EP0200675A2 - Schlingenfänger mit umlaufendem Greifer für Nähmaschine - Google Patents

Schlingenfänger mit umlaufendem Greifer für Nähmaschine Download PDF

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Publication number
EP0200675A2
EP0200675A2 EP86810121A EP86810121A EP0200675A2 EP 0200675 A2 EP0200675 A2 EP 0200675A2 EP 86810121 A EP86810121 A EP 86810121A EP 86810121 A EP86810121 A EP 86810121A EP 0200675 A2 EP0200675 A2 EP 0200675A2
Authority
EP
European Patent Office
Prior art keywords
thread
notch
bobbin
capsule
shoe
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Withdrawn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
EP86810121A
Other languages
English (en)
French (fr)
Other versions
EP0200675A3 (de
Inventor
Olindo Baruffa
Antonio Jimenez
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.)
Mefina SA
Original Assignee
Mefina SA
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 Mefina SA filed Critical Mefina SA
Publication of EP0200675A2 publication Critical patent/EP0200675A2/de
Publication of EP0200675A3 publication Critical patent/EP0200675A3/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Withdrawn legal-status Critical Current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
    • D05B57/265—Bobbin holders or casings; Bobbin holder or case guards; Bobbin discharge devices for looptakers with vertical axis

Definitions

  • the invention aims to simplify the initial factory setting.
  • the arcuate part being on at least a portion of the periphery of the can.
  • the adjustment lever being pivoted on a support mounted in an adjustable manner on the arcuate part, means allowing the fixing on the capsule of the assembly formed by the arcuate part, the shoe, the elastic blade, the lever and the adjustable support.
  • the loop sensor comprises a frame 1 carrying a fixed pivot 2 on which a cup 3 is rotatably mounted.
  • the rotation drive of this cup is obtained by a drive shaft 4 carrying a wheel 5 with oblique teeth, which meshes with another wheel 6 with oblique teeth integral with the bowl 3.
  • the latter is retained on the pivot 2 by means of a screw 7 and a washer 8, which is combined with at least one permanent magnet 9.
  • the upper part of the bowl 3 comprises a hook 10 intended to engage in the loop of the needle thread of the sewing machine.
  • the upper annular portion of the rotary bowl consists of two metal rings 12 and 13 overlapped.
  • the rings 12 and 13 have a notch 14 cut out so as to be integrated into the hook 10.
  • the lower ring 13 is cut to form the beak 15 of the hook used to catch the upper thread and to bring it into the notch 14 to pass it around the bobbin.
  • the rings 12 and 13 are made integral with the bowl 3, for example using screws 16, and constitute the guide and support surfaces of a capsule 17.
  • This capsule has a bearing surface 18 which rests on the ring 13. The lateral guidance of this capsule is produced by the surface of the internal diameter of the ring 12, which laterally retains the bearing surface 18.
  • the capsule 17 contains the bobbin 32 on which the lower thread is wound.
  • the thread of this bobbin is subjected to predetermined braking to obtain a certain tension of the thread during sewing.
  • the mechanism for adjusting the tension of this thread is shown on a larger scale in FIGS. 3 and 4.
  • This mechanism is entirely carried by an arcuate piece 33 which extends over a portion of the periphery of the bobbin 32 and constitutes a part of the wall of the housing in which the bobbin is placed.
  • This arcuate part has a notch 34 for the passage of the bobbin thread 35.
  • a shoe 36 presses the wire 35 against the outer surface of the arcuate part 33 from the notch 34, so as to exert braking on this wire when it is unwound.
  • the shoe 36 is subjected to the elastic action of a leaf spring 37 which is kept pressed against the shoe by means of a lever 38 for holding and adjusting.
  • This lever 38 is pivotally mounted on a support 39 on which pivots a cam 40 which acts on the adjustment lever 38.
  • the adjustment support 39 and the lever 38 are both articulated on a bearing screw 41, the threaded part of which is screwed into a tab 42 forming part of the arcuate part 33.
  • the support 39 is adjustable and its position can be adjusted using an adjustment screw 43 cooperating with a threaded bore provided in the part 33.
  • the screw 41 has a threaded portion long enough to pass through a hole in the capsule 17 and engage in a nut, not shown, allowing the assembly formed by the arcuate part 33, the shoe 36, the elastic blade to be screwed onto the capsule 17.
  • 37, the lever 38 and the adjustable support 39 The adjustment of the pressure of the shoe 36 on the wire 35 is obtained by modifying the position of the lever 38 relative to the part 33.
  • This position of the lever 38 is determined, from on the one hand, by the position of the support 39 which is adjusted at the factory by acting on the screw 43 and, on the other hand, by an action on the cam 40, which can be carried out by the user, using a screwdriver which it engages in a slot 44 of this cam, while retaining the initial factory setting.
  • the end of the shoe 36 which is shown in broken lines, has two guide fingers 45 and 46 between which the wire 35 must pass. These fingers are slightly curved and partially penetrate into an opening 47 in the end of the arched part 33. This end also carries a finger 48 defining a notch 49 through which the wire 35 must pass.
  • the notch 34 is constituted by a slot extending obliquely as far as the shoe 36, the relative positions between the bottom of this slot and the notch 49 being chosen so that the portion of wire 35 passing from the bottom of the slot to the notch 49 also passes between the fingers 45 and 46 of the skate.
  • the user need only insert the bobbin into the housing which is provided for this purpose in the capsule, then pull the thread to engage it in the notch 34 and to continue its traction by directing it towards a wire cutter 50 (FIG. 1) which is carried by the frame of the device. The wire then passes under the finger 48 and rests on the bottom of the notch 49.
  • the thread cutter is shaped so as to retain the thread coming out of the bobbin and / or the needle thread and its position is such that the length of the strands allows, without others, the start of the seam.
  • the direction of rotation of the bowl 3 is such that its hook approaches the finger 48 defining said notch 49 in the arched part 33 facing it, the length of this finger 48 being sufficient to retain the bobbin thread in the notch 49 and thus prevent the needle thread loop from pulling the bobbin thread out of the tension adjustment mechanism.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
EP86810121A 1985-03-20 1986-03-10 Schlingenfänger mit umlaufendem Greifer für Nähmaschine Withdrawn EP0200675A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1234/85A CH665435A5 (fr) 1985-03-20 1985-03-20 Dispositif capteur de boucle a crochet rotatif pour machine a coudre.
CH1234/85 1985-03-20

Publications (2)

Publication Number Publication Date
EP0200675A2 true EP0200675A2 (de) 1986-11-05
EP0200675A3 EP0200675A3 (de) 1988-12-14

Family

ID=4205616

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86810121A Withdrawn EP0200675A3 (de) 1985-03-20 1986-03-10 Schlingenfänger mit umlaufendem Greifer für Nähmaschine

Country Status (6)

Country Link
EP (1) EP0200675A3 (de)
JP (1) JPS61220694A (de)
AU (1) AU5495086A (de)
CH (1) CH665435A5 (de)
ES (1) ES8701871A1 (de)
ZA (1) ZA862027B (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1699354A (en) * 1923-03-02 1929-01-15 Charles H Greenwood Sewing machine
CH238674A (fr) * 1944-01-27 1945-08-15 Sa Mefina Navette pour machine à coudre.
DE952588C (de) * 1953-04-10 1956-11-15 Messerschmitt A G Zweiteiliger Greifer fuer Naehmaschinen
US3382826A (en) * 1966-03-24 1968-05-14 Singer Co Sewing machine loop takers
CH589741A5 (en) * 1974-12-19 1977-07-15 Mefina Sa Two component coupling maintained by retractable linkage - esp. sewing machine spool holder and housing, facilitating stitch formation

Also Published As

Publication number Publication date
EP0200675A3 (de) 1988-12-14
AU5495086A (en) 1986-09-25
CH665435A5 (fr) 1988-05-13
ES8701871A1 (es) 1986-12-01
ES553100A0 (es) 1986-12-01
JPS61220694A (ja) 1986-09-30
ZA862027B (en) 1986-11-26

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Inventor name: BARUFFA, OLINDO