pivotement de la came (6) et du porte-couteau (7).
2. Accessoire pour machine à coudre selon la revendication 1, caractérisé en ce que le couteau (17) est exécuté sous la forme d'un U, le premier côté portant la lame de coupe (16) étant maintenu, par une pièce de liaison, à une certaine distance du plan de pivotement du porte-couteau (7) constituant le deuxième côté.
3. Accessoire pour machine à coudre selon la revendication 1, caractérisé en ce que le couteau (17) est fixé de façon réglable au porte-couteau .(7).
4. Accessoire pour machine à coudre selon la revendication 1, caractérisé en ce que le couteau (17), avec le porte-couteau (7), est en appui élastique contre l'arête tranchante (20) du couteau fixe (21).
EP83810343A 1982-09-15 1983-07-29 Accessoire pour machine à coudre Expired EP0106795B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83810343T ATE20095T1 (de) 1982-09-15 1983-07-29 Zusatzvorrichtung fuer naehmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5453/82 1982-09-15
CH545382 1982-09-15

Publications (2)

Publication Number Publication Date
EP0106795A1 EP0106795A1 (fr) 1984-04-25
EP0106795B1 true EP0106795B1 (fr) 1986-05-28

Family

ID=4293847

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83810343A Expired EP0106795B1 (fr) 1982-09-15 1983-07-29 Accessoire pour machine à coudre

Country Status (9)

Country Link
US (1) US4463693A (fr)
EP (1) EP0106795B1 (fr)
JP (1) JPS5964095A (fr)
KR (1) KR860001538B1 (fr)
AT (1) ATE20095T1 (fr)
AU (1) AU556409B2 (fr)
DE (1) DE3363753D1 (fr)
NZ (1) NZ205211A (fr)
ZA (1) ZA836143B (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4625663A (en) * 1985-02-05 1986-12-02 Mikio Mori Work cutting attachment for zigzag sewing machines
DE10066310B4 (de) * 1999-12-16 2018-01-04 Juki Corp. Fadenschneider für eine Nähmaschine
US6408727B1 (en) 2000-01-12 2002-06-25 International Business Machines Corporation Paper cutter using a blade lifting mechanism
US6722413B1 (en) * 2000-10-26 2004-04-20 Sig Pack Doboy Inc. Cutting and laminating apparatus for producing reinforced web
JP4598818B2 (ja) * 2007-12-27 2010-12-15 株式会社アックスヤマザキ ミシン用カッター装置
JP2011245065A (ja) * 2010-05-27 2011-12-08 Tokai Ind Sewing Mach Co Ltd シークイン送り装置を備えたミシン
JP5804701B2 (ja) * 2010-12-28 2015-11-04 サトーホールディングス株式会社 用紙切断装置
CN103103700B (zh) * 2013-02-06 2015-05-20 中山百川汇盈精密实业有限公司 一种剪线切带装置
CN103361898A (zh) * 2013-07-30 2013-10-23 苏州巨康缝制机器人有限公司 一种缝合裁剪机构
CN103361897A (zh) * 2013-07-30 2013-10-23 苏州巨康缝制机器人有限公司 一种新型缝纫机
TWM533567U (en) * 2016-09-08 2016-12-11 Ming-Yu Lin Structure improvement of cutting machine
CN106592121A (zh) * 2017-01-18 2017-04-26 浙江飞凤缝制设备有限公司 一种缝纫机自动剪切机构
CN110878451B (zh) * 2019-12-06 2022-03-01 拓卡奔马机电科技有限公司 针板结构及缝纫机

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US947506A (en) * 1909-06-14 1910-01-25 Isidor Weinbach Combination pressure-foot and trimming attachment for sewing-machines.
US1997617A (en) * 1934-02-05 1935-04-16 Metropolitan Sewing Machine Co Trimming attachment for sewing machines
US2021700A (en) * 1935-06-22 1935-11-19 Pugach Barnet Edge shearing device for sewing machines
US2443369A (en) * 1946-03-13 1948-06-15 Alifano Antonio Edge cutter attachment for sewing machines
DE1003553B (de) * 1955-08-31 1957-02-28 Osvald Madsen Vorrichtung fuer Naehmaschinen od. dgl. zum Zickzackschneiden von Stoff
US3149590A (en) * 1962-01-02 1964-09-22 Sr Gilbert Fowler Sewing machine fabric trimming attachment
CH541650A (de) * 1971-08-27 1973-09-15 Marbacher Stephan Zusatzvorrichtung an Nähmaschinen zum Schneiden von Stoff, Leder, Kunstleder, Plastikfolie etc.
CH646475A5 (de) * 1980-06-30 1984-11-30 Gegauf Fritz Ag Zusatzvorrichtung an naehmaschine zum beschneiden von materialkanten.

Also Published As

Publication number Publication date
AU1807883A (en) 1984-03-22
KR840006028A (ko) 1984-11-21
JPS5964095A (ja) 1984-04-11
ATE20095T1 (de) 1986-06-15
ZA836143B (en) 1984-04-25
AU556409B2 (en) 1986-10-30
EP0106795A1 (fr) 1984-04-25
DE3363753D1 (en) 1986-07-03
KR860001538B1 (ko) 1986-10-02
US4463693A (en) 1984-08-07
NZ205211A (en) 1985-08-30

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