EP0709504B1 - Dispositif de guidage fixe pour les tiges de commande des cadres dans un métier à tisser - Google Patents

Dispositif de guidage fixe pour les tiges de commande des cadres dans un métier à tisser Download PDF

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Publication number
EP0709504B1
EP0709504B1 EP95116892A EP95116892A EP0709504B1 EP 0709504 B1 EP0709504 B1 EP 0709504B1 EP 95116892 A EP95116892 A EP 95116892A EP 95116892 A EP95116892 A EP 95116892A EP 0709504 B1 EP0709504 B1 EP 0709504B1
Authority
EP
European Patent Office
Prior art keywords
screw
loom
rods
guide device
nut
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
EP95116892A
Other languages
German (de)
English (en)
Other versions
EP0709504A1 (fr
Inventor
Egidio Tasca
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.)
Promatech SpA
Original Assignee
SOMET Societa Meccanica Tessile SpA
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Filing date
Publication date
Application filed by SOMET Societa Meccanica Tessile SpA filed Critical SOMET Societa Meccanica Tessile SpA
Publication of EP0709504A1 publication Critical patent/EP0709504A1/fr
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Publication of EP0709504B1 publication Critical patent/EP0709504B1/fr
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
    • D03C9/06—Heald frames
    • D03C9/0683—Arrangements or means for the linking to the drive system
    • 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
    • D03C9/00—Healds; Heald frames
    • D03C9/06—Heald frames
    • D03C9/0608—Construction of frame parts
    • D03C9/065—Side stays

Definitions

  • the present invention concerns a fast guide device for the control rods of heald frames in a loom, and particularly a device of this type apt to keep in a correct position the unused control rods, when the loom is working with a number of heald frames below the maximum number thereof foreseen on the loom by the constructor.
  • the heald frames are rectangular frames formed by a pair of horizontal crosspieces and by two vertical sidepieces, into which is inserted a plurality of vertical healds - thin metal bars with a central slot - apt to guide the reciprocating motion of the warp yarns, each of which passes through the slot of a respective heald.
  • the reciprocating motion, verticalwise, of the heald frame causes the corresponding motion of groups of warp yarns, hence determining the opening of the shed according to a pattern prearranged by the weaver, to allow picking the wefts.
  • the heald frames vary in number - from a minimum of two to a maximum normally below twenty - according to the special design one wishes to weave. It is thus evident that the loom constructor sells its machines prearranged for working with a maximum number of heald frames; it is then up to the weaver to keep on the loom, each time, only the number of frames which will be required to weave a certain fabric.
  • the vertical shifting of the healds is obtained by special articulated systems which - in a particularly successful and widespread construction - impart a reciprocating motion, verticalwise, to a series of rods, commonly known as heald control rods, which in turn transmit said motion to the heald frames.
  • the device of the present invention particularly applies to this type of driving mechanism of the heald frames which, for further clearness, will now be described in detail with reference to figs. 1, 2 and 3, of which:
  • Fig. 1 shows diagrammatically a single heald frame 1, which is caused to perform a reciprocating motion verticalwise by the weave machine (not shown), through square levers 2 controlling the motion of the heald control rods 3 (two rods for each heald frame).
  • said frame is provided, at its upper corners, with coupling tabs 4 apt to engage, with a hook mouth thereof, onto a bush 5 screwed on the upper end of the rod 3 which is suitably threaded for the purpose.
  • the steady correct vertical positioning of the heald control rods 3 and consequently of the heald frames 1, and the correct spacing between them, is guaranteed by two pairs of racks 6 - one pair on each side of the group of frames - each rack being provided with a number of teeth equal to the maximum number of frames supplied on the loom.
  • Each rack tooth contributes to keep in a stable position - with the slack required to allow its free axial movement - a heald control rod 3 against the bottom of a longitudinal guide slot 8 provided on the sidepieces 7 of the frames 1, as clearly shown in the section A-A of fig. 3.
  • the racks 6 are in turn anchored onto lateral supports 9 of the loom, which are normally fixed.
  • the lateral supports 9 may however oscillate outwardly of the loom, about hingeing axes Z, so as to release the frames 1 from the racks 6 and from the heald control rods 3, and thereby allow the necessary replacements or changes on such frames, when breakages or modifications on the fabric being woven require these operations.
  • Said result is normally obtained with a pair of templates 10, having a plurality of holes 11 equal in number to that of the rods 3, each template being temporarily fixed to a respective lateral support 9 (fig.
  • a first drawback hence lies in the fact that the fixing has to be done by way of tightening elements, blocked in position by clamps, pins, or other means, which anyhow involve the use of appropriate tools.
  • Such tightening elements are normally quite numerous, as they must be changed according to the total number of inactive rods having to be blocked in position.
  • said tightening elements are not permanently set on the loom, or should anyhow be removed therefrom when wishing to use all the heald frames.
  • these are rudimentary systems, which involve the use of a variety of elements, and of tools, as well as a considerable waste of time for their setting up.
  • a second drawback lies instead in the fact that such tightening elements, presently used in technique. are not apt to safely and positively keep the heald control rods 3 in their exact working position.
  • the weaver has to work on the frames 1 and should hence previously set on the templates 10, he meets with some difficulties in introducing exactly into the holes 11 the rods 3 which were not already guided by the frames 1, that is, the non-working rods 3.
  • their hingeing onto the axis Z leaves a fair degree of freedom. not only in the plane shown in fig.
  • the object of the present invention is therefore to overcome the aforementioned drawbacks, by supplying a fast guide device for the heald control rods, which is apt to operate with the greatest simplicity and speed on all the rods 3 which are not working, independently from their number, and to keep said rods perfectly in position during the whole weaving operation, so as to create no problems when the operator has to set the templates 10 onto said rods 3.
  • said object is reached by means of a loom comprising a fast guide device for the control rods of heald frames, of the type in which one end of said rods is hinged onto the same axis on which there are hinged lateral supports to which said rods are fixed during certain weaving operations, characterized in that it comprises at least one screw and nut element, whose pitch is equal to the distance between the axes of said control rods, the nut being fixed to one of said lateral supports and the screw being positioned with its axis parallel to the plane of said rods and adjacent thereto, the thread of said screw consisting of a helical cavity apt to engage with said rods so as to keep them in a stable position between said screw and the respective lateral support.
  • the sheet on which said figure is drawn represents one of the lateral loom supports 9, to which the racks 6 are anchored and to which is also fixed the device of the present invention.
  • Said device consists of a long screw 12 and of a respective nut 13, which is fixed to the support 9 - with the interposition of a plate 14, fixed in respect of the nut 13 - by means of locking nuts housed into slots 15.
  • the thread of the screw 12 forms a helical cavity, the section of which is apt to engage - with the required slack - the section of the heald control rods 3.
  • said cavity has a rectangular section, while the heald control rods 3 have a circular section; other sections can however be provided - as shown for the heald control rods 3 in fig. 2 (Sec. B-B) - without thereby departing from the scope of the present invention.
  • the thread pitch P of the screw 12 corresponds exactly to the distance between the axes of adjacent heald control rods 3, so that, by positioning said screw next to the row of rods 3, these house themselves tangentially inside the threading of the screw 12 (see fig. 5).
  • the position of the screw 12 is axially modified by moving the plate 14 in respect of the support 9 thanks to the slots 15. Once having determined the position wherein the engagement between the screw 12 and the rods 3 takes place with the required precision, the plate 14 is locked in said position and no longer removed.
  • the heald frames are operated starting from the ones closest to the reed, up to gradually reaching the furthermost ones.
  • the device of the present invention hence allows to operate the frames just in this order, while simultaneously blocking in position the heald control rods which are not working and thereby reaching, with the greatest simplicity and efficiency, one of the objects of the present invention.
  • the screw 12 is in fact constantly operating on the loom and it requires no special tool for its forward or backward rotation since, by means of a suitable handle 16 provided on its head, it can be easily hand operated.
  • the aforedescribed guide device for control rods of heald frames allows to simultaneously reach also the second object of the invention.
  • the axial displacements performed by the screw 12 through rotation thereof - in order to vary the number of heald control rods 3 blocked in position - take place without ever releasing the grip on such rods, which hence keep their position permanently unaltered.
  • any heald control rods which must cease to work are, after removal of the respective heald frame, immediately set in a correct position by simple forward rotation of the screw 12.
  • the heald control rods 3 are in a perfectly and constantly centred position, whereby their insertion into the template 10 (which is anyhow always useful, as it provides to position and block the working rods before removal of the heald frames, and thus before the screw 12 may block them in position) is extremely easy, and could even be obtained automatically, seen that a manual intervention - required up to date - is no longer needed to cause the exact insertion of each of the non-working rods 3 into the corresponding hole 11 of the template 10.
  • the working of the nut 13 has not been illustrated in detail, as it concerns a fully known mechanical construction.
  • Said nut can be of the thread type or of the pin type, or even of other types, without altering the functionality of the fast guide device of the invention.
  • the nut 13 is simply required to guarantee a total absence of axial slack of the screw 12 and, at the same time, to provide locking means to stop the rotation of said screw and block it in the wanted position during the loom working steps. It is not important for the screw 12 to be rigidly blocked in position - since, as already said, the rotations thereof do not change the position of the heald control rods - but it is sufficient for the locking means to prevent a rotation of said screw which could lead its front end to interfere with the last working frame.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Chain Conveyers (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)

Claims (7)

  1. Métier comprenant un dispositif de guidage fixe pour les tiges de commande (3) de cadres à lisses (1) du type dans lequel une extrémité desdites tiges (3) est articulée sur le même axe (Z) sur lequel sont articulés des supports latéraux (9) auxquels lesdites tiges (3) sont fixées durant certaines opérations de tissage, caractérisé en ce qu'il comprend au moins un élément à vis (12) et écrou (13), dont le pas (P) est égal à la distance entre les axes desdites tiges de commande (3), l'écrou (13) étant fixé à l'un desdits supports latéraux (9) et la vis (12) étant positionnée avec son axe parallèle au plan desdites tiges (3) et adjacent à celui-ci, le filet de ladite vis consistant en une cavité hélicoïdale adaptée à s'engager avec lesdites tiges (3) de manière à les garder dans une position stable entre ladite vis et le support latéral (9) respectif.
  2. Métier comprenant un dispositif de guidage selon la revendication 1, dans lequel ledit écrou (13) est fixé au support latéral (9) par un moyen de fixation (15) permettant de régler la position axiale de ladite vis (12).
  3. Métier comprenant un dispositif de guidage selon la revendication 1, dans lequel ledit écrou (13) est du type avec un filet intérieur coopérant avec la cavité hélicoïdale de ladite vis (12).
  4. Métier comprenant un dispositif de guidage selon la revendication 1, dans lequel ledit écrou (13) est du type tige coopérant avec la cavité hélicoïdale de ladite vis (12).
  5. Métier comprenant un dispositif de guidage selon la revendication 1, dans lequel ledit écrou (13) comprend également un moyen de blocage pour arrêter la rotation de ladite vis (12) en une position souhaitée.
  6. Métier comprenant un dispositif de guidage selon la revendication 1, dans lequel lesdites tiges de commande (3) des cadres à lisses (1) ont une section circulaire ou ovale, et la section de la cavité hélicoïdale de ladite vis (12) est carrée ou rectangulaire.
  7. Métier comprenant un dispositif de guidage selon la revendication 1, dans lequel l'axe de ladite vis (12) est incliné par rapport au plan horizontal du métier d'un angle (α) égal à l'inclinaison du filet de vis.
EP95116892A 1994-10-27 1995-10-26 Dispositif de guidage fixe pour les tiges de commande des cadres dans un métier à tisser Expired - Lifetime EP0709504B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI942201A IT1270680B (it) 1994-10-27 1994-10-27 Dispositivo di guida rapido degli attaccalicci in un telaio di tessitura
ITMI942201 1994-10-27

Publications (2)

Publication Number Publication Date
EP0709504A1 EP0709504A1 (fr) 1996-05-01
EP0709504B1 true EP0709504B1 (fr) 1998-12-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP95116892A Expired - Lifetime EP0709504B1 (fr) 1994-10-27 1995-10-26 Dispositif de guidage fixe pour les tiges de commande des cadres dans un métier à tisser

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Country Link
EP (1) EP0709504B1 (fr)
DE (1) DE69506366T2 (fr)
IT (1) IT1270680B (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2815048B1 (fr) * 2000-10-06 2002-12-20 Staubli Sa Ets Dispositif pour l'accouplement d'un cadre de lisses sur un element de transmission de mouvement, ensemble d'entrainement et metier a tisser equipe d'un tel ensemble

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH670113A5 (fr) * 1986-07-04 1989-05-12 Sulzer Ag

Also Published As

Publication number Publication date
ITMI942201A0 (it) 1994-10-27
DE69506366D1 (de) 1999-01-14
DE69506366T2 (de) 1999-06-10
IT1270680B (it) 1997-05-07
ITMI942201A1 (it) 1996-04-27
EP0709504A1 (fr) 1996-05-01

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