EP0768404A1 - Webschaft - Google Patents

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Publication number
EP0768404A1
EP0768404A1 EP96115117A EP96115117A EP0768404A1 EP 0768404 A1 EP0768404 A1 EP 0768404A1 EP 96115117 A EP96115117 A EP 96115117A EP 96115117 A EP96115117 A EP 96115117A EP 0768404 A1 EP0768404 A1 EP 0768404A1
Authority
EP
European Patent Office
Prior art keywords
healdframe
frame
heald rods
heald
rods
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Withdrawn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
EP96115117A
Other languages
English (en)
French (fr)
Inventor
Jaroslav Ing. Podzimek
Josef Ing. Viták
Jiri Ing. Mlynár
Miroslav Ing. Rydval
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.)
Tovarny textilnich potreb-ELITEX AS
Original Assignee
Tovarny textilnich potreb-ELITEX AS
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 Tovarny textilnich potreb-ELITEX AS filed Critical Tovarny textilnich potreb-ELITEX AS
Publication of EP0768404A1 publication Critical patent/EP0768404A1/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Withdrawn legal-status Critical Current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
    • D03C9/00—Healds; Heald frames
    • D03C9/06—Heald frames
    • D03C9/0608—Construction of frame parts
    • D03C9/0616—Horizontal upper or lower rods
    • D03C9/0625—Composition or used material
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C9/00—Healds; Heald frames
    • D03C9/06—Heald frames
    • D03C9/0608—Construction of frame parts
    • D03C9/065—Side stays
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C9/00—Healds; Heald frames
    • D03C9/06—Heald frames
    • D03C9/0683—Arrangements or means for the linking to the drive system

Definitions

  • the invention relates to a healdframe of a weaving machine.
  • the healdframe consists of a closed flat rectangular frame made of metal or composite material beams carrying healds with drawn-in warp threads.
  • the warp threads are drawn-in from a warp beam via a back rail into heald eyes.
  • a plurality of healdframes situated after each other and positioned transversely to warp threads.
  • the repeated reciprocating up and down movement of the healdframes provides for the opening of the warp and for creating the shed for the insertion of the weft that is then beaten-up by the beat-up reed to the face of the fabric being produced.
  • the frame proper of the healdframe consists of an upper and a lower heald rod, parallel to each other and made as beams fastened with their ends into vertical side walls.
  • heald wires on which the healds are fixed To the upper and lower heald rods are fixed by means of fastening elements heald wires on which the healds are fixed.
  • the alternating reciprocating movement of healdframes with healds is actuated by a shed mechanism consisting of a system of cams, eccentrics or of a multi-link crank mechanism, and is transmitted then by means of tie rods and hinges to each healdframe.
  • a multi-link shed mechanism the healdframes are driven by separate heald machines arranged at the side of the machine or over it. The weaving machine has then healdframes with lower and/or lower pull.
  • the healdframe construction is exposed in particular to dynamic forces due to the weight of both the healdframe and of the healds.
  • the play existing between the elements of the shed mechanism consisting of levers and other elements imposes additional impact stress both on the healdframe and on the shed mechanism proper.
  • healdframes By far most of the healdframes in use carry on their frame one row of healds mounted on heald wires.
  • Another known solution has a doubled healdframe with specially shaped healds drawn-in at the warp edges only.
  • These specially shaped healds provided in a limited number on each warp end, fulfil the function of edge entwining members for reinforcing the edges of the fabric being produced.
  • the heald elements used are made of heat treated hardened carbon material and are not intended to draw-in the whole of the warp width.
  • the healds are in this construction mounted, not in the heald wires, not being adapted to it, but directly in the shaped elements of the frame.
  • Such doubled healdframe can carry only a limited number of light-weight edge healds generating very small inertia forces.
  • These edge healds are not intended to create the shed in the warp thread width but, on the contrary,to cross them and thus to bind the weft inserted and to reinforce the edges of the fabric in process of formation.
  • a very often recurring problem is the space available for the healdframe operation and thus limiting the top size of each healdframe component.
  • the rigidity of the frame construction of the healdframes and the play in the shed mechanism are one of the limiting factors of the weaving machine speed.
  • each of its frames consists of a couple of upper heald rods and of a couple of lower heald rods fixed in one right-side and one left-side side wall, each of these heald rod couples being mutually connected.
  • This connection is provided for by transverse pins or, alternatively, as a glued connection.
  • hinges On the side walls of the healdframe frame, outside the longitudinal axis of the side walls, there are mounted hinges providing for a drive connection with the shed mechanism, with an elastic buffer interposed between the shed mechanism and the healdframe frame, i.e., either between the hinge and the shed mechanism or between the side wall of the frame and its hinge.
  • the advantage of the healdframe according to the invention consists in its increased rigidity and strength enabling it to bear higher dynamic stress and, consequently, higher operating speed of the machine. Another advantage consists in that the forces transmitted by the shed mechanism pass, not via the heald rods, but via the hinges situated on the side wall of the healdframe. Due to this, the heald rods receive no additional stress from the shed mechanism.
  • Still another advantage consists in the interconnection of the heald frame with the shed mechanism via the elastic buffer thus damping the impacts and improving the course of the dynamic forces transmitted from the frame to the shed mechanism and, consequently, reducing the stress imposed on it and increasing its service life.
  • healdframe according to the invention consists in that it permits to simplify the shed mechanism by reducing its elements due to the reduction in healdframe number on the weaving machine.
  • a rectangular frame 1 of a healdframe consists of a couple of upper heald rods 2 and of a couple of lower heald rods 3 fixed by their extremities in side walls 4 .
  • Each pair of the upper heald rods 2 and each Pair of the lower heald rods 3 in the frame 1 is in tight mutual contact throughout its length and is mutually firmly fixed together by means of transverse pins 5 provided equidistantly in the frame length.
  • this connection of the couples of the upper heald rods 2 and of the lower heald rods 3 can be made as a not represented glue connection.
  • On the inner side of the rectangular frame 1 each upper heald rod 2 and each lower heald rod 3 is fitted for instance with riders 6 used to receive heald wires 7 .
  • the heald wires 7 carry healds 8 so arranged as to form in each healdframe two rows of a set, positioned in parallel after each other. This permits to draw-in double the amount of not represented warp threads into each healdframe.
  • Each frame 1 of the healdframe is guided by its side walls 4 in a not shown guide.
  • On the outer sides of the side walls 4 are fixed hinges 9 for connecting levers 10 of a shed mechanism 11 .
  • an annulus-shaped elastic buffer 13 is interposed between a pin 12 of the hinge 9 and the mounted lever 10 .
  • the elastic buffer 13 is interposed between the side wall 4 of the frame 1 and the flat part of the hinge 9 .
  • the lever 10 is connected directly to the support pin 12 of the hinge 9 .
  • each healdframe is led in a not shown guide and oscillates transversely to the not represented warp threads thus producing their shed permitting the insertion of a not represented weft.
  • Each healdframe according to the invention has two rows of healds situated after each other and thus fulfils the function of two healdframes of the prior art embodiment. This results in the simplification of the shed mechanism 11 and in the reduction in the number of its components including the lever 10 .
  • the impacts due to the play existing in the shed mechanism 11 are reduced by the elastic buffer 13 absorbing the impacts and helping a better distribution of the dynamic forces of the healdframe.
  • the hinges 9 can be placed at another than represented length section of the side walls 4 , for instance in their extremities in order to improve the not represented lateral guiding.
  • the elastic buffer 13 is not limited to the rubber spring, given as an example of embodiment, but can be made as an equivalent construction such as thin metal string, deformation member, etc.
  • the healdframe according to the invention permits to increase the operation speed of the weaving machine and is intended to be used in particular in high speed weaving machines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP96115117A 1995-09-29 1996-09-20 Webschaft Withdrawn EP0768404A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ252795 1995-09-29
CZ952527A CZ252795A3 (en) 1995-09-29 1995-09-29 Heald shaft of a weaving machine

Publications (1)

Publication Number Publication Date
EP0768404A1 true EP0768404A1 (de) 1997-04-16

Family

ID=5465121

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96115117A Withdrawn EP0768404A1 (de) 1995-09-29 1996-09-20 Webschaft

Country Status (2)

Country Link
EP (1) EP0768404A1 (de)
CZ (1) CZ252795A3 (de)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1887326A (en) * 1930-05-24 1932-11-08 Ragan Ralph Heddle frame for looms
US2808073A (en) * 1955-02-04 1957-10-01 Pioneer Heddle And Reed Compan Heddle frames
GB829751A (en) * 1956-02-03 1960-03-09 Iwajiro Maruyama Improvements in or relating to heald frames
FR2330787A1 (fr) * 1975-11-05 1977-06-03 Egelhaaf C C Agencement de lames de tissage permettant la fabrication simultanee de deux pieces tissees
CH623364A5 (en) * 1977-11-16 1981-05-29 Sulzer Ag Heald-frame drive for weaving machines.
EP0297003A1 (de) * 1987-06-26 1988-12-28 S.A. DES ETABLISSEMENTS STAUBLI (France) Vorrichtung zum Kuppeln von Schaftrahmen mit den Transmissionselementen der Schaftmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1887326A (en) * 1930-05-24 1932-11-08 Ragan Ralph Heddle frame for looms
US2808073A (en) * 1955-02-04 1957-10-01 Pioneer Heddle And Reed Compan Heddle frames
GB829751A (en) * 1956-02-03 1960-03-09 Iwajiro Maruyama Improvements in or relating to heald frames
FR2330787A1 (fr) * 1975-11-05 1977-06-03 Egelhaaf C C Agencement de lames de tissage permettant la fabrication simultanee de deux pieces tissees
CH623364A5 (en) * 1977-11-16 1981-05-29 Sulzer Ag Heald-frame drive for weaving machines.
EP0297003A1 (de) * 1987-06-26 1988-12-28 S.A. DES ETABLISSEMENTS STAUBLI (France) Vorrichtung zum Kuppeln von Schaftrahmen mit den Transmissionselementen der Schaftmaschine

Also Published As

Publication number Publication date
CZ252795A3 (en) 1997-04-16

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

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Designated state(s): BE CH DE IT LI

RIN1 Information on inventor provided before grant (corrected)

Inventor name: RYDVAL, MIROSLAV, ING.

Inventor name: MLYNAR, JIRI, ING.

Inventor name: VITAK, JOSEF, ING.

Inventor name: PODZIMEK, JAROSLAV, ING.

17P Request for examination filed

Effective date: 19971009

17Q First examination report despatched

Effective date: 19980303

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19980714