EP0133966A2 - Steuerung für die Webschäfte einer Webmaschine - Google Patents

Steuerung für die Webschäfte einer Webmaschine Download PDF

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Publication number
EP0133966A2
EP0133966A2 EP84108930A EP84108930A EP0133966A2 EP 0133966 A2 EP0133966 A2 EP 0133966A2 EP 84108930 A EP84108930 A EP 84108930A EP 84108930 A EP84108930 A EP 84108930A EP 0133966 A2 EP0133966 A2 EP 0133966A2
Authority
EP
European Patent Office
Prior art keywords
linkage
bar
frame
rigid bar
angle levers
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Withdrawn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
EP84108930A
Other languages
English (en)
French (fr)
Other versions
EP0133966A3 (de
Inventor
Gian Luigi Cremonesi
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.)
Fimtessile Fabbrica Italiana Macchinario Tessile SpA
Original Assignee
Fimtessile Fabbrica Italiana Macchinario Tessile SpA
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 Fimtessile Fabbrica Italiana Macchinario Tessile SpA filed Critical Fimtessile Fabbrica Italiana Macchinario Tessile SpA
Publication of EP0133966A2 publication Critical patent/EP0133966A2/de
Publication of EP0133966A3 publication Critical patent/EP0133966A3/de
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C5/00—Cam or other direct-acting shedding mechanisms, i.e. operating heald frames without intervening power-supplying devices

Definitions

  • This invention relates to those devices mounted on weaving looms for determining the shed formation in accordance with the required weave for the fabric being formed.
  • Device of this type are known to generally comprise a mechanism or "dobby" provided with a series of control members governed by a reading device, which receives programmed instructions contained in punched cards, in a punched paper tape or in a drum or chain with points.
  • a reading device which receives programmed instructions contained in punched cards, in a punched paper tape or in a drum or chain with points.
  • Each of these dobby memebers is connected to a heald frame, each heald being formed from an eye traversed by one of the warp threads.
  • the selective vertical movement of these frames causes opening of the warp threads to allow passage of the weft threads in accordance with a prechosen programme corresponding to the pattern or weave to be obtained.
  • Conventional dobbies comprise those of positive type in which the frames are driven positively upwards and downwards to overcome the reaction of the taut warp threads, and those of negative type in which said drive is in a single direction, in opposition to elastic return components.
  • the present invention relates to dobbies of the second type.
  • the present invention obviates this drawback by means of a linkage characterised by comprising a rigid bar controlled by said machine; a plurality of angle levers which are pivoted to the loom frame, are hinged to said bar and are connected by connecting rods to the heald frame; and spring return means acting on said rigid bar.
  • the reference numeral 1 indicates the weaving machine (negative dobby) with its control lever 2
  • the reference numeral 3 indicates the heald frame
  • the frame 3 is controlled by the lever 2 from below by way of a rigid bar 4 and a system of angle levers 5 and connecting rods 6.
  • the angle levers 5 are pivoted at their angle to the loom frame at 7, and have their ends hinged to the bar 4 and connecting rods 6. These latter are adjustable, being formed with a telescopic extension 6A which can be locked in various positions by means of screws 6B.
  • the arrangement of Figure 1 comprises a series of return springs 8 acting substantially axially on the bar 4 by way of a swivel-mounted connector 9.
  • the aforesaid embodiment has the great advantage that the return springs 8 act directly on the pull bar 4 and thus the articulated joints of the levers 5 support no extra load due to the return effect of the springs, the entire tension of the springs being supported only by the pull bar 4 and by the weaving machine 1. Moreover, the lever arrangement is such that the bar 4 operates under tension. The method is therefore very rational and effective.
  • one of the angle levers of the linkage is replaced by a T lever 10 pivoted at its cross-point 11 to the loom frame and hinged at the end of its shank to the bar 4 and at one end of its arm to a connecting rod 6.
  • the action of the return springs 8, which are disposed perpendicular to the bar 4, is applied at 12 to the other end of the arm of said T lever by way of a swivel-mounted connector 9.
  • FIG. 3 A modification of the embodiment of Figure 2 is shown in Figure 3.
  • This linkage uses two modified angle levers 5 comprising a protuberance 5A to which the action of return spring 8, in this case inclined to the bar 4, is applied by way of swivel-mounted connectors 9.
  • Figure 4 shows a further scheme for controlling the heald frame from below, in which the rocker control lever and the first angle lever of the system are combined into a single toggle-joint lever 13 connected to the frame 3 by a connecting rod 6. There are also one or more other angle levers 5 and connecting rods 6 between the bar 4 and frame 3.
  • the control system acts by lowering the frame 3, and the return springs 8 are mounted - axially to the bar 4 - in such a manner as to return the frame 3 to its raised position.
  • Figure 5 shows a system for controlling the frame 3 from above.
  • the control lever and first angle lever of the system are combined into a single toggle-joint lever 14 connected to the frame 3 by a connecting rod 6, one or more other angle levers 5 also being provided.
  • the return springs 8 are disposed in such a manner as to return the heald frame 3 from its raised position to its lowered position, the weaving machine thus driving the frame only upward.
  • the connection between the lever 14 and levers 5 is again made by means of a rigid bar 4 (on which the springs 8 act axially), and the connecting rods 6 which connect the lever 5 and 14 to the frame 3 are also rigid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP84108930A 1983-08-12 1984-07-27 Steuerung für die Webschäfte einer Webmaschine Withdrawn EP0133966A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT8322543A IT8322543A0 (it) 1983-08-12 1983-08-12 Tiranteria per il controllo dei quadri dei licci in macchine di armatura negative.
IT2254383 1983-08-12

Publications (2)

Publication Number Publication Date
EP0133966A2 true EP0133966A2 (de) 1985-03-13
EP0133966A3 EP0133966A3 (de) 1986-03-26

Family

ID=11197638

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84108930A Withdrawn EP0133966A3 (de) 1983-08-12 1984-07-27 Steuerung für die Webschäfte einer Webmaschine

Country Status (2)

Country Link
EP (1) EP0133966A3 (de)
IT (1) IT8322543A0 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5002096A (en) * 1988-10-04 1991-03-26 Sulzer Brothers Limited Heddle frame actuating apparatus with flexure spring
US5201199A (en) * 1991-09-10 1993-04-13 Karl Mayer Textilmaschinenfabrik Gmbh Warp knitting machine with differently resonant springs
EP0627512A1 (de) * 1993-06-03 1994-12-07 S.A. DES ETABLISSEMENTS STAUBLI (France) Dämpfungssystem für Webmaschinen
WO1997013900A1 (en) * 1995-10-12 1997-04-17 Somet Societa' Meccanica Tesssile P.A. System for controlling the heald frames of double-beam vertical looms

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE671650A (de) * 1964-11-02 1966-02-14
FR2254503A1 (de) * 1973-12-13 1975-07-11 Rieter Ag Maschf
DE2651239B1 (de) * 1976-11-10 1977-12-01 Jaeger Emil Kg Druckmittelzylinder zum bewegungsantrieb von webschaeften
FR2477186A1 (fr) * 1980-02-28 1981-09-04 Staubli Sa Ets Mecanisme a leviers pour la commande des cadres de lisses d'une ratiere negative
FR2488289A1 (fr) * 1980-08-06 1982-02-12 Staubli Sa Ets Perfectionnements aux dispositifs pour la formation de la foule sur les metiers a tisser
EP0066655A1 (de) * 1981-06-01 1982-12-15 N.V. Weefautomaten Picanol Schaftzug für Webmaschinen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE671650A (de) * 1964-11-02 1966-02-14
FR2254503A1 (de) * 1973-12-13 1975-07-11 Rieter Ag Maschf
DE2651239B1 (de) * 1976-11-10 1977-12-01 Jaeger Emil Kg Druckmittelzylinder zum bewegungsantrieb von webschaeften
FR2477186A1 (fr) * 1980-02-28 1981-09-04 Staubli Sa Ets Mecanisme a leviers pour la commande des cadres de lisses d'une ratiere negative
FR2488289A1 (fr) * 1980-08-06 1982-02-12 Staubli Sa Ets Perfectionnements aux dispositifs pour la formation de la foule sur les metiers a tisser
EP0066655A1 (de) * 1981-06-01 1982-12-15 N.V. Weefautomaten Picanol Schaftzug für Webmaschinen

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5002096A (en) * 1988-10-04 1991-03-26 Sulzer Brothers Limited Heddle frame actuating apparatus with flexure spring
US5201199A (en) * 1991-09-10 1993-04-13 Karl Mayer Textilmaschinenfabrik Gmbh Warp knitting machine with differently resonant springs
EP0627512A1 (de) * 1993-06-03 1994-12-07 S.A. DES ETABLISSEMENTS STAUBLI (France) Dämpfungssystem für Webmaschinen
FR2705972A1 (fr) * 1993-06-03 1994-12-09 Staubli Sa Ets Dispositif amortisseur pour machine à tisser.
WO1997013900A1 (en) * 1995-10-12 1997-04-17 Somet Societa' Meccanica Tesssile P.A. System for controlling the heald frames of double-beam vertical looms

Also Published As

Publication number Publication date
EP0133966A3 (de) 1986-03-26
IT8322543A0 (it) 1983-08-12

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Inventor name: CREMONESI, GIAN LUIGI