EP0319462A1 - Spulenkapsel mit einer einstellbaren Fadenspannvorrichtung - Google Patents

Spulenkapsel mit einer einstellbaren Fadenspannvorrichtung Download PDF

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Publication number
EP0319462A1
EP0319462A1 EP88810697A EP88810697A EP0319462A1 EP 0319462 A1 EP0319462 A1 EP 0319462A1 EP 88810697 A EP88810697 A EP 88810697A EP 88810697 A EP88810697 A EP 88810697A EP 0319462 A1 EP0319462 A1 EP 0319462A1
Authority
EP
European Patent Office
Prior art keywords
bobbin case
thread
brake disc
tension spring
thread tension
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.)
Withdrawn
Application number
EP88810697A
Other languages
German (de)
English (en)
French (fr)
Inventor
Ernst Dreier
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 EP0319462A1 publication Critical patent/EP0319462A1/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B57/00—Loop takers, e.g. loopers
    • D05B57/26—Bobbin holders or casings; Bobbin holder or case guards; Bobbin discharge devices
    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B63/00—Devices associated with the loop-taker thread, e.g. for tensioning

Definitions

  • the present invention relates to a bobbin case with an adjustable thread tensioning device according to the preamble of patent claim 1.
  • Thread tensioners on bobbin cases are known.
  • a bobbin case with an adjustable thread tension spring for sewing machines with an oscillating central bobbin hook is known, in which the thread is passed between the bobbin case surface and an arcuate spring lying above it.
  • the contact pressure of the spring on the thread can be adjusted using an adjusting screw.
  • the thread emerging from the bobbin case is clamped between the bobbin case surface and the underside of the spring and, depending on the tension of the spring, is more or less braked.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, solves the problem of creating a bobbin case with an adjustable thread tensioning device, in which the thread is clamped evenly throughout the braking area and there is always a constant thread tension, regardless of the thickness of the thread.
  • the thread can be clamped uniformly in the entire braking area.
  • the thread always runs through the braking area on a precisely defined path.
  • the brake voltage can be adjusted easily and reproducibly using an adjusting screw without additional straightening operations.
  • the bobbin case 1 formed in a conventional manner essentially consists of a cylindrical jacket 3 and a bobbin case base 5, in the center of which the bobbin mandrel 7 is placed.
  • the thread bobbin not shown, is stored with the bobbin of thread.
  • the bobbin case 3 there is a V-shaped incision 9 on the open side, which is connected to a thread outlet bore 11 via an angled threading slot 10. A relatively large recess 13 is let into the jacket 3 at a distance from the thread outlet bore 11.
  • a thread tension spring 19 having essentially the same curvature as the bobbin case surface 17 is attached by means of a screw 15 screwed into the jacket 3.
  • the thread tension spring 19 has a cup-shaped elevation 21 in the area of the thread exit bore 11, the base of which lies at a greater distance from the surface 17 of the bobbin case 1 than the other areas of the thread tension spring 19 (see also FIGS. 2-4).
  • a brake disc 23 is inserted between the surface 17 of the bobbin case 1 and the base of the elevation 21, the side of the brake disc facing the surface 17 is formed parallel to the surface 17.
  • the area of the brake disk 23 that runs parallel to the surface 17 forms the friction surface 25.
  • an indentation 45 is provided, which cooperates with a corresponding recess 46 in the brake disc 23 so that it cannot rotate about its axis A (cf. FIG. 5).
  • the surface 17 of the jacket 3 of the bobbin case 1 is in the loading rich of the braking or friction surface 25 is preferably flat.
  • the contact surface of the brake disk 23 is also flat.
  • the brake disc 23 has in the center of the braking or friction surface 25 a pin 27 which engages in a bore 29 in the casing 3 of the bobbin case 1 with play.
  • the two mutually facing friction surfaces of the jacket 3 and the brake disk 23 are preferably not directly on top of one another, but are held at a short distance by an elevation either in the brake disk 23 or in the jacket surface 17 or a hump 31.
  • the height h of the elevation 31 corresponds approximately to the average thickness of the threads or yarns 33 processed on the sewing machine, so that the brake disc 23 lies approximately parallel to the braking surface on the jacket 3 when the thread 33 is inserted.
  • the brake disc 23 cannot slip out of the cup-shaped elevation 21 when the thread tension spring 19 is released, it is loosely attached to the thread tension spring 19 by a rivet or screw 35 which penetrates the thread tension spring 19.
  • the brake disk 23 can also be attached to the thread tension spring 19 by spreading out a pin 37 penetrating the thread tension spring 19 (see FIG. 3).
  • the pin 37 can also be part of the brake disc 23.
  • a thread guide 39 can also be formed on the thread tension spring 19 or on a separate sheet metal part. This consists essentially of a U-shaped incision 41, the base of which lies above the recess 13, one leg extending beyond the edge of the recess 13 and the other leg ending within the recess 13 and vice versa is bow. The thread 33 can be passed between the bent end 43 and the edge of the recess 13.
  • the course of the thread 33 during the sewing process can be seen in FIG. 1: it runs from the inside of the bobbin case 1 of a bobbin, not shown for the sake of clarity, which is mounted on the bobbin mandrel 7, through the bore 11 into the friction or Braking surface 25 a. From there, the thread 33 passes around the pin 27 and at an obtuse angle to the bottom of the incision 41, from where it leaves the area of the bobbin case 1. The braking effect on the thread 33 takes place along the two straight sections in the friction area 25.
  • the thread 33 can be easily inserted into the thread tensioning device by being pulled through the V-shaped incision 9 and the threading slot 10 under the thread tension spring 19 and the brake disk 23. The thread 33 is then pulled around the pin 37 and passed under the end 43 of the thread guide 39.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP88810697A 1987-11-11 1988-10-11 Spulenkapsel mit einer einstellbaren Fadenspannvorrichtung Withdrawn EP0319462A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4404/87 1987-11-11
CH4404/87A CH673294A5 (enrdf_load_stackoverflow) 1987-11-11 1987-11-11

Publications (1)

Publication Number Publication Date
EP0319462A1 true EP0319462A1 (de) 1989-06-07

Family

ID=4275503

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88810697A Withdrawn EP0319462A1 (de) 1987-11-11 1988-10-11 Spulenkapsel mit einer einstellbaren Fadenspannvorrichtung

Country Status (4)

Country Link
US (1) US4884519A (enrdf_load_stackoverflow)
EP (1) EP0319462A1 (enrdf_load_stackoverflow)
JP (1) JPH01155895A (enrdf_load_stackoverflow)
CH (1) CH673294A5 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19510830A1 (de) * 1995-03-24 1996-09-26 Duerkopp Adler Ag Spulenbremse für die Greiferfaden-Spule einer Doppelsteppstich-Nähmaschine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100453606B1 (ko) * 1996-05-16 2005-05-13 쥬키 가부시키가이샤 재봉기의보빈케이스및밑실보빈
US6152057A (en) * 1999-07-26 2000-11-28 Bakron Corporation Bobbin assembly incorporating a thread tensioning assembly and method of controlling the payout of thread from a bobbin assembly
JP2002153014A (ja) * 2000-11-08 2002-05-24 Mitsubishi Electric Corp 整流子モータ
US6895879B1 (en) * 2003-10-29 2005-05-24 Ronald Kronenberger Bobbin case assembly with thread tensioning assembly
USD953010S1 (en) * 2018-12-04 2022-05-31 Cm Cerliani S.R.L. Bobbin case

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE166689C (enrdf_load_stackoverflow) * 1900-01-01
DE918547C (de) * 1951-08-17 1954-09-30 Georg Frohberg Doppelsteppstichnaehmaschine mit umlaufendem Greifer

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3381642A (en) * 1964-07-31 1968-05-07 Necchi Spa Bobbin case holder for sewing machines
CH435947A (de) * 1966-05-13 1967-05-15 Gegauf Fritz Ag Spulenkapsel mit regulierbarer Fadenspannfeder für Nähmaschinen mit oszillierendem Zentralspulgreifer
US3437284A (en) * 1967-02-13 1969-04-08 Advance Silk Thread Corp Smooth tension sewing machine bobbin case and bobbin
US3568616A (en) * 1969-10-02 1971-03-09 Singer Co Bobbin case for sewing machines
US4235178A (en) * 1979-03-26 1980-11-25 Union Special Corporation Bobbin thread tension device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE166689C (enrdf_load_stackoverflow) * 1900-01-01
DE918547C (de) * 1951-08-17 1954-09-30 Georg Frohberg Doppelsteppstichnaehmaschine mit umlaufendem Greifer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19510830A1 (de) * 1995-03-24 1996-09-26 Duerkopp Adler Ag Spulenbremse für die Greiferfaden-Spule einer Doppelsteppstich-Nähmaschine
DE19510830C2 (de) * 1995-03-24 2001-11-22 Duerkopp Adler Ag Spulenbremse für die Greiferfaden-Spule einer Doppelsteppstich-Nähmaschine

Also Published As

Publication number Publication date
US4884519A (en) 1989-12-05
CH673294A5 (enrdf_load_stackoverflow) 1990-02-28
JPH01155895A (ja) 1989-06-19

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