EP0123036B1 - Verfahren und Vorrichtung zum Steuern des Stoffschiebers einer Nähmaschine - Google Patents

Verfahren und Vorrichtung zum Steuern des Stoffschiebers einer Nähmaschine Download PDF

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Publication number
EP0123036B1
EP0123036B1 EP84101559A EP84101559A EP0123036B1 EP 0123036 B1 EP0123036 B1 EP 0123036B1 EP 84101559 A EP84101559 A EP 84101559A EP 84101559 A EP84101559 A EP 84101559A EP 0123036 B1 EP0123036 B1 EP 0123036B1
Authority
EP
European Patent Office
Prior art keywords
presser
coupling
lever
cloth feeder
slider
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
EP84101559A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0123036A1 (de
Inventor
Peter Vogel
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
Publication of EP0123036A1 publication Critical patent/EP0123036A1/de
Application granted granted Critical
Publication of EP0123036B1 publication Critical patent/EP0123036B1/de
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B27/00—Work-feeding means
    • D05B27/24—Feed-dog lifting and lowering devices

Definitions

  • the invention relates to a method and a device for controlling the fabric pusher of a sewing machine.
  • the cloth pusher of conventional sewing machines is given an approximately rectangular movement during the sewing process, i.e. it is raised from a lower, ineffective position beyond the throat plate, moved forward in the direction of the material feed, then lowered under the throat plate and finally moved back to the starting position.
  • the needle and the fabric pusher movement run synchronously in such a way that the material is fed when the needle is in the uppermost region of its upward movement; the fabric slide thus protrudes beyond the work surface when the needle is raised. Since certain tasks, e.g. for darning, embroidering and the like.
  • the material slide effect is undesirable, height-adjustable stitch plates or cover plates have already been proposed, which ensure that the material slide remains ineffective even in its raised working position below the working level.
  • the method according to the invention avoids these disadvantages in that the material slide is automatically moved into its lowered position when the material presser is raised by means of the control element assigned to it and is released again for the lifting movement when the material presser is lowered; it is sufficient to operate a single control element for the simultaneous release of the work surface from both the presser and the pushing device.
  • the device for carrying out this method which also forms part of the invention, has connecting means between the presser lifting device and a coupling device for the material slide lifting mechanism, which connecting devices, when the ventilation device is actuated in the sense of lifting the presser, simultaneously actuate the coupling device in order to lift the material pushing device from its drive part uncouple so that the slider loaded in the sense of the lowering is lowered.
  • This design ensures that when the fabric presser is raised by means of the ventilation device, the fabric slide is automatically lowered at the same time, and conversely, when the fabric presser is lowered by means of the ventilation device, the coupling device is brought back into readiness to couple the lifting mechanism of the fabric slide with its drive part .
  • a device has proven to be particularly expedient, the coupling device of which apart from e.g. knee-operated control element of the ventilation device can also be operated by a separate manual control element, which does not influence the ventilation device, for switching the lifting mechanism of the fabric slide on and off, while of course the manual control device for sewing machines, which is used to directly raise and lower the fabric presser, naturally also does not affect the coupling device.
  • Fig. 1 is the usual stator shaft of the sewing machine, which drives the pushing device 2 for the horizontal advancement and retraction of the fabric pusher 3 by means of an eccentric and a linkage.
  • the drive shaft 5 carrying a cam plate 4 can also be driven for the lifting device 6 for vertical lifting of the fabric slide 3.
  • the cam plate 4 is tapped from an arm 7a of an angle lever 7 pivotably mounted about a vertical axis; the other bell crank arm 7b forms a fork, in which engages the one arm 8a of a two-armed rocker arm 8 of a coupling device 10 which is pivotably mounted on a shaft 9 of the lifting device 6.
  • a coupling pin 12 is mounted axially displaceably in a bore parallel to the shaft 9 of a coupling head 11 fixed on this shaft 9.
  • the one, conical end of this coupling bolt 12 is intended to cooperate with a corresponding recess in the other arm 8b of the rocking lever 8, while at the other end of the bolt a spring 13 is supported, which is supported at the other end on a tab 10 seated on the shaft 9.
  • the support arm 15a of a slide 15 parallel to the bolt 12 also projects radially from the bolt.
  • This slide 15 has two double-arm crosspieces 15b.
  • the crossbar arms projecting on one slide side are guided in the longitudinal slot of a first link 16 which is articulated on a pivot lever 17.
  • This swivel lever 17 is non-rotatably on a transversely to the shaft 9 through the machine stand (not shown), rotatably mounted actuating shaft 18 for the ventilation device 19.
  • the actuating shaft 18 is provided with a knee-operated operating lever 20, by means of which the Ventilation device 19 in a known manner, the presser 21 can be raised or lowered.
  • the fabric presser 21 can also be raised or lowered directly by means of the hand lever 22 usually provided on the sewing machine.
  • transverse web arms projecting on the other slide side are guided in an analogous manner in the longitudinal slot of a second link 23, which in turn is connected via a link 24 to an actuating axis 25 mounted at the front in the machine housing, which is provided with a rotary knob 26.
  • the lifting device 6 for the fabric pusher 3 can be engaged or disengaged via the coupling device 10, specifically, as described in more detail below, via the actuation axis 18 for the fabric presser ventilation device 19 as well as the actuating axis 25 which serves for the separate manual lowering of the fabric slide.
  • FIG. 2 shows the coupling device with its various connections according to FIG. 1 in the engaged position.
  • the spring 13 holds the bolt 12 in engagement with the corresponding recess in the arm 8b of the rocker arm 8.
  • This rocker arm 8, which is freely pivotably mounted on the shaft 9, is brought into a reciprocating motion by the cam plate 4 via the angle lever 7 when the shaft 5 is driven ; the coupling pin 12 transmits this oscillating movement to the coupling head 11, which in turn sets the shaft 9 of the lifting device 6 in a corresponding torsional vibration.
  • This torsional vibration causes a lifting movement of the fabric slide 3 via the swivel arm indicated at 9a in FIG. 1 and engaging under the fabric slide 3, which is expediently lowered again with the aid of a spring 9b as shown in FIG. 1 when the swivel arm 9a is pivoted downward.
  • the pivoting of the actuating lever 20 has raised the material presser 21 by correspondingly rotating the actuating shaft 18 via the ventilation device 19.
  • the sewing point on the stitch plate of the sewing machine is thus exposed by a single actuation movement of the lever 20 and the material to be sewn can be moved freely without obstruction by the fabric pusher.
  • the fabric presser 21 can also be raised directly and without influencing the lifting device of the fabric pusher 3 by means of the hand lever 22. Thanks to the free travel provided in the transmission linkage at 27, a limited pushing up of the fabric presser 21 by the sewing material does not act on the ventilation device 19, so that this cannot result in the lifting device 6 being uncoupled from its drive.
  • the oscillating connection between the oscillating lever 8 and the shaft 9 can also be made by means of the rotary knob 26 Interrupt without affecting the presser. If the knob 26 (Fig. 2) is turned counterclockwise to a stop, not shown, for example for the lever arm 24, the handlebar 23 pushes the slider 15, and thus the coupling pin 12, into the longitudinal arm which engages in its longitudinal slot Disengagement position.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP84101559A 1983-03-23 1984-02-15 Verfahren und Vorrichtung zum Steuern des Stoffschiebers einer Nähmaschine Expired EP0123036B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1574/83 1983-03-23
CH1574/83A CH658268A5 (de) 1983-03-23 1983-03-23 Verfahren und vorrichtung zum steuern des stoffschiebers einer naehmaschine.

Publications (2)

Publication Number Publication Date
EP0123036A1 EP0123036A1 (de) 1984-10-31
EP0123036B1 true EP0123036B1 (de) 1986-09-03

Family

ID=4213602

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84101559A Expired EP0123036B1 (de) 1983-03-23 1984-02-15 Verfahren und Vorrichtung zum Steuern des Stoffschiebers einer Nähmaschine

Country Status (6)

Country Link
US (1) US4567838A (ja)
EP (1) EP0123036B1 (ja)
JP (2) JPS59174188A (ja)
AU (1) AU558206B2 (ja)
CH (1) CH658268A5 (ja)
DE (1) DE3460585D1 (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6073479U (ja) * 1983-10-26 1985-05-23 蛇の目ミシン工業株式会社 ミシンにおける送り微調節装置
CN86107973B (zh) * 1985-12-03 1988-08-03 三菱电机株式会社 缝纫机控制装置
US5195959A (en) * 1991-05-31 1993-03-23 Paul C. Smith Electrosurgical device with suction and irrigation
SE468898B (sv) * 1991-08-09 1993-04-05 Husqvarna Sewing Machines Anordning i sicksacksymaskin
US6554086B1 (en) * 2000-10-27 2003-04-29 Invacare Corporation Obstacle traversing wheelchair
JP4478991B2 (ja) * 2008-02-15 2010-06-09 ヤマトミシン製造株式会社 ミシンの押え揚げ装置
CN109518367B (zh) * 2017-09-18 2023-08-22 浙江中捷缝纫科技有限公司 送料机构及具有其的缝纫机
US10801143B2 (en) * 2017-12-01 2020-10-13 Hsien-Chang Tseng Knee operated lifting mechanism for a presser foot of a sewing machine
CN112048836B (zh) * 2019-06-05 2022-03-15 杰克科技股份有限公司 一种缝纫机
CN113005648B (zh) * 2019-12-19 2022-08-30 杰克科技股份有限公司 一种缝纫机
CN214142797U (zh) * 2020-08-27 2021-09-07 杰克缝纫机股份有限公司 联动调节机构及具有其的缝纫机

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE179615C (ja) * 1905-09-01
US2355189A (en) * 1941-08-12 1944-08-08 Pneumatic Scale Corp Feeding mechanism for sewing machine heads
US2420697A (en) * 1945-06-18 1947-05-20 Nat Sewing Machine Co Sewing machine
US2682242A (en) * 1951-04-24 1954-06-29 Singer Mfg Co Feeding mechanism for sewing machines
US2718202A (en) * 1953-06-09 1955-09-20 Singer Mfg Co Feed throw-out mechanisms for sewing machines
US3353511A (en) * 1966-02-07 1967-11-21 Singer Co Operator assist device for sewing machines or the like
US3611961A (en) * 1970-06-09 1971-10-12 Farah Mfg Co Inc Automatic welting patch and liner assembler and sewing device therefor
CH526666A (fr) * 1971-03-11 1972-08-15 Mefina Sa Machine à coudre
US3777686A (en) * 1972-06-30 1973-12-11 Singer Co Linear action knee lifters
US4426947A (en) * 1979-10-15 1984-01-24 Marshall Eric J Sewing machines

Also Published As

Publication number Publication date
AU2602584A (en) 1984-09-27
JPS6234536Y2 (ja) 1987-09-03
EP0123036A1 (de) 1984-10-31
US4567838A (en) 1986-02-04
CH658268A5 (de) 1986-10-31
JPS6276977U (ja) 1987-05-16
JPS59174188A (ja) 1984-10-02
AU558206B2 (en) 1987-01-22
DE3460585D1 (en) 1986-10-09

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