EP0712950B1 - Joint, with fast engagement and release, for coupling the control linkage to the heald frames of looms - Google Patents

Joint, with fast engagement and release, for coupling the control linkage to the heald frames of looms Download PDF

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Publication number
EP0712950B1
EP0712950B1 EP95117429A EP95117429A EP0712950B1 EP 0712950 B1 EP0712950 B1 EP 0712950B1 EP 95117429 A EP95117429 A EP 95117429A EP 95117429 A EP95117429 A EP 95117429A EP 0712950 B1 EP0712950 B1 EP 0712950B1
Authority
EP
European Patent Office
Prior art keywords
joint
frames
guide elements
coupling
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.)
Expired - Lifetime
Application number
EP95117429A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0712950A1 (en
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.)
FIMTEXTILE SpA
Original Assignee
FIMTEXTILE 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 FIMTEXTILE SpA filed Critical FIMTEXTILE SpA
Publication of EP0712950A1 publication Critical patent/EP0712950A1/en
Application granted granted Critical
Publication of EP0712950B1 publication Critical patent/EP0712950B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C1/00—Dobbies
    • D03C1/14—Features common to dobbies of different types
    • D03C1/144—Features common to dobbies of different types linking to the heald frame

Definitions

  • the present invention concerns the weaving loom field and, in particular a joint, with fast engagement and release, for coupling to the heald frames the linkage controlling the lifting and lowering movements thereof.
  • control linkage is connected to the heald frames of looms by means of end rods thereof, the big ends of which are pivoted on said frames by way of bushes. This makes very long and complicated the operations of replacing the heald frames, which - as known - are quite frequent in looms.
  • a joint according to the preamble of claim 1 is known from FR-A-2 318 959.
  • the present invention proposes to simplify and greatly speed up this operation by supplying a fully original joint, with fast engagement and release, for coupling to the heald frames of looms the end connecting rods of the control linkage for said frames, said joint being characterized in that it comprises: tailpieces with a C-shaped seat projecting from the bottom of the frames; levers with a hook end apt to engage into said seat and the other end of which is pivoted onto the big end of the end connecting rods of the linkage; and guide elements of plastic material apt to perform only vertical movements and to contain said levers, said guide elements comprising an upper end pocket to house said tailpieces and allow them to move horizontalwise in respect of the hook ends of said levers.
  • Said pocket of the guide elements is suitably filled with lubricant, while said connecting rods are formed as forks containing the guide elements and are partially housed into the same.
  • the various guide elements are in direct mutual contact and they are free to perform movements one in respect of the other.
  • Fig. 1 shows diagrammatically, in a loom, the transmission of the lifting and lowering controls from a shedding machine to a heald frame, by means of a linkage wherein the end rods are connected to said frame by way of joints according to the present invention.
  • Figs. 2 and 3 show, on an enlarged scale, one of said joints in a position connected to the heald frame and, respectively, in a position disconnected therefrom which either precedes or follows the position of connection to said frame;
  • Figs. 4 and 5 are top plan views of the pack of heald frames of a loom showing, respectively, the connected and disconnected positions of the linkage corresponding to figs. 2 and 3.
  • the coupling of the end rods 6 of the linkage 3 to the heald frame 2 is obtained through joints 7, of the type with fast engagement and release, illustrated more clearly in figs. 2 and 3.
  • Each of said joints 7 comprises: a tailpiece 8, projecting from the bottom of the frame 2 to which it is rigidly fixed; a hook lever 9 pivoted to the big end of the connecting rod 6; and a guide element 10 of plastic material cooperating with said tailpiece 8, with said lever 9 and with said rod 6.
  • the tailpiece 8 is formed with a C-shaped seat 11, apt to house the correspondingly shaped hook end 12 of the lever 9, which can be fitted therein or disengaged therefrom by a simple horizontal sliding movement.
  • the lever 9 is housed into the guide element 10 which comprises at the top a pocket 13, into which is positioned the hook end 12 of said lever 9 and into which can be housed, to the side of said hook end 12, the frame tailpiece 8.
  • the guide element 10 is apt to perform only vertical movements, being housed between fixed vertical guides 14.
  • the connecting rod 6 - the small end of which is pivoted to the toggle lever 5 - contains the lower part of said guide element 10, being formed as a fork with its big end pivoted to the hook lever 9. At the same time, the rod 6 is partially housed into the element 10 which comprises undercuts suited for the purpose.
  • each heald frame 2 is provided with two joints 7 for coupling to the respective control linkage 3, the loom being equipped with a pack of adjacent frames 2, each moved by a linkage 3.
  • the guide elements 10 are positioned side-by-side in direct mutual contact - as shown in figs. 4 and 5 - since there are no interferences between the single hook levers 9 and between the single connecting rods 6 associated thereto, which are housed - as seen - into appropriate seats and/or undercuts of said elements 10. Because of the arrangement adopted, the guide elements 10 do not require the use of the conventional rack of known technique. It is hence possible to advantageously obtain a very compact structure. Although the guide elements, thus arranged, slide one against the other during loom operation - according to the lifting and lowering movements imparted on the single heald frames - this involves no problems, since the friction between the contacting surfaces of said elements is very limited due to the nature of the plastic material from which they are made.
  • each heald frame can be very rapidly connected to the respective linkage by a simple vertical movement, causing the insertion of the tailpieces 8 into the pockets 13 of the guide elements 10, followed by a horizontal movement, causing the engagement of the hook ends 12 into the seats 11 of said tailpieces 8: both said movements can be obtained by shifting the whole pack of frames 2 in respect of the sets of guide elements 10 and of the hook levers 9.
  • the disconnection of the heald frames from the respective linkages is obtained - just as simply and rapidly - by two movements imparted in an order and direction opposite to the previous ones.
  • the coupling between the heald frames and the respective control linkages is obtained - according to the invention - by way of members (the hook levers 9) directly connected to the end rods (6) of said linkages, with very light guide elements (10 in 14) which are not subject to the lifting and lowering loads of said frames.
  • Said coupling is moreover favoured by the presence of a complete and permanent lubrication, while low frictions are produced between the non-lubricated reciprocally slidable parts, with evident advantages as far as loom operation taking into account the high speeds of the mechanical members involved.
  • the joint of the present invention is particularly efficient and reliable, long-lasting and of limited cost.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
EP95117429A 1994-11-17 1995-11-06 Joint, with fast engagement and release, for coupling the control linkage to the heald frames of looms Expired - Lifetime EP0712950B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI942331 1994-11-17
ITMI942331A IT1270707B (it) 1994-11-17 1994-11-17 Attacco con aggancio e sgancio di tipo rapido di tiranterie ai quadri dei licci in telai di tessitura

Publications (2)

Publication Number Publication Date
EP0712950A1 EP0712950A1 (en) 1996-05-22
EP0712950B1 true EP0712950B1 (en) 1998-08-12

Family

ID=11369869

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95117429A Expired - Lifetime EP0712950B1 (en) 1994-11-17 1995-11-06 Joint, with fast engagement and release, for coupling the control linkage to the heald frames of looms

Country Status (4)

Country Link
EP (1) EP0712950B1 (it)
JP (1) JP3720100B2 (it)
DE (1) DE69504013T2 (it)
IT (1) IT1270707B (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19640370C1 (de) * 1996-09-30 1998-02-12 Dornier Gmbh Lindauer Webmaschine mit Vorrichtungen zum Aufnehmen und Führen von Schaftstangen
DE10312118A1 (de) * 2003-03-17 2004-09-30 Picanol N.V. Schaftantrieb für eine Webmaschine
KR100837207B1 (ko) * 2007-05-11 2008-06-11 장지수 직기의 종광틀 높이 조절 안내장치

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH451040A (de) * 1966-06-13 1968-05-15 Egelhaaf C C Fa Webeschaft-Hebeeinrichtung
CH488830A (de) * 1968-03-28 1970-04-15 Sulzer Ag Vorrichtung zum Kuppeln eines Webschafts mit hin- und hergehenden Antriebsplatinen
IT1081221B (it) * 1975-07-23 1985-05-16 Sulzer Ag Macchina di tessitura con liccio per muovere il dispositivo formatore del passo

Also Published As

Publication number Publication date
ITMI942331A1 (it) 1996-05-17
IT1270707B (it) 1997-05-07
EP0712950A1 (en) 1996-05-22
JPH08209481A (ja) 1996-08-13
JP3720100B2 (ja) 2005-11-24
DE69504013D1 (de) 1998-09-17
ITMI942331A0 (it) 1994-11-17
DE69504013T2 (de) 1999-01-28

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